Circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker which comprises a circuit breaker body and a switch rotationally arranged on one side of the circuit breaker body to control a circuit to be opened and closed. The automatic recovery assembly comprises a gear mechanism and a one-way rotating mechanism, the gear mechanism rotates along with rotation of the switch, and when the gear mechanism is powered on, the gear mechanism drives the switch to rotate to a first direction; the one-way rotating mechanism restrains the rotating direction of the gear mechanism. The device has the beneficial effects that the device can automatically close the circuit breaker body after a fault is cleared, manual intervention is not needed, and the automation level and convenience of the device are improved; by using the one-way rotating mechanism, the rotation of the driven gear is ensured not to be interfered by the worm gear when the switch is switched off due to a fault, so that the reliability of the device is ensured, and unnecessary abrasion or damage is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, in particular to a circuit breaker. Background Art

[0002] A circuit breaker is an electrical device installed in a transmission line, a substation line or a part of a circuit, and switches loads or protects electrical facilities and loads by disconnecting the circuit when a fault such as a short circuit occurs. Among them, a miniature circuit breaker (a miniature wiring circuit breaker) is installed in a small distribution board that forms an AC 110 / 220V low-voltage circuit (15 to 30A), and is used for overcurrent protection and short-circuit protection. It is also installed in a distribution board as a switch in a residence, a shopping mall, an office, a shopping mall, etc., and is used as a device that can conveniently switch multiple loads at one place.

[0003] Although the circuit breaker of the prior art has good performance in controlling the on and off of the circuit, it still has many defects in the user experience. For example, whether the user manually turns the handle to switch the power control mechanism of the circuit breaker from the on state to the off state, or the power control mechanism of the circuit breaker is switched from the on state to the off state due to circuit abnormality, it is necessary to manually turn the handle upward to switch the power control mechanism of the circuit breaker from the off state to the on state. Especially for some usage environments, such as home decoration, the circuit breaker is installed at a higher position, which makes it more inconvenient for users with short stature to use. Summary of the invention

[0004] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] The object of the present invention is to provide a circuit breaker.

[0006] Therefore, an object thereof is to solve the problem that the circuit breaker is installed at a high position, which makes it more troublesome for users of short stature to use.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a circuit breaker, comprising a circuit breaker assembly, comprising a circuit breaker body, a switch rotatably arranged on one side of the circuit breaker body to control the opening and closing of a circuit; an automatic recovery assembly, comprising a gear mechanism and a one-way rotation mechanism, wherein the gear mechanism rotates following the rotation of the switch, and when the gear mechanism is energized, the gear mechanism drives the switch to rotate to a first direction; the one-way rotation mechanism constrains the rotation direction of the gear mechanism, and when the switch drives the gear mechanism to rotate to a second direction, the one-way rotation mechanism causes the gear mechanism to idle.

[0008] As a preferred solution of the circuit breaker of the present invention, the gear mechanism includes a coaxial rotating shaft fixed to the switch axis, a sector gear is fixed to the outside of the coaxial rotating shaft, a driven gear is meshed on one side of the sector gear, and a worm gear is coaxially arranged on the driven gear.

[0009] As a preferred solution of the circuit breaker of the present invention, a worm is meshed on the outer side of the worm wheel, one end of the worm is drivingly connected to a motor, and the motor is fixed to the circuit breaker body by bolts.

[0010] As a preferred solution of the circuit breaker of the present invention, the one-way rotation mechanism includes a first fixing ring and a second fixing ring, the first fixing ring is coaxially fixed to the driven gear, the second fixing ring is coaxially fixed to the worm gear, and the first fixing ring and the second fixing ring are arranged opposite to each other.

[0011] As a preferred solution of the circuit breaker of the present invention, the first fixing ring and the second fixing ring have grooves spaced apart from each other on their opposite surfaces, the second fixing ring and the first fixing ring have a plurality of fixing cylinders fixed on their opposite surfaces, the fixing cylinders are telescopically provided with limit rods toward one end of the first fixing ring, and a compression spring is fixed between the limit rods and the fixing cylinders;

[0012] Wherein, an inclined release is arranged in the groove, and when the groove is rotated toward a preset direction, the inclined release will squeeze the compression spring out of the groove, thereby realizing the one-way rotation of the driven gear.

[0013] As a preferred solution of the circuit breaker of the present invention, the delayed starting component is used to control the power-on time of the motor, which includes a circuit disconnection mechanism and a delayed reset mechanism. When the power is off, the delayed reset mechanism delays sliding in the direction of the circuit disconnection mechanism until the delayed reset mechanism contacts the circuit disconnection mechanism to realize delayed power-on of the motor.

[0014] As a preferred solution of the circuit breaker of the present invention, wherein: the circuit disconnecting mechanism is fixed to the inner wall of the circuit breaker body with a protective shell, a first contact piece is fixed inside the protective shell, the output end of the first contact piece is connected to the motor through a wire, the input end of the first contact piece is connected to a battery through a wire, and the battery is detachably mounted on the circuit breaker body.

[0015] As a preferred solution of the circuit breaker of the present invention, the delayed reset mechanism includes a second contact piece slidably arranged with the inner wall of the protective shell, a push spring is abutted between the second contact piece and the protective shell, a piston is fixed to the end of the second contact piece away from the first contact piece, and a cylinder for accommodating the sliding of the piston is provided inside the protective shell.

[0016] As a preferred solution of the circuit breaker of the present invention, a delay ring is fixed inside the cylinder, a plurality of connecting holes are opened on the surface of the delay ring, a cavity connected to the plurality of connecting holes is opened inside the delay ring, and the cylinder is filled with a medium.

[0017] As a preferred solution of the circuit breaker of the present invention, a control rod is rotatably provided on the outer side of the circuit breaker body, the control rod is threadedly connected to the cylinder, and the position of the cylinder is adjusted by rotating the control rod.

[0018] The beneficial effects of the circuit breaker of the present invention are as follows: the device can automatically close the circuit breaker body after the fault is cleared without manual intervention, thereby improving the automation level and convenience of the device; by using a one-way rotation mechanism, it is ensured that when the switch is disconnected due to a fault, the rotation of the driven gear will not be interfered by the worm gear, which ensures the reliability of the device and avoids unnecessary wear or damage.

[0019] The delay mechanism ensures that the circuit has sufficient cooling time and fault elimination time after a short circuit or other overload occurs, thereby preventing repeated restarts from causing further damage. The manual shutdown function allows users to choose manual control when they do not want the circuit breaker to reset automatically, increasing the flexibility and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative work. Among them:

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the circuit breaker in the present invention.

[0022] Figure 2 It is a front view structural schematic diagram of the circuit breaker in the present invention.

[0023] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the one-way rotating mechanism of the circuit breaker in the present invention.

[0024] Figure 4 It is a schematic diagram of the top view of the one-way rotating mechanism of the circuit breaker in the present invention.

[0025] Figure 5 It is a schematic cross-sectional three-dimensional structural diagram of the delayed starting component of the circuit breaker in the present invention.

[0026] Figure 6 It is a schematic cross-sectional structure diagram of the delay ring of the circuit breaker in the present invention.

[0027] In the figure:

[0028] 100. Circuit breaker assembly; 101. Circuit breaker body; 102. Switch;

[0029] 200, automatic recovery assembly; 201, gear mechanism; 202, one-way rotation mechanism;

[0030] 201a, concentric rotating shaft; 201b, sector gear; 201c, driven gear; 201d, worm wheel; 201e, worm; 201f, motor;

[0031] 202a, first fixing ring; 202b, second fixing ring; 202c, groove; 202d, inclined release; 202e, fixing cylinder; 202f, limiting rod; 202g, compression spring;

[0032] 300, delayed start assembly; 301, circuit disconnection mechanism; 302, delayed reset mechanism; 303, control rod;

[0033] 301a, protective housing; 301b, first contact sheet; 301c, battery;

[0034] 302a, second contact piece; 302b, push spring; 302c, piston; 302d, cylinder; 302e, delay ring; 302f, connecting hole; 302g, cavity. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1, reference Figure 1-2, is the first embodiment of the present invention, which provides a circuit breaker, a circuit breaker assembly 100, which includes a circuit breaker body 101, a switch 102 rotatably arranged on the circuit breaker body 101 to control the opening and closing of the circuit; an automatic recovery assembly 200, which includes a gear mechanism 201 and a one-way rotation mechanism 202, the gear mechanism 201 rotates following the rotation of the switch 102, when the gear mechanism 201 is energized, the gear mechanism 201 drives the switch 102 to rotate to a first direction; the first direction can be the direction of driving the switch 102 to break the circuit, the one-way rotation mechanism 202 constrains the rotation direction of the gear mechanism 201, when the switch 102 drives the gear mechanism 201 to rotate to a second direction, the second direction can be the direction of driving the switch 102 to restore the conduction movement, and the one-way rotation mechanism 202 causes the gear mechanism 201 to idle.

[0039] The automatic reset assembly 200 allows the circuit breaker body 101 to be automatically reset under certain conditions. For example, after an overload or short circuit event causes the circuit breaker to trip, once conditions return to normal, the circuit can be automatically reclosed, reducing the need for manual intervention.

[0040] When the switch is driven by external factors such as manual operation or other mechanical forces to a direction opposite to the preset restoring direction, the one-way rotation mechanism 202 will cause the gear mechanism 201 to idle, thereby avoiding unnecessary reverse stress on the gear mechanism 201 and extending the service life of the equipment.

[0041] Due to the existence of the automatic recovery component 200, power supply can be quickly restored after it is detected that the fault is eliminated, thereby improving the overall efficiency of the device, which is especially important for equipment that requires continuous power supply.

[0042] The automated process reduces the need for manual inspection and resetting of the circuit breaker body 101, thereby reducing maintenance costs and reducing problems caused by human error.

[0043] In some critical applications, such as data centers, medical equipment or industrial control systems, automated circuit breaker restoration can ensure that service is restored in the shortest possible time.

[0044] Example 2, reference Figure 2-4, which is the second embodiment of the present invention. Different from the previous embodiment, the gear mechanism 201 includes a coaxial shaft 201a fixed to the axis of the switch 102, a sector gear 201b is fixed to the outside of the coaxial shaft 201a, a driven gear 201c is meshed on one side of the sector gear 201b, and a worm gear 201d is coaxially arranged on the driven gear 201c. A worm 201e is meshed on the outside of the worm gear 201d, and a motor 201f is transmission-connected to one end of the worm 201e, and the motor 201f is fixed to the circuit breaker body 101 by bolts. The one-way rotation mechanism 202 includes a first fixing ring 202a and a second fixing ring 202b, the first fixing ring 202a is coaxially fixed to the driven gear 201c, the second fixing ring 202b is coaxially fixed to the worm gear 201d, and the first fixing ring 202a and the second fixing ring 202b are arranged opposite to each other. Grooves 202c are provided at intervals on the opposite surfaces of the first fixing ring 202a and the second fixing ring 202b, and a plurality of fixing cylinders 202e are fixed on the opposite surfaces of the second fixing ring 202b and the first fixing ring 202a. A limit rod 202f is provided on the fixing cylinder 202e to be telescopically extended toward one end of the first fixing ring 202a, and a compression spring 202g is fixed between the limit rod 202f and the fixing cylinder 202e; wherein, an inclined release 202d is provided in the groove 202c, and when the groove 202c is rotated toward a preset direction, the inclined release 202d will squeeze the compression spring 202g out of the groove 202c, thereby realizing the unidirectional rotation of the driven gear 201c.

[0045] In this embodiment, when the circuit breaker body 101 is in a short circuit or other faults causing the switch 102 to be disconnected, Figure 2 As shown, when the switch 102 is disconnected, it drives the coaxially fixed concentric shaft 201a to rotate to a preset angle, such as 50°-130°. When the concentric shaft 201a rotates, it drives the meshing driven gear 201c to rotate through the fan gear 201b. When the driven gear 201c rotates, it will not drive the worm wheel 201d to rotate through the one-way rotation mechanism 202. Since the worm wheel 201d and the worm 201e are a worm gear structure, the worm wheel 201d cannot drive the worm 201e to rotate. By limiting the rotation direction of the driven gear 201c, the driven gear 201c will not be interfered by the worm wheel 201d when it is driven to rotate by the switch 102, thereby ensuring the normal rotation of the parts.

[0046] The motor 201f is powered by the battery 301c, so it is not affected by the short circuit of the circuit breaker body 101. When the motor 201f is powered on and started, its output end drives the worm 201e to rotate, and the worm 201e drives the meshing worm wheel 201d to rotate. At this time, the rotation direction of the worm wheel 201d meets the limitation of the one-way rotation mechanism 202, so the worm wheel 201d drives the driven gear 201c to rotate synchronously, and the driven gear 201c drives the concentric shaft 201a through the meshing fan gear 201b, and the concentric shaft 201a drives the switch 102 to close, thereby restoring the conductive state.

[0047] The motor 201f can be a servo motor or a controller can be used to control the number of revolutions of the motor 201f, so that when the motor 201f rotates to a preset number of revolutions, the switch 102 is just closed to avoid damage to components caused by excessive number of revolutions.

[0048] In summary, the device can automatically close the circuit breaker body 101 after the fault is cleared without manual intervention, thereby improving the automation level and convenience of the device.

[0049] By using the one-way rotation mechanism 202, it is ensured that when the switch 102 is disconnected due to a fault, the rotation of the driven gear 201c will not be interfered by the worm gear 201d, which ensures the reliability of the device and avoids unnecessary wear or damage.

[0050] The motor 201f is powered by a separate battery 301c, thus ensuring the normal operation of the reset mechanism even if the main circuit fails.

[0051] By using a servo motor or a motor 201f with a controller, the number of rotations of the motor 201f can be precisely controlled to ensure that the circuit breaker body 101 is closed at the correct position, which can prevent mechanical damage that may be caused by excessive rotation and help extend the service life of the equipment.

[0052] Automatic resetting reduces the need for manual on-site resetting of the circuit breaker body 101, reduces maintenance costs and improves the overall efficiency of the device.

[0053] In addition, if Figure 3-4 As shown, when the driven gear 201c is driven by the switch 102 to rotate, the driven gear 201c synchronously drives the first fixed ring 202a to rotate. When the first fixed ring 202a rotates, the inclined release 202d will squeeze the limit rod 202f out of the groove 202c in turn, so that no transmission occurs between the first fixed ring 202a and the second fixed ring 202b, so that the rotation of the driven gear 201c will not be interfered.

[0054] When the worm wheel 201d is driven by the worm 201e to rotate, the limit rod 202f will abut against the inner wall of the groove 202c to achieve power transmission, thereby driving the driven gear 201c to rotate synchronously through the first fixing ring 202a, and automatically restoring the switch 102 to the on state, thereby solving the problem that the circuit breaker is installed at a higher position, which makes it more inconvenient for short users to use.

[0055] It should be noted that the limit rod 202f is arranged in cooperation with the compression spring 202g and the fixed tube 202e, so that the limit rod 202f can automatically shrink when squeezed by the inclined release 202d, and when not squeezed, it can automatically resist the groove 202c under the action of the elastic force of the compression spring 202g to realize the transmission of power.

[0056] Example 3, reference Figure 5-6 , which is the third embodiment of the present invention, and this embodiment further provides a circuit breaker. The delayed starting component 300 is used to control the power-on time of the motor 201f, and includes a circuit disconnection mechanism 301 and a delayed reset mechanism 302. When the power is off, the delayed reset mechanism 302 delays sliding in the direction of the circuit disconnection mechanism 301 until the delayed reset mechanism 302 contacts the circuit disconnection mechanism 301 to realize the delayed power-on of the motor 201f. The circuit disconnection mechanism 301 is fixed to a protective shell 301a on the inner wall of the circuit breaker body 101, and a first contact piece 301b is fixed inside the protective shell 301a. The output end of the first contact piece 301b is connected to the motor 201f through a wire, and the input end of the first contact piece 301b is connected to a battery 301c through a wire. The battery 301c is detachably mounted on the circuit breaker body 101. The time-delay reset mechanism 302 includes a second contact piece 302a that is slidably arranged with the inner wall of the protective housing 301a, a push spring 302b is abutted between the second contact piece 302a and the protective housing 301a, a piston 302c is fixed to the end of the second contact piece 302a away from the first contact piece 301b, and a cylinder 302d for accommodating the sliding of the piston 302c is arranged inside the protective housing 301a. A delay ring 302e is fixed inside the cylinder 302d, a plurality of connecting holes 302f are opened on the surface of the delay ring 302e, a cavity 302g connected with the plurality of connecting holes 302f is opened inside the delay ring 302e, and a medium is filled inside the cylinder 302d. A control rod 303 is rotatably arranged outside the circuit breaker body 101, and the control rod 303 is threadedly connected with the cylinder 302d, and the position of the cylinder 302d is adjusted by rotating the control rod 303.

[0057] In this embodiment, a delayed starting component 300 is added to delay the starting of the motor 201f, that is, to avoid the motor 201f starting immediately to restore the circuit breaker body 101 to the on state when the circuit breaker body 101 is disconnected, thereby preventing the circuit equipment from being damaged.

[0058] Specifically, the circuit breaker body 101 is energized for the first contact piece 301b, and the magnetic force generated by the first contact piece 301b overcomes the elastic force of the push spring 302b, so that the second contact piece 302a moves and separates from the first contact piece 301b. At the same time, the second contact piece 302a pushes the piston 302c when it moves, and the piston 302c squeezes the medium into the delay ring 302e. At this time, the motor 201f is in the circuit-breaking state. When the circuit breaker body 101 is powered off, the push spring 302b pushes the second contact piece 302a to fit with the circuit disconnection mechanism 301, so as to achieve the circuit connection and power-on operation of the motor 201f.

[0059] Among them, the second contact piece 302a will drive the piston 302c to move when it is active, and the medium in the delay ring 302e will slowly flow out through the connecting hole 302f. Under the action of pressure, the moving speed of the piston 302c is controlled, and then the connecting speed between the second contact piece 302a and the protective shell 301a is controlled, thereby realizing the delayed start of the motor 201f. Among them, the delay speed can be changed by controlling the inner diameter of the connecting hole 302f.

[0060] It should be noted that when the circuit breaker body 101 does not need to be automatically turned on, the user can rotate the control rod 303, and the control rod 303 drives the cylinder 302d to move away from the first contact piece 301b through the thread, thereby increasing the distance between the first contact piece 301b and the second contact piece 302a, making it impossible for the two to fit together, thereby achieving manual closing; the medium is preferably a viscous solution.

[0061] In addition, the first contact piece 301b is composed of an electromagnet insulating layer and a metal connecting piece, so when the first contact piece 301b is energized, a magnetic repulsive force can be applied to the second contact piece 302a.

[0062] In summary, the delay mechanism can ensure that the circuit has sufficient cooling time and fault elimination time after a short circuit or other overload condition occurs, thereby preventing repeated startup from causing further damage.

[0063] Delayed start can avoid unnecessary restarts due to momentary current fluctuations, which helps reduce the possibility of false operation.

[0064] The manual shutdown function allows users to choose manual control when they do not want the circuit breaker to automatically reset, increasing the flexibility and reliability of the device.

[0065] In some cases, resetting the circuit breaker body 101 immediately may result in a dangerous situation, such as under a sustained overload condition. The delayed start mechanism can give more time to identify and resolve potential problems, thereby improving overall safety.

[0066] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0067] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0068] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A circuit breaker, characterized in that: include, A circuit breaker assembly (100) comprising a circuit breaker body (101), and a switch (102) rotatably arranged on one side of the circuit breaker body (101) to control the opening and closing of a circuit; An automatic recovery component (200) comprises a gear mechanism (201) and a one-way rotation mechanism (202), wherein the gear mechanism (201) rotates following the rotation of the switch (102), and when the gear mechanism (201) is powered on, the gear mechanism (201) drives the switch (102) to rotate to a first direction; The one-way rotation mechanism (202) constrains the rotation direction of the gear mechanism (201); when the switch (102) drives the gear mechanism (201) to rotate to a second direction, the one-way rotation mechanism (202) causes the gear mechanism (201) to idle.

2. The circuit breaker according to claim 1, characterized in that: The gear mechanism (201) comprises a coaxial rotating shaft (201a) fixed to the axis of the switch (102), a sector gear (201b) being fixed on the outside of the coaxial rotating shaft (201a), a driven gear (201c) being meshed on one side of the sector gear (201b), and a worm gear (201d) being coaxially arranged on the driven gear (201c).

3. The circuit breaker according to claim 2, characterized in that: A worm (201e) is meshed with the outside of the worm wheel (201d), one end of the worm (201e) is drivingly connected to a motor (201f), and the motor (201f) is fixed to the circuit breaker body (101) by bolts.

4. The circuit breaker according to claim 3, characterized in that: The one-way rotation mechanism (202) comprises a first fixing ring (202a) and a second fixing ring (202b), wherein the first fixing ring (202a) is coaxially fixed to the driven gear (201c), and the second fixing ring (202b) is coaxially fixed to the worm gear (201d), and the first fixing ring (202a) and the second fixing ring (202b) are arranged opposite to each other.

5. The circuit breaker according to claim 4, characterized in that: The first fixing ring (202a) and the second fixing ring (202b) are provided with grooves (202c) at intervals on the opposite surfaces thereof; a plurality of fixing tubes (202e) are fixed on the opposite surfaces of the second fixing ring (202b) and the first fixing ring (202a); a limiting rod (202f) is provided on the fixing tube (202e) to be telescopically arranged toward one end of the first fixing ring (202a); a compression spring (202g) is fixed between the limiting rod (202f) and the fixing tube (202e); The groove (202c) is provided with an inclined release opening (202d), and when the groove (202c) is rotated in a preset direction, the inclined release opening (202d) will squeeze the compression spring (202g) out of the groove (202c), thereby achieving unidirectional rotation of the driven gear (201c).

6. The circuit breaker according to claim 5, characterized in that: The delayed start component (300) is used to control the power-on time of the motor (201f), and comprises a circuit disconnection mechanism (301) and a delayed reset mechanism (302). When the power is off, the delayed reset mechanism (302) delays sliding in the direction of the circuit disconnection mechanism (301) until the delayed reset mechanism (302) contacts the circuit disconnection mechanism (301) to achieve delayed power-on of the motor (201f).

7. The circuit breaker according to claim 6, characterized in that: The circuit disconnection mechanism (301) is fixed to a protective shell (301a) on the inner wall of a circuit breaker body (101); a first contact piece (301b) is fixedly provided inside the protective shell (301a); an output end of the first contact piece (301b) is connected to a motor (201f) via a wire; an input end of the first contact piece (301b) is connected to a battery (301c) via a wire; and the battery (301c) is detachably mounted on the circuit breaker body (101).

8. The circuit breaker according to claim 7, characterized in that: The delayed reset mechanism (302) comprises a second contact piece (302a) slidably arranged with the inner wall of the protective shell (301a), a push spring (302b) is abutted between the second contact piece (302a) and the protective shell (301a), a piston (302c) is fixed to one end of the second contact piece (302a) away from the first contact piece (301b), and a cylinder (302d) for accommodating the sliding of the piston (302c) is provided inside the protective shell (301a).

9. The circuit breaker according to claim 8, characterized in that: A delay ring (302e) is fixed inside the cylinder (302d), a plurality of connecting holes (302f) are provided on the surface of the delay ring (302e), a cavity (302g) connected to the plurality of connecting holes (302f) is provided inside the delay ring (302e), and a medium is filled inside the cylinder (302d).

10. The circuit breaker according to claim 6, characterized in that: A control rod (303) is rotatably arranged on the outer side of the circuit breaker body (101); the control rod (303) is threadedly connected to the cylinder (302d); and the position of the cylinder (302d) is adjusted by rotating the control rod (303).

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