A circuit breaker

Abstract

The present application discloses a circuit breaker, comprising: a shell having an inner cavity; a drive shaft and a drive part, wherein the drive part and the second end of the drive shaft form a synchronous motion, and the position of the drive part deviates from the first axis; an inner handle, wherein the inner handle and the drive part form a linkage, and the inner handle has a closing position, a tripping position and an opening position, and the tripping position is between the closing position and the opening position; a moving contact assembly, wherein one end of the moving contact assembly is hinged to the inner handle, the axis of the hinge is parallel to the second direction, and the hinge rotates with the inner handle; a lock assembly, which has a locked state and an unlocked state; when the inner handle is in the tripping position, the lock assembly is in the unlocked state; a rotating member, which is arranged to rotate with the shell around a third axis; a mechanism spring, which is connected between the moving contact assembly and the rotating member; the present application has an operating mechanism with three states and a compact structure, which is very suitable for explosion-proof circuit breakers.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and in particular to a circuit breaker. Background Art

[0002] Existing explosion-proof circuit breakers often simply place an existing miniature circuit breaker inside an explosion-proof enclosure. The operating mechanism of this miniature circuit breaker only has open and closed positions. It lacks a separate tripping indicator (indicating the trip position). Even in the event of a line fault (such as leakage, overload, or short circuit), the operating handle will only indicate the open position. Furthermore, because existing explosion-proof circuit breakers simply insert a miniature circuit breaker into an explosion-proof enclosure, the performance of the circuit breaker is constrained by the structure of the miniature circuit breaker itself, making it difficult to improve.

[0003] In the field of circuit breakers, the operating mechanism of the molded case circuit breaker is generally capable of realizing trip display (indicating trip position). However, the operating mechanism of the molded case circuit breaker cannot be directly applied to the explosion-proof circuit breaker because the operating mechanism of even the smallest molded case circuit breaker occupies a very large space and is not suitable for explosion-proof circuit breakers.

[0004] Therefore, it is very meaningful to design an operating mechanism that can realize three-position indication and can be directly applied inside the explosion-proof cover of the explosion-proof circuit breaker. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a circuit breaker.

[0006] The present application provides: a circuit breaker, comprising:

[0007] a housing having an inner cavity;

[0008] The operating mechanism includes a drive shaft and a drive portion disposed in the inner cavity, an inner handle, a rotating member, a locking assembly, a moving contact assembly, and a mechanism spring;

[0009] A drive shaft is rotatably disposed with the housing around a first axis, the first axis being parallel to the first direction, a first end of the drive shaft being exposed outside the housing for operation, and a second end being located in the inner cavity;

[0010] a driving portion, wherein the driving portion and the second end of the driving shaft form a synchronous motion, and the position of the driving portion is offset from the first axis;

[0011] The inner handle is rotatably arranged with the outer shell around a second axis, the second axis is parallel to the second direction, the inner handle forms a linkage with the drive portion, and the linkage position is located above the second axis in the first direction; the inner handle has a closed position corresponding to the operating mechanism being in a closed state, a tripped position corresponding to the operating mechanism being in a tripped state, and an open position corresponding to the operating mechanism being in an open state, and the tripped position is between the closed position and the open position;

[0012] a moving contact assembly, one end of the moving contact assembly being hinged to the inner handle, the axis of the hinge being parallel to the second direction, and the hinge rotating along with the inner handle;

[0013] The lock catch assembly has a locked state in which it is locked with the first locking portion and an unlocked state in which it is unlocked with the first locking portion; when the inner handle is in the closing position and the opening position, the lock catch assembly is in the locked state; when the inner handle is in the tripping position, the lock catch assembly is in the unlocked state;

[0014] The rotating member is rotatably arranged with the housing around a third axis, the third axis being parallel to the second direction, and the rotating member includes a first locking portion and a reset portion; the reset portion is located on a side of the inner handle moving in the opening direction, and when the inner handle is in the trip position, when the inner handle is driven to move toward the opening position, the inner handle pushes the reset portion to rotate the rotating member, thereby re-locking the first locking portion and the lock assembly;

[0015] A mechanism spring is connected between the moving contact assembly and the rotating member to provide a spring force for switching the state of the operating mechanism. When the operating mechanism is in the closed state, the mechanism spring is in an energy storage state, and the operating mechanism maintains a steady state under the locking action of the lock assembly and the first locking portion. When the lock assembly is driven, the steady state is broken, and the operating mechanism switches to the tripped state under the action of the mechanism spring.

[0016] The first direction and the second direction are two directions perpendicular to each other; in the first direction, the hinge is always located between the second axis and the third axis.

[0017] In some embodiments of the present application, the shell includes a cover shell, a base plate, a first support member and a second support member; the inner cavity is opened on the cover shell, the bottom of the cover shell has an inner cavity opening, and the base plate is fixed to the cover shell to close the inner cavity opening; the first support member and the second support member are both in the inner cavity, and the inner cavity wall and the first support member jointly limit the inner handle to form a rotation setting of the inner handle and the outer shell, and the inner cavity wall and the second support member jointly limit the rotating member to form a rotation setting of the rotating member and the outer shell; the first support member, the second support member and the cover shell are detachably fixed, or the first support member, the second support member are fixed to the base plate, or the first support member, the second support member and the base plate are integrally formed.

[0018] In some embodiments of the present application, the inner cavity includes at least one pole space, and the inner handle has a contact mounting portion arranged in each pole space; the number of moving contact assemblies is consistent with the number of pole spaces, and each contact mounting portion corresponds to a moving contact assembly; a mounting cavity is provided on the contact mounting portion, and a mounting groove is provided on the wall of the mounting cavity; the moving contact assembly includes a contact rotating shaft, and one end of the moving contact assembly extends into the mounting groove through the contact rotating shaft to form a hinge, and during the rotation of the inner handle about the second axis, the hinge follows the rotation of the inner handle under the action of the groove wall of the mounting groove.

[0019] In some embodiments of the present application, the inner cavity includes at least one pole space, and the rotating member has a rotating sub-part arranged in each pole space; the number of moving contact assemblies and mechanism springs is consistent with the number of pole spaces, and each rotating sub-part corresponds to a moving contact assembly and a mechanism spring; the two ends of the mechanism spring are connected between the corresponding rotating sub-part and the moving contact assembly, and in the process of the operating mechanism changing from the open state to the closed state, the mechanism spring first stores energy and then releases energy to accelerate the movement of the moving contact assembly, and the mechanism spring provides final pressure for the moving contact assembly.

[0020] In some embodiments of the present application, the inner cavity includes at least one pole space, each corresponding to a set of main circuit conductors, and the moving contact assembly is part of the main circuit conductors; a first trip is provided in at least one pole space, and the latch assembly has a first trigger portion corresponding to the first trip; when the main circuit conductor is overloaded and / or short-circuited, the first trip drives the first trigger portion to release the latch assembly from the first locking portion, and the operating mechanism switches to a tripped state under the action of a mechanism spring. In some embodiments of the present application, a mounting bracket is further included, the first trip is provided on the mounting bracket, the latch assembly is provided on the mounting bracket, and the first trip and latch assembly are installed in the inner cavity via the mounting bracket.

[0021] In some embodiments of the present application, the first release is a hydraulic electromagnetic release, which includes a solenoid, an oil cup, an iron core, an iron core reset spring and an armature reset spring; the solenoid is wrapped around the outside of the oil cup, and the solenoid is part of the main circuit conductor; the iron core and the iron core reset spring are inside the oil cup; the oil cup has a pole shoe at one end close to the armature, and the armature is arranged to rotate; when the main circuit conductor is overloaded or short-circuited, the iron core moves toward the pole shoe so that the pole shoe attracts the armature to rotate, and the armature pushes the first trigger part to rotate; the armature reset spring is used to drive the armature to reset after rotation, and the iron core reset spring is used to drive the iron core to reset after movement.

[0022] In some embodiments of the present application, the inner cavity includes at least one pole space, each pole space corresponds to a set of main circuit conductors, and the moving contact assembly is part of the main circuit conductor; a second release is provided in at least one pole space, and the lock assembly has a second trigger portion corresponding to the second release; the second release is actuated upon receiving a drive signal, driving the second trigger portion to release the lock assembly from the first locking portion, and the operating mechanism switches to the trip state under the action of the mechanism spring. In some embodiments of the present application, an external handle assembly is also included, the external handle assembly has an operating member, the operating member is linked to the first end of the drive shaft, and the operating member is operated by the user; the periphery of the operating member has status marks corresponding to the three states of the operating mechanism, and different status marks are indicated by rotating the operating member.

[0023] In some embodiments of the present application, an external handle assembly is also included. The external handle assembly has an operating member and an inner lining. The operating member is linked to the first end of the drive shaft, and the operating member is for the user to operate; the inner lining is a statically set component and has a padlock groove, and the operating member has a padlock hole; when the padlock hole is connected to the padlock groove, it can be padlocked.

[0024] In some embodiments of the present application, an insert nut is embedded in the housing, and the drive shaft penetrates the insert nut.

[0025] In some embodiments of the present application, the lock assembly includes a first lock member, a second lock member, and a lock spring; the first lock member is rotatably disposed relative to the housing about a fifth axis, and the second lock member is rotatably disposed relative to the housing about a sixth axis, the fifth axis and the sixth axis being both parallel to the second direction; the first lock member has a second locking portion and a third locking portion, and the second lock member has a fourth locking portion; in the first direction, the fifth axis is higher than the sixth axis, the first locking portion and the second locking portion are both located between the fifth axis and the sixth axis, and the third locking portion and the fourth locking portion are both located below the second locking portion; the lock spring is connected between the first lock member and the second lock member to provide a biasing force when the lock assembly transitions to a locked state; when the lock assembly is in the locked state, the first locking portion abuts against the second locking portion, and the third locking portion abuts against the fourth locking portion; when the lock assembly is in the unlocked state, the first locking portion is released from abutment with the second locking portion, the third locking portion is released from abutment with the fourth locking portion, the rotating member blocks one side of the first lock member to restrict the lock assembly from transitioning to the locked state, and the lock spring is in a stored energy state to provide a spring force for transitioning to the locked state.

[0026] In some embodiments of the present application, the first locking member has an avoidance portion, which is connected to the third locking portion in the first direction and is located above the third locking portion; when the locking assembly is in an unlocked state, the fourth locking portion is located in the avoidance portion.

[0027] In some embodiments of the present application, the locking spring includes a first abutting end and a second abutting end, the first abutting end abuts against the first locking member, and the second abutting end abuts against the first locking member, and the first abutting end and the second abutting end are always located below the sixth axis.

[0028] In some embodiments of the present application, the first locking member has a first spring mounting portion, the second locking member has a second spring mounting portion, and both ends of the locking spring are respectively connected to the first spring mounting portion and the second spring mounting portion.

[0029] In some embodiments of the present application, a mounting bracket is provided in the inner cavity, and the first locking member and the second locking member are both rotatable relative to the outer shell through the mounting bracket.

[0030] The beneficial effects of this application include:

[0031] First, the above-mentioned mechanism has three states, and the position of the inner handle can be fed back to the drive shaft through the linkage between the inner handle and the drive shaft. Secondly, the above-mentioned circuit breaker has an inner cavity in the housing. Except for the first end of the drive shaft (the first end is external for connection to the external handle), the remaining components of the mechanism are directly arranged in the inner cavity. Compared with the mechanism of a traditional small circuit breaker (which is arranged inside the housing of the small circuit breaker, and the small circuit breaker is then arranged in the inner cavity of the explosion-proof cover), this mechanism is equivalent to being directly arranged in the inner cavity of the explosion-proof cover. This allows for a larger design space for the operating mechanism and can meet higher performance requirements (originally limited by the housing of the small circuit breaker itself, the performance of the circuit breaker was very limited). Thirdly, such a mechanism is equivalent to directly incorporating the moving contact assembly into a part of the operating mechanism (that is, the moving contact assembly is connected to the rotating part through the mechanism spring. If the moving contact assembly is missing, this operating mechanism cannot achieve opening and closing operations by relying solely on the remaining parts). This is completely different from the traditional molded case circuit breaker (in the traditional molded case circuit breaker, the output end of the operating mechanism is connected to the moving contact assembly to achieve opening and closing. If the moving contact assembly is removed, the operating mechanism itself can also achieve opening and closing operations normally). Finally, the operating mechanism structure of the above structure is very streamlined and can be directly installed in the inner cavity, which can effectively meet the performance requirements of the explosion-proof circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0033] Figure 1Schematic diagram showing the operating mechanism of the circuit breaker (2 poles) in Example 1 of the present application

[0034] Figure 2 A schematic diagram of the operating mechanism (closing) of the circuit breaker (2 poles) in Example 1 of the present application is shown;

[0035] Figure 3 A schematic diagram of the operating mechanism (opening and resetting of the lock assembly) of the circuit breaker (2-pole) in Example 1 of the present application is shown;

[0036] Figure 4 A schematic diagram of the operating mechanism (tripping) of the circuit breaker (2-pole) in Example 1 of the present application is shown;

[0037] Figure 5 A schematic diagram showing a drive shaft and a drive portion in an operating mechanism of a circuit breaker according to embodiment 1 of the present application is shown;

[0038] Figure 6 A schematic diagram of the inner handle of the circuit breaker (2-pole) according to Example 1 of the present application is shown;

[0039] Figure 7 A schematic diagram of a rotating part of a circuit breaker (2 poles) according to Example 1 of the present application is shown;

[0040] Figure 8 A schematic diagram showing the moving contact assembly and mechanism spring of the circuit breaker in Example 1 of the present application is shown;

[0041] Figure 9 A schematic diagram showing the coordination of the moving contact assembly, mechanism spring, and rotating member of the circuit breaker in Example 1 of the present application is shown;

[0042] Figure 10 A schematic diagram showing the coordination of the moving contact assembly and the inner handle of the circuit breaker in Example 1 of the present application is shown;

[0043] Figure 11 A schematic diagram showing a rotating member and a locking assembly of a circuit breaker in embodiment 1 of the present application in a locked state is shown;

[0044] Figure 12 A schematic diagram showing the rotating member and the lock assembly of the circuit breaker in Example 1 of the present application in an unlocked state is shown;

[0045] Figure 13 A schematic diagram of a second locking member of a circuit breaker (2 poles) in embodiment 1 of the present application is shown;

[0046] Figure 14 A schematic diagram of a first locking member of a circuit breaker (2-pole) in Example 1 of the present application is shown;

[0047] Figure 15 An exploded view of a circuit breaker (2 poles) according to Example 1 of the present application is shown;

[0048] Figure 16 A schematic diagram showing the rotating member, the locking assembly and the inner handle of the circuit breaker in Example 1 of the present application when in a locked state is shown;

[0049] Figure 17 A schematic diagram showing the inner handle of the circuit breaker in Example 1 of the present application driving the rotating member and the lock assembly to restore to the locked state;

[0050] Figure 18 A schematic diagram showing a mounting bracket, a first trip unit, a second trip unit, and a locking assembly of a circuit breaker (2-pole) according to Example 1 of the present application is shown;

[0051] Figure 19 A schematic diagram of a second trip unit and a locking assembly of a circuit breaker according to embodiment 1 of the present application is shown;

[0052] Figure 20 A schematic diagram of a first trip unit and a locking assembly of a circuit breaker according to embodiment 1 of the present application is shown;

[0053] Figure 21 A schematic diagram showing a first trip unit of a circuit breaker in embodiment 1 of the present application when not actuated is shown;

[0054] Figure 22 A schematic diagram of a cover of a circuit breaker (2 poles) according to Example 1 of the present application is shown;

[0055] Figure 23 A cross-sectional view of the inner handle and the rotating connection of the rotating member of the circuit breaker (1 pole) in Example 1 of the present application is shown;

[0056] Figure 24 An exploded view of a circuit breaker (4 poles) according to Example 1 of the present application is shown;

[0057] Figure 25 A schematic diagram of a cover of a circuit breaker (4 poles) according to Example 1 of the present application is shown;

[0058] Figure 26 A schematic diagram of a circuit breaker (4 poles) and an external handle assembly according to Example 1 of the present application is shown;

[0059] Figure 27 An exploded view of the external handle assembly of Example 1 of the present application is shown. DETAILED DESCRIPTION

[0060] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] Furthermore, the terms "primary" and "secondary" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature designated "primary" or "secondary" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0063] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0064] In this application, unless otherwise expressly specified or limited, when a main feature is "above" or "below" a second feature, it can mean that the main feature and the second feature are in direct contact, or that the main feature and the second feature are in indirect contact through an intermediate medium. Furthermore, when a main feature is "above," "above," or "above" a second feature, it can mean that the main feature is directly above or diagonally above the second feature, or simply means that the main feature is higher in level than the second feature. When a main feature is "below," "below," or "below" a second feature, it can mean that the main feature is directly below or diagonally below the second feature, or simply means that the main feature is lower in level than the second feature. Example

[0065] like Figure 1-Figure 27 As shown, embodiment 1 of the present application provides a circuit breaker, including the following structure:

[0066] The operating mechanism includes a driving shaft 110 , a driving portion 120 , an inner handle 130 , a rotating member 140 , a locking assembly 150 , a moving contact assembly 160 and a mechanism spring 170 .

[0067] The housing has an inner cavity 201 , and all components of the operating mechanism except the drive shaft 110 are located in the inner cavity 201 .

[0068] The drive shaft 110 has a first end exposed outside the housing for operation, and a second end located within the inner cavity 201. Here, the drive shaft 110 is rotatable relative to the housing about a first axis P1, which is parallel to the first direction H. An insert nut 111 is embedded in the housing. The drive shaft 110 extends through the insert nut 111, with the first end exposed outside the housing and the other end located within the inner cavity 201. This design of the insert nut 111 improves the sealing performance of the drive shaft 110, making it more suitable for explosion-proof circuit breakers.

[0069] Here, the first end of the drive shaft 110 is used to cooperate with the external handle assembly 180, so that the user can operate the drive shaft 110 through the external handle assembly 180, and can also use the external handle assembly 180 to determine the status of the circuit breaker (for example, when tripping, the drive shaft 110 will also drive the external handle assembly 180 to rotate).

[0070] The external handle assembly 180 includes an operating member 181, which is a handle for the user to operate. The operating member 181 is interlocked with the drive shaft 110. The interlocking arrangement here can be direct, for example, the operating member 181 is directly fixed to the first end of the drive shaft 110; or it can be indirect (also an embodiment of the present application), where the operating member 181 is engaged with a sleeve assembly 182, which is sleeved on the first end of the drive shaft 110. The operating member 181 is interlocked with the drive shaft 110 through the sleeve assembly 182. Here, the sleeve assembly 182 is composed of three components that interlock in sequence (interlocking in a direction perpendicular to the first axis P1); of course, fewer components can be interlocked (for example, two components), more components can be interlocked (for example, four components), or it can be directly one component (the sleeve assembly 182 is an integral piece).

[0071] Around the perimeter of the operating member 181 are status indicators corresponding to the three states of the operating mechanism: closed, open, and tripped (not shown). These three indicators correspond to the three states of the operating mechanism, and the different status indicators are indicated by rotating the operating member 181. This allows the user to determine the state of the operating mechanism (or, more accurately, the state of the circuit breaker) based on these indicators.

[0072] The status indicator here can be set on the housing or on the external handle assembly 180 (on the panel of the external handle assembly 180, the operating member 181 is rotated relative to the panel).

[0073] The operating member 181 rotates around the inner lining 183, and the sleeve assembly 182 is also located within the inner lining 183. The operating member 181 has a padlock hole 184, and the inner lining 183 has a padlock slot 185. When the padlock hole 184 and the padlock slot 185 are connected, they can be padlocked. The specific padlock positions here can be closed, open, or locked. Of course, this does not necessarily mean that the external handle assembly must have all three padlock positions simultaneously; for example, only one or two of these positions are also possible.

[0074] The driving part 120 forms a synchronous motion with the second end of the driving shaft 110, and the position of the driving part 120 deviates from the first axis P1. Here, the driving part 120 is a shaft, and the driving part 120 is fixed on the mounting plate 121, and the mounting plate 121 is fixed to the second end of the driving shaft 110. The driving part 120 here makes an eccentric motion about the first axis P1. The driving part 120 here is inserted into the hole of the inner handle 130, so that the driving shaft 110 drives the inner handle 130 to rotate. Of course, the driving part 120 and the mounting plate 121 here can be an integrally formed component. In addition to the shaft, the driving part 120 here can also be changed to a fork, which is sleeved on the outside of the inner handle 130, so that the driving shaft 110 drives the inner handle 130 to rotate.

[0075] The inner handle 130 is rotatably arranged with the outer shell around the second axis P2. The second axis P2 here is parallel to the second direction D. The inner handle 130 forms a linkage with the drive unit 120. From the first direction H, the linkage position is located above the second axis P2. In this way, when the drive shaft 110 rotates about the first axis P1, the drive unit 120 can drive the inner handle 130 to rotate about the second axis P2; when the inner handle 130 rotates about the second axis P2, the drive unit 120 can drive the drive shaft 110 to rotate about the first axis P1. The inner handle 130 here has three positions, namely the closing position N, the opening position F, and the tripping position T, which correspond to the closing state, the opening state, and the tripping state of the operating mechanism, respectively.

[0076] The movable contact assembly 160 has one end hinged to the inner handle 130, and the other end serves as a movable contact (mates with the stationary contact 165). The axis of the hinge P4 of the movable contact assembly 160 is parallel to the second direction D, and the hinge P4 rotates with the inner handle 130. In other words, as the inner handle 130 rotates about the second axis P2, the position of the hinge P4 also changes (following the movement of the inner handle 130). Regardless of the position of the hinge P4, in the first direction H, the hinge P4 remains between the second axis P2 and the third axis P3.

[0077] The latch assembly 150 has a locked state, in which it is locked with the first locking portion 141, and an unlocked state, in which it is released from the first locking portion 141. That is, when the latch assembly 150 is in the locked state, it is locked with the first locking portion 141; when the latch assembly is in the unlocked state, it is unlocked from the first locking portion 141. When the inner handle 130 is in the closed position N or the open position F, the latch assembly 150 is in the locked state, that is, locked with the first locking portion 141. Only when the inner handle 130 is in the tripped position T is the latch assembly 150 in the unlocked state, that is, unlocked from the first locking portion 141.

[0078] The rotating member 140 is rotatable relative to the housing about a third axis P3. The third axis P3 is parallel to the second direction D. The rotating member 140 includes a first locking portion 141 and a reset portion 142. The first locking portion 141 is used to lock or unlock the latch assembly 150. The reset portion 142 is used to reset the latch assembly 150 (to the locked state). Specifically, the reset portion 142 is located on the side of the inner handle 130 that moves toward the trip position. When the inner handle 130 is in the trip position T, after the inner handle 130 is driven toward the trip position F (actually, by rotating the drive shaft 110, causing the inner handle 130 to move), the inner handle 130 pushes the reset portion 142, causing the rotating member 140 to rotate, thereby re-locking the first locking portion 141 with the latch assembly 150. This re-locking can occur either immediately upon the inner handle 130 reaching the trip position F or immediately upon reaching the trip position F.

[0079] The mechanism spring 170, connected between the moving contact assembly 160 and the rotating member 140, provides the spring force needed to switch the operating mechanism. When the operating mechanism is in the closed state, the mechanism spring 170 is in a stored energy state, and the operating mechanism maintains a steady state due to the locking action of the latch assembly 150 and the first locking portion 141. When the latch assembly 150 is actuated, this steady state is broken, and the operating mechanism switches to the tripped state under the action of the mechanism spring 170. The mechanism spring 170 enables rapid switching between the open and closed states. When the operating mechanism is in the closed state (at this time the lock assembly 150 and the first locking part 141 are locked), the external force causes the drive shaft 110 to rotate in the opening direction. Since the hinge P4 between the inner handle 130 and the moving contact assembly 160 is changing (as the inner handle 130 rotates), the mechanism spring 170 gradually deforms and crosses the critical point (also called the dead point). After crossing the critical point, the mechanism spring 170 accelerates the rotation of the moving contact assembly 160 and the inner handle 130, so that the operating mechanism quickly reaches the opening state (the moving contact assembly 160 and the static contact 165 are completely separated). Similarly, when the operating mechanism is in the open state (at which point the latch assembly 150 and the first locking portion 141 are also locked), an external force causes the drive shaft 110 to rotate in the closing direction. As the hinge P4 between the inner handle 130 and the moving contact assembly 160 changes (as the inner handle 130 rotates), the mechanism spring 170 gradually deforms past a critical point (also called a dead point). After crossing the critical point, the mechanism spring 170 accelerates the rotation of the moving contact assembly 160 and the inner handle 130, causing the operating mechanism to quickly reach the closed state (where the moving contact assembly 160 contacts the static contact 165). To protect the mechanism spring 170 from arc erosion, an insulating sleeve 171 is provided over the mechanism spring 170.

[0080] The first direction mentioned above is the height direction H of the inner cavity 201 , and the second direction is the width direction D of the inner cavity 201 , and the two directions are perpendicular to each other.

[0081] Through the above-described structural design, the operating mechanism has three states, and the tripped state can be used to alert the user that the circuit breaker has tripped due to a line fault. With this operating mechanism, essentially all components are located within the inner cavity 201 (even the drive shaft 110, with only the first end 110a absent). Compared to the mechanism of a traditional miniature circuit breaker (which is located within the miniature circuit breaker housing, which is then located within the inner cavity 201 of the explosion-proof enclosure), this mechanism is equivalent to being located directly within the inner cavity 201 of the explosion-proof enclosure. This allows for greater design space for the operating mechanism, enabling it to meet higher performance requirements (previously, circuit breaker performance was severely limited by the limitations of the miniature circuit breaker housing itself). Such a mechanism is equivalent to directly incorporating the moving contact assembly 160 into a part of the operating mechanism (that is, the moving contact assembly 160 is connected to the rotating member 140 via the mechanism spring 170. If the moving contact assembly 160 is missing, this operating mechanism cannot achieve opening and closing operations relying solely on the remaining parts). This is completely different from a traditional molded case circuit breaker (in a traditional molded case circuit breaker, the output end of the operating mechanism is connected to the moving contact assembly 160 to achieve opening and closing. If the moving contact assembly 160 is removed, the operating mechanism itself can also achieve opening and closing operations normally). Finally, the operating mechanism structure of the above structure is very streamlined and can be directly installed in the inner cavity 201, which can effectively meet the performance requirements of an explosion-proof circuit breaker.

[0082] A preferred locking assembly 150 includes a first locking member 151, a second locking member 152, and a locking spring 153. Here, the first locking member 151 is rotatably disposed relative to the housing about a fifth axis P5, and the second locking member 152 is rotatably disposed relative to the housing about a sixth axis P6. Both the fifth axis P5 and the sixth axis P6 are parallel to the second direction D.

[0083] The first locking member 151 has a second locking portion 151a and a third locking portion 151b, and the second locking member 152 has a fourth locking portion 152a. In the first direction H, the fifth axis P5 is higher than the sixth axis P6. The first locking portion 141 and the second locking portion 151a are both located between the fifth axis P5 and the sixth axis P6. The third locking portion 151b and the fourth locking portion 152a are both located below the second locking portion 151a. When the locking assembly 150 is in the locked state, the first locking portion 141 abuts against the second locking portion 151a, and the third locking portion 151b abuts against the fourth locking portion 152a. When the lock assembly 150 is in the unlocked state, the first locking portion 141 and the second locking portion 151a are released from contact, and the third locking portion 151b and the fourth locking portion 152a are released from contact. The rotating member 140 blocks the first locking member 151, preventing the lock assembly 150 from transitioning to the locked state. The lock spring 153 is in a stored energy state, providing the spring force that enables the lock assembly 150 to transition to the locked state. The first locking portion 141 and the second locking portion 151a at the top are both raised, the third locking portion 151b is flat, and the fourth locking portion 152a is raised.

[0084] The locking spring 153 is connected between the first locking member 151 and the second locking member 152 to provide a biasing force when the locking assembly 150 is transformed into a locked state.

[0085] This structure achieves locking or unlocking by forming abutments or releasing abutments (or overlapping or releasing overlaps) between the aforementioned locking portions, thus featuring a simple locking structure. The locking spring 153 ensures that the return portion 142 drives the rotational member 140. As the rotational member 140 gradually disengages from the obstruction of the locking assembly 150, the locking spring 153 causes the first locking member 151 to rotate, causing the first locking portion 141 to abut against the second locking portion 151a, and the third locking portion 151b to abut against the fourth locking portion 152a (i.e., returning the locking assembly 150 to the locked state).

[0086] The first locking member 151 has a relief portion 151c. Here, the relief portion 151c is a through hole, though it can also be a groove (sufficient to accommodate the fourth locking portion 152a). The relief portion 151c is designed so that when the locking assembly 150 is unlocked, the fourth locking portion 152a is located within the relief portion 151c. In the first direction H, the relief portion 151c is connected to the third locking portion 151b, which facilitates the movement of the fourth locking portion 152a (both allowing the fourth locking portion 152a to enter the relief portion 151c and release its contact with the third locking portion 151b, and also allowing the fourth locking portion 152a to move out of the relief portion 151c and contact the third locking portion 151b).

[0087] The locking spring 153 is preferably a compression spring comprising a first abutting end and a second abutting end. The first abutting end abuts the first locking member 151, and the second abutting end abuts the first locking member 151. The first and second abutting ends are always located below the sixth axis P6. Alternatively, the locking spring 153 can be a leaf spring or a torsion spring, similarly having a first abutting end and a second abutting end. This arrangement of the first and second abutting ends always being located below the sixth axis P6 facilitates the reset of the first locking member 151 (i.e., re-locking).

[0088] Similarly, the first locking member 151 has a first spring mounting portion 151d, and the second locking member 152 has a second spring mounting portion 152b. The two ends of the locking spring 153 are respectively connected to the first spring mounting portion 151d and the second spring mounting portion 152b. The first spring mounting portion 151d and the second spring mounting portion 152b are provided in different forms depending on the specific type of spring, as long as they can ensure that the two abutting ends of the locking spring 153 are limited. For example, in the case of a compression spring, the first spring mounting portion 151d and the second spring mounting portion 152b are provided in the form of positioning columns. For example, in the case of a torsion spring or a spring leaf, the first spring mounting portion 151d and the second spring mounting portion 152b are provided in the form of a positioning column. For example, in the case of a torsion spring or a spring leaf, the first spring mounting portion 151d and the second spring mounting portion 152b are provided in the form of a positioning groove. The positioning groove will facilitate the stable installation of the torsion spring or the spring leaf.

[0089] The first and second locking members 151, 152 are pivotally mounted on a mounting bracket 308, which is disposed within the inner cavity 201. Specifically, the first locking member 151 has a fifth rotation axis S5 (whose axis is the fifth axis P5), which is pivotally mounted on the mounting bracket 308 via the fifth rotation axis S5, thereby enabling rotation relative to the outer shell. The second locking member 152 has a sixth rotation axis S6 (whose axis is the sixth axis P6), which is pivotally mounted on the mounting bracket 308 via the sixth rotation axis S6, thereby enabling rotation relative to the outer shell. Of course, the fifth and sixth rotation axes S5, S6 described above can be independent shafts or cylindrical protrusions directly formed on the first and second locking members 151, 152. This structure allows the mounting bracket 308 to be installed within the inner cavity 201 after the first and second locking members 151, 152 are assembled with the mounting bracket 308. This allows for modular assembly of the operating mechanism, facilitating product assembly.

[0090] As for the housing, it includes a cover 200 , a bottom plate 202 , a first support member 203 and a second support member 204 .

[0091] The inner cavity 201 is provided on the housing 200. The bottom of the housing 200 has an opening for the inner cavity 201. The bottom plate 202 is fixed to the housing 200 to close the opening of the inner cavity 201. All components inside the circuit breaker are loaded into the inner cavity 201 through the opening of the inner cavity 201.

[0092] Here, the first support member 203 and the wall of the inner cavity 201 together limit the inner handle 130. The limitation here refers to the limitation in terms of rotation, thereby forming a rotation setting of the inner handle 130 and the outer shell. Specifically, a first arc groove 203a is provided on the first support member 203, and a second arc groove 201a is provided on the inner cavity wall. The inner handle 130 has a portion that fits with the first arc groove 203a and a portion that fits with the second arc groove 201a. The notches of the first arc groove 203a and the second arc groove 201a are completely opposite. In the first direction H, the first arc groove 203a is located below the second arc groove 201a, so that the inner handle 130 forms a rotation connection through this limitation. Here, the first arc groove 203a and the second arc groove 201a can be as follows Figure 23 As shown in FIG. 2 , the second arc-shaped groove 201a is not misaligned in the second direction D (ie, the second arc-shaped groove 201a is located directly above the first arc-shaped groove 203a). Figure 15 、 24 -25 is misaligned (not directly above, but the second arc groove 201a is higher than the first arc groove 203a). Regardless of which method is used, the rotation connection of the inner handle 130 can be achieved.

[0093] Here, the second support member 204 and the wall of the inner cavity 201 together limit the rotating member 140. The limitation here refers to the limitation in terms of rotation, thereby forming a rotation setting of the rotating member 140 and the outer shell. Specifically, a third arc groove 204a is provided on the second support member 204, and a fourth arc groove 201b is provided on the inner cavity wall. The rotating member 140 has a portion that fits with the third arc groove 204a and a portion that fits with the fourth arc groove 201b. The notches of the third arc groove 204a and the fourth arc groove 201b are completely opposite. The third arc groove 204a is located below the fourth arc groove 201b in the first direction H, so that the rotating member 140 forms a rotation connection through this limitation. Here, the third arc groove 204a and the fourth arc groove 201b can be as follows Figure 15 、 22 23 are not misaligned in the second direction D (ie, the fourth arc-shaped groove 201b is located directly above the third arc-shaped groove 204a), and may also be misaligned.

[0094] The portion of the inner handle 130 that mates with the first and second arcuate grooves 203a, 201a may be integrally formed on the inner handle 130 or may utilize independent pins. Similarly, the portion of the rotating member 140 that mates with the third and fourth arcuate grooves 204a, 201b may be integrally formed on the rotating member 140 or may utilize independent pins.

[0095] The above-mentioned first support member 203 and second support member 204 can be arranged in such a manner that they are integrally formed with the base plate 202; one of them can be integrally formed with the base plate 202, and the other can be an independently formed member (fixed to the base plate 202 or the cover shell 200 by means of screws, snap-fits, interference fits, plug-ins, etc.); both can be independently formed members (fixed to the base plate 202 or the cover shell 200 by means of screws, snap-fits, interference fits, plug-ins, etc.); or the first support member 203 and the second support member 204 can be an integral member (fixed to the base plate 202 or the cover shell 200 by means of screws, snap-fits, interference fits, plug-ins, etc.).

[0096] Regardless of which method is used, the above structure can effectively form a rotational connection between the inner handle 130 and the rotating member 140 relative to the outer shell, and has the effects of simple structure and easy assembly.

[0097] The inner cavity 201 of the housing is divided into at least one pole space 2010, where the number of pole spaces 2010 is determined by the number of poles of the circuit breaker. When there is only one pole space 2010, the pole space 2010 is equivalent to the inner cavity 201, and the circuit breaker is a one-pole circuit breaker. When there are two pole spaces 2010, there are two pole spaces 2010 (both pole spaces 2010 are part of the inner cavity 201), and the circuit breaker is a two-pole circuit breaker. Similarly, the three-pole, four-pole and two-pole circuit breakers are relatively similar and will not be discussed here. For circuit breakers with more than two poles, the pole spaces 2010 are separated by phase partitions through the inner cavity 201. The phase partitions are composed of the inner cavity 201 wall, the first support member 203, and the second support member 204.

[0098] Each pole space 2010 corresponds to a group of moving contact assemblies 160 and static contacts 165. In this embodiment, the moving contact assembly 160 is an integrally formed component. One end of the moving contact assembly 160 is a contact end 161, which is used to make contact or separate with the static contact 165; the other end of the moving contact assembly 160 is a mounting end, which is used to form a hinge with the inner handle 130. The mounting end here includes two arms 162 that are separately set. In addition to using a structure other than two arms 162, the mounting end here can also use a single arm 162. In addition, the moving contact assembly 160 can also be composed of two components. For example, the mounting end is an independent component (conductive material or plastic material can be used), and the contact end 161 is another component (conductive material), and the two are fixed together by riveting, screw fastening, etc.

[0099] Here, the inner handle 130 has a contact mounting portion 130a. The number of contact mounting portions 130a corresponds one-to-one with the number of contact spaces 2010, and they are located in the corresponding contact spaces 2010. This is because each contact space 2010 contains a set of movable contact assemblies 160 and a set of mechanism springs 170. Each contact mounting portion 130a has a mounting cavity 130b. This is an open chamber that allows the mounting end of the movable contact assembly 160 to extend into the mounting cavity 130b. The walls of the mounting cavity 130b are provided with two mounting grooves 130c. The end of the movable contact assembly 160 that extends into the mounting cavity 130b has two contact shafts 163 (integrally formed with the two arms 162). These shafts 163 extend into the two mounting slots 130c, forming a hinged connection (i.e., a hinged connection between the inner handle 130 and the movable contact assembly 160). As the inner handle 130 rotates about the second axis P2, the shafts 163, pushed by the walls of the mounting slots 130c, also rotate about the second axis P2. Alternatively, the two contact shafts 163 may be hinged to the mounting slots 130c using a separate pin extending through the arms 162.

[0100] The above-mentioned mounting groove 130c and hinge structure design are very simple in structure, and only one end of the moving contact assembly 160 needs to be inserted into the mounting cavity 130b for assembly.

[0101] Here, the rotating member 140 has rotating sub-sections 140a. The number of rotating sub-sections 140a corresponds one-to-one with the number of pole spaces 2010, and they are arranged in the corresponding pole spaces 2010. This is because each movable contact assembly 160 in each pole space 2010 corresponds to a set of mechanism springs 170. One end of the mechanism spring 170 is connected to the movable contact assembly 160, and the other end is connected to the rotating sub-section 140a. Here, the mechanism spring 170 is a tension spring, one end of which is connected to the first suspension portion 164 on the movable contact assembly 160, and the other end is connected to the second suspension portion 140b on the rotating sub-section 140a. Of course, the mechanism spring 170 here can also be a spring of other spring type, simply by adapting the corresponding matching structure.

[0102] The first hanging portion 164 here is formed by partially bending the moving contact assembly 160. Of course, an independently formed component can also be used here, which is fixed to the moving contact assembly 160 by screws, rivets, or interference fit, or the first hanging portion 164 is a riveted shaft riveted to the moving contact assembly 160, or a fastening screw.

[0103] The second hanging portion 140b here is a rod, and the rod is set on the rotating sub-portion 140a. Here, a slot 140a1 is opened in the rotating sub-portion 140a, and the second hanging portion 140b is located in the slot 140a1. Because the second hanging portion 140b is hooked by the mechanism spring 170, the mechanism spring 170 applies a force to the second hanging portion 140b away from the notch of the slot 140a1, which can prevent the second hanging portion 140b from falling off easily and ensure the stable setting of the second hanging portion 140b. A shallow groove can be opened on the surface of the second hanging portion 140b here to slightly limit the hanging part of the mechanism spring 170.

[0104] The arrangement of the rotating sub-section 140a, the mechanism spring 170, and the moving contact assembly 160 facilitates connecting each moving contact assembly 160 to the rotating member 140 via the mechanism spring 170, ensuring that each moving contact assembly 160 has a spring configuration (to ensure final pressure) while also ensuring sufficient spring force in the mechanism. The use of a tension spring, the first suspension portion 164, and the second suspension portion 140b, among other structures, offers a simple and convenient installation structure. Furthermore, the spring force of the tension spring is relatively easy to calculate, making its use as the mechanism spring 170 a preferred solution. The mechanism spring 170 can store and release energy during the switching process between the open and closed states, accelerating the mechanism's movement. This has been described in detail above and will not be repeated here.

[0105] There are many types of trippers that can trigger the lock assembly 150 (to release the lock from the first locking portion 141). Depending on the source of the trigger signal, one type is the first tripper, and the other type is the second tripper 400.

[0106] The first release is directly connected to the main circuit conductor (each pole space 2010 has a set of main circuit conductors, and the moving contact assembly 160 and the static contact 165 are both part of the main circuit conductor). It is caused by the overcurrent in the main circuit and directly triggers the locking assembly 150. This type of release is usually used to achieve overload protection and / or short-circuit protection. Conventional first releases of this type include thermal magnetic releases and hydraulic electromagnetic releases.

[0107] This type of trip unit is placed in at least one pole space 2010. For a single-pole circuit breaker, the pole space 2010 is equipped with a first trip unit. For a multi-pole circuit breaker, placing the first trip unit in the pole spaces 2010 corresponding to all P-pole main circuit conductors is beneficial for line protection.

[0108] The first locking member 151 has a first triggering portion 151 e that cooperates with the first release. When the first release is actuated, the first triggering portion 151 e is triggered, causing the locking assembly 150 to release the lock from the first locking portion 141.

[0109] Taking a hydraulic electromagnetic release as an example, it includes a solenoid 300, an oil cup 301, an iron core, an iron core return spring, an armature 305, and an armature return spring 304. The oil cup 301 contains oil (such as silicone oil), an iron core, and an iron core return spring. The solenoid 300 surrounds the oil cup 301 and serves as part of the main circuit conductor. One end of the oil cup 301 is connected to a pole piece 306, and the armature 305 is rotatably mounted on a yoke 307. The yoke 307 is positioned around the solenoid 300 and other components. The armature return spring 304 is connected to the yoke 307 at one end and to the armature 305 at the other. When the main circuit is overloaded or short-circuited, the iron core moves toward the pole shoe 306 (stretching the iron core return spring). This attracts the armature 305, causing it to rotate (deforming the armature return spring 304). The armature 305 then pushes the first triggering portion 151e to rotate, causing the operating mechanism to trip. Subsequently, the armature return spring 304 resets the armature 305, and the iron core return spring resets the iron core. This hydraulic electromagnetic release is suitable for smaller spaces.

[0110] The hydraulic electromagnetic release is mounted on a mounting bracket 308, which is the same bracket as the mounting bracket 308 associated with the latch assembly 150. This mounting bracket 308 allows all of these structures to be mounted on the mounting bracket 308, facilitating assembly.

[0111] For the thermal-magnetic release, in addition to the armature 305, it also has a bimetallic strip. It only needs to make adaptive modifications to the first locking member 151. For example, the first trigger part 151e of the first locking member 151 is set to two, one of which cooperates with the armature 305 and the other cooperates with the bimetallic strip. No further details are given here.

[0112] Second trip unit 400. This type of trip unit comes in many varieties, including leakage current trip units, shunt trip units, overvoltage trip units, undervoltage trip units, and over / undervoltage trip units. They all share a common characteristic: they are all voltage-driven. This means that a drive signal energizes and triggers the trip unit. However, the signal sources vary depending on the type of trip unit. For example, the drive signal for a leakage current trip unit originates from the leakage protection circuit, the drive signal for a shunt trip unit originates from a host computer, and the drive signal for overvoltage trip units, undervoltage trip units, and over / undervoltage trip units originates from the over / undervoltage protection circuit. The specific methods for generating these drive signals are well known in the art and will not be elaborated upon here.

[0113] The second release 400 is installed in the pole space 2010. For a single-pole circuit breaker, it has only one second release 400. For a multi-pole circuit breaker, it can have only one second release 400 (installed in only one pole space 2010), or multiple second releases 400 (installed in multiple pole spaces 2010). Multiple second releases 400 can be of different types, for example, a residual current release and a shunt release if there are two, or a residual current release, a shunt release, and an overvoltage or undervoltage release if there are three. Of course, there are many different types of releases, and we will not list them all here.

[0114] The first latch 151 has second triggering portions 151f. The number of second triggering portions 151f is the same as the number of second releases 400, and they correspond one to one. When any second release 400 is triggered (receives its required drive signal), the top rod of the second release 400 extends and triggers the corresponding second triggering portion 151f, causing the latch assembly 150 to release the lock from the first locking portion 141, thereby tripping the operating mechanism.

[0115] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0116] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A circuit breaker, characterized in that: include, a housing having an inner cavity; The operating mechanism includes a drive shaft and a drive portion disposed in the inner cavity, an inner handle, a rotating member, a locking assembly, a moving contact assembly, and a mechanism spring; A drive shaft is rotatably disposed with the housing around a first axis, the first axis being parallel to the first direction, a first end of the drive shaft being exposed outside the housing for operation, and a second end being located in the inner cavity; a driving portion, wherein the driving portion and the second end of the driving shaft form a synchronous motion, and the position of the driving portion is offset from the first axis; The inner handle is rotatably arranged with the outer shell around a second axis, the second axis is parallel to the second direction, the inner handle forms a linkage with the drive portion, and the linkage position is located above the second axis in the first direction; the inner handle has a closed position corresponding to the operating mechanism being in a closed state, a tripped position corresponding to the operating mechanism being in a tripped state, and an open position corresponding to the operating mechanism being in an open state, and the tripped position is between the closed position and the open position; a moving contact assembly, one end of the moving contact assembly being hinged to the inner handle, the axis of the hinge being parallel to the second direction, and the hinge rotating along with the inner handle; The lock catch assembly has a locked state in which it is locked with the first locking portion and an unlocked state in which it is unlocked with the first locking portion; when the inner handle is in the closing position and the opening position, the lock catch assembly is in the locked state; when the inner handle is in the tripping position, the lock catch assembly is in the unlocked state; The rotating member is rotatably arranged with the housing around a third axis, the third axis being parallel to the second direction, and the rotating member includes a first locking portion and a reset portion; the reset portion is located on a side of the inner handle moving in the opening direction, and when the inner handle is in the trip position, when the inner handle is driven to move toward the opening position, the inner handle pushes the reset portion to rotate the rotating member, thereby re-locking the first locking portion and the lock assembly; A mechanism spring is connected between the moving contact assembly and the rotating member to provide a spring force for switching the state of the operating mechanism. When the operating mechanism is in the closed state, the mechanism spring is in an energy storage state, and the operating mechanism maintains a steady state under the locking action of the lock assembly and the first locking portion. When the lock assembly is driven, the steady state is broken, and the operating mechanism switches to the tripped state under the action of the mechanism spring. The first direction and the second direction are two directions perpendicular to each other; in the first direction, the hinge is always located between the second axis and the third axis.

2. A circuit breaker according to claim 1, characterized in that: The outer shell includes a cover shell, a base plate, a first support member and a second support member; the inner cavity is opened on the cover shell, the bottom of the cover shell has an inner cavity opening, and the base plate is fixed to the cover shell for closing the inner cavity opening; the first support member and the second support member are both in the inner cavity, and the inner cavity wall and the first support member jointly limit the inner handle to form a rotation setting of the inner handle and the outer shell, and the inner cavity wall and the second support member jointly limit the rotating member to form a rotation setting of the rotating member and the outer shell; the first support member, the second support member and the cover shell are detachably fixed, or the first support member, the second support member are fixed to the base plate, or the first support member, the second support member and the base plate are integrally formed.

3. The circuit breaker according to claim 1, wherein: The inner cavity includes at least one pole space, and the inner handle has a contact mounting portion arranged in each pole space; the number of moving contact assemblies is consistent with the number of pole spaces, and each contact mounting portion corresponds to a moving contact assembly; a mounting cavity is provided on the contact mounting portion, and a mounting groove is provided on the wall of the mounting cavity; the moving contact assembly includes a contact rotating shaft, and one end of the moving contact assembly extends into the mounting groove through the contact rotating shaft to form a hinge, and during the rotation of the inner handle about the second axis, the hinge follows the rotation of the inner handle under the action of the groove wall of the mounting groove.

4. A circuit breaker according to claim 1, characterized in that: The inner cavity includes at least one pole space, and the rotating member has a rotating sub-part arranged in each pole space; the number of moving contact assemblies and mechanism springs is consistent with the number of pole spaces, and each rotating sub-part corresponds to a moving contact assembly and a mechanism spring; the two ends of the mechanism spring are connected between the corresponding rotating sub-part and the moving contact assembly. In the process of the operating mechanism changing from the open state to the closed state, the mechanism spring first stores energy and then releases energy to accelerate the movement of the moving contact assembly, and the mechanism spring provides final pressure for the moving contact assembly.

5. The circuit breaker according to claim 1, characterized in that: The inner cavity includes at least one pole space, each pole space corresponds to a group of main circuit conductors, and the moving contact assembly is part of the main circuit conductor; a first trip device is provided in at least one pole space, and the locking assembly has a first triggering part corresponding to the first trip device; when the main circuit conductor is overloaded and / or short-circuited, the first trip device drives the first triggering part to release the locking assembly from the first locking part, and the operating mechanism switches to the tripping state under the action of the mechanism spring.

6. A circuit breaker according to claim 5, characterized in that: At least one of the following structures is also included: Structure 1 further includes a mounting bracket, the first release is arranged on the mounting bracket, the lock assembly is arranged on the mounting bracket, and the first release and the lock assembly are installed in the inner cavity through the mounting bracket; Structure 2, the first release is a hydraulic electromagnetic release, which includes a solenoid, an oil cup, an iron core, an iron core reset spring and an armature reset spring; The solenoid is wrapped around the outside of the oil cup and is part of the main circuit conductor; the iron core and the iron core return spring are inside the oil cup; the oil cup has a pole shoe at the end close to the armature, and the armature is set to rotate; when the main circuit conductor is overloaded or short-circuited, the iron core moves toward the pole shoe so that the pole shoe attracts the armature to rotate, and the armature pushes the first trigger part to rotate; the armature return spring is used to drive the armature to reset after rotation, and the iron core return spring is used to drive the iron core to reset after movement.

7. The circuit breaker according to claim 1, characterized in that: The inner cavity includes at least one pole space, each pole space is correspondingly provided with a group of main circuit conductors, and the moving contact assembly is a part of the main circuit conductor; a second release is provided in at least one pole space, and the locking assembly has a second trigger portion corresponding to the second release; The second tripper is actuated upon receiving the driving signal, driving the second triggering part to release the lock assembly from the first locking part, and the operating mechanism is switched to the tripping state under the action of the mechanism spring.

8. The circuit breaker according to claim 1, characterized in that: At least one of the following structures is also included: Structure 1 further includes an external handle assembly having a manipulation member, the manipulation member being linked to the first end of the drive shaft and being manipulated by a user; the manipulation member having status markings corresponding to the three states of the operating mechanism on its periphery, with the different status markings being indicated by rotation of the manipulation member; The second structure also includes an external handle assembly, the external handle assembly having a manipulation member and an inner lining, the manipulation member being linked to the first end of the drive shaft and being operated by a user; the inner lining being a statically arranged component and having a padlock slot, the manipulation member having a padlock hole; the padlock hole being connected to the padlock slot for padlocking; Structure three: an insert nut is embedded in the outer shell, and the drive shaft penetrates the insert nut.

9. The circuit breaker according to claim 1, characterized in that: The lock assembly includes a first lock member, a second lock member, and a lock spring. The first lock member is rotatably disposed relative to the housing about a fifth axis, and the second lock member is rotatably disposed relative to the housing about a sixth axis, both the fifth axis and the sixth axis being parallel to the second direction. The first lock member has a second locking portion and a third locking portion, and the second lock member has a fourth locking portion. In the first direction, the fifth axis is higher than the sixth axis, the first locking portion and the second locking portion are both located between the fifth axis and the sixth axis, and the third locking portion and the fourth locking portion are both located below the second locking portion. The lock spring is connected between the first lock member and the second lock member to provide a biasing force when the lock assembly transitions to a locked state. When the lock assembly is in the locked state, the first locking portion abuts against the second locking portion, and the third locking portion abuts against the fourth locking portion. When the lock assembly is in the unlocked state, the first locking portion is released from abutment with the second locking portion, and the third locking portion is released from abutment with the fourth locking portion. The rotating member blocks one side of the first lock member to restrict the lock assembly from transitioning to the locked state. The lock spring is in an energy-storing state to provide a spring force to transition to the locked state.

10. A circuit breaker according to claim 9, characterized in that: At least one of the following structures is also included: Structure 1: The first locking member has an escape portion, which is connected to the third locking portion in the first direction and is located above the third locking portion; when the locking assembly is in the unlocked state, the fourth locking portion is located in the escape portion; Structure 2, the locking spring includes a first abutting end and a second abutting end, the first abutting end abuts against the first locking member, the second abutting end abuts against the first locking member, and the first abutting end and the second abutting end are always located below the sixth axis; Structure 3: The first locking member has a first spring mounting portion, the second locking member has a second spring mounting portion, and the two ends of the locking spring are respectively connected to the first spring mounting portion and the second spring mounting portion; Structure 4: A mounting bracket is provided in the inner cavity, and the first locking member and the second locking member are both rotatable relative to the outer shell through the mounting bracket.

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