Circuit breaker

Abstract

The invention discloses a circuit breaker, and the circuit breaker comprises a housing which is provided with an inner cavity; the driving part and the second end of the driving shaft move synchronously, and the position where the driving part is located deviates from the first axis; the inner handle and the driving part form linkage, the inner handle is provided with a switching-on position, a tripping position and a switching-off position, and the tripping position is located between the switching-on position and the switching-off position; one end of the moving contact assembly is hinged to the inner handle, the axis of the hinged position is parallel to the second direction, and the hinged position rotates along with the inner handle; the lock catch assembly has a locking state and an unlocking state; when the inner handle is in a tripping position, the lock catch assembly is in an unlocking state; the rotating piece is rotationally arranged around the third axis and the shell; the mechanism spring is connected between the moving contact assembly and the rotating part; the operating mechanism has three states, is compact in structure and is very suitable for the explosion-proof circuit breaker.

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 directly place existing small circuit breakers in explosion-proof covers. The operating mechanism of such small circuit breakers only has the opening indication position and the closing indication position, and the operating mechanism of such small circuit breakers does not have a separate trip indication (trip position indication) function. Even if there is a line fault (such as leakage, overload, short circuit, etc.), the handle of the operating mechanism only indicates the opening position. At the same time, the performance of the existing explosion-proof circuit breaker is constrained by the structure of the small circuit breaker itself, and it is difficult to improve it.

[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), but the operating mechanism of the molded case circuit breaker cannot be directly applied to the explosion-proof circuit breaker, because even the operating mechanism of the smallest specification 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: a housing having an inner cavity; The operating mechanism comprises a driving shaft and a driving part arranged 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 arranged with the housing around a first axis, the first axis is parallel to the first direction, a first end of the drive shaft is exposed outside the housing for operation, and a second end is in the inner cavity; A driving part, the driving part and the second end of the driving shaft form a synchronous motion, and the position of the driving part deviates from the first axis; The inner handle is rotatably arranged with the outer shell around the second axis, the second axis is parallel to the second direction, the inner handle forms a linkage with the driving part, and the linkage position is located above the second axis in the first direction; the inner handle has a closing position corresponding to the operating mechanism being in a closing state, a tripping position corresponding to the operating mechanism being in a tripping state, and an opening position corresponding to the operating mechanism being in an opening state, and the tripping position is between the closing position and the opening position; A moving contact assembly, one end of which 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; The lock catch assembly has a locked state formed with the first locking portion and an unlocked state after being 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 is parallel to the second direction, and the rotating member includes a first locking portion and a reset portion; the reset portion is located on the side where the inner handle moves in the opening direction, and when the inner handle is in the tripping 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, so that the first locking portion and the lock assembly are re-locked; The mechanism spring is connected between the moving contact assembly and the rotating member to provide a spring force for realizing the state switching of the operating mechanism; when the operating mechanism is in the closed state, the mechanism spring is in the energy storage state, and the operating mechanism maintains a steady state under the locking action of the lock assembly and the first locking part. When the lock assembly is driven, the steady state is broken, and the operating mechanism switches to the tripping 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 between the second axis and the third axis.

[0007] In some embodiments of the present application, 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 and the base plate are fixed, or the first support member, the second support member and the base plate are integrally formed.

[0008] 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; an installation cavity is provided on the contact mounting portion, and an installation groove is provided on the wall of the installation cavity; the moving contact assembly includes a contact shaft, and one end of the moving contact assembly extends into the installation groove through the contact 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 installation groove.

[0009] 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; both 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, accelerating the movement of the moving contact assembly, and the mechanism spring provides final pressure for the moving contact assembly.

[0010] In some embodiments of the present application, 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 a part of the main circuit conductor; a first release is arranged in at least one pole space, and the lock assembly has a first trigger part corresponding to the first release; when the main circuit conductor is overloaded and / or short-circuited, the first release drives the first trigger part to release the lock assembly from the first locking part, and the operating mechanism switches to the tripping state under the action of the mechanism spring. In some embodiments of the present application, it also 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.

[0011] 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 surrounds 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.

[0012] In some embodiments of the present application, 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 a 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 when receiving a drive signal, driving the second trigger portion so that the lock assembly releases the lock from the first locking portion, and the operating mechanism switches to the tripping state under the action of the mechanism spring. In some embodiments of the present application, it also includes an external handle assembly, the external handle assembly has a manipulation member, the manipulation member is linked to the first end of the drive shaft, and the manipulation member is for the user to manipulate; the periphery of the manipulation member has state markings corresponding to the three states of the operating mechanism, and different state markings are indicated by the rotation of the manipulation member.

[0013] 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 arranged 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.

[0014] In some embodiments of the present application, an insert nut is embedded in the housing, and the drive shaft penetrates the insert nut.

[0015] 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 arranged relative to the housing with a fifth axis, and the second lock member is rotatably arranged relative to the housing with a sixth axis, and the fifth axis and the sixth axis are 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 is transformed into a locked state; when the lock assembly is in a 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 an 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 is blocked on one side of the first lock member to limit the lock assembly from transforming into a locked state, and the lock spring is in an energy storage state to provide a spring force for transforming into a locked state.

[0016] In some embodiments of the present application, the first locking member has an avoidance portion, and in a first direction, the avoidance portion is connected to the third locking portion, and the avoidance portion 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.

[0017] 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, 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.

[0018] 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.

[0019] 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.

[0020] The beneficial effects of this application include: First, the above 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 circuit breaker has an inner cavity in the outer shell. Except for the first end of the drive shaft (the first end is external for connection to the external handle), the remaining parts of the mechanism are directly arranged in the inner cavity. Compared with the mechanism of the traditional small circuit breaker (arranged inside the small circuit breaker shell, and the small circuit breaker is 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 shell. In this way, the design space of the operating mechanism is larger, which can meet the requirements of higher performance (originally limited by the shell of the small circuit breaker itself, the performance of the circuit breaker is 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 realize the opening and closing operation by the remaining parts alone), which is completely different from the traditional molded case circuit breaker (the output end of the operating mechanism is connected to the moving contact assembly to realize the opening and closing. If the moving contact assembly is removed, the operating mechanism itself can also realize the opening and closing operation 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

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work. Figure 1 Schematic diagram showing the operating mechanism of the circuit breaker (2 poles) in Example 1 of the present application Figure 2A schematic diagram of the operating mechanism (closing) of the circuit breaker (2-pole) in Example 1 of the present application is shown; 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; 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; Figure 5 A schematic diagram showing a drive shaft and a drive part in an operating mechanism of a circuit breaker in Embodiment 1 of the present application is shown; Figure 6 A schematic diagram of an inner handle of a circuit breaker (2-pole) according to Embodiment 1 of the present application is shown; Figure 7 A schematic diagram of a rotating part of a circuit breaker (2 poles) according to Embodiment 1 of the present application is shown; Figure 8 A schematic diagram showing a moving contact assembly and a mechanism spring of a circuit breaker in Embodiment 1 of the present application is shown; Fig. 9 A schematic diagram showing the coordination of the moving contact assembly, the mechanism spring, and the rotating member of the circuit breaker in Embodiment 1 of the present application is shown; Fig.10 A schematic diagram showing the coordination of the moving contact assembly and the inner handle of the circuit breaker in Embodiment 1 of the present application is shown; Fig.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; Fig.12 A schematic diagram showing a rotating member and a locking assembly of a circuit breaker in Embodiment 1 of the present application in an unlocked state; Fig.13 A schematic diagram of a second locking member of a circuit breaker (2 poles) in Embodiment 1 of the present application is shown; Fig.14 A schematic diagram of a first locking member of a circuit breaker (2 poles) in Embodiment 1 of the present application is shown; Fig.15 An exploded view of a circuit breaker (2 poles) according to Embodiment 1 of the present application is shown; Fig.16 A schematic diagram showing the rotating member of the circuit breaker of Embodiment 1 of the present application, the locking assembly and the inner handle when they are in a locked state; Fig.17 A schematic diagram showing the inner handle of the circuit breaker in Embodiment 1 of the present application driving the rotating member and the lock assembly to restore the locked state; Fig.18 A schematic diagram showing a mounting bracket, a first release, a second release, and a locking assembly of a circuit breaker (2-pole) in Embodiment 1 of the present application is shown; Fig.19A schematic diagram of a second release and a lock assembly of a circuit breaker in Embodiment 1 of the present application is shown; Fig. 20 A schematic diagram of a first release and a locking assembly of a circuit breaker in Embodiment 1 of the present application is shown; Fig.21 A schematic diagram showing a first release of a circuit breaker in Embodiment 1 of the present application when the first release is not actuated; Fig. 22 A schematic diagram of a cover of a circuit breaker (2-pole) according to Embodiment 1 of the present application is shown; Fig.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; Fig.24 An exploded view of a circuit breaker (4 poles) according to Embodiment 1 of the present application is shown; Fig.25 A schematic diagram of a cover of a circuit breaker (4 poles) according to Embodiment 1 of the present application is shown; Fig.26 A schematic diagram of a circuit breaker (4 poles) and an external handle assembly according to Embodiment 1 of the present application is shown; Fig. 27 An exploded view of the external handle assembly of Example 1 of the present application is shown. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and 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 cannot be understood as limiting the present application.

[0023] 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 referred device or element 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.

[0024] In addition, the terms "primary" and "secondary" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "primary" or "secondary" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, unless otherwise clearly specified and 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 the main feature and the second feature are in indirect contact through an intermediate medium. Moreover, when a main feature is “above”, “above” or “above” a second feature, it can mean that the main feature is directly above or obliquely 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 obliquely below the second feature, or simply means that the main feature is lower in level than the second feature. Example

[0027] like Figure 1-Figure 27 As shown, embodiment 1 of the present application provides a circuit breaker, including the following structure: 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 .

[0028] The housing has an inner cavity 201 , and all components of the operating mechanism except the driving shaft 110 are located in the inner cavity 201 .

[0029] The drive shaft 110 has a first end exposed outside the housing for operation, and a second end in the inner cavity 201. Here, the drive shaft 110 is rotatably arranged with the housing around a first axis P1, and the first axis P1 is parallel to the first direction H. An insert nut 111 is embedded in the housing, and the drive shaft 110 passes through the insert nut 111, with a first end exposed outside the housing and the other end in the inner cavity 201. Such an insert nut 111 design will help improve the sealing performance of the drive shaft 110 and is more suitable for explosion-proof circuit breakers.

[0030] 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 determine the status of the circuit breaker through the external handle assembly 180 (for example, when tripping, the drive shaft 110 will also drive the external handle assembly 180 to rotate).

[0031] The external handle assembly 180 has an operating member 181, which is a handle for the user to operate. The operating member 181 is linked with the drive shaft 110. The linkage setting here can be a direct linkage setting, for example, the operating member 181 is directly fixed to the first end of the drive shaft 110; it can also be an indirect linkage setting (also an implementation method of the present application), the operating member 181 is locked with the shaft sleeve assembly 182, the shaft sleeve assembly 182 is sleeved on the first end of the drive shaft 110, and the operating member 181 is linked with the drive shaft 110 through the shaft sleeve assembly 182. Here, the shaft sleeve assembly 182 is composed of three parts that are locked in sequence (locked in a direction perpendicular to the first axis P1); of course, fewer parts can be locked (for example, 2 parts are locked), or more parts can be locked (for example, 4 parts are locked), or it can be directly one part (the shaft sleeve assembly 182 is an integral part).

[0032] There are status marks corresponding to the three states of the operating mechanism around the operating member 181, namely, a closing mark, an opening mark, and a trip mark (not shown in the figure), and the three marks correspond to the three states of the operating mechanism, and different state marks are indicated by the rotation of the operating member 181. In this way, the user can determine the state of the operating mechanism (or the state of the circuit breaker) through this indication.

[0033] The status indicator here can be set on the outer shell or on the external handle assembly 180 (on the panel of the external handle assembly 180, the operating member 181 is rotatable relative to the panel).

[0034] The above-mentioned operating member 181 rotates around the inner liner 183, and the sleeve assembly 182 is also in the inner liner 183. A padlock hole 184 is provided on the operating member 181, and a padlock slot 185 is provided on the inner liner 183. When the padlock hole 184 is connected to the padlock slot 185, a padlock can be provided. The specific padlock position here can be a padlock in the closing position, a padlock in the opening position, or a padlock in the relocking position. Of course, this does not specifically mean that this external handle assembly must have these three padlock positions at the same time. For example, only one or only two of them are also feasible.

[0035] 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 on 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, and the fork is sleeved on the outside of the inner handle 130, so that the driving shaft 110 drives the inner handle 130 to rotate.

[0036] 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.

[0037] The movable contact assembly 160 has one end hinged to the inner handle 130, and the other end is a movable contact (cooperating 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. That is to say, when the inner handle 130 rotates with the second axis P2, the position of the hinge P4 will also change (following the change of the inner handle 130). Regardless of the position of the hinge P4, in the first direction H, the hinge P4 is always between the second axis P2 and the third axis P3.

[0038] The lock catch assembly 150 has a locked state with the first locking portion 141 and an unlocked state after being unlocked with the first locking portion 141. That is, when the lock catch assembly 150 is in the locked state, it is locked with the first locking portion 141; when the lock catch assembly is in the unlocked state, the lock catch assembly and the first locking portion 141 are unlocked. When the inner handle 130 is in the closing position N and the opening position F, the lock catch assembly 150 is in the locked state, that is, it is locked with the first locking portion 141. Only when the inner handle 130 is in the tripping position T, the lock catch assembly 150 is in the unlocked state, that is, it is unlocked with the first locking portion 141.

[0039] The rotating member 140 is arranged to rotate with the housing around the 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 here is used to lock or unlock with the lock assembly 150. The reset portion 142 is used to drive the lock assembly 150 to reset (return to the locked state). Specifically, the reset portion 142 is located on the side of the inner handle 130 moving in the opening direction. When the inner handle 130 is in the tripping position T, after driving the inner handle 130 to move to the opening position F (actually driving the driving shaft 110 to rotate, causing the inner handle 130 to move), the inner handle 130 can push the reset portion 142 to rotate the rotating member 140, so as to achieve the re-locking of the first locking portion 141 and the lock assembly 150. Here, the re-locking can be re-locked just when the inner handle 130 reaches the opening position F; or it can be re-locked when the inner handle 130 is about to reach the opening position F.

[0040] The mechanism spring 170 is connected between the moving contact assembly 160 and the rotating member 140 to provide spring force for realizing the state switching of the operating mechanism. When the operating mechanism is in the closed state, the mechanism spring 170 is in the energy storage state, and the operating mechanism maintains a steady state under the locking action of the lock assembly 150 and the first locking portion 141. When the lock assembly 150 is driven, the steady state is broken, and the operating mechanism switches to the tripping state under the action of the mechanism spring 170. The mechanism spring 170 here can achieve the effect of quickly 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 portion 141 are locked), an 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 this time, the lock assembly 150 and the first locking part 141 are also locked), the external force causes the drive shaft 110 to rotate in the closing 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 closed state (the moving contact assembly 160 contacts the static contact 165). In order to prevent the mechanism spring 170 from being burned by the arc, an insulating sleeve 171 is also provided on the mechanism spring 170.

[0041] 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.

[0042] Through the design of the above structure, the operating mechanism has three states, and the user can be reminded through the tripping state that the circuit breaker tripped due to a line fault. In the above operating mechanism, basically all the components are in the inner cavity 201 (even the drive shaft 110 is only the first end 110a is not there), compared with the mechanism of the traditional small circuit breaker (set inside the small circuit breaker housing, and the small circuit breaker is set in the inner cavity 201 of the explosion-proof cover), this mechanism is equivalent to being directly set in the inner cavity 201 of the explosion-proof housing, so that the design space of the operating mechanism is larger, and it can meet the requirements of higher performance (originally limited by the small circuit breaker housing itself, the performance of the circuit breaker is very limited). Such a mechanism is equivalent to directly incorporating the moving contact assembly 160 as a part of the operating mechanism (that is, the moving contact assembly 160 is connected to the rotating member 140 through the mechanism spring 170. If the moving contact assembly 160 is missing, this operating mechanism cannot achieve the opening and closing operation by relying on the remaining parts alone), which 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 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 the explosion-proof circuit breaker.

[0043] As a more preferred locking assembly 150, it includes a first locking member 151, a second locking member 152 and a locking spring 153. Here, the first locking member 151 is rotatably arranged relative to the housing with a fifth axis P5, and the second locking member 152 is rotatably arranged relative to the housing with a sixth axis P6, and both the fifth axis P5 and the sixth axis P6 are parallel to the second direction D.

[0044] 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, and 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 a 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 abutment, the third locking portion 151b and the fourth locking portion 152a are released from abutment, the rotating member 140 blocks the lock assembly 150 from changing to the locked state on one side of the first lock member 151, and the lock spring 153 is in the energy storage state to provide the lock assembly 150 with a spring force to change to the locked state. The first locking portion 141 and the second locking portion 151a at the top are both convex, the third locking portion 151b is a plane, and the fourth locking portion 152a is a convex.

[0045] 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.

[0046] Such a structure forms locking or unlocking by forming abutment or releasing abutment (or overlapping or releasing overlapping) between the above-mentioned locking parts, and has the characteristic of simple locking structure. The lock spring 153 can ensure that the reset part 142 drives the rotating member 140 to move. When the rotating member 140 gradually breaks away from the obstruction of the lock assembly 150, the lock spring 153 causes the first lock member 151 to rotate, so that the first locking part 141 and the second locking part 151a are against each other, and the third locking part 151b and the fourth locking part 152a are against each other (that is, the lock assembly 150 returns to the locked state).

[0047] The first locking member 151 has an escape portion 151c, which is a through hole. Of course, it can also be in the form of a groove (sufficient to accommodate the fourth locking portion 152a). The escape portion 151c is designed so that when the locking assembly 150 is in the unlocked state, the fourth locking portion 152a is in the escape portion 151c. In the first direction H, the escape portion 151c is connected to the third locking portion 151b, which is conducive to the movement of the fourth locking portion 152a (it is conducive to the fourth locking portion 152a entering the escape portion 151c and releasing the abutment with the third locking portion 151b; it is also conducive to the fourth locking portion 152a moving out of the escape portion 151c and abutting against the third locking portion 151b).

[0048] As a more preferred method, the lock spring 153 adopts a compression spring, which includes a first abutting end and a second abutting end, the first abutting end abuts against the first locking member 151, and the second abutting end abuts against the first locking member 151, and the first abutting end and the second abutting end are always located below the sixth axis P6. Of course, as an alternative, the lock spring 153 can also adopt a spring sheet or a torsion spring, which also has a first abutting end and a second abutting end. This method in which the first abutting end and the second abutting end are always located below the sixth axis P6 will help push the first locking member 151 to reset (that is, re-lock).

[0049] Similarly, the first locking member 151 has a first spring mounting portion 151d, the second locking member 152 has a second spring mounting portion 152b, and 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 according to the specific types of springs, as long as the two abutting ends of the locking spring 153 can be limited. For example, when it is a compression spring, the first spring mounting portion 151d and the second spring mounting portion 152b adopt the method of positioning columns. For example, when it is a torsion spring or a spring sheet, it is a protrusion with a limiting groove, and the limiting groove will facilitate the stable installation of the torsion spring and the spring sheet.

[0050] Here, the first locking member 151 and the second locking member 152 are rotatably arranged on the mounting bracket 308, and the mounting bracket 308 is arranged in the inner cavity 201. Specifically, the first locking member 151 has a fifth rotating shaft S5 (its axis is the fifth axis P5), which is rotatably arranged on the mounting bracket 308 through the fifth rotating shaft S5, so as to rotate relative to the shell. The second locking member 152 has a sixth rotating shaft S6 (its axis is the sixth axis P6), which is rotatably arranged on the mounting bracket 308 through the sixth rotating shaft S6, so as to rotate relative to the shell. Of course, the fifth rotating shaft S5 and the sixth rotating shaft S6 mentioned above can be either an independent shaft or a cylindrical protrusion directly formed on the first locking member 151 and the second locking member 152. With such a structure, after the first locking member 151, the second locking member 152 and the mounting bracket 308 are assembled, the mounting bracket 308 can be installed in the inner cavity 201, so that the modular assembly of the operating mechanism can be realized, which is conducive to product assembly.

[0051] As for the outer shell, it includes a cover shell 200 , a bottom plate 202 , a first support member 203 and a second support member 204 .

[0052] The inner cavity 201 is opened on the housing 200. The bottom of the housing 200 has an inner cavity 201 opening. The bottom plate 202 is fixed to the housing 200 to close the inner cavity 201 opening. All components inside the circuit breaker are loaded into the inner cavity 201 through the inner cavity 201 opening.

[0053] Here, the first support member 203 and the wall of the inner cavity 201 together limit the inner handle 130, and the limitation here refers to the limitation in terms of rotation, thereby forming a rotational 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 wall of the inner cavity. 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 rotational connection through this limitation. Here, the first arc groove 203a and the second arc groove 201a can be as follows Fig.23 As shown in FIG. 1 , the second arc groove 201a is not misaligned in the second direction D (that is, the second arc groove 201a is located directly above the first arc groove 203a). Fig.15 , 24 -25 is misaligned (not directly above, but the second arc groove 201a is higher than the first arc groove 203a). No matter which method is used, the rotation connection of the inner handle 130 can be achieved.

[0054] Here, the second support member 204 and the wall of the inner cavity 201 together limit the rotating member 140, and the limitation here refers to the limitation in terms of rotation, thereby forming a rotational 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 wall of the inner cavity. 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 rotational connection through this limitation. Here, the third arc groove 204a and the fourth arc groove 201b can be as follows Fig.15 , 22 As shown in FIG. 23 , the fourth arc groove 201 b is not misaligned in the second direction D (ie, the fourth arc groove 201 b is located directly above the third arc groove 204 a ), and may also be misaligned.

[0055] The portion of the inner handle 130 used to fit with the first arc groove 203a and the second arc groove 201a may be formed integrally with the inner handle 130 or may be formed as an independent pin. Similarly, the portion of the rotating member 140 used to fit with the third arc groove 204a and the fourth arc groove 201b may be formed integrally with the rotating member 140 or may be formed as an independent pin.

[0056] The above-mentioned first support member 203 and second support member 204 can be arranged in 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.).

[0057] 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 convenient assembly.

[0058] The inner cavity 201 of the shell is divided into at least one pole space 2010, where the number of pole spaces 2010 is determined according to 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 1-pole circuit breaker. When there are two pole spaces 2010, there are two pole spaces 2010 (both pole spaces 2010 are components of the inner cavity 201), and the circuit breaker is a 2-pole circuit breaker. Similarly, 3-pole, 4-pole and 2-pole are similar and will not be repeated here. For circuit breakers with more than 2 poles, the pole spaces 2010 are separated by phase partitions through the inner cavity 201, and the phase partitions here are composed of the inner cavity 201 wall, the first support member 203 and the second support member 204.

[0059] Each pole space 2010 is provided with a group of moving contact assembly 160 and static contact 165. In the present 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 separated from each other. In addition to the structure of two arms 162, the mounting end here can also adopt one 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), and the contact end 161 is another component (conductive material), and the two are fixed together by riveting, screw fastening, etc.

[0060] Here, the inner handle 130 has a contact mounting portion 130a, the number of which corresponds to the number of the pole spaces 2010, and is arranged in the corresponding pole spaces 2010, because each pole space 2010 has a group of moving contact assemblies 160 and a group of mechanism springs 170. A mounting cavity 130b is provided on each contact mounting portion 130a, and the mounting cavity 130b is an open chamber, so that the mounting end of the moving contact assembly 160 can extend into the mounting cavity 130b. A mounting groove 130c is provided on the wall of the mounting cavity 130b, and the number of the mounting grooves 130c here is two. The end of the movable contact assembly 160 that extends into the installation cavity 130b has two contact shafts 163 (integrally formed with the two arm portions 162 respectively), and the two contact shafts 163 extend into the two installation slots 130c respectively to form a hinge (that is, a hinge between the inner handle 130 and the movable contact assembly 160). Here, as the inner handle 130 rotates about the second axis P2, the contact shaft 163 also rotates about the second axis P2 under the push of the groove wall of the installation slot 130c. Of course, the two contact shafts 163 here can also be hinged to the installation slot 130c by a separate pin shaft passing through the arm portion 162.

[0061] 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.

[0062] Here, the rotating member 140 has a rotating sub-section 140a, the number of which corresponds to the number of the pole spaces 2010, and is arranged in the corresponding pole spaces 2010. This is because the moving contact assembly 160 in each pole space 2010 corresponds to a group of mechanism springs 170, one end of the mechanism spring 170 is connected to the moving 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 moving 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 in the form of other springs, and it only needs to adaptably change the corresponding matching structure.

[0063] The first hanging portion 164 here is formed by bending part of 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.

[0064] The second suspension part 140b here is a rod, and the rod is arranged on the rotating sub-part 140a. Here, a slot 140a1 is provided in the rotating sub-part 140a, and the second suspension part 140b is in the slot 140a1. Since the second suspension part 140b is hooked by the mechanism spring 170, the mechanism spring 170 gives the second suspension part 140b a force away from the notch direction of the slot 140a1, which can prevent the second suspension part 140b from falling off easily and ensure the stable setting of the second suspension part 140b. A shallow groove can be provided on the surface of the second suspension part 140b here, which can slightly limit the suspension part of the mechanism spring 170.

[0065] The arrangement of the rotating sub-part 140a, the mechanism spring 170, and the moving contact assembly 160 is conducive to connecting each moving contact assembly 160 to the rotating member 140 through the mechanism spring 170, ensuring that each moving contact assembly 160 can have a spring arrangement (to ensure the final pressure), and at the same time, it can also ensure that the mechanism has sufficient spring force. The arrangement of the tension spring, the first suspension part 164, the second suspension part 140b and other structures has the effect of being very simple and convenient to install, and the spring force of the tension spring is relatively easy to calculate, so it is a more preferred solution to use it as the mechanism spring 170. The mechanism spring 170 here can first store energy and then release energy to accelerate the movement of the mechanism during the switching process between the opening and closing states. The details have been described above and will not be repeated here.

[0066] There are many types of releasers 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 releaser, and the other type is the second releaser 400.

[0067] The first release is directly connected to the main circuit conductor (each pole space 2010 has a group 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.

[0068] For this type of release, it is arranged in at least one pole space 2010. For a single-pole circuit breaker, its pole space 2010 is arranged with a first release. For a multi-pole circuit breaker, it is more beneficial to protect the line if the first release is arranged in the pole space 2010 corresponding to all P-pole main circuit conductors as much as possible.

[0069] The first locking member 151 has a first triggering portion 151e that cooperates with the first release. When the first release is actuated, the first triggering portion 151e is triggered, so that the locking assembly 150 is released from the first locking portion 141.

[0070] Taking the 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 outer side of the oil cup 301, and the solenoid 300 is a part of the main circuit conductor. One end of the oil cup 301 is a pole shoe 306, and the armature 305 is rotatably arranged (rotatably arranged on a yoke 307). The yoke 307 is arranged around the solenoid 300 and other components. One end of the armature return spring 304 is connected to the yoke 307, and the other end is connected to the armature 305. When the main circuit is overloaded or short-circuited, the iron core moves toward the pole shoe 306 (the iron core reset spring stretches), the pole shoe 306 attracts the armature 305 to rotate (the armature reset spring 304 deforms), and the armature 305 pushes the first trigger part 151e to rotate, causing the operating mechanism to trip. Subsequently, the armature reset spring 304 drives the armature 305 to reset, and the iron core reset spring drives the iron core to reset. Such a hydraulic electromagnetic release is suitable for a smaller space.

[0071] The hydraulic electromagnetic release here is arranged on a mounting bracket 308, and the mounting bracket 308 here is the same bracket as the mounting bracket 308 related to the lock assembly 150. Through such a mounting bracket 308, these structures can be installed through the mounting bracket 308, which is conducive to assembly.

[0072] 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 triggering 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. It will not be repeated here.

[0073] The second release 400, there are many types of such releases, for example, it can be a leakage release, a shunt release, an overvoltage release, an undervoltage release, an over- and under-voltage release, etc. They all have one thing in common (all driven by voltage), that is, the release is energized and triggered by a driving signal. It's just that the types of releases are different, and the sources of the signals are different. For example, the driving signal of the leakage release comes from the leakage protection circuit, the driving signal of the shunt release comes from the host computer, and the overvoltage release, undervoltage release, and over- and under-voltage release come from the over- and under-voltage protection circuits. How to generate the above-mentioned driving signal is a well-known technology in the art and will not be repeated here.

[0074] 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 (only set in one pole space 2010), or multiple second releases 400 (set in multiple pole spaces 2010). When there are multiple second releases 400, they can be different types of releases, for example, when there are two, they are a leakage release and a shunt release, when there are three, they are a leakage release, a shunt release, and an over-voltage release. Of course, there are many types of this kind and they are not listed one by one.

[0075] The first lock member 151 has a second triggering portion 151f, and the number of the second triggering portions 151f is the same as that of the second releases 400, and they correspond one to one. When any second release 400 is triggered (receives the driving signal required by it), the top rod of the second release 400 extends to trigger the corresponding second triggering portion 151f, so that the lock assembly 150 is unlocked from the first locking portion 141, so that the operating mechanism trips.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] 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 comprises a driving shaft and a driving part arranged 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 arranged with the housing around a first axis, the first axis is parallel to the first direction, a first end of the drive shaft is exposed outside the housing for operation, and a second end is in the inner cavity; A driving part, the driving part and the second end of the driving shaft form a synchronous motion, and the position of the driving part deviates from the first axis; The inner handle is rotatably arranged with the outer shell around the second axis, the second axis is parallel to the second direction, the inner handle forms a linkage with the driving part, and the linkage position is located above the second axis in the first direction; the inner handle has a closing position corresponding to the operating mechanism being in a closing state, a tripping position corresponding to the operating mechanism being in a tripping state, and an opening position corresponding to the operating mechanism being in an opening state, and the tripping position is between the closing position and the opening position; A moving contact assembly, one end of which 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; The lock catch assembly has a locked state formed with the first locking portion and an unlocked state after being 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 is parallel to the second direction, and the rotating member includes a first locking portion and a reset portion; the reset portion is located on the side where the inner handle moves in the opening direction, and when the inner handle is in the tripping 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, so that the first locking portion and the lock assembly are re-locked; The mechanism spring is connected between the moving contact assembly and the rotating member to provide a spring force for realizing the state switching of the operating mechanism; when the operating mechanism is in the closed state, the mechanism spring is in the energy storage state, and the operating mechanism maintains a steady state under the locking action of the lock assembly and the first locking part. When the lock assembly is driven, the steady state is broken, and the operating mechanism switches to the tripping 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 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; an inner cavity is opened on the cover shell, and 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 and the base plate are fixed, or the first support member, the second support member and the base plate are integrally formed.

3. A circuit breaker according to claim 1, characterized in that: 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 rotates with 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; both 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.

5. A 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 a part of the main circuit conductor; a first release is arranged in at least one pole space, and the locking assembly has a first triggering part corresponding to the first release; when the main circuit conductor is overloaded and / or short-circuited, the first release 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 included: Structure 1 also 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, and the hydraulic electromagnetic release 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 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 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.

7. A 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 lock assembly has a second trigger part corresponding to the second release; The second release 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. A circuit breaker according to claim 1, characterized in that: At least one of the following structures is included: The structure 1 also includes an external handle assembly, the external handle assembly has a manipulation member, the manipulation member is linked to the first end of the driving shaft, and the manipulation member is manipulated by a user; the periphery of the manipulation member has state markings corresponding to the three states of the operating mechanism, and different state markings are indicated by the rotation of the manipulation member; The second structure also includes an external handle assembly, the external handle assembly has a manipulation member and an inner lining, the manipulation member is linked with the first end of the drive shaft, and the manipulation member is for the user to manipulate; the inner lining is a statically arranged component and has a padlock slot, and the manipulation member has a padlock hole; when the padlock hole is connected to the padlock slot, it is for padlocking; Structure three: an insert nut is embedded in the outer shell, and the drive shaft penetrates the insert nut.

9. A circuit breaker according to claim 1, characterized in that: The lock assembly comprises a first lock member, a second lock member and a lock spring; the first lock member is rotatably arranged relative to the housing with a fifth axis, the second lock member is rotatably arranged relative to the housing with a sixth axis, and the fifth axis and the sixth axis are 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 is transformed into a locked state; when the lock assembly is in a 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 an 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 is blocked on one side of the first lock member to limit the lock assembly from transforming into a locked state, and the lock spring is in an energy storage state to provide a spring force for transforming into a locked state.

10. A circuit breaker according to claim 9, characterized in that: At least one of the following structures is included: Structure 1: the first locking member has an escape portion, the escape portion is connected to the third locking portion in the first direction, and the escape portion is located above the third locking portion; when the locking assembly is in an unlocked state, the fourth locking portion is located in the escape portion; Structure 2, the locking spring comprises 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 three, the first locking member has a first spring mounting portion, the second locking member has a second spring mounting portion, and 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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