Operating mechanism and circuit breaker

Abstract

The invention provides an operating mechanism and a circuit breaker, and relates to the technical field of electrical equipment. The operating mechanism comprises a contact assembly and a handle. The contact assembly comprises a contact seat, a moving contact, a static contact and a first elastic piece, at least part of the moving contact is movably arranged in a clamping groove of the contact seat, and the first elastic piece is connected with the moving contact; and the handle is in transmission connection with the contact seat and is used for driving the contact seat to move so as to drive the moving contact and the static contact to be switched on or switched off. In the closing process, the contact seat drives the moving contact to move synchronously, and the moving contact and the contact seat are relatively static; after the moving contact and the static contact are contacted to be switched on, the moving contact and the clamping groove move relatively, and the first elastic piece generates elastic force to act on the moving contact, so that the contact force between the moving contact and the static contact is increased. Therefore, the operating mechanism is simple in structure, few in parts and convenient to assemble, the production cost is reduced, and the operation stability of the operating mechanism is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically, to an operating mechanism and a circuit breaker. Background Technology

[0002] Circuit breakers are mainly used to drive the closing and opening of moving and stationary contacts to connect or disconnect circuits.

[0003] Currently, the connection between the moving contact and the contact seat in existing circuit breakers is mostly fixed using processes such as bonding or hot riveting. However, this not only involves complex procedures but also results in unreliable stability. To compensate for these shortcomings, components such as snap rings, pressure plates, and screws are usually added to enhance connection reliability. However, this also increases the number of components, making the internal structure more complex. This not only increases mold and material costs but also leads to cumbersome assembly processes, thus affecting production efficiency. Summary of the Invention

[0004] This invention provides an operating mechanism and a circuit breaker, which have a simple structure and a small number of parts.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides an operating mechanism, comprising: A contact assembly, comprising a contact base, a moving contact, a stationary contact, and a first elastic element, wherein the contact base is provided with a slot, the moving contact is movably disposed within the slot, and the first elastic element is connected to the moving contact; A handle is connected to the contact seat in a transmission manner. The handle is used to drive the contact seat to move, so as to drive the moving contact to close or open with the stationary contact. During the closing process, the contact seat drives the moving contact to move synchronously, and the moving contact is relatively stationary with respect to the contact seat; after the moving contact contacts the stationary contact to close the circuit, the moving contact moves within the slot.

[0006] In an optional embodiment, the contact assembly further includes a rotating shaft, the contact seat is movably disposed on the rotating shaft, the handle is throttlely connected to one end of the contact seat, the other end of the contact seat is provided with the slot, the moving contact is provided with a retaining part, and the retaining part is movably disposed in the slot.

[0007] In an optional embodiment, the holding part includes a first end and a second end, and the size of the slot corresponding to the second end is larger than the size of the slot corresponding to the first end, so that the second end can rotate around the first end.

[0008] In an optional embodiment, one end of the moving contact is provided with a moving contact portion, and the other end is provided with a connecting portion. The connecting portion is connected to the first elastic member, and the holding portion is disposed between the moving contact portion and the connecting portion, with the first end located at the end closer to the moving contact portion.

[0009] In an optional embodiment, a limiting part is provided in the card slot, which is used to restrict the axial movement of the card holding part.

[0010] In an optional embodiment, the end of the contact seat is further provided with an arc-blocking surface.

[0011] In an optional embodiment, the operating mechanism further includes a tripping assembly, which includes a tripping device, a tripping element, a tripping element, and a locking element. The handle is connected to the contact seat via the tripping element. The tripping element and the locking element are disposed on the contact seat and locked to each other. The tripping device is used to drive the tripping element to move, thereby causing the tripping element to release from the locking element, so that the moving contact is disconnected from the stationary contact.

[0012] In an optional embodiment, the release assembly further includes a second elastic element that acts on the locking member to keep the locking member and the release member in a locked state.

[0013] In an optional embodiment, the trip unit includes a drive rod, and the trip unit further includes at least one of a current coil and a voltage coil. The current coil is connected to the stationary contact and is used to drive the drive rod to move when the current in the circuit where the stationary contact is located increases abnormally. The voltage coil is used to receive a control signal to control the movement of the drive rod. The drive rod is drively connected to the trip unit.

[0014] In a second aspect, the present invention provides a circuit breaker including an operating mechanism as described in any of the foregoing embodiments.

[0015] The beneficial effects of the operating mechanism and circuit breaker provided in this invention include: the closing action is divided into two continuous stages: the first stage is the early stage of the closing stroke, at which time the moving contact has not yet contacted the stationary contact, and the contact seat drives the moving contact to move synchronously, with no relative displacement between them, maintaining a locked position; the second stage is the final stage of the closing stroke, when the moving contact at the front end of the moving contact makes physical contact with the surface of the stationary contact, the contact seat continues to move under the drive of the handle. At this time, because the cooperation structure between the moving contact and the contact seat no longer restricts their synchronous movement, the moving contact moves relative to the slot of the contact seat, thereby compressing or stretching the first elastic element, allowing it to accumulate elastic potential energy; this elastic potential energy is then converted into a force on the moving contact, causing the moving contact to press more tightly against the stationary contact, thereby increasing the contact pressure between them. It can be seen that the operating mechanism, while ensuring the contact pressure between the moving and stationary contacts, has a simple structure and few parts, thus not only facilitating assembly but also effectively reducing production costs and improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the operating mechanism in the tripping state provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the operating mechanism in the closed state provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the just-contact structure of the operating mechanism during the closing process provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the end-of-stroke structure of the operating mechanism during the closing process, provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the tripping structure of the operating mechanism provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the operating mechanism provided in an embodiment of the present invention.

[0018] Icons: 10-Operating mechanism; 100-Contact assembly; 110-Contact seat; 111-Slot; 112-Limiting part; 113-Arc-blocking surface; 120-Moving contact; 121-Holding part; 122-First end; 123-Second end; 124-Moving contact; 125-Connecting part; 130-Stationary contact; 140-First elastic element; 150-Rotating shaft; 200-Handle; 300-Trip assembly; 310-Trip device; 311-Drive rod; 312-Current coil; 313-Voltage coil; 320-Trip element; 330-Trip fastener; 340-Locking element; 350-Second elastic element. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0025] As a core protective component in a power system used to connect and disconnect circuits, the moving contact of a circuit breaker must be reliably installed on the contact base to ensure stable conductivity when closed and accurate movement with the transmission mechanism during the opening process.

[0026] Currently, the connection between the moving contact and the contact seat in existing circuit breakers is mostly fixed using processes such as bonding or hot riveting. However, this not only involves complex procedures but also results in unreliable stability. To compensate for these shortcomings, components such as snap rings, pressure plates, and screws are usually added to enhance connection reliability. However, this also increases the number of components, making the internal structure more complex. This not only increases mold and material costs but also leads to cumbersome assembly processes, thus affecting production efficiency.

[0027] Therefore, there is an urgent need for a moving contact installation method that is simple in structure, reliable in connection, and does not rely on complex auxiliary parts or special processes, so as to effectively reduce manufacturing costs and assembly difficulty while ensuring electrical and mechanical performance.

[0028] Please see Figures 1 to 6 This invention provides an operating mechanism 10, including a contact assembly 100 and a handle 200.

[0029] The contact assembly 100 includes a contact base 110, a moving contact 120, a stationary contact 130, and a first elastic member 140. The contact base 110 is provided with a slot 111, and at least a portion of the moving contact 120 is movably disposed in the slot 111. The first elastic member 140 is connected to the moving contact 120. The handle 200 is driven to move the contact base 110 to drive the moving contact 120 and the stationary contact 130 to close or open the circuit.

[0030] During the closing process, the contact seat 110 drives the moving contact 120 to move synchronously, and the moving contact 120 and the contact seat 110 remain relatively stationary. After the moving contact 120 contacts the stationary contact 130 to close the circuit, the moving contact 120 and the contact seat 110 move relative to each other, and the first elastic element 140 generates an elastic force that acts on the moving contact 120 to increase the contact force between the moving contact 120 and the stationary contact 130.

[0031] In other words, the closing action is divided into two consecutive stages: the first stage is the early stage of the closing stroke, at which time the moving contact 120 has not yet contacted the stationary contact 130, and the contact seat 110 drives the moving contact 120 to move synchronously, with no relative displacement between the two, maintaining a locked position relationship; the second stage is the final stage of the closing stroke, when the moving contact 124 at the front end of the moving contact 120 makes physical contact with the surface of the stationary contact 130, the contact seat 110 continues to be driven by the handle 200 to move (i.e., "overtravel"). At this time, because the cooperation structure between the moving contact 120 and the contact seat 110 no longer restricts their synchronous movement, the moving contact 120 moves relative to the slot 111 of the contact seat 110, thereby compressing or stretching the first elastic element 140, allowing it to accumulate elastic potential energy; this elastic potential energy is then converted into a force on the moving contact 120, causing the moving contact 120 to press more tightly against the stationary contact 130, thereby increasing the contact pressure between the two.

[0032] As can be seen, the operating mechanism 10 provided in this embodiment of the invention has a simple structure and few parts, which not only facilitates assembly and reduces production costs, but also effectively increases the contact pressure between the moving contact 120 and the stationary contact 130 in the closed state, thus effectively improving the operational stability of the operating mechanism 10.

[0033] Furthermore, the contact assembly 100 also includes a rotating shaft 150, a contact seat 110 is movably disposed on the rotating shaft 150, a handle 200 is connected to one end of the contact seat 110, the other end of the contact seat 110 is provided with a slot 111, and the moving contact 120 is provided with a retaining part 121, which is movably disposed in the slot 111.

[0034] In this embodiment, the contact seat 110 is rotatably mounted or pivotally connected to the rotating shaft 150, enabling it to rotate in a controlled manner around the axis of the rotating shaft 150. The handle 200 is connected to one end of the contact seat 110 via a transmission connection. This connection can be a direct rigid connection or a torque transmission achieved through intermediate transmission components such as connecting rods, gears, and cams. The purpose is to convert the swinging operation of the handle 200 into the rotational action of the contact seat 110 around the rotating shaft 150. The other end of the contact seat 110 (i.e., the far end away from the connection end of the handle 200) is provided with a slot 111. The slot 111 is a recessed structure extending along the end of the contact seat 110, with a defined contour shape and spatial orientation. It is usually elongated or arc-shaped, with the opening facing the mounting side of the moving contact 120.

[0035] The moving contact 120 is provided with a retaining part 121, which is a local structural feature that extends outward from the moving contact 120 body and is used to cooperate with the retaining groove 111. For example, it can be a boss, a pin, or a column with steps. The retaining part 121 is movably disposed in the retaining groove 111, which means that the retaining part 121 is not fixed in the retaining groove 111, but is allowed to slide along the groove, rotate slightly around a certain axis, or be displaced in a specific posture within the space defined by the retaining groove 111, thereby providing a structural basis for the movement of the moving contact 120 relative to the contact seat 110.

[0036] Therefore, when the contact seat 110 initially rotates and drives the moving contact 120 to approach the stationary contact 130, the moving contact 120 rotates synchronously with the contact seat 110. After the moving contact 120 contacts the stationary contact 130, the contact seat 110 continues to rotate and generates overtravel. At this time, the constraint relationship of the holding part 121 in the slot 111 changes, thereby allowing the moving contact 120 to be displaced relative to the contact seat 110, which in turn drives the elastic deformation of the first elastic member 140.

[0037] Specifically, the holding part 121 includes a first end 122 and a second end 123. The size of the slot 111 corresponding to the second end 123 is larger than the size of the slot 111 corresponding to the first end 122, so that the second end 123 can rotate around the first end 122.

[0038] In this embodiment, the size of the slot 111 gradually decreases from the rotating shaft 150 toward its end. That is, the second end 123 is located at the end with a relatively larger size in the slot 111, and the first end 122 is located at the end with a relatively smaller size in the slot 111. Therefore, in the early stroke of closing, the moving contact 120 can move synchronously with the contact seat 110 under the constraint of the holding part 121 and the slot 111 of the contact seat 110. After the moving contact 120 contacts the stationary contact 130, the contact seat 110 will continue to move a certain distance. At this time, the moving contact 120 rotates relative to the slot 111 under the combined action of the stationary contact 130 and the slot 111. That is, the second end 123 rotates around the first end 122.

[0039] It should also be noted that one end of the moving contact 120 is provided with a moving contact portion 124 that contacts the stationary contact 130, and the other end is provided with a connecting portion 125. The connecting portion 125 is connected to the first elastic member 140. The holding portion 121 is provided between the moving contact portion 124 and the connecting portion 125, and the first end 122 is located near the end of the moving contact portion 124.

[0040] Therefore, when the contact seat 110 continues to rotate due to overtravel, the first end 122 is firmly limited by the narrow part of the slot 111, becoming the actual center of rotation, while the connecting part 125 is far from this fulcrum. Under the preset installation posture of the first elastic member 140 (for example, one end of the first elastic member 140 is attached to the connecting part 125 and the other end is fixed to the mounting shaft of the housing), the slight deflection of the connecting part 125 will directly stretch or compress the first elastic member 140. The amount of deformation depends on the distance between the first end 122 and the connecting part 125. The longer the distance, the greater the elastic deformation generated at the same deflection angle, thereby adjusting the increase in contact pressure.

[0041] Therefore, by placing the first end 122 close to the moving contact 124, the stability of the fulcrum is ensured (to prevent the fulcrum from being too far from the contact area of ​​the contact head, which would lead to motion instability), and the connecting part 125 is given a sufficiently long effective lever arm, thereby improving the elastic response sensitivity and force transmission efficiency.

[0042] In addition, a limiting part 112 is provided in the card slot 111, which is used to limit the axial movement of the holding part 121.

[0043] The limiting part 112 is a local structure that protrudes or is recessed into the groove body of the slot 111. For example, it can be an annular boss at both ends of the slot 111, a shoulder on the side wall, or a thrust step at the bottom of the groove. Its spatial position is usually located at the end or section of the slot 111 along the axial direction. The limiting part 112 is used to restrict the axial movement of the holding part 121. That is, when the holding part 121 is inserted into the slot 111, its maximum axial displacement is physically blocked by the limiting part 112, thereby preventing the limiting part 112 from leaving the slot 111.

[0044] Furthermore, the end of the contact seat 110 is also provided with an arc-blocking surface 113, which can mechanically block and magnetically blow away the arc at the moment it is generated, forcing the arc to move quickly, lengthen and enter the arc-extinguishing grid area.

[0045] Furthermore, the operating mechanism 10 also includes a tripping assembly 300, which includes a tripping device 310, a tripping element 320, a tripping element 330, and a locking element 340. The handle 200 is connected to the contact seat 110 via the tripping element 330. The tripping element 330 and the locking element 340 are disposed on the contact seat 110 and locked to each other. The tripping device 310 is used to drive the tripping element 320 to move, so as to drive the tripping element 330 and the locking element 340 to release, so as to open the moving contact 120 and the stationary contact 130.

[0046] In this embodiment, the trip unit 310 is a fault detection and initial drive unit that can respond to abnormal current or external control commands; the trip member 320 is a force transmission medium, typically a lever or swing arm rotatably mounted on the housing; the trip member 330 and the locking member 340 together form a pair of interlocking locking mechanisms, both of which are disposed on the contact seat 110 body and achieve mechanical interlocking through specific contours (such as hook grooves, inclined surfaces or teeth), thereby stably locking the closing holding force applied by the handle 200 onto the contact seat 110.

[0047] The handle 200 is connected to the contact seat 110 via the jump fastener 330. When the handle 200 moves, it indirectly drives the contact seat 110 to move via the jump fastener 330, so that the jump fastener 330 simultaneously plays the dual role of transmission and locking. When the trip unit 310 is triggered, its output action directly acts on the trip unit 320, causing the trip unit 320 to rotate or translate, thereby pushing one of the jump fastener 330 or the locking fastener 340 to change its posture, breaking the locking relationship between the two and realizing "unlatching". Once the unlatching is completed, the moving contact 120 moves rapidly in the opposite direction under the reset force of the first elastic element 140, and the moving contact 120 disengages from the stationary contact 130, completing the tripping.

[0048] In addition, the tripping assembly 300 also includes a second elastic element 350, which acts on the locking element 340 to keep the locking element 340 and the tripping element 330 in a locked state.

[0049] The second elastic element 350 is typically a torsion spring or a compression spring. One end of the spring acts on the body of the locking element 340, and the other end is fixed to the contact seat 110. The second elastic element 350 acts on the locking element 340, that is, it accumulates elastic potential energy through pre-compression or pre-torsion and continuously applies this elastic force to the locking element 340, so that it always has a tendency to rotate or translate in the direction of the jumper 330, thereby pushing the locking element 340 and the jumper 330 to maintain a tight engagement.

[0050] It is also worth mentioning that the trip unit 310 includes a drive rod 311, and the trip unit 310 also includes at least one of a current coil 312 and a voltage coil 313. The current coil 312 is connected to the stationary contact 130 and is used to drive the drive rod 311 to move when the current in the circuit where the stationary contact 130 is located increases abnormally. The voltage coil 313 is used to receive control signals to control the movement of the drive rod 311. The drive rod 311 is connected to the trip unit 320 in a transmission connection.

[0051] The drive rod 311 is a rigid actuator of the trip unit 310 that transmits actions to the outside. It is usually a metal rod that can slide or swing axially. The current coil 312 is connected to the stationary contact 130, which means that it is connected in series in the main circuit. When a short circuit or severe overload occurs in the circuit where the stationary contact 130 is located, a large current flows through the current coil 312 to generate a strong magnetic field, which attracts or pushes the iron core to drive the drive rod 311. The voltage coil 313 is independent of the main circuit. Its two ends are connected to the control power supply to receive control signals. After being energized, it also generates a magnetic field to drive the same drive rod 311.

[0052] In summary, the embodiments of the present invention provide an operating mechanism 10, the closing action is divided into two continuous stages: the first stage is the early stage of the closing stroke, at which time the moving contact 120 has not yet contacted the stationary contact 130, the contact seat 110 drives the moving contact 120 to move synchronously, there is no relative displacement between the two, and the position is locked; the second stage is the final stage of the closing stroke, when the moving contact 124 at the front end of the moving contact 120 makes physical contact with the surface of the stationary contact 130, the contact seat 110 continues to be driven by the handle 200 to move. At this time, because the cooperation structure between the moving contact 120 and the contact seat 110 no longer restricts their synchronous movement, the moving contact 120 moves relative to the contact seat 110, thereby compressing or stretching the first elastic element 140, so that it accumulates elastic potential energy; this elastic potential energy is then converted into a force on the moving contact 120, so that the moving contact 120 presses more tightly against the stationary contact 130, thereby increasing the contact pressure between the two. It is evident that the operating mechanism 10 has a simple structure and few parts, which not only facilitates assembly and reduces production costs, but also effectively increases the contact pressure between the moving contact 120 and the stationary contact 130 in the closed state, thus effectively improving the operational stability of the operating mechanism 10.

[0053] Furthermore, this embodiment of the invention also provides a circuit breaker, including the operating mechanism 10 described in the above embodiments.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An operating mechanism, characterized in that, include: A contact assembly (100) includes a contact base (110), a moving contact (120), a stationary contact (130), and a first elastic member (140). The contact base (110) is provided with a slot (111), and the moving contact (120) is partially movably disposed in the slot (111). The first elastic member (140) is connected to the moving contact (120). Handle (200), the handle (200) is connected to the contact seat (110) in a transmission manner, the handle (200) is used to drive the contact seat (110) to move, so as to drive the moving contact (120) and the stationary contact (130) to close or open; During the closing process, the contact seat (110) drives the moving contact (120) to move synchronously, and the moving contact (120) is relatively stationary with respect to the contact seat (110); after the moving contact (120) contacts the stationary contact (130) to close the circuit, the moving contact (120) moves in the slot (111).

2. The operating mechanism according to claim 1, characterized in that, The contact assembly (100) further includes a rotating shaft (150), the contact seat (110) is movably disposed on the rotating shaft (150), the handle (200) is connected to one end of the contact seat (110), the other end of the contact seat (110) is provided with the slot (111), the moving contact (120) is provided with a retaining part (121), and the retaining part (121) is movably disposed in the slot (111).

3. The operating mechanism according to claim 2, characterized in that, The holding part (121) includes a first end (122) and a second end (123). The size of the slot (111) corresponding to the second end (123) is larger than the size of the slot (111) corresponding to the first end (122), so that the second end (123) can rotate around the first end (122).

4. The operating mechanism according to claim 3, characterized in that, One end of the movable contact (120) is provided with a movable contact portion (124), and the other end is provided with a connecting portion (125). The connecting portion (125) is connected to the first elastic member (140). The holding portion (121) is provided between the movable contact portion (124) and the connecting portion (125), and the first end (122) is located near the end of the movable contact portion (124).

5. The operating mechanism according to claim 2, characterized in that, The slot (111) is provided with a limiting part (112), which is used to limit the axial movement of the holding part (121).

6. The operating mechanism according to claim 2, characterized in that, The end of the contact seat (110) is also provided with an arc-blocking surface (113).

7. The operating mechanism according to claim 1, characterized in that, The operating mechanism further includes a tripping assembly (300), which includes a tripping device (310), a tripping member (320), a tripping member (330), and a locking member (340). The handle (200) is connected to the contact seat (110) via the tripping member (330). The tripping member (330) and the locking member (340) are disposed on the contact seat (110) and locked to each other. The tripping device (310) is used to drive the tripping member (320) to move, so as to drive the tripping member (330) and the locking member (340) to release, so as to open the circuit between the moving contact (120) and the stationary contact (130).

8. The operating mechanism according to claim 7, characterized in that, The release assembly (300) further includes a second elastic element (350) that acts on the locking element (340) to keep the locking element (340) and the release element (330) in a locked state.

9. The operating mechanism according to claim 7, characterized in that, The trip unit (310) includes a drive rod (311), and the trip unit (310) also includes at least one of a current coil (312) and a voltage coil (313). The current coil (312) is connected to the stationary contact (130) and is used to drive the drive rod (311) to move when the current in the circuit where the stationary contact (130) is located increases abnormally. The voltage coil (313) is used to receive a control signal to control the movement of the drive rod (311). The drive rod (311) is connected to the trip unit (320) in a transmission connection.

10. A circuit breaker, characterized in that, Includes the operating mechanism as described in any one of claims 1-9.

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