Circuit breaker trip structure

Abstract

The application provides a circuit breaker tripping structure. The circuit breaker tripping structure comprises a circuit breaker and a tripping mechanism installed on the circuit breaker, and the tripping mechanism is additionally arranged on the circuit breaker. The tripping mechanism comprises a tripping rocker, the tripping rocker comprises a pivoted connection end, a free rotation end and a handle connection end, the handle connection end is connected with a handle, the free rotation end is connected with an operating mechanism, and the tripping rocker rotates through the pivoted connection end. When the circuit breaker is opened, the handle drives the handle connection end to drive the tripping rocker to rotate, and the free rotation end of the tripping rocker triggers the operating mechanism to trip to perform the opening operation of the circuit breaker. Through the additionally arranged tripping mechanism, the operating mechanism is directly triggered by the handle to trip when the circuit breaker is opened, and the circuit breaker is rapidly opened through the energy storage spring in the operating mechanism.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker tripping structure. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions and closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is somewhat blurred; generally, those above 3kV are considered high-voltage electrical appliances. Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors. When serious overloads, short circuits, or undervoltage faults occur, they can automatically disconnect the circuit. Their function is equivalent to a combination of a fuse switch and over / under-temperature relays, and generally, no parts need to be replaced after interrupting the fault current. They are now widely used.

[0003] Currently, miniature circuit breakers can achieve rapid closing through energy storage structures, but cannot achieve rapid opening due to space limitations. That is, the breaking speed of the contact system when disconnecting the circuit is related to the speed of operating the disconnect handle. If the circuit is opened slowly, it will cause the circuit breaker contact system to burn out. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide a circuit breaker tripping structure that is fast, safe and stable in performance.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A circuit breaker tripping structure includes a circuit breaker, the circuit breaker including a housing and a handle pivotally connected to the top of the housing, the handle being connected to an operating mechanism, the handle driving the operating mechanism to perform opening and closing operations of the circuit breaker; it also includes a tripping mechanism mounted on the circuit breaker; the tripping mechanism includes a tripping rocker, the tripping rocker including a pivotally connected end, a freely rotatable end and a handle connected end, the handle connected end being connected to the handle, the freely rotatable end being connected to the operating mechanism, and the tripping rocker rotating through the pivotally connected end; when the circuit breaker is opened, the handle driving the handle connected end to drive the tripping rocker to rotate, and the freely rotatable end of the tripping rocker triggers the operating mechanism to trip and perform the circuit breaker opening operation.

[0007] Furthermore, the tripping mechanism is located on the outside side of the circuit breaker housing.

[0008] Furthermore, the circuit breaker's operating mechanism includes a latching latch and a trip latch. When the latch is driven to release its latching engagement with the trip latch, the operating mechanism trips, causing the moving contact to separate from the stationary contact.

[0009] Furthermore, the release rocker includes a first end arm and a second end arm; the pivot connection end is located at the connection between the first end arm and the second end arm, the free rotation end is located at the end of the first end arm, and the handle connection end is located at the end of the second end arm.

[0010] Furthermore, the handle connection end is a first stroke hole opened at the end of the second end arm.

[0011] Furthermore, the free-rotating end is a push rod that extends from the end of the first end arm toward the operating mechanism, and the corresponding position of the housing is provided with a second stroke hole for the operating mechanism into which the push rod extends. The latch of the operating mechanism is provided with a linkage hole that is linked to the push rod.

[0012] Furthermore, the release mechanism also includes a positioning pin, and the handle connection end is movably connected to the handle via the positioning pin.

[0013] Furthermore, the handle connection end is a first stroke hole, the size of which is larger than the size of the positioning pin, so that when the handle drives the circuit breaker to close, the handle drives the positioning pin to move one empty stroke within the first stroke hole.

[0014] Furthermore, the positioning pin includes a positioning pin body and a limiting post extending to one side of the positioning pin body; the positioning pin body is inserted into the handle, and the limiting post is movably connected to the handle connection end.

[0015] Furthermore, the tripping mechanism also includes a fixing plate, which is fixedly installed on one side of the circuit breaker housing, and the pivot connection end of the tripping rocker is pivotally connected to the fixing plate.

[0016] Furthermore, the fixing plate is T-shaped, including a horizontal fixing rod and a vertical fixing rod connected to the middle of the horizontal fixing rod, and the trip rocker is rotatably mounted on the vertical fixing rod; both ends of the horizontal fixing rod extend toward the housing and are provided with fixing protrusions that cooperate with the housing for installation, and the side walls of both ends of the circuit breaker are respectively provided with mounting grooves that cooperate with the fixing protrusions for installation.

[0017] Furthermore, the tripping mechanism also includes a positioning pin and a fixing plate. The movable connecting end is movably connected to the handle through the positioning pin. The fixing plate is fixedly installed on one side of the circuit breaker housing. The pivot connecting end of the tripping rocker is pivotally connected to the fixing plate. The tripping rocker is located between the housing and the fixing plate, and the fixing plate is located below the tripping rocker.

[0018] Furthermore, the operating mechanism includes a connecting rod, a support, a latch, and a jump buckle. The support is rotatably mounted inside the housing. An energy storage spring is connected to the support. The latch and the jump buckle are rotatably mounted on the support and are engaged with each other. The handle is connected to the jump buckle via the connecting rod, and the moving contact is connected to the support.

[0019] Furthermore, or, the operating mechanism includes a rocker arm, a connecting rod, a support, a latch, and a jump catch. The rocker arm and the support are rotatably mounted in the housing. The rocker arm is limited to the support by a rocker arm spring. An energy storage spring is connected to the support. The latch and the jump catch are rotatably mounted on the support and are engaged with each other. The handle is connected to the jump catch by a connecting rod. The moving contact is connected to the rocker arm. The handle is provided with a limiting arm in the housing that slides with the rocker arm.

[0020] In the embodiments of this application, the circuit breaker tripping structure includes a circuit breaker and a tripping mechanism installed on the circuit breaker. A tripping mechanism is added to the circuit breaker. When the circuit breaker is opened, the handle drives the handle connection end to drive the tripping rocker to rotate. The free rotating end of the tripping rocker assists in pushing the operating mechanism to trip and perform the circuit breaker opening operation. Through the added tripping mechanism, when the circuit breaker is opened, the handle directly triggers the operating mechanism to trip. The energy storage spring in the operating mechanism enables the circuit breaker to achieve rapid opening, preventing the circuit breaker from burning out and improving the safety performance of the circuit breaker. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the circuit breaker tripping structure in the embodiment of this application in the closed state;

[0022] Figure 2 This is a schematic diagram of the circuit breaker tripping structure in the embodiment of this application during the opening process;

[0023] Figure 3 This is a schematic diagram of the circuit breaker tripping structure in the embodiment of this application in the open state;

[0024] Figure 4 This is a schematic diagram of the back of the circuit breaker in the embodiment of this application regarding the circuit breaker tripping structure;

[0025] Figure 5 This is a schematic diagram of the internal structure of the circuit breaker in the embodiment of the present application.

[0026] Figure 6 This is a schematic diagram of the circuit breaker sidewall structure of the circuit breaker tripping structure according to an embodiment of this application;

[0027] Figure 7 This is an exploded view of the tripping mechanism of the circuit breaker tripping structure according to an embodiment of this application;

[0028] Figure 8 This is an assembly schematic diagram of the tripping mechanism of the circuit breaker tripping structure according to an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the tripping rocker of the circuit breaker tripping structure according to an embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the fixing plate of the circuit breaker tripping structure in an embodiment of this application. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1 to 10 The provided embodiments further illustrate specific implementations of the circuit breaker tripping structure of this application. The circuit breaker tripping structure of this application is not limited to the descriptions of the following embodiments.

[0032] Currently, miniature circuit breakers can achieve rapid closing through energy storage structures, but rapid opening cannot be achieved due to space limitations. That is, the breaking speed of the contact system when disconnecting the circuit is related to the speed of operating the trip handle; slow opening will cause burnout of the circuit breaker contact system. To address the aforementioned technical problems, this application provides a circuit breaker tripping structure to solve these problems.

[0033] like Figure 1-5 As shown, this application embodiment provides a circuit breaker tripping structure, including a circuit breaker A and a tripping mechanism B installed on the circuit breaker A; the circuit breaker includes a housing and a handle 41 pivotally connected to the top of the housing, the handle 41 is connected to an operating mechanism, and the handle 41 drives the operating mechanism to perform the opening and closing operations of the circuit breaker; the tripping mechanism B includes a tripping rocker 2, the tripping rocker 2 includes a pivotal connection end, a free rotating end and a handle connection end, the handle connection end is connected to the handle 41, the free rotating end is connected to the operating mechanism, and the tripping rocker 2 rotates through the pivotal connection end; when the circuit breaker is opened, the handle 41 drives the handle connection end to drive the tripping rocker 2 to rotate, and the free rotating end of the tripping rocker 2 triggers the operating mechanism to trip and perform the opening operation of the circuit breaker.

[0034] In the embodiments of this application, the circuit breaker tripping structure includes a circuit breaker and a tripping mechanism installed on the circuit breaker. A tripping mechanism is added to the circuit breaker. When the circuit breaker is opened, the handle drives the handle connection end to drive the tripping rocker to rotate. The free rotating end of the tripping rocker pushes the operating mechanism to trip and perform the circuit breaker opening operation. Through the added tripping mechanism, when the circuit breaker is opened, the handle directly triggers the operating mechanism to trip. The energy storage spring in the operating mechanism enables the circuit breaker to achieve rapid opening, preventing the circuit breaker from burning out and improving the safety performance of the circuit breaker.

[0035] The operating mechanism of circuit breaker A includes a latch 43 and a trip latch. When the latch 43 is driven to release its latching engagement with the trip latch, the operating mechanism trips, causing the moving contact to quickly separate from the stationary contact. This is prior art. The improvement of this application lies in the addition of a tripping mechanism, which allows for rapid tripping by directly triggering the operating mechanism through the tripping mechanism caused by the opening swing of the handle. The following description uses two embodiments of the operating mechanism; however, the operating mechanism of this application is not limited to these embodiments.

[0036] For example, one embodiment of the operating mechanism includes a connecting rod, a support member, a latch 43, and a trip latch. The support member is rotatably mounted inside the housing. An energy storage spring is connected to the support member. The latch 43 and the trip latch are rotatably mounted on the support member and engage with each other. The handle 41 is connected to the trip latch via the connecting rod, and the moving contact is connected to the support member. When closing the circuit, the handle 41 drives the support member to rotate via the connecting rod and the trip latch, compressing the energy storage spring and causing the moving contact to swing and contact the stationary contact. When opening the circuit, the handle 41 drives the support member to rotate via the connecting rod and the trip latch, causing the moving contact to swing and separate from the stationary contact. When the latch 43 is driven to release its engagement with the trip latch, the operating mechanism disengages, and the energy storage spring drives the support member to rotate, causing the moving contact to quickly separate from the stationary contact.

[0037] For example, another embodiment of the operating mechanism is as follows: the operating mechanism includes a rocker arm, a connecting rod, a support, a latch 43 and a jumper. The rocker arm and the support are rotatably installed in the housing. The rocker arm is limited to the support by a rocker arm spring. An energy storage spring is connected to the support. The latch 43 and the jumper are rotatably installed on the support and are engaged with each other. The handle 41 is connected to the jumper by a connecting rod. The moving contact is connected to the rocker arm. The handle 41 is provided with a limiting arm in the housing that slides with the rocker arm. When closing the circuit, the handle 41 drives the support to rotate via the linkage and the jumper, compressing the energy storage spring. At the same time, the limit arm of the handle 41 initially limits the rocker arm, preventing it from rotating and compressing the rocker arm spring between the rocker arm and the support. As the handle 41 swings to a certain position, the limit arm releases its restriction on the rocker arm, and the rocker arm spring drives the rocker arm to rotate rapidly, causing the moving contact to swing and contact the stationary contact, thus achieving rapid closing. When opening the circuit, the handle 41 drives the support to rotate via the linkage and the jumper, causing the moving contact to swing and separate from the stationary contact. When the latch 43 is driven to release its engagement with the jumper, the operating mechanism disengages, and the energy storage spring drives the support to rotate, causing the moving contact to quickly separate from the stationary contact.

[0038] It should be noted that the tripping mechanism in this application embodiment is not limited to use in circuit breakers. It can be assembled on one side of a product as an accessory for use in specific situations where the operating speed of the product handle is related, such as in products with dual power converters that rely on a motor for slow tripping. In this application embodiment, when the handle is rotated to the middle position and the circuit breaker contacts have not separated and the final pressure has not disappeared, the tripping rocker arm drives the circuit breaker operating mechanism to unlock and trip, achieving rapid contact disconnection.

[0039] like Figure 1-5As shown, the tripping mechanism B is located on the outer side of the circuit breaker housing. The tripping mechanism B also includes a positioning pin 1 and a fixing plate 3. The handle connection end is movably connected to the handle 41 via the positioning pin 1. The fixing plate 3 is fixedly installed on the outer side of the circuit breaker housing. The pivot connection end of the tripping rocker 2 is pivotally connected to the fixing plate 3. The tripping rocker 2 is located between the housing and the fixing plate 3, and the fixing plate 3 is located below the tripping rocker 2. The handle connection end is movably connected to the handle 41 via the positioning pin 1, and the pivot connection end of the tripping rocker 2 is pivotally connected to the fixing plate 3. The positioning pin 1 and the fixing plate 3 stably install the tripping rocker 2 on the circuit breaker, ensuring stable and reliable installation. The overall structure of the tripping mechanism is simple and compact. It should be noted that the embodiments of this application do not limit the structure of the positioning pin 1, tripping rocker 2, and fixing plate 3 of the tripping mechanism B. When the tripping mechanism B is installed on other products, the structure of the positioning pin 1, tripping rocker 2, and fixing plate 3 can be modified according to the structural characteristics of other products to adapt to them. For example, the fixing plate 3 can be changed into a corresponding housing structure. In addition, the tripping mechanism B in this embodiment can also be set inside the circuit breaker housing, but this requires improvements to the internal structure of the circuit breaker, which is more costly and complex.

[0040] like Figure 7-9 The specific structure of the trip rocker is shown. The trip rocker 2 includes a first end arm 21 and a second end arm 22; a pivot connection end is located at the connection between the first end arm 21 and the second end arm 22, a free-rotating end is located at the end of the first end arm 21, and a handle connection end is located at the end of the second end arm 22. The first end arm 21 and the second end arm 22 of the trip rocker 2 form an obtuse angle with each other. The trip rocker 2 rotates through the pivot connection end, triggers the operating mechanism of the circuit breaker through the rotation of the free-rotating end, and is connected to the handle of the circuit breaker through the handle connection end to link with the handle, thereby making it possible to accelerate the tripping of the circuit breaker. The overall structure of the trip rocker in this embodiment is simple and compact.

[0041] like Figure 7 , 9 As shown, the pivot connection end is a pivot shaft 23 extending toward the housing at the connection between the first end arm 21 and the second end arm 22. Accordingly, a pivot hole that mates with the pivot shaft 23 should also be provided. The pivot hole can be a slot structure or a through hole structure, and the pivot hole can be provided on the circuit breaker housing or on the fixing plate 3.

[0042] like Figure 1 , 7 As shown in Figures 9 and 1, the handle connection end of the release rocker 2 is provided with a first travel hole 221 at the end of the second end arm 22. The first travel hole 221 limits the travel of the handle connection end of the release rocker 2. Preferably, the first travel hole 221 is an elliptical hole or a square hole; however, the specific shape of the first travel hole 221 is not limited in this embodiment.

[0043] like Figure 7-9 As shown, the free-rotating end of the trip rocker 2 is a push rod 211 extending from the end of the first end arm 21 toward the operating mechanism. A second stroke hole 42 is provided at a corresponding position on the housing, allowing the push rod 211 to extend into the operating mechanism inside the housing. The latch 43 of the operating mechanism has a linkage hole 431 that engages with the push rod 211. Preferably, the second stroke hole 42 is an arc-shaped hole. When the trip rocker 2 pivots, the movement trajectory of the push rod 211 of the first end arm 21 is an arc-shaped trajectory, and the movement trajectory of the latch 43 of the circuit breaker's operating mechanism is also an arc-shaped trajectory. Therefore, the second stroke hole 42 is set as an arc-shaped hole, which simultaneously limits the stroke of the push rod 211. The push rod 211 and the pivot shaft 23 are located on opposite sides of the trip rocker 2.

[0044] When the release rocker arm 2 is installed, the pivot shaft 23 is installed in the pivot hole 311 of the fixed plate 3; the limiting post 12 extends into the first stroke hole 221 of the second end arm 22; the push rod 211 of the first end arm 21 passes through the second stroke hole 42 and extends into the housing, and the push rod 211 is inserted into the linkage hole 431 on the lock 43, so as to realize the linkage between the push rod 211 and the operating mechanism.

[0045] like Figure 7 , 8 As shown, in this embodiment, the sliding connection structure between the trip rocker 2 and the handle 41 is as follows: the handle connection end of the trip rocker 2 is movably connected to the handle 41 via a positioning pin 1. Preferably, the size of the first stroke hole 221 is larger than the size of the positioning pin 1, so that when the handle 41 drives the circuit breaker to close, the handle 41 drives the positioning pin 1 to move one empty stroke within the first stroke hole 221, and the trip rocker 2 rotates with the internal operating mechanism of the circuit breaker, and the push rod 211 rotates synchronously with the product operating mechanism, so that the internal operating mechanism of the circuit breaker does not trip and unlock during the product closing process, thus closing smoothly; when the circuit breaker opens, the handle 41 drives the trip rocker 2 to rotate through the handle connection end, and the push rod 211 in the trip rocker 2 rotates accordingly, with a rotation speed faster than the latch 43 of the internal operating mechanism of the circuit breaker. Under the drive of the push rod 211, the latch 43 is driven to release from the latch engagement with the trip latch, causing the circuit breaker to trip, and then swings to the open position with the handle 41. Specifically, preferably, the positioning pin 1 includes a positioning pin body 11 and a limiting post 12 extending to one side of the positioning pin body 11; the positioning pin body 11 is inserted into the handle 41, and the limiting post 12 is movably connected to the handle connection end. The limiting post 12 extends into the first stroke hole 221, which limits the stroke of the limiting post 12. During installation, the positioning pin body 11 is inserted into the corresponding slot of the handle 41, and the limiting post 12 extends into the first stroke hole 221, thus achieving a sliding connection between the handle connection end of the release rocker 2 and the handle 41.

[0046] like Figure 7 , 8 As shown in Figure 10, the fixing plate 3 is fixedly installed on one side of the outside of the circuit breaker housing, and the pivot connection end of the trip rocker 2 is pivotally connected to the fixing plate 3. The trip rocker 2 is located between the circuit breaker housing and the fixing plate 3.

[0047] Specifically, such as Figure 10 The specific structure of the fixing plate 3 is shown. The fixing plate 3 is T-shaped and includes a horizontal fixing rod 32 and a vertical fixing rod 31 connected to the middle of the horizontal fixing rod 32. The vertical fixing rod 31 is provided with a pivot hole 311 that pivotally engages with the pivot shaft 23 of the release rocker 2. The pivot shaft 23 is installed in the pivot hole 311 of the fixing plate 3, realizing the pivotal installation of the release rocker 2. The shape and size of the fixing plate 3 are not limited in this embodiment, and can be adjusted according to the actual situation.

[0048] like Figure 6 , 10 As shown, the two ends of the transverse fixing rod 32 extend toward the housing and are provided with fixing protrusions 321 that are installed and cooperate with the housing. The two side walls of the circuit breaker are respectively provided with mounting grooves 421 that are installed and cooperate with the fixing protrusions 321. During installation, the pivot shaft 23 is installed in the pivot hole 311 of the fixing plate 3 to realize the pivot installation of the trip rocker arm 2. The fixing protrusions 321 at both ends of the transverse fixing rod 32 face the side of the circuit breaker housing. Pressing the transverse fixing rod 32 downwards presses the fixing protrusions 321 at both ends of the transverse fixing rod 32 into the mounting grooves 421 on the side walls of the two ends of the circuit breaker.

[0049] The following is in conjunction with the appendix Figure 1-3 This application describes the process by which the circuit breaker tripping structure accelerates the circuit breaker's opening:

[0050] like Figure 1 As shown, the circuit breaker is in the closed position. The handle is facing left.

[0051] like Figure 2 As shown, when tripping is required, the handle 41 is moved to the right. The handle 41 drives the first stroke hole 221 to rotate the trip rocker 2. The push rod 211 of the trip rocker 2 drives the circuit breaker's operating mechanism to operate. When the handle is rotated to the middle position, if the circuit breaker contacts are not separated and the final pressure has not disappeared, the trip rocker drives the circuit breaker's operating mechanism to trip, achieving rapid contact disconnection.

[0052] like Figure 3 As shown, the circuit breaker is in the open position. The handle is facing to the right.

[0053] The following is in conjunction with the appendix Figure 1-10 This application describes the entire process of assembling the circuit breaker tripping structure onto one side of the circuit breaker:

[0054] First, the positioning pin body 11 is inserted into the corresponding slot of the handle 41, and the limiting pin 12 extends into the first stroke hole 221, so as to achieve the sliding connection between the handle connection end of the release rocker 2 and the handle 41.

[0055] Next, when the release rocker arm 2 is installed, the limiting post 12 extends into the first stroke hole 221 of the second end arm 22; the push rod 211 of the first end arm 21 passes through the second stroke hole 42 and extends into the housing, and the push rod 211 is inserted into the linkage hole 431 on the lock 43, so that the push rod 211 and the operating mechanism can be linked and cooperated.

[0056] Finally, the fixing plate 3 is installed on the housing, the pivot shaft 23 is installed in the pivot hole 311 of the fixing plate 3, the fixing protrusions 321 at both ends of the transverse fixing rod 32 face one side of the circuit breaker housing, press the transverse fixing rod 32 downward, and press the fixing protrusions 321 at both ends of the transverse fixing rod 32 into the mounting grooves 421 on the side walls of the circuit breaker.

[0057] The embodiments of this application provide an additional tripping mechanism to the operating mechanism of the circuit breaker when the circuit breaker trips, thereby enabling the circuit breaker to trip quickly, preventing the circuit breaker from burning out, and improving the safety performance of the circuit breaker.

[0058] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A circuit breaker tripping structure, comprising a circuit breaker (A), the circuit breaker (A) comprising a housing and a handle (41) pivotally connected to the top of the housing, the handle (41) being connected to an operating mechanism, the handle (41) driving the operating mechanism to swing the moving contact to contact or separate from the stationary contact, thereby performing the opening and closing operation of the circuit breaker; Its features are: It also includes a tripping mechanism (B) installed on the circuit breaker (A), the tripping mechanism (B) being located on the outside side of the circuit breaker housing; the tripping mechanism (B) includes a tripping rocker (2), the tripping rocker (2) including a pivot connection end, a free rotation end and a handle connection end, the handle connection end being movably connected to the handle (41) of the circuit breaker (A) through a positioning pin (1), the free rotation end being connected to the operating mechanism, and the tripping rocker (2) rotating through the pivot connection end; The handle connection end is a first stroke hole (221). The size of the first stroke hole (221) is larger than the size of the positioning pin (1). When the handle (41) drives the circuit breaker to close, the handle (41) drives the positioning pin (1) to move one empty stroke in the first stroke hole (221). When the circuit breaker opens, the handle (41) of the circuit breaker (A) drives the handle connection end to drive the trip rocker (2) to rotate. The free rotation end of the trip rocker (2) triggers the operating mechanism to trip and perform the circuit breaker opening operation.

2. The circuit breaker tripping structure according to claim 1, characterized in that: The operating mechanism of the circuit breaker (A) includes a latch (43) and a trip latch. When the latch (43) is driven to release its latching engagement with the trip latch, the operating mechanism trips and causes the moving contact to separate from the stationary contact.

3. The circuit breaker tripping structure according to claim 1, characterized in that: The trip rocker arm (2) includes a first end arm (21) and a second end arm (22); The pivot connection end is located at the connection between the first end arm (21) and the second end arm (22), the free rotation end is located at the end of the first end arm (21), and the handle connection end is located at the end of the second end arm (22).

4. The circuit breaker tripping structure according to claim 3, characterized in that: The handle connection end is the first stroke hole (221) opened at the end of the second end arm (22).

5. The circuit breaker tripping structure according to claim 3, characterized in that: The free-rotating end is a push rod (211) extending from the end of the first end arm (21) toward the operating mechanism. The corresponding position of the housing is provided with a second stroke hole (42) for the push rod (211) to extend into the housing. The latch (43) of the operating mechanism is provided with a linkage hole (431) that is linked to the push rod (211).

6. The circuit breaker tripping structure according to claim 1, characterized in that: The positioning pin (1) includes a positioning pin body (11) and a limiting post (12) extending to one side of the positioning pin body (11); the positioning pin body (11) is inserted into the handle (41), and the limiting post (12) is movably connected to the handle connection end.

7. The circuit breaker tripping structure according to claim 1, characterized in that: The tripping mechanism (B) also includes a fixing plate (3), which is fixedly installed on one side of the outer casing of the circuit breaker, and the pivot connection end of the tripping rocker (2) is pivotally connected to the fixing plate (3).

8. The circuit breaker tripping structure according to claim 7, characterized in that: The fixing plate (3) is T-shaped and includes a transverse fixing rod (32) and a longitudinal fixing rod (31) vertically connected to the middle of the transverse fixing rod (32). The trip rocker (2) is rotatably mounted on the longitudinal fixing rod (31). The two ends of the transverse fixing rod (32) extend toward the housing and are provided with fixing protrusions (321) that are installed and cooperate with the housing. The two side walls of the circuit breaker are respectively provided with mounting grooves (421) that are installed and cooperate with the fixing protrusions (321).

9. The circuit breaker tripping structure according to claim 1, characterized in that: The operating mechanism includes a connecting rod, a support, a latch (43) and a jump buckle. The support is rotatably installed inside the housing. The energy storage spring is connected to the support. The latch (43) and the jump buckle are rotatably installed on the support and are fastened together. The handle (41) is connected to the jump buckle through the connecting rod. The moving contact is connected to the support. Alternatively, the operating mechanism includes a rocker arm, a connecting rod, a support, a latch (43), and a jump buckle. The rocker arm and the support are rotatably mounted in the housing. The rocker arm is limited to the support by a rocker arm spring. The energy storage spring is connected to the support. The latch (43) and the jump buckle are rotatably mounted on the support and are engaged with each other. The handle (41) is connected to the jump buckle by a connecting rod. The moving contact is connected to the rocker arm. The handle (41) is provided with a limiting arm in the housing that slides with the rocker arm.

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