circuit breaker

Abstract

A circuit breaker comprises a housing, an operating mechanism and an indicating device arranged in the housing, the operating mechanism comprises a snap-fitted trip member and a lock member, the indicating device comprises an alarm indicating member and a second elastic member, the alarm indicating member is rotatably arranged in the housing, the second elastic member acts on the alarm indicating member, the alarm indicating member is provided with an alarm indicating surface, when the circuit breaker is tripped and opened, the trip member and the lock member are disengaged from the snap-fitting, the trip member or the lock member drives the alarm indicating member to rotate, so that the alarm indicating surface corresponds to an indicating window, and the tripped and opened state of the circuit breaker can be indicated.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0002] The existing plug-in circuit breakers have the following technical problems.

[0003] 1. Existing circuit breakers have limited space and are mostly designed with single-break contact mechanisms, which have limited breaking capacity and cannot be used for excessively high voltages.

[0004] 2. The existing circuit breaker has its incoming and outgoing terminals facing each other, with the operating device located on the outgoing terminal side. The conductor and the operating device are located on the same side, which is inconvenient for users to operate and poses certain operational safety hazards.

[0005] 3. The circuit breaker's incoming line is not pluggable, and the outgoing line is connected by a wire, making wiring inconvenient.

[0006] 4. Most of the auxiliary contacts and / or alarm contacts of existing circuit breakers are independent modules that are spliced ​​on one side of the circuit breaker to monitor the status of the circuit breaker. After splicing, the circuit breaker is thicker and occupies space in the circuit breaker installation cabinet.

[0007] 5. Existing rotary double-break types do not have an arc-initiating plate on the moving contact side or have an independent arc-initiating plate, and their arc-initiating function is generally poor.

[0008] 6. Existing circuit breaker indicator devices can only indicate the circuit breaker's open / closed status, but cannot indicate the alarm status of tripped circuit breakers, or the indicator device structure is relatively complex and occupies a large space.

[0009] The purpose of this invention is to solve at least one of the above-mentioned technical problems. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circuit breaker.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A circuit breaker includes a housing and an operating mechanism and an indicating device disposed within the housing. The operating mechanism includes a tripping fastener and a locking fastener that engage with each other. The indicating device includes an alarm indicator and a second elastic element. The alarm indicator is rotatably mounted within the housing. The second elastic element acts on the alarm indicator. The alarm indicator has an alarm indicating surface. When the circuit breaker trips, the tripping fastener and the locking fastener disengage, and the tripping fastener or the locking fastener drives the alarm indicator to rotate, so that the alarm indicating surface aligns with the indicating window.

[0013] Preferably, an operating element for driving the circuit breaker to open and close is provided on the end face of one end of the housing, and a moving contact assembly is provided inside the housing. The operating mechanism includes a lever, a trip fastener, and a locking fastener. The moving contact assembly includes a moving contact and a contact shaft. The contact shaft is rotatably installed inside the housing, and the moving contact is disposed on the contact shaft. The trip fastener and the locking fastener are rotatably installed on the contact shaft and are engaged with each other. The lever is rotatably installed inside the housing. The trip fastener is connected to the lever through a first connecting member, and the lever is connected to the operating element through a second connecting member.

[0014] Preferably, the indicating device further includes a circuit breaker closing indicator and a first elastic element. The circuit breaker closing indicator is rotatably installed in the housing. The first elastic element acts on the circuit breaker closing indicator. The circuit breaker closing indicator has a circuit breaker closing indicator surface. When the circuit breaker is closed or opened, the operating element or operating mechanism or contact shaft drives the circuit breaker closing indicator so that the circuit breaker closing indicator surface corresponds to the indicating window, indicating the circuit breaker closing status.

[0015] Preferably, when the circuit breaker is closed or opened, the lever rotates to drive the closing / opening indicator, so that the closing indicator area or opening indicator area on the closing / opening indicator surface corresponds to the indicator window. When the circuit breaker is opened or closed, the lever rotates to separate from the closing / opening indicator, and the first elastic element drives the closing / opening indicator to reset, so that the opening indicator area or closing indicator area on the closing indicator surface corresponds to the indicator window.

[0016] Preferably, the rotation axes of the opening / closing indicator and the alarm indicator are concentrically arranged.

[0017] Preferably, the first elastic element and the second elastic element are the same elastic element.

[0018] Preferably, the circuit breaker indicator has a first pivot part in the middle, one end of which is a first swing arm and the other end of which is a first indicator arm. The end of the first indicator arm is provided with an arc-shaped circuit breaker indicator surface. The alarm indicator has a second pivot part in the middle, one end of which is a second swing arm and the other end of which is a second indicator arm. The end of the second indicator arm is provided with an arc-shaped alarm indicator surface. The same elastic element as the first elastic element and the second elastic element is an indicator spring, which is installed between the first pivot part and the second pivot part.

[0019] Preferably, one of the first pivoting part and the second pivoting part is provided with a spring mounting groove, and the other is provided with a spring mounting boss. Both the spring mounting groove and the spring mounting boss are provided with pivot holes for the rotating shaft to pass through. The indicator spring is sleeved on the spring mounting boss, and the spring mounting boss is correspondingly mounted in the spring mounting groove. The elastic arm of the indicator spring acts on the opening and closing indicator and the alarm indicator, respectively.

[0020] Preferably, the closing and opening indicator surface is provided with a closing indicator area and a closing indicator area, which are set at different heights to form a stepped structure. The alarm indicator surface can rotate to block the closing or opening indicator area at the lower part of the stepped structure and is limited by the side wall of the stepped structure.

[0021] Preferably, the indicating device further includes a rocker arm and a slider, as well as a first return spring and a second return spring. The rocker arm is rotatably disposed within the housing, the first return spring acts on the rocker arm, the slider is slidably disposed within the housing, and the second return spring acts on the slider. When the circuit breaker is closed, the operating element or operating mechanism or moving contact assembly can drive the slider to move, causing the slider to drive the alarm indicator away from the indicating window, and the slider is limited to the rocker arm. When the circuit breaker is tripped, the trip fastener and locking fastener release their latching engagement, the trip fastener or locking fastener pushes the rocker arm to move, causing the rocker arm to release its limitation on the slider, the second return spring drives the slider to move to avoid the alarm indicator, and the second elastic element drives the alarm indicator to correspond with the indicating window.

[0022] Preferably, the slider includes a slider body and a trigger arm arranged in a T-shape. The slider body is linearly slidably installed in the housing. One end serves as a first driving part that cooperates with the second reset spring, and the other end serves as a first limiting part that cooperates with the swing arm limit. The trigger arm is connected to the middle of the slider body. An alarm contact is installed on one side of the trigger arm along the sliding direction of the slider. One side of the trigger arm serves as a first trigger part that drives the alarm indicator, and the other side of the trigger arm serves as a second driving part.

[0023] Preferably, the rocker arm is provided with a second limiting part that cooperates with the slider limiting part, a second triggering part that cooperates with the locking fastener or the jumping fastener, and a first driving part that cooperates with the first return spring. The rocker arm is provided with a first rocker arm and a second rocker arm respectively. The end of the first rocker arm serves as the second limiting part, the second rocker arm is provided with a limiting structure as the first driving part that cooperates with the first return spring, and one side of the second rocker arm serves as the second triggering part.

[0024] Preferably, the jump fastener has a protruding jump hook that engages with the locking fastener. The locking fastener has a notch on the side near the jump fastener to form a locking platform. The locking elastic element drives the locking fastener to rotate towards the jump fastener so that the locking platform engages with the jump hook. After the jump fastener releases its engagement with the locking fastener, the jump fastener pushes the locking fastener to accelerate the movement of the swing rod.

[0025] The circuit breaker of this invention is equipped with an indicator device. When the circuit breaker trips and opens, the tripping fastener and the locking fastener release their latching engagement. The tripping fastener or the locking fastener drives the alarm indicator to rotate, so that the alarm indicator surface corresponds to the indicator window, which can indicate the tripping and opening status of the circuit breaker and is used to realize fault alarm.

[0026] In addition, the indicating device is also equipped with a closing / opening indicator. When the circuit breaker is closed or opened, the operating element, operating mechanism, or contact shaft drives the closing / opening indicator, so that the surface of the indicator aligns with the indicating window, indicating the closing / opening status. In particular, the rotation axes of the closing / opening indicator and the alarm indicator are concentrically arranged and driven by the same elastic element.

[0027] In addition, the trip fastener or locking fastener drives the alarm indicator through a limit-locking lever and slider, which is reliable and will not affect the normal opening and closing of the circuit breaker. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the external structure of the circuit breaker created in this invention;

[0029] Figure 2-3 This is a schematic diagram of the internal structure of the circuit breaker created in this invention;

[0030] Figure 4 This is a schematic diagram of the arc-initiating component created by the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of the circuit breaker created by the present invention after removing the contact shaft;

[0032] Figure 6-9 This is a schematic diagram of the structure of a first embodiment of the circuit breaker indicating device of the present invention;

[0033] Figure 10-13 This is a schematic diagram of the structure of Embodiment 2 of the circuit breaker indicating device of the present invention;

[0034] Figure 14-16 This is a structural schematic diagram of an embodiment of the circuit breaker alarm contact device and auxiliary contact device created by the present invention. Detailed Implementation

[0035] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the circuit breaker created by the present invention. The circuit breaker created by the present invention is not limited to the descriptions of the following embodiments.

[0036] like Figure 1-2As shown, this embodiment is a pluggable circuit breaker, including a housing with a flat, elongated hexahedral structure. One end face of the housing is provided with an operating component 1 for driving the circuit breaker to open and close. The opposite end face is provided with an incoming terminal 13-1 and an outgoing terminal 13-2. A locking mechanism 2 for locking with the cabinet is provided on the side face between the end face with the operating component 1 and the end face with the incoming terminal 13-1 and the outgoing terminal 13-2. The operating component 1 has an operating surface on one end, which extends out of the housing for operation. The operating surface has an inlet terminal 13-1 and an outlet terminal 13-2 as the inlet / outlet end face, which is opposite to the operating surface. An indicator window 19 is also provided on the operating surface. The inlet terminal 13-1 and the outlet terminal 13-2 are located at the same end and are both pluggable terminals. The pluggable interface of the inlet / outlet end face is U-shaped and is used for plugging and connecting with an external copper busbar. A locking mechanism 2 is provided on the side perpendicular to the inlet / outlet end face and the operating surface for locking with the cabinet.

[0037] The circuit breaker housing also includes an operating mechanism, a moving contact assembly, a stationary contact assembly, an arc extinguishing mechanism, and a protection mechanism. The protection mechanism includes a short-circuit protection device 10 and / or an overload protection device 11 and / or a leakage current protection mechanism. The operating mechanism is connected to the operating element 1, and the moving contact assembly is connected to the operating mechanism. The operating element 1 drives the operating mechanism to make the moving contact assembly contact or separate from the stationary contact assembly to realize the opening and closing of the circuit breaker. When a short-circuit fault occurs in the circuit, the short-circuit protection device 10 triggers the operating mechanism to trip, causing the circuit breaker to trip and open to realize circuit protection. Correspondingly, when an overload or leakage current fault occurs in the circuit, the overload protection device 11 or the leakage current protection mechanism drives the circuit breaker to trip and open.

[0038] In this embodiment, the pluggable circuit breaker is integrally installed inside the cabinet. One end, equipped with an inlet terminal 13-1 and an outlet terminal 13-2, is inserted into the cabinet and connected to the copper busbar inside. Both inlet and outlet terminals 13-1 and 13-2 are plug-in terminals, each including a clamping spring for holding the copper busbar inside the cabinet. Two sets of U-shaped terminal slots are provided on the upper and lower sides of the inlet and outlet terminals, each containing a clamping spring for the inlet terminal 13-1 and outlet terminal 13-2, respectively. The operating surface is located outside the cabinet. The circuit breaker is opened and closed by driving the operating component 1 to protect the circuit. The locking mechanism 2 includes a locking protrusion that can extend outside the housing and retract inside. The locking protrusion engages with the frame slot on the cabinet for secure fixing. Operating the pull-out unlocking mechanism allows the locking protrusion to retract into the housing, facilitating the insertion and removal of the circuit breaker. In this embodiment, the operating component 1 is a button mechanism, which is linearly mounted on the housing. Alternatively, it can be configured as a pivotally mounted handle mechanism as needed. The indicator window 19 is located on the operating surface and below the operating component 1. Alternatively, the indicator window 19 can be located on the operating component 1 or other parts of the housing as needed. In this embodiment, the operating component 1 serves as the unlocking mechanism for the locking mechanism 2. The locking mechanism 2 is connected to the operating component 1 via an unlocking link 2-1. Pressing the operating component 1 closes the circuit breaker, and pulling the operating component 1 opens the circuit breaker. After opening, pulling the operating component 1 again causes the locking protrusion of the locking mechanism 2 to retract into the housing via the unlocking link 2-1, allowing the circuit breaker to be removed. Alternatively, a separate unlocking mechanism can be provided to unlock the locking mechanism 2 as needed.

[0039] The operating mechanism of this embodiment includes a lever 3, a jump fastener 5, and a locking fastener 4. The moving contact assembly includes a moving contact 7, and the stationary contact assembly includes a first stationary contact 8-1 and a second stationary contact 8-2. The contact shaft 6 is rotatably installed in the housing and located between the first stationary contact 8-1 and the second stationary contact 8-2. The moving contact 7 is disposed on the contact shaft 6 and has a first contact point 7-1 and a second contact point 7-2 at both ends that cooperate with the first stationary contact 8-1 and the second stationary contact 8-2, respectively. The jump fastener 5 and the locking fastener 4 are rotatably installed on the contact shaft 6 and are fastened together. The lever 3 is rotatably installed in the housing. The jump fastener 5 is connected to the lever 3 through a first connecting member 3-1, and the lever 3 is connected to the operating member 1 through a second connecting member 1-1.

[0040] like Figure 2In the aforementioned direction, pressing the operating component 1 causes the lever 3 to rotate via the second connecting component 1-1. The lever 3 then drives the contact shaft 6 to rotate clockwise via the first connecting component 3-1 and the jump fastener 5, causing the moving contact 7 to contact the first stationary contact 8-1 and the second stationary contact 8-2 to close the circuit and achieve circuit breaker closing. Pulling the operating component 1 causes the lever 3 to rotate in the opposite direction via the second connecting component 1-1. The lever 3 then drives the contact shaft 6 to rotate counterclockwise via the first connecting component 3-1 and the jump fastener 5, causing the moving contact 7 to separate from the first stationary contact 8-1 and the second stationary contact 8-2 to disconnect the circuit and achieve circuit breaker tripping. When a short circuit fault occurs in the circuit, the protection mechanism activates the locking component 4, releasing the latching engagement between the locking component 4 and the jump fastener 5. This causes the contact shaft 6 to rotate counterclockwise under the drive of the return spring, causing the moving contact 7 to separate from the first stationary contact 8-1 and the second stationary contact 8-2 to disconnect the circuit and achieve circuit breaker tripping.

[0041] The pluggable circuit breaker of this invention has an operating component 1 for driving the circuit breaker to open and close on one end face of the housing, and an incoming terminal 13-1 and an outgoing terminal 13-2 on the opposite end face. It adopts a double-break contact mechanism structure, which realizes the wiring of the incoming terminal 13-1 and the outgoing terminal 13-2 at the same time as inserting it into the cabinet. It is convenient for users to operate and has high safety, and also improves the breaking capacity, making it suitable for circuits with high voltage.

[0042] like Figure 3 As shown, the contact structure of the circuit breaker in this embodiment is a rotary double-break structure. The contact shaft 6 is rotatably installed inside the housing and rotates around its axial direction. A moving contact mounting hole is provided radially on the contact shaft 6. The moving contact 7 passes through the moving contact mounting hole and extends out of the contact shaft 6 at both ends. The moving contact 7 is elastically fixed to the contact shaft 6 by an elastic element to achieve overtravel. A first contact point 7-1 and a second contact point 7-2 are respectively provided on different sides at both ends of the moving contact 7. A first mounting structure for mounting the jump fastener 5 and the locking fastener 4 is provided on the contact shaft 6. The first mounting structure is a rotating shaft or a rotating hole.

[0043] The jump fastener 5 is rotatably mounted on the contact shaft 6. The jump fastener 5 has a protruding jump hook 5-2 that engages with the locking fastener 4 and a first connecting hole that connects to the first connecting member 3-1. The locking fastener 4 is rotatably mounted on the contact shaft 6 at its center. A notch is provided on the side of the locking fastener 4 near the jump fastener 5 to form a locking platform 4-5. A locking elastic member 4-2 is mounted on the contact shaft 6, driving the locking fastener 4 to rotate towards the jump fastener 5 so that the locking platform 4-5 engages with the jump hook 5-2. A locking drive arm 4 extends from one end of the locking fastener 4. -1. One side of the latching drive arm 4-1 faces the short-circuit protection device 10 as the first tripping part 4-4, and the other side serves as the latching drive part 4-7. The short-circuit protection device 10 drives the latching member 4 to rotate through the first tripping part 4-4, causing the latching member 4 and the tripping member 5 to disengage. The other end of the latching member 4 is equipped with a tripping link 4-6, which corresponds to the bimetallic strip of the overload protection device 11 as the second tripping part. The bimetallic strip pulls the latching member 4 to rotate through the tripping link 4-6, causing the latching member 4 and the tripping member 5 to disengage. The first connecting member 3-1 and the second connecting member 1-1 are U-shaped rods. The circuit breaker created by this invention adopts a rotary double-break structure for the contact structure, which improves the breaking capacity of the circuit breaker. Moreover, by rotatably mounting the tripping member 5 and the latching member 4 on the contact shaft 6 where the double-break moving contact 7 is set, the space occupied by the operating mechanism and the contact shaft 6 is reduced.

[0044] like Figure 2 , 4 As shown in Figure 5, the first stationary contact 8-1 and the second stationary contact 8-2 are arranged on both radial sides of the contact shaft 6. The arc extinguishing mechanism includes a first arc extinguishing mechanism and a second arc extinguishing mechanism, which are respectively arranged corresponding to the first stationary contact 8-1 and the second stationary contact 8-2. When the circuit breaker trips or is tripped, the arc generated between the first contact point 7-1 of the moving contact 7 and the first stationary contact 8-1 is extinguished by the first arc extinguishing mechanism, and the arc generated between the second contact point 7-2 and the second stationary contact 8-2 is extinguished by the second arc extinguishing mechanism.

[0045] The first arc-extinguishing mechanism includes a first arc-extinguishing chamber and a first arc-initiating plate 23-2. The second arc-extinguishing mechanism includes a second arc-extinguishing chamber and a second arc-initiating plate 23-1. Multiple arc-extinguishing grid plates are respectively provided in the first and second arc-extinguishing chambers. The first arc-initiating plate 23-2 and the second arc-initiating plate 23-1 are connected by a connecting plate 23-3 to form an arc-initiating assembly. The first contact point 7-1 of the moving contact 7 mates with the first stationary contact 8-1 at the inlet end of the first arc-extinguishing chamber, and the second contact point 7-2 mates with the second stationary contact 8-2 in the second arc-extinguishing chamber. When the circuit breaker is tripped, the moving contact 7 drives the first contact point 7-1 and the second contact point 7-2 at both ends to rotate towards the first arc-inducing plate 23-2 and the second arc-inducing plate 23-1, respectively. The arc on the moving contact 7 is introduced into the first arc-extinguishing chamber and the second arc-extinguishing chamber through the first arc-inducing plate 23-2 and the second arc-inducing plate 23-1, respectively. When the moving contact 7 is broken, the arc on the moving contact 7 can be transferred to the two arc-inducing plates, thereby forming two arcs in series between the incoming and outgoing line circuits, improving the current limiting capacity and breaking speed.

[0046] The first arc-initiating plate 23-2 and the second arc-initiating plate 23-1 both include an arc-initiating base plate. The arc-initiating base plate is disposed on one side of the corresponding arc-extinguishing chamber and extends from the inlet end of the arc-extinguishing chamber to the other end away from the moving contact assembly, that is, from the inlet end of the arc-extinguishing chamber to the exhaust end of the other end, so as to introduce the arc from the moving contact 7 into the arc-extinguishing chamber to cut and extinguish the arc.

[0047] Preferably, one end of the first stationary contact 8-1 and the second stationary contact 8-2 is provided with a stationary contact point, and the other end is provided with a first extension section 8-3 and a second extension section 8-4, respectively. The first extension section 8-3 and the second extension section 8-4 extend to the end of the first arc-extinguishing chamber and the second arc-extinguishing chamber away from the moving contact assembly, that is, from the inlet end of the arc-extinguishing chamber to the exhaust end of the other end, so as to transfer the arc from the stationary contact point to the extension end and introduce it into the arc-extinguishing chamber to cut and extinguish the arc. The first extension section 8-3 is arranged opposite to the arc-ignition base plate of the first arc-ignition piece 23-2 and is located on both sides of the first arc-extinguishing chamber. The second extension section 8-4 is arranged opposite to the arc-ignition base plate of the second arc-ignition piece 23-1 and is located on both sides of the second arc-extinguishing chamber. The two arc-extinguishing chambers are respectively arranged between the two sets of extension sections and the arc-ignition base plates.

[0048] Preferably, the connecting plate 23-3 is stacked with the contact shaft 6 and located at one end of the axial direction of the contact shaft 6, such as... Figure 2 , 5 As shown, the connecting plate 23-3 is located below the contact shaft 6. Figure 5 A schematic diagram of the structure for removing the contact shaft 6.

[0049] like Figure 4As shown, a preferred embodiment of the arc-initiating assembly of the arc-extinguishing mechanism includes a first arc-initiating plate 23-2, a second arc-initiating plate 23-1, and a connecting plate 23-3 connecting the first arc-initiating plate 23-2 and the second arc-initiating plate 23-1. The first arc-initiating plate 23-2 and the second arc-initiating plate 23-1 each include an arc-initiating base plate and two arc-initiating sidewalls located on opposite sides of one end of the arc-initiating base plate. The arc-initiating base plate is disposed on one side of the corresponding arc-extinguishing chamber and extends from the inlet end of the arc-extinguishing chamber to the other end away from the moving contact assembly. The two arc-initiating sidewalls are disposed opposite each other on opposite sides of the inlet end of the arc-extinguishing chamber. The two arc-initiating sidewalls are respectively connected to the sides of one end of the arc-initiating base plate. The arc-initiating sidewalls can increase the magnetic blow-out capability of the arc region, further propelling the arc towards the arc-extinguishing chamber. Preferably, the outer side of the arc-initiating sidewalls is wrapped with an insulating layer, which can be an insulating plastic made of a gas-generating material. The insulating layer can isolate the arc, and the high-temperature gas generation by the insulating plastic further propels the arc towards the arc-extinguishing chamber through airflow. That is, the arc-initiating base plate of the first arc-initiating plate 23-2 is disposed on one side of the first arc-extinguishing chamber and extends from the entrance end of the first arc-extinguishing chamber to the other end away from the moving contact assembly, and the two arc-initiating sidewalls of the first arc-initiating plate 23-2 are disposed opposite to each other on both sides of the entrance end of the first arc-extinguishing chamber; the arc-initiating base plate of the second arc-initiating plate 23-1 is disposed on one side of the second arc-extinguishing chamber and extends from the entrance end of the second arc-extinguishing chamber to the other end away from the moving contact assembly, and the two arc-initiating sidewalls of the second arc-initiating plate 23-1 are disposed opposite to each other on both sides of the entrance end of the second arc-extinguishing chamber.

[0050] The arc-initiating base plate is parallel to the arc-extinguishing grid plate of the corresponding arc-extinguishing chamber, and the arc-initiating sidewall is perpendicular to the arc-initiating base plate. The plane where the connecting plate 23-3 is located is perpendicular to the arc-initiating base plate and parallel to the arc-initiating sidewall, which facilitates assembly on the lower side of the contact shaft 6. The arc-initiating assembly can be integrally bent and formed, or it can be welded from multiple components.

[0051] like Figure 2As shown, in this embodiment of the circuit breaker, the operating element 1 is located at one end of the housing, and the incoming terminal 13-1 and the outgoing terminal 13-2 are located at the other end of the housing. The end face with the operating element 1 is the operating surface, and the end face with the incoming terminal 13-1 and the outgoing terminal 13-2 is the incoming and outgoing end face. The overload protection device 11 and the contact shaft 6 are arranged side by side in the middle of the housing. The lever 3, the first stationary contact 8-1 and the first arc extinguishing mechanism are arranged side by side and located between the operating surface and the contact shaft 6. The lever 3 is located between the operating element 1 and the contact shaft 6. The second stationary contact 8-2, the second arc extinguishing mechanism and the short-circuit protection device 10 are arranged side by side between the contact shaft 6 and the incoming and outgoing end faces. The first stationary contact 8-1, the short-circuit protection device 10, and the incoming terminal 13-1 are sequentially arranged on the upper side of the housing width direction along the direction from the operating surface to the incoming and outgoing end face. The operating element 1, the lever 3, the overload protection device 11, the second stationary contact 8-2, and the outgoing terminal 13-2 are sequentially arranged on the lower side of the housing width direction along the direction from the operating surface to the incoming and outgoing end face. The first arc extinguishing mechanism, the contact shaft 6, and the second arc extinguishing mechanism are sequentially arranged on the middle side of the housing width direction along the direction from the operating surface to the incoming and outgoing end face. In this embodiment, the main circuit of the circuit breaker is electrically connected sequentially through the incoming terminal 13-1, the short-circuit protection device 10, the first stationary contact 8-1, the moving contact 7, the second stationary contact 8-2, the overload protection device 11, and the outgoing terminal 13-2. Of course, as another embodiment, the positions and connection order of the short-circuit protection device 10 and the overload protection device 11 can be interchanged. That is, the short-circuit protection device 10 and the contact shaft 6 are arranged side by side in the middle of the housing, and the second stationary contact 8-2, the second arc-extinguishing mechanism, and the overload protection device 11 are arranged side by side between the contact shaft 6 and the inlet and outlet end faces. As another embodiment, the positions of the inlet terminal 13-1 and the outlet terminal 13-2 can also be interchanged. Figure 2 The directions shown are as follows: from the operating face to the incoming / outgoing line end face is the length direction of the circuit breaker; from the incoming terminal 13-1 to the outgoing terminal 13-2 is the width direction of the circuit breaker; perpendicular to... Figure 2 The direction of the plane shown is the thickness direction of the circuit breaker.

[0052] Preferably, the circuit breaker housing is further provided with a current sampling device 12-1 and / or a temperature sampling device 12-2, etc. The current sampling device 12-1 and / or the temperature sampling device 12-2 are connected to a signal port 21, and the sampling signal is transmitted externally through the signal port 21. The signal port 21 is located on the input and output end face, preferably between the input terminal 13-1 and the output terminal 13-2. The current sampling device 12-1 is connected to the main circuit. Preferably, the current sampling device 12-1 is located close to the input and output end face, between the input terminal 13-1 and the short-circuit protection device 10. In this embodiment, the current sampling device 12-1 is a current transformer, but it can also be a manganese copper shunt or other circuit sampling device. The temperature sampling device 12-2 is located near the incoming terminal 13-1 and the outgoing terminal 13-2. The temperature sampling device 12-2 can be a thermistor, with two thermistors respectively positioned close to the incoming terminal 13-1 and the outgoing terminal 13-2. Temperature sampling signals are transmitted through the signal port 21. The pluggable circuit breaker of this invention has a reasonable layout, incorporating a short-circuit protection device 10, an overload protection device 11, a current sampling device 12-1, and a temperature sampling device 12-2, thus fulfilling more functional requirements within a limited space.

[0053] An improvement of this invention is that the circuit breaker is also equipped with an indicator device that can indicate the tripping and opening status of the circuit breaker.

[0054] like Figure 6-9 As shown in Embodiment 1, the indicating device includes an alarm indicator 14 and a second elastic element. The alarm indicator 14 is rotatably mounted inside the housing. The second elastic element acts on the alarm indicator 14. The alarm indicator 14 has an alarm indicating surface 14-2. When the circuit breaker trips, the trip fastener 5 and the locking fastener 4 disengage. The trip fastener 5 or the locking fastener 4 drives the alarm indicator 14 to rotate, so that the alarm indicating surface 14-2 aligns with the indicating window 19, indicating the tripping status of the circuit breaker and providing a fault alarm. The trip fastener 5 or the locking fastener 4 can directly or indirectly drive the alarm indicator 14.

[0055] like Figure 10-13 As shown in Embodiment 2, the indicator device in this embodiment further includes a circuit breaker indicator 15 and a first elastic member based on Embodiment 1. The circuit breaker indicator 15 is rotatably installed in the housing. The first elastic member acts on the circuit breaker indicator 15. The circuit breaker indicator 15 is provided with a circuit breaker indicator surface 15-2. When the circuit breaker is closed or opened, the operating member 1 or the operating mechanism or the contact shaft 6 drives the circuit breaker indicator 15 so that the circuit breaker indicator surface 15-2 corresponds to the indicator window 19 to indicate the circuit breaker status.

[0056] Alternatively, when the circuit breaker is closed, the operating element 1, the operating mechanism, or the contact shaft 6 drives the closing / opening indicator 15 to rotate and compress the first elastic element, so that the closing indicator area of ​​the closing / opening indicator surface 15-2 corresponds to the indicator window 19 to indicate that the circuit breaker is closed. When the circuit breaker is opened, the operating element 1, the operating mechanism, or the contact shaft 6 avoids the closing / opening indicator 15, and the first elastic element drives the opening indicator area of ​​the closing / opening indicator 15 to correspond to the indicator window 19 to indicate that the circuit breaker is open. Or, when the circuit breaker is closed, the operating element 1, the operating mechanism, or the contact shaft 6 avoids the closing indicator 15, and the first elastic element drives the closing indicator area of ​​the closing / opening indicator 15 to correspond to the indicator window 19 to indicate that the circuit breaker is closed. When the circuit breaker is opened, the operating element 1, the operating mechanism, or the contact shaft 6 drives the closing indicator 15 to rotate and compress the first elastic element, so that the opening indicator area corresponds to the indicator window 19 to indicate that the circuit breaker is open. The operating element 1, operating mechanism, or contact shaft 6 can directly or indirectly drive the opening and closing indicator 15.

[0057] It should be noted that the indicator windows 19 corresponding to the opening / closing indicator 15 and the alarm indicator 14 can be the same window, two areas of one window, or two independent windows, all of which fall within the protection scope of this invention.

[0058] In a preferred embodiment, the rotation axes of the opening / closing indicator 15 and the alarm indicator 14 are concentrically arranged and installed on the same rotating shaft within the housing. The first elastic element and the second elastic element are the same elastic element, which in this embodiment is an indicator spring 22. The indicator spring 22 acts on both sides of the opening / closing indicator 15 and the alarm indicator 14 respectively, causing the opening / closing indicator 15 and the alarm indicator 14 to reset to the same side. Figure 10 (The middle direction is counterclockwise).

[0059] like Figure 10-13 As shown, preferably, the opening / closing indicator 15 has a first pivot part in the middle, one end of which is a first swing arm 15-1, and the other end is a first indicator arm. The end of the first indicator arm has an arc-shaped opening / closing indicator surface 15-2, on which there are closing indicator areas and opening indicator areas. The closing indicator areas and opening indicator areas are different colors, text, or symbols, used to indicate the closing state and the opening state, respectively. The alarm indicator 14 has a second pivot part in the middle, one end of which is a second swing arm 14-3, and the other end is a second indicator arm. The end of the second indicator arm has an arc-shaped alarm indicator surface 14-2, on which there are colors, text, or symbols, used to indicate the tripped opening state.

[0060] Preferably, the indicating spring 22 is installed between the first pivot and the second pivot. One of the first pivot and the second pivot has a spring mounting groove 15-3, and the other has a spring mounting boss. Both the spring mounting groove and the spring mounting boss have pivot holes for the rotating shaft to pass through. The indicating spring 22 is sleeved on the spring mounting boss, and the spring mounting boss is correspondingly mounted in the spring mounting groove. The elastic arm of the indicating spring 22 acts on the opening / closing indicator 15 and the alarm indicator 14, respectively.

[0061] Preferably, the closing indicator area and the opening indicator area of ​​the closing indicator surface 15-2 are arranged at different heights to form a stepped structure. The alarm indicator surface 14-2 can rotate to block the closing indicator area or the opening indicator area at the lower part of the stepped structure and is limited by the side wall of the stepped structure. When the circuit breaker trips, the alarm indicator surface 14-2 blocks the closing indicator area or the opening indicator area at the lower part of the stepped structure and corresponds to the indicator window 19.

[0062] In this embodiment, when the circuit breaker is opened or closed, the lever 3 of the operating mechanism acts on the open / close indicator 15. Preferably, the lever 3 is provided with a first protrusion 3-2. When the circuit breaker is closed, the first protrusion 3-2 of the lever 3 acts on the first swing arm 15-1, causing the open / close indicator 15 to rotate. The open / close indicator 15 rotates clockwise, and the open / close indicator surface 15-2 displays the closed status in the indicator window 19 (in this embodiment, the upper side represents the open indicator area, and the lower side represents the closed indicator area). When the circuit breaker is opened, the first protrusion 3-2 of the lever 3 disengages from the first swing arm 15-1, and the open / close indicator 15 is acted upon by the indicator spring 22, causing the open / close indicator surface 15-2 to reset and rotate back, and the open / close indicator surface 15-2 displays the open status in the indicator window 19.

[0063] When the circuit breaker trips due to a fault, the tripping fastener 5 and the locking fastener 4 disengage and separate. Either the tripping fastener 5 or the locking fastener 4 triggers the alarm indicator 14. The alarm indicator surface 14-2 of the alarm indicator 14 corresponds to the indicator window 19, indicating that the circuit breaker has tripped due to a fault. Preferably, the alarm indicator surface 14-2 blocks the opening / closing indicator surface 15-2, thus ensuring that only an alarm indication appears in the indicator window 19, alerting the circuit breaker that it has tripped due to a fault.

[0064] Preferably, the indicating device further includes a rocker arm 16 and a slider 17, as well as a first return spring 16-1 and a second return spring 17-1. The rocker arm 16 is rotatably disposed within the housing, the first return spring 16-1 acts on the rocker arm 16, the slider 17 is slidably disposed within the housing, and the second return spring 17-1 acts on the slider 17. Figure 6 , 8As shown, when the circuit breaker is closed, the operating element 1, the operating mechanism, or the moving contact assembly can drive the slider 17 to move, causing the slider 17 to drive the alarm indicating surface 14-2 of the alarm indicator 14 away from the indicating window 19, and the slider 17 is limited by the rocker arm 16, such as... Figure 7 , 9 As shown, when the circuit breaker trips, the tripping fastener 5 and the locking fastener 4 disengage, and either the tripping fastener 5 or the locking fastener 4 pushes the swing arm 16 to move, causing the swing arm 16 to release from its limit position on the slider 17. The second reset spring 17-1 drives the slider 17 to move and avoid the alarm indicator 14. The indicator spring 22 drives the alarm indicator surface 14-2 of the alarm indicator 14 to correspond with the indicator window 19. Figure 11 As shown, when the circuit breaker is normally tripped, the locking element 4 and the tripping element 5 maintain a latching engagement and rotate with the contact shaft 6, without touching the swing arm 16. The slider 17 remains in the limit position with the swing arm 16, and the slider 17 will not reset.

[0065] In this embodiment, when the circuit breaker is closed, the lever 3 of the operating mechanism drives the slider 17 to move, causing the slider 17 to drive the alarm indicator surface 14-2 of the alarm indicator 14 away from the indicator window 19, and the slider 17 is limited by the swing rod 16. The lever 3 is provided with a second protrusion 3-3 for driving the slider 17, which facilitates the setting of the slider 17 and the indicator mechanism, and the structural layout is reasonable. Of course, the slider 17 can also be driven directly or indirectly by the operating member 1, the moving contact assembly, or other components of the operating mechanism, such as the contact shaft 6, the moving contact 7, the first connecting member 3-1, or the second connecting member 1-1.

[0066] Preferably, the slider 17 is provided with a first limiting part 17-2 that cooperates with the swing arm 16, a first trigger part 17-3 for driving the alarm indicator 14, and a first driving part for cooperating with the second return spring 17-1. In a preferred embodiment, the slider 17 is T-shaped, including a horizontally arranged slider body and a vertically arranged trigger arm. The slider body is linearly slidably installed in the housing, with one end serving as the first driving part cooperating with the second return spring 17-1 and the other end serving as the first limiting part 17-2 cooperating with the swing arm 16. The trigger arm is connected to the middle of the slider body in a T-shape, extending between the alarm contact 18-2 and the second protrusion 3-3 of the lever 3. The alarm indicator 14 is installed on one side of the trigger arm along the sliding direction of the slider 17. One side of the trigger arm serves as the first trigger part 17-3 for driving the alarm indicator 14, and the other side of the trigger arm serves as the second driving part cooperating with the operating member 1, the operating mechanism, or the moving contact assembly. When the circuit breaker is closed, the second protrusion 3-3 of lever 3 drives slider 17 to move, causing slider 17 to drive the alarm indicator surface 14-2 of alarm indicator 14 away from indicator window 19, and slider 17 is limited by rocker arm 16. In this embodiment, the second return spring 17-1 is a compression spring, which is connected between the housing and the first drive part. Of course, it can also be a torsion spring, leaf spring or other elastic element. The operating element 1 is a button that slides with the housing. Slider 17 is slidably disposed between the operating surface and the contact shaft 6. The sliding direction of slider 17 is parallel to the sliding direction of operating element 1. Alarm indicator 14 is disposed between lever 3 and operating surface. Second return spring 17-1 is disposed between operating surface and first drive part.

[0067] Preferably, the rocker arm 16 is provided with a second limiting part 16-2 that cooperates with the slider 17, a second trigger part 16-3 that cooperates with the locking member 4 or the jumping member 5, and a first driving part that cooperates with the first return spring 16-1. In a preferred embodiment, the rocker arm 16 is provided with a first rocker arm and a second rocker arm protruding from it. The end of the first rocker arm serves as the second limiting part 16-2, and the second rocker arm is provided with a limiting structure that serves as the first driving part that cooperates with the first return spring 16-1. One side of the second rocker arm serves as the second trigger part 16-3. In this embodiment, the limiting mechanism is a limiting groove, but it can also be a limiting rib or other structure. The first return spring 16-1 is a torsion spring, which is fitted onto a shaft inside the housing. One elastic arm is limited by the housing, and the other elastic arm extends into the limiting groove that serves as the first driving part, driving the second trigger part 16-3 of the rocker arm 16 to rotate towards the locking member 4 or the jumping member 5, and driving the second limiting part 16-2 to rotate in the direction that cooperates with the slider 17. Of course, the first return spring 16-1 can also be a compression spring, a leaf spring, or other elastic element.

[0068] Preferably, the rocker arm 16 is coaxially mounted with the rotation axis of the contact shaft 6 and is positioned below the contact shaft 6. Preferably, both the connecting plate 23-3 and the rocker arm 16 are located at one end of the axial direction of the contact shaft 6, and the first rocker arm and the second rocker arm are located on opposite sides of the connecting plate 23-3 in the radial direction of the rotation axis of the contact shaft 6, resulting in a reasonable and compact layout.

[0069] Preferably, the slider 17 is slidably disposed between the operating surface and the contact shaft 6, and the sliding direction of the slider 17 is parallel to the sliding direction of the operating component 1. The alarm indicator 14 and the opening / closing indicator 15 are disposed between the lever 3 and the operating surface. The housing is provided with a sliding groove 17-4 that cooperates with the slider 17. A sliding opening 17-5 is provided on one side wall of the sliding groove 17-4. The second return spring 17-1 is installed in the sliding groove 17-4 between the operating end face and the slider body. The slider body slides in the sliding groove 17-4, and the trigger arm extends out from the sliding opening 17-5 and moves in the sliding opening 17-5, and is limited in its movement position by the sliding opening 17-5.

[0070] Preferably, the lever 3 is provided with a third connecting hole and a second connecting hole respectively connected to the first connecting member 3-1 and the second connecting member 1-1. The lever 3 is provided with a first protrusion 3-2 on one radially upward side of the drive opening and closing indicator 15, and a second protrusion 3-3 on the other radial side of the drive slider 17.

[0071] In the normal state of the circuit breaker, the slider 17 is locked by the rocker arm 16, and the first trigger part 17-3 of the slider 17 acts on the second rocker arm 14-3 of the alarm indicator 14, causing the alarm indicator surface 14-2 to move away from the indicator window 19. When the circuit breaker trips due to a fault, the tripping fastener 5 or the locking fastener 4 triggers the rocker arm 16 to swing and release its limiting engagement with the slider 17. The slider 17 slides, causing the first trigger part 17-3 to disengage from the second rocker arm 14-3. The alarm indicator 14 rotates under the action of the indicator spring 22, and the alarm indicator surface 14-2 blocks the opening and closing indicator surface 15-2, thus only displaying the alarm status in the indicator window 19. When the circuit breaker is closed again, the second protrusion 3-3 of the lever 3 pushes the slider 17 to slide, the rocker arm 16 rotates and locks the slider 17, and the first trigger part 17-3 of the slider 17 acts on the alarm indicator 14 again, causing the alarm indicator surface 14-2 to move away from the indicator window 19.

[0072] Preferably, during tripping, the locking element 4 drives the swing arm 16, thereby aligning the alarm indicator surface 14-2 of the alarm indicator 14 with the indicator window 19 to achieve alarm indication. (See also...) Figure 6 , 8 10. When the circuit breaker is closed, the latching element 4 and the tripping element 5 engage; if Figure 7 , 9As shown in Figure 12, when the circuit breaker trips, the locking element 4 is driven to release its latching engagement with the tripping element 5. The locking drive arm 4-1 of the locking element 4, facing the rocker arm 16, acts as the locking drive part 4-7, pushing the second trigger part 16-3, causing the rocker arm 16 to press down. Figure 9 Rotating counterclockwise releases the limiting engagement with slider 17. After the jump fastener 5 releases the latching engagement with locking fastener 4, the protruding end 5-1 of the jump fastener 5 pushes the locking side 4-3 of locking fastener 4, which has a locking hook, causing the locking drive arm 4-1 to accelerate and push the swing arm 16 to move, releasing the engagement between the swing arm 16 and slider 17. The second reset spring 17-1 releases energy, causing slider 17 to disengage from alarm indicator 14. Alarm indicator 14 rotates under the action of indicator spring 22, and alarm indicator surface 14-2 blocks the opening and closing indicator surface 15-2.

[0073] Preferred, such as Figure 14-16 As shown, the circuit breaker is equipped with an auxiliary contact device, which is linked with the operating mechanism to provide feedback on the circuit breaker's opening and closing signals, thereby monitoring the circuit breaker's opening and closing status. The auxiliary contact device includes an auxiliary contact 18-1. When the circuit breaker is closed or open, the operating mechanism drives the auxiliary contact 18-1 to switch states, providing feedback on the circuit breaker's opening and closing signals. The opening and closing status of the circuit breaker is monitored by acquiring the state of the auxiliary contact 18-1. Preferably, the auxiliary contact 18-1 transmits signals through signal port 21 or other signal ports to monitor the circuit breaker's opening and closing status.

[0074] In this embodiment, the auxiliary contact 18-1 of the auxiliary contact device is a micro switch. The auxiliary contact 18-1 cooperates with the lever 3 of the operating mechanism. The lever 3 has a first protrusion 3-2. When the circuit breaker is closed, the first protrusion 3-2 of the lever 3 rotates toward the auxiliary contact 18-1, triggering the micro switch, which switches the internal contacts of the micro switch. When the circuit breaker is opened, the first protrusion 3-2 of the lever 3 rotates away from the micro switch, releasing the micro switch and resetting its internal contacts to the initial switching state. Alternatively, in another embodiment, when the circuit breaker is closed, the lever 3 moves away from the micro switch, and when the circuit breaker is opened, it touches and drives the micro switch to switch states. Furthermore, in other embodiments, the auxiliary contact device can also be linked with the operating element 1 or the contact shaft 6, or with other components of the operating mechanism, so that the auxiliary contact 18-1 switches states when the circuit breaker is closed or opened by the operating element 1, the contact shaft 6, or other components of the operating mechanism. If a first support protrusion is provided on the radial side of the contact shaft 6, when the circuit breaker is closed, the first support protrusion of the contact shaft 6 rotates away from the auxiliary contact 18-1, and the auxiliary contact 18-1 resets to the cut-off state. When the circuit breaker is opened, the rotation of the first support protrusion triggers the switching state of the auxiliary contact 18-1.

[0075] Preferably, a circuit board 20 is provided inside the circuit breaker, and a micro switch serving as an auxiliary contact 18-1 is installed on the circuit board 20. The circuit board 20 is stacked with the operating mechanism and is located below the operating mechanism in the thickness direction of the circuit breaker. The circuit board 20 is provided with a signal port 21 for transmitting the monitoring signal of the weak current to the host computer.

[0076] The auxiliary contact 18-1 is positioned near the operating surface, and the signal port 21 is located on the incoming / outgoing line end face. The circuit board 20 extends from the operating surface to the incoming / outgoing line end face and is stacked below the operating mechanism and other mechanisms in the thickness direction of the circuit breaker. It can be separated and isolated by a partition. In this embodiment, the auxiliary contact 18-1 is a micro switch, but it can also be other structures such as an elastic contact set on the circuit board. Preferably, the circuit board 20 can also be provided with an auxiliary indicator light, which is connected to the signal circuit of the auxiliary contact 18-1. When the auxiliary contact 18-1 is closed, it outputs a closing signal, and the auxiliary indicator light illuminates to indicate the closing status of the circuit breaker. The auxiliary indicator light can correspond to the indicator window 19.

[0077] Preferably, the circuit breaker is equipped with an alarm contact device, which includes an alarm contact 18-2. When the circuit breaker trips, the trip fastener 5 and the locking fastener 4 disengage, and the trip fastener 5 or the locking fastener 4 drives the alarm contact 18-2 to switch states, providing a trip signal. The trip fastener 5 or the locking fastener 4 can directly or indirectly drive the alarm contact 18-2.

[0078] Preferably, the alarm contact device in this embodiment includes an alarm contact 18-2, a swing arm 16, a slider 17, a first return spring 16-1, and a second return spring 17-1. The swing arm 16 is rotatably disposed within the housing, the first return spring 16-1 acts on the swing arm 16, and the slider 17 is slidably disposed within the housing. The second return spring 17-1 acts on the slider 17. When the circuit breaker is closed, the operating member 1, the operating mechanism, or the moving contact assembly drives the slider 17 to move, causing the second return spring 17-1 to store energy and the alarm contact 18-2 to switch states, and limiting the slider 17 and the swing arm 16. When the circuit breaker is tripped, the trip fastener 5 and the locking fastener 4 disengage, and the locking fastener 4 or the trip fastener 5 pushes the swing arm 16 to move, causing the swing arm 16 to release its limitation on the slider 17. The second return spring 17-1 releases energy, driving the slider 17 to reset and switching the alarm contact 18-2 to switch states, providing feedback on the tripping status of the circuit breaker as an alarm indication.

[0079] In this embodiment, when the circuit breaker is closed, the operating mechanism drives the slider 17 to move and touch the alarm contact 18-2, causing the alarm contact 18-2 to switch to the closed state. When the circuit breaker trips and opens, the second reset spring 17-1 drives the slider 17 to reset and move away from the alarm contact 18-2, causing the alarm contact 18-2 to reset and switch to the open state. When the circuit breaker is normally opened, the locking element 4 and the tripping element 5 maintain a latching engagement and rotate with the contact shaft 6, without touching the swing arm 16. The slider 17 remains in the limit position with the swing arm 16, and the slider 17 will not reset.

[0080] In another embodiment, when the circuit breaker is closed, the operating mechanism drives the slider 17 to move away from the alarm contact 18-2, causing the alarm contact 18-2 to reset its switching state and be limited by the swing arm 16. When the circuit breaker trips and opens, the tripping or locking mechanism pushes the swing arm 16 to move, causing the swing arm 16 to release its limitation by the slider 17. The second reset spring 17-1 then drives the slider 17 to reset and touch the alarm contact 18-2 to switch states. Of course, the alarm contact 18-2 can also be a normally closed contact, which is touched and switched to an open state when the circuit breaker is closed, and resets to a closed state when the circuit breaker trips and opens, serving as feedback on the circuit breaker's tripping status. All of these fall within the protection scope of this invention.

[0081] Preferably, in this embodiment, when the circuit breaker is closed, the lever 3 of the operating mechanism drives the slider 17 to move, causing the second reset spring 17-1 to store energy and switch the state of the alarm contact 18-2, and limiting the slider 17 to the rocker arm 16. Alternatively, the slider 17 can be driven directly or indirectly by the operating component 1, the moving contact assembly, or other components of the operating mechanism, such as the contact shaft 6, the moving contact 7, the first connecting component 3-1, or the second connecting component 1-1. Preferably, a signal port 21 is provided on the housing, and a circuit board 20 is provided inside the housing. The micro switch for the alarm contact 18-2 is mounted on the circuit board 20 and connected to the signal port 21, transmitting the weak current monitoring signal to the host computer through the signal port 21. The alarm contact 18-2 described in this embodiment is a micro switch, but it can also be other structures such as an elastic contact on the circuit board. The circuit board 20 can also be equipped with an alarm indicator light, which is connected to the signal circuit of the alarm contact 18-2 to indicate whether the circuit breaker has tripped.

[0082] The slider 17 and swing arm 16 of the alarm contact device in this embodiment are similar in structure to those of the slider 17 and swing arm 16 of the indicator device. The slider 17 is provided with a first limiting part 17-2 that cooperates with the swing arm 16, a first trigger part 17-3 for driving the alarm contact 18-2, and a first driving part for cooperating with the second return spring 17-1. The slider 17 in this embodiment is T-shaped, including a horizontally arranged slider body and a vertically arranged trigger arm. The slider body is linearly slidably installed in the housing. One end serves as the first driving part that cooperates with the second return spring 17-1, and the other end serves as the first limiting part 17-2 that cooperates with the swing arm 16. The trigger arm is connected to the middle of the slider body in a T-shape. The micro switch that serves as the alarm contact 18-2 is installed on one side of the trigger arm along the sliding direction of the slider 17. One side of the trigger arm serves as the first trigger part 17-3 that drives the alarm contact 18-2, and the other side of the trigger arm serves as the second driving part that cooperates with the operating member 1, the operating mechanism, or the moving contact assembly. The operating component 1 is a button that slides with the housing. The slider 17 is slidably disposed between the operating surface and the contact shaft 6. The sliding direction of the slider 17 is parallel to the sliding direction of the operating component 1. The alarm contact 18-2 is disposed between the lever 3 and the operating surface. The second reset spring 17-1 is disposed between the operating surface and the first drive part.

[0083] Preferably, the lever 3 is provided with a third connecting hole and a second connecting hole respectively connected to the first connecting member 3-1 and the second connecting member 1-1. The lever 3 is provided with a first protrusion 3-2 that is linked with the auxiliary contact device on one radially upward side, and a second protrusion 3-3 that is linked with the alarm contact 18-2 on the other radially upward side. The alarm contact 18-2 is located on the side of the lever 3 close to the operating member 1, and the auxiliary contact 18-1 is located on the side of the lever 3 away from the operating member 1.

[0084] The rocker arm 16 is rotatably mounted inside the housing. The rocker arm 16 is provided with a second limiting part 16-2 that cooperates with the slider 17, a second trigger part 16-3 that cooperates with the locking fastener 4 or the jumping fastener 5, and a first driving part that cooperates with the first return spring 16-1. In this embodiment, the rocker arm 16 is provided with a first rocker arm and a second rocker arm that protrude radially. The end of the first rocker arm serves as the second limiting part 16-2. The second rocker arm is provided with a limiting structure that serves as the first driving part that cooperates with the first return spring 16-1. In this embodiment, the limiting mechanism is a limiting groove, but it can also be a limiting rib or other structures. One side of the second rocker arm serves as the second trigger part 16-3. Preferably, the rocker arm 16 is coaxially mounted with the rotation axis of the contact shaft 6 and is located below the contact shaft 6. Preferably, the connecting plate 23-3 and the rocker arm 16 are both located at one end of the axial direction of the contact shaft 6. The first rocker arm and the second rocker arm are opposite to the connecting plate 23-3 and are located on both sides of the radial direction of the rotation axis of the contact shaft 6, which is a reasonable and compact layout.

[0085] like Figure 14 , 16 As shown, when the circuit breaker is closed, the second protrusion 3-3 of lever 3 pushes the slider 17 to move, causing the first limiting part 17-2 of the slider to engage with the second limiting part 16-2 of the rocker arm, thus limiting each other. At this time, the second return spring 17-1 stores energy, and the first trigger part 17-3 of slider 17 touches the alarm contact 18-2. See [reference needed] Figure 5 At this time, the locking fastener 4 and the jumping fastener 5 are engaged; such as Figure 15 As shown (reference) Figure 8-9 When the circuit breaker trips, the locking element 4 is driven to release its latching engagement with the tripping element 5. The locking drive arm 4-1 of the locking element 4, facing the rocker arm 16, acts as the locking drive part 4-7, pushing the second trigger part 16-3, causing the rocker arm 16 to press down. Figure 6 Rotating counterclockwise releases the limiting engagement with slider 17. After the jump fastener 5 releases the latch engagement with locking fastener 4, the protruding end 5-1 of locking fastener 4 pushes the locking side 4-3 of locking fastener 4 with locking hook, causing locking fastener drive arm 4-1 to accelerate and push swing arm 16 to move, releasing the engagement between swing arm 16 and slider 17. The second reset spring 17-1 releases energy, causing slider 17 to disengage from alarm contact 18-2, and alarm contact 18-2 switches states.

[0086] Obviously, the auxiliary contact device, alarm contact device, and indicating device of this embodiment can all be provided as needed, or only one or two can be provided. Moreover, the auxiliary contact device, alarm contact device, and indicating device of this embodiment are not only applicable to double-break contact structures, but also applicable to single-break contact structures with only one stationary contact.

[0087] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0088] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker, comprising a housing and an operating mechanism and an indicating device disposed within the housing, the operating mechanism comprising a latching fastener (5) and a locking fastener (4), characterized in that: The indicating device includes an alarm indicator (14) and a second elastic element. The alarm indicator (14) is rotatably installed inside the housing. The second elastic element acts on the alarm indicator (14). The alarm indicator (14) has an alarm indicating surface (14-2). When the circuit breaker trips, the trip fastener (5) and the locking fastener (4) release their latching engagement. The trip fastener (5) or the locking fastener (4) drives the alarm indicator (14) to rotate, so that the alarm indicating surface (14-2) corresponds to the indicating window (19). The indicating device also includes a swing rod (16) and a slider (17), as well as a first return spring (16-1) and a second return spring (17-1). The swing rod (16) is rotatably installed inside the housing. The first return spring (16-1) acts on the swing rod (16), and the slider... (17) is slidably disposed in the housing, and the second reset spring (17-1) acts on the slider (17); when the circuit breaker is closed, the operating member (1) or the operating mechanism or the moving contact assembly can drive the slider (17) to move, so that the slider (17) drives the alarm indicator (14) away from the indicator window (19), and the slider (17) is limited to the swing rod (16). When the circuit breaker trips and opens, the trip fastener (5) and the locking fastener (4) release the latching engagement, and the trip fastener (5) or the locking fastener (4) pushes the swing rod (16) to move, so that the swing rod (16) releases the limitation of the slider (17), and the second reset spring (17-1) drives the slider (17) to move to avoid the alarm indicator (14), and the second elastic member drives the alarm indicator (14) to correspond with the indicator window (19).

2. The circuit breaker according to claim 1, characterized in that: An operating component (1) for driving the circuit breaker to open and close is provided on one end face of the housing. A moving contact assembly is provided inside the housing. The operating mechanism includes a lever (3), a trip fastener (5), and a locking fastener (4). The moving contact assembly includes a moving contact (7) and a contact shaft (6). The contact shaft (6) is rotatably installed inside the housing. The moving contact (7) is set on the contact shaft (6). The trip fastener (5) and the locking fastener (4) are rotatably installed on the contact shaft (6) and are fastened together. The lever (3) is rotatably installed inside the housing. The trip fastener (5) is connected to the lever (3) through a first connecting member (3-1). The lever (3) is connected to the operating component (1) through a second connecting member (1-1).

3. The circuit breaker according to claim 2, characterized in that: The indicating device further includes a circuit breaker closing indicator (15) and a first elastic element. The circuit breaker closing indicator (15) is rotatably installed in the housing. The first elastic element acts on the circuit breaker closing indicator (15). The circuit breaker closing indicator (15) is provided with a circuit breaker closing indicator surface (15-2). When the circuit breaker is closed or opened, the operating element (1) or operating mechanism or contact shaft (6) drives the circuit breaker closing indicator (15) so that the circuit breaker closing indicator surface (15-2) corresponds to the indicating window (19) to indicate the circuit breaker closing status.

4. The circuit breaker according to claim 3, characterized in that: When the circuit breaker is closed or opened, the lever (3) rotates to drive the closing / opening indicator (15), so that the closing indicator area or opening indicator area on the closing / opening indicator surface (15-2) corresponds to the indicator window (19). When the circuit breaker is opened or closed, the lever (3) rotates to separate from the closing / opening indicator (15), and the first elastic element drives the closing / opening indicator (15) to reset, so that the opening indicator area or closing indicator area on the closing indicator surface (15-2) corresponds to the indicator window (19).

5. The circuit breaker according to claim 3, characterized in that: The rotation axes of the opening / closing indicator (15) and the alarm indicator (14) are concentric.

6. The circuit breaker according to claim 5, characterized in that: The first elastic element and the second elastic element are the same elastic element.

7. The circuit breaker according to claim 6, characterized in that: The opening and closing indicator (15) has a first pivot part in the middle, one end of which is a first swing arm (15-1) and the other end is a first indicator arm. The end of the first indicator arm is provided with an arc-shaped opening and closing indicator surface (15-2). The alarm indicator (14) has a second pivot part in the middle, one end of which is a second swing arm (14-3) and the other end is a second indicator arm. The end of the second indicator arm is provided with an arc-shaped alarm indicator surface (14-2). The same elastic element as the first elastic element and the second elastic element is an indicator spring (22), which is installed between the first pivot part and the second pivot part.

8. The circuit breaker according to claim 7, characterized in that: One of the first pivot part and the second pivot part is provided with a spring mounting groove (15-3), and the other is provided with a spring mounting boss. Both the spring mounting groove and the spring mounting boss are provided with pivot holes for the rotating shaft to pass through. The indicator spring (22) is sleeved on the spring mounting boss, and the spring mounting boss is correspondingly mounted in the spring mounting groove. The elastic arm of the indicator spring (22) acts on the opening and closing indicator (15) and the alarm indicator (14) respectively.

9. The circuit breaker according to claim 7, characterized in that: The closing and opening indicator surface (15-2) is provided with a closing indicator area and a closing indicator area. The closing indicator area and the opening indicator area are set at different heights to form a stepped structure. The alarm indicator surface (14-2) can rotate to block the closing indicator area or the opening indicator area at the lower part of the stepped structure and is limited by the side wall of the stepped structure.

10. The circuit breaker according to claim 1, characterized in that: The slider (17) includes a slider body and a trigger arm arranged in a T-shape. The slider body is linearly slidably installed in the housing. One end serves as a first driving part that cooperates with the second reset spring (17-1), and the other end serves as a first limiting part (17-2) that cooperates with the swing arm (16). The trigger arm is connected to the middle of the slider body. The alarm contact (18-2) is installed on one side of the trigger arm along the sliding direction of the slider (17). One side of the trigger arm serves as a first trigger part (17-3) that drives the alarm indicator (14), and the other side of the trigger arm serves as a second driving part.

11. The circuit breaker according to claim 1, characterized in that: The rocker arm (16) is provided with a second limiting part (16-2) that cooperates with the slider (17), a second trigger part (16-3) that cooperates with the locking fastener (4) or the jumping fastener (5), and a first driving part that cooperates with the first return spring (16-1). The rocker arm (16) is provided with a first rocker arm and a second rocker arm respectively. The end of the first rocker arm serves as the second limiting part (16-2), the second rocker arm is provided with a limiting structure as the first driving part that cooperates with the first return spring (16-1), and one side of the second rocker arm serves as the second trigger part (16-3).

12. The circuit breaker according to claim 1, characterized in that: The jump fastener (5) has a protruding jump hook (5-2) that engages with the locking fastener (4). The locking fastener (4) has a notch on the side near the jump fastener (5) to form a locking platform (4-5). The locking elastic element (4-2) drives the locking fastener (4) to rotate towards the jump fastener (5) so that the locking platform (4-5) engages with the jump hook (5-2). After the jump fastener (5) releases its engagement with the locking fastener (4), the jump fastener (5) pushes the locking fastener (4) to accelerate the movement of the swing rod (16).

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