Circuit breaker

Abstract

The circuit breaker comprises a shell, a handle mechanism, an operating mechanism, a short-circuit protection mechanism, a delay protection mechanism, a short-circuit indication mechanism and a delay indication mechanism, the short-circuit indication mechanism comprises a short-circuit indication piece and a first elastic piece, and the short-circuit protection mechanism limits the short-circuit indication piece and enables the first elastic piece to store energy in a normal working state; when the short-circuit protection mechanism acts, the short-circuit indication piece is unlimited, and the first elastic piece releases energy to drive the short-circuit indication piece to be matched with the short-circuit indication hole for indication; the delay indicating mechanism comprises a delay indicating piece, a locking piece and a third elastic piece, when the delay protection mechanism is in a normal working state, the locking piece is matched with the delay indicating piece in a limiting mode and enables the third elastic piece to store energy, and when the delay protection mechanism acts, the locking piece is triggered to be separated from the delay indicating piece; and the third elastic piece releases energy to drive the delay indicating piece to be matched with the delay indicating hole for indication. The short-circuit indicating mechanism and the delay indicating mechanism are configured to indicate fault types respectively, and the device has the advantages of being simple in structure and high in reliability.

Description

Technical Field

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

[0002] A circuit breaker is a switch device used to cut off and connect a load circuit, and to cut off a fault circuit to prevent the accident from expanding, thereby ensuring the safe operation of the load circuit. When there is a short circuit or overload fault in the line, the circuit breaker can cut off the circuit to protect the circuit. However, in existing circuit breakers, usually only an on / off indication is provided, and when a fault occurs, the fault type cannot be identified, which is not conducive to rapid identification and resolution of the fault, resulting in inconvenience in use. Summary of the invention

[0003] The object of the present invention is to overcome at least one defect of the prior art and provide a circuit breaker with a simple structure and capable of identifying fault types.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a circuit breaker, comprising a housing, the housing being rotatably provided with a handle mechanism, the housing being provided with an operating mechanism, a short-circuit protection mechanism and a time-delay protection mechanism, the handle mechanism being linked and connected with the operating mechanism, the short-circuit protection mechanism and the time-delay protection mechanism being respectively used to trigger the operating mechanism to trip, and the circuit breaker is characterized in that: a short-circuit indication mechanism and a time-delay indication mechanism are further provided, the housing being provided with a short-circuit indication hole and a time-delay indication hole,

[0006] The short-circuit indication mechanism comprises a short-circuit indication member and a first elastic member. The short-circuit protection mechanism limits the short-circuit indication member in a normal working state and allows the first elastic member to store energy. When the short-circuit protection mechanism is actuated, the short-circuit indication member is released from the limit, and the first elastic member releases energy to drive the short-circuit indication member to cooperate with the short-circuit indication hole to indicate;

[0007] The delay indication mechanism includes a delay indication member, a locking member and a third elastic member. When the delay protection mechanism is in normal working state, the locking member and the delay indication member are limitedly matched and the third elastic member stores energy. When the delay protection mechanism is actuated, the locking member is triggered to separate from the delay indication member, and the third elastic member releases energy to drive the delay indication member to cooperate with the delay indication hole for indication.

[0008] Preferably, the short-circuit protection mechanism includes a moving component that moves between a first position and a second position, the short-circuit indicator includes a short-circuit indicator end and a limit end, the moving component is limitedly matched with the limit end at the first position, and after the moving component moves to the second position and separates from the limit end, the first elastic member drives the short-circuit indicator end to pop out of the short-circuit indicator hole;

[0009] The delay protection mechanism includes a bimetallic strip, and the delay indicator includes a delay indicator end and a locking end. After the bimetallic strip is bent by heat, the locking end is triggered to separate from the locking element, and the third elastic element drives the delay indicator end to pop out of the delay indicator hole.

[0010] Preferably, the short-circuit indicator also includes a reset end, which extends to one side of the handle mechanism. After the short-circuit indicator end pops out of the short-circuit indicator hole,

[0011] Press the short-circuit indicating end or rotate the handle mechanism to drive the reset end, so that the limiting end of the short-circuit indicating member is limitedly matched with the moving component located at the first position.

[0012] Preferably, a second elastic member is further provided between the reset end and the handle mechanism, one end of the second elastic member is connected to the short-circuit indicator, and the other end of the second elastic member is elastically matched with the handle mechanism.

[0013] Preferably, the handle mechanism comprises a handle body, the handle body is provided with a receiving groove, and a handle spring and an energy storage rocker arm are coaxially rotatably mounted in the receiving groove.

[0014] When the moving assembly is limitedly matched with the short-circuit indicator, the energy storage part of the energy storage rocker arm is matched with the second elastic member, and the handle body is separated from the second elastic member during the opening and closing rotation process;

[0015] When the moving assembly is separated from the short-circuit indicator, the handle body turned to the opening position abuts against the second elastic member, and the energy storage rocker arm is separated from the second elastic member.

[0016] Preferably, the limiting end is provided with a limiting groove, and when the moving component is in the first position, one end of the moving component away from the operating mechanism is limitedly matched with the limiting groove.

[0017] Preferably, the short-circuit protection mechanism includes a coil assembly and a moving assembly driven by the coil assembly, the coil assembly includes a coil frame and a coil wound around the outside of the coil frame, the moving assembly is arranged in the middle of the coil frame, the moving assembly includes a moving iron core, a static iron core and a reset spring, the static iron core is fixed to one end of the coil frame, the moving iron core is slidably arranged at the other end of the coil frame, a reset spring is connected between the moving iron core and the static iron core, one end of the moving iron core is connected to a push rod passing through the static iron core, and the other end of the moving iron core is limitedly matched with the short-circuit indicator.

[0018] Preferably, one end of the locking piece is limitedly assembled with the housing, and the other end of the locking piece is provided with a locking part and an unlocking part, and the locking end is provided with a matching part, and the matching part is limitedly engaged with the locking part, and the movable end of the bimetallic strip pushes the unlocking part to separate the matching part from the locking part.

[0019] Preferably, the locking member comprises at least one guide surface, and at least one guide surface is connected to one side of the locking portion.

[0020] After the delay indicating end pops out of the delay indicating hole, the delay indicating end is pressed to drive the matching portion to slide along the guide surface until it is limitedly matched with the locking portion.

[0021] Preferably, the opposite ends of the shell serve as wiring terminals respectively, and one side of the shell connected between the two wiring terminals protrudes outward to form an operating terminal, the short circuit indication hole is located at the side of the operating end close to one wiring terminal, and the delay indication hole is located at the side of the other wiring terminal close to the operating end.

[0022] Preferably, a first mounting portion and a second mounting portion are provided in the housing, the first elastic member is provided between the first mounting portion and the short-circuit indicator, and the third elastic member is provided between the second mounting portion and the delay indicator.

[0023] Preferably, the first mounting portion is spaced opposite to the short-circuit indication hole, and the first elastic member undergoes elastic deformation in a direction parallel to the central axis of the short-circuit indication hole; and / or the second mounting portion is spaced opposite to the delay indication hole, and the third elastic member undergoes elastic deformation in a direction parallel to the central axis of the delay indication hole.

[0024] Preferably, the short-circuit indicator is also provided with at least one first stop portion, which cooperates with the shell to limit the moving stroke of the short-circuit indicator, and the delay indicator is also provided with at least one second stop portion, which cooperates with the shell to limit the moving stroke of the delay indicator.

[0025] Preferably, the short circuit indicator includes a first straight plate, one end of the first straight plate serves as a short circuit indicating end, the other end of the first straight plate is connected to a second straight plate, the second straight plate is parallel to the plane where the first straight plate is located, and one end of the second straight plate away from the first straight plate serves as a limiting end; at least one first stop portion is protruding on the side of the first straight plate facing away from the third straight plate, the first stop portion is a strip-shaped convex rib, and the length of the first stop portion is less than the length of the first straight plate.

[0026] Preferably, a through hole serving as a limit groove is provided in the middle of the plate surface of the second straight plate, and the other end of the first straight plate is also connected to the third straight plate, the third straight plate serving as a reset end perpendicular to the plane where the first straight plate is located, one side edge of the third straight plate serves as a first abutment portion, and a slot is provided on the other side edge of the third straight plate, one end of the slot is provided along a direction parallel to the plate surface of the third straight plate, and the other end of the slot is provided along the connection between the first straight plate and the third straight plate, so that the slot is an L-shaped slot as a whole.

[0027] Preferably, a first mounting portion is provided in the housing, the first mounting portion is spaced apart from and opposite to the first abutting portion, and the first elastic member is assembled between the first mounting portion and the first abutting portion;

[0028] The second elastic member is a V-shaped spring sheet bent in the middle, and the first end of the second elastic member is obliquely arranged between the reset end and the handle mechanism, and the first end of the second elastic member is used to cooperate with the handle body or the energy storage rocker arm of the handle mechanism; the second end of the second elastic member is inserted into the slot in a direction parallel to the surface of the third straight plate, and the second end of the second elastic member is folded back to form a hook shape and extends to the surface of the third straight plate at the connection point between the first straight plate and the third straight plate.

[0029] Preferably, the delay indicator includes a fourth straight plate, one end of the fourth straight plate serves as a delay indicating end corresponding to the delay indicating hole, the other end of the fourth straight plate is connected to the fifth straight plate, the plane where the fifth straight plate is located is perpendicular to the plane where the fourth straight plate is located, the end of the fifth straight plate away from the fourth straight plate is connected to the sixth straight plate, the plane where the sixth straight plate is located is perpendicular to the plane where the fifth straight plate is located, the end of the sixth straight plate away from the fifth straight plate serves as a locking end, a matching portion is provided on one side surface of the locking end, the matching portion is a boss structure protruding from the locking end, and the locking end and the delay indicating end are respectively located on both sides of the plate surface of the fifth straight plate, the side of the fifth straight plate facing the delay indicating hole serves as a second stopper, and the side of the fifth straight plate facing away from the delay indicating hole serves as a second abutment portion.

[0030] Preferably, a second mounting portion is provided in the housing, and the third elastic member is provided between the second mounting portion and the second abutting portion;

[0031] The locking piece is in the form of a rod body as a whole, one end of the locking piece is limitedly assembled in the shell, and the other end of the locking piece is provided with a locking portion and an unlocking portion, the locking portion is a groove structure opened on one side of the rod body, the locking portion is located close to the other end of the locking piece, and the side wall of the locking piece extends outward to form an unlocking portion, and the unlocking portion is rod-shaped and adjacent to the locking portion.

[0032] The circuit breaker of the present invention indicates the fault type respectively by configuring a short-circuit indicating mechanism and a time delay indicating mechanism. At the same time, the short-circuit indicating member is limited and driven by the short-circuit protection mechanism and the first elastic member, and the time delay indicating member is limited and driven by the time delay protection mechanism, the locking member and the third elastic member. The circuit breaker has the advantages of simple structure and high reliability.

[0033] In particular, the short-circuit indicator is limited by the limiting groove and the moving component of the short-circuit protection mechanism, which has the advantages of simple processing, low cost and high reliability.

[0034] In particular, one end of the locking piece is limitedly assembled, and the other end is provided with a locking part and an unlocking part. The bimetallic strip pushes the unlocking part to move a small distance to unlock the piece, and small space is occupied in the housing.

[0035] In addition, the short-circuit indicator can be reset by pressing the short-circuit indicator or rotating the handle mechanism, which has the advantages of convenient operation and high reliability.

[0036] In addition, the short-circuit indicator hole and the delay indicator hole are both located at or close to the side of the operating end to prevent the short-circuit indicator and the delay indicator from interfering with the normal operation of the handle mechanism and the operating mechanism during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the circuit breaker of the present invention;

[0038] Figure 2 It is a schematic diagram of the internal structure of the circuit breaker of the present invention;

[0039] Figure 3 It is a structural schematic diagram of the housing in the present invention;

[0040] Figure 4 It is a schematic diagram of the internal structure of the housing in the present invention;

[0041] Figure 5 It is a schematic diagram of the coordination of the short-circuit protection mechanism and the short-circuit indication mechanism in the present invention;

[0042] Figure 6 It is a schematic diagram of the short-circuit protection mechanism and the disassembled short-circuit indicating mechanism in the present invention;

[0043] Figure 7 It is a schematic diagram of the short-circuit indicator and the short-circuit protection mechanism in the present invention when they are in limited position cooperation;

[0044] Figure 8 It is a schematic diagram of the energy storage rocker arm and the second elastic member in the present invention when they cooperate;

[0045] Fig. 9 It is a schematic diagram of the limited cooperation between the moving iron core and the short-circuit indicator in the present invention;

[0046] Fig.10 It is a schematic diagram of the short-circuit indicator and the short-circuit protection mechanism in the present invention when the limit cooperation is released;

[0047] Fig.11 It is a schematic diagram of the movable iron core and the circuit breaker indicator in the present invention when the limit fit is released;

[0048] Fig.12 It is a schematic diagram of the movable iron core and the short-circuit indicator in the present invention when the limit fit is released;

[0049] Fig.13 The structure of the short circuit indicator in the present invention is shown in FIG. Figure 1 ;

[0050] Fig.14 The structure of the short circuit indicator in the present invention is shown in FIG. Figure 2 ;

[0051] Fig.15 It is a schematic diagram of the coordination of the time delay protection mechanism and the time delay indication mechanism in the present invention;

[0052] Fig.16 It is a schematic diagram of the time delay protection mechanism and the decomposed time delay indication mechanism in the present invention;

[0053] Fig.17 It is a structural schematic diagram of the delay indicator in the present invention;

[0054] Fig.18 It is a schematic structural diagram of the locking member in the present invention;

[0055] Reference numerals:

[0056] 1-housing, 10-operating end, 11-short circuit indication hole, 12-delay indication hole, 13-first mounting part, 14-second mounting part, 2-handle mechanism, 21-handle body, 22-energy storage rocker arm, 3-operating mechanism, 4-short circuit protection mechanism, 41-coil, 42-coil skeleton, 43-moving iron core, 44-push rod, 5-delay protection mechanism, 51-bimetallic strip, 52-connecting plate, 6-short circuit indication mechanism, 61-short circuit indicator, 611-short circuit Indication end, 612-limiting end, 613-limiting groove, 614-reset end, 615-first stop portion, 616-first abutting portion, 62-first elastic member, 63-second elastic member, 7-delay indication mechanism, 71-delay indication member, 711-delay indication end, 712-locking end, 713-matching portion, 714-second stop portion, 715-second abutting portion, 72-locking member, 721-locking portion, 722-unlocking portion, 73-third elastic member. DETAILED DESCRIPTION

[0057] The specific implementation of the circuit breaker of the present invention is further described below in conjunction with the embodiments given in the accompanying drawings. The circuit breaker of the present invention is not limited to the description of the following embodiments.

[0058] The circuit breaker includes a shell 1, which is rotatably equipped with a handle mechanism 2. The handle portion of the handle mechanism 2 extends out of the shell 1 from a handle hole of the shell 1. An operating mechanism 3 and a contact mechanism are arranged in the shell 1. The contact mechanism includes a moving contact and a static contact that cooperate with each other. The handle mechanism 2, the operating mechanism 3 and the moving contact are linked and connected in sequence. The operating handle can manually drive the operating mechanism 3 to drive the moving contact to approach or move away from the static contact, thereby realizing normal opening and closing.

[0059] A protection mechanism cooperating with the operating mechanism 3 is also arranged in the housing 1, and the protection mechanism includes a short-circuit protection mechanism 4 and a delayed protection mechanism 5. The short-circuit protection mechanism 4 and the delayed protection mechanism 5 are respectively arranged on both sides of the operating mechanism 3. The short-circuit protection mechanism 4 includes a coil assembly and a moving assembly driven by the coil assembly. When a short-circuit fault occurs, the short-circuit protection mechanism 4 triggers the operating mechanism 3 to trip, that is, under the drive of the coil assembly, the moving assembly moves from the first position to the second position to trigger the operating mechanism 3 to trip. The delayed protection mechanism 5 includes a bimetallic strip 51 and a connecting plate 52. When an overload fault occurs, the overload protection mechanism triggers the operating mechanism 3 to trip, that is, the bimetallic strip 51 is bent to trigger the operating mechanism 3 to trip, and the handle mechanism 2 is driven to the opening position when the operating mechanism 3 is tripped.

[0060] The improvement of the present application is that it also includes a short-circuit indication mechanism 6 and a delay indication mechanism 7. The housing 1 is provided with a short-circuit indication hole 11 and a delay indication hole 12. The short-circuit indication mechanism 6 includes a short-circuit indication piece 61 and a first elastic piece 62. The short-circuit protection mechanism 4 limits the short-circuit indication piece 61 and allows the first elastic piece 62 to store energy when in normal working state. When the short-circuit protection mechanism 4 is actuated, the limit is released from the short-circuit indication piece 61, and the first elastic piece 62 releases energy to drive the short-circuit indication piece 61 to cooperate with the short-circuit indication hole 11 for indication; the delay indication mechanism 7 includes a delay indication piece 71, a locking piece 72 and a third elastic piece 73. When the delay protection mechanism 5 is in normal working state, the locking piece 72 limits the delay indication piece 71 and allows the third elastic piece 73 to store energy. When the delay protection mechanism 5 is actuated, the locking piece 72 is triggered to separate from the delay indication piece 71, and the third elastic piece 73 releases energy to drive the delay indication piece 71 to cooperate with the delay indication hole 12 for indication.

[0061] In this way, the short-circuit indicating mechanism 6 and the delay indicating mechanism 7 are configured to respectively indicate the fault type. At the same time, the short-circuit indicating member 61 is limited and driven by the short-circuit protection mechanism 4 and the first elastic member 62, and the delay indicating member 71 is limited and driven by the delay protection mechanism 5, the locking member 72 and the third elastic member 73. It has the advantages of simple structure and high reliability.

[0062] Specifically, the short-circuit protection mechanism 4 includes a coil assembly and a moving assembly, and the coil assembly drives the moving assembly to move between the first position and the second position. When the short-circuit protection mechanism 4 is in a normal working state, the moving assembly is located at the first position and is limitedly matched with the limiting end 612 of the short-circuit indicator 61. When the short-circuit protection mechanism 4 is actuated, the coil assembly drives the moving assembly to move to the second position and separates from the limiting end 612, and the first elastic member 62 drives the short-circuit indicator 61, so that the short-circuit indicating end 611 of the short-circuit indicator 61 pops out of the short-circuit indicating hole 11 to indicate that there is a short-circuit indicator 61. In the case of a short circuit fault; the delay protection mechanism 5 includes a bimetallic strip 51. When the delay protection mechanism 5 is in normal working condition, the bimetallic strip 51 does not move. At this time, the locking end 712 of the indicator 71 is locked with the locking member 72. When the delay protection mechanism 5 is activated, that is, the bimetallic strip 51 is bent by heat, and the locking end 712 of the delay indicator 71 is triggered by the bimetallic strip 51 to separate from the locking member 72, the delay indicator 71 is driven by the third elastic member 73, so that the delay indicating end 711 of the delay indicator 71 pops out of the delay indicating hole 12 to indicate the existence of an overload fault.

[0063] It also includes a short-circuit indicating mechanism 6 and a delay indicating mechanism 7. The housing 1 is provided with a short-circuit indicating hole 11 and a delay indicating hole 12. The short-circuit protection mechanism 4 includes a short-circuit indicating member 61 and a first elastic member 62. The moving component of the short-circuit protection mechanism 4 is limitedly matched with the limiting end 612 of the short-circuit indicating member 61 at the first position. After the moving component moves to the second position and separates from the limiting end 612, the short-circuit indicating member 61 is driven by the first elastic member 62, so that the short-circuit indicating end 611 of the short-circuit indicating member 61 pops out of the short-circuit indicating hole 11; the delay indicating mechanism 7 includes a delay indicating member 71, a locking member 72 and a third elastic member 73. The locking end 712 of the delay indicating member 71 is limitedly matched with the locking member 72. After the bimetallic strip 51 of the delay protection mechanism 5 triggers the locking end 712 of the delay indicating member 71 to separate from the locking member 72, the third elastic member 73 drives the delay indicating member 71, so that the delay indicating end 711 of the delay indicating member 71 pops out of the delay indicating hole 12.

[0064] Preferably, the short-circuit indicator 61 is also provided with a reset end 614, which extends to one side of the handle mechanism 2. After the short-circuit indicator end 611 of the short-circuit indicator 61 pops out of the short-circuit indicator hole 11, the short-circuit indicator end 611 of the short-circuit indicator 61 is pressed or the handle mechanism 2 is rotated to drive the reset end 614, so that after the short-circuit indicator 61 overcomes the elastic force of the first elastic member 62, the moving component located at the first position is limitedly matched with the limit end 612 of the short-circuit indicator 61, and the short-circuit indicator 61 can be reset by pressing the short-circuit indicator 61 or rotating the handle mechanism 2, which has the advantages of convenient operation and high reliability. The handle mechanism 2 and the reset end 614 of the short-circuit indicator 61 can be driven directly or indirectly.

[0065] Furthermore, the opposite ends of the shell 1 serve as wiring terminals respectively, and one side of the shell 1 connected between the two wiring terminals protrudes outward to form an operating end 10, the handle mechanism 2 and the operating mechanism 3 are arranged side by side and are respectively rotatably arranged on the operating end 10, the short-circuit indication mechanism 6 and the delay indication mechanism 7 are respectively arranged on both sides of the handle mechanism 2, wherein the short-circuit indication hole 11 is opened at the side position of the operating end 10 close to one wiring terminal, and the delay indication hole 12 is opened at the side position of the other wiring terminal close to the operating end 10, the short-circuit indication hole 11 and the delay indication hole 12 are respectively selected to be opened at the side position of the operating end 10 or close to the side position of the operating end 10, so as to avoid the short-circuit indication component 61 and the delay indication component 71 interfering with the normal operation of the handle mechanism 2 and the operating mechanism 3 during the operation process.

[0066] Combination Figure 1-18 A specific embodiment of a circuit breaker is provided.

[0067] like Figure 1-4 As shown, the circuit breaker includes a shell 1, and the opposite ends of the shell 1 are respectively used as wiring terminals, each wiring terminal is respectively provided with a wiring port and an operating port, and at least one wiring terminal is arranged inside each wiring terminal, and each wiring terminal corresponds to a wiring port and an operating port respectively, the operating port is used to operate the wiring screw of the wiring terminal, and the wiring port is used to connect with an external wire; one side of the shell 1 connected between the two wiring terminals protrudes outward to form an operating terminal 10, so that the shell 1 is in a convex shape as a whole, and a handle mechanism 2 is rotatably assembled inside the operating terminal 10, and the handle mechanism 2 includes a handle body 21, and a handle spring and an energy storage rocker arm 22 are arranged in a receiving groove of the handle body 21, and the handle body 21, the energy storage rocker arm 22 and the handle spring are coaxially rotatably arranged inside the operating end 10, and the handle part of the handle body 21 extends out from the handle hole opened in the operating end 10 accordingly. Shell 1; an operating mechanism 3, a contact mechanism and an arc extinguishing system are also arranged in the shell 1, wherein the operating mechanism 3 and the handle mechanism 2 are arranged side by side inside the operating end 10, the operating mechanism 3 includes a lever, a jumper and a lock, the lever is rotatably assembled in the shell 1, the jumper and the lock are respectively rotatably assembled on the lever, and one end of the jumper and the lock are snap-fitted, the handle body 21 is connected to one end of the connecting rod, the other end of the connecting rod is connected to the lever and the jumper, and the other end of the lock is connected to a trip rod, the contact mechanism includes a moving contact and a static contact that cooperate with each other, the moving contact is coaxially assembled with the lever through a contact support, an energy storage spring is arranged between the lever and the contact support, the energy storage part of the energy storage rocker arm 22 cooperates with the contact support to store energy, the static contact is fixed to the middle of the shell 1, and the arc extinguishing system is arranged on one side of the contact mechanism to extinguish the arc generated by the contact mechanism disconnection.

[0068] A short-circuit protection mechanism 4 and a time-delay protection mechanism 5 are also provided in the housing 1. The short-circuit protection mechanism 4 is provided between the handle mechanism 2 and the arc extinguishing system. The short-circuit protection mechanism 4 includes a coil assembly and a moving assembly. One end of the moving assembly is opposite to the operating mechanism 3. When no short-circuit fault occurs, the moving assembly is in a first position. When a short-circuit fault occurs, the coil assembly drives the moving assembly to move to a second position to trigger the operating mechanism 3 to trip. Specifically, the coil assembly includes a coil skeleton 42 and a coil 41 wound around the outside of the coil skeleton 42. The moving assembly includes a moving iron core 43. , a static iron core and a reset spring, the static iron core is fixedly arranged at one end of the coil skeleton 42. In the present embodiment, the static iron core is arranged at one end of the coil skeleton 42 close to the operating mechanism 3, and the moving iron core 43 is slidably arranged at the other end of the coil skeleton 42. A reset spring is arranged between the moving iron core 43 and the static iron core, and the moving iron core 43 is reset by the reset spring, that is, the moving iron core 43 is driven to move to the first position, and the push rod 44 connected to the moving iron core 43 slides through the through hole in the middle of the static iron core, and the push rod 44 is relative to the lock buckle of the operating mechanism 3 for pushing the lock buckle to disengage and rotate.

[0069] The time-delay protection mechanism 5 is arranged between the operating mechanism 3 and a terminal. The time-delay protection mechanism 5 includes a bimetallic strip 51 and a connecting plate 52. The fixed end of the bimetallic strip 51 is connected to a terminal through the connecting plate 52. The movable end of the bimetallic strip 51 is opposite to the operating mechanism 3, and the movable end of the bimetallic strip 51 and the moving component are respectively located on both sides of the operating mechanism 3. When an overload fault occurs, the bimetallic strip 51 is bent by heat, and the movable end of the bimetallic strip 51 cooperates with the tripping rod of the operating mechanism 3 to drive the lock to rotate and make the operating mechanism 3 trip.

[0070] In this embodiment, the handle mechanism 2, the operating mechanism 3, the contact mechanism, the short-circuit protection mechanism 4 and the time-delay protection mechanism 5 all adopt the existing technology.

[0071] like Figure 1 , 2 As shown, a short circuit indicator mechanism 6 is also disposed in the housing 1, wherein the short circuit indicator mechanism 6 is arranged on a side of the short circuit protection mechanism 4 away from the operating mechanism 3, and the short circuit indicator mechanism 6 is arranged along the inner side position of the operating end 10, as shown in FIG. Figure 5-14As shown, the short-circuit indicating mechanism 6 includes a short-circuit indicating member 61 and a first elastic member 62, wherein the short-circuit indicating end 611 of the short-circuit indicating member 61 corresponds to the short-circuit indicating hole 11 opened in the housing 1, preferably, the short-circuit indicating hole 11 and the handle hole are opened side by side at the operating end 10, and the short-circuit indicating hole 11 is located at the side position of the operating end 10 close to a terminal, the limiting end 612 of the short-circuit indicating member 61 is limitedly matched with the moving component of the short-circuit protection mechanism 4, and the first elastic member 62 is connected between the short-circuit indicating member 61 and the housing 1, when the moving component is in contact with the short-circuit indicating member 61, the short-circuit indicating hole 11 is opened side by side with the handle hole, and the short-circuit indicating hole 11 is located at the side position of the operating end 10 close to a terminal, and the limiting end 612 of the short-circuit indicating member 61 is limitedly matched with the moving component of the short-circuit protection mechanism 4, and the first elastic member 62 is connected between the short-circuit indicating member 61 and the housing 1. After the limiting end 612 of the short-circuit indicator 61 is released from the limiting cooperation, the first elastic member 62 drives the short-circuit indicator 61 to move, so that the short-circuit indicator end 611 of the short-circuit indicator 61 pops out of the short-circuit indicator hole 11 to indicate the occurrence of a short-circuit fault. After the fault is eliminated, pressing the short-circuit indicator end 611 of the short-circuit indicator 61 can overcome the elastic force of the first elastic member 62. After returning to the original position, the short-circuit indicator 61 re-limits and cooperates with the moving component. The short-circuit indicator mechanism 6 has the advantages of simple structure, small space occupation and high degree of cooperation with the short-circuit protection mechanism 4.

[0072] Further, such as Figure 7-14 As shown, the short circuit indicator 61 is also provided with a reset end 614, and the reset end 614 extends to one side of the handle mechanism 2. Figure 7 , 8 , 10 and 11, the reset end 614 extends to the lower side of the handle mechanism 2. After the short circuit fault is eliminated, the handle mechanism 2 can be rotated to drive the short circuit indicator 61 to return to its original position, and the moving component and the short circuit indicator 61 returned to its original position are re-limited and matched. Preferably, a second elastic member 63 is provided between the reset end 614 and the handle mechanism 2, one end of the second elastic member 63 is connected to the short circuit indicator 61, and the other end is elastically matched with the handle mechanism 2. The handle mechanism 2 drives the reset end 614 through the second elastic member 63, thereby ensuring the stable matching of the handle mechanism 2 and the short circuit indicator 61.

[0073] Specifically, Figure 7-9 As shown, when the moving assembly and the short-circuit indicator 61 are in a limited matching state, the energy storage part of the energy storage rocker arm 22 abuts against the second elastic member 63, and the handle body 21 is in a separated state from the second elastic member 63 during the opening and closing rotation process. At this time, the short-circuit indicator 61 in the limited state will not be driven by the energy storage part of the energy storage rocker arm 22; Figure 10-12As shown, when the moving assembly is separated from the short-circuit indicator 61, the handle body 21 turned to the opening position abuts against the second elastic member 63, and the energy storage rocker arm 22 is separated from the second elastic member 63. When the short-circuit indicator 61 needs to be reset, the operating handle body 21 is first rotated to the closing position, and the energy storage rocker arm 22 rotates accordingly and makes the energy storage part of the energy storage rocker arm 22 abut against the second elastic member 63 again, and then the handle mechanism 2 is rotated to the opening position. During the rotation process, the energy storage part drives the reset end 614 by pressing the second elastic member 63, so that the short-circuit indicator 61 returns to its original position, and the moving assembly is again limitedly matched with the short-circuit indicator 61.

[0074] Combination Figure 5-14 A specific structure of a short circuit indication mechanism 6 is provided.

[0075] like Figure 5 As shown, the short circuit indicating mechanism 6 includes a short circuit indicating member 61, a first elastic member 62 and a second elastic member 63. Fig. 9 , 12 As shown in FIG. 14, the short-circuit indicator 61 includes a first straight plate, one end of the first straight plate serves as a short-circuit indicator end 611, the other end of the first straight plate is connected to a second straight plate, the second straight plate and the plane where the first straight plate is located are parallel to each other, one end of the second straight plate away from the first straight plate serves as a limit end 612, and a through hole serving as a limit groove 613 is opened in the middle of the plate surface of the second straight plate, as shown in FIG. Fig. 9 As shown, when the moving assembly is in the first position, the end of the moving iron core 43 away from the static iron core is inserted into the limiting groove 613, so as to achieve the limiting cooperation between the moving assembly and the short-circuit indicator 61. Fig.12 As shown, when the movable component is in the second position, the end of the moving iron core 43 away from the static iron core is separated from the limiting groove 613. The limiting groove 613 has the advantages of simple processing and low cost, and has high reliability when matched with the moving iron core 43. Of course, the movable component can also adopt other methods to match with the limiting end 612; the other end of the first straight plate is also connected to the third straight plate, and the third straight plate is perpendicular to the plane where the first straight plate is located as the reset end 614, and one side of the third straight plate is used as the first abutment portion 616. A slot is provided on the other side of the third straight plate, and one end of the slot is provided in a direction parallel to the plate surface of the third straight plate, and the other end of the slot is provided along the connection between the first straight plate and the third straight plate, so that the slot is an L-shaped slot as a whole; at least one first stop portion 615 is protrudingly provided on the side of the first straight plate facing away from the third straight plate, Fig.13 , 14 In the embodiment, the first stop portion 615 is a strip-shaped convex rib, and the length of the first stop portion 615 is less than the length of the first straight plate.

[0076] When the short-circuit indicator 61 is assembled in the housing 1, the short-circuit indicator end 611 corresponds to the short-circuit indicator hole 11 and can slide through the short-circuit indicator hole 11 and extend out of the housing 1. When the short-circuit indicator end 611 pops out of the short-circuit indicator hole 11, the first stopper 615 can cooperate with the housing 1 to limit the movement of the short-circuit indicator 61. Preferably, as Figure 4 As shown, a first mounting portion 13 is provided in the housing 1 opposite to the short-circuit indicating hole 11. The first mounting portion 13 is spaced relative to the first abutting portion 616 for assembling the first elastic member 62. Preferably, when the first elastic member 62 is not deformed, its axial length is greater than the length of the second straight plate. In the present embodiment, the first elastic member 62 is a spring, and the deformation direction of the spring is parallel to the moving direction of the short-circuit indicating member 61, that is, the first elastic member 62 undergoes elastic deformation along a direction parallel to the central axis of the short-circuit indicating hole 11.

[0077] like Figure 5-8 As shown in FIGS. 10 and 11, the second elastic member 63 is a spring sheet, the middle part of which is bent so that the second elastic member 63 is V-shaped as a whole, and the first end of the second elastic member 63 is obliquely arranged between the reset end 614 and the handle mechanism 2. When the short-circuit indicator 61 pops out of the short-circuit indicator hole 11, the energy storage part of the energy storage rocker arm 22 presses the first end of the second elastic member 63, so that the first end of the second elastic member 63 is deformed in the direction close to the reset end 614 and can drive the short-circuit indicator 61 to reset during its elastic deformation. When the passive iron core 43 of the short-circuit indicator 61 is limited, the handle body 21 abuts against the first end of the second elastic member 63; the second end of the second elastic member 63 is inserted into the slot in a direction parallel to the surface of the third straight plate. In the figure, the second end of the second elastic member 63 is folded back to form a hook shape and extends to the surface of the third straight plate at the connection point corresponding to the first straight plate and the third straight plate. The hook shape is conducive to improving the connection stability between the second elastic member 63 and the slot.

[0078] It should be noted that the short-circuit indicator 61 , the first elastic member 62 and the second elastic member 63 are not limited to the above description.

[0079] like Figure 2 , 15As shown in -18, a delay indicating mechanism 7 is provided in the housing 1, wherein the delay indicating mechanism 7 is provided in the housing 1 between the operating mechanism 3 and a terminal, and the delay indicating mechanism 7 is provided along the side position close to the operating terminal 10, the delay indicating mechanism 7 comprises a delay indicating member 71, a locking member 72 and a third elastic member 73, the delay indicating end 711 of the delay indicating member 71 corresponds to the delay indicating hole 12 provided in the housing 1, preferably, the delay indicating hole 12 is provided side by side with an operating hole, the locking end 712 of the delay indicating member 71 is limitedly cooperated with the locking member 72, and the third elastic member 73 is connected between the delay indicator 71 and the housing 1. When the bimetallic strip 51 triggers the operating mechanism 3 to trip, the bimetallic strip 51 drives the locking piece 72 to release the limiting cooperation with the locking end 712 of the delay indicator 71, and the third elastic piece 73 drives the delay indicator 71 to move, so that the delay indicating end 711 of the delay indicator 71 pops out of the delay indicating hole 12, thereby indicating that an overload fault has occurred. After the fault is eliminated, pressing the delay indicating end 711 of the delay indicator 71 can overcome the elastic force of the third elastic piece 73, and the delay indicator 71 returns to its original position and is limitedly cooperated with the locking piece 72 again.

[0080] Furthermore, one end of the locking piece 72 is limitedly assembled, and the other end of the locking piece 72 is provided with a locking portion 721 and an unlocking portion 722. The locking end 712 of the delay indicator 71 is provided with a matching portion 713, and the matching portion 713 is limitedly matched with the locking portion 721. The movable end of the bimetallic strip 51 pushes the unlocking portion 722 to separate the matching portion 713 from the locking portion 721. Of course, the unlocking portion 722 can also be provided on the delay indicator 71. At this time, the delay indicator 71 is pushed by the movable end of the bimetallic strip 51.

[0081] Preferably, the locking member 72 includes at least one guide surface, and at least one guide surface is connected to one side of the locking portion 721. When the delay indicating end 711 of the delay indicating member 71 pops out of the delay indicating hole 12, the matching portion 713 maintains contact with the guide surface. After eliminating the overload fault, the delay indicating end 711 of the delay indicating member 71 is pressed to overcome the elastic force of the third elastic member 73. The matching portion 713 slides along the guide surface until it is limitedly engaged with the locking portion 721. The matching portion 713 always maintains contact with the guide surface, which is beneficial to improving the matching stability between the delay indicating member 71 and the locking member 72. Of course, the guide surface can also be omitted.

[0082] Combination Figure 2 , 4 , 15-18 provide a specific structure of a delay indication mechanism 7.

[0083] like Figure 15-18As shown, the delay indicating mechanism 7 includes a delay indicating member 71, a locking member 72 and a third elastic member 73, wherein the delay indicating member 71 includes a fourth straight plate, one end of the fourth straight plate serves as a delay indicating end 711 corresponding to the delay indicating hole 12 provided in the housing 1, the other end of the fourth straight plate is connected to a fifth straight plate, the plane where the fifth straight plate is located is perpendicular to the plane where the fourth straight plate is located, the end of the fifth straight plate away from the fourth straight plate is connected to a sixth straight plate, the plane where the sixth straight plate is located is perpendicular to the plane where the fifth straight plate is located, the end of the sixth straight plate away from the fifth straight plate serves as a locking end 712, and a matching portion 713 is provided on one side surface of the locking end 712, and the matching portion 713 is a protruding setting As for the boss structure of the locking end 712, in the figure, the locking end 712 and the delay indicating end 711 are respectively located on both sides of the plate surface of the fifth straight plate, so that the delay indicating member 71 is in a "ㄣ" shape as a whole, and the fifth straight plate serves as the second stop portion 714 and the second abutment portion 715 at the same time, that is, the side of the fifth straight plate facing the delay indicating hole 12 serves as the second stop portion 714, and the second stop portion 714 cooperates with the shell 1 to limit the movement trajectory of the delay indicating member 71. Of course, the delay indicating member 71 can also be provided with at least one second stop portion 714, and the side of the fifth straight plate facing away from the delay indicating hole 12 serves as the second abutment portion 715, which is used to cooperate with the third elastic member 73.

[0084] When the delay indicator 71 is disposed in the housing 1, a third elastic member 73 is disposed between the second abutting portion 715 and the housing 1. Figure 4 As shown, a second mounting portion 14 is provided in the housing 1 and is spaced opposite to the delay indicating hole 12, and a third elastic member 73 is provided between the second mounting portion 14 and the second abutting portion 715. In the figure, the third elastic member 73 is a spring, and the deformation direction of the third elastic member 73 is parallel to the central axis direction of the delay indicating hole 12.

[0085] like Figure 15-18If the locking cam 72 is in the state of being moved forward, the locking cam 721 can be turned into the state where the lock 71 is located, and the locking cam 722 can be turned into the state where the lock 71 is located. The locking portion 722 extends to one side of the bimetallic strip 51. When the bimetallic strip 51 does not trigger the tripping of the operating mechanism 3, the locking portion 721 and the matching portion 713 are limited and matched. The matching portion 713 is correspondingly located between the bimetallic strip 51 and the locking portion 721. The bimetallic strip 51 and the unlocking portion 722 are spaced and opposite to each other. When the bimetallic strip 51 is bent by heat to trigger the tripping of the operating mechanism 3, the bimetallic strip 51 pushes the unlocking portion 722, so that the end of the locking member 72 provided with the locking portion 721 slightly swings within a certain range. The locking member 72 can be unlocked by moving a small distance, and the space occupied in the housing 1 is small, so that the matching portion 713 is separated from the locking portion 721, and the delay indicating end 711 is driven by the third elastic member 73 to extend out of the delay indicating hole 12. After eliminating the overload fault, the delay indicating end 711 is manually pressed, and the delay indicating member 71 returns to its original position after overcoming the elastic force of the third elastic member 73, so that the matching portion 713 and the locking portion 721 are limited and matched again.

[0086] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0087] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing (1), wherein the housing (1) is rotatably provided with a handle mechanism (2), wherein an operating mechanism (3), a short-circuit protection mechanism (4) and a time-delay protection mechanism (5) are provided inside the housing (1), wherein the handle mechanism (2) is linked to the operating mechanism (3), and the short-circuit protection mechanism (4) and the time-delay protection mechanism (5) are respectively used to trigger the operating mechanism (3) to trip, and wherein: It also includes a short circuit indication mechanism (6) and a time delay indication mechanism (7), and the housing (1) is provided with a short circuit indication hole (11) and a time delay indication hole (12). The short-circuit indicating mechanism (6) comprises a short-circuit indicating member (61) and a first elastic member (62); the short-circuit protection mechanism (4) limits the short-circuit indicating member (61) in a normal working state and causes the first elastic member (62) to store energy; when the short-circuit protection mechanism (4) is in action, the short-circuit indicating member (61) is released from the limit, and the first elastic member (62) releases energy to drive the short-circuit indicating member (61) to cooperate with the short-circuit indicating hole (11) to indicate; The time delay indicating mechanism (7) comprises a time delay indicating member (71), a locking member (72) and a third elastic member (73); when the time delay protection mechanism (5) is in a normal working state, the locking member (72) and the time delay indicating member (71) are limitedly matched and the third elastic member (73) stores energy; when the time delay protection mechanism (5) is actuated, the locking member (72) is triggered to separate from the time delay indicating member (71), and the third elastic member (73) releases energy to drive the time delay indicating member (71) to match and indicate with the time delay indicating hole (12).

2. The circuit breaker according to claim 1, characterized in that: The short-circuit protection mechanism (4) comprises a moving component that moves between a first position and a second position, the short-circuit indicator (61) comprises a short-circuit indicator end (611) and a limit end (612), the moving component is in limited cooperation with the limit end (612) at the first position, and after the moving component moves to the second position and separates from the limit end (612), the first elastic component (62) drives the short-circuit indicator end (611) to pop out of the short-circuit indicator hole (11); The time-delay protection mechanism (5) comprises a bimetallic strip (51), and the time-delay indicator (71) comprises a time-delay indicator end (711) and a locking end (712). After the bimetallic strip (51) is bent by heat and the locking end (712) is triggered to separate from the locking element (72), the third elastic element (73) drives the time-delay indicator end (711) to pop out of the time-delay indicator hole (12).

3. The circuit breaker according to claim 2, characterized in that: The short circuit indicator (61) further comprises a reset end (614), wherein the reset end (614) extends to one side of the handle mechanism (2), and after the short circuit indicator end (611) pops out of the short circuit indicator hole (11), The short circuit indicating end (611) is pressed or the handle mechanism (2) is rotated to drive the reset end (614), so that the limiting end (612) of the short circuit indicating member (61) is limitedly matched with the moving assembly located at the first position.

4. The circuit breaker according to claim 3, characterized in that: A second elastic member (63) is also provided between the reset end (614) and the handle mechanism (2); one end of the second elastic member (63) is connected to the short-circuit indicator (61), and the other end is elastically matched with the handle mechanism (2).

5. The circuit breaker according to claim 4, characterized in that: The handle mechanism (2) comprises a handle body (21), the handle body (21) being provided with a receiving groove, in which a handle spring and an energy storage rocker arm (22) are coaxially rotatably mounted. When the moving assembly is limitedly matched with the short-circuit indicator (61), the energy storage part of the energy storage rocker arm (22) is matched with the second elastic member (63), and the handle body (21) is separated from the second elastic member (63) during the opening and closing rotation process; When the moving assembly is separated from the short-circuit indicator (61), the handle body (21) turned to the opening position abuts against the second elastic member (63), and the energy storage rocker arm (22) is separated from the second elastic member (63).

6. The circuit breaker according to claim 2, characterized in that: The limiting end (612) is provided with a limiting groove (613), and when the moving component is in the first position, one end of the moving component away from the operating mechanism (3) is in limiting cooperation with the limiting groove (613).

7. The circuit breaker according to claim 1 or 2, characterized in that: The short-circuit protection mechanism (4) comprises a coil assembly and a moving assembly driven by the coil assembly, the coil assembly comprising a coil frame (42) and a coil (41) wound around the outside of the coil frame (42), the moving assembly being arranged in the middle of the coil frame (42), the moving assembly comprising a moving iron core (43), a stationary iron core and a reset spring, the stationary iron core being fixed to one end of the coil frame (42), the moving iron core (43) being slidably arranged at the other end of the coil frame (42), a reset spring being connected between the moving iron core (43) and the stationary iron core, one end of the moving iron core (43) being connected to a push rod (44) passing through the stationary iron core, and the other end of the moving iron core (43) being limitedly matched with a short-circuit indicator (61).

8. The circuit breaker according to claim 2, characterized in that: One end of the locking member (72) is limitedly assembled with the housing (1), and the other end of the locking member (72) is provided with a locking portion (721) and an unlocking portion (722). The locking end (712) is provided with a matching portion (713), and the matching portion (713) is limitedly matched with the locking portion (721). The movable end of the bimetallic strip (51) pushes the unlocking portion (722) to separate the matching portion (713) from the locking portion (721).

9. The circuit breaker according to claim 8, characterized in that: The locking member (72) comprises at least one guide surface, and at least one guide surface is connected to one side of the locking portion (721). After the delay indicating end (711) pops out of the delay indicating hole (12), the delay indicating end (711) is pressed to drive the matching portion (713) to slide along the guide surface until it is limitedly matched with the locking portion (721).

10. The circuit breaker according to claim 1, characterized in that: The opposite ends of the housing (1) serve as wiring terminals respectively, and one side of the housing (11) connected between the two wiring terminals protrudes outward to form an operating terminal (10), the short circuit indication hole (11) is located at a side position of the operating terminal (10) close to one wiring terminal, and the delay indication hole (12) is located at a side position of the other wiring terminal close to the operating terminal (10).

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