Molded case circuit breakers

Abstract

The present invention relates to the field of low-voltage electrical appliances, and in particular to a molded case circuit breaker, which comprises a circuit breaker body, an electric operating device and a locking device; the circuit breaker body comprises an operating mechanism, and the operating mechanism comprises a handle; the electric operating device comprises a slider driven and matched with the handle, and the slider slides back and forth to drive the handle to swing, so as to close / open the molded case circuit breaker; the locking device comprises a rotatably arranged locking member; when the molded case circuit breaker is in the open state, the slider is located in the open position, and the operating locking member is rotated to cooperate with the slider limit to prevent the slider from sliding; the molded case circuit breaker of the present invention can reliably lock the circuit breaker in the open state and has high safety.

Description

Technical Field

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

[0002] Existing molded case circuit breakers often have the following problems:

[0003] 1. The slider of the electric operating device of the existing molded case circuit breaker has two detachable guide plates. During the opening and closing operations, the cam cooperates with the two guide plates to drive the slider to move. The slider has a complex structure and a high height. During the long opening and closing operations, it will move or detach, which will eventually affect the reliability of the product.

[0004] Second, existing molded case circuit breakers cannot be locked or have low locking reliability when in the open state. They can still detect signals for automatic closing, which is less safe.

[0005] 3. Existing molded case circuit breakers generally use cage-type terminals. When the base height is reduced, the cage-type terminals cannot be completely accommodated in the base, resulting in a reduction in creepage distance.

[0006] Fourth, the arc extinguishing chamber of the existing molded case circuit breaker is not well ventilated, which affects the breaking performance and power safety. Summary of the Invention

[0007] The object of the present invention is to overcome the defects of the prior art and provide a molded case circuit breaker which can reliably lock the circuit breaker in an open state and has high safety.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A molded case circuit breaker comprises a circuit breaker body 1, an electric operating device 2 and a locking device 6; the circuit breaker body 1 comprises an operating mechanism 3, the operating mechanism 3 comprises a handle 30; the electric operating device 2 comprises a slider 26-0 driven and engaged with the handle 30, the slider 26-0 slides back and forth to drive the handle 30 to swing, thereby closing / opening the molded case circuit breaker; the locking device 6 comprises a rotatably arranged locking member 63; when the molded case circuit breaker is in the open state, the slider 26-0 is located in the open position, and the operating locking member 63 rotates to engage with the slider 26-0 to prevent the slider 26-0 from sliding.

[0010] Preferably, when the molded case circuit breaker is in the closed state, the slider 26 - 0 is located at the closed position, and the slider 26 - 0 is limitedly engaged with the locking member 63 to prevent the locking member 63 from rotating.

[0011] Preferably, the locking member 63 includes a locking boss 631 , and the locking boss 631 includes a locking boss surface 6310 ;

[0012] When the molded case circuit breaker is in the open state, the locking piece 63 rotates so that the locking boss 6310 is perpendicular to the sliding direction of the slider 26-0 and is limited by the slider 26-0 to prevent the slider 26-0 from sliding; when the molded case circuit breaker is in the closed state, the locking boss 6310 is parallel to the sliding direction of the slider 26-0, and the slider 26-0 is limited by the locking boss 6310 to prevent the locking piece 63 from rotating.

[0013] Preferably, the slider 26-0 includes a slider locking structure 26-03, and the slider locking structure 26-03 includes a first limiting side 26-030 and a first locking side 26-031 that are perpendicular to each other. The first limiting side 26-030 is limited by the locking boss 6310 to prevent the locking member 63 from rotating, and the locking boss 6310 is limited by the first locking side 26-031 to prevent the slider 26-0 from sliding.

[0014] Preferably, the electric operating device 2 also includes a transmission main shaft 25-0, a turntable 25-5 installed on the transmission main shaft 25-0 and rotating coaxially therewith, and a cam 25-6 installed on the turntable 25-5; the slider 26-0 includes a slider actuated groove 26-00 and a slider driving groove 26-01, the cam 25-6 is driven and cooperated with the slider actuated groove 26-00, driving the slider 26-0 to slide reciprocatingly, and the handle 30 is inserted into the slider driving groove 26-01 and is driven and cooperated with it.

[0015] Preferably, the electric operating device 2 further includes an indicator disk 25-1 mounted on the transmission main shaft 25-0 and coaxially linked therewith; the molded case circuit breaker further includes a switching push rod 24-0 that is slidably arranged and can block and avoid the transmission main shaft 25-0.

[0016] Preferably, the molded case circuit breaker also includes a first microswitch 22-1, a second microswitch 22-2, a third microswitch 22-3 and a fourth microswitch 22-4, which are respectively a travel microswitch, a manual-automatic switching microswitch, a locking microswitch and a reset microswitch; the first microswitch 22-1 is driven and cooperated with the indicator disk 25-1, the second microswitch 22-2 is driven and cooperated with the switching push rod 24-0, the third microswitch 22-3 is driven and cooperated with the locking device 6, and the fourth microswitch 22-4 is driven and cooperated with the slider 26-0.

[0017] Preferably, the locking member 63 also includes a locking member driving protrusion 632, and the locking device 6 is driven to cooperate with the third micro switch 22-3 through the locking member driving protrusion 632; the locking member 63 includes a locking member body 630 with a cylindrical structure, and the locking member driving protrusion 632 and the locking boss 631 are arranged at the radial ends of the locking member body 630, and are located at the axial ends of the locking member body 630.

[0018] Preferably, the electric operating device 2 includes a slider bracket, the slider 26-0 is arranged in the middle of the slider bracket, and the slider bracket includes an upper bracket 20-3 and a lower bracket 20-2 arranged oppositely;

[0019] The upper bracket 20-3 includes an upper bracket main board 20-30 and an upper bracket first arm 20-31 and an upper bracket second arm 20-32 respectively connected to the ends of the upper bracket main board 20-30 by bending, and the free ends of the upper bracket first arm 20-31 and the upper bracket second arm 20-32 are both provided with an upper bracket limit platform 20-33;

[0020] The lower bracket 20-2 includes a lower bracket main board 20-20 and a lower bracket first arm 20-21 and a lower bracket second arm 20-22 respectively provided at both ends of the lower bracket main board 20-20 and connected to the lower bracket main board 20-20. The connection between the lower bracket main board 20-20 and the lower bracket first arm 20-21 and the connection between the lower bracket main board 20-20 and the lower bracket second arm 20-22 are both provided with lower bracket limiting holes 20-23;

[0021] The upper bracket main board 20-30 is opposite to the lower bracket main board 20-20, the upper bracket first arm 20-31 and the lower bracket first arm 20-21 are stacked together to form the first side wall of the bracket, the upper bracket second arm 20-32 and the lower bracket second arm 20-22 are stacked together to form the second side wall of the bracket, the upper bracket first arm 20-31 and the upper bracket second arm 20-32 are located between the lower bracket first arm 20-21 and the lower bracket second arm 20-22, and each upper bracket limit platform 20-33 is inserted into a lower bracket limit hole 20-23.

[0022] Preferably, the electric operating device 2 further includes a slide rail 26 - 1 for limiting and guiding the slider 26 - 0 . The slide rail 26 - 1 is arranged in the middle of the slider bracket, and its two ends are fixedly connected to the first side wall of the bracket and the second side wall of the bracket respectively.

[0023] Preferably, the slider bracket further includes a bracket avoidance hole 20-4 provided on the first side wall of the bracket. When the molded case circuit breaker is in the open state, the free end of the slider locking structure 26-03 of the slider 26-0 is inserted into the bracket avoidance hole 20-4.

[0024] Preferably, the electric operating device 2 also includes a device bracket 20-1 and a slider bracket, and the device bracket 20-1, the slider bracket and the circuit breaker body 1 are arranged in sequence and connected in sequence; the slider 26-0 is arranged in the slider bracket; the transmission main shaft 25-0 of the electric operating device 2 is arranged in the middle of the device bracket 20-1, the switching push rod 24-0 is slidably arranged on the device bracket 20-1, and is located above the transmission main shaft 25-0, the locking device 6 is rotationally connected to the device bracket 20-1, the first microswitch 22-1, the second microswitch 22-2 and the third microswitch 22-3 are arranged on one side of the device bracket 20-1, the fourth microswitch 22-4 is arranged on the other side of the device bracket 20-1, and the fourth microswitch 22-4 and the slider bracket are located on the same side of the device bracket 20-1.

[0025] Preferably, the locking device 6 includes a lock core 60, a gasket 61, a positioning member 62 and a locking member 63; the device bracket 20-1 of the electric operating device 2 also includes a locking device mounting hole, the positioning member 62 is inserted into the locking device mounting hole, one end of the locking device 6 is the socket end of the lock core 60, protruding on one side of the device bracket 20-1, and an annular platform is provided on the outside of the end, the annular platform and the gasket 61 are respectively located on both sides of the device bracket 20-1 and are respectively limited by the device bracket 20-1, and the locking member 63 is arranged at the other end of the locking device 6 and is linked with the lock core 60.

[0026] The locking device of the molded case circuit breaker of the present invention directly cooperates with the slider through a locking member, so that once the slider is locked, the molded case circuit breaker cannot be closed, thereby ensuring the safety of users' electricity use. In addition, the slider is an integrated structure, which is reliable and strong, ensuring the reliable operation of the electric operating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the molded case circuit breaker of the present invention, showing at least the positional relationships of the first micro switch, the second micro switch, and the third micro switch with the indicator plate, the switching push rod, and the locking device respectively;

[0028] Figure 2 It is a structural schematic diagram of the molded case circuit breaker of the present invention, which at least shows the structure of the slider bracket;

[0029] Figure 3 It is a schematic structural diagram of the electric operating device of the present invention, and the molded case circuit breaker is in the closed state;

[0030] Figure 4 It is a schematic structural diagram of the electric operating device of the present invention, and the molded case circuit breaker is in the open state;

[0031] Figure 5 It is a schematic diagram of the transmission relationship structure of the transmission main shaft, turntable, cam and slider of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the lower bracket of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the slider of the present invention;

[0034] Figure 8 Schematic diagram of the structure of the electric operating device of the present invention, the molded case circuit breaker is in the open state, and the locking member of the locking device drives the protrusion to press the driving rod of the third micro switch;

[0035] Figure 9 This is a schematic diagram of the structure of the electric operating device of the present invention. The molded case circuit breaker is in the open state. The locking boss of the locking device is limitedly engaged with the first locking side surface of the locking structure to prevent the slider from sliding.

[0036] Figure 10 Schematic diagram of the structure of the electric operating device of the present invention, the molded case circuit breaker is in the closed state, and the locking member of the locking device drives the protrusion to release the driving rod of the third micro switch;

[0037] Figure 11 Schematic diagram of the structure of the electric operating device of the present invention. The molded case circuit breaker is in the closed state. The locking boss of the locking device is limitedly engaged with the first limiting side of the locking structure to prevent the locking member from rotating.

[0038] Figure 12 It is a structural schematic diagram of the locking device of the present invention;

[0039] Figure 13 It is a schematic structural diagram of the locking member of the present invention;

[0040] Figure 14 It is a structural diagram of the circuit breaker body of the present invention, which at least shows the matching relationship between the terminal cover and the connection terminal;

[0041] Figure 15 Schematic diagram of the positional relationship between the first terminal cover and the arc extinguishing chamber of the present invention;

[0042] Figure 16 Schematic diagram of the matching relationship between the first terminal cover and the first connecting terminal of the present invention;

[0043] Figure 17 It is a schematic structural diagram of the first terminal cover of the present invention;

[0044] Figure 18 Schematic diagram of the matching relationship between the second terminal cover and the second connecting terminal of the present invention;

[0045] Figure 19 is a schematic structural diagram of the second terminal cover of the present invention;

[0046] Figure 20 Schematic diagram of the matching relationship between the second connecting plate, the second terminal cover and the second terminal of the present invention;

[0047] Figure 21 It is a structural schematic diagram of the base of the present invention;

[0048] Figure 22 It is a structural schematic diagram of the cover of the present invention. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-22 The following examples further illustrate the specific implementation of the molded case circuit breaker of the present invention. The molded case circuit breaker of the present invention is not limited to the description of the following examples.

[0050] like Figure 1 、 2 As shown in Figure 14, the molded case circuit breaker of the present invention includes a circuit breaker body 1, which includes a body shell 1a. The body shell 1a includes a cover 10a and a base 11a that are joined together. The body shell 1a also includes at least one pole chamber, each pole chamber is provided with a terminal at both ends, and each pole chamber is provided with a moving contact and a static contact for use in combination in the middle; the molded case circuit breaker also includes an operating mechanism 3, which is driven and connected to a moving contact in one pole chamber, the moving contact is an active contact, and the moving contacts in other pole chambers are linked to the active contact; the operating mechanism 3 includes a handle 30, and the handle 30 is toggled to close / open the molded case circuit breaker.

[0051] Preferably, Figure 2 、 14 -22, an improvement of the molded case circuit breaker of the present invention is that: a terminal cavity is provided at each end of each of the pole chambers, and a wiring terminal is provided in each terminal cavity; each of the terminal cavity is composed of an upper terminal cavity provided on the cover 10a and a lower terminal cavity provided on the base 11a; each of the wiring terminals includes a wiring frame, and the two ends of each wiring frame are respectively provided in the upper terminal cavity and the lower terminal cavity of a terminal cavity; the molded case circuit breaker of the present invention also includes a terminal cover that matches the wiring frame one-to-one, and each terminal cover includes two oppositely arranged terminal cover isolation side walls, and the two terminal cover isolation side walls are respectively provided on both sides of the wiring frame to improve insulation and separate the wiring frame from the shell seam of the main body shell 1a. In the molded case circuit breaker of the present invention, the provision of the terminal cover can significantly increase the creepage distance, ensure the insulation between the pole chambers, and improve the safety of the electrical appliance.

[0052] Further, such as Figure 2 、 14-22, each of the terminal covers further includes a terminal cover limiting side wall, which is respectively connected to the two terminal cover isolation side walls, and the terminal cover limiting side wall is arranged on the side of the terminal frame inner port of the terminal frame, that is, the side close to the molded case circuit breaker. The two ends of the terminal cover limiting side wall are respectively limited and matched with the cover 10a and the base 11a, thereby ensuring the assembly reliability of the terminal cover, thereby preventing the occurrence of a situation where the creepage distance is reduced due to the terminal cover falling off. Further, as Figure 2 、 14 -As shown in FIG. 22, the wiring terminal includes a first wiring terminal 5-0 and a second wiring terminal 5-1. A first terminal cavity and a second terminal cavity are provided at both ends of each pole chamber respectively. The first wiring terminal 5-0 is arranged in the first terminal cavity, and the second wiring terminal 5-1 is arranged in the second terminal cavity. The first wiring terminal 5-0 includes a first wiring frame 5-00, and the second wiring terminal 5-1 includes a second wiring frame 5-10. An arc extinguishing chamber 1-0 is also provided in each pole chamber, and the arc extinguishing chamber outlet of the arc extinguishing chamber 1-0 is opposite to the first wiring terminal 5-0. The terminal cover includes a first terminal cover 4-0 and a second terminal cover 4-1, which respectively cooperate with the first wiring terminal 5-0 and the second wiring terminal 5-1. One end of the first connecting plate 5-03 of the first wiring terminal 5-0 is inserted in the first wiring frame 5-00, and the other end is connected to the internal circuit of the pole chamber. One end of the second connecting plate 5-13 of the second wiring terminal 5-1 is inserted in the second wiring frame 5-10, and the other end is connected to the internal circuit of the pole chamber. Further, as Figure 14-17 As shown, the first terminal cover 4-0 includes two first terminal cover isolation side walls 4-01 arranged opposite to each other and a first terminal cover limiting side wall 4-03. The two first terminal cover isolation side walls 4-01 are arranged on both sides of the first wiring frame 5-00. The first terminal cover limiting side wall 4-03 is respectively connected to the two first terminal cover isolation side walls 4-01 and is arranged on the side of the first wiring frame inner port of the first wiring frame 5-00. The two ends are respectively limited and matched with the cover 10a and the base 11a; one end of the first terminal cover limiting side wall 14-03, which is limited and matched with the base 11a, is against the first connecting plate 5-03, and the other end of the first terminal cover limiting side wall 4-03 protrudes on one side of the first wiring frame 5-00 to form a terminal cover arc extinguishing grid part. The terminal cover arc extinguishing grid part is provided with a plurality of exhaust holes 4-04. The terminal cover arc extinguishing grid part can significantly improve the exhaust efficiency of the arc extinguishing chamber inside the circuit breaker, which is beneficial to improving the arc extinguishing effect of the arc extinguishing chamber 1-0. Further, as Figure 15 and 17As shown, the first terminal cover 4-0 also includes an arc isolation plate 4-06, which is arranged on the side of the terminal cover arc extinguishing grid away from the arc extinguishing chamber 1-0; the first terminal cover 4-0 also includes a first terminal cover top wall 4-02, which is arranged on the upper side of the top wall of the first terminal frame 5-0, and an isolation plate limiting groove 4-05 is provided at the connection between the first terminal cover top wall 4-02 and the first terminal cover limiting side wall 4-03, and one end of the arc isolation plate 4-06 is inserted into the arc isolation plate limiting groove 4-05. In the molded case circuit breaker of the present invention, one end of the arc isolation plate 4-06 is limited, and the other end will undergo a certain deformation when the arc is extinguished and exhausted in the arc extinguishing chamber 1-0, so that the high-temperature gas can be smoothly discharged from the circuit breaker through the arc extinguishing grid of the terminal cover, while also ensuring the protection level and sealing of the molded case circuit breaker; in addition, in the molded case circuit breaker of the present invention, when the arc extinguishing chamber is not provided in the pole chamber, the arc isolation plate 4-06 can be installed on the first terminal cover 4-0, which is beneficial to improve the protection effect.

[0053] It should be pointed out that Figure 1 and 2 As shown, according to actual needs, the molded case circuit breaker of the present invention also includes an electric operating device 2, which includes a slider 26-0. The slider 26-0 is driven and cooperated with the handle 30 of the operating mechanism 3 to drive the handle 30 to swing, so that the molded case circuit breaker is closed / opened.

[0054] Preferably, Figure 8-11 As shown, another improvement of the molded case circuit breaker of the present invention is that: the molded case circuit breaker of the present invention further includes a locking device 6, which includes a rotatable locking member 63; when the molded case circuit breaker is in the open state, the slider 26-0 is in the open position, and the operating locking member 63 is rotated to cooperate with the slider 26-0 to prevent the slider 26-0 from sliding, thereby preventing the molded case circuit breaker from being accidentally closed. Figure 10 and 11 As shown, when the molded case circuit breaker is in the closed state, the slider 26-0 is in the closed position, and the slider 26-0 is limited by the locking member 63 to prevent the locking member 63 from rotating. At this time, the molded case circuit breaker cannot be locked. In the molded case circuit breaker of the present invention, the locking device 6 directly limits the slider 26-0 through the locking member 63, so that once the slider 26-0 is locked, the molded case circuit breaker cannot be closed, thereby ensuring the safety of users' electricity use.

[0055] Preferably, Figure 4-7As shown, another improvement of the molded case circuit breaker of the present invention is that the slider 26-0 is an integrated structure, including a slider passive groove 26-00 and a slider driving groove 26-01. The cam 25-6 of the electric operating device 2 is driven and matched with the slider passive groove 26-00, and the handle 30 of the operating mechanism 3 is inserted into the slider driving groove 26-01. The slider 26-0 of the molded case circuit breaker of the present invention is an integrated structure, which is reliable and firm, ensuring the reliable operation of the electric operating device 2. Further, as Figure 6 As shown, the molded case circuit breaker of the present invention also includes a slide rail 26-1 that limits and guides a slider 26-0. The slide rail 26-1 comprises two parallel bar-shaped rails disposed on either side of the slider 26-0. The slider 26-0 includes a first track block 26-050 and a second track block 26-051 disposed opposite each other. The first track block 26-050 and the second track block 26-051 limit the bar-shaped rails between the first track block 26-050 and the second track block 26-051. The slider 26-0 and the slide rail 26-1 are simple to assemble and provide reliable positioning, thereby improving product production efficiency and reliability.

[0056] like Figure 1 、 2 14 is an embodiment of the molded case circuit breaker of the present invention.

[0057] like Figure 1 、 2 As shown in Figure 14, the molded case circuit breaker of the present invention includes a circuit breaker body 1 and an electric operating device 2. The circuit breaker body 1 includes an operating mechanism 3, the operating mechanism 3 includes a handle 30, and the electric operating device 2 includes a slider 26-0. The slider 26-0 is driven and cooperated with the handle 30. The slider 26-0 slides back and forth, driving the handle 30 to swing, so that the molded case circuit breaker is closed / opened; the circuit breaker body 1 also includes a body shell 1a, the body shell 1a includes a cover 10a and a base 11a joined together, and a plurality of pole chambers arranged side by side and spaced apart are provided in the body shell 1a. Each pole chamber is provided with a terminal cavity at both ends, and each terminal cavity is provided with a wiring terminal; a moving contact and a static contact for use together are provided in the middle of each pole chamber, as well as an arc extinguishing chamber 1-0 for use with the moving contact and the static contact; the operating mechanism 3 is driven and connected to the moving contact of one of the pole chambers, and the moving contact is an active contact. The moving contacts of the other pole chambers are linked with the active contact, and multiple moving contacts can be installed on the contact shaft for linkage.

[0058] Specifically, such as Figure 1 、 2As shown in Figures 1 and 14, the molded case circuit breaker of the present invention is a three-pole circuit breaker, that is, the main body shell 1 is provided with three pole chambers spaced side by side, the operating mechanism 3 is connected to the moving contact of the middle pole chamber, the moving contacts of the pole chambers on both sides are respectively linked to the moving contact of the middle pole chamber, the three moving contacts are all installed on the same contact shaft, and the operating mechanism is connected to the contact shaft.

[0059] Preferably, Figure 1 、 8 As shown in FIG. 13 , the molded case circuit breaker of the present invention further includes a locking device 6. When the molded case circuit breaker is in the open state, the locking device 6 is operated to limit the engagement with the slider 26 - 0 to prevent the slider 26 - 0 from sliding.

[0060] like Figure 1-11 FIG. 1 shows an embodiment of the electric operating device 2 .

[0061] Preferably, Figure 2-7 As shown, the electric operating device 2 includes a rotating turntable 25-5, a cam 25-6 set on the turntable 25-5, a slider 26-0 of an integrated structure, and a slide rail 26-1 for limiting and guiding the slider 26-0; the slider 26-0 includes a slider passive groove 26-00 and a slider driving groove 26-01, the cam 25-6 is driven and cooperated with the slider passive groove 26-00, and the handle 30 is inserted into the slider driving groove 26-01; the turntable 25-5 rotates and drives the slider 26-0 to slide back and forth along the slide rail 26-1 through the cam 25-6, and the slider 26-0 drives the handle 30 to swing through the slider driving groove 26-01 to close / open the molded case circuit breaker. Further, as Figure 6 and 7 As shown, the slider actuated groove 26-00 is set at one end of the slider 26-0, the slider driving groove 26-01 is set in the middle of the slider 26-0, and the slider driving groove 26-01 and the slider actuated groove 26-00 are respectively located on both sides of the slider 26-0, respectively located on the upper side and lower side (front and back) of the slider 26-0. Figure 7 As shown, the slider driving groove 26-01 includes a closing driving side 26-011 and an opening driving side 26-010 which are arranged opposite to each other and respectively cooperate with the handle 30, which is beneficial to improving the reliability of the cooperation between the slider 26-0 and the handle 30.

[0062] Specifically, such as Figure 3 and 4In the direction shown, the slider actuated groove 26-00 is set at the upper right end of the slider 26-0, and the slider driving groove 26-01 is set in the lower middle part of the slider 26-0; the turntable 25-5 rotates, which can drive the slider 26-0 to slide left and right through the cam 25-6 and the slider actuated groove 26-00, and the slider 26-0 drives the handle 30 to swing left and right, thereby realizing the switching of the molded case circuit breaker between the closed and open states.

[0063] Preferably, Figure 1-3 As shown, the electric operating device 2 further includes a motor 25-3, a transmission gear set 25-4 and a transmission main shaft 25-0 which are sequentially driven and connected. The transmission main shaft 25-0 is driven and connected to the turntable 25-5 to drive the turntable 25-5 to rotate.

[0064] Preferably, Figure 6-11 As shown, the molded case circuit breaker also includes a fourth micro switch 22-4, which is a reset micro switch, and the slider 26-0 is a block-shaped structure as a whole, including a slider trigger structure 26-02 arranged at one of its top corners; when the molded case circuit breaker is in the closed state, the slider 26-0 is in the closed position, the slider trigger structure 26-02 drives the fourth micro switch 22-4 to close, and the fourth micro switch 22-4 transmits a closing signal to the circuit board 21 of the electric operating device 2; when the molded case circuit breaker is in the open state, the slider 26-0 is in the open position, and the slider trigger structure 26-02 is away from the fourth micro switch 22-4 to disconnect it; when the molded case circuit breaker is in the tripped state, the slider trigger structure 26-02 is also away from the fourth micro switch 22-4 to disconnect it. Further, as Figure 6 and 7 As shown, the electric operating device 2 also includes a slider reset spring (not shown in the figure), and a slider spring connecting hole 26-06 is provided on the slider trigger structure 26-02 of the slider 26-0. One end of the slider reset spring is connected to the slider spring connecting hole 26-06, and the other end is fixedly arranged to provide the slider 26 with a pulling force in the same direction as the sliding direction when the slider 26-0 drives the molded case circuit breaker to open.

[0065] Specifically, such as Figure 9 As shown, the molded case circuit breaker is in the open state, the slider 26-0 is in the lower position (open position), the slider trigger structure 26-02 is away from the fourth micro switch 22-04, and no longer presses the driving rod of the fourth micro switch 22-4, so that the fourth micro switch 22-4 is disconnected; Figure 11 As shown, the molded case circuit breaker is in the closed state, the slider 26-0 is in the upper position (closed position), and the slider trigger structure 26-02 presses the driving rod of the fourth micro switch 22-4 to close the fourth micro switch 22-4.

[0066] Preferably, Figure 7 、 9 As shown in Figures 11, the slider 26-0 also includes a slider locking structure 26-03; when the molded case circuit breaker is in the open state, the slider 26-0 is located in the open position, and the operating locking member 63 is rotated to cooperate with the slider locking structure 26-03 to prevent the slider 26-0 from sliding and prevent accidental closing operation; when the molded case circuit breaker is in the closed state, the slider 26-0 is located in the closed position, and the slider locking structure 26-03 cooperates with the locking member 63 to prevent the locking member 63 from rotating, and the circuit breaker cannot be locked at this time.

[0067] Preferably, Figure 6 As shown, the slide rail 26-1 includes two bar-shaped rails arranged relatively parallel and respectively arranged on both sides of the slider 26-0; Figure 7 As shown, the slider 26-0 includes a first track block 26-050 and a second track block 26-051 that are arranged opposite to each other, and the first track block 26-050 and the second track block 26-051 limit the bar track between the first track block 26-050 and the second track block 26-051. Figure 7 In the direction shown, the left and right sides of the track block 26-0 are both provided with a first track block 26-050 and a second track block 26-051, and the first track blocks 26-050 and the second track blocks 26-051 on the same side are arranged alternately, that is, the gap between two adjacent second track blocks 26-051 is opposite to a first track block 26-050, and the gap between two adjacent first track blocks 26-050 is opposite to a second track block 26-051, and the left and right sides of the slider 26-0 are respectively opposite to a strip track, and each strip track is limited between the first track block 26-050 and the second track block 26-051.

[0068] Preferably, Figure 1 As shown, the electric operating device 2 further includes a circuit board 21 connected to the motor 25-3, which provides working power and control signals for the motor 25-3. Figure 1 As shown, the circuit board 21, the turntable 25-5, the slider 26-0 and the circuit breaker body 1 are arranged in sequence from top to bottom, and the circuit board 21 is arranged on one side of the transmission main shaft 25-0. The above layout makes the structure of the molded case circuit breaker more compact. Secondly, the circuit board 21 is far away from the circuit breaker body 1, ensuring the reliable operation of the entire electric operating device 2.

[0069] Preferably, Figure 2-6As shown, the electric operating device 2 also includes a slider bracket, the slider 26-0 is arranged in the middle of the slider bracket, and the slider bracket includes an upper bracket 20-3 and a lower bracket 20-2 arranged oppositely; the upper bracket 20-3 includes an upper bracket main board 20-30 and an upper bracket first arm 20-31 and an upper bracket second arm 20-32 respectively connected to the two ends of the upper bracket main board 20-30 by bending, and the free ends of the upper bracket first arm 20-31 and the upper bracket second arm 20-32 are both provided with an upper bracket limit platform 20-33; the lower bracket 20-2 includes a lower bracket main board 20-20 and a lower bracket first arm 20-21 and a lower bracket second arm 20-22 respectively connected to the two ends of the lower bracket main board 20-20 by bending, The connection between the upper bracket 20-20 and the first arm 20-21 of the lower bracket, and the connection between the lower bracket main board 20-20 and the second arm 20-22 of the lower bracket are both provided with a lower bracket limiting hole 20-23; the upper bracket main board 20-30 is opposite to the lower bracket main board 20-20, the upper bracket first arm 20-31 and the lower bracket first arm 20-21 are stacked together to form the first side wall of the bracket, the upper bracket second arm 20-32 and the lower bracket second arm 20-22 are stacked together to form the second side wall of the bracket, the upper bracket first arm 20-31 and the upper bracket second arm 20-32 are located between the lower bracket first arm 20-21 and the lower bracket second arm 20-22, and each upper bracket limiting platform 20-33 is inserted into a lower bracket limiting hole 20-23. Further, as Figure 2 and 6 As shown, both ends of the strip track of the slide rail 26 - 1 are fixedly connected to the first side wall of the bracket and the second side wall of the bracket respectively.

[0070] Preferably, Figure 6 and 8 As shown, the slider bracket also includes a bracket avoidance hole 20-4 set on the first side wall of the bracket. When the molded case circuit breaker is in the open state, the free end of the slider locking structure 26-03 of the slider 26-0 is inserted into the bracket avoidance hole 20-4.

[0071] Preferably, Figure 2 and 3 As shown, the electric operating device 2 also includes a bracket plate 20-5, which is arranged parallel to and spaced apart from the upper bracket main board 20-30, a transmission gear set 25-4 is arranged between the bracket plate 20-5 and the upper bracket main board 20-30, and a transmission main shaft 25-0 is rotationally connected to the bracket plate 20-5 and the upper bracket main board 20-30 respectively.

[0072] Specifically, such as Figure 2 、 3As shown in Figures 6 and 7, the upper bracket 20-3 and the lower bracket 20-4 are both formed by bending and stamping metal plates, and both are of a U-shaped structure. The bracket plate 20-5, the upper bracket 20-3, and the lower bracket 20-2 are arranged in sequence from top to bottom, and the lower bracket 20-2 is fixedly connected to the main body shell 1a.

[0073] Preferably, Figure 1-3 As shown, the electric operating device 2 also includes an indicator disk 25-1 mounted on the transmission main shaft 25-0 and rotating coaxially therewith, and the indicator disk 25-1 is used to indicate the opening and closing status of the circuit breaker; the molded case circuit breaker also includes a switching push rod 24-0 that is slidably arranged and can block and avoid the transmission main shaft 25-0. Figure 1-3 As shown, the molded case circuit breaker also includes a first micro switch 22-1 and a second micro switch 22-2, which are respectively a travel micro switch and a manual-automatic switching micro switch. The first micro switch 22-1 is driven and matched with the indicator plate 25-1, and the second micro switch 22-2 is driven and matched with the switching push rod 24-0. Specifically, as shown in FIG. Figure 1 As shown, when the switching push rod 24-0 blocks the transmission main shaft 25-0, the user cannot use the rocker to operate the transmission main shaft 25-0, the switching push rod 24-0 moves away from the second micro switch 22-2, and the second micro switch 22-2 is closed; when the switching push rod 24-0 avoids the transmission main shaft 25-0, the user can use the rocker to operate the transmission main shaft 25-0, the switching push rod 24-0 presses the driving rod of the second micro switch 22-2, the second micro switch 22-2 is disconnected, and the second micro switch 22-2 is connected to the driving circuit of the motor 25-3. At this time, the motor cannot be used for automatic opening and closing operations, and manual-automatic switching is realized. Specifically, as Figure 5 As shown, the indicator disk 25-1 includes two semicircles, the radius of one semicircle is larger than the radius of the other semicircle, when the small radius semicircle is opposite to the first microswitch 22-1, the driving rod of the first microswitch 22-1 is released, and when the large radius semicircle is opposite to the first microswitch 22-1, the driving rod of the first microswitch 22-1 is pressed, thereby switching the first microswitch 22-1 between closed and open, and is used to transmit an electrical signal indicating opening and closing to the circuit board 21 of the electric operating device 2. Combined with the signals transmitted by the first microswitch 22-1 and the fourth microswitch 22-4, the state of the molded case circuit breaker (i.e., closed state, open state and tripped state) can be determined.

[0074] Preferably, Figure 1 、 8As shown in Figure 10, the electric operating device 2 also includes a device bracket 20-1, and the device bracket 20-1, the slider bracket and the circuit breaker body 1 are arranged in sequence and connected in sequence; the transmission main shaft 25-0 is arranged in the middle of the device bracket 20-1, the switching push rod 24-0 is slidingly arranged on the device bracket 20-1, and is located above the transmission main shaft 25-0. The locking device 6 is rotationally connected to the device bracket 20-1, the first micro switch 22-1 and the second micro switch 22-2 are arranged on one side of the device bracket 20-1, and the fourth micro switch 22-4 driven by the slider 26-0 is arranged on the other side of the device bracket 20-1. The fourth micro switch 22-4 and the slider bracket are located on the same side of the device bracket 20-1. Specifically, as shown in Figure 10, Figure 1 In the direction shown, the device bracket 20-1, the slider bracket and the circuit breaker body 1 are arranged in sequence from top to bottom and are connected in sequence, the first micro switch 22-1 and the second micro switch 22-2 are arranged on the upper side of the device bracket 20-1, and the fourth micro switch 22-4 is arranged on the lower side of the device bracket 20-1.

[0075] like Figure 8-13 FIG. 1 shows an embodiment of the locking device 6 .

[0076] Preferably, Figure 8-11 As shown, the locking device 6 includes a rotatable locking member 63; when the molded case circuit breaker is in the open state, the slider 26-0 is in the open position, and the operating locking member 63 is rotated to cooperate with the slider 26-0 to prevent the slider 26-0 from sliding; when the molded case circuit breaker is in the closed state, the slider 26-0 is in the closed position, and the slider 26-0 cooperates with the locking member 63 to prevent the locking member 63 from rotating.

[0077] Preferably, Figure 13 As shown, the locking member 63 includes a locking boss 631, and the locking boss 631 includes a locking boss surface 6310; Figure 10 and 11 As shown, when the molded case circuit breaker is in the open state, the locking member 63 is rotated so that the locking boss 6310 is perpendicular to the sliding direction of the slider 26-0 and is limited by the slider 26-0 to prevent the slider 26-0 from sliding and prevent the accidental closing operation; Figure 8 and 9 As shown, when the molded case circuit breaker is in the closed state, the locking boss 6310 is parallel to the sliding direction of the slider 26-0, and the slider 26-0 and the locking boss 6310 are limited and matched to prevent the locking member 63 from rotating, making it impossible to operate the slider 26-0. Figure 7As shown, the slider 26-0 includes a slider locking structure 26-03, and the slider locking structure 26-03 includes a first limiting side surface 26-030 and a first locking side surface 26-031 that are perpendicular to each other. The first limiting side surface 26-030 is limited and cooperates with the locking boss surface 6310 to prevent the locking member 63 from rotating. The locking boss surface 6310 is limited and cooperates with the first locking side surface 26-031 to prevent the slider 26-0 from sliding.

[0078] Preferably, Figure 8 and 10 As shown, the molded case circuit breaker of the present invention further includes a third micro switch 22-3, which is a locking micro switch and is driven in conjunction with the locking device 6. Figure 8 、 10 As shown in FIG. 13 , the locking member 63 includes a locking member driving protrusion 632 , and the locking device 6 is driven to cooperate with the third micro switch 22 - 3 via the locking member driving protrusion 632 . Figure 1 、 8 As shown in FIG10 , the third micro switch 22 - 3 , the first micro switch 22 - 1 and the second micro switch 22 - 2 are arranged on the same side of the device bracket 20 - 1 .

[0079] Specifically, such as Figure 10 and 11 As shown, the molded case circuit breaker of the present invention is in the closed state, the locking boss surface 6310 is parallel to the first limiting side surface 26-030 and the two are limited and matched, the locking member 63 cannot rotate and cannot operate to limit the slider 26-0. At this time, the locking member drives the protrusion 632 away from the driving rod of the third micro switch 22-3; Figure 8 and 9 As shown, the molded case circuit breaker of the present invention is in the open state. After the operating locking member 63 is rotated, the locking boss surface 6310 is parallel to the first locking side surface 26-031 and the two are limited and matched. The slider 26-0 is limited and cannot slide to the closed position. At this time, the locking member drives the protrusion 632 to press the driving rod of the third microswitch 22-3. The third microswitch 22-3 provides an electrical signal to indicate whether the locking device 6 is locked in the open state and does not allow closing.

[0080] Preferably, Figure 12 As shown, the locking device 6 includes a lock core 60, a washer 61, a positioning member 62 and a locking member 63; the device bracket 20-1 of the electric operating device 2 also includes a locking device mounting hole, the positioning member 62 is inserted into the locking device mounting hole, one end of the locking device 6 is the socket end of the lock core 60, protruding on one side of the device bracket 20-1, and an annular platform is provided on the outside of the end, the annular platform and the washer 61 are respectively located on both sides of the device bracket 20-1 and are respectively limited with the device bracket 20-1, and the locking member 63 is provided at the other end of the locking device 6 and is linked to the lock core 60. Further, as Figure 13 As shown, the locking member 63 includes a cylindrical locking member body 630 and a locking member driving protrusion 632 and a locking boss 631 arranged at both radial ends of the locking member body 630. The locking member driving protrusion 632 and the locking boss 631 are also respectively located at both axial ends of the locking member body 630. A locking member assembly hole that cooperates with the lock core 60 is provided in the middle of the locking member body 630.

[0081] Specifically, such as Figure 12 As shown, the lock core 60 is driven and connected to the locking member 63 through the positioning member 62, and the washer 61 is sleeved on the outside of the positioning member 62. The positioning member 62 is provided with a positioning member limiting plane, which cooperates with the device bracket 20-1 to prevent the positioning member 62 from rotating together with the lock core 60.

[0082] like Figure 6 and 7 FIG. 1 shows an embodiment of the slider 26 - 0 .

[0083] like Figure 6 and 7 As shown, the slider 26-0 is an integrated structure, which is a block-shaped structure as a whole, including a slider body, a slider actuated groove 26-00, a slider driving groove 26-01, a slider trigger structure 26-02, a first track block 26-050 and a second track block 26-051; the slider actuated groove 26-00 is arranged at one end of the slider body, the slider driving groove 26-01 is arranged in the middle of the slider body, and the slider actuated groove 26-00 and the slider driving groove 26-01 are respectively arranged on the front and back sides of the slider body; A pair of side walls of the slider body are respectively arranged opposite to the two strip tracks of the slide rail 26-1, and a plurality of first track blocks 26-050 and a plurality of second track blocks 26-051 are respectively provided at both ends of each side wall. The first track blocks 26-050 and the second track blocks 26-051 are arranged opposite to each other and staggered. The slider trigger structure 26-02 is arranged at a top corner of the slider body, away from the slider actuated groove 26-00. The slider trigger structure 26-02 is provided with a slider spring connection hole 26-06. Further, as Figure 7 As shown, the slider driving slot 26-01 includes a closing driving side 26-011 and an opening driving side 26-010 which are arranged opposite to each other and respectively cooperate with the handle 30 to drive. Figure 6 and 7 As shown, the slider 26-0 further includes a slider locking structure 26-03, and the slider locking structure 26-03 and the slider triggering structure 26-02 are respectively located at a pair of top corners of the slider body. Figure 7 As shown, the slider locking structure 26-03 includes a first limiting side surface 26-030 and a first locking side surface 26-031 that are perpendicular to each other.

[0084] Specifically, such as Figure 7 Direction shown, Figure 7 The left, right, upper and lower sides of the slider 26-0 are the left, right, front and rear sides respectively. Figure 7 The side facing the reader and the side facing away from the reader are the lower side and the upper side of the slider 26-0 respectively; the slider actuated groove 26-00 is arranged at the upper rear end of the slider 26-0, and the slider driving groove 26-01 is arranged in the middle of the lower side of the slider 26-0; the left and right slider bodies are respectively provided with multiple first track blocks 26-050 and multiple second track blocks 26-051; the slider trigger structure 26-02 is arranged at the left front top corner of the slider body, and the slider locking structure 26-03 is arranged at the right rear top corner of the slider body; the front and rear end surfaces of the slider driving groove 26-01 are respectively the opening driving side 26-010 and the closing driving side 26-011.

[0085] The following will be combined Figure 1-2 , 14-22, describe the terminal cover, the fit between the terminal cover and the main body housing 1a, and the fit between the terminal cover and the connection terminal.

[0086] like Figure 1-2 , 14, 21-22, each of the terminal cavities is composed of an upper terminal cavity provided on the cover 10a and a lower terminal cavity provided on the base 11a, and each terminal includes a wiring frame, and both ends of each wiring frame are respectively provided in the upper terminal cavity and the lower terminal cavity of a terminal cavity; the molded case circuit breaker of the present invention also includes a terminal cover that matches the wiring frame one-to-one, and each terminal cover includes terminal cover isolation side walls that are relatively provided, and the two terminal cover isolation side walls are respectively provided on both sides of the wiring frame to improve insulation and isolate the wiring frame from the shell joint of the main body shell 1a. Specifically, as Figure 1 As shown, the main body shell 1a is formed by joining the cover 10a and the base 11a. There must be a gap at the connection between the two (i.e., the shell seam, which includes not only the gap at the side wall of the main body shell 1a, but also the side wall seam between the pole chambers in the middle of the main body shell 1a). Figure 2 and 14 As shown, when the wiring frame is installed in the terminal cavity, the lower half of the wiring frame is located in the lower terminal cavity, and the upper half is located in the upper terminal cavity, resulting in the side wall of the wiring frame being opposite to the gap between the cover 10a and the base 11a. Compared with the traditional structure in which the wiring frame is completely immersed in the base, its creepage distance is reduced. In the molded case circuit breaker of the present invention, its terminal cover increases the creepage distance, and the isolation side wall isolates the shell joint between the wiring frame and the main body shell 1a, thereby improving the insulation performance of the molded case circuit breaker and the user's electrical safety.

[0087] Preferably, Figure 15-22As shown, each of the terminal covers also includes a terminal cover limiting side wall, which is respectively connected to the two terminal cover isolation side walls. The terminal cover limiting side wall is arranged on one side of the port inside the wiring frame of the wiring frame, and the two ends are respectively limited and matched with the cover 10a and the base 11a to ensure the reliable installation of the terminal cover and avoid the terminal cover falling off.

[0088] Preferably, Figure 15 and 20 As shown, a connecting plate for connecting the terminal and the internal circuit of the pole chamber is inserted in each of the wiring frames. The connecting plate is superimposed on the bottom wall of the wiring frame, and one end of the terminal cover limiting side wall that is limited by the base 11a is against the connecting plate.

[0089] Specifically, such as Figure 2 、 14 -22, the wiring terminal includes a first wiring terminal 5-0 and a second wiring terminal 5-1, and a first terminal cavity and a second terminal cavity are respectively provided at both ends of each pole chamber. The first wiring terminal 5-0 is arranged in the first terminal cavity, and the second wiring terminal 5-1 is arranged in the second terminal cavity. The first wiring terminal 5-0 includes a first wiring frame 5-00, and the second wiring terminal 5-1 includes a second wiring frame 5-10; the arc extinguishing chamber outlet of the arc extinguishing chamber 1-0 is opposite to the first wiring terminal 5-0; the terminal cover includes a first terminal cover 4-0 and a second terminal cover 4-1, which are respectively matched with the first wiring terminal 5-0 and the second wiring terminal 5-1; the connecting plate includes a first connecting plate 5-03 and a second connecting plate 5-13, one end of the first connecting plate 5-03 is inserted in the first wiring frame 5-00, and one end of the second connecting plate 5-13 is inserted in the second wiring frame 5-10.

[0090] Preferably, Figure 16 and 17 As shown, the first terminal cover 4-0 includes two oppositely arranged first terminal cover isolation side walls 4-01 and a first terminal cover limiting side wall 4-03, the two first terminal cover isolation side walls 4-01 are arranged on both sides of the first wiring frame 5-00, the first terminal cover limiting side wall 4-03 is respectively connected to the two first terminal cover isolation side walls 4-01, and is arranged on one side of the first wiring frame inner port of the first wiring frame 5-00, and the two ends are respectively limited and matched with the cover 10a and the base 11a; one end of the first terminal cover limiting side wall 4-03 that is limited and matched with the base 11a is abutted against the first connecting plate 5-03, and the other end of the first terminal cover limiting side wall 4-03 protrudes on one side of the first wiring frame 5-00 to form a terminal cover arc extinguishing grid part, and the terminal cover arc extinguishing grid part is provided with a plurality of exhaust holes 4-04.

[0091] Preferably, Figure 21 and 22As shown, the first terminal cavity includes a first upper terminal cavity 101b arranged on the cover 10a and a first lower terminal cavity 101a arranged on the base 11a, and the inner end side walls of the first lower terminal cavity 101a are each provided with a first lower limit groove 102a, and the inner end of the first upper terminal cavity 101b is provided with a first upper limit groove 102b with a U-shaped structure, and the two side edges of the lower end of the first terminal cover limiting side wall 4-03 are respectively limited and matched with the two first lower limit grooves 102a, and the two side edges and top edge of the upper end of the first terminal cover limiting side wall 4-03 are respectively limited and matched with the first upper limit groove 102b.

[0092] Preferably, Figure 15-17 As shown, the first terminal cover 4-0 further includes an arc isolation plate 4-06, which is arranged on a side of the terminal cover arc extinguishing grid portion away from the arc extinguishing chamber 1-0. Figure 15-17 As shown, the first terminal cover 4-0 also includes a first terminal cover top wall 4-02, which is arranged on the upper side of the top wall of the first wiring frame 5-00, and an arc isolation plate limiting groove 4-05 is provided at the connection between the first terminal cover top wall 4-02 and the first terminal cover limiting side wall 4-03, and one end of the arc isolation plate 4-06 is inserted into the arc isolation plate limiting groove 4-05.

[0093] Preferably, Figure 15 As shown, the arc extinguishing chamber 1-0 includes multiple arc extinguishing grids arranged side by side, one end of the first connecting plate 5-03 is inserted into the first wiring frame 5-00, and the other end passes through the middle of the arc extinguishing chamber 1-0 and is connected to the internal circuit of the pole chamber, dividing the multiple arc extinguishing grids into two parts.

[0094] Preferably, the first terminal 5-0 further comprises a first wiring screw 5-01, which is threadedly connected to the top wall of the first wiring frame 5-00, and the first terminal cover top wall 4-02 of the first terminal cover 4-0 is provided with a first terminal cover avoidance groove 4-020 for avoiding the first wiring screw 5-01.

[0095] Specifically, such as Figure 14-15 As shown, the upper and lower ends of the first terminal cover limiting side wall 4-03 are respectively limited and matched with the cover 10a and the base 11a. The part of the first terminal cover limiting side wall 4-03 protruding on the upper side of the first terminal 5-00 is the terminal cover arc extinguishing grid; the right end of the first wiring frame 5-00 is the first wiring frame internal port; the left end of the first connecting plate 5-03 is inserted into the first wiring frame 5-00, and is overlapped with the bottom wall of the first wiring frame 5-00, and the right end passes through the middle of the arc extinguishing chamber 1-0 and is connected to the internal circuit of the pole chamber. The multiple arc extinguishing grids of the arc extinguishing chamber 1-0 are arranged side by side in sequence from top to bottom. Figure 21 and 22As shown, the lower end of the first lower half terminal cavity 101a is its inner end (the end close to the middle of the pole chamber), and the lower end of the first upper half terminal cavity 101b is its inner end (the end close to the middle of the pole chamber).

[0096] Preferably, Figure 18-22 As shown, the second terminal cover 4-1 includes two second terminal cover isolating side walls 4-11 arranged opposite to each other and a second terminal cover limiting side wall 4-13. The two first terminal cover isolating side walls 4-11 are arranged on both sides of the second wiring frame 5-10. The second terminal cover limiting side wall 4-13 is respectively connected to the two second terminal cover isolating side walls 4-11 and is arranged on one side of the second wiring frame inner port of the second wiring frame 5-10. The two ends are respectively limited and matched with the cover 10a and the base 11a. One end of the second terminal cover limiting side wall 4-13 that is limited and matched with the base 11a is against the second connecting plate 5-13, and the other end of the second terminal cover limiting side wall 4-13 is arranged close to the top wall of the second wiring frame 5-10. Further, as Figure 21 and 22 As shown, the second terminal cavity includes a second lower terminal cavity 103a provided on the base 11a and a second upper terminal cavity 103b provided on the cover 10a. The inner end side walls of the second lower terminal cavity 103a are each provided with a second lower limiting groove 104a. The inner end of the second upper terminal cavity 103b is provided with a second upper isolation wall 104b. The two side edges of the lower end of the second terminal cover limiting side wall 4-13 are respectively limited and matched with the two second lower limiting grooves 104a. The top side edge of the second terminal cover limiting side wall 4-13 is against the second upper isolation wall 104b. Further, as Figure 18 As shown, the second terminal 5-1 also includes a second wiring screw 5-11, which is threadedly connected to the second wiring frame 5-10; the second terminal cover 4-1 also includes a second terminal cover top wall 4-12, which is arranged on the upper side of the top wall of the second wiring frame 5-10, and the second terminal cover top wall 4-12 is provided with a second terminal cover avoidance groove 4-120 for avoiding the second wiring screw 5-11.

[0097] like Figure 16 and 17 FIG. 1 shows an embodiment of the first terminal cover 4 - 0 .

[0098] like Figure 16 and 17As shown, the first terminal cover 4-0 includes two oppositely arranged first terminal cover isolation side walls 4-01, a first terminal cover limiting side wall 4-03 and a first terminal cover top wall 4-02; the first terminal cover top wall 4-02 and the two first terminal cover isolation side walls 4-01 form a U-shaped structure as a whole, the first terminal cover limiting side wall 4-03 is arranged on the same side of the first terminal cover isolation side wall 4-01 and the first terminal cover limiting side wall 4-03 and is respectively connected to the three, forming a first terminal cover cavity 4-00 for accommodating the first wiring frame 5-00, one end of the first terminal cover limiting side wall 4-03 protrudes from the side of the first terminal cover top wall 4-02 to form a terminal cover arc extinguishing grid part, and a plurality of exhaust holes 4-04 are provided on the terminal cover arc extinguishing grid part, the other end of the first terminal cover limiting side wall 4-03 protrudes from the side of the first terminal cover isolation side wall 4-01, and a first terminal cover avoidance groove 4-020 is provided in the middle of the first terminal cover top wall 4-02.

[0099] Preferably, Figure 16 and 17 As shown, the width of the portion of the first terminal cover limiting side wall 4-03 that cooperates with the base 11a is greater than the width of the portion of the first terminal cover limiting side wall 4-03 that cooperates with the cover 10a.

[0100] Preferably, Figure 15 As shown, the first terminal cover 4-0 also includes an arc isolation plate 4-06, which is arranged on the side of the terminal cover arc extinguishing grid away from the arc extinguishing chamber 1-0 to block the exhaust hole 4-04; an arc isolation plate limiting groove 4-05 is provided at the connection between the first terminal cover top wall 4-02 and the first terminal cover limiting side wall 4-03, and one end of the arc isolation plate 4-06 is inserted into the arc isolation plate limiting groove 4-05.

[0101] like Figure 18 and 19 FIG. 1 shows an embodiment of the second terminal cover 4 - 1 .

[0102] like Figure 18 and 19As shown, the second terminal cover 4-1 includes two oppositely arranged second terminal cover isolation side walls 4-11, a second terminal cover limiting side wall 4-13 and a second terminal cover top wall 4-12; the second terminal cover top wall 4-12 and the two second terminal cover isolation side walls 4-11 form a U-shaped structure as a whole, the second terminal cover limiting side wall 4-13 is arranged on the same side of the second terminal cover isolation side wall 4-11 and the second terminal cover limiting side wall 4-13 and is respectively connected to the three to form a second terminal cavity 4-10 for accommodating the second wiring frame 5-10, one end of the second terminal cover limiting side wall 4-13 is connected to the second terminal cover top wall 4-12 and is arranged close to the top wall of the second wiring frame 5-10, and the other end of the second terminal cover limiting side wall 4-13 protrudes on the side of the second terminal cover isolation side wall 4-11, and a second terminal cover avoidance groove 4-120 is provided in the middle of the second terminal cover top wall 4-02.

[0103] Preferably, Figure 19 and 20 As shown, the width of the portion of the first terminal cover limiting side wall 4 - 13 that cooperates with the base 11 a is greater than the width of the remaining portion of the first terminal cover limiting side wall 4 - 13 .

[0104] like Figure 21 and 22 FIG. 1 shows an embodiment of the main body shell 1 a.

[0105] like Figure 21 and 22As shown, the main body shell 1a is composed of a base 11a and a cover 10a joined together, and three pole chambers are arranged side by side in the middle of the main body shell 1a, each pole chamber is composed of a lower pole chamber arranged on the base 11a and an upper pole chamber arranged on the cover 10a, and pole chamber side walls are provided between adjacent pole chambers, and the pole chamber side walls are composed of a lower pole chamber side wall arranged on the base 11a and an upper pole chamber side wall arranged on the cover 10a, and the joint between the two forms a shell seam; each of the pole chambers includes a first terminal cavity and a second terminal cavity arranged at both ends thereof, and an arc extinguishing chamber cavity arranged in the middle of the pole chamber, and the arc extinguishing chamber cavity is arranged close to the first terminal cavity and is connected with it; the first terminal cavity includes a first lower terminal cavity 101a arranged on the base 11a and a first upper terminal cavity 101b arranged on the cover 10a; the first The two terminal cavities include a second lower half terminal cavity 102a arranged on the base 11a and a second upper half terminal cavity 103b arranged on the cover 10a; the arc extinguishing chamber cavity includes a lower half arc extinguishing chamber cavity 100a arranged on the base 11a and an upper half arc extinguishing chamber cavity 100b arranged on the cover 10a; a first lower limit groove 102a is provided on each side wall of the connection between the first lower half terminal cavity 101a and the lower half arc extinguishing chamber cavity 100a, and a first upper limit groove 102b of a U-shaped structure is provided at the connection between the first upper half terminal cavity 101b and the upper half arc extinguishing chamber cavity 100b; a second lower limit groove 104a is provided on each side wall of the second lower half terminal cavity 103a close to one end of the lower half arc extinguishing chamber cavity 100a, and a second upper isolation wall 104b is provided on one end of the second upper half terminal cavity 103b close to the upper half arc extinguishing chamber cavity 100b.

[0106] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A molded case circuit breaker, comprising a circuit breaker body (1), an electric operating device (2) and a locking device (6); the circuit breaker body (1) comprises an operating mechanism (3), the operating mechanism (3) comprises a handle (30); the electric operating device (2) comprises a slider (26-0) driven by the handle (30), the slider (26-0) sliding back and forth drives the handle (30) to swing, thereby closing / opening the molded case circuit breaker; characterized in that: The locking device (6) includes a rotatably arranged locking member (63); when the molded case circuit breaker is in an open state, the slider (26-0) is located in the open position, and the operating locking member (63) is rotated to engage with the slider (26-0) in a limited position, thereby preventing the slider (26-0) from sliding.

2. The molded case circuit breaker according to claim 1, characterized in that: When the molded case circuit breaker is in a closed state, the slider (26-0) is located at the closed position, and the slider (26-0) is limitedly engaged with the locking member (63) to prevent the locking member (63) from rotating.

3. The molded case circuit breaker according to claim 1 or 2, characterized in that: The locking member (63) includes a locking boss (631), and the locking boss (631) includes a locking boss surface (6310); When the molded case circuit breaker is in an open state, the locking member (63) rotates so that the locking boss (6310) is perpendicular to the sliding direction of the slider (26-0) and is limitedly engaged with the slider (26-0), thereby preventing the slider (26-0) from sliding; when the molded case circuit breaker is in a closed state, the locking boss (6310) is parallel to the sliding direction of the slider (26-0), and the slider (26-0) and the locking boss (6310) are limitedly engaged, thereby preventing the locking member (63) from rotating.

4. The molded case circuit breaker according to claim 3, characterized in that: The slider (26-0) includes a slider locking structure (26-03), and the slider locking structure (26-03) includes a first limiting side surface (26-030) and a first locking side surface (26-031) that are perpendicular to each other. The first limiting side surface (26-030) and the locking boss surface (6310) are in a limiting cooperation with each other to prevent the locking member (63) from rotating. The locking boss surface (6310) and the first locking side surface (26-031) are in a limiting cooperation with each other to prevent the slider (26-0) from sliding.

5. The molded case circuit breaker according to claim 1, characterized in that: The electric operating device (2) further comprises a transmission main shaft (25-0), a turntable (25-5) mounted on the transmission main shaft (25-0) and rotating coaxially therewith, and a cam (25-6) mounted on the turntable (25-5); the slider (26-0) comprises a slider driven groove (26-00) and a slider driving groove (26-01); the cam (25-6) drives and cooperates with the slider driven groove (26-00) to drive the slider (26-0) to slide back and forth; the handle (30) is inserted into the slider driving groove (26-01) and drives and cooperates with it.

6. The molded case circuit breaker according to claim 5, characterized in that: The electric operating device (2) further comprises an indicator disk (25-1) mounted on the transmission main shaft (25-0) and coaxially linked therewith; the molded case circuit breaker further comprises a switching push rod (24-0) which is slidably arranged and capable of shielding and avoiding the transmission main shaft (25-0).

7. The molded case circuit breaker according to claim 6, characterized in that: The molded case circuit breaker further comprises a first microswitch (22-1), a second microswitch (22-2), a third microswitch (22-3) and a fourth microswitch (22-4), which are respectively a travel microswitch, a manual-automatic switching microswitch, a locking microswitch and a reset microswitch; the first microswitch (22-1) is driven in conjunction with the indicator disk (25-1), the second microswitch (22-2) is driven in conjunction with the switching push rod (24-0), the third microswitch (22-3) is driven in conjunction with the locking device (6), and the fourth microswitch (22-4) is driven in conjunction with the slider (26-0).

8. The molded case circuit breaker according to claim 7, characterized in that: The locking member (63) further includes a locking member driving protrusion (632), and the locking device (6) is driven and matched with the third micro switch (22-3) through the locking member driving protrusion (632); the locking member (63) includes a locking member body (630) with a cylindrical structure, and the locking member driving protrusion (632) and the locking boss (631) are arranged at the radial ends of the locking member body (630) and are located at the axial ends of the locking member body (630).

9. The molded case circuit breaker according to claim 1 or 7, characterized in that: The electric operating device (2) comprises a slider bracket, the slider (26-0) is arranged in the middle of the slider bracket, and the slider bracket comprises an upper bracket (20-3) and a lower bracket (20-2) arranged opposite to each other; The upper bracket (20-3) comprises an upper bracket main board (20-30), and an upper bracket first arm (20-31) and an upper bracket second arm (20-32) respectively connected to two ends of the upper bracket main board (20-30) by bending, and an upper bracket limiting platform (20-33) is provided at the free ends of the upper bracket first arm (20-31) and the upper bracket second arm (20-32); The lower bracket (20-2) comprises a lower bracket main board (20-20), and a lower bracket first arm (20-21) and a lower bracket second arm (20-22) respectively arranged at both ends of the lower bracket main board (20-20) and connected to the lower bracket main board (20-20) by bending. Lower bracket limiting holes (20-23) are provided at the connection between the lower bracket main board (20-20) and the lower bracket first arm (20-21), and at the connection between the lower bracket main board (20-20) and the lower bracket second arm (20-22). The upper bracket main board (20-30) is opposite to the lower bracket main board (20-20); the upper bracket first arm (20-31) and the lower bracket first arm (20-21) are stacked together to form a first side wall of the bracket; the upper bracket second arm (20-32) and the lower bracket second arm (20-22) are stacked together to form a second side wall of the bracket; the upper bracket first arm (20-31) and the upper bracket second arm (20-32) are located between the lower bracket first arm (20-21) and the lower bracket second arm (20-22); and each upper bracket limiting platform (20-33) is inserted into a lower bracket limiting hole (20-23).

10. The molded case circuit breaker according to claim 9, characterized in that: The electric operating device (2) further comprises a slide rail (26-1) for limiting and guiding the slider (26-0); the slide rail (26-1) is arranged in the middle of the slider bracket, and its two ends are respectively fixedly connected to the first side wall of the bracket and the second side wall of the bracket.

11. The molded case circuit breaker according to claim 9, characterized in that: The slider bracket further includes a bracket avoidance hole (20-4) provided on a first side wall of the bracket. When the molded case circuit breaker is in an open state, the free end of the slider locking structure (26-03) of the slider (26-0) is inserted into the bracket avoidance hole (20-4).

12. The molded case circuit breaker according to claim 7, characterized in that: The electric operating device (2) further comprises a device bracket (20-1) and a slider bracket, wherein the device bracket (20-1), the slider bracket and the circuit breaker body (1) are arranged in sequence and connected in sequence; the slider (26-0) is arranged in the slider bracket; the transmission main shaft (25-0) of the electric operating device (2) is arranged in the middle of the device bracket (20-1); the switching push rod (24-0) is slidably arranged on the device bracket (20-1) and is located above the transmission main shaft (25-0); the locking device (6) is rotationally connected to the device bracket (20-1); the first micro switch (22-1), the second micro switch (22-2) and the third micro switch (22-3) are arranged on one side of the device bracket (20-1); the fourth micro switch (22-4) is arranged on the other side of the device bracket (20-1); and the fourth micro switch (22-4) and the slider bracket are located on the same side of the device bracket (20-1).

13. The molded case circuit breaker according to claim 1, wherein: The locking device (6) comprises a lock core (60), a washer (61), a positioning piece (62) and a locking piece (63); the device bracket (20-1) of the electric operating device (2) further comprises a locking device mounting hole, the positioning piece (62) is inserted into the locking device mounting hole, one end of the locking device (6) is the socket end of the lock core (60), protruding on one side of the device bracket (20-1), and an annular platform is provided on the outer side of the end, the annular platform and the washer (61) are respectively located on both sides of the device bracket (20-1) and are respectively limited and matched with the device bracket (20-1), and the locking piece (63) is arranged at the other end of the locking device (6) and is linked to the lock core (60).

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