Molded case circuit breaker with interlocking structure

Abstract

The utility model relates to a molded case circuit breaker with an interlocking structure, the molded case circuit breaker comprises a shell, two sides of the shell are respectively provided with a plug-in structure and a butt joint structure, the plug-in structure comprises a plug-in pin telescopically connected to one side of the shell, the plug-in pin is accommodated in the shell and extends outwards in a cone shape, and the plug-in pin can be plugged in an adjacent shell; the butt joint structure comprises abutting blocks arranged close to the outer side of the shell, the abutting blocks are arranged corresponding to the two sides of the inserting pin respectively and abut against the cone bottom face of the inserting pin, gaps are reserved in the left sides and the right sides of the abutting blocks, and the thickness of the inserting pin corresponds to the width of the gaps between the abutting blocks. A control structure is arranged on the side, corresponding to the inserting pin, of the shell, the control structure slides and extends to the outer surface of the shell, and the inserting pin is contained in the shell and abuts against the side, close to the shell, of the control structure. The device has the advantages that the circuit breakers can be mutually connected and mutually locked, the whole group of circuit breakers need to be disassembled when the circuit breakers are disassembled, and a single circuit breaker cannot be independently disassembled.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a molded case circuit breaker with an interlocking structure. Background Technology

[0002] A molded case circuit breaker is a low-voltage circuit protection device with overload, short circuit and undervoltage protection functions. It is an important electrical device for protecting circuit safety. Its arc-extinguishing chamber is a key component for the circuit breaker to complete the relevant breaking parameters. The arc-extinguishing chamber is usually composed of arc-extinguishing grids, side plates and gas generating components, which are used to limit the movement area of ​​the electric arc and extinguish the electric arc.

[0003] In the existing equipment installation process, a production line is usually equipped with multiple devices and multiple circuit breakers for control. These circuit breakers are not connected to each other. This can lead to the installation personnel of other devices adjusting the circuit breaker arrangement without authorization during the subsequent use of the electrical box, making it difficult to locate the circuit breakers. In response to the above-mentioned related technologies, the applicant proposes a circuit breaker that can be interconnected and locked to each other, so that the entire group must be removed when the circuit breaker is removed, and a single circuit breaker cannot be removed alone. Utility Model Content

[0004] In order to enable circuit breakers to be interconnected and interlocked, so that the entire group needs to be removed when the circuit breaker is removed, and a single circuit breaker cannot be removed alone, this application provides a molded case circuit breaker with an interlocking structure.

[0005] The molded case circuit breaker with an interlocking structure provided in this application adopts the following technical solution:

[0006] A molded case circuit breaker with an interlocking structure includes a housing. A plug-in structure and a mating structure are respectively provided on both sides of the housing. The plug-in structure includes a plug pin telescopically connected to one side of the housing. The plug pin is housed in the housing and extends outward in a conical shape, allowing it to be plugged into an adjacent housing. The mating structure includes abutment blocks disposed near the outer side of the housing. The abutment blocks are respectively disposed on both sides of the plug pin and abut against the bottom surface of the conical shape of the plug pin, with gaps left on the left and right sides of the abutment blocks. The thickness of the plug pin is set to correspond to the width of the gap between the abutment blocks. A control structure is provided on the side of the housing corresponding to the plug pin. The control structure slides and extends on the outer surface of the housing, and the plug pin is housed in the housing and abuts against the control structure near the housing.

[0007] By adopting the above technical solution, the interlocking design ensures that multiple circuit breakers can be firmly locked together when connected, avoiding individual disassembly. The conical shape of the plug pin, in conjunction with the control structure, provides a natural guiding effect when inserted into adjacent housings, making the alignment between the two housings more accurate, reducing the need for manual adjustment, simplifying the installation process, and improving assembly efficiency.

[0008] Preferably, the insertion structure further includes a receiving groove and an insertion spring. The receiving groove is formed on the side wall of the housing and extends laterally in a rectangular shape. The height of the receiving groove is set to correspond to the gap width between the abutment blocks. The upper and lower ends of the insertion pin are cut to correspond to the shape of the upper and lower ends of the receiving groove, and are received and slidably connected to the receiving groove. The cone of the insertion pin faces outward. One end of the insertion spring is received and fixed in the receiving groove, and the other end is fixed and drives the insertion pin to slide outward.

[0009] Preferably, the docking structure further includes a docking slot and a reset spring. The docking slot is tapered and located on the side of the housing opposite to the insertion pin. The insertion pin can be accommodated and rotatably connected to the docking slot. The abutment block slides laterally and passes through both sides of the docking slot near the outer side of the housing. The outer side of the abutment block is configured to correspond to the tapered shape of the insertion pin, and the inner side of the abutment block abuts against and corresponds to the bottom surface of the insertion pin. The reset spring is accommodated in the housing and drives the insertion pins to move closer to each other.

[0010] Preferably, the control structure includes a control board, a limiting bracket, and a limiting plate. One end of the control board is inserted into and slidably connected to the outer wall of the corresponding mating slot of the housing, and the other end extends along the sliding direction and passes through the outer side of the housing. The control board abuts against the cone of the insertion pin and can slide and be misaligned with the insertion pin. The limiting brackets are respectively fixed to the housing and accommodated between the housing and the control board. The limiting plates are respectively fixed to the side of the control board near the limiting bracket, and the limiting brackets extend in the opposite direction to the extension end of the control board and abut against the limiting bracket.

[0011] By adopting the above technical solution, this design allows users to precisely control the position of the connector pin through a simple sliding operation, ensuring that the connector pin can be smoothly inserted into or removed from the adjacent housing when needed. This external operation method not only simplifies the installation and disassembly process, but also improves the convenience of daily use, especially in confined spaces or high-density installation environments, where the operation is more flexible.

[0012] Preferably, the housing is provided with a stabilizing structure, which includes a stabilizing block, a stabilizing spring, and a stabilizing slot. The stabilizing block passes through the side wall of the housing corresponding to the insertion pin and abuts against the side wall of the control plate near the housing. The stabilizing spring fixes and drives the stabilizing block to slide outward. The stabilizing slot is circumferentially opened on the outer side wall of the housing along the center of the mating slot, and the stabilizing block passes through and is rotatably connected to the stabilizing slot.

[0013] By adopting the above technical solution, the stabilizing block and the plug pin can be controlled by the control board at the same time, making operation simple. The annular stabilizing slot, in conjunction with the rotation of the stabilizing block, provides flexibility while improving stability.

[0014] Preferably, the pin is located near the sliding connection between the control panel and the housing.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] The interlocking design ensures that multiple circuit breakers can be securely locked together when connected, preventing individual disassembly. The conical pin, in conjunction with the control structure, provides natural guidance when inserted into adjacent housings, making the alignment between the two housings more accurate, reducing the need for manual adjustment, simplifying the installation process, and improving assembly efficiency.

[0017] This design allows users to precisely control the position of the connector pins through a simple sliding operation, ensuring that the connector pins can be smoothly inserted into or removed from adjacent housings when needed. This external operation method not only simplifies the installation and disassembly process, but also improves the convenience of daily use, especially in confined spaces or high-density installation environments, where operation is more flexible.

[0018] The stabilizing block can be controlled by the control board simultaneously with the plug pin, making operation simple. The annular stabilizing slot, combined with the rotation of the stabilizing block, provides both flexibility and improved stability. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0020] Figure 2 This is a structural schematic diagram of an embodiment of this application;

[0021] Figure 3 This is a schematic diagram illustrating the docking structure in an embodiment of this application;

[0022] Figure 4 This is a cross-sectional view illustrating the plug-in structure of an embodiment of this application;

[0023] Figure 5 This is a cross-sectional view illustrating the docking structure of an embodiment of this application;

[0024] Figure 6 This is a cross-sectional view of the control panel in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Insertion structure; 21. Insertion pin; 22. Receiving groove; 23. Insertion spring; 3. Docking structure; 31. Abutment block; 32. Docking slot; 33. Reset spring; 4. Control structure; 41. Control board; 42. Limit bracket; 43. Limit plate; 5. Stabilizing structure; 51. Stabilizing block; 52. Stabilizing spring; 53. Stabilizing slot. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] This application discloses a molded case circuit breaker with an interlocking structure, referring to... Figure 1 , 2 It includes a housing 1, and the two sides of the housing 1 are respectively provided with a plug-in structure 2 and a docking structure 3 for mutual connection.

[0028] Reference Figure 3 , 4 The insertion structure 2 includes an insertion pin 21, a receiving groove 22, and an insertion spring 23. The receiving groove 22 is formed on the side wall of the housing 1 and extends laterally in a rectangular shape. The insertion pin 21 is conical with the cone head extending away from the side wall of the housing 1. The upper and lower ends of the insertion pin 21 are cut to correspond to the upper and lower ends of the receiving groove 22, and are received and slidably connected to the receiving groove 22. One end of the insertion spring 23 is received and fixed in the receiving groove 22, and the other end is fixed and drives the insertion pin 21 to slide outward.

[0029] Reference Figure 2 , 5 The docking structure 3 includes an abutment block 31, a docking slot 32, and a reset spring 33. The docking slot 32 is tapered and is located on the side of the housing 1 opposite to the insertion pin 21. The insertion pin 21 can be accommodated and rotatably connected to the docking slot 32. The abutment block 31 slides laterally and passes through the docking slot 32 on both sides near the outer side of the housing 1. The outer side of the abutment block 31 corresponds to the tapered shape of the insertion pin 21, and the inner side of the abutment block 31 abuts against and corresponds to the bottom surface of the insertion pin 21. There are gaps on the left and right sides of the abutment block 31, and the width of the gap between the abutment blocks 31 corresponds to the thickness of the insertion pin 21. The reset spring 33 is accommodated in the housing 1 and drives the insertion pins 21 to move closer to each other.

[0030] Reference Figure 4 , 6 The plug pin 21 is connected to the adjacent circuit breaker housing 1 by the control structure 4. The control structure 4 includes a control plate 41, a limit bracket 42 and a limit plate 43. One end of the control plate 41 is inserted into and slidably connected to the outer wall of the corresponding docking slot 32 of the housing 1, and the other end extends along the sliding direction and passes through the outside of the housing 1. The control plate 41 abuts against the cone head of the plug pin 21 and can slide and be misaligned with the plug pin 21. When the control plate 41 is pulled outward, the control plate 41 is misaligned with the plug pin 21, so that the plug pin 21 is dislodged from the housing 1 and inserted into the docking slot 32 of the adjacent housing 1. The plug pin 21 is located near the sliding connection between the control plate 41 and the housing 1, so that the control plate 41 provides a more stable limit for the plug pin 21.

[0031] Reference Figure 4 , 6The limiting brackets 42 are fixed to the housing 1 and housed between the housing 1 and the control plate 41. The limiting plates 43 are fixed to the side of the control plate 41 near the limiting brackets 42, and the limiting brackets 42 extend in the opposite direction to the extension end of the control plate 41 and abut against the limiting brackets 42, so that the control plate 41 can only slide outward when it is abutted by the housing of the adjacent circuit breaker, thus avoiding damage caused by forced insertion.

[0032] Reference Figure 1 , 3 The housing 1 is provided with a stabilizing structure 5 to stabilize the rotation unlocking process. The stabilizing structure 5 includes a stabilizing block 51, a stabilizing spring 52 and a stabilizing slot 53. The stabilizing block 51 passes through the side wall of the housing 1 corresponding to the insertion pin 21, and the stabilizing block 51 abuts against the side wall of the control plate 41 near the housing 1, so that the stabilizing block 51 is also controlled by the control plate 41. The stabilizing spring 52 fixes and drives the stabilizing block 51 to slide outward. The stabilizing slot 53 is circumferentially opened on the outer side wall of the housing 1 along the center of the docking slot 32, and the stabilizing block 51 passes through and is rotatably connected to the stabilizing slot 53.

[0033] The working process of this application is as follows: After fixing a circuit breaker screw to the transformer box, the second circuit breaker can be fixed to the side of the housing with the docking slot 32. At this time, the plug pin 21 and the stabilizing block 51 of the second circuit breaker are limited by the control board 41 and housed in the housing 1. The side wall of the circuit breaker is flat, which is no different from installing an ordinary circuit breaker.

[0034] Once the second circuit breaker screws are secured, pull the control plate 41 outwards. The control plate 41, the stabilizing block 51, and the plug pin 21 are misaligned. Under the influence of the spring's elastic potential energy, they disengage from the housing 1. The conical surface of the plug pin 21 pushes the two limiting blocks away from each other. After the plug pin 21 enters the docking slot 32, the reset spring 33 brings the abutting blocks 31 closer together, positioning the plug pin 21 inside the docking slot 32. This prevents the second circuit breaker from separating from the first circuit breaker in the direction perpendicular to the side wall of the housing 1, and also prevents it from separating from the first circuit breaker in the screw installation direction. At the same time, the stabilizing block 51 is housed in the stabilizing slot 53, preventing the second circuit breaker from providing a certain supporting force in the screw installation direction and preventing the plug pin 21 from breaking due to external force. This ensures that adjacent circuit breakers cannot be separated individually without being completely disassembled.

[0035] When you want to separate the first and second circuit breakers, remove both the first and second circuit breakers, rotate the second circuit breaker so that the plug pin 21 is aligned with the gap between the two abutment blocks 31, and the plug pin 21 can be dislodged, thus separating the two circuit breakers.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A molded case circuit breaker with an interlocking structure, comprising a housing (1), characterized in that: The shell (1) is provided with a plug-in structure (2) and a docking structure (3) on both sides. The plug-in structure (2) includes a plug pin (21) that is telescopically connected to one side of the shell (1). The plug pin (21) is housed in the shell (1) and extends outward in a cone shape. It can be plugged into an adjacent shell (1). The docking structure (3) includes abutting blocks (31) that are disposed near the outside of the shell (1). The abutting blocks (31) are respectively disposed on both sides of the plug pin (21) and abut against the bottom surface of the cone of the plug pin (21). There is a gap on the left and right sides of the abutting blocks (31). The thickness of the plug pin (21) is set to correspond to the gap width between the abutting blocks (31). The shell (1) is provided with a control structure (4) on the side corresponding to the plug pin (21). The control structure (4) slides and extends on the outer surface of the shell (1). The plug pin (21) is housed in the shell (1) and abuts against the side of the control structure (4) near the shell (1).

2. A molded case circuit breaker with an interlocking structure according to claim 1, characterized in that: The plug-in structure (2) also includes a receiving groove (22) and a plug-in spring (23). The receiving groove (22) is opened on the side wall of the housing (1) and extends laterally in a rectangular shape. The height of the receiving groove (22) is set to correspond to the gap width between the abutment blocks (31). The upper and lower ends of the plug-in pin (21) are cut to correspond to the shape of the upper and lower ends of the receiving groove (22), and are received and slidably connected to the receiving groove (22). The cone of the plug-in pin (21) faces outward. One end of the plug-in spring (23) is received and fixed in the receiving groove (22), and the other end is fixed and drives the plug-in pin (21) to slide outward.

3. A molded case circuit breaker with an interlocking structure according to claim 2, characterized in that: The docking structure (3) further includes a docking slot (32) and a reset spring (33). The docking slot (32) is tapered and is located on the side of the housing (1) opposite to the insertion pin (21). The insertion pin (21) can be accommodated and rotatably connected to the docking slot (32). The abutment block (31) slides laterally and passes through the docking slot (32) on both sides near the outer side of the housing (1). The outer side of the abutment block (31) corresponds to the tapered shape of the insertion pin (21), and the inner side of the abutment block (31) abuts against and corresponds to the bottom surface of the insertion pin (21). The reset spring (33) is accommodated in the housing (1) and drives the insertion pins (21) to move closer to each other.

4. A molded case circuit breaker with an interlocking structure according to claim 3, characterized in that: The control structure (4) includes a control plate (41), a limiting bracket (42), and a limiting plate (43). One end of the control plate (41) is inserted into and slidably connected to the outer wall of the corresponding docking slot (32) of the housing (1), and the other end extends along the sliding direction and passes through the outside of the housing (1). The control plate (41) abuts against the cone of the insertion pin (21) and can slide and be misaligned with the insertion pin (21). The limiting bracket (42) is fixed to the housing (1) and accommodated between the housing (1) and the control plate (41). The limiting plate (43) is fixed to the side of the control plate (41) near the limiting bracket (42), and the limiting bracket (42) extends in the opposite direction to the extension end of the control plate (41) and abuts against the limiting bracket (42).

5. A molded case circuit breaker with an interlocking structure according to claim 4, characterized in that: The housing (1) is provided with a stabilizing structure (5), which includes a stabilizing block (51), a stabilizing spring (52) and a stabilizing slot (53). The stabilizing block (51) passes through the side wall of the housing (1) corresponding to the insertion pin (21) and abuts against the side wall of the control plate (41) near the housing (1). The stabilizing spring (52) fixes and drives the stabilizing block (51) to slide outward. The stabilizing slot (53) is circumferentially opened on the outer side wall of the housing (1) along the center of the docking slot (32). The stabilizing block (51) passes through and is rotatably connected to the stabilizing slot (53).

6. A molded case circuit breaker with an interlocking structure according to claim 4, characterized in that: The pin (21) is located near the sliding connection between the control panel (41) and the housing (1).

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