Plug-in wiring terminal of drawer type circuit breaker

Abstract

The utility model discloses a plug-in wiring terminal of a drawer type circuit breaker. The plug-in wiring terminal comprises a static wiring terminal and a movable wiring terminal, the static wiring terminal comprises a static support and a plurality of sockets, each socket comprises a socket shell, the movable wiring terminal comprises a movable support and a plurality of plugs, and each plug comprises a plug shell; the static support is provided with a first installation cavity used for installing the socket, the rear end of the socket shell is provided with a plurality of first lock rods, the static support is provided with a plurality of first lock holes matched with the first lock rods, and the movement direction of the first lock rods inserted into the first lock holes is the same as the direction of the socket installed in the first installation cavity. The movable support is provided with a second installation cavity used for installing the plug, the rear end of the plug shell is provided with a plurality of second lock rods, the movable support is provided with second lock holes matched with the second lock rods, and the moving direction of the second lock rods inserted into the second lock holes is the same as the direction of the plug installed into the second installation cavity. The utility model has the advantages of stable and reliable structure, convenience in disassembly and assembly, flexibility in assembly and longer service life.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to the plug-in terminal block of a fixed drawer-type circuit breaker. Background Technology

[0002] Circuit breakers are used to connect internal circuits and external power supply circuits within a certain range, functioning similarly to a main switch. For ease of maintenance and repair, drawer-type circuit breakers are commonly used. A drawer-type circuit breaker generally consists of two parts: a fixed base frame with wiring connected to the main circuit, and the drawer-shaped circuit breaker body with wiring connected to the external circuit. To connect the main circuit and the external circuit, a typical drawer-type circuit breaker includes moving terminals and stationary terminals. The moving terminals are mounted on the circuit breaker body and connected to the internal circuit, while the stationary terminals are mounted on the base frame and connected to the external circuit. The connection of the moving and stationary terminals completes the entire circuit connection.

[0003] Chinese utility model patent application number 201420837988.2 discloses a circuit breaker terminal block, which includes a stationary terminal block and a moving terminal block. In the stationary terminal block, the top of the socket housing has a socket latch, and the bottom has a socket hook. The socket housing has limiting ribs for fixing it between two adjacent empty ribs of the mounting bracket. The top is fixed to the bracket by the socket latch, and the bottom is fixed to the bracket by the socket hook. The moving terminal block is installed in the same way; both are assembled using a snap-fit ​​connection. In the stationary terminal block, the socket hook of this snap-fit ​​structure is located at the bottom of the socket housing. During the installation of the socket housing on the mounting bracket, the socket hook is first subjected to an upward pressing force from the mounting bracket, and the two will generate pressing friction until the socket hook engages with the bracket latch. During disassembly, the socket hook is also subjected to an upward pressing force from the mounting bracket. Because the socket hook is long and narrow, it is prone to permanent deformation and damage during installation due to impact between the front end and the mounting bracket, or permanent deformation due to vertical force after repeated use. This results in a shorter service life for the static terminal block, and the dynamic terminal block structure also suffers from the same problem.

[0004] Therefore, it is essential to improve the structure to make the terminal block structure more reliable and extend its service life. Utility Model Content

[0005] The purpose of this utility model is to provide a plug-in terminal block for a drawer-type circuit breaker. This utility model has a stable and reliable structure, is very convenient to disassemble and assemble, and has the advantages of flexible assembly and longer service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drawer-type circuit breaker with plug-in terminals, including stationary terminals and moving terminals, which are plugged into each other; the stationary terminal includes a stationary support and multiple sockets arranged side-by-side on the stationary support, each socket including a socket housing and a first conductive element disposed on the socket housing; the moving terminal includes a moving support and multiple plugs arranged side-by-side on the moving support, each plug including a plug housing and a second conductive element disposed on the plug housing; and the socket housing and plug housing are respectively provided with a pin portion and a slot portion; when the stationary terminal and the moving terminal are engaged, the pin portion is inserted... Within the corresponding slot, the first conductive element and the second conductive element abut against each other to form electrical conductivity; the stationary bracket is provided with a first mounting cavity for mounting the socket, the rear end of the socket housing is provided with multiple first locking rods, the stationary bracket is provided with multiple first locking holes that engage with the first locking rods, and the direction of movement of the first locking rods into the first locking holes is the same as the direction of the socket being inserted into the first mounting cavity; the movable bracket is provided with a second mounting cavity for mounting the plug, the rear end of the plug housing is provided with multiple second locking rods, the movable bracket is provided with second locking holes that engage with the second locking rods, and the direction of movement of the second locking rods into the second locking holes is the same as the direction of the plug being inserted into the second mounting cavity.

[0007] By adopting the above technical solution, the sockets on the static terminal blocks only require inserting the locking rod on the socket housing into the corresponding lock hole on the static bracket during installation. This single insertion step makes installation extremely easy. Furthermore, the axial sliding engagement between the locking rod and the lock hole achieves locking, resulting in a more rational structure. The locking rod is less prone to permanent deformation or breakage, making the structure more reliable and extending its service life. It is worth mentioning that, in addition to its ease of installation, each socket is individually fixed to the static bracket via a snap-fit ​​connection (locking rod and lock hole engagement). Socket units can be evenly and neatly arranged on the static bracket as needed, without interfering with each other, ensuring a stable and reliable structure. The same socket can be used with static brackets of different shapes and structures, meeting the requirements of different customers regarding the number of sockets and the structure of the static bracket, offering the advantage of flexible assembly. The installation structure of the moving terminal blocks is similar to that of the static terminal blocks.

[0008] The present invention is further configured such that the first locking rod includes a first rod body portion and at least one first barb portion disposed at the end of the first rod body portion, and the first locking hole is provided with a first limiting step that forms a limiting cooperation with the first barb portion; the second locking rod includes a second rod body portion and at least one second barb portion disposed at the end of the second rod body portion, and the second locking hole is provided with a second limiting step that forms a limiting cooperation with the second barb portion.

[0009] By adopting the above technical solution, the first locking rod consists of a first rod body and a first barb. When the first barb on the first locking rod hooks onto the first limiting step, it prevents the first locking rod from disengaging from the first locking hole, thereby achieving the locking installation of the socket. When a force is applied to the first barb to deform it and disengage it from the first limiting step, the corresponding socket can be separated from the static bracket. The structure is simple and reliable, and disassembly and assembly are very convenient. The disassembly and assembly of the plug and the moving bracket are done in the same way.

[0010] The present invention is further configured such that the number of the first barb portions is two, and a first clearance groove is provided between the two first barb portions; the number of the second barb portions is two, and a second clearance groove is provided between the two second barb portions.

[0011] By adopting the above technical solution, two first barb parts (second barb parts) are used in conjunction with the first limiting step (second limiting step), which ensures stable force, good reliability of the locking structure, and convenient processing. Two first barb parts (second barb parts) can be formed simply by opening a slot (i.e., a clearance slot) at the end of the first locking rod (second locking rod).

[0012] The present invention is further configured such that the outer diameter of the first rod body is equivalent to the inner diameter of the first lock hole, and the outer diameter of the second rod body is equivalent to the inner diameter of the second lock hole.

[0013] By adopting the above technical solution, after the socket and plug are installed on the static bracket and the dynamic bracket respectively, radial runout of the first locking rod and the second locking rod can be avoided, thus ensuring the stability of the socket and plug installation structure.

[0014] The present invention is further configured such that a top plate is integrally provided on the top of the static bracket, and a first limiting groove and a second limiting groove are respectively provided at the upper and lower ends of the socket housing, and a first limiting protrusion and a second limiting protrusion that fit into the first limiting groove and the second limiting groove are respectively provided at the bottom of the first mounting cavity of the static bracket and the bottom of the top plate.

[0015] By adopting the above technical solution, the top plate supports the upper part of the socket to improve the stability of the socket installation. At the same time, the limiting structure restricts the socket shell to the static support. The limiting structure, together with the snap-fit ​​structure, stably and firmly positions the socket on the static support, resulting in higher structural reliability.

[0016] The present invention is further configured such that a support plate is provided at the position of the moving bracket corresponding to the inner end of the second mounting cavity, the support plate is provided close to the bottom of the plug housing, and the support plate is provided with a plurality of positioning protrusions, the extending direction of the positioning protrusions being the same as the extending direction of the second locking rod, and the bottom of the moving bracket is provided with positioning holes that match the corresponding positioning protrusions.

[0017] By adopting the above technical solution, the lower end of the plug is supported by the support plate to improve the stability of the plug installation. At the same time, the plug shell is restricted to the moving bracket by the limiting structure. The limiting structure, together with the snap-fit ​​structure, stably and firmly positions the plug on the moving bracket, resulting in higher structural reliability.

[0018] The present invention is further configured such that the side of the static support is provided with a support protrusion, and the side of the movable support is provided with a limiting rib that cooperates with the support protrusion. When the movable terminal and the static terminal are inserted into place, the bottom end of the limiting rib abuts against the upper end of the support protrusion.

[0019] By adopting the above technical solution, when the moving terminal and the stationary terminal are mated, the limiting rib and the supporting protrusion cooperate to play a role in limiting the stroke, thus ensuring the accuracy of the mating between the moving terminal and the stationary terminal and the stability of the mating structure.

[0020] The present invention is further configured such that a supporting inclined surface is provided at the upper rear side of the static bracket, and a movable inclined surface corresponding to the supporting inclined surface is provided on the plug housing. When the movable terminal and the static terminal are plugged into place, the movable inclined surface abuts against the supporting inclined surface.

[0021] By adopting the above technical solution, when the moving terminal and the stationary terminal are mated, the supporting slope on the stationary bracket provides limiting support to the moving slope on the plug housing. This not only increases the support surface for the moving terminal and improves the stability of the mating structure between the moving terminal and the stationary terminal, but also reduces the overall volume due to the slope mating method. Attached Figure Description

[0022] Figure 1 This is a perspective view of the entire utility model;

[0023] Figure 2 This is a cross-sectional view of the static terminal block of this utility model;

[0024] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0025] Figure 4 This is a cross-sectional view of the movable terminal block of this utility model;

[0026] Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle;

[0027] Figure 6 This is a schematic diagram of the installation structure of the socket of this utility model on the static bracket;

[0028] Figure 7This is a schematic diagram of the mounting structure of the pin on the moving bracket of this utility model.

[0029] In the diagram: 1. Stationary terminal block; 2. Moving terminal block; 3. Stationary bracket; 4. Socket; 5. Socket housing; 6. First conductive element; 7. Moving bracket; 8. Plug; 9. Plug housing; 10. Second conductive element; 11. First mounting cavity; 12. First locking rod; 13. First locking hole; 14. Second mounting cavity; 15. Second locking rod; 16. Second locking hole; 17. First rod body; 18. First barb; 19. First limiting step; 20. 21. Second rod body; 22. Second barb; 23. Second limiting step; 24. First clearance groove; 25. Second clearance groove; 26. Top plate; 27. First limiting groove; 28. Second limiting groove; 29. ​​First limiting protrusion; 30. Second limiting protrusion; 31. Support plate; 32. Positioning protrusion; 33. Positioning hole; 34. Support protrusion; 35. Limiting rib; 36. Supporting inclined surface; 37. Moving inclined surface; 38. Pin part; 39. Slot part. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example: As attached Figures 1-7The drawer-type circuit breaker shown has plug-in terminals, including a stationary terminal 1 and a moving terminal 2, which are plugged into each other. The stationary terminal 1 includes a stationary support 3 and multiple sockets 4 arranged side-by-side on the stationary support 3. Each socket 4 includes a socket housing 5 and a first conductive element 6 disposed on the socket housing 5. The moving terminal 2 includes a moving support 7 and multiple plugs 8 arranged side-by-side on the moving support 7. Each plug 8 includes a plug housing 9 and a second conductive element 10 disposed on the plug housing 9. The socket housing 5 and plug housing 9 are respectively provided with a pin portion 37 and a slot portion 38. When the stationary terminal 1 and the moving terminal 2 are engaged, the pin portion 37 is inserted into the corresponding slot portion 38, causing the first conductive element 6 to be plugged into the slot portion 38. Electrical component 6 and second conductive component 10 abut against each other to form electrical conduction; the static bracket 3 is provided with a first mounting cavity 11 for mounting socket 4, and the rear end of the socket housing 5 is integrally provided with a plurality of first locking rods 12, and the static bracket 3 is provided with a plurality of first locking holes 13 that are engaged with the first locking rods 12, and the direction of movement of the first locking rods 12 into the first locking holes 13 is the same as the direction of the socket 4 into the first mounting cavity 11; the movable bracket 7 is provided with a second mounting cavity 14 for mounting plug 8, and the rear end of the plug housing 9 is integrally provided with a plurality of second locking rods 15, and the movable bracket 7 is provided with a second locking hole 16 that is engaged with the second locking rods 15, and the direction of movement of the second locking rods 15 into the second locking holes 16 is the same as the direction of the plug 8 into the second mounting cavity 14. The socket 4 on the stationary terminal block 1 is installed by simply inserting the locking rod on the socket housing 5 into the corresponding lock hole on the stationary bracket 3. This single insertion step makes installation extremely easy. The locking rod and lock hole slide axially to achieve locking, resulting in a more rational structure. The locking rod is less prone to permanent deformation or breakage, making the structure more reliable and extending its service life. Notably, in addition to its ease of installation, each socket 4 is individually fixed to the stationary bracket 3 via a snap-fit ​​connection (locking rod and lock hole). Socket 4 units can be evenly and neatly arranged on the stationary bracket 3 as needed, without interfering with each other, ensuring a stable and reliable structure. The same socket 4 can be used with stationary brackets 3 of different shapes and structures, meeting the requirements of different customers regarding the number of sockets 4 and the structure of the stationary bracket 3, offering the advantage of flexible assembly. The installation structure of the moving terminal block 2 is similar to that of the stationary terminal block 1.

[0032] The structure and arrangement of the first conductive element 6 and the second conductive element 10 described above are conventional. For details, please refer to the conductive rods and springs mentioned in the terminal block of a circuit breaker disclosed in patent application number 201420837988.2. Therefore, the specific arrangement of the first conductive element 6 and the second conductive element 10 will not be described in detail here.

[0033] As attached Figures 2-5 As shown, the first locking rod 12 includes a first rod body 17 and at least one first barb portion 18 disposed at the end of the first rod body 17. The first locking hole 13 has a first limiting step 19 that forms a limiting engagement with the first barb portion 18. The second locking rod 15 includes a second rod body 20 and at least one second barb portion 21 disposed at the end of the second rod body 20. The second locking hole 16 has a second limiting step 22 that forms a limiting engagement with the second barb portion 21. The first locking rod 12 is composed of the first rod body 17 and the first barb portion 18. When the first barb portion 18 on the first locking rod 12 hooks the first limiting step 19, it prevents the first locking rod 12 from disengaging from the first locking hole 13, thereby achieving the locking installation of the socket 4. When a force is applied to the first barb portion 18, causing it to deform and disengage from the first limiting step 19, the corresponding socket 4 can be separated from the static bracket 3. The structure is simple and reliable, and disassembly and assembly are very convenient. The disassembly and assembly methods for the plug 8 and the moving bracket 7 are similar.

[0034] The aforementioned first limiting step 19 and second limiting step 22 can be manufactured by setting stepped holes.

[0035] As attached Figure 3 and attached Figure 5 As shown, there are two first barbs 18, and a first clearance groove 23 is provided between the two first barbs 18. There are two second barbs 21, and a second clearance groove 24 is provided between the two second barbs 21. The two first barbs 18 (second barbs 21) cooperate with the first limiting step 19 (second limiting step 22), resulting in stable force distribution, good locking structure reliability, and convenient processing. Only a slot (i.e., clearance groove) needs to be opened at the end of the first locking rod 12 (second locking rod 15) to form two first barbs 18 (second barbs 21). Alternatively, multiple first barbs 18 (second barbs 21) can be set by setting different clearance grooves, such as a cross-shaped groove, which can achieve the setting of four first barbs 18 (second barbs 21).

[0036] The outer diameter of the first rod portion 17 is equivalent to the inner diameter of the first locking hole 13, and the outer diameter of the second rod portion 20 is equivalent to the inner diameter of the second locking hole 16. After the socket 4 and plug 8 are respectively installed on the static bracket 3 and the moving bracket 7, radial runout of the first locking rod 12 and the second locking rod 15 can be avoided, ensuring the stability of the socket 4 and plug 8 installation structure.

[0037] As attached Figure 2 and attached Figure 6As shown, the top of the static bracket 3 is integrally provided with a top plate 25. The upper and lower ends of the socket housing 5 are respectively provided with a first limiting groove 26 and a second limiting groove 27. The bottom of the first mounting cavity 11 of the static bracket 3 and the bottom of the top plate 25 are respectively provided with a first limiting protrusion 28 and a second limiting protrusion 29 that fit with the first limiting groove 26 and the second limiting groove 27. The first limiting groove 26 extends inward from the inlet of the first mounting cavity 11, and the second limiting groove 27 extends inward from the inlet of the second mounting cavity 14. The top plate 25 supports the upper end of the socket 4 to improve the stability of the socket 4 installation. At the same time, the limiting structure restricts the socket housing 5 of the socket 4 to the static bracket 3. The limiting structure, together with the snap-fit ​​structure, stably and firmly positions the socket 4 on the static bracket 3, resulting in higher structural reliability.

[0038] As attached Figure 4 and attached Figure 7 As shown, the movable bracket 7 is integrally provided with a support plate 30 at the position corresponding to the inner end of the second mounting cavity 14. The support plate 30 is set close to the bottom of the plug housing 9, and the support plate 30 is provided with multiple positioning protrusions 31. The extending direction of the positioning protrusions 31 is the same as the extending direction of the second locking rod 15. The bottom of the movable bracket 7 is provided with positioning holes 32 that match the corresponding positioning protrusions 31. The support plate 30 supports the lower end of the plug 8 to improve the stability of the plug 8 installation. At the same time, the limiting structure restricts the plug housing 9 of the plug 8 to the movable bracket 7. The limiting structure, together with the snap-fit ​​structure, stably and firmly positions the plug 8 on the movable bracket 7, resulting in higher structural reliability.

[0039] As attached Figure 1 As shown, the stationary support 3 has a supporting protrusion 33 on its side, and the moving support 7 has a limiting rib 34 on its side that cooperates with the supporting protrusion 33. When the moving terminal 2 and the stationary terminal 1 are inserted into place, the bottom end of the limiting rib 34 abuts against the upper end of the supporting protrusion 33. When the moving terminal 2 and the stationary terminal 1 are engaged, the limiting rib 34 and the supporting protrusion 33 cooperate to limit the stroke, ensuring the accuracy of the engagement between the moving terminal 2 and the stationary terminal 1 and the stability of the engagement structure.

[0040] As attached Figure 2 and attached Figure 4As shown, the upper rear end of the static bracket 3 is also provided with a supporting inclined surface 35, and the plug housing 9 is provided with a movable inclined surface 36 corresponding to the supporting inclined surface 35. When the movable terminal 2 and the static terminal 1 are inserted into place, the movable inclined surface 36 abuts against the supporting inclined surface 35. When the movable terminal 2 and the static terminal 1 are engaged, the supporting inclined surface 35 on the static bracket 3 provides limiting support to the movable inclined surface 36 on the plug housing 9, which not only increases the support surface of the movable terminal 2 and improves the stability of the engagement structure between the movable terminal 2 and the static terminal 1, but also reduces the overall volume due to the inclined surface engagement method.

Claims

1. A drawer-type circuit breaker with plug-in terminals, comprising a stationary terminal (1) and a moving terminal (2), wherein the stationary terminal (1) and the moving terminal (2) are plugged into each other; the stationary terminal (1) comprises a stationary support (3) and a plurality of sockets (4) arranged side by side on the stationary support (3), the sockets (4) comprising a socket housing (5) and a first conductive element (6) disposed on the socket housing (5); the moving terminal (2) comprises a moving support (7) and a plurality of sockets (6) arranged side by side on the moving support (7). The device has multiple plugs (8), each plug (8) including a plug housing (9) and a second conductive element (10) disposed on the plug housing (9). The socket housing (5) and the plug housing (9) are respectively provided with a pin portion (37) and a slot portion (38). When the stationary terminal (1) and the moving terminal (2) are engaged, the pin portion (37) is inserted into the corresponding slot portion (38), causing the first conductive element (6) and the second conductive element (10) to abut against each other, thus forming an electrical connection. The device is characterized by: The static bracket (3) is provided with a first mounting cavity (11) for mounting a socket (4). The rear end of the socket housing (5) is provided with a plurality of first locking rods (12). The static bracket (3) is provided with a plurality of first locking holes (13) that engage with the first locking rods (12). The direction of movement of the first locking rods (12) when inserted into the first locking holes (13) is the same as the direction in which the socket (4) is inserted into the first mounting cavity (11). The moving bracket (7) is provided with a second mounting cavity (14) for mounting a plug (8). The rear end of the plug housing (9) is provided with a plurality of second locking rods (15). The moving bracket (7) is provided with a second locking hole (16) that engages with the second locking rods (15). The direction of movement of the second locking rods (15) when inserted into the second locking hole (16) is the same as the direction in which the plug (8) is inserted into the second mounting cavity (14).

2. The plug-in terminal block of the drawer-type circuit breaker according to claim 1, characterized in that: The first locking bar (12) includes a first rod body (17) and at least one first barb portion (18) disposed at the end of the first rod body (17). The first locking hole (13) is provided with a first limiting step (19) that forms a limiting engagement with the first barb portion (18). The second locking bar (15) includes a second rod body (20) and at least one second barb portion (21) disposed at the end of the second rod body (20). The second locking hole (16) is provided with a second limiting step (22) that forms a limiting engagement with the second barb portion (21).

3. The plug-in terminal block of the drawer-type circuit breaker according to claim 2, characterized in that: There are two first barb portions (18), and a first clearance groove (23) is provided between the two first barb portions (18). There are two second barb portions (21), and a second clearance groove (24) is provided between the two second barb portions (21).

4. The plug-in terminal block of the drawer-type circuit breaker according to claim 2, characterized in that: The outer diameter of the first rod part (17) is equivalent to the inner diameter of the first lock hole (13), and the outer diameter of the second rod part (20) is equivalent to the inner diameter of the second lock hole (16).

5. The plug-in terminal block of the drawer-type circuit breaker according to any one of claims 1 to 4, characterized in that: The top of the static bracket (3) is integrally provided with a top plate (25), and the upper and lower ends of the socket housing (5) are respectively provided with a first limiting groove (26) and a second limiting groove (27). The bottom of the first mounting cavity (11) of the static bracket (3) and the bottom of the top plate (25) are respectively provided with a first limiting protrusion (28) and a second limiting protrusion (29) that fit with the first limiting groove (26) and the second limiting groove (27).

6. The plug-in terminal block of the drawer-type circuit breaker according to any one of claims 1 to 4, characterized in that: The movable bracket (7) is provided with a support plate (30) at the position of the inner end of the second mounting cavity (14). The support plate (30) is set close to the bottom of the plug housing (9), and the support plate (30) is provided with a plurality of positioning protrusions (31). The extension direction of the positioning protrusions (31) is the same as the extension direction of the second locking rod (15). The bottom of the movable bracket (7) is provided with positioning holes (32) that fit into the corresponding positioning protrusions (31).

7. The plug-in terminal block of the drawer-type circuit breaker according to claim 1, characterized in that: The static support (3) has a support protrusion (33) on its side, and the moving support (7) has a limiting rib (34) on its side that cooperates with the support protrusion (33). When the moving terminal (2) and the static terminal (1) are inserted into place, the bottom end of the limiting rib (34) abuts against the upper end of the support protrusion (33).

8. The plug-in terminal block of the drawer-type circuit breaker according to claim 7, characterized in that: The upper rear side of the static bracket (3) is also provided with a supporting inclined surface (35), and the plug housing (9) is provided with a moving inclined surface (36) corresponding to the supporting inclined surface (35). When the moving terminal (2) and the static terminal (1) are plugged in, the moving inclined surface (36) abuts against the supporting inclined surface (35).

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