A terminal for a fixed circuit breaker

Abstract

The utility model discloses a fixed circuit breaker's wiring terminal, including support and multiple wiring terminal units that are arranged side by side on the support, wiring terminal unit includes terminal casing, input electrically conductive part and output electrically conductive part, be equipped with installation cavity and import and export on the support, be equipped with at least one elastic barb on the terminal casing, the side of support away from import and export is provided with the insertion hole for the elastic barb insertion, the insertion hole inner wall is equipped with the limiting portion for the elastic barb constitutes the limiting cooperation and makes it unable to come loose out of the insertion hole when free state, the other side of insertion hole inner wall relative limiting portion and the elastic barb between are equipped with the accommodation gap, when the elastic barb is deformed to the accommodation gap under the action of external force, the elastic barb is separated from the limiting portion. The utility model discloses stable and reliable structure, good universality, same wiring terminal unit can cooperate the support of different structure, can satisfy different customer to wiring terminal unit quantity and the requirement of support structure, has the advantage that the assembly is nimble.

Description

Technical Field

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

[0002] When a circuit experiences dangerous faults such as short circuits, severe overloads, or undervoltage, a low-voltage circuit breaker can automatically disconnect the faulty circuit, effectively protecting the electrical equipment connected in series with it. Therefore, low-voltage circuit breakers are a very important protective electrical appliance in low-voltage distribution networks. Compared to drawer-type circuit breakers of the same model and current rating, fixed circuit breakers have the advantages of consistent technical performance indicators, smaller size, and lower price. Therefore, fixed circuit breakers are widely used.

[0003] Currently, the commonly used fixed-type circuit breaker terminals on the market include a bracket and multiple terminal units mounted on the bracket. These terminal units are arranged side-by-side on the bracket, and are fixed to the bracket by a screw that passes laterally through the bracket and the terminal units, with nuts tightening at both ends. However, in actual production, different customers have different requirements regarding the number of terminal units and the bracket's shape and structure. Using the traditional structure, the terminal units cannot flexibly adapt to different brackets, leading to issues such as inappropriate dimensions causing loose fits and wobbling between terminal units, or the need to manufacture screws of corresponding sizes to fit different brackets, increasing costs. Therefore, there is an urgent need in the market for a more versatile and flexible fixed-type circuit breaker terminal to meet the different customer requirements regarding the number of terminal units and bracket structure. Utility Model Content

[0004] The purpose of this utility model is to provide a wiring terminal for a fixed circuit breaker. This utility model has a stable and reliable structure, good versatility, and the same wiring terminal unit can be used with brackets of different structures to meet the requirements of different customers for the number of wiring terminal units and bracket structure. It has the advantage of flexible assembly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a terminal block for a fixed circuit breaker, comprising a bracket and multiple terminal block units arranged side-by-side on the bracket. Each terminal block unit includes a terminal housing and an input conductive element and an output conductive element disposed within the terminal housing. The input conductive element and the output conductive element are electrically connected. The bracket has a mounting cavity for accommodating the terminal block units. The side of the bracket has an inlet and outlet for inserting the terminal block units into the mounting cavity. The terminal housing of each terminal block unit has at least one elastic barb. The extension direction of the elastic barb is parallel to the direction in which the terminal block unit is inserted into the mounting cavity. The bracket has a socket hole for inserting the elastic barb on the side away from the inlet and outlet. The inner wall of the socket hole has a limiting part for limiting the elastic barb to prevent it from dislodging from the socket hole in a free state. A clearance gap is provided between the other side of the inner wall of the socket hole opposite to the limiting part and the elastic barb. When the elastic barb is deformed to the clearance gap by external force, the elastic barb disengages from the limiting part.

[0006] By adopting the above technical solution, each terminal block unit is individually installed on the bracket via a snap-fit ​​method. During installation, the elastic barb on the terminal housing of the terminal block unit is inserted into the socket of the bracket. The elastic barb hooks onto the limiting part inside the socket, thus limiting the elastic barb and preventing it from loosening out of the socket. For disassembly, simply apply force to the elastic barb, causing it to deform in the opposite direction of the clearance gap. After the elastic barb disengages from the limiting part, the locking of the limiting part on the elastic barb is released, and the terminal housing can be pulled outwards to separate the terminal block unit from the bracket. Disassembly and assembly are very convenient. Multiple terminal blocks can be evenly and neatly arranged on the bracket as needed, without interfering with each other, resulting in a stable and reliable structure. The same terminal block unit can be used with mounting brackets of different shapes and structures, meeting the requirements of different customers regarding the number of terminal blocks and bracket structure, offering the advantage of flexible assembly.

[0007] The present invention is further configured such that the number of elastic barbs provided on the side of the terminal housing that abuts against the inner side of the bracket mounting cavity is two, and the two elastic barbs are arranged in a vertical mirror image, and the limiting parts in the two sockets on the bracket corresponding to the same terminal housing are also arranged in a vertical mirror image.

[0008] By adopting the above technical solution, the symmetrical locking structure can ensure that the forces are evenly distributed in both directions. The symmetrical structure can evenly distribute the external impact force, avoiding deformation or breakage caused by the force on a single elastic barb. At the same time, the anti-loosening performance is improved, which can limit the upward or downward offset of the two elastic barbs under vibration conditions, thereby making the locking structure more stable and reliable.

[0009] The present invention is further provided that the end of the insertion hole near the mounting cavity is provided with an flared opening that is larger on the outside and smaller on the inside.

[0010] By adopting the above technical solution, the flared design of the socket makes it easier for the elastic barb on the terminal housing to be inserted into the socket during the assembly of the wiring terminals, making the assembly easier and more convenient.

[0011] The present invention is further provided that the end of the limiting part near the mounting cavity is provided with a guide slope.

[0012] By adopting the above technical solution, during the process of inserting the elastic barb into the socket, the guide slope of the limiting part gradually applies force to the elastic barb, causing the elastic barb to gradually deform until it passes the limiting part and abuts against the end of the limiting part away from the guide slope to form a limiting fit, which further facilitates the assembly operation of the wiring terminal.

[0013] The present invention is further configured such that the bottom of the terminal housing of the terminal unit is provided with a positioning boss, and the left and right sides of the positioning boss are respectively provided with an inner recess, and the two opposite inner recesses on each of the two adjacent terminal housings form a positioning groove, and the bottom of the bracket is provided with a plurality of positioning protrusions for inserting into the corresponding positioning grooves.

[0014] By adopting the above technical solution, the terminal housing of the terminal block unit is restricted to the bracket by the positioning structure. This positioning structure, together with the snap-fit ​​structure, locks and positions the terminal block unit at multiple points, making the structure more reliable.

[0015] The present invention is further configured such that the terminal housing of the terminal unit is provided with a protrusion at the upper end, the bracket is provided with a limiting baffle at the upper end of the mounting cavity for abutting against the front side of the protrusion, the elastic barb is provided on the front side of the terminal housing and the front side of the protrusion, and the insertion hole and the limiting part are provided on the front side of the bracket and the front side of the limiting baffle respectively.

[0016] By adopting the above technical solution, the terminal block unit is further limited and supported by the limiting baffle, and the limiting baffle is connected to the upper end of the terminal block unit by the elastic barb snap-fit ​​method, thereby further improving the stability of the terminal block unit installation.

[0017] The present invention is further provided in that a mounting plate is provided on each side of the bracket, the mounting plate is provided with mounting holes for fasteners to pass through, and a reinforcing rib is provided between the mounting plate and the bracket.

[0018] By adopting the above technical solution, it is easy to fix the wiring terminals on the mounting surface. At the same time, the reinforcing ribs between the mounting plate and the bracket effectively improve the strength of the overall installation structure. Attached Figure Description

[0019] Figure 1 This is a perspective view of the entire utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the bracket of this utility model;

[0021] Figure 3 This is a schematic diagram of the terminal block unit of this utility model;

[0022] Figure 4 A schematic diagram of the structure of this utility model showing multiple terminal block units arranged side by side;

[0023] Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle;

[0024] Figure 6 This is a cross-sectional view of the entire utility model;

[0025] Figure 7 for Figure 6 Enlarged structural diagram of section B in the middle;

[0026] Figure 8 for Figure 6 Enlarged structural diagram of section C;

[0027] Figure 9 This is a cross-sectional view of the entire utility model;

[0028] Figure 10 for Figure 9 A magnified structural diagram of section D in the middle.

[0029] In the diagram: 1. Bracket; 2. Terminal block unit; 3. Input conductive element; 4. Output conductive element; 5. Mounting cavity; 6. Inlet / outlet; 7. Elastic barb; 8. Socket; 9. Limiting part; 10. Clearance gap; 11. Flaring; 12. Guide slope; 13. Positioning boss; 14. Recessed part; 15. Positioning groove; 16. Positioning protrusion; 17. Limiting baffle; 18. Mounting plate; 19. Mounting hole; 20. Reinforcing rib; 21. Terminal housing; 22. Protrusion. 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 1-10 The diagram shows a fixed circuit breaker terminal block, comprising a bracket 1 and multiple terminal block units 2 arranged side-by-side on the bracket 1. Each terminal block unit 2 includes a terminal housing 21 and an input conductive element 3 and an output conductive element 4 disposed within the terminal housing 21. The input conductive element 3 and the output conductive element 4 are connected by wires and are electrically connected. The bracket 1 has a mounting cavity 5 for accommodating the terminal block units 2, and the side of the bracket 1 has an inlet / outlet 6 for inserting the terminal block units 2 into the mounting cavity 5. The terminal housing 21 of each terminal block unit 2 has at least one elastic barb 7. The extension direction of the elastic barb 7 is parallel to the direction in which the terminal unit 2 is inserted into the mounting cavity 5. The bracket 1 has a socket 8 for inserting the elastic barb 7 on the side away from the inlet and outlet 6. That is, the direction in which the elastic barb 7 is inserted into the socket 8 is parallel to the direction in which the terminal housing 21 is inserted into the mounting cavity 5. The inner wall of the socket 8 has a limiting part 9 for limiting the elastic barb 7 so that it cannot be released from the socket 8 in the free state. The other side of the inner wall of the socket 8 opposite to the limiting part 9 has a clearance gap 10 between it and the elastic barb 7. When the elastic barb 7 is deformed to the clearance gap 10 by external force, the elastic barb 7 disengages from the limiting part 9. Each terminal block unit 2 is individually mounted on the bracket 1 via a snap-fit ​​connection. During installation, the elastic hook 7 on the terminal housing 21 of the terminal block unit 2 is inserted into the socket 8 of the bracket 1. The elastic hook 7 hooks onto the limiting part 9 inside the socket 8, thus limiting the elastic hook 7 and preventing it from loosening out of the socket 8. For disassembly, simply apply force to the elastic hook 7, causing it to deform in the opposite direction of the clearance gap 10. After the elastic hook 7 disengages from the limiting part 9, the locking of the limiting part 9 is released, and the terminal housing 21 can be pulled out to separate the terminal block unit 2 from the bracket 1. This process is very convenient. Multiple terminal blocks 2 can be evenly and neatly arranged on the bracket 1 as needed, without interfering with each other, resulting in a stable and reliable structure. The same terminal block unit 2 can be used with mounting brackets 1 of different shapes and structures, meeting the requirements of different customers regarding the number of terminal blocks 2 and the structure of the bracket 1, offering the advantage of flexible assembly.

[0032] As attached Figure 6 and attached Figure 7As shown, two elastic barbs 7 are provided on the side of the terminal housing 21 that abuts against the inner side of the mounting cavity 5 of the bracket 1, and the two elastic barbs 7 are arranged in a vertically mirrored manner. Similarly, the limiting portions 9 in the two corresponding insertion holes 8 on the bracket 1 of the same terminal housing 21 are also arranged in a vertically mirrored manner. That is, in this embodiment, the limiting portion 9 in the upper insertion hole 8 is located on the upper side of the insertion hole 8, and the limiting portion 9 in the lower insertion hole 8 is located on the lower side of the insertion hole 8. This symmetrical locking structure allows for balanced force distribution in both directions. The symmetrical structure can evenly disperse external impact forces, preventing deformation or breakage of a single elastic barb 7 due to force. Simultaneously, it improves the anti-loosening performance, limiting the upward or downward offset of the two elastic barbs 7 under vibration conditions, thus making the locking structure more stable and reliable.

[0033] As attached Figure 6 and attached Figure 7 As shown, the end of the socket 8 near the mounting cavity 5 has a flared opening 11 that is larger on the outside and smaller on the inside, i.e., a flared shape. When assembling the terminal block, the flared opening 11 of the socket 8 makes it easier for the elastic barb 7 on the terminal housing 21 to be inserted into the socket 8, making assembly easier and more convenient.

[0034] As attached Figure 6 and attached Figure 7 As shown, the limiting part 9 has a guide slope 12 at one end near the mounting cavity 5, and the cross-section of the limiting part 9 can be a right trapezoid. During the insertion of the elastic barb 7 into the socket 8, the guide slope 12 of the limiting part 9 gradually applies a force to the elastic barb 7, causing the elastic barb 7 to gradually deform until it passes over the limiting part 9 and abuts against the end of the limiting part 9 away from the guide slope 12 to form a limiting fit, which further facilitates the assembly operation of the wiring terminal.

[0035] As attached Figures 2-10 As shown, the terminal housing 21 of the terminal unit 2 is integrally provided with a positioning boss 13 at its bottom. The positioning boss 13 has a recess 14 on each of its left and right sides, and two adjacent recesses 14 on each adjacent terminal housing 21 form a positioning groove 15. The bottom of the bracket 1 is integrally provided with multiple positioning protrusions 16 for insertion into the corresponding positioning grooves 15. This positioning structure restricts the terminal housing 21 of the terminal unit 2 onto the bracket 1. This positioning structure, in conjunction with a snap-fit ​​structure, provides multi-point locking and positioning, stably and firmly positioning the terminal unit 2 onto the bracket 1, resulting in higher structural reliability.

[0036] As attached Figure 6 and attached Figure 8As shown, the terminal housing 21 of the terminal unit 2 has an integrally formed protrusion 22 on its upper end. The bracket 1 has an integrally formed limiting baffle 17 at the position corresponding to the upper end of the mounting cavity 5, which is used to abut against the front side of the protrusion 22. That is, the side of the bracket 1 away from the inlet / outlet 6 of the mounting cavity 5 is considered the front side. The elastic barb 7 is provided on the front side of the terminal housing 21 and the front side of the protrusion 22. The insertion hole 8 and the limiting part 9 are respectively provided on the front side of the bracket 1 and the front side of the limiting baffle 17. The limiting baffle 17 further limits and supports the terminal unit 2, and the limiting baffle 17 is connected to the upper end of the terminal unit 2 by means of the elastic barb 7, thereby further improving the stability of the installation of the terminal unit 2.

[0037] As attached Figure 2 As shown, a mounting plate 18 is provided on each of the two sides of the bracket 1. The mounting plate 18 has mounting holes 19 for fasteners to pass through. A reinforcing rib 20 is also provided between the mounting plate 18 and the bracket 1. The reinforcing rib 20 has an L-shaped cross-section. This design facilitates the overall fixing of the terminal block to the mounting surface. At the same time, the reinforcing rib 20 between the mounting plate 18 and the bracket 1 effectively improves the strength of the overall mounting structure.

Claims

1. A terminal block for a fixed circuit breaker, comprising a bracket (1) and a plurality of terminal block units (2) arranged side-by-side on the bracket (1), wherein each terminal block unit (2) comprises a terminal housing (21) and an input conductive element (3) and an output conductive element (4) disposed within the terminal housing (21), the input conductive element (3) and the output conductive element (4) being electrically connected, the bracket (1) having a mounting cavity (5) for accommodating the terminal block units (2), and the side of the bracket (1) having an inlet (6) for inserting the terminal block units (2) into the mounting cavity (5); characterized in that: The terminal housing (21) of the terminal unit (2) is provided with at least one elastic barb (7). The extension direction of the elastic barb (7) is parallel to the direction in which the terminal unit (2) is inserted into the mounting cavity (5). The bracket (1) is provided with a socket (8) for inserting the elastic barb (7) on the side away from the inlet and outlet (6). The inner wall of the socket (8) is provided with a limiting part (9) for limiting the elastic barb (7) so that it cannot be released from the socket (8) in the free state. The other side of the inner wall of the socket (8) opposite to the limiting part (9) is provided with a clearance gap (10) between the elastic barb (7) and the inner wall of the socket (8). When the elastic barb (7) is deformed to the clearance gap (10) by external force, the elastic barb (7) disengages from the limiting part (9).

2. The wiring terminal of a fixed circuit breaker according to claim 1, characterized in that: The number of elastic barbs (7) provided on the side of the terminal housing (21) that abuts against the inner side of the mounting cavity (5) of the bracket (1) is two, and the two elastic barbs (7) are arranged in a vertical mirror image. The limiting parts (9) in the two insertion holes (8) on the bracket (1) corresponding to the same terminal housing (21) are also arranged in a vertical mirror image.

3. The wiring terminal of a fixed circuit breaker according to claim 2, characterized in that: The insertion hole (8) has a flared opening (11) that is larger on the outside and smaller on the inside at one end near the mounting cavity (5).

4. The wiring terminal of a fixed circuit breaker according to claim 2, characterized in that: The limiting part (9) has a guide slope (12) at one end near the mounting cavity (5).

5. The wiring terminal of a fixed circuit breaker according to claim 1, characterized in that: The terminal housing (21) of the terminal unit (2) is provided with a positioning boss (13) at the bottom. The positioning boss (13) is provided with a recess (14) on the left and right sides respectively. The two recesses (14) on each adjacent two terminal housings (21) form a positioning groove (15). The bottom of the bracket (1) is provided with a plurality of positioning protrusions (16) for inserting into the corresponding positioning grooves (15).

6. The wiring terminal of a fixed circuit breaker according to claim 1, characterized in that: The terminal housing (21) of the terminal unit (2) has a protrusion (22) at the upper end. The bracket (1) is provided with a limiting baffle (17) at the upper end of the mounting cavity (5) to abut against the front side of the protrusion (22). The elastic barb (7) is provided on the front side of the terminal housing (21) and the front side of the protrusion (22). The socket (8) and the limiting part (9) are provided on the front side of the bracket (1) and the front side of the limiting baffle (17).

7. The wiring terminal of a fixed circuit breaker according to claim 1, characterized in that: The bracket (1) is provided with a mounting plate (18) on each side. The mounting plate (18) is provided with mounting holes (19) for fasteners to pass through. A reinforcing rib (20) is also provided between the mounting plate (18) and the bracket (1).

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