Wiring terminal of circuit breaker

Abstract

The utility model discloses a wiring terminal of a circuit breaker, which comprises a support and a plurality of wiring terminal units arranged on the support side by side, each wiring terminal unit comprises a terminal shell, a metal contact piece and a metal elastic piece, and the support is provided with a mounting cavity and an inlet / outlet; a terminal shell of the wiring terminal unit is connected with a support through at least two sets of buckle assemblies, each buckle assembly comprises a lock rod arranged on the terminal shell, a lock hole matched with the lock rod is formed in the position, corresponding to the inner end of a mounting cavity, of the support, and when the lock rod is matched with the lock hole, the first state that the lock rod is locked in the lock hole in the free state is achieved; and in the second state, deformation is generated under the action of external force, so that the terminal shell can be driven by the terminal shell to be separated from the lock hole. The wiring terminal unit is stable and reliable in structure and good in universality, the same wiring terminal unit can be matched with supports of different structures, the requirements of different clients for the number of the wiring terminal units and the support structure can be met, and the wiring terminal unit has the advantage of being flexible to assemble.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to the wiring terminals of fixed circuit breakers. 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, commonly used fixed circuit breaker terminals on the market consist of a bracket and multiple terminal units mounted on the bracket. These terminal units are arranged side-by-side on the bracket, and are secured 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 varying requirements regarding the number of terminal units and the bracket's shape and structure. Using traditional structures, 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 specific sizes to fit different brackets, increasing costs. Therefore, there is an urgent need in the market for a more versatile and flexible fixed 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 circuit breaker terminal block. This utility model has a stable and reliable structure, good versatility, and the same terminal block unit can be used with brackets of different structures to meet the requirements of different customers for the number of terminal block 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 circuit breaker terminal block, including a bracket and multiple terminal block units arranged side by side on the bracket. Each terminal block unit includes a terminal housing and metal contacts and metal springs disposed within the terminal housing. The metal contacts and metal springs are electrically connected. The bracket has a mounting cavity for accommodating the terminal block units, and the side of the bracket has an inlet and outlet for the terminal block units to be inserted into the mounting cavity. The terminal housing of the terminal block unit is connected to the bracket through at least two sets of snap-fit ​​assemblies. Each snap-fit ​​assembly includes a locking rod disposed on the terminal housing. The bracket has a locking hole corresponding to the inner end of the mounting cavity that cooperates with the locking rod. When the locking rod cooperates with the locking hole, it has a first state in which it is locked in the locking hole in a free state, and a second state in which it deforms under external force and can be disengaged from the locking hole by the terminal housing.

[0006] By adopting the above technical solution, each terminal block unit is individually installed on the bracket via a snap-fit ​​connection. During installation, the locking rod on the terminal housing of the terminal block unit is inserted into the locking hole of the bracket, and the locking rod and locking hole lock tightly together, securing the terminal block unit. For disassembly, simply apply force to the locking rod to deform it, releasing the lock between the rod and the locking hole, and pull out the terminal housing to separate the terminal block unit from the bracket. This makes assembly and disassembly very convenient. Multiple terminal blocks can be evenly and neatly arranged on the bracket as needed, without interfering with each other, ensuring 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 locking rod includes a rod body and at least one barb portion disposed at the end of the rod body, and the locking hole is provided with a limiting step that forms a limiting engagement with the barb portion.

[0008] By adopting the above technical solution, the locking rod is composed of a rod body and a barb. When the barb on the locking rod hooks onto the limiting step, it can prevent the locking rod from disengaging from the locking hole, thereby realizing the locking installation of the terminal unit. When the force is applied to the barb to deform it and disengage from the limiting step, the corresponding terminal unit can be separated from the bracket. The structure is simple and reliable, and disassembly and assembly are very convenient.

[0009] The present invention is further configured such that there are two barbs, and a clearance groove is provided between the two barbs.

[0010] By adopting the above technical solution, the two barbs cooperate with the limiting step, the force is stable, the locking structure has good reliability, and the processing is very convenient. It is only necessary to open a slot (i.e., a clearance slot) at the end of the locking rod to form two barbs.

[0011] The present invention is further configured such that the outer diameter of the rod body is equivalent to the inner diameter of the lock hole.

[0012] By adopting the above technical solution, after the terminal block unit is installed on the bracket, radial runout of the locking rod can be avoided, ensuring the stability of the terminal block unit installation structure.

[0013] The present invention is further configured such that the direction of movement of the terminal block unit into the mounting cavity is the same as the direction of movement of the locking rod into the corresponding lock hole.

[0014] By adopting the above technical solution, the two are installed in the same direction. The terminal block unit can be installed simply by pushing it to the corresponding position in the bracket mounting cavity. The installation is very convenient with just one operation.

[0015] The present invention is further configured such that there is a clearance fit between the terminal housings of every two adjacent terminal units.

[0016] By adopting the above technical solution, a certain floating gap is reserved between each two adjacent terminal units, which can ensure that the terminal units do not interfere with each other and eliminate the impact of differences in the machining accuracy of parts.

[0017] The present invention is further configured such that the terminal housing of the terminal unit has a protrusion at the upper end, and the bracket has an upper pressure plate at the position corresponding to the upper end of the mounting cavity for abutting against the upper end of the protrusion. A limiting plate extends downward on the upper pressure plate for abutting against the front side of the protrusion, and the protrusion is connected to the limiting plate through the buckle assembly.

[0018] By adopting the above technical solution, the upper pressure plate further supports the terminal block unit, and the upper pressure plate is connected to the upper end of the terminal block unit by a snap-fit ​​connection, thereby further improving the stability of the terminal block unit installation.

[0019] The present invention is further configured such that the bracket is provided with a plurality of first limiting grooves at the lower end of the mounting cavity, and the upper pressure plate is provided with a plurality of second limiting grooves at the side of the mounting cavity. The first limiting grooves and the second limiting grooves extend inward from the inlet and outlet, and the extension direction of the first limiting grooves and the second limiting grooves is the same as the installation direction of the terminal unit. The lower end of the terminal housing and the upper end of the protrusion are respectively provided with a first limiting protrusion that matches the first limiting groove and a second limiting protrusion that matches the second limiting groove.

[0020] By adopting the above technical solution, the terminal housing of the terminal block unit is restricted to the bracket by the limiting structure. The limiting structure, together with the snap-fit ​​structure, stably and firmly positions the terminal block unit on the bracket, resulting in higher structural reliability. Attached Figure Description

[0021] Figure 1 This is a perspective view of the entire utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the bracket of this utility model;

[0023] Figure 3 This is a schematic diagram of the terminal block unit of this utility model;

[0024] Figure 4 for Figure 3 Enlarged structural diagram of section A in the middle;

[0025] Figure 5 This is a cross-sectional view of the entire utility model;

[0026] Figure 6 for Figure 5 A magnified structural diagram of section B.

[0027] In the diagram: 1. Bracket; 2. Terminal block unit; 3. Terminal housing; 4. Metal contact piece; 5. Metal spring; 6. Mounting cavity; 7. Inlet / outlet; 8. Snap-fit ​​assembly; 9. Locking rod; 10. Locking hole; 11. Rod body; 12. Barb; 13. Limiting step; 14. Relief groove; 15. Protrusion; 16. Upper pressure plate; 17. Limiting plate; 18. First limiting groove; 19. Second limiting groove; 20. First limiting protrusion; 21. Second limiting protrusion. Detailed Implementation

[0028] 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.

[0029] Example: As attached Figures 1-6The circuit breaker terminals shown include a bracket 1 and multiple terminal units 2 arranged side by side on the bracket 1. Each terminal unit 2 includes a terminal housing 3 and metal contacts 4 and metal springs 5 ​​disposed within the terminal housing 3. The metal contacts 4 and metal springs 5 ​​are electrically connected. This structure is conventional technology. For example, the improved terminal structure for a fixed circuit breaker disclosed in Chinese Utility Model Patent Application No. CN201420866054.1 describes the installation structure of the metal contacts 4 and metal springs 5. The bracket 1 is provided with a mounting cavity 6 for accommodating the terminal block unit 2. The side of the bracket 1 is provided with an inlet and outlet 7 for the terminal block unit 2 to be inserted into the mounting cavity 6. The terminal housing 3 of the terminal block unit 2 is connected to the bracket 1 through at least two sets of snap-fit ​​components 8. The snap-fit ​​component 8 includes a locking rod 9 integrally disposed on the terminal housing 3. The bracket 1 is provided with a locking hole 10 corresponding to the inner end of the mounting cavity 6, which cooperates with the locking rod 9. When the locking rod 9 cooperates with the locking hole 10, it has a first state in which it is locked in the locking hole 10 in a free state, and a second state in which it deforms under the action of external force so that it can be disengaged from the locking hole 10 by the terminal housing 3. Each terminal block unit 2 is individually mounted on the bracket 1 via a snap-fit ​​connection. During installation, the locking rod 9 on the terminal housing 3 of the terminal block unit 2 is inserted into the locking hole 10 of the bracket 1, locking the terminal block unit 2 in place. Disassembly is simple: apply force to the locking rod 9 to deform it, releasing the lock and allowing the terminal housing 3 to be pulled out, separating the terminal block unit 2 from the bracket 1. This makes assembly and disassembly very convenient. Multiple terminal blocks 2 can be evenly and neatly arranged on the bracket 1 as needed, without interfering with each other, ensuring 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.

[0030] The specific details of the buckle component 8 are as shown in the attached document. Figures 2-6 As shown, the locking rod 9 includes a rod body 11 and at least one barb portion 12 disposed at the end of the rod body 11. The locking hole 10 is provided with a limiting step 13 that forms a limiting engagement with the barb portion 12. The locking rod 9 is composed of the rod body 11 and the barb portion 12. When the barb portion 12 on the locking rod 9 hooks the limiting step 13, it can prevent the locking rod 9 from disengaging from the locking hole 10, thereby achieving the locking installation of the terminal unit 2. When a force is applied to the barb portion 12 to deform it and disengage it from the limiting step 13, the corresponding terminal unit 2 can be separated from the bracket 1. The structure is simple and reliable, and disassembly and assembly are very convenient.

[0031] More specifically, in this embodiment, as shown in the appendix Figure 4As shown, there are two barbs 12, and a clearance groove 14 is provided between the two barbs 12. The two barbs 12 cooperate with the limiting step 13, which provides stable force, good locking structure reliability, and is very easy to process. Only a slot (i.e., clearance groove 14) needs to be opened at the end of the locking rod 9 to form two barbs 12. Multiple barbs 12 can also be set by setting different clearance grooves 14, such as a cross-shaped groove, which can achieve the setting of four barbs 12.

[0032] The outer diameter of the rod body 11 is approximately equal to the inner diameter of the lock hole 10. After mounting the terminal block unit 2 on the bracket 1, radial runout of the locking rod 9 can be prevented, ensuring the stability of the terminal block unit 2 mounting structure.

[0033] The terminal block unit 2 moves into the mounting cavity 6 in the same direction as the locking rod 9 inserts into the corresponding locking hole 10. Since both are installed in the same direction, the terminal block unit 2 can be installed simply by pushing it to the corresponding position in the mounting cavity 6 of the bracket 1; this single installation action makes the operation very convenient.

[0034] The specific arrangement of the terminal block units 2 is as follows: the terminal housings 3 of every two adjacent terminal block units 2 are fitted with a clearance. A certain floating gap is reserved between every two adjacent terminal block units 2 to ensure that the terminal block units 2 do not interfere with each other and to eliminate the influence of differences in the machining accuracy of the parts. Of course, if the machining accuracy is high, they can also be tightly pressed together.

[0035] As attached Figure 5 As shown, the terminal housing 3 of the terminal unit 2 has an integrally formed protrusion 15 on its upper end. The bracket 1 has an integrally formed upper pressure plate 16 at the position corresponding to the upper end of the mounting cavity 6, for abutting against the upper end of the protrusion 15. A limiting plate 17 extends downward from the upper pressure plate 16 for abutting against the front side of the protrusion 15. The protrusion 15 is connected to the limiting plate 17 via the snap-fit ​​assembly 8. The upper pressure plate 16 further supports the terminal unit 2, and the snap-fit ​​connection further enhances the stability of the terminal unit 2 installation.

[0036] As attached Figure 5As shown, the bracket 1 has multiple first limiting grooves 18 at the lower end of the mounting cavity 6, and the upper pressure plate 16 has multiple second limiting grooves 19 near the mounting cavity 6. Both the first limiting grooves 18 and the second limiting grooves 19 extend inward from the inlet / outlet 7, and their extending directions are the same as the mounting direction of the terminal unit 2. The lower end of the terminal housing 3 and the upper end of the protrusion 15 are respectively provided with a first limiting protrusion 20 that matches the first limiting groove 18 and a second limiting protrusion 21 that matches the second limiting groove 19. The limiting structure restricts the terminal housing 3 of the terminal unit 2 onto the bracket 1. The limiting structure, in conjunction with the snap-fit ​​structure, stably and firmly positions the terminal unit 2 onto the bracket 1, resulting in higher structural reliability.

Claims

1. A circuit breaker terminal block, 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 (3) and a metal contact (4) and a metal spring (5) disposed within the terminal housing (3), the metal contact (4) and the metal spring (5) being electrically connected, the bracket (1) having a mounting cavity (6) for accommodating the terminal block units (2), and the side of the bracket (1) having an inlet (7) for inserting the terminal block units (2) into the mounting cavity (6); characterized in that: The terminal housing (3) of the terminal unit (2) is connected to the bracket (1) through at least two sets of snap-fit ​​assemblies (8). The snap-fit ​​assembly (8) includes a locking rod (9) disposed on the terminal housing (3). The bracket (1) is provided with a locking hole (10) corresponding to the inner end of the mounting cavity (6) to cooperate with the locking rod (9). When the locking rod (9) cooperates with the locking hole (10), it has a first state in which it is locked in the locking hole (10) in a free state, and a second state in which it deforms under the action of external force so that it can be disengaged from the locking hole (10) by the terminal housing (3).

2. The wiring terminals of the circuit breaker according to claim 1, characterized in that: The locking bar (9) includes a bar body (11) and at least one barb (12) disposed at the end of the bar body (11). The locking hole (10) is provided with a limiting step (13) that forms a limiting fit with the barb (12).

3. The wiring terminals of the circuit breaker according to claim 2, characterized in that: The number of the barb portions (12) is two, and a clearance groove (14) is provided between the two barb portions (12).

4. The wiring terminals of the circuit breaker according to claim 2, characterized in that: The outer diameter of the rod body (11) is equivalent to the inner diameter of the lock hole (10).

5. The wiring terminals of the circuit breaker according to claim 2, characterized in that: The direction of movement of the terminal block unit (2) into the mounting cavity (6) is the same as the direction of movement of the locking rod (9) into the corresponding lock hole (10).

6. The wiring terminals of the circuit breaker according to claim 1, characterized in that: The terminal housings (3) of each pair of adjacent terminal units (2) are fitted with a clearance.

7. The wiring terminals of the circuit breaker according to any one of claims 1 to 6, characterized in that: The terminal housing (3) of the terminal unit (2) is provided with a protrusion (15) at the upper end. The bracket (1) is provided with an upper pressure plate (16) at the position corresponding to the upper end of the mounting cavity (6) for abutting against the upper end of the protrusion (15). A limiting plate (17) extends downward on the upper pressure plate (16) for abutting against the front side of the protrusion (15). The protrusion (15) is connected to the limiting plate (17) through the buckle assembly (8).

8. The wiring terminals of the circuit breaker according to claim 7, characterized in that: The bracket (1) is provided with a plurality of first limiting grooves (18) at the lower end of the mounting cavity (6), and the upper pressure plate (16) is provided with a plurality of second limiting grooves (19) on the side near the mounting cavity (6). The first limiting grooves (18) and the second limiting grooves (19) extend inward from the inlet and outlet (7), and the extension direction of the first limiting grooves (18) and the second limiting grooves (19) is the same as the installation direction of the terminal unit (2). The lower end of the terminal housing (3) and the upper end of the protrusion (15) are respectively provided with a first limiting protrusion (20) that matches the first limiting groove (18) and a second limiting protrusion (21) that matches the second limiting groove (19).

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