A terminal block for drawer-type frame circuit breaker

Abstract

The present invention is a terminal block for a drawer-type frame circuit breaker, comprising a plurality of static wiring terminals and a plurality of dynamic wiring terminals, the static wiring terminals and the dynamic wiring terminals are plugged together, the static wiring terminals are arranged in the same row to form a static module group, and the dynamic wiring terminals are arranged in the same row to form a dynamic module group, characterized in that the dynamic module group is arranged on a fixed bracket, the fixed bracket is made of insulating material, the fixed bracket is formed with a cavity for accommodating the dynamic wiring terminal, one end of the cavity is formed with a first snap groove on the mounting surface of the fixed bracket, the wiring side of the cavity is provided with a second snap groove, the dynamic wiring terminal is provided with locking snaps corresponding to the first snap groove and the second snap groove, and a fixed plate is provided on the fixed bracket. The present invention wraps the fixed plate by providing a fixed bracket to avoid direct contact with the arc caused by poor arc extinguishing effect of the arc extinguishing chamber, thereby improving the stability and reliability of the secondary terminal block.

Description

Technical Field

[0001] The invention mainly relates to the technical field of low-voltage electrical appliance accessories, and in particular to a terminal block for a drawer-type frame circuit breaker. Background Art

[0002] In the drawer-type frame circuit breaker, electrical connection needs to be achieved through the secondary terminal block. Generally, the secondary terminal block is set at the outlet of the arc extinguishing chamber of the frame circuit breaker. However, when the arc extinguishing effect in the arc extinguishing chamber is not good, the arc at its outlet will move to the secondary terminal block, which will inevitably affect the secondary terminal block. The secondary terminal block in the prior art generally includes a fixed plate, a static terminal and a dynamic terminal. The static terminal and the dynamic terminal are electrically connected by plug-in matching. The fixed plate will directly contact the arc. The function of the fixed plate is to connect with the frame circuit breaker. The materials used are all metal materials. Metal materials are easy to conduct electricity. The fixed plate contacts the charged body, which may cause electric shock or other safety accidents. In addition, the thermal expansion coefficient of metal materials is high. When the temperature changes greatly, it may deform, thereby affecting the stability and reliability of the connection. Summary of the invention

[0003] The object of the present invention is to provide a terminal block for a drawer-type frame circuit breaker, wherein a fixing bracket made of insulating material is used to place a fixing plate, thereby realizing an arc isolation operation on the fixing plate.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A terminal block for a drawer-type frame circuit breaker comprises a plurality of static wiring terminals and a plurality of dynamic wiring terminals, wherein the static wiring terminals and the dynamic wiring terminals are plugged and matched, the static wiring terminals are arranged in the same row to form a static module group, the dynamic wiring terminals are arranged in the same row to form a dynamic module group, the dynamic module group is arranged on a fixed bracket, the fixed bracket is made of an insulating material, the fixed bracket is formed with a cavity for accommodating the dynamic wiring terminals, one end of the cavity is formed with a first buckle groove on the mounting surface of the fixed bracket, a second buckle groove is arranged on the wiring side of the cavity, the dynamic wiring terminals are provided with locking buckles corresponding to the first buckle groove and the second buckle groove, and a fixing plate is arranged on the fixed bracket.

[0006] The present invention further provides that a fixing plate is provided on the mounting surface of the movable module close to the fixing bracket, and the fixing plate is inserted into a slot formed on the fixing bracket.

[0007] The present invention is further arranged that the static wiring terminal is arranged in a corresponding shell, and a wiring hole and a driving hole are arranged on the wiring side of the shell of the static wiring terminal, a driving member is arranged in the driving hole, and the wiring hole and the driving hole are arranged side by side. A rotating spring piece and an electrical connection plate are arranged in the static wiring terminal, and the rotating end of the rotating spring piece is sleeved on a column formed in the static wiring terminal. When wiring, the driving member moves into the driving hole so that one end of the rotating spring piece is separated from the electrical connection plate to form a wiring space. When the wiring is completed, the driving member is reset under the self-restoring force of the rotating spring piece, and at the same time, the wire is pressed to realize the electrical connection between the wire and the electrical connection plate.

[0008] The present invention further provides that the rotating spring sheet also includes free ends arranged on both sides of the rotating end, free end one is used to press the wire against one end of the electrical connection plate, and free end two is separated from or in contact with one end of the electrical connection plate.

[0009] The present invention is further arranged that the moving terminal is arranged in a corresponding shell, a moving contact is arranged in the shell of the moving terminal, conductive parts are arranged on both sides of the moving contact, the moving contact is inserted into the slot of the static terminal, conductive springs conductively connected to the conductive parts are arranged on both sides of the slot, the conductive springs are clamped on both sides of the slot, the end of the conductive spring has a conductive end, and when the moving contact is inserted into the slot, the conductive end is squeezed to form an electrical connection with the conductive part.

[0010] The present invention is further arranged that the conductive end and the conductive part are in surface contact, and a clamping piece is provided on the side of the conductive spring sheet close to the conductive end. When the conductive end is squeezed, the conductive end moves toward the clamping piece. In a natural state, the conductive end and the clamping piece are spaced a certain distance apart. When the conductive end is squeezed, the moving distance of the conductive end is greater than the distance between the conductive end and the clamping piece.

[0011] The present invention is further arranged that the conductive end and the conductive part are in surface contact, a clamping piece is arranged on the conductive part, and in a natural state, there is a clamping distance between the clamping piece and the conductive part, and when the moving contact is inserted into the slot, the clamping piece contacts the conductive end, and when the moving contact is fully inserted, the conductive end is located in the space between the clamping piece and the conductive part, and is electrically connected to the clamping piece, wherein the thickness of the conductive end is greater than the clamping distance.

[0012] The present invention further provides that the pressing member is a sheet-like structure with elasticity.

[0013] The present invention further provides that the clamping piece is a curved structure and is distributed at both ends of the conductive part.

[0014] The present invention further provides that a protrusion is provided on the side of the conductive part of the movable contact, and a groove is formed on the conductive part correspondingly for cooperating with the protrusion to fix the conductive part on the movable contact.

[0015] Beneficial effects of the present invention: The present invention wraps the fixing plate by arranging a fixing bracket to avoid direct contact with the arc caused by poor arc extinguishing effect of the arc extinguishing chamber, thereby improving the stability and reliability of the secondary terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a stereogram of an embodiment of the present invention.

[0018] Figure 2 It is a side view of an embodiment of the present invention.

[0019] Figure 3 It is a cross-sectional view of embodiment 2 of the present invention.

[0020] Figure 4 This is one of the three-dimensional views of the fixing bracket according to the embodiment of the present invention.

[0021] Figure 5 It is a schematic structural diagram of a rotating spring piece according to embodiment 2 of the present invention.

[0022] Figure 6 This is the second stereoscopic view of the fixing bracket according to the embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the moving contact of Example 2 of the present invention.

[0024] Figure 8 Schematic diagram of the structure of the conductive end of embodiment 2 of the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure of the conductive spring piece according to the first embodiment of the present invention.

[0026] Fig.10 It is a three-dimensional diagram of the conductive end of embodiment 2 of the present invention.

[0027] Fig.11 Schematic diagram of the structure of a fixing plate according to an embodiment of the present invention.

[0028] Fig.12 Schematic diagram of the structure of the tool according to the embodiment of the present invention.

[0029] Reference numerals:

[0030] 10. Static module; 101. Static terminal; 1011. Wiring hole; 1012. Driving hole; 1013. Driving member; 10131. Driving body; 10132. Operating slot; 10133. Baffle; 1014. Rotating spring; 10141. Free end 1; 10142. Free end 2; 102. Electrical connection plate; 103. Column; 104. Conductive spring; 1041. Conductive end; 1042. Pressing member; 20. Moving module; 201. Moving terminal Sub; 2011, locking buckle; 202, moving contact; 2021, conductive part; 20211, groove; 20212, clamping piece; 203, protrusion; 30, fixed bracket; 301, cavity; 3011, first buckle groove; 3012, second buckle groove; 302, mounting surface; 303, slot; 304, side plate; 305, limit plate; 40, fixed plate; 401, plug plate; 402, notch; 50, tool; 501, beam; 502, operating column. DETAILED DESCRIPTION

[0031] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example

[0032] like Figure 1-Figure 12 As shown, the present invention is a terminal block for a drawer-type frame circuit breaker, comprising a plurality of static wiring terminals 101 and a plurality of dynamic wiring terminals 201, the static wiring terminals 101 and the dynamic wiring terminals 201 are plugged together, the static wiring terminals 101 are arranged in the same row to form a static module group 10, the dynamic wiring terminals 201 are arranged in the same row to form a dynamic module group 20, the dynamic module group 20 is arranged on a fixed bracket 30, the fixed bracket 30 is made of an insulating material, the fixed bracket 30 is formed with a cavity 301 for accommodating the dynamic wiring terminal 201, one end of the cavity 301 is formed with a first buckle groove 3011 on the mounting surface 302 of the fixed bracket 30, the wiring side of the cavity 301 is provided with a second buckle groove 3012, the dynamic wiring terminal 201 is provided with a locking buckle 2011 corresponding to the first buckle groove 3011 and the second buckle groove 3012, and a fixing plate 40 is provided on the fixed bracket 30. Specifically, the fixing plate 40 is disposed on the side of the mounting surface 302 of the movable die assembly 20 close to the fixing bracket 30 . A slot 303 is formed on the fixing bracket 30 on this side, and the fixing plate 40 is inserted into the slot 303 formed on the fixing bracket 30 .

[0033] The present invention provides a fixing bracket 30 to wrap the fixing plate 40, thereby preventing the fixing plate 40 from directly contacting the arc caused by the poor arc extinguishing effect of the arc extinguishing chamber, thereby improving the stability and reliability of the secondary terminal row. The fixing bracket 30 is connected to the dynamic connection terminal 201 by snapping, and the assembly is more convenient and quick.

[0034] In this embodiment, a plurality of plug plates 401 are formed on the fixed plate 40, and a plurality of slots 402 are formed between the plug plates 401. The corresponding fixed brackets 30 have side plates 304 that are in contact with the fixed plate 40, and slots 303 are formed between the side plates 304 and the side of the cavity 301. A limiting plate 305 is provided between the side of the cavity 301 and the side plates 304, and the limiting plate 305 is arranged corresponding to the slot 402. When the fixed plate 40 is inserted into the slot 303, the limiting plate 305 is distributed in the slot 402, and the plug plates 401 are located between the areas formed by the limiting plates 305.

[0035] In this embodiment, the static wiring terminal 101 is arranged in a corresponding shell, and a wiring hole 1011 and a driving hole 1012 are arranged on the wiring side of the shell of the static wiring terminal 101. A driving member 1013 is arranged in the driving hole 1012. The wiring hole 1011 and the driving hole 1012 are arranged side by side. A rotating spring 1014 and an electrical connection plate 102 are arranged in the static wiring terminal 101. The rotating end of the rotating spring 1014 is sleeved on the column 103 formed in the static wiring terminal 101. When wiring, the driving member 1013 moves into the driving hole 1012, so that one end of the rotating spring 1014 is separated from the electrical connection plate 102 to form a wiring space. When the wiring is completed, the driving member 1013 is reset under the self-restoring force of the rotating spring 1014, and at the same time, the wire is pressed to realize the electrical connection between the wire and the electrical connection plate 102.

[0036] The rotating spring piece 1014 also includes free ends arranged on both sides of the rotating end. The first free end 10141 is used to press the wire against one end of the electrical connection board 102, and the second free end 10142 is separated from or in contact with one end of the electrical connection board 102.

[0037] The driving member 1013 includes a driving body 10131 and a baffle 10133 arranged on one side of the driving body 10131. The outer end surface of the driving body 10131 is provided with an operating groove 10132. The inner end surface of the driving body 10131 on the operating groove 10132 acts on the free end 10141 of the rotating spring 1014 to rotate it. The baffle 10133 extends to the side of the free end 10141 to ensure its stability and reliability during the rotation process. The operating groove 10132 is realized by a tool 50, wherein the tool 50 can be used as follows. Fig.12The structure includes a crossbeam 501 and an operating column 502 arranged on the crossbeam 501. The spacing between the operating columns 502 is set according to the distribution of the driving member 1013. Through the above method, the method of wiring through screws in the prior art is changed. The driving member 1013 is used in conjunction with the tool 50. The tool 50 can achieve wiring operation by pressing once, which simplifies the wiring operation. It is worth mentioning that even if the one-press method is not adopted, the wiring of this application is faster and more convenient than that of screw wiring.

[0038] In addition, in the prior art, when the moving contact 202 is connected to the static terminal 101, when the moving contact 202 is connected to the spring inside the static terminal 101, the electrical connection between the spring and the moving contact 202 is generally point contact, and the contact area between the two is small, and the conductive effect still has room for improvement. Based on the above, the present embodiment further adopts the following scheme: the moving terminal 201 is arranged in a corresponding housing, and the moving contact 202 is arranged in the housing of the moving terminal 201. The moving contact 202 Conductive parts 2021 are provided on both sides of the moving contact 202, and the moving contact 202 is inserted into the slot 303 of the static terminal 101. Conductive springs 104 conductively connected to the conductive part 2021 are provided on both sides of the slot 303. The conductive springs 104 are clamped on both sides of the slot 303, and the ends of the conductive springs 104 have conductive ends 1041. When the moving contact 202 is inserted into the slot 303, the conductive ends 1041 are squeezed to form an electrical connection with the conductive part 2021.

[0039] Specifically, the conductive end 1041 is in surface contact with the conductive part 2021, and a pressing piece 1042 is provided on the side of the conductive spring sheet 104 close to the conductive end 1041. When the conductive end 1041 is squeezed, the conductive end 1041 moves toward the pressing piece 1042. In the natural state, the conductive end 1041 is spaced a certain distance from the pressing piece 1042. When the conductive end 1041 is squeezed, the moving distance of the conductive end 1041 is greater than the distance between the conductive end 1041 and the pressing piece 1042. The pressing piece is an elastic sheet structure. The natural state is a state where the moving contact 202 is not inserted.

[0040] The above technical solution firstly changes the point-based method in the prior art, that is, the conductive end 1041 is an arc-shaped long section structure, and the conductive end 1041 is inclined in a natural state. When inserted, the conductive end 1041 is squeezed to make it parallel to the conductive part 2021, and the contact area between the two is increased accordingly, ensuring the conductive effect. Secondly, the clamping member is set so that when the conductive end 1041 is squeezed, the clamping member acts on the conductive end 1041 to make it always in contact with the conductive part 2021, further ensuring the conductive effect.

[0041] A protrusion 203 is provided on the side of the conductive part 2021 of the movable contact 202 , and a groove 20211 is formed on the conductive part 2021 to cooperate with the protrusion 203 to fix the conductive part 2021 on the movable contact 202 .

[0042] The conductive part 2021 and the moving contact 202 in the prior art are connected by forming a hook at one end of the conductive part 2021, and a groove is provided at the corresponding position of the moving contact 202, and the hook is embedded in the groove for fixation. However, this method has only single-point fixation and the fixing effect is poor. Therefore, the protrusion 203 and the groove 20211 are provided to cooperate so that the conductive part 2021 as a whole can be stably installed on the moving contact 202. Example

[0043] The present embodiment is similar to the first embodiment in that the conductive end 1041 is in surface contact with the conductive part 2021; the difference is that: the conductive part 2021 is provided with a clamping piece 20212, and in the natural state, there is a clamping distance between the clamping piece 20212 and the conductive part 2021, and when the moving contact 202 is inserted into the slot 303, the clamping piece 20212 is in contact with the conductive end 1041, and when the moving contact 202 is fully inserted, the conductive end 1041 is located in the space between the clamping piece 20212 and the conductive part 2021, and is electrically connected to the clamping piece 20212, wherein the thickness of the conductive end 1041 is greater than the clamping distance. The clamping piece 20212 is a curved structure, and is distributed at both ends of the conductive part 2021. The natural state is a state where the moving contact 202 is not inserted.

[0044] In the above technical solution, the connection between the conductive part 2021 and the conductive end 1041 is achieved by means of the clamping piece 20212. The conductive part 2021 and the clamping piece 20212 are integrally formed. The space between the clamping piece 20212 and the conductive part 2021 is used to place the conductive end 1041. The clamping piece 20212 is also made of elastic conductive material, so the conductive end 1041 can also be pressed, thereby ensuring the conductive effect of the electrical connection.

[0045] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0046] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A terminal block for a drawer-type frame circuit breaker, comprising a plurality of static wiring terminals and a plurality of dynamic wiring terminals, the static wiring terminals and the dynamic wiring terminals are plug-fitted, the static wiring terminals are arranged in the same row to form a static module, and the dynamic wiring terminals are arranged in the same row to form a dynamic module, characterized in that: The movable module is arranged on a fixed bracket, the fixed bracket is made of insulating material, the fixed bracket is formed with a cavity for accommodating the movable terminal, one end of the cavity is formed with a first buckle groove on the mounting surface of the fixed bracket, the wiring side of the cavity is provided with a second buckle groove, the movable terminal is provided with locking buckles corresponding to the first buckle groove and the second buckle groove, and a fixing plate is arranged on the fixed bracket; the static terminal is arranged in a corresponding housing, the wiring side of the housing of the static terminal is provided with a wiring hole and a driving hole, and a driving member is arranged in the driving hole, The wiring hole and the driving hole are arranged side by side, and a rotating spring piece and an electrical connection plate are arranged in the static wiring terminal. The rotating end of the rotating spring piece is sleeved on a column formed in the static wiring terminal. When wiring, the driving member moves into the driving hole so that one end of the rotating spring piece is separated from the electrical connection plate to form a wiring space. When the wiring is completed, the driving member is reset under the self-restoring force of the rotating spring piece, and at the same time, the wire is pressed to realize the electrical connection between the wire and the electrical connection plate; the moving wiring terminal is arranged in a corresponding shell, and a moving contact is arranged in the shell of the moving wiring terminal. The two ends of the moving contact A conductive part is arranged on one side, the moving contact is inserted into the slot of the static wiring terminal, and conductive springs conductively connected to the conductive part are arranged on both sides of the slot, the conductive springs are clamped on both sides of the slot, and the ends of the conductive springs have conductive ends. When the moving contact is inserted into the slot, the conductive ends are squeezed to form an electrical connection with the conductive part; there is surface contact between the conductive ends and the conductive part, and a pressing piece is arranged on one side of the conductive spring close to the conductive end. When the conductive end is squeezed, the conductive end moves toward the pressing piece. In a natural state, the conductive end The electrical end is spaced a certain distance from the clamping piece, and when the conductive end is squeezed, the moving distance of the conductive end is greater than the distance between the conductive end and the clamping piece; or the conductive end and the conductive part are in surface contact, and a clamping piece is provided on the conductive part. In a natural state, there is a clamping distance between the clamping piece and the conductive part, and when the moving contact is inserted into the slot, the clamping piece contacts the conductive end, and when the moving contact is fully inserted, the conductive end is located in the space between the clamping piece and the conductive part, and is electrically connected to the clamping piece, wherein the thickness of the conductive end is greater than the clamping distance.

2. A terminal block for a drawer-type frame circuit breaker according to claim 1, characterized in that: A fixing plate is arranged on the mounting surface of the movable module close to the fixing bracket, and the fixing plate is inserted into a slot formed on the fixing bracket.

3. A terminal block for a drawer-type frame circuit breaker according to claim 1, characterized in that: The rotating spring also includes free ends arranged on both sides of the rotating end, the first free end is used to press the wire against one end of the electrical connection plate, and the second free end is separated from or in contact with one end of the electrical connection plate.

4. A terminal block for a drawer-type frame circuit breaker according to claim 1, characterized in that: The pressing piece is a sheet-like structure with elasticity.

5. The terminal block for a drawer-type frame circuit breaker according to claim 1, characterized in that: The clamping piece is a curved structure and is distributed at two ends of the conductive part.

6. A terminal block for a drawer-type frame circuit breaker according to claim 1, characterized in that: The side surface of the conductive part of the movable contact is provided with a protrusion, and the conductive part is correspondingly formed with a groove for cooperating with the protrusion to fix the conductive part on the movable contact.

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