Connection structure and circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a connecting structure and a circuit breaker. The connecting structure comprises a plurality of connecting assemblies, each connecting assembly comprises at least one first connecting piece and a second connecting piece, each first connecting piece comprises two first abutting arms arranged at intervals, and the distances between the two first abutting arms of different first connecting pieces are different; the second connecting piece is connected with the first connecting piece, and the second connecting piece comprises two second abutting arms which abut against each other; two first abutting arms of the other first connecting piece and / or two second abutting arms of the second connecting piece are arranged between the two first abutting arms of one first connecting piece; a cavity used for installation and contact with a movable contact knife is formed between each second abutting arm and the adjacent first abutting arm and / or between two adjacent first abutting arms. The connection structure is large in current-carrying area and relative current density, and can be suitable for the installation of two or more movable contact knives.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a connection structure and a circuit breaker. Background Art

[0002] In a plastic case circuit breaker, the moving contact blade and the thermal element need to be electrically connected via a connecting structure. Figures 1 to 3 As shown, the current connection structure includes a clip 1' and a clip 2', the clip 1' has a first abutment arm 11', the clip 2' has two second abutment arms 21', when the clip 2' is arranged on the clip 1', the first abutment arm 11' can form a cavity 3' with the adjacent second abutment arm 21', and then one end of the movable contact knife is installed in the cavity 3', and the thermal element is connected to the clip 2' by bolts, so as to realize the electrical connection between the movable contact knife and the thermal element.

[0003] However, if Figure 1 As shown, since the clip 1' has only one first abutting arm 11', the current carrying area of ​​the clip 1' is small, resulting in a large relative current density on the clip 1'; and, as shown in FIG. Figure 3 As shown, since the first clip 1' and the second clip 2' are connected to each other to form only two cavities 3', it is not suitable for the installation of more than two movable contact knives, resulting in poor applicability and versatility of the entire connection structure.

[0004] Therefore, there is an urgent need for a connection structure and a circuit breaker to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a connection structure and a circuit breaker, wherein the connection structure has a large current-carrying area and a large relative current density, and can be suitable for the installation of two or more moving contact knives.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A connection structure, comprising a plurality of connection components, each of which comprises:

[0008] At least one first connecting member, each of the first connecting members comprises two first abutting arms arranged at intervals, and the intervals between the two first abutting arms of different first connecting members are different;

[0009] A second connecting member connected to the first connecting member, wherein the second connecting member comprises two abutting second abutting arms;

[0010] The two first abutment arms of another first connecting member are arranged between the two first abutment arms of one of the first connecting members and / or the two second abutment arms of the second connecting member are arranged, and a cavity for installation and contact with the movable contact knife is formed between each second abutment arm and the adjacent first abutment arm and / or between two adjacent first abutment arms.

[0011] As an optional solution, the first connecting member further includes:

[0012] A first frame body, a first cavity is formed in the first frame body, a first opening connected to the first cavity is arranged on the first frame body, the first abutment arms are vertically connected to the opposite ends of the first frame body located at the first opening, and the space sizes of the first frames of different first connecting members are different, and the first frame of another first connecting member or the second connecting member is arranged in the first cavity of one of the first connecting members.

[0013] As an optional solution, the second connecting member further includes:

[0014] The second frame is arranged in the first cavity. A second cavity for installing a thermal element is formed in the second frame. A second opening communicating with the second cavity is provided on the second frame. The second abutment arms are vertically connected to both ends of the second frame at the second opening.

[0015] As an optional solution, the inner side wall of one of the first cavities contacts the first outer side wall of the other first frame or the second outer side wall of the second frame, and the first opening of one of the first connecting members allows the first abutment arm of the other first connecting member to pass through or allows the second abutment arm to pass through.

[0016] As an optional solution, when the inner side wall of one of the first cavities contacts the first outer side wall of another of the first frames or the second outer side wall of the second frame, the gap between the inner side wall of one of the first cavities and the first outer side wall of another of the first frames or the second outer side wall of the second frame is less than 1 mm.

[0017] As an optional solution, the connection structure further includes:

[0018] A support shaft, passing through the first abutment arm, the second abutment arm and the movable contact knife along the X-axis, and the movable contact knife can rotate around the support shaft;

[0019] At least one first elastic member is provided, wherein the first elastic member is sleeved on the end of the support shaft, and one end of the first elastic member abuts against the outer side surface of the first abutting arm located at the outermost side;

[0020] A fixing seat is fixedly mounted on the supporting shaft, and the other end of the first elastic member abuts against the fixing seat.

[0021] As an optional solution, the connection structure further includes:

[0022] The protective member is sleeved on the supporting shaft and abuts against the outer side surface of the first abutting arm located at the outermost side. One end of the first elastic member abuts against the protective member.

[0023] A circuit breaker comprises a movable contact blade, a thermal element and the connection structure as described above, wherein the connection structure is used for conductively connecting the movable contact blade and the thermal element.

[0024] As an optional solution, the circuit breaker further includes:

[0025] The outer shell has a plurality of cavities spaced apart therein, the first abutment arm and the second abutment arm in one of the connecting components are placed in one of the cavities, the two ends of the support shaft are respectively connected to the outer shell, and the movable contact knife can rotate around the X-axis relative to the outer shell.

[0026] As an optional solution, the circuit breaker further includes:

[0027] A pressing member, slidably connected to the outer shell along the Y axis, the pressing member comprising a working surface, a transition surface and a self-supporting surface arranged in sequence;

[0028] A second elastic member extending along the Y axis, one end of the second elastic member being connected to the outer shell, and the other end of the second elastic member being limitedly abutted against the pressing member;

[0029] A sliding shaft is provided on the movable contact knife along the X-axis and is tangentially abutted against the working surface. When the movable contact knife rotates along the first direction around the X-axis, the sliding shaft can be pressed against the working surface to compress the second elastic member. When the movable contact knife rotates along the second direction around the X-axis, the sliding shaft can move to the self-supporting surface in sequence through the working surface and the transition surface. The second direction is set at an obtuse angle to the first direction.

[0030] Beneficial effects:

[0031] The connection structure proposed by the utility model is provided with at least one first connection member and a second connection member used in conjunction with each other, and each first connection member includes two first abutting arms arranged at intervals, and the second connection member includes two abutting second abutting arms. When the second connection member is connected to the first connection member, two first abutting arms of another first connection member are arranged between the two first abutting arms of one first connection member and / or two second abutting arms of the second connection member are arranged, so that a contact for installation and contact with the movable contact knife is formed between each second abutting arm and the adjacent first abutting arm and / or between the two adjacent first abutting arms. A cavity is formed to realize a conductive connection between the movable contact knife and the first connector and the second connector; since the first connector includes two first abutment arms and the second connector includes two second abutment arms, the current-carrying area of ​​the first connector and the second connector is larger and the relative current density is larger; and since two or more cavities are formed between each second abutment arm and the adjacent first abutment arm and / or between two adjacent first abutment arms, two or more cavities can be formed in each connecting component, which can be suitable for the installation of two or more movable contact knives, thereby making the entire connecting structure more applicable and versatile.

[0032] The circuit breaker proposed in the utility model, because it includes the above-mentioned connection structure, can realize the conductive connection between the movable contact blade in the circuit breaker and the connection structure, and the current-carrying area of ​​the entire circuit breaker is large, and the applicability and versatility are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a clamp 1 in the prior art;

[0034] Figure 2 It is a structural schematic diagram of the second clamp in the prior art;

[0035] Figure 3 It is a schematic diagram of the assembly structure between the first clip and the second clip in the prior art;

[0036] Figure 4 It is a partial structural schematic diagram of the circuit breaker provided in the utility model;

[0037] Figure 5 It is a schematic diagram of the structure in which the movable contact knife provided in the utility model is connected to the cavity;

[0038] Figure 6 It is a schematic diagram of a structure in which two first connecting members are arranged outside a second connecting member provided in the utility model;

[0039] Figure 7 It is a schematic diagram of the structure in which four movable contact knives provided in the utility model are respectively installed in four cavities;

[0040] Figure 8 It is a structural schematic diagram of the movable contact knife provided in the utility model;

[0041] Fig. 9 It is a structural schematic diagram of the first connecting member provided in the utility model;

[0042] Fig.10 It is a structural schematic diagram of the second connecting member provided in the utility model;

[0043] Fig.11 It is a schematic diagram of the assembly structure in which the second connecting member provided in the utility model is connected to the first connecting member;

[0044] Fig.12 It is a structural schematic diagram of the first elastic member and the fixing seat (excluding a part of the structure of the fixing seat and a part of the structure of the outer shell) assembled on the end of the support shaft provided in the utility model;

[0045] Fig.13 It is a structural schematic diagram of the outer shell provided in the utility model;

[0046] Fig.14 It is a schematic diagram of the assembly structure of the pressing member and the second elastic member provided in the utility model;

[0047] Fig.15 It is a structural schematic diagram of the pressing member provided in the utility model.

[0048] In the figure:

[0049] 1', clip 1; 11', first abutment arm; 2', clip 2; 21', second abutment arm; 3', cavity;

[0050] 20. Moving contact knife; 201. First side surface; 202. Connecting shaft;

[0051] 30. outer shell; 301. matching groove; 302. mounting hole; 303. mounting groove;

[0052] 40, pressing member; 401, base plate; 4011, working surface; 4013, reinforcing rib; 402, connecting plate; 4021, self-supporting surface; 4022, transition surface; 403, mounting plate; 4031, through hole; 404, mounting shaft;

[0053] 50. a second elastic member;

[0054] 60. Sliding shaft;

[0055] 1. first connecting member; 11. first frame; 111. first cavity; 112. opening; 113. inner wall; 114. first outer wall; 115. first hole; 12. first abutting arm; 121. second side surface;

[0056] 2. second connecting member; 21. second frame; 211. second cavity; 212. second outer side wall; 214. second hole; 22. second abutting arm; 221. third side surface;

[0057] 3. Support shaft; 31. First elastic member; 32. Fixed seat; 33. Protective member;

[0058] 4. Cavity. DETAILED DESCRIPTION

[0059] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0060] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0062] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0063] In this embodiment, a connection structure and a circuit breaker including the connection structure are proposed. The circuit breaker also includes a moving contact blade and a thermal element. The connection structure is used to conductively connect the moving contact blade and the thermal element. The connection method is simple and convenient. The connection structure has a large current-carrying area and good structural compactness. It can be applied to the installation of two or more moving contact blades. Among them, the moving contact blade and the thermal element are common structures in existing circuit breakers. The specific working principles of the moving contact blade and the thermal element are not described in detail here.

[0064] Specifically, if Figures 4 to 11 As shown, the connection structure includes a plurality of connection components, each of which includes at least one first connection member 1 and one second connection member 2, each of which includes two first abutting arms 12 arranged at intervals, and the spacing between the two first abutting arms 12 of different first connection members 1 is different; the second connection member 2 includes two abutting second abutting arms 22; when the second connection member 2 is connected to the first connection member 1, two first abutting arms 12 of another first connection member 1 and / or two second abutting arms 22 of the second connection member 2 are arranged between the two first abutting arms 12 of one first connection member 1, so that a cavity 4 for installation and contact with the movable contact knife 20 is formed between each second abutting arm 22 and the adjacent first abutting arms 12 and / or between the two adjacent first abutting arms 12, that is, one end of the movable contact knife 20 is rotatably arranged in the cavity 4, and the first side surface 201 of the movable contact knife 20 is fitted and abutted with the inner cavity surface of the cavity 4 to realize the electrical connection between the movable contact knife 20 and the connection component, and the inner side of the second connection member 2 is used to install the thermal element. The first connecting member 1 and the second connecting member 2 are both made of conductive material, specifically copper.

[0065] Compared with the prior art, the connection structure in this embodiment changes the specific arrangement structure of the first connection member 1 and the second connection member 2; at least one first connection member 1 and one second connection member 2 are arranged to cooperate with each other, and each first connection member 1 includes two first abutting arms 12 arranged at intervals, and the second connection member 2 includes two abutting second abutting arms 22; when the second connection member 2 is connected to the first connection member 1, two first abutting arms 12 of another first connection member 1 are arranged between the two first abutting arms 12 of one first connection member 1 and / or two second abutting arms 22 of the second connection member 2 are arranged, so that each second abutting arm 22 is in contact with the adjacent first abutting arms 12 and / or the adjacent two first abutting arms 1 2, a cavity 4 for installation and contacting the movable contact knife 20 is formed therebetween, so as to realize the conductive connection between the movable contact knife 20 and the first connector 1 and the second connector 2; since the first connector 1 includes two first abutment arms 12 and the second connector 2 includes two second abutment arms 22, the current-carrying area of ​​the first connector 1 and the second connector 2 is larger and the relative current density is larger; and since two or more cavities 4 are formed between each second abutment arm 22 and the adjacent first abutment arms 12 and / or between two adjacent first abutment arms 12, two or more cavities 4 can be formed in each connecting component, which can be suitable for the installation of two or more movable contact knives 20, thereby making the entire connecting structure more applicable and universal.

[0066] It is worth noting that since the first connecting member 1 includes two first abutment arms 12 and the second connecting member 2 includes two second abutment arms 22, the left-right layout of the first connecting member 1 and the second connecting member 2 is more reasonable and compact, that is, the first connecting member 1 and the second connecting member 2 are respectively symmetrical structures, which is an asymmetrical structure with inconsistent left-right layouts of the clip 1' in the prior art. The occupied area of ​​the first connecting member 1 and the second connecting member 2 is more reasonable, thereby making the entire connecting structure more compact.

[0067] In this embodiment, Figure 4 and 5 As shown, a first connecting member 1 is provided on the outer side of the second connecting member 2 to form two cavities 4, so that two movable contact knives 20 can be installed at the same time. Figure 6 and Figure 7 As shown, two first connecting members 1 may be provided on the outside of the second connecting member 2, so that the above-mentioned cavity 4 is formed between the adjacent first abutting arms 12 and the second abutting arms 22, and between two adjacent first abutting arms 12, forming a total of four cavities 4, suitable for the simultaneous installation of four movable contact knives 20. Here, the specific number of the first connecting member 1 and the second connecting member 2 is not limited, and needs to be determined according to the actual number of movable contact knives 20.

[0068] It is worth noting that if Figures 8 to 11 As shown, the inner cavity surface of the cavity 4 mentioned above specifically refers to the second side surface 121 on the first abutting arm 12 and the third side surface 221 on the second abutting arm 22, that is, the two relative first side surfaces 201 on the movable contact knife 20 are respectively abutted to a second side surface 121 and a third side surface 221.

[0069] In the current connection structure, such as Figure 2 As shown, since the second abutting arm 21 ' of the second clip 2 ' is extended along the length direction of the second clip 2 ', the entire second clip 2 ' is longer and occupies a larger area, which is not conducive to the compactness of the entire connection structure.

[0070] In order to solve the above problems, in this embodiment, Fig. 9 As shown, the first connecting member 1 also includes a first frame body 11, in which a first cavity 111 for accommodating the second connecting member 2 is formed, and a first opening 112 communicating with the first cavity 111 is arranged on the first frame body 11, and the opposite ends of the first frame body 11 located at the first opening 112 are respectively vertically connected with first abutment arms 12 along the Z axis; and, the space sizes of the first frames 11 of different first connecting members 1 are different, so that the first frame body 11 of another first connecting member 1 or the second connecting member 2 is arranged in the first cavity 111 of one of the first connecting members 1.

[0071] Specifically, if Fig.10 As shown, the second connecting member 2 also includes a second frame body 21, which is arranged in the first cavity 111. A second cavity 211 for installing a thermal element is formed in the second frame body 21. A second opening communicating with the second cavity 211 is provided on the second frame body 21. The two ends of the second frame body 21 at the second opening are respectively vertically connected to second abutment arms 22 along the Z axis, so that the two second abutment arms 22 fit each other.

[0072] By connecting the first abutting arm 12 vertically to the first frame 11, that is, the first abutting arm 12 is not extended in the length direction (Y axis) of the first frame 11, but is extended along the Z axis, so that the length of the entire first connecting member 1 on the Y axis is shorter and the occupied area is smaller. Figure 4 As shown; correspondingly, by vertically connecting the second abutment arm 22 to the second frame 21, the entire second connecting member 2 can be made shorter in length on the Y-axis and occupy a smaller area, which is beneficial to the compactness of the entire connection structure.

[0073] It is worth noting that the two second abutting arms 22 on the second frame 21 can fit together to form an integral abutting arm, thereby forming two cavities 4 with the two first abutting arms 12 spaced apart on the first frame 11. Fig.10 and Fig.11 As shown, two movable contact knives 20 are respectively installed, and a connecting shaft 202 is connected between the two movable contact knives 20. Figure 4 shown.

[0074] Furthermore, if Figures 9 to 11 As shown, the inner side wall 113 of one of the first cavities 111 contacts the first outer side wall 114 of the other first frame 11 or the second outer side wall 212 of the second frame 21, and the first opening 112 of one of the first connecting members 1 allows the first abutting arm 12 of the other first connecting member 1 to pass through or allows the second abutting arm 22 to pass through, so that the second frame 21 can provide support for the first frame 11 or the first frame 11 located on the inner side provides support for the first frame 11 located on the outer side, ensuring that the structural strength of the first frame 11 and the second frame 21 is good, so that It is able to avoid the deformation of the first frame body 11 and the second frame body 21, and further avoid the first abutment arm 12 and the second abutment arm 22 from making a slight movement relative to the movable contact knife 20 due to the deformation of the first frame body 11 and the second frame body 21, thereby ensuring that the first abutment arm 12 and the second abutment arm 22 can always be tightly abutted against the movable contact knife 20, so that one side of the movable contact knife 20 is in good contact with the second side surface 121 of the first abutment arm 12 and the third side surface 221 of the second abutment arm 22, thereby ensuring a better electrical connection effect between the movable contact knife 20 and the connecting structure. Specifically, when the inner side wall 113 of one of the first cavities 111 contacts the first outer side wall 114 of the other first frame body 11 or the second outer side wall 212 of the second frame body 21, the gap between the inner side wall 113 of one of the first cavities 111 and the first outer side wall 114 of the other first frame body 11 or the second outer side wall 212 of the second frame body 21 is less than 1 mm, so that the gap after the above-mentioned contact is smaller, thereby ensuring the abutment tightness between the second frame body 21 and the first frame body 11, thereby better avoiding the deformation problem of the first frame body 11 and the second frame body 21, and further ensuring the good contact between the movable contact knife 20 and the first abutment arm 12 and the second abutment arm 22.

[0075] like Fig.11 As shown, since this embodiment includes only one first connecting member 1, that is, the inner wall 113 of the first cavity 111 is in contact with the second outer wall 212 of the second frame 21, and the first opening 112 of the first connecting member 1 is for the second abutment arm 22 to pass through, and the gap between the inner wall 113 of the first cavity 111 and the second outer wall 212 of the second frame 21 is less than 1 mm.

[0076] Specifically, if Figures 9 to 11 As shown, a first hole 115 and a second hole 214 are respectively provided at the bottom ends of the first frame 11 and the second frame 21, and bolts are connected to the first hole 115, the second hole 214 and the thermal element, which can not only install the thermal element on the first connecting member 1 and the second connecting member 2, but also align and fix the first frame 11 and the second frame 21 to ensure the accuracy of the connection position between the first frame 11 and the second frame 21.

[0077] Furthermore, if Figure 5 and Fig.12 As shown, the connection structure also includes a support shaft 3, a first elastic member 31 and a fixed seat 32; wherein the support shaft 3 passes through the first abutting arm 12, the second abutting arm 22 and the movable contact knife 20 along the X-axis, and the movable contact knife 20 can rotate around the X-axis on the support shaft 3; at least one of the first elastic member 31 and the fixed seat 32 is respectively provided, that is, the first elastic member 31 and the fixed seat 32 are provided on at least one end of the support shaft 3, the first elastic member 31 is sleeved on the end of the support shaft 3, and one end of the first elastic member 31 abuts against the outer side surface of the first abutting arm 12 located at the outermost side; the fixed seat 32 is fixedly installed on the support shaft 3, and the other end of the first elastic member 31 abuts against the fixed seat 32. In this embodiment, in order to ensure a better pressing effect, the first elastic member 31 and the fixed seat 32 are provided at both opposite ends of the support shaft 3, the first elastic member 31 can be specifically a compression spring, and the fixed seat 32 is specifically a shaft sleeve.

[0078] By setting a first elastic member 31 and a fixing seat 32 that cooperate with each other, the first elastic member 31 can be compressed by the limiting blocking effect of the fixing seat 32, so that the elastic force of the first elastic member 31 can press the first abutting arm 12 located at the outermost side along the X-axis, so that the first abutting arm 12, the second abutting arm 22 and the movable contact knife 20 can be abutted together, that is, the first elastic member 31 can provide mutual abutting pressure for the first abutting arm 12, the second abutting arm 22 and the movable contact knife 20, so that the abutment between the first abutting arm 12, the second abutting arm 22 and the movable contact knife 20 is tighter, and further the contact between the movable contact knife 20 and the first abutting arm 12 and the second abutting arm 22 is good, so as to better ensure the electrical connection effect between the movable contact knife 20 and the connecting structure.

[0079] Furthermore, if Fig.12As shown, the connection structure further includes a protective member 33, and the protective members 33 are respectively provided at the opposite ends of the support shaft 3. At one end of the support shaft 3, the protective member 33 is sleeved on the support shaft 3 and abuts against the outer side surface of the first abutting arm 12 located at the outermost side. One end of the first elastic member 31 abuts against the protective member 33, that is, the first elastic member 31 is limitedly abutted between the protective member 33 and the fixing seat 32. In this embodiment, the protective member 33 can be specifically a gasket.

[0080] By providing a protective member 33 on the outer side surface of the first abutment arm 12 located at the outermost side, the first elastic member 31 can be prevented from directly pressing against the first abutment arm 12 and damaging the first abutment arm 12, so that the first abutment arm 12 can be better protected, thereby avoiding the problem of unbalanced abutment pressure between the first abutment arm 12 and the movable contact knife 20 due to damage to the first abutment arm 12, thereby ensuring effective abutment between the first abutment arm 12 and the movable contact knife 20, and ensuring the connection effect between the movable contact knife 20 and the first connecting member 1.

[0081] Furthermore, if Figure 4 , Fig.12 and Fig.13 As shown, the circuit breaker also includes an outer shell 30, and both ends of the support shaft 3 are respectively connected to the outer shell 30. A plurality of cavities are arranged in the outer shell 30 at intervals. The first abutment arm 12 and the second abutment arm 22 in one connection assembly are placed in one cavity, and the movable contact blade 20 can rotate around the X axis relative to the outer shell 30. A matching groove 301 for installing the support shaft 3 is arranged in the outer shell 30. In this embodiment, the connection structure includes four connection assemblies, and correspondingly, four cavities are arranged in the outer shell 30, and four groups of movable contact blades 20 are arranged. One group of movable contact blades 20 is connected to one connection assembly, that is, one group of movable contact blades 20 includes two.

[0082] It is worth noting that the structures of the first connector 1 and the second connector 2 in this embodiment are basically located inside the outer shell 30, and will not protrude outward relative to the outer shell 30. On the one hand, the outer shell 30 can provide a certain protection for the first connector 1 and the second connector 2, and on the other hand, the compactness between the connection structure and the outer shell 30 is better, saving the layout space, so that the structure of the entire circuit breaker is more compact. In this embodiment, the outer shell 30 is an integrated structure, that is, a single outer shell 30 is arranged on four groups of connection components.

[0083] Furthermore, if Figure 12 to Figure 14As shown, the circuit breaker further includes a pressing member 40, a second elastic member 50 and a sliding shaft 60; wherein the pressing member 40 is slidably connected to the outer shell 30 along the Y axis, and the pressing member 40 includes a working surface 4011, a transition surface 4022 and a self-supporting surface 4021 arranged in sequence; the second elastic member 50 extends along the Y axis, one end of the second elastic member 50 is connected to the outer shell 30, and the other end of the second elastic member 50 is limitedly abutted to the pressing member 40; the sliding shaft 60 is penetrated along the X axis and connected to the movable contact blade 20 The second direction is set at an obtuse angle to the first direction, and the second direction is set at an obtuse angle to the first direction. The first direction is set at an obtuse angle to the second direction. Fig.12 The direction indicated by the arrow A in the figure, and the second direction is as follows Fig.12 The direction indicated by the arrow B in FIG. A mounting hole 302 is provided in the outer shell 30, and one end of the second elastic member 50 is limited in the mounting hole 302 to install the second elastic member 50 in the outer shell 30. In this embodiment, the second elastic member 50 can be a compression spring.

[0084] Specifically, the first direction is the rotation direction of the moving contact knife 20 towards the stationary contact knife. At this time, the circuit breaker is in a closed state; when the moving contact knife 20 rotates along the first direction, the moving contact knife 20 can drive the sliding shaft 60 to move in the direction away from the self-supporting surface 4021, that is, at this time the sliding shaft 60 moves on the working surface 4011, and due to the pressure between the sliding shaft 60 and the working surface 4011, the second elastic member 50 is compressed; correspondingly, the second elastic member 50 can provide a reaction force to the pressure member 40 and the sliding shaft 60, so as to push the moving contact knife 20 to closely contact the stationary contact knife, thereby ensuring the abutment stability and reliability between the moving contact knife 20 and the stationary contact knife.

[0085] When a short circuit occurs in the protection circuit, the electromagnetic force generated by the overcurrent causes the moving contact knife 20 to repel the static contact knife. At this time, the moving contact knife 20 rotates in the second direction. In the initial stage of the repulsion, the moving contact knife 20 drives the sliding shaft 60 to slide tangentially with the working surface 4011. When the moving contact knife 20 is repelled and rotated to a certain angle, the moving contact knife 20 drives the sliding shaft 60 to slide across the transition surface 4022 on the pressure piece 40 and enter the self-supporting surface 4021. At this time, the sliding shaft 60 stays on the self-supporting surface 4021 and no longer moves. The moving contact knife 20 is completely repelled from the static contact knife, so that the moving contact knife 20 can be self-supporting and quickly cut off the short-circuit current and disconnect the power supply. That is, the circuit breaker is in the open state at this time to achieve the protection effect.

[0086] Furthermore, if Fig.15As shown, the pressing member 40 is an integrated symmetrical structure, that is, the pressing function of the two moving contact knives 20 can be realized simultaneously by using one pressing member 40. Compared with the prior art that uses two independently arranged pressing members 40 corresponding to the two moving contact knives 20 respectively, it has a simple structure, low cost, saves installation space, and makes the entire circuit breaker more compact.

[0087] Specifically, if Fig.15 As shown, the pressing member 40 includes a base plate 401 and a connecting plate 402; wherein the second elastic member 50 is limitedly abutted against a side surface of the base plate 401; the connecting plate 402 is obliquely connected to the base plate 401, and the connecting plate 402 is inclined in a direction close to the second elastic member 50, and has a self-supporting surface 4021 on the connecting plate 402, and the connecting surface between the connecting plate 402 and the base plate 401 is a transition surface 4022, and has a working surface 4011 on the base plate 401. In order to correspond to the two movable contact knives 20, two connecting plates 402 are symmetrically connected on the base plate 401, respectively, so as to symmetrically form two working surfaces 4011, two transition surfaces 4022 and two self-supporting surfaces 4021 on the pressing member 40.

[0088] Specifically, a limiting boss is provided at one end of the substrate 401 where the working surface 4011 is not provided, and one end of the second elastic member 50 is sleeved on the limiting boss to ensure the stability of the second elastic member 50 on the substrate 401 and prevent the second elastic member 50 from running off the track during operation; and, reinforcing ribs 4013 are also provided on the substrate 401 to increase the structural strength of the entire pressure member 40.

[0089] Furthermore, if Figures 12 to 15 As shown, the pressing member 40 also includes a mounting plate 403, and the two ends of the substrate 401 that are relatively arranged along the X-axis are respectively bent and connected with the mounting plates 403, and a through hole 4031 is provided on the mounting plate 403, and mounting shafts 404 are passed through the two through holes 4031, and one end of the mounting shaft 404 that passes through the through hole 4031 is inserted into the mounting groove 303 extending along the Y-axis on the outer shell 30, and the mounting shaft 404 can move along the Y-axis in the through hole 4031 and the mounting groove 303 respectively, so as to drive the entire pressing member 40 to move along the Y-axis under the interaction of the sliding shaft 60 and the second elastic member 50, so as to avoid the pressing member 40 interfering with the movement of the sliding shaft 60 and the movable contact knife 20.

[0090] By setting the installation shaft 404, on the one hand, it can provide a guiding effect for the movement of the pressure piece 40 on the Y-axis, ensuring the guidance and reliability of the movement of the pressure piece 40 on the Y-axis; on the other hand, the pressure piece 40 can be supported and set in the outer shell 30 through the installation shaft 404 to provide a supporting effect on the pressure piece 40.

[0091] The specific assembly process of the circuit breaker in this embodiment is as follows, and a first connecting member 1 and a second connecting member 2 are provided:

[0092] First, the second frame 21 is set in the first cavity 111 of the first frame 11, so that the second abutment arm 22 passes through the first opening 112 and is located between the two first abutment arms 12, so that two cavities 4 are formed between the second abutment arm 22 and the two first abutment arms 12 respectively; and the inner wall 113 of the first cavity 111 is in contact with the second outer wall 212 of the second frame 21.

[0093] Then, connect the connecting shaft 202 between the two movable contact knives 20, and then insert one end of the two movable contact knives 20 into the two cavities 4 respectively; then pass the support shaft 3 through the first abutment arm 12, the second abutment arm 22 and the movable contact knife 20, and sequentially assemble the protective part 33, the first elastic part 31 and the fixed seat 32 on the end of the support shaft 3; then pass the sliding shaft 60 on the two movable contact knives 20; then cover the outer shell 30, and make the two end parts on the support shaft 3 respectively located in the two matching grooves 301 oppositely arranged in the outer shell 30.

[0094] Afterwards, one end of the second elastic member 50 is installed into the mounting hole 302 in the outer shell 30, and then the pressing member 40 is installed between the sliding shaft 60 and the second elastic member 50, and the limiting boss on the pressing member 40 is located in the second elastic member 50; at the same time, the sliding shaft 60 is tangent to the working surface 4011 on the base plate 401 of the pressing member 40; finally, the mounting shaft 404 is passed through the mounting groove 303 on the outer shell 30 and the through hole 4031 on the mounting plate 403 of the pressing member 40 in sequence to complete the installation process of the circuit breaker.

[0095] The connection structure in the present embodiment can reasonably utilize the space and ensure the compactness of the connection structure by providing the first connection member 1 and the second connection member 2 of symmetrical structures respectively; and can ensure that the current-carrying area on the connection structure is large; at the same time, it can avoid the first connection member 1 and the second connection member 2 occupying a long length on the Y-axis, so that the structure of the entire connection structure is more compact; and, through the mutual cooperation between the first connection member 1 and the second connection member 2, it can ensure that the abutment between the movable contact knife 20, the first abutment arm 12, and the second abutment arm 22 is relatively tight, ensuring good contact between the movable contact knife 20 and the connection structure; at the same time, at least one first connection member 1 and one second connection member 2 are provided, which can form two or more cavities 4, so that it can be suitable for the installation of two or more movable contact knives 20, so that the applicability and versatility of the connection structure are better.

[0096] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A connection structure, characterized in that: The invention comprises a plurality of connection components, each of which comprises: At least one first connecting member (1), each of the first connecting members (1) comprising two first abutting arms (12) arranged at intervals, and the intervals between the two first abutting arms (12) of different first connecting members (1) are different; A second connecting member (2) connected to the first connecting member (1), the second connecting member (2) comprising two abutting second abutting arms (22); Two first abutment arms (12) of another first connecting member (1) and / or two second abutment arms (22) of the second connecting member (2) are arranged between the two first abutment arms (12) of one of the first connecting members (1), and a cavity (4) for installation and contact with the movable contact knife (20) is formed between each second abutment arm (22) and an adjacent first abutment arm (12) and / or between two adjacent first abutment arms (12).

2. The connection structure according to claim 1, characterized in that: The first connecting member (1) further comprises: A first frame (11), wherein a first cavity (111) is formed in the first frame (11), and a first opening (112) communicating with the first cavity (111) is provided on the first frame (11), and the first abutment arms (12) are respectively vertically connected to opposite ends of the first frame (11) located at the first opening (112), and the space sizes of the first frames (11) of different first connecting members (1) are different, and the first frame (11) of another first connecting member (1) or the second connecting member (2) is provided in the first cavity (111) of one of the first connecting members (1).

3. The connection structure according to claim 2, characterized in that: The second connecting member (2) further comprises: The second frame (21) is arranged in the first cavity (111), a second cavity (211) for installing a thermal element is formed in the second frame (21), a second opening communicating with the second cavity (211) is provided on the second frame (21), and two ends of the second frame (21) located at the second opening are respectively vertically connected to the second abutting arms (22).

4. The connection structure according to claim 3, characterized in that: The inner side wall (113) of one of the first cavities (111) contacts the first outer side wall (114) of the other first frame (11) or the second outer side wall (212) of the second frame (21), and the first opening (112) of one of the first connecting members (1) allows the first abutment arm (12) of the other first connecting member (1) to pass through or allows the second abutment arm (22) to pass through.

5. The connection structure according to claim 4, characterized in that: When the inner side wall (113) of one of the first cavities (111) contacts the first outer side wall (114) of another of the first frames (11) or the second outer side wall (212) of the second frame (21), a gap between the inner side wall (113) of one of the first cavities (111) and the first outer side wall (114) of another of the first frames (11) or a gap between the inner side wall (113) of one of the first cavities (111) and the second outer side wall (212) of the second frame (21) is less than 1 mm.

6. The connection structure according to any one of claims 1 to 5, characterized in that: The connection structure also includes: A support shaft (3) passes through the first abutment arm (12), the second abutment arm (22) and the movable contact knife (20) along the X-axis, and the movable contact knife (20) is capable of rotating around the support shaft (3); At least one first elastic member (31) is provided, wherein the first elastic member (31) is sleeved on the end of the support shaft (3), and one end of the first elastic member (31) abuts against the outer side surface of the first abutting arm (12) located at the outermost side; A fixing seat (32) is fixedly mounted on the supporting shaft (3), and the other end of the first elastic member (31) abuts against the fixing seat (32).

7. The connection structure according to claim 6, characterized in that: The connection structure also includes: The protective member (33) is sleeved on the support shaft (3) and abuts against the outer side surface of the first abutting arm (12) located at the outermost side. One end of the first elastic member (31) abuts against the protective member (33).

8. A circuit breaker, characterized in that It comprises a movable contact blade (20), a thermal element and a connecting structure as claimed in any one of claims 1 to 7, wherein the connecting structure is used for conductively connecting the movable contact blade (20) and the thermal element.

9. The circuit breaker according to claim 8, characterized in that The circuit breaker further comprises: An outer shell (30) is provided with a plurality of cavities at intervals therein, the first abutment arm (12) and the second abutment arm (22) in one of the connecting components are placed in one of the cavities, the two ends of the support shaft are respectively connected to the outer shell (30), and the movable contact knife (20) can rotate around the X-axis relative to the outer shell (30).

10. The circuit breaker according to claim 9, characterized in that The circuit breaker further comprises: A pressing member (40) is slidably connected to the outer shell (30) along the Y axis, and the pressing member (40) includes a working surface (4011), a transition surface (4022) and a self-supporting surface (4021) which are arranged in sequence; A second elastic member (50) extends along the Y axis, one end of the second elastic member (50) is connected to the outer shell (30), and the other end of the second elastic member (50) is limitedly abutted against the pressing member (40); A sliding shaft (60) is provided on the movable contact knife (20) along the X-axis and is tangentially abutted against the working surface (4011). When the movable contact knife (20) rotates along the X-axis in a first direction, the sliding shaft (60) can be pressed against the working surface (4011) to compress the second elastic member (50). When the movable contact knife (20) rotates along the X-axis in a second direction, the sliding shaft (60) can move to the self-supporting surface (4021) in sequence through the working surface (4011) and the transition surface (4022), and the second direction is set at an obtuse angle to the first direction.

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