Main branch connector for micro inverter and connecting structure

Abstract

The utility model discloses a main and branch connector for a micro inverter and a connecting structure, the main and branch connector comprises a housing with a mounting cavity and three connecting terminals fixedly arranged in the mounting cavity, and the housing comprises a main body part and three connecting plugs; each connecting terminal comprises a connecting part and three pins which are electrically connected, and the three pins of each connecting terminal are respectively arranged in the three connecting plugs; the at least two connecting plugs, the main body part and the three connecting terminals are integrally formed; the main branch connecting structure further comprises a second connector with a connector. A locking mechanism is arranged between at least one connecting plug and the connector, the locking mechanism comprises a locking piece rotationally arranged around the axis of one of the connecting plug and the connector, the locking piece can be rotated to drive the locking mechanism to be converted into a locking state, the locking operation is simple, and the locking effect is good. And the stability and the safety are higher.

Description

Technical Field

[0001] The utility model relates to a total and branch wire connector and a connection structure for a micro-inverter. Background Art

[0002] The total and branch wire connector for an inverter refers to a special connector used in an inverter system to connect one or more main power supply lines (bus lines) to branch into multiple independent output lines (branch lines). Since multiple lines need to be connected, the connection terminals in the connector have multiple pins, and the multiple pins are angled with each other, which increases the difficulty of assembling the connection terminals into the connector housing. Existing total and branch wire connectors usually divide the housing and the connection terminals into multiple modules and assemble them to install the connection terminals into the connector housing. This not only has a large assembly difficulty and consumes time, but also increases the structural complexity of the total and branch wire connector, and at the same time affects the stability of the connector after assembly. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a new total and branch wire connector for a micro-inverter.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a total and branch wire connector for a micro-inverter, the total and branch wire connector includes a housing with an installation cavity, and three connection terminals fixedly arranged in the installation cavity and spaced from each other. The housing includes a main body portion and three plug connectors spaced along the circumferential side of the main body portion; each connection terminal includes a connection portion and three pins spaced along the circumferential side of the connection portion. The connection portion is electrically connected to the pins. The three pins of each connection terminal are respectively arranged in the three plug connectors; the main body portion and the three connection terminals are integrally formed.

[0005] In some embodiments, the housing and the three connection terminals are integrally formed.

[0006] In some embodiments, at least one of the plug connectors, the main body portion, and the three connection terminals is integrally formed.

[0007] In some embodiments, the three plug connectors include two first plug connectors extending along the same length direction, and a second plug connector whose extension direction is perpendicular to the extension direction of the first plug connectors. The three plug connectors are located in the same plane, so that the housing is in a T shape; the two first plug connectors, the main body portion, and the three connection terminals are integrally formed, and the second plug connector is detachably connected to the main body portion.

[0008] In some embodiments, the three connection terminals are respectively a live wire terminal, a neutral wire terminal, and a ground wire terminal. The three pins of the live wire terminal are all live wire pins, the three pins of the neutral wire terminal are all neutral wire pins, and the three pins of the ground wire terminal are all ground wire pins. One live wire pin, one ground wire pin, and one neutral wire pin are arranged at intervals in each plug connector.

[0009] In some embodiments, the three pins of each connection terminal include a first pin extending along the same length direction and a second pin whose extending direction is perpendicular to that of the first pin. The three pins are located in the same plane, such that the connection terminal is in a T shape.

[0010] Another object of the present utility model is to provide a main and branch wire connection structure for a micro-inverter.

[0011] To achieve the above object, the technical solution adopted by the present utility model is: a main and branch wire connection structure for a micro-inverter, including the above-mentioned main and branch wire connector. The main and branch wire connection structure further includes a second connector having a connection head. When the main and branch wire connector is cooperatively connected with the second connector, the connection head is axially cooperatively inserted into the plug connector. A locking mechanism is provided between at least one plug connector and the connection head. The locking mechanism includes a locking member rotatably arranged on one of the plug connector and the connection head around the axis of one of them. The locking member is configured to be able to drive the locking mechanism to be converted into a locked state by rotation.

[0012] In some embodiments, the locking mechanism includes a first locking mechanism for restricting the displacement of the plug connector and the connection head along the axial direction of the connection head. The first locking mechanism includes a first limiting member fixedly arranged on the other of the plug connector and the connection head. The locking member has a first position and a second position relative to the first limiting member. When the locking member is in the first position, the first locking mechanism is in a locked state. When the locking member is in the second position, the first locking mechanism is in an unlocked state. A second locking mechanism is further provided between the locking member and the plug connector or between the locking member and the connection head for restricting the relative rotation between the first limiting member and the locking member. When the locking member is in the first position, the second locking mechanism is in a locked state.

[0013] In some embodiments, a limiting groove extending in a first direction is provided on the locking member. The first direction is perpendicular to the axial direction of the connection head. When the locking member is in the first position, the first limiting member is located in the limiting groove. When the locking member is in the second position, the first limiting member disengages from the limiting groove.

[0014] In some embodiments, a guiding groove extending in a second direction is provided on the locking member. The second direction is parallel to the axial direction of the connecting head. The guiding groove communicates with the limiting groove. Along the direction approaching the limiting groove, the notch of the guiding groove gradually becomes smaller. When the first limiting member is located in the guiding groove, the locking member is in the second position.

[0015] In some embodiments, the locking member is annular and sleeved on the connecting head. The second locking mechanism includes a first blocking structure and a second blocking structure provided on the locking member, and a first mating structure and a second mating structure provided on the plug connector. The first blocking structure and the second blocking structure are arranged at intervals along the circumferential direction of the locking member. When the locking member is in the first position, the first blocking structure blocks the rotation path of the first mating structure, and the second blocking structure blocks the rotation path of the second mating structure. Along the circumferential direction of the locking member, the first mating structure and the second mating structure are located between the first blocking structure and the second blocking structure.

[0016] In some embodiments, one side portion of the first limiting member constitutes the first mating structure. A second limiting member is provided on the plug connector. The second limiting member protrudes outwardly from the outer circumferential portion of the plug connector. One side portion of the second limiting member constitutes the second mating structure. A limiting groove extending in a first direction is provided on the locking member. The first direction is perpendicular to the axial direction of the connecting head. Along the first direction, the groove wall on one side of the limiting groove constitutes the first blocking structure. A limiting protrusion extending radially inwardly along the locking member is provided on the locking member. The second blocking structure is provided on the limiting protrusion.

[0017] In some embodiments, an elastic member and a through groove communicating the inner and outer sides of the locking member are provided on the locking member. The elastic member has a fixed end and a free end. The fixed end is fixedly connected to the side wall of the through groove. The free end is arranged to be movable along the radial direction of the locking member. The limiting protrusion is fixedly provided on the free end.

[0018] In some embodiments, the limiting protrusion has a first state and a second state. In the first state, the limiting protrusion blocks the rotation path of the second limiting member. In the second state, along the radial direction of the locking member, the limiting protrusion extends out of the through groove to the outside of the locking member. A driving structure is provided between the second limiting member and the limiting protrusion. The driving structure is configured to drive the limiting protrusion to switch to the second state when the locking member switches to the first position.

[0019] In some embodiments, the driving structure includes a first driving surface disposed on the second limiting member and a second driving surface disposed on the limiting protrusion. The first driving surface and the second engaging structure are disposed on opposite sides of the second limiting member, and the second driving surface and the second blocking structure are disposed on opposite sides of the limiting protrusion. The first driving surface extends from the outside to the inside and away from the second engaging structure along the radial direction of the plug connector, and the second driving surface extends from the inside to the outside and away from the second blocking structure along the radial direction of the locking member.

[0020] In some embodiments, the locking member is annular and is sleeved on the connector head in a relatively rotatable manner, and an annular connection groove is formed between the locking member and the connector head; the plug connector includes an annular plugging portion, the pins are located inside the plugging portion and are spaced apart from the plugging portion, and the first limiting member protrudes outwardly from the outer peripheral portion of the plugging portion. When the total wire splitter connector is cooperatively connected with the second connector, the plugging portion and the first limiting member are inserted into the connection groove.

[0021] In some embodiments, the locking member is detachably disposed on the connector head.

[0022] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: The total wire splitter connector for a micro-inverter of the present utility model has a housing including a main body portion and three plug connectors. Among them, the main body portion of the total wire splitter connector and the three connection terminals are integrally formed, thus solving the problem of difficult assembly of the connection terminals, simplifying the assembly operation of the total wire splitter connector, and improving the stability of the total wire splitter connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 is a schematic diagram of the total wire connection structure of a specific embodiment of the present utility model;

[0024] Attached Figure 2 is a partial exploded view of the attached Figure 1 ;

[0025] Attached Figure 3 is a three-dimensional structural schematic diagram of the total wire splitter connector of this embodiment;

[0026] Attached Figure 4 is a schematic diagram from another perspective of the attached Figure 3 ;

[0027] Attached Figure 5 is a right view of the attached Figure 3 ;

[0028] Attached Figure 6Stereoscopic schematic diagram of the main and branch line connector of this embodiment after removing the second plug;

[0029] Appendix Figure 7 Stereoscopic schematic diagram of the second plug of this embodiment;

[0030] Appendix Figure 8 Stereoscopic structural schematic diagram of the connection terminal of this embodiment;

[0031] Appendix Figure 9 Is the appendix Figure 8 Exploded schematic diagram of the connection terminal in the appendix;

[0032] Appendix Figure 10 Stereoscopic structural schematic diagram of the second connector of this embodiment;

[0033] Appendix Figure 11 Is the appendix Figure 10 Stereoscopic diagram after removing the locking member;

[0034] Appendix Figure 12 Is the appendix Figure 10 Stereoscopic structural schematic diagram of the locking member in the appendix;

[0035] Appendix Figure 13 Is the appendix Figure 12 Stereoscopic diagram from another perspective;

[0036] Appendix Figure 14 Is the sectional view along the A-A direction in the appendix Figure 1 in the appendix;

[0037] Wherein: 100, main and branch line connector; 101, housing; 102, connection terminal; 102a, live wire terminal; 102b, ground wire terminal; 102c, neutral wire terminal; 1, main body part; 10, insertion slot; 11, first card slot; 12, groove; 2, plug; 2A, first plug; 2B, second plug; 21, plugging part; 211, first insertion part; 22, installation part; 221, second slot; 23, clamping part; 24, convex rib; 25, second card slot; 26, sealing ring; 3, connection part; 31, avoidance slot; 4, pin; 4A, first pin; 4B, second pin; 4a, live wire pin; 4b, ground wire pin; 4c, neutral wire pin; 5, first limiting member; 51, first matching structure; 6, locking member; 61, limiting slot; 611, first blocking structure; 62, guiding slot; 63, elastic member; 64, through slot; 65, limiting protrusion; 651, second blocking structure; 652, second driving surface; 7, second limiting member; 71, second matching structure; 72, first driving surface; 200, second connector; 201, connector main body; 202, connection head; 203, socket; 204, second insertion part; 205, first slot; 206, connection slot; 300, third connector; 301, engaging member. Detailed implementation mode

[0038] The technical solution of the present utility model will be elaborated in detail below in conjunction with the attached drawings and specific embodiments, so that the advantages and features of the present utility model are more easily understood by those skilled in the art. Obviously, the described implementation modes of this application are only part of the implementation modes of this application, rather than all of them. All other implementation modes obtained by those skilled in the art based on the implementation modes in this application without creative work belong to the scope of protection of this application.

[0039] Embodiment 1

[0040] See Figure 1 A total-branch wire connection structure for a micro-inverter shown, including a total-branch wire connector 100. The total-branch wire connector 100 includes a housing 101 having an installation cavity, and three connection terminals 102 fixedly arranged in the installation cavity and spaced from each other. Each connection terminal 102 includes a connection portion 3 and three pins 4 spaced along the circumference of the connection portion 3. The pins 4 are electrically connected to the connection portion 3. The housing 101 includes a main body portion 1 and three plug connectors 2 spaced along the circumference of the main body portion 1. The three pins 4 of each connection terminal 102 are respectively arranged in the three plug connectors 2. The main body portion 1 and the three connection terminals 102 are integrally formed, thus simplifying the assembly operation of the total-branch wire connector 100 and improving the stability of the total-branch wire connector 100 at the same time.

[0041] Specifically, the three connection terminals 102 are respectively a live wire terminal 102a, a ground wire terminal 102b and a neutral wire terminal 102c. The three pins of the live wire terminal 102a are all live wire pins 4a, the three pins of the ground wire terminal 102b are all ground wire pins 4b, and the three pins of the neutral wire terminal 102c are all neutral wire pins 4c. One live wire pin 4a, one ground wire pin 4b and one neutral wire pin 4c are spaced in each plug connector 2.

[0042] In this embodiment, the plug connector 2 has an annular plugging portion 21, and the pin 4 is located in the plugging portion 21 and is spaced from the plugging portion 21. In this embodiment, the plug connector 2 further has an installation portion 22 located in the plugging portion 21. There is a gap between the installation portion 22 and the plugging portion 21, and the pin 4 is located in the installation portion 22. Specifically, the installation cavity includes a first chamber located in the main body portion 1 and a second chamber provided in the installation portion 22 and communicating with the first chamber. The connection portion 3 is located in the first chamber, and the pin is located in the second chamber. See Figure 5As shown, each installation part 22 has three second chambers distributed at intervals, and the live pin 4a, the ground pin 4b, and the neutral pin 4c are respectively inserted into the three second chambers. The setting of the installation part 22 improves the stability of the pins 4 in the plug connector 2. At the same time, the installation part 22 is made of insulating material, and the installation part 22 separates the three pins 4 to ensure that the three pins 4 do not contact each other, guaranteeing insulation safety.

[0043] In this embodiment, referring to Figure 3 、 Figure 4 As shown, the three plug connectors 2 include two first plug connectors 2A extending along the same length direction, and a second plug connector 2B whose extending direction is perpendicular to the extending direction of the first plug connector 2A. The three plug connectors 2 are located in the same plane, and the three plug connectors 2 and the main body part 1 together form a T-shaped housing 101. Referring to Figure 8 As shown, the three pins 4A of each connection terminal 102 include two first pins 4A extending along the same length direction, and a second pin 4B whose extending direction is perpendicular to the extending direction of the first pin 4A. The three pins 4 are located in the same plane, and the three pins 4 and the connection part 3 together form a T-shaped connection terminal 102. The three T-shaped connection terminals are arranged parallel to each other, and the three pins 4 in each plug connector 2 are parallel to each other. In this embodiment, the three pins 4 in each plug connector 2 are distributed in a triangular shape. In other embodiments, the three pins 4 can be distributed in other shapes. In this embodiment, the connection part 3 is provided with an avoidance groove 31 to avoid contacting other connection terminals 102, for ensuring insulation safety.

[0044] In some embodiments, the housing 101 and the three connection terminals 102 are integrally formed, without assembly operations, and the production and manufacturing are simpler. When the port of the pin 4 is a female head, the end of the pin 4 is hollow, and it is impossible to use an integral molding process to manufacture it and the plug connector 2 together. Therefore, in some embodiments, at least one plug connector 2, the main body part 1, and the three connection terminals 102 are integrally formed. Specifically, in the main and branch line connector 100, part of the plug connectors 2 are manufactured separately, and the rest are integrally formed, and then the separately provided plug connectors 2 are fixed on the integrally formed part. In this way, while simplifying the production and assembly operations, the normal function can also be ensured.

[0045] In this embodiment, the two first plug connectors 2A, the main body part 1, and the three connection terminals 102 are integrally formed, the second plug connector 2B is detachably connected to the main body part 1, and the port of the second pin 4B is a female head. Specifically, referring to Figure 6 、 Figure 7As shown, a clamping portion 23 protruding outward is provided on the outer side of the second plug connector 2B, and an insertion groove 10 is provided on the main body portion 1. A first clamping groove 11 is provided on the groove wall of the insertion groove 10. When the second plug connector 2B is connected to the main body portion 1 in a matching manner, one side portion of the second plugging portion 2B is inserted into the insertion groove 10, and the clamping portion 23 is inserted into the first clamping groove 11. See Figure 8 , Figure 9 As shown, one end of the second pin 4B is a female head, and the other end of the second pin 4B is plugged into the connecting portion 3.

[0046] In this embodiment, a sealing ring 26 is provided on the second plugging portion 2B. When the second plugging portion 2B is inserted into the first clamping groove 11, the sealing ring 26 is located between the second plugging portion 2B and the groove wall of the first clamping groove 11, thereby forming a seal. In this embodiment, a convex rib 24 protruding outward is provided on the outer side of the second plugging portion 2B, and a groove 12 is provided on the groove wall of the first clamping groove 11. When the second plug connector 2B is connected to the main body portion 1 in a matching manner, the convex rib 24 is correspondingly inserted into the groove 12. The cooperation between the convex rib 24 and the groove 12 provides guidance for the connection between the second plug connector 2B and the main body portion 1. At the same time, the convex rib 24 and the groove 12 can also play an anti-fooling role. In this embodiment, a plurality of convex ribs 24 are provided at intervals along the outer peripheral portion of the second plugging portion 2B, and the plurality of convex ribs 24 are asymmetrically arranged. A plurality of grooves 12 are also correspondingly provided in the main body portion 1. Such a setting can prevent errors in the direction during assembly.

[0047] See Figure 2 As shown, the total sub-line connection structure further includes a second connector 200. The second connector 200 has a connection head 202. When the total sub-line connector 100 is connected to the second connector 200 in a matching manner, the connection head 202 is axially plugged into the plug connector 2. Specifically, the second connector 200 is a three-core connector, which is provided with three sockets 203 corresponding to the three pins 4 for plugging, or three plugs corresponding to the three female head pins for plugging. When the total sub-line connector 100 is connected to the second connector 200 in a matching manner, the pin 2 is plugged into the socket 203 correspondingly or the female head pin is plugged into the plug correspondingly, so as to realize the electrical connection between the total sub-line connector 100 and the second connector 200.

[0048] When the plug connector 2 is plugged into the connection head 202 correspondingly, since the pin 2 is plugged into the socket 203 correspondingly, or the female head pin 4 is plugged into the plug correspondingly, the plug connector 2 and the connection head 202 cannot rotate relative to each other. In this embodiment, a structure for improving the plugging stability and accuracy between the plug connector 2 and the connection head 202 is further provided. Specifically, see Figure 5 As shown, a first insertion portion 211 protruding inward is provided on the inner side wall of the plugging portion 21, and a second insertion slot 221 communicating with the second chamber and the gap between the mounting portion 22 and the plugging portion 21 is provided on the mounting portion 22.Figure 10 , Figure 11 As shown in Figure 11 , a first slot 205 recessed inward is provided on the outer portion of the second connector head 202. The sockets 203 are spacedly arranged within the connector head 202. The second connector 200 further includes a second insertion portion 204, and the second insertion portion 204 is connected between the socket 203 and the connector head 202. Refer to Figure 14 As shown in Figure 14 , when the plug connector 2 is correspondingly plugged into the connector head 202, the first insertion portion 211 is correspondingly inserted into the first slot 205, and the second insertion portion 204 is correspondingly inserted into the second slot 211. Through the mutual cooperation between the first insertion portion 211 and the first slot 205, and the mutual cooperation between the second insertion portion 204 and the second slot 211, while improving the plugging stability and accuracy between the plug connector 2 and the connector head 202, the relative rotation between the two is further restricted.

[0049] In this embodiment, a locking mechanism is provided between at least one plug connector 2 and the connector head 202. The locking mechanism includes a locking member 6 rotatably arranged on one of the plug connector 2 and the connector head 202 around the axis of one of them. By rotating the locking member, the locking mechanism can be driven to be converted into a locked state, and the locking operation is simple.

[0050] In this embodiment, the locking mechanism includes a first locking mechanism, which is used to restrict the displacement of the plug connector 2 and the connector head 202 along the axial direction of the connector head 202. In addition to the locking member 6, the first locking mechanism further includes a first limiting member 5 fixedly arranged on the other of the plug connector 2 and the connector head 202. The locking member 6 has a first position and a second position that can be switched by rotation. When the locking member 6 is in the first position, the first locking mechanism is in the locked state. At this time, the first locking mechanism locks the total wire connector 100 and the second connector 200 that are axially plugged together. When the locking member 6 is in the second position, the first locking mechanism is in the unlocked state. By driving the locking member 6 to rotate, the first locking mechanism can be driven to lock, and the locking operation is simple.

[0051] A second locking structure is further provided between the locking member 6 and the plug connector 2 or between the locking member 6 and the connection head 202, which is used to limit the relative rotation between the first limiting member 5 and the locking member 6 and prevent the locking member 6 from switching to the second position. At the same time, by restricting the relative rotation between the first limiting member 5 and the locking member 6, the relative rotation between the locking member 6 and the plug connector 2 can be restricted, thereby realizing the locking of the plug connector 2 and the connection head 202. Under the combined action of the first locking mechanism and the second locking mechanism, the master-slave line connector 100 and the second connector 200 can be stably locked together. When the locking member 6 is in the first position and the second locking mechanism is also in the locked state, the second locking mechanism keeps the first locking mechanism in the locked state at this time. By driving the locking member 6 to rotate, the first locking mechanism and the second locking mechanism can be locked synchronously, and the locking operation is simple. When it is necessary to release the lock between the master-slave line connector 100 and the second connector 200, the locking member 6 needs to be rotated in the reverse direction. Compared with locking along the axial direction by a buckle, the risk of accidental unlocking is reduced, and the first locking mechanism and the second locking mechanism are not easily affected when in the locked state, so the safety performance is higher.

[0052] In this embodiment, the locking member 6 is annular and is sleeved on the connection head 202 in a relatively rotatable manner. An annular connection groove 206 is formed between the locking member 6 and the connection head 202. The first limiting member 5 protrudes outward from the outer peripheral portion of the insertion portion 21. When the master-slave line connector 100 and the second connector 200 are connected in cooperation, the insertion portion 21 and the first limiting member 5 are inserted into the connection groove 206. Compared with exposing the locking structure on the outside, it is more beautiful and safer.

[0053] In this embodiment, the second connector 200 includes a connector body 201. The connection head 202 is fixed to one end of the connector body 201. The cross-sectional dimension of the connection head 202 is smaller than that of the connector body 201. The outer side surface of the locking member 6 is smoothly connected to the outer side surface of the connector body 201, which increases the aesthetics and also has a certain function of reducing accidental touch.

[0054] In some embodiments, the first locking mechanism includes a limiting structure fixedly arranged on the inner side wall of the locking member 6. When the locking member 6 is in the first position, the limiting structure blocks the path of the axial movement of the first limiting member 5. Specifically, along the axial direction of the connector head 202, the limiting structure blocks the side of the first limiting member 5 close to the main sub-line connector 100; when the locking member 6 is in the second position, along the axial direction of the connector head 202, the limiting structure and the first limiting member 5 are staggered from each other. By restricting the displacement between the first limiting member 5 and the locking member 6, the axial displacement between the main sub-line connector 100 and the second connector 200 is restricted. In this embodiment, a limiting groove 61 extending in a first direction is recessed on the inner side wall of the locking member 6, and the first direction is perpendicular to the axial direction of the connector head 202. When the locking member 6 is in the first position, the first limiting member 5 is located in the limiting groove 61. Along the axial direction of the connector head 202, the groove wall of the limiting groove 61 on the side close to the main sub-line connector 100 constitutes the above-mentioned limiting structure. When the locking member 6 is in the second position, the first limiting member 5 disengages from the limiting groove 61, and the first limiting member 5 can move axially relative to the locking member 6, so that the main sub-line connector 100 and the second connector 200 can be plugged or separated.

[0055] In this embodiment, a guiding groove 62 extending in a second direction is recessed on the inner side wall of the locking member 6, and the second direction is parallel to the axial direction of the connector head 202. The guiding groove 62 communicates with the limiting groove 61. The guiding groove 62 is used to guide the first limiting member 5 to move towards the limiting groove 61. During the connection process of the main sub-line connector 100 and the second connector 200, the first limiting member 5 moves along the guiding groove 62. When the plug connector 2 and the connector head 202 are axially butted, only by rotating the locking member 6 in a certain direction by a certain angle, the first limiting member 5 can be driven into the limiting groove 61. At the same time, when the first limiting member 5 is located in the guiding groove 62, the locking member 6 is switched to the second position. Specifically, when unlocking the first locking mechanism, rotate it in the reverse direction by a certain angle. When the first limiting member 5 contacts the groove wall of the guiding groove 62, it indicates that the first limiting member 5 has disengaged from the limiting groove 61 and entered the guiding groove 62. At this time, the main sub-line connector 100 and the second connector 200 can be axially separated.

[0056] In this embodiment, along the direction close to the limiting groove 61, the notch of the guiding groove 62 gradually becomes smaller, which is convenient for the first limiting member 5 to enter the guiding groove 62 and accurately reach the port of the limiting groove 61. Refer to Figure 12 As shown, along the direction extending towards the limiting groove 61, the two side walls of the guiding groove 62 extend obliquely towards each other in a V shape, which improves the movement guiding effect on the first limiting member 5.

[0057] In some embodiments, the second locking mechanism is disposed between the locking member 6 and the plug connector 2. By locking the locking member 6 and the plug connector 2, the conversion of the locking member 6 to the second position is prevented. Specifically, the second locking mechanism includes a first blocking structure 611 and a second blocking structure 651 disposed on the inner sidewall of the locking member 6, and a first mating structure 51 and a second mating structure 71 disposed on the plugging portion 21. The first blocking structure 611 and the second blocking structure 651 are circumferentially spaced apart along the locking member 6. When the locking member 6 is in the first position, the first blocking structure 611 blocks the rotation path of the first mating structure 51, and the second blocking structure 651 blocks the rotation path of the second mating structure 71. Along the circumference of the locking member 6, the first mating structure 51 and the second mating structure 71 are located between the first blocking structure 611 and the second blocking structure 651. Through the cooperation between the first blocking structure 611 and the first mating structure 51, and the cooperation between the second blocking structure 651 and the second mating structure 71, the rotation of the locking member 6 relative to the plugging portion 21 in two directions is restricted, so that the locking member 6 cannot be converted to the second position, and the first limiting member 5 is prevented from disengaging from the limiting groove 61.

[0058] In this embodiment, one side portion of the first limiting member 5 constitutes the first mating structure 51. Along the first direction, the groove wall on one side of the limiting groove 61 constitutes the first blocking structure 611. When the locking member 6 is in the first position, through the cooperation between the limiting groove 61 and the first limiting member 5, not only the displacement of the first limiting member 5 and the locking member 6 along the axial direction of the connecting head 202 is restricted, but also the rotation of the locking member 6 relative to the first limiting member 5 in one direction is restricted. Specifically, when the locking member 6 rotates along the first rotation direction, it is converted to the first position. The limiting groove 61 and the first limiting member 5 can limit the rotation angle of the locking member 6 along the first rotation direction, so that the locking member 6 is stabilized in the first position.

[0059] In this embodiment, a second limiting member 7 is provided on the plug connector 2. The second limiting member 7 protrudes outward from the outer peripheral portion of the plugging portion 21. One side portion of the second limiting member 7 constitutes the second mating structure 71. A limiting protrusion 65 extending radially inward is provided on the inner sidewall of the locking member 6. The second blocking structure 651 is disposed on the limiting protrusion 65. When the second limiting member 7 abuts against the limiting protrusion 65, the rotation of the locking member 6 along the second rotation direction opposite to the first rotation direction can be prevented, thereby avoiding the conversion of the locking member 6 to the second position.

[0060] In a preferred embodiment, when the locking member 6 is in the first position, the first blocking structure 611 abuts against the first mating structure 51, and the second blocking structure 651 abuts against the second mating structure 71. At this time, the axial movement and rotation of the locking member 6 are both restricted, and the locking member 6 cannot move and is completely locked, improving the stability of the locking member 6 and the second locking mechanism.

[0061] In this embodiment, an elastic member 63 is provided on the locking member 6, and a through groove 64 communicating with the inner and outer sides of the locking member 6. The elastic member 63 has a fixed end and a free end. Among them, the fixed end is fixedly connected to the side wall of the through groove 64, and the free end is movably arranged along the radial direction of the locking member 6. The limiting protrusion 65 is fixedly arranged at the free end. The limiting protrusion 65 has a first state and a second state. In the first state, the limiting protrusion 65 blocks the rotation path of the second limiting member 7; in the second state, along the radial direction of the locking member 63, the limiting protrusion 65 extends out of the through groove 64 to the outside of the locking member 6, so that the second limiting member 7 can move from one side of the limiting protrusion 65 to the other side. A driving structure is provided between the second limiting member 7 and the limiting protrusion 65. When the locking member 6 is converted to the first position, the driving structure can drive the limiting protrusion 65 to be converted to the second state, so that the limiting protrusion 65 exits from the rotation path of the second limiting member 7.

[0062] In this embodiment, as shown in Figure 13 As shown, the driving structure includes a first driving surface 72 provided on the second limiting member 7 and a second driving surface 652 provided on the limiting protrusion 65. The first driving surface 72 and the second matching structure 71 are respectively arranged on different sides of the second limiting member 7, and the second driving surface 652 and the second blocking structure 651 are respectively arranged on different sides of the limiting protrusion 65. The first driving surface 72 extends along the radial direction of the plug joint 2 from the outside to the inside and away from the second matching structure 71, and the second driving surface 652 extends along the radial direction of the locking member 6 from the inside to the outside and away from the second blocking structure 651. During the process that the locking member 6 rotates around the axis of the connecting head 202 and is converted to the first position, the first driving surface 72 and the second driving surface 652 cooperate to slide, so that the limiting protrusion 65 moves to the outside of the locking member 6, and thus exits from the rotation path of the second limiting member 7. When the second limiting member 7 passes over the limiting protrusion 65, the first driving surface 72 and the second driving surface 652 are separated. Driven by the force of the elastic member 63 to return to its original state, the limiting protrusion 65 extends into the locking member 6 again, and the limiting protrusion 65 blocks the reverse rotation path of the second limiting member 7. At this time, the second blocking structure 651 and the second matching structure 71 can play a role.

[0063] In this embodiment, when it is necessary to release the locking of the second locking mechanism, it is necessary to drive the free end of the elastic member 63 to move outward of the locking member 6, so that the limiting protrusion 65 is converted to the second state. This process can be completed by an external tool, or a driving member capable of driving the free end of the elastic member 63 to move outward can be provided on the locking member 6. The driving member can adopt a structure in the prior art. After the second locking mechanism is unlocked, drive the locking member 6 to rotate in the second rotation direction and switch to the second position, then the locking of the first locking mechanism can be released. After that, only need to axially drive the total wire connector 100 and the second connector 200 to move in opposite directions, and the total wire connector 100 and the second connector 200 can be separated.

[0064] In some preferred embodiments, there are two first limiting members 5 provided at intervals in the circumferential direction of the insertion portion 21. Correspondingly, along the circumferential direction of the locking member 6, two limiting grooves 61 are provided at intervals on the inner side of the locking member 6, and two guiding grooves 62 respectively communicating with the two limiting grooves 61 are provided. In some preferred embodiments, there are two second limiting members 7 provided at intervals in the circumferential direction of the insertion portion 21. Along the circumferential direction of the locking member 6, two elastic members 63 with limiting protrusions 65 fixed thereon are provided at intervals on the inner side of the locking member 6.

[0065] In some preferred embodiments, the locking member 6 is detachably provided on the connector head 202, so that when the locking member 6 is damaged, the locking member 6 can be disassembled and replaced, which is more cost-saving compared to replacing the entire second connector 200.

[0066] In this embodiment, two first plug connectors 2A are respectively connected to two second connectors 200, and a first locking mechanism and a second locking mechanism are provided between each first plug connector 2A and the second connector 200. Since the two first plug connectors 2A extend along the same length direction, if the locking is performed by an axially engaging method, when detaching one of the second connectors 200 from the first plug connector 2A, it is very likely to affect the connection of the other second connector 200. And this embodiment can avoid the occurrence of the above situation, and the safety performance is better.

[0067] In this embodiment, the total wire connection structure further includes a third connector 300. The third connector 300 is connected to the second plug connector 2B. A engaging member is provided on one of the third connector 300 and the second plug connector 2B, and a second card slot is provided on the other. The engaging member is axially inserted into the second card slot to form a lock. Specifically, the engaging members 301 are provided on the third connector 300 and have two respectively disposed on both sides of the third connector 300. Two second card slots 25 are provided on both sides of the second plug connector 2B.

[0068] In other embodiments, the three plug connectors 2 are respectively connected to the three second connectors 200, and a first locking mechanism and a second locking mechanism are provided between each first plug connector 2 and the second connector 200. In some other embodiments, only one plug connector 2 is provided with a first locking mechanism and a second locking mechanism between it and the second connector 200.

[0069] Embodiment 2

[0070] There is no illustration. The main difference between this embodiment and Embodiment 1 is that, in this embodiment, the locking member 6 is rotatably arranged on the plug connector 2 around the axis of the plug connector 2. The first limiting member 5 and the second limiting member 7 protrude outward from the outer peripheral portion of the connector head 202, and the second locking mechanism is arranged between the locking member 6 and the connector head 202.

[0071] Embodiment 3

[0072] There is no illustration. The main difference between this embodiment and Embodiment 1 is that, in this embodiment, the second locking mechanism is arranged between the locking member 6 and the connector head 202. When the second locking mechanism is in the locked state, the locking member 6 cannot rotate relative to the connector head 202. Since the relative rotation between the plug connector 2 and the connector head 202 is locked after they are cooperatively inserted, when the locking member 6 is locked relative to the connector head 202, the locking member 6 also cannot rotate relative to the first limiting member 5, and thus cannot be switched to the second position. When the locking between the locking member 6 and the connector head 202 is released, the locking member 6 can rotate relative to the connector head 202. During the rotation process, the locking member 6 also rotates relative to the plug connector 2, and the locking member 6 can be switched to the second position to release the locking of the first locking mechanism.

[0073] In summary, for the total - to - branch line connection structure for the micro - inverter in all the above embodiments, after the plug connector 2 and the connector head 202 are cooperatively inserted, by rotating the locking member 6 to make it switch to the first position, the first locking mechanism can be driven to switch to the locked state, so that the plug connector 2 and the connector head 202 are axially locked and cannot be axially separated. A second locking mechanism is also provided between the locking member 3 and the plug connector 2 or the connector head 202 to prevent the locking member 6 from switching to the second position and unlocking the first locking mechanism. During the process of the locking member 6 switching to the first position, the second locking mechanism automatically switches to the locked state, that is, only by rotating the locking member 6 can the locking of the total - to - branch line connector 100 and the second connector 200 be completed simultaneously. The operation is simple. The two locking mechanisms improve the connection stability and reliability between the total - to - branch line connector 100 and the second connector 200, and the safety performance is higher.

[0074] The above embodiments are only used to illustrate the technical concept and features of the present utility model. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A main branch line connector for a micro inverter, characterized in that: The main branch line connector includes a shell with an installation cavity, and three connecting terminals fixed in the installation cavity and spaced apart from each other, the shell includes a main body and three plug connectors spaced apart along the circumference of the main body; each of the connecting terminals includes a connecting portion and three pins spaced apart along the circumference of the connecting portion, the connecting portion is electrically connected to the pins, and the three pins of each connecting terminal are separately arranged in the three plug connectors; the main body and the three connecting terminals are integrally formed.

2. The main branch line connector for a micro inverter according to claim 1, characterized in that: The housing and the three connecting terminals are integrally formed; Alternatively, at least one of the plug connectors, the main body, and the three connecting terminals are integrally formed; The three plug connectors include two first plug connectors extending in the same length direction, and a second plug connector whose extension direction is perpendicular to the extension direction of the first plug connector, and the three plug connectors are located in the same plane, so that the housing is T-shaped; the two first plug connectors, the main body and the three connection terminals are integrally formed, and the second plug connector is detachably connected to the main body; Alternatively, the three connection terminals are respectively a live wire terminal, a neutral wire terminal and a ground wire terminal, the three pins of the live wire terminal are all live wire pins, the three pins of the neutral wire terminal are all neutral wire pins, the three pins of the ground wire terminal are all ground wire pins, and each of the plug connectors is provided with one live wire pin, one ground wire pin and one neutral wire pin at intervals; Alternatively, the three pins of each connecting terminal include a first pin extending along the same length direction, and a second pin extending in a direction perpendicular to the first pin, and the three pins are located in the same plane, so that the connecting terminal is T-shaped.

3. A main branch line connection structure for a micro inverter, comprising the main branch line connector according to any one of claims 1 to 2, characterized in that: The main-branch line connection structure also includes a second connector having a connector. When the main-branch line connector is mated with the second connector, the connector and the plug connector are axially mated and plugged together. A locking mechanism is provided between at least one of the plug connector and the connector. The locking mechanism includes a locking piece rotatably arranged on one of the plug connector and the connector around an axis line. The locking piece is configured to drive the locking mechanism to a locked state by rotation.

4. The main branch line connection structure for a micro inverter according to claim 3, characterized in that: The locking mechanism comprises a first locking mechanism, which is used to limit the displacement of the plug connector and the connector along the axial direction of the connector, and the first locking mechanism comprises a first limiting member fixed on the other of the plug connector and the connector; the locking member has a first position and a second position relative to the first limiting member, and when the locking member is in the first position, the first locking mechanism is in a locked state; when the locking member is in the second position, the first locking mechanism is in an unlocked state; A second locking mechanism is also provided between the locking member and the plug connector or between the locking member and the connector for limiting the relative rotation between the first limiting member and the locking member. When the locking member is in the first position, the second locking mechanism is in a locked state.

5. The main branch line connection structure for a micro inverter according to claim 4, characterized in that: The locking member is provided with a limiting groove extending along a first direction, wherein the first direction is perpendicular to the axial direction of the connecting head; when the locking member is in the first position, the first limiting member is located in the limiting groove; when the locking member is in the second position, the first limiting member is disengaged from the limiting groove; the locking member is provided with a guiding groove extending along a second direction, wherein the second direction is parallel to the axial direction of the connecting head; the guiding groove is connected to the limiting groove, and the notch of the guiding groove gradually becomes smaller along the direction approaching the limiting groove; when the first limiting member is located in the guiding groove, the locking member is in the second position.

6. The main branch line connection structure for a micro inverter according to claim 4, characterized in that: The locking member is annular and sleeved on the connector, the second locking mechanism comprises a first blocking structure and a second blocking structure arranged on the locking member, and a first matching structure and a second matching structure arranged on the plug connector, the first blocking structure and the second blocking structure are arranged at intervals along the circumference of the locking member; When the locking piece is in the first position, the first blocking structure is blocked on the rotation path of the first matching structure, and the second blocking structure is blocked on the rotation path of the second matching structure. Along the circumference of the locking piece, the first matching structure and the second matching structure are located between the first blocking structure and the second blocking structure.

7. The main branch line connection structure for a micro inverter according to claim 6, characterized in that: A side portion of the first limiting member constitutes the first matching structure; The plug connector is provided with a second stopper, the second stopper protrudes outwardly from the outer peripheral portion of the plug connector, and a side portion of the second stopper constitutes the second matching structure. The locking member is provided with a limiting groove extending along a first direction, the first direction is perpendicular to the axial direction of the connector, and along the first direction, a groove wall on one side of the limiting groove constitutes the first blocking structure; The locking member is provided with a limiting protrusion extending radially inwardly of the locking member, and the second blocking structure is arranged on the limiting protrusion.

8. The main branch line connection structure for a micro inverter according to claim 7, characterized in that: The locking member is provided with an elastic member and a through groove communicating with the inner and outer sides of the locking member, the elastic member has a fixed end and a free end, the fixed end is fixedly connected to the side wall of the through groove, the free end can be movably arranged along the radial direction of the locking member, and the limiting protrusion is fixedly arranged at the free end; the limiting protrusion has a first state and a second state, in the first state, the limiting protrusion is blocked on the rotation path of the second limiting member; in the second state, along the radial direction of the locking member, the limiting protrusion extends from the through groove to the outer side of the locking member; A driving structure is provided between the second limiting member and the limiting protrusion, and the driving structure is configured to drive the limiting protrusion to switch to the second state when the locking member switches to the first position.

9. The main branch line connection structure for a micro inverter according to claim 8, characterized in that: The driving structure includes a first driving surface arranged on the second limiting member and a second driving surface arranged on the limiting protrusion, the first driving surface and the second matching structure are arranged on different sides of the second limiting member, the second driving surface and the second blocking structure are arranged on different sides of the limiting protrusion, the first driving surface extends from the outside to the inside along the radial direction of the plug connector in a direction away from the second matching structure, and the second driving surface extends from the inside to the outside along the radial direction of the locking member in a direction away from the second blocking structure.

10. The main branch line connection structure for a micro inverter according to claim 4, characterized in that: The locking piece is annular and can be relatively rotatably sleeved on the connector, and an annular connection groove is formed between the locking piece and the connector; the plug connector includes an annular plug-in portion, the plug pin is located in the plug-in portion and is spaced from the plug-in portion, the first limit piece protrudes outward and extends from the outer peripheral portion of the plug-in portion, and when the main branch line connector is mated with the second connector, the plug-in portion and the first limit piece are inserted in the connection groove; And / or, the locking piece is detachably arranged on the connecting head.

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