Elastic contact and dc photovoltaic connector using the same

Abstract

The utility model belongs to the technical field of connector, specifically relates to a kind of elastic contact and direct current photovoltaic connector using the elastic contact, and direct current photovoltaic connector includes shell, the contact of being set in shell, the contact is elastic contact, and elastic contact includes contact body, printed board pin, the tail end of contact body is integrally connected bending structure, the other end of bending structure is integrally connected printed board pin, the shell is equipped with anti-swing groove, and the limiting piece for being nested in anti-swing groove to stop elastic contact circumferential swing is equipped on elastic contact.The utility model's contact has elastic structure, and elastic structure can accommodate the force from connector or printed board by elastic deformation, avoid the looseness of the welding point between contact and printed board, ensure stable connection, and multiple contacts can be integrated on connector, reduce overall volume.

Description

Technical Field

[0001] This utility model belongs to the field of connector technology, specifically relating to an elastic contact and a DC photovoltaic connector using the elastic contact. Background Technology

[0002] Photovoltaic inverters convert direct current (DC) generated by solar photovoltaic (PV) panels into alternating current (AC), forming a crucial component of distributed grid-connected PV systems. Microinverters, used in distributed PV systems, can collect smaller currents and offer advantages such as smaller size and enhanced safety. Microinverters have a compact internal structure and limited wiring space, typically featuring an internal PCB circuit board. Each PV connector terminal is directly soldered to the PCB board, and the microinverter housing connects to the PV connector housing, creating a sealed inverter device. However, this method requires separate connections to multiple PV terminals, which is detrimental to the sealing of the microinverter device. Positional errors can occur during PCB board mounting to the microinverter housing, and the solder joints of the PV connector terminals may experience stress after soldering. Furthermore, the high temperatures generated internally during operation can cause slight deformation of the internal PCB board, further stressing the PCB solder joints and potentially compromising the stable electrical connection of the PV connectors. CN1 18099818A discloses a photovoltaic connector that facilitates integration and makes connection operations more convenient. This connector uses a multi-hole bracket to fix single-core photovoltaic connectors together before the entire assembly is installed into the photovoltaic device. The type of single-core connector can be adjusted according to specific needs. CN221708969U discloses a floating-connection board-end photovoltaic connector, solving the technical problems in the prior art where the position of the conductive terminals and the circuit board during soldering is prone to deviation, and where panel deformation during chassis assembly leads to inconsistent dimensions and errors.

[0003] Currently, micro-inverters require connectors with more compact layouts and smaller size. Although the technical solution in CN1 18099818A integrates multiple connectors, it is still a separate structure. The photovoltaic connector needs to be installed in a long bracket and then installed on the device as a whole. Moreover, the tail pins of the contact terminal are rigidly connected to the PCB board, which has poor resistance to deformation. If structural or assembly errors occur, assembly cannot be smooth. After assembly and soldering, the solder joints are stressed. During the use of the connector, internal deformation and displacement occur (e.g., when the connector is mated), causing the solder joints between the contact pins and the printed circuit board to loosen, affecting the connection stability. The technical solution in CN 221708969U solves the technical problems of easy deviation in the position of the conductive terminal and the circuit board during the welding of the existing technology and the deformation of the panel during the assembly of the chassis, which leads to inconsistent dimensions and errors. However, this connector is a threaded connection and is relatively large. Currently, micro-inverter devices are small in size and have compact internal installation space. The large operating space required for threaded connectors is not suitable for micro-inverter devices with small size requirements. Utility Model Content

[0004] To address the aforementioned technical problems of large size and poor deformation resistance of photovoltaic connectors, this utility model provides an elastic contact and a DC photovoltaic connector using the elastic contact.

[0005] The purpose of this utility model is achieved by the following technical solution. According to this utility model, an elastic contact includes a contact body and printed circuit board pins. A bent structure is integrally connected to the tail end of the contact body, and the other end of the bent structure is integrally connected to the printed circuit board pins. A limiting piece is provided on the side wall of the contact body to prevent the elastic contact from swinging circumferentially within the connector.

[0006] Furthermore, the bending structure is a U-shaped bending structure, with the printed circuit board pins perpendicular to the contact body.

[0007] Furthermore, the outer wall of the contact body is provided with positioning claws for fixing the elastic contact in the connector.

[0008] Furthermore, the contact body is provided with a sealing plate to prevent sealant from entering the mating end of the contact body, and the side wall of the contact body is provided with an overflow hole (102) for sealant to overflow.

[0009] A DC photovoltaic connector includes a housing and a contact disposed within the housing. The contact is an elastic contact, which includes a contact body and printed circuit board pins. A bent structure is integrally connected to the tail end of the contact body, and the other end of the bent structure is integrally connected to the printed circuit board pins. The housing is provided with an anti-sway groove, and the elastic contact is provided with a limiting piece for being nested in the anti-sway groove to prevent the elastic contact from swaying circumferentially.

[0010] Furthermore, the housing is provided with a male end cavity and / or a female end cavity, the male end cavity is provided with a male end contact element, and the female end cavity is provided with a female end contact element.

[0011] Furthermore, a locking groove is provided on the side of the male end cavity, and a locking buckle is provided on the side of the female end cavity.

[0012] Furthermore, the housing is provided with a claw positioning groove, which is located on the inner wall of the male end cavity or the female end cavity, and the outer wall of the elastic contact member is provided with a positioning claw for being locked in the claw positioning groove (305).

[0013] Furthermore, the tail of the housing is provided with a glue storage tank, which is connected to the male end cavity or the female end cavity.

[0014] Furthermore, the outer wall of the housing is provided with a mounting groove, which engages with the snap-fit ​​mounting structure on the device on which the DC photovoltaic connector is installed.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] The contact of this invention has an elastic structure. The elastic structure can accommodate the force from the connector or printed circuit board through elastic deformation, preventing the solder joints between the contact and the printed circuit board from loosening, ensuring a stable connection. Furthermore, multiple contacts can be integrated on the connector to reduce the overall size.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the purpose, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1a This is a three-dimensional schematic diagram of a first embodiment of a DC photovoltaic connector according to the present invention;

[0019] Figure 1b This is a cross-sectional view of a first embodiment of a DC photovoltaic connector according to this utility model;

[0020] Figure 1c This is an exploded view of a first embodiment of a DC photovoltaic connector according to the present invention;

[0021] Figure 2a This is a three-dimensional schematic diagram of a second embodiment of the DC photovoltaic connector of this utility model;

[0022] Figure 2b This is an exploded view of a second embodiment of the DC photovoltaic connector of this utility model;

[0023] Figure 3a for Figures 1a to 1c Cross-sectional view of the inner shell I;

[0024] Figure 3b for Figure 3a A three-dimensional schematic diagram;

[0025] Figure 3c for Figure 3a A three-dimensional diagram from another perspective;

[0026] Figure 4 for Figure 2a , Figure 2b A three-dimensional schematic diagram of the middle shell II;

[0027] Figure 5 for Figure 2a , Figure 2b A three-dimensional schematic diagram of the middle limiting plate;

[0028] Figure 6a for Figures 1a to 1c A three-dimensional schematic diagram of the contact component at the Zhonggong terminal;

[0029] Figure 6b for Figure 6a A three-dimensional diagram from another perspective;

[0030] Figure 6c for Figures 1a to 1c A three-dimensional schematic diagram of the female contact component;

[0031] Figure 6d for Figure 6c A three-dimensional diagram from another perspective;

[0032] Figure 7a for Figure 2a , Figure 2b A three-dimensional diagram of the braided strap insertion hole;

[0033] Figure 7b for Figure 7a A schematic diagram of the decomposition process;

[0034] Figure 7c for Figure 2a , Figure 2b A three-dimensional diagram of the braided belt with inserts;

[0035] Figure 7d for Figure 7c A schematic diagram of the decomposition process;

[0036] Figure 8a This is a three-dimensional schematic diagram of a third embodiment of the DC photovoltaic connector of this utility model;

[0037] Figure 8b This is a three-dimensional schematic diagram of a fourth embodiment of the DC photovoltaic connector of this utility model;

[0038] Figure 8c This is a three-dimensional schematic diagram of a fifth embodiment of the DC photovoltaic connector of this utility model;

[0039] Figure 8d This is a three-dimensional schematic diagram of a sixth embodiment of the DC photovoltaic connector of this utility model;

[0040] Figure 9 This is a schematic diagram of the installation of a DC photovoltaic connector according to Embodiment 1 of the present invention on a micro inverter device.

[0041] Figure label:

[0042] 1-Integral pin,

[0043] 101-Positioning gripper,

[0044] 102 - Overflow hole,

[0045] 103-U-shaped bending structure,

[0046] 104-Glue-sealing board,

[0047] 105 - Printed Circuit Board Pin I

[0048] 106-Limiting plate,

[0049] 107 - Integrated pin body,

[0050] 108-Extension section,

[0051] 2-Integrated socket,

[0052] 201-Integrated socket body,

[0053] 3-Shell I,

[0054] 301-male end cavity,

[0055] 302-Mother end cavity,

[0056] 303-Locking groove,

[0057] 304 locking buckle,

[0058] 305 - Claw positioning slot,

[0059] 306-Anti-sway groove,

[0060] 307-Glue Storage Tank

[0061] 308 - Install baffle,

[0062] 309 - Anti-sway bump,

[0063] 310-Mounting Groove

[0064] 4-Sealing ring,

[0065] 5- Braided strap insert,

[0066] 501-Braided Tape Insert Body

[0067] 6- Braided strap insertion hole,

[0068] 601- Braided strap insertion body,

[0069] 602- Braided tape,

[0070] 603-Limiting Hole

[0071] 604 - Printed Circuit Board Pin II

[0072] 605-L-shaped structure,

[0073] 7-Shell II,

[0074] 701 - Limiting plate support structure,

[0075] 702-Fixing Buckle

[0076] 703 - Fixing buckle protrusion,

[0077] 8-Limit plate,

[0078] 801 - Through hole,

[0079] 802-Limit buckle,

[0080] 803-Limit Post

[0081] 804 - Limiting buckle protrusion,

[0082] 9-Snap-fit ​​installation structure,

[0083] 901-U-shaped groove structure.

[0084] 10 - Printed Circuit Board. Detailed Implementation

[0085] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0086] This utility model discloses a DC photovoltaic connector, as shown in Embodiment 1. Figures 1a to 1c , Figures 3a to 3c , Figures 6a to 6d , Figure 9 As shown. The connector includes a housing 1 3, a male contact, a female contact, and a sealing ring 4. In this embodiment, the connector is a two-core connector, with male and female contacts internally arranged; therefore, the connector can function as both a male and female connector simultaneously.

[0087] like Figures 3a to 3c As shown, the housing I 3 is an integral structure. The housing I 3 is provided with a male end cavity 301 and a female end cavity 302. A male end contact is inserted into the male end cavity 301 and a female end contact is inserted into the female end cavity 302.

[0088] The male terminal cavity 301 has two locking grooves 303 on its outer sides, which can be used to lock with commercially available photovoltaic single-core female connectors. The female terminal cavity 302 has two locking buckles 304 on its outer sides, which can be used to lock with commercially available photovoltaic single-core male connectors.

[0089] The inner walls of both the male end cavity 301 and the female end cavity 302 are provided with annular claw positioning grooves 305. When they are engaged with the corresponding male end contact and female end contact, the positioning claws 101 on the waist of the male end contact and female end contact are engaged in the claw positioning grooves 305, thereby achieving reliable assembly of the male end contact and female end contact.

[0090] Both the male end cavity 301 and the female end cavity 302 are provided with glue storage tanks 307 on their tail side walls. The glue storage tanks 307 are connected to the corresponding male end cavity 301 and female end cavity 302 and are used for potting sealant.

[0091] The tail sidewalls of the male end cavity 301 and the female end cavity 302 are also provided with anti-sway grooves 306. The male end contact and the female end contact are inserted into the corresponding male end cavity 301 and female end cavity 302. The anti-sway groove 306 cooperates with the limiting piece 106 on the outer wall of the male end contact and the female end contact. The limiting piece 106 is inserted into the anti-sway groove 306 when the contact is inserted. The width of the anti-sway groove 306 gradually decreases in the insertion direction, which has the function of guiding the assembly of the contact and fixing the contact after it is assembled in place, thus limiting the swaying of the contact in the circumferential direction. In order to increase the stability of the limiting, the axial length of the anti-sway groove 306 is increased in this embodiment. An anti-sway protrusion 309 is provided on the tail end face of the housing I 3. One sidewall of the anti-sway protrusion 309 is aligned with the inner wall of the corresponding male end cavity 301 and female end cavity 302. The anti-sway groove 306 extends and penetrates the sidewall of the anti-sway protrusion 309.

[0092] The outer rear wall of housing I 3 is provided with a mounting baffle 308 and a mounting groove 310. The mounting baffle 308 has a mounting groove 210 on its rear side, and the mounting baffle 308 serves as one of the inner sidewalls of the mounting groove 310. This structure can be used with micro-inverter equipment or other equipment with a snap-fit ​​mounting structure 9, such as... Figure 9 As shown, a U-shaped groove structure 901 is provided on one side of the snap-fit ​​mounting structure 9. One outer wall of the U-shaped groove structure 901 mates with the mounting baffle 308, and the other outer wall mates with the other inner wall of the mounting groove 310, thus nesting the U-shaped groove structure 901 within the mounting groove 310. The U-shaped groove structure 901 also has a notch that matches the bottom contour of the mounting groove 310. Commonly used nut-locking connectors require more installation space and are not suitable for this type of equipment.

[0093] The contact element in this embodiment has a flexible structure, which meets the requirements for floating installation of the connector, such as... Figures 6a to 6b As shown. In this embodiment, the contact is an integral contact, which includes a contact body and an integral elastic structure. The male contact is an integral pin 1, and the female contact is an integral socket 2. The integral pin 1 includes an integral pin body 107 (contact body), and the integral socket 2 includes an integral socket body 201 (contact body). The tail ends of both the integral pin 1 and the integral socket 2 are integrally provided with the same integral elastic structure, which includes a U-shaped bending structure 103. The integrated pin body 107 and the integrated socket body 201 have similar structures, but the difference is that the insertion end of the integrated pin body 107 is needle-shaped, while the insertion end of the integrated socket body 201 is hole-shaped. The shape, size, and position of the positioning claw 101, overflow hole 102, glue blocking plate 104, and limiting piece 106 on the integrated pin body 107 and the integrated socket body 201 are adjusted according to their own characteristics and their cooperation with the housing I 3. The integrated pin 1 is used as an example for explanation.

[0094] The integrated pin body 107 has a positioning claw 101, a glue-sealing plate 104, a glue overflow hole 102, and a limiting piece 106 arranged sequentially on the rear side of the mating end. The extension 108 at the tail end of the integrated pin body 107 is connected to one side wall of the U-shaped bending structure 103. The end of the other side wall of the U-shaped bending structure 103 is provided with a printed circuit board pin I 105 for insertion onto the printed circuit board 10. The printed circuit board pin I 105 is perpendicular to the integrated pin body 107. The integrated pin body 107 is basically located in the corresponding male end cavity 301, and its extension 108 extends out of the male end cavity 301, protruding from the end face of the tail side wall of the integrated pin body 107.

[0095] The printed circuit board pin I 105 at the tail of the connector is connected to the integrated connector body 107 via a U-shaped bending structure 103. The extension direction of the printed circuit board pin I 105 is perpendicular to the insertion direction of the integrated connector, facilitating the installation of the printed circuit board 10. The U-shaped bending structure 103 is elastic, and can undergo elastic deformation after the printed circuit board pin I 105 is subjected to force, accommodating installation position errors of the printed circuit board 10 and avoiding excessive stress concentration at the solder joints of the printed circuit board pin I 105.

[0096] In this embodiment, multiple positioning claws 101 are distributed circumferentially on the outer side wall of the integrated pin body 107. The positioning claws 101 are elastic cantilever structures extending towards the tail. The positioning claws 101 are raised outward. When the integrated pin is inserted into the corresponding male end cavity 301, the positioning claws 101 deform and retract inward. After the integrated pin is inserted into place, the positioning claws 101 move to the claw positioning groove 305. The claw positioning groove 305 provides a receiving space for the positioning claws 101. The positioning claws 101 return to their original shape and are nested in the claw positioning groove 305, thereby fixing the integrated pin in the housing I 3.

[0097] The outer wall of the integrated pin body 107 is provided with a limiting piece 106 protruding. The length direction of the limiting piece 106 is the insertion direction. The limiting piece 106 cooperates with the anti-sway groove 306 at the tail of the housing I 3 to limit the contact member from swinging in the circumferential direction, which facilitates the positioning of the printed circuit board pin I 105, thereby inserting the printed circuit board pin I 105 into the corresponding hole on the printed circuit board 10.

[0098] The integrated pin body 107 has a sealing plate 104 inside. The sealing plate 104 separates the cavity inside the integrated pin body 107. After the contact is assembled with the housing I 3, sealant needs to be injected into the tail of the integrated pin body 107. At this time, the sealing plate 104 prevents the sealant from entering the inner wall of the terminal plug end, so as to avoid the product electrical connection failure.

[0099] Both sides of the integrated pin body 107 are provided with overflow holes 102. When sealant is injected into the tail of the integrated pin body 107, the sealant is blocked by the sealant plate 104, so that the sealant overflows from the overflow holes 102, which facilitates the sealant to be evenly filled around the contact and achieves the seal between the contact and the housing I 3.

[0100] The sealing ring 4 is fitted on the outer side wall of the female end cavity 302. When the connectors are inserted, it achieves a seal at the interface between the connectors and the mating interface.

[0101] A second embodiment of the DC photovoltaic connector of this utility model is as follows: Figures 2a to 2b , Figures 4 to 5 , Figures 7a to 7d As shown, the connector includes a housing II 7, a sealing ring 4, a braided strip pin 5, a braided strip socket 6, and a limiting plate 8. In this embodiment, the connector is a two-core connector, with a braided strip pin 5 (as a male contact) and a braided strip socket 6 (as a female contact) inside. Therefore, the connector can function as both a male and female connector.

[0102] like Figure 4 As shown, this is housing II 7 of this embodiment. The difference between housing II 7 and housing I 3 is that housing II 7 has a limiting plate support structure 701 protruding from its tail end. Figure 5 The limiting plate 8 shown is engaged. A fixing buckle 702 is provided on one side of the limiting plate support structure 701. In this embodiment, two fixing buckles 702 are provided on the limiting plate support structure 701. The distribution direction of the two fixing buckles 702 is the same as the distribution direction of the contact parts (braided strip pins 5 and braided strip insertion holes 6) inside the housing II 7, and the extension direction of the fixing buckles 702 is perpendicular to the mating direction of the connector.

[0103] The limiting plate 8 has two through holes 801 in the middle, which respectively cooperate with the fixing buckles 702 on the limiting plate support structure 701 of the housing II 7. The fixing buckles 702 pass through the through holes 801 and the end of the fixing buckles 702 is locked on the surface of the limiting plate 8, thus fixing the limiting plate 8 and the housing II 7 together.

[0104] Limiting posts 803 are provided on both sides of the limiting plate 8, and the limiting posts 803 are perpendicular to the mating direction of the connector. Limiting buckles 802 are also provided on the limiting plate 8, with one limiting buckle 802 on each side of the limiting post 803, and the protrusion direction of the limiting buckles 802 on the limiting plate 8 is consistent with the protrusion direction of the limiting post 803.

[0105] In this embodiment, the fixing buckle 702 is located between the tails of the two contact members, the through hole 801 is located on the flat plate in the middle of the limiting plate 8, and the limiting posts 803 and the limiting buckles 802 on both sides are located on both sides of the limiting plate 8. After the limiting plate 8 is clamped on the fixing buckle 702, the fixing buckle 702 is located between the flat plates on both sides of the limiting plate 8, and the limiting posts 803 and the limiting buckles 802 face the tails of the contact members.

[0106] like Figures 7a to 7d The image shows a braided tape contact in this embodiment, which includes a contact body and a braided tape pin structure. The contact body in this embodiment is consistent with the contact body of the integrated contact in Embodiment 1. The braided tape contact in this embodiment includes a braided tape pin 5 and a braided tape socket 6. The braided tape pin 5 includes a braided tape pin body 501, and the braided tape socket 6 includes a braided tape socket body 601. The braided tape pin body 501 has the same structure as the integrated pin body 107 in Embodiment 1, and the braided tape socket body 601 has the same structure as the integrated socket body 201 in Embodiment 1, which will not be described again here. The braided tape pin structure of the braided tape pin 5 is the same as the braided tape pin structure of the braided tape socket 6; the braided tape pin structure of the braided tape socket 6 will be used as an example for explanation.

[0107] The braided tape socket body 601 and its corresponding braided tape pin structure are connected together by welding or crimping. The braided tape pin structure includes an L-shaped structure 605 and a braided tape 602. The L-shaped structure 605 is a hardened structure, but other shapes can also be used; no limitation is made here. One side of the L-shaped structure 605 is connected to the braided tape 602, and this side is on the same plane as the braided tape 602. The other end of the braided tape 602 is connected to the extension at the tail end of the braided tape socket body 601. The braided tape 602 is a flexible copper braided tape. This part of the structure is elastic and is an important structure for realizing the floating function of the contact, enabling the braided tape contact to float in all directions. The copper braided tape is made of copper wires or copper strips interwoven together, and can undergo elastic deformation under external force. The other end of the L-shaped structure 605 is provided with a printed circuit board pin II 604. The printed circuit board pin II 604 is perpendicular to the braided tape jack body 601. The printed circuit board pin II 604 ensures the operability of the pin of the contact element to connect with the printed circuit board 10.

[0108] A limiting hole 603 is provided on the side where the L-shaped structure 605 connects to the braided tape 602. The limiting hole 603 is an elongated hole, the length of which is axial (interlocking direction) of the contact element. After the limiting post 803 passes through the limiting hole 603, the limiting hole 603 slides with the limiting post 803 on the limiting plate 8. The sliding direction is axial of the contact element, which can limit the range of axial floating of the printed circuit board pin II 604.

[0109] like Figure 2a , Figure 2b As shown, housing II 7 is fixed to limiting plate 8 by fixing buckle 702. After braided tape insert pin 5 and braided tape insertion hole 6 are inserted into housing II 7, L-shaped structure 605 cooperates with limiting plate 8. The side of L-shaped structure 605 with limiting hole 603 is locked between two corresponding limiting buckles 802. The two sides of this side of L-shaped structure are limited by limiting buckles 802 to prevent the side from radially (perpendicular to the axial direction) dislodging from limiting plate 8. Limiting post 803 is inserted in limiting hole 603. Here, the movement range of L-shaped structure 605 along the axis of limiting post 803 can be limited to prevent the braided tape 602 from being damaged due to excessive movement range of L-shaped structure 605, to prevent the braided tape 602 from being permanently deformed and damaged, and to prevent L-shaped structure 605 from axially dislodging from limiting plate 8. By limiting the L-shaped structure 605 with the limiting plate 8, the printed circuit board pin II 604 is made perpendicular to the axis of the connector, which makes it easier to insert the printed circuit board pin II 604 onto the corresponding PCB board and solder it to the PCB board after the connector is assembled.

[0110] The braided strip pins 5 and 6 at their tails engage with the corresponding limiting posts 803 and limiting buckles 802 on both sides of the limiting plate 8, enabling the elastic floating of the braided strip pins 5 and 6. The limiting posts 803 engage with the limiting holes 603 of the braided strip contact. The elongated limiting holes 603 allow the printed circuit board pins II 604, which are inserted into the printed circuit board on the contact, to move axially, thereby allowing the connector to adapt to positional errors caused by assembly, deformation, etc.

[0111] After the braided tape pin structure is locked between the two limiting buckles 802, there is a gap between the two sides of the L-shaped structure 605 and the inner sidewall of the limiting buckle 802. The width of the limiting hole 603 is greater than the diameter of the limiting post 803. There is a gap between the upper surface of the L-shaped structure 605 and the limiting buckle protrusion 804 at the end of the limiting buckle 802, so that the L-shaped structure 605 can float radially and can accommodate positional errors caused by assembly and deformation in multiple directions.

[0112] Copper braided tape can undergo elastic deformation under relatively small forces, minimizing the force on the solder joints between the contact and the printed circuit board and ensuring a stable connection; the copper braided tape has a large overall cross-sectional area, allowing for the normal transmission of current and signals.

[0113] The thickness of the limiting buckle protrusion 804 gradually decreases in the extension direction of the limiting buckle 802, ensuring the smooth assembly of the L-shaped structure 605; the thickness of the fixing buckle protrusion 703 at the end of the fixing buckle 702 gradually decreases in the extension direction of the fixing buckle 702, ensuring the smooth assembly of the limiting plate 8.

[0114] In this utility model, the connector housing can be provided with a male end cavity or a female end cavity as needed, such as... Figures 8a to 8dThese are four other embodiments of the present invention.

[0115] like Figure 8a As shown, this is a third embodiment of a DC photovoltaic connector of the present invention. The difference from the first embodiment is that two male end cavities 301 are provided on the housing I 3, and locking grooves 303 are provided on both sides of the male end cavity 301. An integrated pin 1 is inserted into the male end cavity 301.

[0116] like Figure 8b As shown, this is a fourth embodiment of a DC photovoltaic connector of the present invention. The difference from the first embodiment is that two female end cavities 302 are provided on the housing I 3, and locking buckles 304 are provided on both sides of the female end cavity 302. An integrated socket 2 is inserted into the female end cavity 302.

[0117] like Figure 8c As shown, this is a fifth embodiment of a DC photovoltaic connector of the present invention. The difference from the second embodiment is that two male end cavities 301 are provided on the housing II 7, and locking grooves 303 are provided on both sides of the male end cavity 301. Braided strip pins 5 are inserted into the male end cavity 301.

[0118] like Figure 8d As shown, this is a sixth embodiment of a DC photovoltaic connector of the present invention. The difference from the second embodiment is that two female end cavities 302 are provided on the housing II 7, and locking buckles 304 are provided on both sides of the female end cavity 302. Braided tape insertion holes 6 are inserted into the female end cavity 302.

[0119] The connector designed in this utility model has a simple structure, requiring only two or more of the following components: a housing, a male contact, a female contact, a sealing ring, and a limiting plate. The simple structure requires no additional operating space during installation. The connector is simply snapped onto the snap-fit ​​mounting structure 9, and the printed circuit board pins (printed circuit board pin I 105 or printed circuit board pin II 604) are soldered to the printed circuit board 10. The two contacts share a single housing, resulting in a small footprint after installation. This not only reduces assembly difficulty but also makes it suitable for miniature inverter devices with smaller size requirements.

[0120] The connector designed in this utility model has an elastic structure (U-shaped bending structure 103 or braided strap 602) at the tail end. During the assembly of the connector's printed circuit board pins (printed circuit board pin I 105 or printed circuit board pin II 604), the elastic deformation of the elastic structure can compensate for the positional error caused by the assembly of the printed circuit board 10. When a positional error occurs, the elastic deformation can make the position of the printed circuit board pins adapt to the position of the printed circuit board 10. At the same time, during the use of the connector, the elastic structure can also reduce the stress concentration of the solder joints caused by the internal deformation of the connector. When the connector is inserted, the contact is displaced by the insertion force. The elastic structure can buffer the displacement, avoid damage to the solder joints between the printed circuit board pins and the printed circuit board 10, and ensure stable connection.

[0121] This utility model discloses an embodiment of an elastic contact, which is either a male or female contact as described in the above embodiments. The male contact can be an integrated pin 1 or a braided pin 5, and the female contact can be an integrated socket 2 or a braided socket 6. The contact includes a contact body (an integrated pin body 107, an integrated socket body 201, a braided pin body 501, or a braided socket body 601) and an elastic structure (a U-shaped bend structure 103 in the integrated elastic structure or a braided strip 602 in the braided pin structure). The integrated elastic structure can be the U-shaped bend structure 103 described in the above embodiments, or it can be an S-shaped bend structure, a W-shaped bend structure, or other bend structures. As long as the elastic structure can undergo elastic deformation to absorb the force when the printed circuit board pins or the inside of the connector are subjected to force, it is acceptable to avoid loose solder joints and affect connection stability. When the force inside the connector is transmitted to the contact body or the printed circuit board 10 to the printed circuit board pins, the elastic deformation of the elastic structure can absorb the received force, avoid damage to other structures (such as solder joints), and protect the connector and the equipment installed on the connector.

[0122] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resilient contact, comprising a contact body and printed circuit board pins, characterized in that: The tail end of the contact body is integrally connected to a bent structure, and the other end of the bent structure is integrally connected to a printed circuit board pin. The side wall of the contact body is provided with a limiting piece (106) for preventing the elastic contact from swinging circumferentially within the connector.

2. The elastic contact element according to claim 1, characterized in that: The bending structure is a U-shaped bending structure (103), and the printed circuit board pins are perpendicular to the contact body.

3. An elastic contact element according to any one of claims 1 or 2, characterized in that: The outer wall of the contact body is provided with positioning claws (101) for fixing the elastic contact in the connector.

4. An elastic contact element according to any one of claims 1 or 2, characterized in that: The contact body is provided with a sealing plate (104) to prevent sealant from entering the mating end of the contact body, and the side wall of the contact body is provided with an overflow hole (102) for sealant to overflow.

5. A DC photovoltaic connector, comprising a housing and contacts disposed within the housing, characterized in that: The contact is an elastic contact, which includes a contact body and a printed circuit board pin. The tail end of the contact body is integrally connected to a bent structure, and the other end of the bent structure is integrally connected to the printed circuit board pin. The housing is provided with an anti-sway groove (306), and the elastic contact is provided with a limiting piece (106) for nesting in the anti-sway groove (306) to stop the circumferential swing of the elastic contact.

6. A DC photovoltaic connector according to claim 5, characterized in that: The housing is provided with a male end cavity (301) and / or a female end cavity (302), the male end cavity (301) is provided with a male end contact, and the female end cavity (302) is provided with a female end contact.

7. A DC photovoltaic connector according to claim 6, characterized in that: The male end cavity (301) is provided with a locking groove (303) on the side, and the female end cavity (302) is provided with a locking buckle (304) on the side.

8. A DC photovoltaic connector according to claim 6, characterized in that: The housing is provided with a claw positioning groove (305), which is located on the inner wall of the male end cavity (301) or the female end cavity (302). The outer wall of the elastic contact member is provided with a positioning claw (101) for being locked in the claw positioning groove (305).

9. A DC photovoltaic connector according to claim 6, characterized in that: The tail of the housing is provided with a glue storage tank (307), which is connected to the male end cavity (301) or the female end cavity.

10. A DC photovoltaic connector according to claim 5, characterized in that: The outer wall of the housing is provided with a mounting groove (310), which cooperates with the snap-fit ​​mounting structure (9) on the equipment on which the DC photovoltaic connector is installed.

Images