Cable plug-in crimpless connector terminal and connector

Abstract

This invention relates to the field of photovoltaic connector technology, specifically to plug-in type crimp-free connector terminals for cables. It comprises a terminal head, a guide tube slidably positioned on the terminal head, and an elastic limiting kit fixedly connected to the terminal head and engaging with the guide tube for limiting. The elastic limiting kit extends to a clamping tongue facing the terminal head for clamping the cable conductor. During assembly with a stripped cable, the cable conductor passes through the guide tube and the elastic limiting kit. At this point, the cable conductor is not obstructed by the clamping tongue, effectively preventing cable tangling. As the cable continues to penetrate, the cable sheath pushes against the guide tube, causing it to slide deeper into the terminal head. This causes the elastic limiting kit, which engages with the guide tube for limiting, to deform. The elastic limiting kit brings the clamping tongue closer to the terminal head and clamps the cable conductor, effectively improving the clamping effect, preventing poor contact between the cable conductor and the terminal head, greatly reducing the risk of operational errors, and ensuring tool-free assembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic connector technology, specifically to plug-in type crimp-free connector terminals and connectors for cables. Background Technology

[0002] Photovoltaic connectors are core electrical connectors used in solar photovoltaic (PV) power generation systems to connect key equipment such as PV modules, combiner boxes, and inverters, and to transmit DC power. Among them, the MC4 connector is one of the most widely used PV connectors, featuring easy installation, good waterproofing, high temperature resistance, and corrosion resistance. The MC4 connector consists of three parts: a connecting shell, inner terminals, and waterproof silicone. Its pins have a diameter of 4 mm and are designed to be weatherproof, UV-resistant, and resistant to harsh environments, providing a long-term secure connection.

[0003] Traditional connectors require additional crimping tools to secure stripped cables to the ends of pins or sockets, resulting in low assembly efficiency. While existing tool-free crimp connectors can achieve tool-free cable crimping, the multiple wires of the cable are easily obstructed and scattered in the connector during cable threading, leading to poor crimping of the multiple wires and potential poor contact. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a plug-in type crimp-free connector terminal for cables.

[0005] Another object of the present invention is to provide a connector.

[0006] The objective of this invention is achieved through the following technical solution: a plug-in type crimp-free connector terminal for cables, comprising a terminal head, a wire tube that is slidably disposed on the terminal head, and an elastic limiting kit that is fixedly connected to the terminal head and engages with the wire tube for limiting and linkage. The elastic limiting kit extends with a crimping tongue facing the terminal head and used to press the cable wire. When the wire tube slides into the terminal head, the elastic limiting kit deforms, causing the crimping tongue to approach the terminal head and press the cable wire.

[0007] Preferably, the conduit includes a guide threading portion, a movable clearance portion, and a multi-step inclined guide portion connected in sequence. The multi-step inclined guide portion and the movable clearance portion extend into and are slidably disposed at the top end of the terminal head. The multi-step inclined guide portion has at least two limiting inclined steps that are inclined away from the movable clearance portion. The top of the elastic limiting kit is limited and abuts against the two limiting inclined steps. When the conduit slides into the terminal head, the top of the elastic limiting kit slides relative to the movable clearance portion along the limiting inclined steps and deforms, causing the clamping tongue to approach the terminal head and clamp the cable conductor.

[0008] Preferably, the guide threading part has a flared guide through hole and a cable gathering through hole connected in sequence along the cable threading direction; the top of the movable clearance part has a clearance groove for the top of the elastic limit kit to press down and move after the elastic limit kit is deformed.

[0009] Preferably, the elastic limiting kit includes an elastic fixing part, an elastic bending part, an elastic extension part, and an elastic bending frame part connected in sequence. The wire clamping tongue extends to the inner top surface of the elastic bending frame part, and the elastic fixing part is fixedly connected to the bottom end of the terminal head. The terminal head and the wire tube both pass through the elastic bending frame part. The inner top surface of the elastic bending frame part abuts against the top of the wire tube. When the wire tube slides into the terminal head, the elastic bending part and the elastic bending frame part deform and reset, causing the wire clamping tongue to approach the terminal head and press the cable wire.

[0010] Preferably, the elastic fixing part has limit slots on both sides, and the terminal head has bent buckles extending from both sides of its end, which engage with the limit slots one by one.

[0011] Preferably, the end of the terminal head has an anti-derailment protrusion, and the anti-derailment protrusion is inclined in a direction away from the beginning of the terminal head; when the clamping tongue presses the cable conductor, the anti-derailment protrusion and the clamping tongue work together to secure the cable conductor.

[0012] Preferably, the terminal head includes a terminal insertion part, a widening transition part and a terminal limiting part connected in sequence. The top surface of the terminal limiting part has a sliding groove for limiting the sliding of the wire conduit. The elastic limiting kit is fixedly connected to the bottom surface of the terminal limiting part, and the anti-derailment protrusion protrudes from the sliding groove.

[0013] Preferably, the terminal connector is a male pin or a female sleeve.

[0014] Another object of the present invention is achieved by the following technical solution: a connector, comprising a connecting housing and a plug-in type crimp-free connector terminal for cables as described above, wherein the plug-in type crimp-free connector terminal for cables is accommodated in the connecting housing.

[0015] Preferably, the inner cavity of the connecting housing has clearance space for the conduit to penetrate the terminal head and for the elastic limiting kit to deform.

[0016] The beneficial effects of this invention are as follows: The plug-in type crimp-free connector terminal for cables of this invention employs a terminal head, a wire tube that is slidably positioned on the terminal head, and an elastic limiting kit fixedly connected to the terminal head and engaging with the wire tube for limiting. The elastic limiting kit extends with a clamping tongue facing the terminal head and used to clamp the cable wire. When the wire tube slides deeper into the terminal head, the elastic limiting kit deforms, causing the clamping tongue to approach the terminal head and clamp the cable wire. When assembling with a cable whose end has been stripped, the cable wire passes through the wire tube and the elastic limiting kit. At this time, the cable wire is not obstructed by the clamping tongue, effectively preventing the cable wire from becoming tangled. As the cable continues to penetrate, the cable sheath pushes against the wire tube, causing the wire tube to slide deeper into the terminal head. This causes the elastic limiting kit, which engages with the wire tube for limiting, to deform. The elastic limiting kit then causes the clamping tongue to approach the terminal head and clamp the cable wire, effectively improving the clamping effect of the cable wire, avoiding poor contact between the cable wire and the terminal head, greatly reducing the risk of operational errors, and ensuring tool-free assembly efficiency. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the initial state of Embodiment 1 of the present invention; Figure 2 This is an exploded view of Embodiment 1 of the present invention; Figure 3 This is an exploded view of Embodiment 1 of the present invention from another perspective; Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention after assembly with a cable whose ends have been stripped; Figure 5 This is a partial cross-sectional view of the initial state of Embodiment 3 of the present invention; Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention after assembly with a cable whose ends have been stripped; Figure 7 This is a partial cross-sectional view of Embodiment 3 of the present invention after assembly with a cable whose ends have been stripped; Figure 8 This is a schematic diagram of the structure in the initial state of Embodiment 2 of the present invention; Figure 9 This is an exploded view of Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the structure of Embodiment 2 of the present invention after assembly with a cable whose ends have been stripped; Figure 11 This is a partial cross-sectional view of the initial state of Embodiment 4 of the present invention; Figure 12 This is a schematic diagram of the structure after assembly of Embodiment 4 of the present invention with a cable whose ends have been stripped.

[0018] The attached figures are labeled as follows: 1. Wire clamp; 2. Cable conductor; 3. Terminal head; 31. Terminal insertion part; 32. Widened transition part; 33. Terminal limiting part; 4. Wire conduit; 41. Guide wire threading part; 42. Movable clearance part; 43. Multi-stage inclined guide part; 5. Elastic limiting kit; 51. Elastic fixing part; 52. Elastic bending part; 53. Elastic extension part; 54. Elastic bending frame part; 6. Limiting inclined step; 7. Flared guide through hole; 8. Cable gathering through hole; 9. Clearance groove; 10. Limiting slot; 11. Bending buckle; 12. Anti-derailment tooth; 13. Slide groove; 14. Connecting housing; 15. Clearance space. Detailed Implementation

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0020] Example 1 like Figure 1-4 As shown, the plug-in type crimp-free connector terminal for cables includes a terminal head 3, a wire tube 4 that is slidably positioned on the terminal head 3, and an elastic limiting kit 5 that is fixedly connected to the terminal head 3 and engages with the wire tube 4 for limiting and linkage. The elastic limiting kit 5 extends to have a crimping tongue 1 facing the terminal head 3 and used to press the cable wire 2. When the wire tube 4 slides into the terminal head 3, the elastic limiting kit 5 deforms, causing the crimping tongue 1 to approach the terminal head 3 and press the cable wire 2.

[0021] When assembling the connector terminals with the stripped cable, the cable conductor 2 passes through the conductor tube 4 and the elastic limiting kit 5. At this time, the cable conductor 2 is not obstructed by the clamping tongue 1, effectively preventing the cable conductor 2 from becoming tangled; Figure 4 As shown, as the cable continues to penetrate deeper, the outer sheath of the cable pushes against the conductor tube 4, causing the conductor tube 4 to slide deeper into the terminal head 3. This causes the elastic limiting kit 5, which is in conjunction with the limiting linkage of the conductor tube 4, to deform. The elastic limiting kit 5 brings the clamping tongue 1 close to the terminal head 3 and presses the cable conductor 2, effectively improving the clamping effect of the cable conductor 2, avoiding poor contact between the cable conductor 2 and the terminal head 3, greatly reducing the risk of operational errors, and ensuring the efficiency of tool-free assembly.

[0022] Furthermore, the conduit 4 includes a guide threading portion 41, a movable clearance portion 42, and a multi-stage inclined guide portion 43 connected in sequence. The multi-stage inclined guide portion 43 and the movable clearance portion 42 extend into and are slidably positioned at the top end of the terminal head 3. The multi-stage inclined guide portion 43 has at least two limiting inclined steps 6 that are inclined away from the movable clearance portion 42. Before the connector terminal is assembled with the stripped cable, when the conduit 4 is assembled with the terminal head 3, the conduit 4 slides into the terminal head 3. Under the guidance of the first limiting inclined step 6, the top of the elastic limiting kit 5 slides relative to each other between the two limiting inclined steps 6 and is limited and abutted, forming the connector terminal in its initial state, such as... Figure 1 As shown; when the wire tube 4 slides into the terminal head 3, the top of the elastic limiting kit 5 slides relative to the movable relief part 42 along the limiting inclined step 6 and deforms and resets, causing the crimping tongue 1 to approach the terminal head 3 and press the cable wire 2, thus completing the plug-in type crimp-free cable assembly, as shown. Figure 4 As shown. When assembling the connector terminal with the stripped cable end, the cable conductor 2 passes through the guide threading part 41, the movable relief part 42 and extends into the multi-step inclined guide part 43. At this time, the cable conductor 2 has passed through the elastic limiting kit 5. As the cable continues to go deeper, the outer sheath of the cable pushes against the guide threading part 41, causing the conductor tube 4 to slide into the terminal head 3 as a whole. Under the guidance of the second limiting inclined step 6, the top of the elastic limiting kit 5 slides into the movable relief part 42. At this time, the elastic limiting kit 5 deforms and resets, and the top of the elastic limiting kit 5 presses down, causing the crimping tongue 1 to approach the terminal head 3 and press the cable conductor 2, thus completing the plug-in type crimp-free cable assembly. In this embodiment, the guide threading part 41, the movable clearance part 42, and the multi-stage inclined guide part 43 are integrally formed structures; the multi-stage inclined guide part 43 has two limiting inclined steps 6. It should be noted that the limiting inclined step 6 away from the movable clearance part 42 is defined as the first limiting inclined step 6, and the limiting inclined step 6 closer to the movable clearance part 42 is defined as the second limiting inclined step 6.

[0023] Furthermore, the guide threading part 41 has a flared guide through hole 7 and a cable gathering through hole 8 connected sequentially along the cable threading direction; the top of the movable clearance part 42 has a clearance groove 9 for the top of the elastic limiting kit 5 to press down after deformation, which allows the top of the elastic limiting kit 5 to slide into the movable clearance part 42 and restricts the elastic limiting kit 5 from returning between the two limiting inclined steps 6, preventing the cable wire 2 from being pulled out and detached from the connector terminal. When threading the cable wire 2, the flared guide through hole 7 guides multiple cable wires 2 into the cable gathering through hole 8 for centralized shaping and then out, preventing multiple cable wires 2 from being scattered and affecting the clamping effect. In this embodiment, the cross-section of the cable gathering through hole 8 is rectangular.

[0024] Furthermore, the elastic limiting kit 5 includes an elastic fixing part 51, an elastic bending part 52, an elastic extension part 53, and an elastic bending frame part 54 connected in sequence. The wire clamping tongue 1 extends to the inner top surface of the elastic bending frame part 54. The elastic fixing part 51 is fixedly connected to the bottom end of the terminal head 3. Both the terminal head 3 and the wire conduit 4 pass through the elastic bending frame part 54. Figure 1 As shown, before the connector terminals are assembled with the stripped cable ends, the inner top surface of the elastic bending frame 54 abuts against the top of the conductor tube 4. Specifically, the inner top surface of the elastic bending frame 54 abuts between the two limiting inclined steps 6 of the conductor tube 4; Figure 4 As shown, when the conduit 4 slides into the terminal head 3, under the guidance of the second limiting inclined step 6, the elastic bending frame 54 slides into the movable clearance portion 42 of the conduit 4. The elastic bending portion 52 and the elastic bending frame 54 deform and reset, causing the pressure tongue 1 to approach the terminal head 3 and press the cable conductor 2. In this embodiment, the elastic fixing portion 51, the elastic bending portion 52, the elastic extension portion 53, the elastic bending frame 54, and the pressure tongue 1 are an integral structure.

[0025] Furthermore, the elastic fixing part 51 has limiting slots 10 on both sides, and the terminal head 3 has bent buckles 11 extending from both sides of its end. The bent buckles 11 and the limiting slots 10 engage one by one, which facilitates the quick assembly of the elastic limiting kit 5 onto the terminal head 3 and ensures the stability of the connection between the elastic limiting kit 5 and the terminal head 3.

[0026] Furthermore, the end of the terminal head 3 has an anti-detachment tooth 12 protruding from it, and the anti-detachment tooth 12 is inclined in a direction away from the beginning of the terminal head 3; when the clamping tongue 1 clamps the cable conductor 2, the anti-detachment tooth 12 and the clamping tongue 1 work together to fasten the cable conductor 2, further improving the connection between the connector terminal and the cable conductor 2, and preventing the cable conductor 2 from being pulled out and detached from the connector terminal.

[0027] Furthermore, the terminal head 3 includes a terminal insertion portion 31, a widened transition portion 32, and a terminal limiting portion 33 connected in sequence. The top surface of the terminal limiting portion 33 has a groove 13 for the wire tube 4 to slide and be limited. The elastic limiting kit 5 is fixedly connected to the bottom surface of the terminal limiting portion 33, and the anti-derailment protrusion 12 protrudes from the groove 13. The widened transition portion 32 and the terminal limiting portion 33 facilitate the sliding and limiting of the wire tube 4. Compared with the conventional terminal head 3, the widened transition portion 32 and the terminal limiting portion 33 added in this invention provide a wider contact area for the cable wire 2 and a larger current flow area, which helps to reduce resistance.

[0028] In this embodiment, the terminal plug-in part 31 is a male pin, which is used to plug and cooperate with the female plug-in.

[0029] Example 2 The difference between this embodiment and Embodiment 1 is that: like Figure 8-10 As shown, in this embodiment, the terminal plug-in part 31 is a female plug sleeve, which is used to plug and cooperate with the male plug pin.

[0030] Example 3 like Figure 5-7 As shown, a connector includes a connecting housing 14 and a plug-in type crimp-free connector terminal for cables as described in Embodiment 1, wherein the plug-in type crimp-free connector terminal for cables is accommodated in the connecting housing 14.

[0031] Furthermore, the inner cavity of the connecting housing 14 has a clearance space 15 for the wire conduit 4 to penetrate into the terminal head 3 and for the elastic limiting kit 5 to deform.

[0032] Example 4 like Figure 11-12 As shown, a connector includes a connecting housing 14 and a plug-in type crimp-free connector terminal for cables as described in Embodiment 2, wherein the plug-in type crimp-free connector terminal for cables is accommodated in the connecting housing 14.

[0033] Furthermore, the inner cavity of the connecting housing 14 has a clearance space 15 for the wire conduit 4 to penetrate into the terminal head 3 and for the elastic limiting kit 5 to deform.

[0034] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A plug-in type crimp-free connector terminal for cables, characterized in that: The device includes a terminal head, a wire tube that is slidably positioned on the terminal head, and an elastic limiting kit that is fixedly connected to the terminal head and engages with the wire tube for limiting and linkage. The elastic limiting kit extends to the terminal head and has a clamping tongue for clamping the cable wire. When the wire tube slides into the terminal head, the elastic limiting kit deforms, causing the clamping tongue to approach the terminal head and clamp the cable wire.

2. The plug-in type crimp-free connector terminal for cables according to claim 1, characterized in that: The conduit includes a guide threading part, a movable clearance part, and a multi-step inclined guide part connected in sequence. The multi-step inclined guide part and the movable clearance part extend into and are slidably positioned at the top end of the terminal head. The multi-step inclined guide part has at least two limiting inclined steps that are inclined away from the movable clearance part. The top of the elastic limiting kit is limited and abuts against the two limiting inclined steps. When the conduit slides into the terminal head, the top of the elastic limiting kit slides relative to the movable clearance part along the limiting inclined steps and deforms, causing the crimping tongue to approach the terminal head and press the cable conductor.

3. The plug-in type crimp-free connector terminal for cables according to claim 2, characterized in that: The guide threading part has a flared guide through hole and a wire gathering through hole connected in sequence along the cable threading direction; the top of the movable clearance part has a clearance groove for the top of the elastic limit kit to press down and move after the elastic limit kit is deformed.

4. The plug-in type crimp-free connector terminal for cables according to claim 1, characterized in that: The elastic limiting kit includes an elastic fixing part, an elastic bending part, an elastic extension part, and an elastic bending frame part connected in sequence. The wire clamping tongue extends to the inner top surface of the elastic bending frame part. The elastic fixing part is fixedly connected to the bottom end of the terminal head. The terminal head and the wire tube both pass through the elastic bending frame part. The inner top surface of the elastic bending frame part abuts against the top of the wire tube. When the wire tube slides into the terminal head, the elastic bending part and the elastic bending frame part deform and reset, causing the wire clamping tongue to approach the terminal head and clamp the cable wire.

5. The plug-in type crimp-free connector terminal for cables according to claim 4, characterized in that: Limiting slots are provided on both sides of the elastic fixing part, and bent buckles extend from both sides of the end of the terminal head, with the bent buckles engaging with the limiting slots one by one.

6. The plug-in type crimp-free connector terminal for cables according to claim 1, characterized in that: The end of the terminal head has a protruding anti-derailment tooth, which is inclined in a direction away from the beginning of the terminal head; when the clamping tongue presses the cable conductor, the anti-derailment tooth and the clamping tongue work together to secure the cable conductor.

7. The plug-in type crimp-free connector terminal for cables according to claim 6, characterized in that: The terminal head includes a terminal insertion part, a widening transition part and a terminal limiting part connected in sequence. The top surface of the terminal limiting part has a sliding groove for the wire conduit to slide. The elastic limiting kit is fixedly connected to the bottom surface of the terminal limiting part, and the anti-derailment protrusion protrudes from the sliding groove.

8. The plug-in type crimp-free connector terminal for cables according to claim 7, characterized in that: The terminal connector is a male pin or a female sleeve.

9. A connector, characterized in that: It includes a connecting housing and a plug-in type crimp-free connector terminal for cables as described in any one of claims 1-8, wherein the plug-in type crimp-free connector terminal for cables is housed in the connecting housing.

10. The connector according to claim 9, characterized in that: The inner cavity of the connecting housing has clearance space for the conduit to penetrate the terminal head and for the elastic limiting kit to deform.

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