A dual fisheye piercing crimp terminal

Abstract

The utility model relates to crimping terminal technical field especially discloses a kind of double fish eye puncture crimping terminals, including base, the connecting portion integrally formed with base;The connecting portion includes the first connecting section being connected with base, the first plug-in section being connected with the first connecting section and the pin section being connected with the first plug-in section, and the first plug-in section includes two groups of strip body part, the support part connecting two groups of strip body part, two groups of strip body part are collectively enclosed to form a crimping part, the support part both ends are connected with first group of strip body part, second group of strip body part, and the first hole body and the second hole body located in the support part both sides are equipped in crimping part.Double fish eye puncture crimping terminal is formed by setting up two groups of symmetric strip body part to enclose crimping part, and cooperate the first and second hole body of support part both sides to constitute double fish eye structure, can be realized to the stable crimping of wire by double hole body.

Description

Technical Field

[0001] This utility model relates to the field of crimp terminal technology, and in particular discloses a double fisheye piercing crimp terminal. Background Technology

[0002] Traditional piercing crimp terminals typically use a single crimping structure to contact the wire, resulting in insufficient crimping stability and excessive contact resistance due to the small contact area. While some terminals employ multi-contact designs, poorly designed elastic support structures can lead to elastic fatigue and loosening under insertion, removal, or vibration conditions. Furthermore, the mating of existing terminals with external connectors often suffers from high insertion / removal resistance and easy pin wear due to missing or uneven guide structures. Additionally, improperly designed positioning and locking structures between the base and the external connector can cause misalignment after assembly, affecting overall connection reliability. Moreover, the edges of the holes in traditional piercing structures are often right angles, which not only easily lead to incomplete piercing of the wire insulation but may also cause stress concentration, damaging the terminal structure itself and shortening its lifespan. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a double fisheye piercing crimp terminal.

[0004] To achieve the above objectives, this utility model provides a double fisheye piercing crimp terminal, comprising a base and a connecting portion integrally formed with the base; the connecting portion includes a first connecting section connected to the base, a first insertion section connected to the first connecting section, and a pin section connected to the first insertion section; the first insertion section includes two sets of strip portions and a support portion connecting the two sets of strip portions; the two sets of strip portions together form a crimp portion; the two ends of the support portion are respectively connected to the first set of strip portions and the second set of strip portions; the crimp portion is provided with a first hole and a second hole located on both sides of the support portion.

[0005] The connecting parts can be two or more sets, such as Figure 1 As shown, the two sets of connecting parts have the same structure.

[0006] The double-fisheye crimping terminal uses two sets of symmetrical strip sections to form a crimping part, which, together with the first and second holes on the upper and lower parts of the support section, constitutes a double-fisheye structure. This double-hole structure enables stable crimping of the wires and better disperses the crimping stress between the external connector and the crimping part during the crimping process, increasing the contact area and connection reliability. The connection design between the support section and the strip section enhances the elastic deformation capability of the crimping part, adapting to wires of different diameters and maintaining sustained pressure, reducing contact loosening under vibration. The one-piece molded base and connection structure ensures overall strength, while the structural design of the pin section and base facilitates precise mating with external connectors, reducing insertion and extraction resistance and wear. It is suitable for wire harness assembly scenarios requiring fast and stable electrical connections, and can significantly improve connection stability and service life, especially in vibration environments such as automobiles and home appliances.

[0007] The shape of the hole is an equilateral triangle, an acute triangle, or an isosceles triangle.

[0008] The stability of the triangular structure allows the edge of the hole to be evenly stressed during crimping, avoiding structural deformation caused by excessive local stress. At the same time, different triangular shapes can be adapted to the insulation layer thickness and hardness of wires of different specifications, improving the versatility and crimping reliability of the terminal. Combined with the symmetrical double fisheye structure, it further enhances the multi-point contact effect with the wire.

[0009] The support portion includes a first main body portion connected to the first group of strip portions and a second main body portion connected to the second group of strip portions. The end of the first main body portion away from the first group of strip portions is connected to the end of the second main body portion away from the second group of strip portions.

[0010] The support section is connected to the first set of strip sections via a first main body section and to the second set of strip sections via a second main body section. The ends of the two main bodies section furthest from the strip sections are connected to each other, forming a symmetrical and stable support structure. This design provides reliable connection points for the two sets of strip sections, enhancing the overall structural strength of the crimping section. It also disperses stress through the synergistic effect of the main bodies when the strip sections are subjected to deformation, preventing localized overload. Simultaneously, it ensures that the strip sections maintain a symmetrical deformation state during crimping, guaranteeing uniform and consistent piercing and crimping effects of the first and second holes on the wires, thus improving connection stability.

[0011] The main body includes a first boss and a trapezoidal boss integrally formed with the first boss. The outer diameter of the trapezoidal boss at the end closer to the first boss is larger than the outer diameter of the trapezoidal boss at the end farther from the first boss. The trapezoidal boss of the first main body is connected to the trapezoidal boss of the second main body.

[0012] The front end face of the trapezoidal boss of the first main body and the front end face of the trapezoidal boss of the second main body form a first angle, and the rear end face of the trapezoidal boss of the first main body and the rear end face of the trapezoidal boss of the second main body form a second angle.

[0013] The main body adopts a structure in which the first boss and the trapezoidal boss are integrally formed, and the trapezoidal bosses of the first main body and the second main body are connected. This can not only form a gradual support by using the inclined side of the trapezoidal boss to enhance the overall rigidity of the support and stabilize the deformation trajectory of the strip, but also use the first boss to improve the structural strength at the connection point with the strip, so as to avoid the connection point from breaking due to repeated deformation. The front end face of the trapezoidal bosses of the first main body and the second main body form a first included angle and the rear end face forms a second included angle. This symmetrical included angle design can make the support more evenly stressed during pressing, guide the strip to deform symmetrically towards the center of the pressing part, and further improve the stability and reliability of pressing.

[0014] The degree measure of the first included angle is the same as that of the second included angle.

[0015] The first included angle has the same degree value as the second included angle, enabling the trapezoidal bosses of the first and second main bodies to form a completely symmetrical structure in the front-to-back direction. This symmetrical design ensures that the feedback force from the strip portion in the front-to-back direction is evenly distributed during the crimping process, preventing the support portion from tilting to one side due to angle differences. This, in turn, ensures symmetrical deformation of the two sets of strip portions and stability of the center position of the crimping portion, further improving the stability and consistency of the terminal crimping from a structural perspective.

[0016] All corners of the hole are rounded.

[0017] The rounded corner structure reduces the local stress intensity of the strip body during deformation pressing, increases the interference contact points, improves the insertion and extraction force, makes the stress distribution around the hole body more uniform, and improves the overall structural stability of the pressing part.

[0018] A rounded transition surface is provided between the outer side, front end, and rear end of the strip.

[0019] The use of rounded transition surfaces between the outer surface, front end, and rear end of the strip effectively eliminates stress concentration points at the joints of the various surfaces of the strip, preventing cracks or fractures caused by excessive local stress during repeated pressing and deformation, thus extending the fatigue life of the strip. At the same time, the rounded transition surfaces reduce the frictional resistance between the strip and the inner wall of the external connector, making the terminals easier to insert and remove and reducing assembly difficulty. In addition, the smooth transition surfaces also prevent the edges of the strip from scratching the wire insulation or the operator, improving safety and ease of operation.

[0020] The base side is provided with positioning protrusions for engaging with the insulating body of an external connector, and the base center is provided with a snap-fit ​​groove opened along the length of the base. The snap-fit ​​groove is used to accommodate external conductive wires, and the groove diameter at the end of the snap-fit ​​groove near the connection part is smaller than the groove diameter at the end of the snap-fit ​​groove away from the connection part.

[0021] The positioning protrusions on the side of the base can form a firm engagement with the insulating body of the external connector. The mechanical interlocking action of the protrusions secures the terminal circumferentially within the insulating body, preventing rotation or displacement of the terminal due to vibration, insertion, or other external forces after assembly, ensuring the alignment accuracy between the crimping part and the external circuitry. The locking groove in the middle of the base is set along the length direction, with the groove diameter closer to the connection being smaller than that further away, forming a "gradually narrowing" structure. The wider entry end facilitates quick insertion of the conductor. As the conductor enters, the gradually narrowing groove exerts a continuously increasing radial clamping force on the conductor. During the piercing process after the conductor is inserted, it works in conjunction with the crimping part of the connection to form "double fixation," preventing loosening or displacement of the conductor before crimping and adapting to the initial positioning requirements of conductors of different diameters through the difference in groove diameter, significantly improving assembly efficiency. This structural design, addressing both circumferential positioning and conductor pre-fixation, comprehensively enhances the stability and ease of assembly of the terminal connection to external components.

[0022] The pin segment includes a first oblique surface and a second oblique surface that are symmetrical front and back, and a third oblique surface and a fourth oblique surface that are symmetrical left and right. The bottom end face of the pin segment is arc-shaped. The first oblique surface, the second oblique surface, the third oblique surface, and the fourth oblique surface together form a conical guide structure to reduce insertion and extraction resistance. The arc-shaped end face at the bottom of the pin segment is used to reduce wear during insertion and extraction.

[0023] The pin segment forms a tapered guide structure through symmetrical first and second beveled surfaces and symmetrical third and fourth beveled surfaces. This structure, when the pin segment is inserted into the corresponding hole of the external connector, facilitates a smoother insertion and removal process through the guiding effect of the beveled surfaces, effectively reducing insertion and removal resistance and minimizing the effort required during assembly. Simultaneously, the arc-shaped end face at the bottom of the pin avoids the hard friction between the traditional flat or pointed end face and the inner wall of the hole during insertion and removal. The smooth contact of the arc surface reduces wear and extends the service life of both the pin segment and the external connector. This design balances ease of insertion and removal with structural durability, making it particularly suitable for scenarios requiring frequent insertion and removal or demanding high assembly efficiency.

[0024] The beneficial effects of this utility model are as follows: This utility model uses a double-fisheye double-hole structure composed of two sets of symmetrical strip parts and a support part. Combining the stable force-bearing characteristics of the triangular hole and the stress dispersion design of the rounded corners, it achieves multi-point stable crimping of the wires, improving the contact area and connection reliability. The support part adopts a symmetrical connection of the first and second main parts and a symmetrical angle design of the trapezoidal boss. With the connection strength enhanced by the first boss, it guides the symmetrical deformation of the strip part, ensuring uniform crimping and adapting to wires of different diameters, reducing vibration and loosening. The arc transition surface of the strip part, the positioning protrusions and gradually shrinking snap-fit ​​groove of the base part, the conical guide of the plug section and the arc end face and other detailed designs further reduce stress concentration, improve assembly stability and plug-in convenience, reduce wear and operation difficulty. The overall structure is integrally molded with high strength and is suitable for vibration environments such as automobiles and home appliances. It can significantly improve the stability, durability and assembly efficiency of electrical connections. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 The overall three-dimensional structure of this utility model Figure 1 ;

[0027] Figure 3 For the present utility model Figure 2 A magnified structural diagram of part A in the middle;

[0028] Figure 4 The overall three-dimensional structure of this utility model Figure 2 .

[0029] The reference numerals in the figures include:

[0030] 1. Base; 2. Connecting part; 3. First connecting section; 4. First insertion section; 5. Pin section; 6. Strip body; 7. Support part; 8. Pressing part; 9. First hole; 11. Second hole; 12. First main body; 13. Second main body; 14. First boss; 15. Trapezoidal boss; 16. First included angle; 17. Second included angle; 18. Arc transition surface; 19. Positioning protrusion; 21. Snap-fit ​​groove; 22. First oblique cut surface; 23. Second oblique cut surface; 24. Third oblique cut surface; 25. Fourth oblique cut surface; 26. Arc-shaped end face. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1 to 4As shown, a double fisheye piercing crimp terminal of this utility model includes a base 1 and a connecting part 2 integrally formed with the base 1; the connecting part 2 includes a first connecting section 3 connected to the base 1, a first insertion section 4 connected to the first connecting section 3, and a pin section 5 connected to the first insertion section 4. The first insertion section 4 includes two sets of strip parts 6 and a support part 7 connecting the two sets of strip parts 6. The two sets of strip parts 6 together form a crimping part 8. The two ends of the support part 7 are respectively connected to the first set of strip parts 6 and the second set of strip parts 6. The crimping part 8 is provided with a first hole 9 and a second hole 11 located on both sides of the support part 7.

[0033] The connecting part 2 can be two or more sets, such as Figure 1 As shown, the two sets of connecting parts 2 have the same structure.

[0034] The double fisheye piercing crimp terminal is formed by two sets of symmetrical strip sections 6 surrounding the crimp section 8, and together with the first and second holes 11 on the upper and lower parts of the support section 7, it forms a double fisheye structure. The double holes can achieve stable crimping of the wires, and during the crimping process, the double hole structure can better disperse the crimping stress between the external connector and the crimp section 8, improving the contact area and connection reliability. The connection design between the support section 7 and the strip section 6 enhances the elastic deformation capability of the crimp section 8, which can adapt to wires of different diameters and maintain lasting pressure, reducing contact loosening in vibration environments. The one-piece molded base 1 and connecting section 2 structure ensures overall strength, while the structural design of the pin section 5 and the base 1 facilitates precise matching with external connectors, reducing insertion and extraction resistance and wear. It is suitable for wire harness assembly scenarios that require fast and stable electrical connections, and can significantly improve connection stability and service life, especially in vibration environments such as automobiles and home appliances.

[0035] The shape of the hole is an equilateral triangle, an acute triangle, or an isosceles triangle.

[0036] The stability of the triangular structure allows the edge of the hole to be evenly stressed during crimping, avoiding structural deformation caused by excessive local stress. At the same time, different triangular shapes can be adapted to the insulation layer thickness and hardness of wires of different specifications, improving the versatility and crimping reliability of the terminal. Combined with the symmetrical double fisheye structure, it further enhances the multi-point contact effect with the wire.

[0037] The support portion 7 includes a first main body portion 12 connected to the first group of strip portions 6 and a second main body portion 13 connected to the second group of strip portions 6. The end of the first main body portion 12 away from the first group of strip portions 6 is connected to the end of the second main body portion 13 away from the second group of strip portions 6.

[0038] The support part 7 is connected to the first set of strip parts 6 via the first main body part 12 and to the second set of strip parts 6 via the second main body part 13. The ends of the two main bodies away from the strip parts 6 are connected to each other, forming a symmetrical and stable support structure. This design provides reliable connection points for the two sets of strip parts 6, enhancing the overall structural strength of the crimping part 8. It also disperses stress through the synergistic effect of the main bodies when the strip parts 6 are deformed, avoiding local overload. At the same time, it ensures that the strip parts 6 maintain a symmetrical deformation state during the crimping process, ensuring that the piercing and crimping effect of the first and second holes 11 on the wires is uniform and consistent, thus improving the connection stability.

[0039] The main body includes a first boss 14 and a trapezoidal boss 15 integrally formed with the first boss 14. The outer diameter of the trapezoidal boss 15 at the end near the first boss 14 is larger than the outer diameter of the trapezoidal boss 15 at the end away from the first boss 14. The trapezoidal boss 15 of the first main body 12 is connected to the trapezoidal boss 15 of the second main body 13.

[0040] The front end face of the trapezoidal boss 15 of the first main body 12 and the front end face of the trapezoidal boss 15 of the second main body 13 form a first included angle 16, and the rear end face of the trapezoidal boss 15 of the first main body 12 and the rear end face of the trapezoidal boss 15 of the second main body 13 form a second included angle 17.

[0041] The main body adopts a structure in which the first boss 14 and the trapezoidal boss 15 are integrally formed, and are connected to the trapezoidal boss 15 of the first main body 12 and the second main body 13. It can form a gradual support with the inclined side of the trapezoidal boss 15, enhance the overall rigidity of the support part 7 to stabilize the deformation trajectory of the strip part 6, and use the first boss 14 to improve the structural strength at the connection position with the strip part 6, so as to avoid the connection point from breaking due to repeated deformation. The front end face of the trapezoidal boss 15 of the first main body 12 and the second main body 13 forms a first included angle 16 and the rear end face forms a second included angle 17. This symmetrical included angle design can make the support part 7 more evenly stressed during pressing, guide the strip part 6 to deform symmetrically towards the center of the pressing part 8, and further improve the stability and reliability of pressing.

[0042] The degree measure of the first included angle 16 is the same as that of the second included angle 17.

[0043] The first included angle 16 has the same degree value as the second included angle 17, which enables the trapezoidal bosses 15 of the first main body 12 and the second main body 13 to form a completely symmetrical structure in the front-back direction. This symmetrical design ensures that the feedback force from the strip portion 6 on the support portion 7 is evenly distributed in the front-back direction during the crimping process, avoiding the support portion 7 from tilting to one side due to angle differences. This ensures symmetrical deformation of the two sets of strip portions 6 and stability of the center position of the crimping portion 8, further improving the stability and consistency of the terminal crimping from a structural perspective.

[0044] All corners of the hole are rounded.

[0045] The rounded corner structure at the corners can reduce the local stress intensity of the strip part 6 during deformation pressing, increase the interference contact points, improve the insertion and extraction force, make the stress distribution around the hole more uniform, and improve the overall structural stability of the pressing part 8.

[0046] A circular arc transition surface 18 is provided between the outer side, front end, and rear end of the strip portion 6.

[0047] A rounded transition surface 18 is provided between the outer side, front end, and rear end of the strip body 6. This effectively eliminates stress concentration points at the joints of the various surfaces of the strip body 6, preventing cracks or fractures in the strip body 6 due to excessive local stress during repeated pressing and deformation, and extending the fatigue life of the strip body 6. At the same time, the rounded transition surface 18 reduces the frictional resistance between the strip body 6 and the inner wall of the external connector, making the terminals easier to insert and remove and reducing assembly difficulty. In addition, the smooth transition surface can also prevent the edges of the strip body 6 from scratching the wire insulation layer or operators, improving safety and ease of operation.

[0048] The base 1 has a positioning protrusion 19 on its side for engaging with the insulating body of an external connector. The base 1 has a snap-fit ​​groove 21 in the middle along the length of the base 1. The snap-fit ​​groove 21 is used to accommodate external conductive wires. The groove diameter of the snap-fit ​​groove 21 near the connecting part 2 is smaller than the groove diameter of the snap-fit ​​groove 21 away from the connecting part 2.

[0049] The positioning protrusions 19 on the side of the base 1 can form a firm engagement with the insulating body of the external connector. The mechanical interlocking action of the protrusions achieves circumferential fixation of the terminal in the insulating body, preventing the terminal from rotating or shifting due to external forces such as vibration and insertion after assembly, and ensuring the alignment accuracy between the crimping part 8 and the external circuit. The snap-fit ​​groove 21 in the middle of the base 1 is set along the length direction, and the groove diameter at the end near the connecting part 2 is smaller than that at the end away from the connecting part 2, forming a "gradually shrinking" structure. The wider entrance end facilitates the quick insertion of the conductor. As the conductor enters, the gradually narrowing groove forms a continuously enhanced radial clamping force on the conductor. During the process of the conductor being punctured after insertion, it works with the crimping part 8 of the connecting part 2 to form "double fixation". This not only prevents the conductor from loosening or shifting before crimping, but also adapts to the initial positioning requirements of conductors of different diameters through the difference in groove diameter, greatly improving assembly efficiency. This structural design, through circumferential positioning and wire pre-fixation, comprehensively enhances the stability and ease of assembly of the connection between the terminal and external components.

[0050] The pin segment 5 includes a first oblique surface 22 and a second oblique surface 23 that are symmetrical front and back, and a third oblique surface 24 and a fourth oblique surface 25 that are symmetrical left and right. The bottom end face of the pin segment 5 is arc-shaped. The first oblique surface 22, the second oblique surface 23, the third oblique surface 24, and the fourth oblique surface 25 together form a conical guide structure to reduce insertion and extraction resistance. The arc-shaped end face 26 at the bottom of the pin segment 5 is used to reduce wear during insertion and extraction.

[0051] The pin segment 5 forms a tapered guide structure through the symmetrical first and second oblique cut surfaces 23 and the symmetrical third and fourth oblique cut surfaces 25. This structure, when the pin segment 5 is inserted into the corresponding hole of the external connector, facilitates smoother insertion and removal through the guiding effect of the oblique surfaces, effectively reducing insertion and removal resistance and minimizing the operational effort during assembly. Simultaneously, the arc-shaped end face 26 at the bottom of the pin avoids the hard friction between the traditional flat or pointed end face and the inner wall of the hole during insertion and removal. The smooth contact of the arc surface reduces wear and extends the service life of both the pin segment 5 and the external connector. This design balances ease of insertion and removal with structural durability, making it particularly suitable for scenarios requiring frequent insertion and removal or demanding high assembly efficiency.

[0052] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A double-fisheye piercing crimp terminal, characterized in that: It includes a base (1) and a connecting part (2) integrally formed with the base (1); the connecting part (2) includes a first connecting section (3) connected to the base (1), a first plug section (4) connected to the first connecting section (3) and a plug section (5) connected to the first plug section (4). The first plug section (4) includes two sets of strip sections (6) and a support section (7) connecting the two sets of strip sections (6). The two sets of strip sections (6) together form a crimping part (8). The two ends of the support section (7) are respectively connected to the first set of strip sections (6) and the second set of strip sections (6). The crimping part (8) is provided with a first hole (9) and a second hole (11) located on both sides of the support section (7).

2. The double fisheye piercing crimp terminal according to claim 1, characterized in that: The shape of the hole is an equilateral triangle, an acute triangle, or an isosceles triangle.

3. The double fisheye piercing crimp terminal according to claim 1, characterized in that: The support part (7) includes a first main body part (12) connected to the first group of strip parts (6) and a second main body part (13) connected to the second group of strip parts (6). The end of the first main body part (12) away from the first group of strip parts (6) is connected to the end of the second main body part (13) away from the second group of strip parts (6).

4. The double fisheye piercing crimp terminal according to claim 3, characterized in that: The main body includes a first boss (14) and a trapezoidal boss (15) integrally formed with the first boss (14). The outer diameter of the trapezoidal boss (15) near the first boss (14) is larger than the outer diameter of the trapezoidal boss (15) away from the first boss (14). The trapezoidal boss (15) of the first main body (12) is connected to the trapezoidal boss (15) of the second main body (13).

5. A double-fisheye piercing crimp terminal according to claim 4, characterized in that: The front end face of the trapezoidal boss (15) of the first main body (12) and the front end face of the trapezoidal boss (15) of the second main body (13) form a first angle (16), and the rear end face of the trapezoidal boss (15) of the first main body (12) and the rear end face of the trapezoidal boss (15) of the second main body (13) form a second angle (17).

6. A double-fisheye piercing crimp terminal according to claim 5, characterized in that: The degree measure of the first included angle (16) is the same as that of the second included angle (17).

7. A double-fisheye piercing crimp terminal according to claim 2, characterized in that: All corners of the hole are rounded.

8. The double fisheye piercing crimp terminal according to claim 1, characterized in that: The outer side, front end and rear end of the strip part (6) are all provided with arc transition surfaces (18).

9. A double-fisheye piercing crimp terminal according to claim 1, characterized in that: The base (1) has a positioning protrusion (19) on its side for engaging with the insulating body of an external connector. The base (1) has a snap-fit ​​groove (21) in the middle along the length of the base (1). The snap-fit ​​groove (21) is used to accommodate external conductor wires. The groove diameter of the snap-fit ​​groove (21) near the connecting part (2) is smaller than the groove diameter of the snap-fit ​​groove (21) away from the connecting part (2).

10. A double-fisheye piercing crimp terminal according to claim 1, characterized in that: The pin segment (5) includes a first oblique surface (22) and a second oblique surface (23) that are symmetrical front and back, and a third oblique surface (24) and a fourth oblique surface (25) that are symmetrical left and right. The bottom end face of the pin segment (5) is arc-shaped. The first oblique surface (22), the second oblique surface (23), the third oblique surface (24), and the fourth oblique surface (25) together form a conical guide structure to reduce insertion and extraction resistance. The arc-shaped end face (26) at the bottom of the pin segment (5) is used to reduce wear during insertion and extraction.

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