Split fish-eye terminal and manufacturing process thereof

Abstract

The present application relates to a split fish-eye terminal and a manufacturing process thereof. The split fish-eye terminal comprises a first elastic arm and a second elastic arm. The first elastic arm comprises a first base, a first deformation part and a first lead-in part. One end of the first deformation part is fixed to the first base, and the other end is fixed to the first lead-in part, and the first deformation part protrudes from the plane where the first base and the first lead-in part are located. The second elastic arm comprises a second base, a second deformation part and a second lead-in part. The second base is fixed to the first base. One end of the second deformation part is fixed to the second base, and the other end is fixed to the second lead-in part, and the second deformation part protrudes from the plane where the second base and the second lead-in part are located. The protruding parts of the second deformation part and the first deformation part are away from each other to form a first fish-eye hole. The split fish-eye terminal adopts a split design, which can increase the deformation stroke, reduce the insertion force of the fish-eye terminal, and reduce the plastic deformation of the fish-eye structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, in particular to a split fish-eye terminal and a manufacturing process thereof. BACKGROUND

[0002] As a key electronic component, an electrical connector is mainly used to connect two independent electronic or electrical devices, so as to realize signal transmission. In recent years, the connector is increasingly widely used in the fields of electronics, communication, aerospace, etc. As a key component in an electronic system, the connection reliability thereof is increasingly concerned. The fish-eye terminal is composed of an interface topology structure to form a contact spring function, to generate a large contact pressure with a PCB hole, to form a solder-free structure, to obtain good mechanical connection performance and conductive performance, so as to realize the pluggable connection of the electrical connector and the PCB.

[0003] The existing fish-eye terminal generally adopts a terminal contact part as a whole to punch and contact with the PCB hole, and the connection reliability is poor. Moreover, the effective deformation stroke of the spring arm formed by the integral punching is limited, and the contact part of the PCB cannot be processed into a more ideal elastic feature, thereby affecting the connection performance. SUMMARY

[0004] Based on this, one of the purposes of the present application is to provide a split fish-eye terminal, which adopts a split design, can increase the deformation stroke, can reduce the insertion force in the use process of the fish-eye terminal, and can effectively reduce the plastic deformation of the fish-eye structure. Another purpose of the present application is to provide a manufacturing process of the split fish-eye terminal, which adopts zoned electroplating for the split fish-eye terminal, effectively reduces the insertion force, and maintains the working stability of the fish-eye terminal.

[0005] A split fish-eye terminal, characterized in that it comprises: a first spring arm and a second spring arm; the second spring arm is fixedly connected to the first spring arm; the first spring arm comprises a first base, a first deformation part and a first lead-in part; one end of the first deformation part is fixedly connected to the first base, the other end is fixedly connected to the first lead-in part, and the first deformation part protrudes from the plane where the first base and the first lead-in part are located; the second spring arm comprises a second base, a second deformation part and a second lead-in part; the second base is fixedly connected to the first base; one end of the second deformation part is fixedly connected to the second base, the other end is fixedly connected to the second lead-in part, and the second deformation part protrudes from the plane where the second base and the second lead-in part are located; the second deformation part is superimposed with the first deformation part, and the protruding parts of the second deformation part and the first deformation part are away from each other to form a first fish-eye hole; and the first lead-in part is superimposed with the second lead-in part.

[0006] The split fish-eye terminal adopts a split design, can increase the deformation stroke, can reduce the insertion force in the use process of the fish-eye terminal, and can effectively reduce the plastic deformation of the fish-eye terminal.

[0007] Further, the first deformation part and the second deformation part are both provided with second fish-eye holes, and the two second fish-eye holes are overlapped with each other, so as to increase the deformation range of the first deformation part and the second deformation part.

[0008] Further, the maximum horizontal distance of the second fish-eye hole is smaller than the maximum horizontal distance of the first fish-eye hole.

[0009] Further, the first deformation part includes a first retaining section, a first lead-in section and a first insertion section; one end of the first retaining section is connected to the first base and is arranged at a certain angle with the first base; the other end of the first retaining section is connected to the first lead-in section; one end of the first insertion section is connected to the first lead-in section and is arranged at a certain angle with the first lead-in section; the other end of the first insertion section is connected to one end of the first lead-in section away from the first retaining section; the width of the first lead-in section is greater than the width of the first retaining section and the first insertion section. The second deformation part includes a second retaining section, a second lead-in section and a second insertion section; one end of the second retaining section is connected to the second base and is arranged at a certain angle with the second base; the other end of the second retaining section is connected to the second lead-in section; one end of the second insertion section is connected to the second lead-in section and is arranged at a certain angle with the second lead-in section; the other end of the second insertion section is connected to one end of the second lead-in section away from the second retaining section; the width of the second lead-in section is greater than the width of the second retaining section and the second insertion section. The first retaining section and the second retaining section are overlapped with each other, the first lead-in section and the second lead-in section are overlapped with each other, and the first insertion section and the second insertion section are overlapped with each other.

[0010] Further, the first retaining section and the second retaining section form a first included angle, and the first insertion section and the second insertion section form a second included angle, and the first included angle is greater than or equal to the second included angle, so that the holding force of the fish-eye terminal can be increased, the plastic deformation of the fish-eye terminal can be effectively reduced, and the fish-eye terminal can be prevented from being pulled out of the jack under vibration.

[0011] Further, the first base is provided with a sunken platform, and the second base is attached to and fixed to the bottom surface of the sunken platform; the second deformation part and the first deformation part are symmetrically arranged along the bottom surface of the sunken platform.

[0012] Further, the first deformation part and the second deformation part are provided with arc-shaped chamfers on the outer side edges in sliding contact with the insertion hole, which prevents the plating layer of the fish-eye terminal and the insertion hole from being scratched during the insertion of the fish-eye terminal into the insertion hole, increases the contact area between the fish-eye terminal and the insertion hole, more evenly distributes the stress from the insertion hole, and can also reduce the contact resistance between the fish-eye terminal and the insertion hole.

[0013] A manufacturing process of a split fish-eye terminal, characterized in that the process comprises the following steps:

[0014] (1) forming a first material strip and a second material strip; the first material strip comprises a plurality of first elastic arms, and the second material strip comprises a plurality of second elastic arms;

[0015] (2) laser welding the first elastic arms and the second elastic arms to obtain a split fish-eye terminal base material;

[0016] (3) electroplating the split fish-eye terminal base material to form a first plating layer;

[0017] (4) performing heat treatment on the split fish-eye terminal obtained in step (3);

[0018] (5) partially electroplating the outer surface of the first plating layer to form a second plating layer;

[0019] In step (5), the electroplating area of the second plating layer is the outer surface of the insertion section and the lead-in part; the surface roughness of the first plating layer is greater than the surface roughness of the second plating layer.

[0020] The manufacturing process of the split fish-eye terminal provided by the application adopts zoned electroplating on the split fish-eye terminal, effectively reduces the insertion force, and maintains the working stability of the fish-eye terminal.

[0021] Further, the first material strip and the second material strip are made of copper; the first plating layer is made of Cu-Sn-Ni alloy, wherein the mass percentage of Cu-Sn-Ni is (5-15):(40-60):(30-50); the thickness of the first plating layer is 0.5-5 μm; and the heat treatment condition in step (4) is constant temperature at 300-600 °C for 0.5-3 min in a protective atmosphere.

[0022] Further, the second plating layer is made of graphene and / or carbon nanotube doped Cu-Sn alloy, wherein the mass percentage of graphene and / or carbon nanotube is 0.2-0.5%; and the thickness of the second plating layer is 0.5-5 μm.

[0023] In order to better understand and implement the application, the application will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1Schematic diagram of the structure of the split-type fisheye terminal provided in the embodiments of this application Figure 1 ;

[0025] Figure 2 Schematic diagram of the structure of the split-type fisheye terminal provided in the embodiments of this application Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the split-type fisheye terminal provided in Example 1;

[0027] Figure 4 This is a schematic diagram of the structure of the split-type fisheye terminal provided in Example 2;

[0028] Figure 5 This is a schematic diagram of the split-type fisheye terminal provided in Example 3;

[0029] Figure 6 This is a schematic diagram of the split-type fisheye terminal provided in Example 4;

[0030] Figure 7 This is a graph showing the insertion and extraction force test results.

[0031] In the diagram: 100-First material strip; 10-First spring arm; 11-First base; 111-Sinking platform; 12-First deformation part; 120-First elastic part; 121-First holding section; 122-First guide section; 123-First insertion section; 124-First connecting part; 13-First guide section; 14-Plug-in part; 200-Second material strip; 20-Second spring arm; 21-Second base; 22-Second deformation part; 220-Second elastic part; 221-Second holding section; 222-Second guide section; 223-Second insertion section; 224-Second connecting part; 23-Second guide section; 30-First fisheye hole; 40-Second fisheye hole. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of the present application, it should be noted that the terms "vertical direction", "upper", "lower", "horizontal", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The present application provides a split fish-eye terminal, which is manufactured by the following process:

[0036] Step (1), stamping forming of metal sheet to form first material belt 100 and second material belt 200, first material belt 100 includes a plurality of arrayed first elastic arms 10, and second material belt 200 includes a plurality of arrayed second elastic arms 20, please refer to Figure 1 .

[0037] In this embodiment, the first material belt 100 and the second material belt 200 are stamped and formed by copper sheet. Please refer to Figure 1 , the first elastic arm 10 includes a one-piece stamping formed first base 11, a first deformation part 12 and a first lead-in part 13; one end of the first deformation part 12 is fixedly connected to the first base 11, the other end is fixedly connected to the first lead-in part 13, and the first deformation part 12 protrudes from the plane where the first base 11 and the first lead-in part 13 are located. The second elastic arm 20 includes a one-piece stamping formed second base 21, a second deformation part 22 and a second lead-in part 23; one end of the second deformation part 22 is fixedly connected to the second base 21, the other end is fixedly connected to the second lead-in part 23, and the second deformation part 22 protrudes from the plane where the second base 21 and the second lead-in part 23 are located.

[0038] The first base 11 is provided with a sunken platform 111, and the second base 21 and the second lead-in part 23 are provided with a plurality of welding holes.

[0039] Step (2), the second material tape 200 is covered on the first material tape 100, the second base 21 is attached to the bottom surface of the sink 111, the second lead-in part 23 is attached to the first lead-in part 13, then laser welding is performed at a plurality of welding hole positions, a plurality of arrayed split fish-eye terminal substrates are formed, the first deformation part 12 and the second deformation part 22 are folded to form the first fish-eye hole 30, please refer to Figure 2 .

[0040] The split fish-eye terminal is formed by welding the first elastic arm 10 and the second elastic arm 20. Compared with the integrally punched fish-eye terminal, a larger deformation stroke can be designed, the insertion force of the fish-eye terminal is reduced, and the plastic deformation of the fish-eye terminal is effectively reduced, so that the stability of the fish-eye terminal under the use condition can be ensured, and the situation that the fish-eye terminal is easily vibrated and pulled out of the insertion hole can be avoided.

[0041] In some other specific embodiments, the first deformation part 12 and the second deformation part 22 can be provided with symmetrical second fish-eye holes 40, and the first deformation part 12 and the second deformation part 22 are respectively separated into two elastic parts by the second fish-eye holes 40, so as to increase the elastic deformation space range of the first deformation part 12 and the second deformation part 22. The second fish-eye hole 40 can be a through hole or a blind hole.

[0042] Further, the first deformation part 12 includes a first retaining segment 121, a first lead-in segment 122 and a first insertion segment 123; one end of the first retaining segment 121 is connected to the first base 11 and is arranged at a certain angle with the first base 11; the other end of the first retaining segment 121 is connected to the first lead-in segment 122. One end of the first insertion segment 123 is connected to the first lead-in part 13 and is arranged at a certain angle with the first lead-in part 13; the other end of the first insertion segment 123 is connected to the first lead-in segment 122 away from the first retaining segment 121. The width of the first lead-in segment 122 is greater than the width of the first retaining segment 121 and the first insertion segment 123.

[0043] The second deformation part 22 includes a second retaining segment 221, a second lead-in segment 222 and a second insertion segment 223; one end of the second retaining segment 221 is connected to the second base 21 and is arranged at a certain angle with the second base 21; the other end of the second retaining segment 221 is connected to the second lead-in segment 222. One end of the second insertion segment 223 is connected to the second lead-in part 23 and is arranged at a certain angle with the second lead-in part 23; the other end of the second insertion segment 223 is connected to the second lead-in segment 222 away from the second retaining segment 221. The width of the second lead-in segment 222 is greater than the width of the second retaining segment 221 and the second insertion segment 223.

[0044] Specifically, for the convenience of describing the process of inserting and pulling out the split fisheye terminal, the first base 11 and the second base 21 are welded to form a base; the first lead-in part 13 and the second lead-in part 23 are welded to form a lead-in part; the first deformation part 12 and the second deformation part 22 are enclosed to form a deformation part. Similarly, the first retaining section 121 and the second retaining section 221 are superimposed to form a retaining section; the first lead-through section 122 and the second lead-through section 222 are superimposed to form a lead-through section; the first insertion section 123 and the second insertion section 223 are superimposed to form an insertion section.

[0045] The process of inserting the fisheye terminal into the jack is divided into three stages: (1) a non-contact stage, that is, when the fisheye terminal lead-in part and part of the insertion section are inserted into the jack, the fisheye terminal is not in contact with the jack and is not under stress because the size of the lead-in part and part of the deformation part is smaller than the diameter of the jack; (2) an insertion stage, that is, when the fisheye terminal is inserted into the jack to a certain depth, the insertion section begins to interfere with the jack and is subjected to a reverse pressure from the jack, and the insertion section drives the first fisheye hole 30 to deform, during which the insertion force increases rapidly until the fisheye terminal deforms to the maximum value, and during this stage, the fisheye terminal receives a static friction force; (3) a sliding stage, that is, after the fisheye terminal deforms, the fisheye terminal is in a stable state, contacts the jack through the lead-through section, and slides in the jack to a specified depth, during which the fisheye terminal is subjected to a sliding friction force. Similarly, the process of pulling out the fisheye terminal from the jack corresponds to three stages: a sliding stage, a pulling-out stage, and a non-contact stage.

[0046] Step (3), the split fisheye terminal substrate obtained in step (2) is cleaned and degreased, and then a first plating process is performed to form a first plating layer.

[0047] The first plating layer is an alloy of Cu, specifically Ag, Ni, Sn, Zn, Fe, Pd, Pt, Ti, Au, and Al two or more; the thickness of the first plating layer is 0.5-5 μm. Preferably, it is a Cu-Sn-Ni alloy, in which the mass percentage of Cu-Sn-Ni is (5-15):(40-60):(30-50).

[0048] Step (4), the split fisheye terminal with the first plating layer obtained in step (3) is subjected to heat treatment, and is heated at a constant temperature of 300-600°C for 0.5-3 min under the protection of a weak reducing atmosphere.

[0049] The Cu in the first plating layer and the Cu of the base material are high-temperature bonded through high-temperature eutectic, and the Sn and Ni components are high-temperature melted and interpenetrate with the base material, so that the adhesion of the first plating layer is stronger. Further, the addition of Ni can increase the hardness of the plating layer to a certain extent, avoid the peeling of the plating layer of the split fish-eye terminal after multiple insertions or pull-outs of the PCB, and thus lose the protection of the base material, while reducing the risk of the split fish-eye terminal due to plastic deformation, and enhancing the working stability of the split fish-eye terminal.

[0050] Step (5), a second electroplating process is performed on the outer surface of the insertion section and the lead-in portion to form a second plating layer, the second plating layer is electroplated with bright tin, and the thickness is 0.5-5 μm.

[0051] Preferably, the surface roughness of the second plating layer is smaller than the surface roughness of the first plating layer, for reducing the static friction of the fish-eye terminal in the insertion stage, while maintaining the sliding friction between the lead-in section and the jack hole when the fish-eye terminal is pulled out, which can effectively increase the stability of the fish-eye terminal in the working process.

[0052] Preferably, the material of the second plating layer is graphene and / or carbon nanotube doped Cu-Sn alloy, wherein the mass percentage of graphene and / or carbon nanotube is 0.2-0.5%, and the mass percentage of Cu is 5-15%. The addition of graphene and / or carbon nanotube in the Cu-Sn alloy can well increase the smoothness and lubricity of the second plating layer, while maintaining good electrical conductivity, which can effectively reduce the static friction in the insertion stage, thereby reducing the insertion force and facilitating the insertion of the fish-eye terminal into the jack hole.

[0053] The structure and performance of the split fish-eye terminal obtained by the above manufacturing process will be specifically described below through specific examples.

[0054] Example 1

[0055] Please refer to Figure 2 and Figure 3 , the embodiment provides a split fish-eye terminal, which comprises a first elastic arm 10 and a second elastic arm 20, and the second elastic arm 20 is laser welded to the first elastic arm 10.

[0056] The first elastic arm 10 comprises a first base 11, a first deformation portion 12 and a first lead-in portion 13 which are integrally stamped and formed; one end of the first deformation portion 12 is fixedly connected to the first base 11, the other end is fixedly connected to the first lead-in portion 13, and the first deformation portion 12 protrudes from the plane where the first base 11 and the first lead-in portion 13 are located. The width of the first deformation portion 12 is greater than the width of the first lead-in portion 13.

[0057] It should be noted that the first base 11 is provided with a needle-shaped or a terminal claw-shaped plug-in part 14 at the end away from the first deformation part 12, which will not be described in detail here.

[0058] The second elastic arm 20 comprises a second base 21, a second deformation part 22 and a second lead-in part 23 formed by one-piece stamping; one end of the second deformation part 22 is fixedly connected to the second base 21, the other end is fixedly connected to the second lead-in part 23, and the second deformation part 22 protrudes from the plane where the second base 21 and the second lead-in part 23 are located. The width of the second deformation part 22 is greater than the width of the second lead-in part 23.

[0059] The first base 11 is provided with a sunken platform 111, the second base 21 and the second lead-in part 23 are provided with a plurality of welding holes, the second base 21 is attached to the bottom surface of the sunken platform 111, the protruding parts of the first deformation part 12 and the second deformation part 22 are away from each other, the first elastic arm 10 is fixedly connected to the second elastic arm 20 by laser welding positioning of the plurality of welding holes, and a folded first fisheye hole 30 is formed.

[0060] Further, in the present embodiment, the width of the first base 11 is consistent with the width of the second base 21, which is the dimension of the first base 11 or the second base 21 perpendicular to the insertion direction; the length of the sunken platform 111 is greater than the length of the second base 21, which is the dimension of the second base 21 along the insertion direction, and a certain tolerance range is left to facilitate the adjustment of the relative positions of the first deformation part 12 and the second deformation part 22 during welding.

[0061] Preferably, in the present embodiment, the first deformation part 12 and the second deformation part 22 are symmetrically arranged along the welding surface. In this way, the first deformation part 12 and the second deformation part 22 can be uniformly stressed, preventing the plastic deformation of one side from being significantly increased due to uneven stress, thereby increasing the risk of failure of the fisheye terminal.

[0062] During the plug-in process, the fisheye terminal is inserted into the insertion hole, the first deformation part 12 and the second deformation part 22 contact the entry end of the insertion hole and move towards each other under extrusion, the first fisheye hole 30 deforms, its length becomes longer and its width becomes narrower, until the deformation of the first fisheye hole 30 ends, and the fisheye terminal slides to a specified depth in the insertion hole in a fixed form.

[0063] Specifically, the first deformation part 12 includes a first holding section 121, a first lead-in section 122 and a first insertion section 123; one end of the first holding section 121 is connected to the first base 11 and is arranged at an angle with the first base 11; the other end of the first holding section 121 is connected to the first lead-in section 122. One end of the first insertion section 123 is connected to the first lead-in part 13 and is arranged at an angle with the first lead-in part 13; the other end of the first insertion section 123 is connected to the other end of the first lead-in section 122 away from the first holding section 121. The width of the first lead-in section 122 is greater than the width of the first holding section 121 and the first insertion section 123.

[0064] The second deformation part 22 includes a second holding section 221, a second lead-in section 222 and a second insertion section 223; one end of the second holding section 221 is connected to the second base 21 and is arranged at an angle with the second base 21; the other end of the second holding section 221 is connected to the second lead-in section 222. One end of the second insertion section 223 is connected to the second lead-in part 23 and is arranged at an angle with the second lead-in part 23; the other end of the second insertion section 223 is connected to the other end of the second lead-in section 222 away from the second holding section 221. The width of the second lead-in section 222 is greater than the width of the second holding section 221 and the second insertion section 223.

[0065] The first holding section 121 and the second holding section 221 form a first included angle, and the first insertion section 123 and the second insertion section 223 form a second included angle. According to the actual use of the fisheye terminal, after the fisheye terminal is inserted into the jack, the upper end of the first fisheye hole 30, i.e. the first holding section 121 and the second holding section 221, is the main area providing holding force for the terminal; while the lower end of the first fisheye hole 30, i.e. the first insertion section 123 and the second insertion section 223, is the main area of plastic deformation. Preferably, the second included angle is less than or equal to the first included angle, so that the first holding section 121 and the second holding section 221 generate greater holding force, effectively reducing the plastic deformation of the fisheye terminal and maintaining the elasticity of the fisheye terminal; at the same time, it prevents the fisheye terminal from being shaken out of the jack, further improving the stability of the fisheye terminal.

[0066] Further, the first deformation part 12 and the second deformation part 22 are provided with arc-shaped chamfers on the outer side edges of the sliding contact with the jack. The arc-shaped chamfers can effectively prevent the outer side edges of the fish-eye terminal from being damaged by sliding under stress during the insertion process, and can also prevent the plating layer on the surface of the fish-eye terminal from being damaged, thereby affecting the conductivity of the fish-eye terminal. At the same time, the arc-shaped chamfers can increase the contact area between the fish-eye terminal and the jack, more evenly distribute the stress from the jack, and also reduce the contact resistance between the fish-eye terminal and the jack. Preferably, the center of the arc-shaped chamfer is collinear with the central axis of the fish-eye terminal. Similarly, in the present embodiment, the first lead-through segment 122 and the second lead-through segment 222 are arranged in parallel to better disperse stress and effectively reduce the contact resistance between the fish-eye terminal and the jack.

[0067] Further, the first deformation part 12 and the second deformation part 22 are symmetrically provided with a second fish-eye hole 40. In the present embodiment, the second fish-eye hole 40 penetrates the first deformation part 12 and the second deformation part 22 and is arranged perpendicular to the first fish-eye hole 30. The first deformation part 12 is cut to form two first elastic parts 120 connected end to end; and the second deformation part 22 is cut to form two second elastic parts 220 connected end to end.

[0068] During the insertion process, the fish-eye terminal is inserted into the jack, the first deformation part 12 and the second deformation part 22 contact the entry end of the jack, the first elastic parts 120 are pressed to move towards the adjacent second elastic parts 220, and at the same time, the movement towards the other first elastic part 120 is increased; similarly, the second elastic parts 220 are pressed to move towards the adjacent first elastic parts 120, and at the same time, the movement towards the other second elastic part 220 is increased, i.e. the two first elastic parts 120 and the two second elastic parts 220 are collectively pressed by the pressure from the jack and are radially folded. In this way, the elasticity of the first deformation part 12 and the second deformation part 22 can be effectively maintained, and the plastic deformation of the first deformation part 12 and the second deformation part 22 can be reduced.

[0069] Further, the maximum horizontal distance of the second fish-eye hole 40 is smaller than the maximum horizontal distance of the first fish-eye hole 30. The first fish-eye hole 30 is formed by laser welding the first elastic arm 10 and the second elastic arm 20 apart from each other, while the second fish-eye hole 40 is formed by one-piece stamping the first elastic arm 10 or the second elastic arm 20. The elasticity of the first fish-eye hole 30 is significantly higher than that of the second fish-eye hole 40, i.e. the deformation stroke between the adjacent first elastic part 120 and the second elastic part 220 is significantly greater than the deformation stroke between the two first elastic parts 120 or the two second elastic parts 220. By adjusting the distance between the first fish-eye hole 30 and the second fish-eye hole 40, the deformation of the first elastic part 120 and the second elastic part 220 after being pressed is more uniform, and the plastic deformation of the first elastic part 120 and the second elastic part 220 is further reduced.

[0070] Preferably, the width of the upper end of the first elastic part 120 is greater than or equal to the width of the lower end, i.e. the width of the first elastic part 120 at the first holding section 121 is greater than the width at the first insertion section 123. In this way, the first holding section 121 generates greater stress, and in turn, greater holding force, which is advantageous for preventing the fish-eye terminal from vibrating and falling off. Similarly, the width of the upper end of the second elastic part 220 is greater than or equal to the width of the lower end.

[0071] Further, the first and second introduction sections 13 and 23 are welded to form a trapezoidal introduction section cross-section, thereby playing a guiding role in the process of inserting the jack.

[0072] Example 2

[0073] Referring to Figure 4 , the embodiment provides a split fish-eye terminal, which differs from the embodiment 1 in that the second fish-eye hole 40 is a blind hole.

[0074] Specifically, the second fish-eye hole 40 is a blind hole formed by punching out a certain depth from the outward facing side of the first and second deformation sections 12 and 22. Correspondingly, the first deformation section 12 is cut to form two first elastic parts 120 on both sides of the blind hole, and a first connecting part 124 for connecting the two first elastic parts 120; the second deformation section 22 is cut to form two second elastic parts 220 on both sides of the blind hole, and a second connecting part 224 for connecting the two second elastic parts 220.

[0075] Example 3

[0076] Referring to Figure 5 , the embodiment provides a split fish-eye terminal, which differs from the embodiment 2 in that the second fish-eye hole 40 is a blind hole formed by punching in a certain depth from the inward facing side of the first and second deformation sections 12 and 22.

[0077] Correspondingly, the first deformation section 12 is cut to form two first elastic parts 120 on both sides of the blind hole, and a first connecting part 124 for connecting the two first elastic parts 120; the second deformation section 22 is cut to form two second elastic parts 220 on both sides of the blind hole, and a second connecting part 224 for connecting the two second elastic parts 220.

[0078] Example 4

[0079] Referring to Figure 6The embodiment provides a split fisheye terminal, compared with the embodiment 2, the difference lies in that the first deformation part 12 and the second deformation part 22 are both provided with two second fisheye holes 40, which are respectively formed by punching blind holes from the opposite and opposite sides of the first deformation part 12 and the second deformation part 22 to a certain depth.

[0080] Correspondingly, the first deformation part 12 is cut to form two first elastic parts 120 located on both sides of the blind hole, and a first connecting part 124 for connecting the two first elastic parts 120; the second deformation part 22 is cut to form two second elastic parts 220 located on both sides of the blind hole, and a second connecting part 224 for connecting the two second elastic parts 220.

[0081] Comparative Example 1

[0082] The embodiment provides an integrated fisheye terminal, which is formed by integrally stamping a copper sheet to form an integrated fisheye terminal, wherein the thickness of the copper sheet is the same as the height of the first base 11 and the second base 21 after welding; the size of the first fisheye hole 30 is the same as the size of the first fisheye hole 30 in the embodiment 1.

[0083] The split fisheye terminals of the embodiments 1-4 and the integrated fisheye terminal of the comparative example 1 are subjected to plug-in force test, and the plug-in force curve obtained is as shown in Figure 7 It can be seen from Figure 7 that in the insertion process, with the insertion of the fisheye terminal, the insertion force basically increases linearly, when the insertion force increases to a certain extent, the fisheye terminal undergoes large yield deformation, until the overall deformation of the fisheye structure occurs, and the insertion force begins to decrease slowly. In the pulling-out process, with the pulling-out of the fisheye terminal, because the fisheye structure has undergone a certain plastic deformation, the pulling-out force rapidly decreases until the elastic deformation is restored. The plug-in performance of the split fisheye terminals of the embodiments 1-4 is obviously better than that of the integrated fisheye terminal of the comparative example 1. Among the comparative examples 1-4, the plug-in performance of the embodiment 1 is the best, which shows that the fisheye structure of the split fisheye terminal provided in the embodiment 1 is more stable, and is more conducive to maintaining the stability of the fisheye terminal.

[0084] Compared with the prior art, the split fisheye terminal and the manufacturing process thereof provided in the embodiment of the application reduce the insertion force by the partition electroplating process, thereby facilitating the insertion of the fisheye terminal into the jack; the hardness of the plating layer is effectively increased by the re-melting heat treatment, the stability of the plating layer is increased, and the holding force of the fisheye terminal is enhanced. In addition, the split fisheye structure can be designed to have a larger deformation stroke, and can effectively reduce the plastic deformation of the fisheye terminal, which is conducive to maintaining good working stability.

[0085] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, and the present application also intends to include these modifications and improvements.

Claims

1. A split fisheye terminal, characterized by, include: A first elastic arm and a second elastic arm; the second elastic arm is fixedly connected to the first elastic arm; the first elastic arm includes a first base, a first deformation part and a first guide part; One end of the first deformable portion is fixed to the first base, and the other end is fixed to the first guide portion, and protrudes from the first base and the first guide portion; the second elastic arm includes a second base, a second deformable portion, and a second guide portion; the second base is fixed to the first base; one end of the second deformable portion is fixed to the second base, and the other end is fixed to the second guide portion, and protrudes from the second base and the second guide portion; the second deformable portion overlaps with the first deformable portion, and the protruding portions of the second deformable portion and the first deformable portion are far apart from each other to form a first fisheye hole, and the first guide portion overlaps with the second guide portion; Both the first deformable part and the second deformable part are provided with a second fisheye hole, and the two second fisheye holes overlap each other; The first deformable portion includes a first retaining section, a first guiding section, and a first insertion section; one end of the first retaining section is connected to the first base and is set at a certain angle to the first base; the other end of the first retaining section is connected to the first guiding section; one end of the first insertion section is connected to the first inlet and is set at a certain angle to the first inlet; the other end of the first insertion section is connected to the end of the first guiding section away from the first retaining section; the width of the first guiding section is greater than the width of the first retaining section and the first insertion section. The second deformable portion includes a second retaining section, a second guiding section, and a second insertion section; one end of the second retaining section is connected to the second base and is set at a certain angle to the second base; the other end of the second retaining section is connected to the second guiding section; one end of the second insertion section is connected to the second inlet and is set at a certain angle to the second inlet; the other end of the second insertion section is connected to the end of the second guiding section away from the second retaining section; the width of the second guiding section is greater than the width of the second retaining section and the second insertion section; the first retaining section and the second retaining section overlap each other, the first guiding section and the second guiding section overlap each other, and the first insertion section and the second insertion section overlap each other.

2. The split fisheye terminal of claim 1, wherein: The maximum horizontal spacing of the second fisheye hole is less than the maximum horizontal spacing of the first fisheye hole.

3. The split fisheye terminal of claim 1, wherein: The first angle formed by the first holding segment and the second holding segment is greater than or equal to the second angle formed by the first insertion segment and the second insertion segment.

4. The split fisheye terminal of claim 1, wherein: The first base is provided with a recessed platform, and the second base is attached to and fixed to the bottom surface of the recessed platform; the second deformable part and the first deformable part are symmetrically arranged along the bottom surface of the recessed platform.

5. The split fisheye terminal of claim 4, wherein: The outer edges of the first and second deformable parts that slide in contact with the socket are cut with arc-shaped chamfers.

6. A manufacturing process of a split fisheye terminal according to claim 1, characterized by, Includes the following steps: (1) Forming a first strip and a second strip; wherein the first strip includes a plurality of first elastic arms and the second strip includes a plurality of second elastic arms; (2) Laser welding the first spring arm and the second spring arm to obtain a split fisheye terminal substrate; (3) Electroplating is performed on the substrate of the split fisheye terminal to form the first plating layer; (4) heat treating the split fisheye terminal obtained in step (3); (5) performing partial electroplating on the first plating layer to form a second plating layer; In step (5), the electroplating area of the second plating layer is the outer surface of the insertion section and the lead-in portion; the surface roughness of the first plating layer is greater than that of the second plating layer.

7. The manufacturing process of claim 6, wherein: The material of the first material belt and the second material belt is copper; the material of the first plating layer is Cu-Sn-Ni alloy, wherein the mass percentage of Cu-Sn-Ni is (5-15):(40-60):(30-50); the thickness of the first plating layer is 0.5-5 μm; the heat treatment condition in step (4) is constant temperature at 300-600 ℃ for 0.5-3 min in a protective atmosphere.

8. The manufacturing process of claim 7, wherein: The material of the second plating layer is graphene and / or carbon nanotube doped Cu-Sn alloy, wherein the mass percentage of graphene and / or carbon nanotube is 0.2-0.5%; the thickness of the second plating layer is 0.5-5 μm.

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