Wire end connector assembly and wire end connector system

Abstract

The utility model discloses a kind of wire end connector assembly and wire end connector system, it is related to connector technical field, wherein, wire end connector assembly includes PCB board and cable, the surface of PCB board is equipped with pad;Cable includes wire core, insulating layer and shielding layer, wire core includes the main part and bending part connected, the axis of main part and the axis of bending part are obtuse angle setting, bending part and pad welding connection, insulating layer is set to the outside of main part, shielding layer is set to the outside of insulating layer.The wire end connector assembly provided by the utility model aims at preventing wire core exposed after insulating layer in cable is hot extruded deformation, reduce the bad rate of product.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a wire-end connector assembly and a wire-end connector system. Background Technology

[0002] When heat-sensitive cables are soldered to PCB boards, the finished product usually has the cables and PCB boards on the same horizontal plane in the vertical direction. The insulation layer in the cables has poor heat resistance and will be deformed by the thermal pressure of the PCB board.

[0003] To solve the above problems, the cable is usually bent at almost 90 degrees and soldered to the PCB board so that the unbent part of the cable is away from the PCB board, thus solving the problem of thermal extrusion deformation. However, the cable deformed by thermal extrusion will cause the core to be exposed, which can easily cause short circuits. Utility Model Content

[0004] The main purpose of this invention is to provide a wire end connector assembly and a wire end connector system, which aims to prevent the wire core from being exposed after the insulation layer in the cable is deformed by thermal extrusion, thereby reducing the product defect rate.

[0005] To achieve the above objectives, the present invention proposes a wire-end connector assembly comprising a PCB board and a cable. The surface of the PCB board is provided with solder pads. The cable comprises a wire core, an insulation layer, and a shielding layer. The wire core comprises a main body and a bent portion connected together. The axis of the main body and the axis of the bent portion are set at an obtuse angle. The bent portion is welded to the solder pads. The insulation layer is sleeved outside the main body, and the shielding layer is sleeved outside the insulation layer.

[0006] In one embodiment, the bent portion includes a first portion and a second portion, the first portion being connected to the main body at an obtuse angle, the second portion being connected to the first portion at an obtuse angle, and the second portion being used for welding connection with the solder pad.

[0007] In one embodiment, the angle between the first portion and the main body is 120 degrees to 150 degrees; The angle between the second part and the first part is 120 to 150 degrees.

[0008] In one embodiment, the extension direction of the second portion is parallel to the extension direction of the main body portion.

[0009] In one embodiment, the connection between the main body and the first part is a rounded corner; And / or, the connection between the first part and the second part is rounded.

[0010] In one embodiment, the ratio between the length of the bent portion in the axial direction and the length of the main body portion in the axial direction is greater than or equal to 0.05 and less than or equal to 0.1.

[0011] In one embodiment, the cable includes a plurality of wire cores arranged side by side, and the bending portions of the plurality of wire cores extend in the same direction; The PCB board has multiple spaced solder pads on its surface, and the bent portion of one of the wire cores is soldered to one of the solder pads.

[0012] In one embodiment, the shielding layer is a non-woven structure that is conductive on one side.

[0013] This utility model also proposes a wire end connector system, which includes a wire end connector assembly as described above and a bending fixture, wherein the bending fixture is used to bend the wire core to form the bent portion.

[0014] In one embodiment, the bending fixture includes an upper die and a lower die, a stamping groove is formed between the upper die and the lower die, the edge of the stamping groove is rounded, and the upper die can move relative to the lower die to stamp the wire core to form the bent portion.

[0015] The wire connector assembly in this utility model includes a PCB board and a cable. The cable includes a wire core, an insulation layer, and a shielding layer. The wire core includes a main body and a bent part connected at an obtuse angle. The insulation layer and the shielding layer are both disposed on the outer periphery of the main body. The bent part is soldered to the solder pads of the PCB board. At this time, a height difference is formed between the main body and the PCB board, and the insulation layer will not be subjected to thermal compression by the PCB board and will not deform. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a structure of an embodiment of the wire end connector assembly provided by this utility model; Figure 2 A schematic diagram of another embodiment of the wire-end connector assembly provided by this utility model.

[0018] Explanation of icon numbers: 10. Wire connector assembly; 1. PCB board; 11. Solder pad; 2. Cable; 21. Wire core; 211. Main body; 212. Bending part; 2121. First part; 2122. Second part; 22. Insulation layer; 23. Shielding layer.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] When heat-sensitive cables are soldered to PCB boards, the finished product usually has the cables and PCB boards on the same horizontal plane in the vertical direction. The insulation layer in the cables has poor heat resistance and will be deformed by the thermal pressure of the PCB board.

[0024] To solve the above problems, the cable is usually bent at almost 90 degrees and soldered to the PCB board so that the unbent part of the cable is away from the PCB board, thus solving the problem of thermal extrusion deformation. However, the bent cable will expose the wire core, which can easily cause a short circuit.

[0025] This utility model proposes a wire end connector assembly and a wire end connector system, which aims to prevent the wire core from being exposed after the insulation layer in the cable is deformed by thermal extrusion, thereby reducing the product defect rate.

[0026] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the wire connector assembly 10 includes a PCB board 1 and a cable 2. The surface of the PCB board 1 is provided with solder pads 11. The cable 2 includes a wire core 21, an insulation layer 22 and a shielding layer 23. The wire core 21 includes a main body portion 211 and a bent portion 212 connected to each other. The axis of the main body portion 211 and the axis of the bent portion 212 are set at an obtuse angle. The bent portion 212 is welded to the solder pads 11. The insulation layer 22 is sleeved outside the main body portion 211 and the shielding layer 23 is sleeved outside the insulation layer 22.

[0027] In this embodiment, the obtuse angle connection is an angle greater than 90 degrees between the two structural components, which can be achieved using a stamping process. This angle design reduces stress concentration at the bend. The solder pad 11 is a conductive area on the surface of the PCB board 1, which can be achieved using a copper foil etching process, and is used to establish an electrical connection. The main body 211 is the straight section of the wire core 21 that is not bent, which can be achieved by cutting the wire to a fixed length, and serves as the main load-bearing structure of the cable 2. The bent section 212 is the bent section at the end of the wire core 21, which can be achieved using a die stamping process, and is used to form a welding interface with the solder pad 11. The insulating layer 22 is a non-conductive material covering the conductor, which can be achieved using an extrusion molding process, forming a complete cover for the main body 211. The shielding layer 23 is a conductive material covering the insulating layer 22, which can be achieved using an aluminum foil wrapping process, forming an electromagnetic shielding structure.

[0028] The solder pads 11 on PCB board 1 provide a planar soldering base for the wire cores 21. The wire cores 21 are spatially distributed through obtuse-angle bends, creating an inclined angle between the main body 211 and PCB board 1. This angle design keeps the insulating layer 22 away from the high-temperature soldering area, preventing deformation due to heat. The bent portion 212 is directly soldered to the solder pads 11 to establish an electrical path. The insulating layer 22 precisely covers the main body 211, ensuring that the conductor in the soldering area is exposed while providing continuous protection for the non-soldered areas. The layered structure of the shielding layer 23 covered by the insulating layer 22, when performing electromagnetic shielding, physically isolates the shielding layer 23 from the wire cores 21 through the insulating layer 22, preventing short circuits.

[0029] The wire connector assembly 10 in the technical solution of this utility model includes a PCB board 1 and a cable 2. The cable 2 includes a wire core 21, an insulation layer 22 and a shielding layer 23. The wire core 21 includes a main body 211 and a bent part 212 connected at an obtuse angle. The insulation layer 22 and the shielding layer 23 are both disposed on the outer periphery of the main body 211. The bent part 212 is soldered to the solder pad 11 of the PCB board 1. At this time, a height difference is formed between the main body 211 and the PCB board 1. The insulation layer 22 will not be subjected to thermal compression by the PCB board 1 and will not deform.

[0030] In an embodiment of this utility model, the bending portion 212 includes a first portion 2121 and a second portion 2122. The first portion 2121 is connected to the main body portion 211 at an obtuse angle, and the second portion 2122 is connected to the first portion 2121 at an obtuse angle. The second portion 2122 is used for welding to the solder pad 11.

[0031] In this embodiment, the main body 211 of the wire core 21 is first bent at an obtuse angle to form a first portion 2121, causing the bending direction of the wire core 21 to deviate from the extension axis of the main body 211. Then, a second obtuse angle bend is performed at the end of the first portion 2121 to form a second portion 2122, readjusting the end of the wire core 21 to a direction parallel to the main body 211. During the two obtuse angle bends, the tensile stress on the insulation layer 22 of the wire core 21 is decomposed into two smaller stress values, avoiding local stress peaks caused by a single right-angle bend.

[0032] In an embodiment of this utility model, the included angle between the first part 2121 and the main body 211 is 120 degrees to 150 degrees; The angle between the second part 2122 and the first part 2121 is 120 degrees to 150 degrees.

[0033] In this embodiment, the bending portion 212 of the wire core 21 forms a specific path through two obtuse-angle bends. The obtuse angle between the first portion 2121 and the main body 211 is, for example, between 120 and 150 degrees, so that an inclined clearance space is formed between the main body 211 and the PCB board 1, avoiding deformation of the insulation layer 22 caused by thermal extrusion. The obtuse angle between the second portion 2122 and the first portion 2121 is also, for example, between 120 and 150 degrees, so that the end of the wire core 21 remains in parallel contact with the solder pad 11 after the two bends, resulting in a more uniform stress distribution during soldering.

[0034] In an embodiment of this utility model, the extension direction of the second part 2122 is parallel to the extension direction of the main body 211.

[0035] In this embodiment, the wire core 21 forms a stepped structure after being bent at two obtuse angles. After the second bend, the second part 2122 extends parallel to the main body 211. In this state, the bent portion 212 of the wire core 21 is restricted to the range of two obtuse angles, so that the stress generated during the bending process is distributed to the two bending points, avoiding stress concentration at a single point that could cause the insulation layer 22 to crack. At the same time, the parallel extension structure keeps the end of the wire core 21 horizontally aligned with the contact surface of the solder pad 11, eliminating the need for additional adjustment of the angle of the wire core 21 during soldering, thereby eliminating the risk of tearing of the shielding layer 23 due to bending angle deviation.

[0036] In an embodiment of this utility model, the connection between the main body 211 and the first part 2121 is rounded. And / or, the connection between the first part 2121 and the second part 2122 is rounded.

[0037] In this embodiment, the connection between the main body 211 and the first part 2121 is rounded, meaning the connection between the two adopts an arc-shaped transition structure. This can be achieved using a stamping process or a die-forming process. This structure can eliminate the local stress concentration of the insulating layer 22 caused by sharp edges. The connection between the first part 2121 and the second part 2122 is also rounded, specifically, the first part 2121 and the second part 2122 adopt an arc transition. This can be formed by the rounded corner stamping groove of a bending fixture. This design makes the stress distribution of the multi-layer bending structure more uniform.

[0038] In the embodiments of this utility model, the ratio between the length of the bent portion 212 in the axial direction and the length of the main body portion 211 in the axial direction is greater than or equal to 0.05 and less than or equal to 0.1.

[0039] In this embodiment, the length ratio of the bent portion 212 to the main body 211 is controlled within a specific range, ensuring that the bent portion 212 has sufficient extension to form an effective welding interface while avoiding excessive deviation of the wire core 21 from the main body axis due to excessive length. When the ratio is below the lower limit, the bent portion 212 is too short, which reduces the solder adhesion area and affects welding reliability; when the ratio exceeds the upper limit, the bent portion 212 is too long, which exacerbates the bending stress of the wire core 21 and increases the risk that the insulation layer 22 cannot completely cover the bent portion 212. This ratio range balances mechanical strength and insulation protection requirements, ensuring that the bent wire core 21 maintains a stable shape under the obtuse angle structure.

[0040] In an embodiment of this utility model, the cable 2 includes multiple wire cores 21, which are arranged side by side, and the bending portions 212 of the multiple wire cores 21 extend in the same direction. The surface of the PCB board 1 is provided with a plurality of spaced solder pads 11, and the bent portion 212 of the wire core 21 is soldered to a solder pad 11.

[0041] In this embodiment, when the wire cores 21 are arranged side by side, the bent portions 212 of each wire core 21 are kept aligned in the axial direction, so that each bent portion 212 can extend vertically to the surface of the corresponding solder pad 11. The multiple wire cores 21 are arranged at intervals in the horizontal direction and are welded to a solder pad 11 respectively to prevent the bent wire cores 21 from contacting adjacent conductors due to positional displacement. The main body portions 211 of the multiple wire cores 21 are separated by an insulating layer 22 to prevent conductivity.

[0042] In an embodiment of this utility model, the shielding layer 23 is a non-woven structure with single-sided conductivity.

[0043] In this embodiment, single-sided conductivity means that the shielding layer 23 has conductive function on only one surface. Specifically, this can be achieved by coating a conductive coating on one side of the insulating substrate. The conductive coating can be, for example, a metal plating or a conductive polymer layer, while the other side, without the conductive coating, remains in an insulating state. This structure prevents the shielding layer 23 from contacting the wire core 21 or other conductive components after bending by physically isolating the conductive and insulating surfaces.

[0044] This utility model also proposes a wire end connector system, which includes the wire end connector assembly 10 as described above and a bending fixture, the bending fixture being used to bend the wire core 21 to form a bent portion 212.

[0045] In this embodiment, after the wire core 21 is subjected to the punching force by the bending fixture, it forms an obtuse-angled bend structure under the guidance of the rounded corner of the punching groove. After bending, the bent portion 212 of the wire core 21 contacts the solder pad 11 of the PCB board 1 and completes the soldering, while the main body 211 of the wire core 21 remains inclined or parallel to the PCB board 1 due to the obtuse-angled bend. The rounded corner design of the punching groove of the bending fixture makes the transition area between the bent portion 212 and the main body 211 form a smooth curved surface, preventing the wire core 21 from being exposed.

[0046] In an embodiment of this utility model, the bending fixture includes an upper die and a lower die, and a stamping groove is formed between the upper die and the lower die. The edge of the stamping groove is rounded. The upper die can move relative to the lower die to stamp the wire core 21 to form a bent part 212.

[0047] In this embodiment, the bending fixture is a device for plastically deforming the wire core 21. Specifically, it can be implemented using a stamping structure including an upper die and a lower die. The edge of the stamping groove formed between the upper and lower dies is designed with rounded corners. The bending of the wire core 21 is completed through the relative movement of the stamping action. The rounded corner edge of the stamping groove is an arc transition structure at the edge of the groove body. Specifically, it can be implemented using an arc chamfer with a radius ranging from 0.5 mm to 2 mm. This structure guides the wire core 21 to deform evenly under force during the stamping process, avoiding sharp edges from scratching the insulation layer 22. The movement of the upper die relative to the lower die is controlled by a hydraulic or mechanical drive device to control the closing stroke of the die. Specifically, it can be implemented using a servo motor in conjunction with a guide post guiding mechanism, thereby precisely defining the bending angle and position of the wire core 21.

[0048] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A wire-end connector assembly (10), characterized in that, The wire connector assembly (10) includes: PCB board (1), wherein the surface of the PCB board (1) is provided with solder pads (11); and The cable (2) includes a core (21), an insulation layer (22), and a shielding layer (23). The core (21) includes a main body (211) and a bent portion (212) connected to each other. The axis of the main body (211) and the axis of the bent portion (212) are set at an obtuse angle. The bent portion (212) is welded to the solder pad (11). The insulation layer (22) is sleeved outside the main body (211), and the shielding layer (23) is sleeved outside the insulation layer (22).

2. The wire-end connector assembly (10) as claimed in claim 1, characterized in that, The bent portion (212) includes a first part (2121) and a second part (2122). The first part (2121) is connected to the main body (211) at an obtuse angle, and the second part (2122) is connected to the first part (2121) at an obtuse angle. The second part (2122) is used for welding to the solder pad (11).

3. The wire-end connector assembly (10) as described in claim 2, characterized in that, The angle between the first part (2121) and the main body (211) is 120 degrees to 150 degrees; The angle between the second part (2122) and the first part (2121) is 120 degrees to 150 degrees.

4. The wire-end connector assembly (10) as claimed in claim 3, characterized in that, The extension direction of the second part (2122) is parallel to the extension direction of the main body (211).

5. The wire-end connector assembly (10) as claimed in claim 4, characterized in that, The connection between the main body (211) and the first part (2121) is rounded; And / or, the connection between the first part (2121) and the second part (2122) is rounded.

6. The wire-end connector assembly (10) as claimed in claim 5, characterized in that, The ratio between the length of the bent portion (212) in the axial direction and the length of the main body portion (211) in the axial direction is greater than or equal to 0.05 and less than or equal to 0.

1.

7. The wire-end connector assembly (10) as claimed in any one of claims 1 to 6, characterized in that, The cable (2) includes multiple wire cores (21), which are arranged side by side, and the bending portions of the multiple wire cores extend in the same direction; The surface of the PCB board (1) is provided with a plurality of spaced solder pads (11), and the bent portion (212) of one of the wire cores (21) is soldered to one of the solder pads (11).

8. The wire-end connector assembly (10) as claimed in any one of claims 1 to 6, characterized in that, The shielding layer (23) is a non-woven structure that is conductive on one side.

9. A wire-end connector system, characterized in that, The wire connector system includes a wire connector assembly (10) as claimed in any one of claims 1 to 8 and a bending fixture for bending the wire core (21) to form the bent portion (212).

10. The wire-end connector system as claimed in claim 9, characterized in that, The bending fixture includes an upper die and a lower die. A stamping groove is formed between the upper die and the lower die. The edge of the stamping groove is rounded. The upper die can move relative to the lower die to stamp the wire core (21) to form the bent part (212).

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