Anti-overflow tin electrical connector

Abstract

The utility model provides a kind of anti-overflowing tin electric connector, it includes insulating body, the electrically conductive terminal of being fixed in the insulating body and the flexible circuit board electrically connected with electrically conductive terminal, the electrically conductive terminal includes a group of signal terminal and the two groups of power terminal being arranged in the signal terminal two sides, each the electrically conductive terminal includes a pair of contact unit being arranged side by side in transverse direction, each the contact unit includes contact section, holding section and the welding section being connected with the flexible circuit board, the holding section is flat, the contact section is straightly extended from the holding section, the holding section of the pair of contact unit is connected by welding to the side of each other. The utility model anti-overflowing tin electric connector can effectively avoid soldering tin to flow to the butt joint area.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, and in particular to an anti-overflow solder electrical connector. Background Technology

[0002] Traditional electrical connectors typically include an insulating body and several conductive terminals fixed within the insulating body. The conductive terminals are soldered to a flexible circuit board to achieve electrical connection. As the market demand for the current withstand capability of electrical connectors increases, along with the requirements for small pitch and ultra-thin design, the conductive terminals are configured as two contact units arranged in parallel to improve current transmission capability. Due to the requirement for small pitch, the gap between the contact units is also small. However, the small gap between the contact units can cause the solder to flow forward to the contact area due to the siphon effect.

[0003] In view of this, it is necessary to improve the existing electrical connectors to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an anti-overflow solder connector, which can effectively prevent molten solder paste from flowing forward to the contact section of the conductive terminals and causing solder balls.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides an anti-overflow solder connector, which includes an insulating body, a plurality of conductive terminals fixed within the insulating body, and a flexible circuit board electrically connected to the conductive terminals. The conductive terminals include a set of signal terminals and two sets of power terminals disposed on both sides of the signal terminals. Each conductive terminal includes a pair of contact units arranged side by side in the lateral direction. Each contact unit includes a contact section connected front to back, a retaining section, and a soldering section connected to the flexible circuit board. The retaining section is flat, and the contact section extends straight forward from the retaining section. The retaining sections of the pair of contact units are soldered together on the sides facing each other.

[0006] As a further improvement of this utility model, the contact segment is flat, and the side of each conductive terminal that faces away from each other is the contact surface.

[0007] As a further improvement of this utility model, each of the conductive terminals has a bridging portion that connects the bottom ends of the pair of contact units, the outer surface of the bridging portion is arc-shaped, and there is a gap between the contact segments of each of the conductive terminals.

[0008] As a further improvement of this utility model, one of the contact units extends rearward beyond the other contact unit, and has a material belt connecting portion located behind the other contact unit and used to connect with the material belt at its rear end.

[0009] As a further improvement of this utility model, the welding section of each contact unit includes an extension portion extending straight backward from its retaining section and a welding portion formed by bending from the top end of the extension portion, and the welding portions of the pair of contact units extend toward each other.

[0010] As a further improvement of this utility model, each pair of welding portions of the conductive terminal has an arc-shaped shoulder formed on one side adjacent to each other, and the welding portions are connected to the extension portion through the shoulder.

[0011] As a further improvement of this utility model, the retaining section of each contact unit has an interference portion disposed on one side in its height direction, and the conductive terminal is assembled into the insulating body from back to front. The interference portion and the insulating body interfere with each other to fix the conductive terminal to the insulating body.

[0012] As a further improvement of this utility model, the insulating body has a docking portion located on the front side and a wiring portion located on the rear side. The docking portion has a top wall and a pair of side walls disposed on both sides of the top wall. The contact section is exposed on the lower side of the top wall, and the welding portion is exposed on the upper side of the wiring portion.

[0013] As a further improvement of this utility model, the wiring part is provided with a plurality of bosses arranged in the transverse direction. Each boss includes a base and a protrusion extending upward from the base. A first receiving groove for receiving the extension is formed between adjacent bases. The transverse width of the protrusion is smaller than the transverse width of the base, so that a second receiving groove for receiving the welding part is formed on both sides of the protrusion. The upper surface of the protrusion is flush with the welding surface of the welding part.

[0014] As a further improvement of this utility model, the material thickness of the power terminal is greater than that of the signal terminal, the shoulder of the power terminal has a notch formed by recessing forward from its rear end, and the strip connecting part is located directly behind the notch in the lateral direction.

[0015] The beneficial effects of this utility model are as follows: The anti-overflow solder connector of this utility model enhances the current resistance by setting the conductive terminals as a pair of contact units arranged side by side. The flat retaining sections facing each other are welded together to form a continuous and complete solder barrier. This prevents the molten solder in the rear from flowing forward due to the siphon effect and causing solder balls. This ensures that the contact sections of the conductive terminals are always clean and not contaminated by solder, thereby ensuring stable contact impedance and excellent electrical performance. Attached Figure Description

[0016] Figure 1This is a three-dimensional assembly diagram of the anti-overflow solder connector of this utility model; Figure 2 yes Figure 1 Another view of the anti-overflow solder connector shown; Figure 3 yes Figure 1 The diagram shown is an exploded 3D view of the anti-spill solder connector after the flexible circuit board has been removed. Figure 4 yes Figure 3 Another view of the anti-overflow solder connector shown; Figure 5 yes Figure 1 The diagram shown is a 3D assembly of the anti-overflow solder connector after the flexible circuit board has been removed. Figure 6 yes Figure 3 A top view of the power terminals of the anti-overflow solder connector shown; Figure 7 yes Figure 3 Rear view of the power terminal of the anti-overflow solder connector shown. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0018] like Figures 1 to 7 As shown, this utility model provides an anti-spill solder connector 100, which includes an insulating body 1, a plurality of conductive terminals 2 fixed in the insulating body 1, and a flexible circuit board 3 electrically connected to the conductive terminals 2.

[0019] Please refer to Figures 1 to 5 As shown, the insulating body 1 has a docking portion 12 located on the front side and a wiring portion 13 located on the rear side. The docking portion 12 has a top wall 121 and a pair of side walls 123 disposed on both sides of the top wall 121. The top wall 121 and the side walls 123 are connected to make the docking portion 12 n-shaped. In this embodiment, the top wall 121 is longitudinally elongated in the transverse direction and has a snap-fit ​​protrusion 1212 located on its upper side and a pair of slots 1213 disposed on both sides of the snap-fit ​​protrusion 1212.

[0020] In some embodiments, the wiring portion 13 is provided with a plurality of bosses 131 arranged in a transverse direction, each boss 131 including a base 1311 and a protrusion 1312 extending upward from the base 1311.

[0021] Please refer to section 3. Figure 7As shown, the conductive terminal 2 includes a set of signal terminals 2a and two sets of power terminals 2b disposed on both sides of the signal terminals 2a. Each conductive terminal 2 includes a pair of contact units 21 arranged side by side in the lateral direction. Each contact unit 21 includes a contact section 211 connected front to back, a retaining section 212, and a welding section 213 connected to the flexible circuit board 3. The retaining section 212 is flat, and the contact section 211 extends straight forward from the retaining section 212. The retaining sections 212 of the pair of contact units 21 are welded together on the sides facing each other.

[0022] Thus, by setting the conductive terminals 2 as a pair of contact units 21 arranged side by side to enhance the current resistance, and by welding the flat retaining sections 212 facing each other, a continuous and complete solder barrier can be formed. This prevents the molten solder in the rear from flowing forward due to the siphon effect and causing solder balls, thereby ensuring that the contact sections 211 of the conductive terminals 2 are always clean and not contaminated by solder, thus ensuring stable contact impedance and excellent electrical performance.

[0023] The contact segment 211 is flat, and the side of each conductive terminal 2 that faces away from each other is the contact surface, so as to contact the mating terminal.

[0024] Each of the conductive terminals 2 has a bridging portion 23 that connects the bottom ends of the pair of contact units 21. The outer surface of the bridging portion 23 is arc-shaped, and there is a gap between the contact segments 211 of each of the conductive terminals 2. In this way, the conductive terminals 2 are folded to form a pair of contact units 21 through the arc-shaped bridging portion 23 at the bottom, thereby improving the current withstand capability.

[0025] One of the contact units 21 extends rearward beyond the other contact unit 21 and has a material belt connection portion 214 located behind the other contact unit 21 for connecting with the material belt at its rear end.

[0026] The contact section 211 is exposed on the lower side of the top wall 121, and the welded portion 2132 is exposed on the upper side of the wiring portion 13.

[0027] Each of the contact units 21 has a welding section 213 including an extension 2131 extending straight rearward from its retaining section 212 and a welding section 2132 bent from the top of the extension 2131, wherein the welding sections 2132 of the pair of contact units 21 extend toward each other.

[0028] Each pair of solder portions 2132 of the conductive terminal 2 has an arc-shaped shoulder 2134 on one side adjacent to each other, and the solder portion 2132 is connected to the extension portion 2131 through the shoulder 2134.

[0029] Thus, the conductive terminal 2 achieves a rounded corner transition design through the arc-shaped shoulder 2134, which allows stress to be evenly distributed along the smooth arc, thereby improving the mechanical strength and fatigue life of the conductive terminal 2 and ensuring the durability of the anti-spill solder connector 100.

[0030] Each of the contact units 21 has a retaining section 212 having an interference portion 2121 disposed on one side in its height direction. The conductive terminal 2 is assembled in the insulating body 1 from back to front. The interference portion 2121 and the insulating body 1 interfere with each other to fix the conductive terminal 2 to the insulating body 1.

[0031] A first receiving groove 1313 for receiving the extension 2131 is formed between adjacent bases 1311. The lateral width of the protrusion 1312 is smaller than the lateral width of the base 1311, so that a second receiving groove 1314 for receiving the welded part 2132 is formed on both sides of the protrusion 1312. The upper surface of the protrusion 1312 is flush with the welding surface of the welded part 2132.

[0032] Thus, by forming second receiving grooves 1314 on both sides of the boss 1312 to receive the welding part 2132, the welding part 2132 is effectively positioned, and its overall flatness and lateral position accuracy are ensured. By setting the upper surface of the boss 1312 and the welding surface of the welding part 2132 flush, a clear welding plane is provided, which facilitates the welding operation and inspection of the welding part 2132 and the flexible circuit board 3.

[0033] In this embodiment, the material thickness of the power terminal 2b is greater than that of the signal terminal 2a. The shoulder 2134 of the power terminal 2b has a notch 2135 formed by recessing from its rear end face forward. The strip connecting portion 214 is located directly behind the notch 2135 in the lateral direction.

[0034] Thus, by making the material thickness of the power terminal 2b greater than that of the signal terminal 2a, the power terminal 2b can carry a larger current, reducing resistance and heat generation. By providing a notch 2135 on the shoulder 2134 of the power terminal 2b, the material at that location is reduced, forming a structural "weak point". When cutting the terminal strip, the fracture path can be guided, making the punching process require less force and producing fewer burrs. Furthermore, because the fracture path is precisely controlled, the punching force is prevented from causing any deformation or damage to the precision contact section 211 and retaining section 212 at the front. The final result is a clean, flat, and dimensionally accurate power terminal rear end face.

[0035] In this invention, the anti-overflow solder connector 100 further comprises a metal housing 4 assembled outside the insulating body 1. The metal housing 4 has a main body portion 41 extending laterally. The main body portion 41 covers the upper side of the mating portion 12 and is provided with a snap-fit ​​groove 412 extending through it in the height direction and an insertion portion 413 extending rearward. The snap-fit ​​protrusion 1212 snaps into the snap-fit ​​groove 412, and the insertion portion 413 is inserted into the slot 1213 to fix the metal housing 4 to the outside of the insulating body 1.

[0036] In summary, the anti-overflow solder connector 100 of this utility model enhances the current resistance by setting the conductive terminals 2 as a pair of contact units 21 arranged side by side, and welding the flat retaining sections 212 facing each other together to form a continuous and complete solder barrier. This prevents the molten solder behind from flowing forward due to the siphon effect and causing solder balls, thereby ensuring that the contact sections 211 of the conductive terminals 2 always remain clean and are not contaminated by solder, thus ensuring stable contact impedance and excellent electrical performance.

[0037] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0038] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A solder-proof connector, comprising an insulating body, a plurality of conductive terminals fixed within the insulating body, and a flexible circuit board electrically connected to the conductive terminals, wherein the conductive terminals include a set of signal terminals and two sets of power terminals disposed on both sides of the signal terminals, characterized in that: Each of the conductive terminals includes a pair of contact units arranged side by side in the lateral direction. Each contact unit includes a contact section connected front to back, a retaining section, and a soldering section connected to the flexible circuit board. The retaining section is flat, and the contact section extends straight forward from the retaining section. The retaining sections of the pair of contact units are soldered together on the side facing each other.

2. The anti-overflow solder connector as described in claim 1, characterized in that: The contact segment is flat, and the side of each conductive terminal that faces away from each other is the contact surface.

3. The anti-overflow solder connector as described in claim 2, characterized in that: Each of the conductive terminals has a bridging portion that connects the bottom ends of the pair of contact units, the outer surface of the bridging portion being arc-shaped, and a gap being present between the contact segments of each of the conductive terminals.

4. The anti-overflow solder connector as described in claim 3, characterized in that: One of the contact units extends rearward beyond the other contact unit and has a strip connection portion located behind the other contact unit for connecting to the strip.

5. The anti-overflow solder connector as described in claim 4, characterized in that: Each of the contact units has a welded section comprising an extension extending straight rearward from its retaining section and a welded section bent at the top of the extension, wherein the welded sections of the pair of contact units extend toward each other.

6. The anti-overflow solder connector as described in claim 5, characterized in that: Each of the conductive terminals has a pair of solder portions forming an arc-shaped shoulder on one side adjacent to each other, and the solder portions are connected to the extension portion through the shoulder.

7. The anti-overflow solder connector as described in claim 3, characterized in that: Each of the contact units has a retaining section with an interference portion disposed on one side in its height direction. The conductive terminal is assembled into the insulating body from back to front. The interference portion and the insulating body interfere with each other to fix the conductive terminal to the insulating body.

8. The anti-overflow solder connector as described in claim 5, characterized in that: The insulating body has a mating portion on the front side and a wiring portion on the rear side. The mating portion has a top wall and a pair of side walls disposed on both sides of the top wall. The contact section is exposed on the lower side of the top wall, and the welding portion is exposed on the upper side of the wiring portion.

9. The anti-overflow solder connector as described in claim 8, characterized in that: The wiring portion is provided with a plurality of protrusions arranged in a transverse direction. Each protrusion includes a base and a protrusion extending upward from the base. A first receiving groove for receiving the extension is formed between adjacent bases. The transverse width of the protrusion is smaller than the transverse width of the base, so that a second receiving groove for receiving the welding portion is formed on both sides of the protrusion. The upper surface of the protrusion is flush with the welding surface of the welding portion.

10. The anti-overflow solder connector as described in claim 6, characterized in that: The material thickness of the power terminal is greater than that of the signal terminal, and the shoulder of the power terminal has a notch formed by recessing forward from its rear end. The strip connection portion is located directly behind the notch in the lateral direction.

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