CN217768828U

CN217768828U - PCB (printed circuit board) flat cable connecting structure

Info

Publication number: CN217768828U
Application number: CN202221360007.0U
Authority: CN
Inventors: 刘松辉; 游慧
Original assignee: Shenzhen Net Is Internet Co ltd
Current assignee: Shenzhen Net Is Internet Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-11-08
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a PCB (printed circuit board) flat cable connecting structure, which comprises a first PCB and a second PCB, wherein perforated welding discs for wiring are arranged on the first PCB and the second PCB, and the flat cable is characterized in that two ends of the flat cable are respectively and directly connected with the first PCB and the second PCB; the end part of the flat cable is provided with an open line segment which is used for separating each line so as to keep the interval of each line and correspond to each perforated welding disc; wire core sections formed by peeling wires and exposing inner cores are arranged at the end parts of the wires in the open wire sections, and conductive coatings are arranged on the surfaces of the wire core sections; the wire core sections are welded on the perforated bonding pads one by one. The utility model discloses a cancel the conventional plug connector joint of winding displacement, make the foraminiferous pad direct welding of winding displacement and PCB board after the structural design of winding displacement tip division line, skin, cladding material, overcome prior art's problem, can not cause the phenomenon of connection function badness because of factors such as not hard up, oxidation, improved the reliable and stable nature that the winding displacement is connected.

Description

PCB (printed circuit board) flat cable connecting structure

Technical Field

The present invention relates to a circuit connection structure, and more particularly, to a PCB panel cable connection structure.

Background

At present, in order to improve the design utilization rate, efficiency and the like, a plurality of electronic products adopt modular independent design and assembly such as a power panel, a lamp panel and an interface board, and then are connected to a PCB mainboard through a connector by using a flat cable. The traditional flat cable connecting line structure with the connector is easy to cause bad influence due to tolerance of the sizes of a male connector and a female connector, loose contact is caused due to larger tolerance, and difficult insertion is caused due to smaller tolerance. Meanwhile, as the male head and the female head are not welded, the surface of the pin of the connector can be slowly oxidized, the contact impedance can be changed after a long time, the performance of a product can be influenced, and the result that the connector cannot be used due to poor function can be directly caused seriously.

SUMMERY OF THE UTILITY MODEL

Problem to above-mentioned prior art exists, the utility model provides an optimize materials and connect reliable and stable PCB board winding displacement connection structure, the reliable connection between the mainly used circuit PCB primary and secondary board module.

In order to realize the purpose, the utility model adopts the technical scheme as follows:

a PCB flat cable connection structure comprises a first PCB and a second PCB which bear circuits, wherein the first PCB and the second PCB are both provided with perforated bonding pads for wiring, and the flat cable is directly connected with the first PCB and the second PCB at two ends respectively; the end part of the flat cable is provided with a line opening section which is used for separating each line so as to keep the interval of each line and correspond to each perforated welding disc; wire core sections formed by peeling wires and exposing inner cores are arranged at the end parts of the wires in the open wire sections, and conductive coatings are arranged on the surfaces of the wire core sections; the wire core sections are welded on the corresponding perforated bonding pads one by one.

Specifically, the aperture of the perforated pad matches the diameter of the inner core and the conductive plating of the wire core segment.

Specifically, the aperture D3 of the perforated pad is 0.3mm +/-0.1 mm larger than the diameter D2 of the inner core and the conductive plating layer of the wire core section.

Specifically, the length L of the core segment is 1mm +/-0.2 mm greater than the thickness of the first PCB plate; the length L of the wire core section is 1mm +/-0.2 mm larger than the thickness of the second PCB plate.

Specifically, the length L2 of the open line segment is 10% ± 2% of the flat cable length L1.

Specifically, the conductive coating is made of an inert metal material.

Specifically, the thickness of the conductive plating layer is 0.15mm +/-0.05 mm.

Specifically, the inert metal material adopted by the conductive coating is one of tin, nickel, silver and gold materials.

Specifically, the wire core section is inserted into a hole of the perforated pad and fixed by wave soldering.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The utility model discloses be connected the various bad problems that exist through winding displacement and plug connector between the sub-mother board of current PCB board and carry out the improved design, connect through the cancellation plug connector, connect the winding displacement tip, open the line, skin, make the foraminiferous pad direct weld of winding displacement and PCB board behind the structural design of cladding material, prior art's problem has effectively been overcome, can not be because of not hard up, factors such as oxidation cause the bad phenomenon of connection function, the reliable and stable nature that the winding displacement is connected has been improved, and the material cost who connects has been reduced, the manufacturing process step has been simplified, the production manufacturing time has been practiced thrift, and through aassessment and actual measurement, also can save welded labour cost in PCB board and winding displacement assembling process, and the production efficiency is improved. The utility model relates to an ingenious, simple structure, it is convenient to realize, is suitable for to be connected at PCB board and winding displacement and uses in making.

(2) The utility model sets the open line segment to be about one tenth of the length of the flat cable, which is beneficial to inserting each wire into the pad with holes respectively without influencing the welding operation and avoiding the influence of overlong open line length on the neatness of the wiring; the utility model discloses set up the sinle silk section length to about the 1mm more of PCB plate thickness to set up the aperture with foraminiferous pad to slightly be greater than the line footpath, it is downthehole that the pad is planted with each line to the convenience, and good tinning when doing benefit to the welding.

(3) The utility model discloses set up conductive coating on the wire core section, skinning the winding displacement and revealing the copper core and protect, reduce the oxidation of bare copper line, improved winding displacement and coupling part's antioxidant capacity, also increased winding displacement coupling part's heat dissipation and weldable performance to improve electric conductive property between winding displacement and the PCB board pad, can also select the conductive coating of different inert metal material (like tin, nickel, silver, gold) to increase the over-current ability according to the requirement to the electric current.

(4) The utility model discloses a wave-soldering welding mode is fixed with winding displacement tip and PCB board welding equipment, has simplified the manufacturing step, has practiced thrift the welding labour cost, has improved production efficiency.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a flat cable portion according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a single wire of the flat cable according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a conventional flat cable and plug connector joint.

Detailed Description

The present invention will be further described with reference to the following drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples.

Examples

As shown in fig. 1 to 3, the PCB flat cable connection structure includes a first PCB 1 and a second PCB 2 carrying a circuit, and a flat cable 10 having two ends directly connected to the first PCB and the second PCB respectively, wherein the first PCB and the second PCB are both provided with a perforated pad 3 for wiring; the end part of the flat cable is provided with a line-opening section 11 which is used for separating each line to keep the interval of each line and corresponds to each perforated welding disc; a wire core section 12 formed by peeling a wire to expose an inner core is arranged at the end part of each wire in the open wire section, and a conductive plating layer 13 is arranged on the surface of the wire core section; the wire core sections are inserted into the holes of the perforated bonding pads one by one and fixed on the corresponding perforated bonding pads through wave soldering. Through the optimal design of the PCB flat cable connecting structure, various adverse performance influences caused by tolerance of sizes of male and female head holes and no welding impedance increase along with time and the like of the modularized power supply board, the lamp board, the interface board and the like and the connection between main boards by using the flat cable plug connector at present are solved. And the utility model discloses adopt wave-soldering machine ization welding process in manufacturing process, when connection structure has high reliability, still improved production efficiency, practiced thrift the manual work and saved the material expense to be worth wideling popularize.

Description of specific structural design: the technical scheme cancels the conventional connector joint at the end part of the flat cable, and correspondingly, the corresponding joint does not need to be arranged at the welding pad part of the PCB; then, the end of the flat cable is subjected to corresponding structural improvement design, open line sections are arranged at two ends, the length L2 of each open line section is about one tenth of the length L1 of the flat cable, generally 10 +/-2%, and the flat cable is favorably inserted into a pad hole on a PCB respectively, the long open line sections can lead to messy lines and affect the neatness of wiring, and the short open line sections can affect the subsequent welding connection operation. The configured wire core section is used for directly peeling each opened wire to expose the internal copper core so as to be connected with the bonding pad, because a bare copper wire is easy to oxidize, the oxidation is reduced, the oxidation resistance is improved, the heat dissipation and weldability are improved, the welding is more facilitated, the electric conductivity is improved, other conductive inert metals (such as nickel plating, silver plating, gold plating and the like) can be plated according to the requirements on current to improve the overcurrent capacity, and the thickness of the conductive plating layer is about 0.15 mm; the length L of the wire core section is about 1mm plus the thickness of the PCB, the thicknesses of the two PCBs can be different, the wire diameter of the bare copper core is D1, and the diameter D2 of the wire core section added with the conductive coating is about 0.3mm plus D1; aperture D3 and this diameter D2 of foraminiferous pad on the PCB board match, generally set up to about D3 is greater than D2 by 0.3mm, not only be favorable to inserting the winding displacement hole on the PCB board like this, convenient welding, still be favorable to good tinning, then cross wave-soldering with winding displacement and PCB board together and produce the equipment.

Fig. 4 shows a conventional PCB and flat cable connector connection structure. The utility model discloses the winding displacement structure after optimizing has simplified the manufacturing step owing to cancelled the joint, has practiced thrift the manufacturing time, has saved material cost. The novel assembly of the flat cable and the PCB not only saves the labor cost for welding, but also improves the production efficiency, and also saves the material cost of male and female connectors at the board end between each module board and the mainboard. Meanwhile, because the wires are directly welded on the PCB, the phenomenon of poor functions caused by looseness, oxidation and the like can be avoided, and various problems caused by the traditional flat cable design mode are fundamentally solved.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not the limitation of the protection scope of the present invention, but all adopt the design principle of the present invention, and the changes made by performing non-creative work on this basis, all should belong to the protection scope of the present invention.

Claims

1. A PCB flat cable connection structure comprises a first PCB and a second PCB which bear circuits, wherein the first PCB and the second PCB are both provided with perforated pads for wiring, and the PCB flat cable connection structure is characterized by also comprising flat cables of which two ends are respectively and directly connected with the first PCB and the second PCB; the end part of the flat cable is provided with a line opening section which is used for separating each line so as to keep the interval of each line and correspond to each perforated welding disc; wire core sections formed by peeling wires and exposing inner cores are arranged at the end parts of the wires in the open wire sections, and conductive coatings are arranged on the surfaces of the wire core sections; the wire core sections are welded on the corresponding perforated bonding pads one by one.

2. The PCB board ribbon connection structure of claim 1, wherein the aperture of the perforated pad matches the diameter of the inner core and the conductive plating of the core segment.

3. The PCB flat cable connection structure according to claim 2, wherein the aperture D3 of the perforated pad is 0.3mm ± 0.1mm larger than the diameter D2 of the core and the conductive plating layer of the core segment.

4. The PCB flat cable connection structure of claim 1, wherein the length L of the core segment is 1mm ± 0.2mm greater than the thickness of the first PCB plate; the length L of the wire core section is 1mm +/-0.2 mm larger than the thickness of the second PCB plate.

5. The PCB flat cable connecting structure of claim 1, wherein the length L2 of the open line segment is 10% ± 2% of the flat cable length L1.

6. The PCB board flat cable connection structure of any one of claims 1 to 5, wherein the conductive plating layer is made of an inert metal material.

7. The PCB flat cable connection structure of claim 6, wherein the thickness of the conductive plating layer is 0.15mm ± 0.05mm.

8. The flat cable connection structure of PCB board of claim 6, wherein the inert metal material adopted by the conductive plating layer is one of tin, nickel, silver and gold material.

9. The PCB flat cable connection structure of any one of claims 1 to 5, wherein the core segment is inserted into the hole of the perforated pad and fixed by wave soldering.