Flexible circuit board connection method and three-layer multi-point buckling connector thereof

Abstract

The invention discloses a flexible circuit board connection method and a three-layer multi-point buckling connector thereof, the connector comprises a male end connector, a flexible circuit board, a plastic shell and a plastic cover, the flexible circuit board is provided with a plurality of bonding pads, two sides of the plastic shell are provided with a plurality of clamping positions, two sides of the interior of the plastic cover are provided with a plurality of clamping points, and the bonding pads are connected with the clamping positions. Clamping structures are arranged at the two ends of the plastic cover, a hardware terminal is arranged in the plastic shell, a spring clamping piece and a welding pin are arranged at the two ends of the hardware terminal respectively, and a guide pin is arranged in the male end connector. By arranging a plurality of rows of clamping positions and clamping points, the connection stability is enhanced, a traditional cold pressing riveting mode is replaced with tin fusion welding, and the virtual connection quality problem of the connection position is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, in particular to a flexible circuit board connection method and a three-layer multi-point buckle connector thereof. Background Art

[0002] As an essential connection component for information and power transmission in small electronic devices, the processing technology of wire-to-board connectors directly affects the performance and stability of the product. Existing connection technologies mainly focus on the connection between the wire harness and the connector terminal. At present, most of them use cold riveting or insulation displacement piercing to connect the terminal and the circuit board. Cold riveting uses pressure to fuse the wire harness and the terminal together. Insulation displacement piercing connection fixes the wire harness to the connector base by piercing the terminal.

[0003] The above two connection processes require precision processing equipment, and the production cost is high. Precision processing equipment and process flow make the production cost high; and the connection effect can only be judged by the appearance shape and riveting size, and the internal connection quality cannot be directly observed. Once there are defects such as virtual connection and disconnection, it is difficult to identify. The fixing method mostly uses simple two-point buckles or threads, etc., which are not stable and it is difficult to effectively ensure the stability of the connector, especially in connectors with multiple rows of terminals. Insufficient connection reliability, high incidence of defects such as virtual connection and disconnection, will lead to reduced equipment performance or even malfunction, directly affecting product stability and service life, and affecting the cost performance of the product.

[0004] Therefore, it is necessary to provide a flexible circuit board connection method and a connector thereof that can improve connection reliability, reduce production costs, and effectively ensure connector stability. Summary of the invention

[0005] The present invention provides a flexible circuit board connection method and a three-layer multi-point snap-on connector thereof to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A flexible circuit board connection method includes a male connector, a flexible circuit board, a plastic shell and a plastic cover, wherein the flexible circuit board is provided with a plurality of pads, the two sides of the plastic shell are provided with a plurality of clamping positions, the two sides of the inside of the plastic cover are provided with a plurality of clamping points, the two ends of the plastic cover are provided with a clamping structure, the plastic shell is provided with a hardware terminal, the two ends of the hardware terminal are respectively a spring clip and a welding pin, and the male connector is provided with a guide pin, and the connection steps are as follows:

[0008] 1) Place the hardware terminal into the terminal accommodating cavity, insert the upper part of the plastic shell into the plastic cover, and make the clamping points and clamping positions correspond to each other;

[0009] 2) The plastic cover is fixed to the male connector through the snap-fit ​​structures at both ends, and the plastic shell is then fixed between the male connector and the plastic cover to form a three-layer buckle fixing structure;

[0010] 3) The guide pin extends from the socket and is clamped and connected by the spring clip of the hardware terminal. The soldering pad of the flexible circuit board extends from the top of the plastic cover and is connected to the soldering pin of the hardware terminal through tin melting soldering to complete the connection.

[0011] Preferably, a snap-on groove is provided at the bottom of the plastic cover, the clamping points are provided at the buckling grooves on both sides thereof, the upper part of the plastic shell extends into the buckling grooves, and the clamping positions and the clamping points are clamped in a one-to-one correspondence, a plurality of circuits are evenly arranged on the front and back sides of the flexible circuit board, the soldering pads are provided at both ends of each circuit, a through groove is provided on the top surface of the plastic cover, a side of the flexible circuit board provided with the soldering pad is inserted into the through groove, and the soldering pads are soldered and connected with the soldering pins in a one-to-one correspondence.

[0012] Preferably, the upper part of the plastic shell is a snap-on part and the lower part is a connecting part one, the upper top surface of the snap-on part is provided with a plurality of terminal accommodating cavities, the lower bottom surface of the connecting part one is provided with a plurality of insertion holes, and the insertion holes are connected with the terminal accommodating cavities one by one, and the locking positions are provided with two rows located on the two sides of the snap-on part.

[0013] Preferably, positioning blocks are provided at both ends of the snap-fitting part, and chamfers are provided at the upper and lower ends of the positioning blocks facing outward, the snap-fitting part is inserted into the snap-fitting groove, and a plurality of terminal insertion positions are provided on the inner top surface of the snap-fitting groove, and the terminal insertion positions are connected to the terminal accommodating cavity.

[0014] Preferably, the snap-fit ​​structure includes a push handle, the lower end of the push handle is connected to the plastic cover, and a V-shaped structure is formed between the push handle and the plastic cover, and one end of the push handle connected to the plastic cover extends downward to form a buckle.

[0015] Preferably, it also includes a male end connector, the upper part of the male end connector is the connecting part two and the lower part is the electrical board, the guide pin is arranged inside the connecting part two, the guide pin extends to the electrical board for fixed connection to form a male end pin, the connecting part one is inserted into the connecting part two, and the guide pin is clamped and contacted with the spring clip in a one-to-one manner.

[0016] Preferably, both ends of the second connecting part are provided with inwardly concave clamping parts, and the clamping buckle is clamped and connected with the clamping buckle. The plastic shell and the plastic cover are fixed by the clamping buckle and the clamping buckle, so that when the plastic shell and the male end connecting part 2 are assembled and separated, the plastic shell and the plastic cover will not be separated, thereby improving the stability of the connector.

[0017] Preferably, the clamping position is a square through hole, the clamping position is provided with two rows arranged up and down, the clamping point is a trapezoidal protrusion with an inclined surface on the side, and the clamping point is provided with two rows corresponding to the clamping position. The setting of the inclined surface cooperates with the elastic characteristics of the plastic to facilitate the clamping point to be inserted into the clamping position.

[0018] Preferably, the jacks and the terminal accommodating cavities are each provided with two rows, the hardware terminals are arranged in the terminal accommodating cavities in a one-to-one correspondence, wherein the welding pins are located in the terminal plug-in positions, and the spring clips are located in the jacks.

[0019] Preferably, a three-layer multi-point snap-on connector is a three-layer multi-point snap-on fixed connector used in the flexible circuit board connection method as described above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The flexible circuit board connection method of the present invention is convenient and fast, does not require the use of high-precision machinery and equipment, adopts tin melting welding to replace cold pressure riveting and insulation displacement puncture connection, effectively eliminates the problem of virtual connection at the connection position, ensures the reliability of the connection, is low in cost, and is easy to operate. At the same time, a method of fixing the connector by multi-point clamping is realized, which effectively solves the problem of unstable fixation of the traditional connector cover. The hardware terminal is placed in the terminal accommodating cavity, and the upper part of the plastic shell is inserted into the plastic cover for clamping, so that the clamping point and the clamping position are clamped one by one, and then the clamping structure at both ends of the plastic cover is clamped with the clamping part of the male connector, and the plastic shell is fixed between the male connector and the plastic cover to form a three-layer buckle fixing structure. Finally, the guide pin is extended from the jack into the spring clip of the hardware terminal for clamping and connection, and the soldering pad of the flexible circuit board is extended from the top of the plastic cover into the soldering pin of the hardware terminal through tin melting welding, thereby completing the connection.

[0022] The connector of the present invention is provided with a plurality of one-to-one corresponding positions and points on both sides of the plastic shell and the plastic cover, respectively, to realize a multi-point clamping fixing method, which effectively solves the problem of unstable fixing of the existing connector cover, especially in the connector with multiple rows of hardware terminals, the fixing is more stable, and the problem of disconnection of the hardware terminals due to external force collision can be effectively prevented. In addition, a clamping structure is provided at both ends of the plastic cover, and the plastic shell is fixed between the male connector and the plastic cover by clamping the buckle of the clamping structure with the clamping part, which further enhances the connection stability, ensures that the connection between the male connector, the plastic cover and the plastic shell is more firm, and prevents problems such as falling off or breaking. In addition, the use of tin melting welding to replace cold riveting and insulation displacement puncture connection can effectively eliminate the quality problem of virtual connection at the connection position, and can realize that this flexible circuit board connector has greater flexibility than the wiring harness or electronic wire harness while minimizing the wiring space occupied, and can realize any bending angle in the outlet direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the flexible circuit board of the present invention;

[0025] Figure 3 It is a schematic diagram of the assembly position of the overall structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the upper and lower structures of the plastic shell of the present invention;

[0027] Figure 5 It is a schematic diagram of the upper and lower structures of the plastic cover of the present invention;

[0028] Figure 6 It is a schematic diagram of the hardware terminal structure of the present invention;

[0029] Figure 7 It is a cross-sectional schematic diagram of the connection state of the present invention;

[0030] 1. Plastic shell; 2. Connection part 1; 3. Snap-on part; 4. Snap-on structure; 5. Terminal accommodating cavity; 6. Socket; 7. Clamping position; 8. Positioning block; 9. Snap-on part; 10. Plastic cover; 11. Electric board; 12. Through groove; 13. Clamping point; 14. Pressing handle; 15. Buckle; 16. Terminal plug-in position; 17. Hardware terminal; 18. Welding pin; 19. Spring clip; 20. Connection part 2; 21. Guide pin; 22. Male pin; 23. Flexible circuit board; 24. Circuit; 25. Soldering pad; 26. Snap-on groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Reference Figure 1-7 A method for connecting a flexible circuit board includes a male connector, a flexible circuit board 23, a plastic housing 1 and a plastic cover 10, wherein the flexible circuit board 23 is provided with a plurality of pads, the plastic housing 1 is provided with a plurality of clamping positions 7 on both sides, the plastic cover 10 is provided with a plurality of clamping points 13 on both sides inside, a clamping structure 4 is provided at both ends of the plastic cover 10, a hardware terminal 17 is provided in the plastic housing 1, and the two ends of the hardware terminal 17 are respectively a spring clip 19 and a welding pin 18, and a guide pin 21 is provided in the male connector, and the connection steps are as follows:

[0033] 1) Place the hardware terminal 17 into the terminal accommodating cavity 5, and insert the upper part of the plastic housing 1 into the plastic cover 10, so that the clamping point 13 and the clamping position 7 are clamped in a one-to-one correspondence;

[0034] 2) The plastic cover 10 is fixed to the male connector through the snap-fit ​​structures 4 at both ends, and the plastic housing 1 is then fixed between the male connector and the plastic cover 10 to form a three-layer buckle fixing structure;

[0035] 3) The guide pin 21 extends from the jack 6 and is clamped and connected by the spring clip 19 of the hardware terminal 17. The pad 25 of the flexible circuit board 23 extends from the top of the plastic cover 10 and is connected to the welding pin 18 of the hardware terminal 17 by tin melting welding to complete the connection.

[0036] Put the hardware terminal 17 into the terminal accommodating cavity 5, insert the snap-fitting part 3 of the plastic shell 1 into the snap-fitting groove 26 of the plastic cover 10, make the clamping point 13 and the clamping position 7 correspond one to one, insert the connecting part 1 2 into the connecting part 2 20, and the snap-fitting 15 of the clamping structure 4 at both ends is clamped and connected with the clamping part 9 on the male connector, and the plastic shell 1 is fixed between the male connector and the plastic cover 10. At the same time, the guide pin 21 extends from the socket 6 and is clamped and connected by the spring clip 19 of the hardware terminal 17, and the pad 25 of the flexible circuit board 23 extends from the through groove 12 into the plastic cover 10 and is connected to the welding pin 18 of the hardware terminal 17 by tin melting welding.

[0037] The bottom of the plastic cover 10 is provided with a buckle groove 26, the clamping point 13 is provided in the buckle groove 26 on both sides, the upper part of the plastic shell 1 extends into the buckle groove 26, and the clamping position 7 is clamped with the clamping point 13 in a one-to-one correspondence, a plurality of circuits 24 are evenly arranged on both sides of the flexible circuit board 23, the pads 25 are provided at both ends of each circuit 24, the top surface of the plastic cover 10 is provided with a through groove 12, the side of the flexible circuit board 23 provided with the pad 25 is inserted into the through groove 12, and the pads 25 are welded and connected with the welding pins 18 in a one-to-one correspondence. The welding method of the pad 25 and the welding pin 18 is tin melting welding.

[0038] The upper part of the plastic shell 1 is a buckle part 3 and the lower part is a connecting part 2. The upper top surface of the buckle part 3 is provided with a plurality of terminal accommodating cavities 5, and the lower bottom surface of the connecting part 2 is provided with a plurality of insertion holes 6, and the insertion holes 6 are connected with the terminal accommodating cavities 5 in a one-to-one correspondence. The locking positions 7 are provided in two rows on the two side surfaces of the buckle part 3.

[0039] Positioning blocks 8 are provided at both ends of the snap-fitting part 3, and chamfers are provided at the upper and lower ends of the positioning blocks 8 facing outward. The snap-fitting part 3 is inserted into the snap-fitting groove 26, and a plurality of terminal insertion positions 16 are provided on the inner top surface of the snap-fitting groove 26, and the terminal insertion positions 16 are connected to the terminal accommodating cavity 5.

[0040] The snap-fit ​​structure 4 includes a push handle 14 , the lower end of which is connected to the plastic cover 10 , and a V-shaped structure is formed between the push handle 14 and the plastic cover 10 , and one end of the push handle 14 connected to the plastic cover 10 extends downward to form a buckle 15 .

[0041] It also includes a male connector, the upper part of which is a connecting part 20 and the lower part is an electrical board 11, the guide pin 21 is arranged inside the connecting part 20, the guide pin 21 extends to the electrical board 11 and is fixedly connected to form a male pin 22, the connecting part 1 2 is inserted into the connecting part 20, and the guide pin 21 is clamped and contacted with the spring clip 19 in a one-to-one manner.

[0042] Both ends of the second connection part 20 are provided with a concave clamping part 9, and the clamping buckle 15 is clamped and connected with the clamping part 9. The plastic housing 1 and the plastic cover 10 are fixed by the clamping buckle 15 and the clamping part 9, so that when the plastic housing 1 and the male end connection part 20 are assembled and separated, the plastic housing 1 and the plastic cover 10 will not be separated, thereby improving the stability of the connector.

[0043] The clamping position 7 is a square through hole, and the clamping position 7 is provided with two rows arranged up and down, and the clamping point 13 is a trapezoidal protrusion with an inclined surface on the side, and the clamping point 13 is provided with two rows corresponding to the clamping position 7. The setting of the inclined surface cooperates with the elastic characteristics of the plastic to facilitate the clamping point 13 to be clamped into the clamping position 7.

[0044] The jacks 6 and the terminal accommodating chambers 5 are each provided with two rows, and the hardware terminals 17 are arranged in the terminal accommodating chambers 5 in a one-to-one correspondence, wherein the welding pins 18 are located in the terminal plug-in positions 16 , and the spring clips 19 are located in the jacks 6 .

[0045] A three-layer multi-point buckle connector, a three-layer multi-point buckle fixed connector used in the flexible circuit board connection method as mentioned above.

[0046] The present invention enhances the connection stability by arranging multiple rows of clamping positions 7 and clamping points 13, and adopts tin melting welding to replace the traditional cold pressure riveting method, thereby effectively eliminating the quality problem of virtual connection at the connection position.

[0047] After testing, it was found that the method and the connector formed by the method can save 30% of the connection time after installation compared with the traditional connector, and the tensile strength test is also higher.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flexible circuit board connection method, characterized in that: The invention comprises a male connector, a flexible circuit board (23), a plastic housing (1) and a plastic cover (10), wherein the flexible circuit board (23) is provided with a plurality of solder pads, the plastic housing (1) is provided with a plurality of clamping positions (7) on both sides, the plastic cover (10) is provided with a plurality of clamping points (13) on both sides, the plastic cover (10) is provided with a clamping structure (4) at both ends, the plastic housing (1) is provided with a hardware terminal (17), the two ends of the hardware terminal (17) are respectively a spring clip (19) and a welding pin (18), and the male connector is provided with a guide pin (21), and the connection steps are as follows: 1) Place the hardware terminal (17) into the terminal accommodating cavity (5), and insert the upper part of the plastic housing (1) into the plastic cover (10) so that the clamping point (13) and the clamping position (7) are clamped in a one-to-one correspondence; 2) The plastic cover (10) is fixed to the male connector via the snap-fit ​​structures (4) at both ends, thereby fixing the plastic housing (1) between the male connector and the plastic cover (10), thereby forming a three-layer snap-fit ​​fixing structure; 3) The guide pin (21) extends from the jack (6) to be clamped and connected by the spring clip (19) of the hardware terminal (17), and the soldering pad (25) of the flexible circuit board (23) extends from the top of the plastic cover (10) to be connected to the soldering pin (18) of the hardware terminal (17) by tin melting soldering, thereby completing the connection.

2. The flexible circuit board connector according to claim 1, characterized in that: The bottom of the plastic cover (10) is provided with a buckle groove (26), the clamping point (13) is provided at the buckle groove (26) on both sides thereof, the upper part of the plastic shell (1) extends into the buckle groove (26), and the clamping position (7) is clamped with the clamping point (13) in a one-to-one correspondence, a plurality of circuits (24) are evenly arranged on both sides of the flexible circuit board (23), the soldering pad (25) is provided at both ends of each circuit (24), the top surface of the plastic cover (10) is provided with a through groove (12), one side of the flexible circuit board (23) provided with the soldering pad (25) is inserted into the through groove (12), and the soldering pad (25) is soldered and connected with the soldering pin (18) in a one-to-one correspondence.

3. The flexible circuit board connector according to claim 2, characterized in that: The upper part of the plastic shell (1) is a buckle-joined part (3) and the lower part is a connecting part (2); the upper top surface of the buckle-joined part (3) is provided with a plurality of terminal accommodating cavities (5); the lower bottom surface of the connecting part (2) is provided with a plurality of insertion holes (6); and the insertion holes (6) are connected to the terminal accommodating cavities (5) in a one-to-one correspondence; and the latching positions (7) are provided in two rows and are located on two side surfaces of the buckle-joined part (3).

4. The flexible circuit board connector according to claim 3, characterized in that: Positioning blocks (8) are provided at both ends of the buckle connection portion (3), and chamfers are provided at both upper and lower ends of the positioning block (8) facing outward. The buckle connection portion (3) is inserted into a buckle connection groove (26), and a plurality of terminal insertion positions (16) are provided on the inner top surface of the buckle connection groove (26), and the terminal insertion positions (16) are connected to the terminal accommodating cavity (5).

5. The flexible circuit board connector according to claim 4, characterized in that: The snap-fit ​​structure (4) comprises a push handle (14), the lower end of which is connected to the plastic cover (10), and a V-shaped structure is formed between the push handle (14) and the plastic cover (10), and one end of the push handle (14) connected to the plastic cover (10) extends downward to form a buckle (15).

6. The flexible circuit board connector according to claim 5, characterized in that: The upper part of the male connector is the second connection part (20) and the lower part is the electric board (11), the guide pin (21) is arranged inside the second connection part (20), the guide pin (21) extends to the electric board (11) and is fixedly connected to form a male pin (22), the first connection part (2) is inserted into the second connection part (20), and the guide pin (21) is clamped and contacted with the spring clip (19) in a one-to-one correspondence.

7. The flexible circuit board connector according to claim 6, characterized in that: Both ends of the second connecting part (20) are provided with inwardly concave clamping parts (9), and the buckle (15) is clamped and connected with the clamping parts (9).

8. The flexible circuit board connector according to claim 7, characterized in that: The clamping position (7) is a square through hole, and the clamping position (7) is provided with two rows arranged up and down, and the clamping point (13) is a trapezoidal protrusion with an inclined surface on the side, and the clamping point (13) is provided with two rows and is clamped with the clamping position (7) in a one-to-one correspondence.

9. The flexible circuit board connector according to claim 8, characterized in that: The jack (6) and the terminal accommodating cavity (5) are both provided with two rows, and the hardware terminals (17) are arranged in a one-to-one correspondence in the terminal accommodating cavity (5), wherein the welding pin (18) is located in the terminal plug-in position (16), and the spring clip (19) is located in the jack (6).

10. A three-layer multi-point snap-on connector, characterized in that: A three-layer multi-point buckle fixed connector used in the flexible circuit board connection method as claimed in any one of claims 1.

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