FPC pressure welding jig

Abstract

The utility model discloses an FPC pressure welding jig. The FPC pressure welding jig comprises a carrier plate and a pressure welding head, a plurality of positioning holes are formed in the carrier plate, the positioning holes are evenly distributed in the carrier plate, and limiting grooves are formed in the two sides of the carrier plate; the pressure welding head is installed above the carrier plate and comprises a welding head body and a tin pressing block, the welding head body is provided with a heat conduction groove, and a plurality of arc-shaped grooves are formed in the bottom of the tin pressing block. The carrier plate is provided with positioning holes, so that the FPC circuit board can be conveniently positioned, and golden fingers of the FFC flat cable can be aligned with bonding pads of the FPC circuit board; the arc-shaped groove is matched with the welding position of the FPC circuit board, the heat conduction groove enables current to flow through the welding head body, so that the bottom of the tin pressing block is heated, the tin wire is melted in the arc-shaped groove, and therefore the FFC flat cable and the golden finger of the FPC circuit board are completely melted and connected together, poor conditions such as insufficient welding and continuous welding can be avoided, and the FPC pressure welding quality and the machining efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible circuit board processing, in particular to an FPC pressure welding jig. Background Art

[0002] In many electrical products, it is necessary to press-weld the FFC cable (Flexible Flat Cable) and the FPC circuit board (Flexible Printed Circuit) together. First, position the cable head of the FFC cable on the pad of the FPC circuit board and align and stick it, then manually use an electric soldering iron to melt the solder wire for fusion welding. This requires high skills from personnel, and is prone to cold welding and continuous welding, resulting in unstable welding quality and processing capacity. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an FPC pressure welding fixture, which can improve the FPC pressure welding quality and processing efficiency.

[0004] The utility model embodiment provides an FPC pressure welding fixture, including a carrier plate and a pressure welding head; the carrier plate is provided with a plurality of positioning holes, the positioning holes are evenly distributed on the carrier plate, and limiting grooves are provided on both sides of the carrier plate; the pressure welding head is installed above the carrier plate, the pressure welding head includes a welding head body and a tinning block, the welding head body is provided with a heat conduction groove, and the bottom of the tinning block is provided with a plurality of arc grooves.

[0005] According to some embodiments of the present invention, a plurality of pins are installed on the carrier plate.

[0006] According to some embodiments of the utility model, a magnet sheet and a flattening sheet are provided on the carrier plate.

[0007] According to some embodiments of the present invention, the carrier plate is a rectangular structure.

[0008] According to some embodiments of the present invention, the positioning holes are circular through holes, and the positioning holes are distributed in a matrix.

[0009] According to some embodiments of the present invention, the number of the arc-shaped grooves is 4, and the 4 arc-shaped grooves are arranged in a straight line.

[0010] According to some embodiments of the present invention, the welding head body is a T-shaped structure.

[0011] According to some embodiments of the present invention, mounting holes are provided on both sides of the heat conducting groove.

[0012] According to some embodiments of the present utility model, a thermocouple socket is provided below the heat-conducting groove.

[0013] According to some embodiments of the present utility model, a through groove is provided above the mounting hole.

[0014] The embodiments of the present invention have at least the following beneficial effects:

[0015] The above-mentioned FPC pressure welding fixture includes a carrier plate and a pressure welding head. The carrier plate is provided with multiple positioning holes to facilitate the positioning of the FPC circuit board and align the gold fingers of the FFC cable with the soldering pads of the FPC circuit board; the pressure welding head includes a welding head body and a tinning block. The welding head body is provided with a heat conduction groove, and the bottom of the tinning block is provided with multiple arc-shaped grooves. The carrier is placed on the welding machine platform according to the position of the limit groove, and the welding machine drives the pressure welding head to move to the welding position of the FPC circuit board. The pressure welding head presses down to press the tin wire on the welding pad of the FPC circuit board, and the arc-shaped groove coincides with the welding position of the FPC circuit board; then pulse heating is performed, and the heat conduction groove allows current to flow through the welding head body to make the bottom of the tin pressing block heat up and melt the tin wire in the arc-shaped groove, thereby completely fusing and connecting the gold fingers of the FFC cable and the FPC circuit board together; the pressure welding surface of the pressure welding head adopts a groove profiling setting, the welding is full and the reliability is high, it can avoid undesirable conditions such as false welding and continuous welding, and improve the FPC pressure welding quality and processing efficiency.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the structure of a carrier plate of an FPC pressure welding jig according to an embodiment of the utility model;

[0019] Figure 2 A schematic structural diagram of a pressure welding head of an FPC pressure welding fixture according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the FPC pressure welding jig during pressure welding according to an embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a carrier board and an FPC circuit board of an FPC pressure welding fixture according to an embodiment of the utility model;

[0022] Figure 5It is a structural schematic diagram of a carrier plate and an FPC cable of an FPC pressure welding fixture according to an embodiment of the utility model.

[0023] Reference numerals:

[0024] Carrier plate 100, positioning hole 110, limiting groove 120, pin 130;

[0025] The welding head 200, the welding head body 210, the heat conduction groove 211, the mounting hole 212, the through groove 213, the tinning block 220, the arc groove 221, and the thermocouple socket 222;

[0026] FPC circuit board 300 , solder pad 310 , FFC cable 400 , FFC gold finger 410 , tin wire 500 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "multiple" means more than two, greater than, less than, and exceeding are understood as not including the number itself, and "above", "below", and "within" are understood as including the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present utility model, unless otherwise clearly defined, words such as “set,” “install,” “connect,” and “connected” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present utility model based on the specific content of the technical solution.

[0031] Please refer to Figure 1 and Figure 2The present embodiment discloses an FPC pressure welding jig, which includes a carrier 100 and a pressure welding head 200; the carrier 100 is provided with a plurality of positioning holes 110, the positioning holes 110 are evenly distributed on the carrier 100, and limiting grooves 120 are provided on both sides of the carrier 100; the pressure welding head 200 is installed above the carrier 100, and the pressure welding head 200 includes a welding head body 210 and a tinning block 220, the welding head body 210 is provided with a heat conduction groove 211, and the bottom of the tinning block 220 is provided with a plurality of arc grooves 221. When placing the FPC circuit board 300 on the carrier 100, it is quickly positioned through the positioning hole 110; after placing the FPC circuit board 300 and the FFC cable 400 on the carrier 100, the carrier 100 is placed on the welding machine platform according to the position of the limit groove 120, and the welding machine is started. The pressure welding head 200 moves according to the welding position coordinates of the FPC circuit board 300, and the tin wire feeding mechanism outputs the tin wire. The pressure welding head 200 presses down to press the tin wire on the FPC gold finger, and the arc groove 221 coincides with the welding position. The tin wire is melted in the arc groove 221 by pulse heating through the K-shaped thermocouple, so that the gold fingers of the FFC cable 400 and the FPC circuit board 300 are completely melted and connected, which can avoid undesirable conditions such as false welding and continuous welding, and improve the quality and processing efficiency of FPC pressure welding.

[0032] Please refer to Figure 1 In some embodiments, a plurality of pins 130 are installed on the carrier 100; specifically, the carrier 100 is made of an aluminum plate, and the thickness of the carrier 100 is 3 mm; the pins 130 protrude from the carrier 100 by 2 to 3 mm, which is convenient for positioning and fixing the FPC circuit board 300.

[0033] Please refer to Figure 1 and Figure 4 In some embodiments, a magnet sheet and a flattening sheet are provided on the carrier 100. For example, the flattening sheet is a stainless steel sheet; the flattening sheet is covered on the laminated FPC circuit board 300 and FFC cable 400, and the flattening sheet is adsorbed by the magnet sheet to flatten the FPC circuit board 300.

[0034] Please refer to Figure 1 In some embodiments, the carrier board 100 is a rectangular structure; the positioning holes 110 are circular through holes, and the positioning holes 110 are distributed in a matrix to facilitate the positioning of the FPC circuit board 300.

[0035] Please refer to Figure 2 In some embodiments, the number of arc-shaped grooves 221 is 4, and the 4 arc-shaped grooves 221 are arranged in a straight line; the bonding surface of the bonding head 200 adopts a groove profiling setting, and the number and arrangement of the arc-shaped grooves 221 are adapted to the gold-plated contacts of the gold fingers of the FPC circuit board 300.

[0036] Please refer to Figure 2 In some embodiments, the main welding head body 210 is a T-shaped structure, with mounting holes 212 disposed on both sides of the heat-conducting groove 211, a thermocouple socket 222 disposed below the heat-conducting groove 211, and a through slot 213 disposed above the mounting hole 212. The pressure welding head 200 is fixed on the frame of the welding machine through the mounting hole 212 and the through slot 213; the thermocouple socket 222 is used to plug in a K-shaped thermocouple, and after the K-shaped thermocouple is plugged in, the bottom of the tin pressing block 220 is heated to melt the tin wire in the arc groove 221.

[0037] When using, please refer to Figures 3 to 5 First, place the FPC circuit board 300 on the carrier board 100 and position it through the positioning hole 110; then align the FFC gold finger 410 of the FFC cable 400 with the pad 310 of the FPC circuit board 300, and stick them together with the adhesive tape on the FPC circuit board 300. Cover the flattening sheet on the already attached FFC cable 400 and FPC circuit board 300, and the magnet sheet on the carrier board 100 adsorbs the flattening sheet to flatten the FPC circuit board 300. After placing the FPC circuit board 300 and the FFC cable 400 on the carrier board 100, put the carrier board 100 on the welding machine platform according to the position of the limit groove 120, start the welding machine, and the pressure welding head 200 moves according to the welding position coordinates of the FPC circuit board 300. At the same time, the tin wire feeding mechanism outputs the tin wire, and the pressure welding head 200 presses down to press the tin wire on the FFC gold finger 410, and the arc groove 221 coincides with the welding position. The tin wire is melted by pulse heating through a K-shaped thermocouple, and the tin wire is melted to fill the inner space of the arc groove 221; in the heated state, the gold fingers of the FFC cable 400 and the FPC circuit board 300 are completely melted and connected together, so that the FFC cable 400 and the FPC circuit board 300 absorb the tin inside the arc groove 221 to combine and form a full state of firm connection; to ensure full welding and high reliability, to avoid poor conditions such as cold welding and continuous welding, and to improve the quality and processing efficiency of FPC pressure welding. After completing the first welding, move to the next point for welding until all FPC circuit boards on the carrier 100 are welded.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An FPC pressure welding jig, characterized in that: include: A carrier plate (100), the carrier plate (100) being provided with a plurality of positioning holes (110), the positioning holes (110) being evenly distributed on the carrier plate (100), and limiting grooves (120) being provided on both sides of the carrier plate (100); A pressure welding head (200), the pressure welding head (200) being mounted above the carrier plate (100), the pressure welding head (200) comprising a welding head body (210) and a tin pressing block (220), the welding head body (210) being provided with a heat conduction groove (211), and the bottom of the tin pressing block (220) being provided with a plurality of arc-shaped grooves (221).

2. The FPC pressure welding jig according to claim 1, characterized in that: A plurality of pins (130) are mounted on the carrier plate (100).

3. The FPC pressure welding jig according to claim 1 or 2, characterized in that: The carrier plate (100) is provided with a magnet sheet and a flattening sheet.

4. The FPC pressure welding jig according to claim 1, characterized in that: The carrier plate (100) is a rectangular structure.

5. The FPC pressure welding jig according to claim 4, characterized in that: The positioning holes (110) are circular through holes, and the positioning holes (110) are distributed in a matrix.

6. The FPC pressure welding jig according to claim 1, characterized in that: The number of the arc-shaped grooves (221) is 4, and the 4 arc-shaped grooves (221) are arranged in a straight line.

7. The FPC pressure welding jig according to claim 1, characterized in that: The welding head body (210) is a T-shaped structure.

8. The FPC pressure welding jig according to claim 7, characterized in that: Mounting holes (212) are provided on both sides of the heat conduction groove (211).

9. The FPC pressure welding jig according to claim 1 or 8, characterized in that: A thermocouple socket (222) is provided below the heat-conducting groove (211).

10. The FPC pressure welding jig according to claim 8, characterized in that: A through slot (213) is provided above the mounting hole (212).

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