Special jig for preventing deformation during welding of flexible printed circuit (FPC)

Abstract

The utility model relates to the technical field of FPC (Flexible Printed Circuit) processing, in particular to an anti-deformation special jig for FPC (Flexible Printed Circuit) flexible board welding, which comprises a base and a gland, a positioning groove is formed in the middle of the base, a plurality of receding grooves are symmetrically formed in the positioning groove, a guide groove is formed in the position, corresponding to each receding groove, of the base, and magnetic attraction positioning areas are arranged at the two ends of the base. Positioning areas are arranged at two ends of the gland, a movable groove is formed in the middle of the gland, a pressing plate is connected in the movable groove through a pressure spring, and pressing needles corresponding to the guide grooves in position and consistent with the guide grooves in number are arranged on two sides of the pressing plate. The FPC flexible board and the PCB are placed in the positioning groove of the base after being attached, the PIN is attached to the guide groove, the gland is covered, the magnetic attraction positioning area and the positioning area are in positioning fit, positioning and tight attraction, the gland does not need to be manually pressed, meanwhile, the PIN is pressed by the pressing needle, the PIN is prevented from moving in the guide groove, it is effectively guaranteed that the FPC flexible board is prevented from deforming and deviating in the welding process, and the welding quality is improved. And the yield during welding is ensured.

Description

Technical Field

[0001] This utility model relates to the field of FPC processing technology, and in particular to a special fixture for preventing deformation during welding of FPC flexible plates. Background Technology

[0002] After the SMT components are attached to the FPC board, the FPC board is then attached to the PCB board for soldering. Because the FPC board is relatively soft, it is difficult to position during soldering, and it is easy to misalign during soldering, resulting in problems such as arching or warping in some areas. Therefore, a special fixture is needed to solve this problem. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a special fixture for welding FPC flexible plates to prevent deformation, including: a base and a pressure cap that is magnetically attracted to the base and cooperates to fix the FPC flexible plate to the base;

[0004] The base has a positioning groove in the middle that matches the FPC flexible board. The positioning groove is symmetrically provided with several clearance grooves arranged side by side and penetrating the base. Each clearance groove has a guide groove in the base that matches the pin of the FPC flexible board. Magnetic positioning areas are provided at both ends of the base.

[0005] The pressure cap has positioning areas at both ends that cooperate with the magnetic positioning area for positioning. The pressure cap has a movable groove in the middle, and a pressure plate is connected in the movable groove through a compression spring. The pressure plate has pressure pins on both sides that correspond to the position of the guide groove and have the same number.

[0006] Furthermore, a groove is provided on the base on one side of the magnetic positioning area, and the depth of the groove is greater than the depth of the positioning groove.

[0007] Furthermore, the depth of the guide groove is consistent with the depth of the pin.

[0008] Furthermore, the magnetic positioning area includes a magnet embedded in the base and a set of positioning holes located on the edge of the magnet. The positioning area also includes a set of positioning posts that are respectively inserted into the set of positioning holes.

[0009] Furthermore, a machining position hole is provided on the base at the edge of the positioning groove.

[0010] Furthermore, the base is equipped with a feed indicator mark.

[0011] Furthermore, a magnetic cover is provided on the pressure plate.

[0012] Furthermore, the cap and the pressure plate are provided with several hollowed-out slots.

[0013] The beneficial effects of this utility model are as follows: After the FPC flexible board is attached to the PCB board, it is placed in the positioning groove of the base so that the PIN pins are in contact with the guide groove. Then the pressure cover is put on, so that the magnetic positioning area and the positioning area are positioned and clamped together. There is no need to manually press the pressure cover. At the same time, the pressure pins press the PIN pins to prevent the PIN pins from moving in the guide groove. This effectively prevents the FPC flexible board from deforming and deviating during soldering, and ensures the yield rate during soldering. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the base structure in this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the pressure cap of this utility model;

[0016] Figure 3 for Figure 2 Sectional view at point AA. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a special fixture for preventing deformation during welding of FPC flexible boards. The special fixture for preventing deformation during welding of FPC flexible boards includes a base 10 and a pressure cap 20.

[0019] The base 10 has a positioning groove 101 in the middle that matches the FPC flexible board. The depth of the positioning groove 101 is consistent with the thickness of the FPC flexible board and the PCB board after they are bonded together, so as to facilitate product positioning and product removal. The positioning groove 101 has several clearance grooves 102 arranged side by side and penetrating the base 10. Each clearance groove 102 has a guide groove 103 in the base 10 that matches the pin of the FPC flexible board. The depth of the guide groove 103 is consistent with the depth of the pin. The base 10 has magnetic positioning areas 104 at both ends. The clearance grooves 102 are provided to prevent the components on the PCB board from being crushed or deformed. The pressure cover 20 has positioning areas 201 at both ends that cooperate with the magnetic positioning areas 104 for positioning. The pressure cover 20 has a movable groove 202 in the middle. A pressure plate 203 is connected to the movable groove 202 via a compression spring. Pressure pins 204, corresponding in position and number to those in the guide groove 103, are provided on both sides of the pressure plate 203. The movable pressure plate 203 prevents damage or deformation of the pins when the pressure pins 204 are pressed down, thus providing a buffering effect. After the FPC flexible board is attached to the PCB board, it is placed in the positioning groove 101 of the base 10, allowing the pins to fit against the guide groove 103. The pressure cover 20 is then placed on top, positioning the magnetic positioning area 104 and the positioning area 201 in a coordinated and tight manner. Manual pressing of the pressure cover 20 is not required. Simultaneously, the pressure pins 204 press the pins firmly, preventing the pins from moving within the guide groove 103. This effectively prevents deformation and misalignment of the FPC flexible board during soldering, ensuring a high yield rate during soldering.

[0020] Specifically, the magnetic positioning area 104 includes a magnet embedded in the base 10 and a set of positioning holes 1041 located on the edge of the magnet. The positioning area 201 includes a set of positioning posts 2011 that are respectively inserted into the set of positioning holes 1041. The pressure plate 203 is provided with a magnetic cover plate 205. The magnetic cover plate 205 enables the magnet to attract the pressure cover 20. The magnetic cover plate 205 is made of iron or magnet, and a set of positioning posts 2011 pass through the magnetic cover plate 205. By setting the corresponding positioning posts 2011 and positioning holes 1041, the pressure cover 20 can be quickly and accurately installed on the base 10, ensuring that each pressure pin 204 accurately presses the PIN foot in the guide groove 103. By using the principle of magnetic attraction, the pressure cover 20 and the base 10 are fixed to each other, replacing the manual pressing method, which can effectively prevent the pressure pin 204 from deforming the PIN foot.

[0021] In addition, a groove 105 is provided on the base 10 on one side of the magnetic positioning area 104. The depth of the groove 105 is greater than the depth of the positioning groove, so that the product can be easily taken out through the groove 105.

[0022] To facilitate the processing and manufacturing of the base 10, a processing position hole 106 is provided on the base 10 at the edge of the positioning groove 101. The processing position hole 106 facilitates the fixing of the base 10 onto the corresponding equipment for processing and manufacturing. During the processing of the base 10, a feeding indicator mark 107 for the feeding direction of the material during welding will be processed on the base 10. The feeding indicator mark 107 can prevent the problem of the fixture being placed backwards. In addition, the model number of the product and the production time of the base 10 will also be processed on the base 10 during the manufacturing process.

[0023] To reduce the weight of the pressure cover 20, several hollow slots 206 are provided on the pressure cover 20 and the pressure plate 203. By setting multiple hollow slots 206, internal misalignment and other defects can be observed. At the same time, more hot air can enter to melt the solder paste on the PCB board during the reflow process.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0027] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A special fixture for preventing deformation during welding of FPC flexible boards, characterized in that, include: The base and the pressure cap that magnetically attracts and cooperates with the base to fix the FPC flexible board to the base; The base has a positioning groove in the middle that matches the FPC flexible board. The positioning groove is symmetrically provided with several clearance grooves arranged side by side and penetrating the base. Each clearance groove has a guide groove in the base that matches the pin of the FPC flexible board. Magnetic positioning areas are provided at both ends of the base. The pressure cap has positioning areas at both ends that cooperate with the magnetic positioning area for positioning. The pressure cap has a movable groove in the middle, and a pressure plate is connected in the movable groove through a compression spring. The pressure plate has pressure pins on both sides that correspond to the position of the guide groove and have the same number.

2. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 1, characterized in that, A groove is provided on the base on one side of the magnetic positioning area, and the depth of the groove is greater than the depth of the positioning groove.

3. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 1, characterized in that, The depth of the guide groove is the same as the depth of the pin.

4. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 1, characterized in that, The magnetic positioning area includes a magnet embedded in the base and a set of positioning holes located on the edge of the magnet. The positioning area also includes a set of positioning posts that are respectively inserted into the set of positioning holes.

5. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 1, characterized in that, A machining position hole is provided on the base at the edge of the positioning groove.

6. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 1, characterized in that, The base is equipped with a feed indicator mark.

7. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 4, characterized in that, The pressure plate is equipped with a magnetic cover.

8. The special fixture for preventing deformation during welding of FPC flexible plates according to claim 1, characterized in that, The cap and the pressure plate are provided with several hollowed-out slots.

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