A jig integrated tool for mounting a steel sheet with a boss

Abstract

The utility model relates to printed circuit board manufacturing technical field discloses a kind of jig integrated tool for pasting strip boss steel sheet, including limit jig, with the limit slot hole for accommodating and limiting steel sheet;Support jig is set below limit jig and supports limit jig, FPC is set between support jig and the limit jig;Compression jig is located above limit jig, for compression strip boss steel sheet and FPC;The support jig has the first position-avoiding groove for avoiding boss;The compression jig has the pressing block that projects downward, the projection of pressing block in horizontal plane covers the limit slot hole and slightly expands outward, and steel sheet in limit slot hole is contacted by pressing block and provides the force of downward compression. The utility model can avoid uneven pressure caused by pressing boss;And by pressing block, steel sheet area is specifically compressed, not whole board compression, prevent product surface uneven pops up compression jig, and each jig is integrated into integrated tool to realize mass production.

Description

Technical Field

[0001] This utility model relates to the field of printed circuit board manufacturing technology, and in particular to an integrated tooling fixture for mounting steel sheets with bosses. Background Technology

[0002] FPC itself is soft, and in some applications that require withstanding certain mechanical stress or external forces, such as the folding parts of electronic products and the frequently bent areas of wearable devices, its mechanical strength may be insufficient. By using... Figure 1 The steel sheet with bosses (injection molded parts) shown is pressed onto the surface of the FPC, which can significantly improve the overall strength and rigidity of the FPC, enabling it to better resist external forces and prevent deformation, breakage and other problems during use, thereby improving the reliability and service life of the product.

[0003] Lamination typically requires a relatively flat surface. Conventional methods for laminating steel sheets with bosses, such as the fixture and lamination method disclosed in patent application CN201410201033.2 (which automatically attaches reinforcing steel sheets to flexible circuit boards), are prone to uneven pressure due to the interference of the bosses. This can prevent the steel sheet from forming a uniform bond with other materials being laminated, thus affecting the lamination effect. For example, it may lead to problems such as weak local bonding or gaps. Furthermore, since electronic components are usually mounted on the surface of FPCs, conventional lamination methods can easily damage these components.

[0004] For the reasons mentioned above, the traditional method for mounting such steel sheets with bosses involves manually applying adhesive to the FPC and then manually using a positioning fixture to attach each steel sheet one by one. The steel sheets are then manually squeezed to ensure full adhesive contact before baking. This method is cumbersome and time-consuming, failing to meet the demands of efficient production. Furthermore, the bonding quality is inconsistent; it is difficult to precisely control the distribution and thickness of the adhesive when manually squeezing the steel sheets, and air can easily be trapped into the adhesive layer during the bonding process, creating air bubbles. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an integrated fixture for mounting steel sheets with bosses that can uniformly adhere to components without damaging them, in light of the above-mentioned technical status.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an integrated tooling fixture for mounting steel sheets with bosses, characterized in that it includes... A limiting fixture having a limiting slot for accommodating and limiting a steel sheet; A support fixture is disposed below the limiting fixture and supports the limiting fixture; an FPC is disposed between the support fixture and the limiting fixture. A pressing fixture, located above the limiting fixture, is used to press the steel sheet with bosses to the FPC; Its features are, The support fixture has a first clearance groove for the clearance boss; The pressing fixture has a downward protruding pressing block. The projection of the pressing block on the horizontal plane covers the limiting slot and is slightly outward relative to the limiting slot. The pressing block contacts the steel sheet in the limiting slot and provides a downward pressing force.

[0007] To prevent uneven stress during steel sheet mounting due to uneven product surfaces, preferably, the protrusion height of the pressing block relative to the lower surface of the pressing fixture is not less than 1mm, and the lower surface of the pressing block is expanded outwards relative to the limiting slot hole by not less than 0.2mm. With this structure, the pressing fixture uses the pressing block to specifically press the steel sheet area, rather than pressing the entire sheet, and the pressing block is slightly expanded outwards relative to the limiting slot hole to accommodate tolerances.

[0008] Furthermore, the support fixture also includes a second clearance groove, which is used to avoid electronic components mounted on the FPC surface.

[0009] Preferably, the bottom surface of the first clearance groove of the support fixture is at least 0.2 mm away from the boss of the steel plate with the boss, the bottom surface of the second clearance groove of the support fixture is at least 0.1 mm away from the electronic component, and the cross-section of the second clearance groove is at least 0.2 mm outward relative to the electronic component.

[0010] Preferably, the fixture integration tooling further includes a first adhesive for bonding the steel sheet to the FPC, the first adhesive being disposed on the outer surface of the through hole of the FPC and confined within the limiting slot of the limiting fixture.

[0011] To achieve full board alignment and bonding, the fixture integration tooling further includes a second adhesive for fixing the steel sheet to the limiting fixture. The second adhesive is disposed between the pressing fixture and the limiting fixture. The second adhesive includes a base surface and an adhesive surface. The base surface is in contact with the pressing fixture, and the adhesive surface is in contact with the limiting fixture and the steel sheet.

[0012] To prevent misalignment of the components during the mounting process, the fixture integration tooling preferably includes vertically arranged positioning pins that pass through and position the support fixture, FPC, limiting fixture, and second adhesive in sequence.

[0013] Specifically, the positioning pin includes a pin base and a pin body. The pin base is embedded in the support fixture, and the pin body extends upward from the pin base and passes through the FPC, the limiting fixture, and the second colloid.

[0014] To further integrate the tooling, preferably, the supporting fixture and the pressing fixture are connected by a vertical connecting side plate, the supporting fixture is fixedly connected to the connecting side plate, and the pressing fixture is hinged to the connecting side plate.

[0015] Compared with the prior art, the advantages of this utility model are: By using a limiting fixture to limit the steel sheet, the boss can be aligned with the through hole of the FPC; the support fixture can support the limiting fixture, FPC and pressing fixture, and the first clearance groove opened on the support fixture can prevent uneven pressure caused by pressing the boss. The pressing fixture has protruding pressure blocks that are specifically designed to press specific areas of the steel sheet, rather than pressing the entire sheet. This prevents uneven product surfaces from lifting the pressing fixture, thus avoiding situations where some areas are not stressed or have uneven stress. Finally, integrating all the fixtures into a single tooling unit enables mass production. The tooling of this utility model can ensure both accuracy and work efficiency, and can also achieve simultaneous pressing and baking, thereby avoiding the problem that the steel sheet and glue cannot make full and uniform contact during baking in traditional solutions. Attached Figure Description

[0016] Figure 1 The steel sheet with boss and FPC targeted in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the assembly of the first colloid, the second colloid, the limiting fixture, and the product to be mounted in Embodiment 1 of this utility model. Figure 3 This is a schematic diagram of the steel sheet with boss and FPC during the alignment and assembly process, as described in Embodiment 1 of this utility model. Figure 4 This is a partial cross-sectional schematic diagram of Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of Embodiment 1 of this utility model. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0018] like Figures 1-5 The image shows a preferred embodiment of the integrated tooling for mounting steel sheets with bosses according to this utility model.

[0019] The target to be pressed in this embodiment is as follows: Figure 1The diagram shows a steel sheet with a boss and an FPC3. The steel sheet 1 with the boss is made of SUS stainless steel, and the boss 2 is an injection-molded part connected to the lower surface of the steel sheet 1. The FPC3 has a through hole 5, the diameter of which matches the diameter of the boss 2. Electronic components 4 are attached to the lower surface of the FPC3. When the two are pressed together, the boss 2 protrudes from the lower surface of the FPC3, and the lower surface of the steel sheet 1 is in contact with the upper surface of the FPC3. To improve the pressing effect, this embodiment proposes an integrated fixture tooling that integrates a support fixture 10, a limiting fixture 8, and a pressing fixture 13.

[0020] like Figure 4 As shown, the support fixture 10 is located at the bottom layer and is used to support the limiting fixture 8, the pressing fixture 13, and the FPC3 and the steel sheet with bosses to be pressed. The upper surface of the support fixture 10 has a first clearance groove 11 for avoiding the bosses 2 of the steel sheet with bosses. The bottom surface of the first clearance groove 11 is at least 0.2 mm away from the bosses 2 to avoid uneven pressure during the pressing process. To prevent the surface-mount electronic components 4, such as IC components, on the FPC3 from being squeezed and damaged during the pressing process, the support fixture 10 also has a second clearance groove 12. The second clearance groove 12 corresponds to the position of the electronic components 4, and its bottom surface is at least 0.1 mm away from the electronic components 4. Its cross-section is at least 0.2 mm wider than the electronic components 4.

[0021] A limiting fixture 8 is positioned above the supporting fixture 10 and has a limiting slot 9 that penetrates the wall thickness. The limiting slot 9 is used to limit the steel sheet 1, and its dimensions are 1:1 with those of the steel sheet 1. If the tolerance for misalignment is large, it can be appropriately relaxed. A second adhesive 7 is attached to the upper surface of the limiting fixture 8. The second adhesive 7 includes a base surface 7a and an adhesive surface 7b. The base surface 7a contacts the upper pressing fixture 13, and the adhesive surface 7b contacts the lower limiting fixture 8. After the second adhesive 7 is attached, one end of the limiting slot 9 is closed by the second adhesive 7. After the steel sheet 1 enters the limiting slot 9, its surface is in contact with the second adhesive 7 on the closed end face, and the boss 2 extends downward out of the limiting slot 9.

[0022] In this embodiment, the second adhesive 7 is a heat-resistant adhesive. The heat-resistant adhesive is tacky at room temperature, but loses its tackiness within a specific temperature range, making it easy to peel the mounted product from the second adhesive 7 after baking.

[0023] FPC3 is positioned between the limiting fixture 8 and the supporting fixture 10, with the through hole 5 of FPC3 directly opposite the boss 2 extending out of the limiting slot 9. For example... Figure 2 and Figure 3 As shown, the outer surface of the through hole 5 of FPC3 is coated with a first adhesive 6 for bonding the steel sheet 1 and FPC3. The first adhesive 6 is confined within the limiting slot 9 of the limiting fixture 8.

[0024] The pressing fixture 13 is positioned above the limiting fixture 8 and has a downwardly protruding pressing block 14. The projection of the pressing block 14 on the horizontal plane covers the limiting slot 9 and slightly expands outward relative to the limiting slot 9. The pressing fixture 13 uses the pressing block 14 to press only a specific area of ​​the steel sheet 1, rather than pressing the entire sheet, which can prevent uneven force on the steel sheet 1 during installation due to uneven product surface. The protrusion height of the pressing block 14 relative to the lower surface of the pressing fixture 13 is not less than 1 mm, and the lower surface of the pressing block 14 expands outward relative to the limiting slot 9 by not less than 0.2 mm to accommodate tolerances.

[0025] This embodiment also includes a vertically arranged positioning pin 15. The positioning pin 15 includes a pin base 15a and a pin body 15b. The pin base 15a is embedded in the support fixture 10. The pin body 15b extends upward from the pin base 15a and passes through the FPC3, the limiting fixture 8 and the second adhesive 7, effectively preventing the structure from shifting during the mounting process.

[0026] To further integrate the tooling, in this embodiment, the support fixture 10 and the pressing fixture 13 are connected by a vertical connecting side plate 16. The support fixture 10 is fixedly connected to the connecting side plate 16, and the pressing fixture 13 is hinged to the connecting side plate 16. The pressing fixture 13 can be rotated 90° to open and close.

[0027] The usage process of this embodiment is as follows: Figure 2 As shown, the second adhesive 7 is placed upside down with the adhesive surface 7b facing upwards, and the limiting fixture 8 is attached to the adhesive surface 7b; the steel sheet 1 is placed in the limiting slot 9 and attached upside down to the adhesive surface 7b; the first adhesive 6 is placed around the upper surface of the required through hole 5 of the FPC3 to bond the steel sheet 1; as shown... Figure 3 As shown, after flipping the limiting fixture 8, the boss 2 passes through the through hole 5 of the FPC3, and the steel sheet 1 is attached to the FPC3; as Figure 4 As shown, the entire assembly obtained from the above steps is assembled and baked using the positioning pins 15 to support the fixture 10 and the pressing fixture 13. Finally, the pressing fixture 13, the limiting fixture 8 and the support fixture 10 are removed, and the second adhesive 7, which has lost its adhesiveness through baking, is peeled off, thus completing the mounting of the steel sheet with bosses to the FPC3.

Claims

1. A jig integrated tooling for mounting steel plates with bosses, comprising: The limiting fixture (8) has a limiting slot (9) for accommodating and limiting the steel sheet (1); A support fixture (10) is disposed below the limiting fixture (8) and supports the limiting fixture (8); an FPC (3) is disposed between the support fixture (10) and the limiting fixture (8); A pressing fixture (13) is located above the limiting fixture (8) and is used to press the steel sheet with the boss and the FPC (3); Its features are, The support fixture (10) has a first clearance groove (11) for the clearance boss (2); The pressing fixture (13) has a downward protruding pressing block (14). The projection of the pressing block (14) on the horizontal plane covers the limiting slot (9) and is slightly outward relative to the limiting slot (9). The pressing block contacts the steel sheet in the limiting slot (9) and provides a downward pressing force.

2. The integrated tooling fixture according to claim 1, characterized in that, The protrusion height of the pressing block (14) of the pressing fixture (13) relative to the lower surface of the pressing fixture (13) is not less than 1 mm, and the lower surface of the pressing block (14) is expanded outward by not less than 0.2 mm relative to the limiting slot (9).

3. The integrated fixture according to claim 1 or 2, characterized in that, The support fixture (10) also includes a second clearance groove (12), which is used to avoid electronic components (4) mounted on the surface of the FPC (3).

4. The tooling of claim 3, wherein, The bottom surface of the first clearance groove (11) of the support fixture (10) is not less than 0.2 mm away from the boss (2) with the boss steel sheet, the bottom surface of the second clearance groove (12) of the support fixture (10) is not less than 0.1 mm away from the electronic component (4), and the cross-section of the second clearance groove (12) is not less than 0.2 mm outward relative to the electronic component (4).

5. The integrated fixture according to claim 1, characterized in that, It also includes a first adhesive (6) for bonding the steel sheet (1) and the FPC (3), the first adhesive (6) being disposed on the outer surface of the through hole (5) of the FPC (3) and confined within the limiting slot (9) of the limiting fixture (8).

6. The integrated fixture according to claim 5, characterized in that, It also includes a second adhesive (7) for fixing the steel sheet (1) to the limiting fixture (8). The second adhesive (7) is disposed between the pressing fixture (13) and the limiting fixture (8). The second adhesive (7) includes a base surface (7a) and an adhesive surface (7b). The base surface (7a) is in contact with the pressing fixture (13), and the adhesive surface (7b) is in contact with the limiting fixture (8) and the steel sheet (1).

7. The tooling of claim 1 wherein, It also includes a vertically arranged positioning pin (15), which passes through and positions the support fixture (10), FPC (3), limiting fixture (8), and second colloid (7) in sequence.

8. The integrated fixture according to claim 7, characterized in that, The positioning pin (15) includes a pin base (15a) and a pin body (15b). The pin base (15a) is embedded in the support fixture (10), and the pin body (15b) extends upward from the pin base (15a) and passes through the FPC (3), the limiting fixture (8), and the second colloid (7).

9. The tooling of claim 1 wherein, The support fixture (10) and the pressing fixture (13) are connected by a vertical connecting side plate (16). The support fixture (10) and the connecting side plate (16) are fixedly connected, and the pressing fixture (13) and the connecting side plate (16) are hinged.

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