A camera module hot pressing device

Abstract

This invention relates to a hot-pressing device for camera modules, comprising a control box, a pressure plate that slides vertically within the control box, and multiple sets of adjustable-spacing, adjustable-position split pressure heads on the pressure plate. Heating tubes are connected to the split pressure heads. A vacuum platform is fixed to the bottom of the control box, and tensioning vacuum plates slide on both sides of the vacuum platform, connected to the vacuum platform by springs. This invention, through the spaced-out, strip-shaped split pressure heads, reduces heat accumulation, ensuring more uniform temperature at any position of the split pressure heads and minimizing the impact of temperature differences on the hot-pressing effect. Furthermore, the split pressure heads can be adjusted left and right in position and spacing, adapting to the production of different FPCA (Fiber Optic Circuit Boards). The tensioning vacuum plates on the vacuum platform can adhere to both sides of the large circuit board and tension it, reducing warping and hollowing phenomena.

Description

Technical Field

[0001] This invention belongs to the field of rigid-flex PCB technology, specifically referring to a camera module hot pressing device. Background Technology

[0002] Adding a camera to a rigid-flex PCB (FPCA) can meet the needs of various special application scenarios, taking into account scenarios that require flexibility, lightweight design, high integration, or adaptability to complex environments.

[0003] During the camera and FPCA assembly process, the operator first needs to cut a large circuit board into multiple smaller strip circuit boards, then attach multiple lenses to the smaller circuit boards, and finally place the large circuit board with multiple cameras attached between two clamps of a hot press. The clamps are heated and driven by cylinders, pressing the circuit board firmly for a certain period of time before removing it.

[0004] The current pressing head is a one-piece heated pressing head. During pressing, heat accumulates in the middle of the pressing head, resulting in a large temperature difference between the central and edge areas. Inconsistent process parameters lead to unstable hot pressing results. Furthermore, the warpage of the circuit board varies under different humidity and temperature conditions, causing differences in flatness during hot pressing, with some areas exhibiting warping or hollow areas. All of these issues affect the hot pressing quality of the camera module. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a camera module hot pressing device, which at least partially solves the above problems.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a camera module hot pressing device, including a control box, a cylinder is provided through the top of the control box, a pressure plate is provided at the telescopic end of the cylinder, and the pressure plate is slidably disposed in the lower middle part of the control box.

[0007] Furthermore, the pressure plate is provided with multiple sets of separate pressure heads, the spacing and position of which can be actively adjusted, and heating tubes are connected to the separate pressure heads.

[0008] Furthermore, positioning frames are slidably provided on both sides of the pressure plate, and the split pressure head is slidably positioned in the positioning frames via a slider. Fastening bolts are connected to both sides of the positioning frames, and the threads of the fastening bolts penetrate the side wall of the pressure plate.

[0009] Furthermore, the positioning frame is rotatably provided with a pitch-changing shaft, which is threadedly connected to the slider. The pitch-changing shaft can adjust the slider to an equidistant state, and the pitch-changing shaft is slidably disposed on the side wall of the pressure plate.

[0010] Furthermore, the bottom of the control box is provided with a vacuum platform, and the vacuum platform is provided with vacuum holes.

[0011] Furthermore, tensioning vacuum plates are slidably provided on both sides of the vacuum stage.

[0012] Furthermore, the side wall of the vacuum stage is provided with a slide rail, and a slide shaft is slidably mounted in the slide rail. The outer end of the slide shaft is mounted on the tension vacuum plate, and the bottom of the slide shaft is provided with a base. A spring is connected between the base and the side wall of the slide rail.

[0013] Furthermore, the slide sidewall has a side hole, a release groove is provided above the side hole, and a stop post is provided in the area of ​​the side hole located in the release groove.

[0014] Furthermore, a wrench is rotatably mounted on the sliding shaft. The size of the wrench is adapted to the side hole, the release groove, and the stop post. The wrench can slide in the side hole and rotate through the area between the release groove and the stop post.

[0015] Furthermore, air channels are provided on both sides of the vacuum stage, and a connecting rod is provided on the side wall of the tensioning vacuum plate. The connecting rod is slidably disposed in the air channel, and the tensioning vacuum plate is connected to the outside through the connecting rod.

[0016] The beneficial effects achieved by this invention are as follows: the spaced strip-shaped split pressure head can reduce heat accumulation, making the temperature of the split pressure head more uniform at any position, reducing the impact of temperature difference on the hot pressing effect, and the split pressure head can adjust its position and spacing left and right to adapt to the production of different FPCAs, while the tensioning vacuum plate on the vacuum stage can adsorb the two sides of the large circuit board and tighten the circuit board to reduce the warping and hollow phenomenon of the circuit board. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the camera module hot pressing device according to an embodiment of the present invention;

[0018] Figure 2 This is a diagram showing the positional relationship of each component pressure head under the pressure plate;

[0019] Figure 3 A broken view of the state of the wrench being locked on the vacuum stage;

[0020] Figure 4 A fractured view of the state of the wrench being released on the vacuum stage;

[0021] Figure 5 A diagram showing the positional relationship between the sliding shaft, spring, and wrench;

[0022] Figure 6 This is a fracture view of the vacuum stage.

[0023] The components are as follows: 1. Control box; 2. Cylinder; 3. Pressure plate; 4. Positioning frame; 5. Pitch shaft; 6. Fastening bolt; 7. Slider; 8. Split pressure head; 9. Heating tube; 10. Vacuum stage; 11. Tensioning vacuum plate; 12. Sliding shaft; 13. Spring; 14. Connecting rod; 15. Wrench; 16. Base; 17. Air passage; 18. Slide; 19. Side hole; 20. Stop post; 21. Release groove.

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] like Figure 1 and Figure 2 As shown in the figure, the camera module hot pressing device proposed in this embodiment of the invention includes a control box 1, a cylinder 2 is provided through the top of the control box 1, and a pressure plate 3 is provided at the telescopic end of the cylinder 2. The pressure plate 3 is slidably disposed in the lower middle part of the control box 1. The lower end of the control box 1 is in an open state to allow the FPCA material to be released. When the cylinder 2 telescopically extends, it can drive the pressure plate 3 to move up and down to press the camera attached to the FPCA below. The control box 1 is equipped with an electrical control system (not shown in the figure) that can heat the pressure plate 3 so that the temperature of the pressing operation reaches the process requirements.

[0028] To reduce the temperature concentration in the central area of ​​the pressure plate 3 and reduce the temperature difference between the central and edge areas, the pressure plate 3 is equipped with multiple sets of separate pressure heads 8. The spacing and position of the separate pressure heads 8 can be actively adjusted. Heating tubes 9 are connected to the separate pressure heads 8. In some embodiments, the electrical control system in the control box 1 heats the separate pressure heads 8 through the heating tubes 9, instead of heating the entire pressure plate 3. The separate pressure heads 8 only need to be aligned with the position of the camera on the FPCA to complete the compaction operation. The gaps between the separate pressure heads 8 can dissipate heat evenly, avoid heat accumulation, and make the process more stable.

[0029] In order to actively adjust the position and spacing between the split pressure heads 8 so that they coincide with the position of the camera on the FPCA, when it is necessary to adjust the position of the split pressure heads 8 in the horizontal working direction, positioning frames 4 are slidably provided on both sides of the pressure plate 3. The split pressure heads 8 are slidably placed in the positioning frames 4 through the sliders 7. Fastening bolts 6 are connected to both sides of the positioning frames 4. The fastening bolts 6 are threaded through the side wall of the pressure plate 3. The positioning frames 4 slide inside the side wall of the pressure plate 3 and move the split pressure heads 8 inside to the required working position. Then, the fastening bolts 6 on both sides are rotated. The fastening bolts 6 on both sides move in the same direction, but when the fastening bolt 6 on one side rotates inward, the fastening bolt 6 on the other side rotates outward, thereby fixing the positioning frames 4 in place.

[0030] When it is necessary to adjust the spacing of the split pressure heads 8 to match the spacing of each FPCA segment divided on the large circuit board, a variable pitch shaft 5 is rotatably provided on the positioning frame 4. The variable pitch shaft 5 and the positioning frame 4 will not slide relative to each other. The variable pitch shaft 5 is threadedly connected to the slider 7. The two sides of the variable pitch shaft 5 have symmetrical threads, and the pitch of the threads on both sides gradually increases. The variable pitch shaft 5 can adjust the slider 7 to an equidistant state, and the distance between the sliders 7 can be adjusted according to the number of rotations of the variable pitch shaft 5, so that the split pressure heads 8 on the slider 7 are adjusted to the target spacing. The variable pitch shaft 5 is slidably mounted on the side wall of the pressure plate 3. When the variable pitch shaft 5 rotates threadedly relative to the positioning frame 4, the variable pitch shaft 5 can also rotate relative to the pressure plate 3. When the variable pitch shaft 5 slides horizontally with the positioning frame 4, the variable pitch shaft 5 can also slide relative to the pressure plate 3.

[0031] like Figures 3-6 As shown, in order to fix the entire large circuit board during the hot pressing process and prevent slippage, the bottom of the control box 1 is provided with a vacuum stage 10. The vacuum stage 10 is provided with vacuum holes and positioning strips (not shown in the attached figure). The vacuum holes can provide negative pressure to adsorb and fix the circuit board, and the positioning strips play a positioning role in the loading of the circuit board.

[0032] In order to keep the circuit board fixed on the vacuum stage 10 flat and avoid local warping and hollowing, tension vacuum plates 11 are slidably provided on both sides of the vacuum stage 10. The tension vacuum plates 11 have tensioning and adsorption functions. The tension vacuum plates 11 can provide negative pressure adsorption force to adsorb and fix the two sides of the large circuit board. After the fixation is completed, the tension vacuum plates 11 slide to both sides to make the circuit board tensioned and tend to be flat. Then the vacuum stage 10 adsorbs the middle part.

[0033] The vacuum stage 10 has a slide rail 18 on its side wall, and a slide shaft 12 is slidably mounted inside the slide rail 18. The outer end of the slide shaft 12 is mounted on the tension vacuum plate 11. The bottom of the slide shaft 12 is provided with a base 16. A spring 13 is connected between the base 16 and the side wall of the slide rail 18. The spring 13 always pushes the slide shaft 12 outward, thereby causing the tension vacuum plate 11 to move outward so that the circuit board is kept taut.

[0034] The slide 18 has a side hole 19 on its side wall, a release groove 21 is provided above the side hole 19, and a stop post 20 is provided in the area of ​​the side hole 19 located in the release groove 21.

[0035] A wrench 15 is rotatably mounted on the sliding shaft 12. The size of the wrench 15 is adapted to the side hole 19, the release groove 21, and the stop post 20. The wrench 15 can slide in the side hole 19 and can rotate through the area between the release groove 21 and the stop post 20. If the wrench 15 is located inside the stop post 20, the wrench 15 is blocked by the stop post 20, which restricts the sliding shaft 12 from popping out. If the wrench 15 is rotated upward 90 degrees into the release groove 21, then slid past the stop post 20, and then rotated downward 90 degrees, the wrench 15 is no longer blocked by the stop post 20. The sliding shaft 12 will pop out under the action of the spring 13, and the wrench 15 will slide along the side hole 19, thereby causing the tension vacuum plate 11 to pop out. The spring 13 can actively release or contract to control the horizontal position of the tension vacuum plate 11.

[0036] In order to generate negative pressure suction during the sliding process, the vacuum platform 10 is provided with air passages 17 on both sides, and the side wall of the tensioning vacuum plate 11 is provided with a connecting rod 14. The connecting rod 14 is slidably disposed in the air passage 17, and the tensioning vacuum plate 11 is connected to the outside through the connecting rod 14.

[0037] Before use, adjust the position parameters of the upper split pressure head 8 mold. Adjust the spacing of each split pressure head 8 according to the spacing of each FPCA piece cut on the circuit board. That is, rotate the pitch shaft 5, and the slider 7 on the pitch shaft 5 moves the corresponding distance. The spacing between adjacent sliders 7 always remains the same. When the spacing of sliders 7 is the same as the spacing of FPCA, stop rotating the pitch shaft 5.

[0038] Then rotate the fastening bolt 6 outward and move the positioning frame 4 left and right so that the split pressure head 8 on each slider 7 is aligned with the camera on the FPCA after positioning. Then rotate the fastening bolt 6 inward to tighten the fastening bolt 6 against the positioning frame 4 so that the positioning frame 4 no longer moves left and right.

[0039] After the split pressure head 8 is adjusted, place the entire large circuit board on the vacuum stage 10 so that the circuit board fits with the positioning strip on the vacuum stage 10. At this time, the vacuum stage 10 does not generate negative pressure, and the circuit board can slide left and right. The edge of the circuit board is on the tension vacuum plate 11. The tension vacuum plate 11 works under negative pressure and adsorbs and fixes the circuit board.

[0040] Then, first rotate the wrench 15 upwards by 90 degrees so that it passes the stop post 20, and then rotate it downwards by 90 degrees. The wrench 15 is no longer blocked by the stop post 20. The sliding shaft 12 pops outwards under the action of the spring 13, and drives the tensioning vacuum plate 11 to pop outwards. The upper wall of the tensioning vacuum plate 11 is attached to the bottom of the circuit board, thereby driving the circuit board to be tensioned to both sides, keeping the circuit board flat and improving the compaction quality.

[0041] Then, cylinder 2 is activated, which moves pressure plate 3 downward. Pressure plate 3 drives the split pressure head 8 to move down onto the camera on the FPCA. The split pressure head 8 is heated by heating tube 9, thus achieving hot pressing. After the hot pressing time is reached, cylinder 2 moves upward and reverses the operation of wrench 15 to place the next circuit board.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A camera module hot pressing device, comprising a control box (1), characterized in that, Also includes: The pressure plate (3) is slidably disposed in the control box (1). The pressure plate (3) is provided with multiple sets of split pressure heads (8) that can slide and adjust the spacing and position. The split pressure heads (8) are connected to heating tubes (9). Vacuum stage (10) is fixed to the bottom of control box (1). Tensioning vacuum plates (11) are slidably provided on both sides of the vacuum stage (10). The tensioning vacuum plates (11) are connected to the vacuum stage (10) by springs (13). The tensioning vacuum plates (11) can slide outward and adsorb and fix the camera module. The pressure plate (3) is slidably provided with positioning frames (4) on both sides. The split pressure head (8) is slidably provided in the positioning frame (4) through the slider (7). The positioning frame (4) is connected with fastening bolts (6) on both sides. The fastening bolts (6) are threaded through the side wall of the pressure plate (3). The positioning frame (4) is rotatably provided with a variable pitch shaft (5), which is threadedly connected to the slider (7). The variable pitch shaft (5) can adjust the slider (7) to an equidistant state. The variable pitch shaft (5) is slidably provided on the side wall of the pressure plate (3). The vacuum stage (10) has a slide (18) on its side wall. A slide shaft (12) is slidably provided in the slide (18). The outer end of the slide shaft (12) is provided on the tension vacuum plate (11). A base (16) is provided at the bottom of the slide shaft (12). The spring (13) is connected between the base (16) and the side wall of the slide (18).

2. The camera module hot pressing device according to claim 1, characterized in that: A cylinder (2) is installed through the control box (1), and the telescopic end of the cylinder (2) is located on the pressure plate (3).

3. The camera module hot pressing device according to claim 1, characterized in that: The slide (18) has a side hole (19) on its side wall, and a release groove (21) is provided above the side hole (19). A stop post (20) is provided in the area of ​​the side hole (19) located in the release groove (21).

4. The camera module hot pressing device according to claim 3, characterized in that: A wrench (15) is rotatably mounted on the sliding shaft (12). The size of the wrench (15) is adapted to the side hole (19), the release groove (21) and the stop post (20). The wrench (15) can slide in the side hole (19) and can rotate through the area between the release groove (21) and the stop post (20).

5. The camera module hot pressing device according to claim 1, characterized in that: The vacuum stage (10) has air passages (17) on both sides, and the tension vacuum plate (11) has a connecting rod (14) on its side wall. The connecting rod (14) is slidably disposed in the air passage (17), and the tension vacuum plate (11) is connected to the outside through the connecting rod (14).

Images