Camera module hot pressing device

Abstract

The invention relates to a camera module hot-pressing device which comprises a control box, a pressing plate is arranged in the control box in an up-down sliding mode, a plurality of sets of split pressing heads capable of adjusting intervals and positions are arranged on the pressing plate, heating pipes are connected to the split pressing heads, a vacuum table is fixed to the bottom of the control box, and tensioning vacuum plates are arranged on the two sides of the vacuum table in a sliding mode. And the tensioning vacuum plate is connected to the vacuum table through a spring. According to the invention, heat accumulation can be reduced through the split pressure heads which are arranged in a strip-shaped spacing manner, the temperature of the split pressure heads at any position is relatively uniform, the influence of temperature difference on the hot pressing effect is reduced, the split pressure heads can adjust the position and spacing left and right to adapt to the production of different FPCAs, and the tensioning vacuum plates on the vacuum table can adsorb the two sides of a large circuit board, so that the production efficiency is improved. And the circuit board is tensioned so as to reduce the warping and hollowing phenomena of the circuit board.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexible-rigid composite boards, and specifically refers to a hot pressing device for camera modules. Background Art

[0002] Installing a camera on a flexible-rigid printed circuit board (hereinafter referred to as FPCA) can meet the requirements of various special application scenarios, and can take into account scenarios with flexibility, light weight, high integration or complex environment adaptability.

[0003] During the assembly process of the camera and the FPCA, the operator needs to first cut a large circuit board into multiple small strip-shaped circuit boards, then paste multiple lenses onto the small circuit boards respectively, and then place the large circuit board with multiple cameras between two fixtures of a hot press. The fixture part has a heating function, and the fixture is driven by a cylinder. After compacting the circuit board for a certain period of time, it can be taken out.

[0004] The current pressing head is an integral heating pressing head. When the pressing head operates, heat accumulates in the middle part of the pressing head, and the temperature difference between the middle area and the edge area of the pressing head is large. The process parameters are inconsistent, resulting in unstable hot pressing effects. Moreover, the warpage degrees of the circuit board are inconsistent under different humidity and temperature conditions, and there are also differences in the flatness of the circuit board during hot pressing. There are warping or hollowing phenomena in some areas. The above problems all affect the hot pressing quality of the camera module. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention provides a hot pressing device for camera modules, which at least partially solves the above problems.

[0006] The technical solution adopted by the present invention is as follows: A hot pressing device for camera modules proposed by the present invention includes a control box. A cylinder is disposed through the upper part of the control box, and a pressing plate is provided at the telescopic end of the cylinder. The pressing plate is slidably disposed in the middle and lower part of the control box.

[0007] Further, a plurality of split pressing heads are provided on the pressing plate. The spacing and position of the split pressing heads can be actively adjusted, and heating pipes are connected to the split pressing heads.

[0008] Further, positioning frames are slidably disposed on both sides of the pressing plate. The split pressing heads are slidably disposed in the positioning frames through sliders. Both sides of the positioning frames are connected with fastening bolts, and the fastening bolts threadedly penetrate through the side walls of the pressing plate.

[0009] Further, a variable pitch shaft is rotatably disposed on the positioning frame. The variable pitch shaft is threadedly connected to the slider, and the variable pitch shaft can adjust the sliders to an equidistant state. The variable pitch shaft is slidably disposed on the side wall of the pressing plate.

[0010] Further, a vacuum table is provided at the bottom of the control box, and vacuum holes are provided on the vacuum table.

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

[0012] Further, a slideway is provided on the side wall of the vacuum table, a sliding shaft is slidably provided in the slideway, the outer end of the sliding shaft is provided on the tensioning vacuum plate, a base is provided at the bottom of the sliding shaft, and a spring is connected between the base and the side wall of the slideway.

[0013] Further, side holes are formed in the side wall of the slideway, a release groove is provided above the side holes, and a retaining post is provided in the area of the side holes located in the release groove.

[0014] Further, a wrench is rotatably provided on the sliding shaft, the size of the wrench is adapted to the side holes, the release groove and the retaining post, the wrench can slide in the side holes, and can rotate and pass through the area between the release groove and the retaining post.

[0015] Further, air channels are provided on both sides of the vacuum table, connecting rods are provided on the side walls of the tensioning vacuum plates, the connecting rods are slidably provided in the air channels, and the tensioning vacuum plates are communicated with the outside through the connecting rods.

[0016] The beneficial effects obtained by the present invention are as follows: The split pressing heads arranged in an interval strip shape can reduce heat accumulation, make the temperature of the split pressing heads more uniform at any position, reduce the influence of temperature difference on the hot pressing effect, and the split pressing heads can adjust the position and spacing left and right to adapt to the production of different FPCAs. The tensioning vacuum plates on the vacuum table can adsorb both sides of the large circuit board and tension the circuit board to reduce the warping and hollowing phenomena of the circuit board. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the hot pressing device of the camera module according to the embodiment of the present invention; Figure 2 It is a position relationship diagram of each split pressing head under the pressing plate; Figure 3 It is a broken view of the state diagram in which the wrench on the vacuum table is locked; Figure 4 It is a broken view of the state diagram in which the wrench on the vacuum table is released; Figure 5 It is a position relationship diagram of the sliding shaft, the spring and the wrench; Figure 6 It is a broken view of the vacuum table.

[0018] Among them, 1. Control box, 2. Cylinder, 3. Pressing plate, 4. Positioning frame, 5. Variable pitch shaft, 6. Fastening bolt, 7. Slide block, 8. Split punch, 9. Heating tube, 10. Vacuum table, 11. Tensioning vacuum plate, 12. Slide shaft, 13. Spring, 14. Connecting rod, 15. Wrench, 16. Base, 17. Air duct, 18. Slideway, 19. Side hole, 20. Stop post, 21. Release groove.

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0022] As Figure 1 and Figure 2 shown, a thermal pressing device for a camera module proposed in an embodiment of the present invention includes a control box 1. A cylinder 2 penetrates through the upper part of the control box 1. A pressing plate 3 is provided at the telescopic end of the cylinder 2. The pressing plate 3 is slidably arranged in the middle and lower part of the control box 1. The lower end of the control box 1 is in an open state to facilitate feeding the FPCA. When the cylinder 2 expands and contracts, it can drive the pressing plate 3 to move up and down to compact the camera adhered to the lower FPCA. An electric control system (not shown in the accompanying drawings) is arranged in the control box 1, which can heat the pressing plate 3 to make the temperature of the compaction operation meet the process requirements.

[0023] In order to reduce the concentration of temperature in the central area of the pressing plate 3 and reduce the temperature difference between the central area and the edge area, a multi-component split punch 8 is provided on the pressing plate 3. The spacing and position of the split punch 8 can be actively adjusted. A heating pipe 9 is connected to the split punch 8. In some embodiments, the electronic control system in the control box 1 heats the split punch 8 through the heating pipe 9, and no longer heats the entire pressing plate 3. The split punch 8 only needs to coincide with the position of the camera on the FPCA to complete the pressing operation, and the gaps between the split punches 8 can dissipate heat evenly, avoiding heat accumulation and making the manufacturing process more stable.

[0024] In order to actively adjust the position and spacing between the split punches 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 punch 8 in the horizontal working direction, positioning frames 4 are slidably provided on both sides of the pressing plate 3. The split punches 8 are slidably arranged in the positioning frames 4 through sliders 7. Both sides of the positioning frames 4 are connected with fastening bolts 6. The fastening bolts 6 thread through the side wall of the pressing plate 3. The positioning frames 4 slide inside the side wall of the pressing plate 3 and move the internal split punches 8 to the required working positions. Then, rotate the fastening bolts 6 on both sides. The moving directions of the fastening bolts 6 on both sides are the same, but when one side of the fastening bolt 6 rotates inward, the other side of the fastening bolt 6 rotates outward, thereby jamming and fixing the positioning frames 4.

[0025] When it is necessary to adjust the spacing of the split punches 8 so that the spacing between the split punches 8 adapts to each piece of FPCA divided from the entire large circuit board, a variable pitch shaft 5 is rotatably provided on the positioning frame 4. The variable pitch shaft 5 will not slide relative to the positioning frame 4. 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 pitches of the threads on both sides gradually increase. The variable pitch shaft 5 can adjust the sliders 7 to an equidistant state, and the distance between the sliders 7 can be adjusted according to the number of turns of rotation of the variable pitch shaft 5, so that the split punches 8 on the sliders 7 are adjusted to the target spacing. The variable pitch shaft 5 is slidably arranged on the side wall of the pressing 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 pressing plate 3. When the variable pitch shaft 5 slides horizontally following the positioning frame 4, the variable pitch shaft 5 can also slide relative to the pressing plate 3.

[0026] As Figures 3 - 6 shown, in order to fix the entire large circuit board during the hot pressing process and prevent slipping, a vacuum table 10 is provided at the bottom of the control box 1. The vacuum table 10 is provided with vacuum holes and positioning strips (not shown in the drawings). The vacuum holes can provide negative pressure to adsorb and fix the circuit board, and the positioning strips play a role in positioning the feeding of the circuit board.

[0027] In order to keep the circuit board fixed on the vacuum table 10 flat and avoid local warping and hollowing, tensioning vacuum plates 11 are slidably arranged on both sides of the vacuum table 10. The tensioning vacuum plates 11 have the functions of tensioning and adsorption. The tensioning vacuum plates 11 can provide a negative pressure adsorption force to adsorb and fix the two side edges of the large circuit board. After the fixing is completed, the tensioning vacuum plates 11 slide outward again to tension the circuit board and make it tend to be flat, and then the vacuum table 10 adsorbs the middle part.

[0028] Sliding channels 18 are arranged on the side walls of the vacuum table 10. A sliding shaft 12 is slidably arranged in the sliding channels 18. The outer end of the sliding shaft 12 is arranged on the tensioning vacuum plate 11. A base 16 is arranged at the bottom of the sliding shaft 12. A spring 13 is connected between the base 16 and the side wall of the sliding channel 18. The spring 13 always pushes the sliding shaft 12 outward, so that the tensioning vacuum plate 11 moves outward to keep the circuit board tensioned.

[0029] Side holes 19 are opened on the side walls of the sliding channels 18. A release groove 21 is arranged above the side holes 19. A retaining post 20 is arranged in the area of the side holes 19 located in the release groove 21.

[0030] A wrench 15 is rotatably arranged on the sliding shaft 12. The size of the wrench 15 is adapted to the side holes 19, the release groove 21 and the retaining post 20. The wrench 15 can slide in the side holes 19 and can rotate and pass through the area between the release groove 21 and the retaining post 20. If the wrench 15 is located inside the retaining post 20, the wrench 15 is blocked by the retaining post 20, and the outward pop-up of the sliding shaft 12 is restricted. If the wrench 15 is rotated upward by 90 degrees into the release groove 21, then slides over the retaining post 20 and then is rotated downward by 90 degrees, the wrench 15 is no longer blocked by the retaining post 20, and the sliding shaft 12 will pop out outward under the action of the spring 13, and the wrench 15 will slide along the side holes 19, so that the tensioning vacuum plate 11 pops out outward. The spring 13 can be actively released or contracted to control the horizontal position of the tensioning vacuum plate 11.

[0031] In order to enable the tensioning vacuum plate 11 to still generate a negative pressure suction force during the sliding process, air channels 17 are arranged on both sides of the vacuum table 10. A connecting rod 14 is arranged on the side wall of the tensioning vacuum plate 11. The connecting rod 14 is slidably arranged in the air channels 17. The tensioning vacuum plate 11 is communicated with the outside through the connecting rod 14.

[0032] Before actual use, first adjust the position parameters of the upper split punch 8 die. Adjust the spacing of each split punch 8 according to the spacing of each FPCA cut on the large circuit board, that is, rotate the variable pitch shaft 5. The slider 7 on the variable pitch shaft 5 moves a corresponding distance, and the spacing between adjacent sliders 7 always remains the same. When the spacing of the sliders 7 is the same as the spacing of the FPCA, stop rotating the variable pitch shaft 5.

[0033] Then, turn the fastening bolt 6 outward, and move the positioning frame 4 left and right so that the split press heads 8 on each slider 7 coincide with the cameras on the FPCA after positioning in sequence. Then, turn the fastening bolt 6 inward to make the fastening bolt 6 tightly press against the positioning frame 4, so that the positioning frame 4 no longer moves left and right.

[0034] After the adjustment of the split press heads 8 is completed, place the entire large circuit board on the vacuum table 10 so that the circuit board fits against the positioning strip on the vacuum table 10. At this time, the vacuum table 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, and the tension vacuum plate 11 works under negative pressure and adsorbs and fixes the circuit board.

[0035] Then, first turn the wrench 15 upward by 90 degrees so that it passes over the stop post 20, and then turn it downward by 90 degrees. The wrench 15 is no longer blocked by the stop post 20. The sliding shaft 12 pops out outward under the action of the spring 13 and drives the tension vacuum plate 11 to pop out outward. The upper wall of the tension vacuum plate 11 adsorbs under the circuit board, thereby driving the circuit board to be tensioned on both sides, keeping the circuit board flat and improving the compaction quality.

[0036] Then, start the cylinder 2. The cylinder 2 moves the pressure plate 3 downward. The pressure plate 3 drives the split press head 8 to move down to the camera on the FPCA. The split press head 8 is energized and heated by the heating tube 9, thereby realizing hot pressing. After the hot pressing time reaches, the cylinder 2 moves upward, and operate the wrench 15 in the reverse direction, and then place the next circuit board.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0038] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they should all 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: A pressing plate (3) is slidably disposed in the control box (1) up and down, and the pressing plate (3) is provided with a plurality of groups of split pressing heads (8) capable of sliding to adjust the spacing and position, and the split pressing heads (8) are connected to heating tubes (9); A vacuum table (10) is fixed to the bottom of the control box (1), and tensioning vacuum plates (11) are slidably provided on both sides of the vacuum table (10). The tensioning vacuum plates (11) are connected to the vacuum table (10) via springs (13). The tensioning vacuum plates (11) can slide outwards and adsorb and fix the camera module.

2. The camera module hot pressing device according to claim 1, characterized in that: The control box (1) is provided with a cylinder (2) penetrating therethrough, and the telescopic end of the cylinder (2) is provided on a pressure plate (3).

3. The camera module hot pressing device according to claim 1, characterized in that: Positioning frames (4) are slidably provided on both sides of the pressure plate (3), and the split pressure head (8) is slidably provided in the positioning frame (4) via a slider (7). Fastening bolts (6) are connected to both sides of the positioning frame (4), and the fastening bolts (6) are threadedly penetrated through the side wall of the pressure plate (3).

4. The camera module hot pressing device according to claim 3, characterized in that: A pitch-changing shaft (5) is rotatably provided on the positioning frame (4), the pitch-changing shaft (5) is threadedly connected to the slider (7), the pitch-changing shaft (5) can adjust the slider (7) to an equidistant state, and the pitch-changing shaft (5) is slidably provided on the side wall of the pressure plate (3).

5. The camera module hot pressing device according to claim 1, characterized in that: The side wall of the vacuum table (10) is provided with a slideway (18), a slide shaft (12) is slidably provided in the slideway (18), the outer end of the slide shaft (12) is provided on the tensioning vacuum plate (11), a base (16) is provided at the bottom of the slide shaft (12), and the spring (13) is connected between the base (16) and the side wall of the slideway (18).

6. The camera module hot pressing device according to claim 5, characterized in that: A side hole (19) is formed on the side wall of the slideway (18), a release groove (21) is provided above the side hole (19), and a blocking column (20) is provided in the area of ​​the side hole (19) located in the release groove (21).

7. The camera module hot pressing device according to claim 6, characterized in that: A wrench (15) is rotatably provided 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 column (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 column (20).

8. The camera module hot pressing device according to claim 1, characterized in that: Air passages (17) are provided on both sides of the vacuum table (10), and connecting rods (14) are provided on the side walls of the tensioning vacuum plate (11). The connecting rods (14) are slidably arranged in the air passages (17), and the tensioning vacuum plate (11) is connected to the outside through the connecting rods (14).

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