Processing tool for composite flexible circuit board for capacitive touch screen

Abstract

The application discloses a processing tool for a composite flexible circuit board for a capacitive touch screen and relates to the technical field of flexible circuit board bonding, which comprises a base, a protective film, a flexible circuit board main body, a fixed vertical plate, a hot air gun and a positioning assembly. A plurality of track grooves are formed in the top of the base, a fixed limiting plate is arranged at one end, a fixed vertical plate is arranged at one side end, the hot air gun is clamped at the top of the fixed vertical plate, the positioning assembly is slidingly connected in the track groove, the protective film and the flexible circuit board main body are clamped at the top of the base through the positioning assembly, and a plurality of iron bars are arranged in the interior of the base close to the top. The positioning assembly comprises a moving block, a moving plate, a first side block, a first sliding column, a first spring and a limiting block. The moving plate is arranged at the bottom of the moving block, the first side block is fixed at one side end of the moving block, the first sliding column is obliquely arranged at one end and slidingly connected in the sliding groove of the first side block through the first spring, the other end of the first sliding column is fixed with the limiting block, and the limiting block is internally provided with a magnet for limiting the positioning assembly.

Description

Technical Field

[0001] This invention relates to the field of flexible circuit board bonding technology, and in particular to a processing tooling for a composite flexible circuit board for capacitive touch screens. Background Technology

[0002] In the manufacturing process of capacitive touch screens, composite flexible circuit boards are a key component, and their processing quality directly affects the performance of the touch screen. Processing fixtures are crucial equipment for ensuring the processing accuracy and efficiency of composite flexible circuit boards. Currently, most existing processing fixtures for composite flexible circuit boards used in capacitive touch screens are designed with relatively fixed dimensions, resulting in poor applicability for composite flexible circuit boards of varying lengths. This is mainly because traditional fixtures often use fixed-size clamping structures, which cannot be flexibly adjusted to accommodate circuit boards of different lengths. For example, some small processing plants may simultaneously undertake orders for processing composite flexible circuit boards for multiple models of capacitive touch screens, with significant differences in circuit board length. When using existing fixtures, for shorter circuit boards, the fixed clamping structure cannot effectively position them, easily causing wobbling during processing and leading to decreased processing accuracy. For longer circuit boards, the size limitations of the fixtures make it impossible to fix them securely, severely impacting production efficiency.

[0003] CN113710002B discloses a processing fixture for a composite flexible circuit board for a capacitive touch screen, including a base frame, a positioning structure mounted on the base frame, a limiting structure connected to the base frame, a pushing structure provided on the base frame, an adjusting structure mounted on the pushing structure, an auxiliary structure connected to the adjusting structure, and a heat dissipation structure mounted on the auxiliary structure. The auxiliary structure and the heat dissipation structure ensure that the protective film is heated evenly, allowing it to adhere better to the board and preventing issues such as edge lifting or delamination. This allows the bonded board to proceed to the next process.

[0004] In actual use, the above-mentioned machining tooling is not suitable for dimensions of varying lengths, and its applicable range is small. Summary of the Invention

[0005] This application provides a processing fixture for a composite flexible circuit board for a capacitive touch screen, which solves the technical problem that the prior art is not suitable for different sizes and has a small applicable range. By using a movable block, it can adapt to different sizes of protective film and achieve the technical effect of quickly and effectively limiting the position of the protective film.

[0006] This application provides a processing fixture for a composite flexible circuit board for a capacitive touch screen, including a base, a protective film, a flexible circuit board body, a fixed plate, a hot air gun, and a positioning component.

[0007] The top of the base has multiple track grooves; a limit plate is fixed to one end of the top of the base.

[0008] The fixed plate is fixed to one side of the top of the base, and the hot air gun is snapped onto the top of the fixed plate.

[0009] The positioning component is slidably connected within the track groove;

[0010] The protective film and the flexible circuit board body are snapped onto the top of the base by multiple positioning components;

[0011] The base has multiple iron bars inside near the top, which are evenly distributed.

[0012] The positioning component includes a movable block, a movable plate, a first side block, a first sliding column, a first spring, and a limiting block;

[0013] The bottom of the movable block is provided with the movable plate; the movable plate is slidably connected in the track groove; one side end of the movable block is fixed with the first side block; one end of the first sliding column passes obliquely through the first side block, the first side block has a sliding groove adapted to the first sliding column, and the first sliding column is slidably connected in the sliding groove of the first side block by the first spring.

[0014] The other end of the first sliding column is fixed with the limiting block; the limiting block is equipped with a magnet, which is used to limit the positioning component.

[0015] Preferably, the movable plate further includes a fixed column; the fixed column is rotatably connected to the top of the movable plate; a movable column is symmetrically fixed near the top of the fixed column; a limiting plate is fixed to the bottom of the movable plate, and the limiting plate is also provided with a sliding groove adapted to the movable column; the movable column is slidably connected to the limiting plate through the sliding groove.

[0016] Preferably, a second side block is fixed to the other end of the movable block; the second side block further includes a second sliding column, a second spring, a positioning column, a connecting column, and a positioning ball; the second side block has a through hole adapted to the second sliding column; the second sliding column is slidably connected to the through hole of the second side block through the second spring; the positioning column is symmetrically fixed to the top of the second sliding column; a pair of L-shaped limiting plates are rotatably connected to the top of the movable block near the second side block, which limit the positioning column; the positioning ball is fixed to the bottom of the second sliding column; the connecting column is symmetrically fixed to the positioning ball and close to the movable block; multiple fixed balls are also fixedly connected to the bottom of the connecting column.

[0017] Preferably, a cooling component is also fixed to the other side of the movable block, near the bottom of the second side block; the connecting column has an inner groove at one end facing the movable block; the connecting column also has a bladder made of silicone rubber and filled with paraffin wax; the cooling component further includes a mounting bracket and a crescent-shaped rotating plate; the mounting bracket has a mounting groove; the two sides of the mounting groove have symmetrical rotating grooves; the two sides of the crescent-shaped rotating plate are symmetrically fixed with rotating columns; the inner cross section of the crescent-shaped rotating plate also has multiple semiconductor cooling chips fixed thereon; the curvature of the outer cross section of the crescent-shaped rotating plate matches the curvature of the mounting groove; the rotating column matches the rotating groove; the crescent-shaped rotating plate is rotatably connected to the mounting groove through the rotating column.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0019] The movable block can adapt to the different sizes of the protective film and achieve a fast and effective positioning effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the base structure of a processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0021] Figure 2 This is a three-dimensional structural schematic diagram of a processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0022] Figure 3 This is a schematic diagram of the moving block structure of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0023] Figure 4 This is a schematic diagram of the iron bar structure of the processing tooling for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0024] Figure 5 This is a schematic diagram of the fixed column structure of a second embodiment of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0025] Figure 6 This is a three-dimensional structural schematic diagram of a second embodiment of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention;

[0026] Figure 7 This is a three-dimensional structural schematic diagram of a third embodiment of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention;

[0027] Figure 8 This is a schematic diagram of the fixed sphere structure in Embodiment 3 of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0028] Figure 9 This is a schematic diagram of the second side block structure of a third embodiment of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention;

[0029] Figure 10 This is a schematic diagram of the cooling component position in Embodiment 4 of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0030] Figure 11 This is a schematic diagram of the capsule structure of a fourth embodiment of the processing tooling for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0031] Figure 12 This is a schematic diagram showing the cooling component disassembled in Embodiment 4 of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0032] Figure 13 This is a diagram showing the state of the capsule containing liquid paraffin in Embodiment 4 of the processing fixture for a composite flexible circuit board for a capacitive touch screen according to the present invention.

[0033] In the picture:

[0034] 100. Base; 101. Track groove; 102. Flexible circuit board body; 103. Protective film; 104. Iron bar; 110. Limiting plate; 120. Fixed upright plate; 130. Hot air gun; 200. Positioning component; 201. Moving block; 202. Moving plate; 203. First side block; 204. First sliding column; 205. First spring; 206. Limiting block; 2061. Magnet; 210. Fixed upright column; 211. Moving column; 212. Limiting plate, 220, second side block, 221, second sliding column, 222, second spring, 223, positioning column, 224, L-shaped limiting plate, 225, positioning ball, 226, connecting column, 2261, inner groove, 227, fixed ball, 228, bladder, 230, cooling assembly, 231, mounting bracket, 2311, mounting groove, 2312, rotating groove, 232, crescent-shaped rotating plate, 233, semiconductor cooling chip, 234, rotating column. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0036] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Example 1: As shown in the figure, the processing fixture for a composite flexible circuit board for a capacitive touch screen of this application includes a base 100, a protective film 103, a flexible circuit board body 102, a fixed plate 120, a hot air gun 130, and a positioning component 200.

[0039] The top of the base 100 has multiple track grooves 101; a limiting plate 110 is fixed to one end of the top of the base 100.

[0040] The fixed plate 120 is fixed to one side of the top of the base 100, and the hot air gun 130 is snapped onto the top of the fixed plate 120.

[0041] The positioning component 200 is slidably connected within the track groove 101;

[0042] The protective film 103 and the flexible circuit board body 102 are snapped onto the top of the base 100 by a plurality of positioning components 200;

[0043] The base 100 has multiple iron bars 104 near the top, which are evenly distributed.

[0044] The positioning component 200 includes a moving block 201, a moving plate 202, a first side block 203, a first sliding column 204, a first spring 205, and a limiting block 206;

[0045] The bottom of the movable block 201 is provided with the movable plate 202; the movable plate 202 is slidably connected in the track groove 101; the first side block 203 is fixed to one side end of the movable block 201; one end of the first sliding column 204 passes obliquely through the first side block 203, the first side block 203 has a sliding groove adapted to the first sliding column 204, and the first sliding column 204 is slidably connected in the sliding groove of the first side block 203 by the first spring 205;

[0046] The other end of the first sliding column 204 is fixed with the limiting block 206; the limiting block 206 is provided with a magnet 2061, which is used to limit the positioning component 200.

[0047] Specific implementation: First, place the flexible circuit board body 102 on top of the base 100, so that one side of the flexible circuit board body 102 contacts the limiting plate 110. Then, pull the first sliding post 204 of the positioning component 200, and then move the positioning component 200 to slightly abut against the edge of the flexible circuit board body 102. After abutting, release the first sliding post 204. The limiting block 206 abuts against the top of the base 100 by the elastic force of the first spring 205. At this time, the magnet 2061 inside the limiting block 206 magnetically attracts the iron bar 104 of the base 100. The positioning component 200 is limited at the top of the base 100 by the limiting block 206. Then, place the protective film 103 on the top of the flexible circuit board body 102. Finally, heat the flexible circuit board body 102 with a hot air gun 130.

[0048] Beneficial effects: The movable block 201 can adapt to the different sizes of the protective film 103 and achieve the technical effect of quickly and effectively limiting the position of the protective film 103.

[0049] Example 2: In order for the movable block 201 to adapt to the protective film 103 with a certain arc edge, the movable block 201 and the movable plate 202 are improved; this application proposes the following technical solution to address the above-mentioned technical problems, specifically:

[0050] like Figure 6 The movable plate 202 shown also includes a fixed column 210;

[0051] The fixed column 210 is rotatably connected to the top of the movable plate 202; the fixed column 210 is symmetrically fixed with movable columns 211 near the top; the bottom of the movable block 201 is fixed with a limiting plate 212, and the limiting plate 212 is also provided with a sliding groove adapted to the movable column 211; the movable column 211 is slidably connected to the limiting plate 212 through the sliding groove.

[0052] Specific implementation: When limiting the flexible circuit board body 102 with curved edges, pull the first sliding post 204 of the positioning component 200 to move the positioning component 200 close to the flexible circuit board body 102 with curved edges. Since the moving post 211 is inside the limiting plate 212, rotating the moving block 201 causes the fixed post 210 to rotate. After rotating until the moving block 201 can contact and slightly abut against the flexible circuit board body 102, release the first sliding post 204. When there is a small distance between the moving block 201 and the flexible circuit board body 102, pull the first sliding post 204 to pull the moving block 201 towards the flexible circuit board body 102 (since the moving block 201 has a sliding groove that matches the moving post 211, and the moving post 211 is slidably connected in the sliding groove), so that the moving block 201 can slightly abut against it, release the first sliding post 204.

[0053] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0054] The rotatable movable block 201 can adapt to the flexible circuit board body 102 with curved edges, and the movable block 201 can extend or retract a small distance to avoid the inability to limit the curved edge of a flexible circuit board body 102 due to insufficient distance of the movable block 201.

[0055] Example 3: Because the moving block 201 only makes point contact with the protective film 103 and the flexible circuit board body 102 when limiting their positions, the hot air gun 130 may cause the protective film 103 to shift upwards or lift up due to the hot air. Therefore, the moving block 201 is improved. This application proposes the following technical solution to address the above-mentioned technical problems:

[0056] like Figure 7 As shown, a second side block 220 is fixed to the other side of the movable block 201; the second side block 220 also includes a second sliding column 221, a second spring 222, a positioning column 223, a connecting column 226, and a positioning ball 225;

[0057] The second side block 220 has a through hole that matches the second sliding column 221; the second sliding column 221 is slidably connected in the through hole of the second side block 220 by the second spring 222; the positioning column 223 is symmetrically fixed to the top of the second sliding column 221; the moving block 201 is rotatably connected to a pair of L-shaped limiting plates 224 near the top of the second side block 220, which limit the positioning column 223;

[0058] The bottom of the second sliding column 221 is fixed with the positioning ball 225; the connecting column 226 is symmetrically fixed on the positioning ball 225 and close to the moving block 201;

[0059] The bottom of the connecting column 226 is also fixedly connected to a plurality of fixed spheres 227.

[0060] Specific implementation: When the moving block 201 abuts against the protective film 103 with arc edge and the flexible circuit board body 102, the positioning post 223 in the initial state is stuck on the L-shaped limiting plate 224. Pull the positioning post 223, and then rotate the L-shaped limiting plate 224. The L-shaped limiting plate 224 no longer abuts against the positioning post 223. Then, slowly move the second sliding post 221 downward until it moves to the fixed ball 227 abutting against the protective film 103 and the flexible circuit board body 102. The second spring 222 can ensure that the second sliding post 221 will not move up and down when the hot air gun 130 heats the protective film 103.

[0061] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0062] By using the fixed ball 227 at the bottom of the connecting column 226 to hold the protective film 103 and the flexible circuit board body 102 together, it is prevented that when the hot air gun 130 heats the edge of the protective film 103, the edge of the protective film 103 with arc edges may shift upward or lift up due to the hot air.

[0063] Example 4: To further ensure that the edge of the protective film 103 with curved edges can effectively adhere to the flexible circuit board body 102, the connecting post 226 is improved; this application proposes the following technical solution to address the above-mentioned technical problems, specifically:

[0064] As shown in the figure, a cooling component 230 is also fixed to the other side of the movable block 201, and is close to the bottom of the second side block 220; the connecting post 226 has an inner groove 2261 at one end facing the movable block 201; the connecting post 226 is also fixed with a bladder 228, the bladder 228 is made of silicone rubber, and the bladder 228 is filled with paraffin wax;

[0065] The cooling assembly 230 also includes a mounting bracket 231 and a crescent-shaped rotating plate 232;

[0066] The mounting bracket 231 has a mounting groove 2311; the two sides of the mounting groove 2311 have symmetrical rotating grooves 2312.

[0067] The crescent-shaped rotating plate 232 has rotating columns 234 symmetrically fixed at both ends; the inner section of the crescent-shaped rotating plate 232 also has multiple semiconductor cooling chips 233 fixed thereon.

[0068] The curvature of the outer section of the crescent-shaped rotating plate 232 is adapted to the curvature of the mounting groove 2311; the rotating column 234 is adapted to the rotating groove 2312;

[0069] The crescent-shaped rotating plate 232 is rotatably connected to the mounting groove 2311 via the rotating column 234.

[0070] Specific implementation: First, after the movable block 201 is pressed against the protective film 103 and the flexible circuit board body 102, the positioning column 223 is pulled to move the second sliding column 221 upward, so that the capsule 228 does not contact the cooling component 230. At this time, the paraffin inside the capsule 228 is solid and needs to be heated with a hot air gun 130 to turn it into liquid paraffin. Then, the L-shaped limiting plate 224 is rotated to slowly move the second sliding column 221 downward until the fixed ball 227 presses against the flexible circuit board body 102 and the protective film 103. At this time, the liquid paraffin will drive the capsule 228 to cover the surface of the protective film 103. At the same time, it will also fill the gap at the edges of the movable block 201 and the flexible circuit board body 102 and the protective film 103 (i.e., the two sides of the movable block 201 that are in point contact with the flexible circuit board body 102 and the protective film 103), so that the protective film 103 is fully hydrated. 3. It adheres more tightly to the flexible circuit board body 102, and plays a certain role in preventing edge lifting during the subsequent heating process of the protective film 103. After the protective film 103 is adhered to the flexible circuit board (when all work is completed), the semiconductor cooling chip 233 is activated, the moving column 211 is raised, and the L-shaped limiting plate 224 is rotated so that the positioning column 223 is stuck on the L-shaped limiting plate 224. During this process, the paraffin in the capsule 228 is in liquid state. When it passes through the cooling component 230, it will drive the crescent-shaped rotating plate 232 to rotate. After the tooth-shaped rotating plate rotates once, it returns to its original position. After the capsule 228 passes through the cooling component 230, the liquid paraffin drives the capsule 228 to move towards the inner section of the crescent-shaped rotating plate 232 and contact the semiconductor cooling chip 233, so that the liquid paraffin becomes solid paraffin. After the liquid paraffin becomes solid paraffin, the semiconductor cooling chip 233 is turned off.

[0071] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0072] The liquid paraffin will cause the capsule 228 to cover the surface of the protective film 103. At the same time, it will fill the gap between the moving block 201 and the edge of the flexible circuit board body 102 with arc edge and the protective film 103, ensuring that the edge of the protective film 103 with arc edge can effectively adhere to the upper flexible circuit board body 102.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A processing fixture for a composite flexible circuit board for a capacitive touchscreen, characterized in that, The device includes a base (100), a protective film (103), a flexible circuit board body (102), a fixed upright plate (120), a hot air gun (130), and a positioning component (200). The top of the base (100) has multiple track grooves (101). A limit plate (110) is fixed to one end of the top of the base (100). The fixed upright plate (120) is fixed to one side of the top of the base (100), and the hot air gun (130) is snapped onto the top of the fixed upright plate (120). The positioning component (200) is slidably connected within the track grooves (101). The protective film (103) and the flexible circuit board body (102) are snapped onto the top of the base (100) by multiple positioning components (200). Multiple iron bars (104) are provided inside the base (100) near the top, and are evenly distributed. The positioning component (200) includes a movable block (201), a movable plate (202), a first side block (203), a first sliding post (204), a first spring (205), and a limiting block (206); the movable plate (202) is provided at the bottom of the movable block (201); the movable plate (202) is slidably connected in the track groove (101); the first side block (203) is fixed to one side end of the movable block (201); one end of the first sliding post (204) obliquely passes through the first side block (203), the first side block (203) has a sliding groove adapted to the first sliding post (204), and the first sliding post (204) is slidably connected in the sliding groove of the first side block (203) through the first spring (205); The other end of the first sliding column (204) is fixed with the limiting block (206); the limiting block (206) is provided with a magnet (2061), which is used to limit the positioning component (200).

2. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 1, characterized in that, The movable plate (202) also includes a fixed column (210); the fixed column (210) is rotatably connected to the top of the movable plate (202); the fixed column (210) is symmetrically fixed with a movable column (211) near the top; the bottom of the movable block (201) is fixed with a limiting plate (212), and the limiting plate (212) is also provided with a sliding groove adapted to the movable column (211); the movable column (211) is slidably connected to the limiting plate (212) through the sliding groove.

3. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 2, characterized in that, The other end of the movable block (201) is fixed with a second side block (220); the second side block (220) also includes a second sliding column (221), a second spring (222), a positioning column (223), a connecting column (226), and a positioning ball (225); the second side block (220) has a through hole adapted to the second sliding column (221); the second sliding column (221) is slidably connected in the through hole of the second side block (220) through the second spring (222); the positioning column (223) is symmetrically fixed at the top of the second sliding column (221); a pair of L-shaped limiting plates (224) are rotatably connected to the top of the movable block (201) near the second side block (220), which limit the positioning column (223).

4. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 3, characterized in that, The bottom of the second sliding column (221) is fixed with the positioning ball (225); the connecting column (226) is symmetrically fixed on the positioning ball (225) and close to the moving block (201).

5. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 4, characterized in that, The bottom of the connecting column (226) is also fixedly connected to a plurality of fixed spheres (227).

6. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 5, characterized in that, A cooling component (230) is also fixed to the other end of the movable block (201) and is close to the bottom of the second side block (220); the connecting post (226) has an inner groove (2261) at one end facing the movable block (201); the connecting post (226) is also fixed with a bladder (228), the bladder (228) is made of silicone rubber and is filled with paraffin.

7. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 6, characterized in that, The cooling assembly (230) also includes a mounting bracket (231) and a crescent-shaped rotating plate (232); the mounting bracket (231) has a mounting groove (2311); the mounting groove (2311) has symmetrical rotating grooves (2312) on both sides; the crescent-shaped rotating plate (232) has symmetrical rotating columns (234) fixed on both sides; the inner cross section of the crescent-shaped rotating plate (232) also has a plurality of semiconductor cooling chips (233) fixed thereon.

8. The processing fixture for a composite flexible circuit board for a capacitive touchscreen as described in claim 7, characterized in that, The curvature of the outer section of the crescent-shaped rotating plate (232) is adapted to the curvature of the mounting groove (2311); the rotating column (234) is adapted to the rotating groove (2312); the crescent-shaped rotating plate (232) is rotatably connected to the mounting groove (2311) through the rotating column (234).

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