Dry film for flexible circuit board

Abstract

The utility model discloses a dry film used for a flexible circuit board, comprising a dry film layer, an unreeling mechanism and a carding mechanism, the top end of the dry film layer is attached with a PE layer, the bottom end of the dry film layer is attached with a PET layer, the inner wall of the dry film layer is wound with a mounting block, the unreeling mechanism is arranged on the inner wall of the mounting block, and the carding mechanism is arranged on the inner wall of the mounting block. The carding mechanism is mounted on the outer wall of the mounting block and comprises a mounting frame, a fixing rod and a carding roller. According to the dry film for the flexible circuit board, through the arrangement of the carding mechanism, when the flexible circuit board is covered with the dry film, the dry film is conveniently released through equipment, the released dry film is pressed and carded through a carding roller in the carding mechanism, the dry film can be prevented from wrinkling in the discharging process, and the quality of the flexible circuit board is improved. Therefore, the flatness of the dry film covering the surface of the flexible circuit board is influenced, the product appearance is influenced, and meanwhile, the mounting frame and the carding roller can be conveniently disassembled and assembled through the fixing rods according to requirements.

Description

Technical Field

[0001] The utility model relates to the technical field related to flexible circuit boards, in particular to a dry film used for flexible circuit boards. Background Art

[0002] Flexible circuit boards, also known as "soft boards", are printed circuits made of flexible insulating substrates. Flexible circuits provide excellent electrical properties, can meet the design needs of smaller and higher density installations, and also help reduce assembly processes and enhance reliability. Flexible circuit boards are the only solution to meet the miniaturization and mobility requirements of electronic products. They can be bent, wound, and folded freely, and can withstand millions of dynamic bendings without damaging the wires. They can be arranged arbitrarily according to spatial layout requirements, and can be moved and stretched arbitrarily in three-dimensional space, thereby achieving the integration of component assembly and wire connection. Flexible circuit boards can greatly reduce the size and weight of electronic products, and are suitable for the development of electronic products towards high density, miniaturization, and high reliability. The surface of the flexible circuit board is covered with a dry film to achieve the function of blocking electroplating and etching. Therefore, a dry film for flexible circuit boards is urgently needed.

[0003] The dry film currently used for flexible circuit boards has no combing measures when the dry film is released, which easily leads to wrinkles in the dry film during feeding, thereby affecting the coverage flatness of the dry film. Utility Model Content

[0004] The purpose of the utility model is to provide a dry film for a flexible circuit board, so as to solve the problem that the dry film currently used for a flexible circuit board mentioned in the above background technology has no combing measures when the dry film is released, which easily leads to wrinkles in the dry film during feeding, thereby affecting the covering flatness of the dry film.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dry film for a flexible circuit board, comprising a dry film layer, a reeling mechanism and a combing mechanism, the top of the dry film layer is laminated with a PE layer, and the bottom of the dry film layer is laminated with a PET layer, the inner wall of the dry film layer is rolled up with a mounting block, the reeling mechanism is arranged on the inner wall of the mounting block, the combing mechanism is installed on the outer wall of the mounting block, the combing mechanism comprises a mounting frame, a fixing rod and a combing roller, the mounting frames are both installed at both ends of the outer wall of the mounting block, the inner wall of the mounting frame is installed with a fixing rod, and the front end of the mounting frame is provided with a combing roller.

[0006] Preferably, the bottom end of the PE layer is closely attached to the top end of the dry film layer, and the size of the PE layer is consistent with the size of the dry film layer.

[0007] Preferably, the top end of the PET layer is tightly fitted with the bottom end of the dry film layer, and the size of the PET layer is consistent with the size of the dry film layer.

[0008] Preferably, the unwinding mechanism comprises a driven shaft, a slot and a brake shaft, the driven shaft is arranged on the inner wall of the mounting block, the inner wall of the driven shaft is provided with a slot, and the brake shaft is inserted through the inner wall of the slot.

[0009] Preferably, the outer wall size of the brake shaft matches the inner wall size of the slot, and the brake shaft is a cross-shaped structure.

[0010] Preferably, the mounting bracket is threadedly connected to the unwinding drum via a fixing rod, and the outer wall of the fixing rod and the inner wall of the unwinding drum are both threadedly arranged.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The dry film for the flexible circuit board is provided with a combing mechanism, so that when the flexible circuit board is covered with the dry film, the dry film is released through the device, and the released dry film is pressed and combed by the combing roller in the combing mechanism, which can avoid the dry film from wrinkling during the discharge process, thereby affecting the flatness of the dry film covering the surface of the flexible circuit board and affecting the appearance of the product. At the same time, the mounting frame and the combing roller can be conveniently disassembled and assembled through the fixing rod according to needs;

[0013] 2. The dry film used for the flexible circuit board is provided with an unwinding mechanism, so that when in use, the brake shaft in the unwinding mechanism is inserted into the slot provided on the inner wall of the driven shaft, and the brake shaft is driven by the device to drive the driven shaft and the dry film to rotate, thereby releasing the dry film wound on the driven shaft, which is convenient for installation with the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front cross-sectional view of the utility model;

[0015] Figure 2 It is a top view of the parts of the utility model;

[0016] Figure 3 For this utility model Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0017] In the figure: 1, dry film layer; 2, PE layer; 3, PET layer; 4, mounting block; 5, unwinding mechanism; 501, driven shaft; 502, slot; 503, brake shaft; 6, combing mechanism; 601, mounting frame; 602, fixing rod; 603, combing roller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides a technical solution: a dry film for a flexible circuit board, comprising a dry film layer 1, a reeling mechanism 5 and a combing mechanism 6, the top of the dry film layer 1 is attached with a PE layer 2, the bottom of the PE layer 2 is tightly attached to the top of the dry film layer 1, and the size of the PE layer 2 is consistent with the size of the dry film layer 1, and the bottom of the dry film layer 1 is attached with a PET layer 3, the top of the PET layer 3 is tightly attached to the bottom of the dry film layer 1, and the size of the PET layer 3 is consistent with the size of the dry film layer 1, the inner wall of the dry film layer 1 is rolled up with a mounting block 4, the reeling mechanism 5 is arranged on the inner wall of the mounting block 4, and the reeling mechanism 5 includes a driven shaft 501, a slot 502 and The brake shaft 503 and the driven shaft 501 are arranged on the inner wall of the mounting block 4, a slot 502 is provided on the inner wall of the driven shaft 501, and the brake shaft 503 is inserted into the inner wall of the slot 502, the outer wall size of the brake shaft 503 is consistent with the inner wall size of the slot 502, and the brake shaft 503 is a cross-shaped structure, through the unwinding mechanism 5, it is convenient to insert the brake shaft 503 in the unwinding mechanism 5 into the slot 502 provided on the inner wall of the driven shaft 501 when in use, and drive the brake shaft 503 through the equipment to drive the driven shaft 501 and the dry film to rotate, so as to release the dry film wound on the driven shaft 501, so as to facilitate installation with the equipment.

[0020] The combing mechanism 6 is installed on the outer wall of the mounting block 4. The combing mechanism 6 includes a mounting frame 601, a fixing rod 602 and a combing roller 603. The mounting frames 601 are all installed at both ends of the outer wall of the mounting block 4. The fixing rod 602 is installed on the inner wall of the mounting frame 601, and a combing roller 603 is arranged at the front end of the mounting frame 601. The mounting frame 601 is threadedly connected with the unwinding drum 401 through the fixing rod 602, and the outer wall of the fixing rod 602 and the inner wall of the unwinding drum 401 are both threadedly arranged. Through the arranged combing mechanism 6, it is convenient to release the dry film through the equipment when the flexible circuit board is covered with a dry film. The released dry film is pressed and combed by the combing roller 603 in the combing mechanism 6, which can avoid wrinkles in the dry film during the discharge process, thereby affecting the flatness of the dry film covering the surface of the flexible circuit board and affecting the appearance of the product. At the same time, the mounting frame 601 and the combing roller 603 can be conveniently disassembled and assembled through the fixing rod 602 according to needs.

[0021] Working principle: During installation, first insert the brake shaft 503 in the unwinding mechanism 5 into the slot 502 provided on the inner wall of the driven shaft 501, and then install and connect the brake shaft 503 with the equipment, and drive the brake shaft 503 through the equipment to drive the driven shaft 501 and the dry film to rotate, so as to release the dry film wound on the driven shaft 501, so as to facilitate installation with the equipment. When the flexible circuit board is covered with dry film, the dry film is released through the equipment, and the released dry film is pressed and combed by the combing roller 603 in the combing mechanism 6, so as to avoid wrinkles of the dry film during the discharge process, thereby affecting the flatness of the dry film covering the surface of the flexible circuit board and affecting the appearance of the product. At the same time, the mounting frame 601 and the combing roller 603 can be conveniently disassembled and assembled through the fixing rod 602 according to needs. In addition, the dry film may become brittle due to the volatilization of the solvent during storage, and the PE layer 2 and the PET layer 3 bonded to the outer wall of the dry film layer 1 can protect the dry film layer 1, thus completing an operation process of dry film for flexible circuit boards.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry film for a flexible circuit board, characterized in that: The invention comprises a dry film layer (1), a reeling mechanism (5) and a combing mechanism (6); the top of the dry film layer (1) is bonded with a PE layer (2), and the bottom of the dry film layer (1) is bonded with a PET layer (3); the inner wall of the dry film layer (1) is rolled up with a mounting block (4); the reeling mechanism (5) is arranged on the inner wall of the mounting block (4); the combing mechanism (6) is mounted on the outer wall of the mounting block (4); the combing mechanism (6) comprises a mounting frame (601), a fixing rod (602) and a combing roller (603); the mounting frame (601) is mounted at both ends of the outer wall of the mounting block (4); the inner wall of the mounting frame (601) is mounted with a fixing rod (602), and the front end of the mounting frame (601) is provided with a combing roller (603).

2. A dry film for a flexible circuit board according to claim 1, characterized in that: The bottom end of the PE layer (2) is tightly fitted to the top end of the dry film layer (1), and the size of the PE layer (2) is consistent with the size of the dry film layer (1).

3. The dry film for a flexible circuit board according to claim 1, characterized in that: The top end of the PET layer (3) is tightly attached to the bottom end of the dry film layer (1), and the size of the PET layer (3) is consistent with the size of the dry film layer (1).

4. The dry film for a flexible circuit board according to claim 1, characterized in that: The unwinding mechanism (5) comprises a driven shaft (501), a slot (502) and a brake shaft (503); the driven shaft (501) is arranged on the inner wall of the mounting block (4); the slot (502) is provided on the inner wall of the driven shaft (501); and the brake shaft (503) is inserted through the inner wall of the slot (502).

5. The dry film for a flexible circuit board according to claim 4, characterized in that: The outer wall size of the brake shaft (503) matches the inner wall size of the slot (502), and the brake shaft (503) is a cross-shaped structure.

6. The dry film for a flexible circuit board according to claim 1, characterized in that: The mounting frame (601) is threadedly connected to the unwinding drum (401) via a fixing rod (602), and the outer wall of the fixing rod (602) and the inner wall of the unwinding drum (401) are both threadedly arranged.

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