CN218941427U - Structure for avoiding bad bubbles of FPC - Google Patents

Abstract

The utility model discloses a structure for avoiding bad bubbles of an FPC (flexible printed circuit), which is applied to the FPC and comprises an FPC board, wherein a reinforcing plate is connected to the side wall of the FPC board; the reinforcing plate comprises a limiting frame, wherein the limiting frame is attached to the FPC board, and steel sheets are clamped on the inner side of the limiting frame. When the reinforcing plate is mounted and attached, the cover film is adhered on the FPC board, the limiting frame of the reinforcing plate is adhered on the cover film, the steel sheet is clamped at the inner side of the limiting frame in a limiting mode, the grid pad is arranged on the side wall of one side of the steel sheet, and when the FPC is subjected to post-treatment after the reinforcing plate is mounted, the phenomenon that the FPC is poor in air bubble due to processing is avoided through the arrangement of the grid pad on the steel sheet and the arrangement of the cover film adhered on the limiting frame; and through the spacing frame of outside block at the steel sheet, when guaranteeing steel sheet installation stability, can provide the protection for the reinforcement steel sheet through spacing frame, and through the operation piece that sets up on the spacing frame for it is more convenient when later stage needs to dismantle the reinforcement steel sheet.

Description

Structure for avoiding bad bubbles of FPC

Technical Field

The utility model relates to the technical field of FPC, in particular to a structure for avoiding bad bubbles of FPC.

Background

The flexible printed circuit board is a flexible printed circuit board which is made of polyimide or polyester film as a base material and has high reliability and excellent performance. The flexible printed circuit board or FPC for short has the characteristics of high wiring density, light weight and thin thickness, and is mainly used for a plurality of products such as mobile phones, notebook computers, PDAs, digital cameras, LCM and the like. The FPC board with excellent quality must be manufactured by a complete and reasonable production process, and each process must be strictly executed from pretreatment before production to final shipment. In the production process, in order to prevent the problems of low yield caused by excessive open and short circuits or the problems of scrapping and material supplementing of the FPC board caused by the problems of drilling, calendaring, cutting and other processes, and evaluate how to select materials to achieve the best effect of the flexible circuit board used by customers. Pre-partum pretreatment is particularly important. However, in the actual operation process, aiming at the early-stage proofing of the FPC, after the blank passes through the furnace in the SMT stage, the situation that 5pcs in the FPC of 10pcs have bubbles is found, the defect occurs at the reinforcing part of the connector steel sheet, and the reinforcing plate is also called a reinforcing plate, a supporting plate, a reinforcing plate and a reinforcing rib, and is mainly used in buildings, petroleum pipelines, working equipment, electronic products and the like. Is widely used in Flexible Printed Circuits (FPC) in electronic products. The flexibility of flexible circuit board is mainly solved to the stiffening plate, improves the intensity of grafting position, makes things convenient for the whole equipment of product, discovers through later test that FPC appears bubbling when bad condition, and the steel sheet reinforcement conducting resin of connector department directly contacts with the copper sheet, consequently when the stiffening plate leads to FPC to produce bad phenomenon such as bubble, need carry out improvement processing to it, and generally attached stiffening plate on FPC intensity is not high, drops easily.

As disclosed in chinese patent (CN 215935163U), the stiffening plate body comprises an insulating layer, a heat-resistant layer, a reinforcing layer and a connecting layer, the insulating layer is in a U-shaped structure, one side of the inner wall of the insulating layer is fixedly connected with the heat-resistant layer, one side of the inner wall of the insulating layer, which is far away from the heat-resistant layer, is fixedly connected with the reinforcing layer, the connecting layer is filled between the heat-resistant layer and the reinforcing layer, an adhesive is seamlessly adhered to the bottom of one side of the insulating layer, and an anti-skid slot is formed in the top of one side of the insulating layer, which is far away from the adhesive, and the beneficial effects achieved by the utility model are that: the utility model has compact structure and strong practicability, the whole stiffening plate body is protected better through the insulating layer with the U-shaped structure, the electrical insulation property and the folding resistance of the stiffening plate body are increased, the stiffening plate body and the FPC board are bonded through the bonding glue which is arranged in advance, and the stiffening plate body and the FPC board are molded at one time, so that only one bonding tolerance is realized, the precision requirement can be ensured, meanwhile, the time is saved when staff operates, and the efficiency is improved.

However, when the present inventors embodied this device, the following drawbacks were found to exist: this scheme is through add insulating layer and bonding glue in the bottom surface of stiffening plate, has strengthened the stability of stiffening plate installation, but when the stiffening plate is dismantled to the later stage of needs, because the whole adhesion of medial surface of stiffening plate has the adhesion to glue, it is inconvenient to dismantle, and damages FPC easily when dismantling, consequently needs a stiffening plate installation stable, convenient to detach, avoids producing bad FPC.

Disclosure of Invention

Based on this, it is necessary to provide a structure for avoiding the bad bubble of FPC to the above-mentioned technical problem, when installing the stiffening plate on FPC, through the outside block limit frame at the stiffening plate, carry out the adhesion with the FPC board through the tectorial membrane with the limit frame, avoid the limit frame of metal material to directly contact with FPC and lead to the bad condition such as bubble when FPC aftertreatment, and limit the steel sheet of reinforcement through the limit frame of adhesion, when making steel sheet and FPC stable in connection, can protect the steel sheet of reinforcement through the limit frame, and can conveniently dismantle the limit frame through the operation piece that sets up on the limit frame, avoid the mode of conventional dismantlement stiffening plate to lead to the impaired condition of FPC.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a structure for avoiding bad bubbles of FPC is applied to FPC, and comprises FPC board, wherein the side wall of the FPC board is connected with reinforcing plate; the reinforcing plate comprises a limiting frame, wherein the limiting frame is attached to the FPC board, and steel sheets are clamped on the inner side of the limiting frame.

Through above-mentioned technical scheme, when installing FPC with the reinforcement steel sheet, in order to prevent when leading to the post-processing FPC because of the direct contact of steel sheet with the copper sheet, the phenomenon that bubble appears in FPC discovers through the practical experiment back, through set up the net pad on the steel sheet, make through the net design and pass through conductive adhesive and attach the back, can not lead to FPC to appear bubble bad phenomenon, and also can avoid FPC later stage to appear bubble bad phenomenon through adhesion tectorial membrane on the steel sheet, this scheme is through seting up the spacing frame of steel sheet outside block of net pad, set up membrane groove and tectorial membrane adhesion on spacing frame, when avoiding FPC processing to appear bubble bad after the installation stiffening plate, through the spacing effect of protection of spacing frame to the steel sheet, improve the protective capability of stiffening plate, make the stiffening plate be convenient for dismouting, improve the practicality.

In a preferred embodiment of the structure for avoiding defective air bubbles in an FPC according to the present utility model, the FPC board is provided with a conductive groove, and the reinforcing plate is attached to an inner side of the conductive groove.

As a preferable implementation mode of the structure for avoiding bad bubbles of the FPC, the inner side of the conductive groove is adhered with a covering film, and one side of the limiting frame is adhered on the covering film.

As a preferred implementation mode of the structure for avoiding bad bubbles of the FPC, the limiting frame comprises an outer frame, an operation piece is fixedly arranged on the inner wall of the outer frame, and one side wall of the outer frame is adhered to the covering film.

As a preferred implementation mode of the structure for avoiding bad bubbles of the FPC, provided by the utility model, a film groove is formed in one side wall of the outer frame, the covering film is adhered to the inner side of the film groove, a limit groove is formed in the inner wall of the outer frame, and the limit groove is clamped with the outer wall of the steel sheet.

As a preferable implementation mode of the structure for avoiding bad bubbles of the FPC, the operation piece comprises a vertical poking piece and a horizontal poking piece, and the vertical poking piece and the horizontal poking piece are positioned on the outer side of the steel sheet.

As a preferred implementation mode of the structure for avoiding bad bubbles of the FPC, the vertical poking sheets and the horizontal poking sheets are the same in structure and are made of metal materials.

In a preferred embodiment of the structure for avoiding defective air bubbles in FPC according to the present utility model, the outer frame is made of metal.

As a preferred implementation mode of the structure for avoiding bad bubbles of the FPC, provided by the utility model, a grid pad is fixedly arranged on one side wall of the steel sheet, a limit strip is fixedly arranged on the other side wall of the steel sheet, and the limit strip is correspondingly clamped with the limit groove.

In a preferred embodiment of the structure for avoiding defective air bubbles in FPC according to the present utility model, the limit bar is made of rubber.

Compared with the prior art, the utility model has the following beneficial effects:

when the reinforcing plate is mounted and attached, the conductive groove is formed in the FPC board, the cover film is adhered to the inner side of the conductive groove, the limiting frame of the reinforcing plate is adhered to the cover film, the steel sheet is clamped at the inner side of the limiting frame in a limiting mode, the grid pad is formed on one side wall of the steel sheet, and after the reinforcing plate is mounted, the FPC is subjected to post-treatment, and the phenomenon that the FPC is bad due to air bubbles in processing is avoided through the arrangement of the grid pad on the steel sheet and the arrangement of the cover film adhered to the limiting frame;

and through the spacing frame of outside block at the steel sheet, make spacing frame spacing to the steel sheet through the spacing frame of adhesion, when guaranteeing steel sheet installation stability, can provide the protection for the reinforcement steel sheet through spacing frame, and through the operation piece that sets up on the spacing frame for it is more convenient to operate when dismantling the reinforcement steel sheet to need in later stage.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure provided by the present utility model;

FIG. 2 is a perspective cross-sectional view of the present utility model;

fig. 3 is a schematic perspective view of the FPC board according to the present utility model;

FIG. 4 is a perspective cross-sectional view of a stop frame of the present utility model;

FIG. 5 is an enlarged schematic view of FIG. 4A in accordance with the present utility model;

fig. 6 is a schematic perspective view of a steel sheet according to the present utility model.

The labels in the figures are illustrated below:

1. an FPC board; 11. a conductive groove; 111. a cover film;

2. a reinforcing plate;

21. a limit frame; 211. an outer frame; 2111. a membrane tank; 2112. a limit groove; 212. an operation piece; 2121. a vertical plectrum; 2122. a transverse plectrum;

22. a steel sheet; 221. a grid pad; 222. and a limit strip.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As in the background art, when the reinforcing plate is mounted on the FPC, the mounting stability of the reinforcing plate is generally insufficient, and after mounting, the poor phenomenon of bubbles occurs when the FPC is post-processed due to direct contact of the conductive adhesive with the copper sheet.

In order to solve the technical problem, the utility model provides a structure for avoiding bad bubbles of an FPC, which is applied to the FPC.

Specifically, please refer to fig. 1-2, a structure for avoiding bad bubbles of FPC is applied to FPC, which comprises an FPC board 1, wherein a reinforcing plate 2 is connected to the side wall of the FPC board 1, and the strength of the FPC plugging part can be enhanced through the reinforcing plate 2; the stiffening plate 2 includes spacing frame 21, spacing frame 21 is attached on FPC board 1, through seting up membrane groove 2111 on the lateral wall of spacing frame 21, adhesion tectorial membrane 111 on FPC board 1, the adhesion through spacing frame 21 and tectorial membrane 111 is fixed spacing frame 21, through addding tectorial membrane 111, avoid FPC board 1 when later stage processing because of the direct contact with the copper sheet of conductive adhesive of stiffening plate 2, lead to FPC board 1 to appear bubble bad condition, the inboard block of spacing frame 21 is equipped with steel sheet 22, through set up net pad 221 on the lateral wall of steel sheet 22, avoid also that bubble bad condition appears in the processing of later stage FPC board 1.

According to the structure for avoiding bad bubbles of the FPC, when the reinforcing plate 2 is mounted on the FPC board 1, the reinforcing steel sheet 22 is clamped through the limiting frame 21, the reinforcing steel sheet is adhered to one side of the limiting frame 21 through the covering film 111 during mounting, and when the FPC board 1 is processed in a later period, the situation that the bad bubbles are caused by direct contact of conductive adhesive used for adhering the reinforcing plate 2 with the FPC copper sheet is avoided through the arrangement of the covering film 111 and the grid pad 221 on the steel sheet 22.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Example 1

Referring to fig. 1, 2 and 3, a structure for avoiding bad bubbles of FPC is specifically disclosed, and is applied to FPC, and comprises an FPC board 1, wherein a reinforcing plate 2 is connected to a side wall of the FPC board 1; the reinforcing plate 2 comprises a limit frame 21, the limit frame 21 is attached to the FPC board 1, and a steel sheet 22 is clamped on the inner side of the limit frame 21; the FPC board 1 is provided with a conductive groove 11, and the reinforcing plate 2 is attached to the inner side of the conductive groove 11; the inner side of the conductive groove 11 is adhered with a cover film 111, and one side of the limit frame 21 is adhered on the cover film 111; the limit frame 21 comprises an outer frame 211, an operation piece 212 is fixedly arranged on the inner wall of the outer frame 211, and one side wall of the outer frame 211 is adhered to the cover film 111; a film groove 2111 is formed in one side wall of the outer frame 211, and the covering film 111 is adhered to the inner side of the film groove 2111; when carrying out the installation of stiffening plate 2, through adhesion tectorial membrane 111 on FPC board 1, through the adhesion block of tectorial membrane 111 with spacing frame 21 for firm through the adhesion of spacing frame 21 and tectorial membrane 111 when installing stiffening plate 2, and through the setting of tectorial membrane 111, avoid spacing frame 21 to lead to the bad condition of bubble to appear in FPC board 1 because of direct contact with the copper sheet when being connected with FPC board 1

Example 2

Referring to fig. 2 and 6, specifically, a grid pad 221 is fixedly arranged on a side wall of one side of the steel sheet 22, a limit bar 222 is fixedly arranged on a side wall of the other side of the steel sheet 22, and the limit bar 222 is correspondingly clamped with a limit groove 2112; the limiting strip 222 is made of rubber, and the grid pad 221 is arranged on the reinforcing steel sheet 22, so that the situation that bubbles are bad in the later processing of the FPC board 1 due to contact of conductive adhesive and copper sheets when the FPC board 1 is adhered is avoided.

Example 3

Referring to fig. 4 and 5, specifically, a limit groove 2112 is formed on the inner wall of the outer frame 211, and the limit groove 2112 is engaged with the outer wall of the steel sheet 22; the operation piece 212 comprises a vertical pulling piece 2121 and a horizontal pulling piece 2122, wherein the vertical pulling piece 2121 and the horizontal pulling piece 2122 are positioned on the outer side of the steel piece 22; the vertical poking piece 2121 and the horizontal poking piece 2122 have the same structure and are made of metal materials; the frame 211 is the metal material, when carrying out spacing stability for reinforcement steel sheet 22 through spacing frame 21, can provide the protection for reinforcement steel sheet 22 through spacing frame 21, and when the steel sheet 22 need be dismantled to the later stage, through the operation piece 212 that sets up on spacing frame 21, accessible operation piece 212 pulls spacing frame 21 to the outside to conveniently borrow the power and take off spacing frame 21, thereby conveniently take off steel sheet 22, avoid the mode of conventional adhesion to have no department to borrow the power, make the condition of damaging FPC board 1 easily when dismantling stiffening plate 22.

The use process of the structure for avoiding bad bubbles of the FPC provided by the utility model is as follows: when installing stiffening plate 2 on FPC board 1, in order to avoid when later stage processing FPC board 1, the circumstances that the bubble is bad appears in FPC board 1 is directly led to because of the conducting resin of stiffening plate 2 contacts with the copper sheet of FPC board 1 easily, this scheme adhesion tectorial membrane 111 on FPC board 1, it is fixed to carry out the adhesion through the limiting frame 21 of tectorial membrane 111 and stiffening plate 2, through set up net pad 221 on spacing frame 21 inboard steel sheet 22, thereby avoid stiffening plate 2 direct and copper sheet contact to lead to FPC board 1 later stage processing to appear bubble bad condition, and can protect stiffening steel sheet 22 through spacing frame 21, and when making steel sheet 22 installation stable through spacing frame 21, can conveniently dismantle stiffening plate 2 through the operation piece 212 of setting, improve the practicality.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (10)

1. The structure for avoiding bad bubbles of the FPC is applied to the FPC and is characterized by comprising an FPC board (1), wherein a reinforcing plate (2) is connected to the side wall of the FPC board (1);

the reinforcing plate (2) comprises a limiting frame (21), the limiting frame (21) is attached to the FPC board (1), and a steel sheet (22) is clamped on the inner side of the limiting frame (21).

2. The structure for avoiding defective air bubbles of the FPC according to claim 1, wherein the FPC board (1) is provided with a conductive groove (11), and the reinforcing plate (2) is attached to the inner side of the conductive groove (11).

3. The structure for avoiding defective air bubbles of FPC according to claim 2, wherein a cover film (111) is adhered to the inner side of the conductive groove (11), and one side of the limit frame (21) is adhered to the cover film (111).

4. The structure for avoiding defective air bubbles in FPC according to claim 3, wherein the limiting frame (21) comprises an outer frame (211), an operation piece (212) is fixedly provided on an inner wall of the outer frame (211), and a side wall of one side of the outer frame (211) is adhered to the cover film (111).

5. The structure for avoiding defective air bubbles of FPC according to claim 4, wherein a film groove (2111) is formed in a side wall of the outer frame (211), the cover film (111) is adhered to an inner side of the film groove (2111), a limit groove (2112) is formed in an inner wall of the outer frame (211), and the limit groove (2112) is engaged with an outer wall of the steel sheet (22).

6. The structure for avoiding defective air bubbles of FPC according to claim 4, wherein the operation piece (212) includes a vertical paddle (2121) and a lateral paddle (2122), and the vertical paddle (2121) and the lateral paddle (2122) are both located outside the steel sheet (22).

7. The structure for avoiding defective air bubbles of FPC according to claim 6, wherein the vertical pulling piece (2121) and the horizontal pulling piece (2122) have the same structure and are both made of metal materials.

8. The structure for preventing air bubbles from being bad as set forth in claim 4, wherein said outer frame (211) is made of metal.

9. The structure for avoiding defective air bubbles of the FPC according to claim 5, wherein a grid pad (221) is fixedly arranged on one side wall of the steel sheet (22), a limit bar (222) is fixedly arranged on the other side wall of the steel sheet (22), and the limit bar (222) is correspondingly clamped with the limit groove (2112).

10. The structure for preventing air bubbles from being bad as set forth in claim 9, wherein said stop bar (222) is made of rubber.

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