Flexible printed circuit (FPC) structure capable of reducing tearing at bending position

Abstract

The embodiment of the utility model belongs to the technical field of FPC. The utility model also relates to an FPC structure for reducing the tearing of the bending position, and the FPC structure comprises an FPC main body, the side surface of the FPC main body is provided with a pasting part, and the pasting part is used for achieving the connection between the FPC main body and a backlight iron stand after the FPC main body is bent. The FPC main body is provided with the pasting part, the pasting part is used for realizing the connection of the FPC main body and the backlight iron stand after the FPC main body is bent, the arching height is reduced, the risk that the bending position is torn is reduced, and the situation that the bending position is in direct contact with an operator or other materials is reduced due to the arrangement of the pasting part, so that the production efficiency is improved. The situation that the bending position scratches operators or other materials can be effectively reduced, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of FPC, and more specifically, to an FPC structure for reducing tearing at the bending position. Background Art

[0002] With the rapid development of modern electronic technology, the integration degree of electronic devices has been continuously improved, and the connection requirements for internal components have become increasingly strict. As an important connection component, the flexible printed circuit board (FPC) has been widely used in electronic products such as smart phones, tablet computers, and wearable devices due to its good flexibility and bendability. However, the design of the bending position of the FPC has always been one of the key challenges in the design of these devices;

[0003] The traditional FPC bending position design usually adopts simple bending angles and radii to adapt to the layout and space limitations inside the device. However, in practical applications, this design has many deficiencies. First of all, since the transition between the hardness and flexibility of the FPC at the bending position is not smooth enough, stress concentration is easily generated during the bending process, resulting in scratches or tears at the bending position of the FPC. This not only affects the service life of the FPC, but also may have a negative impact on the overall performance and reliability of the device; Secondly, the traditional FPC bending position design often has a certain arching height after bending. This arching height not only increases the space occupation inside the device, but also may cause interference to the contact and cooperation with other components. Especially in some devices with extremely strict space requirements, this arching height may even cause the device to be unable to be assembled or operated normally; In addition, the bending position of the FPC cable will scratch personnel and other materials such as foam. Therefore, we make improvements on this and propose an FPC structure for reducing tearing at the bending position.

[0004] For example, Chinese Patent (Publication No. CN210042360U) discloses an FPC corner anti-tearing structure, and its specification discloses that: currently, the working frequency of electronic devices is getting higher and higher, and the signal integrity problem of the signal transmission path, especially the signal integrity problem of the FPC, is particularly prominent. When the FPC is subjected to a large external force, it is easy to cause cracking or breaking, and the traditional design only chamfers the corners. Since the FPC will generate stress on the corners during use, fractures will still occur at the corner positions, resulting in a reduction in the service life of the FPC product. The above patent can prove the defects existing in the prior art. Summary of the Utility Model

[0005] The technical problem to be solved by the embodiments of the utility model is the problems that the FPC bending position is prone to tearing, arching, and scratching personnel or materials.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An FPC structure for reducing tearing at the bending position, comprising: an FPC main body, with an adhesive part arranged on the side of the FPC main body. The adhesive part is used to connect the FPC main body to the backlight iron frame after the FPC main body is bent. In this application, by arranging the adhesive part on the FPC main body, which is used to connect the FPC main body to the backlight iron frame after the FPC main body is bent, the arch height is reduced, thereby reducing the risk of tearing at the bending position. Moreover, the arrangement of the adhesive part reduces the situation where the bending position directly contacts the operator or other materials, and can effectively reduce the situation of scratching the operator or other materials at the bending position, improving production efficiency and product quality.

[0008] As an improved way of the present utility model, the FPC main body has an FPC bending position body, and the FPC bending position body is located on one side of the adhesive part.

[0009] As an improved way of the present utility model, the adhesive part is used to connect to the backlight iron frame after the FPC bending position body is bent, so as to reduce the arch height of the FPC bending position body.

[0010] As an improved way of the present utility model, the adhesive part includes an outwardly expanding ear arranged on one side of the FPC main body, and a double-sided adhesive is arranged on the outwardly expanding ear.

[0011] As an improved way of the present utility model, the double-sided adhesive is used to connect the outwardly expanding ear to the backlight iron frame after the FPC bending position body is bent.

[0012] As an improved way of the present utility model, the outwardly expanding ear and the FPC main body are integrally arranged.

[0013] As an improved way of the present utility model, the length of the double-sided adhesive is less than the length of the outwardly expanding ear.

[0014] As an improved way of the present utility model, a protective part is further arranged on the side of the double-sided adhesive away from the outwardly expanding ear, and the protective part is used for the protection before the double-sided adhesive is pasted.

[0015] As an improved way of the present utility model, the protective part is a release film, and the release film is pasted on the side of the double-sided adhesive away from the outwardly expanding ear.

[0016] As an improved way of the present utility model, the length of the release film is greater than the length of the double-sided adhesive.

[0017] Compared with the prior art, the embodiments of the present utility model mainly have the following beneficial effects:

[0018] To solve the problems in the prior art that the bending position of the FPC is prone to tearing, arching, and scratching personnel or materials, the present application sets a pasting part on the FPC main body. The pasting part is used to connect the FPC main body with the backlight iron frame after the FPC main body is bent, reducing the arching height, thereby reducing the risk of tearing at the bending position. Moreover, the setting of the pasting part reduces the direct contact between the bending position and the operator or other materials, and can effectively reduce the situation that the bending position scratches the operator or other materials, improving the production efficiency and product quality. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the FPC structure for reducing tearing at the bending position provided by the present application;

[0020] Figure 2 It is the Figure 1 partial rear view structural diagram of the FPC structure for reducing tearing at the bending position provided by the present application;

[0021] Figure 3 It is a schematic structural diagram when the double-sided adhesive of the FPC structure for reducing tearing at the bending position provided by the present application is bonded to the backlight iron frame.

[0022] Labels in the figure:

[0023] 1. FPC main body; 101. FPC bending position main body; 2. Outer expansion ear; 3. Double-sided adhesive. Detailed Embodiments

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this utility model. Mentioning "embodiment" in this article means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this utility model. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] As described in the background art, traditional FPC bending position designs usually adopt simple bending angles and radii to adapt to the internal layout and space limitations of devices. However, in actual applications, such designs have many deficiencies. First of all, since the transition between the hardness and flexibility of the FPC at the bending position is not smooth enough, stress concentration is likely to occur during the bending process, resulting in scratches or tears at the FPC bending position. This not only affects the service life of the FPC, but may also have a negative impact on the overall performance and reliability of the device. Secondly, traditional FPC bending position designs often have a certain arch height after bending. This arch height not only increases the space occupied inside the device, but may also interfere with the contact and cooperation with other components. Especially in some devices with extremely strict space requirements, this arch height may even cause the device to be unable to be assembled or operated normally. In addition, the FPC cable bending position will scratch personnel and other materials such as foam.

[0026] To solve this technical problem, the present utility model provides an FPC structure that reduces tearing at the bending position.

[0027] Specifically, please refer to Figures 1-2 , the FPC structure that reduces tearing at the bending position specifically includes:

[0028] The FPC main body 1, a pasting portion is provided on the side surface of the FPC main body 1, and the pasting portion is used to connect the FPC main body 1 with the backlight iron frame after the FPC main body 1 is bent.

[0029] For the FPC structure that reduces tearing at the bending position provided by the present utility model, in this application, a pasting portion is provided on the FPC main body 1, and the pasting portion is used to connect the FPC main body 1 with the backlight iron frame after the FPC main body 1 is bent, reducing the arch height, thereby reducing the risk of tearing at the bending position. Moreover, the setting of the pasting portion reduces the direct contact between the bending position and the operator or other materials, and can effectively reduce the situation of the bending position scratching the operator or other materials, improving the production efficiency and product quality.

[0030] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0031] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] The First Embodiment of the FPC Structure for Reducing Tearing at the Bending Position of the Utility Model

[0034] Please refer to Figures 1-3 , the FPC structure for reducing tearing at the bending position of the utility model includes: an FPC main body 1, and a pasting part is arranged on the side surface of the FPC main body 1. The pasting part is used to realize the connection between the FPC main body 1 and the backlight iron frame after the FPC main body 1 is bent. In this application, by arranging the pasting part on the FPC main body 1, the pasting part is used to realize the connection between the FPC main body 1 and the backlight iron frame after the FPC main body 1 is bent, reducing the arch height, thereby reducing the risk of tearing at the bending position. Moreover, the arrangement of the pasting part reduces the situation that the bending position directly contacts the operator or other materials, and can effectively reduce the situation that the bending position scratches the operator or other materials, improving the production efficiency and product quality.

[0035] Furthermore, as Figures 1-2 shown, the FPC main body 1 has an FPC bending position body 101, which is located on one side of the pasting part, and the FPC bending position body 101 is bent when the FPC main body 1 is used.

[0036] Furthermore, as Figure 3 shown, the pasting part is used for the connection between the FPC bending position body 101 and the backlight iron frame after the FPC bending position body 101 is bent, so as to reduce the arch height of the FPC bending position body 101, thereby reducing the risk of tearing of the FPC bending position body 101.

[0037] Furthermore, as Figures 1-2 shown, the pasting part includes an outwardly extending ear 2 arranged on one side of the FPC main body 1, and a double-sided adhesive 3 is arranged on the outwardly extending ear 2. The outwardly extending ear 2 provides the required carrier for the arrangement of the double-sided adhesive 3. The number of the outwardly extending ears 2 and the double-sided adhesives 3 is two. By arranging two outwardly extending ears 2 and double-sided adhesives 3 on both sides of the FPC main body 1 respectively, multi-point fixation of the FPC main body 1 is realized, and such an arrangement can improve the stability of the fixation of the FPC main body 1.

[0038] Furthermore, the double-sided adhesive 3 is used to realize the connection between the outwardly extending ear 2 and the backlight iron frame after the FPC bending position body 101 is bent, that is, after the FPC bending position body 101 is bent, pasting the double-sided adhesive 3 to the side edge of the backlight iron frame can reduce the arch height of the FPC bending position body 101, thereby reducing the risk of tearing of the FPC bending position body 101.

[0039] Furthermore, the outwardly extending ear 2 and the FPC main body 1 are integrally arranged, and the outwardly extending ear 2 is made of the same material paper as the PI layer of the FPC main body 1, that is, the outwardly extending ear 2 is manufactured together during the production process of the FPC main body 1, without additional production steps or materials, optimizing the product structure, reducing material waste, and reducing production costs.

[0040] Further, as Figure 2 shown, the length of the double-sided adhesive 3 is less than that of the outwardly extending ear 2, so that a part of the end of the outwardly extending ear 2 away from the FPC main body 1 is not provided with the double-sided adhesive 3. This setting can reduce the situation where the operator's hand gets stuck to the double-sided adhesive 3 during pasting, resulting in a decrease in the adhesiveness of the double-sided adhesive 3. And when it is necessary to repair or replace the FPC main body 1, it can be conveniently removed from the backlight iron frame, reducing the difficulty and cost of repair and replacement.

[0041] Embodiment 2 of the FPC structure for reducing tearing at the bending position of the present utility model

[0042] Please refer to Figures 1-3 , the FPC structure for reducing tearing at the bending position of the present utility model includes: an FPC main body 1, and a pasting part is arranged on the side surface of the FPC main body 1. The pasting part is used to realize the connection between the FPC main body 1 and the backlight iron frame after the FPC main body 1 is bent. In this application, by arranging the pasting part on the FPC main body 1, the pasting part is used to realize the connection between the FPC main body 1 and the backlight iron frame after the FPC main body 1 is bent, reducing the arch height, thereby reducing the risk of tearing at the bending position. And the setting of the pasting part reduces the situation where the bending position directly contacts the operator or other materials, and can effectively reduce the situation of scratching the operator or other materials at the bending position, improving the production efficiency and product quality.

[0043] Further, as Figures 1-2 shown, the FPC main body 1 has an FPC bending position body 101, which is located on one side of the pasting part, and the FPC bending position body 101 is bent when the FPC main body 1 is in use.

[0044] Further, as Figure 3 shown, the pasting part is used for the connection between the FPC bending position body 101 and the backlight iron frame after the FPC bending position body 101 is bent, so as to reduce the arch height of the FPC bending position body 101, thereby reducing the risk of tearing of the FPC bending position body 101.

[0045] Further, as Figures 1-2 shown, the pasting part includes an outwardly extending ear 2 arranged on one side of the FPC main body 1, and a double-sided adhesive 3 is arranged on the outwardly extending ear 2. The outwardly extending ear 2 provides the required carrier for the setting of the double-sided adhesive 3. The number of the outwardly extending ears 2 and the double-sided adhesives 3 is two. By arranging two outwardly extending ears 2 and double-sided adhesives 3 on both sides of the FPC main body 1 respectively, multi-point fixation of the FPC main body 1 is realized. This setting can improve the stability of the fixation of the FPC main body 1.

[0046] Furthermore, the double-sided adhesive 3 is used to connect the extended ear 2 to the backlight iron frame after the FPC bending position body 101 is bent. That is, after the FPC bending position body 101 is bent, pasting the double-sided adhesive 3 onto the side of the backlight iron frame can reduce the arching height of the FPC bending position body 101, thereby reducing the risk of tearing of the FPC bending position body 101.

[0047] Furthermore, the extended ear 2 and the FPC main body 1 are integrally arranged. The extended ear 2 is made of the same paper material as the PI layer of the FPC main body 1. That is, the extended ear 2 is manufactured together during the production process of the FPC main body 1, without additional production steps or materials, optimizing the product structure, reducing material waste, and lowering production costs.

[0048] Furthermore, as Figure 2 shown, the length of the double-sided adhesive 3 is less than the length of the extended ear 2, so that a part of the end of the extended ear 2 far from the FPC main body 1 is not provided with the double-sided adhesive 3. This setting can reduce the situation where the operator's hand gets stuck to the double-sided adhesive 3 during pasting, resulting in a decrease in the adhesiveness of the double-sided adhesive 3. And when it is necessary to repair or replace the FPC main body 1, it can be conveniently removed from the backlight iron frame, reducing the difficulty and cost of repair and replacement.

[0049] Furthermore, a protective part is also provided on the side of the double-sided adhesive 3 far from the extended ear 2. The protective part is used for the protection of the double-sided adhesive 3 before pasting, reducing the situation where the adhesiveness of the double-sided adhesive 3 decreases due to the influence of the external environment before pasting.

[0050] Furthermore, the protective part is a release film, and the release film is pasted on the side of the double-sided adhesive 3 far from the extended ear 2. The release film can protect the double-sided adhesive 3, reducing the situation where the adhesiveness of the double-sided adhesive 3 decreases due to the influence of the external environment before pasting.

[0051] Furthermore, the length of the release film is greater than the length of the double-sided adhesive 3. This setting enables one end of the release film to extend beyond the double-sided adhesive 3 to be used as a handle for tearing, thereby facilitating the tearing off of the release film.

[0052] During use, referring to Figure 3 , for the convenience of description and understanding, in this application, A is used to represent the cover plate of the display module, B is used to represent the backlight iron frame of the display module, and they are marked in the figure. After the FPC main body 1 is bound to the display module, it is bent at the FPC bending position body 101 on the back of the backlight iron frame. During this process, the extended ear 2 can be pasted on the backlight iron frame through the double-sided adhesive 3. At this time, the arching height of the FPC bending position body 101 can be reduced, thereby reducing the risk of tearing of the FPC bending position body 101.

[0053] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all embodiments. The preferred embodiments of the present utility model are shown in the drawings, but they do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, is similarly within the scope of the patent protection of the present utility model.

Claims

1. An FPC structure for reducing tearing at a bending position, characterized in that: include: An FPC body (1) is provided with an adhesive portion on a side surface of the FPC body (1), and the adhesive portion is used to achieve connection between the FPC body (1) and a backlight iron frame after the FPC body (1) is bent.

2. The FPC structure for reducing bending tearing according to claim 1, characterized in that: The FPC main body (1) comprises an FPC bending position body (101), and the FPC bending position body (101) is located at one side of the adhesive portion.

3. The FPC structure for reducing bending tearing according to claim 2, characterized in that: The adhesive portion is used for connecting the FPC bending position body (101) to the backlight iron frame after being bent, so as to reduce the arch height of the FPC bending position body (101).

4. The FPC structure for reducing bending tearing according to claim 3, characterized in that: The adhesive portion comprises an outer expansion ear (2) arranged on one side of the FPC body (1), and a double-sided adhesive (3) is arranged on the outer expansion ear (2).

5. The FPC structure for reducing tearing at bending positions according to claim 4, characterized in that: The double-sided adhesive (3) is used to achieve the connection between the external expansion ear (2) and the backlight iron frame after the FPC bending position body (101) is bent.

6. The FPC structure for reducing bending tearing according to claim 5, characterized in that: The external expansion ear (2) and the FPC main body (1) are integrally arranged.

7. The FPC structure for reducing bending tearing according to claim 5 or 6, characterized in that: The length of the double-sided adhesive (3) is shorter than the length of the outer expansion ear (2).

8. The FPC structure for reducing tearing at bending positions according to claim 7, characterized in that: A protective portion is also provided on the side of the double-sided adhesive tape (3) away from the outer expansion ear (2), and the protective portion is used for protecting the double-sided adhesive tape (3) before sticking.

9. The FPC structure for reducing tearing at bending positions according to claim 8, characterized in that: The protective part is a release film, and the release film is adhered to the side of the double-sided adhesive (3) away from the outer expansion ear (2).

10. The FPC structure for reducing tearing at bending positions according to claim 9, characterized in that: The length of the release film is greater than the length of the double-sided adhesive (3).

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