Laminated flat cable
By designing the overlapping cable, the existing FPC cables have large space occupancy, easy to tear and easy to damage in dynamic environments, achieving the effects of saving space, improving reliability and adaptability.
Patent Information
- Application Number
- CN202421587685.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-06
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-06
AI Technical Summary
The existing FPC cables take up a large space, are prone to tear, and are prone to damage in dynamic environments.
An overlapping line is designed, by dividing the FPC line into multiple strips according to a preset width, and forming an undivided area at both ends, with PIN pins and an acetate cloth on the outside to provide protection.
It effectively reduces the space occupied by the cable, improves its wear resistance and durability, reduces damage caused by long-term use, and improves adaptability and production efficiency.
Smart Images
Figure CN222775014U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of FPC, in particular to a laminated cable. Background Art
[0002] FPC (Flexible Printed Circuit Board) cable is a flexible circuit board used to connect electronic components. It is made of a flexible substrate (usually polyester film or polyimide film), has bendability and flexibility, and is suitable for applications that require bending or narrow space. FPC cable is commonly used in mobile devices, internal connections of electronic products, etc., and has the characteristics of small size, light weight, and high reliability. While providing electrical connections, it can also save space and improve product reliability and durability.
[0003] At present, FPC cables still have the following problems. On the one hand, the existing FPC cables are generally relatively wide and thin, occupying a large plane space and easily torn from the edge. On the other hand, when used in dynamic environment scenarios, such as the moving part of the printer and the rotating part of the camera, the FPC cables have no corresponding protection structure and are prone to friction with the inside of the device, which can easily cause cable damage after long-term use. Therefore, the utility model proposes a laminated cable to at least partially solve the problems that may exist in the prior art. Utility Model Content
[0004] In order to overcome the above problems or at least partially solve the above problems, an embodiment of the utility model provides a stacked cable to at least partially solve the problems that may exist in the prior art.
[0005] The embodiment of the utility model is achieved as follows:
[0006] The present application also provides a stacked cable, including:
[0007] An FPC line of a first preset width, which is composed of two substrate layers, and copper wires distributed in parallel at preset intervals between the substrate layers;
[0008] The FPC line is divided into at least two strips from the middle to the two ends according to a preset second preset width, and an undivided area of a first preset length is formed at both ends; the FPC line is provided with a PIN pin of a second preset length in the undivided area at both ends thereof, facing one of the substrate layers;
[0009] The strips are overlapped and covered with acetate cloth on the outside.
[0010] In some embodiments of the present invention, a reinforcement layer is provided on the back of the PIN pin; and an identification mark is provided on the reinforcement layer.
[0011] In some embodiments of the present invention, the rear end of the reinforcement layer, located on the undivided area, is further provided with an anti-cracking tape 107 .
[0012] In some embodiments of the present invention, 3M double-sided tape is attached to the acetate cloth.
[0013] In some embodiments of the present invention, the copper wire spacing is 0.5 mm.
[0014] In some embodiments of the present invention, a conductive film layer is further provided outside the substrate layer.
[0015] In some embodiments of the present invention, the FPC line is divided into three strips, and the FPC line is divided into 18 cores or 22 cores; wherein, the 22-core FPC line is divided into three strips of 8 cores, 7 cores and 7 cores, and the 18-core FPC line is divided into three strips of 6 cores, 6 cores and 6 cores.
[0016] The present application provides a method for preparing a laminated cable, comprising:
[0017] Lamination step: Lamination of the composite layer with substrate layers on both sides and a copper wire layer in the middle at a pressure of 0.5-1kg and a speed of 0.8-3.2m / min at 160℃-240℃ to obtain a lamination line;
[0018] Cutting step: cutting along the gaps of the copper wires according to a first preset width to form strip lines, cutting the strip lines along the gaps of the copper wires according to a second preset width and retaining the first preset lengths at both ends of the strip lines, and peeling off a second preset length of one of the substrate layers at both ends of the strip lines to form PIN pins of the exposed copper wires, wherein the second preset length is not greater than the first preset length;
[0019] The step of overlapping and wrapping is as follows: overlapping a plurality of parts of the second preset width in the middle of the strip line, and wrapping the overlapping positions with acetate cloth to obtain an overlapping cable.
[0020] In some embodiments of the utility model, before the lamination step, it also includes: laying a plurality of parallel copper wires at a preset distance on the substrate layer, covering the substrate layer on the copper wire layer to form a composite layer with substrate layers on both sides and a copper wire layer in the middle.
[0021] In some embodiments of the present invention, the method of laying a plurality of parallel copper wires at a preset distance on the substrate layer, and covering the substrate layer on the copper wire layer to form a composite layer with substrate layers on both sides and a copper wire layer in the middle includes:
[0022] PP or PI material is used as a substrate layer, and a plurality of parallel flat copper wires with a distance of 0.5 mm are laid thereon, and the substrate layer is then covered thereon to form a composite layer with substrate layers on both sides and a copper wire layer in the middle.
[0023] In some embodiments of the present invention, the method of laying a plurality of parallel copper wires at a preset distance on the substrate layer, covering the substrate layer on the copper wire layer to form a composite layer with substrate layers on both sides and a copper wire layer in the middle, further includes:
[0024] The surface of the copper wire is subjected to nickel plating or tin plating treatment to obtain a copper wire with a nickel plating or tin plating layer.
[0025] In some embodiments of the present invention, before the cutting step, the method further comprises:
[0026] Laminating step: a conductive film with a thickness of 0.06 mm is pressed onto the surface of at least one substrate layer of the pressing line.
[0027] In some embodiments of the present invention, after the step of overlapping the wrapping cloth, the method further comprises:
[0028] Marking step: at both ends of the strip line, a reinforcement layer with a length not greater than a first preset length and the same width as the strip line is attached to the base material layer located on the instep side of the PIN, and the reinforcement layer at both ends is marked in different forms to form identification marks on the reinforcement layer.
[0029] In some embodiments of the present invention, the strip line is further coated with an anti-cracking tape at the rear end of the reinforcement layer toward the middle of the strip line.
[0030] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:
[0031] The FPC line with a first preset width is composed of two substrate layers and copper wires distributed in parallel at preset intervals between the substrate layers; the FPC line is divided into at least two strips from the middle to both ends according to a preset second preset width, and an undivided area of a first preset length is reserved at both ends; in the undivided areas at both ends of the FPC line, one side of the substrate layer is provided with an uncovered area of a second preset length, so that the copper wire is exposed to form a PIN pin; the strips are overlapped and coated with acetate cloth on the outside. The technical problems of large space occupation, easy tearing and easy damage in dynamic environments existing in traditional FPC cables are effectively solved, bringing many beneficial effects such as saving space, improving reliability, enhancing adaptability and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0033] Figure 1 A schematic diagram of a layered structure of a stacked cable provided in one embodiment of the utility model;
[0034] Figure 2 It is a schematic diagram of the front structure of an overlapping cable provided in an embodiment of the utility model without overlapping;
[0035] Figure 3 This is a schematic diagram of the front structure of a stacked cable provided in one embodiment of the utility model;
[0036] Figure 4 It is a schematic diagram of the back structure of a stacked cable provided in one embodiment of the utility model;
[0037] Figure 5 It is a schematic diagram of the structure of a coating anti-cracking tape for a laminated cable provided in one embodiment of the utility model;
[0038] Figure 6 The present invention is a flowchart of a method for preparing a laminated cable according to an embodiment of the present invention.
[0039] In the figure: 101, copper wire; 102, base material layer; 103, PIN pin; 104, reinforcement layer; 105, acetate cloth; 106, identification mark; 107, anti-cracking tape. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the adsorption diagram in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the adsorption diagram here can be arranged and designed in various different configurations.
[0041] In the following, some embodiments of the present application are described in detail in conjunction with the adsorption diagram. In the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0042] Please refer to Figure 6 As shown, an embodiment of the utility model provides a method for preparing a stacked cable, which includes:
[0043] Step S101, a pressing step: pressing a composite layer with substrate layers on both sides and a copper wire layer in the middle at a pressure of 0.5-1 kg and a speed of 0.8-3.2 m / min in an environment of 160° C.-240° C. to obtain a pressed line;
[0044] Step S102, cutting step: cutting by laser or blade along the gap of the copper wire according to the first preset width to form a strip line, cutting the strip line along the gap of the copper wire according to the second preset width and retaining the first preset length at both ends of the strip line, and peeling off one of the substrate layers at both ends of the strip line to form a PIN foot, wherein the second preset length is not greater than the first preset length;
[0045] Step S103, overlapping and wrapping step: overlapping a plurality of portions of the second preset width in the middle of the strip line, and wrapping the overlapping position with acetate cloth to obtain an overlapped cable.
[0046] By laminating the composite layer under high temperature and pressure conditions, the materials can be more tightly combined and the thickness of the materials can be reduced. By overlapping the middle parts of multiple strip lines and covering them with acetate cloth, an additional protective layer is provided for the above-mentioned FPC cable, which can effectively reduce the direct friction between the cable and other components inside the device, improve the wear resistance and durability of the cable in a dynamic environment, and thus reduce the damage to the cable caused by long-term use. In addition, since the cable is divided into multiple groups for overlapping, although the thickness of the middle part of the cable is increased and the width of the middle part of the cable is reduced, when it is set in the device, it can be reduced to the width of the cable opening, and the location of the acetate cloth coating is set at the corner or corner or a sharper position in the device, thereby improving the strength of the cable; the design of overlapping cloth wrapping enables the FPC cable to better adapt to various complex working environments, especially in application scenarios of high-frequency vibration and frequent bending, and its protective structure can significantly extend the service life of the cable; by adopting laser cutting technology, the size and shape of the cable can be accurately controlled, the automation level and processing accuracy of production are improved, the production cycle is shortened, and the labor cost is reduced.
[0047] Next, a laminated cable in this exemplary embodiment will be further described.
[0048] In one embodiment of the present application, as in the above-mentioned step S101 of the pressing step, specifically, a composite layer having substrate layers on both sides and a copper wire layer in the middle can be pressed at a pressure of 0.6 kg and a speed of 1.8 m / min at 200°C to obtain a pressing line; by pressing the composite layer under high temperature and pressure conditions, the materials can be more tightly combined and the thickness of the materials can be reduced.
[0049] In one embodiment of the present application, before the lamination step, it further includes: laying a plurality of parallel copper wires at a preset distance on the substrate layer, covering the substrate layer on the copper wire layer, and forming a composite layer with substrate layers on both sides and a copper wire layer in the middle. The FPC can be prepared in full, and then the wiring can be divided according to the use requirements and the number of wires to form the required wiring.
[0050] In one embodiment of the present application, the method of laying a plurality of parallel copper wires at a preset distance on a substrate layer, covering the substrate layer on the copper wire layer, and forming a composite layer with substrate layers on both sides and a copper wire layer in the middle includes: using PP or PI material as a substrate layer, laying a plurality of parallel flat copper wires at a distance of 0.5 mm on it, and covering the substrate layer on it, to form a composite layer with substrate layers on both sides and a copper wire layer in the middle. By setting the spacing of the copper wires to 0.5 mm, the copper wires can be arranged more densely on a substrate layer of unit width, and the width of the wiring can be reduced accordingly.
[0051] The above-mentioned PP is a relatively cheap plastic material with good chemical stability and good electrical insulation. The above-mentioned PI material can withstand very high temperatures, with a long-term use temperature of more than 250 degrees Celsius, and also has good strength and rigidity, and can maintain stability even at high temperatures.
[0052] In one embodiment of the present application, a plurality of parallel copper wires are laid on the substrate layer at a preset distance, and the substrate layer is covered on the copper wire layer to form a composite layer with the substrate layer on both sides and the copper wire layer in the middle, and the process also includes: nickel plating or tin plating the surface of the copper wire to obtain a copper wire with a nickel or tin plating layer; by adding a plating layer on the copper wire, the copper surface can be effectively protected, and tin plating is preferred in the present application.
[0053] In one embodiment of the present application, before the cutting step, a coating step is also included: a conductive film with a thickness of 0.06 mm is applied on the surface of at least one substrate layer of the pressed wire. The 0.06 mm conductive film layer can provide a shielding effect for the cable, thereby preventing external electromagnetic interference from affecting the signal inside the laminated cable when the laminated cable is used.
[0054] As an example, the above-mentioned FPC line is divided into three strips, and the FPC line is divided into 18 cores or 22 cores; wherein, the 22-core FPC line is divided into three strips of 8 cores, 7 cores and 7 cores, and the 18-core FPC line is divided into three strips of 6 cores, 6 cores and 6 cores. Since the 22-core FPC line is not divided equally, it is divided into three strips of 8 cores, 7 cores and 7 cores that are closest to equal division, and the above-mentioned 18-core FPC line can be divided equally into three 6-core strips. FPC lines with other core numbers can be divided similarly and are not listed one by one.
[0055] In one embodiment of the present application, after the step of stacking the wrapping cloth, a step of marking is also included: a reinforcement layer having a length not greater than a first preset length and the same width as the strip line is attached to the base material layer on the instep side of the PIN at both ends of the strip line, and the reinforcement layer at both ends is marked in different forms to form identification marks on the reinforcement layer. Different identification marks can be marked on the reinforcement layers at both ends to identify the front and back.
[0056] It should be noted that although the above-mentioned overlapping cable is a kind of FPC cable, electrical connection can be achieved by swapping the connections at both ends. Reversing the positive and negative directions may cause more serious crosstalk between signals during signal transmission. Although the probability of crosstalk affecting the normal operation of signals and equipment is a few thousandths, the head and tail ends can be easily identified by adding different identification marks.
[0057] In one embodiment of the present application, Figure 5 As shown, the strip line is also covered with an anti-cracking tape 107 at the rear end of the reinforcement layer toward the middle of the strip line; the anti-cracking tape 107 can prevent the middle opening of the overlapped cable from being torn apart from the PIN pin by the external force.
[0058] In one embodiment of the present application, a stacked cable is also disclosed. The stacked cable is prepared by the above preparation method, and its structure is as follows: Figures 1 to 4 As shown, the stacked cable includes: an FPC line of a first preset width, for example, it can be an FPC line of various widths such as 10mm or 20mm, which is composed of two layers of substrate layers 102, and copper wires 101 distributed in parallel with each other at an interval of 0.5mm between the substrate layers 102; the FPC line is divided into at least two strips from the middle to both ends according to a preset second preset width, for example, the FPC line can be divided into three parts with equal or slightly different widths; an undivided area of a first preset length is reserved at both ends of the FPC line, and the FPC line, in the undivided areas at both ends, one side of the substrate layer is provided with an uncovered area of a second preset length, specifically, the substrate layer covering the copper wire at both ends of the undivided area is cut, and the cutting depth is not greater than the thickness of the substrate layer, so that the substrate layer can be peeled off, and the uncovered area is formed by peeling off the second preset length, wherein the present application preferably cuts and peels off the substrate layer of the same layer, so that the copper wire 101 is exposed to form the PIN pin 103, that is, the PIN pin can face the same surface; the strips are arranged in a stacked manner, and the outside is coated with acetate cloth 105. For example, a 20 mm or longer length is reserved at both ends of the FPC line as an undivided area, or a layer of about 5 mm of the substrate layer 102 at both ends of the undivided area is removed to expose the copper wire 101 to become the PIN pin 103, and the covering area of the above-mentioned acetate cloth 105 can be determined according to actual needs.
[0059] In one embodiment of the present application, Figure 4 As shown, a reinforcing layer 104 is provided on the back of the PIN pin 103; and an identification mark 106 is provided on the reinforcing layer 104. The identification mark 106 facilitates identification of both ends of the cable to prevent reverse connection, and the reinforcing layer 104, such as PP, is used to reinforce the PIN pin 103 so that the position has better strength.
[0060] In one embodiment of the present application, the rear end of the reinforcement layer 104 is provided on the undivided area and is also covered with an anti-cracking tape 107 (not shown in the figure); the acetate cloth can also be adhered with 3M double-sided tape to facilitate the cable to be well bonded and fixed to the inside of the device after installation.
[0061] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. Although optional embodiments of the utility model embodiments have been described, once those skilled in the art know the basic creative concept, they can make additional changes and modifications to these embodiments. Therefore, the attached claims are intended to be interpreted as including optional embodiments and all changes and modifications that fall within the scope of the utility model embodiments.
[0062] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.
[0063] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. At the same time, for those skilled in the art, according to the principle and implementation method of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.
Claims
1. A laminated cable, characterized in that: include: An FPC line of a first preset width, which is composed of two substrate layers, and copper wires distributed in parallel at preset intervals between the substrate layers; The FPC line is divided into at least two strips from the middle to the two ends according to a preset second preset width, and an undivided area of a first preset length is formed at both ends; the FPC line is provided with a PIN pin of a second preset length in the undivided area at both ends thereof, facing one of the substrate layers; The strips are overlapped and covered with acetate cloth on the outside.
2. The laminated cable according to claim 1, characterized in that: A reinforcing layer is provided on the back of the PIN pin; and an identification mark is provided on the reinforcing layer.
3. The laminated cable according to claim 2, characterized in that: The rear end of the reinforcing layer, located on the undivided area, is also provided with an anti-cracking tape.
4. The laminated cable according to claim 1, characterized in that: The acetate cloth is adhered with 3M double-sided tape.
5. The laminated cable according to claim 1, characterized in that: The copper wire spacing is 0.5 mm.
6. The laminated cable according to claim 1, characterized in that: A conductive film layer is also provided outside the substrate layer.
7. The laminated cable according to claim 1, characterized in that: The FPC line is divided into three strips, and the FPC line is divided into 18 cores or 22 cores; wherein the 22-core FPC line is divided into three strips of 8 cores, 7 cores and 7 cores, and the 18-core FPC line is divided into three strips of 6 cores, 6 cores and 6 cores.