FPC (Flexible Printed Circuit) capable of preventing splicing golden finger from cracking
By setting reinforced gold fingers on the interface end of the FPC, the problem of easy cracking of the FPC's gold fingers relying on the outer gold fingers is solved, and the effect of reducing the defect rate and improving competitiveness is achieved.
Patent Information
- Application Number
- CN202420517334.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The most reliable gold fingers of FPC are easily cracked by pulling at the bending point, resulting in poor contact and increased product defect rate.
An FPC is designed, with multiple normal gold fingers on the interface end, and a reinforced gold finger is provided with an outer edge. The two reinforced gold fingers are arranged at the connection between the interface end and the auxiliary wing, and do not have signal transmission function.
Through the design of reinforced gold fingers, the pulling effect at the bend will only affect the reinforced gold fingers, but will not affect the normal gold fingers, avoiding the cracking of the gold fingers, reducing the product's defect rate, and improving the product's competitiveness.
Smart Images
Figure CN222674583U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printed circuit boards, in particular to an FPC capable of preventing plug-in gold fingers from cracking. Background Art
[0002] The end of the FPC is generally provided with a gold finger, and the FPC is provided with auxiliary wings protruding outward on both sides close to the gold fingers, so that a bend is formed at the end of the FPC. The gold fingers on the left and right sides are easily affected by the pulling of the bend and cracked, causing damage, resulting in poor contact, affecting the normal operation of the FPC, increasing the defective rate of the product, and reducing the competitiveness of the product. Utility Model Content
[0003] The technical problem to be solved by the utility model is how to prevent the outermost gold finger from being damaged by the pulling of the bending part.
[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0005] In order to solve the above technical problems, the utility model provides an FPC for preventing the cracking of plug-in gold fingers, which includes a main body, a connecting part and an interface end, the connecting part is connected to the main body, and two reinforcing plates staggered on both sides of the connecting part are provided; the interface end is arranged at an end of the connecting part away from the main body, and auxiliary wings protruding outward are arranged on both sides of the edge close to the interface end, and a plurality of normal gold fingers arranged in sequence are arranged on the edge of the interface end, and reinforced gold fingers are arranged on the outer edges of the normal gold fingers located on the left and right sides of the plurality of normal gold fingers, and two of the reinforced gold fingers are arranged at the junction of the interface end and the auxiliary wings, and the two reinforced gold fingers do not have a signal transmission function.
[0006] As a preferred implementation of the FPC for preventing the cracking of the plug-in gold finger provided by the utility model, the shape of the reinforced gold finger is a rectangle.
[0007] As a preferred implementation of the FPC for preventing the plug-in gold finger from cracking provided by the utility model, the length of the reinforced gold finger is shorter than the length of the normal gold finger.
[0008] As a preferred implementation of the FPC for preventing the cracking of the plug-in gold fingers provided by the utility model, the widths of the two reinforcing plates are different.
[0009] As a preferred implementation of the FPC for preventing the cracking of the plug-in gold fingers provided by the utility model, the material of the reinforcement plate is FR4, PI or stainless steel.
[0010] As a preferred implementation of the FPC for preventing the cracking of the plug-in gold fingers provided by the utility model, the outer surfaces of the two reinforcing plates are both provided with a surface treatment layer for improving the surface roughness.
[0011] As a preferred embodiment of the FPC for preventing the cracking of the plug-in gold fingers provided by the utility model, the body includes a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.
[0012] As a preferred embodiment of the FPC for preventing the cracking of the plug-in gold fingers provided by the utility model, the main body also includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and the inner wall of the through-hole is provided with a thermal conductive layer in contact with the circuit layer and the metal heat dissipation layer.
[0013] As a preferred implementation of the FPC for preventing the cracking of the plug-in gold finger provided by the utility model, a heat conductor connected to an external heat-conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat-conducting layer.
[0014] As a preferred implementation of the FPC for preventing the cracking of the plug-in gold fingers provided by the utility model, the structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wavy structure or a honeycomb structure.
[0015] The utility model has the following beneficial effects:
[0016] Since reinforced gold fingers are arranged on the outer edges of the normal gold fingers located on the left and right sides among the multiple normal gold fingers, and the two reinforced gold fingers are arranged at the junction of the interface end and the auxiliary wing, when the bending part is affected by pulling, only the reinforced gold fingers will be affected, and the normal gold fingers will not be affected. Since the two reinforced gold fingers do not have the signal transmission function, the normal operation of the FPC will not be affected, and the normal gold fingers will not be damaged due to cracking caused by the pulling of the bending part, thereby avoiding poor contact, reducing the defective rate of the product, and improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 The utility model provides a structural schematic diagram of an FPC for preventing the cracking of a plug-in gold finger.
[0019] Figure 2for Figure 1 Schematic diagram of the structure at the middle interface end.
[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle.
[0021] Figure 4 This is a schematic diagram of the structure of Example 2.
[0022] Description of Figure Numbers:
[0023] Main body 1; connecting part 2; interface end 3; reinforcing plate 4; auxiliary wing 5; normal gold finger 6; reinforced gold finger 7;
[0024] Base material layer 11; circuit layer 12; metal heat dissipation layer 13; through hole 14. DETAILED DESCRIPTION
[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0027] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0028] The utility model provides an FPC for preventing the cracking of plug-in gold fingers, which comprises a body, a connecting part and an interface end, wherein the connecting part is connected to the body, and two reinforcing plates arranged staggered with each other are arranged on both sides of the connecting part; the interface end is arranged at one end of the connecting part away from the body, and auxiliary wings protruding outward are arranged on both sides of the edge close to the interface end, and a plurality of normal gold fingers arranged in sequence are arranged on the edge of the interface end, and reinforced gold fingers are arranged on the outer edges of the normal gold fingers located on the left and right sides of the plurality of normal gold fingers, and two of the reinforced gold fingers are arranged at the junction of the interface end and the auxiliary wings, and the two reinforced gold fingers do not have a signal transmission function.
[0029] Since reinforced gold fingers are arranged on the outer edges of the normal gold fingers located on the left and right sides among the multiple normal gold fingers, and the two reinforced gold fingers are arranged at the junction of the interface end and the auxiliary wing, when the bending part is affected by pulling, only the reinforced gold fingers will be affected, and the normal gold fingers will not be affected. Since the two reinforced gold fingers do not have the signal transmission function, the normal operation of the FPC will not be affected, and the normal gold fingers will not be damaged due to cracking caused by the pulling of the bending part, thereby avoiding poor contact, reducing the defective rate of the product, and improving the competitiveness of the product.
[0030] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.
[0031] Example 1
[0032] See also Figures 1 to 3, an FPC for preventing the cracking of plug-in gold fingers provided by the utility model, comprising a body 1, a connecting part 2 and an interface end 3, wherein the connecting part 2 is connected to the body 1, and two reinforcing plates 4 arranged staggered with each other are arranged on both sides of the connecting part 2; the interface end 3 is arranged at the end of the connecting part 2 away from the body 1, and auxiliary wings 5 protruding outward are arranged on both sides of the edge close to the interface end 3, and a plurality of normal gold fingers 6 arranged in sequence are arranged on the edge of the interface end 3, and reinforced gold fingers 7 are arranged on the outer edges of the normal gold fingers 6 located on the left and right sides of the plurality of normal gold fingers 6, and two reinforced gold fingers 7 are arranged at the junction of the interface end 3 and the auxiliary wings 5, and the two reinforced gold fingers 7 do not have a signal transmission function. Since the outer edges of the normal gold fingers 6 located on the left and right sides of the multiple normal gold fingers 6 are provided with reinforced gold fingers 7, and the two reinforced gold fingers 7 are arranged at the junction of the interface end 3 and the auxiliary wing 5, when the bending part is affected by pulling, only the reinforced gold fingers 7 will be affected, and the normal gold fingers 6 will not be affected. Since the two reinforced gold fingers 7 do not have the signal transmission function, they will not affect the normal operation of the FPC, and the normal gold fingers 6 will not be damaged due to cracking caused by the pulling of the bending part, thereby avoiding poor contact, reducing the defective rate of the product, and improving the competitiveness of the product.
[0033] In the traditional FPC design, the reinforcing plate 4 is usually not provided or the reinforcing plate 4 is provided at the same position and the width of the reinforcing plate 4 is the same, which results in the pressure applied being concentrated on the same straight line when the FPC is plugged in or out, resulting in a slight break in the FPC line. The FPC provided by the utility model has two reinforcing plates 4 located on both sides of the connecting portion 2 and staggered with each other. When the FPC is pulled out, the pressure applied by the reinforcing plates 4 on both sides to the FPC is not on the same line segment, and the stress will not be concentrated on the same straight line when bending, thereby avoiding stress concentration and the problem of easy slight break in the line at the interface end 3, and improving the product yield.
[0034] Furthermore, the shape of the reinforced gold finger 7 is a rectangle, and the length of the reinforced gold finger 7 is shorter than that of the normal gold finger 6 .
[0035] Furthermore, the two reinforcing plates 4 staggered in the present invention may be arranged at two different positions respectively; or the center point may be at the same position, but the widths of the two reinforcing plates 4 are different. As long as the stress of the two reinforcing plates 4 when bent is not concentrated on the same straight line, it can avoid stress concentration and the problem of easy micro-breakage of the line at the interface end 3, thereby improving the product yield. In this embodiment, the reinforcing plates 4 include a first reinforcing plate and a second reinforcing plate, and the widths of each reinforcing plate 4 are different, and the center points thereof are on the same horizontal line, so that the edges of the reinforcing plates 4 are staggered and not concentrated on the same straight line.
[0036] Furthermore, the material of the reinforcing plate 4 is FR4, PI or stainless steel. In other embodiments, if the heat generated by the FPC is relatively large, a heat dissipation material with better heat dissipation effect, such as an aluminum foil reinforcing plate 4, may also be used.
[0037] Furthermore, outer surfaces of the first reinforcing plate and the second reinforcing plate are provided with a surface treatment layer for increasing surface roughness, so as to increase the friction between the worker and the first reinforcing plate and the second reinforcing plate, so that the FPC is easy to pull out.
[0038] Furthermore, the surface treatment layer is provided with diamond knurling on the outer surfaces of the first reinforcing plate and the second reinforcing plate, so that the FPC can be pulled out more easily, reducing the risk of FPC circuit breakage.
[0039] Example 2
[0040] See also Figure 4 As a further optimization scheme of Example 1, in this embodiment, the body 1 includes a substrate layer 11, a circuit layer 12 arranged on the upper surface of the substrate layer 11, and a metal heat dissipation layer 13 arranged on the lower surface of the substrate layer 11. The arrangement method can be that the circuit layer 12 and the metal heat dissipation layer 13 are respectively attached to the substrate layer 11 by double-sided adhesive. Since the thickness of the substrate layer 11 is relatively thin, the heat on the body 1 can be diffused to the metal heat dissipation layer 13 through the substrate layer 11. The metal heat dissipation layer 13 can effectively increase the heat dissipation area of the body 1 and play a role in uniform heat dissipation, thereby improving the heat dissipation efficiency of the body 1. The substrate layer 11 can be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double-sided adhesive is any one of an acrylic adhesive layer or an epoxy resin adhesive layer, and the metal heat dissipation layer 13 can be a copper foil layer.
[0041] Furthermore, the body 1 also includes at least one through-hole 14 penetrating the substrate layer 11, the circuit layer 12 and the metal heat dissipation layer 13, and the inner wall of the through-hole 14 is provided with a heat-conducting layer in contact with the circuit layer 12 and the metal heat dissipation layer 13. By utilizing the good thermal conductivity of the through-hole 14, the circuit layer 12 and the metal heat dissipation layer 13 on both sides of the substrate layer 11 can be electrically connected to play a good thermal conductivity function, and the thermal conductive layer can provide a thermal conductive function to achieve a good heat dissipation effect. Among them, the thermal conductive layer can be a copper glue conductive ink layer.
[0042] Furthermore, a heat conductor connected to an external heat-conducting structure is disposed in the through hole 14, and the heat conductor is connected to the external heat-conducting structure from one side of the circuit layer 12, and is also in contact with the heat-conducting layer in the through hole 14, so that the circuit layer 12 and the metal heat dissipation layer 13 can be connected to the external heat-conducting structure through the through hole 14, so that the heat in the body 1 is diffused to the external heat-conducting structure through the heat conductor in the through hole 14, so as to further improve the heat dissipation efficiency of the body 1. Preferably, in order to enable the through hole 14 to be connected to the external heat-conducting structure, the through hole 14 is disposed at the edge of the body 1.
[0043] Furthermore, the metal heat dissipation layer 13 is a uniform heat dissipation structure, and its structure can be any one of a mesh structure, a strip structure, a wavy structure or a honeycomb structure. Through the uniform heat dissipation structure, the heat dissipation effect can be better improved.
[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0045] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. An FPC for preventing the cracking of the plug-in gold finger, characterized in that: It includes a main body, a connecting part and an interface end, the connecting part is connected to the main body, and two reinforcing plates arranged staggered on both sides of the connecting part are arranged; the interface end is arranged at an end of the connecting part away from the main body, and auxiliary wings protruding outward are arranged on both sides of the edge close to the interface end, and a plurality of normal gold fingers arranged in sequence are arranged on the edge of the interface end, and reinforced gold fingers are arranged on the outer edges of the normal gold fingers located on the left and right sides of the plurality of normal gold fingers, and two of the reinforced gold fingers are arranged at the junction of the interface end and the auxiliary wings, and the two reinforced gold fingers do not have a signal transmission function.
2. The FPC for preventing the cracking of the plug-in gold finger according to claim 1, characterized in that: The shape of the reinforcement gold finger is a rectangle.
3. The FPC for preventing the cracking of the plug-in gold finger according to claim 1, characterized in that: The length of the reinforced golden finger is shorter than that of the normal golden finger.
4. The FPC for preventing the cracking of the plug-in gold finger according to claim 1, characterized in that: The widths of the two reinforcing plates are different.
5. The FPC for preventing the cracking of the plug-in gold finger according to claim 1, characterized in that: The reinforcement plate is made of FR4, PI or stainless steel.
6. The FPC for preventing the cracking of the plug-in gold finger according to claim 1, characterized in that: The outer surfaces of the two reinforcing plates are both provided with a surface treatment layer for improving the surface roughness.
7. The FPC for preventing the cracking of the plug-in gold finger according to claim 1, characterized in that: The body comprises a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.
8. The FPC for preventing the cracking of the plug-in gold finger according to claim 7, characterized in that: The body further includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and an inner wall of the through-hole is provided with a heat-conducting layer in contact with the circuit layer and the metal heat dissipation layer.
9. The FPC for preventing the cracking of the plug-in gold finger according to claim 8, characterized in that: A heat conductor connected to an external heat-conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat-conducting layer.
10. The FPC for preventing the cracking of the plug-in gold finger according to claim 7, characterized in that: The structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wave structure or a honeycomb structure.