TWM613492U - Narrow pitch flexible flat cable - Google Patents

Abstract

The present invention is provided a narrow-pitch flexible flat cable. The narrow-pitch flexible flat cable includes a plurality of conductors and a bonding layer. Each of the conductors has a conducting part and a connecting part. The cross-sections of the conductors located at the conducting part are round and the conductors located at the connecting part are flat. Wherein, the conductors located in the conducting part are separated by a distance and each conductor has a wire diameter. The bonding layer has insulating properties. The bonding layer has a bonding part and an opening part. The bonding part is bonded to the conductors in the conductive part and the opening part corresponds to the conductors in the connecting part. The flat conductors are exposed in the opening part.

Description

Narrow pitch flexible flat cable

This creation is a technical field of flat wires, especially a narrow-pitch flexible flat cable.

The traditional flat cable for electrical connection can be roughly divided into flexible flat cable (Flexible Flat Cable, FFC) and flexible printed circuit board (Flex Print Circuit, FPC) according to its construction method. The former method is by bonding In this way, flat pure copper wires or nickel-plated flat wires are encapsulated in an insulating layer; and the latter method is to form flat wires on a printed circuit board by etching.

Flexible flat wires and flexible printed circuit boards each have their own advantages. Compared with the two, the flexible flat wire does not need to go through the chemical etching process, which can reduce the pollution caused by the chemical and lower the production cost; however, in order to be able to withstand high voltage (about 150 to 500 volts) and insulation characteristics, the conductor The distance between the conductor and the conductor is usually set to be greater than 0.13 mm; however, because the width of the flexible flat wire is 0.3 mm, the minimum pitch between the conductor and the conductor can only reach 0.5 mm, and it cannot enter 0.4 mm. However, the flexible printed circuit board can obtain wires with a narrower width than the aforementioned wires through etching, so that the distance between the conductors of the flexible printed circuit board can be controlled within the range of 0.4 mm; however, As said before Obviously, since the flexible printed circuit board needs to be etched to form the wires, compared to the manufacturing process of the flexible flat wires, the cost is higher and there are concerns about environmental pollution.

In view of this, this creation proposes a narrow-pitch flexible flat cable to solve the problems or unsolvable problems of traditional flexible flat wires and flexible printed circuit boards.

The first purpose of this creation is to provide a narrow-pitch flexible flat cable, which can form a narrow-pitch (for example, 0.4 mm) flexible flat cable with voltage resistance and insulation without using etching technology.

The second purpose of this creation is to provide a sufficient withstand voltage and insulation distance between adjacent conductors, such as a distance greater than or equal to 0.28 mm, based on the aforementioned narrow-pitch flexible flat cable.

The third purpose of this creation is to form a flat conductor by partially flattening a cylindrical shape based on the aforementioned narrow-pitch flexible flat cable for connecting to a connector or a circuit board.

In order to achieve the above and other purposes, this creation provides a narrow-pitch flexible flat cable. The narrow-pitch flexible flat cable contains a plurality of conductors and a bonding layer. Each of the conductors has a conducting part and a connecting part. The cross-sections of the conductors located at the conducting part are round and the conductors located at the connecting part are flat. Wherein, the conductors located in the conducting part are separated by a distance and each of the conductors has a wire diameter. The bonding layer has insulating properties. The bonding layer has a bonding part and an opening part. The bonding part is bonded to the conductors in the conductive part and the opening part corresponds to the conductors in the connecting part. The flat conductors are exposed at the opening.

In one embodiment, the range of the sum of the distance and the wire diameter between the adjacent conductors is 0.4 millimeters (mm). In addition, the distance and the wire diameter may have an error range within 0.1 mm, respectively.

In one embodiment, the pitch range of each of the conductors adjacent to the conductive portion is 0.4 mm. In addition, the pitch has an error range within 0.1 mm.

In one embodiment, the diameter of the wire diameter of each of the conductors located in the conductive portion is 0.12 mm.

In one embodiment, the distance between the conductors adjacent to the conductive part is 0.28 mm.

In one embodiment, the width of each of the conductors at the connecting portion is 0.27 mm. In addition, the width has an error range within 0.1 mm.

In one embodiment, each of the conductive systems located between the conductive portion and the connecting portion has a Y-shaped tapered shape.

In one embodiment, the conductors located at the connecting portion are pressed by a pressing method to press each of the conductors with a circular cross section into each of the conductors in a flat shape, so that each of the conductors located at the connecting portion The equal conductors are cylindrical and each of the conductors located in the conducting part is a flat conductor.

Compared with the existing technology, the narrow-pitch flexible flat cable provided by this creation can achieve the advantages that the flexible flat wire does not need to be etched and the flexible printed circuit board can produce the narrow-pitch flexible flat cable.

10: Narrow pitch flexible flat cable

12, 12’, 12”: Conductor

122: Conduction part

124: Connection

14: Laminated layer

142: Fitting Department

144: Opening

d, d’: distance

:線徑

: Wire diameter

P: Pitch

FIG. 1 is a schematic structural diagram of a narrow-pitch flexible flat cable according to an embodiment of the invention.

Figure 2 is an A-A' cross-sectional view illustrating the narrow-pitch flexible flat cable in Figure 1 of the present creation.

Figure 3 is a B-B' cross-sectional view illustrating the narrow-pitch flexible flat cable of Figure 1 of the present creation.

Fig. 4 is an enlarged schematic diagram illustrating the conductor of Fig. 1 of the present invention.

In order to fully understand the purpose, features and effects of this creation, we will use the following specific embodiments and accompanying drawings to give a detailed description of this creation. The description is as follows.

In this creation, "one" or "one" is used to describe the units, components, and components described herein. This is just for the convenience of explanation and to provide a general meaning to the scope of this creation. Therefore, unless it is clearly stated otherwise, this description should be understood to include one or at least one, and the singular number also includes the plural number.

In this creation, the terms "include", "include", "have", "include" or any other similar terms are intended to cover non-exclusive inclusions. For example, an element, structure, product, or device that contains a plurality of elements is not limited to the elements listed herein, but may include those that are not explicitly listed but are generally inherent to the element, structure, product, or device. Other requirements. In addition, unless there is a clear statement to the contrary, the term "or" refers to the inclusive "or" rather than the exclusive "or".

Please refer to FIG. 1, which is a schematic diagram of the structure of a narrow-pitch flexible flat cable according to an embodiment of the present creation. In FIG. 1, the narrow-pitch flexible flat cable 10 includes a conductor 12 and a bonding layer 14.

In this embodiment, the number of conductors 12 is illustrated by taking 4 as an example. In other embodiments, the number of conductors 12 may be more or less than 4. Among them, the conductor 12 has a conductive portion 122 and a connecting portion 124. In addition, in order to distinguish the conductor 12 located at the conductive portion 122 and the connecting portion 124, they are respectively defined as the conductor 12' (located at the conductive portion 124) and the conductor 12" (located at the conductive portion 124). Connecting part 124). Connecting part 124 Located at the end of the narrow-pitch flexible flat cable 10, that is, the right side of FIG. 1, and the conductive portion 122 is not located at the end of the narrow-pitch flexible flat cable 10, that is, the left side of FIG. 1. Here, one side of the connecting portion 124 is taken as an example. In another embodiment, there may be two connecting portions 124, which are respectively provided at the two ends of the conductive portion 122.

Also refer to Figure 2, which illustrates the A-A' cross-sectional view of the narrow-pitch flexible flat cable in Figure 1 of the present creation. In FIG. 2, it can be understood that the cross-section of the conductor 12' located in the conductive portion 122 is a circular shape (can be a circle, an ellipse, etc.) and the conductor 12" located in the connecting portion 124 is a flat shape. In addition, it can also be Referring to Fig. 3 together, it is a BB' cross-sectional view of the narrow-pitch flexible flat cable in Fig. 1. In Fig. 3, it can be understood that the cross-section of the conductor 12' located in the conductive portion 122 is a circular shape.

In order to achieve the above-mentioned structure, the cylindrical conductor 12 located at the connecting portion 124 is pressed into a flat conductor 12". In addition, between the conductor 12" of the connecting portion 124 and the conductor 12' of the conducting portion 122, due to From a cylindrical shape to a flat shape, the conductor 12 between the connecting portion 124 and the conductive portion 122 has a Y-shaped tapered shape. In other words, the conductor 12" located at the connecting portion 124 is pressed by pressing the conductor 12 with a circular cross-section into a flat conductor 12", so that the conductor 12' located at the conducting portion 122 is cylindrical and the conductor 12' located at the connecting portion 122 The conductor 12" is a flat conductor.

。其中，當導體12’的剖面為圓形時，則線徑

可為導體12’的直徑，例如線徑

的直徑為0.12毫米。於一實施例中，相鄰的導體12’之間的距離d與線徑

的總和的範圍為0.4毫米(mm)。又，位於傳導部122相鄰的導體12’的間距P的範圍可為0.4毫米。於此，間距P指的是導體12的中心至相鄰的導體12的中心之間的距離。於另一實施例中，線徑

、距離d與間距P分別地可具有0.1 毫米內的誤差範圍。因此，線徑

的誤差範圍可以是介於0.02毫米到0.22毫米之間，其誤差可以在小數點以下第二位；距離d的誤差範圍可以是介於0.38毫米到0.18毫米之間，其誤差可以在小數點以下第二位；以及，間距P的誤差範圍可以是介於0.3毫米到0.5毫米之間，其誤差可以在小數點以下第二位。值得注意的是，除上述所列舉的固定數值或是數值範圍，實際上，只要是傳導部122的導體12’的剖面為圓形狀和位於連接部124的導體12”為扁平狀，不管任何尺寸，都屬於本創作所主張的發明範疇。 Also refer to FIG. 4, which is an enlarged schematic diagram of the conductor in FIG. In FIG. 4, it is shown that the conductor 12' located in the conductive portion 122 is separated by a distance d and the conductor 12' has a wire diameter

. Among them, when the cross-section of the conductor 12' is circular, the wire diameter

Can be the diameter of the conductor 12', such as wire diameter

The diameter is 0.12 mm. In one embodiment, the distance d between adjacent conductors 12' and the wire diameter

The range of the sum of is 0.4 millimeters (mm). In addition, the range of the pitch P between the conductors 12' adjacent to the conductive portion 122 may be 0.4 mm. Here, the pitch P refers to the distance from the center of the conductor 12 to the center of the adjacent conductor 12. In another embodiment, the wire diameter

The distance d and the pitch P may have an error range within 0.1 mm, respectively. Therefore, the wire diameter

The error range of can be between 0.02 mm and 0.22 mm, and the error can be in the second decimal place; the error range of distance d can be between 0.38 mm and 0.18 mm, and the error can be below the decimal point The second place; and, the error range of the pitch P can be between 0.3 mm and 0.5 mm, and the error can be the second place below the decimal point. It is worth noting that, in addition to the fixed numerical values or numerical ranges listed above, in fact, as long as the cross-section of the conductor 12' of the conductive portion 122 is circular and the conductor 12" located at the connecting portion 124 is flat, regardless of any size , All belong to the scope of invention advocated by this creation.

的直徑係以0.12毫米為例說明。當線徑

的直徑為0.12毫米時。若間距P設定在0.4毫米(即本創作所稱之窄間距)時，則距離d可以達到0.28毫米，相較於傳統軟性扁平導線的距離只有0.13毫米。在本實施例的窄間距之下，可以有較寬的距離，使得本實施例的窄間距軟性扁平排線10可以承受更高的電壓(或稱工作電壓)；同樣地，在傳統的軟性印刷電路板相同的窄間距的情況下，本實施例不需要進行任何的蝕刻工序。值得注意的是，雖然傳導部122可以承受高電壓，但是就窄間距軟性扁平排線10整體可以承受電壓的高低，仍需要進一步考慮到連接部124所能夠承受電壓的高低。舉例而言，連接部124的耐壓高低係相關於相鄰位於連接部124之相鄰的導體12”之間的距離d’，於本實施例中，位於連接部124的導體12”的寬度例如可為0.27毫米，又寬度具有0.1毫米內的誤差範圍，使得寬度的誤差範圍是介於0.37毫米到0.17毫米之間，其誤差在小數點以下第二位。 For example, in this embodiment, the wire diameter of the conductor 12' located in the conductive portion 122

The diameter of 0.12 mm is taken as an example. When the wire diameter

The diameter is 0.12 mm. If the pitch P is set to 0.4 mm (that is, the narrow pitch referred to in this creation), the distance d can reach 0.28 mm, which is only 0.13 mm compared to the distance of the traditional flexible flat wire. Under the narrow pitch of this embodiment, there can be a wider distance, so that the narrow pitch flexible flat cable 10 of this embodiment can withstand a higher voltage (or working voltage); similarly, in the traditional flexible printing In the case of the same narrow pitch of the circuit board, this embodiment does not require any etching process. It is worth noting that although the conductive portion 122 can withstand high voltage, the narrow-pitch flexible flat cable 10 can withstand the voltage as a whole, and the voltage that the connecting portion 124 can withstand needs to be further considered. For example, the withstand voltage of the connecting portion 124 is related to the distance d'between the adjacent conductors 12" at the connecting portion 124. In this embodiment, the width of the conductor 12" at the connecting portion 124 For example, it can be 0.27 mm, and the width has an error range within 0.1 mm, so that the error range of the width is between 0.37 mm and 0.17 mm, and the error is the second decimal place.

Returning to FIG. 2, the bonding layer 14 has insulating properties. For example, the material of the bonding layer 14 may be polyethylene terephthalate (PET or PETE). Implemented in this In an example, the bonding layer 14 may be composed of two layers of polyethylene terephthalate. When the polyethylene terephthalate is separately arranged on the corresponding sides of the conductor 12 (that is, the upper side and the lower side of FIG. 2), the polyethylene terephthalate on the corresponding side is attached to make the conductor 12 It is covered on the bonding layer 14 and is defined as the bonding portion 142 here, which can be provided corresponding to the conductive portion 122. Also, returning to FIG. 1, the bonding layer 14 includes an opening 144 in addition to the bonding portion 142. The opening 144 corresponds to the conductor 12" located at the connecting portion 124, and is used to expose the flat conductor 12" for connecting an external connector or a circuit board.

This creation has been disclosed in the preferred embodiments above, but those familiar with this technology should understand that the embodiments are only used to describe the creation, and should not be interpreted as limiting the scope of the creation. It should be noted that all changes and replacements equivalent to the embodiments should be included in the scope of this creation. Therefore, the scope of protection of this creation shall be subject to the scope of the patent application.

10: Narrow pitch flexible flat cable

12, 12’, 12”: Conductor

122: Conduction part

124: Connection

14: Laminated layer

144: Opening

Claims (10)

A narrow-pitch flexible flat cable, comprising: a plurality of conductors having conductive parts and connecting parts, the cross-sections of the conductors at the conductive part are round and the conductors at the connecting part are flat, and the conductors at the connecting part are flat. The conductors of the conductive part are separated by a distance, and each of the conductors has a wire diameter; and the bonding layer has insulating properties, the bonding layer has a bonding part and an opening, and the bonding part is pasted The conductors located in the conductive portion and the opening portion correspond to the conductors located in the connecting portion to expose the flat conductors. The narrow-pitch flexible flat cable according to claim 1, wherein between the adjacent conductors, the range of the sum of the distance and the wire diameter is 0.4 millimeters (mm), and the distance and the wire diameter Each has an error range within 0.1 mm. When the diameter of the wire diameter is 0.12 mm, the error range of the wire diameter is between 0.02 mm and 0.22 mm, and the error is within the second decimal place, and the The error range of the distance is between 0.38 mm and 0.18 mm. The narrow-pitch flexible flat cable according to claim 1, wherein the pitch range of each of the conductors adjacent to the conductive portion is 0.4 mm, and the pitch has an error range within 0.1 mm, so that The error range of the pitch is between 0.3 mm and 0.5 mm. The narrow-pitch flexible flat cable according to claim 1, wherein the diameter of the wire diameter of each of the conductors located in the conductive portion is 0.12 mm, and the wire diameter has an error range within 0.1 mm, so that The error range of the wire diameter is between 0.02 mm and 0.22 mm. The narrow-pitch flexible flat cable according to claim 1, wherein the distance between the conductors adjacent to the conductive portion is 0.28 mm, and the distance has an error range within 0.1 mm So that the error range of the distance is between 0.38 mm and 0.18 mm. The narrow-pitch flexible flat cable according to claim 1, wherein the width of each of the conductors at the connecting portion is 0.27 mm, and the width has an error range within 0.1 mm, so that the error range of the width is medium Between 0.37 mm and 0.17 mm. The narrow-pitch flexible flat cable according to claim 1, wherein at least one of the wire diameter, the distance, and the pitch optionally has an error range within 0.1 mm. The narrow-pitch flexible flat cable according to claim 1, wherein each of the conductive systems between the conductive portion and the connecting portion presents a Y-shaped tapered shape. The narrow-pitch flexible flat cable according to claim 1, wherein there are two connecting parts, which are respectively arranged at two ends of the conductive part. The narrow-pitch flexible flat cable according to claim 1, wherein the conductors located at the connecting portion are pressed into each of the flat-shaped conductors by a pressing method. Conductors such that each of the conductors located in the conducting portion is a cylinder and each of the conductors located in the connecting portion is a flat conductor.

Images