JP2001093346A - Coaxial mixed flexible flat cable and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat cable and a coaxial cable, conventionally requiring separate wirings and connections depending on the types of transfer signals, in the form of one axial mixed flat cable, and use an usual flat cable connector as it is. SOLUTION: A coaxial mixed flat cable is formed by mixing two fine coaxial wires 4 in a plurality of straight angle conductors 2, arranging them in parallel at a certain clearance between two insulating films 1, 1, fusing the fine coaxial wires 4 and the straight angle conductors 2 at their ends exposed at a fixed length, and bonding reinforcing films 3 to the single sides of the exposed ends. An external conductor 7 of the fine coaxial wire 4 is connected to the straight angle conductor 2 via a connection conductor (f), an exposed center conductor 5 is removed and a straight angle conductor (g) for a connector is connected thereto to form a coaxial mixed flexible flat cable 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flexible flat cable and a method for manufacturing the same. More specifically,
The present invention relates to a coaxial mixed flexible flat cable in which coaxial lines are mixed in a plurality of rectangular conductors of a flexible flat cable, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Flexible flat cables are used for wiring between printed circuit boards of various electronic devices for the purpose of saving space and easy connection of wiring materials, and a fixed distance between two insulating films. A plurality of rectangular conductors are arranged in parallel to expose both ends of the conductor over a certain length, and a reinforcing film is adhered to one end of each end or one end of the flat conductor. Hereinafter, a wiring method in which a flat cable is combined with an insertion connector has been widely used.

[0003]

In recent years, transmission signals which cannot be handled by a rectangular conductor used in a standard flat cable have been increasing due to a higher speed of a signal in an electronic device having a higher function and a higher frequency of a reception signal. I have. To cope with such transmission signals, coaxial cables will be used,
With the trend toward miniaturization of equipment, there is no room in space for wiring and connection of a coaxial cable alone and connection to a substrate, and work is becoming difficult. Further, twisted pair cables required for differential signals are also used as internal wiring, but EMI countermeasures have been required because signal speeds have been increasing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned various problems of the prior art. A flat cable and a coaxial cable, or shields, which conventionally required separate wiring and connection depending on the type of transmission signal, have been made. It is an object of the present invention to provide a coaxial mixed flat cable that can provide a necessary twisted pair cable in the form of a single coaxial mixed flat cable and that can use a normal flat cable connector as it is, and a method of manufacturing the same.

[0005]

According to a first aspect of the present invention, an inner insulator (6), an outer conductor (7) and a jacket (8) are sequentially provided on the outer periphery of a center conductor (5). One or more micro coaxial wires (4) are mixed with a plurality of rectangular conductors (2),
The two insulating films (1, 1) are arranged in parallel with a certain distance, and both ends of the micro coaxial wire (4) and the rectangular conductor (2) are exposed and fused over a certain length, and exposed. Reinforcing film (3) on one side of both ends or exposed one end
Coaxial mixed flexible flat cable (hereinafter, abbreviated as coaxial mixed flat cable), wherein the outer coaxial wire (4) at the exposed both ends or exposed one end of the coaxial mixed flat cable is ) Is removed from the outer conductor (7) and the rectangular conductor arranged in parallel
(2) is connected by the connecting conductor (f), and the outer cover (8), the outer conductor (7), and the inner insulator (6) on the terminal side of the connecting conductor (f) are partially peeled off. Being a predetermined length of internal insulator
(6) and the center conductor (5) are exposed, and the exposed center conductor is further exposed.
(5) is a coaxial mixed flat cable (10) in which the tip portion or the whole is removed, and a rectangular conductor (g) for connector connection is connected instead. As the connection conductor (f),
A rectangular conductor such as a tin-plated rectangular conductor is preferably used, but is not particularly limited. The rectangular conductor (g) for connecting the connector preferably has the same dimensions and material as the rectangular conductor (2), but is not particularly limited.

[0006] In the coaxial mixed flat cable (10) of the first aspect, even in a device that is becoming smaller in size, a signal that has not been transmitted by a conventional flat cable can be replaced by a single signal together with power and other signals. Batch processing can be performed with coaxial mixed flat cables, and wiring and connection work can be performed efficiently. In addition, since the mixed micro coaxial cable (4) is used for high-frequency transmission, it is possible to perform terminal processing separately for the center conductor (5) and the outer conductor (7). In addition, the external conductor (7) can be grounded for use as a shielded twisted pair cable. Furthermore, since the flat conductor (g) for connecting a connector is connected instead of the exposed central conductor (5) of the micro coaxial cable (4), a normal flat cable connector can be used as it is.

According to a second aspect, the present invention relates to a method for manufacturing a coaxial mixed flat cable (10) according to the first aspect, wherein an inner insulator (6) and an outer conductor are sequentially arranged around an outer periphery of a center conductor (5). One or more of the micro coaxial wires (4) provided with (7) and the jacket (8) are mixed with a plurality of rectangular conductors (2),
The two insulating films (1, 1) are arranged in parallel with a certain distance, and both ends of the micro coaxial wire (4) and the rectangular conductor (2) are exposed and fused over a certain length, and exposed. Reinforcing film (3) on one side of both ends or exposed one end
Adhesive coaxial mixed flexible flat cable base
Forming a coaxial mixed flat cable base (10a), and removing a part of the jacket (8) from the micro coaxial wire (4) at the exposed both ends or the exposed one end of the coaxial mixed flat cable base (10a). Forming an external conductor exposed portion (7 ') to form a coaxial mixed flat cable body (10b), and a flat rectangular conductor (2) in which the coaxial mixed flat cable body (10b) is arranged in parallel. And the exposed outer conductor (7 ') by connecting conductor (f) to connect coaxial mixed flat cable (1
0c), and the outer conductor (8), the outer conductor (7) and the inner insulation of the coaxial mixed flat cable body (10c) closer to the terminal than the connection conductor (f). body
Part of (6) is peeled off to expose a predetermined length of the inner insulator (6) and the center conductor (5), and the coaxial mixed flat cable body (10d) is exposed.
And removing a part or all of the tip of the central conductor (5) of the coaxial mixed flat cable body (10d), and replacing it with a rectangular conductor for connector connection (g). And a method of manufacturing a coaxial mixed flat cable (10) for manufacturing a coaxial mixed flat cable (10) by the step of connecting a flat conductor.

According to the method for manufacturing a coaxial mixed flat cable according to the second aspect, the coaxial mixed flat cable according to the first aspect can be efficiently manufactured. The coaxial mixed flat cable base formation process is based on micro coaxial line (4)
Only a single or a plurality of wires are mixed in a plurality of rectangular conductors (2), and the other steps are the same as those in a normal flat cable manufacturing process. In the outer conductor exposed portion forming step,
As a method of removing a part of the jacket (8), for example, irradiation with a laser beam is preferable, but a method of mechanically shaving may be applied. In the rectangular conductor-external conductor connection step, as a method of connecting the external conductor exposed portion (7 ') with the connection conductor (f), for example, soldering, welding, a conductive adhesive, or the like is used. . In the rectangular conductor connecting step, as a method of connecting the center conductor (5) to the rectangular conductor (g) for connector connection, for example, soldering, welding or the like is used.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The contents of the present invention will be described below in more detail with reference to an embodiment shown in the drawings. Note that the present invention is not limited by this. FIG. 1 is a schematic view showing a first embodiment of a coaxial mixed flat cable according to the present invention. FIG. 2 is a schematic view showing an embodiment of a micro coaxial cable used for the coaxial mixed flat cable of the present invention. FIG. 3 is a schematic view showing a coaxial mixed flat cable base serving as a base of the coaxial mixed flat cable of the present invention. FIG. 4 is a schematic view showing a coaxial mixed flat cable body provided with an external conductor exposed portion during manufacture of the coaxial mixed flat cable of the present invention. FIG. 5 is a schematic view showing a coaxial mixed flat cable body connected by a connecting conductor during manufacture of the coaxial mixed flat cable of the present invention. FIG. 6 is a schematic view showing a coaxial mixed flat cable body in which an inner insulator and a center conductor are exposed during manufacture of the coaxial mixed flat cable of the present invention. FIG. 7 is a chart showing a manufacturing process of the coaxial mixed flat cable of the present invention. In these figures, 1 is an insulating film, 2 is a rectangular conductor, 3 is a reinforcing film, 4 is a micro coaxial line, 5 is a center conductor, 6 is an inner insulator, 7 is an outer conductor, and 7 'is an outer conductor. Exposed portion, 7a is a horizontal winding shield layer, 7b is an Al-PET tape winding layer, 8 is a jacket, 10 is a coaxial mixed flat cable, 10a is a coaxial mixed flat cable base, 10b, 10c and 10d are coaxial mixed flat cables. The body, f is a connecting conductor, and g is a rectangular conductor for connecting a connector.

Embodiment 1 A coaxial mixed flat cable according to Embodiment 1 of the present invention will be described with reference to FIGS. First, the rectangular conductor (2) and the micro coaxial line (4) used in the coaxial mixed flat cable of the present invention will be described. As the rectangular conductor (2), 0.
A tin-plated rectangular conductor of 03 mm × 0.3 mm was used. Also, a micro coaxial line mixed with the plurality of rectangular conductors (2)
As for (4), as shown in FIG. 2, as the center conductor (5), seven stranded tin-plated copper alloy wires each having a conductor of 0.03 mmφ were used, and an inner insulator (6) having a thickness of 0.06 mm was formed on the outer periphery thereof.
The outer periphery of this is covered with a fluorine-based resin, and as an external conductor (7), a horizontally wound shield layer (7a) is first provided by horizontally winding a tin-plated copper alloy wire having a wire diameter of 0.03 mmφ, and then on the outer periphery Aluminum-polyethylene terephthalate resin laminated tape (hereinafter abbreviated as Al-PET tape)
Was wound with the aluminum surface facing inward to form an Al-PET tape winding layer (7b), and then a colored polyester tape was wound as an outer coat (8) on the outer periphery to give an outer diameter of 0.33 mm. A micro coaxial cable (4) was used.

Next, the manufacture of the coaxial mixed flat cable of the present invention will be described in the order of steps. First, in the coaxial mixed flat cable base body forming step F1, the flat rectangular conductor (2)
13 (core) and two horizontal micro coaxial wires (4) (core) are heat-fused to two insulating films, for example, on one side of each film (the inner side during fusion). It is arranged in parallel at a pitch of 0.5 mm between 0.08 mm-thick polyester laminate films (1, 1) provided with an adhesive layer (not shown), and the conductors at both ends are exposed over a certain length and thermally fused. At the same time, a reinforcing polyester film (3) was adhered to one side of this one end to produce a coaxial mixed flat cable base (10a) shown in FIG.

Next, in an external conductor exposed portion forming step F2,
A predetermined portion of the two micro coaxial wires (4) at both ends of the conductor exposed over a certain length of the coaxial mixed flat cable (10a) is irradiated with laser light to remove a part of the jacket (8). Then, an exposed outer conductor (7 ') was provided to obtain a coaxial mixed flat cable body (10b) shown in FIG.

Next, in the rectangular conductor-outer conductor connection step F3, two portions of the outer conductor exposed portion (7 ') of the coaxial mixed flat cable body (10b) and the micro coaxial line (4) are arranged in parallel. A tin-plated rectangular conductor as the connection conductor (f) is vertically arranged and soldered over the rectangular conductor (2), and the outer conductor (7) and the rectangular conductor (2) are connected. The coaxial mixed flat cable body (10c) shown in FIG. 5 was obtained by connecting with the connecting conductor (f). As a result, it is possible to easily perform processing for dividing a signal into a rectangular conductor of a normal flat cable or to ground the rectangular conductor.

Next, an inner insulator and center conductor exposing step F
In 4, an outer jacket (8), an outer conductor (7), and an inner insulator (6) closer to the terminal than the connection conductor (f) from the micro coaxial line (4) of the coaxial mixed flat cable body (10c). ) Was removed to expose predetermined lengths of the inner insulator (6) and the center conductor (5) to obtain a coaxial mixed flat cable body (10d) shown in FIG.

Next, in the rectangular conductor connecting step F5, the entire exposed central conductor (5) of the coaxial mixed flat cable body (10d) (leaving the soldering portion) is cut and removed. As the rectangular conductor for connection (g), the same 0.03 mm × 0.3 as that used for the rectangular conductor (2) was used.
A flat coaxial mixed cable (10) shown in FIG.

[0016]

According to the present invention, the coaxial mixed flat cable is
Since it can be handled in the form of a generally used flat cable, there is no need to separately wire one or more coaxial cables. In addition, the bending resistance has been improved compared to the case where the micro coaxial cable is used alone. Further, since the micro coaxial cable is fixed at a predetermined pitch with high accuracy and a uniform length in the flat cable as in the case of the rectangular conductor, the effect of easily matching the characteristics can be obtained even as a substitute for a twisted pair cable. Further, since the flat conductor for connector connection is connected instead of the exposed center conductor of the micro coaxial cable, a normal flat cable connector can be used as it is. Therefore, the present invention has an extremely large effect of contributing to industry.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of a coaxial mixed flat cable according to the present invention.

FIG. 2 is a schematic view showing an embodiment of a micro coaxial cable used for the coaxial mixed flat cable of the present invention.

FIG. 3 is a schematic view showing a coaxial mixed flat cable base serving as a base of the coaxial mixed flat cable of the present invention.

FIG. 4 is a schematic view showing a coaxial mixed flat cable body provided with an external conductor exposed portion during manufacture of the coaxial mixed flat cable of the present invention.

FIG. 5 is a schematic view showing a coaxial mixed flat cable body connected by a connecting conductor during manufacture of the coaxial mixed flat cable of the present invention.

FIG. 6 is a schematic view showing a coaxial mixed flat cable body exposing an inner insulator and a center conductor during manufacture of the coaxial mixed flat cable of the present invention.

FIG. 7 is a chart showing a manufacturing process of the coaxial mixed flat cable of the present invention.

[Description of Signs] 1 Insulating film 2 Rectangular conductor 3 Reinforcing film 4 Micro coaxial line 5 Center conductor 6 Inner insulator 7 External conductor 7 'External conductor exposed portion 7a Horizontal shield layer 7b Al-PET tape winding layer 8 External 10 Coaxial mixed flat cable 10a Coaxial mixed flat cable base 10b, 10c, 10d Coaxial mixed flat cable body f Connection conductor g Connector connection flat rectangular conductor

Claims (2)

[Claims] An inner insulator is sequentially provided on the outer periphery of the center conductor (5).
(6) One or more micro coaxial wires (4) provided with an outer conductor (7) and a jacket (8) are connected to a plurality of rectangular conductors (2).
And the two insulating films (1, 1) are arranged in parallel with a certain distance, and the both ends of the micro coaxial wire (4) and the rectangular conductor (2) are exposed and fused over a certain length. A coaxial mixed flexible flat cable having a reinforcing film (3) adhered to one side of the exposed both ends or one end of the exposed coaxial mixed flexible flat cable, wherein the exposed coaxial mixed flexible flat cable has an extremely thin end or one exposed end. The outer conductor (7) of the coaxial wire (4) with a part of the jacket (8) removed and the rectangular conductor (2) arranged in parallel are connected by the connecting conductor (f). Outer conductor (8), outer conductor (7) on the terminal side than conductor (f)
And the internal insulator (6) is partially peeled to expose a predetermined length of the internal insulator (6) and the central conductor (5), and further, the tip portion or all of the exposed central conductor (5) is removed, A coaxial mixed flexible flat cable (10), characterized in that a rectangular conductor (g) for connector connection is connected instead. 2. A method for manufacturing a coaxial mixed flexible flat cable (10) according to claim 1, wherein an inner insulator (6) and an outer conductor are sequentially arranged around the outer periphery of the center conductor (5).
(7) and one of the micro coaxial wires (4) provided with the jacket (8)
Or two or more rectangular conductors (2)
A plurality of insulating films (1, 1) are arranged in parallel with a certain separation distance, and both ends of the micro coaxial wire (4) and the rectangular conductor (2) are exposed and fused over a certain length, and both exposed ends are exposed. A reinforcing film (3) is adhered to one side of the exposed or one end of the exposed coaxial mixed flexible flat cable base (1
0a) a coaxial mixed flexible flat cable base forming step, and the coaxial mixed flexible flat cable base (10a)
From the exposed micro coaxial cable (4) at both exposed ends or exposed one end
(8) removing an external conductor exposed portion (7 ') to form an coaxial mixed flexible flat cable body (10b) by providing an external conductor exposed portion (7'); andthe coaxial mixed flexible flat cable body (10b). The rectangular conductor (2) and the exposed outer conductor (7 ')
A flat rectangular conductor-external conductor connecting step of connecting the coaxial mixed flexible flat cable body (10c) by connecting them with the connecting conductor (f), and the coaxial mixed flexible flat cable body (10c).
A part of the outer cover (8), the outer conductor (7) and the inner insulator (6) on the terminal side of the connection conductor (f) is peeled off, and the inner insulator (6) having a predetermined length and the center are removed. An inner insulator-center conductor exposing step of exposing the conductor (5) to form a coaxial mixed flexible flat cable body (10d); and the coaxial mixed flexible flat cable body (10d).
A flat coaxial mixed flexible flat cable (10) is manufactured by removing a part or all of the tip of the center conductor (5) and connecting the flat rectangular conductor for connector connection (g) instead. A method for producing a coaxial mixed flexible flat cable, characterized in that: