JP4020050B2 - Cable connection - Google Patents

Description

  The present invention relates to a cable connecting portion that connects an electric circuit for an electric device or an antenna and a cable, and more particularly to a cable connecting portion that improves the tensile strength of the cable.

  Various cables are connected to the circuit portion and other electric circuits in the electric equipment. In view of space and cost in the electric equipment, a dedicated connector and / or solder is often used to connect these cables and the electric circuit.

  The prior art document information related to the invention of this application includes the following.

Japanese Utility Model Publication No. 5-15330 JP-A-6-104548 Japanese Utility Model Publication No. 6-33364 JP 7-1335036 A JP-A-7-240244 JP 2000-278837 A

  However, if the cable is pulled with excessive tension if the workability and the configuration of the connector part and / or soldering part are not appropriate in the cable routing work performed when assembling the product or connecting the electrical circuit and the cable In addition, the connector part and the soldering part may be damaged (deformation, peeling, etc.). In particular, in recent information equipment that performs high-speed data transmission, if a connector part or a soldering part is damaged, a fatal problem occurs in terms of characteristics and performance.

  Cellular phones and mobile PCs tend to use a large number of coaxial cables as their housings become smaller and lighter. In addition, the configuration of connectors and soldering parts has become smaller and simpler. Is progressing. Moreover, it is necessary to avoid damage to the connector part and the soldering part by maintaining and improving the tensile strength of the cable.

  In other words, at the cable connection where the electrical circuit and cable are connected, the tensile strength of the various electrical circuits and dedicated connectors, as well as the various cables connected by soldering, etc. Must be able to withstand At the same time, troublesome work must be reduced. In addition, the configuration of the cable connection must be simpler with reduced costs.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cable connection portion that maintains and improves the tensile strength of the cable without damaging the soldering portion with a simple configuration.

The present invention has been devised to achieve the above object, and the invention according to claim 1 is a cable connecting portion connecting an electric circuit constituting a planar antenna and a cable, wherein the electric circuit is a plate-like conductor. And a film in which the conductor is covered with an insulating material, and in the electric circuit, a part of the film is erected vertically with respect to the upper surface of the conductor and is formed on the erection part. The cable connecting portion is characterized in that a relaxation member including a cable insertion hole through which the cable is inserted is provided.

  According to the present invention, with a simple configuration, an excellent effect of maintaining and improving the tensile strength of the cable without damaging the soldered portion is exhibited.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

  FIG. 1A is a perspective view of a cable connecting portion showing a preferred embodiment of the present invention. FIG.1 (b) is the AA sectional view taken on the line of Fig.1 (a).

  As shown in FIG. 1 (a) and FIG. 1 (b), the cable connecting portion 1 according to the present embodiment connects an electric circuit 2 and one end of a coaxial cable 3 subjected to terminal processing as a cable by soldering. It is a thing.

  The coaxial cable 3 is used to supply electric power to the electric circuit 2 or to transmit a high-frequency signal to the electric circuit 2. For example, the other end (not shown) is connected to the power supply circuit. In this coaxial cable 3, an insulator 5 is formed on the outer periphery of the inner conductor 4, an outer conductor 6 is formed on the outer periphery of the insulator 5, and a sheath 7 is formed on the outer periphery of the outer conductor 6.

  The electric circuit 2 is formed by attaching a film 9 made of an insulating material such as polyimide to the entire surface (in this example, the upper surface, the bottom surface, and the left and right side surfaces) of a plate-shaped conductor 8 made of metal, and removing a part of the conductor 8. And covered with a film 9.

  The electric circuit 2 is also called a film antenna or a planar antenna, and is used, for example, installed in a frame around an LCD (liquid crystal display) panel of a personal computer or attached to a rear glass of a vehicle.

  In this example, an example of the electric circuit 2 in which the film 9 is attached to the conductor 8 will be described. However, an electric circuit in which an antenna circuit such as a radiating element or a ground portion is formed on the film may be used. .

  Here, the film 9 is used for the purpose of avoiding electrical interference with other metal objects when the actual electric circuit 2 is used, and for maintaining and protecting the strength of the electric circuit 2 itself. Further, in order to solder and electrically connect the coaxial cable 3 and the conductor 8, a part of the film 9 covering the upper surface of the conductor 8 is removed in advance by etching, for example, so that the upper surface of the conductor 8 is Some are exposed.

  Now, in the vicinity of the center of the other end portion (the left end portion in FIGS. 1 (a) and 1 (b)) 9L of the film 9 is assembling the cable connecting portion 1 or connecting the electric circuit 2 and the coaxial cable 3. A relaxation member 10 is provided to relieve the tension applied to the coaxial cable 3 in the cable routing operation sometimes performed. The other end 9 </ b> L side of the film 9 is a direction in which the coaxial cable 3 is drawn from the electric circuit 2.

  The relaxation member 10 is constituted by a part of the film 9 and is integrated with the film 9. The relaxation member 10 is a cable in which the coaxial cable 3 is inserted in a horizontal direction (left and right directions in FIGS. 1A and 1B) into a standing portion 11 that stands vertically upward with respect to the upper surface of the conductor 8. The insertion hole 12 is formed.

  A method for assembling the cable connecting portion 1 will be described. First, one end of the coaxial cable 3 is terminated, and the inner conductor 4 and the outer conductor 6 are exposed. The coaxial cable 3 after the terminal processing is inserted into the cable insertion hole 12 of the relaxing member 10 (from the left side in FIGS. 1A and 1B). Furthermore, if the radiating element portion of the conductor 8 and the inner conductor 4 are soldered to form a soldered portion 13i, and the ground portion of the conductor 8 and the outer conductor 6 are soldered to form the soldered portion 13o, A cable connection 1 is obtained.

  Next, using this cable connecting portion 1, as shown in FIGS. 2A and 2B, a tensile test of the coaxial cable 3 in three directions of + x direction, + z direction, and −x direction is performed. Carried out. Here, the −x direction is a direction in which the coaxial cable 3 is drawn out from the electric circuit 2, and the + x direction is an opposite direction that is different from the −x direction by 180 °. The + z direction is a vertically upward direction of the cable connection portion 1.

  Moreover, the said tension test was done with respect to the Example and the comparative example. The embodiment is the cable connecting portion 1 of FIGS. 1A and 1B, and the comparative example is a cable connecting portion having the same configuration as the cable connecting portion 1 except that the relaxing member 10 is not provided. Evaluation of the tensile strength is based on the tensile strength of the comparative example in the + x direction and the −x direction, that is, 1N (N = Newton) as a standard, and the case where the tensile strength is 5 times (= 5N) or more of the standard is evaluated as good (◯). The case where the tensile strength was less than 5 times was evaluated as inferior (x).

  As shown in Table 1, in the cable connection portion 1 of the example, since the relaxation member 10 is provided in the electric circuit 2, the tensile strength of the coaxial cable 3 is any of the + x direction, the + z direction, and the -x direction. In particular, it can be seen that the tensile strength in the + x direction and the + z direction is greatly improved and improved as compared with the cable connection portion of the comparative example.

  The operation of the present embodiment will be described.

  Since the cable connection portion 1 is provided with the relaxation member 10 in the electric circuit 2, in assembling the cable connection portion 1 or connecting the electric circuit 2 and the coaxial cable 3, Since the tension applied to the coaxial cable 3 is relaxed and absorbed by the deflection and deformation of the relaxation member 10, even if a large tension is applied to the coaxial cable 3, the force applied to the soldering portions 13i and 13o is greatly reduced.

  Accordingly, since the cable connecting portion 1 is hardly subjected to damages such as deformation and peeling on the soldering portions 13i and 13o, the soldering portions 13i and 13o are not damaged and the tensile strength of the coaxial cable 3 is maintained. Can improve.

  In addition, the cable connection portion 1 has a simple configuration of the relaxation member 10 and does not require a connector for connection between the electric circuit 2 and the coaxial cable 3, so that the electric circuit 2 is low in cost and required depending on the application. Even when each specification of the coaxial cable 3 is changed, damage such as deformation or peeling of the soldering portions 13i and 13o can be prevented in the routing operation of the coaxial cable 3, and the tensile strength of the coaxial cable 3 can be maintained and improved. .

  In particular, in the cable connecting portion 1, since the relaxation member 10 is formed of a part of the film 9 and is integrated with the film 9, the tension applied to the coaxial cable 3 is dispersed throughout the film 9, and the soldering portion It is possible to reliably prevent concentration on 13i and 13o.

  A second embodiment will be described.

As shown in FIG. 3, the cable connecting portion 31 includes an electric circuit 33 in which a film 32 made of an insulating material such as polyimide is attached to the entire surface of the conductor plate 8 and a portion of the conductor 8 is covered with the film 32. Then, one end of the coaxial cable 3 subjected to the terminal treatment is connected by soldering to form the soldering portions 13i and 13o (see FIGS. 1A and 1B), and then the soldering portions 13i, so as to cover the 13o, in which pasted tacky adhesive tape 34 on the upper surface of the film 32.

  The adhesive tape 34 is made of a non-metallic material and has sufficient adhesion to the film 32 so as not to deteriorate the electrical characteristics of the electrical circuit 33 and the coaxial cable 3 (does not affect the electrical characteristics). To do.

  The film 32 in the portion covering the upper surface of the conductor 8 is also partially removed by etching in advance, for example, in order to electrically connect the coaxial cable 3 and the conductor 8 by soldering, and the upper surface of the conductor 8 is partially It is supposed to be exposed.

  In the cable connecting portion 31, one end of the coaxial cable 3 and the soldering portions 13i and 13o are suppressed by the adhesive tape 34 and are fixed to the electric circuit 33. Therefore, the cable connecting portion 31 shown in FIGS. 1 (a) and 1 (b) is used. The same effect as the cable connection part 1 is obtained. Moreover, since the coaxial cable 3 can be routed in all directions at the cable connection portion 31, the degree of freedom in the routing direction of the coaxial cable 3 can be made higher than that of the cable connection portion 1.

  Further, in the cable connection portion 31, unless the adhesive tape 34 is peeled off, the tension applied to the coaxial cable 3 by the drawing of the coaxial cable 3 does not reach the soldering portions 13i and 13o.

  As described with reference to FIGS. 2A and 2B, the cable connection portion 31 was subjected to a tensile test of the coaxial cable 3 in the same manner as the cable connection portion 1. As a result, the same results as in Table 1 were obtained. It was.

  A third embodiment will be described.

As shown in FIG. 4, the cable connecting portion 41 connects the electrical circuit 33 and one end of the coaxial cable 3 subjected to terminal processing by soldering to connect the soldering portions 13i and 13o (FIG. 1A and FIG. 1). b)) after forming, further, at least the soldering portion 13i, and then cured by applying an adhesive to 13o, contact attaching portion 42i, is obtained by forming a 42o.

  As the adhesive, an adhesive made of a non-metallic material and having sufficient adhesiveness with the film 32 is used so as not to deteriorate the electrical characteristics of the electric circuit 33 and the coaxial cable 3.

  In the cable connecting portion 41, tension is directly applied to the soldering portions 13i and 13o by the routing of the coaxial cable 3, but the strength of the soldering portions 13i and 13o is improved by the bonding portions 42i and 42o. ) And FIG. 2B, when the tensile test of the coaxial cable 3 was performed in the same manner as the cable connection portion 1, the soldering portions 13i and 13o were not damaged or deformed. There wasn't.

  Further, if an adhesive is applied and cured so as to cover one end of the coaxial cable 3 and the soldering portions 13i and 13o, the soldering portions 13i and 13o are less likely to be damaged, and the tensile strength of the coaxial cable 3 is increased. Can be improved more.

A reference example of the present invention will be described.

  As shown in FIG. 5, the cable connection portion 51 is obtained by connecting an electric circuit 52 in which a wiring pattern (not shown) is formed on a substrate made of an insulating material and the coaxial cable 3 by soldering. Specifically, the signal line pattern of the electric circuit 52 and the inner conductor 4 of the coaxial cable 3 are soldered to form a soldered portion 13i, and the ground pattern of the electric circuit 52 and the outer conductor of the coaxial cable 3 are soldered. To form a soldering portion 13o. The electric circuit 52 is also called a printed wiring board.

  A relaxation member 53 is provided near the center of one side surface (left side surface in FIGS. 5 and 6) 52s of the electric circuit 52. More specifically, as shown in FIG. 6, the relaxing member 53 rises vertically upward with respect to the upper surface of the electric circuit 52 and is fixed to one side 52 s of the electric circuit 52, and the rising portion 54. And a horizontal portion 55 fixed to the bottom surface 52d of the electric circuit 52, and is formed in an L-shaped cross section. The standing portion 54 is formed with a cable insertion hole 56 through which the coaxial cable 3 before soldering is inserted in the horizontal direction (left and right directions in FIGS. 5 and 6).

  As the relaxation member 53, a member made of a non-metallic material such as plastic having high flexibility is used so as not to deteriorate the electrical characteristics of the electric circuit 52 and the coaxial cable 3.

  The relaxation member 53 is attached to the electric circuit 52 by fixing the standing portion 54 and one side surface 52s of the electric circuit 52, and fixing the horizontal portion 55 and the bottom surface 52d of the electric circuit 52 by, for example, adhesive or screwing. To do.

  The same effect as the cable connection part 1 of Fig.1 (a) and FIG.1 (b) is acquired also by the cable connection part 51. FIG.

  As a modification of the cable connecting portion 51, as shown in FIG. 7, when the electric circuit 72 is formed of a printed wiring board having a multilayer structure (two layers in FIG. 7), the upper and lower sides constituting the electric circuit 72 are The horizontal member 55 of the relaxation member 53 is sandwiched between the layers 72u and 72d, and the relaxation member 53 may be fixed to the electric circuit 72 by an adhesive or screwing to form the cable connection portion 71.

  As a modified example of the cable connection portions 51 and 71, as in the case of the cable connection portion 41 of FIG. 4, instead of the relaxation member 53, at least the soldering portions 13 i and 13 o are coated with an adhesive and cured, An adhesive portion may be formed.

Another reference example of the present invention will be described.

As shown in FIG. 8, the cable connecting portion 81, the electric circuit 52, through the electrical circuit 52 in the vertical, before soldering of the coaxial cable 3 is inserted from the lower side to the upper side to form a Luque Buru insertion hole 82 Then, after the coaxial cable 3 is inserted into the cable insertion hole 82 from below to above, the electric circuit 52 and the coaxial cable 3 are connected by soldering.

  On the edge and inner surface of the cable insertion hole 82, a non-metallic material such as a plastic having high flexibility is applied so that the coaxial cable 3 is not damaged and the electric characteristics of the electric circuit 52 are not deteriorated. The coaxial cable 3 may be protected by filling a gap between the insertion hole 82 and the coaxial cable 3. The cable insertion hole 82 can also be fixed by adjusting the size of the diameter according to the diameter of the coaxial cable 3 to be used.

In cable connection portion 81, the tension applied to the coaxial cable 3 is alleviated and absorbed by the flexibility of the coaxial cable 3 itself. Thereby, the force applied to the soldering portions 13i and 13o can be reduced, and damage to the soldering portions 13i and 13o can be prevented.

  In particular, since the cable connection portion 81 directly forms the cable insertion hole 82 as a relaxation member in the electric circuit 52, there is an advantage that the number of parts can be reduced as compared with the embodiment described above.

  In the above embodiment, an example in which each electric circuit and a coaxial cable are connected has been described. However, the same effect can be obtained by using a flat cable in which a plurality of conductors are arranged in parallel instead of the coaxial cable. It is done.

FIG. 1A is a perspective view of a cable connecting portion according to a preferred embodiment of the present invention. FIG.1 (b) is the AA sectional view taken on the line of Fig.1 (a). FIG. 2A is a diagram for explaining a tensile test performed on the cable connection portion shown in FIG. 1A and FIG. 1B (FIG. 2A: + x direction, FIG. 2B: + z direction, −x direction). is there. It is a perspective view which shows 2nd embodiment. It is a perspective view which shows 3rd embodiment. It is a perspective view which shows the reference example of this invention . FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. FIG. 6 is a cross-sectional arrow view showing a modification of the cable connecting portion shown in FIG. 5. It is a perspective view which shows the other reference example of this invention .

Explanation of symbols

1 Cable connection 2 Electrical circuit 3 Coaxial cable (cable)
8 Conductor 9 Film 10 Relaxation member

Claims (1)

In the cable connection portion connecting the electric circuit and the cable constituting the planar antenna, the electric circuit is composed of a plate-like conductor and a film in which the conductor is covered with an insulating material. A cable comprising: a relief member comprising an upright portion in which a part of the film is erected vertically with respect to the upper surface of the conductor; and a cable insertion hole that is formed in the upright portion and through which the cable is inserted. Connection part.

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