JP2009206043A - Small-diameter coaxial cable harness and small-diameter coaxial cable connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-diameter coaxial cable harness capable of connecting cases with excellent waterproofness maintained, and excellent in miniaturization of a bending radius and durability against repetitive bending. <P>SOLUTION: In the small-diameter coaxial cable harness 11 where a plurality of small-diameter coaxial cables 12 are bundled and a first case 1 and a second case 2 capable of changing these position relations are connected with each other, a uniting section 10 for bundling the small-diameter coaxial cables 12 is in a cylindrical shape, and a waterproofing section 23 is watertightly mounted on the uniting section 10 at a location where an introduction position to the first case 1 and the second case 2 is mounted. The uniting section 10 is made of a tube 21, a gap against the waterproofing section 23 is covered with the tube 21, and an end section of the tube 21 is watertightly connected with the waterproofing section 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thin coaxial cable harness formed by bundling a plurality of thin coaxial cables.

In a small precision device such as a portable terminal or a small video camera, circuit boards in a casing that are slidably or pivotably connected to each other are connected by a power distribution material.
In such a precision small device, a flexible wiring board is used as a power distribution material, and a waterproof member for sealing a through hole through which the flexible wiring board is inserted is wrapped with a part of the flexible wiring board by insert molding. One that is integrally molded and has improved waterproofness by a waterproofing member is known (see, for example, Patent Document 1).

JP 2006-344813 A

By the way, the flexible wiring board has a large bending radius and has a drawback that the signal line is easily disconnected by repeated bending. For this reason, it is conceivable to use a harness in which a small-diameter coaxial cable is bundled which can reduce the bending radius and is advantageous for repeated bending. In addition, the small-diameter coaxial cable has the advantage of being able to perform stable signal transmission with excellent noise characteristics.
However, since this coaxial cable harness is a bundle of coaxial cables, the outer shape of the cross section is indefinite, and a gap is formed between the coaxial cables, so that it is difficult to waterproof the through holes of each housing.

  Accordingly, an object of the present invention is to provide a thin coaxial cable harness that can connect casings while obtaining good waterproof properties, and has excellent durability against repeated bending and a reduction in bending radius.

A thin coaxial cable harness according to the present invention that can solve the above-mentioned problems is a thin coaxial cable harness that connects two casings in which a plurality of thin coaxial cables are bundled and the positional relationship can be changed. And
The bundling portion for bundling the small-diameter coaxial cable has a cylindrical shape,
A waterproof part is attached to the bundling part in a watertight manner at a place attached to the introduction part to the housing in the small-diameter coaxial cable harness.

  In the thin coaxial cable harness of the present invention, the bundling portion is made of a waterproof tube, the space between the waterproof portions is covered with the waterproof tube, and an end of the waterproof tube is connected to the waterproof portion in a watertight manner. Is preferred. The waterproof tube can be made of a soft resin such as a fluororesin, polyolefin, or silicone rubber. The waterproof tube may be a porous body made of these materials as long as waterproofness is maintained.

  In the thin coaxial cable harness of the present invention, it is preferable that the waterproof tube and the waterproof portion are watertightly attached by caulking with a metal or a heat-shrinkable resin.

  In the thin coaxial cable harness of the present invention, it is preferable that the waterproof tube is watertightly attached by being press-fitted into the waterproof portion.

  In the thin coaxial cable harness of the present invention, it is preferable that connectors are attached to both ends or one end of the coaxial cable harness.

  According to the thin coaxial cable harness of the present invention, water does not permeate from the bundling portion into the thin coaxial cable therein. Since the water-tight waterproof part is provided for the bundling part at the introduction point to the casing, the water is transmitted through the small coaxial cable harness by attaching the waterproof part to the casing in a water-tight manner. It does not enter the body. Therefore, the casings can be connected to each other by the thin coaxial cable harness while ensuring the waterproofness of the casings.

Hereinafter, an example of an embodiment of a thin coaxial cable harness according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, in this embodiment, each of the first casing 1 and the second casing 2 of the mobile phone terminal 3 including the first casing 1 and the second casing 2 is a small coaxial cable. Connected by a harness 11.

In the mobile phone terminal 3, the end portions of the first housing 1 and the second housing 2 are rotatably connected by a hinge 4, and the positional relationship is changed by opening and closing.
The first housing 1 and the second housing 2 have cable insertion holes 5 and 6 formed on end surfaces on the connection side thereof, and the small coaxial cable harness 11 is formed from these cable insertion holes 5 and 6. Both ends are introduced respectively.
In addition, a communication hole 4a is formed in the hinge 4, and a small-diameter coaxial cable harness 11 is inserted into the communication hole 4a.

  As shown in FIG. 2, the small-diameter coaxial cable harness 11 has a bundling portion 10 in which a plurality (20 to 60) of small-diameter coaxial cables 12 are bundled, and both ends are the first of the mobile phone terminal 3. A connector 13 for connection to a wiring board (not shown) in the housing 1 and the second housing 2 is attached and terminated.

  The thin coaxial cable 12 has a structure having a center conductor, an inner insulator, an outer conductor, and a jacket from the center to the outer side in a radial cross section orthogonal to the center axis. After being processed, the outer conductor, the inner insulator, and the center conductor are exposed to a predetermined length stepwise and connected to the connector 13. Further, the thin coaxial cable harness 11 may include a thin insulated cable having no external conductor in addition to the plural thin coaxial cables 12. In the drawing, the number of thin coaxial cables 12 is reduced and simplified.

  The small-diameter coaxial cable 12 referred to in the present invention is a coaxial cable thinner than the AWG 40 according to the standard of AWG (American Wire Gauge). It is desirable to use a fine coaxial cable thinner than the AWG44. Thereby, the thin coaxial cable harness 11 is easy to bend, and can reduce the resistance when the first housing 1 and the second housing 2 are rotated. Further, when the bundling portion 10 is formed by bundling a plurality of small-diameter coaxial cables 12, the diameter of the small-diameter coaxial cable harness 11 can be reduced, enabling high-density wiring in a limited wiring space. To do.

  The bundling portion 10 constituting the small-diameter coaxial cable harness 11 includes about 20 to 60 small-diameter coaxial cables 12. When the small-diameter coaxial cable 12 is AWG 46, the tube is used as a bundling portion 10, and the bundling portion 10 is bent into a U shape when the small-diameter coaxial cable 12 is inserted into the bundling portion 10 as a bundle. The width of the U-shape can be within 5 mm to 10 mm. Although the width of the U-shape increases with an increase in the number of cores (the number of small-diameter coaxial cables 12), even if 60 narrow-diameter coaxial cables 12 of the AWG 44 are bundled, the U-shaped width can be within 12 mm.

As shown in FIG. 3, in the small-diameter coaxial cable harness 11, the binding portion can be a tube 21. A part of the tube 21 is inserted into a communication hole 4 a formed in the hinge 4 of the mobile phone terminal 3. The tube 21 is formed of, for example, a soft resin such as a fluororesin, polyolefin, or silicone rubber, or a porous body thereof. The tube 21 is preferably a waterproof tube having waterproofness. The bundling portion may be a cylinder formed by winding a film or tape.
As shown in FIG. 4, both ends of the tube 21 are connected to a seal cap (cap) 22.

  The seal cap 22 is made of, for example, a hard resin such as ABS, and the small-diameter coaxial cable 12 is inserted through an insertion hole 24 formed at the center thereof. The seal cap 22 has a disk-like flange portion 25 extending radially outward, and an O-ring 26 made of silicone rubber or the like is attached to the outer peripheral portion of the flange portion 25. . The O-ring 26 itself is impermeable to water, and the seal cap 22 and the O-ring 26 constitute the waterproof part 23.

  The seal cap 22 has a cylindrical portion 27 extending from one surface side of the flange portion 25, and this cylindrical portion 27 is inserted into the tube 21. A caulking member 28 is attached to the outer periphery of the cylindrical portion 27 via the tube 21. The caulking member 28 is made of, for example, spring steel. The caulking member 28 presses the tube 21 to the cylindrical portion 27 of the seal cap 22 by the urging force of the caulking member 28 from the outer peripheral side. Is attached to the tube 21 in a watertight manner. When the tube 21 is made of a material having a restoring force from the extending direction, such as silicone rubber, the outer diameter of the seal cap 21 is made smaller than the inner diameter of the tube 22, so that the water tightness with the seal cap 22 is increased by the restoring force of the tube 21. Is effective.

The tube 21 that is the bundling portion 10 has a waterproof structure, and the tube 21 that is the bundling portion 10 is watertightly attached to the seal cap 22 that forms the waterproof portion 23, so that the small-diameter coaxial cable 12 in the bundling portion 10 has water. It does not penetrate.
Since the bundling portion 10 is cylindrical, the outer shape thereof is constant, and the surface unevenness is small (can be several tens of μm or less), so there is a gap at the connection location between the bundling portion 10 and the waterproof portion 23. It cannot be done, and both can be connected in a watertight manner.

The thin coaxial cable harness 11 having the above structure is inserted into the first housing 1 with the connector 13 at the end thereof inserted into the cable insertion hole 5 of the first housing 1. Further, a seal cap 22 and an O-ring 26 that constitute the waterproof portion 23 are fitted in a concave portion 7 formed in the end surface of the first housing 1 and having a circular shape in plan view.
By making the inner diameter of the inner peripheral surface 7a of the recess 7 smaller than the outer diameter of the O-ring 26 and fitting the O-ring there, the O-ring 26 comes into close contact with the inner peripheral surface 7a of the recess 7 and the seal cap 22. The space between the first housing 1 and the seal cap 22 is made watertight.

  The surface of the flange portion 25 of the seal cap 22 opposite to the cylindrical portion 27 is adhered and fixed to the first housing 1 or the second housing 2 with an adhesive 29. Thereby, in addition to the O-ring 26, waterproofness can be further improved. The adhesive 29 is desirably waterproof. For example, when the tube 21 is transparent, an ultraviolet curable resin is disposed between the tube 21 and the seal cap 22 and irradiation with ultraviolet rays from the outside of the tube 21 makes it possible to obtain a watertight bond in a short time. Become. A resin or a double-sided adhesive tape can be used for the adhesive 29, and a waterproof adhesive is desirable.

In the second housing 2 as well, the connector 13 at the end of the small coaxial cable harness 11 is inserted through the cable insertion hole 6 of the second housing 2 in the same manner as described above. A seal cap 22 and an O-ring 26 that constitute the waterproof portion 23 are fitted in a circular recess 8 formed on the end surface of the circular plate in plan view.
The outer peripheral surface of the flange portion 25 of the seal cap 22 and the inner peripheral surface 8a of the recess 8 are kept watertight by the O-ring 26.

  In order to manufacture the thin coaxial cable harness 11 having the waterproof structure having the waterproof portion 23 as described above, first, the thin coaxial cable harness 11 having the connectors 13 connected to both ends (in the state shown in FIG. 2). ) Is inserted through the tube 21.

  Thereafter, the seal cap 22 is inserted into the small-diameter coaxial cable harness 11 from both ends, and the seal cap 22 and the tube 21 are caulked with a caulking member 28 to be connected. Further, an O-ring 26 is attached to the outer periphery of the flange portion 25 of the seal cap 22 to constitute the waterproof portion 23.

  As described above, when the connector 13 is first attached to the end of the small-diameter coaxial cable 12 and the connector 13 is passed through the tube 21 and the seal cap 22, the connector 13 is inserted through the inner diameter of the tube 21 and the seal cap 22. The size is such that When it is difficult to insert the connector 13 through the tube 21 or the seal cap 22, the small-diameter coaxial cable 12 is inserted into the tube 21 or the seal cap 22, and then the connector 13 is attached to the end of the small-diameter coaxial cable 12. Good.

  The small-diameter coaxial cable harness 11 to which the waterproof part 23 is attached is attached to the first housing 1 and the second housing 2 constituting the mobile phone terminal 3 as follows. The connector 13 is inserted into the insertion hole 5 or 6 of the first casing 1 or the second casing 2 and is inserted into the casing. A seal cap 22 having an O-ring 26 attached to the outer periphery of the flange 25 is fitted into the recess 7 of the first casing 1 or the recess 8 of the second casing. Both are watertight by an O-ring 26.

Since the bundling portion 10 and the waterproof portion 23 have a waterproof structure, and the waterproof portion 23 is attached to the first housing 1 and the second housing 2 in a watertight manner, the first housing 1 and the second housing 2 During this period, water does not enter the first housing 1 or the second housing 2 through the thin coaxial cable harness, and the thin coaxial cable harness 11 of this embodiment exhibits a waterproof function.
Accordingly, the first casing 1 and the second casing 2 can be easily connected to each other by the small-diameter coaxial cable harness 11 that can reduce the bending radius while obtaining good waterproof properties and is advantageous for repeated bending. be able to. Moreover, since the thin coaxial cable 12 has good shielding properties and excellent noise characteristics, stable signal transmission can be performed.

  The small coaxial cable harness 11 can be easily connected to the wiring boards in the first housing 1 and the second housing 2 by the connectors 13 at both ends.

  In the above embodiment, the end portion of the tube 21 is fastened and connected to the cylindrical portion 27 of the seal cap 22 by the metal caulking member 28. However, the caulking member 28 is formed from a heat-shrinkable resin (for example, polyolefin). The end portion of the tube 21 and the cylindrical portion 27 of the seal cap 22 may be connected in a watertight manner by thermally shrinking the caulking member 28. Further, the end portion of the tube 21 and the cylindrical portion 27 of the seal cap 22 may be connected in a watertight manner by being bound by a caulking member 28 made of a band.

  Alternatively, the end portion of the tube 21 may be press-fitted into the cylindrical portion 27 of the seal cap 22, the tube 21 may be brought into close contact with the inner periphery of the seal cap 22, and the seal cap 22 and the tube 21 may be connected in a watertight manner. When the tube 21 is made of a material having a restoring force from the extending direction, such as silicone rubber, it is effective that the tube 21 can be watertight by the restoring force of the tube 21.

The tube 21 itself is formed from a heat-shrinkable resin (for example, polyolefin), and after the cylindrical portion 27 of the seal cap 22 is fitted to both ends of the tube 21, at least both ends of the tube 21 are heat-shrinked. The end portion 21 and the cylindrical portion 27 of the seal cap 22 may be connected in a watertight manner.
Further, the thin coaxial cable harness 11 may be bundled at its intermediate portion by, for example, a braided sleeve in which monofilament fibers are knitted into a cylindrical shape, or bundled by winding a bundle tape or yarn spirally. The smooth insertion work into the waterproof tube 12 can be achieved.

  In the above embodiment, the small-diameter coaxial cable harness 11 is inserted into the tube 21 and the bundling portion 10 between the seal caps 22 is waterproofed. However, a waterproof material other than the tube 21 may be used. For example, a waterproof material such as a water-repellent tape or a fluororesin tape may be wound around in a spiral manner while overlapping a part of the width, thereby forming a waterproof material.

  Further, the bundling portion 10 between the seal caps 22 is not waterproofed, and the inner peripheral side of the seal cap 22 is filled with an adhesive so that the seal cap 22 and the bundling portion 10 are integrated, and the seal cap 22 is inserted. The gap between the thin coaxial cables 12 in the hole 24 may be filled with an adhesive so that water does not enter the housing from the portion where the thin coaxial cable harness 11 is introduced into the housing. As the adhesive, a humidity curable resin, a thermosetting resin, or an ultraviolet curable resin can be used.

Further, as the thin coaxial cable harness 11, a connector 13 may be retrofitted. That is, the thin coaxial cable harness 11 before the connector 13 is attached may be passed through the waterproof tube 21 and the seal cap 22, and then the connector 13 may be attached to both ends.
The present invention can also be applied to the case where the small-diameter coaxial cable 12 of the small-diameter coaxial cable harness 11 is connected to the circuit board directly or via an FPC without mounting the connector 13. Inserting the end of the small-diameter coaxial cable harness 11 into the housing through the insertion hole of the housing is the same as described above.

  In the above-described embodiment, the structure in which the small-diameter coaxial cable harness 11 is inserted into the communication hole 4a of the hinge 4 has been described as an example. However, the present invention can also be applied to a structure that does not pass through the communication hole 4a of the hinge 4.

  Note that the adhesive 29 is not necessarily provided, and even in this case, the seal cap 22 and the first casing 1 and the second casing 2 can be sealed by the O-ring 26.

It is the perspective view seen from the connection side which shows the structure of a mobile telephone terminal. It is a top view which shows the example of embodiment which concerns on the small diameter coaxial cable harness of this invention. It is sectional drawing explaining the connection structure by the small diameter coaxial cable harness of FIG. It is a perspective view which shows the waterproof tube and seal cap with which the small diameter coaxial cable harness of FIG. 2 is mounted | worn.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 1st housing | casing, 2 ... 2nd housing | casing, 10 ... Bundling part, 11 ... Thin coaxial cable harness, 12 ... Thin coaxial cable, 13 ... Connector, 21 ... Tube (bundling part, waterproof tube), 22 ... seal cap, 23 ... waterproof part, 24 ... insertion hole.

The present invention relates to a thin coaxial cable harness formed by bundling a plurality of thin coaxial cables and a thin coaxial cable connection structure .

Accordingly, the present invention provides a thin coaxial cable harness and a thin coaxial cable connection structure that can connect the housings while obtaining good waterproof properties, and have excellent bending radius and durability against repeated bending. The purpose is to do.

A thin coaxial cable harness according to the present invention that can solve the above-mentioned problems is a thin coaxial cable harness that connects two casings in which a plurality of thin coaxial cables are bundled and the positional relationship can change. And
The bundling portion for bundling the thin coaxial cable is made of a waterproof tube,
The waterproof part attached to the introduction portion of the thin coaxial cable harness to the housing is composed of a seal cap and an O-ring,
The seal cap has a flange portion extending radially outward and a cylindrical portion extending from one surface side of the flange portion,
The O-ring is attached to the outer periphery of the flange portion,
The space between the waterproof portions is covered with the waterproof tube, the cylindrical portion is inserted into the waterproof tube, or the waterproof tube is press-fitted into the cylindrical portion, and the waterproof tube and the waterproof portion are attached in a watertight manner. It is characterized by being.

Waterproof tube may be made of a fluorine resin, a polyolefin and silicone rubber of soft resin. The waterproof tube may be a porous body made of these materials as long as waterproofness is maintained.

In the thin coaxial cable harness of the present invention, it is preferable that connectors are attached to both ends or one end of the coaxial cable harness.
Further, the thin coaxial cable connection structure according to the present invention is a thin coaxial cable connection structure in which the thin coaxial cable harness of the present invention is connected to the two housings,
The casing and the waterproof part are connected in a watertight manner by fitting the seal cap together with the O-ring into a circular recess formed in an end surface of the casing in a plan view.

Hereinafter, an example of an embodiment of a thin coaxial cable harness and a thin coaxial cable connection structure according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, in this embodiment, each of the first casing 1 and the second casing 2 of the mobile phone terminal 3 including the first casing 1 and the second casing 2 is a small coaxial cable. Connected by a harness 11.

The present invention relates to a small-diameter coaxial cable harness formed by bundling a plurality of small-diameter coaxial cables and a casing connected by a small-diameter coaxial cable .

Therefore, the present invention can connect the housings while obtaining a good waterproof property, and is connected with a small-diameter coaxial cable harness and a small- diameter coaxial cable harness excellent in durability against repeated bending and a reduction in the bending radius. The purpose is to provide an open housing .

A thin coaxial cable harness according to the present invention that can solve the above-mentioned problems is a thin coaxial cable harness that connects two casings in which a plurality of thin coaxial cables are bundled and the positional relationship can be changed. And
The bundling portion for bundling the thin coaxial cable is made of a waterproof tube,
The waterproof part attached to the introduction part of the thin coaxial cable harness to the housing is composed of a seal cap and an O-ring,
The seal cap has a flange portion extending radially outward and a cylindrical portion extending from one surface side of the flange portion,
The O-ring is attached to the outer periphery of the flange portion,
The waterproof portion is covered with the waterproof tube, the cylindrical portion is inserted into the waterproof tube, or the waterproof tube is press-fitted into the cylindrical portion, and the seal cap is bonded to the housing with an adhesive. The waterproof tube and the waterproof part are attached in a watertight manner.

In the thin coaxial cable harness of the present invention, it is preferable that connectors are attached to both ends or one end of the coaxial cable harness.
Further, in the case connected by the small coaxial cable harness according to the present invention, the seal cap is fitted together with the O-ring in a circular recess in plan view formed on the end surface of the case , and the seal cap is bonded. the Rukoto is bonded to the housing by wood, the housing and said waterproof portion is connected in a watertight manner.

Hereinafter, examples of embodiments of a thin coaxial cable harness and a casing connected by a thin coaxial cable harness according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, in this embodiment, each of the first casing 1 and the second casing 2 of the mobile phone terminal 3 including the first casing 1 and the second casing 2 is a small coaxial cable. Connected by a harness 11.

Claims (5)

A small-diameter coaxial cable harness that connects two housings in which a plurality of small-diameter coaxial cables are bundled and the positional relationship may change,
The bundling portion for bundling the small-diameter coaxial cable has a cylindrical shape,
A small-diameter coaxial cable harness, wherein a waterproof part is attached to the bundling part in a water-tight manner at a place where the small-diameter coaxial cable harness is attached to the introduction part to the housing. The thin coaxial cable harness according to claim 1,
The small-diameter coaxial cable harness characterized in that the bundling portion is made of a waterproof tube, a space between the waterproof portions is covered with the waterproof tube, and an end of the waterproof tube is connected to the waterproof portion in a watertight manner. The thin coaxial cable harness according to claim 2,
The small-diameter coaxial cable harness, wherein the waterproof tube and the waterproof part are watertightly attached by caulking with a metal or heat-shrinkable resin. The thin coaxial cable harness according to claim 2,
A thin coaxial cable harness, wherein the waterproof tube is watertightly attached by being press-fitted into the waterproof part. The thin coaxial cable harness according to any one of claims 1 to 4,
A small-diameter coaxial cable harness, wherein connectors are attached to both ends or one end of the coaxial cable harness.

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