WO2011142025A1 - 複合ハーネス及びその製造方法 - Google Patents
複合ハーネス及びその製造方法 Download PDFInfo
- Publication number
- WO2011142025A1 WO2011142025A1 PCT/JP2010/058163 JP2010058163W WO2011142025A1 WO 2011142025 A1 WO2011142025 A1 WO 2011142025A1 JP 2010058163 W JP2010058163 W JP 2010058163W WO 2011142025 A1 WO2011142025 A1 WO 2011142025A1
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- WIPO (PCT)
- Prior art keywords
- optical fiber
- composite harness
- optical
- composite
- thin
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4292—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements
- G02B6/4293—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements hybrid electrical and optical connections for transmitting electrical and optical signals
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/30—Optical coupling means for use between fibre and thin-film device
Definitions
- the present invention relates to a composite harness having a thin wire and an optical fiber and a method for manufacturing the same.
- an extremely thin coaxial cable is used for connection between the device main body and the liquid crystal display unit, wiring in the device, and the like. They are used as a coaxial cable harness in which a plurality of coaxial cables are integrated and integrated because of the ease of wiring (for example, see Patent Document 1).
- a photoelectric composite wiring module has been developed in which the electrical wiring is arranged in a separated region that is not stacked with the optical circuit portion (see, for example, Patent Document 2).
- JP 2005-235690 A Japanese patent publication: Japanese Patent Application Laid-Open No. 2008-159766
- An object of the present invention is a composite harness that can be accommodated in a narrow accommodating space, can increase the communication speed without being affected by noise, and is less likely to cause an increase in transmission loss or fatigue fracture even when subjected to bending or twisting. And a manufacturing method thereof.
- the composite harness of the present invention capable of solving the above-described problems has a plurality of small-diameter electric wires and at least one optical fiber, and the portions other than the small-diameter electric wires and the end portions of the optical fibers are bundled.
- the optical fiber is arranged in the outermost layer in the bundle portion.
- the thin wire is arranged in parallel at the end of the composite harness and the optical fiber is arranged at the end of the array of the thin wire.
- the plurality of small diameter electric wires include a small diameter coaxial cable.
- the composite harness according to the present invention includes a connection member to which the small-diameter electric wire and the end of the optical fiber are connected, and an optical component to which the optical fiber is connected is mounted on the connection member. It is preferable that the direction in which the optical fibers are connected is a direction that intersects the direction in which the thin-diameter electric wires are arranged on the connection member.
- the optical fiber is wound around the bundle portion along the outer periphery of the bundled small-diameter electric wires.
- the direction in which the thin wires are arranged on the connection member and the direction of the thin wires in the portion where the thin wires are bundled can be substantially orthogonal. .
- the direction in which the thin electric wires are arranged on the connecting member and the direction of the thin electric wires at the portion where the thin electric wires are bundled can be substantially parallel.
- connection member is connectable to a connected portion, and a connection direction with respect to the connected portion is a direction along a surface along which the thin-diameter electric wires are arranged in the connection member. can do.
- connection member can be connected to the connected portion, and the connection direction with respect to the connected portion can be a direction orthogonal to the surface on which the thin-diameter electric wires are arranged in the connecting member.
- the connecting member is provided with a relay member made of an anisotropic conductive film or an interposer on a surface where the thin-diameter electric wire or the optical fiber is connected to the connecting member or on the back surface thereof.
- the optical component includes a photoelectric conversion element connected to an electrode of the photoelectric ferrule and the photoelectric ferrule, A housing part is formed in the connection member, The photoelectric ferrule and the photoelectric conversion element are accommodated in the accommodating portion, An electrical connection formed in the housing is connected to the electrode;
- the connection member has a connection terminal connectable to the connected portion, It is preferable that the electrical connection portion is electrically connected to the connection terminal.
- the photoelectric conversion element is connected to the electrode in the direction of the optical axis of the photoelectric ferrule,
- the electrode is formed to extend to the side surface of the photoelectric ferrule,
- the electrical connection portion may be formed on the bottom surface of the housing portion and connected to the electrode on the side surface.
- the photoelectric conversion element is connected to the electrode in the direction of the optical axis of the photoelectric ferrule
- the electrical connection portion may be formed to project in the direction of the optical axis of the photoelectric ferrule and be connected to the electrode.
- the accommodating portion also accommodates a part of the optical fiber,
- the resin filled in the gap between the housing portion and the optical component is different from the resin filled in the gap between the housing portion and the optical fiber, It is preferable that the resin filled around the optical fiber has elasticity.
- the electrical connection portion has a spring property, It is preferable that the optoelectric ferrule is pressed by the electrical connection portion in the housing portion, is locked by a locking portion formed in the housing portion, and is detachably positioned in the housing portion.
- the method for manufacturing a composite harness according to the present invention is a method for manufacturing the composite harness of the present invention,
- the plurality of small-diameter electric wires and the optical fiber are bundled by arranging the optical fiber in an outermost layer.
- the ends of the plurality of small-diameter wires are terminated and connected to a connection member, and the ends of the optical fiber are terminated and light on the connection member is It is preferable to connect to the member, and to cross the direction in which the small-diameter electric wires are arranged by the connecting member and the direction to connect the optical fiber to the connecting member.
- the composite harness of the present invention and the composite harness manufactured by the manufacturing method of the present invention use at least one optical fiber, an increase in the number of wires is suppressed when performing high-speed serial transmission, and a narrow accommodation space Can be stored.
- the optical fiber does not receive noise due to surrounding electromagnetic waves, communication speed can be increased.
- the optical fiber Since the optical fiber is arranged in the outermost layer in the bundle portion, even if the bundle portion is deformed (curved or twisted), the side pressure applied to the optical fiber is suppressed as much as possible without the small-diameter wire pushing the optical fiber. Thereby, it is possible to avoid stress concentration on an optical fiber having higher bending rigidity and different mechanical characteristics as compared with a thin wire.
- the optical fiber does not jump out of the bundle and kinks (breaks). Therefore, an increase in transmission loss and fatigue breakage in the optical fiber can be prevented.
- FIG. 1 It is a top view which shows the example of embodiment which concerns on the composite harness of this invention. It is a top view of the composite harness before bundling with a bundling member. It is sectional drawing in the bundle part of a composite harness. It is a schematic plan view which shows the connection state in the connector of a composite harness. It is a schematic block diagram of the optical transmission line using an optical fiber.
- (A) is a top view which shows the connection state of the composite harness to an upper and lower board
- (A) is a top view which shows the state which accumulated the upper and lower board
- FIG. 1 It is a schematic perspective view which shows the attachment structure to a board
- the composite harness 20 includes a plurality (several to several tens) of small-diameter coaxial cables 24 and at least one (in this embodiment, one) optical fiber 25, and an array
- An intermediate portion excluding the portions 21a and 21b is a bundle portion 26 in which a plurality of small-diameter coaxial cables 24 and optical fibers 25 are bundled.
- the small-diameter coaxial cable 24 is configured to have a center conductor, an inner insulator, an outer conductor, and a jacket from the center to the outer side in a radial section perpendicular to the center axis. Terminal processing is performed, and the outer conductor, the inner insulator, and the center conductor are exposed step by step in a predetermined length.
- the thin wire of the present invention may be a thin insulated wire having no external conductor in addition to the thin coaxial cable 24.
- the composite harness 20 may include a thin coaxial cable and a thin coaxial cable.
- the small-diameter coaxial cable 24 for example, it is desirable to use a coaxial cable thinner than the AWG 42 based on the AWG (American Wire Gauge) standard or a coaxial cable whose outer diameter is thinner than 0.30 mm. Thereby, the thin coaxial cable harness 20 can be easily bent.
- the number of thin wires included in the composite harness 20 can be several to several tens.
- the coaxial cable When comparing an electric circuit such as an FPC with a small-diameter coaxial cable, the coaxial cable has the advantage of better shielding characteristics and less crosstalk. In addition, coaxial cables are easier to bundle as a bundle, and even when a hinge with a smaller inner diameter is passed through the inside of the hinge, it can be passed.
- the optical fiber 25 is configured, for example, by covering a glass fiber made of a core and a clad with a jacket.
- the optical fiber 25 may have a core diameter of 0.008 to 0.06 mm, a cladding diameter of 0.08 to 0.125 mm, and a jacket diameter of 0.18 to 0.25 mm.
- a terminal treatment for exposing the glass fiber is performed at the end, and the glass fiber portion is inserted into the optical component.
- the optical fiber 25 is longer than any one of the plurality of small-diameter coaxial cables 24.
- one optical fiber 25 is provided, but this optical fiber 25 may be provided with several fewer than the thin coaxial cable 24.
- the optical fiber is more suitable for wiring that is bent or twisted.
- the use of the planar waveguide is limited to those in which the wiring shape is close to a straight line. It is preferable to combine the optical fiber and the thin wire with the same diameter.
- the optical fiber 25 may be a plastic clad optical fiber or a plastic optical fiber.
- signals that require high-speed communication are propagated using optical fibers.
- Signals and power that do not require much communication speed are propagated using thin wires.
- Insulated wires may be used for low-speed signals.
- An insulated wire can also be used as the power line.
- Bundle members 27 such as tapes or sleeves are used to bundle the intermediate portion into the bundle portion 26.
- the bundled member 27 made of tape is wound around the thin coaxial cable 24 and the optical fiber 25, or the thin coaxial cable 24 and the optical fiber 25 are passed through the bundled member 27 made of a sleeve, so that the thin coaxial cable 24 and the optical fiber 25 are passed.
- Fibers 25 are bundled.
- an adhesive tape may be wound around both ends of the wound tape.
- a fluororesin tape such as polyethylene tape, PET (polyethylene terephthalate) tape, PTFE (polytetrafluoroethylene), or the like can be used.
- a braided or knitted synthetic fiber such as PET or liquid crystal polymer can be used. If a bundling member using a metal tape or a metal thread is used, the shielding effect of a thin wire can be obtained. If necessary, a ground connection member may be used so that grounding is obtained at a predetermined portion.
- the optical fiber 25 is disposed in the outermost layer of the bundle.
- the shape to be bundled may be an unspecified shape as long as a plurality of small-diameter coaxial cables 24 and optical fibers 25 are bundled together.
- the bundle member 27 may be bundled with a predetermined length by one, or may be divided into a plurality of pieces in the length direction and bundled at a plurality of locations.
- the small-diameter coaxial cable 24 and the optical fiber 25 that are bundled together are loosely bundled so that their positions are not interchanged.
- the number of small-diameter wires is 10 to 20, and when one or two optical fibers are used, the bundle diameter can be 2 mm or less.
- the plurality of small coaxial cables 24 and the optical fibers 25 are arranged at a predetermined pitch in the arrangement portions 21a and 21b and arranged in parallel in a flat shape, and connectors 31 and 32 which are a kind of connection member are connected thereto.
- each line is paralleled so that it may extend as it is from a bundle part.
- the direction of the bundle portion 26 is substantially perpendicular to the width direction of the connector 31 (the direction in which the thin coaxial cables 24 are arranged).
- This connection is called a T-shaped connection.
- the small-diameter coaxial cable 24 connected to the connector 32 extends from the bundle portion and is bent by about 90 °, and is connected in parallel to the connector 32.
- the width direction of the connector 32 is substantially parallel to the direction of the bundle portion. This connection is called an L-shaped connection.
- the optical fiber 25 is disposed at the end of the arrangement of the small-diameter coaxial cables 24 in the connection portion to the connector.
- the optical fiber 25 in order to suppress bending stress to the optical fiber 25, it is desirable to dispose the optical fiber 25 at the outer end having a large curvature radius. 1 and 2, an example is shown in which one is a T-shaped connection and the other is an L-shaped connection, but both may be a T-shaped connection, or both may be an L-shaped connection.
- an extra length can be formed in the optical fiber near the connecting portion, so that when the bending or twisting occurs near the connecting portion, the excessive pulling force does not reach the optical fiber or the connecting portion and transmission loss. There is no risk of increase or damage.
- FIG. 5 shows an optical transmission line using the optical fiber 25.
- the optical transmission path includes an optical fiber 25 and optical components 55 and 55A provided at both ends of the optical fiber 25.
- the optical component 55 on the light transmission side includes a ferrule 61, a photoelectric conversion element 62, and an electric component 63.
- the light receiving side optical component 55A includes a ferrule 61A, a photoelectric conversion element 62A, and an electric component 63A.
- An optical fiber 25 is bent and connected to the optical components 55 and 55A in the depth direction of FIG.
- the ferrules 61 and 61A are made of a material containing any of polyester resin, PPS resin, and epoxy resin, and are formed with insertion holes 61a and 61Aa into which the ends of the optical fiber 25 are inserted.
- the ferrules 61 and 61A have photoelectric conversion elements 62 and 62A attached to end faces 61b and 61Ab on the front side in the insertion direction of the optical fiber 25 into the insertion holes 61a and 61Aa (direction in which the optical fiber is connected).
- the optical axes of the optical fiber 25 and the photoelectric conversion elements 62 and 62A are linearly arranged. Since the ferrules 61 and 61A and the photoelectric conversion elements 62 and 62A are directly connected, the height and length of both can be minimized, and the dimensions of the connecting portion can be reduced. Therefore, the size of the connector can be reduced.
- a VCSEL Vertical Cavity Surface Emitting Laser
- PD Photodiode
- the electrical component 63 on the light transmission side a driver IC that drives the VCSEL is used, and as the electrical component 63A on the light reception side, a transimpedance amplifier (TIA) that amplifies a signal from the PD is used. By placing the TIA as close as possible to the PD, the signal from the PD can be amplified before it is attenuated.
- Each component in the optical components 55 and 55A is connected by a printed wiring circuit. As a result, the optical components on the wiring board can be densely arranged to reduce the size of the connection portion. Therefore, the size of the connector can be reduced.
- the electronic signal of the data filed by the data converter 64 made of a serializer is converted into an optical signal by the photoelectric conversion element 62 on the light transmission side made of VCSEL, and the optical signal is optical fiber. 25.
- the optical signal is converted into an electric signal by the photoelectric conversion element 62A made of PD, and the electric signal is returned to the original data format by the data converter 64A made of a deserializer.
- the small-diameter coaxial cable 24 is arranged and connected substantially perpendicularly to the width (longitudinal) direction of the connectors 31 and 32, the center conductor 24a is soldered to the contact point 41, and the external conductor 24b is connected to the ground bar. 49 is fixed.
- the optical fiber 25 is arranged in a direction different from the direction of the small-diameter coaxial cable 24 at the connection portion.
- the arrangement direction of the optical fibers 25 in the connectors 31 and 32 only needs to be a direction intersecting with the direction in which the thin coaxial cable 24 is connected. You may do it.
- the optical fiber 25 is disposed obliquely with respect to the width direction of the connectors 31 and 32, and is inserted into and connected to the ferrule of the optical component 55.
- the optical fiber 25 When the optical fiber 25 is arranged at the end of the small-diameter coaxial cable, the optical fiber 25 extends obliquely from the bundle portion regardless of the T-shaped connection or the L-shaped connection.
- the optical fiber 25 When the optical fiber 25 is inclined, it is preferable to connect the optical fiber 25 to the connector so that the angle of the optical fiber with respect to the width direction of the connector is 30 to 60 degrees.
- the connectors 31 and 32 may be of a type in which the thin coaxial cable 24 and the optical fiber 25 are arranged in a horizontal row and connected, or may be a type of connecting in a plurality of stages.
- the composite harness 20 connects the two boards 11 and 12 that are arranged one above the other and move horizontally in the front-back direction (the left-right direction in FIGS. 6 and 7).
- the substrates 11 and 12 are each incorporated in a relatively sliding housing of a device such as a mobile phone.
- the composite harness 20 is connected and wired to both the boards 11 and 12 as a U-shape (or J-shape) in the plan view direction of the boards 11 and 12.
- 6 shows a state in which both end portions 21a and 21b of the composite harness 20 are farthest away
- FIG. 7 shows a state in which both end portions 21a and 21b are closest.
- the horizontal movement distance of the substrates 11 and 12 is, for example, about 30 mm to 60 mm.
- the composite harness 20 is curved in the width direction of the substrates 11 and 12 (in the direction of the double-headed arrow W in FIG. 6A) as seen in a plan view. Since the widths of the substrates 11 and 12 are several centimeters, a sufficient bending diameter in this direction can be ensured. For example, as shown in FIG. 6A, if one end 21a of the composite harness 20 is connected to the right side (upper side in FIG. 6A) of the upper substrate 11 in the sliding direction, the other end The end 21b is connected to the left side of the lower substrate 12 (the lower side in FIG. 6A) with respect to the sliding direction.
- the composite harness 20 is bent in a U-shape, but in order to reduce the space for housing the composite harness 20, it is better that the U-shaped width (interval between straight portions) is narrower.
- the optical fiber 25 is arranged on the outer peripheral side of the curve of the composite harness 20 to increase the radius of curvature as much as possible to reduce bending stress.
- the composite harness 20 In order to manufacture the composite harness 20 described above, a plurality of small-diameter coaxial cables 24 and an optical fiber 25 longer than these small-diameter coaxial cables 24 are prepared. Next, the optical fiber 25 is disposed on the outermost layer with respect to the thin coaxial cable 24.
- the terminals of the small-diameter coaxial cables 24 are arranged in parallel, and the optical fiber 25 is arranged at the end of the arrangement of the small-diameter coaxial cables 24.
- the external conductor 24b is exposed from the end of the thin coaxial cable 24 while the arrangement of the thin coaxial cable 24 is held by a film, a jig or the like, and the external conductor 24b is soldered to the ground bar 49. Fix them together.
- the insulator and the central conductor 24a are exposed from the tip of the outer conductor 24b.
- the center conductor 24 a is soldered to the contact 41 of the connectors 31 and 32.
- the pitch of the contacts 41 or the center conductor can be 0.3 to 0.5 mm.
- the ground bar 49 is connected to the connector ground or shell. Assemble the connector and finish the termination process.
- the outer conductor of each wire is fixed to the ground bar to expose the insulator and the center conductor, and the termination process is completed by covering the center conductor with a protective member as necessary.
- the portions other than the ends of the small-diameter coaxial cable 24 and the optical fiber 25 are bundled by a bundle member 27 such as a tape or a sleeve to form a bundle portion 26.
- the optical fiber is disposed in the outermost layer. It is also possible to terminate the small-diameter coaxial cable 24 after forming the bundle portion 26 first.
- the optical fiber 25 exposes the glass fiber, and is inserted into the ferrule of the optical component 55 and fixed. Accordingly, the composite harness 20 in which the intermediate portion is the bundle portion 26 and the optical fiber 25 is disposed in the outermost layer by the bundle portion 26 is obtained.
- the thin coaxial cable 24 is divided into two groups with the optical fiber 25 as a boundary during the termination process of the thin coaxial cable 24. It will be divided.
- the optical fiber 25 is disposed in the outermost layer and disposed at the ends at both end portions 21a and 21b, the small-diameter coaxial cables 24 can be terminated together, and the labor of the operation can be reduced. Can be reduced. In addition, the extra length of the optical fiber 25 can be easily obtained.
- the composite harness 20 is bundled with a plurality of small-diameter coaxial cables 24 and an intermediate portion of at least one optical fiber 25. Since the optical fiber 25 is used, the number of small-diameter coaxial cables is not increased, and the optical fiber 25 can be accommodated in a narrow accommodation space, and communication speed can be increased.
- the thin coaxial cable 24 pushes the optical fiber 25 when the composite harness 20 is bent or twisted.
- the application of lateral pressure to the optical fiber 25 is suppressed as much as possible. Thereby, it is possible to avoid stress concentration on the optical fiber 25 having higher bending rigidity and different mechanical characteristics as compared with the thin coaxial cable 24. Therefore, the transmission loss of the optical fiber does not increase and fatigue fracture can be prevented.
- optical fiber 25 is disposed obliquely toward the outside of the connector, excessive bending does not occur at the connection ends of the optical fibers 25 in the connectors 31 and 32. Therefore, transmission loss due to bending stress of the optical fiber 25 can be eliminated.
- the optical fiber 25 is longer than all the small-diameter coaxial cables 24.
- the extra length of the optical fiber (the length that is longer than the thin wire) is set to 2 to 10% of the length of the harness.
- the case where the connectors 31 and 32 are attached to the end portions 21a and 21b of the composite harness 20 and terminated is described.
- the thin coaxial cable 24 and the optical fiber 25 of the composite harness 20 are formed on the substrate. It is also possible to perform termination processing by directly attaching to 11 and 12.
- the thin coaxial cable 24 and the optical fiber 25 are directly attached to the substrates 11 and 12, the thin coaxial cable 24 arranged in parallel and the end of the optical fiber 25 arranged at the end thereof are connected to the substrates 11 and 12. Temporarily fix with film.
- the composite harness 20 may be configured by connecting to a wiring board member 72 made of an FPC board or a hard board instead of the connectors 31 and 32.
- the wiring board material 72 made of the FPC board or the hard board is attached to the boards 11 and 12.
- the connection terminal 41 is electrically connected to the back surface of the wiring board material 72 and can be connected to the substrates 11 and 12.
- relay member 73 such as an anisotropic conductive film (ACF) or an interposer having adhesiveness on the surface to which the composite harness of the wiring board material 72 is connected or the back surface thereof, by heating or pressurizing, It is preferable to connect the connection terminal 41 of the wiring board material 72 to the substrates 11 and 12 via the relay member 73. Thereby, the thickness dimension and the depth dimension of the wiring board material 72 can be suppressed, respectively, and further downsizing can be achieved.
- ACF anisotropic conductive film
- FIG. 9 A modification of the present embodiment is shown in FIG.
- a plurality of small coaxial cables 24 are bundled, and the optical fiber 25 is wound around the outer circumference of the bundled small coaxial cables 24 so as not to cause transmission loss due to bending (
- the winding pitch is 10 to 40 mm
- the periphery thereof is bundled by a bundling member 27 (not shown in FIG. 9).
- the optical fiber 25 can be inevitably made longer than the thin coaxial cable 24 by winding the optical fiber 25 around the bundled thin coaxial cable 24. Therefore, pulling of the optical fiber 25 due to bending can be suppressed as much as possible, and transmission loss due to tensile stress can be eliminated.
- the composite harness 20 can be used by being incorporated in a device such as a mobile phone in which the ends of the housing are rotatably connected by hinges.
- a device such as a mobile phone in which the ends of the housing are rotatably connected by hinges.
- the end portions of the first housing 1 and the second housing 2 are rotatably connected by the 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 both ends of the composite harness 20 are respectively connected from the cable insertion holes 5 and 6.
- a communication hole 4a is formed in the hinge 4, and the composite harness 20 is inserted into the communication hole 4a.
- the optical fiber is arranged in the outermost layer in the bundle portion of the composite harness 20, even if the bundle portion is deformed (curved or twisted), the small-diameter electric wire is added to the optical fiber without pushing the optical fiber. Side pressure is minimized. Accordingly, the composite harness 20 can be passed through the narrow hinge 4 without causing damage, and an increase in transmission loss and fatigue breakage in the optical fiber can be prevented, and the substrate and the second housing included in the first housing 1 can be prevented. The included substrate can be connected by the composite harness 20 to increase the communication speed by optical fiber.
- the optical fiber is longer than any of the electric wires and 2% longer than the design length on the drawing.
- a connector is attached to both ends of the 20 small-diameter coaxial cables of the AWG 46 and the central portion of the thin-diameter electric wires is bundled. Thereafter, the optical fiber is attached to the bundle of small-diameter electric wires.
- an optical fiber is attached to a portion that is often outside. For example, when the composite harness 20 is bent leftward in FIG. 1, an optical fiber is attached to the right side of the bundle.
- a bundle member which is a PTFE tape is wound to form a bundle portion 26, and a PET tape with an adhesive is wound around both ends thereof so that the PTFE tape cannot be unwound.
- Both ends of the optical fiber 25 are inserted into ferrules, and the ferrules are placed on predetermined positions of the connectors 31 and 32 and fixed.
- the attachment angle of the ferrule with respect to the width direction of the connector is 45 degrees.
- the extra length of the optical fiber is absorbed by the bundle portion 26, the array portion 21a, and the array portion 21b.
- an optical fiber is not provided with a surplus length and bundled without distinction from other coaxial cables, the optical fiber is taken into the bundle. It occurs with a probability that there is a phenomenon that the electric wire inside the bundle jumps out while the composite harness receives 200,000 twists. When the optical fiber jumps out, it is considered that the transmission loss increases or disconnection occurs and becomes defective.
- the composite harness of the present invention does not cause the optical fiber to jump out and kink, so there is very little risk of increase in transmission loss and fatigue fracture.
- FIG. 11 Another embodiment according to the present invention is shown in FIG.
- the composite harness 20A shown in FIG. 11 has a direction of the thin coaxial cable at the bundle portion 26 (vertical direction in FIG. 11) with respect to the arrangement direction of the thin coaxial cables 24 in the connectors 31 and 32 (left and right direction in FIG. 11).
- the connectors 31 and 32 have a plurality of connection terminals 41 arranged in a connector main body 43.
- the pitch of the connection terminals 41 can be 0.3 to 0.5 mm.
- the connector main body 43 has a cable connection portion 44 to which a plurality of small-diameter coaxial cables 24 are connected and a fiber connection portion 45 to which the optical fiber 25 is connected.
- the cable connecting portion 44 is provided with a cable housing portion 46 in which the respective terminals of the small-diameter coaxial cable 24 subjected to terminal processing are housed and connected.
- a plurality of contacts 47 extending from the connection terminals 41 are arranged in the cable housing portion 46, and the center conductor 24a of the small-diameter coaxial cable 24 is soldered to the contacts 47.
- the cable connecting portion 44 is formed with an outer conductor fixing portion 48 to which the ground bar 49 is attached.
- the outer conductor 24b of the small-diameter coaxial cable 24 is disposed and fixed to the outer conductor fixing portion 48 via the ground bar 49.
- the fiber connection part 45 of the connector main body 43 is provided with a wiring board accommodating part 52 that can accommodate a wiring board 51 made of an FPC board.
- a plurality of contacts 47 extending from the connection terminals 41 are also arranged in the wiring board housing portion 52, and the wiring board 51 is housed in the wiring board housing portion 52, so that the contact 53 of the wiring board 51 becomes the contact 47. And conducted. Ten or more contacts 47 are required for one optical fiber.
- An optical component 55 is mounted on the wiring board 51, and the optical fiber 25 is connected to the optical component 55.
- the fiber connecting portion 45 is formed with an introduction groove 56 that is curved in an arc shape in plan view, and the optical fiber 25 connected to the optical component 55 is disposed in the introduction groove 56.
- the optical fiber 25 is guided substantially perpendicular to the length direction of the connector up to the connector 31, but is curved along the introduction groove 56, and the direction connecting to the optical component 55 is the wiring direction on the thin coaxial cable 24 connector 43. Will intersect.
- the angle formed by the connecting direction of the optical fiber 25 and the arrangement direction of the thin electric wires (connector width direction) is preferably 0 to 60 degrees.
- optical transmission line using the optical fiber 25 in the composite harness 20A is the same as that in the composite harness 20 shown in FIG.
- connection parts 42 of the connectors 31 and 32 configured as described above are connected to a receptacle (connected part) 71 provided on the wiring board as shown in FIG.
- the connection direction with respect to the receptacle 71 is a direction along the arrangement surface of the thin coaxial cable 24 and the optical fiber 25. Thereby, the thickness dimensions of the connectors 31 and 32 are suppressed.
- the connecting portion 42 of the connectors 31 and 32 is bent downward as shown in FIG. 15 or bent upward as shown in FIG.
- the direction perpendicular to the arrangement surface of the cable 24 and the optical fiber 25 may be used.
- the depth dimension of the connectors 31 and 32 can be suppressed.
- the optical component 55 is mounted on the upper portion and the connecting portion 42 is bent upward, the optical component 55 is disposed in the dead space, and the bulk of the thickness dimension is minimized. Can be suppressed.
- the dimensions of the connector and the connecting portion in a state where the thin wire and the optical fiber are connected
- the depth is 3 to 5 mm and the height is 1 to 2 mm.
- the width (length in the arrangement direction) depends on the number of lines, but is several mm to several tens of mm.
- This composite harness 20A is also bent and wired by being connected to the two substrates 11 and 12, as shown in FIGS.
- the substrates 11 and 12 are incorporated in, for example, a relatively sliding housing of a device such as a cellular phone, or incorporated in a clamshell cellular phone terminal 3 as shown in FIG. You can also When the substrates 11 and 12 move relatively, bending and twisting are applied to the composite harness 20A.
- the composite harness 20A of the present embodiment does not increase the optical fiber transmission loss and can prevent fatigue fracture.
- the depth dimension of the connectors 31 and 32 can be suppressed as much as possible. Thereby, size reduction of the connectors 31 and 32 can be achieved, and the composite harness 20A can be smoothly passed and wired to the narrow hinge part between housing
- the ground bar 49 is attached to the external conductor fixing portion 48 and soldered to a ground terminal or shell not shown. To do. Further, the center conductor 24 a is soldered to the contact 47 of the connectors 31 and 32.
- the optical fiber 25 is arranged in the outermost layer with respect to the thin coaxial cable 24, and the bundle portion 26 composed of the thin coaxial cable 24 and the optical fiber 25 is bundled by a bundle member 27 such as an adhesive tape or a sleeve.
- the optical fiber 25 exposes a glass fiber having a length necessary for insertion into the ferrule 61 and is inserted into the ferrule 61 of the optical component 55 on the wiring board 51 and fixed.
- the connection direction of the optical fiber 52 to the optical component 55 is set to be a direction intersecting with the arrangement direction of the plurality of small-diameter coaxial cables 24.
- the optical fiber 52 is fitted into the introduction groove 56 of the connectors 31 and 32, and the wiring board 51 is accommodated and fixed to the wiring board accommodating portion 52.
- the optical fiber 25 is wired from the cable connecting portion 44 side of the connectors 31 and 32. However, as shown in FIG. 17, the optical fiber 25 is connected from the end side away from the cable connecting portion 44. You may wire.
- the wiring board material 72 which consists of a FPC board or a hard board
- the connection direction of the wiring board material 72 and the substrates 11 and 12 via the relay member 73 is a direction orthogonal to the arrangement surface of the small-diameter coaxial cable 24 and the optical fiber 25 as in the case shown in FIG. .
- a composite cable 80 including connectors 81 and 82 is shown in FIG.
- this composite cable 80 by bending the small-diameter coaxial cable 24 in the vicinity of the connectors 81 and 82, the bundle portion 26 is wired substantially parallel to the arrangement direction of the small-diameter coaxial cables 24 to be L-shaped. ing.
- the optical fiber 25 is wired from the end side away from the cable connecting portion 44 in the connectors 81 and 82. Since the optical components are mounted along the width direction of the connectors 81 and 82, the depth of the connectors 81 and 82 can be shortened.
- the optical fiber 25 may be wired on the side close to the cable connection portion 44. However, it is preferable that the optical fiber 25 is wired from the end side away from the cable connection portion 44 in that the bending of the optical fiber 25 is small.
- the same effects as those of the composite cables 20 and 20A can be obtained.
- the bundle portions 26 are wired substantially parallel to the wiring direction of the thin coaxial cable 24, the width dimension can be suppressed as much as possible.
- a modification in which one of the connectors 81 and 82 is a T-shaped connection and the other is an L-shaped connection method may be used.
- the connector 31 ⁇ / b> A has a plurality of connection terminals 41 arranged on a connector main body 43.
- the pitch of the connection terminals 41 can be 0.3 to 0.5 mm.
- the connector main body 43 has a cable connecting portion 44 to which a plurality of small-diameter coaxial cables 24 are connected and a fiber connecting portion 45 to which the optical fiber 25 is connected.
- the thin coaxial cable 24 is connected to the cable connecting portion 44 in the same manner as the connector 31 described above.
- the fiber connecting portion 45 of the connector main body 43 is formed with an accommodating portion 51A formed of a concave portion whose upper surface side is opened, and the optical subassembly 52A constituting the optical component 55 is accommodated in the accommodating portion 51A.
- the optical subassembly 52 ⁇ / b> A includes a photoelectric ferrule 61 and a photoelectric conversion element 62, and the optical fiber 25 is connected to the photoelectric ferrule 61.
- an electrical device 63 constituting the optical component 55 is embedded and attached to the fiber connection portion 45 in the side portion of the housing portion 51A.
- the fiber connection portion 45 is formed with an introduction groove 56 that is curved in an arc shape in plan view, and the optical fiber 25 connected to the optical subassembly 52A is disposed in the introduction groove 56.
- the optical fiber 25 is guided substantially perpendicularly to the length direction of the connector up to the connector 31, but is curved along the introduction groove 56 in the introduction groove 56, and the direction of connection to the optical subassembly 52 ⁇ / b> A is the direction of the thin coaxial cable 24. This intersects the wiring direction on the connector 43. Also in this form, wiring may be performed so that the optical fiber 25 is inclined.
- FIG. 21 shows an optical transmission line using the optical fiber 25.
- the optical transmission path includes an optical fiber 25 and optical components 55 and 55A provided at both ends of the optical fiber 25.
- the optical component 55 on the light transmission side includes an optical subassembly 52 ⁇ / b> A composed of a photoelectric ferrule 61 and a photoelectric conversion element 62, and an electrical device 63.
- the optical component 55A on the light receiving side includes an optical subassembly 52A including an opto-electric ferrule 61A and a photoelectric conversion element 62A, and an electric device 63A.
- the optical fiber 25 is bent and connected to the optical components 55 and 55A in the depth direction of FIG.
- the photoelectric ferrules 61 and 61A are ferrules having electrodes on the surface as described in, for example, Japanese Patent Publication No. 2005-115284.
- the photoelectric ferrules 61 and 61A are made of a material containing any of polyester resin, PPS resin, and epoxy resin, and are formed with insertion holes 61a and 61Aa into which the ends of the optical fiber 25 are inserted.
- the photoelectric ferrules 61 and 61A are photoelectrically converted into electrodes 61b and 61Ab provided on the front end face in the insertion direction of the optical fiber 25 into the insertion holes 61a and 61Aa (direction in which the optical fiber is connected).
- the elements 62 and 62A are conductively connected, and the optical axes of the optical fiber 25 and the photoelectric conversion elements 62 and 62A are linearly arranged.
- the electrodes 61b and 61Ab and the photoelectric conversion elements 62 and 62A are connected by, for example, flip chip connection in which bumps 57 such as gold (Au) are melted and connected by ultrasonic vibration or heat. Since the photoelectric ferrules 61 and 61A and the photoelectric conversion elements 62 and 62A are directly connected, the height and length of both can be minimized, and the size of the fiber connection portion 45 can be reduced. Therefore, the size of the connector can be reduced.
- the fiber connection portion 45 is provided with an electrical connection portion 60, and a part of the electrical connection portion 60 is disposed on the bottom surface of the accommodating portion 51A.
- the electrodes 61b and 61Ab of the photoelectric ferrules 61 and 61A are formed so as to extend to the lower surface which is the side surface of the optical axis in the photoelectric ferrules 61 and 61A, and the electrical connection portion 60 includes the electrodes 61b and 61 61Ab is electrically connected.
- electrical devices 63 and 63A are also conductively connected to the electrical connection portion 60.
- the electrical connection portion 60 extends to the connection portion 42 of the connector main body 43 and serves as a connection terminal 41.
- the accommodating portion 51A is filled with a resin 58, and the gap between the accommodating portion 51A and the optical subassembly 52A is filled with the resin 58.
- the optical subassembly 52A is securely fixed by the resin 58 in the accommodating portion 51A.
- the chip coating paste CCN500D-8B of Panasonic Sakai Factory Solutions as the resin 58, it is possible to ensure good water resistance and noise resistance of the optical subassembly 52A.
- the introduction groove 56 is also filled with a resin 59, and the optical fiber 25 disposed in the introduction groove 56 is fixed by the resin 59. A part of the optical fiber 25 is also accommodated in the accommodating part 51A, and the resin 59 filled in the introduction groove 56 is also filled in the arrangement position of the optical fiber 25 in the accommodating part 51A.
- the types of the resin 58 filled around the optical subassembly 52A and the resin 59 filled around the optical fiber 25 may be different from each other.
- the resin 59 filled around the optical fiber 25 is an elastic adhesive, for example, Super X No. 8008 manufactured by Cemedine Co., Ltd. is used. Thereby, the external force acting on the optical fiber 25 held by the resin 59 can be buffered by the resin 59.
- a method for mounting the optical subassembly 52A to the accommodating portion 51A will be described.
- 22 shows that the electrical connection portion 60 formed on the bottom surface of the accommodating portion 51A and the electrodes 61b and 61Ab on the side surfaces of the photoelectric ferrules 61 and 61A are electrically connected only in the thickness direction. It is connected via the member 65.
- the relay member 65 is made of, for example, an anisotropic conductive film (ACF) or an interposer, and the electrical connection portion 60 and the electrodes 61b and 61Ab are conductively connected by heating or pressurization.
- ACF anisotropic conductive film
- the relay member 65 Since the relay member 65 has elasticity, the electrodes arranged in the width direction of the photoelectric ferrules 61 and 61A by the relay member 65 by electrically connecting the electrical connection portion 60 and the electrodes 61b and 61Ab via the relay member 65. Variations in the heights of 61b and 61Ab are absorbed. Thereby, the electrical connection part 60 and electrode 61b, 61Ab can be connected reliably. Further, for example, by heating the relay member 65, the optical subassembly 52A can be easily attached to and detached from the accommodating portion 51A. Thereby, the optical subassembly 52A can be easily replaced even when a failure occurs in the photoelectric ferrules 61 and 61A and the photoelectric conversion elements 62 and 62A constituting the optical subassembly 52A.
- the electrical connection portion 60 is curved so as to protrude upward on the bottom surface of the accommodating portion 51, and the electrical connection portion 60 is formed of a conductive metal material having spring properties. ing.
- a locking portion 51a for locking the photoelectric ferrules 61 and 61A is formed at the opening edge of the upper portion of the accommodating portion 51A.
- the photoelectric ferrules 61 and 61A are locked by the locking portions 51a formed in the storage portion 51A while being pressed by the electrical connection portion 60 in the storage portion 51A.
- 51A is housed in a state of being detachably positioned.
- the electrical connection part 60 and the electrodes 61b and 61Ab are pressed against each other by the urging force of the electrical connection part 60, and the electrical connection part 60 and the electrodes 61b and 61Ab can be reliably connected to each other.
- the optical subassembly 52A can be easily attached to the accommodating portion 51A. The replacement work can be further facilitated.
- the electrical connection portion 60 protrudes from the length of the photoelectric conversion elements 62, 62A in the optical axis direction toward the surface facing the optical axis of the photoelectric ferrules 61, 61A constituting the optical subassembly 52A. And is electrically connected to the electrodes 61b and 61Ab of the photoelectric ferrules 61 and 61A.
- the electrical connection portion 60 also has a spring property, and the optoelectric ferrules 61 and 61A are sandwiched and fixed between the electrical connection portion 60 and the side wall of the accommodating portion 51A by the biasing force.
- the optical subassembly 52A by pushing the optical subassembly 52A into the housing portion 51A and mounting it, the optical subassembly 52A can be mounted very easily in a state where the electrical connection portion 60 and the electrodes 61b and 61Ab are securely connected. be able to.
- the bottom of the accommodating portion 51A can be eliminated as shown in FIG. That is, it is possible to adopt a structure in which the accommodating portion 51A is formed as a hole penetrating vertically, and the locking portions 51a for locking the photoelectric ferrules 61 and 61A are provided on the upper and lower edges of the receiving portion 51A. Thereby, the thickness of the connector main body 43 can be further reduced.
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Abstract
Description
しかし、そのために同軸ケーブルの本数を増加するとハーネスの径が大きくなり、限られた収容スペースに収容しきれなくなる。また、電気信号である限りノイズを受信してGbpsオーダーの高速通信では信号が正しく伝送されないという問題が生じうる。
前記接続部材に収容部が形成され、
前記光電気フェルールと前記光電変換素子が前記収容部に収容され、
前記収容部に形成された電気接続部が前記電極に接続され、
前記接続部材は被接続部に対して接続可能な接続端子を有し、
前記電気接続部は前記接続端子に導通していることが好ましい。
前記電極は前記光電気フェルールの側面まで延びて形成され、
前記電気接続部は前記収容部の底面に形成されて前記側面の前記電極と接続されているものとすることができる。
前記電気接続部は前記光電気フェルールの光軸の方向に突出して形成されて前記電極と接続されているものとすることができる。
前記収容部と前記光部品との隙間に充填された樹脂と前記収容部と前記光ファイバとの隙間に充填された樹脂の種類が異なり、
前記光ファイバの周囲に充填された樹脂は弾性を有することが好ましい。
前記光電気フェルールは、前記収容部内で前記電気接続部に押圧されつつ、前記収容部に形成された係止部により係止されて、前記収容部内に着脱可能に位置決めされていることが好ましい。
前記複数本の細径電線と前記光ファイバとを、前記光ファイバを最外層に配置して束ねることを特徴とする。
図1に示すように、複合ハーネス20は、複数本(数本から数十本)の細径同軸ケーブル24と少なくとも1本(本実施形態では1本)の光ファイバ25とを有し、配列部21a,21bを除いた中間部が、複数の細径同軸ケーブル24及び光ファイバ25を束ねた束部26とされている。
細径同軸ケーブル24は、中心軸に直交する径方向の断面において、中心から外側に向かって、中心導体、内部絶縁体、外部導体、外被を有する構成であり、コネクタに接続される部分では端末処理が施されて、外部導体、内部絶縁体、中心導体が段階的に所定長さずつ露出している。
光ファイバと細径電線の径はほぼ同径のものを組み合わせるのが好ましい。
この例とは別に、光ファイバ25にプラスチッククラッド光ファイバやプラスチック光ファイバを使用することもできる。
細径電線の本数は、例えば10~20本とし、光ファイバを1本または2本とすると束の径は2mm以下とすることができる。
コネクタ31に接続される細径同軸ケーブル24は、束部からそのまま延びるようにして各線が並列される。コネクタ31の幅方向(細径同軸ケーブル24が配列される方向)に対して束部26の向きがほぼ垂直である。この接続をT字状接続と呼ぶ。
コネクタ32に接続される細径同軸ケーブル24は、束部から延びて約90°曲げられてから並列されてコネクタ32に接続される。コネクタ32の幅方向は束部の向きとほぼ平行となる。この接続をL字状接続と呼ぶ。
図4(b)の形態では、接続部の近くで光ファイバに余長ができるので、接続部近くで曲げや捻りが生じた場合に過度な引っ張り力が光ファイバや接続箇所に及ばず伝送損失の増加や損傷のおそれがない。
フェルール61,61Aは、ポリエステル樹脂、PPS樹脂およびエポキシ樹脂の何れかを含む材料で形成されたもので、光ファイバ25の端末が挿入される挿通孔61a,61Aaが形成されている。そして、このフェルール61,61Aには、挿通孔61a,61Aaへの光ファイバ25の挿入方向(光ファイバが接続される方向)前方側の端面61b,61Abに、光電変換素子62,62Aが取り付けられており、光ファイバ25と光電変換素子62,62Aとの光軸が直線状に配置されている。フェルール61,61Aと光電変換素子62,62Aとを直接接続するので両者の高さおよび長さを最小とすることができ、接続部の寸法を小さくすることができる。したがってコネクタの寸法も小さくできる。
送光側の電気部品63としては、VCSELを駆動させるドライバICが用いられ、受光側の電気部品63Aとしては、PDからの信号を増幅させるトランスインピーダンスアンプ(TIA)が用いられる。TIAをPDのなるべく近くに配置することで、PDからの信号を減衰させる前に増幅させることができる。
光部品55,55A内の各部品は、印刷された配線回路で結ばれている。これにより配線板上の光部品を密に配置して接続部の寸法を小さくすることができる。したがってコネクタの寸法も小さくできる。
なお、シリアライザまたはデシリアライザからなるデータ変換器64,64Aは、配線板51に搭載する必要はなく、また、ノイズが発生するドライバICは、配線板51に搭載しない方が好ましい。これらは機器に搭載する。
このように光ファイバを使用することにより、Gbpsオーダーの高速シリアル通信が可能である。
なお、コネクタ31,32としては、細径同軸ケーブル24及び光ファイバ25を横一列に配列して接続するタイプでも良く、また、複数段に配列して接続するタイプでも良い。
先に束部26を作ってから細径同軸ケーブル24を成端処理するのでもよい。
また、光ファイバ25は、細径同軸ケーブル24とは別に、ガラスファイバを露出させ、光部品55のフェルールに差し込んで固定する。
これにより、中間部が束部26とされ、この束部26で光ファイバ25が最外層に配置された複合ハーネス20が得られる。
この複合ハーネス20によれば、束ねた細径同軸ケーブル24の外周に、光ファイバ25を巻いて沿わせることにより、必然的に光ファイバ25を細径同軸ケーブル24よりも長くすることができる。よって、湾曲することによる光ファイバ25の引っ張りを極力抑えることができ、引っ張り応力による伝送損失をなくすことができる。
図10に示す形態では、携帯電話端末3は、第1筐体1及び第2筐体2の端部同士が、ヒンジ4によって回動可能に連結され、開閉されることにより位置関係が変化する。第1筐体1及び第2筐体2は、その連結側の端面に、ケーブル挿通孔5,6がそれぞれ形成されており、これらのケーブル挿通孔5,6から、複合ハーネス20の両端がそれぞれ導入されている。また、ヒンジ4には、連通孔4aが形成されており、この連通孔4a内に複合ハーネス20が挿通されている。
複合ハーネス20は、束部では光ファイバが最外層に配置されているので、その束部が変形(湾曲や捻回)しても、細径電線が光ファイバを押すことがなく光ファイバに加わる側圧が極力抑えられる。これにより、狭いヒンジ4に複合ハーネス20を損傷を起こすことなく通すことができ、光ファイバにおける伝送損失の増大や疲労破断を防いで、第1筐体1に含まれる基板と第2筐体に含まれる基板とを複合ハーネス20で接続して光ファイバによる通信の高速化を図ることができる。
例えば、図1において複合ハーネス20が左に曲げて使用される場合は、束の右側に光ファイバを添わせる。そしてPTFEテープである束ね部材を巻き付けて束部26とし、その両端に接着剤付きのPETテープを巻いてPTFEテープが解けないようにする。光ファイバ25の両端末はフェルールに挿入され、そのフェルールはコネクタ31,32の所定の箇所に載せられて固定される。コネクタの幅方向に対するフェルールの取付角度は45度とする。光ファイバの余長は束部26、配列部21aおよび配列部21bに吸収される。この複合ハーネスであれば20万回の捻回試験(±90度)の結果、断線なく伝送損失の増加も問題なかった。
一方、光ファイバに余長を持たせず、他の同軸ケーブルと区別なく束ねると、光ファイバが束の内部に取り込まれてしまう。複合ハーネスが20万回の捻回を受ける間に束の内部の電線が外に飛び出す現象がある確率で起こる。光ファイバが飛び出した場合、伝送損失の増加または断線が生じ不良となるものと考えられる。しかし、本発明の複合ハーネスは光ファイバが外に飛び出してキンクすることがないので伝送損失の増大や疲労破断のおそれが非常に少ない。
図11に示す複合ハーネス20Aは、コネクタ31,32における細径同軸ケーブル24の配列方向(図11では左右方向)に対して束部26での細径同軸ケーブルの方向(図11では上下方向)が略直交に配線されてT字状とされている。
コネクタおよび接続部の寸法(細径電線および光ファイバが接続された状態)は、奥行きを3~5mm、高さを1~2mmとする。幅(配列方向の長さ)は線の数によるが数mm~十数mmとなる。
さらに、コネクタ81,82の一方がT字状、他方がL字状の接続方式である変形例でもよい。
図19及び図20に示すように、コネクタ31Aは、コネクタ本体43に複数の接続端子41が配列されている。接続端子41のピッチは0.3~0.5mmとすることができる。
コネクタ本体43には、複数本の細径同軸ケーブル24が接続されるケーブル接続部44と、光ファイバ25が接続されるファイバ接続部45とを有している。ケーブル接続部44に細径同軸ケーブル24が接続されるのは先に説明したコネクタ31と同様である。
この光サブアセンブリ52Aは、光電気フェルール61と光電変換素子62とを有し、光電気フェルール61に、光ファイバ25が接続される。また、ファイバ接続部45には、収容部51Aの側部に、光部品55を構成する電気デバイス63が埋め込まれて装着されている。
光ファイバ25はコネクタ31まではコネクタの長さ方向に略垂直に導かれるが、導入溝56内では導入溝56に沿って湾曲され、光サブアセンブリ52Aに接続する方向が細径同軸ケーブル24のコネクタ43上での配線方向と交差することになる。この形態でも、光ファイバ25が斜めになるように配線しても良い。
図22に示すものは、収容部51Aの底面に形成された電気接続部60と光電気フェルール61,61Aの側方の面の電極61b,61Abとを、厚さ方向へのみ導電性を有する中継部材65を介して接続したものである。この中継部材65は、例えば、異方性導電フィルム(ACF)またはインターポーザなどからなるもので、加熱または加圧することにより、電気接続部60と電極61b,61Abとが導通接続される。これにより、光サブアセンブリ52Aは、中継部材65によって収容部51Aに着脱可能に収容されている。
また、例えば、中継部材65を加熱することにより、光サブアセンブリ52Aを収容部51Aへ容易に着脱させることができる。これにより、光サブアセンブリ52Aを構成する光電気フェルール61,61Aや光電変換素子62,62Aに不具合が生じた際にも、光サブアセンブリ52Aを容易に交換することができる。
これにより、電気接続部60と電極61b,61Abとは、電気接続部60の付勢力によって互いに押し付けられ、電気接続部60と電極61b,61Abを確実に導通接続させることができる。
また、光サブアセンブリ52Aを、電気接続部60の付勢力に抗して収容部51Aへ押し込むことにより、この光サブアセンブリ52Aを容易に収容部51Aへ装着させることができ、光サブアセンブリ52Aの交換作業のさらなる容易化を図ることができる。
この構造では、収容部51Aへ光サブアセンブリ52Aを押し込んで装着させることにより、極めて容易に、光サブアセンブリ52Aを、電気接続部60と電極61b,61Abが確実に導通接続された状態に装着させることができる。
Claims (13)
- 複数本の細径電線と少なくとも1本の光ファイバとを有し、前記細径電線及び前記光ファイバの端部以外の箇所が束ねられて束部とされ、前記束部で前記光ファイバが最外層に配置されていることを特徴とする複合ハーネス。
- 請求項1に記載の複合ハーネスであって、
前記複合ハーネスの端部で前記細径電線が並列に配置されているとともに前記光ファイバが前記細径電線の配列の端に配置されていることを特徴とする複合ハーネス。 - 請求項1に記載の複合ハーネスであって、
前記複数本の細径電線には、細径同軸ケーブルが含まれていることを特徴とする複合ハーネス。 - 請求項1から3の何れか一項に記載の複合ハーネスであって、
前記細径電線及び前記光ファイバの端末が接続される接続部材を有し、前記接続部材には前記光ファイバが接続される光部品が搭載され、前記光部品に前記光ファイバを接続する方向が、前記細径電線が前記接続部材に配列される方向と交差する方向とされていることを特徴とする複合ハーネス。 - 請求項1から4の何れか一項に記載の複合ハーネスであって、
前記束部では、束ねられた前記細径電線の外周に沿うように前記光ファイバが巻き付けられていることを特徴とする複合ハーネス。 - 請求項4に記載の複合ハーネスであって、
前記接続部材は、被接続部に対して接続可能とされ、前記被接続部に対する接続方向は、前記接続部材で前記細径電線が配列される面に沿う方向とされていることを特徴とする複合ハーネス。 - 請求項4に記載の複合ハーネスであって、
前記接続部材は、被接続部に対して接続可能とされ、前記被接続部に対する接続方向は、前記接続部材で前記細径電線が配列される面に直交する方向とされていることを特徴とする複合ハーネス。 - 請求項7に記載の複合ハーネスであって、
前記接続部材には、異方性導電フィルムまたはインターポーザからなる中継部材が、前記接続部材に前記細径電線または前記光ファイバが接続される面またはその裏面に設けられていることを特徴とする複合ハーネス。 - 請求項4に記載の複合ハーネスであって、
前記光部品が光電気フェルールと前記光電気フェルールの電極に接続された光電変換素子を有し、
前記接続部材に収容部が形成され、
前記光電気フェルールと前記光電変換素子が前記収容部に収容され、
前記収容部に形成された電気接続部が前記電極に接続され、
前記接続部材は被接続部に対して接続可能な接続端子を有し、
前記電気接続部は前記接続端子に導通していることを特徴とする複合ハーネス。 - 請求項9に記載の複合ハーネスであって、
前記収容部には前記光ファイバの一部も収容され、
前記収容部と前記光部品との隙間に充填された樹脂と前記収容部と前記光ファイバとの隙間に充填された樹脂の種類が異なり、
前記光ファイバの周囲に充填された樹脂は弾性を有することを特徴とする複合ハーネス。 - 請求項9に記載の複合ハーネスであって、
前記電気接続部はバネ性を有し、
前記光電気フェルールは、前記収容部内で前記電気接続部に押圧されつつ、前記収容部に形成された係止部により係止されて、前記収容部内に着脱可能に位置決めされていることを特徴とする複合ハーネス。 - 請求項1に記載の複合ハーネスを製造する方法であって、
前記複数本の細径電線と前記光ファイバとを、前記光ファイバを最外層に配置して束ねることを特徴とする複合ハーネスの製造方法。 - 請求項12に記載の複合ハーネスを製造する方法であって、
前記複数本の細径電線の端末を成端処理して接続部材に接続するとともに、前記光ファイバの端末を成端処理して前記接続部材上の光部材に接続し、前記細径電線が前記接続部材で配列される方向と前記光ファイバを前記接続部材に接続する方向を交差させることを特徴とする複合ハーネスの製造方法。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS55105909A (en) * | 1979-02-08 | 1980-08-14 | Furukawa Electric Co Ltd | Electric cable |
JPH0179219U (ja) * | 1987-11-13 | 1989-05-29 | ||
JPH09237524A (ja) * | 1996-02-28 | 1997-09-09 | Kyowa Electron Instr Co Ltd | 設定位置識別機能付きリードケーブル |
JPH09270209A (ja) * | 1996-04-01 | 1997-10-14 | Hitachi Cable Ltd | 水中ポンプ用平型ケーブル |
JP2005078962A (ja) * | 2003-09-01 | 2005-03-24 | Yazaki Corp | ワイヤハーネス |
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CN2488152Y (zh) * | 2001-06-22 | 2002-04-24 | 王德清 | 室内外光纤复合电力线 |
JP2009210906A (ja) * | 2008-03-05 | 2009-09-17 | Tomoegawa Paper Co Ltd | 光ファイバ集合体 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55105909A (en) * | 1979-02-08 | 1980-08-14 | Furukawa Electric Co Ltd | Electric cable |
JPH0179219U (ja) * | 1987-11-13 | 1989-05-29 | ||
JPH09237524A (ja) * | 1996-02-28 | 1997-09-09 | Kyowa Electron Instr Co Ltd | 設定位置識別機能付きリードケーブル |
JPH09270209A (ja) * | 1996-04-01 | 1997-10-14 | Hitachi Cable Ltd | 水中ポンプ用平型ケーブル |
JP2005078962A (ja) * | 2003-09-01 | 2005-03-24 | Yazaki Corp | ワイヤハーネス |
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