WO2010095334A1 - 同軸線配線体、その製造方法、および電子機器 - Google Patents
同軸線配線体、その製造方法、および電子機器 Download PDFInfo
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- WO2010095334A1 WO2010095334A1 PCT/JP2009/070913 JP2009070913W WO2010095334A1 WO 2010095334 A1 WO2010095334 A1 WO 2010095334A1 JP 2009070913 W JP2009070913 W JP 2009070913W WO 2010095334 A1 WO2010095334 A1 WO 2010095334A1
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- WIPO (PCT)
- Prior art keywords
- coaxial
- resin
- wiring body
- seal portion
- seal
- Prior art date
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Classifications
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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
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/20—Cables having a multiplicity of coaxial lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
Definitions
- the present invention relates to a coaxial wire wiring body, a manufacturing method thereof, and an electronic device.
- the hinge is wet with water.
- the present invention also relates to a coaxial line wiring body, a manufacturing method thereof, and an electronic device using the coaxial wiring body, which can prevent water from entering the two casings through the coaxial line.
- a circuit in a first casing in which two casings are connected by a hinge and a display unit is provided, and a circuit in a second casing in which a key operation unit is provided are: Conductive connection is made by the wiring body.
- these electronic devices have been required to be waterproof.
- a need for waterproofing at the portion of the wiring body insertion opening provided in the housing Is required.
- a uniaxial hinge structure a flexible printed wiring board, a flat cable, etc. are used for the wiring body, but in the case of a biaxial hinge structure, isotropic flexibility is required, so a coaxial line should be used.
- the waterproof structure of the above wiring body requires components such as a tube, a cylindrical seal member, and an O-ring. For this reason, a spatially overlapping portion is generated in the wiring body, and the cross-sectional area of (coaxial line + tube) increases and becomes large.
- the (coaxial wire + tube) passes through the hinge structure while being bent zigzag, and is arranged between the two wiring body insertion ports.
- the hinge structure and the surrounding structure may become complicated and large. Further, since the number of parts increases, the parts procurement cost and the manufacturing process become complicated and the economy becomes low.
- the present invention provides a coaxial wiring body, a method for manufacturing the same, and a coaxial wiring body, which ensure waterproofness at the insertion opening of the housing and reduce the number of parts while miniaturizing and simplifying the structure of the hinge and its periphery.
- An object is to provide an electronic device used.
- the coaxial line wiring body of the present invention includes a plurality of coaxial lines and a seal portion formed so as to be integrated with the plurality of coaxial lines.
- the seal portion includes a gap filling portion that fills gaps between the plurality of coaxial lines and a peripheral portion that surrounds the plurality of coaxial lines.
- a coaxial line can be provided in the electrical circuit.
- a sealing device may be comprised only by said sealing part, and a sealing device may be comprised using other components, such as an O-ring.
- the above-mentioned gap filling part may be of a degree of filling that can prevent water from passing through the gaps of the plurality of coaxial lines and passing through the seal part, and completely filling the gap part of the entire passage part of the seal part. There is no need to be.
- the contact surface between the seal portion and the plurality of coaxial lines may be melted and fused, or may not be fused.
- the plurality of coaxial lines are merely overlapped with the gap filling portion and the peripheral portion in the seal portion, and this portion is a portion that is fitted and fixed to the insertion port of the housing in the electronic device.
- the cross-sectional area does not increase.
- the coaxial line is bare (adhesive tape etc. for fixing the twisted state of multiple coaxial lines is wound), but the jacket of the jacket is made of insulating resin and is waterproof As a result, the entire waterproofness is ensured.
- a tube for sheathing (coating) the coaxial line it is not necessary to use a tube for sheathing (coating) the coaxial line, and the number of parts can be reduced.
- the hinge structure and the peripheral structure can be simplified and reduced in size.
- a waterproof seal portion can also serve as a dust proof. Thereafter, dust prevention will not be discussed, but naturally, a dustproof action can be obtained along with waterproofing.
- the number of seal portions for constituting the seal device may be one, or two or more.
- a concave portion obtained by removing the outer periphery of the coaxial line or a convex portion protruding so as to cover the outer periphery is provided, and between the plurality of integrated coaxial lines A lateral opening space that opens to the outside is formed by the concave portion or the convex portion of each coaxial line, and the seal portion can be formed so as to pass through the lateral opening space. Accordingly, the concave portion or the convex portion provided locally in an annular shape creates a lateral opening space in a portion where the seal portion is formed when a plurality of coaxial lines are bundled.
- the resin for forming the gap filling portion does not reach the inside of the bundled coaxial lines. In particular, it does not reach the center of the unity. As a result, a coaxial gap portion that is not filled with the resin is generated, and a moisture travels along the coaxial line through the gap portion.
- the resin can reach from the outside to the binding center through the lateral opening space. Can do.
- the deleted portion becomes a lateral opening space.
- the convex part hits each other, and the space
- the gap filling portion can be surely formed to be thick up to the binding center portion of the coaxial line. The higher the depth of the concave portion or the height of the convex portion, the thicker the space between the coaxial lines, and thus the gap filling portion can be formed thicker. In other words, the resin can be passed with a margin.
- a plurality of coaxial lines are flat knitted coaxial lines having a knitting yarn knitted by alternately sewing a plurality of coaxial lines, and the flat knitted coaxial lines are rounded into a flat knitted belt shape, or an annular shape or a spiral shape.
- the seal portion may be formed so as to pass through the gap between the coaxial lines formed by the knitting yarn. As a result, a certain gap is formed by the knitting yarn, and when the resin is injected to form the seal portion, the resin can easily pass to the central portions of the plurality of coaxial lines. As a result, the resin filling of the seal portion can be improved, and for example, no pore (hole) can be formed in the central portion of the seal portion.
- the plurality of coaxial lines in the portion where the seal portion is formed are curved and bulged so as to be separated from each other to form a bulging and separating portion, and the sealing portion of the coaxial line of the bulging and separating portion is formed.
- the structure currently formed so that it may pass may be taken.
- the bulging and separating portion can be rephrased as a portion that is bent and curved. Accordingly, when the resin of the seal portion is injection-molded, it becomes easy to fill the resin to the inside through the bulging and separating portion of the coaxial line.
- the form in which a plurality of coaxial lines are curved and bulge that is, the bulging and separating portions need not be symmetric with respect to the central axis of the bundled coaxial lines, and the entire coaxial line bends in a predetermined direction. It may be out. It is only necessary that a portion that is separated from the outer portion of any of the bound coaxial wires is formed.
- a groove for inserting an O-ring can be provided on the outer peripheral surface of the peripheral portion of the seal portion.
- the resin of the seal portion may be an elastic body or may not be an elastic body.
- the outer peripheral surface of the peripheral portion of the seal portion can be a seal surface.
- the number of parts can be further reduced without using an O-ring or the like.
- the resin of the seal part is desirably an elastic body.
- the resin forming the seal portion can be a resin having an MFR (melt flow rate (JIS K7210)) of 50 g / 10 min or more at a temperature of 190 ° C. and a nominal load of 2.16 kg. If a gap or a hole is formed in the gap of the coaxial line, there is a possibility that the complete waterproofness cannot be maintained. When emphasizing eliminating gaps in the gap filling portion in order to ensure waterproofness, emphasis is placed on the fluidity of the resin during injection molding. By making MFR larger than the above value as described above, the resin can flow into the gap of the coaxial line at the time of injection molding, and the gap can be eliminated.
- MFR melt flow rate
- the resin forming the seal portion may be a resin having a lower melting point than that of the coaxial jacket resin.
- the seal portion is not intended to be fused with the jacket of the coaxial line (may be fused), and instead, high fluidity can be obtained and the gap can be eliminated by flowing into the gap of the coaxial line. .
- the coaxial line and the seal portion can be in a state where they are not fused on the contact surface. Accordingly, it is possible to form a seal portion having no gap in the gap between the coaxial lines, with emphasis on the flow of the seal portion forming resin into the gap between the coaxial lines at the time of forming the seal portion rather than fusion of the contact surfaces. Even if the contact surface between the coaxial line and the seal portion is not fused, it is possible to obtain airtightness that can ensure sufficient waterproofness by mechanical force such as compression force at the time of injection molding.
- An ethylene-methacrylic acid copolymer resin (EMAA resin) can be used as the resin forming the seal portion.
- the EMAA resin has a high MFR above the melting point, and does not flow through the gap between the coaxial lines. Further, when EMAA resin is used, the above contact surface can be provided with airtightness that can ensure waterproofness even if it is not fused after injection molding for forming a seal portion.
- the resin forming the seal portion may be the same resin as the insulating layer that insulates the coaxial signal line and the ground line, or a resin having a lower melting point than the resin of the insulating layer. This can prevent deterioration such as deformation due to softening of the insulating layer during injection molding.
- a coaxial line is usually composed of (a signal line / insulating layer / ground line / jacket which is a jacket), and the jacket is made of the same resin as the insulating layer or a resin having a lower melting point than the resin of the insulating layer. Used.
- the resin forming the seal portion is the same as the resin of the coaxial jacket or a resin having a higher melting point than the resin of the jacket. Therefore, the integral connection between the jacket and the seal portion can be ensured, and the connection strength can be increased.
- the resin for forming the seal portion can be PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or ETFE (tetrafluoroethylene / ethylene copolymer).
- the coaxial line uses a resin having a low high-frequency dielectric constant for the insulating layer between the signal line at the core and the surrounding ground line in order to prevent leakage of the high-frequency signal.
- the jacket is also an insulating resin having a low high-frequency dielectric constant, but it may be the same as or different from the resin forming the insulating layer.
- the resin used for the insulating layer is PFA.
- PFA has a very low high-frequency dielectric constant.
- the resin typically used for the jacket is PFA or ETFE.
- ETFE has a low high-frequency dielectric constant and a lower melting point than PFA.
- PFA has a melting point of 310 ° C and ETFE has a melting point of 260 ° C.
- PFA or ETFE coaxial wire As the jacket.
- the seal portion can be formed by injection molding continuously with the jacket using the same material as the jacket or a material having a melting point higher than that of the jacket. For this reason, the gap filling portion and the peripheral portion can be reliably connected to the jacket. That is, the connection strength between the jacket and the seal portion can be improved.
- ETFE is used for the seal portion, it is preferable to use a coaxial line using ETFE for the jacket.
- the resin forming the seal portion has a low high-frequency dielectric constant, which can contribute to prevention of deterioration of the high-frequency signal.
- a plurality of coaxial lines can be flatly arranged in a planar shape, or a bundled arrangement in which a cross-sectional circle or an ellipse is bundled.
- a seal portion having an appropriate cross-sectional shape can be formed according to the model of the electronic device.
- bundle arrangement the surface area can be reduced to form a coherent seal part shape.
- the gap portion of the coaxial line is exposed to the outside, a highly airtight gap filling portion can be reliably and easily formed by resin injection molding. Further, for example, in the case of an elliptical cross section, it is useful for making the casing of the mobile phone thinner.
- the seal part can be provided at one place or two places. Accordingly, waterproof wiring for one housing or waterproof wiring for conductive connection between two housings for two housings can be performed.
- conductive connection between two housings in an electronic device in which a first housing provided with a display unit and a second housing provided with a key operation unit are connected by a hinge structure, while ensuring waterproofness,
- the electric circuits of both cases can be conductively connected while reducing the cross-sectional area of the wiring body outside the cases.
- An electronic device using any one of the above-described coaxial wire bodies can be electrically conductively connected while ensuring waterproofness while being simplified and downsized. Further, when the coaxial line is used in an electronic device using a biaxial hinge structure, the casing can be smoothly rotated around two orthogonal axis lines. This is an advantage over flexible printed wiring and flat cables. Of course, it can also be used for a uniaxial hinge structure.
- the manufacturing method of the coaxial wiring body of the present invention manufactures a coaxial wiring body including a plurality of coaxial lines and a seal portion formed so as to be integrated with the plurality of coaxial lines.
- the manufacturing method includes a step of preparing a molding die, a step of heating the molding die to a temperature equal to or higher than the melting point of the resin of the seal portion while setting a plurality of coaxial lines in the molding die, A step of injecting a molten resin to be formed into a molding die; and a step of cooling the die to a predetermined temperature equal to or lower than the melting point of the resin while the resin in the seal portion is injection-molded. .
- the resin of the coaxial line jacket and the resin of the seal part may be melted and fused with each other, or the resin temperature of the seal part is fused lower than the melting point of the resin of the jacket at the time of injection molding. It does not have to be.
- a resin having a large MFR is used, and since such a resin has a low melting point, it is heated to a temperature lower than the melting point of the resin of the jacket and injection molded. Therefore, it does not fuse with the jacket.
- die means forced cooling which obtains a bigger cooling rate than the cooling cooled in air, and water cooling, spray cooling, forced air cooling, etc. correspond. Such cooling is applied to the mold as one factor, and the resin may shrink and the airtightness may be improved (under confirmation).
- a lateral opening space that passes from the outside to the bundling center can be locally formed in the portion that forms the sealed portion of the bundled coaxial line.
- the gap filling portion can be formed through the resin to the binding center portion.
- the flat knitted coaxial line As a flat knitted coaxial line having a knitting yarn obtained by alternately sewing a plurality of coaxial lines into a plurality of coaxial lines, the flat knitted coaxial line is shaped as a flat knitted belt, or rounded or spiraled. It may be set in a mold. Accordingly, when the resin is injected to form the seal portion, the resin can be filled through the gap of the coaxial line. As a result, the resin filling property of the seal portion can be improved, and pores and the like can be prevented.
- a movable part is provided on both sides or one side adjacent to the mold part for injecting the resin for forming the seal part so that the distance to the mold part to be injected can be changed by grasping a plurality of coaxial lines.
- a coaxial wiring body and an electronic device using the same in which the number of parts is reduced while miniaturizing and simplifying the structure of the hinge and its surroundings while ensuring waterproofness at the insertion opening of the housing. Can be obtained.
- FIG. 1 shows a mobile phone using a coaxial wiring body according to Embodiment 1 of the present invention, in which (a) is in a closed state, (b) is in an open state, (c) is in a closed state with a display portion as a table,
- FIG. It is sectional drawing which shows the arrangement
- the seal part of the coaxial wiring body of FIG. 3 is shown, (a) is a perspective view of a seal part, (b) is sectional drawing.
- FIG. 5 It is the elements on larger scale of FIG.5 (b). It is a perspective view which shows the coaxial wire body of the modification (Example of this invention) in Embodiment 1.
- FIG. It is sectional drawing of the seal part of the coaxial wiring body shown in FIG.
- FIG. 7 shows a manufacturing method of the coaxial wiring body shown in FIG. 7, (a) is a plan view showing a state in which the fine coaxial wires are flatly arranged, and (b) shows a state in which the seal portion is integrated by injection molding after twisting.
- FIG. It is sectional drawing for demonstrating the coaxial wire body in Embodiment 2 of this invention. It is a perspective view which shows the coaxial wiring body in Embodiment 3 of this invention.
- FIG. 17 is a cross-sectional view of the coaxial line assembly of FIG. 16, where (a) shows a gap surrounded by three coaxial lines, and (b) shows a gap surrounded by four coaxial lines. . It is a figure which shows the coaxial line aggregate
- 8 shows a coaxial line wiring body according to a seventh embodiment of the present invention, where (a) shows a flat knitted wire and (b) shows a coaxial line wiring body using a flat knitted wire.
- 8 shows a method for manufacturing a coaxial wiring body according to an eighth embodiment of the present invention, in which (a) shows a state in which a plurality of coaxial wires are set in a molding die for forming a seal part, and (b) shows a movable part It is a figure which shows the state which was made to approach the type
- FIG. 1 is a diagram showing a mobile phone 50 that is an electronic device in which the coaxial wiring body according to Embodiment 1 of the present invention is used.
- the mobile phone 50 includes a key operation unit housing 20 and a display unit housing 30 which are connected by a hinge structure 40.
- the display unit housing 30 is closed on the key operation unit housing 20 with the back surface facing forward.
- the display unit housing 30 is rotatable around the X axis and the Y axis of the hinge structure 40.
- FIG. 1B is a diagram illustrating a state in which the display unit housing 30 including the display unit 31 is rotated around the X axis of the hinge structure 40 and opened.
- Keys 21 are arranged in the key operation unit housing 20.
- An electric signal generated by operating the key 21 is transmitted from a wiring circuit (not shown) in the key operation unit housing 20 to a wiring circuit (not shown) in the display unit housing 30.
- a coaxial wire body to be described below is used for transmission of this electric signal.
- the hinge structure is centered on the cover 41 of the Y-axis rotation shaft mechanism, the left A portion is the portion including the X-axis rotation shaft mechanism, and the right B portion is the display unit housing. This is a portion in which the coaxial wiring body is accommodated, which conductively connects the body 30 and the key operation unit housing 20.
- the A part and the B part rotate around the Y axis around the center cover 41.
- the display unit housing 30 is rotated 180 ° around the Y axis, the B part is on the left side, the A part is on the right side, and from the state of FIG. 1A around the X axis. And the display unit casing 30 is overlapped with the key operation unit casing 20 and closed with the display unit 31 facing the front side.
- FIG. 2 is a cross-sectional view of the periphery of the hinge structure in the state of FIG.
- the coaxial wiring body 10 includes the sealing device S in both a portion inserted into the key operation unit housing 20 and a portion inserted into the display unit housing 30.
- the sealing device S includes a seal portion 3 formed so as to be integrated with a plurality of coaxial wires 11 by injection molding, and an O-ring 13 wound around the seal portion 3.
- the shaft portion of the Y-axis rotation shaft mechanism under the center cover 41 is cylindrical and is fixed to the key operation unit housing 20.
- the display unit housing 30 rotates about the Y axis
- the display unit case 30 rotates about the cylindrical portion, but the X axis rotation shaft mechanism A and the coaxial wiring body storage unit B included in the hinge structure are also displayed. It rotates around the Y axis together with the housing 30.
- This cylindrical portion (inner cylinder) serves as an insertion port for the coaxial wiring body 10.
- the coaxial line wiring body 10 has connectors 19 attached to both ends thereof.
- the coaxial wiring body 10 is fitted with a waterproof seal device S in an insertion port provided in the display unit housing 30, and is connected to a hinge-structure Y-axis rotation shaft mechanism via the storage part B of the coaxial wiring body.
- the other sealing device S is fitted into the insertion opening of the included cylindrical portion (opened in the key operation unit housing 20).
- this embodiment is used to electrically connect the two casings 20 and 30 connected by the biaxial hinge structure 40 that can rotate around the X axis and the Y axis while ensuring waterproofness.
- the coaxial wiring body 10 in the form is very suitable.
- a plurality of coaxial wires are arranged as they are in the storage portion B of the coaxial wire wiring body (they are fixed in a twisted state by a twist and an adhesive tape), and a sheath component such as a tube may not be used. .
- the accommodating part B can be reduced in size and the structure of the wiring body insertion port can be simplified.
- the coaxial line it is preferable to use a very fine coaxial line.
- FIG. 3 is a perspective view showing the coaxial wiring body 10 of the present exemplary embodiment.
- the sealing device S includes a seal portion 3 that is a resin molded body integrated with a plurality of coaxial wires 11 by injection molding, and an O wound around the seal portion 3. It is composed of a ring 13.
- FIG. 4 is a schematic view showing a state in which the coaxial wiring body 10 is fitted into the insertion slot of the key operation unit housing 20 or the display unit housing 30.
- the sealing device S fitted in the insertion opening of the housing 20 or 30 does not allow water to enter the housing 25 or 35 even if the hinge structure 40 gets wet with water.
- the plurality of coaxial lines 11 are made of an insulating resin, and the jacket, which is a jacket, has water repellency. Even when the jacket becomes wet, the jacket itself does not become an intrusion path.
- FIGS. 5A and 5B are diagrams for explaining the seal portion 3 integrated with the coaxial line 11 by injection molding.
- FIG. 5A is a perspective view of the seal portion
- FIG. 5B is a view in which an O-ring is wound around the seal portion. It is a cross-sectional view in a state.
- the seal portion that is a resin molded body is integrated with the plurality of coaxial wires 11. But that alone is not enough to perform the preventive function. For example, if there is a gap between individual coaxial lines and the gaps communicate with each other along the coaxial line, a waterproof function cannot be obtained. Therefore, as shown in FIGS.
- the seal portion 3 includes a gap filling portion 3 j that fills the gap between the coaxial wires 1 and a peripheral edge portion 3 s that surrounds the plurality of coaxial wires 11. . It is desirable that the gap filling portion 3j is completely filled without leaving any gap, but a continuous gap should be formed so that the gap communicates with the seal portion 3 even if there is a little gap (pore). That's fine.
- the contact surfaces of the seal portion and the plurality of coaxial lines may be melted and fused to each other, or may not be fused.
- the seal portion 3 is provided with an O-ring groove and has a groove bottom surface 3b with respect to the surface 3a.
- An O-ring 13 is wound around the groove.
- reliable waterproofness can be obtained while reducing the dimensional accuracy of the portion directly constituting the seal device S.
- seven coaxial lines are shown as the plurality of coaxial lines 11, but usually several tens, for example, about 40 coaxial lines are used.
- the ultra-fine coaxial line is particularly desirable for reducing the size of the coaxial wiring body 10.
- FIG. 6 is a cross-sectional view for explaining the structure of the seal portion 3 which is a resin molded body integrated into a plurality of coaxial lines by injection molding.
- One coaxial line (ultrafine coaxial line) 1 includes a signal line 1a located at the core, a ground line 1g around the signal line 1a, an insulating layer 1d that is a layer that insulates the signal line 1a and the ground line 1g, It is comprised with the jacket 1s which is the jacket which coat
- the seal portion 3 that is a resin molded body is formed as a continuous resin that is compatible with the jacket 1s, and it is desirable that the bonding strength between the seal portion 3 and the jacket 1s is high.
- the seal portion 3 needs to have a gap filling portion 3j that fills the gap between the coaxial lines 1. Although it is inevitable that gaps are formed in the plurality of coaxial wires 11, it is necessary to fill the gap filling portion 3j to such an extent that the gaps are not made continuous gaps that can communicate and pass through. If the resin which comprises the seal
- the peripheral portion 3s of the seal portion 3 is indispensable for surrounding the plurality of coaxial lines 11 and forming a highly reliable seal device S.
- FIG. 7 is a perspective view showing a coaxial wiring body 10 of a modified example (which is an example of the present invention) with respect to the first embodiment.
- FIG. 8 is a cross-sectional view including an O-ring of the sealing device S of FIG.
- FIG. 9 is a partially enlarged view of FIG. 8 excluding the O-ring.
- the coaxial line (extra-coaxial line) 1 is arranged flat. In such a flat arrangement, the gap between the coaxial lines 1 is not located in the inner part, but is located in a place visible from the outside. For this reason, as shown in FIG.
- the gap filling portion 3j can be reliably and easily formed during injection molding. For this reason, it is possible to easily manufacture the seal portion 3 having high airtightness in the vertical direction (coaxial line extending direction) while paying much attention to the properties of the peripheral edge portion 3 s that becomes a flat plate surface shape.
- the coaxial line wiring body 10 of the modification shown in FIGS. 7 to 9 easily forms the gap filling portion 3j that is difficult in terms of complete filling with high reliability. It has a feature in that it can.
- a method for manufacturing the coaxial wiring body 10 shown in FIGS. 7 to 9 will be described.
- a plurality of coaxial wires 1 (11) having connectors 19 at both ends are prepared.
- the plurality of coaxial lines 1 (11) are arranged in a planar shape.
- the predetermined part of the coaxial line is disposed in the mold so that the coaxial line 11 passes through the predetermined position of the mold.
- molten resin is injected from the nozzle at a predetermined pressure into the mold through a gate which is a resin introduction port.
- the coaxial wire body 10 shown in FIGS. 7 to 9 can be obtained by taking out from the mold.
- FIG. 10A is a view showing a plurality of coaxial wires 11 having connectors 19 at both ends, which are arranged for the purpose of making the finished coaxial wiring body 10 curved.
- the coaxial lines arranged in a planar shape are arranged in such a way that long ones are arranged in order toward one side, and are greatly curved in order to the outside.
- a twisted wire 11 that is curved convexly on one side is obtained.
- This is wrapped with an adhesive tape or the like to fix the curved twisted state. That is, at the time of placement in the mold, a curved state has already been formed, and this curved twisted state is fixed by an adhesive tape or the like.
- the twisted coaxial line 11 passes through a predetermined position of the mold, and the predetermined portion of the coaxial line is placed in the mold in consideration of the direction of curvature and the like.
- FIG. 10B shows the coaxial wiring body 10 taken out from the mold after cooling.
- the direction of bending can be determined by the orientation, posture, and the like when placed in the mold.
- the coaxial line wiring body of the present embodiment the plurality of coaxial lines only overlap the gap filling portion and the peripheral portion in the seal portion. This portion is a portion that is fitted and fixed in the insertion port of the housing in the electronic device, and the cross-sectional area does not increase.
- the coaxial line is bare in portions other than the seal portion, but the jacket is made of an insulating resin and has waterproofness and water repellency, so that the entire waterproofness is ensured. Therefore, it is not necessary to use a tube that sheathes the coaxial line, and the hinge structure can be simplified and reduced in size. In addition, the number of parts can be reduced.
- FIG. 11 is a cross-sectional view showing the coaxial wiring body 10 according to Embodiment 2 of the present invention.
- the coaxial line 1 is a flat arrangement.
- the coaxial wiring body 10 of the second embodiment is characterized in that the resin of the insulating layer 1d of the coaxial line 1 is PFA, the resin of the jacket 1s is ETFE, and the resin of the seal portion 3 is ETFE.
- PFA resin of the insulating layer 1d of the coaxial line 1
- ETFE the resin of the seal portion 3
- the melting point of PFA forming the insulating layer 1d is 310 ° C., which is about 50 ° C. higher than the melting point 260 ° C. of ETFE of the resin of the seal portion 3.
- the ETFE of the jacket 1s and the ETFE of the seal portion 3 are the same resin, and the integration is the same material connection by injection molding. For this reason, connection integration can be performed smoothly and connection strength can be increased.
- -Modification 1 (Example of the present invention): (Insulating layer 1d is PFA / jacket 1s is ETFE / sealing part 3 is PFA)- According to said structure, injection molding of the resin of a molten state higher temperature than the jacket 1s is performed. For this reason, since the integration is performed while improving the familiarity with the jacket 1s and melting the jacket 1s, the connection strength between the jacket 1s and the seal portion 3 can be improved.
- FIG. 12 is a perspective view showing the coaxial wiring body 10 according to Embodiment 3 of the present invention.
- FIG. 13 is a schematic view showing a state in which the coaxial wiring body 10 is fitted into the insertion slot of the key operation unit casing 20 or the display unit casing 30.
- the sealing device S is configured only by the seal portion 3 that is a resin molded body. That is, the surface 3 a of the seal portion 3 becomes the seal surface of the seal device S.
- Such a seal portion 3 is preferably an elastic body. If there is elasticity of the order of PFA or ETFE, the sealing device S can be configured with only the seal portion 3.
- sealing apparatus S since an O-ring is abbreviate
- FIG. 14 is a partially enlarged view of the coaxial wiring body 10 according to Embodiment 4 of the present invention.
- the sealing device S has the same configuration as that shown in FIG. 3, and a sealing portion 3 that is a resin molded body integrated with a plurality of coaxial wires 11 by injection molding, and the sealing portion 3 And an O-ring 13 wound around.
- a poreflon (registered trademark) tape 11 s made of Sumitomo Electric Industries, Ltd. made of PTFE (tetrafluoroethylene resin) is slanted or spirally formed. It is wound and constitutes a coating layer.
- the plurality of coaxial wires 11 may be about 40 at the maximum.
- the outer tape may not be wound, the slidability can be improved by winding the pore fron tape 11s, and the scattering of a large number of coaxial wires can be prevented.
- the reason why the pore flon tape 11s is wound to improve the slidability is that the coaxial line is hardly caught when the mold is clamped with a molding die.
- the point of this embodiment is characterized in that a resin having a MFR of 50 g / 10 min or more at a temperature of 190 ° C. and a nominal load of 2.16 kg is used for the resin forming the seal portion.
- Such a resin having a large MFR is usually a resin having a low melting point, and for example, an EMAA resin (melting point: 100 ° C.) can be used.
- FIG. 15 is a cross-sectional view of the seal portion 3 of the coaxial wiring body 10 shown in FIG.
- EMAA is used for the resin forming the seal portion 3.
- PFA melting point: 310 ° C.
- ETFE melting point: 260 ° C.
- a plurality of coaxial lines 1 are set in a molding die and the molding die is heated.
- the temperature is the melting point of the resin for injection molding, that is, the resin forming the sealing portion 3.
- the temperature is about 30 ° C higher.
- a molding die is heated to 130 ° C., and the molten EMAA is injection-molded by being heated to a temperature of 200 ° C.
- the resin ETFE forming the jacket 1s is higher by 50 ° C. or more than the heating temperature of 200 ° C. and the melting point of EMAA of 100 ° C.
- the ETFE having a melting point of about 260 ° C. forming the jacket 1s is not melted at the time of injection molding, and therefore the seal portion 3 and the jacket 1s are not fused on the contact surface.
- the state in which two different types of resins are in contact with each other on the contact surface and are not fused can be easily identified by an optical microscope, an electron microscope, or the like.
- the manufacturing method of the coaxial wiring body 10 shown in FIGS. 14 and 15 is the same as the manufacturing method of the first embodiment and the modification, and is manufactured by injection molding.
- a plurality of coaxial wires 1 (11) having connectors at both ends are prepared.
- the plurality of coaxial lines 1 (11) are usually arranged three-dimensionally.
- the predetermined part of the coaxial line is disposed in the molding die so that the coaxial line 11 passes through the predetermined position of the molding die.
- the molding die is heated to the melting point of the resin of the seal portion 3 or higher, for example, (melting point + 30 ° C.). Thereafter, a molten resin heated to about 200 ° C.
- the manufacturing method of the coaxial wiring body 10 shown in FIGS. 3 to 5 is only different in the heating temperature of the molding die and the temperature of the molten resin from the case of the coaxial wiring body 10 of the present embodiment. .
- FIG. 16 is a diagram showing the coaxial line 11 of the seal portion in the coaxial line wiring body according to the fifth embodiment of the present invention.
- the present embodiment is characterized in that the outer periphery of each coaxial line 1 is deleted and an annular concave portion 1m is formed.
- the concave portion 1m forms a lateral opening space 11k that opens the outside and the binding center portion.
- FIG. 17A is a cross-sectional view of a portion where three coaxial lines 1 are in contact
- FIG. 17B is a cross-sectional view of a portion where four coaxial lines 1 are in contact.
- the solid line is a cross-sectional view of the portion outside the concave portion 1m, and in both FIGS. 17A and 17B, the gap surrounded by the coaxial line is closed by the coaxial line, and the outside is in the lateral direction (coaxial It is not opened in the direction perpendicular to the line. For this reason, even if resin is injected from the outside and tries to pass to the binding center, it is difficult for the coaxial line itself to pass through the bound coaxial line.
- the bound coaxial line 11 has the same cross section as the solid line cross-sectional view at all portions. For this reason, if there is no concave part 1m, it is difficult to form the gap filling part through the bundled coaxial line.
- the closed gap in the bundled coaxial line 11 is continuous along the direction of the coaxial line. When the moisture enters the gap, the gap becomes a moisture path.
- the cross-sectional views of the broken lines in FIGS. 17A and 17B are cross-sectional views passing through the concave portion 1m.
- a lateral opening space 11k that passes from the outside to the inside of the coaxial line bound is formed.
- the lateral opening space 11k corresponds to a portion where the outer skin of the coaxial line 1 is deleted in an annular shape. It becomes easy to inject resin from the outside to the binding center through the lateral opening space 11k.
- the space thickness between adjacent coaxial lines becomes thicker as the depth of the concave portion 1m is larger.
- the path width of the lateral opening space 11k is increased, and the gap filling portion can be formed by injecting the resin into the interior with a small resistance and a margin. As a result, it is possible to eliminate a gap that may become a moisture path.
- the concave portion 1m is formed as follows. First, with respect to each coaxial line 1, the outer surface of the coaxial line (jacket 1s, etc.) is removed with, for example, a carbon dioxide laser to form a portion where the ground line 1g is exposed. At this time, it is not necessary to completely remove the jacket or the like, and it is sufficient that the step of the concave portion 1m can be provided. As described above, the seal portion 3 is formed by injecting the resin by placing the concave portion 1m so as to pass through the mold as described above. At the time of injection molding, the resin can reach the binding center through the lateral opening space 11k and form a gap filling portion between all the coaxial lines. As a result, a very strong waterproof coaxial wiring body can be obtained.
- FIG. 18 is a diagram showing the coaxial line 11 of the seal portion in the coaxial wiring body according to the sixth embodiment of the present invention.
- the present embodiment is characterized in that a convex portion 1n protruding in an annular shape is provided on the outer periphery of each coaxial line 1.
- the adjacent coaxial lines 1 are in contact with each other with the convex portions 1n, but the other portions have the convex portions 1n, so that a gap is generated.
- This gap forms a lateral opening space 11k that opens the outside and the binding center in the lateral direction.
- a lateral opening space 11k is formed in a portion other than the convex portion 1n, particularly in a portion adjacent to the convex portion 1n.
- the width between the coaxial lines of the lateral opening space 11k increases as the height of the convex portion 1n increases. For this reason, as the height of the convex portion 1n is higher, the resin can pass from the outside to the binding center portion with a smaller resistance during injection molding. As a result, it is possible to obtain a coaxial wiring body having high quality waterproofness.
- the coaxial line 1 having the convex portion 1n is formed by coating a resin that forms the convex portion 1n on the outer periphery or the outer skin. This coating is preferably performed by applying a resin dissolved in a solvent. A resin that does not dissolve in a general-purpose solvent may be dispersed. Alternatively, the coaxial wires may be arranged one by one and formed on the outer periphery of the coaxial wire by injection molding.
- FIG.19 (a) is a figure which shows the flat knitting wire 11h used for the coaxial wire body in embodiment of this invention.
- the knitting yarns 15 are alternately sewed and arranged so as to intersect (in the orthogonal direction) with respect to the plurality of coaxial lines 1 in parallel.
- the coaxial line 1 and the knitting yarn 15 form warps and wefts to form fibers.
- the coaxial line 1 may be anything.
- silver-plated copper alloy wires (7, diameter 0.025 mm, overall outer diameter 0.075 mm) are used as signal lines, and Sumiflon (registered trademark) A (thickness 0.05 mm, outer is used as the insulating layer.
- the knitting yarn 15 may be anything as long as it is an insulating wire.
- a polyester wire is used, and the knitting dimension is the number of cores 10 C, the standard pitch between lines is 0.33 mm, and the standard thickness is 0. .44 mm and width standard 3.40 mm.
- FIG. 19 (b) is a diagram showing the coaxial wiring body 10 in which the flat knitted wire 11h is rounded to form the coaxial wire assembly 11, and the seal portion 3 is provided by resin injection molding.
- a seal device S is formed by arranging an O-ring 13 in the seal portion 3.
- the flat knitted wire 11 h is surely formed with a gap by the knitting yarn 15, and the seal portion 3 is formed through the gap. For this reason, resin can be easily passed to the center of the round flat knitted wire 11h.
- the inside of the seal portion 3 is not short of resin, and it is possible to improve the resin filling property and prevent pores and the like.
- FIG. 20 is a diagram showing a method for manufacturing the coaxial wiring body according to the eighth embodiment of the present invention.
- FIG. 20A shows a state in which a plurality of coaxial wires 11 are set in a molding die for forming the seal portion 3.
- the mold portion 61 corresponds to a range where the seal portion 3 is not formed, and forms a portion where the coaxial line 11 is bound and exposed.
- the injected mold part 63 for forming the seal part 3 is sandwiched between the movable parts 65 from both sides with a gap h.
- the movable portion 65 binds the plurality of coaxial wires 11 together.
- FIG. 20A shows a state in which a plurality of coaxial wires 11 are set in a molding die for forming the seal portion 3.
- the mold portion 61 corresponds to a range where the seal portion 3 is not formed, and forms a portion where the coaxial line 11 is bound and exposed.
- the injected mold part 63 for forming the seal part 3 is sandwiche
- 20B is a diagram illustrating a state in which the movable portion 65 is brought close to the mold portion 63 of the seal portion, and the plurality of coaxial lines 11 are curved outward and bulged. In other words, a state where a plurality of coaxial lines is slackened is shown. The gap h is transferred (moved) to the outside of the movable portion 65 by the approach of the seal portion of the movable portion 65 to the mold portion 63. In the state of FIG. 20B, waiting for resin injection molding is awaited.
- the movable portion 65 does not need to be provided on both sides of the mold portion 63 of the seal portion, and may be only on one side.
- the movable portion 65 holds the plurality of coaxial lines 11, before the injection of the resin, the plurality of coaxial lines 11 covered by the seal portion 3 are curved and bulge as shown in FIG. . In other words, sagging occurs.
- the outer diameters of the plurality of coaxial wires 11 in the gripped and bound portion are Do
- the outer diameter of the curved and bulged portion is D1, and D1> Do is satisfied.
- the gap between the coaxial lines can be increased in the periphery of the outer diameter D1 as compared to the portion that is grasped and bound.
- the resin filling property of the seal portion 3 can be improved by introducing the resin through the gap, and pores and the like can be prevented.
- the moving distance that is, the length of the gap h is preferably about 0.5 mm to 1 mm, for example.
- the amount of bulging is slightly exaggerated, and D1 is drawn a little excessively compared to Do.
- the coaxial line 11 does not have to be axially symmetric with respect to the central axis of the plurality of coaxial lines 11, and the coaxial line 1 near the center is curved to one side as shown in FIG. Is normal.
- the entire plurality of coaxial wires 11 may be curved to one side. By curving and bulging, there will always be a portion where the distance between the coaxial lines becomes large even if it curves to one side. Through this increased interval, the resin easily reaches the vicinity of the central coaxial line.
- the coaxial wiring body 10 was actually manufactured and the filling property of the gaps of the coaxial line was evaluated.
- the specimens of the inventive examples and comparative examples were produced under the following conditions. Comparative example: coaxial line 0.22 mm ⁇ ⁇ 40 (total diameter 1.9 mm), resin ETFE of seal part (trade name Fullon (registered trademark) -88AXMP manufactured by Asahi Glass Co., Ltd.)
- Example of the present invention Coaxial wire 0.22 mm ⁇ ⁇ 40 (total diameter 1.9 mm), resin EMAA of seal part (Mitsui-DuPont Chemical Co., Ltd.
- EMAA (1) Nucrel N1110H
- EMAA (2) Nucrel N1050H EMAA (1) or Nucrel N1110H as described above, and EMAA (2)
- Nucrel N1050H has the characteristics shown in Table 1 for MFR.
- the same five specimens were manufactured for the comparative example and the two examples of the present invention.
- As the molding die a die having a total diameter of 1.9 mm is used. In the comparative example, the molding die is heated to 290 ° C., and in the present invention example, the molding die is heated to 130 ° C., and each is in a molten state. Resin was injected into the mold.
- the MFR shown in Table 1 is MFR according to JIS K7210 at a temperature of 190 ° C. and a nominal load of 2.16 kg for EMAA, and MFR according to ASTM D-3159 for ETFE.
- the magnitude of the gap generation in the coaxial line gap can be arranged by MFR.
- ETFE with an MFR of 20 g / 10 min, many voids were generated in the coaxial line gap.
- the evaluation is “x”.
- EMAA (1) having an MFR of 100 g / 10 min, a void was observed in one of the three cross sections for one of the five specimens.
- the evaluation is “ ⁇ ”.
- the best is EMAA (2) with an MFR of 500 g / 10 min, and no voids were observed in any of the five specimens. The evaluation is “ ⁇ ”.
- the waterproofness at the insertion port of the housing can be secured, and the number of parts can be suppressed while downsizing and simplifying the structure of the hinge and its surroundings. Furthermore, by using a resin with a large MFR for the seal portion, even if the number of coaxial wires is very large, the resin can be reliably filled up to the center portion, and a high level of waterproofness with excellent durability can be obtained. be able to.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Insulated Conductors (AREA)
- Manufacturing Of Electric Cables (AREA)
- Communication Cables (AREA)
Abstract
Description
上記の構成では、複数の同軸線は、シール部において間隙充填部および周縁部に重複されるだけで、この部分は電子機器内では筐体の挿入口に嵌め込まれて固定される部分であるので、断面積は増大しない。また、シール部以外の部分では同軸線は裸(捻回された複数同軸線の状態を固定するための粘着テープ等は巻かれる)であるが、外被のジャケットは絶縁樹脂製であり、防水性・撥水性があるので、全体の防水性は確保される。したがって、同軸線をシース(被覆)するためのチューブなどを用いる必要がなく、部品点数を減らすことができる。この結果、ヒンジ構造およびその周辺部の構造を簡単化かつ小型化することができる。
なお、通常、防水のためのシール部は防塵も兼ねることができる。以後、防塵については触れないが、防水に付随して、当然、防塵作用を得ることができる。また、上記の同軸線配線体では、シール装置を構成するためのシール部は、1つでもよいし、2つ以上であってもよい。
シール部にPFAを用いる場合、ジャケットはPFA、またはETFEの同軸線を用いるのがよい。この組み合わせによれば、ジャケットに連続して、ジャケットと同じ材質か、またはジャケットよりも融点の高い材質で射出成形により一体化してシール部を形成することができる。このため、間隙充填部および周縁部とジャケットとの接続を確実に行うことができる。すなわちジャケットと、シール部との接続強度を向上させることができる。
シール部にETFEを用いる場合、ジャケットにはETFEを用いた同軸線を用いるのがよい。これにより、同じ材料で、ジャケットおよびシール部を形成することになり、同材接続による利点を得ることができる。
両方の場合ともに、シール部を形成する樹脂は、高周波誘電率が低いので、高周波信号の劣化防止に資することができる。
図1は、本発明の実施の形態1における同軸線配線体が用いられる電子機器である携帯電話機50を示す図である。図1において、携帯電話機50は、ヒンジ構造40で連結された、キー操作部筐体20と、表示部筐体30とを備える。図1(a)において、表示部筐体30は裏面をおもてにしてキー操作部筐体20の上に閉じている。表示部筐体30は、ヒンジ構造40のX軸周りおよびY軸周りに回動可能である。図1(b)は、表示部31を含む表示部筐体30をヒンジ構造40のX軸周りに回動させて、開いた状態を示す図である。キー21がキー操作部筐体20に配列されている。キー21の操作による電気信号は、キー操作部筐体20内の配線回路(図示せず)から、表示部筐体30内の配線回路(図示せず)へと伝達される。この電気信号の伝達に、これから説明する同軸線配線体が用いられる。図1(b)において、ヒンジ構造は、Y軸回転軸機構のカバー41を中央にして、左側のA部は、X軸回転軸機構を含む部分であり、右側のB部は、表示部筐体30とキー操作部筐体20とを導電接続する、上記の同軸線配線体が収納される部分、である。A部およびB部は、中央部のカバー41を中心にしてY軸周りに回動する。図1(c)は、表示部筐体30をY軸周りに180°回動させ、B部を左側に、A部を右側にして、また、図1(a)の状態からX軸周りにも回動させて、表示部31をおもて側にして表示部筐体30をキー操作部筐体20に重ねて閉じた状態を示す。
ヒンジ構造では、中央カバー41の下のY軸回転軸機構の軸部は円筒状であり、キー操作部筐体20に固定されている。表示部筐体30は、Y軸周りに回動するとき、円筒状部分の周りに回動するが、ヒンジ構造に含まれるX軸回転軸機構Aおよび同軸線配線体の収納部Bも、表示部筐体30とともにY軸の周りに回動する。この円筒状の部分(内筒)が同軸線配線体10の挿入口になっている。
同軸線配線体10は、その両端にコネクタ19が取り付けられている。同軸線配線体10は、表示部筐体30に設けた挿入口に、防水性のシール装置Sを嵌め込み、同軸線配線体の収納部Bを経由して、ヒンジ構造のY軸回転軸機構に含まれる円筒部(キー操作部筐体20に開口)の挿入口に、もう一方のシール装置Sを嵌め込んでいる。上記のように、X軸およびY軸の周りに回動できる二軸ヒンジ構造40によって連結された2つの筐体20,30間を防水性を確保した上で導電接続するのに、本実施の形態における同軸線配線体10は非常に適している。すなわち、同軸線配線体の収納部Bには、複数の同軸線がそのまま(捻回および粘着テープによる捻回状態の固定はある)の状態で配置され、チューブ等のシース部品は用いなくてよい。このため、収納部Bを小型化し、かつ配線体挿入口の構造についても簡単化することができる。なお、同軸線には、極細同軸線を用いるのがよい。
図4は、上記の同軸線配線体10を、キー操作部筐体20または表示部筐体30の挿入口に嵌め込んだ状態を示す模式図である。筐体20または30の挿入口に嵌め込まれたシール装置Sは、ヒンジ構造40が水に濡れても、筐体内25または35へは、水を侵入させない。複数の同軸線11は、外被であるジャケットは絶縁性の樹脂で形成されるので、撥水性があり、水に濡れても、ジャケット自体が侵入経路となることはない。
本実施の形態では、シール部3にはOリング用の溝が設けられ、表面3aに対して溝底面3bを持つ。溝にはOリング13が巻き付けられる。Oリング13を用いることで、シール装置Sを直接構成する部分の寸法精度などの緩和をはかりながら、確実な防水性を得ることができる。
なお、図5(b)では、複数の同軸線11として7本の同軸線を示しているが、通常は数十本、たとえば40本程度の同軸線を用いる。この場合、極細同軸線は、同軸線配線体10を小型化する上でとくに望ましい。
シール部3の周縁部3sは、複数の同軸線11を取り囲んで、信頼性の高いシール装置Sを形成する上で、必須である。
図7は、実施の形態1に対する変形例(本発明例である)の同軸線配線体10を示す斜視図である。図8は、図7のシール装置SのOリングを含む横断面図である。また、図9は、Oリングを除いた、図8の部分拡大図である。この変形例(本発明例である)の同軸線配線体10では、同軸線(極細同軸線)1は、フラット配置されている。このような、フラット配置では、同軸線1の間の間隙が内奥に位置せず、外から見える箇所に位置する。このため、図9に示すように、射出成形の際に、間隙充填部3jを確実かつ容易に形成することができる。このため、平板表面状になる周縁部3sの性状に多くの注意を払いながら、縦方向(同軸線の延在方向)に気密性の高いシール部3を容易に製造することができる。
要約すれば、図7~図9に示す、変形例の同軸線配線体10は、完全な充填という点で困難性を伴う間隙充填部3jを、高い信頼性のもとに、容易に形成することができる点に特徴を有する。
上述の製造方法は、とくに同軸線11を湾曲させるものではなく、ストレートタイプの同軸線配線体10の製造方法である。次に、図7~図9に示す同軸配線体10と同じフラット配置であるが、同軸線11が湾曲したタイプの同軸線配線体10の製造方法について説明する。図10(a)は、出来上がりの同軸線配線体10を湾曲したものにすることを目的にして配置した、コネクタ19を両端に持つ、複数の同軸線11を示す図である。平面状に配列した同軸線は、一方側へと順に長いものが配置されて、外側に順に大きく湾曲している。このような複数の同軸線11を捻回すると、一方側に凸状に湾曲する捻り線11が得られる。これを、粘着テープ等を巻いて、湾曲した捻り状態を固定する。すなわち、金型内に配置する時点で、既に湾曲状態が形成されていて、この湾曲した捻り状態は粘着テープ等によって固定される。シール部3の射出成形では、上記の捻回した同軸線11を、金型の所定位置を通り抜けるようにして、当該同軸線の所定部分を、湾曲の向き等を考慮に入れて金型内に配置する。その後、樹脂導入口であるゲートを経由させて金型内へ、溶融状態の樹脂をノズルから所定の圧力で射出する。冷却した後、金型から取り出した同軸線配線体10を、図10(b)に示す。上述したように、金型内に配置する際の向き、姿勢等によって、湾曲の向き決めることができる。
本実施の形態の同軸線配線体によれば、複数の同軸線は、シール部において間隙充填部および周縁部に重複されるだけである。この部分は電子機器内では筐体の挿入口に嵌め込まれて固定される部分であり、断面積は増大しない。また、シール部以外の部分では同軸線は裸であるが、ジャケットは絶縁樹脂製であり、防水性・撥水性があるので、全体の防水性は確保される。したがって、同軸線をシースするチューブなどを用いる必要がなく、ヒンジ構造を簡単化かつ小型化することができる。また、部品点数の削減もできる。
図11は、本発明の実施の形態2における同軸線配線体10を示す断面図である。同軸線1は、フラット配置である。本実施の形態2の同軸線配線体10では、同軸線1の絶縁層1dの樹脂をPFA、ジャケット1sの樹脂をETFEとして、シール部3の樹脂をETFEとした点に特徴を有する。このような材料構成により、次の利点を得ることができる。
(1)絶縁層1dを形成するPFAの融点は310℃であり、シール部3の樹脂のETFEの融点260℃より50℃程度高い。このため、ETFEの射出成形のとき、絶縁層1dの変形等の劣化を防止することができる。
(2)ジャケット1sのETFEと、シール部3のETFEは同じ樹脂であり、射出成形によって一体化は同材接続となる。このため、接続一体化をスムースに行うことができ、かつ接続強度を高くすることができる。
図示はしないが、図11に示す同軸配線体10の変形例(本発明例である)として次のものがある。
-変形例1(本発明例):( 絶縁層1dがPFA/ジャケット1sがETFE/シール部3がPFA)―
上記の構成によれば、ジャケット1sよりも高温の溶融状態の樹脂の射出成形が行われる。このため、ジャケット1sとのなじみを良くして、またジャケット1sを溶融させながら、一体化が行われるので、ジャケット1sとシール部3との接続強度を向上させることができる。また、ジャケット1sが介在した状態で、絶縁層1dと同じ樹脂のPFAが、溶融状態で射出されるので、絶縁層1dは、ジャケット1sを介在させて過渡的に高温状態に一時的にさらされるだけである。このため、シール部3を形成する溶融状態の樹脂の温度制御等を精密に行うことで、絶縁層の変形を避けることが可能である。
上記の構成によれば、ジャケット1sと同じ樹脂の射出成形が行われる。このため、射出成形によって一体化は同材接続となる。このため、接続一体化をスムースに行うことができ、かつ接続強度を高くすることができる。また、ジャケット1sが介在した状態で、絶縁層1dと同じ樹脂のPFAが、溶融状態で射出されるので、絶縁層1dは、ジャケット1sを介在させて過渡的に高温状態に一時的にさらされるだけである。このため、シール部3を形成する溶融状態の樹脂の温度制御等を精密に行うことで、絶縁層の変形を避けることが可能である。
図12は、本発明の実施の形態3における同軸線配線体10を示す斜視図である。また、図13は、上記の同軸線配線体10を、キー操作部筐体20または表示部筐体30の挿入口に嵌め込んだ状態を示す模式図である。本実施の形態では、シール装置Sは樹脂成形体であるシール部3のみによって構成される。すなわち、シール部3の表面3aがシール装置Sのシール面となる。このようなシール部3は、弾性体であることが望ましい。PFAまたはETFE程度の弾性があれば、シール部3のみでシール装置Sを構成することができる。
上記のシール装置Sによれば、Oリングを省略するため部品点数を削減することができる。このため、実施の形態1におけるヒンジおよびその周辺部の構造の簡単化および小型化の利点を得ながら、経済性に優れた同軸線配線体10を得ることができる。
図14は、本発明の実施の形態4における同軸線配線体10の部分拡大図である。この同軸線配線体10では、シール装置Sは、図3に示す構成と同じであり、複数の同軸線11に射出成形により一体化された樹脂成形体であるシール部3と、そのシール部3に巻き付けられたOリング13とで構成される。シール部3以外の、複数の同軸配線体11の外周には、PTFE(四フッ化エチレン樹脂)からなる住友電気工業(株)製のポアフロン(登録商標)テープ11sが斜めに、またはらせん状に巻かれて、被覆層を構成している。複数の同軸線11は、最大40本程度になる場合がある。外皮のテープは巻かなくてもよいが、ポアフロンテープ11sを巻くことで、摺動性が高くなり、多数本の同軸線のばらけを防止することができる。ポアフロンテープ11sを巻いて摺動性を向上させるのは、成形金型で型締めする際に同軸線が巻き込まれにくくなるからである。
本実施の形態のポイントは、シール部を形成する樹脂に、温度190℃および公称荷重2.16kgにおけるMFRが50g/10min以上の樹脂を用いている点に特徴を有する。このようにMFRが大きい樹脂は、通常、融点が低い樹脂であり、たとえばEMAA樹脂(融点100℃)を用いることができる。
図3~図5に示す同軸線配線体10の製造方法は、成形金型の加熱温度、および溶融状態の樹脂の温度が、本実施の形態の同軸線配線体10の場合と異なるだけである。
図16は本発明の実施の形態5の同軸線配線体におけるシール部の同軸線11を示す図である。本実施の形態では、個々の同軸線1の外周が削除されて環状の凹状部1mが形成されている点に特徴を有する。結束された同軸線集合体11において、凹状部1mは、外部と結束中心部とを開通する横方向開通スペース11kを形成する。図17(a)は3本の同軸線1が接する部分の断面図であり、図17(b)は4本の同軸線1が接する部分の断面図である。
実線は、凹状部1mを外れた部分の断面図であり、図17(a)および(b)ともに、同軸線で囲まれた間隙は同軸線に閉ざされており、外部とは横方向(同軸線に直交する方向)には開通していない。このため、外部から樹脂を射出して結束中心まで通そうとしても、同軸線自体に阻まれて、結束された同軸線の内部に通すことは難しい。凹状部1mがない場合、結束された同軸線11は、すべての部分で、実線の断面図と同じ断面となる。このため、凹状部1mがないと、結束された同軸線の内部に通して、間隙充填部を形成することが難しい。結束された同軸線11における閉ざされた間隙は、同軸線方向に沿って連続しており、水分がこの間隙に侵入すると、間隙は水分の経路となる。
図18は、本発明の実施の形態6の同軸線配線体におけるシール部の同軸線11を示す図である。本実施の形態では、個々の同軸線1の外周に環状に突き出る凸状部1nを設けた点に特徴を有する。結束された同軸線集合体11では、隣り合う同軸線1は、凸状部1n同士接するが、その他の部分では凸状部1nがあるため、空隙が生じる。この空隙は、外部と結束中心部とを横方向に開通する横方向開通スペース11kを形成する。本実施の形態では、凸状部1n以外の部分、とくに凸状部1nに隣接する部分に、横方向開通スペース11kができる。この横方向開通スペース11kの同軸線間の幅は、凸状部1nの高さが高いほど広くなる。このため、凸状部1nの高さが高いほど、射出成形のとき、樹脂は小さい抵抗で、外部から結束中心部にまで通ることができる。その結果、高品質の防水性を備えた同軸線配線体を得ることができる。
図19(a)は、本発明の実施の形態における同軸線配線体に用いる平編み線11hを示す図である。平編み線11hでは、並行する複数の同軸線1に対して交差するように(直交方向に)編み糸15が、交互に縫って配置されている。この結果、同軸線1と編み糸15とが縦糸と横糸のようになって繊維を形成する形態をとる。同軸線1はどのようなものでもよい。一例を挙げれば、信号線には銀めっき銅合金線(7本、径0.025mm、全体外径0.075mm)を、絶縁層にはスミフロン(登録商標)A(厚さ0.05mm、外径0.18mm)を、グランド線には錫めっき銅合金線(素線径0.03mmの横巻き、21±2本、ピッチ4.5±1.5mm)を、またジャケットにはスミフロン(登録商標)A(厚さ0.04mm、外径0.31mm)を、それぞれ用いることができる。また、編み糸15には、絶縁性の線であれば何でもよいが、一例をあげると、ポリエステル線を用い、編みのディメンションは、心数10C、線間ピッチ標準0.33mm、厚さ標準0.44mm、幅標準3.40mm、とするのがよい。
図20は、本発明の実施の形態8における同軸線配線体を製造する方法を示す図である。図20(a)は、複数の同軸線11をシール部3を形成するための成形金型にセットした状態を示す。金型部分61は、シール部3が形成されない範囲に対応しており、同軸線11が結束されて露出する部分を形成する。シール部3を形成するための射出される型部分63は、空隙hをあけて、両側から可動部65に挟まれている。可動部65は複数の同軸線11を結束している。図20(b)は、可動部65をシール部の型部分63に接近させ、複数の同軸線11を、外側に湾曲させて膨出させた状態を示す図である。換言すれば、複数の同軸線をたるませた状態を示す。可動部65のシール部の型部分63への接近によって、空隙hは可動部65の外側に振り替わる(移動する)。図20(b)の状態で、樹脂の射出成形を待つ。なお、可動部65は、シール部の型部分63の両側に設ける必要はなく、片側だけであってもよい。
D1をDoからどれだけ大きくするかは、空隙hの長手方向寸法で調節することができる。移動距離すなわち空隙hの長さは、たとえば0.5mm~1mm程度とするのがよい。図21は、膨出量を少し誇張して、D1をDoに比べて少し過大に描いている。湾曲して膨出した部分において、複数の同軸線11の中心軸線に関して、同軸線11は軸対称である必要はなく、図21に示すように、中心付近の同軸線1は一方側に湾曲するのが普通である。複数の同軸線11全体が、一方の側に湾曲してもよい。湾曲して膨出することで、たとえ一方側に湾曲しても、同軸線間の間隔は大きくなる部分が必ず生じる。この大きくなった間隔を通って、樹脂は中心の同軸線付近に到達しやすくなる。
比較例:同軸線0.22mmφ×40本(トータル径1.9mm)、シール部の樹脂ETFE(旭硝子(株)社製商品名フルオン(登録商標)-88AXMP)
本発明例:同軸線0.22mmφ×40本(トータル径1.9mm)、シール部の樹脂EMAA(三井・デュポンケミカル(株)製ニュクレル(登録商標))
EMAAについて2種類用いた。EMAA(1):ニュクレルN1110H、およびEMAA(2):ニュクレルN1050H
上記のEMAA(1)またはニュクレルN1110H、およびEMAA(2)
またはニュクレルN1050Hは、それぞれMFRが表1に示す特性を有する。比較例および2種類の本発明例について、それぞれ、同じ5体の試験体を製造した。
成型金型は、トータル径1.9mmに合う金型を用い、比較例では成型金型を290℃に加熱し、本発明例では成形金型を130℃に加熱して、それぞれ溶融状態にある樹脂を成形金型内に射出した。その後、40℃まで冷却して、成型金型を外した。それぞれの試験体のシール部3の横断面を、1試験体につき、3箇所採取して、光学顕微鏡で観察した。結果を表1に示す。表1に示すMFRは、EMAAについては、温度190℃、公称荷重2.16kgにおけるJIS K7210に拠るMFRであり、ETFEについては、ASTM D-3159に拠るMFRである。
上記の結果より、上記のMFRを50g/10min以上とする樹脂をシール部に用いることで、多数の同軸線の間隙をすべて樹脂で充填することができ、耐久性に優れた高いレベルの防水性を得ることができる。
Claims (20)
- 複数の同軸線と、
前記複数の同軸線と一体化するように形成されたシール部とを備え、
前記シール部は、前記複数の同軸線の間隙を充填する間隙充填部と、前記複数の同軸線を取り囲む周縁部とを有することを特徴とする、同軸線配線体。 - 前記同軸線の前記シール部が形成された部分において、該同軸線の外周を削除した凹状部または外周を覆うように突き出る凸状部が設けられており、前記一体化された複数の同軸線間において各同軸線の前記凹状部または凸状部による、外部と開通する横方向開通スペースが生じ、前記シール部が、該横方向開通スペースを通るように形成されていることを特徴とする、請求項1に記載の同軸配線体。
- 前記複数の同軸線が、複数の同軸線を交互に縫って編んだ編み糸を有する平編み同軸線であり、その平編み同軸線が、平編み帯状、または、環状若しくはらせん状に丸められており、前記シール部が、前記編み糸によって形成された同軸線の間隙を通るように形成されていることを特徴とする、請求項1に記載の同軸配線体。
- 前記シール部が形成された部分の前記複数の同軸線が、相互に離れるように湾曲して膨出することで膨出離間部分を形成しており、前記シール部が、該膨出離間部分の同軸線の間を通るように形成されていることを特徴とする、請求項1に記載の同軸配線体。
- 前記シール部の周縁部の外周に、Oリングを装入するための溝が設けられていることを特徴とする、請求項1~4のいずれか1項に記載の同軸線配線体。
- 前記シール部の周縁部の外周面をシール面とすることを特徴とする、請求項1~4のいずれか1項に記載の同軸線配線体。
- 前記シール部を形成する樹脂は、温度190℃および公称荷重2.16kgにおけるMFR(メルトフローレイト(JIS K7210))が50g/10min以上であることを特徴とする、請求項1~6いずれか1項に記載の同軸線配線体。
- 前記シール部を形成する樹脂が、前記同軸線のジャケットの樹脂よりも融点が低い樹脂であることを特徴とする、請求項1~7のいずれか1項に記載の同軸線配線体。
- 前記同軸線と前記シール部とは接触面において融着していないことを特徴とする、請求項1~8のいずれか1項に記載の同軸線配線体。
- 前記シール部を形成する樹脂が、エチレン-メタクリル酸共重合樹脂(EMAA樹脂)であることを特徴とする、請求項7~9のいずれか1項に記載の同軸線配線体。
- 前記シール部を形成する樹脂が、前記同軸線の信号線とグランド線とを絶縁する絶縁層と同じ樹脂か、または前記絶縁層の樹脂よりも融点が低い樹脂であることを特徴とする、請求項1~6のいずれか1項に記載の同軸線配線体。
- 前記シール部を形成する樹脂が、前記同軸線のジャケットと同じ樹脂か、または前記ジャケットの樹脂よりも融点が高い樹脂であることを特徴とする、請求項10に記載の同軸線配線体。
- 前記シール部を形成する樹脂が、PFA(テトラフルオロエチレン・パーフルオロアルキルビニルエーテル共重合体)またはETFE(テトラフルオロエチレン・エチレン共重合体)であることを特徴とする、請求項11または12に記載の同軸線配線体。
- 前記シール部において、前記複数の同軸線が、面状にフラット配置、または、断面円状もしくは楕円状に束ねたバンドル配置、されていることを特徴とする、請求項1~13のいずれか1項に記載の同軸線配線体。
- 前記シール部が、1箇所または2箇所に設けられていることを特徴とする、請求項1~14のいずれか1項に記載の同軸線配線体。
- 請求項1~15のいずれか1項に記載の同軸線配線体を用いたことを特徴とする、電子機器。
- 複数の同軸線と、前記複数の同軸線と一体化するように形成されたシール部とを備える同軸線配線体を製造する方法であって、
成形金型を準備する工程と、
前記成形金型に前記複数の同軸線をセットしながら、該成形金型を前記シール部の樹脂の融点以上の温度に加熱する工程と、
前記シール部を形成する、溶融状態の樹脂を、前記成形金型に射出する工程と、
前記シール部の樹脂を射出成形したまま、前記金型を前記樹脂の融点以下の所定温度に冷却する工程とを備えることを特徴とする、同軸配線体の製造方法。 - 前記複数の同軸線のおのおのの、前記シール部を形成する部分に、該同軸線の外周を削除した凹状部または外周を覆うように突き出る凸状部を設ける工程を備えることを特徴とする、請求項17に記載の同軸配線体の製造方法。
- 前記複数の同軸線を複数の同軸線を交互に縫って編んだ編み糸を有する平編み同軸線として、その平編み同軸線を、平編み帯状のまま、又は、環状若しくはらせん状に丸めて、前記成形金型にセットすることを特徴とする、請求項17に記載の同軸配線体の製造方法。
- 前記成形金型において、前記シール部を形成するための樹脂を射出する型部分に隣り合う両側又は一方側に、前記複数の同軸線をつかんで前記射出する型部分に対する距離を変えられる可動部を設け、成形金型に複数の同軸線をセットしたとき可動部を、複数の同軸線をつかんで前記射出する型部分から離しておき、前記樹脂を射出する前に前記可動部を前記射出する型部分に近づけて前記複数の同軸線を相互に離れるように湾曲して膨出させて膨出離間部分を形成しておくことを特徴とする、請求項17に記載の同軸配線体の製造方法。
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WO2012120639A1 (ja) * | 2011-03-08 | 2012-09-13 | 矢崎総業株式会社 | フラットケーブル及びワイヤハーネス |
WO2012120640A1 (ja) * | 2011-03-08 | 2012-09-13 | 矢崎総業株式会社 | フラットケーブル及びワイヤハーネス |
KR101248819B1 (ko) | 2011-06-20 | 2013-04-01 | 한국표준과학연구원 | 열전달 차단기능을 갖는 동축형 전송선로 |
CN103081032A (zh) * | 2010-09-02 | 2013-05-01 | 株式会社藤仓 | 电缆组件的制造方法 |
JP2016207642A (ja) * | 2015-04-15 | 2016-12-08 | 矢崎総業株式会社 | ワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法 |
US10361543B2 (en) | 2015-04-15 | 2019-07-23 | Yazaki Corporation | Method for manufacturing wire harness |
WO2021160420A1 (de) * | 2020-02-14 | 2021-08-19 | Kromberg & Schubert GmbH Cable & Wire | Mediendichte einzeladerleitung |
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JP2016207642A (ja) * | 2015-04-15 | 2016-12-08 | 矢崎総業株式会社 | ワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法 |
US10361543B2 (en) | 2015-04-15 | 2019-07-23 | Yazaki Corporation | Method for manufacturing wire harness |
WO2021160420A1 (de) * | 2020-02-14 | 2021-08-19 | Kromberg & Schubert GmbH Cable & Wire | Mediendichte einzeladerleitung |
Also Published As
Publication number | Publication date |
---|---|
JP5510445B2 (ja) | 2014-06-04 |
KR20110119519A (ko) | 2011-11-02 |
TW201041259A (en) | 2010-11-16 |
CN102037522A (zh) | 2011-04-27 |
CN102037522B (zh) | 2014-05-07 |
JPWO2010095334A1 (ja) | 2012-08-23 |
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