JP5510445B2 - Coaxial wire wiring body, manufacturing method thereof, and electronic device - Google Patents

Description

  The present invention relates to a coaxial wire wiring body, a manufacturing method thereof, and an electronic device. For example, in an electronic device having a mechanism for conductively connecting two casings connected by a hinge with a coaxial wire, 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.

  In an electronic device such as a mobile phone, 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. In recent years, these electronic devices have been required to be waterproof. In particular, as mobile phones are used more frequently in pools and bathrooms, there is a need for waterproofing at the portion of the wiring body insertion opening provided in the housing. Is required. In the case of 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. There are many. In order to give waterproofness to a mobile phone having two housings connected by a biaxial hinge structure, a tube that connects the housings in an airtight manner, and wiring of the housing attached to the end of the tube There has been proposed a structure including a cylindrical seal member fitted into a body insertion port and an O-ring wound around the cylindrical seal member (Patent Document 1). The O-ring is inserted into the wiring body insertion port of the housing while being wound around the cylindrical seal member. The coaxial line passes between the two housings through the tube passing through the hinge structure. Since the coaxial line does not go out of the tube between the two casings, even if the hinge structure gets wet with water, water can be prevented from entering the casing through the coaxial line.

JP 2008-263285 A

  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. As a result, depending on the number of wiring bodies, 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 is 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 sealing portion, possess a gap filling unit for filling the gaps of a plurality of coaxial lines, and a peripheral portion surrounding the plurality of coaxial lines, in the peripheral portion of the seal portion, the O-ring instrumentation on the outer circumference of the peripheral edge portion Is provided with a groove for entering, or the outer peripheral surface of the peripheral portion is a sealing surface, and the resin forming the sealing portion is at a temperature of 190 ° C. and a nominal load of 2.16 kg. The MFR (melt flow rate (JIS K7210)) is 50 g / 10 min or more, and the resin forming the seal portion is a resin having a lower melting point than the resin of the coaxial line jacket. There, characterized in that said that you have to form a peripheral edge contour is formed in one piece with the same resin.

According to the above configuration, for example, by inserting the seal portion into the wiring insertion port of the casing, water can be prevented from entering the casing through the coaxial line, A coaxial line can be provided in the electrical circuit. In addition, 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. In the present invention, broadly, the contact surface between the seal portion and the plurality of coaxial lines may be melted and fused, or may not be fused.
In the above configuration, 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. In addition to the seal part, 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. Therefore, it is not necessary to use a tube for sheathing (coating) the coaxial line, and the number of parts can be reduced. As a result, the hinge structure and the peripheral structure can be simplified and reduced in size.
In general, 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. In the coaxial wiring body described above, the number of seal portions for constituting the seal device may be one, or two or more.

  In the portion where the seal portion of the coaxial line is formed, 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. If there is no concave or convex part, when the resin is injected to form the seal part, even if there is a gap between the resin inside, it is sealed by the coaxial line itself, Intrusion is blocked by the bound coaxial lines. For this reason, 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. However, if there is a concave or convex portion locally, even in the case of a bundled coaxial line, a lateral opening space is generated, and the resin can reach from the outside to the binding center through the lateral opening space. Can do. In the case of a concave portion, the deleted portion becomes a lateral opening space. On the other hand, in the case of a convex part, the convex part hits each other, and the space | gap which becomes a horizontal direction opening space is made in the part adjacent to a convex part. As a result, 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. Here, 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. It should be noted that 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.

The outer peripheral surface of the peripheral edge of the seal portion, Ru a groove for loading the O-ring. Thereby, airtightness with the housing | casing surface of a wiring body insertion port is securable with an O-ring. In this case, the resin of the seal portion may be an elastic body or may not be an elastic body.

Or, you the outer peripheral surface of the peripheral portion of the seal portion of the upper SL and sealing surface. Thereby, the number of parts can be further reduced without using an O-ring or the like. In this case, the resin of the seal part is desirably an elastic body.

The resin forming the seal portion, MFR at a temperature 190 ° C. and a nominal load of 2.16 kg (melt flow rate (JIS K7210)) is shall be the 50 g / 10min or more resins. 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.

The resin forming the seal portion, shall be the lower melting point than the resin of the coaxial line of the jacket resin. As a result, 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.

  In the above case, it is preferable that 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. Thereby, 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. Typically, 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.
When PFA is used for the seal portion, it is preferable to use PFA or ETFE coaxial wire as the jacket. According to this combination, 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.
When ETFE is used for the seal portion, it is preferable to use a coaxial line using ETFE for the jacket. Thereby, a jacket and a seal part are formed with the same material, and the advantage by the same material connection can be acquired.
In both cases, 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.

  In the above-described seal portion, 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. As a result, a seal portion having an appropriate cross-sectional shape can be formed according to the model of the electronic device. In the case of bundle arrangement, the surface area can be reduced to form a coherent seal part shape. In the case of the flat arrangement, since 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.

  A seal part can be provided in 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. As an example of 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, In addition, 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 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 mold, and a step of cooling the mold to a predetermined temperature not higher than the melting point of the resin while the resin of the seal portion is injection-molded . 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, and a plurality of coaxial lines are grasped to change the distance to the injection mold part, and a plurality of molding molds are provided. When setting the coaxial line, keep the movable part away from the mold part that injects the plurality of coaxial lines and puts the coaxial part close to the mold part that injects the movable part before injecting the resin. Curve and bulge away to bulge Wherein the previously formed between parts.

By the above method, airtightness at the contact surface between the coaxial line and the seal portion can be ensured while flowing the resin for forming the seal portion in the gap between the plurality of coaxial lines to eliminate the gap. 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. When importance is attached to the flow of resin into the gaps of many coaxial lines, 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. However, the airtightness between the jacket and the seal portion can be ensured while filling a large number of coaxial line gaps, and a high level of waterproofness excellent in durability can be obtained. In addition, cooling of said metal mold | 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).

  Each of the plurality of coaxial wires can be provided with a step of forming a concave portion from which the outer skin of the coaxial line is removed or a convex portion protruding so as to cover the outer skin at a portion forming the seal portion. As a result, 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. As a result, in the resin injection step, the gap filling portion can be formed through the resin to the binding center portion.

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.

In the molding die, 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. When multiple coaxial lines are set in the mold, move the movable part away from the mold part that injects and injects multiple coaxial lines, and closes the mold part that injects the movable part before injecting the resin. the in to curved by bulging away from each other to form a bulging spaced portions contact Ku. 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. As a result, it is possible to prevent pores and the like from being generated in the seal portion, increase the degree of resin filling, and improve water tightness.

  According to the present invention, 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.

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 | positioning structure of the coaxial wiring body in the mobile telephone of FIG. It is a perspective view which shows the coaxial wiring body in Embodiment 1 of this invention. It is a schematic diagram which shows the arrangement | positioning structure of the coaxial wiring body in this Embodiment. 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. 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. It is the elements on larger scale of 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. It is a schematic diagram which shows the arrangement structure of the arrangement structure of the coaxial wire body shown in FIG. It is a perspective view which shows the coaxial wiring body in Embodiment 4 of this invention. It is a cross-sectional view of the seal part of the coaxial wiring body shown in FIG. It is a figure which shows the coaxial line aggregate | assembly in the coaxial line wiring body of Embodiment 5 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 | assembly in the coaxial line wiring body of Embodiment 6 of this invention. FIG. 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 of manufacturing a coaxial wiring body according to an eighth embodiment of the present invention, where (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 | mold part to be inject | emitted, and the several coaxial line was curved outward and bulged. It is a figure which shows the some coaxial line which curved and expanded before injection | emission of the resin of a seal | sticker part.

(Embodiment 1)
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. In FIG. 1, 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. In FIG. 1A, 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. For transmission of this electric signal, a coaxial wire body to be described below is used. In FIG. 1 (b), 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. 1C, 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. There is a wiring circuit (not shown) in the space 25 in the key operation unit housing 20, and there is a wiring circuit (not shown) in the space 35 in the display housing 30. In the mobile phone 50, it is necessary to prevent water from entering both the space 25 and the space 35 even if the hinge is penetrated into water. The coaxial wiring body 10 according to the present exemplary embodiment 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. In the present embodiment, 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.
In the hinge structure, 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. When 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). As described above, 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. That is, 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. . For this reason, the accommodating part B can be reduced in size and the structure of the wiring body insertion port can be simplified. As 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. In the coaxial wiring body 10, as described above, 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.

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, and 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. 5A and 5B, 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. In the present embodiment, 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.
In the present embodiment, 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. By using the O-ring 13, reliable waterproofness can be obtained while reducing the dimensional accuracy of the portion directly constituting the seal device S.
In FIG. 5B, seven coaxial lines are shown as the plurality of coaxial lines 11, but usually several tens, for example, about 40 coaxial lines are used. In this case, 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 | covers the ground wire 1g. 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. In addition, 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 | sticker part 3 is the same resin as the jacket 1s, it will be the same material connection, and it is useful in obtaining continuity in material and raising joint strength. However, the resin of the seal portion 3 is not necessarily the same resin as that of the jacket 1s.
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.

(Modification of Embodiment 1)
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. In the coaxial wiring body 10 of this modified example (which is an example of the present invention), 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. 9, 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.
In summary, the coaxial wiring body 10 of the modified example shown in FIGS. 7 to 9 easily forms the gap filling portion 3j having difficulty in terms of complete filling with high reliability. It has a feature in that it can.

Next, the manufacturing method of the coaxial wiring body 10 shown in FIGS. 7-9 is demonstrated. First, 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. In the injection molding of the seal portion 3, 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. Thereafter, molten resin is injected from the nozzle at a predetermined pressure into the mold through a gate which is a resin introduction port. After cooling, when taken out from the mold, the coaxial wiring body 10 shown in FIGS. 7 to 9 can be obtained. For the coaxial line wiring body 10 having the bundle arrangement shown in FIG. 3, the arrangement of the plurality of coaxial lines is changed to the bundle arrangement (fixed with an adhesive tape or the like), and the resin is arranged in the mold in the same procedure as described above. Can be manufactured by injection molding.
The manufacturing method described above is not a method for bending the coaxial wire 11 in particular, but a manufacturing method for the straight type coaxial wiring body 10. Next, a manufacturing method of the coaxial wiring body 10 having the same flat arrangement as that of the coaxial wiring body 10 shown in FIGS. 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. When such a plurality of coaxial wires 11 are twisted, 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. In the injection molding of the seal portion 3, 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. Deploy. Thereafter, molten resin is injected from the nozzle at a predetermined pressure into the mold through a gate which is a resin introduction port. FIG. 10B shows the coaxial wiring body 10 taken out from the mold after cooling. As described above, the direction of bending can be determined by the orientation, posture, and the like when placed in the mold.
According to 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 part is a part that is fixed by being inserted into the insertion port of the housing in the electronic device, and the cross-sectional area does not increase. In addition, 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, there is no need to use a tube that sheathes the coaxial line, and the hinge structure can be simplified and miniaturized. In addition, the number of parts can be reduced.

(Embodiment 2)
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 line 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. With such a material structure, the following advantages can be obtained.
(1) 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. For this reason, at the time of injection molding of ETFE, deterioration such as deformation of the insulating layer 1d can be prevented.
(2) 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 of Embodiment 2)
Although not shown, there are the following as modifications of the coaxial wiring body 10 shown in FIG. 11 (which is an example of the present invention).
-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. In addition, since PFA of the same resin as the insulating layer 1d is injected in a molten state with the jacket 1s interposed, the insulating layer 1d is temporarily exposed to a transiently high temperature state with the jacket 1s interposed. Only. For this reason, it is possible to avoid deformation of the insulating layer by precisely controlling the temperature of the molten resin forming the seal portion 3.

-Modification 2 (Example of the present invention): (Insulating layer 1d is PFA / jacket 1s is PFA / seal part 3 is PFA)-
According to said structure, injection molding of the same resin as jacket 1s is performed. For this reason, integration becomes the same material connection by injection molding. For this reason, connection integration can be performed smoothly and connection strength can be increased. In addition, since PFA of the same resin as the insulating layer 1d is injected in a molten state with the jacket 1s interposed, the insulating layer 1d is temporarily exposed to a transiently high temperature state with the jacket 1s interposed. Only. For this reason, it is possible to avoid deformation of the insulating layer by precisely controlling the temperature of the molten resin forming the seal portion 3.

(Embodiment 3)
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. In the present embodiment, 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.
According to said sealing apparatus S, since an O-ring is abbreviate | omitted, a number of parts can be reduced. For this reason, it is possible to obtain the coaxial wiring body 10 excellent in economy while obtaining the advantages of simplification and miniaturization of the structure of the hinge and its peripheral portion in the first embodiment.

(Embodiment 4)
FIG. 14 is a partially enlarged view of the coaxial wiring body 10 according to Embodiment 4 of the present invention. In the coaxial wiring body 10, 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. On the outer periphery of the plurality of coaxial wiring bodies 11 other than the seal portion 3, 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. Although 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.) is used for the insulating layer 1d that is interposed between the signal line 1a of the coaxial line 1 and the ground line 1g and insulates them, and ETFE (melting point: 260 ° C.) is used for the jacket 1s. Is used. In the injection molding of the seal portion 3, 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. For this reason, for example, 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.

  In FIG. 15, only a part of the coaxial line 1 is shown, but when there are many, the number is as many as 40. Therefore, the central part of the plurality of coaxial line assemblies 11 is surrounded by a plurality of coaxial lines. For this reason, when the resin of the seal portion 3 is surely spread over all the gaps of the plurality of coaxial lines, the central part of the coaxial line assembly 11 passes through the narrow gaps of many surrounding coaxial lines and reaches the center. There must be great resistance to flow in the meantime. Resins with an MFR of 50 g / 10 min or more at a temperature of 190 ° C. and a nominal load of 2.16 kg, such as EMAA, have high fluidity and pass through a plurality of coaxial wires 1 during injection molding to ensure a gap in the center. Can be filled. When the MFR is about 20 g / 10 min, it is not possible to fill all the gaps of the plurality of coaxial lines, and voids (holes) are generated. By using a resin having an MFR of 50 g / 10 min or more, the resin can be distributed to the central portion of the coaxial line assembly 11 composed of a large number of coaxial lines, and the gap can be filled. As a result, a high level of waterproofness with excellent durability can be obtained.

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. First, 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. In the injection molding of the seal portion 3, 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. At that time, 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. is injected from the nozzle at a predetermined pressure into the molding die through a gate which is a resin introduction port. Then, after cooling to predetermined temperature below melting | fusing point of resin, for example, about 40 degreeC, it takes out from a shaping die.
The manufacturing method of the coaxial wiring body 10 shown in FIGS. 3 to 5 is only different from the case of the coaxial wiring body 10 of the present embodiment in the heating temperature of the molding die and the temperature of the molten resin. .

(Embodiment 5)
FIG. 16 is a diagram showing the coaxial line 11 of the seal portion in the coaxial wiring body of the fifth embodiment given as a reference example . 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. In the bundled coaxial line assembly 11, 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, and 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. When there is no concave portion 1m, 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.

  On the other hand, the broken-line sectional views in FIGS. 17A and 17B are transverse sectional views passing through the concave portion 1m. As can be seen in the cross-sectional view of the broken line, since there is 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. In the lateral opening space 11k, the space thickness between adjacent coaxial lines becomes thicker as the depth of the concave portion 1m is larger. That is, 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.

(Embodiment 6)
FIG. 18 is a diagram showing the coaxial line 11 of the seal portion in the coaxial wiring body according to the sixth embodiment given as a reference example . 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. In the bundled coaxial line assembly 11, 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. In the present embodiment, 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. By the above method, a coaxial line with a convex portion can be easily obtained, and using this coaxial line, a coaxial line wiring body in which a gap filling portion is reliably formed up to the binding center portion is obtained. Can do.

(Embodiment 7)
FIG. 19 (a) is a diagram showing a flat knitted wire 11h used for the coaxial wiring body in the embodiment given as a reference example . In the flat knitting line 11h, 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. As a result, the coaxial line 1 and the knitting yarn 15 form warps and wefts to form fibers. The coaxial line 1 may be anything. For example, 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. 0.18 mm in diameter), tin-plated copper alloy wire (horizontal winding with strand diameter 0.03 mm, 21 ± 2, pitch 4.5 ± 1.5 mm) for ground wire, and Sumiflon (registered) for jacket Trademark) A (thickness 0.04 mm, outer diameter 0.31 mm) can be used respectively. The knitting yarn 15 may be anything as long as it is an insulating wire. For example, 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. 19B 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. In forming 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. As a result, 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.

(Embodiment 8)
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. 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.

Since 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. When 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. As a result, 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. As a result, when the resin is injected, 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.
How much larger D1 is from Do can be adjusted by the longitudinal dimension of the gap h. The moving distance, that is, the length of the gap h is preferably about 0.5 mm to 1 mm, for example. In FIG. 21, the amount of bulging is slightly exaggerated, and D1 is drawn a little excessively compared to Do. In the curved and bulged portion, 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.

In order to verify the effect of the MFR of the resin forming the seal portion 3 in Embodiment 4 of the present invention, 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 wire 0.22 mmφ × 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 mmφ × 40 (total diameter 1.9 mm), resin EMAA of seal part (Mitsui-DuPont Chemical Co., Ltd. Nuclel (registered trademark))
Two types of EMAA were used. EMAA (1): Nucrel N1110H, and EMAA (2): Nucrel N1050H
EMAA (1) or Nucrel N1110H as described above, and EMAA (2)
Alternatively, 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. Then, it cooled to 40 degreeC and the molding die was removed. The cross section of the seal part 3 of each specimen was sampled at three locations for each specimen and observed with an optical microscope. The results are shown in Table 1. 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.

According to Table 1, the magnitude of the gap generation in the coaxial line gap can be arranged by MFR. In ETFE with an MFR of 20 g / 10 min, many voids were generated in the coaxial line gap. As for the frequency, voids were observed in any of the three cross-sections for all five specimens. Therefore, the evaluation is “x”. Further, in 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 “◎”.
Based on the above results, by using the resin with the above MFR of 50 g / 10 min or more for the seal part, it is possible to fill all the gaps of the coaxial wires with the resin, and it has a high level of waterproof property with excellent durability. Can be obtained.

  Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  According to the coaxial wiring body and the like of the present invention, it is possible to secure waterproofness at the insertion port of the housing, and to reduce the number of parts while miniaturizing and simplifying the hinge and the surrounding structure. 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.

  1 coaxial line, 1a signal line, 1d insulating layer, 1g ground line, 1m concave part, 1n convex part, 1s jacket, 3 seal part, 3a seal part surface, 3b O-ring groove bottom, 3j gap filling part, 3s peripheral edge Part, 10 coaxial line wiring body, 11 coaxial line assembly, 11h flat knitted wire, 11k lateral opening space, 11s poreflon tape, 13 O ring, 15 knitting yarn, 19 connector, 20 key operation side case, 21 Key operation unit, 25 Space in key operation side case, 30 Display side case, 31 Display unit, 40 Hinge, 41 Hinge center cover, 50 Mobile phone, 61 Mold, 63 Mold part of seal part, 65 Molding Movable part of mold, AX axis rotating shaft mechanism storage part, B wiring body storage part, h gap (movable stroke) of movable part of molding die, S seal device.

Claims (10)

A plurality of coaxial wires,
A seal portion formed so as to be integrated with the plurality of coaxial lines,
The sealing portion, possess a gap filling unit for filling the gaps of the plurality of coaxial lines, and a peripheral portion surrounding the plurality of coaxial lines,
In the peripheral portion of the seal portion, a groove for inserting an O-ring is provided on the outer periphery of the peripheral portion, or the outer peripheral surface of the peripheral portion is a seal surface,
The resin forming the seal part has 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, and
The resin forming the seal portion is a resin having a lower melting point than the resin of the coaxial line jacket,
Wherein the gap filling section and the peripheral portion the periphery is formed as one piece with the same resin is characterized that you have to form the outer shape of the seal portion, coaxial line wiring body.   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 bulge and separation portion, and the seal portion is formed on the bulge and separation portion. The coaxial wiring body according to claim 1, wherein the coaxial wiring body is formed so as to pass between coaxial lines. The coaxial line wiring body according to claim 1, wherein the coaxial line and the seal portion are not fused on a contact surface. The coaxial line wiring body according to any one of claims 1 to 3, wherein the resin forming the seal portion is an ethylene-methacrylic acid copolymer resin (EMAA resin). The resin forming the seal part is the same resin as the insulating layer that insulates the signal line and the ground line of the coaxial line, or a resin having a melting point lower than that of the resin of the insulating layer. Item 4. The coaxial wiring body according to any one of Items 1 to 3 . 6. The coaxial according to claim 5 , wherein the resin forming the seal portion is PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or ETFE (tetrafluoroethylene / ethylene copolymer). Wire wiring body. The said sealing part WHEREIN: These coaxial lines are flat arrangement | positioning planarly, or the bundle arrangement | sequence bundled in the cross-sectional circle shape or the ellipse shape, The any one of Claims 1-6 characterized by the above-mentioned. The coaxial wire wiring body according to the item. The coaxial line wiring body according to any one of claims 1 to 7 , wherein the seal portion is provided at one place or two places. An electronic device using the coaxial wiring body according to any one of claims 1 to 8 . A method of manufacturing a coaxial line wiring body including a plurality of coaxial lines and a seal portion formed so as to be integrated with the plurality of coaxial lines,
A step of preparing a molding die;
Heating the molding die to a temperature equal to or higher than the melting point of the resin of the seal part while setting the plurality of coaxial lines in the molding die;
A step of injecting a molten resin forming the seal portion into the molding die;
Cooling the mold to a predetermined temperature not higher than the melting point of the resin, while the resin of the seal portion is injection-molded ,
In the molding die, a movable part that can change the distance to the mold part to be ejected by grasping the plurality of coaxial lines on both sides or one side adjacent to the mold part to inject the resin for forming the seal part. A mold in which the movable part is separated from the injection mold part by gripping the plurality of coaxial lines when the plurality of coaxial lines are set in the molding die, and the movable part is injected before the resin is injected. A method of manufacturing a coaxial wiring body, wherein a plurality of coaxial lines are curved and bulged so as to be close to a portion and separated from each other to form a bulging and separating portion .

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