KR20140001727A - Coaxial cable harness having a small diameter and method for manufacturing the same - Google Patents

Abstract

The present invention provides a thinner narrow coaxial cable harness and a method of manufacturing the same while ensuring good waterproofness. The narrow coaxial cable harness 11 is divided into a plurality of groups, at least a part of which is other than the terminal portions of the plurality of narrow coaxial cables 12, and each group is inserted through the waterproof tube 21 to each of the narrow coaxial cables. Tied so that the positional relationship of the can be changed, it is penetrated into the through insertion hole 16 of the waterproof cap 14, respectively, and the waterproof cap 14 is hermetically packaged at the ends of the plurality of waterproof tubes 21. Is connected. The metal tube 17 is press-fitted inside the waterproof tube 21, the waterproof cap 14 is made of an elastic material, and the waterproof tube 21 is interposed in the thickness direction by the waterproof cap 14 and the metal tube 17. It is compressed.

Description

Fine coaxial cable harness and method for manufacturing the same {COAXIAL CABLE HARNESS HAVING A SMALL DIAMETER AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a narrow coaxial cable harness formed by bundling a plurality of narrow coaxial cables and a method of manufacturing the same.

Precision small devices, such as a portable terminal and a small video camera, connect the circuit board in the housing which is slidably or rotatably connected with each other by the wiring material. As an example of the wiring structure of a precision small device, two housings, a hinge structure connecting the two housings, a waterproof tube disposed inside the hinge structure, and a waterproof tube, An electrical signal cable extending from the end and cut from the inside of one housing to the inside of the other housing, a seal recommended for the electrical signal cable and attached to the end of the waterproof tube, and a recommended elastic material for the seal. It is known (for example, refer patent document 1).

As another example of the wiring structure, the waterproof portion mounted at the introduction point into the housing is composed of a seal cap and a zero ring mounted on the outer circumference of the seal cap, the waterproof portion is covered with a waterproof tube, and the seal cap is sealed by the adhesive material. It is known that the waterproof tube and the waterproof portion are adhered tightly to each other (see Patent Document 2, for example).

Japanese Patent Laid-Open No. 2000-263285 Japanese Patent Publication No. 2009-206043

Cables that are wired between the housings are waterproof through flexible and flexible waterproof tubes. However, in recent years, with the new miniaturization and thinning of the device, wiring spaces are further reduced. Cable harnesses are required. In the coaxial cable harness in which the intermediate portion is rounded in one, it is sometimes difficult to wire the bundled intermediate portion in a thin and narrow accommodating space.

Moreover, in the coaxial cable harness in which the middle part is rounded one by one, the cross-sectional shape of the waterproof part of a harness becomes large, for example, if the cross section of a waterproof part is circular, the diameter will become large. Therefore, it was also difficult to make the thickness of the waterproof part attached to a housing thin.

SUMMARY OF THE INVENTION An object of the present invention is to provide a thin narrow coaxial cable harness and a method of manufacturing the same while ensuring good water resistance.

The narrow coaxial cable harness of the present invention, which can solve the above problems, includes a plurality of narrow coaxial cables, a plurality of waterproof tubes, and a waterproof cap having a plurality of through insertion holes,

The plurality of narrow coaxial cables are bundled such that at least a portion of the narrow coaxial cable is divided into a plurality of groups, each of which is inserted through the waterproof tube, so that the positional relationship between the narrow coaxial cables can be changed, Are respectively inserted through the through insertion holes,

The waterproof cap is connected to the ends of the plurality of waterproof tubes in a watertight manner collectively.

In the narrow coaxial cable harness of the present invention, it is preferable that the waterproof cap is made of an elastic material, and the waterproof tube is sandwiched and compressed in the thickness direction by the waterproof cap and the metal tube.

In the narrow coaxial cable harness of the present invention, it is preferable that the waterproof cap is made of an elastic material, and a protrusion is formed on the outer circumference of the waterproof cap to protrude in a direction orthogonal to the axial direction of the through insertion hole.

In the narrow coaxial cable harness of the present invention, the waterproof tube has an outer diameter of 1.3 mm or less, wherein the waterproof tube is pressurized into the through insertion hole of the waterproof cap to impart a pressure of 300 kPa to the waterproof cap. It is preferable that the flatness ratio of a waterproof tube is 30% or less.

Moreover, it is preferable that the hardness of the said waterproof cap is a value between 50 degrees-70 degrees in Shore A hardness, and it is preferable that the said waterproof tube is 0.1 mm or more and 0.2 mm or less in thickness.

In the narrow coaxial cable harness of the present invention, at least one of the waterproof tubes is preferably different in length from the other waterproof tubes.

In the narrow coaxial cable harness of the present invention, it is also preferable that the intermediate portion of each of the waterproof tubes has an integral portion integrated with each other.

Moreover, the manufacturing method of the narrow coaxial cable harness of this invention is a manufacturing method of the narrow cable harness provided with the some narrow coaxial cable, the some waterproof tube, and the waterproof cap which has a some through insertion hole.

Dividing at least a portion other than the terminal portion of the plurality of narrow coaxial cables into a plurality of groups,

Each of the groups are inserted through the waterproof tube, respectively, and the bundles are bundled so that the positional relationship between each of the narrow coaxial cables can be changed.

It is characterized by connecting the waterproof cap to the ends of the plurality of waterproof tubes in a watertight manner.

In the manufacturing method of the narrow coaxial cable harness of the present invention, the waterproof cap is made of an elastic material,

It is preferable to press-in a metal tube inside the waterproof tube, and compress the waterproof tube by sandwiching the waterproof tube in the thickness direction by the waterproof cap and the metal tube.

In the manufacturing method of the narrow coaxial cable harness of the present invention, the waterproof tube has an outer diameter of 1.3 mm or less, and the waterproof tube is pressed into the through insertion hole of the waterproof cap to impart a pressure of 300 kPa to the waterproof cap. It is also preferable that the flatness of the waterproof tube at the time is 30% or less.

In addition, a flat rate is computed by "flat rate (%) = (diameter after pressurization / diameter before pressurization) x10".

In the manufacturing method of the narrow coaxial cable harness of this invention, it is preferable that the hardness of the said waterproof cap is a value between 50 degrees-70 degrees by Shore A hardness, and it is also preferable that the said waterproof tube is 0.1 mm or more and 0.2 mm or less in thickness.

In the manufacturing method of the narrow coaxial cable harness of the present invention, it is also preferred that the length of the at least one waterproof tube is different from the length of the other waterproof tube.

In the manufacturing method of the narrow coaxial cable harness of this invention, it is also preferable to integrate the intermediate part of each said waterproof tube.

According to the present invention, since a plurality of narrow coaxial cables are divided into a plurality of groups at locations other than the terminal portion, and each group is inserted through the waterproof tube, a plurality of narrow coaxial cables are bundled together and passed through the waterproof tube. It becomes possible to wire thinner. In addition, the waterproof tube through which the narrow coaxial cable is inserted is inserted through the through-hole of the waterproof cap, and the waterproof cap is connected to the end of the waterproof tube in a watertight manner so that the cross-sectional shape of the waterproof cap can be made thinner. have. Thereby, wiring can be made thin, ensuring favorable waterproofness, and a waterproof cap can be attached and wired even in the installation location where a housing is thin.

In addition, since the zero ring is unnecessary when the waterproof cap is made of an elastic material, a good waterproof structure can be obtained without causing a price increase. The O-ring must be prepared by selecting a diameter corresponding to the outer diameter of the mounting side, and the use of the O-ring is limited except for a circular member. However, the O-ring is unnecessary in the present invention. Corresponding to the housing side, the waterproof cap can be made thin, and a good waterproof structure can be obtained while enabling wiring to thin and narrow locations.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a mobile telephone connected with a narrow coaxial cable harness of the present invention, where (a) is a state in which the housings of the cellular phone are open, and (b) is a view of a state in which the housings of the cellular phone terminal are closed. ,
2 is a plan view showing an example of an embodiment of a narrow coaxial cable harness according to the present invention;
3 is a plan view showing another example of the embodiment of the narrow coaxial cable harness according to the present invention;
4 is a perspective view when mounting a metal tube and a waterproof cap to the waterproof tube,
5 is a cross-sectional view when mounting the metal tube and the waterproof cap to the waterproof tube,
6 is a cross-sectional view showing a state in which the narrow coaxial cable harness of FIG. 2 or 3 is mounted in a housing;
7 is a plan view showing another example of an embodiment of a narrow coaxial cable harness according to the present invention;
8 is a perspective view of a waterproof cap to which a waterproof tube is connected;
9 is a cross-sectional view of the waterproof cap to which the waterproof tube is connected;
10 is a cross-sectional view showing a state in which the narrow coaxial cable harness of FIG. 7 is mounted in a housing;
11 is a front view of a mobile telephone connected by the narrow coaxial cable harness of the present invention, (a) is a state in which the housings of the mobile phones are closed, and (b) is a state in which the housings of the mobile phones are open, ( c) is a view of a state in which the rotating housing of the mobile phone is rotated,
12 is a plan view showing yet another example of an embodiment of a narrow coaxial cable harness according to the present invention;
13 is a plan view showing still another example of embodiment of a narrow coaxial cable harness according to the present invention;
Fig. 14 is a diagram showing an example in which a narrow coaxial cable harness is wired into a mobile telephone having a rotating housing, wherein (a) is a schematic rear view of the rotating housing before rotation, and (b) is a view of the rotating housing during rotation. It is a schematic back view, (c) is a schematic back view of after a rotation of a rotation housing,
15 is a schematic cross-sectional view showing the airtight evaluation method;
16 is a front view of the waterproof cap pressed by the pressurizing device.

EMBODIMENT OF THE INVENTION Hereinafter, the example of embodiment of the narrow coaxial cable harness which concerns on this invention, and its manufacturing method is demonstrated, referring drawings.

The narrow coaxial cable harness of this embodiment is connected to the board | substrate in the housings 2 and 3 which slide relatively of apparatuses, such as the mobile telephone 1 as shown in FIG. 1, for example. In this mobile phone 1, a display is provided in one housing 2, and a key operation part is provided in the other housing 3. As shown in FIG.

As illustrated in FIG. 2, the narrow coaxial cable harness 11 has a plurality of (40 to 50) narrow coaxial cables 12, and a plurality of two narrow coaxial cables 12 are divided into a plurality of groups (two in this embodiment). Bundle portion 10 is provided. At the terminal portions at both ends of the narrow coaxial cable harness 11, the narrow coaxial cable 12 is arranged in a planar shape and connected to the housing 2 and the wiring board in the housing 3 of the mobile telephone 1. The connector 13 is mounted and star-processed.

The narrow coaxial cable 12 is a structure which has a center conductor, an internal insulator, an outer conductor, and an outer sheath from the center to the outer side in the radial direction orthogonal to a central axis, and terminal process is implemented in each end part. The outer conductor, the inner insulator, and the center conductor are exposed to the predetermined length step by step, and are connected to the connector 13. The narrow coaxial cable harness 11 may include, in addition to the plurality of narrow coaxial cables 12, a narrow insulated cable having no external conductor. In addition, in the figure, the number of narrow coaxial cables 12 is shown small and simplified.

The narrow coaxial cable 12 according to the present invention is a coaxial cable thinner than AWG40 according to the standard of AWG (American Wire Gauge), and the outer diameter thereof is about 0.2 mm. It is desirable to use a finer coaxial cable that is thinner than AWG44. Thereby, the narrow coaxial cable harness 11 is easy to bend, and the resistance at the time of sliding the housing 2 and the housing 3 can be made small. In addition, when the plurality of narrow coaxial cables 12 are bundled to form the plurality of bundle portions 10, the thickness of the bundle portions 10 can be reduced, enabling high-density wiring in a limited wiring space.

In each bundle portion 10 of the narrow coaxial cable harness 11, a plurality of narrow coaxial cables 12 are respectively inserted through the waterproof tube 21, and the narrow coaxial cables 12 are each sealed by the waterproof tube 21. ) Are bound so that the positional relationship between them can be changed. The waterproof tube 21 has excellent waterproofness, flexibility and flexibility, and is formed of, for example, a soft resin such as fluororesin, polyolefin or silicone rubber or a porous body thereof. For example, the waterproof tube 21 has a high durability by forming from a terpolymer polymer (THV) of ethylene tetrafluoride, propylene hexafluoride and vinylidene fluoride. As for the terpolymer polymer which comprises this waterproof tube 21, melting | fusing point is 100 degreeC or more and 140 degrees C or less, MFR (melt flow rate, 265 degreeC / 5 kg) is 1.5 g / min or more and 2.5 g / min or less, and a glass potential point is 0, It is preferable that they are 600 degreeC or more and 10 degrees C or less, 600% or more and 700% or less of extension, and a flexural modulus of 0.05 kPa or more and 0.10 kPa or less.

Each bundle 10 of FIG. 2 includes about twenty diameter coaxial cables 12, respectively. When the narrow coaxial cable 12 is a thin AWG46 and the plurality of narrow coaxial cables 12 are divided into two bundles 10, and the narrow coaxial cable 12 of one bundle 10 is 20. When the narrow coaxial cable 12 is inserted into the waterproof tube 21 through a bundle, the outer diameter of the waterproof tube 21 can be about 1.9 mm.

At both ends of each bundle portion 10, a common waterproof cap 14 is hermetically and collectively connected to an end of each waterproof tube 21. In the waterproof cap 14, a plurality of through insertion holes 16 (see Fig. 4) corresponding to the plurality of waterproof tubes 21 are formed, and the waterproof cap 14 is formed inside these through insertion holes 16. ) Is installed. In addition, the narrow coaxial cable 12 of each bundle part 10 inserted through the waterproof tube 21 is also penetrated into the through insertion hole 16 of the waterproof cap 14.

As for the narrow coaxial cable harness 11 of FIG. 2, the waterproof cap 14 is connected to the both ends of the two bundle parts 10 one by one. On the end side of the waterproof cap 14, a plurality of narrow coaxial cables 12 extending from the waterproof tubes 21 of the two bundle portions 10 are exposed and gathered together and paralleled in a plane shape, and one connector ( 13) is connected.

As another example, the narrow coaxial cable harness 11a of FIG. 3 includes a plurality of narrow coaxial cables 12 extending from the waterproof tube 21 of the two bundle portions 10 in a group of each bundle portion 10. While being divided, each of them is paralleled in a planar shape and connected to a different connector 13a for each group. In addition, you may change the length of the narrow coaxial cable 12 for every group of bundle parts 10.

Whether it is set as the form of FIG. 2 or FIG. 3 can be suitably selected according to the request | requirement of the wiring in the housings 2,3. In addition, one end of the narrow coaxial cable harness may be in the form of FIG. 2, and the other end may be in the form of FIG. 3.

Next, the installation structure of the waterproof cap 14 to the waterproof tube 21, and its mounting method are demonstrated.

As shown in FIG. 4, each group of narrow coaxial cables 12 penetrates through each group of narrow coaxial cables 12 in the state which inserted each group of narrow coaxial cables 12 by the desired number into each waterproof tube 21 from the end side. Insert it through the inside of 17). As shown in FIG. 5, the metal tube 17 is inserted into the end of the waterproof tube 21 to be mounted. The outer diameter of the metal tube 17 may be more than the inner diameter of the waterproof tube 21. For example, when the waterproof tube 21 has an inner diameter of 1.5 mm and an outer diameter of 1.9 mm, the metal tube 17 may have an inner diameter of 1.5 mm and an outer diameter of 1.7 mm. By inserting these metal tubes 17 into the waterproof tube 21, the waterproof tube 21 is pushed outward in the radial direction, elastically deformed, and comes into close contact with the outer peripheral surface of the metallic tube 17. When the thickness of the waterproof tube 21 is about this, it is preferable to use the metal tube 17.

Further, at one end of the metal tube 17, a collar portion 18 protruding outward in the radial direction is formed. When the metal tube 17 is inserted into the waterproof tube 21, this collar portion 18 is fixed to the end face of the waterproof tube 21, whereby the longitudinal direction of the metal tube 17 with respect to the waterproof tube 21. Is determined.

The waterproof cap 14 is made of an elastic resin material such as silicone rubber and is mounted on the outer circumference of the end of the waterproof tube 21. The through insertion hole 16 of the waterproof cap 14 has an inner diameter of 2.0 mm, for example, and is mounted on the outer circumference of the waterproof tube 21 into which the metal tube 17 is inserted, thereby pressing the waterproof tube 21 toward the inner diameter side. . That is, the end part of the waterproof tube 21 is pressed in and out of the thickness direction by the metal tube 17 and the waterproof cap 14, and is compressed. As a result, the waterproof cap 14 is hermetically connected to the waterproof tube 21.

Moreover, the cross-sectional shape of the waterproof cap 14 is oval shape, and the outer periphery of the waterproof cap 14 is orthogonal to the axial direction of the penetration insertion hole 16 in the center part as seen from the axial direction of the penetration insertion hole 16. The protrusion 15 protruding in the direction to be formed is continuously formed in the circumferential direction. The location where the waterproof cap 14 is attached to the housing is a groove portion surrounded by a wall surrounding the waterproof cap 14. The cross section of the groove is slightly smaller than the cross section of the waterproof cap 14, and the waterproof cap 14 is press-fitted into the groove to tightly mount the narrow coaxial cable harness 11 to the housing. The protrusion 15 of the waterproof cap 14 is pressed against the grooves 2a and 3a (see FIG. 6) of the housing on which the waterproof cap 14 is mounted, thereby crushing the watertight cap 14 and the housing more reliably. It can be done. Since the protrusion 15 is integrally molded with the waterproof cap 14, a price can be held down compared with the case where a separate O-ring is used.

Since the waterproof tube 21 consists of soft resins, such as a silicone rubber, even if it tries to manufacture an inner diameter and an outer diameter to a predetermined | prescribed dimension, a dimensional error tends to occur. However, since thickness is easy to obtain an accurate dimension, the gap of the thickness of the waterproof tube 21 is relatively small. By setting the difference between the outer diameter of the metal tube 17 and the inner diameter of the through insertion hole 16 of the waterproof cap 14 to be smaller than the thickness of the waterproof tube 21, the variation in the thickness of the waterproof tube 21 is small. The waterproof tube 21 can be reliably compressed in the thickness direction, and watertightness is easily obtained.

A preferred mounting procedure of the waterproof cap 14 to the waterproof tube 21 is to first pass through the waterproof cap 14 through the waterproof tube 21 into which the group of narrow coaxial cables 12 is inserted. Passing through the insertion hole 16, the waterproof cap 14 is disposed inside the longitudinal direction than the end of the waterproof tube 21. Then, the group of narrow coaxial cables 12 is inserted through the inside of the metal tube 17 from the end, and the metal tube 17 is pressed into the inside of the end of the waterproof tube 21. In this state, the waterproof cap 14 is moved to the end of the waterproof tube 21. At this time, since the outer diameter of the end portion of the waterproof tube 21 is larger than the inner diameter of the through insertion hole 16 of the waterproof cap 14, the waterproof tube 21 is widened while the through insertion hole 16 of the waterproof cap 14 is widened. Slide to the end.

By this procedure, it is easy to compress the end part of the waterproof tube 21 in the thickness direction to mount the waterproof cap 14 in a watertight manner. The waterproof cap 14 can be attached to the plurality of waterproof tubes 21 collectively. In addition, the connection of the connector 13 to the narrow coaxial cable 12 may be performed after passing the narrow coaxial cable 12 through each of the waterproof tube 21, the waterproof cap 14, and the metal tube 17.

To mount the narrow coaxial cable harness 11 to the housing 2 and the housing 3 constituting the mobile phone 1 or the camera, first, before attaching the connector 13 to the narrow coaxial cable 12, The narrow coaxial cable 12 is mounted through the waterproof tube 21, the waterproof cap 14, and the metal tube 17. Next, as shown in FIG. 6, the narrow coaxial cable 12 exposed to the end side from the waterproof tube 21 is inserted into the through insertion hole 2b of the housing 2 and the through insertion hole 3b of the housing 3. Pass through each of the grooves 2a and the grooves 3a of the housing 3 to fit the waterproof cap 14 at the end of the bundle 10, respectively. The grooves 2a and 3a are elliptical in plan view. The protrusion 15 provided on the outer circumference of the waterproof cap 14 is pressed against and crushed by the grooves 2a and 2b to achieve watertightness between the waterproof cap 14 and the housings 2 and 3. Since the waterproof cap 14 and the waterproof tube 21 are watertightly connected, water is infiltrated into the housing 2 or the interior (connector 13 side) of the housing 3 through the narrow coaxial cable harness 11. There is nothing to be done.

FIG. 6 is a view of a portion of the housing 2 and the housing 3 in cross section in the thickness direction, and only one of the plurality of bundle portions 10 is shown, but there is another bundle portion 10 in the depth direction of this figure. Doing. That is, each group of narrow coaxial cables 12 constituting the narrow coaxial cable harness 11 is arranged side by side in the plane direction in which the housing 2 and the housing 3 slide. Thereby, it becomes possible to make thin wiring between the housing | casing 2 and the housing | casing 3 rather than the case where all the narrow coaxial cables which comprise a narrow coaxial cable harness are bundled together and passed through a waterproof tube. In addition, since the waterproof cap 14 is hermetically and collectively connected to the end of the waterproof tube 21, the cross-sectional shape of the waterproof cap 14 can also be thinned. Thereby, the height H of the groove part 2a, 2b of the housing | casing 2 and the housing | casing 3 can be made low.

Thus, according to the narrow coaxial cable harness 11 of this embodiment, it can wire thinly, ensuring favorable waterproofness, and can attach and wire the waterproof cap 14 also in the mounting place where the housings 2 and 3 are thin. have. And the housings 2 and 3 can also be made thin.

In addition, if it is going to obtain waterproofing with an O-ring, since an O-ring is an expensive member, a price will increase. In this embodiment, since the O-ring does not need to be used, a good waterproof structure can be obtained without causing a price increase. In the case of using the O-ring, it is necessary to form the mounting groove of the O-ring in the waterproof cap 14, but this is also unnecessary in this embodiment. In addition, the O-ring must be prepared by selecting one having a diameter corresponding to the outer diameter of the mounting side, and the use of the O-ring is limited except for a circular member. There is no limitation of the shape. Therefore, the waterproof cap 14 can be made thin in correspondence with the housings 2 and 3 side to be connected, and a good waterproof structure can be obtained while enabling wiring to a thin and narrow location.

Next, another embodiment according to the present invention will be described.

In addition, the same code | symbol is attached | subjected to the site | part common to embodiment mentioned above, and the overlapping description is abbreviate | omitted.

As shown in FIG. 7, the narrow coaxial cable harness 11b has a plurality of narrow coaxial cables 12 (40 in the present embodiment), and the plurality of narrow coaxial cable harnesses 11 are divided into a plurality of groups (the present embodiment). In the present invention, a plurality of bundle portions 10 (four in the present embodiment), which are bundled together, are provided. In the terminal portions at both ends of the narrow coaxial cable harness 11b, the narrow coaxial cables 12 of the respective bundle portions 10 are arranged in a planar shape, and the housings 2 and 3 of the mobile telephone 1 shown in FIG. The connector 13 for connection to the wiring board in the inside) is mounted and subjected to star formation.

In each bundle part 10 of the narrow coaxial cable harness 11b, a plurality of narrow coaxial cables 12 of each group are respectively inserted through the waterproof tube 21, and the narrow coaxial cables 12 of each group are interposed therebetween. The positional relationship of is bound so that it can be changed. Therefore, when this narrow coaxial cable harness 11b is bent, since the narrow coaxial cable 12 moves smoothly in the waterproof tube 21, provision of tensile force, side pressure, etc. to each narrow coaxial cable 12 is extremely difficult. Suppressed.

In addition, when the narrow coaxial cable harness 11b is bent between the housings 2 and 3, the outermost waterproof tube 21 in the radial direction of the bending becomes long. In FIG. 7, the length of the waterproof tube 21 is gradually lengthened toward the outer side. That is, the narrow coaxial cable harness 11b of FIG. 7 is equipped with the waterproof tube 21 mutually differing in length.

When four waterproof tubes 21 are used as shown in FIG. 7, the waterproof tube 21 has an outer diameter of 1.3 mm or less and a thickness of 0.1 mm or more and 0.2 mm or less. In the waterproof tube 21 of this embodiment, an outer diameter is 1.3 mm, an inner diameter is 1.1 mm, and thickness is 0.1 mm.

As shown in FIG. 8 and FIG. 9, a pair of waterproof caps 14b common to the ends of the respective waterproof tubes 21 are hermetically and collectively connected at both ends of each bundle portion 10. A plurality of through insertion holes 16 corresponding to the plurality of waterproof tubes 21 are formed in the waterproof cap 14b, and the waterproof tube 21 is attached to these through insertion holes 16. Moreover, the narrow coaxial cable 12 of each bundle part 10 inserted through the waterproof tube 21 is also penetrated into the through insertion hole 16 of the waterproof cap 14b.

The waterproof cap 14b is made of an elastic resin material such as silicone rubber, and its hardness (Shore A hardness) is 50 degrees or more and 70 degrees or less. In this embodiment, the hardness of the waterproof cap 14b is 60 degrees. When the outer diameter of the waterproof tube 21 is 1.3 mm, the inner diameter of the through insertion hole 16 of the waterproof cap 14b is 0.95 to 1.05 mm (the outer diameter of the waterproof tube relative to the inner diameter of the through hole is 1.2 times). At 1.4 times). For example, the waterproof tube 21 is hermetically connected to the waterproof cap 14b by press-fitting the waterproof tube 21 with an outer diameter of 1.3 mm larger than the inner diameter of 1.0 mm of the through hole 16.

At this time, the waterproof tube 21 is press-fitted into the penetration insertion hole 16 of the waterproof cap 14b, and when the pressure of 300 kPa is applied to the waterproof cap 14b, the waterproof tube 21 having a flatness of 30% or less is obtained. In the case of using a thin waterproof tube 21 having an outer diameter of 1.3 mm or less, the inside of the waterproof tube 21 is pressed into the fitting portion enclosed by the wall of the housing. Even if a support member such as a metal tube is not inserted, the waterproof tube 21 is crushed so that a gap does not occur between the through insertion hole 16 and the waterproof cap 14b. Therefore, the outer circumferential surface of the waterproof tube 21 is in close contact with the inner circumferential surface of the through insertion hole 16 of the waterproof cap 14b, thereby ensuring a good watertight state. Moreover, you may apply an adhesive material (ultraviolet-curing type, moisture hardening type, etc.) between the penetration insertion hole 16 of the waterproof cap 14b, and the waterproof tube 21, and may adhere the waterproof cap 14b and the waterproof tube 21 to it. . In this way, the waterproof cap 14b and the waterproof tube 21 can be connected more reliably and water tightly.

The narrow coaxial cable harness 11b is connected to the waterproof cap 14b one by one at both ends of the four bundle parts 10. On the end side of the waterproof cap 14b, a plurality of narrow coaxial cables 12 extending from the waterproof tubes 21 of the four bundle portions 10 are exposed, gathered together and paralleled in a planar shape, with one connector ( 13) is connected.

In addition, the cross-sectional shape of the waterproof cap 14b is an elliptical shape, and the outer periphery of the waterproof cap 1144b has the axial direction of the penetration insertion hole 16 at the both ends of the penetration insertion hole 16 in the axial direction. A pair of protrusions 15 protruding in the orthogonal direction are formed continuously in the circumferential direction.

In order to mount the narrow coaxial cable harness 11b to the housings 2 and 3 constituting the mobile phone 1 or the camera, a plurality of narrow coaxial cables are first mounted before the connector 13 is attached to the narrow coaxial cable 12. The cable 12 is assembled by passing through the through hole 16 of the waterproof tube 21 and the waterproof cap 14b. Then, the connector 13 is attached to the narrow coaxial cable 12.

Next, as shown in FIG. 10, the narrow coaxial cable 12 and the connector 13 exposed from the waterproof tube 21 to the end side are connected to the through insertion hole 2b of the housing 2 and the housing 3. Pass the through insertion holes 3b, respectively, and attach the waterproof cap 14b at the end of the bundle portion 10 to the fitting portion 2a of the housing 2 and the fitting portion 3a of the housing 3, respectively. Insert. The fitting portions 2a and 3a are portions surrounded by walls so that the waterproof cap 14b enters the housings 2 and 3. The waterproof cap 14b is slightly larger than the fitting portions 2a and 3a, and the waterproof cap 14b is press-fitted into the fitting portions 2a and 3a.

The locations where the waterproof caps 14b are mounted on the housings 2 and 3 are elliptical fitting portions 2a and 3a as viewed in a plane surrounded by the wall surrounding the waterproof caps 14b. The cross sections of the fitting portions 2a and 3a are slightly smaller than the cross sections of the waterproof cap 14b. The waterproof cap 14b is press-fitted into the fitting portions 2a and 3a so that the narrow coaxial cable harness 11b is formed in the housing ( 2, 3). 10 shows a part of the housings 2 and 3 in a cross section in the width direction (arrow A direction in FIG. 1), and shows only one of the plurality of bundle portions 10, but differs in the depth direction of this figure. The bundle part 10 exists.

The protrusion 15 of the waterproof cap 14b is pressed against the fitting portions 2a and 3a of the housings 2 and 3 when the waterproof cap 14b is mounted and collapsed. This crushed part is not crushed in the recessed part between protrusions. The protrusion 15 is always in close contact with the walls of the fitting portions 2a and 3a by the repulsive force (elastic force). Thereby, the waterproof cap 14b and the housings 2 and 3 are reliably connected watertightly. Since the protrusion 15 is integrally molded with the waterproof cap 14b, price can be held down rather than using the 0 ring separately.

And since the waterproof cap 14b and the waterproof tube 21 are watertightly connected, the narrow cap coaxial cable harness is attached to the housing | casings 2 and 3 watertightly as mentioned above. The water is not submerged in the housing 2 or the inside of the housing 3 (connector 13 side) via the 11b.

By the way, when the thickness of the waterproof tube 21 is thickened, the deformation of the waterproof tube 21 can be suppressed and waterproofness can be easily ensured. However, when the thickness of the waterproof tube 21 is thickened, the outer diameter of the waterproof tube 21 is increased. It becomes large and thinning of the narrow coaxial cable harness 11b cannot be aimed at. That is, as the waterproof tube 21, it is preferable to use the thing which makes thickness thin and makes it extremely small, and does not collapse and deform | transform. For this reason, in this embodiment, the thin coaxial cable harness 11b can be thinned using the waterproof tube 21 whose outer diameter is 1.3 mm or less and thickness is 0.1 mm or more and 0.2 mm or less. When the waterproof tube 21 is used as this dimension and the waterproof cap 14b whose hardness is between 50 degrees and 70 degrees in Shore A hardness is used, the waterproof tube 21 is inserted through the waterproof cap 14b. When press-fitting into the hole 16 and applying pressure to the waterproof cap 14b, the flatness ratio of the waterproof tube 21 is 30% or less, and the waterproof tube 21 is collapsed without using a metal tube to penetrate the through insertion hole 16. There is no gap between them. Here, it is "flatness (%) (diameter after pressurization / diameter before pressurization) x100".

Compared with a structure in which a metal tube is pressed into the waterproof tube 21 and the waterproof tube 21 is sandwiched and connected by the metal tube and the waterproof cap 14b, the present embodiment reduces the outer diameter of the waterproof tube 21 to reduce the overall diameter. It can be thin. Thereby, wiring can also be made in narrow wiring space, ensuring favorable waterproofness, and it can be made thin in the housings 2 and 3. In addition, since the metal tube is not used, the price increase can be suppressed, and damage to the waterproof tube 21 due to the metal tube can be suppressed.

In addition, when the outer diameter of the waterproof tube 21 is reduced, the number of insertable narrow coaxial cables 12 to one waterproof tube 21 decreases, but the number of narrow diameter coaxials is increased by increasing the number of waterproof tubes 21. The cable 12 is divided into a plurality of groups and each is waterproofed by the waterproof tube 21.

In addition, in the narrow coaxial cable harness 11b, although the lengths of the waterproof tubes 21 are different from each other in each bundle part 10, if the narrow coaxial cable harness 11b is hardly bent when these, they are these. The length of the waterproof tube 21 may be the same length. In this way, the terminal processing of the narrow coaxial cable 12 and the length of each waterproof tube 21 are appropriately adjusted in accordance with the request of the wiring of the narrow coaxial cable harness 11b in the housings 2 and 3. .

Next, another embodiment according to the present invention will be described.

The narrow coaxial cable harness of this embodiment is connected to the board | substrate in the housings 62 and 63 of apparatuses, such as the mobile telephone 61 shown to FIG. 11 (a) and (b), for example. In this mobile phone 61 example, a display is provided in one housing 62, and a key operation part is provided in the other housing 63. As shown in FIG. The housings 62 and 63 rotate and open and close about the hinges connecting them. In some cases, the overlapping housings 62 and 63 slide and open in the longitudinal direction.

As shown in FIG. 11C, one housing 62 includes a housing main body 62A and a rotation housing 62B that rotates in a plane with respect to the housing main body 62A. One end of the coaxial cable harness is connected to the rotation housing 62B.

As illustrated in FIG. 12, the narrow coaxial cable harness 11c has a plurality of narrow coaxial cables 12 (40 in the present embodiment), and the plurality of narrow coaxial cable harnesses 11 are divided into a plurality of groups (the present embodiment). In the present invention, a plurality of bundle portions 10 (four in the present embodiment), which are bundled together, are provided. At the terminal portions at both ends of the narrow coaxial cable harness 11c, the narrow coaxial cables 12 of the bundles 10 are arranged in a planar shape and connected to the wiring board in the housings 62 and 63 of the mobile telephone 61. A connector 13 for connection is mounted and star-cast.

The length (length of each waterproof tube 21) of each group (bundle portion 10) of narrow coaxial cable 12 can be determined by the shape of the harness. As in the narrow coaxial cable harness 11d shown in FIG. 13, the group (waterproof tube 21) located at the outermost side when being cut may be lengthened. In the case where there are three or more groups (waterproof tubes 21), the lengths may be different for each group. For example, it is preferable that the water-proof tube 21 located outside when bending and cutting is made so that the bending radius difference of 1 mm-2 mm may generate | occur | produce than the water-resistant tube 21 inside. Therefore, it is preferable to make the line length difference of the waterproof tube 21 which adjoins mutually 3 mm or more and 6 mm or less.

In addition, the narrow coaxial cable harnesses 11c and 11d have an integral part 31 in which intermediate portions of the plurality of waterproof tubes 21 are integrated with each other. This integral part 31 is provided by winding the resin tape 32 around the some tube 21 in the part about 20 mm-40 mm in length in the longitudinal direction. As this resin tape 32, what apply | coated the adhesive agent to PET (polyethylene terephthalate) tape can be used. This integral part 31 is arrange | positioned at the hinge part which connects the housings 62 and 63. As shown in FIG.

In this manner, the integral part 31 of the narrow coaxial cable harnesses 11c and 11d can be easily and inexpensively provided in a batch process by tying the plurality of waterproof tubes 21 and winding the resin tape 32. .

In the narrow coaxial cable harnesses 11c and 11d, the waterproof cap 14b has a connection structure between the waterproof cap 14b and the waterproof tube 21 as shown in Figs. The mounting structure of 14b) is also the same as that shown in Figs.

In the mobile telephone 61 to which the narrow coaxial cable harnesses 11c and 11d are wired, the rotation housing 62B is rotated from the state shown to FIG. 14A, and the state shown to FIG. 14B is shown. It is further rotated through, and the state shown in FIG. 14C is obtained. As a result, the rotational housing 62B is rotated 90 degrees with respect to the housing main body 62A. The narrow coaxial cable harness 11c, 11d which passed the bundle part 10 of the several narrow coaxial cable 12 divided | segmented into the bundle of several groups by such a mobile telephone 61 through the several waterproof tube 21 was carried out. When wiring, it twists at the connection location of the housing 62 and the housing 63, and the connection location of the housing main body 62A and the rotational housing 62B.

Since the narrow coaxial cable harness 11c, 11d which concerns on this embodiment is arrange | positioned, the integral part 31 which integrated the bundle part 10 together at the connection location of the housing 62 and the housing 63 is arrange | positioned, Twist of the parts 10 is suppressed. According to the narrow coaxial cable harnesses 11c and 11d according to the present embodiment, since the plurality of narrow coaxial cables 12 are divided into a plurality of bundle portions 10 and penetrated into the waterproof tubes 21, they are thin. Wiring to a narrow accommodating space is possible, and wiring to a thinner device can be easily performed. Moreover, when the casings 62 and 63 are wired together, the connection points of the housings 62 and 63 where the integral part 31 integrated with each other in the intermediate part of the some waterproof tube 21 rotate or slide with each other. If the wiring is arranged so as to be arranged at the connection location between the housing body 62A and the rotation housing 62B that rotate with each other, the twist at these connection locations can be suppressed, and the watertight tube 21 or the narrow coaxial cable therein can be suppressed. Damage to (12) can be prevented.

In the structure of the narrow coaxial cable harnesses 11c and 11d, since the bundle structure includes a plurality of waterproof tubes 21, the twist of the bundle is not directly transmitted, and each waterproof tube 21 is twisted in a threaded shape to each other. Spreads. For example, even if rotation of the housings 62 and 63 and rotation of the rotational housing 62B with respect to the housing 62A are performed about 100,000 times, the damage of the waterproof tube 21 and the narrow coaxial cable 12 inside is prevented. can do. On the other hand, when one thick waterproof tube was twisted, the waterproof tube was broken in less than 60,000 times.

In addition, in the narrow coaxial cable harnesses 11c and 11d, although the integral part 31 was provided in one location of the longitudinal direction, you may provide the some integrated part 31 arrange | positioned at each connection location of housings. Also in this case, the one integral part 31 is arrange | positioned in the part which passes through a hinge.

Moreover, in embodiment, at the edge part of the narrow coaxial cable harness 11b, 11c, 11d, the several narrow cable 12 extended from the waterproof tube 21 of the bundle part 10 of four groups is planar shape. In parallel, although connected to one connector 13, you may divide and connect to several connector 13 like FIG.

Further, the narrow coaxial cable harnesses 11, 11a, 11b, 11c, and 11d can be easily connected to the wiring boards and the like in the housings 2 and 3 by the connectors 13 at both ends. Further, since the narrow coaxial cable 12 has good shielding properties and excellent noise characteristics, stable signal transmission can be performed.

In addition, the narrow coaxial cable harness 11, 11a, 11b, 11c, 11d bundles the bundle part 10 by the braided sleeve which woven the chemical fiber into the tubular shape, for example, or compared with the waterproof tube 21. The slippery bundle tape or thread may be wound in a spiral shape, and this can facilitate the insertion work into the waterproof tube 21.

In addition, the narrow coaxial cable harnesses 11, 11a, 11b, 11c, and 11d connect the narrow coaxial cable 12 to the wiring board directly or via FPC (Flexible Printed Circuits), etc., without mounting the connector 13. It is also applicable.

When directly attaching the narrow coaxial cable 12 to the wiring board, the terminal of the parallel narrow coaxial cable 12 is temporarily fixed with a film or the like to the wiring board, and the center conductor of the terminal of the narrow coaxial cable 12 is fixed. It is good to connect to the connection terminal of a wiring board by soldering. In addition, the external conductor exposed at the terminal part is connected to the ground bar. In this way, the respective outer conductors of the narrow coaxial cable 12 can be gathered together by the ground bar for easy grounding, and a good shielding effect can be obtained. Moreover, the arrangement pitch of each narrow coaxial cable 12 can be fixed favorably.

Instead of the waterproof caps 14 and 14b made of an elastic material, a resin block made of hard resin may be used. In this case, the inner diameter of the through hole of the resin block is made smaller than that of the waterproof tube, and the end of the waterproof tube is press-fitted into the through hole of the resin block. The waterproof tube and the resin block are hermetically connected. And a waterproof adhesive tape is provided in the surface on the opposite side to the connection side with a waterproof tube in a resin block, and a resin block is adhere | attached inside a groove part, fitting a resin block to the groove part of a housing, and a resin block and a housing | casing. Ensure the water tightness of.

The material of the resin block is, for example, a hard resin such as ABS, polycarbonate or polyacetal, and the waterproof adhesive tape is based on, for example, a film made of polyester, and an adhesive is applied to the front and back surfaces of the substrate. It is laminated. As an adhesive agent laminated | stacked on this base material, the adhesive agent of an acryl-type or butyl rubber system is preferable, for example.

Example

(Confidentiality test)

As shown in Fig. 15, a closed pressurized capsule 41 having one surface made of a similar metal film 41a is prepared, and a wall is formed to press the waterproof cap 14b into the bottom of the pressurized capsule 41. The enclosed grooves 42 were formed, and the waterproof caps 14b at both ends of the narrow coaxial cable harness 11b were fitted to these grooves 42, respectively. The end of the waterproof tube 21 was press-fitted into the through insertion hole 16 of the waterproof cap 14b.

In this state, after injecting air from the air inlet 41b of the pressure capsule 41, the air inlet passage 41b is sealed, and the displacement sensor 43 measures the displacement of the pseudo metal film 41a. The presence or absence of the leak of air from the pressurized capsule 41 was examined. In addition, when 0.5 cc or more of air reduced for 10 second after the injection | pouring of air into the pressurization capsule 41, it determined with the leak of air.

Using the waterproof tube 21 having an outer diameter of 1.3 mm, an inner diameter of 1.1 mm and a thickness of 0.1 mm as Example 1, and using the waterproof tube 21 having an outer diameter of 1.6 mm, an inner diameter of 1.4 mm and a thickness of 0.1 mm as Comparative Example 1 did. In addition, in Example 1, four waterproof tubes 21 are press-fitted into each through insertion hole 16 of the waterproof cap 14b which has four through insertion holes 16, and in Comparative Example 1, two Two waterproof tubes 21 were press-fitted into each through insertion hole 16 of the waterproof cap 14b having the through insertion hole 16. The Shore A hardness of the waterproof cap 14b was 60 degrees.

In addition, when the waterproof cap 14b is fitted to the groove portion 42 of the pressure capsule 41, the waterproof cap 14b is compressed, and the waterproof tube 21 is provided with a pressure of 300 kPa in the radial direction.

As a result, in Example 1, there was no leak of air. In contrast, in Comparative Example 1, leakage of air was determined.

Moreover, as shown in FIG. 16, the flatness ratio of the waterproof tube 21 was measured using the pressurizing apparatus 53 provided with the movable rod 52 which advances and retreats with respect to the fixed rod 51. As shown in FIG. Specifically, the waterproof cap 14b, which presses the waterproof tube 21 having an outer diameter of about 1.3 mm into the through insertion hole 16, is sandwiched between the fixing rod 51 and the movable rod 52 to penetrate the through insertion hole 16. ), The flatness of the waterproof tube 21 was measured by pressing in a thickness direction that is a direction orthogonal to the array direction.

As a result of this measurement, in the combination of the waterproof cap and the waterproof tube of Example 1, the flatness ratio of the waterproof tube was 30%. In the combination of the waterproof cap and the waterproof tube of Comparative Example 1, the amount is more than 30%.

From the above evaluation results and measurement results, when a pressure of 300 kPa is applied to the waterproof tube 21, if the flatness is 30% or less, the airtight state with the waterproof cap 14b is securely ensured, I could see what I could get.

That is, as the waterproof tube 21, it was found that the smaller the outer diameter is difficult to flatten against the pressure, thereby ensuring the waterproofness with the waterproof cap 14b.

(Tensile strength test)

The tensile force was applied to the waterproof tube 21 connected to the waterproof cap 14b, and the tensile force at the time when the waterproof tube 21 started to pull out from the waterproof cap 14 was measured. The narrow coaxial cable harness 11b of the structure which concerns on embodiment was set as Example 2. FIG. The results are shown in Table 1.

Tensile force (N) Test No. Example 2 One 1.22 2 1.30 3 1.64 4 1.17

It is sufficient to withstand a tensile force of 1 N in consideration of the force exerted when the narrow cable harness is actually used. As shown in Table 1, it turned out that Example 2 has sufficient tensionability, even without using a metal tube.

Although this invention was detailed also demonstrated with reference to the specific embodiment, it is clear for those skilled in the art that various changes and correction can be added without deviating from the mind and range of this invention.

This application is based on a Japanese patent application filed on February 3, 2011 (Japanese Patent Application No. 2011-021872) and a Japanese patent application filed on July 26, 2011 (Japanese Patent Application No. 2011-162969). Its contents are hereby incorporated by reference.

1, 61: mobile phone 2, 3, 62, 63: housing
2a, 3a: groove portion 10: bundle portion
11, 11a, 11b, 11c, 11d: narrow coaxial cable harness
12: narrow coaxial cable 13: connector
14, 14b: waterproof cap 15: protrusion
16 through hole 17 metal tube
21: waterproof tube 31: integral part

Claims (16)

In narrow coaxial cable harness,
A watertight cap having a plurality of narrow coaxial cables, a plurality of waterproof tubes, and a plurality of through holes,
At least a part of the narrow coaxial cable is divided into a plurality of groups except for the terminal portion, and the groups are each inserted into the waterproof tube so that the positional relationship between the narrow coaxial cables can be changed. Are penetrated into the through insertion holes, respectively;
The waterproof cap is hermetically and collectively connected to ends of the plurality of waterproof tubes.
A narrow coaxial cable harness. The method of claim 1,
A metal tube is pressed into the inside of the waterproof tube,
The waterproof cap is made of an elastic material, characterized in that the waterproof tube is interposed in the thickness direction by the waterproof cap and the metal tube is compressed.
A narrow coaxial cable harness. 3. The method according to claim 1 or 2,
The waterproof cap is made of an elastic material, characterized in that the outer periphery of the waterproof cap is formed with a protrusion protruding in the direction orthogonal to the axial direction of the through insertion hole.
A narrow coaxial cable harness. The method of claim 1,
The waterproof tube has an outer diameter of 1.3 mm or less, and the flatness ratio of the waterproof tube is 30% or less when the waterproof tube is press-fitted into the through insertion hole of the waterproof cap to apply a pressure of 300 kPa to the waterproof cap. By
A narrow coaxial cable harness. The method of claim 1,
The hardness of the waterproof cap is a value between 50 degrees and 70 degrees in Shore A hardness,
The waterproof tube has a thickness of 0.1 mm or more and 0.2 mm or less.
A narrow coaxial cable harness. The method according to any one of claims 1, 2, 4 or 5,
At least one waterproof tube is different in length from the other waterproof tube
A narrow coaxial cable harness. The method of claim 3, wherein
At least one waterproof tube is different in length from the other waterproof tube
A narrow coaxial cable harness. The method according to any one of claims 1, 2, 4 or 5,
An intermediate part of each said waterproof tube has an integral part integrated with each other
A narrow coaxial cable harness. The method of claim 3, wherein
An intermediate part of each said waterproof tube has an integral part integrated with each other
A narrow coaxial cable harness. The method according to claim 6,
An intermediate part of each said waterproof tube has an integral part integrated with each other
A narrow coaxial cable harness. In the manufacturing method of the narrow coaxial cable harness provided with the some narrow coaxial cable, the some waterproof tube, and the waterproof cap which has a some through insertion hole,
Dividing at least a portion other than the terminal portion of the plurality of narrow coaxial cables into a plurality of groups,
Each group is inserted through the waterproof tube so that the positional relationship between each of the three narrow coaxial cables can be changed, and the through insertion hole is passed through,
Characterized in that the waterproof cap is connected to the ends of the plurality of waterproof tubes in a watertight manner.
Method for manufacturing a narrow coaxial cable harness. The method of claim 11,
The cap is made of an elastic material,
A metal tube is pressed into the watertight tube, and the watertight tube is compressed through the watertight cap and the metal tube in the thickness direction.
Method for manufacturing a narrow coaxial cable harness. The method of claim 11,
The waterproof tube has an outer diameter of 1.3 mm or less, and the flatness ratio of the waterproof tube is 30% or less when the waterproof tube is press-fitted into the through insertion hole of the waterproof cap to apply a pressure of 300 kPa to the waterproof cap. By
Method for manufacturing a narrow coaxial cable harness. The method of claim 11,
The hardness of the waterproof cap is a value between 50 degrees and 70 degrees in Shore A hardness,
The waterproof tube has a thickness of 0.1 mm or more and 0.2 mm or less.
Method for manufacturing a narrow coaxial cable harness. The method of claim 11,
Characterized in that the length of the at least one waterproof tube is different from the length of the other waterproof tube.
Method for manufacturing a narrow coaxial cable harness. 16. The method according to any one of claims 11 to 15,
Integrating the middle portion of each of the waterproof tube, characterized in that
Method for manufacturing a narrow coaxial cable harness.

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