JP2015015379A - Cable conduit structure, electronic apparatus, and cable conduit method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable conduit structure in which positioning of a cable can be easily performed when a conduit is molded with resin, and clearance of the quality problem and reduction in cycling time can be achieved.SOLUTION: Disclosed is a cable conduit structure 1 which includes: one or more conducting wires 21; insulators 22 individually covering the conducting wires 21; a cable 2 made of a sheath 23 collectively covering the insulators 22; and a conduit 3 which is molded with resin while straddling the sheath 23 end of the cable 2 and the insulators 22. The sheath 23 is composed of two sheaths 23a, 23b which are cut and have a space therebetween, and a cable type tightening line is located on two sheaths 23a, 23b when the conduit 3 is molded with resin.

Description

  The present invention includes one or more conductors, an insulator that individually covers the conductors, a cable that includes a sheath that collectively covers the insulators, and a conduit that is resin-molded across the sheath end of the cable and the insulator. Cable conduit structure, electronic equipment, and cable conduit method.

  When a cable is inserted into and out of the electronic device, a hole for inserting the cable is inevitably provided in the casing of the electronic device. On the other hand, intrusion of liquid (water, oil, etc.) into the housing through this hole may adversely affect the electronic device main body (electronic circuit, etc.). Therefore, a resin-molded conduit is provided around the cable, and a sealing structure is formed by fitting the conduit with a hole (see, for example, Patent Document 1). At this time, as shown in FIG. 8, the conduit 3 is resin-molded across the end of the sheath 23 of the cable 2 and the insulator 22 covering the conductive wire 21, thereby sealing between the sheath 23 and the insulator 22. It can be performed.

JP 2010-205894 A

  However, in the prior art, when the conduit 3 is resin-molded, as shown in FIG. 9, there is a problem that a precise positional accuracy is required for the set of cables 2 (in the example shown in FIG. 9, the cable type It is necessary to make the width of the sheath 23 of the cable 2 arranged so as to protrude from the fastening line be 0.7 mm). That is, when the resin molding of the conduit 3 is performed, the sheath 23 of the cable 2 before and after the cable clamping line is extended by the influence of the clamping pressure. Position accuracy is required. Therefore, there has been a problem that quality problems and increase in cycle time (cost) occur.

  The present invention has been made to solve the above-described problems, and can easily position a cable when a conduit is molded with resin, thereby eliminating quality problems and reducing cycle time. An object of the present invention is to provide a cable conduit structure, an electronic device, and a cable conduit method that can be used.

  The cable conduit structure according to the present invention is resin-molded across one or more conductors, a cable that individually covers the conductors, and a sheath that collectively covers the insulators, and a sheath end of the cable and the insulator. In the cable conduit structure including the conduit, the sheath is composed of two sheaths that are cut and have a gap, and the cable clamping line is positioned on the two sheaths during resin molding of the conduit. .

  Further, the cable conduit method according to the present invention includes a cable comprising one or more conductors, an insulator that individually covers the conductors, and a sheath that collectively covers the insulators, and a resin straddling the sheath end and the insulator of the cable. In a cable conduit method of a cable conduit structure including a molded conduit, a sheath strip step in which a sheath is cut into two sheaths having a gap, and after the sheath strip step, the cable is connected to a conduit molding die. Arrangement step for arranging the cable clamping line on the two sheaths on the lower mold, and a resin molding step for attaching the upper mold of the conduit molding die after the arrangement step and performing resin molding of the conduit It has.

  According to this invention, since it comprised as mentioned above, when carrying out resin molding of a conduit, positioning of a cable can be performed easily, and elimination of a quality problem and reduction of cycle time can be aimed at.

It is a figure which shows the structure of the cable conduit structure which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the cable in Embodiment 1 of this invention. It is a flowchart which shows the cable conduit method which concerns on Embodiment 1 of this invention. It is a figure explaining the positioning of the cable at the time of performing resin molding of the conduit in Embodiment 1 of this invention. It is a figure explaining the extension of the sheath by the mold clamping pressure at the time of performing resin molding of the conduit in Embodiment 1 of this invention. It is a figure which shows the structure of the electronic device to which the cable conduit structure based on Embodiment 1 of this invention was applied. It is a figure which shows the structure of the cable in Embodiment 2 of this invention. It is a figure which shows the structure of the conventional cable conduit structure, (a) It is a figure which shows the structure of a cable, (b) It is a figure which shows the structure of a cable conduit structure. It is a figure explaining the subject of the conventional cable conduit structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a cable conduit structure 1 according to Embodiment 1 of the present invention, and FIG. 2 is a diagram showing a configuration of a cable 2.
As shown in FIG. 1, the cable conduit structure 1 includes a cable 2 and a conduit 3 provided on the outer periphery of the cable 2. The cable 2 is provided with one or more conducting wires 21. In the example of FIG. 1, a cable 2 having three conducting wires 21 is shown. The conducting wires 21 are individually covered with an insulator 22. The insulator 22 is collectively covered with a sheath 23. The conduit 3 is resin-molded across the sheath 23 end of the cable 2 and the insulator 22.

  Here, as shown in FIG. 2, the sheath 23 is composed of two sheaths 23a and 23b which are cut and have a gap. The gap between the two sheaths 23a and 23b is set such that the cable clamping line is positioned on the two sheaths 23a and 23b when the conduit 3 is molded with resin.

Next, a method for forming the cable conduit structure 1 configured as described above will be described with reference to FIG.
When the cable 3 is resin-molded to form the cable conduit structure 1, as shown in FIG. 3, first, a part of the end of the sheath 23 of the cable 2 is cut, and two sheaths 23a, 23b is configured (step ST1, sheath strip step). Thus, the cable 2 having the sheaths 23a and 23b as shown in FIG. 2 is configured.

  Next, the cable 2 is placed in the lower mold of the conduit molding die (step ST2, placement step). At this time, as shown in FIG. 4, the cable 2 is positioned so that the cable clamping line located on the surface to be sealed hits the two sheaths 23 a and 23 b having a gap.

  Next, the upper mold of the conduit molding die is attached and resin molding of the conduit 3 is performed (step ST3, resin molding step). Thereby, the seal | sticker between sheath 23a, 23b and the insulator 22 can be performed. During resin molding, as shown in FIG. 5, the two sheaths 23 a and 23 b to which the cable clamping line hits each extend in the axial direction due to the clamping pressure. For this reason, it is possible to reduce the occurrence of sealing failure and protrusion failure of the sheath 23 without requiring strict accuracy in positioning the cable 2. Therefore, quality can be ensured and cycle time can be reduced.

Next, FIG. 6 shows a case where the cable conduit structure 1 configured as described above is attached to the electronic device 4.
Here, the electronic device 4 is provided with an electronic circuit 41 to which the conductive wire 21 of the cable conduit structure 1 is connected, as shown in FIG. Further, the electronic device 4 is provided with a housing 43 that has a hole 42 that can be engaged with the conduit 3 and that includes an upper member 43a and a lower member 43b. The housing 43 encloses the electronic circuit 41 side from the electronic circuit 41 and the conduit 3 of the cable conduit structure 1.

  As described above, according to the first embodiment, the cable 2 which is sheath-striped in two stages is used, and the cable 2 is placed so that the cable mold clamping line of the conduit molding die hits both the sheaths 23a and 23b. Since the sheaths 23a and 23b are extended in the axial direction by mold clamping pressure when the conduit 3 is molded with resin, precise positioning accuracy is not necessary, ensuring quality and reducing cycle time. Is possible.

Embodiment 2. FIG.
In the first embodiment, the case where sealing is performed between the sheaths 23 a and 23 b and the insulator 22 using the sheathed cable 2 has been described. However, in this case, the seal between the insulator 22 and the conductive wire 21 is not performed, and there is a risk that liquid (water, oil, etc.) may enter from there. Therefore, in the second embodiment, a case where sealing is performed between the insulator 22 and the conductive wire 21 will be described.

  In this case, as shown in FIG. 7, when the sheath is stripped, the insulator 22 is further cut between the two sheaths 23a and 23b to form two insulators 22a and 22b having a gap. Thereafter, the resin molding of the conduit 3 is performed as in the first embodiment. Thereby, the seal | sticker between the insulators 22a and 22b and the conducting wire 21 can also be performed simultaneously with performing the seal | sticker between the sheaths 23a and 23b and the insulator 22. FIG.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

DESCRIPTION OF SYMBOLS 1 Cable conduit structure 2 Cable 3 Conduit 4 Electronic device 21 Conductor 22, 22a, 22b Insulator 23, 23a, 23b Sheath 41 Electronic circuit 42 Hole 43 Case 43a Upper member 43b Lower member

Claims (4)

One or more conductors, an insulator that individually covers the conductors, a cable that includes a sheath that collectively covers the insulators, and a conduit that is resin-molded across the sheath end of the cable and the insulator In cable conduit structure,
The sheath is composed of two sheaths which are cut and have a gap, and a cable clamping line is positioned on the two sheaths when the conduit is molded with resin. The cable conduit structure according to claim 1, wherein the insulator includes two insulators that are cut and have a gap between the two sheaths. An electronic circuit to which a conductor of the cable conduit structure according to claim 1 or 2 is connected,
An electronic device comprising: a hole having a hole that can be fitted with the conduit; and a housing that includes the electronic circuit and the electronic circuit side from the conduit of the cable conduit structure. One or more conductors, an insulator that individually covers the conductors, a cable that includes a sheath that collectively covers the insulators, and a conduit that is resin-molded across the sheath end of the cable and the insulator In the cable conduit method of the cable conduit structure,
A sheath strip step that cuts the sheath into two sheaths with a gap;
After the sheath strip step, an arrangement step of arranging the cable in a lower mold of the conduit molding die so that a cable mold clamping line is positioned on the two sheaths;
A cable conduit method comprising: a resin molding step of attaching an upper mold of the conduit molding die and resin molding of the conduit after the arranging step.

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