JP2014110092A - Water cut-off structure of covered conductor - Google Patents

Abstract

Water-stop processing of a covered electric wire is easy and reliable.
A water stop structure for a covered wire includes a connection terminal having first and second connection portions that are electrically connected to the covered wire, and first and second connection portions. 12, a partition portion 13 that divides the coated wire 1 into two parts, and a waterproof case including an upper waterproof case 21 and a lower waterproof case 22 that surround the connection terminal 10 and an arbitrary portion of the coated wire 1. 13 divides the covered electric wire 1 into two, and prevents the water that has entered the covered electric wire from the terminal portion on the wet side from being transmitted to the other end.
[Selection] Figure 1

Description

  The present invention relates to a water stop structure for stopping water that has entered a covered electric wire from a terminal portion on the water-receiving side at an arbitrary location in a wiring path.

  Conventionally, a water stop structure disclosed in Patent Document 1 below is known as a water stop structure of a covered electric wire. This water stop structure is composed of a pressure contact terminal that tears off the sheath of the covered electric wire press-fitted into the slot portion to expose the internal conductor, a case body that covers the pressure contact terminal and the like, and a sealing material that fills the case body. The material is stopped by infiltrating the gap between the internal conductors from the portion where the internal conductors are exposed.

Japanese Patent No. 3446656

  However, in the water stop structure of the prior art disclosed in the above-mentioned Patent Document 1, it is necessary to infiltrate the sealing material filled in the case body so that the gap between the inner conductors is completely filled. If the sealing material does not penetrate sufficiently, there is a problem that it is difficult to stop water.

  An object of the present invention is to provide a water stop structure for a covered electric wire that can solve the above-described problems of the prior art and can reliably stop water.

  The water stop structure of the covered electric wire according to the present invention includes a connection terminal having first and second connection portions electrically connected to the covered electric wire, and the covered electric wire between the first and second connection portions. And a waterproof case that surrounds at least the second connection portion and the partition portion, and the second connection portion is connected to a terminal portion that is on the water side of the partition portion. It is arrange | positioned in the distant position.

According to the water stop structure for a covered electric wire according to the present invention, the covered electric wire is divided (divided) into two by a partitioning portion between the first and second connecting portions of the connection terminal, so that the water is stopped. Filling with such a sealing material is unnecessary, facilitating water-stop processing, and water that has traveled through the inner conductor of the covered electric wire can be reliably stopped.
In addition, the covered electric wire divided into two at the dividing portion (division) is ensured to be electrically connected by the connection terminal.

  In one Embodiment of this invention, the said division | segmentation part is formed in the said connection terminal.

  In another embodiment of the present invention, the partition portion is formed in the waterproof case.

  In still another embodiment of the present invention, the waterproof case has a drainage portion for discharging water inside the case below.

  ADVANTAGE OF THE INVENTION According to this invention, the water stop process of a covered electric wire is easy and can stop water reliably.

It is sectional drawing which shows the water stop structure of the covered electric wire which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the connecting terminal used for the water stop structure of the said covered electric wire. It is sectional drawing which shows the water stop structure of the covered electric wire which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the water stop structure of the covered electric wire which concerns on the 3rd Embodiment of this invention. It is sectional drawing which shows the water stop structure of the covered electric wire which concerns on the 3rd Embodiment of this invention.

  Hereinafter, with reference to the attached drawings, a waterproof structure for a covered electric wire according to an embodiment of the present invention will be described in detail. FIG. 1 is a cross-sectional view showing a water stop structure of a covered electric wire according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a connection terminal used in a water stop structure for a covered electric wire. As shown in FIG. 1, the water stop structure of the covered wire according to the present embodiment is configured as follows.

  That is, the water-stop structure includes a covered electric wire 1 to be water-stopped, a delimiter 13 that divides (divides) a predetermined portion of the covered electric wire 1 into two, and a covered electric wire 1 that is divided into two (divided). A connection terminal 10 that electrically connects both sections, and an upper waterproof case 21 and a lower waterproof case 22 as a waterproof case that accommodates the covered wire 1 and the connection terminal 10 are configured. The covered electric wire 1 is, for example, an earth wire applied to a vehicle, and has a structure in which a core wire 2 formed by twisting a plurality of thin internal conductors is covered with a covering 3 such as a resin.

  In the covered electric wire 1 having such a structure, water permeates into the covered electric wire (the gap between the covering 3 and the core wire 2 or the gap between the inner conductors of the core wire 2) from the terminal portion on the wet side by a capillary phenomenon. The water may be transmitted to the terminal portion on the other end side. Therefore, in the water stop structure according to the present embodiment, in the upper and lower waterproof cases 21 and 22 at any location of the covered electric wire 1, the water that has entered the covered electric wire from the terminal portion on the wet side is stopped, Water is prevented from penetrating into the terminal portion on the other end side.

Specifically, as illustrated in FIG. 2, the connection terminal 10 includes a first connection portion 11 and a second connection portion 12 that are electrically connected to different portions of the covered electric wire 1, respectively. And the structure which further has the division part 13 which divides the covered electric wire 1 into two between the 2nd connection parts 11 and 12. As shown in FIG. The first and second connection portions 11 and 12 include bifurcated press contact blades 11 a and 12 a that, for example, tear the coating 3 of the covered electric wire 1 and come into contact with the core wire 2, and are erected on the end side of the connecting portion 14. ing.
In FIG. 2, the second connection portion 12 is a connection portion that is disposed at a position farther from the terminal portion on the wet side than the first connection portion 11 and the partitioning portion 13.

The delimiter 13 includes a cutting blade 13 a that cuts the covered electric wire 1 together with the covering 3 and the core wire 2, and is erected on the connecting portion 14 between the first and second connecting portions 11 and 12. In the connection terminal 10 configured in this way, the covered wire 1 is electrically connected to the first and second connection parts 11 and 12, and at the same time, is divided into two parts (separation) between them by the partition part 13. )
As a result, the water that has entered the covered electric wire as described above is reliably shut off and stopped at the partition portion by the partitioning portion 13.

  The upper waterproof case 21 and the lower waterproof case 22 are U-shaped resin molded members that can be fitted to each other from above and below. In this example, the upper waterproof case 21 and the lower waterproof case 22 are formed so as to cover an arbitrary portion of the covered electric wire 1 together with the entire connection terminal 10. For example, the lower waterproof case 22 has a slit portion 22a through which the covered electric wire 1 passes. The contact portion of the slit portion 22a with the covered electric wire 1 may be subjected to waterproofing treatment using an O-ring or the like.

  In the water stop structure according to the present embodiment, it is not necessary to separately fill the upper and lower waterproof cases 21 and 22 with a conventional sealing material or the like, so that the water stop processing of the covered electric wire 1 becomes easy. Moreover, since the covered electric wire 1 is divided (divided) into two, water that has entered the covered electric wire from the terminal portion on the water-receiving side can be reliably stopped. In addition, although illustration is abbreviate | omitted, the structure where the upper and lower waterproof cases 21 and 22 cover at least the partition part 13 and the 2nd connection part 12 in the position away from the terminal part of the to-be-watered side rather than a partition part. If it is good.

  Moreover, the 1st and 2nd connection parts 11 and 12 may be provided with the stab connection structure which pierces the covered electric wire 1, for example, the connection structure by welding other than the press-contact structure by the press-contact blade 11a, 12a. According to this water stop structure, the electrical continuity by the core wire 2 of the covered electric wire 1 causes the first and second connection parts 11 and 12 and the connection part 14 of the connection terminal 10 in the upper and lower waterproof cases 21 and 22 to be connected. Secured through.

  FIG. 3 is a cross-sectional view showing the water stop structure of the electric wire according to the second embodiment of the present invention. As shown in FIG. 3, the water blocking structure of the covered wire according to the second embodiment is that the partition portion 13 is provided not in the connection terminal 10 but in the upper waterproof case 21 according to the first embodiment. It is different from the waterproof structure of the covered wire.

  That is, the connection terminal 10 includes first and second connection portions 11 and 12 having pressure contact blades 11 a and 12 a, respectively, and between the first and second connection portions 11 and 12 on the inner wall surface 21 a of the upper waterproof case 21. A partitioning portion 13 extending in the direction of the connecting portion 14 of the connection terminal 10 is provided at a corresponding location.

  In the water stop structure of the covered electric wire according to the second embodiment configured as described above, the water stop processing of the electric wire 1 is easy as in the water stop structure of the covered electric wire according to the first embodiment. The water that has entered can be reliably stopped at the partitioning section 13.

  FIG.4 and FIG.5 is sectional drawing which shows the water stop structure of the covered electric wire which concerns on the 3rd Embodiment of this invention. As shown in FIGS. 4 and 5, the waterproof structure of the covered wire according to the third embodiment is different from the waterproof structure of the covered wire according to the first and second embodiments in that the structure of the waterproof case is different. It is different. That is, in the case shown in FIG. 4, a waterproof case composed of the left waterproof case 23 and the right waterproof case 24 having a shape obtained by rotating the upper waterproof case 21 and the lower waterproof case 22 around the covered electric wire 1 by 90 ° is adopted. Has been.

  The inner wall surfaces 23a and 24a below the left and right waterproof cases 23 and 24 constitute inclined surfaces, respectively, and a drainage portion 23b in which a mating surface of the inner wall surfaces 23a and 24a is omitted from a part of the left waterproof case 23. Is formed. Thereby, the water which accumulates below in a waterproof case can be discharged | emitted effectively from the drainage part 23b. In addition, as shown in FIG. 5, the inner bottom surface 22 b of the lower waterproof case 22 may be an inclined surface, and a hole-shaped drainage portion 23 b may be formed in a part so that drainage is performed in the same manner.

DESCRIPTION OF SYMBOLS 1 Covered electric wire 2 Core wire 3 Covering 10 Connection terminal 11 1st connection part 11a, 12a Pressure contact blade 12 2nd connection part 13 Separation part 13a Cutting blade 21 Upper waterproof case 22 Lower waterproof case

Claims (4)

A connection terminal having first and second connection portions electrically connected to the covered electric wire;
A partition section that divides the covered electric wire into two parts between the first and second connection sections;
A waterproof case surrounding at least the second connection portion and the partition portion;
The said 2nd connection part is arrange | positioned in the position away from the terminal part of the to-be-watered side rather than the said division | segmentation part. The waterproof structure of the covered electric wire characterized by the above-mentioned. The water stop structure for a covered electric wire according to claim 1, wherein the partition portion is formed on the connection terminal. The water stop structure for a covered electric wire according to claim 1, wherein the partition portion is formed in the waterproof case. The waterproof case for a covered electric wire according to any one of claims 1 to 3, wherein the waterproof case has a drainage portion for discharging water inside the case below.

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