Sealing-up structure of insulate line

Abstract

A water cutoff structure of a covered wire according to the invention is characterized in a water cutoff structure of a covered wire comprising an upper side member and a lower side member for carrying out water cutoff to the covered wire by sandwiching a covered wire constituted by covering core lines by a pair of water cutoff members made of a resin respectively provided at the upper side member and the lower side member to be subjected to ultrasonic welding, in which the lower side member of the water cutoff structure is provided with a pair of locking portions and the pair of locking portions are respectively fitted to a pair of locking portions provided to correspond to the upper side member. According to the structure, ultrasonic vibration energy is transmitted to concentrate on a welded portion. Therefore, ultrasonic wave energy is efficiently transmitted and time period dissipated in welding is shortened.

Description

technical field [0001] The present invention relates to a waterproof structure of a covered wire used in electric wiring systems such as automobiles, and more particularly to a structure in which a covered wire made of a covered core wire is sandwiched between a water-stopping element made of resin and ultrasonically welded to seal the water of the covered wire . Background technique [0002] In the automotive electrical wiring system, water can continuously intrude between the core wires of the covered wire through the gap, so the water can reach the inside of the control unit and other equipment. In order to prevent water intrusion, the electrical wiring system used in the part where water intrusion is usually provided with a water-stop structure. [0003] As an example of this type of water-stop structure, there is an existing structure that encapsulates the connection portion of the wire terminal exposed at the portion where water may intrude by heat-melting and heat-me...

AI Technical Summary

Problems solved by technology

[0008] According to the structure of the above-mentioned water-stop part, there is no structure to concentrate the ultrasonic welding energy to the part to be welded, so the welding time is prolonged and the cost is increased

[0009] Moreover, as shown in Figures 14 and 15, due to the unsealed structure, there is also the problem of poor water-stop function

[0010] Furthermore, the melted cover of the electric wire protrudes to the outside and damages the cover of the electric wire other than the welded portion, and there arises a problem that stable adhesion and stable insulating performance of the electric wire cannot be ensured.

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