JPH0414869Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention has a waterproof sealing member interposed between the wire and the housing at the connection part of the wire to prevent water from entering the inside of the connector. This relates to the waterproof structure of the connection terminal.

[Prior Art] Conventionally, as a waterproof structure for this type of connection terminal, a cylindrical waterproof seal member is fitted around the insulation coating of the end of the wire to which the connection terminal is crimped, and the waterproof seal member is used to protect the connector. A device that seals between the housing and the electric wire is known. In addition, crimp-type connection terminals that have been widely used in the past have a core crimping part that crimps the core wire at the end of the wire, and a covering crimping part that crimps the insulation covering part, but the insulation covering part is sealed with a waterproof seal. When the member is fitted, the covering crimp portion will hug the waterproof seal member.

[Problems to be solved by the invention] However, since the insulation coating at the end of the wire cannot be directly crimped, if the insulation coating is pulled by an external force, the insulation coating will fall off and the core wire will be exposed. There is a risk that it will happen. Furthermore, in severe cases, the core wire may slip out from the core wire crimping section.

[Purpose of the invention] The purpose of the invention is to improve the above-mentioned problems.
It is an object of the present invention to provide a highly reliable waterproof structure for a connecting terminal in which the insulating coating portion of the end of a wire can be securely held by the connecting terminal from the outside of a waterproof sealing member.

[Summary of the invention] The gist of the invention to achieve the above objectives is as follows:
U-shaped first and second crimping parts are provided at the rear end of a connection terminal formed by punching and bending a conductive metal plate,
The core wire of the end of the wire is crimped by the first crimping part, and a sealing material made of an elastic material is attached to both the inner and outer surfaces of the rear end of the cylindrical base made of a hard material. A waterproof sealing member having a through hole in the front end is inserted into the insulating coating of the end of the electric wire, the periphery of the front end of the cylindrical base is tightened by the second crimping part, and the second crimping part is tightened. The waterproof structure of the connection terminal is characterized in that both ends of the crimping part are bitten into the insulating coating of the end of the electric wire through the through hole.

[Embodiments of the invention] The invention will be described in detail based on illustrated embodiments.

FIG. 1 shows a perspective view of the waterproof structure of the connection terminal according to the present invention, in which 1 is a crimp-type connection terminal, 2 is an electric wire,
3 indicates a waterproof sealing member fitted around the insulating coating 2b at the end of the electric wire. Fig. 2 is a perspective view of the connection terminal 1 and the waterproof seal member 3 before assembly, Fig. 3 is a cross-sectional perspective view of the cover crimping part, and Fig. 4 is a cross-section of the connection terminal 1 housed in the housing. It represents a diagram.

The connecting terminal 1 has a U-shaped core wire crimping part 1a which crimps the core part 2a of the electric wire 2 excluding the insulation coating 2b, and a covering crimping part 1b which crimps the insulation coating 2b of the electric wire 2, as usual. However, in this embodiment, bent portions 1c are provided at both ends of the covering crimping portion 1b. The waterproof sealing member 3 has a cylindrical base 4 made of, for example, a hard synthetic resin material, and sealing material 5 made of an elastic material such as synthetic rubber is attached to both the inner and outer surfaces of the cylindrical base 4. For example, as shown in FIG.
A sealing material 5 is integrally molded on both the inner and outer surfaces of the cylindrical base body 4 through the communication hole 4c, and a flange 4 is provided at the end of the small diameter portion 4a.
d is provided. In the illustrated example, the sealing material 5
An annular protrusion 5a that is press-contacted to the insulation coating 2b of the electric wire 2 and an annular protrusion 5b that is press-contacted to the inner surface of the housing are provided in each of the parts. The examples are not limited. In addition, the small diameter portion 4a of the cylindrical base 4
A through hole 6 is provided in the longitudinal direction through which the bent portions 1c at both ends of the covering crimping portion 1b can pass.

Therefore, when crimping and connecting the electric wire 2 to the connecting terminal 1, the waterproof seal member 3 is inserted into the electric wire 2 with the core wire portion 2a at the end exposed, and the waterproof seal member 3 is fitted around the insulation coating 2b. In this state, connect terminal 1
The core wire portion 2a is crimped by the core wire crimping portion 1a.
At the same time, if the cover crimping portion 1b is tightened around the small diameter portion 4a of the waterproof seal member 3, and the bent portions 1c at both ends are passed through the through holes 6 and crimped, the bent portion 1
It can be bitten into the insulating coating 2b at the tip of c. In this state, the cover crimping part 1b is hooked to the flange 4d, and the bent part 1
The tip of c is in a state where it bites into the insulation coating 2b as shown in FIG.

The connection terminal 1 with the waterproof seal member 3 attached is
As shown in FIG. 4, a locking member 8 is attached to the housing 7 to prevent the connection terminal 1 and the waterproof seal member 3 from coming off.

In this way, in this embodiment, the bent portion 1c of the insulation crimping portion 1b of the connection terminal 1 is cut directly into the insulation insulation 2b of the electric wire 2, so that the insulation insulation 2b
b can be held reliably. Furthermore, since the bent portion 1c of the connecting terminal 1 is inserted into the through hole 6 of the cylindrical base 4 made of a hard material of the waterproof seal member 3,
Looseness in the axial and circumferential directions between the connection terminal 1 and the waterproof seal member 3 can also be eliminated.

[Effects of the invention] As explained above, the waterproof structure of the connection terminal according to the invention consists of inserting a waterproof sealing member made of a cylindrical base made of a hard material and a sealing material made of an elastic material into the end of the wire to be crimped to the connection terminal. The tip of the second crimp part of the connection terminal that tightens around the waterproof seal member is inserted into the insulation coating through the through hole of the cylindrical base, so the end of the wire can be held securely. is possible,
Provides sufficient strength against the tensile force applied to the wire,
There is no risk of the core wire being exposed. Furthermore, the waterproof seal member can be reliably attached to the connecting terminal without wobbling, and the waterproof reliability of this type of connecting terminal can be ensured.

[Brief explanation of the drawing]

The drawings show an embodiment of the waterproof structure of the connecting terminal according to the present invention, and FIG. 1 is a perspective view of the waterproof structure of the connecting terminal, FIG. 2 is a perspective view of the connecting terminal and the waterproof seal member before assembly, and FIG. FIG. 3 is a cross-sectional perspective view of the covering crimping portion, FIG. 4 is a cross-sectional view of the electric wire connection portion housed in the housing, and FIG. 5 is a cross-sectional view of the waterproof seal member. 1 is a connecting terminal, 1a is a core wire crimping part, 1b is a covering crimping part, 1c is a bending part, 2 is an electric wire, 3 is a waterproof sealing member, 4 is a cylindrical base, 5 is a sealing material, 6 is a through hole, 7 is the housing.

Claims (1)

[Scope of utility model registration request] U-shaped first and second crimping parts are provided at the rear end of the connection terminal formed by punching and bending a conductive metal plate, and the core part of the end of the electric wire is crimped by the first crimping part. A sealing material made of an elastic material is attached to both the inner and outer surfaces of the rear end of a cylindrical base made of a hard material, and a waterproof sealing member with a through hole provided at the front end of the cylindrical base is attached to the end of the electric wire. The electric wire is inserted into the insulating coating, the periphery of the front end of the cylindrical base body is tightened by the second crimping part, and both tips of the second crimping part are passed through the through hole and the end of the electric wire is tightened. The waterproof structure of the connection terminal is characterized by being cut into the insulation coating.