JPH0421264Y2 - - 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 coating, but the insulation coating part is sealed with a waterproof seal. When the member is fitted, the covering crimp portion will hug the waterproof seal member.

However, the connection between the covering crimping part and the waterproof sealing member tends to become loose, and sufficient strength may not be obtained, which may lead to problems later on.

[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 a waterproof sealing member can be securely held on the connecting terminal by a crimped portion of the connecting terminal.

[Summary of the invention] The gist of the invention to achieve the above purpose 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 first crimping part crimps the core wire of the end of the wire, and the second crimping part crimps the periphery of the front end of the waterproof sealing member fitted to the insulation coating of the end of the wire. In the waterproof structure of the connection terminal that is tightened, the waterproof sealing member is composed of a cylindrical base made of a hard material and a sealing material made of an elastic material attached to both the inner and outer surfaces of the rear part of the cylindrical base, and the front end of the waterproof sealing member is A concave portion or a convex portion is provided around the cylindrical base of the part for restricting movement in the axial direction and rotational direction with respect to the connecting terminal, and the second crimp portion of the connecting terminal is tightened around the concave portion or convex portion. This is a waterproof structure of a connecting terminal characterized by providing a convex portion or a concave portion that fits into a concave portion or a convex portion of a base body.

[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. 2 is a perspective view of the connecting terminal 1 and the waterproof seal member 3 before assembly, FIG. 3 is a cross-sectional perspective view of the waterproof seal member 3,
FIG. 4 shows a cross-sectional view of the connecting terminal 1 with the waterproof seal member 3 attached thereto housed in the housing.

The connection terminal 1 includes a U-shaped core wire crimping portion 1a that crimps the core wire portion 2a from which the insulation coating 2b of the wire 2 has been peeled off as usual, and a seal crimping portion that crimps the waterproof seal member 3 inserted into the wire 2. 1b, but in this embodiment, the seal crimping part 1b
is provided with two locking protrusions 1c that protrude inward. The waterproof sealing member 3 is provided on both the inner and outer rear surfaces of the cylindrical base body 4 made of, for example, a hard synthetic resin material.
A seal 5 made of an elastic material such as synthetic rubber is attached. A locking hole 4 is provided at the front portion of the cylindrical base body 4 at a position corresponding to the locking projection 1c of the seal crimping portion 1b.
a, and the sealing material 5 is provided with an annular protrusion 5a that is pressed against the insulation coating 2b of the electric wire 2, and an annular protrusion 5b that is pressed against the inner surface of the housing.

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, by tightening the seal crimping part 1b around the waterproof seal member 3, the locking protrusion 1c of the seal crimping part 1b locks into the locking hole 4a of the cylindrical base body 4.
can be engaged with.

The connection terminal 1 with the waterproof seal member 3 attached is
As shown in FIG. 4, a locking protrusion 7 is attached to the housing 6 to prevent the connection terminal 1 and the waterproof seal member 3 from coming off.
Further, by pushing in the locking protrusion 7, the connection terminal 1 can be pushed in deep through the waterproof sealing material 3.

FIG. 5 shows another embodiment, in which the seal crimping part 1 is provided with an engagement hole 1e, and the cylindrical base 4 is provided with an engagement hole 1e.
is provided with locking projections 4b that protrude outward, and these engagement holes 1e and locking projections 4b are adapted to engage with each other.

[Effects of the invention] As explained above, the waterproof structure of the connection terminal according to the invention is such that a waterproof seal member is fitted to the end of the wire that is crimped to the connection terminal, and the connection terminal is tightened around the waterproof seal member. Since a part of the seal crimp part can be engaged with the waterproof seal member, the waterproof seal member can be reliably attached to the connection terminal without play in the axial and rotational directions, making this type of connection terminal The reliability of waterproofing 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. 3 is a cross-sectional perspective view of the waterproof sealing member, FIG. 4 is a cross-sectional view of the electric wire connection section housed in the housing, and FIG. 5 is a perspective view of another embodiment before assembly. 1 is a connection terminal, 1a is a core wire crimping part, 1b is a seal crimping part, 1c is a locking projection, 1e is a locking hole,
2 is an electric wire, 3 is a waterproof seal member, 4 is a cylindrical base,
4a is a locking hole, 4b is a locking protrusion, 5 is a sealing material,
6 is a 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 wire of the end of the electric wire is crimped by the first crimping part. In addition, in the waterproof structure of the connection terminal in which the second crimping part tightens the periphery of the front end of the waterproof sealing member fitted to the insulating coating part of the end of the electric wire, the waterproof sealing member is hard. It is constructed of a cylindrical base made of a material and a sealing material made of an elastic material attached to both the inner and outer surfaces of the rear part thereof, and a seal member made of an elastic material is attached to the front end of the waterproof seal member around the cylindrical base with respect to the connection terminal in the axial direction and Providing a concave or convex portion to restrict movement in the rotational direction,
A waterproof structure for a connecting terminal, characterized in that a second crimp portion of the connecting terminal that is tightened around the second crimp portion is provided with a convex portion or a concave portion that fits into a concave portion or a convex portion of the cylindrical base body.