Connection terminal and method for manufacturing connection terminal

1. A connection terminal comprising:

a terminal connection portion to be connected with a partner terminal;

a wire connection portion connected with a wire;

a neck portion connecting the terminal connection portion and the wire connection portion and having a bottom wall and a pair of side walls installed upright from both sides of the bottom wall, the pair of side walls having parallel wall portions equally spaced from each other and inclined wall portions inclined in directions that gradually make the interval narrower from the terminal connection portion toward the wire connection portion; and

a resin covering portion covering a connection portion of the wire connection portion and the wire and molded by resin injection molding by use of a die,

wherein a resin blocking piece of the die placed in between the parallel wall portions of the pair of side walls blocks a resin poured into the die in molding of the resin covering portion, and

wherein the pair of side walls are formed continuously from walls of the terminal connection portion to walls of the wire connection portion.

2. The connection terminal according to claim 1 , wherein a length of the parallel wall portions is larger than a width of the resin blocking piece.

3. A method of manufacturing a connection terminal comprising:

producing a terminal connection portion to be connected with a partner terminal, a wire connection portion connected with a wire, and a neck portion connecting the terminal connection portion and the wire connection portion and having a bottom wall and a pair of side walls installed upright from both sides of the bottom wall;

connecting the wire connection portion and the wire such that the pair of side walls of the neck portion have parallel wall portions equally spaced from each other and inclined wall portions inclined in directions that gradually make the interval narrower from the terminal connection portion toward the wire connection portion, the pair of side walls extending continuously from walls of the terminal connection portion to walls of the wire connection portion;

covering a connection portion of the wire connection portion and the wire with a die;

placing a resin blocking piece of the die in between the parallel wall portions of the pair of side walls;

pouring a resin into the die;

blocking the poured resin with the resin blocking piece; and

molding a resin covering portion by resin injection molding.

4. The method of manufacturing a connection terminal according to claim 3 , wherein when the resin covering portion is molded, the wire and the neck portion are each held in proper positions by holding portions of the die.

5. The method of manufacturing a connection terminal according to claim 3 , wherein when the wire connection portion and the wire are connected, the parallel wall portions of the neck portion are corrected to a proper position by a neck portion correction portion of the die.

6. The method of manufacturing a connection terminal according to claim 3 , wherein a length of the parallel wall portions is formed larger than a width of the resin blocking piece.

7. A method of manufacturing a connection terminal comprising:

producing a terminal connection portion to be connected with a partner terminal, a wire connection portion connected with a wire, and a neck portion connecting the terminal connection portion and the wire connection portion and having a bottom wall and a pair of side walls installed upright from both sides of the bottom wall;

connecting the wire connection portion and the wire such that the pair of side walls of the neck portion have parallel wall portions equally spaced from each other;

covering a connection portion of the wire connection portion and the wire with a die;

placing a resin blocking piece of the die in between the parallel wall portions of the pair of side walls;

pouring a resin into the die;

blocking the poured resin with the resin blocking piece; and

molding a resin covering portion by resin injection molding,

wherein when the wire connection portion and the wire are connected, the parallel wall portions of the neck portion are corrected to a proper position by a neck portion correction portion of the die.