Flat earth terminal and method of surface-mounting same
AssigneeKyoshin Kogyo Co., Ltd.
InventorsYoshikazu Kitajima, Toshihiro Hatakeyama
Life of this patent
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Abstract
A flat earth terminal in the shape of a flat plate includes a main part with a screw insertion hole and a leg-like terminal part continuously extending from an end of the main part. A recess is formed on a mounting side of the flat earth terminal intended to be located on a printed circuit board, in a proximal portion of the terminal part continuously extending from the main part, to separate a distal portion of the terminal part from the main part. By this, solder is prevented from flowing from the terminal part to the main part, with certainty, so that a stable electric connection between the main part and the printed circuit board is ensured.
Claims11
A flat earth terminal in the shape of a flat plate, comprising:
- a main part;
- a screw insertion hole passing through the main part;
- a leg-like terminal part continuously extending from an end of the main part and to be connected to a printed circuit board, an entire portion of the leg-like terminal being substantially flat and level with the main part;
- and
- a recess formed on a mounting side of the flat earth terminal intended to be located on a printed circuit board, in a proximal portion of the terminal part continuously extending from the main part, to separate a distal portion of the terminal part from the main part.
A method of surface-mounting a flat earth terminal onto a circuit board, comprising:
- providing the flat earth terminal having a shape of a flat plate, the flat earth terminal including,
- a main part,
- a screw insertion hole passing through the main part,
- a leg-like terminal part continuously extending from an end of the main part and to be connected to the printed circuit board, an entire portion of the leg-like terminal being substantially flat and level with the main part, and
- a recess formed on a mounting side of the flat earth terminal intended to be located on a printed circuit board, in a proximal portion of the terminal part continuously extending from the main part, to separate a distal portion of the terminal part from the main part;
- screen-printing a solder resist on the printed circuit board with a resin ink of low solder wettability, in a region in which the flat earth terminal is to be surface-mounted, at least at a location intended to correspond to the recess formed in the flat earth terminal;
- and
- mounting the flat earth terminal onto the printed circuit board.
A flat earth terminal in the shape of a flat plate, comprising:
- a main part,
- a screw insertion hole passing through the main part,
- a plurality of leg-like terminal parts continuously extending in a longitudinal direction from an end of the main part and to be connected to a printed circuit board, each of said leg-like terminal parts including a distal portion spaced from said main part and a proximal portion between said distal portion and said main part, and the an entire portion of leg-like terminal being substantially flat and level with the main part, and
- a transverse groove formed across a mounting side of each of the flat earth terminal parts in the proximal portion of the terminal parts so as to substantially prevent a solder applied to the distal portion from flowing in the longitudinal direction from the distal portion onto the main part.
A method of surface mounting a flat plate earth terminal to a printed circuit board, where the flat plate earth terminal comprises:
- a main part,
- a screw insertion hole passing through the main part, and
- a plurality of leg-like terminal parts continuously extending in a longitudinal direction from an end of the main part, each of said leg-like terminal parts including a distal portion spaced from said main part and a proximal portion between said distal portion and said main part,
- the method comprising:
- forming each of the plurality of leg-like terminal parts to be connected to a printed circuit board, an entire portion of said each of the plurality of leg-like terminal parts being substantially flat and level with the main part;
- forming a transverse groove across a mounting side of each of the flat earth terminal parts in the proximal portion of the terminal parts;
- providing a resin ink of low solder wettability;
- screen-printing a solder resist on the printed circuit board with the resin ink;
- and
- mounting the flat plate earth terminal on the printed circuit board with the recesses overlying the screen-printed solder resist.
Dependencies are inferred from the claim text.