Female connector with improved contact area
View Patent ↗A terminal includes a terminal connection part into which a tab is inserted, a leaf spring portion arranged in the terminal connection part and deflected by the tab to be inserted, and a tab clamping projection wall extending in a tab insertion direction at a position spaced apart from the leaf spring portion and clamps the tab between itself and the leaf spring portion. The leaf spring portion has a spring side projection protruding toward the tab clamping projection wall. The tab clamping projection wall has a projecting portion with a width smaller than that of the tab clamping projection wall and which protrudes toward the leaf spring portion and extends in the tab insertion direction. The projecting portion is formed in a curved shape that is spaced from the tab at a position of the spring side projection and is close to the tab at front and rear positions.
1. A terminal comprising:
a terminal connection part into which a tab of a mating terminal is inserted;
a leaf spring portion that is arranged in the terminal connection part and is deflected by being pressed by the tab to be inserted; and
a tab clamping projection wall that extends in a tab insertion direction at a position spaced apart from the leaf spring portion and clamps the inserted tab between itself and the leaf spring portion, wherein
the leaf spring portion is provided with a spring side projection protruding toward the tab clamping projection wall,
the tab clamping projection wall is provided with a projecting portion whose dimension perpendicular to the tab insertion direction is smaller than that of the tab clamping projection wall and which protrudes toward the leaf spring portion and extends in the tab insertion direction, and
the projecting portion is formed in a curved shape that is spaced from the tab at a position of the spring side projection and is close to the tab at front and rear positions in the tab insertion direction relative to the position of the spring side projection.
2. The terminal according to claim 1 , wherein
the tab clamping projection wall is formed in a curved shape that is spaced from the tab at a position of the spring side projection and is close to the tab at front and rear positions in the tab insertion direction relative to the position of the spring side projection, and
the projecting portion is formed in a curved shape conforming to the tab clamping projection wall.
3. The terminal according to claim 2 , wherein the projecting portion has a same amount of projection at any position in the tab insertion direction.
4. The terminal according to claim 2 , wherein the curved shape of the projecting portion is provided with a pair of projections at a front position and a rear position in the tab insertion direction relative to a position of the spring side projection.
5. The terminal according to claim 2 , wherein a width dimension of the projecting portion perpendicular to the tab insertion direction is smaller than that of the tab clamping projection wall.
6. The terminal according to claim 1 , wherein
the projecting portion is an arc-shaped projection in cross-section perpendicular to the tab insertion direction.
7. The terminal according to claim 1 , wherein
the terminal connection part includes a bottom wall, a pair of side walls, and a top wall,
the bottom wall, the pair of side walls, and the top wall constitute a square tubular shape,
an inside of the square tubular shape is provided with a terminal insertion chamber into which the tab of the terminal is inserted, and
the terminal insertion chamber receives the leaf spring portion.
8. The terminal according to claim 7 , wherein
the bottom wall comprises an auxiliary spring portion having a tip portion,
the tip portion of the auxiliary spring portion is arranged in a deflection region on the distal side of the leaf spring portion such that a deflection of the leaf spring portion causes the auxiliary spring portion to deflect, thereby increasing a spring force of the leaf spring portion.
9. The terminal according to claim 7 , wherein
the top wall comprises two plates superimposed on each other,
a lower plate of the two plates of the top wall is provided with the tab clamping projection wall protruding into the terminal insertion chamber,
the tab clamping projection wall is located at a position spaced apart from the leaf spring portion.
10. The terminal according to claim 7 , wherein
the tab of the mating terminal is inserted into the terminal insertion chamber of the terminal such that the tab makes contact with the leaf spring portion and presses the leaf spring portion such that the leaf spring portion is deflected,
the tab is pressed toward the projecting portion of the tab clamping projection wall by an elastic restoring force from the leaf spring portion,
the deflection of the leaf spring portion allows the tab to be further inserted into the terminal insertion chamber such that the tab makes contact at three points including the spring side projection of the leaf spring portion and a pair of projections of the curved shape of the projecting portion.