Electrical connecting device with spring connection element and compact actuator and multi-pole plug connector comprising a plurality of said spring contacts

1. An electrical connecting device comprising:

an electrical insulating body with at least one pair of longitudinal parallel seats adapted to house, respectively,

a connecting element with a terminal having a spring fixed thereto, and

an actuator pin having a cam profile oriented towards said spring of the terminal to cause the opening and closure of the terminal by sliding into the corresponding seat,

said spring being a ring-shaped spring having a curved elbow-shaped lower portion which acts as a real spring,

a back portion, which is rear with respect to said terminal, and is continued with said curved elbow-shaped lower portion, said back portion being in a form of a leg ascending from said curved lower portion, said back portion being engageable with a projecting portion of said cam profile of the actuator pin, and

an upper portion with a slot or aperture adapted to receive at least one electric conductor,

wherein said cam profile of the actuator pin oriented towards said spring has at least one indentation and a remaining ribbed portion, and

wherein said back ascending portion in a form of a leg of the spring has a corresponding groove which houses said at least one ribbed portion of the actuator pin in the maximum extension status of the spring, when the terminal is closed and empty without a conductor.

2. The electrical connecting device according to claim 1 , wherein both the sides of the actuator pin have tapers delimited by an intermediate ribbed portion and wherein said groove provided on said back ascending portion in a form of a leg of the spring is a window able to house said intermediate ribbed portion of the actuator pin.

3. The electrical connecting device according to claim 2 , wherein an intermediate ribbed portion is centrally provided to the actuator pin.

4. The electrical connecting device according to claim 1 , wherein said actuator pin has a width not exceeding that of said connecting element with a spring terminal.

5. The electrical connecting device according to claim 1 , wherein said actuator pin has a side seat for insertion of a tool tip.

6. The electrical connecting device according to claim 1 , wherein said actuator pin has a longitudinal aperture oriented along the direction of said spring, configured to allow the insertion of a tester device probe for electrical measurements.

7. The electrical connecting device according to claim 1 , wherein said electrical insulating body comprises a base and a cover.

8. The electrical connecting device according to claim 1 , wherein said at least one conductor is a flexible or rigid one.

9. A multipole electrical plug connector incorporating a plurality of electric connecting elements having a spring terminal and actuator pins inserted in a rollaway fashion inside respective housing seats of the insulating body of the plug connector having the features according to claim 1 .