Connection terminal, connection device, method for manufacturing the device, motor using the device, and compressor using the motor and blower using the motor

A connection terminal used for an aluminum electric wire including a core wire, and an insulating coating for covering an outer peripheral surface of the core wire, the connection terminal comprising:

• a tab part;
• and
• at least four pinching platesfor holding the aluminum electric wire, wherein each of the pinching plates includes include
• a first slit having a first open end located in one side and having a first tip located in an other side, the aluminum electric wire being press-fitted into the first slit, and
• a contact surface in contact with the aluminum electric wire press-fitted into the first slit,
• wherein a total contact area between each the contact surface of the contact surfaces at least four pinching plates and the core wire is an area of 100% to 200% of a radial cross-sectional area of the core wire, when the at least four pinching plates hold the aluminum electric wire, and the total contact area being a total area of effective contact surfaces at which the contact surface is in contact, relative to the radial cross-sectional area of the core wire,
• wherein the first slit includes a temporarily holding part for temporarily holding the aluminum electric wire when the aluminum electric wire is press-fitted, and
• the temporarily holding part includes a recessed part that is formed of taper shaped parts in the first slit.

A connection terminal unit comprising:

• a connection terminal;
• and
• an aluminum electric wire comprising a core wire and an insulating coating for covering an outer peripheral surface of the core wire, wherein the connection terminal comprises
• a tab part;
• and
• at least four pinching plates for holding the aluminum electric wire, wherein each of the pinching plates includes
• a first slit having a first open end located in one side and having a first tip located in an other side, the aluminum electric wire being press-fitted into the first slit, and
• a contact surface in contact with the aluminum electric wire press-fitted into the first slit, and
• wherein a total contact area between the contact surface of the at least four pinching plates and the core wire is an area of 100% to 200% of a radial cross-sectional area of the core wire,
• the total contact area being a total area of effective contact surfaces at which the contact surface is in contact, relative to the radial cross-sectional area of the core wire, and
• wherein the first slit includes a temporarily holding part for temporarily holding the aluminum electric wire when the aluminum electric wire is press-fitted,
• the temporarily holding part is located closer to the first open end than the contact surface,
• the temporarily holding part includes two recessed parts in the first slit, the two recessed parts facing each other in the first slit,
• each of the two recessed parts is formed of two taper shaped parts, and
• the taper shaped parts are configured to be located around the aluminum electric wire press-fitted into the first slit to hold the aluminum electric wire.