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

Abstract

Connection terminal (10) according to the present invention includes a tab part and not smaller than four pinching plates (12) that hold an aluminum electric wire. Pinching plates (12) each include first slit (13) and contact surfaces (14). First slit (13) has a first open end located in one side of the slit, and a first tip located in the other side. The aluminum electric wire is inserted into first slit (13). Contact surfaces (14) are in contact with the aluminum electric wire that is press-fitted into first slit (13). A contact area in which contact surfaces (14) are in contact with a core wire is an area of 100% to 200% of a radial cross-sectional area of the core wire.

The invention claimed is: 
     
       1. 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 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, 
 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. 
 
     
     
       2. The connection terminal unit according to  claim 1 , wherein the contact surface includes an inclination angle from 15° to 75° relative to a direction of arranging the at least four pinching plates. 
     
     
       3. The connection terminal unit according to  claim 1 , wherein the first slit includes a temporarily holding part for temporarily holding the aluminum electric wire when the aluminum electric wire is press-fitted. 
     
     
       4. 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. 
 
     
     
       5. The connection terminal according to  claim 4 , wherein the contact surface includes an inclination angle from 15° to 75° relative to a direction of arranging the at least four pinching plates. 
     
     
       6. The connection terminal according to claim 4, wherein
 the temporarily holding part is located closer to the first open end than the contact surface   the recessed part includes two recessed parts, 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.   
     
     
       7. 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.   
     
     
       8. The connection terminal unit according to claim 7, wherein the contact surface includes an inclination angle from 15° to 75° relative to a direction of arranging the at least four pinching plates.