1. A welding set of a metal member including a permanent magnet member that makes resistance welding of one metal member including a permanent magnet member and the other metal member of a work consisting of both of said metal members, the welding set being characterized by comprising:
a work retaining part that retains said work;
a pressure device that is located above said work retaining part with a work-providing space interposed;
a first welding electrode that is mounted on the moving part side of said pressure device, and is made to abut on said work;
a second welding electrode made to abut on said work; and
a welding transformer supplying a welding current to both of said welding electrodes;
wherein both of said welding electrodes are located on one end side of said work with respect to said one metal member and said other metal member respectively; as well as are located so that there is no said permanent magnet member between respective abutment terminals of said one metal member and said other metal member.
2. The welding set of a metal member including a permanent magnet member according to claim 1, characterized in that said work retaining part and said work are electrically insulated from each other through an insulating member.
3. The welding set of a metal member including a permanent magnet member according to claim 1, characterized in that a plurality of said welding transformers are electrically connected in parallel, and plural weld areas are simultaneously welded with the use of said first welding electrode and said second welding electrode that are connected to each of said welding transformers.
4. The welding set of a metal member including a permanent magnet member according to claim 1, characterized in that at least either of said first welding electrode or said second welding electrode is arranged to oscillate by being in contact with the work.
5. The welding set of a metal member including a permanent magnet member according to claim 1, characterized in that there is provided an electric circuit making it possible to set a current value and a duration thereof, and a polarity of said welding current.
6. The welding set of a metal member including a permanent magnet member according to claim 5, characterized in that said electric circuit comprises: a capacitor in which an electric power is charged and stored; a switching circuit that converts a discharge current from said capacitor into AC to supply it to said welding transformer; a control circuit that controls said switching circuit; an input section that sets a set value for obtaining a predetermined current waveform to said control circuit; and a current sensor that monitors an output current from said switching circuit; and a welding current is controlled while comparing said output current and said set value.
7. The welding set of a metal member including a permanent magnet member according to claim 1, characterized in that said work is a rotor of an electric rotating machine.
8. A welding method using a welding set of a metal member including a permanent magnet member that makes resistance welding of one metal member including a permanent magnet member and the other metal member of a work consisting of both of said metal members, the welding set comprising: a work retaining part that retains said work; a pressure device located above said work retaining part with a work-providing space interposed; a first welding electrode that is mounted on the moving part side of said pressure device, and is made to abut on said work; a second welding electrode made to abut on said work; and a welding transformer supplying a welding current to both of said welding electrodes;
the welding method being characterized in that in which both of said welding electrodes are located on one end side of said work with respect to said one metal member and said other metal member respectively, and located so that there is no said permanent magnet member between respective abutment terminals of said one metal member and said other metal member; and
said welding current is supplied to said work from both of said welding electrodes to make resistance welding.
9. A welding set of a metal member including a permanent magnet member that makes resistance welding of one metal member including a permanent magnet member and the other metal member of a work consisting of both of said metal members, said work being a rotor of an electric rotating machine, said rotor being characterized by comprising:
a pair of pole cores which plural pawl-shaped magnetic poles that are formed on respective outer circumferential sides are engaged with each other to be disposed in an axial opposition;
a shaft that goes through said pole cores;
a plurality of permanent magnet members that are disposed between said pawl-shaped magnetic poles adjacent in a circumferential direction of said pole cores;
a field coil that is mounted in an internal part of said pole cores to excite a pair of said pole cores in different magnetic poles; and
a plate member mounted on an axial end face of said pole cores;
wherein a welding current is supplied between said plate member and said pole core side from a first welding electrode and a second welding electrode that are located on the same axial end side of said rotor.
10. The welding set of a metal member including a permanent magnet member according to claim 9, characterized in that said first welding electrode out of two welding electrodes is brought in electrical contact with said plate member and said second welding electrode is brought in electrical contact with said pole core to make resistance welding.
11. The welding set of a metal member including a permanent magnet member according to claim 9, characterized in that there is provided a notch or a through hole in a face opposite to said pole core of said plate member in order to bring said second welding electrode in contact with said pole core.
12. The welding set of a metal member including a permanent magnet member according to claim 9, characterized in that said first welding electrode out of two welding electrodes is brought in electrical contact with said plate member, and said second welding electrode is brought in electrical contact with said shaft to make resistance welding.
13. An electric rotating machine comprising a rotor that includes: a pair of pole cores which plural pawl-shaped magnetic poles that are formed on respective outer circumferential sides are engaged with each other to be disposed in an axial opposition; a shaft that goes through said pole cores; a plurality of permanent magnet members that are disposed between said pawl-shaped magnetic poles adjacent in a circumferential direction of said pole cores; a field coil that is mounted in an internal part of said pole cores to excite a pair of said pole cores in different magnetic poles; and a plate member mounted on an axial end face of said pole cores, and a stator located at the peripheral portion of said rotor with a subtle gap therebetween,
the electric rotating machine being characterized in that the rotor is employed, said rotor being formed by resistance welding of said plate member to said pole core in which a welding current is supplied between said plate member and said pole core from two welding electrodes that are located on the same one axial end side of said rotor.
14. A welding set of a metal member including a permanent magnet member that makes resistance welding of one metal member including a permanent magnet member and the other metal member of a work consisting of both of said metal members, the welding set being characterized by being equipped with an AC generator that generates AC as a welding current, and in that the welding set supplies an AC welding current to a work through a first welding electrode and a second welding electrode from said AC generator.
15. The welding set of a metal member including a permanent magnet member according to claim 14, characterized in that said welding current is in a current waveform in which a polarity of half cycle immediately after the start of energization and a polarity of half cycle just before the end of energization are different.
16. The welding set of a metal member including a permanent magnet member according to claim 15, wherein said welding current is in a waveform in which amplitudes attenuate with the passage of time.
17. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that said welding current is in a waveform in which amplitudes rise with the passage of time.
18. The welding set of a metal member including a permanent magnet member according to claim 17, characterized in that said welding current is in a waveform in which a polarity of half cycle immediately after the start of energization and a polarity of the first half cycle of an amplitude coming to be the maximum are different.
19. The welding set of a metal member including a permanent magnet member according to claim 18, characterized in that the number of waves of half cycle, in which said amplitude of said welding current is maximal, is odd number.
20. The welding set of a metal member including a permanent magnet member according to claim 18, characterized in that an amplitude of the second half cycle, being counted immediately after the start of energization of said welding current, is the maximum.
21. The welding set of a metal member including a permanent magnet member according to claim 20, characterized in that an amplitude of half cycle immediately after the start of enrgization of said welding current is in a range of \u2153 to \u2154 said amplitude of the second half cycle, being counted immediately after the start of energization.
22. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that said welding current is in a waveform in which amplitudes rise temporarily, and thereafter attenuate with the passage of time.
23. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that said welding current is in a waveform in which at least a peak current value of half cycle of an amplitude being maximal continues for a predetermined time period.
24. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that said work is formed with a projection and a groove around said projection in a welded face of either said one metal member or said other metal member.
25. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that both of said welding electrodes are located on one end side of said work with respect to said one metal member and said other metal member respectively; as well as located so that there is no said permanent magnet member between respective abutment terminals of said one metal member and said other metal member.
26. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that plural weld areas are simultaneously welded with the use of said first welding electrode and said second welding electrode.
27. The welding set of a metal member including a permanent magnet member according to claim 15, characterized in that said work is a rotor of an electric rotating machine.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An external extension for holding a portable computer, comprising:
a base, the base comprising a first area, a second area, and a third area;
a keyboard module disposed on the first area of the base;
a pin set disposed on the third area of the base and electrically connected to the keyboard module for connecting to the portable computer so as to transmit a signal generated by the keyboard module to the portable computer; and
a protecting cover disposed on the first area of the base in a pivotable manner and adjacent to the second area, the protecting cover covering the keyboard module when the protecting cover pivots relative to the base at a first position, and the protecting cover being for holding the portable computer when the protecting cover pivots relative to the base at a second position and a side of the protecting cover contacts against a lateral side of the second area so that a visual angle is formed between the portable computer and the keyboard module.
2. The external extension of claim 1, wherein the third area is disposed between the first are and the second area, and the third area is a sunken structure for placing the portable computer.
3. The external extension of claim 1, wherein an arc structure is formed on a lateral side of the protecting cover, and a curvature of the arc structure is substantially equal to a curvature of a casing of the portable computer.
4. The external extension of claim 1, wherein the visual angle is substantially 105 degrees.
5. The external extension of claim 1, further comprising:
a speaker module disposed on the second area of the base and electrically connected to the pin set.
6. The external extension of claim 1, further comprising:
a holding component, an end of the holding component being disposed on the second area of the base in a pivotable manner, at least one fixing portion being formed on the protecting cover for fixing the other end of the holding component so as to constrain rotational movement of the protecting cover relative to the base when the protecting cove pivots relative to the base to the visual angle.
7. The external extension of claim 6, wherein the fixing portion is a slot.
8. The external extension of claim 1, wherein the pin set is a pogo pin.
9. The external extension of claim 1, further comprising:
a supporting component, an end of the supporting component being disposed on the protecting cover in a pivotable manner, a sliding slot being formed on the second area of the base, at least one contacting portion being disposed inside the sliding slot, and the other end of the supporting component being disposed inside the sliding slot of the second area in a slidable manner for contacting against the contacting portion of the sliding slot so as to constrain rotational movement of the protecting cover relative to the base when the protecting cover pivots relative to the base.
10. The external extension of claim 1 further comprising:
a magnetic component disposed on the base for attracting the portable computer so as to combine the external extension with the portable computer.
11. A computer system comprising:
a portable computer; and
an external extension for holding the portable computer, the external extension comprising:
a base, the base comprising a first area, a second area, and a third area;
a keyboard module disposed on the first area of the base;
a pin set disposed on the third area of the base and electrically connected to the keyboard module for connecting to the portable computer so as to transmit a signal generated by the keyboard module to the portable computer; and
a protecting cover disposed on the first area of the base in a pivotable manner and adjacent to the second area, the protecting cover covering the keyboard module when the protecting cover pivots relative to the base at a first position, and the protecting cover being for holding the portable computer when the protecting cover pivots relative to the base at a second position and a side of the protecting cover contacts against a lateral side of the second area so that a visual angle is formed between the portable computer and the keyboard module.
12. The computer system of claim 11, wherein the third area is disposed between the first are and the second area, and the third area is a sunken structure for placing the portable computer.
13. The computer system of claim 11, wherein an arc structure is formed on a lateral side of the protecting cover, and a curvature of the arc structure is substantially equal to a curvature of a casing of the portable computer.
14. The computer system of claim 11, wherein the visual angle is substantially 105 degrees.
15. The computer system of claim 11, wherein the external extension further comprises:
a speaker module disposed on the second area of the base and electrically connected to the pin set.
16. The computer system of claim 11, wherein the external extension further comprises:
a holding component, an end of the holding component being disposed on the second area of the base in a pivotable manner, at least one fixing portion being formed on the protecting cover for fixing the other end of the holding component so as to constrain rotational movement of the protecting cover relative to the base when the protecting cover pivots relative to the base to the visual angle.
17. The computer system of claim 16, wherein the fixing portion is a slot.
18. The computer system of claim 11, wherein a sliding slot is formed on the second area of the base, at least one contacting portion is disposed inside the sliding slot, the external extension further comprises a supporting component, an end of the supporting component is disposed on the protecting cover in a pivotable manner, and the other end of the supporting component is disposed inside the sliding slot of the second area in a slidable manner for contacting against the contacting portion of the sliding slot so as to constrain rotational movement of the protecting cover relative to the base when the protecting cover pivots relative to the base.
19. The computer system of claim 11, wherein the external extension further comprises a magnetic component disposed on the base for attracting the portable computer so as to combine the external extension with the portable computer.
20. The computer system of claim 11, wherein the pin set is a pogo pin.