Linear compressor

1. A linear compressor comprising:

a cylinder block forming a compressing chamber;

a piston reciprocatably provided in the compressing chamber;

a reciprocating member connected to the piston to reciprocate with the piston as a single body;

a driver driving the reciprocating member to reciprocate; and

a resonance spring comprising a first connecting part formed with a plurality of first connecting holes to permit connection to the cylinder block, a second connecting part that is provided inside of the first connecting part and formed with a second connecting hole to permit connection to the reciprocating member to reciprocate with the reciprocating member as a single body, and a plurality of arms spaced apart from one another between the first connecting part and the second connecting part,

each of the arms comprising a first end connected to the first connecting part to be positioned between the plurality of first connecting holes, a second end connected to the second connecting part to be positioned in the vicinity of the second connecting part, and a plurality of arm bodies of a spiral shape to connect the first end and the second end;

wherein a width of the first connecting part is in a range of approximately one half a width of the arm body and three times the width of the arm body, and

wherein the width of the first connecting pad is increased from the first end in a direction of forming of each of the arms, to a portion adjacent to an inward groove.

2. The linear compressor according to claim 1 , wherein the distance between the first connecting part and each of the arm bodies is in a range of approximately one half the width of the arm body and three times the width of the arm body.

3. The linear compressor according to claim 2 , wherein the width of the first connecting part is increased from the first end of the arm along a direction of the arm body.

4. The linear compressor according to claim 3 , wherein a first groove is inwardly formed on an outer circumference of the first connecting part in a vicinity of the first end of each of the arms.

5. The linear compressor according to claim 4 , wherein a second groove is outwardly formed on an inner circumference of the first connecting part in a vicinity of the first end.

6. The linear compressor according to claim 1 , wherein the number of the arms is identical with the number of the first connecting holes.

7. The linear compressor according to claim 6 , wherein the arms and the first connecting holes are provided three in number at equal intervals, respectively.

8. The linear compressor according to claim 2 , wherein the number of the arms is identical with the number of the first connecting holes.

9. The linear compressor according to claim 8 , wherein the arms and the first connecting holes are provided three in number at equal intervals, respectively.

10. The linear compressor according to claim 4 , wherein the number of the arms is identical with the number of the first connecting holes.

11. The linear compressor according to claim 10 , wherein the arms and the first connecting holes are provided three in number at equal intervals, respectively.

12. The linear compressor according to claim 1 , wherein the resonance spring is of a disk shape.

13. The linear compressor according to claim 1 , wherein the driver comprises an outer core connected to the cylinder block, an inner core provided inside of the outer core and spaced apart from the outer core and a magnet provided between the outer core and the inner core to reciprocate by a magnetic field generated between the outer core and the inner core, and

the magnet reciprocates with the reciprocating member as a single body and the outer core is connected with the first connecting hole of the first connecting part.