Fastener

1. A fastener, comprising:

a first clip member, comprising a first base portion and two first arm portions that extend upwardly from two sides of the first base portion;

a second clip member locked with the first clip member, comprising a second base portion and two second arm portions that extend upwardly from two sides of the second base portion, wherein each first arm portion is interlocked with at least one second arm portion by at least a pair of a tab and an aperture formed on adjacent sides of the first and second arm portions; and

at least one hook portion extending from a distal end of one of the first and second arm portions,

wherein the first and second clip members are arranged horizontally along two different directions, and the second base portion is positioned on the first base portion.

2. The fastener of claim 1 , wherein the first base portion comprises a first through hole formed therein, and the second base portion comprises a second through hole formed therein, wherein the second through hole at least partially overlaps with the first through hole.

3. The fastener of claim 2 , further comprising:

a fastening element positioned on the second base portion, wherein the fastening element comprises a screw hole exposed through the first and second through holes, or comprises a male screw portion extending through the first and second through holes, and

at least one protrusion formed on an inner surface of one of the first and second arm portions and extending over a part of the fastening element to keep the fastening element within a main cavity formed by the second base portion and the first and second arm portions.

4. The fastener of claim 2 , wherein the first and second through holes are substantially coaxial and the first and second through holes each have a diameter, and the diameter of the first through hole is larger than the diameter of the second through hole.

5. The fastener of claim 1 , wherein the two first arm portions extend upwardly from two opposite sides of the first base portion, and the two second arm portions extend upwardly from two opposite sides of the second base portion.

6. The fastener of claim 1 , wherein the hook portion comprises at least a groove or a ridge formed on a top surface of the hook portion.

7. The fastener of claim 1 , wherein at least one of the first and second arm portions comprises an opening.

8. The fastener of claim 1 , wherein the first base portion comprises a first through hole formed therein, and the second base portion comprises a second through hole formed therein, wherein the second through hole at least partially overlaps with the first through hole.

9. The fastener of claim 8 , further comprising:

a fastening element positioned on the second base portion, wherein the fastening element comprises a screw hole exposed through the first and second through holes, or comprises a male screw portion extending through the first and second through holes, and

at least one protrusion formed on an inner surface of one of the first and second arm portions and extending over a part of the fastening element to keep the fastening element within a main cavity formed by the second base portion and the first and second arm portions.

10. The fastener of claim 9 , wherein the at least one protrusion is formed on the inner surface of at least one of the first arm portions.

11. The fastener of claim 10 , wherein the fastening element further comprises a flange portion surrounding a lower part of a head portion, wherein the flange portion is sandwiched between the at least one protrusion and the second base portion.

12. The fastener of claim 9 , wherein the fastening element further comprises a flange portion surrounding a lower part of a head portion, wherein the flange portion is sandwiched between the at least one protrusion and the second base portion.

13. The fastener of claim 9 , wherein the at least one protrusion is partially cut out from the one of the first and second arm portions, and bent towards the main cavity.

14. A fastener, comprising:

a first clip member, comprising a first base portion and two first arm portions that extend upwardly from two sides of the first base portion;

a second clip member locked with the first clip member, comprising a second base portion and two second arm portions that extend upwardly from two sides of the second base portion wherein the first base portion comprises a first through hole formed therein, and the second base portion comprises a second through hole formed therein, wherein the second through hole at least partially overlaps with the first through hole;

a fastening element positioned on the second base portion, wherein the fastening element comprises a screw hole exposed through the first and second through holes, or comprises a male screw portion extending through the first and second through holes, and

at least one protrusion formed on an inner surface of one of the first and second arm portions and extending over a part of the fastening element to keep the fastening element within a main cavity formed by the second base portion and the first and second arm portions, wherein the at least one protrusion is formed on the inner surface of at least one of the first arm portions; and

at least one hook portion extending from a distal end of one of the first and second arm portions,

wherein the first and second clip members are arranged horizontally along two different directions, and the second base portion is positioned on the first base portion.

15. The fastener of claim 14 , wherein the at least one protrusion is partially cut out from the first arm portion, and bent towards the main cavity.

16. The fastener of claim 14 , wherein the fastening element further comprises a flange portion surrounding a lower part of a head portion, wherein the flange portion is sandwiched between the at least one protrusion and the second base portion.

17. The fastener of claim 14 , wherein the at least one protrusion is partially cut out from the one of the first and second arm portions, and bent towards the main cavity.

18. A fastener, comprising:

a first clip member, comprising a first base portion and two first arm portions that extend upwardly from two sides of the first base portion;

a second clip member locked with the first clip member, comprising a second base portion and two second arm portions that extend upwardly from two sides of the second base portion wherein the first base portion comprises a first through hole formed therein, and the second base portion comprises a second through hole formed therein, wherein the second through hole at least partially overlaps with the first through hole;

a fastening element positioned on the second base portion, wherein the fastening element comprises a screw hole exposed through the first and second through holes, or comprises a male screw portion extending through the first and second through holes, and

at least one protrusion formed on an inner surface of one of the first and second arm portions and extending over a part of the fastening element to keep the fastening element within a main cavity formed by the second base portion and the first and second arm portions, wherein the fastening element further comprises a flange portion surrounding a lower part of a head portion, wherein the flange portion is sandwiched between the at least one protrusion and the second base portion; and

at least one hook portion extending from a distal end of one of the first and second arm portions,

wherein the first and second clip members are arranged horizontally along two different directions, and the second base portion is positioned on the first base portion.

19. The fastener of claim 18 , wherein the at least one protrusion is partially cut out from the one of the first and second arm portions, and bent towards the main cavity.