Slider mechanisms for opening and closing portable terminals

1. A slider mechanism comprising:

a first slider member having a first pair of rotational supports;

a second slider member slidably engaged with the first slider member and having a second pair of corresponding rotational supports;

a pair of springs, each spring having a zigzag configuration, each spring including:

a first curved end portion defining an opening configured to receive one of the rotational supports for rotatably coupling the first curved end portion to of one of the slider members;

a second curved end portion defining an opening configured to receive the other one of the corresponding rotational supports for rotatably coupling the second curved end portion to the other of the slider members;

each spring further comprising: a first zigzag portion;

at least two second zigzag portions each of which extends from a corresponding one of the first and second curved end portions to the first zigzag portion, such that the first zigzag portion is disposed generally between the second zigzag portions, each said second zigzag portion having at least one spring characteristic different from the first zigzag portion; and

the at least one zigzag spring including a plurality of curved portions alternating in curvature along the at least one zigzag spring from the first curved end portion towards the second curved end portion;

each of the first pair of rotational supports being a first rivet having a groove, and rotatably coupling the first curved end portion to the first slider member, the first curved end portion being rotatably disposed about the first rivet and supported within the groove of the first rivet; and

each of the second corresponding pair of rotational supports being a second rivet having a groove, and rotatably coupling the second curved end portion to the second slider member, the second curved end portion being rotatably disposed generally about the second rivet and supported within the groove of the second rivet;

whereby each of the springs is compressed and restored while the first and second members slide relative to each other.

2. The slider mechanism as claimed in claim 1 , wherein the pair of springs are disposed so as not to interfere with each other.

3. The slider mechanism as claimed in claim 1 , wherein the first zigzag portion has a spring coefficient different from that of the second zigzag portions.

4. The slider mechanism as claimed in claim 1 , wherein the first zigzag portion has a zigzag pitch different from that of the second zigzag portions.

5. The slider mechanism as claimed in claim 1 , wherein each spring has an ‘M’-shape in general.

6. The slider mechanism as claimed in claim 1 , wherein the first zigzag portion has a cross-sectional shape different from that of the second zigzag portions.

7. The slider mechanism as claimed in claim 1 , wherein each spring has a circular, oval or rectangular cross-section.

8. An electronic device comprising a first body, a second body, and the slider mechanism as claimed in claim 1 , wherein the first slider member is fixed to the first body and the second slider member is fixed to the second body, such that the second body is capable of sliding on the first body.

9. The electronic device as claimed in claim 8 , wherein the first slider member is formed integrally with the first body of the electronic device.

10. The electronic device as claimed in claim 8 , wherein the second slider member is formed integrally with the second body of the electronic device.

11. The slider mechanism as claimed in claim 1 , wherein the first of each spring is about a center of the spring with the second zigzag portions at both sides thereof.

12. The slider mechanism as claimed in claim 1 , wherein the first zigzag portion has larger pitches than the second zigzag portions.

13. The slider mechanism as claimed in claim 1 , wherein the first and second zigzag portions cooperatively define an M-shape in general.

14. A portable communications terminal comprising a main body and a slider body, the slider body being slidably opened and closed with respect to the main body, and the slider mechanism as claimed in claim 1 , wherein

the first slider member is fixed to the main body;

the second slider member is fixed to the slider body, the second slider member being linear-slidably engaged with the first slider member; and

each spring is disposed between the first and second slider members.

15. The slider mechanism of claim 1 , wherein the first zigzag portion is configured with a generally M-shape.

16. The slider mechanism of claim 1 , wherein the at least one spring characteristic includes at least one or more of a spring coefficient, a zigzag pitch, a bending angle, and/or a cross-sectional shape.

17. The slider mechanism of claim 1 , wherein the first zigzag portion includes at least one or more of:

a spring coefficient different from that of the second zigzag portions;

a zigzag pitch different from that of the second zigzag portions; and/or

larger zigzag pitches than the second zigzag portions; and/or

a cross-sectional shape different from that of the second zigzag portions.

18. A portable communications terminal comprising the slider mechanism of claim 1 .