Driving mechanism
A driving mechanism is provided, including a base, a movable module, and a driving assembly. The movable module has a movable member and a connecting member connected to the movable member. The driving assembly is connected to the base and the connecting member. The driving assembly has a driving element that generates a driving force to the connecting member and the movable member, so that the movable module moves relative to the base.
1. A driving mechanism, comprising:
a base;
a movable module, having a movable member and a connecting member connected to the movable member; and
a driving assembly, connected to the base and the connecting member, wherein the driving assembly has a driving element that generates a driving force to the connecting member and the movable member, so that the movable module moves relative to the base,
wherein the driving assembly further has a hollow resilient member disposed on the connecting member, a frictional element disposed in the resilient member, and a transmission rod connected to the base and the frictional element, wherein the driving element is disposed on the transmission rod and generates the driving force to the connecting member and the movable member via the transmission rod.
2. The driving mechanism as claimed in claim 1 , further comprising a first guiding pin and a second guiding pin, wherein the base has a first hole, a second hole, and a third hole, the first and second guiding pins are respectively joined in the first and second holes, and the transmission rod extends through the third hole.
3. The driving mechanism as claimed in claim 2 , wherein the first guiding pin is joined to the first hole in an interference-fit manner.
4. The driving mechanism as claimed in claim 3 , wherein the second guiding pin is joined to the second hole in an interference-fit manner.
5. The driving mechanism as claimed in claim 2 , wherein the movable member has a fourth hole and a fifth hole, the first and second guiding pins are movably received in the fourth and fifth holes.
6. The driving mechanism as claimed in claim 5 , wherein the fourth hole has a longitudinal structure.
7. The driving mechanism as claimed in claim 6 , wherein the first guiding pin is joined to the fourth hole in a clearance-fit manner.
8. The driving mechanism as claimed in claim 7 , wherein the second guiding pin is joined to the fifth hole in a transition-fit manner.
9. The driving mechanism as claimed in claim 2 , wherein the connecting member has a through hole, the frictional element is disposed in the through hole, and the transmission rod is connected with the frictional element in a transition-fit manner.
10. The driving mechanism as claimed in claim 9 , wherein the driving assembly further has a buffer member disposed in the third hole, and the transmission rod extends through the buffer member.
11. The driving mechanism as claimed in claim 10 , wherein the transmission rod is joined to the buffer member in a transition-fit manner.
12. The driving mechanism as claimed in claim 11 , wherein friction between the transmission rod and the buffer member is greater than friction between the transmission rod and the frictional element.
13. The driving mechanism as claimed in claim 9 , wherein the movable member has a fourth hole and a fifth hole, and the first and second guiding pins are movably received in the fourth and fifth holes.
14. The driving mechanism as claimed in claim 13 , wherein the second guiding pin is joined to the fifth hole in a transition-fit manner, and friction between the second guiding pin and the fifth hole is less than friction between the transmission rod and the frictional element.
15. The driving mechanism as claimed in claim 1 , wherein the frictional element has a C-shaped cross-section.
16. The driving mechanism as claimed in claim 1 , wherein the driving element comprises a piezoelectric element that generates a vibration signal to transfer the driving force through the transmission rod to the connecting member and the movable member.
17. The driving mechanism as claimed in claim 16 , further comprising a weight block connected to the driving element, wherein the weight block and the transmission rod are located on opposite sides of the driving element.
18. The driving mechanism as claimed in claim 1 , wherein the movable member has a cavity, and the connecting member has a protrusion joined in the cavity.
19. The driving mechanism as claimed in claim 1 , wherein the movable member and the connecting member adhere to each other.