Lens actuating module

Abstract

A lens actuating module for realizing focus adjustment and optical zooming. The lens actuating module includes a rod which is disposed on one side of a lens barrel on which at least one lens is mounted, and has an axis direction corresponding to an optical axis direction of the lens barrel, a driving force transmission member which has a conjoining recess to be conjoined with an outside surface of the rod and has magnetism so as to be conjoined with the outside surface of the rod due to a magnetic force, and a piezoelectric actuator which is disposed on one side of the driving force transmission member in the optical axis direction to provide an axis direction driving force to the rod via the driving force transmission member.

What is claimed is: 
     
         1 . A lens actuating module comprising:
 a rod which is disposed on one side of a lens barrel on which at least one lens is mounted, and has an axis direction corresponding to an optical axis direction of the lens barrel;   a driving force transmission member which has a conjoining recess to be conjoined with an outside surface of the rod and has magnetism so as to be conjoined with the outside surface of the rod due to a magnetic force; and   a piezoelectric actuator which is disposed on one side of the driving force transmission member in the optical axis direction to provide an axis direction driving force to the rod via the driving force transmission member.   
     
     
         2 . The lens actuating module according to  claim 1 , wherein the driving force transmission member includes a magnet which is integrally formed with the conjoining recess and is formed in a horizontal magnetization pattern or a vertical magnetization pattern, and in which magnetization polarities facing each other are opposite polarities. 
     
     
         3 . The lens actuating module according to  claim 2 , wherein the driving force transmission member further includes a magnetic material which is disposed on one side surface of the magnet opposite to the conjoining recess to increase a magnetic force. 
     
     
         4 . The lens actuating module according to  claim 1 , wherein the driving force transmission member includes a magnet in a horizontal magnetization pattern or a vertical magnetization pattern, and a guide which has the conjoining recess and is attached to one side surface of the magnet. 
     
     
         5 . The lens actuating module according to  claim 4 , wherein the guide is formed of a non-magnetic material and is attached to the one side surface of the magnet. 
     
     
         6 . The lens actuating module according to  claim 1 , wherein the driving force transmission member includes a magnet in a horizontal magnetization pattern or a vertical horizontal magnetization, a first magnetic material which is disposed on one side surface of the magnet contacting the piezoelectric actuator to increase a magnetic force, and a second magnetic material which is disposed on the other side surface of the magnet opposite to the first magnetic material to increase the magnetic force,
 wherein the first magnetic material and the second magnetic material include a first conjoining recess and a second conjoining recess, respectively, to form the conjoining recess.   
     
     
         7 . The lens actuating module according to  claim 1 , further comprising a weight which is disposed on one side of the piezoelectric actuator opposite to the driving force transmission member to support actuating of the piezoelectric actuator. 
     
     
         8 . The lens actuating module according to  claim 1 , further comprising a reinforcement layer which is disposed on at least one of the conjoining recess and the outside surface of the rod to reinforce strength and prevent oxidization between the driving force transmission member and the rod. 
     
     
         9 . The lens actuating module according to  claim 8 , wherein the reinforcement layer is formed in a coating film pattern in which one metallic material of ceramic, tungsten, titanium, chrome, and aluminum is mixed with one of a carbon compound and a nitrogenous compound.