Lens driving apparatus with wire accommodating recess
View Patent ↗The present invention provides a lens driving apparatus including: a driving coil for driving a lens holder; and a leaf spring configured to absorb an impact on the lens holder; wherein the driving coil is electrically connected to the leaf spring, and a particularly bent portion and a recess for accommodating the bent portion are provided at a joint where the driving coil and the leaf spring are connected so as to improve the mechanical stability of the apparatus.
1. A lens driving apparatus, comprising:
a lens holder having an external surface and accommodating at least one lens;
a driving coil having two ends and securely attached to the external surface of the lens holder; and
a leaf spring having a first part and a second part and partially secured to the external surface of the lens holder, the first part and the second part electrically connect with one end and the other end of the driving coil, respectively;
wherein the one end of the driving coil has a bent portion; and
wherein a recess is formed on the external surface of the lens holder at a location corresponding to the bent portion for accommodating the bent portion, the recess is formed inward from the external surface to which the driving coil is attached.
2. The lens driving apparatus of claim 1 , wherein the leaf spring has a flat surface, the one end of the driving coil is parallel to the flat surface and extends to the leaf spring, and the bent portion is arranged at the one end parallel to the flat surface.
3. The lens driving apparatus of claim 1 , wherein the leaf spring has a flat surface, and the one end of the driving coil extends along the recess to the flat surface with the bent portion disposed between the flat surface and the driving coil.
4. The lens driving apparatus of claim 1 , wherein the one end of the driving coil has another bent portion accommodated in the recess.
5. The lens driving apparatus of claim 1 , wherein the other end of the driving coil has another bent portion and the lens holder has another recess in which the another bent portion is accommodated.
6. The lens driving apparatus of claim 1 , wherein a bending direction of the bent portion is determined by the location of the recess of the lens holder.
7. The lens driving apparatus of claim 1 , wherein the leaf spring comprises a first frame portion, a first gripping portion, a second frame portion and a second gripping portion, and the first gripping portion and the second gripping portion respectively extend from the first frame portion and the second frame portion and are securely connected to the lens holder; and wherein the first frame portion and the first gripping portion constitute a first part of the leaf spring and the second frame portion and the second gripping portions constitute a second part of the leaf spring.
8. The lens driving apparatus of claim 1 , wherein the bent portion of the driving coil is suspended within the recess.
9. The lens driving apparatus of claim 1 , wherein the lens holder includes:
a first surface,
a second surface parallel to the first surface,
a third surface extending between the first and the second surfaces, and
a fourth surface extending between the first, second and third surfaces,
wherein the recess is defined by the first surface, the second surface, the third surface and the fourth surface that are independent from the external surface to which the driving coil is attached.
10. The lens driving apparatus of claim 9 , wherein the bent portion of the driving coil is suspended above the fourth surface.