Motorized window treatment

1. A motorized window treatment comprising:

a roller tube configured to rotate about a longitudinal axis that defines a longitudinal direction;

a flexible material that is attached to the roller tube, the flexible material operable between a raised position and a lowered position via rotation of the roller tube;

a motor drive unit located within the roller tube, the motor drive unit comprising a motor and a housing that is configured to house one or more batteries for powering the motor drive unit, the motor drive unit configured to control the motor to rotate the roller tube to adjust the flexible material between the raised position and the lowered position; and

a first mounting bracket configured to rotatably support an end of the roller tube and mount the motorized window treatment to a structure surrounding a window, the first mounting bracket comprising:

a stationary portion configured to be attached to the structure surrounding the window, the stationary portion comprising a catch; and

a pivoting portion configured to receive an end portion of the housing, the pivoting portion configured to operate the motorized window treatment between an operating position and an extended position, wherein the end portion of the housing is accessible when the motorized window treatment is in the extended position, and wherein the pivoting portion is aligned with the stationary portion when the motorized window treatment is in the operating position such that the end portion of the housing is covered by the stationary portion, the pivoting portion comprising a stopping mechanism configured to engage the catch to prevent the motorized window treatment from extending beyond the extended position.

2. The motorized window treatment of claim 1 , further comprising a second mounting bracket configured to rotatably support an opposed end of the roller tube, wherein the second mounting bracket is configured to be attached to the structure surrounding the window.

3. The motorized window treatment of claim 1 , further comprising a battery holder that is configured to retain the one or more batteries, the battery holder configured to be received within a cavity of the housing.

4. The motorized window treatment of claim 1 , wherein the pivoting portion defines an opening configured to receive the end portion of the housing, wherein the pivoting portion is configured to attach the end portion of the housing to the first mounting bracket.

5. The motorized window treatment of claim 4 , wherein an inner surface of the pivoting portion that defines the opening comprises a plurality of tabs configured to engage complementary features on the end portion of the housing to attach the end portion of the housing to the first mounting bracket.

6. The motorized window treatment of claim 1 , wherein the stopping mechanism comprises a stopping arm extending from a lower wall of the pivoting portion.

7. The motorized window treatment of claim 6 , wherein the catch extends from a lower wall of the stationary portion.

8. The motorized window treatment of claim 6 , wherein the stopping arm defines an upper surface that is configured to abut the catch.

9. The motorized window treatment of claim 6 , wherein the stopping arm is configured to engage the stationary portion to secure the motorized window treatment in the operating position.

10. The motorized window treatment of claim 6 , wherein the pivoting portion defines one or more slide guides.

11. The motorized window treatment of claim 10 , wherein the stationary portion defines channels that are configured to receive the slide guides as the motorized window treatment is operated between the operating position and the extended position.

12. The motorized window treatment of claim 11 , wherein a curvature of the channels defines a pivot path of the pivoting portion of the first mounting bracket as the motorized window treatment is operated between the operating position and the extended position.

13. The motorized window treatment of claim 1 , wherein the stopping mechanism comprises a flexible strap defining a first strap end and a second strap end, the first strap end configured to be captively received within the pivoting portion of the first mounting bracket, the second strap end configured to be secured to the stationary portion of the first mounting bracket, wherein the flexible strap is configured to prevent the motorized window treatment from pivoting beyond the extended position.

14. The motorized window treatment of claim 13 , wherein the catch extends from an upper wall of the stationary portion.

15. The motorized window treatment of claim 2 , wherein the pivoting portion of the first mounting bracket defines a first channel that is configured to receive the first strap end, and wherein first strap end is configured to translate within the first channel as the motorized window treatment is operated between the operating position and the extended position.

16. The motorized window treatment of claim 15 , wherein the stationary portion of the first mounting bracket comprises a first arm, a second arm that is substantially perpendicular to the first arm, and a plate that is attached to the first arm and the second arm.

17. The motorized window treatment of claim 16 , wherein, when the motorized window treatment is in the extended position, the first strap end interlocks with a tab within the first channel of the pivoting portion of the first mounting bracket and the second strap end interlocks with a catch on the stationary portion of the first mounting bracket.

18. The motorized window treatment of claim 17 , wherein the catch extends from the first arm of the stationary portion of the first mounting bracket.

19. The motorized window treatment of claim 17 , wherein the pivoting portion of the first mounting bracket comprises a latch that is configured to secure the motorized window treatment in the operating position.

20. The motorized window treatment of claim 19 , wherein when the motorized window treatment is in the operating position, the latch engages a tab extending from the first arm of the stationary portion of the first mounting bracket.

21. The motorized window treatment of claim 20 , wherein the latch is configured to disengage from the tab when a force greater than a pre-defined threshold force is applied to the roller tube in a direction away from the window.

22. The motorized window treatment of claim 16 , wherein the plate defines a slide extending from an inner surface of the stationary portion of the first mounting bracket.

23. The motorized window treatment of claim 22 , wherein the pivoting portion comprises a second channel that is configured to receive the slide.

24. The motorized window treatment of claim 22 , wherein a curvature of the slide defines a pivot path of the pivoting portion of the first mounting bracket as the motorized window treatment is operated between the operating position and the extended position.

25. The motorized window treatment of claim 24 , wherein the pivoting portion defines a finger that extends proximate to the second channel, the finger configured to guide the slide into the second channel.

26. The motorized window treatment of claim 24 , wherein the pivot path defines a fulcrum located below a bottom edge of the stationary portion.

27. The motorized window treatment of claim 13 , wherein the flexible strap comprises metal, plastic, or a composite material.

28. The motorized window treatment of claim 2 , wherein the stationary portion is a first stationary portion, the pivoting portion is a first pivoting portion, the end portion of the housing is a first end portion, and the flexible strap is a first flexible strap, and wherein the second mounting bracket comprises:

a second stationary portion configured to be attached to the structure surrounding the window; and

a second pivoting portion configured to receive a second end portion of the housing, the second pivoting portion configured to operate the motorized window treatment between the operating position and the extended position; and

a second flexible strap defining a third strap end and a fourth strap end, the third strap end configured to be captively received within the second pivoting portion of the second mounting bracket, the fourth strap end configured to be secured to the second stationary portion of the second mounting bracket, wherein the second flexible strap is configured to prevent the motorized window treatment from pivoting beyond the extended position.

29. The motorized window treatment of claim 3 , wherein the battery holder comprises:

an internal spring configured to maintain contact between the one or more batteries and a positive contact;

a first external spring that is electrically connected to the positive contact and external to the battery compartment within the battery holder; and

a second external spring that is electrically connected to the battery holder of the battery holder and external to the battery compartment within the battery holder,

wherein when the battery holder is received within the housing, the first external spring is configured to abut a first electrical pad on a first surface of a printed circuit board of the motor drive unit and the second external spring is configured to abut a second electrical pad on a second surface of the printed circuit board.

30. The motorized window treatment of claim 29 , wherein the motor drive unit further comprises a control circuit mounted to the printed circuit board, the control circuit configured to enter a configuration mode upon resetting after the plurality of batteries are disconnected from and reconnected to the positive spring contact.