Locking buckle

1. A locking buckle, comprising:

a male member including one or more flexible portions having a first position and a second position;

a female member adapted for receiving the one or more flexible portions in the first position and allowing the one or more flexible portions to assume the second position to form a secure engagement with the male member, the female member including a surface having an arcuate channel formed therein; and

a rotatable member engaging the arcuate channel, the rotatable member preventing movement of the flexible portions to the first position in a locked condition and allowing movement of the flexible portions in an unlocked condition.

2. The buckle of claim 1 , wherein the rotatable member comprises a knob having an upstanding sidewall projecting above the surface of the female member.

3. The buckle of claim 1 , wherein the rotatable member comprises a radially extending projection connected to the rotatable member.

4. The buckle of claim 1 , wherein the rotatable member includes a substantially planar central surface.

5. The buckle of claim 1 , wherein the rotatable member includes one or more depending projections for preventing movement of the flexible portions to the first position.

6. The buckle of claim 5 , wherein the female member includes a pair of spaced arcuate channels, each for receiving one of the depending projections.

7. The buckle of claim 1 , wherein the rotatable member includes an integral retainer.

8. The buckle of claim 7 , wherein the rotatable member is adapted for rotating relative to the female member while retained by the retainer.

9. The buckle of claim 1 , further including a detent for controlling the movement of the rotatable member relative to the female member.

10. The buckle of claim 1 , wherein a first flexible portion is adapted for engaging and rotating the rotatable member from the locked condition to the unlocked condition on insertion of the male member into the female member, and a second flexible portion is adapted for not engaging and rotating the rotatable member on insertion into the female member.

11. A locking buckle, comprising:

a male member including one or more flexible portions having a first position and a second position;

a female member adapted for receiving the one or more flexible portions in the first position and allowing the one or more flexible portions to assume the second position to form a secure engagement with the male member, the female member including a surface having an opening formed therein; and

a rotatable member for preventing movement of the one or more flexible portions to the first position in a locked condition and allowing movement of the one or more flexible portions in an unlocked condition;

wherein the male member is adapted for engaging and moving the rotatable member from the locked condition to the unlocked condition when inserted into the female member.

12. The buckle of claim 11 , wherein a first flexible portion is adapted for engaging and moving the rotatable member when inserted into the female member.

13. The buckle of claim 12 , wherein the first flexible portion includes an extension for engaging the rotatable member in the locked condition to prevent the first flexible member from moving to the first position.

14. The buckle of claim 11 , further including a detent for controlling the movement of the rotatable member relative to the female member.

15. The buckle of claim 11 , wherein the rotatable member comprises a knob having an upstanding portion projecting above the surface of the female member, the upstanding portion including a radially extending part projecting from the periphery of the upstanding portion and adapted for tactile engagement.

16. The buckle of claim 11 , wherein the rotatable member includes spaced depending projections passing through spaced channels in the female member for preventing movement of the flexible portions to the first position in the locked condition, and arranged in the path of at least a portion of the male member in the locked condition.

17. A locking buckle, comprising:

a male member including a pair of flexible portions, each having a first position and a second position;

a female member having a compartment adapted for receiving the flexible portions in the first position and allowing the flexible portions to assume the second position to form a secure engagement with the male member;

a rotatable member adapted for preventing movement of the flexible portions to the first position in a locked condition and allowing movement of the flexible portions in an unlocked condition, the rotatable member including a portion in the compartment of the female member, the portion adapted for being engaged by one of the flexible portions during insertion of the male member into the female member in order to rotate the rotatable member to the unlocked condition.

18. The locking buckle of claim 17 , wherein the female member comprises at least one arcuate channel for guiding the portion of the rotatable member in the compartment.

19. The locking buckle of claim 17 , wherein one of the flexible projections includes an inwardly directed portion for engaging the portion of the rotatable member to cause the rotation to the unlocked condition upon insertion of the male member into the female member.