Battery Case with Secure and Waterproof Lock, and Headlamp Comprising the Same

A battery housing case for a headlamp, comprising:

• a case body (10) having a front face (11), a rear face (12) and two left and right side faces (13, 14),
• wherein said rear face (12) has a hinge (19) allowing rotation of a cover 20 relative to a first axis of rotation substantially parallel to the upper rear edge;
• wherein each of the left and right side faces (13, 14) has, at the front portion of said case, a substantially circular groove (15, 16) centered on a point defining a second axis of rotation;
• said case cover (20) has an upper face, two left and right side faces and a rear side face,
• wherein said rear side face has a pivot connection allowing rotation of the cover about said first axis;
• wherein said cover (20) comprises respectively on the left and right side faces a blind hole (23, 24) materializing said second axis of rotation, and configured to receive two pins (33, 34) located on the two ends of a U-shaped lever (30) so as to allow its rotation about the second axis of rotation,
• said locking lever (30) comprising two left (31) and right (32) branches,
• wherein the inner face of the left branch (31) comprises a first perpendicular pin (33) and the inner face of the right branch (32) comprises a second pin (34);
• wherein said first and second pins (33, 34) are configured to be inserted into said blind holes (23, 24) of said cover (20) so as to complete a pivot connection of said lever (30) relative to said cover (20) about said second axis of rotation;
• wherein said U-shaped lever (30) further comprises, on each of the two external faces of the left and right branches (31, 32), a cam (35, 36) having a substantially circular shape centered around said second axis of rotation;
• wherein said lateral faces (13, 14) of said housing (10) comprise, at the front part, two circular grooves (15, 16) centered around the second axis of rotation, and configured to receive the passage of said circular cams (35, 36), respectively, when the cover is in the closed position with the lever in the deployed position and the lever is pivoted to insert the circular cams (35, 36) into their respective circular grooves (15, 16) ensuring force locking.