Disclosed is a buckle (5) for a chest strap (320) of a knapsack (300), including a plug member (100) including a plug plane portion (104) formed at a front side of a plug base (101) so as to be connected to the plug base via a plug inner-side slope (105), a plug front-end slope (106) extending forward from the plug plane portion, a first magnet (110) embedded in a middle portion of the plug plane portion, and coupling protrusions (107) protruding from opposite sides of the first magnet, and a socket member (200) including a socket plane portion (204) formed at a front side of a socket base (201) so as to be connected to the socket base (201) via a socket inner-side slope (205), a socket front-end slope (206) extending forward from the socket plane portion, a second magnet (210) embedded in a middle portion of the socket plane portion, and coupling recesses (207) formed in opposite sides of the second magnet so as to correspond to the respective coupling protrusions.

Disclosed is a buckle including a plug member (100) and a socket member (200). The plug member includes a plate (106) extending forward from a lower end of a base (101) and having a first magnet (120) embedded in a middle portion thereof, and a holder (107) protruding from a front end of the plate. The socket member includes an upper plate (204) extending forward from an upper end of a base (201) and having a second magnet (220) embedded in a middle portion thereof, side plates (205) formed on opposite sides of the upper plate, and a accommodation region (206) formed inside the upper plate and the side plates so as to accommodate the plate (106) therein. The upper plate has a holder aperture (207) formed therein so that the holder is seated in the holder (107) aperture when the plug member and the socket member are coupled to each other.

A waist belt fastener system includes a belt and a buckle mechanism attached to the belt. The buckle includes a rectangular frame having upper and lower sides that are curved outwardly, creating a convex shape that curves away from the belt wearer. At the rear side of the buckle frame where the buckle attaches to the belt, a fixed tongue member projects away from the buckle frame. This tongue member is fastened to the belt such as by a rivet, firmly anchoring and securing the buckle to the belt and inhibiting movement of the buckle relative to the belt. At the front side of the buckle frame, a fixed prong projects inwardly towards the buckle opening. The prong rests against the belt once it is threaded through the buckle opening. A hook and loop closure system is used to attach the ends of the belt together once the belt is inserted through the buckle opening.

A utility belt buckle device for removing caps from bottles. The utility belt buckle device includes a base portion and a cover portion. The cover portion has an aperture therein. The aperture is elongate. A hinge assembly hingedly couples the cover portion to the base portion. A locking assembly releasably locks the cover portion in the closed position. The locking assembly includes a slot, which extends through base portion. A latch is fixedly coupled to the cover portion. The latch is positioned such that the latch may extend through the slot when the cover portion is abutted against the base portion. An actuating means selectively holds and releases the latch from the slot. A coupling means removably couples the base portion to a user. The coupling means comprises a strap having the strap has a first end and a second end and a coupling assembly fixedly mounted on the base portion for removably coupling the first and second ends of the strap to the base portion.

The buckle (1) comprises a compartment (11) that cannot be seen from the outside, for holding small objects, said compartment being easily accessible to the user who is wearing the buckle.

Disclosed is a buckle including a plug member (100) and a socket member (200), wherein the plug member includes lock arms (105) and a guide rod (110) located at a middle position between the lock arms, and the socket member includes a holder formed in a chamber (205) so as to catch the lock arm. The guide rod is provided on one end thereof with a magnet (120), and the socket member is centrally provided with a guide groove (210) for the coupling of the guide rod and is also provided with a magnet (220). As such, in addition to the coupling between the lock arm and the holder, another coupling structure is provided between the magnets so as to prevent the buckle from being easily unfastened by unintentional external contact or pressure while ensuring convenient separation of the buckle with one hand as needed.

A belt buckle structure includes a buckle (2) and a circular element (3). The buckle has a surface with a recess (21) formed thereon. A first step surface (22) and a second step surface (23) in the recess are formed at different elevations. The second step surface (23) is at a higher elevation and has a first positioning magnet (24) and a second positioning magnet (25) located thereon. The circular element (3) slides clockwise or counterclockwise to be positioned at a desired location in the recess, and can be removed or positioned as desired whenever needed by users. Thus the functionality of the belt can be increased, and the difficulty of positioning the graphic on the top surface of the circular element in the correct alignment can be resolved.

A holder (1) for an electronic detection element (2), which is adapted for attachment about the neck or other part of the body of an animal to be detected by means of a band (6). The holder is provided with a cavity for receiving the detection element (2) and with at least one clamping member (3) for adjustably clamping a band end.