An insertion tongue for a belt retaining system in patient transport displays a tongue plate with a belt duct and a belt surround bar opposite the belt duct, around which, in use, a belt is placed and which is displaceably supported transversely to its longitudinal direction. The belt surround bar has two bars parallel to one another, with one or more rotatable rollers or pulleys being arranged on the bar which is outer in relation to the insertion tongue.

A buckle assembly includes a first buckle, a second buckle, an operating portion, a locking component and a resilient portion. The first buckle includes an inserting end whereon an engaging portion is formed. An installation slot is formed on the second buckle for receiving the inserting end. The operating portion is disposed on the second buckle, and the locking component is fixedly connected to the operating portion. The locking component can be locked with or released from the engaging portion. The resilient portion is biased to separate the inserting end from the installation slot. The operating portion is operated to drive the locking component to release from the engaging portion. The inserting end can be separated from the installation slot by the resilient portion, so as to unlock the first buckle and the second buckle. The buckle assembly has advantages of easy operation and simplified structure.

A buckle according to the present invention has two opposing ends that are removably attached to each other using a locking system. On one end of the buckle, the locking system includes two opposing locking pins coupled to a spring that is fully enclosed and protected from external elements. On the other end, corresponding rivets or pin casings with plungers are operable to receive the locking pins and lock the two ends together or push the pins out of the casings to release the buckle. The buckle may also include a plug that is removably attached to the adjustable loop end and allows the central bar of the adjustable loop end to be removed without deforming the central bar. Alternatively, each end of the buckle may include self-aligning tabs that guide the ends of the buckle for fastening and aid in the stability of the buckle.

An apparatus for assisted buckle release employing a generally C-shaped, V-shaped, or U-shaped assistive device adapted to depress a buckle's release button, such as a button typical of a child car seat restraint harness, and thereby assist in unlocking the buckle.

A buckle device capable of displaying a locked state includes a main body unit, a latch unit, a fastening unit, an electromagnetic unit, and a control unit. The main body unit includes a main body and the latch unit includes a detachable tongue element. The fastening unit includes a bolt body interfering with the tongue element. The electromagnetic unit includes an electromagnetic module and an electromagnetic rod. The electromagnetic module controls the electromagnetic rod to interfere with the bolt body. The control unit includes a control module, a display module and a magnetic rod detection module for detecting the position of the electromagnetic rod. The control unit receives detection information of the magnetic bolt detection module and controls the display module to display a current state according to the position of the at least one electromagnetic rod.

A buckle has a buckle mechanism with a lock pawl and a latch pin. The latch pin is designed to travel only in a longitudinal or horizontal direction relative to the buckle mechanism. When a latch plate assembly is secured, the latch pin holds the lock pawl in a latched position and prevents accidental release of the latch plate assembly. A release button is coupled to the latch plate retention bar so that all of the effective actuation and other motions are in the longitudinal direction of the buckle mechanism. The buckle mechanism has an ejector mechanism with an ejection spring for ejecting the latch plate assembly.

A safety belt buckle includes a buckle body, a plurality of latch plates, and a dustproof cover. The buckle body includes a base having a plurality of insertion slots. The dustproof cover is mounted on the base and has a plurality of passages. Each of the latch plates has a locking portion inserted through one of the passages of the dustproof cover into one of the insertion slots of the base. The locking portion has a clamping section arranged between each of the latch plates and the base. The clamping section of each of the latch plates seals one of the passages of the dustproof cover and stops one of the insertion slots of the base. The locking portion of each of the latch plates is clamped by one of the passages of the dustproof cover.

Two-stage clasp mechanisms, and related systems and methods, are disclosed herein. In some embodiments, the clasp mechanism includes a first housing portion, a second housing portion configured to connect to the first housing portion, and a locking mechanism configured to secure the first and second housing portions together. The locking mechanism can include a first striker carried by the second housing portion, a second striker movably carried by the first housing portion, and a blocking component movably carried by the second housing portion. The second striker is moveable along a first direction between an engaged position and a disengaged position with the first striker. The blocking component is movable along a second direction at an angle with respect to the first direction between a first position that prevents the first striker from moving and a second position that allows the second striker to move.

A safety belt latch assembly includes an adjusting section, a snap-fit piece, and a strap winding bar. The adjusting section is provided with an opening and two side plates. Each of the side plates of the adjusting section is provided with an elongate slot. The snap-fit piece has a first end provided with a torsion portion twisted from the adjusting section, with a torsion angle of ninety degrees (90°) being defined between the snap-fit piece and the adjusting section. The snap-fit piece has a second end provided with a fastening portion having a fastening hole. The strap winding bar is provided with two contact portions. Each of the contact portions of the strap winding bar is inserted into the elongate slot of one of the side plates of the adjusting section.

A harness system is provided and includes an upper buckle, an upper strap and a restraining assembly. The upper strap includes shoulder portion and a waist portion divided by the upper buckle. A through slot is formed on the upper buckle. The restraining assembly includes an anti-sliding structure, a beam structure disposed on the upper buckle and a stopping component. The through slot includes a first portion and a second portion divided by the beam structure and respectively adjacent to the shoulder portion and the waist portion. The upper strap passes through the first portion of the through slot from bottom to top and passes through the second portion of the through slot from top to bottom. The stopping component is detachably disposed on the shoulder portion and configured to abut against the upper buckle for restraining a sliding movement of the upper buckle relative to the upper strap.