Implementations of bicycle trailers may include a first end and a second end, the second end opposite the first end, a first plurality of latches coupled to the first end, and a second plurality of latches coupled to the second end. The first plurality of latches may be configured to secure a rear-facing child's car seat facing the first end. The second plurality of latches may be configured to secure the rear-facing child's car seat facing the second end. The second plurality of latches may be configured to secure a front-facing child's car seat facing the first end.

A mobility device includes a sidecar and a tilting vehicle including a two-wheeled bicycle, and may further include: an articulated link member including multiple link arms configured to link a vehicle body of the tilting vehicle and a body of the sidecar. In particular, linkage movements of the respective multiple link arms provide upward and downward movements, and leftward and rightward tiltings of the sidecar when a center of gravity of the vehicle body moves leftward and rightward.

A trailer-coupling assembly is described for securing a trailer to a two-wheel vehicle. The trailer-coupling assembly is rigidly fixed to a rear-wheel frame of a two-wheel vehicle and the utility bed of a trailer. The trailer-coupling assembly is comprised of three joints that each rotate about three separate cardinal axes, permitting the trailer to navigate rough terrain without transferring rotational loading to the two-wheel vehicle. Each joint is configured to rotate at least 90 degrees in a clockwise direction and an anti-clockwise direction about a cardinal axis, providing the trailer-coupling assembly with flexibility to navigate the two-wheel vehicle and trailer over various grades of rough terrain.

A child transport carrier includes an upper frame member having a forward end and a rear end and a rear frame coupled to the upper frame member. The rear frame includes a lower rear frame member, an upper rear frame member having an upper end fixedly coupled to the rear end of the upper frame member, and a first joint assembly coupling the lower rear frame member and the upper rear frame member. The rear frame is configured to fold between an unfolded in-use position and a folded storage position. The upper frame member and the upper rear frame member are fixed relative to each other. The first joint assembly is disposed longitudinally rearward of the forward end of the upper frame member and longitudinally forward of the rear end of the upper frame member in the unfolded in-use position.

A stroller is provided with the ability to removably couple and decouple a seat from the stroller as needed. The stroller can include a stroller frame. The stroller can also include one or more front wheels attached to the stroller frame and one or more rear wheels attached to the stroller frame. The stroller can also include a first seat coupled to the stroller frame. The stroller can include first and second seat attachment housings. Each of the seat attachment housings can include a cavity for receiving a corresponding one of the first and second seat attachment adapters. Each of the seat attachment housings can also include a door cover to prevent access to the respective cavity when not in use. The seat attachment adapters can be coupled to the respective seat attachment housings and a second seat can be coupled to the seat attachment adapters.

A foldable frame structure for trailer so designed that the distance between the pivot connection center of each pivot holder and the left/right side frame and the topmost edge of the left/right frame bar of the bottom frame is greater than the distance obtained by deducting the width of the collapsed bottom frame from the height from the left/right frame bar of the bottom frame to the topmost edge of the left/right side frame. Thus, the left side frame and the right side frame can be individually collapsed and closely attached to the bottom frame in one step. The present invention can greatly save the transportation volume and simplify the folding structure and folding action, and thus achieve the purpose of user's convenient collection and carrying.

A stroller is provided with the ability to removably couple and decouple a seat from the stroller as needed. The stroller can include a stroller frame. The stroller can also include one or more front wheels attached to the stroller frame and one or more rear wheels attached to the stroller frame. The stroller can also include a first seat coupled to the stroller frame. The stroller can include first and second seat attachment housings. Each of the seat attachment housings can include a cavity for receiving a corresponding one of the first and second seat attachment adapters. Each of the seat attachment housings can also include a door or cover to prevent access to the respective cavity when not in use. The seat attachment adapters can be coupled to the respective seat attachment housings and a second seat can be coupled to the seat attachment adapters.

A stroller is provided with the ability to removably couple and decouple a seat from the stroller as needed. The stroller can include a stroller frame. The stroller can also include one or more front wheels attached to the stroller frame and one or more rear wheels attached to the stroller frame. The stroller can also include a first seat couple to the stroller frame. The stroller can include first and second seat attachment housings. Each of the seat attachment housings can include a cavity for receiving a corresponding one of the first and second seat attachment adapters. Each of the seat attachment housings can also include a door or cover to prevent access to the respective cavity when not in use. The seat attachment adapters can be coupled to the respective seat attachment housings and a second seat can be coupled to the seat attachment adapters.

A bicycle trailer is disclosed which can be reconfigured to act as a bicycle transport unit. When the trailer is in use towed behind a bicycle, its internal volume for receiving items to be transported is too small to accommodate a bicycle, even if the bicycle is broken down into its major parts. In accordance with the invention, the trailer has an internal frame (1 to 7), parts of which can be telescopically arranged in others to enable the frame to be enlarged or reduced in size, and an external shell (35, 36, 40) with foldable sections. The base of the frame (1) may have wheels (15, 17) enabling it to be rolled along when used as a carrying case. The trailer wheels (11) may be detachably mounted to either side of the frame base (1). A towbar (20) may be detachably fixed to the frame base (1).

Disclosed is a bike trailer having a main frame and a seat structure. The main frame defines an accommodating space for a passenger or load to be transported. The seat structure is transferable between an operational state in which the seat structure forms a seating area for the passenger, and a stowed state in which the seat structure is folded away thereby allowing the transport of loads other than passengers. The seat structure comprises a backrest portion with a seating side for at least partially contacting the back of a passenger. The backrest portion is accommodatable in the bike trailer such that at least the seating side of the backrest portion is protected against contact with loads to be carried when the seat structure is in the stowed state.