Baby stroller
From DDL Wiki
Usability study
This study looks at the different functions of the stroller and how the user achieves their goals. It will be broken down into different functions, and give a step by step analysis of different ways the user achieves the goals.
Putting a baby in the stroller/Removing baby from stroller
In order to insert a child into the stroller, the user first (1) ensures the stroller is stationary. Then the user can put the child by (A.2) unlatching the harness (Part Number), then (A.3) putting the child into the seat and then (A.4) latching the harness around the child.
Alternatively the user can insert a car set into the stroller. This requires the user to (B.2) put the car seat into the stroller seat and then (B.3) latch the car seat into the stroller by wrapping the car seat latch (Part Number) around the car seat, and fastening it.
In order to remove the baby, the step are simply performed in reverse, where you first (5) unlatch the harness or car seat latch and then (6) remove the child from the seat.
Folding the stroller
In order to fold the stroller, the user must first (1) ensure that the stroller is empty. Once that is done, the user can (A.2) pull on the white push knob (Part Number) on the handle assembly (Assembly Number). The user then (A.3) twists the handle assembly forward approximately 180 degrees. This unlocks the middle bar by separating the locking mechanism (Part Number). Then the user (A.4) pushes the handle bar down towards the floor. This often causes the stroller to fold at the locking mechanism and the wheels to slide towards the user quickly, so to combat this affect, the user can either (A.5.1) put their foot on the brake bar (Part Number) or (A.5.2) engage the braking mechanism before using this function. Alternatively, the user can (B.2) lift up on the handles of the locking mechanism (Part Number) in order to disengage the lock. This method brought about a problem in that these handles are within reach of the child who is in the stroller, and could be used by the child to their danger. We will discuss this point later in the report.
Moving the baby around
In order to move the baby around while in the stroller the user has many options. To push the stroller forward, the user simply (1) pushes forward on the handles.
In order to move the stroller around a corner, the user can either (2) supply a moment to the handle or (3) push down on the handle, lifting the front wheels of the stroller off of the ground, and then supply a moment, allowing the stroller to make sharper or more maneuverable turns.
A note is that the user should not push the stroller anywhere except the handle in order to control the stroller, nor should the user push the handle with excessive force or speed, as doing so results in the stroller becoming unstable and potentially tipping over.
Keeping the stroller stationary
In order to engage the locks of the stroller, the user (1) presses down on either the left or the right break (Part Number). Most users push this break with their foot, as it located on the break bar/rear wheel assembly.
How this assembly works is that a solid bar engages with a gear located on the wheel, which keep the wheel from rotating.
Also in order to lock the front wheels from turning, the user (1) pushes the front wheel locks (Part Number) upwards until it clicks. This stops the front wheels from turning, but not rotating.
Transporting stroller without baby
In order to transport the stroller without a child in it, the user first (1) folds the stroller. Then the user can (A1) carry it by one of the structural bars (Part Number), (B1) carry it by the plastic tray (Part Number), or (C1) by the handle (Part Number). Each method has been observed in user studies.
