Features for Prototype Development and Testing 
1.     Collapsible/Adjustable Mechanism: 
Sections and Joints: The uprights of the crutch are segmented with adjustable openings. This design allows users to customize the height according to their needs. During prototype testing we will ensure that the locking system is not only secure but also user-friendly and able to endure numerous adjustments. 


Adjustment Holes: This aspect facilitates simple modifications. Testing will involve various height settings to confirm that the mechanism can consistently support weight at each position without failure.
2.     Mechanism for Folding/Collapsing:
Switch: The design features a switch that facilitates the adjustment or folding of the crutch, which appears to necessitate a “press and move” action. For the prototype we will make sure the switch operates smoothly and effectively locks or unlocks the sections without any sticking issues.
Functional Trials: we will perform trials to verify that the switch remains secure during movement and does not inadvertently release. We will test it with various weights to ensure it operates effectively under load.
3. ��   Hand Grip:
Design: The prototype will feature a comfortable, non-slip grip that alleviates hand strain during extended use.
Testing: we will valuate the handle’s comfort, particularly over long durations. We will consider incorporating materials such as foam or rubber to enhance cushioning and provide anti-slip features.







4.     Auxiliary Support and Shoulder Rest:
Shape and Position: The auxiliary support positioned at the top along with the shoulder rest should be robust and comfortable.
Testing: we will conduct trial sessions to verify that the shoulder rest remains comfortably in place without slipping. We will Involve a variety of users to ensure that the support distributes weight uniformly.


5.     Rubber Tip for Stability:
Non-slip Design: The base should ensure stability, equipped with a rubber tip that prevents sliding on various surfaces.
Functional Testing: we will assess the rubber tip on different surfaces (wet, dry, rough) to confirm stability. We will evaluate for wear and durability, as this component will experience significant stress.





Functional Trials for Prototypes 
·        Weight Capacity Assessment: Evaluate the entire crutch to verify it can support various weight loads without bending or breaking. Begin with lighter weights and gradually increase.
·        Folding and Unfolding Assessment: Conduct multiple cycles of collapsing and expanding the crutch to ensure the joints, switch, and adjustable components operate smoothly without loosening or damage.
·        User Comfort Evaluation: Allow individuals of different heights and weights to use the crutch in various situations (e.g., walking, climbing stairs) to evaluate comfort, grip, and adjustability.
·        Durability and Longevity Test: Mimic prolonged use to determine how well the materials (particularly the rubber tip, hand grip, and switch) withstand wear over time.
·        Safety Verification: Ensure that the switch and adjustable components lock securely during use and that there are no sharp edges or areas that could pinch a user's fingers.