Power Scissors

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Power Scissors Dissection


The primary function of the Power Scissors is to cut through different materials. There are two blades, the bottom one stays stationary, and the top blade moves rapidly, opening and closing. This action allows the tool to cut through things.


The table belows lists the components for the Black & Decker Power Scissors

Table 1: Power Scissors Component List
Part # Part Name Category Function Material Picture
1 Motor Input Serves as Power Supply for blades
2 External Casing Structural Component Protects internal components and holds them together Plastic
3 Jaws Ouput The bottom blade remains stationary, while the top blade moves continually up and down Steel
4 Battery Input Provide power to motor Wrapped in cardboard
5 Cam Motion Conversion This forces the bracket to move by translating rotation motion of the motor, to translational movement in the bracket. The bracket then causes the upper blade to open and close Plastic
6 Screws Structural Holds Casing Together Metal
7 Bracket Support element Ball and socket joint limits movement of jaws. The socket is ovular so it allows some movement of the jaws. Plastic
8 Button (spring) Motion Conversion Closes switch to start motor by closing circuit. Button – plastic

Spring – metal Switch - metal -

User Requirements

a. Blades are sharp enough to cut different materials

  i.	   Have a sharpening function

b. Easy to use

  i.	   Has a low weight
  ii.	   Has a small size
  iii.	   Comfortable to hold
  iv.	   Wireless
  v.	   Easily accessible buttom to start

c. Aestheically Pleasing

  i.	   More likely to be bought

d. Long battery life, chargeable e. Changeable blades for different materials to cut f. Doesn’t break if dropped

Engineering Specifications 1. Material for jaws is sharper than cutting materials strength. This corresponds to E. 2. Battery Life is ______ long. This correspsonds to D. 3. Force of scissors is greater than _____. This corresponds to A. 4. Weight is less than _______ (5 lbs?). This corresponds to B. 5. Scissors retain sharpness for _______ (amt of time). This corresponds to A. 6. torque on motor is ______. This corresponds to A. 7. External casing can withstand ______ force, to avoid being dropped. This corresponds to F. 8. A certain percentage of people when surveyed said that the scissors are pleasing. This corresponds to C.