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Revision as of 09:21, 31 January 2007

Group 3

• Kristine Falletta
• Kacy Hess
• Galen Mullins
• Josh Schmieder

Product Dissection

The following notes were taken prior to and during product dissection.

Function/Purpose

The function of the product is to fasten materials together using staples. This product is meant to be used to hang items from surfaces (such as walls, ceilings, etc.), attach one item to another, and other similar actions. It can also be used to shoot stables at targets, though this is not an intended use.

Inputs/Outputs

In order to use the stable gun both a force and a material are needed. The staples must be properly loaded in the gun, after which the proper force must be applied to the handle (generally created by the squeezing of a hand). This results in a stable projectile (typically into a surface) and recoil from the handle.

Typical Use Scenario

1. Pick up the staple gun and placed hand on handle
2. Positioned material with empty hand against item to be fastened to
3. Positioned gun against the material
4. Squeezed handled to release staple
5. Removed gun and checked to see if the materials were fastened together
6. No staple is present so repeats steps 2-5
7. Locates reloading place for staples
8. Removes slider on bottom of gun to check for staples
9. When no staples are present, finds staples and attempts to insert them
10. Positions staples over extruded part of staple loader and tries to close gun
11. When the slider will not close, repositions staples inside gun and closes slider successfully
12. Repeats steps 2-5
13. Finds that staple has successfully attached the two materials

Note: May have to unlock staple gun or adjust staple power before use. Do not always have to insert new staples.

Intended Use/Limitations/Annoyances

As previously stated, the intended function of this product are to fasten materials together by shooting a staple through them. Other features that are used to enhance this function include the ability to lock the handle for more compact storage and/or safety reasons, adjustable power so that the user may staple with more or less force, as well as a loading mechanism. Staples may be loaded by sliding the bottom of the stapler out, inserting the staples into the open compartment, then sliding and locking the bottom of the stapler back in place. There are a number of limitations and annoyances with this design. With regards to typical use, a great amount of force is required to squeeze the handle for shooting staples. It is also difficult to adjust the power. Furthermore, it is difficult to stretch over a distance and still be able to exert enough force to squeeze the handle and press down on the surface. It is even more difficult to reach into small or tight places due to the size of and configuration of the staple gun. As for safety, there is no safety lock currently installed. Note that the lock that is already on the stapler is intended for storage purposes, and does not prevent the accidental trigger of the staple gun. Also, the size is awkward and difficult to store or carry when also using other tools. Some of the advantages of this design are its sturdiness and solid weight, the easy loading mechanism (once the process is known), the comfortable grip, and the availability of a power adjustment option (which also makes the product seem higher in quality/more advanced).

Different Users / Use Scenarios

There are some instances that may occur in which the user might find this product difficult to use. Should the force to dispense staples be too high, people with small or weak hands would not be able to use it. On the other end of the spectrum, people with large hands may not be able to fit their hands in the handle. Another scenerio that could occur is the desire to use the staple gun improperly (e.g. shooting staples at one another). Finally, people who need to fit staples in small, tight places may not be able to get the gun into those places.

Other Stakeholders

Identify other stakeholders besides the end user, such as those who manufacture, distribute, sell, purchase, assist, install, maintain, repair and manage the product's end of life. Document attributes of the product that affect these stakeholders.

Dissection

Procedure with pictures coming soon. Preview: http://picasaweb.google.com/kfalletta/StapleGun12407

Documentation

Parts List

Part #	Part name	QTY	Function	Wt.(kg.)	Material	Photo
001	Hexstar screw	4	Holds opposite sides of chassis together, unique design prevents it from being taken apart	<.001	?
002	Safety Storage Lock	1	Holds down trigger handle for smaller profile during storage	<.001	aluminum
003	Chassis/top	1	Provides support and protection for components, screws enter from this side	.117	aluminum
004	Inner Grip	1	Provides comfortable place to hold onto staple gun	.016	plastic/black
005	Reloader spring	2	Pushes on handle to return it to it's upright position	<.001	?
006	Spring Holder	1	Anchors the reloader springs	.002	Plastic/Black
007	Loader	1	Greased plastic latch attached to halde which catches and pulls back the tensions bars until it reaches the release point where it's curved shape releases the bars suddenly	0.024	plastic	coming soon
008	Handle	1	A metal bar that connects to the loader and transfers the force input of the user by proxy of the loader to the tension bars	.071	steel
009	Handle Grip	1	A plastic cover for the handle which allows the user a more comfortable hold when using the stapler	-	plastic/black
010	Handle grip screw	4	Phillips screw which attaches Handle Grip to Handle	#	?
011	Pin (Large)	1	Acts as a pivot point for the handle, anchoring it to the chassis	0.005	steel
012	Pin (Small)	3	Act as either pivots for loader/handle or provides point loads which to tension bars which both hold them in place and provide a pretension condition	0.003	steel
013	Stapler Loader	1	(Assembly) Pushes the staples into place to be launched	0.041	(Assembly-plastic)
014	Staple Queue	1	Provides location for staple storage and holds them in place until they are to be launched	0.027	(Assembly - plastic)
015	Staple Piston	1	powered by the tension bars this piece of metal knocks the stapler out of the gun and into the material	0.007	steel
016	Staple Piston Guide	1	attaches to piston and provides support and railings to guide it along its path	0.023	steel
017	tension bar (lower)	1	Stores energy for driving staple piston using the spring properties of a beam	0.050	steel
018	tension bar (upper)	1	Stores energy for driving staple piston using the spring properties of a beam. Is shorter than lower bar	0.048	steel
019	power lever	1	Adjusts the level of pretension in the bar	0.003	plastic-black
020	Chassis (bottom)	1	Provides support and protection for components	.134	aluminum
021	Spacer	1	Acts as a stop to prevent the tension bar from going to far, absorbs impact from tension bar when staple gun is fired	0.005	plastic-transparent