Group 38 - Polaroid Camera

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Contents

Executive Summary

Disposable cameras are products that are supposed to be easy to use, functional, and portable so they can be used during travel. The Polaroid 35 mm disposable camera fits just that example. Easy to read instructions, and works just like any other camera.

We discovered through our endeavor that the disposable camera is made mostly of plastic parts, probably manufactured by injection molding. There were a few metal parts, some used for conductivity, some used for their stiffness and rigidity. Through disassembly we saw some mechanical devices that help store mechanical energy for use in the camera to take a picture. Other parts stored electrical energy for the flash of the camera. We discovered that most parts are likely made certain ways to cut costs of material with using as little as possible, and to cut down assembly costs by using parts that can be made quickly and cheaply.

Products like these are products that are usually well made for their use. Since it is disposable, the parts do not have to last that long, do not have to stand up to stresses like long term use products. As a result, we found that this disposable camera is very well made for its job, and is relatively easy to use. It's not unlike other disposable cameras, and allows one to take a camera while traveling.

Introduction

Group 38 Members and Tasks

  • Bryan Jones Presenter and Website Creator
  • Matthew Pavlovich Group Leader and Presenter
  • Matthew Tyler CAD Drawings
  • Jared Kuhl Assembly & Disassembly
  • Brian Senkiw Assembly & Disassembly
  • Nicole Bertrand Observations: Assembly & Disassembly


Product: 35 mm Disposable Polaroid Camera

A standard disposable flash capable camera. Hold flash button to charge flash until light on top of camera shows red. Wind dial on top right of camera until it stops. Preview the picture through the view finder, press down on picture button. Flash will go off, shutter will lift, and picture will be taken. Repeat process until all pictures are taken.


Energy Diagram

Below: This diagram describes the energy involved with the processes of the camera. All mechanical steps are in blue, while chemical electrical are in red. This represents how the products works. Energydiagram.jpg

Before Disassembly

Camera seems to be in good working condition. No parts on the exterior of the products appear to be broken. Evident that there are objects made of plastic, some glass in the flash, and cardboard around the outside.

DSCN0489.JPG

Disassembly Procedure

Time: 30 Minutes

Disassembly Difficulty Levels

Table 1
Difficulty Level Meaning
Very Easy An average person would have little or no difficulty doing this task.
Easy An average person would likely need some experience taking objects apart for this type of task to go smoothly.
Medium An average person would need some mechanical experience, such as backing out extremely tightened screws in small places.
Hard Not likely an average person could accomplish this task without breaking parts.
Very Hard An average person would be incapable of preforming this task.





Disassembly Steps

Table 2
Step # Process Tools Used Difficulty Picture
1 Unfold the cardboard from each side of the camera & remove it. None Very Easy
DSCN0532.JPG
2 Unscrew mini black screw from beneath the viewfinder. Screwdriver Easy
DSCN0504.JPG
3 Remove bottom cap of film cover. None Very Easy
DSCN0544.JPG
4 Remove front & back covers. None Easy
DSCN0504.JPG
DSCN0505.JPG
5 Remove the film from the film spindle. None Very Easy
DSCN0549.JPG
6 Remove viewfinder & viewfinder holder by popping it out of the front cover. None Easy
DSCN0566.JPG
7 Pop battery from the bottom of the interior body. None Very Easy
DSCN0551.JPG
8 Unscrew 2 small screws from the circuit board itself. Screwdriver Medium
DSCN0567.JPG
9 With end of a screwdriver lift up the metal battery terminal. Screwdriver Medium
DSCN0566.JPG
10 Remove long silver part from interior body by lifting it up with a screwdriver. Screwdriver Medium
DSCN0566.JPG
DSCN0567.JPG
11 Lift up lens cap with screwdriver & lens & washer will fall out. None Medium
DSCN0511.JPG
12 Lift up lens holder and camera shutter from spring. None Medium
DSCN0510.JPG
13 Remove spring from interior body. None Medium
Springcoik.JPG
14 Pop off small brass pin from top of frame counter with the screwdriver. Screwdriver Medium
DSCN0582.JPG
DSCN0595.JPG
15 Lift up 2nd brass pin from film advance lock. None Medium
DSCN0543.JPG
16 Lift up shutter lever. None Easy
DSCN0573.JPG
17 Remove camshaft from top. None Easy
DSCN0526.JPG
18 Slide out sprocket and spring out of slot on back of the interior body. None Easy N
DSCN0580.JPG
19 Remove the flash cover. None Easy
DSCN0607.JPG
20 Unscrew circuit board and metal conductor Screwdriver Easy
DSCN0517.JPG

After Disassembly

Bill of Materials

The table belows lists the Bill of Materials for the disposable camera:

Disposable Camera Bill of Materials
Part # Part Name # Material Reason of Material Used Manufacturing Process Image
1 Interior Body 1 ABS Plastic Cheap, Easy to Manufacture Injection Molding
DSCN0537.JPG
2 Film Advance Gear 1 ABS Plastic Very cheap, easy to produce Injection Molding
DSCN0543.JPG
3 Outside Cover 1 Thin Cardboard Light and Cheap Folding
DSCN0544.JPG
4 Battery 1 Alkali Metals Cheap materials Machine Made
DSCN0547.JPG
5 Circuit Board 1 Plastic, solder, capacitors, resistors Conductive, cheap, sturdiness Machined
DSCN0548.JPG
6 Film Canister 1 ABS Plastic To protect the film Injection Molding
DSCN0549.JPG
7 Flash Cover 1 ABS Plastic Cheap, easy to produce Injection Molding
DSCN0551.JPG
8 Viewfinder Holder 1 ABS Plastic Cheap and easy to produce Injection Molding
DSCN0567.JPG
9 Viewfinder 1 ABS Plastic Cheap and easy to produce Injection Molding
DSCN0566.JPG
10 Flash Cover Holder 1 ABS Plastic Seals and insulates well after tightened Injection Molding
DSCN0612.JPG
11 Film Spindle 1 ABS Plastic Cheap, ease to manufacture Injection Molding
DSCN0542.JPG
12 Lens 1 ABS Plastic Ease to manufacture, cheap Injection Molding
DSCN0571.JPG
13 Lens Holder 1 ABS Plastic Ease to manufacture, cheap Injection Molding
DSCN0570.JPG
14 Screw 1 Unknown Metal Cheap, solid material Machining
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15 Camera Shutter 1 ABS Plastic Cheap, ease of manufacture Injection Molding
DSCN0573.JPG
16 Washer 1 ABS Plastic Cheap, ease of manufacture Injection Molding
DSCN0572.JPG
17 Back Interior 1 ABS Plastic Cheap, ease of manufacture Injection Molding
DSCN0598.JPG
18 Film Cover 1 ABS Plastic Cheap, ease of manufacture Injection Molding
DSCN0565.JPG
19 Pins 2 Brass Cheap, strength Machining
DSCN0595.JPG
20 Camshaft 1 ABS Plastic Ease of manufacture, cheap Injection Molding
DSCN0594.JPG
21 Spring 1 ABS Plastic Ease of manufacture, cheap Injection Molding
DSCN0591.JPG
22 Front Interior 1 ABS Plastic Ease of manufacture, cheap Injection Molding
DSCN0563.JPG
23 Screws(2) 2 Metal Cheap, strength Molding
DSCN0556.JPG
24 Flash Button Conductor 1 Metal Cheap, Conductivity Molding
DSCN0552.JPG
25 Sprocket 1 ABS Plastic Cheap, Conductivity Molding
DSCN0579.JPG
26 Shutter Spring 1 Steel Elasticity of Material Die Casting
DSCN0578.JPG
27 Circuit Board Brace 1 Metal Cheap, strength Die Casting
DSCN0574.JPG
28 Lens Cap 1 ABS Plastic Ease of manufacture Injection Molding
DSCN0575.JPG
29 Film Advance Lock 1 Metal Cheap,rigidity Stamping or Die Casting
DSCN0584.JPG
30 Spring for Shutter Lever 1 Steel Stiffness/Elasticity Forming or Die Casting
DSCN0583.JPG
31 Frame Counter 1 ABS Plastic Cheap, ease of manufacture Injection Molding
DSCN0582.JPG
32 Shutter Lever 1 ABS Plastic Cheap, ease of manufacture Injection Molding
DSCN0580.JPG

CAD Assembly

As a group we felt the most intricate mechanical part was the winding and the shutter mechanism. It contains several springs, and gears that help store and transfer energy to move the film into position and snap open the shutter for a fraction of a second.

Winding of the camera and Shutter Mechanism
Part Image File
Full Assembly
Fullassembly6.jpg
No download available.
Full Assembly(2)
Fullassembly3.jpg
No download available.
Part
Blackholder.jpg
blackholder.prt.zip
Part
Blackpin.jpg
blackpin.prt.zip
Part
Brassclip.jpg
brassclip.prt.zip
Part
Brasspin.jpg
brasspin.prt.zip
Part
Springclip.jpg
springclip.prt.zip
Part
Counterwheel.jpg
counterwheel.prt.zip
Part
Largeblackwheel.jpg
largeblackwheel.prt.zip
Part
Smallblackwheel.jpg
smallblackwheel.prt.zip
Part
Spring(2).jpg
spring.asm.zip
Part
Spring.jpg
No download available.

Assembly Procedure

Assembly Difficulty Levels

Table 1
Difficulty Level Meaning
Very Easy An average person would have little or no difficulty doing this task.
Easy An average person would likely need some experience taking objects apart for this type of task to go smoothly.
Medium An average person would need some mechanical experience, such as backing out extremely tightened screws in small places.
Hard Not likely an average person could accomplish this task without breaking parts.
Very Hard An average person would be incapable of preforming this task.





Assembly Steps

Table 2
Step # Process Tools Used Difficulty
1 Place white spring in sprocket. None Medium
2 Place sprocket into slot into the back of the interior body right over the lens holder. None Medium
3 The camshaft is placed in on the top which locks the sprocket in place. None Easy
4 Place spring for shutter lever on knob on camera. None Easy
5 Intertwine the film advance lock between camshaft and spring. None Medium
6 Push brass pin on top to hold it in place. None Hard
7 Put film advance gear on interior body. None Medium
8 Place Frame counter on top of the camshaft while overlapping the film advance gear. Screwdriver Medium
9 Push pin on top of frame counter to keep it in place. Screwdriver Medium
10 Place washer & lens to into the hold on the lens holder. None Medium
11 Snap lens cap over the lens & washer to hold it in place. None Medium
12 Put shutter spring & camera shutter on middle front of the interior body. None Hard
13 Put the lens holder over these two parts, lock it in place. None Medium
14 Slide in film spindle on the interior body and lock it in place. None Medium
15 Place circuit board on interior body, screw it into place. Screwdriver Medium
16 Insert battery into slot. None Very Easy
17 Slide film into place. None Easy
18 Attach back cover into place. None Easy
19 Lock in front cover. None Easy
20 Slide in bottom film cover. None Easy
21 Screw in last screw. Screwdriver easy

Post Assembly

Observations

When the camera is put back together the film now rattles around in the back since it is not wound around the camera like it was originally. This is completely normal for any disposable camera. We believe that the camera would work again if there was a way to rewind the film inside of the camera housing without exposing or ruining the film roll. However, this is quite difficult as a result of the film being wound inside the camera. Since it is a disposable, it is meant to be used once and not to be used again. Therefore there is no reason at all to make the camera capable of accepting new film easily.

Recommendations

Mirror on outside of Camera


Mirror.jpg


We believe that placing a mirror on the outside of the camera near the lens would be an easy way to improve the product and attract more customers. A small mirror would allow those trying to take pictures of themselves to preview the picture before it was taken. This will cause the customer less frustration and allow them to take more accurate pictures. It is a minor improvement that is relatively cheap and would not require an extreme amount of engineering analysis to work into the product.


Removal of thumb grip


Thumbgrip.jpg

The thumb grip in and of itself is a very good idea. It complements the users grip and allows them to take steadier pictures. However, the thumb grip is actually covered by the cardboard on the outside of the camera. As a result the consumer cannot actually use the grip. However, it is believed that this type of exterior is used for several different models. It would make sense for Polaroid to not change the design because it would actually cost them more to re-engineer a new exterior. However, if the company actually wants a thumb grip, they should design a way for the cardboard to be cut so the thumb grip could be used.


Other

We have no other recommendations, since most of the product is plastic that can be reused over again.

Conclusion

This Polaroid 35 mm Disposable camera is extremely well made. It is durable, safe, efficient, portable, and most importantly disposable. We only had minor recommendations because the product is relatively simple. It does it's job, and it does it well.

Reverse engineering allowed us to learn a lot of the mechanical devices of a disposable camera, and how thing are designed to work together.