Group 12 - Fuji Waterproof Camera
We were given a reverse engineering project whereby we had to disassemble a product and understand and work out how the product functions. For our little project we were given the task to dismantle a disposable waterproof camera. Here’s an overview of what we undertook.
Disassembling the camera was relatively simple and it required minimal tools. Most of the tools used were very basic ones such as screwdrivers and knives as the product was mostly assembled using snap on fits or glued together in some instances. After disassembly we proceeded to catalogue and document each part of our camera. During this process we looked at how each part was made, it’s functions and how the camera came together with the integration of all these small parts.
The reassembly process of the camera was also straightforward with some hiccups along the way. As the camera is designed for single use only, some of the parts broke during disassembly and we think that this was done to prevent the consumer to reuse the camera with another roll of film. We also came up with a few minor suggestions on how to improve the product further. For one we could put a little box in the viewfinder to show the user which parts of the picture will be cropped out which would make composing and taking a picture much easier. Another improvement is to make the shutter release lever arm a little more stiffer to prevent accidental shots being taken when the camera is not in used. Overall we had a pretty successful project, we had met our goals that we were given at the initial stages of the project.
The Fuji Waterproof Disposable Camera is a product designed to be user friendly, simple and easy to use under harsh conditions. The camera works just like any other conventional film camera whereby light enters thru the main lens and the image taken gets exposed on a film. The only difference between a normal camera and the disposable camera is that the latter has no power source and all of the parts work mechanically. The other distinct difference is that it also has waterproofing capabilities up to a specfied depth. The disposable camera is design for a single use with the film providing 27 exposures per use. The design of the whole system makes the camera robust and tough for outdoor activities.
- Chung, Jun Young (After Disassembly, Wiki Page)
- Deyo, Raymond (Wiki Page Master & Group Leader)
- Gomez, Adrian (Wiki Page Master)
- Heath, Vatsana (Disassembly,CAD Work)
- Lewczyk, Tomasz (Assembly)
The Fuji Waterproof disposable Camera, is waterproof which allows the user to take pictures under water. Just like any other film camera, when the shutter is open, light enters the lens and it is exposed to the film where the image is recorded. Electrical energy is charged and than released as a light form in order to operate the flash. Mechanical energy opens the shutter for a set period of time.
When a picture is taken, it gives a "click" sound and the shutter quickly opens and re –shuts back to its original position. After each snapshot, it is required to advance the film in order to take another photo. The process is than repeated untill the spindle reaches the end of the film.
It is predicted that it consists of at least 30 parts other then the cases. Also, the materials are made out of metal for springs, plastic for the majority of the components, glass for the lenses and possibly rubber for interior seals. So to summarise there are 30 components, consisting of 4 different materials.
After Disassembly and Table for Parts
The table belows lists the Bill of Materials for the disposable camera:
|Part #||Part Name||# Req'd||Mat'l||Reason of Material Used||Manufacturing Process||Design Function||Image|
|1||Paper Case||1||Paper||Fairly cheap, easy to produce, More durable and stronger than plastic||Printing and Folding||Rectangular shaped boxes can easily be "stacked" on top of each other to form rows and columns. This makes it convenient for storage and transportation of the product.|
|2||Plastic Packing||1||Plastic||Very cheap and easily produced into mass quantities||-||Outer protective "shell" which protects the product before it is purchased.|
|3||Waterproof Strap||1||Plastic||Light and Waterproof||Plastic Shaping||Enables the user to hold the product in a convenient manner.|
|4||Front Waterproof Cover||1||Plastic||Light, Waterpoof||Injection Molding||Middle is partially trasparent to allow the user to see a few of the major components & for aesthetics.|
|5||Back Waterproof Cover||1||Plastic||Light, Waterprrof||Injection Molding||transparent to view the details|
|6||Waterproof Seal||1||Rubber||Best material since it has low production price yet provides more than enough force to tighten things together.||Injection Molding||Keep a tight seal and integral in waterproofing|
|7||Shutter Release Arm||1||Plastic||Cheap and easy to produce since plastic is very easy to be used in Injection Molding||Injection Molding||Ease of use with a single finger|
|8||Film Spindle||1||ABS Plastic||Cheap and easy to produce||Injection Molding||Spokes are there to advance the film|
|9||Shutter Release Clip||1||Plastic||Cheap and easy to produce||Injection Molding||-|
|10||Shutter Release Seal||1||Rubber||Seals and insulates well after tightened||Injection Molding||-|
|11||Shutter Release Spring||1||Steel||Gives strong enough force to function as a spring when shaped.||Steel Shaping||Provides a counter force when needed to release the shutter|
|12||Outer Film Spindle||1||Plastic||Easy to mold to produce massive amount of same part||Injection Molding||Acts as another clip in holding the camera shells together|
|13||Outer Film Spindle Seal||1||Rubber||Seals very well after tightened||Injection Molding||-|
|14||Front Chasis||1||Plastic||maintains its own shape well, fair weight and durability||Injection Molding||Gives the camera the shape and major components sit on the chasis|
|15||Camera Lens||1||Plastic||One of the best material to make transparent parts, less easy to be broken compared to glass, light weight.||Injection Molding||Transparent and curved so that it refracts light|
|16||Front Viewfinder||1||Plastic||One of the best material to make transparent parts, durable & light weight.||Injection Molding||-|
|17||Back Viewfinder||1||Plastic||One of the best material to make transparent parts, durable & light weight.||Injection Molding||-|
|18||Magnifier||1||Plastic||One of the best material to make transparent parts, less easy to be broken compared to glass, light weight.||Injection Molding||Maginfies the object to make picture composition easier|
|19||Frame Counter||1||Plastic||Provides good grip with high enough friction force when spun with fingers. (Not slippery)||Injection Molding||Gives user feedback as tohow many exposures left|
|20||Top Film Advance Lock||1||Plastic||Stretches fair amount in order to open and shut. Also creates good "clicking" noise when shut||Injection Molding||Slightly intricate design to keep a few internal parts together|
|21||Film Advance Lock Spring||1||Steel||Has strong spring constant when shaped into springs which will provide large force to maintain lock||Steel Shaping||Designed to keep the film from going forward without a picture being taken first|
|22||Bottom Film Advance Lock||1||Plastic||Stretches fair amount in order to open and shut. Also creates good "clicking" noise when shut||Injection Molding||Intircate design to keep a strong hold on internal components|
|23||Film Advance Gear Trigger||1||Plastic||Easy to be molded, easy and cheap to mass produce||Injection Molding||It must fit into Film Advance gear|
|24||Film Advance Gear||1||Plastic||Easy to be molded, easy and cheap to mass produce||Injection Molding||Has teeth so that it creates good friction so that is easy for the users to turn the dial|
|25||Lens Mount||1||Plastic||Easy to be molded, easy and cheap to mass produce||Injection Molding||Once lens is mounted, it protects the lens|
|26||Shutter Cover Spring||1||Steel||Functions as a spring very well after shaped into it||Steel Shaping||Must be responsive towards user inputs to release and close the shutter|
|27||Shutter Cover||1||Plastic||Waterproof.||Injection Molding||Controls exposure of the lens to light|
|28||Back Inner Shell||1||Plastic||has good durability and easy for users to notify that it's closed by giving off good "click" sound||Injection Molding||Must keep every component and Film in their position.|
|29||Inner Film Spindle||1||Plastic||Easy to be molded, easy and cheap to mass produce||Injection Molding||Has teeth so that it makes sure it spins along with film|
|30||Film||1||Various Materials||-||Various Process||Rolled into a cylinder so that maximum surface area is kept while consuming least volume|
|31||Inner Film Spindle||1||Plastic||Easy to be molded, easy and cheap to mass produce||Injection Molding||Has teeth so that it makes sure it spins along with film|
|32||Tools used for Disassembly||1||Misc||-||-||-|
1.Front Inner Shell was put on the table with hand (very easy)
2.Film, with Inner Film Spindle, was put in the Front Inner Shell with hand (very easy)
3.Film Advance Lock Spring was attached between Top Film Advance Lock with hand and Bottom Film Advance Lock. (easy)
4.Film Advance Gear Trigger was put together with Film Advance Gear with hand (easy) Shutter Cover Spring was assembled with Shutter Cover and was placed in the shell with hand (easy)
5.Lens mount was attached to shell by using flat head screw driver (easy)
6.Magnifier was attached to shell by using flat head screw driver (easy)
7.Shutter Housing was attached to shell by using flat head screw driver (easy)
8.Front View Finder, Camera lens, Back View Finder, Frame Counter were put in the shell by hand (easy)
9.Back Inner Shell was used to close the shell by using flat head screw driver and was sealed (hard)
10.Outer Film Spindle was put back on the inner shell by using Pliers and hand. (hard)
11.Outer Film Spindle Seal was put on Outer Film Spindle by using flat head screw driver (easy)
12.Shutter Release Arm, Shutter Release Clip, Shutter Release Seal and Shutter Release Spring were assembled together by using hand and the assembly was put together with inner shell (easy)
13.Front Chassis was put on the shell by using flat head screw driver (medium)
14.Water proof seal was placed inside the front and back waterproof cover (hard)
15.Front and Back Water proof cover was put back to the assembly by using flat head screw driver (medium)
16.Water Proof strap was put on with hand (easy)
The camera was convenient and easy to use with a few changes which could have enhanced the product.
1. The Front Waterproof cover has a rubber attachment grip on the right hand side of the camera. The purpose for this, is to avoid slippage. Common practice while taking snapshots, is to hold the camera with two hands and not one. It would be a reasonable improvement to have rubber grips on both sides of this part.
2. The Viewfinder allows the user to see what snapshot is going to take place before the Shutter Release Arm is executed. Unfortunately, the physical photo when developed, is not consistent with what the viewfinder was showing the user before the picture was taken.(according to Amazon.com's Product Evaluation) Inscribing the virtual photo to the viewfinder would give the user more feedback before taking the snapshot.
3. The Shutter Release Arm controls the shutter to open, which allows the film to be exposed in the form of a picture. Unfortunately, this part is very long and can easily be executed unintentionally by the person taking pictures. The geometry of the Shutter Release Arm could be modified to elimiate this error. Changing the length and the curvature allowing the part to be closer to the camera is ideal.
CAD drawings and Assembly animation clips are uploaded below as separate files.