Subject: Discussion Regarding The Structure of Door Latch Lock

Dear Manushi, U21241

I am writing this email in order to request a meeting regarding the discussion of your requirement of the structure of the door latch lock. Attached below is the drawing showing the exploded view of the door lock mechanical components.

The process of the aforementioned drawing started with dismantling of the lock into 20 different parts which make the internal components of the lock which helps to understand the mechanism of the product. The sheet below comprises the view of a deadbolt lock. A deadbolt lock has both dead and latch type of bolts. This increases the safety provided by it. The drawing is made with a sense so that everyone can understand the assembly of the parts. An isometric bird’s eye view, i.e. drawing seen from the height of a bird’s eyesight and made at an angle of 30 degree, is displayed to optimally see the objects in 3D. The sketch is made in a 1:1 scale making the objects drawn in their original size. The components are therefore measured thoroughly and the sizes are noted down for the final sketch.

The joineries and attachment of parts to each other to complete the mechanism is indicated by dashed lines called axis lines. For instance, the hook fixing in latchbolt is also attached to the cylindrical rivet which connects it to the deadbolt and mounting plate to assist in smooth motion of deadbolt and latch bolt simultaneously. This is shown through the axis lines in the sheet. The parts of the lock are made out of different metals such as brass, coated aluminum and rust-free coated steel. The different components are indicated using different line weights which are the way of showing contrast using different thickness and darkness of lines in a drawing. Darker and broader lines are used to emphasize the important parts like the main lock body and the closing cap and the secondary parts like face plate and side plate are mentioned in a lighter tone. The various metals are also differentiated through line weights such as the compression spring and the mounting spring which are of black color coated steel are displayed in a heavy lineweight while the steel components like the collar

plate are shown in lighter lineweight to display and showcase the shining quality of steel. Lastly, the drawing sheet is finished off by labeling all the internal parts with a fine line pen for one’s convenience to understand the assembly of each one of them.

I hope the drawing was according to your needs for the understanding of the structure of the lock. You can suggest if any specifications need change. I await your reply.

Thanking you in advance,

Hani