Folding metal back plate
AssigneeDarwin Precisions Corporation
InventorChing-Wen TAO
Life of this patent
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Abstract
A folding metal back plate includes a first plate portion, a second plate portion, and a folding plate portion connected to the first plate portion and the second plate portion. The folding plate portion has two first folding areas respectively disposed close to the first plate portion and the second plate portion, and a second folding area formed between the two first folding areas. The first folding area has multiple rows of spaced first openings. The second folding area has multiple rows of spaced second openings. Each first folding area constitutes a first unfolding length. The second folding area constitutes a second unfolding length. The first unfolding length of the first folding area is 0.2 to 0.5 times the second unfolding length of the second folding area.
Claims10
A folding metal back plate, comprising:
- a first plate portion;
- a second plate portion;
- and
- a folding plate portion connected to said first plate portion and said second plate portion, said folding plate portion comprising two first folding areas respectively disposed close to said first plate portion and said second plate portion and a second folding area formed between said two first folding areas, said first folding area comprising multiple rows of spaced first openings, said second folding area comprising multiple rows of spaced second openings, each said first folding area constituting a first unfolding length, said second folding area constituting a second unfolding length, said first unfolding length of said first folding area being 0.2 to 0.5 times said second unfolding length of said second folding area.
The folding metal back plate as claimed in claim. 1, wherein the ratio of all said first openings in said first folding area to the total area of said first folding area constitutes a first opening ratio;
- the ratio of all said second openings in said second folding area to the total area of said second folding area constitutes a second opening ratio;
- said first opening ratio of said first folding area is greater than said second opening ratio of said second folding area by 25% to 36%.
Dependencies are inferred from the claim text.