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High Endurance Rotation Stopper Mechanism of Hinge

IP.com Disclosure Number: IPCOM000014138D
Original Publication Date: 2000-Apr-01
Included in the Prior Art Database: 2003-Jun-19
Document File: 2 page(s) / 33K

IBM

Abstract

Disclosed is the high endurance rotation stopper mechanism of hinge by half-punch construction. When using sheet metal construction, popular stopper mechanism is to add the other piece of material. But this makes the production cost higher than one-piece construction. Most popular one-piece stopper mechanism is bending the sheet metal, but this causes the wider space requirement.

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High Endurance Rotation Stopper Mechanism of Hinge

Disclosed is the high endurance rotation stopper mechanism of hinge by half-punch
construction.

When using sheet metal construction, popular stopper
mechanism is to add the other piece of material.

But this makes the production cost higher than one-piece
construction.

Most popular one-piece stopper mechanism is bending the
sheet metal, but this causes the wider space requirement.

This mechanism provides one piece construction & narrows
space requirement.

Figure 1 shows the assembly image, and 2 stopper mechanisms
are shown as half-punch of sheet metal.

Figure 2 shows the detail dimensions of half-punch of sheet
metal.

Two half-punch has 4mm Diameter and 1.8 mm depth.
The strength of each half-punch is calculated by the

The Formula is as follows.

F = (Allowable Shearing Stress of Steel)x(Sectional
Area of Cylinder)

2= 4.8(Kg/mm)x3.14x2(mm)2 =60Kg

In case of sheet metal bending mechanism, the strength of
bending sheet metal is calculated by the bending load of
cantilever.

The Formula is as follows.

F = (Allowable Bending Stress of Steel)x(Section
Module)/(Bending Length)

2= 6.0(Kg/mm)x4.166(mm3)/3(mm) = 8.3 Kg

4.166 : Section Module of rectangular section "I

2= bxh/6"

b : bending width (4mm),h: sheet metal
thickness (2.5mm)

As the result of above two simulations, half-punch
mechanism has about 7 times strength than bending
mechanism. And about 29mm bending width will be required
for getting the same stren...