Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C1/00—Assemblies of lenses with bridges or browbars
  • G02C1/06—Bridge or browbar secured to or integral with closed rigid rims for the lenses
  • G02C1/08—Bridge or browbar secured to or integral with closed rigid rims for the lenses the rims being tranversely split and provided with securing means
• • G—PHYSICS
  • G02—OPTICS
  • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
  • G02C5/00—Constructions of non-optical parts

Definitions

• the present invention relates to an important improvement on an eyeglass frame in which a latching mechanism is applied to the eyewire portion of the frame to permit the insertion, removal or replacement of the lenses in the frame .
• the present invention provides a much more secure closure to retain the lenses in the frame , allows slightly over cut lenses to be inserted and retained, and closes in such a way that the frame will, not accidentally open .
• US Patent 6273564 describes an eyeglass frame for the removal and insertion of lenses that provides for a portion of the frame removably coupled to the body of the frame to permit the insertion, removal or replacement of the lenses in the frame . It would be most desirable to provide for a secure closure of the frame eyewire so that the frame portion which could be opened is able to accept lenses that have been cut slightly over-size, retain the lenses securely, prevent accidental release, yet still be able to be easily opened with readily available tools . The present invention provides for such a feature .
• the principal obj ect of the present invention provides a modification of the design of US Patent 6273564 in which a more secure closure is provided that will accept oversized lenses and not accidentally open which could be integrated into the current design in the aforementioned patent .
• This invention importantly provides for utilizing a cam arm made from a suitably elastic metal with a wave-shaped or curved portion adapted to fit on top of or within a recess on the top of the upper portion of the eyewire closure blocks so that the frame eyewire is securely closed in order to retain the lenses .
• the wave shaped cam arm when made with suitably elastic metal , can accept lenses that have been cut slightly over-size in terms of having a longer circumference than the inside of the eyewire .
• the cam arm When closed, the cam arm will exert a constant force to hold the upper and lower closure blocks together, which provides for a more secure fit .
• the design will prevent accidental release, yet can be easily opened using readily available tools .
• fewer parts are required, and standard manufacturing processes can be used .
• Fig . 1 shows a partial front view of the latching mechanism of the frame
• Fig . 2 shows a partial rear view of the latching mechanism of the partial sectional view in a closed position
• Fig . 3 shows a sectional view of the latching mechanism of the frame taken along the lines 3-3 of FIG . 2 ;
• Fig . 4 shows an elevated rear view taken along lines 4- 4 of Fig . 3 showing the cam arm is closed along with the closed upper and lower closure blocks of the frame ;
• Fig . 5 is a sectional view taken along lines 5-5 of Fig . 3 showing the cam arm and hinge pin, and the recesses in the upper and lower closure blocks ;
• Fig . 6 shows a top view taken along lines 6-6 of Fig . 4 showing the frame in the closed position
• Fig . 7 is a sectional view taken along lines 7-7 of Fig . 5 of the latching mechanism of the frame shown from the opposite side of Fig . 3 ;
• Fig . 8 is a rear view of the latching mechanism of the frame in an open position showing the gap created in the closure blocks and eyewire ;
• Fig . 9 is a sectional view along lines 9-9 of Fig . 8 in the open position;
• Fig . 10 is a top view along lines 10-10 of Fig . 8 in the open position showing the top of the hinge pin and the recess in the top closure block;
• Fig . 11 is an exploded view of the latching mechanism of the frame .
• a latching cam lock 516 is provided for an eyeglass frame .
• the cam lock 616 has a top cam arm portion 813 that is curved or wave-shaped to fit into a recess in the top of the upper closure block 805.
• Fig . 7 shows the same view as Fig .3 but from the other side .
• the cam arm 612 is made of a suitable elastic material such as spring steel, the purpose of which is by providing a cam arm with the aforementioned wave-shaped portion and made of a suitable elastic material enables the cam arm 612 to latch even if the lens circumference is slightly larger than ideal . This enables the lenses to be over-cut up to 0.25mm
• the suitable elastic material for the cam arm 612 is strong enough to hold the cam arm 612 in place once it has been securely set, but enables some degree of give in the event that the lens is over-cut .
• Spring steel is a good material to use for this application, although other suitably elastic material can work .
• the elasticity in the cam arm 612 also provides for clamping force to keep the closure blocks 805 , 812 securely together .
• the hinge pin is a non-threaded pin 617 ( see Figs . 5 , and 7 ) to eliminate the need for a threaded post . This enables a reduction in the overall height of the design, and insures proper alignment of the cam arm 612 and the groove cut into the back of the upper and lower closure blocks , 805 and 810 , respectively .
• Fig . 8 shows a portion of the frame in the open position .
• Fig . 9 shows the cam arm 612 rotating from the open position ( solid lines ) toward the closed position (dotted lines ) .
• Fig . 10 is a top view of the hinge pin .
• Fig . 11 is an exploded view showing the mechanism for the present invention .

Landscapes

• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Ophthalmology & Optometry (AREA)
• Optics & Photonics (AREA)
• Eyeglasses (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

ID=34960371

Family Applications (1)

Country Status (7)

Families Citing this family (19)

Citations (6)

Family Cites Families (1)

• 2005
  • 2005-02-03 WO PCT/US2005/003276 patent/WO2006083247A1/en not_active Ceased
  • 2005-02-03 US US10/544,692 patent/US7163289B2/en not_active Expired - Fee Related
  • 2005-02-03 CN CNA2005800005413A patent/CN1934487A/zh active Pending
  • 2005-02-03 DE DE112005000036T patent/DE112005000036T5/de not_active Ceased
  • 2005-02-03 CA CA002538901A patent/CA2538901C/en not_active Expired - Fee Related
• 2006
  • 2006-02-01 IT IT000051A patent/ITRM20060051A1/it unknown
  • 2006-02-07 GB GB0602442A patent/GB2422910B/en not_active Expired - Fee Related

Patent Citations (6)

Also Published As

Similar Documents

Legal Events