Patent ID: 8857980
Filing Date: 2014-10-14
Classification: G02C

Abstract:
1. An automatically stretchable folding spectacle, comprising: a first rim with a first lens, a second rim with a second lens, a first leg and a second leg; characterized in that the width of the end of the first leg connected to the first rim is larger than or equal to the width of the first lens with the shape of the first rim being matched with the shape of the first lens, and the width of the end of the second leg connected to the second rim is larger than or equal to the width of the second lens with the shape of the second rim being matched with the shape of the second lens; the first rim and the first leg are elastically connected via a first elastic member; the second rim and second leg are elastically connected via a second elastic member; and the spectacle further comprising: a middle beam mechanism comprising a first middle beam connection member, a second middle beam connection member, a first extension spring, a second extension spring and a middle member, wherein the first middle beam connection member and the second middle beam connection member are fixed to the first rim and the second rim respectively, and the first middle beam connection member having a free end and the second middle beam connection member having a free end, the tip surfaces of the free ends are flat; a first translot is provided on the first middle beam connection member, and a second translot is provided on the second middle beam connection member, with the first extension spring being disposed inside the first translot, the inner end of the first extension spring and the first middle beam connection member being flexibly connected, and the second extension spring being disposed inside the second translot, the inner end of the second extension spring and the second middle beam connection member being flexibly connected; the middle member is located between the first middle beam connection member and the second middle beam connection member; a first pivoting connected hole and a second pivoting connected hole are provided at the both sides of the middle member, which are perpendicular to the normal of the rim, with a first pivoting connected pin being provided within the first pivoting connected hole, and the outer end of the first extension spring being nested around the first pivoting connected pin; a second pivoting connected pin is provided within the second pivoting connected hole, with the outer end of the second extension spring being nested around the second pivoting connected pin; the upper and lower surfaces of the middle member are flat, and the front and rear surfaces of the middle member are contour; the radius from the first or the second pivoting connected hole to the front or rear surfaces of the middle member is larger than the radius from the first or the second pivoting connected hole to the upper or lower surfaces of the middle member; and two locking mechanisms are provided between the first leg and the second leg laterally and symmetrically, which makes the spectacle capable of keeping a folded state when the spectacle is completely folded.