Prescription nose pad combination structure

Abstract

This invention discloses a nose pad assembly structure for selectively attaching to the outside of existing eyeglasses or wearing directly. It includes a frame and a detachable, snap-on nose pad. The inner side of the bridge of the frame has a recessed groove, allowing for seamless attachment to existing eyeglasses after the nose pad is removed. The snap-on nose pad includes a nose pad body, a base protrusion, and eccentrically arranged interlocking latches. During assembly, the base protrusion restricts displacement in the first and second directions, and the latches restrict displacement in the third direction, forming a stable three-dimensional restraint. Furthermore, the frame has a demolding channel communicating with the groove, and a second end with a guide slope corresponding to the latch allows external tools to be inserted to push and demold. The frame also features a deep mounting groove with a high-friction structure, ensuring a secure fit and extending the frame's lifespan, achieving a dual-use functionality.

Claims

1. A nose pad assembly structure for selectively fitting onto the outside of an existing pair of eyeglasses or for direct wear by a user, defining a first direction, a second direction, and a third direction perpendicular to each other, and the assembly structure comprising: a frame including two lens portions and a bridge connecting the two lens portions, the bridge having a recessed groove on its inner side; and a snap-on nose pad detachably attached to the frame, the snap-on nose pad including a nose pad body, a base protrusion extending from the top of the nose pad body along the second direction, and a latch disposed on the base protrusion; wherein... When the snap-on nose pad is combined with the eyeglass frame, the base protrusion is at least partially accommodated in the groove to limit the displacement of the snap-on nose pad in the first and second directions; the latch engages inside the groove to limit the displacement of the snap-on nose pad in the third direction.

2. The nose bridge assembly structure as described in claim 1, wherein, The tenon extends along the first direction and is eccentrically intersecting with the base protrusion, such that the central axis of the tenon does not coincide with the central reference surface of the base protrusion, and the tenon has a first end protruding from one side of the contour of the base protrusion, and a second end protruding from the other side of the contour of the base protrusion and having a length less than the first end.

3. The nose pad assembly structure as described in claim 2, wherein, The first end is provided with a first guide slope, which is used to provide deformation clearance when the frame is disassembled under normal force along the third direction, so that the tenon can disengage from the groove.

4. The nose bridge assembly structure as described in claim 2, wherein, The central beam is further provided with a mold release channel communicating with the groove, and the position of the second end corresponds to the mold release channel.

5. The nose pad assembly structure as described in claim 4, wherein, The second end is provided with a second guide slope, which allows an external tool to be inserted through the ejection channel and push the second guide slope when the snap-on nose pad is stuck, forcing the second end to displace and disengage the latch from the groove.

6. The nose bridge assembly structure as described in claim 1, wherein, The frame material is harder than the material of the snap-on nose pad, so that the mechanical wear from daily disassembly and reassembly along the third direction is concentrated on the snap-on nose pad.

7. The nose bridge assembly structure as described in claim 1, wherein, The groove does not protrude from the inner side of the bridge, so that when the snap-on nose pad is removed from the frame, the inner side of the bridge maintains a flat space for seamless connection over the existing glasses along the second direction.

8. The nose pad assembly structure as described in claim 7, wherein, The top edge and side edges of the frame extend further toward the wearing side, together forming a covering extension wall.

9. The nose bridge assembly structure as described in claim 8, wherein, The extended wall covering, together with the inner side of the frame, defines a mounting groove.

10. The nose pad assembly structure as described in claim 9, wherein, The mounting groove is designed to be hung from top to bottom along the second direction on the upper edge of the existing eyeglass frame to form a gravity-locking structure. The inner surface of the covering extension wall is further provided with a high-friction structure selected from at least one of the following: surface texture structure, microstructure protrusion array, and anti-slip material layer.

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