The present invention relates to a polishing equipment, and in particular, to a high precision rigid gas-permeable contact lens edge curve polishing lathe.
A rigid gas permeable contact lens (RGP lens) is one of the most effective refractive error correction methods and appliances accepted by international optometry and ophthalmology academia and industry at present. With the further development and popularization of the RGP lens, production, polishing and detection equipment related thereof are continuously updated and improved. The high precision rigid gas-permeable contact lens edge curve polishing lathe employed at present mainly has the defect of the imprecise positioning of edge polishing which causes that the lens edge polishing position cannot be quantitatively controlled so as to cause imprecise edge polishing of the needed lens and cause the lens to lack comfort level while being worn on human eyes, thus directly affecting the lens quality.
To overcome the defects in the prior art, the present invention provides lathe for a rigid gas permeable contact lens which solves the problem of the existing polishing lathe that the lens edge polishing position cannot be quantitatively controlled, resulting in reduced polishing positioning precision. Embodiments of the invention can facilitate improvement and correction of lens edge design to make the lens edge polishing meet the comfort requirement, thus improving the lens quality.
The technical solution of the present invention is as follows: a high precision rigid gas-permeable contact lens edge curve polishing lathe, comprising a machine body, wherein the upper end surface of the machine body is provided with a waste liquid tank; the inside of the waste liquid tank is provided with a concave lens holder and a convex lens holder provided in a row and capable of rotating circumferentially; the two sides of the machine body are, respectively, provided with a first crank and a second crank; the inside of the first crank and the inside of the second crank are, respectively, provided with a first rotating spindle and a second rotating spindle provided with a polishing chuck at the front end and capable of rotating circumferentially; the first crank and the second crank rotate along the lateral surface of the machine body such that the polishing chuck can match with the lens held by the concave lens holder and the convex lens holder; a base is provided at the bottom of the machine body; a first support and a second support are, respectively, fixed to two sides of the base. A positioning mechanism is provided on both the first support and the second support. The positioning mechanism comprises an abutting pin aligned with the rotational direction of the first crank and the second crank and a numerical display unit for displaying the position of the abutting pin.
The abutting pin is a measuring pole of a caliper; the numerical display unit comprises scales on the caliper; the measuring pole penetrates through a fixed sleeve of the caliper and is connected with a knob; a periphery of the fixed sleeve is provided with a movable sleeve; the scales are provided on the fixed sleeve and the movable sleeve; the knob is rotatably matched with the measuring pole, the movable sleeve and the fixed sleeve to enable the measuring pole adjustable front and back along the lateral surface of the machine body and form circumferential rotation and axial movement of the movable sleeve.
The top end of the measuring pole is provided with a ball bead in contact with the first crank and the second crank.
The two sides of the base are provided with supporting arms on which the first support and the second support are, respectively, fixed.
The first support and the second support are provided with through holes; the measuring pole penetrates through the through holes and is fixed on the first support and the second support by bolts.
The ball bead is provided with a groove, and the ball bead is connected with the measuring pole via the groove.
The ball bead is manufactured from a copper material.
The base and the supporting arms are integrally provided.
Compared with the prior art, the high precision rigid gas-permeable contact lens edge curve polishing lathe has the beneficial effects as follows: the positioning mechanism of the polishing lathe has a simple mechanical structure and is convenient to use; the contact position between a polishing sponge and a lens (both mounted on a spindle of the polishing lathe) can be precisely ascertained through the numerical readings to achieve quantitative control of the polishing of a lens edge, and making improvement and modification to the design of the lens edge simpler. Thus, lenses meeting customized designs specific to the eyes of a person and achieving optimal comfort can be produced, effectively improving product quality.
In FIG., 1 refers to machine body, 2 refers to waste liquid tank, 3 refers to concave lens holder, 4 refers to convex lens holder, 5 refers to first crank, 6 refers to second crank, 7 refers to first rotating spindle, 8 refers to second rotating spindle, 9 refers to polishing chuck, 10 refers to base, 11 refers to first support, 12 refers to second support, 13 refers to measuring pole, 14 refers to movable sleeve, 15 refers to fixed sleeve, 16 refers to knob, 17 refers to ball bead, 18 refers to supporting aim, 19 refers to through hole, and 20 refers to bolt.
The example embodiments of the present invention will be introduced further with reference to
As illustrated in
As illustrated in
As illustrated in
As illustrated in
The embodiments shall not be considered as a limitation to the present invention. However, any improvement made based on the spirit of the present invention shall fall within the protection scope of the present invention.
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/CN2011/077519 | 7/22/2011 | WO | 00 | 12/31/2013 |