Clamp for testing physical dimension of soft contact lens
By designing a fixture including a carrier plate and positioning projections, the problems of insufficient physical dimensions of test soft contact lenses and unstable position of soft mirrors in the prior art are solved, and a high-accurate soft mirror size measurement is achieved.
Patent Information
- Application Number
- CN202421683236.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The fixtures used in the prior art to test the physical size of soft contact lenses are not accurate enough, there are errors, and the position of the soft mirror is unstable during testing in solution, resulting in multiple measurement errors.
A fixture including a carrier plate and a positioning protrusion is designed. The positioning protrusion is an annular shape and there is an internal gap. The innermost plane of the gap and the axis of the soft mirror to be tested can be focused on the same plane. It can simultaneously take pictures of the upper surface of the fixture and the apex of the soft mirror, accurately measure the size of the soft mirror, and frame the soft mirror by positioning protrusion to prevent movement.
It improves the accuracy of testing the physical dimensions of soft contact lenses, reduces errors caused by inconsistent measurement positions for multiple times, and enables accurate measurement of soft contact lenses without destroying them.
Smart Images
Figure CN222812344U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of soft lens testing, in particular to a fixture for testing the physical dimensions of soft contact lenses. Background Art
[0002] With the continuous expansion of the application scope of soft hydrophilic contact lenses and the surge in the number of wearers, the demand for soft contact lenses by domestic patients is also increasing day by day. The high water content of soft lenses determines that they are prone to rapid water loss and deformation in the air. Therefore, the general testing environment of soft lenses is liquid. The fixture in the prior art is in the form of a slide. Usually, the soft lens is placed in the solution and the side of the soft lens is photographed with an imager to extract the distance between the contact surface of the fixture and the soft lens and the highest point of the soft lens when viewed from the side. Figure 4 The figure shows the schematic diagram of the structure of a square quick clamp in the prior art. The shape of this clamp fits the test slot, the middle is hollowed out, there is a carrier plate below to place the soft contact lens, and the four sides are hollowed out to facilitate the test of the physical size data of the soft lens. However, the test is not accurate enough and there are errors.
[0003] The physical size test and accuracy of soft contact lenses are very important. Compared with the test in traditional solution, the edge of the square quick fixture and the central axis of the soft contact lens are difficult to be tangent to the same plane, which makes it difficult for the zoom camera to clearly capture the upper surface of the fixture and the vertex of the soft lens at the same time, resulting in errors in the physical size test. In addition, the soft contact lens is prone to position floating when placed in the test solution, which is unstable for multiple tests and prone to deviations. Therefore, it is urgent to develop a fixture for testing the physical size of soft contact lenses to solve the above technical problems.
[0004] In view of this, the present utility model is proposed. Utility Model Content
[0005] The purpose of the utility model is to provide a fixture for testing the physical dimensions of soft contact lenses, which can simultaneously photograph the upper surface of the quick fixture and the apex of the soft lens without damaging the soft lens, accurately measure the soft lens data, and locate the position of the soft lens in a solution, thereby avoiding errors caused by inconsistent positions in multiple measurements, improving test accuracy, having broad application prospects, and being conducive to popularization and application.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a fixture for testing the physical dimensions of soft contact lenses, including a carrier plate, a positioning protrusion is provided on the carrier plate, the positioning protrusion is annular and tangent to one side of the carrier plate, the interior of the positioning protrusion is used to place the soft lens to be tested, so as to frame the moving direction of the soft lens to be tested and prevent the soft lens to be tested from moving, a notch is extended to the inside of the positioning protrusion at the tangent point between the positioning protrusion and the carrier plate, the innermost side of the notch is a plane perpendicular to the carrier plate, the plane coincides with the center line of the positioning protrusion, and during testing, the innermost plane of the notch and the axis of the soft lens to be tested can be focused on the same plane.
[0007] Preferably, the outer end of the notch is rectangular and extends toward the center of the positioning protrusion in a bowl shape.
[0008] Preferably, a notch is provided on the positioning protrusion on the opposite side of the notch. The notch facilitates the removal of the soft lens to be tested. This position is a non-optical area relative to the position where the soft lens is placed, and the soft lens can be clamped with tweezers at the notch. In addition, the fixture can be rotated 180° around the central axis before testing, and at this time, the notch can provide convenience for observing the edge of the soft lens.
[0009] Preferably, the inner diameter of the positioning protrusion matches the diameter of the soft lens to be tested.
[0010] Preferably, the carrier plate is rectangular.
[0011] Preferably, the fixture is an axisymmetric shape.
[0012] Preferably, the shape and size of the carrier plate match the test slot of the intraocular lens imager.
[0013] The utility model provides a fixture for testing the physical dimensions of a soft contact lens, which has the following beneficial effects.
[0014] 1. The utility model adds a positioning protrusion as a positioning structure to locate the position of the soft lens to be tested, which can effectively improve the accuracy of multiple samples and multiple tests.
[0015] 2. The utility model has a side notch design, and the innermost plane of the notch and the axis of the soft lens to be tested can be focused on the same plane, so that the upper surface of the fixture and the vertex of the soft lens can be photographed at the same time, the size of the soft lens can be accurately measured, and the test accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A top view of a fixture for testing the physical dimensions of a soft contact lens provided by the utility model;
[0017] Figure 2 A front view of a fixture for testing the physical dimensions of a soft contact lens provided by the utility model;
[0018] Figure 3 A diagram showing the use status of a fixture for testing the physical dimensions of a soft contact lens provided by the utility model;
[0019] Figure 4 It is a structural schematic diagram of a square quick clamp in the prior art.
[0020] In the figure:
[0021] 1. Carrier board 2. Positioning protrusion 3. Notch 4. Innermost side of notch 5. Soft lens to be tested 6. Notch DETAILED DESCRIPTION
[0022] The present invention will be further described below in conjunction with specific embodiments and drawings to help understand the content of the present invention.
[0023] like Figure 1-Figure 2 As shown, they are respectively a top view and a front view of a fixture for testing the physical dimensions of a soft contact lens provided by the utility model. The fixture for testing the physical dimensions of a soft contact lens is an axisymmetric figure, comprising a carrier plate 1, the carrier plate 1 being rectangular, and the shape and size of the carrier plate 1 matching the test slot of an intraocular lens imager. A positioning protrusion 2 is provided on the carrier plate 1, the positioning protrusion 2 is annular, and is tangent to one side of the carrier plate 1. The interior of the positioning protrusion 2 is used to place a soft lens 5 to be tested, so as to frame the moving direction of the soft lens 5 to be tested and prevent the soft lens 5 to be tested from moving. The inner diameter of the positioning protrusion 2 matches the diameter of the soft lens 5 to be tested. A notch 3 is provided at the tangent point between the positioning protrusion 2 and the carrier plate 1, and the innermost side 4 of the notch is a plane perpendicular to the carrier plate 1, and the plane coincides with the center line of the positioning protrusion 2. During testing, the innermost side 4 of the notch and the axis of the soft lens 5 to be tested can be focused on the same plane. The outer end of the notch 3 is rectangular and extends to the center of the positioning protrusion 2 in a bowl shape. A notch 6 is provided on the positioning protrusion 2 on the opposite side of the notch 3. The notch 6 facilitates the removal of the soft lens 5 to be tested. This position is a non-optical area relative to the position where the soft lens is placed. The soft lens can be clamped with tweezers at this notch 6. In addition, the fixture can be rotated 180° around the central axis for testing. At this time, the notch 6 can provide convenience for observing the edge of the soft lens.
[0024] The working principle of the utility model is:
[0025] First, pour a proper amount of water into the test slot of the intraocular lens imager, then fix the fixture of the utility model in the test slot, and then place the soft lens 5 to be tested upside down in the positioning protrusion 2 of the fixture, and measure the size of the soft lens 5 to be tested by the intraocular lens imager. Figure 3 The figure shows a use state diagram of a fixture for testing the physical dimensions of a soft contact lens provided by the utility model.
[0026] When the fixture in the prior art is used for testing in a solution, the highest point and the lowest point of the soft lens 5 to be tested are often not on the same plane, so it is difficult to see clearly, resulting in inaccurate testing in the solution. The present invention opens a notch 3 on the fixture so that the position of the lowest point of the soft lens 5 to be tested is reflected on the fixture, thereby avoiding the test of physically damaging the soft lens 5 to be tested. The utility model adds a positioning protrusion 2 as a positioning structure to position the soft lens 5 to be tested, which can effectively improve the accuracy of multiple samples and multiple tests. The utility model has a side notch 3 design, and the innermost plane 4 of the notch and the axis of the soft lens 5 to be tested can be focused on the same plane, so that the upper surface of the fixture and the vertex of the soft lens can be photographed at the same time, and the size of the soft lens can be accurately measured, thereby improving the accuracy of the test.
[0027] This article uses specific examples to explain the concept of the utility model in detail, and the description of the above embodiments is only used to help understand the core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, any obvious modifications, equivalent substitutions or other improvements made without departing from the concept of the utility model should be included in the scope of protection of the utility model.
Claims
1. A fixture for testing the physical dimensions of soft contact lenses, characterized in that: The invention comprises a carrier plate, on which a positioning protrusion is provided, the positioning protrusion is annular and tangent to one side of the carrier plate, the interior of the positioning protrusion is used to place the soft lens to be tested, a notch is provided at the tangent point between the positioning protrusion and the carrier plate and extends to the inside of the positioning protrusion, the innermost side of the notch is a plane perpendicular to the carrier plate, the plane coincides with the center line of the positioning protrusion, and during testing, the innermost plane of the notch and the axis of the soft lens to be tested can be focused on the same plane.
2. A fixture for testing the physical dimensions of a soft contact lens according to claim 1, characterized in that: The outer end of the notch is rectangular and extends toward the center of the positioning protrusion to form a bowl shape.
3. A fixture for testing the physical dimensions of a soft contact lens according to claim 2, characterized in that: A notch is arranged on the positioning protrusion on the opposite side of the notch.
4. A fixture for testing the physical dimensions of a soft contact lens according to claim 3, characterized in that: The inner diameter of the positioning protrusion matches the diameter of the soft lens to be tested.
5. A fixture for testing the physical dimensions of a soft contact lens according to claim 4, characterized in that: The carrier plate shown is rectangular.
6. A fixture for testing the physical dimensions of a soft contact lens according to claim 5, characterized in that: The fixture is an axisymmetric shape.
7. A fixture for testing the physical dimensions of a soft contact lens according to claim 6, characterized in that: The shape and size of the carrier plate match the test slot of the intraocular lens imager.