Rapid lens positioning device of contact lens lensometer

Abstract

The utility model relates to the field of optical detection equipment, and further relates to a rapid positioning device for a lens of a contact lens-meter. The utility model relates to a rapid positioning device for a lens of a contact lens-meter. The rapid positioning device comprises a horizontally-placed clamping ring, a first platform located on the side face of the clamping ring and a movable platform located on the first platform and sliding in the vertical direction relative to the first platform. And the mobile platform comprises a contact lens bearing tray which is horizontally arranged. According to the utility model, rapid positioning of the lens to be detected is realized, and the reproducibility of repeated measurement of the diopter of the lens is improved while the detection efficiency of the lensometer is improved.

Description

Technical Field

[0001] This patent relates to the field of optical detection equipment, and further relates to a rapid positioning device for contact lens lensometers. Background Art

[0002] At present, there are various models of equipment for contact lens diopter detection on the domestic market, and their detection accuracies and efficiencies vary. The main criteria for contact lens manufacturers to select lensometers are twofold. One is high detection accuracy, and the other is the ability to achieve rapid detection. Because in the production and inspection process of contact lenses, to ensure product quality, enterprises generally conduct spot checks on the diopters of each batch of contact lenses. Therefore, when selecting a lensometer, the ability to quickly measure refractive power is one of the important indicators for enterprises to choose a lensometer. Currently, the CCQ-600 lensometer is one of the commonly used lensometers by most contact lens enterprises. As shown in the appendix Figure 1 its structure includes: a lensometer body 1, a projection screen 2, a liquid crystal display screen 3, a transmitting head 4, a detection hole 5, a refractive power detection handwheel 6, a lens support 7, and a measurement support 8. The aperture of the detection hole 5 of its commonly used contact lens lensometer is 4.5mm ± 0.5mm. It has high detection accuracy and fast detection speed, so it is highly recognized in the market. However, this lensometer has obvious defects. During the diopter detection process, the center of the optical zone of the lens must be directly opposite the center of the detection hole 5. Therefore, the requirements for operators to manually place the lens are very high, and it is easy to place the lens incorrectly, resulting in detection deviation and affecting the accuracy of the detection results. Therefore, it is necessary to provide a device that can quickly position the lens to be detected 10, improving the detection efficiency of the lensometer and the reproducibility of repeated measurements. Summary of the Invention

[0003] The purpose of this patent is to provide a rapid positioning device for contact lens lensometer lenses, which can quickly adjust the position of the center of the optical zone of the lens to be detected 10 so that it can be quickly adjusted directly above the center of the detection hole 5, improving the detection efficiency of the lens refractive power and the reproducibility of repeated measurements. The technical solution adopted by the present utility model is as follows:

[0004] A rapid positioning device for contact lens lensometer lenses, comprising:

[0005] A horizontally placed clamping ring, a first platform located on the side of the clamping ring, and a moving platform located on the first platform and sliding vertically relative to the first platform; the moving platform includes a horizontally placed contact lens tray.

[0006] Preferably, it further includes: a pair of sliding tracks located on the first platform, a third platform located on the side of the contact lens tray, a pair of sliding track holes located on the third platform, and the sliding tracks and the sliding track holes cooperate with each other to achieve up and down sliding.

[0007] Preferably, it further includes: a second platform located on the side of the snap ring, a rotating shaft horizontally penetrating the second platform, a rotating gear located at the middle position of the rotating shaft, and a rack located in the middle of the third platform and vertically penetrating up and down; the rotating gear meshes with the rack.

[0008] Preferably, it further includes: a vertical through groove located on the side of the second platform and adjacent to the third platform; the through groove accommodates the rotating gear.

[0009] Preferably, it further includes: adjusting handwheels located at both ends of the rotating shaft.

[0010] Preferably, the snap ring includes a circular hole, and the circular hole is nested with the lens support.

[0011] Preferably, there is a star-shaped hole in the middle of the contact lens carrier tray.

[0012] Preferably, the aperture of the star-shaped hole is 8.0 mm ± 0.5 mm.

[0013] On the basis of the existing CCQ-600 contact lens focimeter, the present utility model installs a lens quick positioning device. The snap ring of the device is installed on the measuring seat. During detection, the lens to be detected is buckled upside down on the detection hole. If the center of the optical zone of the lens is not directly opposite to the center of the detection hole, by adjusting and controlling the up and down movement of the moving platform, move up and down repeatedly for several times until the center of the optical zone of the lens is directly opposite to the center of the detection hole. At this time, the contact lens carrier tray is restored to the lowest position to achieve the quick positioning of the lens to be detected. While improving the detection efficiency of the focimeter, it also improves the reproducibility of the repeated measurement of the lens refractive power. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the CCQ-600 focimeter adapted to this patent.

[0015] Figure 2 It is a schematic diagram of the overall structure after assembly of a lens quick positioning device for a contact lens focimeter in an embodiment of this patent.

[0016] Figure 3 It is a schematic structural diagram after assembly of the snap ring, the first platform, the sliding track, the second platform and the rotating shaft in an embodiment of this patent.

[0017] Figure 4 It is a schematic structural diagram after assembly of the third platform, the contact lens carrier tray, the track hole and the rack in an embodiment of this patent.

[0018] Figure 5 It is a schematic structural diagram after assembly of the rotating shaft, the rotating gear and the adjusting handwheel in an embodiment of this patent. Detailed Embodiments

[0019] Figure 1 It is a CCQ-600 lensometer, including a lensometer body 1. There are a projection screen 2, a liquid crystal display screen 3, a transmitting head 4, a detection hole 5, a diopter detection handwheel 6, a lens support 7 and a measurement support 8 on the lensometer body. A rapid positioning device for contact lensometer lenses designed by the present utility model is mainly installed above the measurement support 8 of the CCQ-600 lensometer. The specific structure includes:

[0020] A horizontally placed clamping ring 910, a first platform 909 on the side of the clamping ring, and a moving platform that is placed horizontally on the first platform and slides vertically relative to the first platform; the moving platform includes a horizontally placed contact lens tray 907; the clamping ring includes a circular hole 913, and the circular hole is nested with the lens support; there is a star-shaped hole in the middle of the contact lens tray; the aperture of the star-shaped hole is 8.0 mm ± 0.5 mm;

[0021] A pair of sliding tracks 908 on the first platform, a third platform 906 on the side of the contact lens tray, a pair of sliding track holes 905 on the third platform, and the sliding tracks and the sliding track holes cooperate with each other to realize up and down sliding; the sliding tracks are cylindrical, and the sliding track holes are cylindrical through holes;

[0022] A second platform 911 on the side of the clamping ring, a rotating shaft 902 horizontally penetrating the second platform, a rotating gear 903 in the middle position of the rotating shaft, a rack 904 vertically penetrating through the middle of the third platform, and adjusting handwheels 901 at both ends of the rotating shaft; the rotating gear meshes with the rack;

[0023] A vertical through groove 912 on the side of the second platform and adjacent to the third platform; the through groove accommodates the rotating gear.

[0024] The sliding tracks and the sliding track holes are nested and combined together to realize the up and down repeated movement of the moving platform; the rotating gear in the vertical through groove inside the second platform behind the third platform is connected to the adjusting handwheel through the rotating shaft.

[0025] The lens support and the detection hole are respectively nested in the clamping ring and the star-shaped hole of the contact lens tray, wherein the lower clamping ring contacts and fixes with the bottom of the lens support, and the star-shaped hole of the upper contact lens tray does not contact the detection hole.

[0026] During detection, first, the operator controls the adjusting handwheel, and the third platform drives the contact lens tray to be adjusted to the lowest position. After confirming that there is no surface quality problem with the lens to be detected, the moisture on the surface of the lens to be detected is blotted dry with a lens cloth;

[0027] Use tweezers to hold the lens to be detected and gently place it on the detection head above the lens support, with the concave surface facing down;

[0028] If the exact center of the optical zone of the lens is aligned with the center of the detection hole, this device does not need to be used, and the diopter of the lens can be directly detected by operating the lensmeter;

[0029] If the exact center of the optical zone of the lens is not aligned with the center of the detection hole, then by controlling the adjustment wheel of this device to rotate clockwise, the contact lens carrier tray is gently moved upward, lifting the edge of the lens to be tested, so that the exact center of the optical zone of the lens to be tested is briefly separated from the detection head, and then controlling the adjustment wheel to rotate counterclockwise to drive the contact lens carrier tray to move downward, so that the lens to be tested with adjusted position falls on the detection hole 5; Since the contact lens carrier tray is low in the middle and high on both sides and has obvious boundaries for reference, at this time the optical zone of the lens generally aligns with the center of the detection hole 5;

[0030] If the exact center of the optical zone of the lens still fails to align with the center of the detection hole after the adjustment of this device, quickly repeat the above operations several times until the exact center of the optical zone of the lens to be tested is aligned with the center of the detection hole.

Claims

1. A contact lens lens fast positioning device, characterized in that: include: A horizontally placed snap ring (910), a first platform (909) located on the side of the snap ring, and a movable platform located on the first platform and sliding vertically relative to the first platform; the movable platform includes a horizontally placed contact lens tray (907).

2. A contact lens lens fast positioning device according to claim 1, characterized in that: Also includes: A pair of sliding rails (908) are located on the first platform, a third platform (906) is located on the side of the contact lens tray, and a pair of sliding rail holes (905) are located on the third platform. The sliding rails and the sliding rail holes cooperate with each other to achieve up and down sliding.

3. A contact lens lens fast positioning device according to claim 2, characterized in that: Also includes: A second platform (911) is located on the side of the retaining ring, a rotating shaft (902) horizontally passes through the second platform, a rotating gear (903) is located in the middle of the rotating shaft, and a rack (904) is located in the middle of the third platform and passes through vertically from top to bottom; the rotating gear is meshed with the rack.

4. A contact lens lens fast positioning device according to claim 3, characterized in that: Also includes: A vertical through slot (912) is located on the side of the second platform and adjacent to the third platform; the through slot accommodates the rotating gear.

5. A contact lens lens fast positioning device according to claim 3, characterized in that: Also includes: Adjustment hand wheels (901) are located at both ends of the rotating shaft.

6. A contact lens lens fast positioning device according to any one of claims 1 to 5, characterized in that: The clamping ring comprises a circular hole (913) which is nested with the lens support.

7. A contact lens lens fast positioning device according to any one of claims 1 to 5, characterized in that: A star-shaped hole is provided in the middle of the contact lens holding tray.

8. A contact lens lens fast positioning device according to claim 7, characterized in that: The diameter of the star-shaped hole is 8.0 mm±0.5 mm.

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