Device for detecting oxygen permeability of corneal contact lens

Abstract

The utility model discloses a device for detecting the oxygen permeability of a cornea contact lens, which relates to the technical field of contact lens testing and comprises a tooling plate, a tooling block arranged above the tooling plate, a rotating disc rotatably connected to the top of the tooling block, a small rod support frame fixedly connected above the rotating disc, a straight rod arranged above the small rod support frame, and a connecting rod arranged above the straight rod. A threaded rod is in threaded connection with the interior of the straight rod, a soft plate is fixedly connected to the end, away from the small rod supporting frame, of the threaded rod, a limiting rod is arranged on the outer side of the straight rod, the two ends of the limiting rod are fixedly connected to the straight rod and the soft plate correspondingly, and scales are carved on the outer side of the limiting rod; the top of the tool plate is fixedly connected with a pair of limiting plates, and the technical problems that a lens is fragile, the lens is fixed only by pushing a fixing device manually, the pushing distance is prone to being too long, and the lens is damaged, or the pushing distance is too short, and effective fixing cannot be achieved are solved.

Description

Technical Field

[0001] This utility model relates to the field of contact lens testing technology, specifically a device for detecting the oxygen permeability of corneal contact lenses. Background Technology

[0002] The process of testing the oxygen permeability of corneal contact lenses involves specialized testing methods and equipment. The principle behind the detection of oxygen permeability is based on the diffusion rate of oxygen molecules through the lens material. Specifically, the contact lens is placed in a test chamber, which is divided into upper and lower parts. Under specific temperature and humidity conditions (typically 35°C and 100% relative humidity), the front and rear surface areas of the contact lens (i.e., the upper and lower parts of the chamber) are exposed to oxygen and nitrogen, respectively, as a carrier gas. Oxygen permeates through the lens due to the concentration difference and enters the carrier gas flow, which is then delivered to the sensor. The sensor generates a current proportional to the oxygen concentration flowing through the sensor, thereby calculating the oxygen flow rate of the material, and thus obtaining the oxygen permeability coefficient (Dk) and the oxygen permeability (Dk / t) for a specific lens thickness.

[0003] A search revealed that the patent document (authorization announcement number CN 219178872 U) includes: a mounting base, on which a detection block is clamped by a limiting bolt, and one end of the detection block is provided with a detection cable connected to the outside; a detection head, disposed on the upper surface of the detection block, for detecting contact lenses, and the detection head is electrically connected to the detection cable; a connecting strip, elastically secured to the lower end of the outer surface of the detection head, with a bracket fixed on the connecting strip, and an elastic clamp connected to one side of the bracket via a length adjustment mechanism; by providing a connecting strip, bracket, elastic clamp, guide block, locking bolt, and adjustment plate, the device prevents the smooth contact lens from sliding and deviating from the detection head when the contact lens is placed directly on it. The device facilitates the fixation of the contact lens, improves the stability of placement, and allows for convenient adjustment of the position of the elastic clamp according to different outer diameter contact lenses.

[0004] However, the above-mentioned device still has shortcomings:

[0005] Lenses are relatively fragile. If the lens is fixed by pushing it with a hand, it is easy to push it too far, causing damage to the lens, or push it too short, which will not be able to fix it effectively. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a device for detecting the oxygen permeability of corneal contact lenses, addressing the issues that lenses are relatively fragile, and that relying solely on manual pushing and fixing devices to secure the lenses can easily lead to damage due to excessive pushing distance, or ineffective fixation due to insufficient pushing distance.

[0007] To achieve the above objectives, this utility model proposes a device for detecting the oxygen permeability of corneal contact lenses, comprising a fixture plate, a fixture block disposed above the fixture plate, a rotating disk rotatably connected to the top of the fixture block, a small rod support frame fixedly connected above the rotating disk, a straight rod disposed above the small rod support frame, a threaded rod internally connected to the straight rod, a flexible plate fixedly connected to the end of the threaded rod away from the small rod support frame, a limiting rod disposed on the outer side of the straight rod, the two ends of the limiting rod being fixedly connected to the straight rod and the flexible plate respectively, and a scale being engraved on the outer side of the limiting rod.

[0008] Preferably, the bottom of the tooling plate is fixedly connected to several bottom supports.

[0009] Preferably, a pair of limiting plates are fixedly connected to the top of the tooling plate, and fastening screws are threadedly connected to the side walls of the limiting plates.

[0010] Preferably, the tooling block is slidably connected between a pair of limiting plates, and the fastening screw abuts against the side wall of the tooling block.

[0011] Preferably, the top of the small rod support frame is provided with a rotating groove, and a straight plate is rotatably connected inside the rotating groove. A connecting shaft is fixedly connected to one end of the straight plate inside the rotating groove. The two ends of the connecting shaft are rotatably connected inside the rotating groove and extend through the rotating groove to its outer side. Both ends of the connecting shaft extending to the outer side of the rotating groove are threaded with fastening nuts.

[0012] Preferably, both ends of the straight rod are fixedly connected to the end of the straight plate away from the rotating groove, and a handle is fixedly connected to the end of the threaded rod near the small rod support frame.

[0013] Preferably, the flexible plate has a slot on the side away from the straight rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] During the fixation operation, the flexible plate is moved by rotating the threaded rod. The operator can determine the distance the flexible plate has moved by the change of the scale, so as to control the movement of the flexible plate more accurately and avoid the flexible plate moving too far and causing damage to the lens.

[0016] By precisely controlling the movement distance of the flexible plate, the risk of damage to the lens due to improper operation can be greatly reduced. Especially during the lens fixing process, even slight displacement differences can lead to uneven force on the lens or scratches. The design of rotating the threaded rod to drive the movement of the flexible plate is relatively simple and intuitive. Staff can master the operation method without complicated training. This design simplifies the operation process and reduces the difficulty of operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the rotating disk structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the straight rod structure of this utility model;

[0020] Figure 4 For the present utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Tooling plate; 2. Bottom bracket; 3. Limiting plate; 31. Fastening screw; 4. Tooling block; 41. Rotating disc; 5. Small rod support frame; 51. Rotary groove; 502. Connecting shaft; 503. Fastening nut; 52. Straight plate; 53. Straight rod; 54. Threaded rod; 541. Handle; 55. Limiting rod; 56. Flexible plate; 561. Slot; 57. Scale. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figure 1-4 As shown, a device for detecting the oxygen permeability of corneal contact lenses includes a fixture plate 1, and a plurality of bottom supports 2 are fixedly connected to the bottom of the fixture plate 1.

[0024] A pair of limiting plates 3 are fixedly connected to the top of the tooling plate 1, and fastening screws 31 are threadedly connected to the side wall of the limiting plate 3.

[0025] A tooling block 4 is provided above the tooling plate 1. The tooling block 4 is slidably connected between a pair of limiting plates 3, which may affect the experimental results. The fastening screw 31 abuts against the side wall of the tooling block 4.

[0026] A rotating disk 41 is rotatably connected to the top of the tooling block 4. A small rod support frame 5 is fixedly connected above the rotating disk 41. A straight rod 53 is set above the small rod support frame 5. A threaded rod 54 is threaded inside the straight rod 53. A flexible plate 56 is fixedly connected to the end of the threaded rod 54 away from the small rod support frame 5. A limit rod 55 is set on the outside of the straight rod 53. The limit rod 55 is a telescopic rod with a limit to prevent the flexible plate 56 from flipping when moving. The two ends of the limit rod 55 are fixedly connected to the straight rod 53 and the flexible plate 56 respectively. A scale 57 is engraved on the outside of the limit rod 55. The scale 57 can accurately show the distance the flexible plate 56 moves, which can effectively avoid the problem of moving too far or too short a distance, thereby avoiding the inability to effectively fix the lens or the damage to the lens caused by excessive movement.

[0027] By precisely controlling the movement distance of the flexible plate 56, the risk of damage to the lens due to improper operation can be greatly reduced. Especially during the lens fixing process, even slight displacement differences may cause uneven force on the lens or scratches. The design of rotating the threaded rod 54 to drive the movement of the flexible plate 56 is relatively simple and intuitive. Staff can master the operation method without complicated training. This design simplifies the operation process and reduces the difficulty of operation.

[0028] The top of the small rod support frame 5 is provided with a rotating groove 51. A straight plate 52 is rotatably connected inside the rotating groove 51. One end of the straight plate 52, which is located inside the rotating groove 51, is fixedly connected to a connecting shaft 502. Both ends of the connecting shaft 502 are rotatably connected inside the rotating groove 51 and extend through the rotating groove 51 to its outer side. Both ends of the connecting shaft 502 extending to the outer side of the rotating groove 51 are threaded with fastening nuts 503. By rotating the straight plate 52, the height of the flexible plate 56 can be adjusted to move it to a suitable position. When it is necessary to move the straight plate 52, loosen the fastening nuts 503 and then adjust the straight plate 52. After adjustment, tighten the fastening nuts 503 to achieve the effect of fixing the straight plate 52.

[0029] Both ends of the straight rod 53 are fixedly connected to the end of the straight plate 52 away from the rotating groove 51. The threaded rod 54 is fixedly connected to the end near the small rod support frame 5 with a handle 541. The flexible plate 56 has a slot 561 on the side away from the straight rod 53.

[0030] Working principle: During the fixing operation, the movement of the tooling block 4 can be controlled by tightening or loosening the fastening screw 31, which plays a fixing and limiting role for the tooling block 4 and prevents the tooling block 4 from shifting during subsequent operations.

[0031] Then, by rotating the straight plate 52, the height of the flexible plate 56 can be adjusted to move it to a suitable position. When it is necessary to move the straight plate 52, loosen the fastening nut 503 and then adjust the straight plate 52. After the adjustment is completed, tighten the fastening nut 503 to achieve the effect of fixing the straight plate 52.

[0032] Then, by rotating the threaded rod 54, the flexible plate 56 is driven to move. The operator can determine the distance that the flexible plate 56 has moved by the change of the scale 57, so as to control the movement of the flexible plate 56 more precisely and avoid the flexible plate 56 moving too far, which would damage the lens.

[0033] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. An apparatus for detecting oxygen permeability of a corneal contact lens, characterized by, The utility model provides a kind of tooling plate (1), the top of tooling plate (1) is provided with tooling block (4), the top of tooling block (4) is rotatably connected with rotating disc (41), the top of rotating disc (41) is fixedly connected with small rod support frame (5), the top of small rod support frame (5) is provided with straight bar (53), the inside of straight bar (53) is threadedly connected with threaded rod (54), the end of threaded rod (54) away from small rod support frame (5) is fixedly connected with soft board (56), the outside of straight bar (53) is provided with limit rod (55), the both ends of limit rod (55) are fixedly connected in straight bar (53) and soft board (56) respectively, the outside of limit rod (55) is engraved with scale (57).

2. A device for detecting oxygen permeability of a corneal contact lens according to claim 1, wherein The bottom of the tooling plate (1) is fixedly connected with a plurality of bottom supports (2).

3. The device for detecting oxygen permeability of a corneal contact lens according to claim 1, wherein The top of the tooling plate (1) is fixedly connected with a pair of limiting plates (3), and the side wall of the limiting plate (3) is threadedly connected with a fastening screw (31).

4. The device for detecting the oxygen permeability of a corneal contact lens according to claim 3, characterized in that, The tooling block (4) is slidably connected between the pair of limiting plates (3), and the fastening screw (31) abuts against the side wall of the tooling block (4).

5. The device for detecting oxygen permeability of a corneal contact lens according to claim 1, wherein The top of the small rod support frame (5) is provided with a rotating groove (51), and the inside of the rotating groove (51) is rotatably connected with a straight plate (52), one end of the straight plate (52) provided in the rotating groove (51) is fixedly connected with a connecting shaft (502), the both ends of the connecting shaft (502) are rotatably connected in the rotating groove (51) and extend to the outside of the rotating groove (51), and the both ends of the connecting shaft (502) extending to the outside of the rotating groove (51) are threadedly connected with fastening nuts (503).

6. A device for detecting the oxygen permeability of a corneal contact lens according to claim 5, characterized in that The both ends of the straight bar (53) are fixedly connected to one end of the straight plate (52) away from the rotating groove (51), and one end of the threaded rod (54) close to the small rod support frame (5) is fixedly connected with a handle (541).

7. The device for detecting the oxygen permeability of a corneal contact lens according to claim 5, characterized in that, The side of the soft board (56) away from the straight bar (53) is provided with a clamping groove (561).

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