Intraocular lens injector

Abstract

The utility model belongs to the technical field of surgical instruments, and discloses an intraocular lens injector which comprises a tube body, a push rod is arranged in the tube body in a sliding mode, a loading opening for installing a loading groove is formed in the front section of the tube body, the push rod is divided into an outer rod and an inner rod, the inner rod is connected with the outer rod in a sliding mode, and the outer rod is provided with a first rack section in the rod direction. The inner rod is provided with a second rack section in the rod direction, a notch is formed in the rear section of the pipe body, a variable gear is rotationally arranged in the notch and provided with a large gear and a small gear which are coaxially and fixedly connected, the large gear is meshed with the first rack section, and the small gear is meshed with the second rack section. The push rod is changed into the outer rod and the inner rod which are in sliding connection, and the outer rod and the inner rod are in speed reduction transmission connection through the variable gear, so that the advancing speed of the inner rod is smaller than that of the outer rod, the crystalline lens injection speed is reduced, the controllability is improved, the crystalline lens injection accuracy is improved, the occurrence probability of unforeseen circumstances is reduced, and the operation success rate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of surgical instruments, and in particular relates to an artificial lens injector. Background Art

[0002] Intraocular lens implantation is a surgical method for treating cataracts. During the intraocular lens implantation procedure, an intraocular lens injector is required to push the intraocular lens in a targeted manner and implant it into the patient's eye.

[0003] The utility model patent with patent number CN212973159U discloses an artificial lens injector. The installation groove, the stabilizing ring made of rubber or silicone material, the strip groove and the strip protrusion can promote better stability when controlling the injection rod to move in the main body of the injector, and the arc groove and anti-slip pattern arranged on the bottom surface of the fixed ear plate can make the injector more convenient to operate and use.

[0004] However, there is a problem with this technical solution: the force and speed are difficult to control during injection, the controllability is low, and the chance is strong. This is also a common problem of current injection devices. Utility Model Content

[0005] In order to overcome the above technical problems, the utility model provides an artificial lens injector.

[0006] The utility model adopts the following technical solutions:

[0007] An intraocular lens injector comprises a tube body, a push rod is slidably arranged in the tube body, a front section of the tube body is provided with a loading port for installing a loading slot, the push rod is divided into an outer rod and an inner rod, the inner rod is slidably connected to the outer rod, the outer rod has a rack segment 1 along the rod direction, the inner rod has a rack segment 2 along the rod direction, a notch is arranged in the rear section of the tube body, a speed change gear is rotatably arranged in the notch, the speed change gear has a large gear and a small gear coaxially fixedly connected, the large gear is meshed with the rack segment 1, and the small gear is meshed with the rack segment 2.

[0008] Preferably, the rack segment 1 is arranged at the full stage of the outer rod, the length of the outer rod is not less than the distance from the speed change gear to the loading port, and when the front end of the outer rod reaches the notch position, the inner rod can reach the boost end point.

[0009] Preferably, the rack segment 2 is arranged at the rear half of the inner rod, and the distance from the front end of the rack segment 2 to the loading port is not less than the maximum stroke of the inner rod.

[0010] Preferably, the outer rod is hollow to accommodate the inner rod, the outer rod has a narrow and long opening along the rod direction, and the rack segment 2 is meshed with the pinion gear in the narrow and long opening.

[0011] Preferably, a gear cover is arranged outside the notch.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model changes the push rod into an outer rod and an inner rod which are slidably connected, and the outer rod and the inner rod are connected by a speed-changing gear reduction transmission, so that the forward speed of the inner rod is lower than that of the outer rod, the lens injection speed is slowed down, the maneuverability is improved, the accuracy of lens injection is improved, the probability of accidental situations is reduced, and the success rate of the operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the utility model (with the gear cover removed);

[0016] Figure 3 The utility model is a schematic diagram of the connection relationship between the outer rod, the inner rod and the speed change gear.

[0017] Description of reference numerals:

[0018] 1 push rod; 2 tube body; 21 loading port; 3 speed change gear; 31 large gear; 32 small gear; 11 outer rod; 12 rack segment 1; 13 inner rod; 14 rack segment 2. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the embodiments are conventional methods in the art unless otherwise specified. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0020] An intraocular lens pusher comprises a tube body 2, a push rod 1 is slidably arranged in the tube body 2, a loading port 21 for installing a loading slot is provided at the front section of the tube body 2, the push rod 1 is divided into an outer rod 11 and an inner rod 13, the inner rod 13 is slidably connected to the outer rod 11, the outer rod 11 has a rack segment 12 along the rod direction, the inner rod 13 has a rack segment 2 14 along the rod direction, a notch is provided at the rear section of the tube body 2, a speed change gear 3 is rotatably arranged in the notch, the speed change gear 3 has a large gear 31 and a small gear 32 coaxially fixedly connected, the large gear 31 is meshed with the rack segment 12, the outer rod 11 is hollow to accommodate the inner rod 13, and the outer rod 11 has a narrow and long opening along the rod direction The rack segment 14 meshes with the pinion 32 in the narrow opening. After the speed change gear 3 is decelerated, the movement speed of the inner rod 13 is less than the movement speed of the outer rod 11 during injection, thereby improving controllability; the rack segment 12 is arranged in the full stage of the outer rod 11, and the length of the outer rod 11 is not less than the distance from the speed change gear 3 to the loading port 21. When the front end of the outer rod 11 reaches the notch position, the inner rod 13 can reach the boost end point; the rack segment 14 is arranged in the second half of the inner rod 13, and the distance from the front end of the rack segment 14 to the loading port 21 is not less than the maximum stroke of the inner rod 13; in order to prevent foreign matter from getting stuck in the speed change gear 3, a gear cover is arranged outside the notch.

[0021] An intraocular lens pusher, when used:

[0022] After loading the intraocular lens into the loading slot, install the loading slot on the loading port 21, then hold the injector, and push the outer rod 11 forward with your thumb. When the outer rod 11 moves forward, the large gear 31 drives the small gear 32 to rotate through the rack segment 12, and the small gear 32 drives the inner rod 13 forward through the rack segment 2 14. After deceleration, the movement speed of the inner rod 13 is less than that of the outer rod 11, thereby improving the operability and controllability of the lens injection.

[0023] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An intraocular lens injector, comprising a tube body, a push rod slidably arranged in the tube body, a loading port for installing a loading slot is opened at the front section of the tube body, characterized in that: The push rod is divided into an outer rod and an inner rod, the inner rod is slidably connected to the outer rod, the outer rod has a rack segment 1 along the rod direction, the inner rod has a rack segment 2 along the rod direction, a notch is provided in the rear section of the tube body, a speed change gear is rotatably arranged in the notch, the speed change gear has a large gear and a small gear coaxially fixedly connected, the large gear is meshed with the rack segment 1, and the small gear is meshed with the rack segment 2; The outer rod is hollow to accommodate the inner rod, and the outer rod has a narrow and long opening along the rod direction, and the rack segment 2 is meshed with the pinion gear in the narrow and long opening.

2. An intraocular lens injector according to claim 1, characterized in that: The rack segment 1 is arranged at the full stage of the outer rod, the length of the outer rod is not less than the distance from the speed change gear to the loading port, and when the front end of the outer rod reaches the notch position, the inner rod can reach the boosting end point.

3. An intraocular lens injector according to claim 1, characterized in that: The rack segment 2 is arranged at the rear half of the inner rod, and the distance from the front end of the rack segment 2 to the loading port is not less than the maximum stroke of the inner rod.

4. An intraocular lens injector according to claim 1, characterized in that: A gear cover is arranged outside the notch.

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