JP4766442B2 - Intraocular lens insertion device - Google Patents

Intraocular lens insertion device Download PDF

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Publication number
JP4766442B2
JP4766442B2 JP2004380871A JP2004380871A JP4766442B2 JP 4766442 B2 JP4766442 B2 JP 4766442B2 JP 2004380871 A JP2004380871 A JP 2004380871A JP 2004380871 A JP2004380871 A JP 2004380871A JP 4766442 B2 JP4766442 B2 JP 4766442B2
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Prior art keywords
lens
mechanism
lock mechanism
portion
out
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JP2006181269A (en
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節 一戸
和徳 工藤
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Hoya株式会社
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/14Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16Intraocular lenses
    • A61F2/1662Instruments for inserting intraocular lenses into the eye
    • A61F2/1664Instruments for inserting intraocular lenses into the eye for manual insertion during surgery, e.g. forceps-like instruments

Description

The present invention is an intraocular lens insertion device used to insert an intraocular lens into an aphakic eye after cataract surgery, or used to insert a phakic intraocular lens in refractive surgery. The present invention relates to an intraocular lens insertion instrument.

In cataract surgery, removal of a turbid lens by ultrasonic emulsification and aspiration (PEA) and implantation of an intraocular lens in the eye after removal of the lens are widely performed. The intraocular lens includes a hard intraocular lens whose optical part is made of a hard material such as PMMA, and a soft intraocular lens made of a soft material such as silicone elastomer and soft acrylic. When using a hard intraocular lens, an incision with the same width as the diameter of the optical part must be made in the cornea or sclera and the lens must be inserted, whereas when using a soft intraocular lens Can be inserted from an incision smaller than the diameter of the optical part by folding the optical part. In order to reduce corneal astigmatism and infection after surgery, it is preferable that a lens is inserted through a small incision, and at present, a soft intraocular lens tends to be preferred. In order to put the lens into the eye, a dedicated injector having a structure for introducing the lens into the eye through an elongated tube may be used. By using such an injector dedicated to an intraocular lens, it is possible to insert a lens from an incisional wound smaller than 3 mm.

More recently, in order to eliminate the possibility of contamination by bacteria when handling the lens and the possibility of operational errors that may occur when handling the lens, preset injectors in which the lens is set in the injector in advance have been released. In preset injectors, in order to shift from the fixed state of the lens at the time of shipment to the operating state of the lens at the time of use, there is a mechanism that holds the optical part inside without stress, and a position that can be extruded by the extrusion mechanism Some have a lens moving mechanism for moving them (for example, Patent Documents 1 and 2). In addition, as a method for stably installing a lens in an intraocular lens insertion device, an intraocular lens insertion device that is used by holding the lens in an unstressed state and pushing the lens with a plunger positioned coaxially with the lens. Is disclosed (for example, Patent Document 3).
JP 2003-325570 A JP 2003-325572 A JP 09-506285 A

However, in Patent Document 1 or 2 described above, a special mechanism for moving the lens from the holding position to a position where the lens can be pushed out is required, so that the mechanism of the entire system becomes complicated. There was concern that would not be pushed out properly. Furthermore, even in the above-mentioned Patent Document 3, there is a possibility that the insertion instrument does not have a lock mechanism for fixing the lens, so that the plunger may be erroneously started to be pushed, and is not suitable for a preset type injector. there were.

Therefore, it is necessary to provide a function of fixing the lens in order to keep the unused state in the preset type injector in which the lens is set in the injector in advance. However, when such a lens fixing function is provided, it cannot be pushed out easily when used, and some means for releasing the lens fixing state is required. However, if the function of moving the lens at a fixed position to a position where the lens can be pushed out is provided during use, the configuration of the entire system becomes complicated, and a malfunction may occur when the lens is moved to a position where the lens can be pushed out.

In view of the above-described problems, the present invention provides an intraocular lens insertion device that can perform a lens pushing operation more easily and safely, and can safely hold the lens without malfunctioning when not in use. With the goal.

In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a lens extrusion unit for extruding a lens installed in the lens installation unit, a main body composed of a lens installation unit in which a lens is installed and a cylindrical part for introducing the lens In the intraocular lens insertion device provided with a mechanism, the lens installation portion has a lock mechanism for fixing the lens to the lens installation portion , and the lock mechanism is released by moving or deforming the lock mechanism. The lock mechanism is configured to fix the lens coaxially with the lens push-out mechanism, and is configured to release the lock mechanism by moving the lens push-out mechanism in the lens direction. It is characterized by that.

The invention according to claim 2 is characterized in that the lock mechanism is provided so as to be movable or deformable in a substantially vertical direction with respect to a travel axis of a lens pushed out by the lens push-out mechanism.

The invention according to claim 3 is characterized in that the lock mechanism includes a holding member that is provided around the lens and holds the lens, and a support member that supports the holding member.

The invention according to claim 4 is characterized in that the locking mechanism is configured to hold a lens by forming a gap between the lens installation portion and the lens.

The invention according to claim 5 is configured such that the support member is provided in the lens installation portion so as to be elastically deformable, and the lock mechanism is deformed by an operation of the lens push-out mechanism pushing out the lens. And

According to a sixth aspect of the present invention, the lens push-out mechanism includes a plunger that pushes out a lens and a slider having a lens contact portion larger than the plunger, and the lock mechanism is operated by the slider pushing out the lens. It is characterized by deforming.

The invention according to claim 7 is characterized in that the plunger and the slider are configured to push the lens in conjunction with each other.

According to the intraocular lens insertion device of the first aspect of the present invention, the lens can be released by moving or deforming the lock mechanism, so that the lens can be pushed out easily and safely. Further, when not in use, the lens can be safely held by a lock mechanism. Furthermore, since the lock mechanism is configured to fix the lens coaxially with the lens push-out mechanism, the configuration is simple and malfunction can be prevented.

In addition, according to the intraocular lens insertion device of the first aspect, the lock mechanism can be released by a series of operations for pushing out the lens, so that it can be operated more easily.

Further, according to the intraocular lens insertion device of the second aspect, the locking mechanism can be reliably released by providing the lens so as to be movable or deformable in a substantially vertical direction with respect to the advancing axis of the lens. The lens can be pushed out more easily and safely.

In addition, according to the intraocular lens insertion instrument of the third aspect, the lens can be held with a simple configuration, and the lock mechanism can be reliably released, so that malfunction can be prevented.

In addition, according to the intraocular lens insertion device of the fourth aspect, since the lens contacts the inner surface of the lens installation portion for the first time in use, the lens is prevented from coming into close contact with the inner surface of the lens installation portion, and the lens can be easily Can be extruded.

Further, according to the intraocular lens insertion device of the fifth aspect, the lock mechanism can be released by the operation of pushing out the lens, so that the operation can be easily performed. In addition, since it is possible to reliably prevent forgetting to release, the usability can be further improved.

Further, according to the intraocular lens insertion device according to claim 6, since the locking mechanism is released by the slider and the initial operation for deforming the lens is performed, local stress is applied to the lens by surface contact with the lens. Without giving, the initial operation can be performed smoothly and the deformation of the lens can be prevented.

Further, according to the intraocular lens insertion device according to claim 7, since the slider can be operated by the operation of pushing out the plunger, a series of operations from the initial operation by the slider until the lens is pushed out by the plunger are further performed. It can be done smoothly.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. An intraocular lens insertion device 1 shown in FIG. 1 is used to send a deformable intraocular lens 2 (hereinafter referred to as a lens 2) safely and quickly into the eye. It is a preset type intraocular lens insertion instrument that is preset in the intraocular lens insertion instrument. Specifically, a main body 5 including a lens installation portion 3 for installing the lens 2 and a cylindrical portion 4 for inserting the lens 2 into the eye, and a lens push-out mechanism 6 for pushing out the lens 2 installed in the lens installation portion 3. With. The lens 2 includes an optical part 2a and a loop 2b.

The main body 5 includes a main body distal end portion 7 and a main body base end portion 8 made of a cylindrical member, and various materials can be used. For example, metals such as stainless steel and titanium can be used.

The main body distal end portion 7 includes the lens installation portion 3, the cylindrical portion 4, a tapered portion 9 that connects the lens installation portion 3 and the cylindrical portion 4, and the lens push-out mechanism 6. A notch groove 10 formed on the left and right in parallel with the lens advancing axis A, which is the advancing axis, and a stopper 11 engaged with the main body base end 8 are provided.

The main body base end portion 8 is loosely fitted to the main body front end portion 7 from the base end side of the main body front end portion 7 to form the main body 5, a stopper receiving portion 12 that engages with the stopper 11, a gripping portion 13, Is provided.

As shown in FIG. 2, the lens installation unit 3 includes an opening 20 that opens upward, and a lock mechanism 21 that fixes the lens 2 inserted from the opening 20. The lock mechanism 21 has a function of holding the lens 2 in a state where the lens 2 is not loaded and the lens 2 is not deformed, and further prevents the lens 2 from popping out due to an operation error. The lock mechanism 21 includes a holding member 22 provided around the lens 2 and a support member 23 that supports the holding member 22. The lens 2 is fixed coaxially with the lens pushing mechanism 6, that is, on the lens traveling axis A.

The holding member 22 is constituted by a front holding portion 22a and a rear holding portion 22b which are erected in the front-rear direction of the lens advancing axis A with a distance of approximately the same length as the diameter of the lens 2. The holding member 22 is supported by and integrated with the support member 23.

The support member 23 is provided on the surface of the lens installation portion 3 facing the opening 20 and is provided at the fulcrum B so as to be elastically deformable. The rear holding portion 22b is integrally provided with an inclined surface 24 that rises toward the front of the lens traveling axis A.

The lens pushing mechanism 6 comprises a plunger 25 for inserting the lens 2 into the eye and a slider 26 for performing an initial operation for inserting the lens 2.

The slider 26 has a contact portion 27 that contacts the lens 2 in a larger area than the plunger 25, a guide groove 28 that supports the plunger 25 along the lens traveling axis A, and a notch provided in the main body 5. It comprises a wing 29 that engages with the groove 10 and supports the slider 26 along the lens traveling axis A, and a grip 30 that pushes and returns the slider 26.

The abutment portion 27 is formed by a part of an arc having a radius of curvature substantially the same as the outer diameter of the lens 2, and is in smooth contact with the lens 2 without causing local stress on the lens 2. The initial operation can be performed.

The guide groove 28 is formed in substantially the same shape as the outer shape of the plunger 25 in parallel with the lens traveling axis A.

The plunger 25 is arranged to be slidable in the guide groove 28 and so that the tip of the plunger 25 can protrude from the contact portion 27. The guide groove 28 may be a through hole formed in parallel with the lens traveling axis A.

The wing portion 29 engages with the notch groove 10 to hold the slider 26 at the approximate center of the main body 5 and to move the slider 26 along the lens advancing axis A. Accordingly, the plunger 25 is held at the center of the main body 5 and can be moved along the lens traveling axis A by the guide groove 28. The slider 26 is easily moved by the grip portion 30.

The cylindrical portion 4 is provided at the tip of the main body 5 continuously to the lens installation portion 3 and has an outer diameter that is substantially the same as that of the incision wound. The tube portion 4 and the lens installation portion 3 are connected by a tapered portion 9 that gradually decreases in diameter toward the tip. The lens 2 is folded when it is pushed out by the lens pushing mechanism 6 and passes through the tapered portion 9.

As shown in FIG. 3, a cover member 31 for closing the opening 20 is detachably provided on the main body 5. The cover member 31 has a substantially U-shaped cross section, is attached to the main body 5 from the side, and the opening side of the cover member 31 is fixed to the main body by the fixing means 32.

Next, a procedure for assembling the intraocular lens insertion device 1 configured as described above will be described. The wing 29 of the slider 26 is engaged with the notch groove 10 of the main body distal end portion 7, and the slider 26 is inserted into the main body distal end portion 7 from the proximal end side. Next, the main body base end portion 8 is loosely inserted from the base end side of the main body front end portion 7. At the same time, while pushing the slider 26 with the main body base end portion 8, the main body base end portion 8 is pushed in until the stopper 11 formed at the main body front end portion 7 engages with the stopper receiving portion 12 provided at the main body base end portion 8. In this way, the slider 26 is attached to the main body 5. Also, the plunger 25 is inserted into the guide groove 28 formed in the slider 26, and the intraocular lens insertion instrument 1 is assembled.

Next, the operation of the above configuration will be described. First, the lens 2 is installed on the main body 5. That is, the lens 2 is inserted into the lens installation part 3 through the opening 20 and placed between the front holding part 22a and the rear holding part 22b (FIG. 4A). In order to keep the installed lens 2 in a sterile state, the opening 20 is closed with a cover member 31 and sealed as shown in FIG. In this way, the lens 2 can be installed on the main body 5. Next, the grip portion 30 is operated to move the slider 26 forward along the lens traveling axis A. When the slider 26 is moved forward, the contact portion 27 reaches the inclined surface 24 (FIG. 4B). When the contact portion 27 reaches the inclined surface 24, the resistance force generated in the slider 26 increases. When the slider 26 is moved further forward against the resistance force, the slider 26 pushes down the inclined surface 24 (FIG. 4C). When the slider 26 pushes down the inclined surface 24, the support member 23 is elastically deformed downward about the fulcrum portion B (FIG. 4C). When the support member 23 is elastically deformed downward, the holding member 22 is released downward, which is substantially perpendicular to the lens traveling axis A. When the holding member 22 is released downward, the contact portion 27 contacts the lens 2. When the contact portion 27 contacts the lens 2, the lens 2 is pushed out. The slider 26 pushes out the lens 2 until the contact part 27 reaches the taper part 9. When the lens 2 is pushed out, the lens 2 is folded by the tapered portion 9 and the lens 2 reaches the cylindrical portion 4. The lens 2 that has reached the tube portion 4 can be inserted into the eye in a folded state by being pushed out by the plunger 25.

With the above configuration, the lens 2 can be held without applying a load to the lens 2 by the holding member 22 and without being deformed when not in use. Furthermore, when the slider 26 is moved, the resistance of the slider 26 increases when the slider 26 reaches the inclined surface 24, so that an operation error can be prevented. In addition, since the lock mechanism 21 can be released simply by moving the slider 26 against the resistance force generated by the inclined surface 24 in use, the lens 2 can be inserted with a simple configuration and operation. In addition, after the lens 2 is installed, it is possible to shift to a use state while maintaining a sealed state, so that contamination by bacteria can be prevented and a high hygiene state can be maintained.

As described above, the intraocular lens insertion device 1 according to this embodiment includes the main body 5 including the lens installation portion 3 in which the lens 2 is installed and the cylindrical portion 4 into which the lens is introduced, and the lens installation portion 3. In the intraocular lens insertion device 1 provided with a lens push-out mechanism 6 that pushes out the formed lens 2, the lens installation section 3 has a lock mechanism 21 that fixes the lens 2, and the lock mechanism 21 is a lock mechanism. Since it is configured to be released by moving or deforming 21 or the lens 2, it can be released by moving or deforming the lock mechanism 21 or the lens 2, and the lens 2 can be pushed out more easily and safely. it can. Further, when not in use, the lens 2 can be held safely by the lock mechanism 21 without causing malfunction.

In addition, since the lock mechanism 21 is released by moving the lens push-out mechanism 6 in the lens direction, the lock mechanism 21 can be released by a series of operations for pushing out the lens 2, so that it can be operated more easily.

Further, since the lock mechanism 21 is provided so as to be movable or deformable in a substantially vertical direction with respect to the lens advancing axis A pushed out by the lens push-out mechanism 6, the lock mechanism can be reliably released. The lens 2 can be pushed out easily and safely.

The lock mechanism 21 includes a holding member 22 that is provided around the lens 2 and holds the lens 2 and a support member 23 that supports the holding member 22. Therefore, the lock mechanism 21 can hold the lens 2 with a simple configuration. Since the lock mechanism 21 can be reliably released, an operation error can be prevented.

Further, the support member 23 is provided in the lens installation portion 3 so as to be elastically deformable, and is configured such that the lock mechanism 21 is deformed by the operation of pushing out the lens 2 by the lens push-out mechanism 6. Yes. In addition, since it is possible to reliably prevent forgetting to release, the usability can be further improved.

The lens pushing mechanism 6 includes a plunger 25 for pushing the lens 2 and a slider 26 having a lens contact portion 27 larger than the plunger 25 and performing an initial operation for inserting the lens 2. The lock mechanism 21 is deformed by the operation of the lens 26 pushing out the lens 2, and the lens 2 is brought into surface contact with the lens 2 so that the initial operation can be smoothly performed without applying local stress to the lens 2. Deformation can be prevented.

Next, a modified example of the lens push-out mechanism 6 having the above configuration will be described. The lens push-out mechanism 6 according to this modification includes a plunger 25 and a slider 26, and the plunger 25 and the slider 26 are provided so as to be interlocked with each other. The plunger 25 is disposed in the guide groove 28 so as to be movable in the front-rear direction of the lens traveling axis A. The plunger 25 has a recess 25a on the circumference. The slider 26 is provided with a guide groove 28 provided along the traveling axis of the lens 2, and a convex portion 28 a that engages with the concave portion 25 a in the guide groove 28.

The operation of the lens pushing mechanism 6 configured as described above will be described. The plunger 25 can move independently until the concave portion 25a is engaged with the convex portion 28a (FIG. 5A). When the plunger 25 is moved forward, the concave portion 25a engages with the convex portion 28a. When the concave portion 25a is engaged with the convex portion 28a, the slider 26 moves forward in conjunction with the plunger 25 (FIG. 5B). When the slider 26 moves forward together with the plunger 25, the contact portion 27 reaches the inclined surface 24. When the contact portion 27 reaches the inclined surface 24, the slider 26 pushes down the inclined surface 24. When the slider 26 pushes down the inclined surface 24, the holding member 22 is released downward. When the holding member 22 is released downward, the contact portion 27 contacts the lens 2. When the contact portion 27 contacts the lens 2, the lens 2 is pushed out. When the lens 2 is pushed out, the lens 2 is folded by the tapered portion 9 and the lens 2 reaches the cylindrical portion 4. At this time, the slider 26 comes into contact with the tapered portion 9 and is restrained. When the slider 26 comes into contact with the tapered portion 9, the concave portion 25a is disengaged from the convex portion 28a, so that the engagement between the slider 26 and the plunger 25 is disengaged, and the plunger 25 can be moved independently. When the plunger 25 is moved forward, the lens 2 moves from the tapered portion 9 to the cylindrical portion 4 and is pushed out from the main body 5.

By configuring in this way, the operator can smoothly perform the initial operation of deforming the lens 2 by the slider 26 only by moving the plunger 25 forward, making the operation easier and making an operation mistake. Can be prevented. The convex portion 28a and the concave portion 25a are provided when the plunger 25 and the slider 26 are interlocked with each other and have the shape and strength necessary for pushing down the support member 23, and when the slider 26 reaches the tapered portion 9. It is desirable to provide flexibility that can be reliably released without causing breakage.

As described above, in the intraocular lens insertion device 1 according to this embodiment, the plunger 25 and the slider 26 push the lens 2 in conjunction with each other. A series of operations until the lens 2 is pushed out by 25 can be performed more smoothly.

Next, another modified example of the lens pushing mechanism 6 in the above configuration will be described. In addition, the same code | symbol is attached | subjected about the structure similar to the said Example, and description is abbreviate | omitted for simplicity.

The intraocular lens insertion device 1 according to the present embodiment is configured such that the lock mechanism 21 can be released by an operation of fixing the lens 2 with the lock mechanism 21 and moving the lens push-out mechanism 6 forward.

The locking mechanism 21 is provided in a symmetrical manner with respect to the lens traveling axis A, and is provided on the proximal end side of the holding member 22 so as to narrow the passage of the plunger 25 toward the distal end. And an inclined surface 24. The lock mechanism 21 holds the lens 2 above the plunger 25 so as to be orthogonal to the lens travel axis A, and is fixed to the inner surface of the main body 5 so as to be elastically deformable at a fulcrum portion (not shown).

The lens pushing mechanism 6 includes a widened portion 35 that abuts on the inclined surface 24 and pushes the holding member 22 left and right, and a plunger 25 that pushes out the lens 2. The widened portion 35 and the plunger 25 are integrally formed. The plunger 25 is widened so that the tip of the plunger 25 is positioned between the optical part 2a of the lens 2 and the loop 2b, and comes into contact with the lens 2 when the locking mechanism 21 is released by the widening part 35. It is formed so as to protrude from the portion 35.

Next, the operation of the above configuration will be described. The lens push-out mechanism 6 is moved forward with the lens 2 placed on the lock mechanism 21. When the lens pushing mechanism 6 is moved forward, the widened portion 35 comes into contact with the inclined surface 24. When the widened portion 35 comes into contact with the inclined surface 24, resistance is applied to the force that moves the lens pushing mechanism 6 forward. When the lens pushing mechanism 6 is moved forward against the resistance, the widened portion 35 pushes the inclined surface 24 left and right. When the widened portion 35 pushes the inclined surface 24 left and right, the holding member 22 spreads left and right around the fulcrum portion. When the holding member 22 spreads left and right, the lock mechanism 21 is released and the lens 2 becomes free. When the lens push-out mechanism 6 is further moved forward, the plunger 25 comes into contact with the lens 2 and the lens 2 can be pushed out.

With this configuration, the lock mechanism 21 can be released only by moving the lens push-out mechanism 6 forward, and the lens 2 can be pushed out, so that the operation can be performed smoothly. Further, since the plunger 25 is formed so as to be positioned between the optical portion 2a of the lens 2 and the loop 2b, the operation of pushing out the lens 2 can prevent the loop 2b from being damaged.

Note that the plunger 25 may be configured to be movable in the front-rear direction relative to the widened portion 35. In this case, the widened portion 35 is provided with a contact portion 27 constituted by a part of an arc having a radius of curvature substantially the same as the outer diameter of the lens 2, and the lens 2 is locally brought into contact with the lens 2 by surface contact. The initial operation may be performed without applying any stress. Of course, the widened portion 35 and the plunger 25 may be installed so as to be interlocked with each other.

Next, a second embodiment of the present invention will be described with reference to FIGS. The lock mechanism 21 according to this embodiment has a function of holding the lens 2 and fixing the lens push-out mechanism 6 at the same time.

The locking mechanism 21 removes a holding member 22 that holds the lens 2, a fixing member 41 that fixes the slider 26, a cap member 42 that protects the tip of the main body 5, and a support member 23 that supports them. And a handle 43 for the purpose.

The holding member 22 is composed of a front holding portion 22a material 22 and a rear holding portion 22b material 22 made of a columnar or wall-like member erected around the lens 2. In particular, the rear holding portion 22b is preferably a wall-like member having a surface area larger than the cross-sectional area of the plunger 25 in order to prevent the plunger 25 from popping out due to an operation error.

The slider 26 includes a contact portion 27, a guide groove 28, a wing portion 29, a grip portion 30, a fixing hole 44 to be inserted into the fixing member 41, and a loop guide 45 for the loop 2b of the lens 2. Is formed. The loop guide 45 fixes the lens 2 by the loop 2b of the lens 2 being hooked.

As shown in FIG. 8, a through hole into which the holding member 22 and the fixing member 41 are inserted is formed in the main body distal end portion 7. Further, an opening 20 is formed on the surface of the main body distal end portion 7 to which the lock mechanism 21 is mounted, and the opening 20 is provided with a cover body 46 that can be opened and closed. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6.

A procedure for installing the lens 2 in the intraocular lens insertion instrument 1 will be described. First, the lens 2 is inserted from the opening 20. The lens 2 is installed in the lens installation section 3 through the loop 2b of the inserted lens 2 through the loop guide 45 (FIG. 8). When the lens 2 is installed, the cover body 46 is closed and the opening 20 is closed. When the opening 20 is closed, the lock mechanism 21 is mounted from above. That is, the lock mechanism 21 is attached to the main body 5 by inserting the cap member 42 into the tip of the main body 5, inserting the holding member 22 into the through hole, and inserting the fixing member 41 into the fixing hole from the through hole. The Thus, the lens 2 is held by the holding member 22, and the loop 2b is hooked on the loop guide 45, and the slider 26 is fixed by the fixing member 41 and the plunger 25 is fixed by the rear holding portion 22b. Therefore, the lens push-out mechanism 6 can be prevented from popping out due to an operation error. In addition, since the tip portion is protected by the cap member 42, it is possible to prevent damage due to breakage or adhesion of foreign matter.

In use, the support member 23 can be detached from the main body 5 by lifting the handle 43. At the same time that the support member 23 is removed from the main body 5, the holding member 22 can move from the through hole in a direction substantially perpendicular to the lens traveling axis A to release the lock and shift to the use state.

As described above, in the intraocular lens insertion device 1 according to the present embodiment, since the lock mechanism 21 is detachably provided in the lens installation portion 3, the lock mechanism 21 can be released with a simple configuration. The pushing operation of the lens 2 can be easily performed.

In addition, the lock mechanism 21 includes a latching means 41 that latches and fixes the lens pusher mechanism 6 in a state where the lens pusher mechanism 6 is in contact with the lens 2. Since this also serves as a function of holding, the configuration can be simplified and the operation can be easily performed.

Next, a third embodiment of the present invention will be described with reference to FIGS.

The locking mechanism 21 according to the intraocular lens insertion instrument 1 shown in FIG. 9 includes a latching means 51 for fixing the lens push-out mechanism 6 and a fixed shaft member 52 for fixing the lens 2 from the front.

As shown in FIG. 10, the hooking means 51 includes a projecting portion 53 and a tab 54 that is a support member for supporting the projecting portion 53. As shown in FIG. 11, the latching means 51 inserts a protrusion 53 into a lock hole 55 provided in the lens push-out mechanism 6 through a through hole formed in the main body 5 to cause the lens push-out mechanism 6 to move. Hang. The lock hole 55 is formed in accordance with the position where the tip of the lens push-out mechanism 6 contacts the rear of the lens 2 installed in the lens installation unit 3. The tab 54 is fixed to the outer shell of the main body 5 so as to be separated.

As shown in FIG. 11, the fixed shaft member 52 is provided integrally with a cap member 42 that protects the front end of the main body 5, is inserted from the front end opening 5 a of the main body 5, and is installed in the lens installation portion 3. 2 has a length in contact with the front.

The main body 5 includes a guide hole 56 that holds the lens push-out mechanism 6 coaxially with the cylindrical portion 4, the lens installation portion 3 that includes the opening 20, the cylindrical portion 4, a tapered portion 9, and a gripping portion. It consists of 13. The opening 20 is provided with a cover body 46 that can be opened and closed. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6.

Next, a procedure for installing the lens 2 in the intraocular lens insertion device 1 according to the present embodiment will be described. In the latching means 51, the tab 54 is adhered to the main body 5 in a state where the projection 53 is fitted in the lock hole 55, and the lens pushing mechanism 6 is fixed to the main body 5. Further, the fixed shaft member 52 is inserted from the front end 5 a of the main body 5, the cap member 42 is fixed to the front end of the main body 5, and the fixed shaft member 52 is attached to the main body 5. In this state, the lens 2 is inserted from the opening 20. The lens 2 is installed at a position where the rear of the inserted lens 2 comes into contact with the lens push-out mechanism 6 and the front comes into contact with the fixed shaft member 52. Next, the cover body 46 is closed and the opening 20 is closed. In this way, the lens 2 can be fixed by the lens push-out mechanism 6 and the fixed shaft member 52, and the lens push-out mechanism 6 can be fixed by the hooking member, so that the lens push-out mechanism 6 can be prevented from popping out due to an operation error. . In addition, since the tip portion is protected by the cap member 42, it is possible to prevent damage due to breakage or adhesion of foreign matter. Furthermore, since the lens push-out mechanism 6 also functions to hold the rear of the lens 2, a simple configuration can be achieved.

In use, the tab 54 is separated and the projection 53 is inserted into and removed from the lock hole 55. At the same time, the fixed shaft member 52 is inserted into and removed from the cylindrical portion 4 by removing the cap member 42 from the tip of the main body 5. Thereby, by moving the lens push-out mechanism 6 forward, the lock mechanism 21 can be released and the state of use can be shifted.

By configuring as described above, the lens cannot be pushed out unless the tabs are separated from each other, so that it is possible to reliably prevent an operation error and to easily shift to a use state simply by separating the tabs.

As described above, in the intraocular lens insertion device 1 according to the present embodiment, the cylindrical portion 4 is detachably provided with the cap member 42 that protects the tip of the cylindrical portion 4, and the cap member 42 includes the lens 2. Since the fixed shaft member 52 for fixing the lens 5 is provided, the tip of the main body 5 is protected by the cap member 42 provided with the fixed shaft member 52, and the lens 2 can be reliably prevented from popping out. In addition, the tip can be protected from adhesion of foreign matters.

Further, since the support member 23 is composed of a tab 54 that can be separated from the main body 5, the latching means 51 can be released simply by separating the tab 54 from the main body 5, and can be operated more easily.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The intraocular lens insertion device 1 shown in FIG. 12 includes a main body 5, a plunger 25 that is a lens push-out mechanism 6, and a lock mechanism 21.

The lock mechanism 21 restricts the forward movement of the lens pushing mechanism 6 and holds the lens, the cap member 42 that protects the front end of the main body 5, the holding member 22, and the cap member. And a support member 23 for supporting 42. The holding member 22 includes a front holding portion 22 a that fixes the front of the lens 2 and a rear holding portion 22 b that fixes the rear of the lens 2. The support member 23 includes an expansion / contraction portion 61 that can expand and contract in the length direction between the holding member 22 and the cap member 42.

As shown in FIG. 13, the main body 5 includes a guide hole 56 that holds the lens pushing mechanism 6 coaxially with the cylindrical portion 4, a lens installation portion 3 that includes an opening 20, and a surface that faces the opening 20. The through hole into which the holding member 22 of the lock mechanism 21 is inserted, the cylindrical portion 4, the tapered portion 9, and the grip portion 13. The opening 20 is formed on the side surface of the main body 5 to which the lock mechanism 21 is not attached. The opening 20 is provided with a cover body 46 that can be opened and closed. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6.

Next, a procedure for installing the lens 2 in the intraocular lens insertion device 1 according to the present embodiment will be described. The lock mechanism 21 is attached to the intraocular lens insertion instrument 1 by inserting the holding member 22 into the through hole and further covering the cap member 42 at the distal end of the main body 5. At this time, since the expansion / contraction part 61 is provided between the holding member 22 and the cap member 42, the cap member 42 can be easily attached even after the holding member 22 is inserted. Next, the lens 2 is inserted from the opening 20. The inserted lens 2 is installed between the rear holding part 22b and the front holding part 22a. Next, the cover body 46 is closed and the opening 20 is closed. By doing so, the lens 2 can be fixed by the holding member 22 and the lens push-out mechanism 6 can be fixed by the latching member, so that the lens push-out mechanism 6 can be prevented from popping out due to an operation error. Moreover, since the tip of the main body 5 is protected by the cap member 42, it is possible to prevent damage due to breakage or adhesion of foreign matter.

In use, the support member 23 is separated and the holding member 22 is inserted and removed from the through hole. Thereby, the lock mechanism 21 is released, and at the same time, the cap member 42 can be removed from the front end of the main body 5 to shift to a use state.

With this configuration, the lens 2 cannot be pushed out unless the lock mechanism 21 is removed, so that an operation error can be prevented, and at the same time, the tip of the main body 5 can be prevented from being contaminated by bacteria.

Next, a modification of the present embodiment will be described with reference to FIG. A lock mechanism 21 shown in FIG. 14 includes a holding member 22 that holds the lens 2 in the front-rear direction and a support member 23 that supports the holding member 22. The holding member 22 includes a step portion 62 that holds the lens 2 by forming a gap between the inner surface of the main body 5 and the lens 2. The holding member 22 is provided in the main body 5 and is detachably provided in a direction perpendicular to the lens traveling axis A.

In order to install the lens 2 in the intraocular lens insertion instrument 1 according to this modification, the holding member 22 is inserted into the through hole and the lock mechanism 21 is attached to the main body 5. Next, the lens 2 is inserted, and the lens 2 is placed on the stepped portion 62 between the holding members 22. By installing the lens 2 in this manner, the lens 2 is held in a state where a gap is formed between the lens 2 and the inner surface of the lens installation portion 3. At this time, the lens 2 is held coaxially with the lens pushing mechanism 6.

In use, the support member 23 is removed from the main body 5 and the holding member 22 is moved in a direction substantially perpendicular to the lens traveling axis A. At this time, the lens 2 comes into contact with the inner surface of the lens installation portion 3 when the stepped portion 62 becomes lower than the inner surface of the lens installation portion 3. Further, when the holding member 22 is moved in the vertical direction to be removed from the main body 5 and the lock is released, it is possible to shift to the use state. By providing the stepped portion on the holding member 22 in this manner, the lens 2 comes into contact with the inner surface of the lens installation portion 3 for the first time when in use, so that the lens 2 can be prevented from coming into close contact with the inner surface of the lens installation portion 3 and Can be extruded.

As described above, the intraocular lens insertion device 1 according to the present embodiment is configured such that the lock mechanism 21 holds the lens 2 by forming a gap between the lens installation portion 3 and the lens 2. Therefore, since the lens 2 comes into contact with the inner surface of the lens installation portion 3 for the first time during use, the lens 2 can be prevented from coming into close contact with the inner surface of the lens installation portion 3, and the lens 2 can be pushed out easily.

The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the lens 2 may be configured to be installed with a gap formed between the main bodies 5. By doing so, it becomes easy for the lubricant to enter between the lens 2 and the main body 5, so that the lens 2 can be pushed out smoothly.

It is a whole perspective view which shows the structure of the instrument for intraocular lens insertion which concerns on 1st Example of this invention. It is a perspective view which shows the structure of an installation part same as the above. It is a perspective view which shows the state which mounted | wore with the cover member same as the above. It is sectional drawing which shows an installation part same as the above, (a) The cross-sectional view which shows the state before pushing out a lens, (b) The longitudinal cross-sectional view which shows the state which reached the inclined surface, (c) The lock mechanism is deformed It is a longitudinal cross-sectional view which shows the state by which the lock was released. It is a cross-sectional view which shows a modification same as the above, (a) The state which a plunger can move independently, (b) It is a figure which shows the state which a plunger and a slider can move interlockingly. It is a top view which shows another modification same as the above, (a) The state in which the lens was hold | maintained at the lock mechanism, (b) It is a figure which shows the state by which the lock mechanism was cancelled | released by the lens pushing mechanism. It is a perspective view which shows the structure of the instrument for intraocular lens insertion which concerns on 2nd Example of this invention. It is a cross-sectional view same as the above. It is a top view which shows the structure of the instrument for intraocular lens insertion which concerns on 3rd Example of this invention. It is a perspective view which shows the structure of a latching member same as the above. It is a cross-sectional view same as the above. It is a perspective view which shows the structure of the instrument for intraocular lens insertion which concerns on 4th Example of this invention. It is a cross-sectional view same as the above. It is a longitudinal cross-sectional view which shows a modification same as the above.

DESCRIPTION OF SYMBOLS 1 Intraocular lens insertion instrument 2 Lens 3 Lens installation part 4 Tube part 5 Main body 6 Lens pushing mechanism
21 Locking mechanism
22 Holding member
23 Support member
24 Inclined surface
25 Plunger
26 Slider
27 Contact part A Lens travel axis

Claims (7)

  1. In an intraocular lens insertion instrument comprising a main body comprising a lens installation part in which a lens is installed and a cylindrical part for introducing the lens, and a lens push-out mechanism for pushing out the lens installed in the lens installation part. And a lock mechanism for fixing the lens to the lens installation portion , and the lock mechanism is configured to be released by moving or deforming the lock mechanism, and the lock mechanism is coaxial with the lens push-out mechanism. An intraocular lens insertion device configured to release the lock mechanism by moving the lens pushing mechanism in the lens direction.
  2. 2. The intraocular lens insertion device according to claim 1, wherein the lock mechanism is provided so as to be movable or deformable in a direction substantially perpendicular to a moving axis of the lens pushed out by the lens push-out mechanism.
  3. The intraocular lens insertion device according to claim 1, wherein the lock mechanism includes a holding member that is provided around the lens and holds the lens, and a support member that supports the holding member.
  4. The intraocular lens insertion device according to claim 1, wherein the lock mechanism is configured to hold a lens by forming a gap between the lens installation portion and the lens. Instruments.
  5. The said support member is provided in the said lens installation part so that elastic deformation is possible, It comprised so that the said locking mechanism might be deformed by the operation | movement which the said lens pushing mechanism pushes out a lens, The any one of Claims 1-4 characterized by the above-mentioned. The intraocular lens insertion device according to claim 1.
  6. The lens pushing mechanism includes a plunger for pushing out a lens and a slider having a lens contact portion larger than the plunger, and the slider pushes the lens to deform the lock mechanism. The instrument for inserting an intraocular lens according to 4 or 5.
  7. The intraocular lens insertion device according to claim 6, wherein the plunger and the slider are configured to push the lens in conjunction with each other.
JP2004380871A 2004-12-28 2004-12-28 Intraocular lens insertion device Active JP4766442B2 (en)

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JP2004380871A JP4766442B2 (en) 2004-12-28 2004-12-28 Intraocular lens insertion device
PCT/JP2005/022278 WO2006070561A1 (en) 2004-12-28 2005-12-05 Instrument for inserting intraocular lens

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JP2006181269A (en) 2006-07-13

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