JP2022039196A - Intraocular lens insertion instrument - Google Patents

Abstract

To provide a technique for reducing an operator's burden of handling a screw type insertion instrument.SOLUTION: An intraocular lens insertion instrument 1 by which an intraocular lens having an optical portion with an optical function is moved forward while being folded and is released from a nozzle 7b, includes: a rotary member rotatable using forward and backward directions thereof as an axial direction; a slider 6 capable of moving forward; and a moving body that pushes out the intraocular lens to release it from the nozzle 7b. In the intraocular lens insertion instrument 1, the rotary member rotates without moving forward and moving backward, thereby moves the moving body and the slider 6 forward, and first stops forward movement of the slider 6, the rotation of the rotary member and the forward movement of the moving body are interlocked, and the rotation of the rotary member and the forward movement of the slider 6 are interlocked, whereas the moving body and the slider 6 are independently moved forward.SELECTED DRAWING: Figure 6

Description

The present invention relates to an intraocular lens insertion device.

In cataract surgery, removal of the opaque crystalline lens by ultrasonic emulsification and implantation in the eye after removal of the crystalline lens are widely performed. At present, a soft intraocular lens made of a soft material such as a silicone elastomer is inserted into the eye using an intraocular lens insertion device.

When a flexible intraocular lens is inserted into the eye, the intraocular lens can be folded and the incision in the cornea can be reduced.

As a method of folding an intraocular lens, a method of folding it in an intraocular lens insertion device is known.

Patent Document 1 describes an inserter body provided with a lens mounting portion on which an intraocular lens is installed so that vibration or the like is less likely to occur during operation when using an intraocular lens insertion device. A rotating member that is connected to the rear end of the inserter body and is rotatable around the axis of the inserter body without moving in the axial direction of the inserter body, while the threaded portion of 1 is formed. It has a hollow body and a second screw portion that meshes with the first screw portion from the initial state before use, and when the rotating member is rotated, the first screw portion and the second screw portion are used. The eye is characterized by comprising a moving body that causes the intraocular lens to be released from the tip of the hollow body by moving in the axial direction of the inserter body independently of the rotating member by meshing with the portion. An intraocular lens insertion device is disclosed (claim 1, [0008] of Patent Document 1). The intraocular lens insertion device that advances the moving body by rotating the rotating member in this way is hereinafter also referred to as a screw type insertion device.

Japanese Patent No. 6276619

In the screw type insertion instrument described in Patent Document 1, the operator moves a tab (a pair of left and right wing portions 6b described in Patent Document 1) to advance the slider. That is, the operator needs two actions: to advance the slider using the tab and to advance the moving body (plunger and / or rod) by rotating the rotating member. If the two actions can be combined into one, the burden on the surgeon will be reduced.

The technical subject of the present invention is to reduce the burden on the operator when handling the screw type insertion instrument.

The first aspect of the present invention is
An intraocular lens insertion device that advances an intraocular lens equipped with an optical unit having an optical function while folding it and emits it from a nozzle.
A rotating member that can rotate around the front and back,
With a slider that can be moved forward,
A moving body that pushes out the intraocular lens and emits it from the nozzle.
Equipped with
By rotating the rotating member, the moving body and the slider are advanced and the advance of the slider is stopped first.
An intraocular lens in which the rotation of the rotating member and the advance of the moving body are interlocked, and the rotation of the rotating member and the advance of the slider are interlocked, while the moving body and the slider each advance independently. It is an insertion device.

The second aspect of the present invention is the aspect described in the first aspect.
The rotating member rotates without advancing and retreating.

The third aspect of the present invention is the aspect described in the first or second aspect.
An inserter body provided with a lens mounting portion on which the intraocular lens is installed and a first screw portion are formed, and the inserter body is rotated around the axis without moving in the axial direction of the inserter body. Further comprising a hollow body having the rotatable member,
The moving body has a second screw portion that meshes with the first screw portion, and when the rotating member is rotated, the first screw portion and the second screw portion mesh with each other. Move forward by
The slider has a third screw portion that meshes with the first screw portion, and when the rotating member is rotated, the slider advances by meshing between the first screw portion and the third screw portion. ..

The fourth aspect of the present invention is the aspect described in the third aspect.
The first threaded portion is formed inside the rotating member along the axial direction.
By rotating the rotating member and dropping the third screw portion to a portion where the first screw portion is not formed to release the engagement between the two, the advance of the slider is stopped first.

A fifth aspect of the present invention is the aspect described in the fourth aspect.
The portion inside the rotating member where the first screw portion is not formed is the front end inside the rotating member.
The third threaded portion of the slider is located in front of the second threaded portion of the moving body.

The sixth aspect of the present invention is the aspect described in any one of the third to fifth aspects.
The moving body has a second threaded portion that meshes with the first threaded portion from the initial state before use.
The slider has a third threaded portion that meshes with the first threaded portion from the initial state before use.

The seventh aspect of the present invention is the aspect described in any one of the first to sixth aspects.
The slider assists in folding the intraocular lens.

Other aspects of the invention that can be combined with respect to the above aspects are:

The rotating member is preferably connected to the rear end of the inserter body.

The slider advances to deform the intraocular lens into a predetermined shape.
It is preferable that the moving body pushes out the intraocular lens deformed by the slider and discharges it from the nozzle.

It is preferable that a part of the slider can be arranged above the intraocular lens when the intraocular lens is folded.

The length (front-back width) of the third screw portion is the length (front-back width) of the portion N in which the first screw portion is not formed so that the third screw portion can be dropped from the portion N in which the first screw portion is not formed. It is preferably smaller than the length (front-back width). As the actual size at that time, for example, the length (front-back width) of the third screw portion is 0.5 to 5.0 mm, and the length (front-back width) of the portion N is 1.0 to 6.0 mm.

The second screw portion provided on the moving body meshes with the predetermined position α of the first screw portion inside the rotating member, and the second screw portion advances along the rotating first screw portion. It is preferable that the moving body moves forward accordingly. Then, the third screw portion provided on the slider meshes with another predetermined portion β (a portion different from α in the front-rear direction) of the first screw portion inside the rotating member, and the second screw portion is engaged. Is preferably advanced along the rotating first threaded portion, with the slider moving forward accordingly.

The moving body is housed inside the hollow body without protruding from the rear end portion of the rotating member in the initial state before use, and moves inside the hollow body when the rotating member is rotated. Is preferable.

It is preferable to have a reverse rotation preventing mechanism for preventing the reverse rotation of the rotating member in the initial state before use.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a technique for reducing the burden on the operator when handling a screw type insertion instrument.

FIG. 1 is a perspective view showing a configuration example of the appearance of the intraocular lens insertion device according to the embodiment of the present invention. FIG. 2 is an exploded perspective view of the intraocular lens insertion device according to the embodiment of the present invention. 3A and 3B are top views of the slider, FIG. 3A is a slider described in Patent Document 1, and FIG. 3B is a slider according to the present embodiment. FIG. 4 is a top view of a state in which a slider and a plunger to which a rod is connected are combined, FIG. 4A is the state described in Patent Document 1, and FIG. 4B is the present embodiment. This is the state. FIG. 5 is a schematic view of a transmission side surface in an initial state before use of the intraocular lens insertion device according to the present embodiment. 6A and 6B are schematic transmission side views of the intraocular lens insertion device according to the present embodiment, FIG. 6A is the same diagram as FIG. 5, and is a diagram in an initial state before use, FIG. 6B. ) Is a diagram when the third screw portion of the slider falls off to the portion N, and FIG. 6 (c) shows the movement even after the third screw portion of the slider falls off to the portion N and the advance of the slider is stopped. It is a figure which shows how the body moves forward. FIG. 7 is a perspective view showing a configuration example of the appearance of the intraocular lens insertion device described in Patent Document 1. FIG. 8 is a schematic transmission side view of a modified example of the intraocular lens insertion device according to the present embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present specification, "to" refers to a predetermined value or more and a predetermined value or less.

In the present embodiment, in explaining the relative positional relationship of each part of the intraocular lens insertion device, the direction of operation, etc., one of the X-axis directions is the X1 direction, the other is the X2 direction, and one of the Y-axis directions is used. The Y1 direction, the other is the Y2 direction, one of the Z-axis directions is the Z1 direction, and the other is the Z2 direction. The X1 direction is the front end side (front, lens traveling direction), the X2 direction is the rear end side (rear), the Y1 direction is the left side (left side), the Y2 direction is the right side (right side), and the Z1 direction is the upper side (upper side). The thickness direction and the optical axis direction when the intraocular lens is placed) and the Z2 direction are defined as the lower side (lower side). Of these, the X1 direction and the X2 direction correspond to the length direction of the intraocular lens insertion device 1 (in other words, the axial direction), and the Y1 direction and the Y2 direction correspond to the width direction of the intraocular lens insertion device. However, the Z1 direction and the Z2 direction correspond to the height direction of the intraocular lens insertion device 1.

In the present embodiment, a preload-type screw-type insertion device equipped with an intraocular lens in advance is exemplified, but the present invention is not limited thereto. Further, the present invention exemplifies a screw type insertion device integrally formed by injection molding and disposable, but the present invention is not limited thereto.

<Basic configuration of the intraocular lens insertion device according to this embodiment>
In the present embodiment, as an example of an intraocular lens, a one-piece type intraocular lens made of a soft material such as silicone elastomer or soft acrylic, and a circular effective optical portion and its peripheral portion that perform an optical function are provided. It is intended to handle an intraocular lens having an optical portion provided and two support portions curved outward from two locations on the outer peripheral portion of the optical portion.

The case where the optical portion of the intraocular lens and the proximal end side of the support portion connected to the optical portion are made of a soft material is illustrated. This configuration facilitates folding of the intraocular lens. Similarly, the terminal side of the support portion may be made of a soft material or a hard material (eg, polyethylene, PMMA, etc.).

The effective optical portion in the optical portion has a shape that exerts an optical function, and the peripheral portion is formed in an annular shape around the effective optical portion, and the annular portion has a flat plate shape. Of course, other configurations may be adopted. For example, the optical unit may be composed of only the effective optical unit. Further, the peripheral edge portion may be formed continuously with the effective optical portion, that is, the peripheral edge portion and the effective optical portion may be smoothly connected to form a continuous surface.

FIG. 1 is a perspective view showing a configuration example of the appearance of the intraocular lens insertion device according to the embodiment of the present invention.
FIG. 2 is an exploded perspective view of the intraocular lens insertion device according to the embodiment of the present invention.

As a basic configuration, as shown in FIGS. 1 and 2, the intraocular lens insertion device 1 includes an inserter body 5, a slider 6, an insertion tube 7, a screw body 8 as a rotating member, and a plunger 9. , And a rod 10. The slider 6 is attached to the inserter main body 5. The inserter body 5, the insertion cylinder 7, and the screw body 8 are connected to each other to form a hollow body. Further, the plunger 9 and the rod 10 form a moving body by being connected to each other. In forming the hollow body, the insertion cylinder 7 is connected to the tip end portion of the inserter body 5, and the screw body 8 is connected to the rear end portion of the inserter body 5. Further, in forming the moving body, the rod 10 is connected to the tip end portion of the plunger 9. The moving body including the plunger 9 and the rod 10 is housed inside the hollow body including the inserter main body 5, the insertion cylinder 7, and the screw body 8.

The inserter body 5 is formed in a cylindrical shape as a whole. A lens mounting portion 11 is provided at the tip of the inserter main body 5. The intraocular lens is installed in this lens installation part.

The slider 6 is attached to the inserter main body 5. By advancing the slider 6, the intraocular lens is advanced and bent into a valley fold shape (bend downward) along the narrowing inner diameter of the insertion cylinder main body 7a. The bent intraocular lens is advanced by the plunger 9 and thus by the rod, and is discharged from the nozzle 7b.

When folding into a valley fold shape, a part of the slider 6 is arranged above the intraocular lens. With this arrangement, it is possible to prevent the intraocular lens from being folded (folded upward) when the intraocular lens (particularly the optical portion) is deformed by the advancement of the slider 6. The slider 6 will be described in detail later.

The insertion tube 7 is for folding the intraocular lens into a small size and guiding the intraocular lens into the eye when the intraocular lens installed in the lens mounting portion is inserted into the eye. The insertion tube 7 has a hollow insertion tube main body 7a and a thin tubular nozzle 7b.

The insertion tube 7 is attached to the tip of the inserter body 5. At that time, the lens installation portion 11 of the inserter main body 5 is housed and arranged in the insert cylinder main body 7a of the insert cylinder 7.

The nozzle 7b is formed at the tip of the insertion cylinder 7. The tip of the nozzle 7b is opened with an oblique cut. The tip of the nozzle 7b is a portion to be inserted into the incision of the eyeball when the intraocular lens is inserted into the eye using the inserter body 5.

The screw body 8 is coaxially connected to the rear end portion of the inserter body 5. In this connected state, the screw body 8 is rotatably supported around the axis of the inserter body 5.

The screw body 8 is formed in a cylindrical shape. The front end and the rear end of the screw body 8 are circularly open, respectively. A plurality of ridges 8a are formed on the outer peripheral surface of the screw body 8. Each ridge portion 8a is formed parallel to the longitudinal direction of the screw body 8. Further, a total of eight ridge portions 8a are formed at a uniform angular pitch in the circumferential direction of the screw body 8. The screw body 8 is a portion that is rotated by the user. At that time, if a plurality of ridges 8a are formed on the outer peripheral surface of the screw body 8, the user's finger is caught on the ridges 8a, so that the screw body 8 can be easily rotated.

As shown in FIGS. 5 and 6, a first screw portion 8b is formed on the inner peripheral surface of the screw body 8. The first screw portion 8b constitutes a female screw. The first screw portion 8b is formed over almost the entire axial direction of the screw body 8. However, in the present embodiment, a portion N in which the first screw portion 8b is not provided is intentionally provided in almost the entire area in the axial direction.

The plunger 9 moves (advances) in the hollow portion of the inserter main body 5 and the screw body 8 in the axial direction of the inserter main body 5. The plunger 9 is formed in a substantially prismatic shape. In the initial state before use, the plunger 9 is arranged in a state of being inserted inside the screw body 8 so as not to protrude from the rear end portion of the screw body 8.

A connecting hole is formed on the tip surface of the plunger 9. The connecting hole is for connecting the rod 10 to the tip end portion of the plunger 9.

A convex portion is formed on the upper surface of the tip of the plunger 9, and a concave groove is formed on the inner peripheral surface of the inserter body 5 correspondingly. The concave groove guides the plunger 9 so as to be movable in the axial direction of the inserter main body 5 by engaging with the convex portion.

A second screw portion 9c is formed at the rear end portion of the plunger 9. The second screw portion 9c constitutes a male screw and is always maintained in a state of being meshed with the first screw portion 8b of the screw body 8. The second threaded portion 9c may be formed in pairs at the top and bottom of the plunger 9. However, as shown in FIG. 5, even if only one second screw portion 9c is formed instead of a pair, if the screw body 8 rotates, a female screw (concave) inside the screw body 8 is formed. The second threaded portion 9c comes into contact with the protrusion 8b', and the second threaded portion 9c is pushed forward. In this embodiment, this example is given.

When the intraocular lens insertion device 1 is used, the screw body 8 is operated so as to rotate around the axis of the inserter body 5, thereby moving the plunger 9 forward. The movement start position of the plunger 9 at that time is uniquely determined by abutting the rear end portion of the plunger 9 against the abutting portion arranged at the rear end of the inner circumference of the screw body 8.

The rod 10 discharges the intraocular lens installed in the lens installation portion from the opening of the nozzle 7b of the insertion cylinder 7. In the present embodiment, the moving body (rod 10 and thus the plunger 9) pushes out the intraocular lens deformed into a predetermined shape (valley fold shape) by the slider 6 and discharges it from the nozzle 7b. The rod 10 is formed in the shape of an elongated rod. In the present embodiment, an example in which the plunger 9 and the rod 10 are separate bodies is given, but these may be integrally molded.

The operation of the intraocular lens insertion device 1 is performed by rotating the screw body 8 in one direction (hereinafter, also referred to as “forward rotation”). At this time, the first screw portion 8b of the screw body 8 and the second screw portion 9c of the plunger 9 are always in mesh with each other, including the initial state before use. Therefore, when the screw body 8 is rotated in the forward direction, the plunger 9 starts to move to the inserter body 5 side (forward) at the same time.

If the user mistakenly tries to rotate the screw body 8 in the opposite direction under the initial state before use, the rear end portion of the plunger 9 abuts on the abutting portion of the screw body 8. Therefore, the reverse rotation (erroneous operation) of the screw body 8 is prevented. That is, the abutting portion of the screw body 8 and the rear end portion of the plunger 9 that abuts against the abutting portion form a reverse rotation preventing mechanism that prevents the reverse rotation of the screw body 8 in the initial state before use.

By the way, the forward rotation of the screw body 8 means that the plunger 9 (in addition to the slider 6 in this embodiment) moves forward due to the engagement between the screw portions when the screw body 8 is rotated. Refers to the rotation of.

For the contents not described above, the configuration of the screw type insertion instrument described in Patent Document 1 shall be adopted, and the description of Patent Document 1 shall be fully described in the present specification. For example, a specific example of the "rotating member" is the screw body 8 of Patent Document 1. A specific example of the "moving body" is the plunger 9 and the rod 10 of Patent Document 1. A specific example of the "hollow body" is an inserter body 5, an insertion cylinder 7, and a screw body 8.

<Characteristic part of the intraocular lens insertion device according to this embodiment>
3A and 3B are top views of the slider, FIG. 3A is a slider described in Patent Document 1, and FIG. 3B is a slider according to the present embodiment.
FIG. 4 is a top view of a state in which a slider and a plunger to which a rod is connected are combined, FIG. 4A is the state described in Patent Document 1, and FIG. 4B is the present embodiment. This is the state.
Hereinafter, the part of the configuration (example: FIG. 4A) described in Patent Document 1 corresponding to the present embodiment (example: FIG. 4B) is designated by a value obtained by multiplying the same reference numeral by 100 (reference numeral: FIG. 4A). Example: reference numeral 6c → reference numeral 600c).
FIG. 5 is a schematic view of a transmission side surface in an initial state before use of the intraocular lens insertion device according to the present embodiment.
6A and 6B are schematic transmission side views of the intraocular lens insertion device according to the present embodiment, FIG. 6A is the same diagram as FIG. 5, and is a diagram in an initial state before use, FIG. 6B. ) Is a diagram when the third screw portion of the slider falls off to the portion N, and FIG. 6 (c) shows the movement even after the third screw portion of the slider falls off to the portion N and the advance of the slider is stopped. It is a figure which shows how the body moves forward.

The configuration of the characteristic portion of the intraocular lens insertion device according to the present embodiment is as follows.
"It is an intraocular lens insertion device that advances an intraocular lens equipped with an optical unit having an optical function while folding it and emits it from a nozzle.
A rotating member that can rotate around the front and back,
With a slider that can be moved forward,
A moving body that pushes out the intraocular lens and emits it from the nozzle.
Equipped with
By rotating the rotating member, the moving body and the slider are advanced and the advance of the slider is stopped first.
An intraocular lens in which the rotation of the rotating member and the advance of the moving body are interlocked, and the rotation of the rotating member and the advance of the slider are interlocked, while the moving body and the slider each advance independently. Insertion device. "

If the above configuration is adopted, not only the moving body (plunger 9 and / or rod 10. Hereinafter, this description is omitted) but also the slider 6 can be advanced by rotating the rotating member. Therefore, the surgeon can appropriately discharge the intraocular lens from the nozzle 7b by one action. As a result, the burden on the operator when handling the screw type insertion instrument can be reduced.

Although the specific configuration will be described in detail, as shown in FIGS. 5 and 6A, a second screw portion 8b inside the rotating member is provided with a second screw portion α with respect to a predetermined portion α. The threaded portion 9c meshes, the second threaded portion 9c advances along the rotating first threaded portion 8b, and the moving body advances accordingly (FIG. 6 (a) → FIG. 6 (b)).

Then, as shown in FIGS. 5 and 6 (a), the slider is provided with respect to another predetermined portion β (a portion different from α in the front-rear direction) of the first screw portion 8b inside the rotating member. The third screw portion 6i meshes with the third screw portion 6i, the third screw portion 6i advances along the rotating first screw portion 8b, and the slider 6 advances accordingly (FIGS. 6A → 6B). ). As the rotating member continues to rotate, as shown in FIG. 6B, the third screw portion 6i falls off to the portion N where the first screw portion 8b is not formed. As a result, the advance of the slider 6 can be stopped first. On the other hand, as shown in FIG. 6 (c), the moving body continues to move forward.

As this aspect shows, the moving body and the slider 6 each move forward independently. This "independent advance" means that the advance of the moving body is not involved or is less involved in the advance of the slider 6. That is, the state in which the slider 6 is advanced is excluded because the slider 6 is connected to the moving body and the moving body is advanced. However, it does not prevent the slider 6 from coming into contact with the moving body (hence, the expression "less involved" is used). "Independent advance" is, for example, a state in which a majority (preferably 80% or more, more preferably 100%) of the force for advancing the slider 6 is provided by the rotating member.

<Specific example of slider>
The slider 6 is configured to include a tip portion 6a and a pair of left and right leg portions 6c. The tip portion 6a is arranged at the tip portion of the slider 6. The tip portion 6a has a lens contact portion. The lens contact portion is a portion that comes into contact with the intraocular lens when the intraocular lens is deformed into a predetermined shape by moving the slider 6.

FIG. 7 is a perspective view showing a configuration example of the appearance of the intraocular lens insertion device described in Patent Document 1.

In Patent Document 1, a pair of left and right wing portions (reference numeral 600b in FIG. 7) are formed on the slider, but they are not formed as shown in FIG. 1 in the present embodiment. This is because the slider 6 can be advanced by the rotation of the screw body 8 even if there is no pair of left and right wings (tabs).

The pair of legs 6c are arranged inside the inserter main body 5 so as to be along the inner surface of the outer wall of the inserter main body 5. As shown in FIG. 3A, in Patent Document 1, a stopper portion 600g is formed on each leg portion 600c, but it is not formed in the present embodiment. Even if there is no stopper portion 600g that constitutes the reverse return prevention mechanism of the slider 600, the slider 6 can be advanced by dropping the third screw portion 6i of the slider 6 to the portion N where the first screw portion is not formed. This is because the retreat (reverse) can also be stopped.

As shown in FIGS. 3 (a) and 3 (b) and 4 (a) and (b), the pair of leg portions 6c of the present embodiment are stretched as compared with Patent Document 1. A third screw portion 6i is formed in this stretched portion (rear end portion). The third screw portion 6i constitutes a male screw, and is maintained in a state of meshing with the first screw portion 8b of the screw body 8 before the rotation of the screw body 8.

As used herein, the term "meshing" refers to a state in which the object in contact with the first screw portion 8b advances due to the rotation of the screw body 8, and as shown in FIGS. 5 and 6, the second plunger has a second position. The state of being fitted into the concave portion of the female screw is included as in the threaded portion 9c of the above, and the state of being in contact with the concave portion of the female screw is included as in the third threaded portion 6i of the slider 6. "Matching" may be paraphrased as "engaging".

The third threaded portion 6i may be formed in pairs at the top and bottom of the slider 6. However, as shown in FIG. 5, even if only one third screw portion 6i is formed instead of a pair, if the screw body 8 rotates, a female screw (concave) inside the screw body 8 is formed. The third screw portion 6i comes into contact with the protrusion 8b', and the third screw portion 6i is pushed forward. In this embodiment, this example is given.

An inserter body provided with a lens mounting portion on which an intraocular lens is installed and a first screw portion are formed and connected to the rear end portion of the inserter body in the axial direction of the inserter body. A hollow body having the rotating member (screw body 8 in this embodiment) that can rotate around the axis of the inserter body without moving.
It has a second screw portion 9c that meshes with the first screw portion from the initial state before use, and when the rotating member is rotated, the first screw portion and the second screw portion 9c With the moving body (plunger 9 in this embodiment), the intraocular lens is discharged from the nozzle at the tip of the hollow body by moving (advancing) in the axial direction of the inserter body by meshing.
It has a third screw portion 6i that meshes with the first screw portion from the initial state before use, and when the rotating member is rotated, the first screw portion and the third screw portion 6i are connected to each other. The slider 6 that deforms the intraocular lens into a predetermined shape by moving (advancing) in the axial direction of the inserter body by meshing with the slider 6.
It is preferable to provide.
The difference from the description of Patent Document 1 in this paragraph is that the slider 6 is provided with a third screw portion 6i that meshes with the first screw portion.

It is preferable that the first threaded portion is formed inside the rotating member along the axial direction. Then, the rotating member is continuously rotated, and the third screw portion 6i is dropped to the portion where the first screw portion is not formed to release the engagement between the two, thereby advancing the slider 6 first. It is preferable to stop. As used herein, "continuing rotation" means rotating a plurality of times, and includes stopping the rotation in the middle and then restarting the rotation.

The above preferred example will be described in detail below.

As shown in FIG. 5, a second screw portion 9c provided on the moving body meshes with a predetermined portion α of the first screw portion 8b inside the rotating member, and the second screw portion 9c rotates. 1 advances along the threaded portion 8b, and the moving body advances accordingly. This configuration and the mechanism by which the second screw portion 9c (and the third screw portion 6i described in the lower paragraph) advances are as described in Patent Document 1.

Then, the third screw portion 6i provided on the slider 6 meshes with another predetermined portion β of the first screw portion 8b inside the rotating member, and the second screw portion 9c is the rotating first screw. The slider 6 advances along the portion 8b, and the slider 6 advances accordingly.

As shown by the change from FIG. 6 (a) to FIG. 6 (b), the moving body (plunger 9) and the slider 6 both move forward, but the slider 6 moves forward due to the force from the rotating member. It is not moving forward by the force of the body moving forward.

The portion N on the inside of the rotating member where the first screw portion 8b is not formed is preferably the front end inside the rotating member. In addition, the third screw portion 6i of the slider 6 is preferably located in front of the second screw portion 9c of the moving body. As a result, the slider 6 and the moving body can be advanced by one action without requiring a complicated configuration, and the advance of the slider 6 can be stopped first.

FIG. 8 is a schematic transmission side view of a modified example of the intraocular lens insertion device according to the present embodiment.

As shown in FIG. 8, when the third screw portion 6i of the slider 6 is located behind the second screw portion 9c of the moving body, the first screw portion inside the rotating member. The portion N in which the screw portion 8b is not formed is the second screw portion 9c and the second screw portion 9c on the rear side inside the rotating member, near the front of the third screw portion 6i, and in the front-rear direction (X1-X2 direction). It may be arranged between the screw portion 6i of 3 and the screw portion 6i. In this configuration, shortly after the start of rotation of the rotating member, the third screw portion 6i falls off to the portion N where the first screw portion 8b is not formed, and the second screw portion 9c continues to move forward. And, by extension, the moving body can continue to move forward.

The first screw portion 8b is formed in the length (front-back width) of the third screw portion 6i so that the third screw portion 6i can be dropped from the portion N in which the first screw portion 8b is not formed. It is preferably smaller than the length (front-back width) of the missing portion N. As the actual size at that time, the length (front-back width) of the third screw portion 6i is, for example, 0.5 to 5.0 mm, and the length (front-back width) of the portion N is 1.0 to 6.0 mm. ..

By adopting the above configuration, the following effects are obtained in addition to the effects of the present invention. The intraocular lens insertion device according to this embodiment is assumed to be operated by an operator. On the other hand, even when the insertion of the intraocular lens is automated, the intraocular lens insertion device according to the present embodiment can be used. For example, the intraocular lens can be automatically inserted by activating an actuator that meshes with a plurality of ridges 8a formed on the surface of the rotating member (screw body 8) described in Patent Document 1. In that case, a spiral groove is formed on the outside (outermost surface) of the rotating member instead of multiple ridges, and an actuator having a protrusion that meshes with the spiral groove and is movable forward is automatically activated. An intraocular lens may be inserted.

In addition, the preferred example and / or the modified example described in Patent Document 1 can be applied to this embodiment. The following is a list of some of them.

The moving body is housed inside the hollow body without protruding from the rear end portion of the rotating member in the initial state before use, and moves inside the hollow body when the rotating member is rotated. Is preferable.

It is preferable to have a reverse rotation preventing mechanism for preventing the reverse rotation of the rotating member in the initial state before use.

The technical scope of the present invention is not limited to the above-described embodiment, and includes various modifications and improvements to the extent that a specific effect obtained by the constituent requirements of the invention and the combination thereof can be derived.

For example, the present invention is not limited to the rotating member rotating without advancing and retreating. For example, a configuration may be adopted in which the rotating member slightly advances only when it starts to rotate. If such a configuration is adopted, after the rotating member has advanced somewhat, the rotating member continues to rotate without forward and backward, and the slider 6 and the plunger 9 advance and advance the slider 6 first. You may stop it.

In the above embodiment, an example in which the hollow body (screw body 8) is connected to the rear end portion of the inserter main body 5 is given. On the other hand, the screw body 8 and the inserter body 5 may not be connected to each other. After all, there is no limitation on the configuration as long as the slider 6 and the plunger 9 can be advanced by the rotation of the screw body 8.

In the above embodiment, an example is given in which the first screw portion and the second screw portion 9c mesh with each other from the initial state before use. On the other hand, the intraocular lens insertion device may adopt a structure in which the two do not mesh with each other in the initial state before use, and the two mesh with each other for the first time at the time of use.

In the above embodiment, an example is given in which the first screw portion and the third screw portion 6i mesh with each other from the initial state before use. On the other hand, the intraocular lens insertion device may adopt a structure in which the two do not mesh with each other in the initial state before use, and the two mesh with each other for the first time at the time of use.

In the above embodiment, an example of deforming the intraocular lens into a predetermined shape by moving the slider 6 is given. On the other hand, the present invention can be applied even to the slider 6 which does not deform the intraocular lens. For example, the slider 6 itself does not advance the intraocular lens, but the intraocular lens is advanced by a moving body (rod 10 or the like) with respect to a portion where the inner diameter of the inserter body 5 and / or the insertion cylinder 7 is narrowed. When folding the lens, a part of the slider 6 may be placed above the intraocular lens. More specifically, while the slider 6 advances with the advance of the intraocular lens, the slider 6 does not actively participate in the advance of the intraocular lens and advances in the intraocular until the intraocular lens has a valley fold shape. It may only be necessary to keep a part of the slider 6 above the lens.

With this arrangement, when the intraocular lens is bent while being pushed out by the rod 10 or the like in the insertion tube main body 7a where the inner diameter is narrowed, a part of the slider 6 is positioned above the intraocular lens, so that the intraocular lens can be moved. It is possible to avoid mountain folds (folded upwards).

Further, it is preferable that the slider 6 has a function of assisting the folding of the intraocular lens as in the above-described embodiment and the above-mentioned modification, but the present invention is not limited to this, and functions other than the folding of the intraocular lens are performed. The slider 6 to play may be adopted.

1 ... Intraocular lens insertion device 5 ... Insertor body 6 ... Slider 6a ... Tip 6c ... Pair of left and right legs 6g ... Stopper 6i ... Third screw part 7 ... Insert tube 7a ... Insert tube body 7b ... Nozzle 8 ... Screw body 8a ... Protrusion portion 8b ... First screw portion 8b'... Protrusion 9 forming a female screw (concave) ... Plunger 9c ... Second screw portion 10 ... Rod 500 ... Insertor body 600 ... Slider 600a ... Tip 600b ... Left and right pair of wings 600c ... Left and right pair of legs 600g ... Stopper 700 ... Insert tube 700a ... Insert tube body 700b ... Nozzle 800 ... Screw body 800a ... Protrusion 900 ... Plunger 900c ... Second screw Part 1000 ... Rod

Claims (7)

An intraocular lens insertion device that advances an intraocular lens equipped with an optical unit having an optical function while folding it and emits it from a nozzle.
A rotating member that can rotate around the front and back,
With a slider that can be moved forward,
A moving body that pushes out the intraocular lens and emits it from the nozzle.
Equipped with
By rotating the rotating member, the moving body and the slider are advanced and the advance of the slider is stopped first.
An intraocular lens in which the rotation of the rotating member and the advance of the moving body are interlocked, and the rotation of the rotating member and the advance of the slider are interlocked, while the moving body and the slider each advance independently. Insertion device. The intraocular lens insertion device according to claim 1, wherein the rotating member rotates without advancing and retreating. An inserter body provided with a lens mounting portion on which the intraocular lens is installed and a first screw portion are formed, and the inserter body is rotated around the axis without moving in the axial direction of the inserter body. Further comprising a hollow body having the rotatable member,
The moving body has a second screw portion that meshes with the first screw portion, and when the rotating member is rotated, the first screw portion and the second screw portion mesh with each other. Move forward by
The slider has a third screw portion that meshes with the first screw portion, and when the rotating member is rotated, the first screw portion and the third screw portion mesh with each other. The intraocular lens insertion device according to claim 1 or 2, which advances. The first threaded portion is formed inside the rotating member along the axial direction.
A claim for rotating the rotating member to cause the third screw portion to fall off to a portion where the first screw portion is not formed to disengage the engagement between the two, thereby stopping the advance of the slider first. Item 3. The intraocular lens insertion device according to item 3. The portion inside the rotating member where the first screw portion is not formed is the front end inside the rotating member.
The intraocular lens insertion device according to claim 4, wherein the third screw portion of the slider is located in front of the second screw portion of the moving body. The moving body has the second screw portion that meshes with the first screw portion from the initial state before use.
The intraocular lens insertion device according to any one of claims 3 to 5, wherein the slider has the third screw portion that meshes with the first screw portion from the initial state before use. The intraocular lens insertion device according to any one of claims 1 to 6, wherein the slider assists in folding the intraocular lens.

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