JP7453097B2 - Intraocular lens insertion device - Google Patents

Description

The present invention relates to an intraocular lens insertion device.

In cataract surgery, removal of a clouded crystalline lens by ultrasonic emulsification and implantation into the eye after removal of the crystalline lens are widely performed. Currently, soft intraocular lenses made of a soft material such as silicone elastomer are inserted into the eye using an intraocular lens insertion instrument.

When inserting a soft intraocular lens into the eye, the intraocular lens can be folded, making it possible to reduce the size of the incision on the cornea.

A known method for folding an intraocular lens is to fold it within an intraocular lens insertion device.

Patent Document 1 discloses that when using an intraocular lens insertion device, in order to make vibrations less likely to occur during operation than in the past, there is provided an inserter main body provided with a lens installation part in which an intraocular lens is installed, and a lens insertion device body. a rotary member, which is connected to the rear end of the inserter main body and is rotatable around the axis of the inserter main body without moving in the axial direction of the inserter main body; and a second threaded part that engages with the first threaded part from an initial state before use, and when the rotating member is rotated, the first threaded part and the second threaded part are engaged with each other. a movable body that moves in the axial direction of the inserter body independently of the rotating member due to engagement with the rotating member, thereby ejecting the intraocular lens from the distal end of the hollow body. An endolens insertion device is disclosed (Claim 1 of Patent Document 1, [0008]). The intraocular lens insertion device in which the movable body is advanced by rotation of the rotary member in this manner is hereinafter also referred to as a screw type insertion device.

Patent No. 6276619 specification

In the screw-type insertion instrument described in Patent Document 1, the operator moves the tabs (the pair of left and right wings 6b described in Patent Document 1) to move the slider forward. In other words, the operator needs two actions: advancing the slider using the tab and advancing the movable body (plunger and/or rod) by rotating the rotating member. If the two actions can be combined into one, the burden on the caster will be reduced.

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

The first aspect of the present invention is
An intraocular lens insertion device that advances an intraocular lens having an optical part having an optical function while folding it and ejects it from a nozzle,
A rotating member that can rotate in the axial direction in the front and back directions;
a slider that can move forward;
a moving body that pushes out the intraocular lens and releases it from a nozzle;
Equipped with
The rotating member rotates to advance the movable body and the slider and first stop the advance of the slider,
An intraocular lens, wherein rotation of the rotating member and advancement of the moving body are linked, rotation of the rotating member and advancement of the slider are linked, while the moving body and the slider move forward independently. It is an insertion device.

A second aspect of the present invention is the aspect described in the first aspect, comprising:
The rotating member rotates without moving forward or backward.

A third aspect of the present invention is the aspect described in the first or second aspect,
An inserter main body is provided with a lens installation part in which the intraocular lens is installed, and a first threaded part is formed, and the inserter main body is arranged around the axis of the inserter main body without moving in the axial direction of the inserter main body. further comprising a hollow body having the rotating member rotatable to
The movable body has a second threaded portion that meshes with the first threaded portion, and when the rotating member is rotated, the first threaded portion and the second threaded portion engage with each other. move forward by
The slider has a third threaded portion that meshes with the first threaded portion, and moves forward due to the engagement between the first threaded portion and the third threaded portion when the rotating member is rotated. .

A fourth aspect of the present invention is the aspect described in the third aspect, comprising:
The first threaded portion is formed along the axial direction inside the rotating member,
The forward movement of the slider is first stopped by rotating the rotating member and causing the third threaded portion to fall off to a portion where the first threaded portion is not formed to release the engagement between the two.

A fifth aspect of the present invention is the aspect described in the fourth aspect, comprising:
A portion of the inner side of the rotating member where the first threaded portion is not formed is a front end of the inner side of the rotating member,
The third threaded portion of the slider is located further forward than the second threaded portion of the movable body.

A sixth aspect of the present invention is the aspect according to any one of the third to fifth aspects,
The movable body has a second threaded portion that engages with the first threaded portion from an initial state before use,
The slider has a third threaded portion that engages with the first threaded portion from an initial state before use.

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

Other aspects of the present invention that can be combined with the above aspects are as follows.

Preferably, the rotating member is connected to a rear end of the inserter body.

the slider moves forward to deform the intraocular lens into a predetermined shape;
Preferably, the movable body pushes out the intraocular lens deformed by the slider and discharges it from a nozzle.

Preferably, the slider is capable of arranging a portion of the slider above the intraocular lens when the intraocular lens is folded.

In order to make the third threaded part fall off in the part N where the first threaded part is not formed, the length (front and rear width) of the third threaded part is set to the part N where the first threaded part is not formed. It is preferably smaller than the length (front-to-back width). As for the actual dimensions in this case, the length (front-to-back width) of the third threaded portion is, for example, 0.5 to 5.0 mm, and the length (front-to-back width) of the portion N is 1.0 to 6.0 mm.

A second threaded part provided on the movable body is engaged with a predetermined location α of the first threaded part inside the rotating member, and the second threaded part moves forward along the rotating first threaded part, It is preferable that the moving object moves forward accordingly. Then, the third threaded part provided on the slider meshes with another predetermined part β (a part different from α in the front-rear direction) of the first threaded part inside the rotating member, and the second threaded part Preferably, the slider moves forward along the rotating first threaded portion, and the slider moves forward accordingly.

The movable body is housed inside the hollow body without protruding from the rear end of the rotating member in an 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 prevention mechanism that prevents reverse rotation of the rotary member in the initial state before use.

According to the present invention, it is possible to provide a technique that reduces the burden on the operator when handling a screw-type insertion instrument.

FIG. 1 is a perspective view showing an example of the external appearance of an intraocular lens insertion device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of an intraocular lens insertion instrument according to an embodiment of the present invention. FIG. 3 is a top view of the slider, FIG. 3(a) is the slider described in Patent Document 1, and FIG. 3(b) is the 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, and FIG. 4(a) is the state described in Patent Document 1, and FIG. This is the situation. FIG. 5 is a schematic transparent side view of the intraocular lens insertion device according to the present embodiment in an initial state before use. FIG. 6 is a schematic transparent side view of the intraocular lens insertion device according to the present embodiment, and FIG. 6(a) is the same view as FIG. 5 and is a diagram of the initial state before use, and FIG. ) is a diagram when the third threaded part of the slider has fallen off to part N, and Figure 6(c) shows that the third threaded part of the slider has fallen off to part N and the slider continues to move even after it has stopped moving forward. It is a diagram showing how the body moves forward. FIG. 7 is a perspective view showing an example of the external appearance of the intraocular lens insertion device described in Patent Document 1. FIG. 8 is a schematic transparent side view of a modified example of the intraocular lens insertion device according to the present embodiment.

Embodiments of the present invention will be described in detail below with reference to the drawings. In this specification, "~" refers to a value greater than or equal to a predetermined value and less than or equal to a predetermined value.

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

Although this embodiment exemplifies a preloaded screw-type insertion instrument in which an intraocular lens is pre-loaded, the present invention is not limited thereto. Further, although a disposable screw-type insertion device integrally formed by injection molding is illustrated, the present invention is not limited thereto.

<Basic configuration of the intraocular lens insertion device according to the present embodiment>
In this embodiment, an example of an intraocular lens is a one-piece type intraocular lens made of a soft material such as silicone elastomer or soft acrylic, and includes a circular effective optical part that performs an optical function and its peripheral part. The present invention deals with an intraocular lens having an optical part and two support parts that curve and extend outward from two places on the outer periphery of the optical part.

A case is illustrated in which the optical part of the intraocular lens and the proximal end side of the support part connected to the optical part are made of a soft material. This configuration facilitates folding of the intraocular lens. Note that the end side of the support portion may be similarly made of a soft material, or may be made of a hard material (eg, polyethylene, PMMA, etc.).

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

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

As shown in FIGS. 1 and 2, the basic structure of the intraocular lens insertion instrument 1 includes an inserter main body 5, a slider 6, an insertion tube 7, a screw body 8 as a rotating member, and a plunger 9. , rod 10. The slider 6 is attached to the inserter body 5. The inserter main body 5, the insertion tube 7, and the screw body 8 constitute a hollow body by being connected to each other. Further, the plunger 9 and the rod 10 constitute a moving body by being connected to each other. In constructing the hollow body, the insertion tube 7 is connected to the distal end of the inserter main body 5, and the screw body 8 is connected to the rear end of the inserter main body 5. Further, in configuring the moving body, the rod 10 is connected to the tip of the plunger 9. A moving body consisting of a plunger 9 and a rod 10 is housed inside a hollow body consisting of an inserter main body 5, an insertion tube 7, and a screw body 8.

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

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

When folding into the valley fold shape, a portion of the slider 6 is placed above the intraocular lens. With this arrangement, when the intraocular lens (particularly the optical part) is deformed by the advancement of the slider 6, it is possible to avoid mountain folding (upward bending) of the intraocular lens. The slider 6 will be explained in detail later.

The insertion tube 7 is for folding the intraocular lens installed in the lens installation part into a small size and guiding it into the eye when the intraocular lens 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 this time, the lens installation part 11 of the inserter main body 5 is accommodated and arranged within the insertion cylinder main body 7a of the insertion cylinder 7.

The nozzle 7b is formed at the tip of the insertion tube 7. The tip of the nozzle 7b is opened with an oblique cut. The tip of the nozzle 7b becomes the part that is inserted into the incision of the eyeball when inserting the intraocular lens into the eye using the inserter main body 5.

The screw body 8 is coaxially connected to the rear end 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 into a cylindrical shape. The tip and rear ends of the screw body 8 are each opened circularly. A plurality of protrusions 8a are formed on the outer peripheral surface of the screw body 8. Each protrusion 8a is formed parallel to the longitudinal direction of the screw body 8. A total of eight protrusions 8a are formed at equal angular pitches in the circumferential direction of the screw body 8. The screw body 8 becomes a part that is rotated by the user. At this time, if a plurality of protrusions 8a are formed on the outer peripheral surface of the screw body 8, the user's fingers will be caught on the protrusions 8a, making it easier to rotate the screw body 8.

A first threaded portion 8b is formed on the inner circumferential surface of the screw body 8, as also shown in FIGS. 5 and 6. The first threaded portion 8b constitutes a female thread. The first threaded portion 8b is formed over almost the entire axial direction of the screw body 8. However, in this embodiment, a portion N where the first threaded portion 8b is not provided is intentionally provided out of almost the entire area in the axial direction.

The plunger 9 moves (advances) within 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 into a substantially prismatic shape. In an initial state before use, the plunger 9 is inserted into the screw body 8 so as not to protrude from the rear end of the screw body 8.

A connecting hole is formed in the tip surface of the plunger 9. The connection hole is for connecting the rod 10 to the tip 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 circumferential surface of the inserter main body 5 in correspondence with the convex portion. 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 threaded portion 9c is formed at the rear end of the plunger 9. The second threaded portion 9c constitutes a male thread, and is always maintained in a state of meshing with the first threaded portion 8b of the screw body 8. The second threaded portions 9c may be formed in pairs above and below the plunger 9. However, as shown in FIG. 5, even if only one second threaded portion 9c is formed instead of a pair, if the screw body 8 rotates, a female thread (concave) is formed inside the screw body 8. The second threaded portion 9c comes into contact with the projection 8b', and the second threaded portion 9c is pushed forward. In this embodiment, this example will be given.

When using the intraocular lens insertion device 1, the screw body 8 is operated 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 of the plunger 9 against an abutment portion arranged at the rear end of the inner circumference of the screw body 8.

The rod 10 allows the intraocular lens installed in the lens installation part to be ejected from the opening of the nozzle 7b of the insertion tube 7. In this embodiment, the moving body (rod 10 and eventually plunger 9) pushes out the intraocular lens that has been deformed into a predetermined shape (valley fold shape) by the slider 6 and discharges it from the nozzle 7b. The rod 10 is formed into an elongated rod shape. In this embodiment, an example is given in which the plunger 9 and the rod 10 are separate bodies, but they may be integrally molded.

The intraocular lens insertion instrument 1 is operated by rotating the screw body 8 in one direction (hereinafter also referred to as "normal rotation"). At this time, the first threaded portion 8b of the screw body 8 and the second threaded portion 9c of the plunger 9 are always engaged, including the initial state before use. Therefore, when the screw body 8 is rotated in the forward direction, the plunger 9 simultaneously begins to move toward the inserter main body 5 (forward).

If the user mistakenly attempts to rotate the screw body 8 in the opposite direction under the initial state before use, the rear end of the plunger 9 will abut against the abutting portion of the screw body 8. Therefore, reverse rotation (erroneous operation) of the screw body 8 is prevented. In other words, the abutting portion of the screw body 8 and the rear end portion of the plunger 9 that abuts against the abutting portion constitute a reverse rotation prevention mechanism that prevents the screw body 8 from rotating in the reverse direction in the initial state before use.

Incidentally, forward rotation of the screw body 8 refers to the forward rotation of the screw body 8 when the plunger 9 (in addition to the plunger 9 in this embodiment, the slider 6) moves forward due to the engagement of the threaded parts when the screw body 8 is rotated. The rotation of

For contents not described above, the configuration of the screw-type insertion instrument described in Patent Document 1 is adopted, and the description of Patent Document 1 is assumed to be completely described in this specification. For example, one specific example of the "rotating member" is the screw body 8 of Patent Document 1. One specific example of a "moving object" is the plunger 9 and rod 10 of Patent Document 1. One specific example of the "hollow body" is the inserter main body 5, the insertion tube 7, and the screw body 8.

<Characteristics of the intraocular lens insertion device according to the present embodiment>
FIG. 3 is a top view of the slider, FIG. 3(a) is the slider described in Patent Document 1, and FIG. 3(b) is the 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, and FIG. 4(a) is the state described in Patent Document 1, and FIG. This is the situation.
Hereinafter, the parts of the configuration described in Patent Document 1 (e.g., Fig. 4(a)) corresponding to this embodiment (e.g., Fig. 4(b)) will be referred to as the same code multiplied by 100 ( Example: code 6c → code 600c).
FIG. 5 is a schematic transparent side view of the intraocular lens insertion device according to the present embodiment in an initial state before use.
FIG. 6 is a schematic transparent side view of the intraocular lens insertion device according to the present embodiment, and FIG. 6(a) is the same view as FIG. 5 and is a diagram of the initial state before use, and FIG. ) is a diagram when the third threaded part of the slider has fallen off to part N, and Figure 6(c) shows that the third threaded part of the slider has fallen off to part N and the slider continues to move even after it has stopped moving forward. It is a diagram showing how the body moves forward.

The configuration of the characteristic parts of the intraocular lens insertion instrument according to this embodiment is as follows.
"An intraocular lens insertion device that folds and advances an intraocular lens equipped with an optical part having an optical function and ejects it from a nozzle,
A rotating member that can rotate in the axial direction in the front and back directions;
a slider that can move forward;
a moving body that pushes out the intraocular lens and releases it from a nozzle;
Equipped with
The rotating member rotates to advance the movable body and the slider and first stop the advance of the slider,
An intraocular lens, wherein rotation of the rotating member and advancement of the moving body are linked, rotation of the rotating member and advancement of the slider are linked, while the moving body and the slider move forward independently. Insertion instrument. ”

If the above configuration is adopted, by rotating the rotating member, not only the movable body (plunger 9 and/or rod 10; description thereof will be omitted hereinafter) but also the slider 6 are moved forward. Therefore, the operator can appropriately eject the intraocular lens from the nozzle 7b with 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 6(a), a second thread provided on the movable body is connected to a predetermined location α of the first threaded portion 8b inside the rotating member. The threaded portions 9c engage, the second threaded portion 9c moves forward along the rotating first threaded portion 8b, and the movable body moves forward accordingly (FIG. 6(a)→FIG. 6(b)).

As shown in FIGS. 5 and 6(a), the slider is provided at another predetermined location β (different part from α in the front-rear direction) of the first threaded portion 8b inside the rotating member. The third threaded portion 6i is engaged with the third threaded portion 6i, and the third threaded portion 6i moves forward along the rotating first threaded portion 8b, and the slider 6 moves forward accordingly (FIG. 6(a)→FIG. 6(b)). ). When the rotating member continues to rotate, the third threaded portion 6i falls off to a portion N where the first threaded portion 8b is not formed, as shown in FIG. 6(b). As a result, the advance of the slider 6 is 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 "independently moving forward" means that the moving body does not move forward or is only slightly involved in moving the slider 6 forward. In other words, since the slider 6 is connected to the movable body and moves the movable body forward, a state in which the slider moves forward is excluded. However, this does not prevent the slider 6 from coming into contact with the moving body (that is why the expression "less involved" is used). "Independently moving forward" is, for example, a state in which the majority (preferably 80% or more, more preferably 100%) of the force for moving the slider 6 forward is provided from the rotating member.

<Specific example of slider>
The slider 6 has a tip portion 6a and a pair of left and right leg portions 6c. The tip 6a is arranged at the tip of the slider 6. The distal end 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 movement of the slider 6.

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

In Patent Document 1, a pair of left and right wings (600b in FIG. 7) are formed on the slider, but in this embodiment, these are not formed as shown in FIG. This is because the slider 6 can be moved forward by the rotation of the screw body 8 even without the pair of left and right wings (tabs).

The pair of legs 6c are arranged inside the inserter body 5 along the inner surface of the outer wall of the inserter body 5. As shown in FIG. 3A, in Patent Document 1, a stopper portion 600g is formed on each leg portion 600c, but in this embodiment, a stopper portion 600g is not formed. Even if there is no stopper part 600g that constitutes the reverse movement prevention mechanism of the slider 600, the slider 6 can move forward by dropping the third threaded part 6i of the slider 6 to the part N where the first threaded part is not formed. This is because the backward movement (reverse movement) is also stopped.

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

In this specification, "engaged" refers to a state in which an object that comes into contact with the first threaded part 8b moves forward as the screw body 8 rotates, and as shown in FIGS. 5 and 6, the second part of the plunger This includes a state in which the threaded portion 9c is fitted into a recess of a female screw, and a state in which the third threaded portion 6i of the slider 6 is in contact with a recess in a female screw. "Meshing" may be rephrased as "engaging."

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

An inserter main body is provided with a lens installation part in which an intraocular lens is installed, and a first screw part is formed, the inserter main body is connected to the rear end part of the inserter main body, and the inserter main body is connected to the rear end part of the inserter main body, and extends in the axial direction of the inserter main body. a hollow body having the rotary member (screw body 8 in this embodiment) that is rotatable around the axis of the inserter main body without moving;
It has a second threaded portion 9c that engages with the first threaded portion from an initial state before use, and when the rotating member is rotated, the first threaded portion and the second threaded portion 9c are engaged with each other. The movable body (plunger 9 in this embodiment) that moves (advances) in the axial direction of the inserter main body through engagement to eject the intraocular lens from the nozzle at the tip of the hollow body;
It has a third threaded portion 6i that engages with the first threaded portion from an initial state before use, and when the rotating member is rotated, the first threaded portion and the third threaded portion 6i are engaged with each other. the slider 6 which deforms the intraocular lens into a predetermined shape by moving (advancing) in the axial direction of the inserter main body through engagement;
It is preferable to have the following.
The difference from the description in Patent Document 1 in this paragraph is that the slider 6 is provided with a third threaded portion 6i that engages with the first threaded portion.

Preferably, the first threaded portion is formed along the axial direction inside the rotating member. Then, by continuing to rotate the rotary member and causing the third threaded portion 6i to fall off to a portion where the first threaded portion is not formed to release the engagement between the two, the slider 6 is advanced first. It is preferable to stop. "Continuing rotation" as used herein means rotating multiple times, and includes restarting rotation after stopping midway.

The above preferred example will be described in detail below.

As shown in FIG. 5, a second threaded part 9c provided on the movable body is engaged with a predetermined position α of the first threaded part 8b inside the rotating member, and the second threaded part 9c is engaged with the rotating first threaded part 9c. The movable body advances along the threaded portion 8b of No. 1, and the movable body advances accordingly. This configuration and the mechanism by which the second threaded portion 9c (and the third threaded portion 6i described in the lower paragraph) move forward are as described in Patent Document 1.

Then, the third threaded portion 6i provided on the slider 6 is engaged with another predetermined location β of the first threaded portion 8b inside the rotating member, and the second threaded portion 9c is engaged with the rotating first threaded portion β. The slider 6 moves forward along the portion 8b, and the slider 6 moves forward accordingly.

As shown in the change from FIG. 6(a) to FIG. 6(b), the movable body (plunger 9) and the slider 6 move forward together, but the slider 6 moves forward due to the force from the rotating member and moves. You are not moving forward due to the forward force of your body.

It is preferable that the portion N on the inner side of the rotary member where the first threaded portion 8b is not formed is the inner front end of the rotary member. In addition, it is preferable that the third threaded portion 6i of the slider 6 be located further forward than the second threaded portion 9c of the movable body. As a result, the slider 6 and the movable body can be advanced with one action without requiring a complicated configuration, and furthermore, the advance of the slider 6 can be stopped first.

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

Note that, as shown in FIG. 8, when the third threaded portion 6i of the slider 6 is located rearward than the second threaded portion 9c of the movable body, the first threaded portion 6i on the inside of the rotating member The portion N where the threaded portion 8b is not formed is located on the inner rear side of the rotary member, near the front of the third threaded portion 6i, and between the second threaded portion 9c and the third threaded portion in the front-rear direction (X1-X2 direction). 3 and the threaded portion 6i of No. 3. With this configuration, shortly after the rotating member starts rotating, the third threaded portion 6i falls off into the portion N where the first threaded portion 8b is not formed, while the second threaded portion 9c continues to move forward. This allows the moving object to continue moving forward.

In order to allow the third threaded part 6i to fall off in the part N where the first threaded part 8b is not formed, the length (front and back width) of the third threaded part 6i is set so that the length (front and rear width) of the third threaded part 6i is set so that the first threaded part 8b is not formed. It is preferable that the length (front-to-back width) of the portion N that does not exist is smaller than the length (front-to-back width). As for the actual dimensions in this case, the length (front-to-back width) of the third threaded portion 6i is, for example, 0.5 to 5.0 mm, and the length (front-to-back width) of the portion N is 1.0 to 6.0 mm. .

By employing the above configuration, in addition to the effects of the present invention, the following effects can be achieved. The intraocular lens insertion device according to this embodiment is intended to be operated by a surgeon. On the other hand, even when automating the insertion of an intraocular lens, the intraocular lens insertion device according to this embodiment can be used. For example, an intraocular lens can be automatically inserted by activating an actuator that engages with a plurality of protrusions 8a formed on the surface of a rotating member (screw body 8) described in Patent Document 1. In that case, a spiral groove is formed on the outer side (the outermost surface) of the rotating member instead of the plurality of protrusions, and an actuator that has a protrusion that engages with the spiral groove and is movable forward is activated. An intraocular lens may be inserted.

In addition, the preferred example and/or modified example described in Patent Document 1 can be applied to this embodiment. Some of them are listed below.

The movable body is housed inside the hollow body without protruding from the rear end of the rotating member in an 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 prevention mechanism that prevents reverse rotation of the rotary member in the initial state before use.

The technical scope of the present invention is not limited to the above-described embodiments, but also includes various modifications and improvements within the scope of deriving specific effects obtained by the constituent elements of the invention and their combinations.

For example, the present invention is not limited to rotating the rotating member without moving forward and backward. For example, a configuration may be adopted in which the rotating member moves forward slightly only when it begins to rotate. If such a configuration is adopted, after the rotating member moves forward a certain amount, the rotating member continues to rotate without moving forward or backward, and the slider 6 and plunger 9 move forward, and the slider 6 moves forward first. It may be stopped.

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

In the above embodiment, an example was given in which the first threaded portion and the second threaded portion 9c engage with each other from the initial state before use. On the other hand, the intraocular lens insertion device may have a structure in which the two do not mesh in the initial state before use, but only mesh with each other during use.

In the above embodiment, an example was given in which the first threaded portion and the third threaded portion 6i engage with each other from the initial state before use. On the other hand, the intraocular lens insertion device may have a structure in which the two do not mesh in the initial state before use, but only mesh with each other during use.

In the above embodiment, an example was given in which the intraocular lens is deformed into a predetermined shape by moving the slider 6. On the other hand, the present invention is also applicable to the slider 6 that does not deform the intraocular lens. For example, the slider 6 itself does not move the intraocular lens forward, but the intraocular lens is moved forward by a movable body (such as the rod 10) to a place where the inner diameter of the inserter body 5 and/or the insertion tube 7 narrows. When folding the lens, only a portion of the slider 6 may be placed above the intraocular lens. Specifically, as the intraocular lens advances, the slider 6 also advances, but the slider 6 does not actively participate in the advancement of the intraocular lens, and continues to move forward until the intraocular lens assumes a valley-fold shape. It is also possible to simply continue disposing a portion of the slider 6 above the lens.

With this arrangement, when the intraocular lens is pushed out and bent by the rod 10 etc. inside the insertion tube main body 7a whose inner diameter is narrowed, a part of the slider 6 is located above the intraocular lens, so that the intraocular lens is Mountain folding (folding upward) can be avoided.

Further, although it is preferable that the slider 6 performs the function of assisting folding of the intraocular lens as in the above embodiment and the modification, the present invention is not limited thereto, and the slider 6 performs a function other than folding the intraocular lens. A slider 6 may also be used.

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

Claims (6)

An intraocular lens insertion device that advances an intraocular lens having an optical part having an optical function while folding it and ejects it from a nozzle,
A rotating member that can rotate in the axial direction in the front and back directions;
a slider that can move forward;
a moving body that pushes out the intraocular lens and releases it from a nozzle;
Equipped with
The rotating member rotates to advance the movable body and the slider and first stop the advance of the slider,
The rotation of the rotating member and the advancement of the moving body are linked, and the rotation of the rotating member and the advancing of the slider are linked, while the moving body and the slider each move forward independently,
An inserter main body is provided with a lens installation part in which the intraocular lens is installed, and a first threaded part is formed, and the inserter main body is arranged around the axis of the inserter main body without moving in the axial direction of the inserter main body. further comprising a hollow body having the rotating member rotatable to
The movable body has a second threaded portion that meshes with the first threaded portion, and when the rotating member is rotated, the first threaded portion and the second threaded portion engage with each other. move forward by
The slider has a third threaded part that engages with the first threaded part, and when the rotating member is rotated, the slider has a third threaded part that engages with the first threaded part, and when the rotating member is rotated, the first threaded part and the third threaded part engage with each other. An intraocular lens insertion device that moves forward . The intraocular lens insertion instrument according to claim 1, wherein the rotating member rotates without moving forward or backward. The first threaded portion is formed along the axial direction inside the rotating member,
The forward movement of the slider is first stopped by rotating the rotating member and causing the third threaded portion to fall off to a portion where the first threaded portion is not formed to release the engagement between the two. The intraocular lens insertion device according to item 1 or 2 . A portion of the inner side of the rotating member where the first threaded portion is not formed is a front end of the inner side of the rotating member,
The intraocular lens insertion instrument according to claim 3 , wherein the third threaded portion of the slider is located further forward than the second threaded portion of the movable body. The movable body has the second threaded portion that engages with the first threaded portion from an initial state before use,
The intraocular lens insertion device according to any one of claims 1 to 4 , wherein the slider has the third threaded portion that engages with the first threaded portion from an initial state before use. The intraocular lens insertion device according to any one of claims 1 to 5 , wherein the slider assists folding of the intraocular lens.