CN217723886U

CN217723886U - Intraocular implant implantation device

Info

Publication number: CN217723886U
Application number: CN202221196993.0U
Authority: CN
Inventors: 陈亮
Original assignee: Eyebright Suzhou Medical Apparatus And Instruments Co ltd
Current assignee: Eyebright Suzhou Medical Apparatus And Instruments Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-11-04
Anticipated expiration: 2032-05-17

Abstract

The utility model provides an intraocular implant implantation device capable of operating more flexibly. The method comprises the following steps: a housing (11); a push rod (21) having a first screw portion (44) and a front portion inserted into the housing (11); a switching operation member (41) mounted on the housing (11); a second screwing section (43) which can move to a screwing position screwed with the first screwing section (44) in linkage with the conversion operating element (41); and a return spring (42) for returning the second engaging portion (43) to a retracted position where the engagement with the first engaging portion (44) is released.

Description

Intraocular implant implantation device

Technical Field

The utility model relates to an intraocular implant implantation device.

Background

An intraocular implant implantation device (in the following description, sometimes simply referred to as an implantation device) is a surgical instrument for implanting an intraocular implant into a human eye. Intraocular implants herein include, for example, intraocular lenses and capsular bag tension rings, among others.

Currently, intraocular implant implantation devices include both push-in and screw-in implant devices, depending on the manner of use by the operator. A push-in type implant device refers to a device in which an operator can perform an implantation of an intraocular implant into a human eye by a pushing operation. With the push-in implantation device, the operator can operate with one hand, and the flexibility of operation is relatively high. The screw-in type implant device refers to a device which an operator can implant an intraocular implant into a human eye by a rotating operation. With the screw-in type implantation device, an operator generally needs to hold the implantation device body with one hand and perform rotation operation with the other hand, and the screw-in type implantation device has the characteristic of relatively high operation stability.

With the development of technology, a push-and-turn integrated type intraocular implant implanting device has been proposed, and such a device is disclosed in patent document 1, for example. By adopting the push-and-turn integrated intraocular implant implanting device, an operator can select to adopt push-in operation or screw-in operation, and the operation habit of the operator can be better met.

Patent document 1: CN112826636A

SUMMERY OF THE UTILITY MODEL

There is still room for improvement in push-and-turn integrated intraocular implant implantation devices in terms of operational flexibility.

In view of this, the present invention provides an intraocular implant implanting device that can be operated more flexibly.

The utility model provides an intraocular implant implants device, it includes: a housing; the front part of the push rod is inserted into the shell and is provided with a first screwing part; a switching operation member mounted on the housing; a second rotary-joint part which can be linked with the conversion operating part and move to a rotary-joint position where the second rotary-joint part is rotatably jointed with the first rotary-joint part; and a return spring for returning the second screwing portion to an avoiding position where the screwing with the first screwing portion is released.

By adopting the structure, an operator operates the conversion operating part to enable the second screwing part to be linked therewith and move to the screwing position screwed with the first screwing part, thereby converting the intraocular implant implanting device or the push rod into a screwing operation mode. And, the operator separates the finger from the switching operation member, and then, the first rotating-engagement portion is automatically returned to the escape position where the rotation with the first rotating-engagement portion is released by the return spring, so that the intraocular implant implanting device or the push rod is automatically switched to the push-in operation mode without a special operation by the operator. Therefore, the operation flexibility is improved, the operator can more freely realize the mode conversion of the implantation device, and the operator can feel the operation convenience.

Optionally, the device further comprises an action piece mounted on the housing, and the second screwing part is arranged on the action piece; the conversion operating part is rotationally connected with the operating part.

The return spring is arranged between the outer surface of the shell and the conversion operating piece.

Because the conversion operating part can rotate, the restriction is less compared with the operation part provided with the second screwing part, when an operator touches the conversion operating part, the spring force can be well sensed, and the operator can feel softer and better operation hand feeling.

Alternatively, the return spring includes a pair of springs disposed across a rotation center of the switching operation member.

With the above configuration, the two springs are disposed with the rotation center of the switching operation tool interposed therebetween, and compared with a structure in which the return spring is fitted over the operation tool, for example, it is possible to prevent the end portion of the switching operation tool from easily rotating and touching the housing, thereby enabling the switching operation tool to rotate in a satisfactory manner and providing a better operation feeling for the operator.

Optionally, the return spring is disposed between an outer surface of the housing and the conversion operation member.

Optionally, the conversion operating part is in a rectangular plate shape; the return spring includes a pair of springs arranged along a length direction of the switching operation member.

With the structure, the end part of the conversion operating piece can be prevented from easily touching the shell, so that better operation feeling can be provided for an operator.

Alternatively, a recess may be provided in at least one of the housing and the switching operation member, and an end of the return spring may be accommodated in the recess.

By adopting the structure, the reset spring can be prevented from moving or falling off, so that the structure is stable and reliable.

Optionally, a mounting hole is formed in the housing; the action piece is slidably mounted in the mounting hole.

Therefore, the technical effects of simple and reliable structure and stable action can be obtained.

Optionally, the method further includes: the connecting piece is rotatably connected relative to the push rod; the injection piece is relatively fixed on the connecting piece through a fixing piece; the inner surface of the housing is provided with a guide groove extending in the front-rear direction, and the fixing member is fitted in the guide groove.

By adopting the structure, the fixing piece has the functions of guiding and stopping rotation, so that the structure is simple without additionally arranging a guiding and stopping rotation structure.

Optionally, the fixing member includes a shaft portion and a large head portion, the shaft portion connects the connecting member and the injection member together, and the large head portion is embedded in the guide groove.

Optionally, the push rod further comprises an end cap detachably mounted to the housing, and the front portion of the push rod is inserted into the housing through the end cap.

By adopting the structure, the end cap can be detached, and all the parts in the shell can be taken out for cleaning, thereby realizing the repeated use.

Optionally, the housing or the push rod is a metal part.

With the above structure, the utility model can be used repeatedly.

Alternatively, the intraocular implant implantation device may be an intraocular lens injector.

In the present application, "front and back" means, unless otherwise specified, a front and back direction in the bolus direction, that is, a front and back direction in the moving direction of the bolus drive mechanism.

The term "screw portion" as used herein refers to a structure capable of converting a rotational motion into a linear motion by fitting with each other, and typically includes a screw thread, a spiral groove, and the like.

Drawings

The various features and the connections between the various features of the present invention are further described below with reference to the attached drawings. The figures are exemplary, some features are not shown to scale and some of the figures may omit features customary in the art to which this application relates and which are not essential to the application or show additional features which are not essential to the application, the combination of features shown in the figures is not intended to limit the application. In addition, the same reference numerals are used throughout the specification to designate the same components. The specific drawings are illustrated as follows:

fig. 1 is a schematic view of an intraocular implant implantation device according to an embodiment of the present invention, showing internal structures of the intraocular implant implantation device;

fig. 2 is a schematic cross-sectional view of the intraocular implant implantation device described above;

fig. 3a is another schematic cross-sectional view of the intraocular implant implantation device described above;

FIG. 3b is an enlarged view of a portion of FIG. 3 a;

fig. 4 is a side view of the intraocular implant implantation device described above;

fig. 5 is another side view of the intraocular implant implantation device described above;

fig. 6 is a perspective view of the intraocular implant implanting device described above;

fig. 7a is a schematic view of a partial structure of the intraocular implant implanting device described above;

fig. 7b is a schematic view of another partial structure of the intraocular implant implanting device described above;

fig. 8 is a schematic view for explaining a fitting structure of a housing and a plunger of the intraocular implant implanting device described above;

fig. 9 is a schematic view of an intraocular implant implantation device according to another embodiment of the present invention.

Description of the reference numerals

100. An intraocular implant implantation device; 1. a housing unit; 2. a bolus drive mechanism; 3. a bolus spring; 4. a switching mechanism; 11. a housing; 11b, an accommodating part; 11c, a recess; 11d, mounting holes; 11e, a guide groove; 12. a handle; 13. an end cap; 14. a hand-held portion; 21. a push rod; 21a, a locking part; 22. screwing the rod part; 22a, a rotary connection part; 23. a connecting member; 23a, a rotary connecting part; 24. injecting the part; 25. a push handle; 26. a fixing member; 26a, a shaft-like portion; 26b, a large head part; 41. an operating member; 41a, a recess; 42. a return spring; 43. a screwing section (second screwing section); 44. a screwing section (first screwing section); 45. an actuation member; 46. and (4) a pin.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In the case of inconsistency, the meaning described in the present specification or the meaning derived from the content described in the present specification shall control. In addition, the terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.

Fig. 1 is a schematic view of an intraocular implant implantation device according to an embodiment of the present invention, in which the internal structure of the intraocular implant implantation device is shown; fig. 2 is a schematic cross-sectional view of the intraocular implant implanting device described above, with the push rod in the initial position in fig. 2; fig. 3a is another schematic cross-sectional view of the intraocular implant implanting device described above, in which fig. 3a the push rod is in a position moved a distance forward from the initial position; fig. 3b is a partial enlarged view of fig. 3 a. Fig. 4 is a schematic side view of the intraocular implant implantation device described above; fig. 5 is another side view of the intraocular implant implantation device described above; fig. 6 is a perspective view of the intraocular implant implanting device described above; fig. 7a is a schematic view of a partial structure of the intraocular implant implanting device described above; fig. 7b is a schematic view of another partial structure of the intraocular implant implanting device described above.

<1. Summary >

In this embodiment, the intraocular implant implanting device 100 is used to implant an intraocular lens, which may also be referred to as an intraocular lens injector, into a human eye. It will be appreciated that the invention is not so limited and may also be applied to other intraocular implant implantation devices, such as capsular tension ring implantation devices.

As shown in fig. 1 to 4, etc., a push-and-turn integrated intraocular implant implantation device (simply referred to as an implantation device) 100 is mainly composed of a housing unit 1, a push injection driving mechanism 2 (including a push rod 21, a connecting member 23, a push injection member 24, etc.), a push injection member spring 3, and a conversion mechanism 4. By operating the switching mechanism 4, the implant device 100 can be switched between a push-in operation mode and a screw-in operation mode. When the implant device 100 is in the push-in mode of operation, the operator may push the intraocular lens into the human eye by pushing the push rod 21. When the implant device 100 is in the screw-in mode of operation, the operator may push the intraocular lens into the human eye by rotating the push rod 21.

Here, the push-in operation mode and the screw-in operation mode are substantially different modes of the operation of the push rod 21 by the operator, and therefore the push rod 21 may be said to have the push-in operation mode and the screw-in operation mode.

The implant device 100 may be designed to constitute a push-turn integrated intraocular lens implant system by assembling an introducer (not shown), or may be designed to constitute a push-turn integrated pre-assembled intraocular lens by assembling an introducer and incorporating an intraocular lens therein. The implantation device 100 has a function of selecting a push-in operation mode and a screw-in operation mode before the start of the injection operation, and in the push-in operation mode, the injection driving mechanism 2 can realize the retraction operation at any time under the action of the injection spring 3.

In the present embodiment, the main structure of the implant device 100 is made of metal, and is reusable. For example, the housing 11 and the end cap 13 in the housing unit 1 are made of metal, and the push rod 21, the connector 23, and the push injector 24 in the push drive mechanism 2 are made of metal. In addition, other members may be made of metal. In the present embodiment, all the components of the implant device 100 are made of metal.

As other embodiments, the implant device 100 may be made of plastic.

The following describes the main components of the implantation apparatus 100. In the following description, each component is described in an attached state unless otherwise specified.

<2, introduction of structural elements >

<2.1, housing Unit >

As shown in fig. 1 to 8, the housing unit 1 includes a housing 11, a handle 12, a hand-held portion 14, and an end cap 13.

The housing 11 is cylindrical, and has a front end to which an introduction head (not shown) can be connected and a rear end to which the bolus drive mechanism 2 can be connected. The screw lever portion 22 of the push rod 21 of the bolus drive mechanism 2, the connector 23, and the bolus 24 are accommodated in the housing 11. The housing 11 may be a single piece or may be an assembly of multiple pieces assembled together. In the present embodiment, the housing 11 has a cylindrical shape, but may have a square cylindrical shape as another embodiment.

A housing 11b is provided at the front end of the case 11, and the housing 11b is used for placing an intraocular lens.

A grip portion 14 (fig. 5, 6, etc.) and a handle 12 protruding to the outer peripheral side are provided on the outer periphery of the housing 11. In the present embodiment, the hand-held portion 14 and the handle 12 are formed integrally, are formed separately from the housing 11, and are assembled to the housing 11 by an engaging structure so as to be detachable from the housing 11. In the pushing-in operation, the operator's (usually) forefinger and middle finger respectively engage on the front surface of the handle 12, and the thumb pushes the piston pusher 21 to move the bolus drive mechanism 2 forward in the bolus direction.

The end cap 13 has a bottomed cylindrical shape, and is provided with a female screw portion, and a male screw portion is provided at the rear end portion of the housing 11, and the end cap 13 can be attached to the rear end portion of the housing 11 by the engagement of the male screw portion and the female screw portion. The push rod 21 is inserted into the housing 11 through a through hole in the bottom wall of the end cap 13.

As shown in fig. 2, the plunger 21 of the bolus drive mechanism 2 is provided with a locking portion 21a, and the locking portion 21a can abut against the bottom surface of the end cap 13 to prevent the plunger 21 from falling off the housing 11.

<2.2, bolus drive mechanism >

As shown in fig. 1, 2, 3a, 7b, the bolus drive mechanism 2 includes a push rod 21, a connector 23, a bolus 24, and a push handle 25.

The push rod 21 has an elongated rod shape, and a push handle 25 is attached to a rear end of the push rod 21, and an operator can push or rotate the push handle 25 to move the push rod 21 forward. The rear end surface of the push lever 25 is formed to be concave so as to place the fingers of the operator.

The front portion of the push rod 21 includes a screw-on rod portion 22, and the screw-on rod portion 22 is formed of a threaded rod portion and is integrally formed with the push rod 21. In another embodiment, the push rod 21 may be molded separately from the push rod and fixed by assembly. A screw portion 44 (first screw portion) formed of an external thread portion is formed on the outer peripheral surface of the screw portion 22, and the screw portion 44 is engageable with a screw portion 43 (second screw portion) described later.

The connecting member 23 is attached to the front end of the twist lever portion 22. Specifically, a rotation coupling portion 22a is provided at the front end of the rotation coupling lever portion 22, a rotation coupling portion 23a is formed at the rear end of the link 23, and both rotation coupling portions are coupled to each other, so that the rotation coupling lever portion 22 and the link 23 are coupled to each other so as to be relatively rotatable but not movable forward and backward.

The injector 24 (which may also be referred to as an injector pin) is used to inject an intraocular lens (not shown) placed in the accommodating portion 11b into the eye by ejecting the intraocular lens from an introduction head (not shown). The bolus 24 is attached to the front end of the connector 23. Specifically, the rear end of the bolus 24 and the front end of the connecting member 23 are connected together by a fixing member 26 so as to be integrally moved in the front-rear direction. In the present embodiment, the fixing member 26 is a pin. As other embodiments, the bolus 24 and the connector 23 may be coupled together in other ways.

The plunger 21 is provided with a locking portion 21a, and the locking portion 21a is engaged with the end cap 13 to prevent the plunger 21 from falling off the housing 11.

<2.3, conversion mechanism >

The switching mechanism 4 is used for switching between a push-in operation mode and a screw-in operation mode, and has an operation member 45 having a screw portion 43 for screwing with a screw portion 44 of the screw rod portion 22, so that the screw rod portion 22 can move forward by rotation. The specific structure of the switching mechanism 4 will be described in detail below.

As shown in fig. 1 to 7a, the conversion mechanism 4 includes a conversion operation member 41, a return spring 42, an operation member 45, and the like.

As shown in fig. 1 to 4, the switching operation member 41 has a rectangular plate shape, is mounted on the housing 11 through the operation member 45 and the return spring 42, and is located outside the housing 11 for the operator to perform the pressing operation.

The actuator 45 is mounted on the housing 11. Specifically, as shown in fig. 3b, the housing 11 is provided with a mounting hole 11d formed of a through hole. The actuator 45 includes a rod portion 45a and a body portion 45b, and the rod portion 45a is in a shaft shape in the present embodiment and is inserted into the mounting hole 11d so as to be slidable (movable) in the inner-outer circumferential direction of the housing 11 with respect to the mounting hole 11d. The end of the lever portion 45a of the operating member 45 located outside the housing 11 is connected to the switching operating member 41. In the present embodiment, the operating element 45 and the switching operating element 41 are connected by a pin 46, and the pin 46 is inserted into the operating element 41 and the operating element 45 in the width direction of the rectangular plate-shaped switching operating element 41, and extends in the width direction so that the switching operating element 41 can rotate about (the axis of) the pin 46 with respect to the operating element 45.

Further, as shown in fig. 3b, the body portion 35b of the actuator 45 is positioned in the housing 11 and is larger than the diameter of the mounting hole 11d, so that the actuator 45 can be prevented from coming off the mounting hole 11d by the abutment of the body portion 35b against the inner peripheral wall of the housing 11. The body 45b is provided with a screw portion 43 formed of a female screw portion. The engaging portion 43 is engageable with the engaging portion 44, so that the engaging lever 22 can move forward and backward by rotation.

As described above, in the present embodiment, the operating element 41 is attached to the housing 11 via the operating element 45 and the return spring 42, but as another embodiment, the operating element 41 may have a direct attachment relationship with the housing 11.

The return spring 42 is installed between the switching operation element 41 and the outer surface of the housing 11, and is used to return the switching operation element 41 when the operator releases the pressing of the switching operation element 41, and when the switching operation element 41 is returned, the operation element 45 and the screwing portion 43 are returned accordingly. Therefore, it can be said that the return spring 42 is used to return the screw portion 43.

In fig. 1, 3a, and 3b, the switching operation element 41, the operation element 45, and the screwing portion 43 are in initial positions, that is, positions where the switching operation element 41 is not pressed by the operator. In this state, the engaging portion 43 is located at a position avoiding the engaging portion 44 and cannot be engaged with the engaging portion 44. When the operator pushes the switching operation element 41 to move closer to the outer surface of the housing 11, the operation element 45 moves accordingly, and the engaging portion 43 moves toward the inner peripheral side of the housing 11 to a position where it engages with the engaging portion 44, and in this state, when the operator rotates the push rod 21 to rotate the engaging rod portion 22, the rotation of the engaging rod portion 22 is converted into the forward and backward movement by the engagement of the engaging portion 43 with the engaging portion 44. This position of the screw portion 43 is referred to herein as the screw position. The position where the engaging portion 43 is located when the switching operation element 41 is not pushed by the operator is referred to as a retracted position.

When the operator releases the pressing of the switching operation element 41 as described above, the returning spring 42 returns the engaging portion 43 from the engaged position to the disengaged position.

In this way, the operator switches the implantation device 100 from the push-in operation mode to the screw-in operation mode by operating the switching operation member 41, and when the operator releases the operation of the switching operation member 41, the implantation device 100 is automatically switched from the screw-in operation mode to the push-in operation mode by the return spring 42 without being operated by the operator. Thus, the operation flexibility is improved, so that the operator can more freely change the mode of the implant device 100, and the operator can feel the operation convenience.

In the present embodiment, as shown in fig. 3b, the recess 41a is provided on the switching operation element 41, the recess 11c is provided on the housing 11, the recess 41a and the recess 11c are opened to face each other, one end of the return spring 42 is accommodated in the recess 41a, and the other end is accommodated in the recess 11c, so that the position of the end of the return spring 42 can be defined by the recess 11c and the recess 41a, and the position thereof can be prevented from being shifted or falling off. As another example, a concave portion may be provided in one of the housing 11 and the switching operation element 41.

In the present embodiment, the two conversion mechanisms 4 are provided, and they are disposed with the center line of the housing 11 in the front-rear direction, so that the operational stability of the screw rod portion 22 and the plunger 24 in the screw operation mode can be improved. As another embodiment, only one set of conversion mechanism 4 may be provided.

In the present embodiment, the single set of conversion mechanism 4 includes two return springs 42 (i.e., the first return spring and the second return spring) disposed with the operating member 45 interposed therebetween in the longitudinal direction of the conversion operating member 41, so that the rectangular plate-shaped conversion operating member 41 can be effectively kept in a balanced posture. Further, the structure in which the switching operation tool 41 can be rotated about the pin 46 provides a good operation feeling to the operator.

Specifically, since the switching operation element 41 is rotatable about the pin 46 with respect to the operation member 45 and is less restricted than the operation member 45 provided with the engaging portion 44, the operator can feel the spring force well when touching the switching operation element 41, and can feel a soft and good operation feeling. Further, since the two springs are disposed with the rotation center of the switching operation element 41 interposed therebetween, for example, compared to a structure in which the springs are fitted over the operation element 45, it is possible to avoid the end portions of the switching operation element 41 in the longitudinal direction from easily rotating and touching the housing 11, and it is possible to satisfactorily respond to the rotation of the switching operation element 41 and provide a better operation feeling for the operator.

However, the number of the return springs 42 is not necessarily limited, and for example, only one return spring may be provided, and in this case, the return spring may be fitted over the operation member 45. In addition, more than three return springs may be provided.

<2.3, injection spring 3>

As shown in fig. 1-3 a, inside the housing 11 there is a bolus spring 3, which bolus spring 3 is located between the front part of the housing 11 and the connector 23. The injection part spring 3 is compressed in the process that the injection driving mechanism 2 moves forwards, so that the injection driving mechanism 2 can retreat under the action of the injection part spring 3 at any time, and the defect that the retreat operation cannot be carried out in a push-in operation mode is overcome.

<2.4, injection guide Structure >

Fig. 8 is a schematic view for explaining a fitting structure of a housing and a plunger of the above-described intraocular implant implanting device.

As shown in fig. 8, the fixing member 26 includes a shaft-like portion 26a and a large head portion (an example of a guided portion) 26b. The shaft-like portion 26a is inserted into holes of both the connector 23 and the syringe 24 to connect them together. The large head portion 26b has a larger diameter than the shaft-like portion 26a, is of a substantially hemispherical head structure, and projects from the connector 23 to the outer peripheral side. A guide groove 11e is provided in an inner wall surface of the housing 11, and the guide groove 11e extends in the front-rear direction. The large head 26b is fitted in the guide groove 11e and guided by the guide groove 11 e. In this way, when the bolus 24 moves back and forth, the bolus 24 is guided by the guide groove 11e to operate stably without rotating.

As another embodiment, instead of forming the guided portion on the fixing member 26, the guided portion may be provided directly on the connecting member 23 or the injection member 24.

< 3> method for mounting/dismounting and operating implant device >

<3.1 > method of mounting/dismounting >

The implantation device 100 of the present embodiment can be repeatedly used, and is simple and convenient to assemble and disassemble. Specifically, the end cap 13 is detached from the rear end of the housing 11 by rotating counterclockwise, and at this time, the injection driving mechanism 2 and the injection spring 3 are pulled out together with the end cap 13 (see fig. 8), and then cleaning and sterilization are performed; after cleaning, the cleaning agent is put in the cleaning agent, the end cap 13 is screwed to the bottom, and the cleaning agent is screwed. Endcap 13 is only active during removal and installation of implant device 100 and is not active at any other time.

Further, the pin 46 can be pulled out from the switching operation tool 41 and the operation tool 45, and the switching operation tool 41 can be detached from the housing 11 for cleaning. At this time, the operation member 45 can be detached from the housing 11 for cleaning.

<3.2, method of operation >

In the implantation device according to the present embodiment, the following operation mode can be selected.

Simple push-in operation

When the operator does not perform the pushing operation of the switching operation member 41, the implantation device 100 is in the push-in operation mode by the return spring 42. At this time, the operator can hold the handle 12 with the index finger or middle finger, and press the rear end face of the push handle 25 with the thumb, so as to push the push rod 21 forward relative to the housing 11, and drive the screwing rod portion 22, the connecting member 23 and the injecting member 24 to move forward, so that the injecting member 24 pushes the intraocular lens placed in the accommodating portion 11b out of the introduction head and into the human eye.

Push-turn compound operation

When the operator does not perform the pushing operation of the switching operation member 41, the implantation device 100 is in the push-in operation mode by the return spring 42. At this time, the operator pushes the push rod 21 forward by a certain distance, and then, the operator presses the switching operation member 41 of the switching mechanism 4 to compress the return spring 42, so that the engaging portion 43 moves to the engaging position engaged with the engaging portion 44 in conjunction with the switching operation member 41, thereby switching the implanting device 100 to the screwing operation mode. In this mode, the operator rotates the push rod 21, and the rotation operation is converted into the forward movement of the screw rod 22 by the engagement of the screw portion 43 and the screw portion 44, and the injector 24 is further moved forward, thereby injecting the intraocular lens (i.e., the intraocular lens is pushed out of the introduction head and into the eye).

When performing the screwing operation, the operator can select to hold the hand-held portion 14 with one hand and perform the rotating operation of the push rod 21 with the other hand. Further, the plunger 24 can be retracted by reversely rotating the plunger 21.

< other embodiment >

The present embodiment is different from the above embodiments mainly in that the coupling member 23 in the above embodiments is omitted and the length of the screw-in lever portion 22 and the screw-in portion 44 is made longer. In the above embodiment, as shown in fig. 1 and the like, in the initial state where the operator does not push the push rod 21, the engaging portion 44 on the engaging lever portion 22 is located at a position not facing the engaging portion 43, and at this time, even if the operator pushes the switching operation element 41 to move the engaging portion 43 toward the inner circumferential side, the engaging portion 44 is not touched. In the present embodiment, however, since the length of the rotating-coupling lever portion 22 and the rotating-coupling portion 44 is increased, the rotating-coupling portion 44 (a part of the rotating-coupling portion) is located at a position facing the rotating-coupling portion 43 in the initial state, and at this time, the operator pushes the switching operation element 41 to move the rotating-coupling portion 43 toward the inner circumferential side, so that the rotating-coupling portion 43 can be rotated with the rotating-coupling portion 44.

Thus, the present embodiment can realize the following operation modes:

simple screw-in operation mode

That is, at the beginning of the implantation operation, the operator pushes the switching operation element 41 to screw the screwing portion 43 and the screwing portion 44 against the biasing force of the return spring 42, and in this state, the operator rotates the push rod 21 to advance the injector 24 to inject the intraocular lens.

It is understood that in the present embodiment, the operator can also execute the simple push-in operation mode and the push-out/rotation composite operation mode by selecting the timing of not pushing the switching operation element 41 and selecting the timing of pushing the switching operation element 41.

For example, in the push-and-turn compound operation mode, if the operator wants to switch the implantation device 100 from the screw-in operation mode to the push-in operation mode, the operator only needs to release the switch operation member 41, and the implantation device 100 will automatically switch to the push-in operation mode. In this way, the operator can freely and anytime switch the implant device 100 to the push-in operation mode, i.e., the above-described embodiments have the advantages of high operational flexibility, convenience in operation, etc.

In the embodiment shown in fig. 9, the same components as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the above description, the switching operation member 41 is of a push type (push button type), however, the present invention is not limited to this, and for example, a push lever switch type or a toggle switch type may be adopted as long as the swing portion 43 is moved between the swing position and the swing release position by the operation of the operator.

In the above embodiment, the engaging portion 43 and the engaging portion 44 are formed by the screw portion, and the screw portion may be a single screw or a multiple screw. The thread may be a full-circumference thread or a partial circumferential thread. In another embodiment, the mating engaging portions are threaded portions or spiral grooves on one side and projections that fit into the threaded portions or spiral grooves on the other side.

In the above embodiment, the switching operation element 41 and the operation element 45 are formed separately, but they may be formed integrally.

In the above embodiment, the operating member 45 linearly moves in the radial direction of the housing 11, however, the present invention is not limited to this, and may move in the radial direction while moving in the circumferential direction, for example.

In the above embodiment, the return spring 42 is a compression spring attached between the switching operation element 41 and the outer surface of the housing 11, but may be an extension spring attached between the operation element 45 and the inner surface of the housing 11 in another embodiment.

In the above embodiment, the pusher spring 3 is provided in the housing 11, but as another embodiment, the pusher spring 3 may be provided outside the housing 11 to apply the return biasing force to the push rod 21.

In the above embodiment, the engaging portion 43 and the engaging portion 44 are disposed in the housing 11, but the present invention is not limited to this, and an engaging portion that is interlocked with the switching operation member may be disposed outside the housing 11, and the engaging portion on the push rod side may be engaged with each other outside the housing 11.

It should be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application.

Claims

1. An intraocular implant implantation device, comprising:

a housing (11);

a push rod (21) having a first screw portion (44) and a front portion inserted into the housing (11);

a switching operation member (41) mounted on the housing (11);

a second rotating part (43) which can move to a rotating position rotating with the first rotating part (44) in linkage with the conversion operating element (41);

and a return spring (42) for returning the second engaging portion (43) to a retracted position where the engagement with the first engaging portion (44) is released.

2. The intraocular implant implantation device of claim 1,

the second screwing part (43) is arranged on the action piece (45);

the conversion operating part (41) is rotatably connected with the action part (45).

3. The intraocular implant implantation device of claim 2,

the return spring (42) includes a pair of springs disposed with a rotation center of the switching operation member (41) therebetween.

4. The intraocular implant implantation device of claim 2,

the return spring is disposed between an outer surface of the housing (11) and the switching operation member (41).

5. An intraocular implant implantation device according to any of claims 1-4,

the conversion operating part (41) is in a rectangular plate shape;

the return spring includes a pair of springs arranged along a length direction of the switching operation member (41).

6. An intraocular implant implantation device according to any one of claims 1-4, wherein a recess (41 a, 11 c) is provided on at least one of the housing (11) or the conversion operation member (41), and an end of the return spring (42) is accommodated in the recess (41 a, 11 c).

7. An intraocular implant implantation device according to any of claims 2-4,

a mounting hole (11 d) is formed in the shell (11);

the action piece (45) is slidably mounted in the mounting hole (11 d).

8. An intraocular implant implantation device according to any of claims 1-4,

further comprising: a connecting piece (23), wherein the connecting piece (23) is rotatably connected relative to the push rod (21);

the injection piece (24), the injection piece (24) is relatively fixed on the connecting piece (23) through a fixing piece (26);

a guide groove (11 e) is provided on the inner surface of the housing (11), the guide groove (11 e) extends in the front-rear direction, and the fixing member (26) is fitted in the guide groove (11 e).

9. The intraocular implant implantation device of claim 8,

the fixing member (26) includes a shaft-like portion (26 a) and a large head portion (26 b), the shaft-like portion (26 a) connecting the connecting member (23) and the injection member (24) together, and the large head portion (26 b) is fitted in the guide groove (11 e).

10. An intraocular implant implantation device according to any of claims 1-4,

further comprising an end cap (13), the end cap (13) being detachably mounted to the housing (11), a front portion of the push rod (21) being inserted into the housing (11) via the end cap (13).