Intraocular lens injector

Abstract

The present invention provides an intraocular lens injector with a relatively simple structure, which can realize two operation modes of push-in injection and screw-in injection. The intraocular lens injector of the present invention comprises an injector housing and an injection driving mechanism, an operation conversion component is arranged on the injector housing, and the operation conversion component is operated by an operator to move between a first position and a second position relative to the injector housing, and in the first position, the injection driving mechanism is in a screw-in operation mode, and in the second position, the injection driving mechanism is in a push-in operation mode, and is characterized in that the injection driving mechanism comprises a push rod, a first screw-in portion (21a) is arranged on the push rod, and a second screw-in portion (42) is fixedly arranged on the operation conversion component (4), and when the operation conversion component is located at the first position, the second screw-in portion moves to a screwable position capable of screwing with the first screw-in portion, and when the operation conversion component is located at the second position, the second screw-in portion moves to a non-screwable position.

Description

Technical Field

[0001] The invention relates to an intraocular lens injector, in particular to an intraocular lens injector which allows an operator to choose to use a screw-in injection mode or a push-in injection mode according to his / her own operating habits. Background Art

[0002] The intraocular lens injection system is a special surgical instrument used to implant a foldable soft intraocular lens into the human eye. By using this special implantation instrument, the soft intraocular lens can be implanted into the human eye through a small incision less than 3 mm.

[0003] The intraocular lens pusher system is composed of an introduction head component and an intraocular lens pusher assembly. The intraocular lens pusher is composed of an injector housing 1 and an injection drive mechanism component assembly, and its function is to provide a driving force for pushing the intraocular lens during the intraocular lens implantation process. The intraocular lens pusher is divided into a push-in structure intraocular lens pusher and a screw-in structure intraocular lens pusher according to the different implantation operation habits of the operator. The operator of the push-in structure intraocular lens pusher can push the relevant components of the injection drive mechanism forward with one hand to complete the intraocular lens implantation action, and the operation flexibility is relatively high; the operator of the screw-in structure intraocular lens pusher needs to use both hands to operate. During use, the operator needs to hold the injector housing 1 with one hand, and rotate the relevant components of the injection drive mechanism clockwise or counterclockwise with the other hand to complete the intraocular lens implantation action, and the operation stability is relatively high.

[0004] With the further development of intraocular lens injectors, intraocular lens injectors with a push-and-rotate integrated structure have appeared. Through the special structural design, the same intraocular lens injector can realize both push-in injection and screw-in injection operations, which is convenient and meets the needs of operators with different operating habits. The range of operators it targets is wider than that of lens injectors with a single push-in or single screw-in structure.

[0005] For example, Patent Document 1 discloses a push-and-rotate integrated intraocular lens injector, which has a foldable handle, and the push-in operation mode and the screw-in operation mode of the injection drive mechanism are switched by the folding action of the handle. In addition, Patent Document 2 also discloses a push-and-rotate integrated intraocular lens injector, in which a movable ball is engaged and released with a spiral groove to achieve the switching between the push-in operation mode and the screw-in operation mode.

[0006] However, the above-mentioned prior art has the following problems:

[0007] One is that the structure is relatively complex. That is, in Patent Document 1, a linkage mechanism is provided on the pusher housing 1, and the foldable handle can move the threaded plate member to a position that can be matched with the thread on the push rod of the push drive mechanism and move away from the position through the linkage mechanism. Since such a linkage mechanism is provided, the structure is complex and the manufacturing cost is high. In addition, in Patent Document 2, it is necessary to provide a ball and a groove for holding the ball, etc., so the structure is relatively complex, there are many parts, the installation is troublesome, and the manufacturing cost is high.

[0008] In addition, when the operator selects the push-in mode to implant the intraocular lens, the push-in drive mechanism component that provides the power for the lens push-in process can only maintain a single forward movement state at all times. It is unable to perform the push-in operation of retracting the lens push needle backwards and then pushing it forward again depending on the specific circumstances such as whether the lens is folded or the push needle component is clamped during or at the end of the push-in process.

[0009] <Prior Art Literature>

[0010] Patent document 1: WO2019195951A1

[0011] Patent document 2: CN101815484B Summary of the invention

[0012] In view of this, an object of the present invention is to provide an intraocular lens injector with a relatively simple structure and capable of realizing two operation modes of push-in injection and screw-in injection.

[0013] In addition, the present invention also aims to provide an intraocular lens injector which can realize the lens push needle component to retreat at any time and then push forward again during the pushing operation.

[0014] <Definition of terms>

[0015] Unless otherwise specified, the "front and back" in the present invention refers to the front and back direction in the injection direction, that is, the front and back direction in the moving direction of the injection drive mechanism.

[0016] The "screwing portion" mentioned in the present invention refers to a structure that can convert rotational motion into linear motion by mutual cooperation, and typically includes a thread and a spiral groove.

[0017] To achieve the above-mentioned purpose, the intraocular lens injector of the present invention comprises an injector housing and an injector drive mechanism, wherein the injector housing is provided with an operation conversion component for an operator to operate, the injector drive mechanism comprises a push rod, a first screw-on portion is provided on the push rod, and a second screw-on portion is fixedly provided on the operation conversion component, and the second screw-on portion is moved between a screwable position and a non-screwable position by operating the operation conversion component, in which the second screw-on portion can be screwed with the first screw-on portion, so that the injector drive mechanism is in a screw-in operation mode, and in the non-screwable position, the second screw-on portion will not be screwed with the first screw-on portion, so that the injector drive mechanism is in a push-in operation mode.

[0018] With the above structure, since the second screw-on part is fixedly arranged on the operation conversion component directly operated by the operator, the movement of the operation conversion component directly drives the second screw-on part to change its position, thereby realizing the switching between the screw-in operation mode and the push-in operation mode. Therefore, the structure is relatively simple and the manufacturing cost is relatively low.

[0019] In the present invention, preferably, the operation conversion member is operated to rotate relative to the injector housing, thereby moving between a first position corresponding to the screwable position and a second position corresponding to the non-screwable position.

[0020] In the present invention, the operation conversion member preferably rotates around an axis in a direction intersecting with the action direction of the push drive mechanism, or rotates around an axis in a direction parallel to the action direction of the push drive mechanism.

[0021] In the present invention, preferably, the injector housing comprises a housing body and a handle, and the second position is a position where the operation conversion member is fixed to the handle.

[0022] With the above structure, the operation conversion component is in a fixed state when in the second position, thereby avoiding hindering the operation of the operator and improving the reliability of operation. In addition, the operation conversion component is fixed by the handle, which can suppress the complexity of the structure.

[0023] In the present invention, preferably, the injector housing has a housing body, and the first position is a position where the operation switching member is fixed to the housing body.

[0024] With the above-described structure, the operation switching member can be held at the first position, and the push operation can be performed reliably.

[0025] Preferably, the present invention further comprises a spring for urging the injection drive mechanism toward an initial position before operation.

[0026] With the above structure, in the push operation mode, the spring can be used to perform the retraction operation of the push drive mechanism at any time, thereby improving operability.

[0027] Preferably, the spring is arranged inside or outside the shell body of the injector shell.

[0028] The present invention preferably further comprises a handle, a mounting plate extending backward is provided on the rear surface of the handle, and the operation conversion component is rotatably mounted on the mounting plate.

[0029] Preferably, in the present invention, a bayonet is provided on the operation conversion component, and a bayonet mounting groove is provided on the mounting plate, and the operation conversion component is engaged and fixed on the mounting plate by the engagement of the bayonet with the bayonet mounting groove.

[0030] Preferably, in the present invention, a first limiting groove for preventing the push drive mechanism from moving backward to an initial position before operation is provided on the shell body of the push injector shell.

[0031] The above structure can prevent the injection drive mechanism from returning to the initial position of the movement after the movement is completed, thereby preventing the intraocular lens injector from being reused.

[0032] Preferably, the push drive mechanism has a spring piece, which can be embedded in the first limiting groove and is configured to be unable to be separated from the first limiting groove by moving backward but can be separated from the first limiting groove by moving forward.

[0033] In the present invention, preferably, a second limiting groove for preventing the push drive mechanism from falling off from the housing body is provided at the rear end portion of the housing body of the push injector housing.

[0034] In the present invention, the push drive mechanism has a spring piece, which can be embedded in the second limiting groove and is configured to be unable to be separated from the second limiting groove by moving backward but can be separated from the first limiting groove by moving forward.

[0035] In the present invention, the first screwing part is preferably a threaded part or a spiral groove part, and the second screwing part is a circumferential partial threaded part. The second screwing part may have one, two or more threaded protrusions. When the first screwing part is a threaded part, it may be a single-threaded thread structure or a double-threaded thread structure.

[0036] In addition, to achieve the above-mentioned purpose, the intraocular lens implantation system of the present invention includes an intraocular lens injector and an introduction head of any of the above-mentioned structures.

[0037] In addition, to achieve the above purpose, a pre-installed intraocular lens includes an intraocular lens injector, an introduction head and an intraocular lens of any of the above structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a side view of an intraocular lens injector involved in a specific embodiment;

[0039] Figure 2 is a side sectional view of the intraocular lens injector;

[0040] Figure 3 is an oblique view of the housing of the injector;

[0041] Figure 4 is an oblique view of the injection device housing from another angle;

[0042] Figure 5 1 is a diagram showing the structure of a folded conversion sheet, wherein (a) is an oblique view, and (b) is an oblique view from another angle;

[0043] Figure 6 It is an oblique view of the assembly of the crystal push pin and the connecting block;

[0044] Figure 7 is an oblique view of the putter;

[0045] Figure 8 The figure shows a pre-assembled intraocular lens using the intraocular lens pusher, wherein (a) is an oblique view, (b) is an exploded structural view, and (c) is an oblique cross-sectional view;

[0046] Fig. 9 An intraocular lens implantation system using the intraocular lens pusher, wherein (a) is a side view, and (b) is an oblique view;

[0047] Fig.10 is an oblique view of the assembled push drive mechanism;

[0048] Fig.11 is an oblique view of the push drive mechanism with springs installed;

[0049] Fig.12 for Fig.11 The assembly body in the embodiment is assembled with the housing of the injector;

[0050] Fig.13 for Fig.12 The assembly in the figure is mounted on the upper cover at the rear of the housing;

[0051] Fig.14 for Fig.12 An enlarged cross-sectional view of the rear portion of the housing of the assembly;

[0052] Fig.15 For Fig.13 1. An explanatory diagram of installing a foldable conversion sheet on an assembly in FIG. 1, wherein (a) is a state where the foldable conversion sheet is fixed to the handle, and (b) is a state where the rotating shaft of the foldable conversion sheet has just been installed, which can also be regarded as a state where the foldable conversion sheet is released from the engagement and fixation with the handle;

[0053] Fig.16 This is an oblique view of the intraocular lens injector after assembly;

[0054] Fig.17 An oblique cross-sectional view for explaining the operation process of an intraocular lens injector;

[0055] Fig.18 is another oblique cross-sectional view illustrating the operation process of the intraocular lens injector;

[0056] Fig.19 Schematic diagram of the intraocular lens injector involved in Variation 1, wherein (a) is an oblique view and (b) is a side view;

[0057] Fig. 20 is an oblique view of the intraocular lens injector involved in Modification Example 2, wherein (a) shows the folding conversion sheet in an open state, and (b) shows the folding conversion sheet in a folded state buckled on the injector housing;

[0058] Fig.21 These are illustrations of the intraocular lens injector structure involved in Variation Example 3, wherein (a) is an oblique view with the folding conversion plate in an open state, (b) is an oblique view with the folding conversion plate in a folded state snapped onto the injector housing, and (c) is an oblique view from another angle with the folding conversion plate in an open state.

[0059] <Description of Reference Numerals>

[0060] 1 injector housing; 3 spring; 4 folding conversion sheet; 4' folding conversion sheet 5 introduction head; 6 gear; 11 housing body; 11a limit groove; 11b through hole; 11c limit groove; 11d engaging recess; 12 handle; 13 upper cover component; 21 piston push rod; 21a threaded portion; 21b rotating connector; 21c push-rotating operating head; 22 connecting block; 22a push rod connecting groove; 22b spring sheet; 23 push pin; 41 base; 42 threaded portion; 43 claw; 44 rotating shaft; 45 bayonet; 46 operating part; 100 intraocular lens injector; 121 folding conversion sheet mounting plate (mounting plate); 121a rotating shaft mounting groove; 121b bayonet mounting groove; 200 intraocular lens. DETAILED DESCRIPTION

[0061] In the following description, up, down, front and back directions are defined (also indicated in the relevant drawings), but these directions are set for the convenience of description and do not necessarily limit the present invention.

[0062] <1. Summary>

[0063] like Figure 1 , 2 As shown, the push-rotation integrated intraocular lens pusher (hereinafter referred to as intraocular lens pusher) 100 is mainly composed of a pusher housing 1, a pusher drive mechanism 2 (a threaded piston push rod 21, a lens push pin 23 and a connecting block 22 connecting the two), a spring 3, and a folding conversion sheet 4. When the folding conversion sheet 4 is in an unfolded state, the intraocular lens pusher 100 is in a push-in operation mode, which can realize the threaded piston push rod 21 of the pusher drive mechanism 2 along the longitudinal direction of the pusher housing axis (the pusher direction, Fig.12 When the folding conversion piece 4 is in the folded state, the intraocular lens injector 100 is in the screw-in operation mode, and the threaded piston push rod 21 of the injection drive mechanism 2 can be screwed in around the axis of the injection housing 1.

[0064] The intraocular lens pusher 100 can be designed to form a push-and-rotate integrated intraocular lens implantation system ( Fig. 9 ), it can also be designed to be a push-and-rotate pre-installed intraocular lens ( Figure 8 The intraocular lens pusher 100 has a selection function of a push-in operation mode and a screw-in operation mode before the push action starts. In the push-in operation mode, the push drive mechanism 2 can realize the retraction operation at any time under the action of the spring 3. The intraocular lens pusher 100 has the characteristics of light weight, small push resistance, easy use and simple structure.

[0065] The main components of the intraocular lens injector 100 are described below. In the following description, unless otherwise specified, each component is described in the installed state (especially the description related to the direction).

[0066] <2. Main structural elements>

[0067] <2.1. Injector housing>

[0068] like Figure 3 , 4 As shown, the pusher housing 1 has a cylindrical housing body 11, the front end of which can be connected to the introduction head 5 ( Fig. 9), and the rear end can be connected to the push drive mechanism 2. A through-limiting groove 11a (first limiting groove) can be designed on the peripheral wall of the shell body 11 to prevent the push drive mechanism 2 from returning to the initial position of the movement after the movement is completed. The limiting groove 11a is in the shape of a long groove extending in the front-to-back direction. Figure 8 ), the front end of the housing body 11 may be designed with a crystal bearing area for placing the built-in artificial crystal 200 ( Figure 8 ), and at the same time, the front end of the shell body 1 can also be connected to the introduction head component.

[0069] A handle 12 extending toward the outer peripheral side is provided on the outer peripheral surface of the shell body 11, and the handle 12 has a portion located on the upper side of the shell body 11 and a portion located on the lower side of the shell body 11 (referred to as an upper handle portion and a lower handle portion). When performing a pushing operation, the operator's (usually) index finger and middle finger are respectively gripped on the front surfaces of the upper handle portion and the lower handle portion of the handle 12, and the thumb pushes the piston push rod 21 to move the injection drive mechanism 2 forward in the injection direction.

[0070] A pair of left and right folding conversion piece mounting plates 121 are formed on the rear surface of the upper handle portion of the handle 12. The folding conversion piece mounting plates 121 extend backward from the rear surface of the upper handle portion, and the lower ends thereof are connected to the outer peripheral surface of the housing body 1. A rotating shaft mounting groove 121a (rotating shaft mounting portion) is formed at the lower portion of each of the pair of folding conversion piece mounting plates 121, and a bayonet mounting groove 121b (corresponding to the handle side engaging portion in the present invention) is formed at the upper portion of one of the folding conversion piece mounting plates 121.

[0071] In addition, at the rear end portion (the rear end portion, i.e., the portion located behind the handle 12) of the shell body 11, a through hole 11b is provided on its upper surface, a through limiting groove 11c (the second limiting groove) is provided on the lower surface, and a snap-fitting recess 11d (snap-fitting portion) is provided on the left and right side surfaces.

[0072] <2.2, injection drive mechanism (piston push rod, crystal push needle, connecting block)>

[0073] like Figure 2 As shown, the push-injection driving mechanism is mainly composed of a crystal push pin 23 (referred to as a push pin, corresponding to the push-injection component in the present invention), a connecting block 22, and a threaded piston push rod 21, wherein the crystal push pin 23 is installed at the front of the connecting block 22, and the piston push rod 21 is connected to the rear of the connecting block 22. In addition, the push pin 23 and the connecting block 22 can also be an integrated component.

[0074] In addition, if Figure 2 , 7As shown, the piston push rod 21 has a threaded portion 21a on its surface, a push-rotation operating head 21c which is a large diameter portion at the rear end, and a rotary connector 21b at the front end. The threaded portion 21a on the piston push rod 21 is used to mate with the threaded portion 42 ( Figure 5 ) are screwed together, so that the piston push rod 21 can be screwed in and moved forward. In addition, the threaded portion 21a can be a single-line thread structure or a double-line thread structure.

[0075] like Figure 6 As shown, a push rod connection groove 22a is provided at the rear end of the connection block 22, and the rotary connector 21b of the piston push rod 21 is engaged in the push rod connection groove 22a in a manner that it can rotate but cannot move forward and backward (especially backward). In this way, the piston push rod 21 can rotate relative to the connection block 22, but cannot move forward and backward. In addition, a spring piece 22b is provided on the lower side of the connection block 22, and the spring piece 22b can be engaged with the limiting groove 11c on the shell body 11 to prevent the connection block 22 from falling off the shell body 11. Specifically, the spring piece 22b is configured to be elastically deformable and move up and down, and has a claw portion 22b1 protruding downward, which is embedded in the limiting groove 11c, and the front and rear surfaces of the claw portion are configured as inclined surfaces inclined downward and backward. Thus, when the claw is inserted into the limiting groove 11c, it cannot move backwards to escape from the limiting groove 11c, but can move forwards to escape from the limiting groove 11c by elastic deformation.

[0076] like Figure 2 , Fig.18 As shown in the figure, on the shell body 11, the limit groove 11a is located in front of the limit groove 11c. When the push-in action is performed, the spring piece 22b of the connecting block 22 disengages from the limit groove 11c and continues to move forward, and then moves to the position of the limit groove 11a and engages with the limit groove 11a, and then moves forward along the limit groove 11a, but cannot move backward and disengage from the limit groove 11a, thereby preventing the push-in drive mechanism 2 from returning to the initial position before the operation. The structure in which the spring piece cooperates with the limit groove is not only suitable for an integrated push-and-rotate intraocular lens injector, but also can be suitable for a pure push-in intraocular lens injector or a pure screw-in intraocular lens injector. In addition, Fig.18 The spring piece 22b in the figure is shown in a natural state, but in fact it should be elastically deformed upward.

[0077] In addition, the rear surface of the claw portion may not be an inclined surface but may be a flat surface extending in the up-down direction (ie, a flat surface perpendicular to the front-rear direction).

[0078] <2.3、Folding conversion sheet>

[0079] The function of the folding conversion piece 4 is mainly to switch between the push-in operation mode and the screw-in operation mode. The threaded portion 42 on the folding conversion piece 4 is screwed with the threaded portion 21a on the piston push rod 21, so that the threaded piston push rod 21 can move forward due to the screw-in operation. The specific structure of the folding conversion piece 4 is described in detail below.

[0080] like Figure 1 , 2 As shown, the folding conversion sheet 4 is mounted on the folding conversion sheet mounting plate 121. Specifically, as Figure 5 As shown, the folding conversion plate 4 has a base 41 which is roughly plate-shaped, and a rotating shaft 44 is provided on the lower side of the base 41. The rotating shaft 44 is installed in the rotating shaft mounting groove 121a of the folding conversion plate mounting plate 121, so that the folding conversion plate 4 can rotate around the rotating shaft 44 (around the axis in the left-right direction, or around the axis perpendicular to the injection direction).

[0081] In addition, an operating portion 46 protruding upward is provided on the upper side of the base portion 41 of the folding conversion piece 4, and a bayonet 45 (corresponding to the conversion piece side engaging portion in the present invention) is formed on one side of the operating portion 46. The bayonet 45 can be engaged in the bayonet mounting groove 121b of the folding conversion piece mounting plate 121, so that the position of the folding conversion piece 4 is fixed. In addition, the operator can release the engagement between the bayonet 45 of the folding conversion piece 4 and the bayonet mounting groove 121b by pulling the operating portion 46, so that the folding conversion piece 4 can be rotated.

[0082] In addition, a threaded portion 42 is provided on the rear surface of the base portion 41 of the folding conversion piece 4. The threaded portion 42 is an incomplete circumferential partial thread and has two thread protrusions (thread teeth). As another embodiment, there may be only one thread protrusion or multiple thread protrusions.

[0083] In addition, a pair of claws 43 are provided on both sides of the base of the folding conversion piece 4 , and the claws 43 are engaged with the engaging recesses 11 d on the housing body 11 , so that the folding conversion piece 4 is engaged and fixed to the housing body 11 .

[0084] In this embodiment, the foldable conversion sheet 4 and the shell body 11 are two independent parts assembled together. As another embodiment, they can also be an integrated part, that is, the shell body 11 has a foldable conversion sheet structure, and the center of the folding action is composed of a thin-walled part.

[0085] When the folding conversion piece 4 is in the initial unfolded state (the state of being engaged and fixed on the handle 12, the position at this time corresponds to the second position in the present invention), the piston push rod 21 of the push drive mechanism 2 can make a simple longitudinal forward and backward movement along the axis of the shell. When the folding conversion piece 4 is in the folded state (the engagement with the handle 12 is released and rotated to the state of being engaged and fixed on the shell body 11, the position of the folding conversion piece 4 at this time corresponds to the first position in the present invention), the threaded portion 42 moves through the through hole 11b on the shell body 11 to a position where it can be screwed with the threaded portion 21a of the piston push rod 21, so that the threaded piston push rod 21 of the push drive mechanism 2 can move forward and backward due to the screwing operation, thereby performing the push action.

[0086] <2.3, Spring>

[0087] like Figure 2 As shown, a spring 3 is provided inside the housing body 11, and the spring 3 is located between the front part of the housing body 11 and the connecting block 22. The spring 3 is compressed during the forward movement of the push drive mechanism 2 in the push operation mode, so that the push drive mechanism 2 can perform a retreat action at any time under the action of the spring 3, avoiding the disadvantage that other push drive mechanisms cannot perform a retreat operation in the push operation mode.

[0088] <2.5. Pre-installed intraocular lens and push-and-rotate integrated intraocular lens implantation system>

[0089] like Figure 8 As shown, the intraocular lens pusher 100 can be applied to pre-installed intraocular lenses. In this case, the push-and-rotate pre-installed intraocular lens needs to design an intraocular lens bearing area at the front end of the pusher shell 1, and the intraocular lens 200 is placed in the lens bearing area, and then the introduction head 5 is assembled. In this way, the intraocular lens is pre-installed in the implanter, and the intraocular lens 200 is subsequently packaged and sterilized together with the intraocular lens pusher 100. When in use, the package is opened and the viscoelastic agent is directly injected. The intraocular lens implantation operation can be completed by pushing or rotating.

[0090] like Fig. 9As shown, the intraocular lens pusher 100 cooperates with the introduction head 5 to form a push-and-rotate integrated intraocular lens implantation system. This introduction head 5 can be divided into a detachable push-and-rotate integrated intraocular lens implantation system and an assembled push-and-rotate integrated intraocular lens implantation system according to the design. When the detachable type is used, it is necessary to complete the operations of perfusing the introduction head with viscoelastic agent, loading the intraocular lens on the introduction head, and assembling the introduction head component loaded with the intraocular lens on the push-and-rotate integrated intraocular lens pusher. When the assembled push-and-rotate integrated intraocular lens implantation system is used, it is necessary to complete the operations of perfusing the introduction head with viscoelastic agent, loading the introduction head with the intraocular lens, but because the introduction head and the pusher are assembled together, there is no need to complete the operation of assembling the introduction head component loaded with the intraocular lens on the push-and-rotate integrated intraocular lens pusher.

[0091] <3. Assembly and operation of the push-rotate crystal injector>

[0092] <3.1. Assembly method of intraocular lens injector>

[0093] like Fig.10 As shown, first, assemble the push drive mechanism 2. After the assembly is completed, the crystal push pin 23 and the connecting block 22 are equivalent to an integral component, and the assembly positions are fixed to each other. The assembled threaded piston push rod 21 can rotate in the push rod connecting groove 22a of the connecting block 22. At the same time, if the piston push rod 21 makes a forward and backward push movement, the push drive mechanism 2 will move together as an integral component.

[0094] Afterwards, if Fig.11 As shown, a spring 3 is placed on the crystal push pin 23. The resulting assembly is as shown in FIG. Fig.12 As shown in the figure, the housing body 11 is inserted from the rear end. Afterwards, in this embodiment, an upper cover component 13 and a lower cover component 14 opposite to the upper cover component are mounted on the rear end of the housing body 1, and the two components are not only engaged with the housing body 11, but also engaged with each other. In addition, the upper cover component 13 and the lower cover component 14 are not necessarily required components.

[0095] After the above assembly is completed, Fig.12 or Fig.13 In the state, spring 3 is in a compressed state. However, if Fig.14 As shown, because the spring piece 22b on the connecting block 22 is engaged with the limiting groove 11c at the rear of the shell body 11, the spring 3 can be kept in a compressed state and the push drive mechanism 2 will not fall out of the pusher shell 1. In addition, the upper cover component 13 and the lower cover component 14 at the rear are added to make the structure more stable.

[0096] <3.2、Operation method of intraocular lens injector>

[0097] like Fig.16 ,17 As shown, when the folding sheet conversion sheet 4 is in the unfolded and engaged state, the structure of the intraocular lens injector 100 is no different from the structure of an ordinary push-in lens injector with a typical structure. In this way, if the operator is accustomed to the one-handed push-in operation, the operation can be performed directly. Moreover, since a spring 3 is installed in the shell body 11, the push-in drive mechanism 2 can be retracted under the action of the spring 3 at any time during the push-in action (as shown above, the spring 3 is in a pre-compression state after the injector is assembled), thereby increasing the flexibility of the operation and improving the reliability of the lens implantation operation.

[0098] In addition, if the operator wants to perform two-hand rotation operation, such as Fig.15 As shown, the operator releases the folding conversion plate 4 from the engagement with the handle 12 by pulling the operating portion 46, and rotates it around the rotating shaft 44 to a position (first position) where the threaded portion 42 can be screwed with the threaded portion 21a of the piston push rod 21. At this time, the position of the threaded portion 42 corresponds to the "screwable position" in the present invention. Fig.18 As shown, when the folding sheet conversion sheet is in the folded state, the injection drive mechanism 2 of the intraocular lens injector 100 will no longer be able to move forward longitudinally along the axis of the shell body 11 due to the influence of the foldable conversion sheet 4 after advancing a specified distance (Note: the distance that the injection drive mechanism component moves forward can be adjusted according to design requirements). However, at this time, the threaded portion 42 of the folding conversion sheet 4 just contacts the threaded portion 21a of the piston push rod 21 of the injection drive mechanism 2. In this way, under the cooperation of the threaded portions of the two components, the piston push rod 21 can move the injection drive mechanism 2 forward by rotating around the axis in the front-to-back direction, thereby realizing the screw-in injection operation, meeting the needs of users who are accustomed to two-handed screw-in operations.

[0099] In this embodiment, since the threaded portion 42 (an example of a screw-on portion) is fixedly provided on the folding conversion plate 4 (operation conversion component), it moves with the movement of the folding conversion plate 4 to switch the pushing operation mode and the screwing operation mode of the intraocular lens injector 100 (injection drive mechanism 2). Therefore, unlike the prior art, there is no linkage mechanism provided between the threaded portion and the operation conversion component, thereby simplifying the structure and reducing the manufacturing cost.

[0100] The push-and-rotate integrated intraocular lens injector of the present invention is clearly designed and intended for use. Before use, the operator can choose whether to fold down the folding conversion sheet component according to his or her own operating habits. If it is not folded, the push-in operation mode is selected, and if it is folded down, the screw-in operation mode is selected. At the same time, due to the presence of the spring 3, the push-in drive mechanism 2 can be retracted during the push-in operation, thereby making the push-in operation more adjustable, flexible and reliable.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0102] <Modification 1>

[0103] Fig.19 FIG. 1 is a schematic diagram of an intraocular lens injector involved in Variation 1. Fig.19 As shown, different from the above embodiment, the spring 3 is arranged on the outside of the shell body 11. Specifically, the spring 3 is sleeved on the piston push rod 21. The spring 3 is located between the rear end surface of the shell body 11 and the push-rotation operating head 21c of the piston push rod 21 in the front-to-back direction.

[0104] <Modification 2>

[0105] Fig. 20 This is the intraocular lens injector involved in variation example 2.

[0106] In the above-mentioned embodiment, the folding conversion piece 4 (an example of the operation conversion member) rotates around the axis in the direction perpendicular to the front-rear direction, and in this modified example, Fig. 20 As shown, the folding conversion piece 4 is configured to rotate (i.e., perform a folding action) with the axis in the front-rear direction as the center. In addition, the folding conversion piece 4 can be a single component or a part of the housing, or can be a plurality of integrated multi-stage foldable components that can act together. In addition, as other embodiments, the operation conversion component can be moved relative to the injection device housing 1 in other ways.

[0107] <Variation 3>

[0108] Fig.21 FIG. 2 is an illustration of the structure of the intraocular lens pusher involved in Modification Example 3. Fig.21 As shown, in this modified example, in addition to the above-mentioned folding conversion piece 4, another folding conversion piece 4' is provided at the lower side, and the two are linked by two gears 6.

[0109] In addition, in the above-mentioned embodiment, a threaded portion as a standard structure is illustrated as a screw-on portion, however, other structures may also be used. For example, instead of the threaded portion 42, a dot-shaped protrusion is provided on the folding conversion component 4, and the rotation operation of the piston push rod 21 is converted into forward and backward movement through the cooperation of the protrusion and the thread groove or spiral groove.

Claims

1. An intraocular lens injector, comprising an injector housing (1) and an injector drive mechanism (2), wherein an operation conversion component for an operator to directly operate is provided on the injector housing (1), characterized in that: The push rod (2) comprises a push rod (21), the push rod (21) being capable of moving forward and backward relative to a housing body (11) of the pusher housing (1) in a push direction, and a first screwing portion being provided on the push rod (21). A second screw-on portion is fixedly provided on the operation conversion component without a linkage mechanism, and the second screw-on portion is moved between a screwable position and a non-screwable position by operating the operation conversion component. In the screwable position, the second screwing portion can be screwed together with the first screwing portion, so that the injection drive mechanism (2) is in a screw-in operation mode. In the non-screwing position, the second screwing portion will not screw with the first screwing portion, and will not prevent the push rod (21) from moving forward and backward, so that the push drive mechanism (2) is in a push operation mode. In the rotatable position, the operation conversion component is snap-fitted and fixed on the housing body (11). The operation conversion component is operated to rotate relative to the housing body (11), thereby moving between a first position corresponding to the screwable position and a second position corresponding to the non-screwable position.

2. The intraocular lens injector according to claim 1, characterized in that: The operation conversion member rotates around an axis in a direction intersecting the push direction, or rotates around an axis in a direction parallel to the push direction.

3. The intraocular lens injector according to claim 1, characterized in that: The injector housing (1) further comprises a handle (12), and the second position is a position where the operation conversion component is fixed to the handle (12).

4. The intraocular lens injector according to claim 1, characterized in that: It also comprises a spring (3) for applying force to the injection drive mechanism (2) toward an initial position before operation.

5. The intraocular lens injector according to claim 4, characterized in that: The spring (3) is arranged inside or outside the housing body (11) of the injector housing (1).

6. The intraocular lens injector according to any one of claims 1, 2, 4 and 5, characterized in that: A handle (12) is also provided, on the rear surface of which a mounting plate extending backwards is provided, and the operation conversion component is rotatably mounted on the mounting plate.

7. The intraocular lens injector according to claim 6, characterized in that: A bayonet is provided on the operation conversion component, and a bayonet mounting groove is provided on the mounting plate. The operation conversion component is engaged and fixed on the mounting plate by the engagement of the bayonet and the bayonet mounting groove.

8. The intraocular lens injector according to claim 7, characterized in that: The mounting plates are a pair of left and right mounting plates, and only one of the mounting plates is provided with the bayonet mounting groove. There is only one bayonet, and the bayonet mounting groove is arranged on the upper part of the mounting plate.

9. The intraocular lens injector according to claim 6, characterized in that: The mounting plates are a pair of left and right mounting plates, and a rotating shaft mounting groove is provided at the lower part of each pair of mounting plates. The operation conversion component is provided with a rotating shaft, and the rotating shaft is installed in the rotating shaft installation groove, so that the operation conversion component can rotate around the rotating shaft.

10. The intraocular lens injector according to any one of claims 1 to 5, characterized in that: A first limiting groove is provided on the housing body (11) of the pusher housing (1) for preventing the pusher drive mechanism (2) from moving backward to an initial position before operation.

11. The intraocular lens injector according to claim 10, characterized in that: The push injection drive mechanism (2) has a spring sheet (22b), which can be embedded in the first limiting groove and is configured to be unable to be separated from the first limiting groove by moving backward but can be separated from the first limiting groove by moving forward.

12. The intraocular lens injector according to claim 11, characterized in that: A second limiting groove is provided at the rear end of the shell body (11) of the pusher shell (1) for preventing the push drive mechanism (2) from falling off the shell body (11).

13. The intraocular lens injector according to claim 12, characterized in that: The push injection drive mechanism (2) has a spring piece (22b), which can be embedded in the second limiting groove and is configured to be unable to be disengaged from the second limiting groove by moving backward but can be disengaged from the first limiting groove by moving forward.

14. The intraocular lens injector according to any one of claims 1 to 5, characterized in that: The first screw-on portion is a threaded portion, and the second screw-on portion is a circumferential partial threaded portion.

15. The intraocular lens injector according to claim 14, characterized in that: The first screw-on portion is a single-thread structure or a multi-thread structure.

16. The intraocular lens injector according to claim 14, characterized in that: The second screw-on portion has one, two or more thread protrusions.

17. The intraocular lens injector according to any one of claims 1 to 5, characterized in that: The first screw-on portion is a spiral groove portion, and the second screw-on portion is a circumferential partial thread portion.

18. The intraocular lens injector according to any one of claims 1 to 5, characterized in that: A through hole (11b) is provided on the shell body (11) of the injection device shell (1). The through hole (11b) is provided on the upper surface of the rear end of the shell body (11) and is located behind the handle. The second screw-on portion moves to the screwable position via the through hole (11b).

19. The intraocular lens injector according to any one of claims 1 to 5, characterized in that: The operation conversion member is a folding conversion piece having a substantially plate-shaped base, and the second screw-on portion is provided on one surface of the base.

20. The intraocular lens injector according to claim 19, characterized in that: The base is provided with claws on both sides thereof, and the housing body is provided with an engaging recess. The operation conversion component can be engaged and fixed to the housing body by engaging the claws with the engaging recess.

21. The intraocular lens injector according to claim 19, characterized in that: An operation portion protruding upward is provided on the upper side of the base.

22. An artificial lens implantation system, characterized in that: It comprises the intraocular lens injector and introduction head as described in any one of claims 1-21.

23. A pre-assembled intraocular lens injector, characterized in that: It comprises the intraocular lens injector, the introduction head and the intraocular lens as described in any one of claims 1 to 21.

Images