CN117338478A - Non-preassembled intraocular lens injector - Google Patents

Abstract

The utility model provides a non-preassembly intraocular lens injector, includes sleeve pipe, push rod, push head, leading-in head installs in sheathed tube front end, the push head is installed in the front end of push rod, the push rod movably wears to locate the sleeve pipe and enable the push head to get into leading-in head and push out intraocular lens, sleeve pipe, push rod, push head, leading-in head are flat structure, be provided with damping structure on the surface of push rod, damping structure is the structure spring that produces damping with sleeve pipe inner wall extrusion fit, the surface of structure spring is equipped with one-way buckle, one-way buckle protrusion push rod surface sets up, the sleeve pipe rear end is equipped with the sleeve pipe bayonet socket with one-way buckle lock initial positioning push rod. The unidirectional buckle is buckled on the bayonet of the sleeve to realize the initial positioning of the push rod and the sleeve. The unidirectional buckle on the structural spring and the extrusion profile damping on the inner wall of the sleeve provide proper hand feeling for push injection.

Description

Non-preassembled intraocular lens injector

Technical Field

The invention belongs to the field of intraocular lens injection molding devices, and particularly relates to a non-preassembled intraocular lens injection molding device.

Background

As one of the cataract surgery methods, a method of inserting an artificial intraocular lens into an eye to treat the eye after removing a clouded lens in the eye is generally used. Intraocular lenses are inserted into the eye using an insertion device called a bolus. The injector is composed of an instrument body having a loading part for loading the intraocular lens and an insertion part for guiding the intraocular lens into the eye, and an pushing member for pushing the intraocular lens to the outside with the tip end abutting against the intraocular lens. The intraocular lens is pushed in by the push-out member and is released into the eye while being folded inside the insertion part. Therefore, the incision wound can be reduced, and the operation burden on the patient can be reduced.

The existing intraocular lens injector is not tightly assembled and the fitting gap of the fitting is large, so that dislocation and deviation phenomena are easy to occur when a doctor operates the intraocular lens injector, operation failure is caused, and improvement is needed. And the initial position of the push rod cannot be limited, so that misoperation is easy to occur.

Disclosure of Invention

Aiming at the problems existing in the introduction of the background technology, the invention aims to provide a non-preassembled intraocular lens injector which is simple to operate, more controllable in intraocular lens introduction, capable of preventing misoperation, stable in pushing of a push rod and capable of realizing one-hand operation and pull-back.

The technical scheme adopted by the invention is as follows:

the utility model provides a non-preassembly intraocular lens injector, includes sleeve pipe, push rod, push head, leading-in head installs in sheathed tube front end, the push head is installed in the front end of push rod, the push rod is movably worn to locate in the sleeve pipe and enable the push head to get into leading-in head and push away the intraocular lens, sleeve pipe, push rod, push head, leading-in head all are flat structure, its characterized in that: the damping structure is a structural spring which is matched with the inner wall of the sleeve in an extrusion mode to generate damping, a unidirectional buckle is arranged on the outer surface of the structural spring, the unidirectional buckle protrudes out of the surface of the push rod, and a sleeve bayonet which is matched with the unidirectional buckle in a buckling mode to initially position the push rod is arranged at the rear end of the sleeve. The unidirectional buckle is buckled on the bayonet of the sleeve to realize the initial positioning of the push rod and the sleeve. The unidirectional buckle on the structural spring and the extrusion profile damping on the inner wall of the sleeve provide proper hand feeling for push injection.

Further, the leading-in head is including placing the crystal chamber of crystal, the one end in crystal chamber is equipped with the connecting portion that is used for with the sleeve pipe connection, and its other end is equipped with the head that supplies the intraocular lens to inject into the eye through the pushing away, the head has the port, the cavity way of head from crystal chamber to port is by wide narrowing structure, the upper edge of the cross-section of cavity way is flat structure, and its lower edge is the arc structure. When the artificial lens is pushed to the port for movement, the cavity is narrowed from wide to flat, the front loop can be extruded above the artificial lens, the whole artificial lens is folded from bottom to top, and the gesture can be better and more controllably completed for pushing injection.

Further, the crystal cavity is a flat structure, the bottom of the inner cavity of the crystal cavity is of an arc structure, the cavity and the cavity channel are in smooth communication, an upper cover capable of opening and closing the cavity is arranged on the crystal cavity, one side of the upper cover is hinged with the crystal cavity, the other side of the upper cover is in buckle connection with the crystal cavity, a pressing block which is in contact with the artificial crystal after being covered is arranged on the inner surface of the upper cover in a protruding mode, and the structure of the pressing block is consistent with the opening structure of the cavity. The invention can be used by directly placing the artificial crystal into the crystal cavity and covering the crystal cavity with the upper cover, and has simple operation; the upper cover is of a flip structure, so that the use is more convenient. After the cover is closed, the surface of the pressing block is flush with the upper side of the inner surface of the cavity, so that the reliability of intraocular lens injection is ensured.

Further, the front part of the port is a slope opening structure with a downward slope, and the rear part of the port is provided with a boss structure for operation positioning. The boss structure has obvious reminding function, can play a role in positioning when a doctor operates, and is not too deep to insert into eyes.

Further, the cross-section structure of the connecting part is consistent with the cross-section structure of the tube cavity of the sleeve, the connecting part is in buckling connection after being inserted with the sleeve, and elastic clamping pieces used for being connected with the sleeve are arranged on two sides of the connecting part.

Further, the rear end of the push rod is provided with a push plate for pushing the push rod forwards, the rear end of the sleeve is provided with a hand-held arm which is matched with the push plate to push the push rod forwards, the sleeve is provided with a pull-back structure which is matched with the push plate to pull the push rod back, and the pull-back structure is a small baffle arm which is arranged on the lower surface of the sleeve in a protruding mode and is positioned in front of the hand-held arm. The front limit of the finger is realized by the small baffle arm, and the push rod can be pulled back through being matched with the push plate.

Further, the handheld arm is vertical to the sleeve and protrudes out of the upper surface and the lower surface of the sleeve, and the height of the lower surface of the small baffle arm protruding out of the sleeve is smaller than that of the handheld arm protruding out of the lower surface of the sleeve. The index finger and the middle finger are respectively contacted with the hand-held arms at the upper surface and the lower surface, so that the thumb can push the push rod forwards. A space for accommodating the middle finger is formed between the hand-held arm and the small baffle arm on the lower surface, so that front and back limiting of the middle finger is realized, and both forward pushing and backward pulling can be operated by one hand.

Further, the pushing plate is a semicircular hook structure, and the surface of the pushing plate contacted with the front side of the thumb is a plane structure. When the push rod is used, the thumb is placed into the semicircular hook, the push rod can be pushed forwards, the push rod can be pulled backwards by force, and the use is more convenient.

Further, the structural springs are symmetrically arranged on two sides of the push rod, an inner groove is formed in the surface of the push rod, and the structural springs are arranged in the inner groove.

Further, the wall surface of the sleeve is gradually narrowed from the rear end to the front end. The sleeve provides greater damping to the structural spring, i.e., the damping of the structural spring throughout the bolus is variable.

Compared with the prior art, the invention has the remarkable advantages that:

1. the damping structure is arranged to prevent misoperation, and the push rod is pushed stably.

2. The structure of the leading-in head ensures that the operation is simple, the use is convenient, and the artificial crystal leading-in is more controllable.

3. The push rod pulling back structure is arranged, single-hand operation pulling back can be realized, the push rod pulling back structure is suitable for push rod pulling back operation in preparation or in the process of push injection, and the structure is simple and reasonable.

Drawings

Fig. 1 is a schematic view of a first construction of the present invention.

Fig. 2 is a schematic diagram of the explosive structure of the present invention.

Fig. 3 is a schematic view of the structure of the upper cover of the present invention after opening.

FIG. 4 is a schematic view of the structure of the introduction head of the present invention.

Fig. 5 is a schematic structural view of the push rod of the present invention.

Fig. 6 is a schematic view of the internal arrangement of the present invention in a front view.

FIG. 7 is a schematic view of the cross-sectional structure of A-A in FIG. 6.

Fig. 8 is a schematic structural view of an intraocular lens.

Fig. 9 is a schematic diagram of the post-intraocular lens placement bolus process of the present invention.

Fig. 10 is a schematic view of a second construction of the present invention.

In the figure: 1-an introduction head; 11-a crystal cavity; 111-cavity; 112-upper cover; 113-briquetting; 12-connecting part; 121-elastic clip; 122-slots; 13-head; 131-port; 132-lumen; 1321-upper edge; 1322-lower edge; 133-boss structure; 2-pushing heads; 3-pushing rod; 31-structural springs; 32-one-way buckle; 33-an inner groove; 34-front section; 35-middle section; 36-rear section; 37-pushing plate; 4-sleeve; 41-sleeve bayonet; 42-a support; 43-through holes; 44-a hand-held arm; 45-small gear arm; 46-connecting ports; 5-an artificial lens; 51-anterior haptic; 52-crystalline optical region.

Detailed Description

The invention will be further illustrated with reference to the following specific examples, without limiting the invention to these specific embodiments. It will be appreciated by those skilled in the art that the invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Example 1

Referring to fig. 1-9, the present embodiment provides a non-preloaded intraocular lens injector, which comprises a sleeve 4, a push rod 3, a push head 2 and an introduction head 1, wherein the introduction head 1 is mounted at the front end of the sleeve 4, the push head 2 is mounted at the front end of the push rod 3, the push rod 3 is movably arranged in the sleeve 4 in a penetrating manner and enables the push head 2 to enter the introduction head 1 to inject an intraocular lens, and the sleeve 4, the push rod 3, the push head 2 and the introduction head 1 are all in a flat structure.

The introducing head 1 according to this embodiment includes a crystal chamber 11 in which a crystal is placed, one end of the crystal chamber 11 is provided with a connecting portion 12 for connecting with the cannula 4, the other end is provided with a head portion 13 for injecting the crystal into the eye by pushing, the head portion 13 has a port 131, the head portion 13 has a flat structure, a channel 132 from the crystal chamber 11 to the port 131 has a wide and narrow structure, an upper edge 1321 of a cross section of the channel 132 has a flat structure, and a lower edge 1322 has an arc structure. When the artificial lens 5 is pushed to the port 131 for movement, the cavity 132 is narrowed from wide to flat, the front loop 51 can be extruded above the lens optical area 52, the whole artificial lens 5 is folded from bottom to top, and the gesture can be better and more controllably finished for pushing injection.

In this embodiment, the crystal cavity 11 has a flat structure, a flat upper surface and a round lower surface, the bottom of the cavity 111 has an arc structure, the cavity 111 and the cavity channel 132 are smoothly connected, and the crystal cavity 11 is provided with an upper cover 112 capable of opening and closing the cavity 111. The invention can be used by directly placing the artificial lens 5 into the cavity 111 of the crystal cavity 11 and covering the upper cover 112, and has simple operation. One side of the upper cover 112 is hinged with the crystal cavity 11, and the other side is in snap connection with the crystal cavity 11. The upper cover 112 of the present invention is a flip cover structure, which is more convenient to use. The inner surface of the upper cover 112 is provided with a pressing block 113 which is convexly arranged and is used for contacting with the artificial lens 5 after being covered. After the cover is closed, the surface of the pressing block 113 is flush with the upper side of the inner surface of the cavity 111, so that the reliability of intraocular lens injection is ensured. The structure of the pressing block 113 is consistent with the opening structure of the cavity 111. After the cover is closed, the artificial lens 5 can be prevented from being polluted, and the use safety is ensured.

The front part of the port 131 in this embodiment is a bevel opening structure with a downward bevel, and the downward bevel is always maintained during the injection process. The internal through hole of the port 131 is of an oval structure.

The cross-sectional structure of the connecting portion 12 in this embodiment is identical to the lumen cross-sectional structure of the cannula 4. The connecting part 12 is in snap connection with the sleeve 4 after being inserted. Elastic clamping pieces 121 for connecting with the sleeve 4 are arranged on two sides of the connecting part 12. Specifically, the two sides of the connecting portion 12 are provided with a slot 122 that is longitudinally arranged, the elastic clamping piece 121 is arranged on the outer surface of the slot 122, the slot 122 provides a concave space for the elastic clamping piece 121, so that the connecting portion 12 can be conveniently inserted into the lumen of the sleeve 4, and the elastic clamping piece 121 can be sprung out to enter the connecting port 46 after moving to the connecting port 46, thereby realizing the snap connection. The connecting part 12 is internally provided with a channel for the push rod to enter the cavity 111 after penetrating and pushing the intraocular lens.

The surface of the push rod 3 in this embodiment is provided with a damping structure. The damping structure is a structural spring 31 which is matched with the inner wall of the sleeve 4 in an extrusion manner to generate damping. The surface of the push rod 3 is provided with an inner groove 33, and the structural spring 31 is arranged in the inner groove 33. The structural springs 31 are symmetrically disposed on both sides of the push rod 3. The outer surface of the structural spring 31 is provided with a one-way buckle 32, and the one-way buckle 32 protrudes out of the surface of the push rod 3. The rear end of the sleeve 4 is provided with a sleeve bayonet 41 which is matched with the unidirectional buckle 32 to buckle the initial positioning push rod. The unidirectional buckle 32 is buckled on the sleeve bayonet 41 to realize the initial positioning of the push rod 3 and the sleeve 4.

The push rod 3 in this embodiment is a flat structure, and includes a front section 34 for mounting the push head 2, a middle section 35 for supporting movement, and a rear section 36 for setting a damping mechanism, where the widths of the front section 34, the middle section 35, and the rear section 36 are sequentially increased. The structural spring 31 is arranged on the rear section 36. The end face of the rear section 36 of the push rod 3 is provided with a push plate 37 for pushing the push rod 3 forwards, and the push plate 37 is of a semicircular hook structure. When the push rod is used, the thumb is placed into the semicircular hook, the push rod 3 can be pushed forwards, the push rod 3 can be pulled backwards by force, and the use is more convenient. The surface of the push plate 37 that contacts the front side of the thumb is a planar structure.

The sleeve 42 of the present embodiment is a flat, upper flat, lower round configuration. The sleeve 2 of the present invention does not have a conventional circular structure and can reduce the use of materials. The sleeve 4 is internally provided with a supporting part 42 for supporting the middle section 35 to move along, and the supporting part 42 is provided with a through hole 43 for the middle end 35 to penetrate and be consistent with the structure of the middle section 35. When the push rod 3 is mounted, the push head 2 is mounted on the front section after the front section 34 passes through the through hole 43, and the middle section 35 is supported by the support portion 42 and can move forward and backward. The rear section 36 is a flat top and rounded bottom structure. The wall surface of the sleeve 4 is gradually narrowed from the rear end to the front end. The sleeve 4 provides greater damping to the structural spring 31, i.e. the damping of the structural spring 31 during the whole course of the bolus is variable. The rear end of the sleeve 4 is provided with a hand-held arm 44 which is matched with the push plate 37 to push the push rod 3 forwards, and the sleeve 4 is provided with a pull-back structure which is matched with the push plate 37 to pull the push rod 3 backwards. The pull-back structure is a small stop arm 45 protruding from the lower surface of the sleeve 4. The small catch arm 45 achieves front limit of the finger, and the push rod 3 can be pulled back through matching with the push plate 37. The small stop arm 45 is arranged in front of the hand-held arm 44. The hand-held arm 44 is longitudinally perpendicular to the sleeve 4 and is provided to protrude from the upper and lower surfaces of the sleeve 4. The index finger and the middle finger are in contact with the hand arms 44 at the upper and lower surfaces, respectively, so that the thumb can push the push rod 3 forward. The space for accommodating the middle finger is formed between the hand-held arm 44 and the small stop arm 42 on the lower surface, so that the front and back limiting of the middle finger is realized, and both forward pushing and backward pulling can be operated by one hand. The height of the lower surface of the protruding sleeve 4 of the small blocking arm 45 is smaller than the height of the lower surface of the protruding sleeve 4 of the hand-held arm 44.

In use, the introduction head 1 is mounted to the front end of the human cannula 4, the upper cover 112 is opened, the intraocular lens is placed in the cavity 111, after the viscoelastic is injected, the upper cover 112 is closed, and after the upper cover is closed, the push rod 3 is pushed to push the intraocular lens 5 forward. When the intraocular lens 5 is pushed to the port, the cavity 132 is narrowed from wide to flat on the lower circle, the front tab 51 is pressed to be above the lens optical area 52, the whole intraocular lens 5 is folded from bottom to top, and the posture can be better and more controllably completed for pushing injection. The hand-held arm 44 functions accordingly when the push rod 3 is pushed forward. When the push rod 3 needs to be pushed back in the preparation and the process of pushing, a user can pull the push rod 3 back through the push plate 37 with a semicircular hook structure, and the small catch arm 45 correspondingly acts at the moment, and the pulling back operation can be realized through one hand.

When in a storage and transportation state, the push rod 3 is stably restrained in one position by the cooperation of the unidirectional buckle 32 on the structural spring 31 and the sleeve bayonet 41; when the push rod 3 is used for pushing, the push rod 3 moves forwards, and the unidirectional buckle 32 on the structural spring 31 and the extrusion profile on the inner wall of the sleeve 4 are damped, so that a proper hand feeling is provided for pushing. Preferably, when the push rod 3 is pushed to the latter half, the inner wall of the sleeve 4 narrows, and the structural spring 31 provides more damping, that is, the damping of the structural spring 31 during the whole injection process is variable, thus providing more optimal damping.

According to the invention, through the arrangement of the damping structure, misoperation is prevented, and the push rod is pushed stably. The structure of the leading-in head ensures that the operation is simple, the use is convenient, and the artificial crystal leading-in is more controllable. The push rod pulling back structure is arranged, single-hand operation pulling back can be realized, the push rod pulling back structure is suitable for push rod pulling back operation in preparation or in the process of push injection, and the structure is simple and reasonable.

Example two

Referring to fig. 10, the present embodiment differs from the first embodiment in that: the rear portion of the port 131 in this embodiment is provided with a boss structure 133 for operative positioning. The boss structure 133 of the present invention has an obvious reminding function, and can perform a positioning function when a doctor operates, so that the eye is not inserted too deeply.

In this embodiment, the boss structure 133 is disposed at the rear portion of the port 131, and in the process of narrowing the head 13 from wide, the final portion is not gradually and excessively reached, but the boss structure 133 has a very good reminding effect when a doctor actually operates by means of the size mutation of the boss structure 133, and the small-diameter portion of the front end is inserted into the eye to operate, so that the rear diameter is obviously increased and the injection cannot be continued, thereby playing a positioning role when the doctor operates, and preventing the eye from being inserted too deeply.

The rest of the structure and function are as described with reference to the first embodiment.

Claims (10)

1. The utility model provides a non-preassembly intraocular lens injector, includes sleeve pipe (4), push rod (3), push rod (2), leading-in head (1) is installed in the front end of sleeve pipe (4), push rod (2) are installed in the front end of push rod (3), push rod (3) movably wear to locate in sleeve pipe (4) and enable push rod (2) get into leading-in head (1) and push away annotate intraocular lens (5), sleeve pipe (4), push rod (3), push rod (2), leading-in head (1) all are flat structure, its characterized in that: the damping structure is arranged on the surface of the push rod (3), the damping structure is a structural spring (31) which is in extrusion fit with the inner wall of the sleeve (4) to generate damping, a unidirectional buckle (32) is arranged on the outer surface of the structural spring (31), the unidirectional buckle (32) protrudes out of the surface of the push rod (3), and a sleeve bayonet (41) which is matched with the unidirectional buckle (32) to buckle and initially position the push rod (3) is arranged at the rear end of the sleeve (4).

2. The non-preloaded intraocular lens injector of claim 1, wherein: the leading-in head (1) is including placing crystal chamber (11) of intraocular lens (5), the one end of crystal chamber (11) is equipped with connecting portion (12) that are used for being connected with sleeve pipe (4), and its other end is equipped with head (13) that supply intraocular lens (5) to inject into the eye through the pushing away, head (13) have port (131), cavity (132) of head (13) from crystal chamber (11) toward port (131) are by wide narrowing structure, upper edge (1321) of the cross-section of cavity (132) are straight structure, and its lower edge (1322) are arc structure.

3. The non-preloaded intraocular lens injector of claim 2, wherein: the utility model discloses a crystal cavity (11), including crystal cavity (11), cavity (111) and cavity (132) are equipped with crystal cavity (11), crystal cavity (11) are equipped with crystal cavity (11) and are connected, crystal cavity (11) are equipped with the protrusion in the bottom of cavity (111) and be arc structure, crystal cavity (11) are connected with the one side of upper cover (112), and its opposite side is buckle with crystal cavity (11) and is connected, the internal surface of upper cover (112) is equipped with protrusion setting and is used for closing back and briquetting (113) of contact with intraocular lens (5), the structure of briquetting (113) is unanimous with the opening structure of cavity (111).

4. The non-preloaded intraocular lens injector of claim 2, wherein: the front part of the port (131) is a bevel opening structure with a downward bevel, and the rear part of the port (131) is provided with a boss structure (133) for operation positioning.

5. The non-preloaded intraocular lens injector of claim 2, wherein: the cross-sectional structure of the connecting part (12) is consistent with the cross-sectional structure of the lumen of the sleeve (4), the connecting part (12) is in buckling connection after being inserted with the sleeve (4), and elastic clamping pieces (121) used for being connected with the sleeve (4) are arranged on two sides of the connecting part (12).

6. The non-preloaded intraocular lens injector of claim 1, wherein: the rear end of push rod (3) is equipped with push pedal (37) that are used for pushing push rod (3) forward, the rear end of sleeve pipe (4) is equipped with handheld arm (44) that push rod (37) before pushing with push pedal (37) cooperation, be equipped with on sleeve pipe (4) with push pedal (37) cooperation pull back push rod (37) pull back structure, pull back structure is a protrusion setting and is located small fender arm (45) in sleeve pipe (4) lower surface and in the place ahead of handheld arm (44).

7. The non-preloaded intraocular lens injector of claim 6 wherein: the hand-held arm (44) is longitudinally perpendicular to the sleeve (4) and protrudes out of the upper surface and the lower surface of the sleeve (4), and the height of the lower surface of the small blocking arm (45) protruding out of the sleeve (4) is smaller than that of the hand-held arm (44) protruding out of the lower surface of the sleeve (4).

8. The non-preloaded intraocular lens injector of claim 7 wherein: the pushing plate (37) is of a semicircular hook structure, and the surface, which is contacted with the front side of the thumb, of the pushing plate (37) is of a plane structure.

9. The non-preloaded intraocular lens injector of claim 1, wherein: the structure springs (31) are symmetrically arranged on two sides of the push rod (3), inner grooves (33) are formed in the surface of the push rod (3), and the structure springs (31) are arranged in the inner grooves (33).

10. The non-preloaded intraocular lens injector of claim 9, wherein: the wall surface of the sleeve (4) is gradually narrowed from the rear end to the front end.