Medical instrument for eye surgery

Abstract

The invention provides a medical instrument for the eye surgery department, and relates to the technical field of medical instruments, according to the medical instrument for the eye surgery department, a first cavity and a second cavity can be used for high-frequency air inflation and / or air suction correspondingly, and then a diaphragm assembly is made to deform in a reciprocating mode in the axial direction of an inner pipe assembly; therefore, the inner tube assembly is driven to axially move in a reciprocating mode relative to the outer tube assembly, and the shearing effect on eye tissue can be achieved. During shearing, eye tissues and liquid can be guided through the inner tube assembly, so that the eye tissues and the liquid can be discharged in time. In addition, the elastic diaphragm is provided with a radial convex edge arranged between the cavity flow channels, so that the sealing performance of the sealing cavity is improved, and unstable driving force of the diaphragm assembly and medical accidents caused by leakage of gas in the sealing cavity can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an ocular surgical instrument. Background Art

[0002] Microsurgery usually uses optical magnification equipment and microsurgical instruments to perform delicate operations to cut or remove tissues in different parts. In minimally invasive ophthalmic surgery, it is usually necessary to cut and remove tissues such as the lens, cortex, broken nucleus, vitreous fluid, and detached retina. Suction is required while cutting, which leads to complex instrument function requirements, greater difficulty in production and manufacturing, and the risk of fluid leakage in the instrument, which is prone to medical accidents. Summary of the invention

[0003] The object of the present invention is to provide an ophthalmic surgical medical instrument to alleviate the technical problem of poor sealing performance of the ophthalmic surgical medical instrument.

[0004] In a first aspect, the present invention provides an ophthalmic surgical medical instrument, comprising: a cavity shell component, a diaphragm component, an inner tube component and an outer tube component;

[0005] The chamber shell assembly is provided with a sealing chamber, the diaphragm assembly is installed inside the sealing chamber, and the diaphragm assembly divides the sealing chamber into a first chamber and a second chamber, and the first chamber and the second chamber are spaced apart along the axial direction of the inner tube assembly;

[0006] The chamber housing assembly is provided with a first fluid channel and a second fluid channel, the first fluid channel is in fluid communication with the first chamber, and the second fluid channel is in fluid communication with the second chamber;

[0007] The outer tube assembly is installed on the cavity shell assembly, and the outer tube assembly is sleeved on the inner tube assembly.

[0008] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the cavity shell assembly comprises: a handle shell, a front cavity shell and a rear cavity shell, the handle shell, the front cavity shell and the rear cavity shell are connected in sequence, and the sealed cavity is formed between the front cavity shell and the rear cavity shell;

[0009] The first fluid channel extends from the rear cavity shell to the front cavity shell, and the second fluid channel is arranged in the rear cavity shell;

[0010] The outer tube assembly is installed between the handle housing and the front cavity shell, and the outer tube assembly is sleeved on the front cavity shell.

[0011] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the outer tube assembly comprises: a tube sleeve and an outer needle tube, the tube sleeve is connected to the outer needle tube;

[0012] The tube sleeve is sleeved on the front cavity shell, and the inner tube assembly passes through the tube sleeve and the outer needle tube in sequence.

[0013] In combination with the second possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein a first sealing ring is installed between the pipe sleeve and the inner pipe assembly.

[0014] In combination with the first possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the inner tube assembly comprises: an inner needle tube and a drive tube, the inner needle tube being coaxial with and connected to the drive tube;

[0015] The driving tube passes through the front cavity shell and the rear cavity shell, and the inner needle tube passes through the outer tube assembly.

[0016] In combination with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein a second sealing ring is installed between the drive tube and the front cavity shell, and a third sealing ring is installed between the drive tube and the rear cavity shell.

[0017] In combination with the fourth possible implementation manner of the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein a connecting tube is installed between the inner needle tube and the driving tube.

[0018] In combination with the first possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the handle shell comprises: a core shell and a rubber sleeve sleeved on the outside of the core shell, the core shell is connected to the front cavity shell, and the outer tube assembly passes through the core shell.

[0019] In combination with the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the diaphragm assembly includes: an elastic diaphragm and a support ring, the inner tube assembly is connected to the inner ring of the support ring, the elastic diaphragm is connected to the outer ring of the support ring, and the outer ring of the elastic diaphragm is connected to the chamber shell assembly, so that the elastic diaphragm is separated between the first chamber and the second chamber.

[0020] In combination with the eighth possible implementation of the first aspect, the present invention provides a ninth possible implementation of the first aspect, wherein the end surface of the support ring is provided with a boss and / or a slot hole adapted to the elastic diaphragm.

[0021] The embodiment of the present invention brings the following beneficial effects: a cavity shell assembly is provided with a sealed cavity, a diaphragm assembly is installed inside the sealed cavity, and the diaphragm assembly divides the sealed cavity into a first cavity and a second cavity, the first cavity and the second cavity are spaced along the axial direction of the inner tube assembly, the cavity shell assembly is provided with a first fluid channel and a second fluid channel, the first fluid channel is in fluid communication with the first cavity, and the second fluid channel is in fluid communication with the second cavity, the outer tube assembly is installed on the cavity shell assembly, and the outer tube assembly is sleeved on the inner tube assembly, by making the first cavity and the second cavity respectively perform high-frequency inflation and / or suction, the diaphragm assembly can be deformed reciprocatingly along the axial direction of the inner tube assembly, and the inner tube assembly is driven to reciprocate axially relative to the outer tube assembly, thereby forming a shearing effect on the eye tissue. In addition, while shearing, the eye tissue and liquid can be guided through the inner tube assembly, so that they can be discharged in time. On this basis, the eye surgical medical instrument improves the sealing performance of the sealed cavity, and can avoid the leakage of gas in the sealed cavity causing unstable driving force of the diaphragm assembly and medical accidents.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 An exploded view of an ocular surgical medical instrument provided by an embodiment of the present invention;

[0025] Figure 2 A cross-sectional view of an ophthalmic surgical instrument provided by an embodiment of the present invention Figure 1 ;

[0026] Figure 3 A cross-sectional view of an ophthalmic surgical instrument provided by an embodiment of the present invention Figure 2 ;

[0027] Figure 4 A schematic diagram of a diaphragm assembly and an inner tube assembly of an ophthalmic surgical medical instrument provided by an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of a support ring of an ophthalmic surgical medical instrument provided in an embodiment of the present invention Figure 1 ;

[0029] Figure 6Schematic diagram of a support ring of an ophthalmic surgical medical instrument provided in an embodiment of the present invention Figure 2 ;

[0030] Figure 7 A cross-sectional view of an outer tube assembly of an ophthalmic surgical medical instrument provided by an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of a front chamber shell of an ophthalmic surgical medical instrument provided by an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of a rear cavity shell of an ophthalmic surgical medical instrument provided in an embodiment of the present invention.

[0033] Icons: 010 - sealed chamber; 011 - first chamber; 012 - second chamber; 100 - chamber shell assembly; 101 - first fluid channel; 102 - second fluid channel; 103 - suction interface; 110 - handle shell; 111 - core shell; 112 - rubber sleeve; 120 - front chamber shell; 121 - end tube; 130 - rear chamber shell; 200 - diaphragm assembly; 210 - elastic diaphragm; 211 - through hole; 220 - support ring; 221 - boss; 222 - slot; 300 - inner tube assembly; 301 - first side incision; 310 - inner needle tube; 320 - drive tube; 330 - second sealing ring; 340 - third sealing ring; 350 - connecting tube; 400 - outer tube assembly; 410 - sleeve; 420 - outer needle tube; 421 - second side incision; 430 - first sealing ring. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the ophthalmic surgical medical instrument provided by the embodiment of the present invention includes: a cavity shell assembly 100, a diaphragm assembly 200, an inner tube assembly 300 and an outer tube assembly 400; the cavity shell assembly 100 is provided with a sealed cavity 010, the diaphragm assembly 200 is installed inside the sealed cavity 010, and the diaphragm assembly 200 separates the sealed cavity 010 into a first chamber 011 and a second chamber 012, and the first chamber 011 and the second chamber 012 are spaced along the axial direction of the inner tube assembly 300; the cavity shell assembly 100 is provided with a first fluid channel 101 and a second fluid channel 102, the first fluid channel 101 is fluidically connected to the first chamber 011, and the second fluid channel 102 is fluidically connected to the second chamber 012; the outer tube assembly 400 is installed on the cavity shell assembly 100, and the outer tube assembly 400 is sleeved on the inner tube assembly 300.

[0038] When the ophthalmic surgical medical instrument is in use, the first fluid channel 101 and the second fluid channel 102 are connected to the gas suction device respectively, and one of the first fluid channel 101 and the second fluid channel 102 is inflated and the other is exhausted, and the high-frequency switching is repeated, so that the diaphragm assembly 200 can float 6000 to 10000 times / minute along the axial direction of the inner tube assembly 300, and the inner tube assembly 300 can be driven to reciprocate and move with high frequency relative to the outer tube assembly 400, and shearing is formed by the inner tube assembly 300 and the outer tube assembly 400, so that the vitreous body, membrane, lens and other tissues of the eye can be cut. In addition, the cut tissue and liquid can be guided out through the inner tube assembly 300, and the inner tube assembly 300 can be connected through an external suction device to accelerate the discharge of tissue and liquid. In the ophthalmic surgical medical instrument, the first chamber and the second chamber are tightly sealed, which can avoid the leakage of gas in the sealed cavity 010, causing unstable driving force of the diaphragm assembly 200 and medical accidents.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, in an embodiment of the present invention, the cavity shell assembly 100 includes: a handle shell 110, a front cavity shell 120 and a rear cavity shell 130, the handle shell 110, the front cavity shell 120 and the rear cavity shell 130 are connected in sequence, and a sealed cavity 010 is formed between the front cavity shell 120 and the rear cavity shell 130; the first fluid channel 101 extends from the rear cavity shell 130 to the front cavity shell 120, and the second fluid channel 102 is arranged in the rear cavity shell 130; the outer tube assembly 400 is installed between the handle shell 110 and the front cavity shell 120, and the outer tube assembly 400 is sleeved on the front cavity shell 120.

[0040] Specifically, the handle housing 110, the front cavity housing 120 and the rear cavity housing 130 can be connected in sequence by threading or bonding, so as to improve the connection stability and the sealing of the connection. The handle housing 110 and the front cavity housing 120 jointly clamp the limit outer tube assembly 400, and the outer tube assembly 400 is sleeved on the end tube 121 at the front end of the front cavity housing 120, so as to ensure that the outer tube assembly 400 and the front cavity housing 120 are tightly sealed at the joint, improve the sealing performance of the equipment, and prevent the gas in the sealed cavity 010 from leaking to the inside of the outer tube assembly 400. In addition, the proximal end of the rear cavity housing 130 is provided with a suction interface 103, and the suction interface 103 is in fluid communication with the inner tube assembly 300, and the suction device is connected to the suction interface 103, so as to suction the sheared eye tissue and liquid and accelerate the discharge along the inner tube assembly 300.

[0041] Furthermore, the outer tube assembly 400 includes: a tube sleeve 410 and an outer needle tube 420, the tube sleeve 410 is connected to the outer needle tube 420; the tube sleeve 410 is sleeved on the front cavity shell 120, and the inner tube assembly 300 passes through the tube sleeve 410 and the outer needle tube 420 in sequence.

[0042] Specifically, the tube sleeve 410 is made of plastic material, such as PC, PP, PSU, etc. The tube sleeve 410 is sleeved on the terminal tube 121, and the tube sleeve 410 and the terminal tube 121 are interference fit, so as to ensure the sealing of the joint between the tube sleeve 410 and the terminal tube 121. The outer needle tube 420 is configured of stainless steel, titanium alloy or other metal materials, and the end of the outer needle tube 420 is provided with a second side incision 421, and the inner tube assembly 300 can be retracted relative to the outer needle tube 420, so that the eye tissue entering from the second side incision 421 is sheared.

[0043] like Figure 3 and Figure 7 As shown, a first sealing ring 430 is installed between the pipe sleeve 410 and the inner pipe assembly 300. The first sealing ring 430 can be connected to the pipe sleeve 410 in a split manner, or the first sealing ring 430 and the inner pipe assembly 300 can be integrally formed. The first sealing ring 430 can be made of fluororubber, nitrile rubber, silicone rubber or TPE, and the first sealing ring 430 is tightly sleeved on the inner pipe assembly 300, thereby improving the sealing performance of the inner cavity of the pipe sleeve 410.

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the inner tube assembly 300 includes: an inner needle tube 310 and a drive tube 320 , the inner needle tube 310 is coaxial with and connected to the drive tube 320 ; the drive tube 320 passes through the front cavity shell 120 and the rear cavity shell 130 , and the inner needle tube 310 passes through the outer tube assembly 400 .

[0045] Specifically, the driving tube 320 can be made of stainless steel or other metal materials, and the inner needle tube 310 can be made of stainless steel, titanium alloy or other metal materials. The outer diameter of the driving tube 320 ranges from 1.0mm to 1.5mm, and the outer diameter of the inner needle tube 310 is 0.3mm to 0.7mm, preferably 0.3mm to 0.5mm.

[0046] Furthermore, a second sealing ring 330 is installed between the driving tube 320 and the front chamber shell 120, and a third sealing ring 340 is installed between the driving tube 320 and the rear chamber shell 130. The second sealing ring 330 and the third sealing ring 340 are respectively sleeved on the driving tube 320, thereby improving the sealing of the first chamber 011 and the second chamber 012, thereby preventing the gas in the sealed chamber 010 from leaking out.

[0047] In addition, when the diameter difference between the inner needle tube 310 and the driving tube 320 is large, a connecting tube 350 can be installed between the inner needle tube 310 and the driving tube 320. The connecting tube 350 can be made of metal materials such as stainless steel tubes to connect the inner needle tube 310 and the driving tube 320. The connecting tube 350 can also be made of plastic materials such as polyimide, and the outer diameter of the connecting tube 350 is 0.4mm to 1.0mm, which helps to adapt to the radial tolerance change of the inner needle tube 310 relative to the driving tube 320, thereby ensuring smooth telescopic movement of the outer needle tube 420 relative to the inner needle tube 310.

[0048] like Figure 2 and Figure 3 As shown, the handle housing 110 includes: a core shell 111 and a rubber sleeve 112 sleeved on the outside of the core shell 111 , the core shell 111 is connected to the front cavity shell 120 , and the outer tube assembly 400 passes through the core shell 111 .

[0049] Specifically, the core shell 111 is configured with a harder material such as ABS, PS, PA, PE, etc., which can be convenient for doctors to hold, and the rubber sleeve 112 is configured with a softer material such as TPE, silicone rubber, fluororubber, etc. The use of soft materials can reduce the vibration generated during the movement of the handle, thereby making the grip more stable. In addition, the outer side of the rubber sleeve 112 can be processed with a striped structure to increase the friction of the doctor's grip.

[0050] like Figure 1 , Figure 2 , Figure 3, Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the diaphragm assembly 200 includes: an elastic diaphragm 210 and a support ring 220, the inner tube assembly 300 is connected to the inner ring of the support ring 220, the elastic diaphragm 210 is connected to the outer ring of the support ring 220, and the outer ring of the elastic diaphragm 210 is connected to the chamber shell assembly 100, so that the elastic diaphragm 210 is separated between the first chamber 011 and the second chamber 012. Among them, the support ring 220 is usually made of medical plastics, such as PSU (polysulfone), PC (polycarbonate), ABS, PS, etc., and can also be made of light metal materials, such as aluminum alloy, titanium alloy, etc. The elastic diaphragm 210 is made of soft elastic material, such as TPE, silicone rubber, fluororubber, nitrile rubber, etc. Under the action of the pressure difference change between the first chamber 011 and the second chamber 012, the elastic diaphragm 210 is elastically deformed, thereby causing the support ring 220 and the inner tube assembly 300 to move back and forth along the axial direction together. A first side incision 301 is provided at the distal end of the inner tube assembly 300. When the inner tube assembly 300 reciprocates and expands relative to the outer tube assembly 400, the first side incision 301 and the second side incision 421 are overlapped and offset reciprocatingly changed, thereby shearing the eye tissue that passes through the first side incision 301 and the second side incision 421 and enters the inner tube assembly 300.

[0051] Specifically, the elastic diaphragm 210 is provided with a convex edge protruding radially, and the convex edge is provided with a through hole 211. The front cavity shell 120 and the rear cavity shell 130 are respectively provided with flow channels. The flow channel provided in the front cavity shell 120, the through hole 211, and the flow channel provided in the rear cavity shell 130 together constitute the first fluid channel 101, which on the one hand improves the assembly compactness of the diaphragm assembly 200 and the cavity shell assembly 100, and on the other hand improves the sealing performance of the connection between the diaphragm assembly 200 and the cavity shell assembly 100.

[0052] Furthermore, the elastic membrane 210 is wrapped around the outside of the support ring 220, and the elastic membrane 210 has a first membrane wall at the distal end of the support ring 220, and the elastic membrane 210 has a second membrane wall at the proximal end of the support ring 220, and the thickness of the first membrane wall is less than the thickness of the second membrane wall, thereby reducing the vibration and noise generated by the high-frequency reciprocating motion of the support ring 220. In addition, the first membrane wall at the distal end is thinner and has a greater hardness, which reduces the tolerance effect of the elastic deformation of the first membrane wall, and the support ring 220 and the inner tube assembly 300 stop at the distal end more accurately.

[0053] It should be noted that the elastic diaphragm 210 is pressed between the front cavity shell 120 and the rear cavity shell 130, and can partially separate the first chamber 011 and the second chamber 012, and has a sealing effect, which can prevent leakage of the first fluid channel 101 composed of the flow channel arranged in the front cavity shell 120, the through hole 211, and the flow channel arranged in the rear cavity shell 130.

[0054] In addition, the end surface of the support ring 220 is provided with a boss 221 and / or a slot 222 adapted to the elastic diaphragm 210. There can be a plurality of bosses 221 and slots 222, respectively, and the cross-sections of the bosses 221 and slots 222 can be configured into a circular or elliptical structure, etc. The elastic diaphragm 210 is sleeved on the support ring 220, thereby improving the stability of the connection between the elastic diaphragm 210 and the support ring 220.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ophthalmic surgical instrument, characterized in that: include: A chamber housing assembly (100), a diaphragm assembly (200), an inner tube assembly (300) and an outer tube assembly (400); The chamber housing assembly (100) is provided with a sealed chamber (010), the diaphragm assembly (200) is installed inside the sealed chamber (010), and the diaphragm assembly (200) divides the sealed chamber (010) into a first chamber (011) and a second chamber (012), and the first chamber (011) and the second chamber (012) are spaced apart along the axial direction of the inner tube assembly (300); The chamber housing assembly (100) is provided with a first fluid channel (101) and a second fluid channel (102), wherein the first fluid channel (101) is in fluid communication with the first chamber (011), and the second fluid channel (102) is in fluid communication with the second chamber (012); The outer tube assembly (400) is installed on the chamber shell assembly (100), and the outer tube assembly (400) is sleeved on the inner tube assembly (300).

2. The ophthalmic surgical instrument according to claim 1, characterized in that: The chamber shell assembly (100) comprises: a handle shell (110), a front chamber shell (120) and a rear chamber shell (130); the handle shell (110), the front chamber shell (120) and the rear chamber shell (130) are connected in sequence, and the sealed chamber (010) is formed between the front chamber shell (120) and the rear chamber shell (130); The first fluid channel (101) extends from the rear cavity shell (130) to the front cavity shell (120), and the second fluid channel (102) is arranged in the rear cavity shell (130); The outer tube assembly (400) is installed between the handle housing (110) and the front cavity housing (120), and the outer tube assembly (400) is sleeved on the front cavity housing (120).

3. The ophthalmic surgical instrument according to claim 2, characterized in that: The outer tube assembly (400) comprises: a tube sleeve (410) and an outer needle tube (420), wherein the tube sleeve (410) is connected to the outer needle tube (420); The tube sleeve (410) is sleeved on the front chamber shell (120), and the inner tube assembly (300) passes through the tube sleeve (410) and the outer needle tube (420) in sequence.

4. The ophthalmic surgical instrument according to claim 3, characterized in that: A first sealing ring (430) is installed between the pipe sleeve (410) and the inner pipe assembly (300).

5. The ophthalmic surgical instrument according to claim 2, characterized in that: The inner tube assembly (300) comprises: an inner needle tube (310) and a drive tube (320), wherein the inner needle tube (310) and the drive tube (320) are coaxial and connected; The driving tube (320) passes through the front cavity housing (120) and the rear cavity housing (130), and the inner needle tube (310) passes through the outer tube assembly (400).

6. The ophthalmic surgical instrument according to claim 5, characterized in that: A second sealing ring (330) is installed between the driving tube (320) and the front chamber shell (120), and a third sealing ring (340) is installed between the driving tube (320) and the rear chamber shell (130).

7. The ophthalmic surgical instrument according to claim 5, characterized in that: A connecting tube (350) is installed between the inner needle tube (310) and the driving tube (320).

8. The ophthalmic surgical instrument according to claim 2, characterized in that: The handle housing (110) comprises: a core shell (111) and a rubber sleeve (112) sleeved on the outside of the core shell (111); the core shell (111) is connected to the front cavity shell (120); and the outer tube assembly (400) passes through the core shell (111).

9. The ophthalmic surgical instrument according to claim 1, characterized in that: The diaphragm assembly (200) comprises: an elastic diaphragm (210) and a support ring (220); the inner tube assembly (300) is connected to the inner ring of the support ring (220); the elastic diaphragm (210) is connected to the outer ring of the support ring (220); and the outer ring of the elastic diaphragm (210) is connected to the chamber shell assembly (100), so that the elastic diaphragm (210) is separated between the first chamber (011) and the second chamber (012).

10. The ophthalmic surgical instrument according to claim 9, characterized in that: The end surface of the support ring (220) is provided with a boss (221) and / or a slot (222) adapted to the elastic diaphragm (210), and the elastic diaphragm (210) is coated on the outside of the support ring (220).

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