Glass cutting head device for ophthalmologic operation

Abstract

The invention discloses a vitrectomy head device for ophthalmologic operation, comprising: a seat body including an outer shell and an inner shell, the outer shell having a wall portion, the wall portion forming an inner cavity, the inner cavity being internally provided with a first extension tube connected with the wall portion, the inner shell being sleeved in the first extension tube, the inner shell being suitable for being connected with a driving device; the cutter head comprises an outer cutter tube and an inner cutter tube, the outer cutter tube is arranged outside the inner cutter tube in a sleeving mode, the outer cutter tube is fixed to one end of the outer shell, the inner cutter tube penetrates through the wall part to be connected with the inner shell, windows are formed in the side walls of the inner cutter tube and the outer cutter tube, and the inner cutter tube and the outer cutter tube are connected through the windows. The inner knife tube can be driven by the inner shell to move in the axial direction of the outer knife tube. The cover body is connected to the other end of the shell, the cover body is provided with a second extension pipe, the first extension pipe is sleeved with the second extension pipe, and the second extension pipe abuts against the outer side wall of the first extension pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a vitrectomy head device for ophthalmic surgery. Background Art

[0002] The vitrectomy head device is a vitrectomy device for ophthalmic surgery. The existing reciprocating vitrectomy head can remove the diseased vitreous body through the relative movement of the inner and outer blade tubes of the blade head, and can extract the removed material. Generally, the outer blade tube is fixed to the housing of the vitrectomy head device, and the inner blade tube is connected to the driving device. The driving device drives the inner blade tube to move back and forth at high speed along the axial direction in the outer blade tube. The vitreous removed material enters the inner blade tube and is discharged from the vitrectomy head under the action of the suction airflow.

[0003] The existing vitrectomy head device has problems such as poor coaxiality between the inner blade tube and the driving device, and poor linearity of the reciprocating movement of the inner blade tube, thereby affecting the accuracy of the surgery. Summary of the invention

[0004] The purpose of the present invention is to provide a new technical solution for a vitrectomy head device for ophthalmic surgery.

[0005] According to the present invention, a vitrectomy head device for ophthalmic surgery is provided, comprising: The seat body comprises an outer shell and an inner shell, wherein the outer shell has a wall portion, the wall portion forms an inner cavity, a first extension tube connected to the wall portion is arranged in the inner cavity, the inner shell is sleeved in the first extension tube, and the inner shell is suitable for connecting with the driving device; The cutter head comprises an outer cutter tube and an inner cutter tube, wherein the outer cutter tube is sleeved outside the inner cutter tube, the outer cutter tube is fixed to one end of the outer shell, the inner cutter tube passes through the wall portion and is connected to the inner shell, the inner cutter tube and the side walls of the outer cutter tube are provided with windows, and the inner cutter tube can move along the axial direction of the outer cutter tube under the drive of the inner shell, so that the window of the inner cutter tube and the window of the outer cutter tube form a shearing effect; The cover body is connected to the other end of the shell, and the cover body is provided with a second extension tube, the second extension tube is sleeved outside the first extension tube, and the second extension tube abuts against the outer side wall of the first extension tube.

[0006] Optionally, the inner shell is provided with a first channel, and the inner knife tube passes through the wall portion and is connected to the first channel.

[0007] Optionally, the inner shell is provided with a second channel, the second channel is suitable for being connected to a suction device, and the second extension tube has an escape opening for avoiding the second channel.

[0008] Optionally, the cover body includes a first cover body and a second cover body, the first cover body and the second cover body are connected, the first cover body is connected to the second extension tube, and the second cover body is connected to the other end of the shell.

[0009] Optionally, the first cover body is snap-connected with the second cover body.

[0010] Optionally, the driving device includes a plunger telescopic structure and a flexible member, the plunger telescopic structure includes a column and a piston part connected to the column, the column is connected to the inner shell, the outer periphery of the piston part is connected to the flexible member, and the flexible member is clamped between the first cover body and the second cover body.

[0011] Optionally, the second cover body is provided with a receiving cavity having an open end, the first cover body is located in the receiving cavity, and the outer periphery of the flexible member is clamped and fixed between the first cover body and the second cover body.

[0012] Optionally, a first annular groove is formed at the bottom of the accommodating cavity, the first cover body has an annular flange, a second annular groove is formed between the annular flange and the side wall of the accommodating cavity, and the flexible part includes a vibrating part and fixed parts located on both sides of the outer periphery of the vibrating part, and the two fixed parts are respectively located in the first annular groove and the second annular groove.

[0013] Optionally, an annular groove is provided on the outer circumferential surface of the piston portion, and the flexible member is connected in the annular groove.

[0014] Optionally, the first cover body is provided with a sliding cavity, the sliding cavity is communicated with the accommodating cavity, the column is located in the sliding cavity and passes through one end of the sliding cavity, the column is formed with a radial protrusion, and the radial protrusion is slidably matched with the sliding cavity.

[0015] Optionally, a second through hole is provided in the middle of the second cover body, and first through holes are provided at the edges of the first cover body and the second cover body, the first through hole and the second through hole are both connected to the accommodating cavity, and the outlet of the first through hole and the outlet of the second through hole are respectively located on both sides of the thickness direction of the flexible part.

[0016] The present invention arranges a first extension tube in the inner cavity of the shell, the end of the shell is connected to the cover body, and the cover body is provided with a second extension tube. By arranging the second extension tube outside the first extension tube and the second extension tube abutting against the outer wall of the first extension tube, it is beneficial to improve the coaxiality of the inner knife tube and the driving device, and prevent radial vibration of the glass cutting head during rapid axial movement.

[0017] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 It is a cross-sectional view of the sleeve structure of the vitrectomy head device for ophthalmic surgery according to an embodiment of the present invention.

[0020] Figure 2 It is a cross-sectional view of the housing sleeve structure of the vitrectomy head device for ophthalmic surgery according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the assembly of the cover of the vitrectomy head device for ophthalmic surgery according to an embodiment of the present invention.

[0022] Figure 4 It is a partial cross-sectional view of a vitrectomy head device for ophthalmic surgery according to an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the inner shell and inner blade tube structure of the vitrectomy head device for ophthalmic surgery according to an embodiment of the present invention.

[0024] Reference numerals Cutting head 10; Outer knife tube 11; inner knife tube 12; window 13; base body 20; Outer shell 21; inner shell 22; groove portion 23; First extension tube 210; first channel 221; second channel 222; Plunger telescopic structure 30; Piston portion 31; column 32; flexible member 33; sealing member 34; Radial protrusion 321; sliding seal 322; Vibrating portion 331; fixing portion 332; Cover body 40; Through hole 41; first cover body 42; second cover body 43; sealing element 44; First chamber 402; second chamber 403; Buckle 421; Card slot 431; accommodating cavity 432; first annular groove 433; Second extension pipe 422; avoidance opening 4221; Annular flange 423; second annular groove 424. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0026] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0027] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0028] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0029] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] The vitrectomy head device for ophthalmic surgery according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 5 As shown, according to one embodiment of the present invention, a vitrectomy head device for ophthalmic surgery is provided. The vitrectomy head device includes a base body 20, a blade head 10 and a cover body 40.

[0032] The seat body 20 includes an outer shell 21 and an inner shell 22. The outer shell 21 has a wall portion, which forms an inner cavity. A first extension tube 210 connected to the wall portion is arranged in the inner cavity. The inner shell 22 is sleeved in the first extension tube 210 and is suitable for connecting to a driving device.

[0033] It should be noted that the outer shell 21 of the seat body 20 includes a hand-held part, and the inner shell 22 can reciprocate relative to the outer shell 21 under the drive of the driving device. The inner shell 22 is arranged in the first extension tube 210, and the first extension tube 210 can provide limiting and guiding functions for the reciprocating movement of the inner shell 22.

[0034] The cutter head 10 includes an outer cutter tube 11 and an inner cutter tube 12. The outer cutter tube 11 is sleeved outside the inner cutter tube 12. The outer cutter tube 11 is fixed to one end of the outer shell 21. The inner cutter tube 12 passes through the wall portion and is connected to the inner shell 22. Windows 13 are provided on the side walls of the inner cutter tube 12 and the outer cutter tube 11. The inner cutter tube 12 can move axially along the outer cutter tube 11 under the drive of the inner shell 22, so that the window 13 of the inner cutter tube 12 and the window 13 of the outer cutter tube 11 form a shearing effect.

[0035] The inner blade tube 12 and the outer blade tube 11 are both hollow components, and the inner blade tube 12 is coaxially arranged with the outer blade tube 11 and movably disposed in the outer blade tube 11. The window 13 extends radially, and the vitrectomy fluid is sucked into the window 13. The driving device drives the inner blade tube 12 to move, and the inner blade tube 12 cooperates with the window 13 on the outer blade tube 11 to cut the vitreous body, and the cut vitreous body is sucked out through the inner blade tube 12.

[0036] The cover body 40 is connected to the other end of the housing 21 to close the inner cavity. The cover body 40 is provided with a second extension tube 422, which is sleeved outside the first extension tube 210, and the second extension tube 422 abuts against the outer side wall of the first extension tube 210. The second extension tube 422 is coaxially arranged with the first extension tube 210. The second extension tube 422 is sleeved and connected with the first extension tube 210, which further stabilizes the connection firmness between the cover body 40 and the base body 20.

[0037] Combination Figure 2 As shown, the cover body 40 is provided with a second extension tube 422, the opening direction of the second extension tube 422 is opposite to the opening direction of the first extension tube 210, the opening end of the second extension tube 422 is sleeved outside the opening end of the first extension tube 210, and the inner wall of the second extension tube 422 is against the outer wall of the first extension tube 210.

[0038] Optionally, the first extension tube 210 is disposed in the inner cavity of the outer shell 21 and fixedly connected to the wall of the outer shell 21 .

[0039] Optionally, the first extension tube 210 is disposed in the inner cavity of the shell 21 and is integrally formed with the shell 21 , which can simplify the assembly process of the vitrectomy head.

[0040] It should be noted that both the inner blade tube 12 and the outer blade tube 11 are hollow components, and the inner blade tube 12 is coaxially arranged with the outer blade tube 11 and movably disposed in the outer blade tube 11. The inner blade tube 12 is connected to the inner shell 22, and the inner shell 22 is connected to the driving device, that is, the driving device can drive the inner blade tube 12 to move. The window 13 extends radially, and the vitrectomy fluid is sucked into the window 13. The driving device drives the inner blade tube 12 to move, and the inner blade tube 12 cooperates with the window 13 on the outer blade tube 11 to cut the vitreous body. The cut vitreous body is sucked away from the vitrectomy head through the inner blade tube 12.

[0041] In the vitreous cutting head device of the present invention, a first extension tube 210 is arranged in the inner cavity of the outer shell 21 of the base body 20, and the end of the outer shell 21 is connected to the cover body 40. The cover body 40 is provided with a second extension tube 422. By sleeved the second extension tube 422 outside the first extension tube 210, and the second extension tube 422 is abutted against the outer wall of the first extension tube 210, it is beneficial to improve the coaxiality of the inner knife tube 12 and the driving device, so that the linearity of the reciprocating movement of the inner knife tube is better, and the radial shaking of the inner knife tube 12 during the rapid axial movement of the vitreous cutting head is prevented.

[0042] In one embodiment of the present invention, Figure 1 As shown, the inner shell 22 is provided with a first channel 221 , and the inner knife tube 12 passes through the wall portion and is connected to the first channel 221 .

[0043] Optionally, combined Figure 5 As shown, the inner shell 22 is provided with a groove portion 23 connected to the first channel 221, and the outer wall of the inner blade tube 12 is at least partially exposed to the groove portion 23, and the groove portion 23 is used for injecting sealant. By providing the groove portion 23, the injection amount of sealant between the outer wall of the inner blade tube 12 and the inner wall of the first channel 221 of the inner shell 22 is increased, thereby effectively enhancing the connection firmness between the inner blade tube 12 and the inner shell 22.

[0044] Compared with the connection method of using interference fit between the first shell 20 and the inner probe 13, or the connection method of inserting the inner probe 13 into the first shell 20 and forming a thin layer of glue on the contact surface of the inner probe 13 and the first shell 20, a groove portion 23 is provided at the entrance of the inner shell 22 communicating with the first channel 221, so that the outer wall of the inner knife tube 12 is at least partially exposed to the groove portion 23, and more sealant can be poured into the groove portion 23, so that a more durable and more secure connection between the inner knife tube 12 and the inner shell 22 can be achieved. This setting makes the connection between the inner knife tube 12 and the inner shell 22 more secure, and further ensures that the inner knife tube 12 can have better linearity and higher coaxiality during the axial reciprocating motion.

[0045] Optionally, based on the arrangement that the outer knife tube 11 is sleeved outside the inner knife tube 12, the inner knife tube 12 is connected to the first channel 221 of the inner shell 22, the inner shell 22 is sleeved inside the first extension tube 210, and the second extension tube 422 is sleeved outside the first extension tube 210, the central axes of the outer knife tube 11, the inner knife tube 12, the first channel 221, the inside of the first extension tube 210, and the second extension tube 422 are on the same straight line. In other words, the outer knife tube 11 and the inner knife tube 12 are coaxially arranged, and the first channel 221, the inside of the first extension tube 210, and the second extension tube 422 are coaxially arranged. The present invention is conducive to ensuring that the inner knife tube 12 performs linear reciprocating motion through the above-mentioned sleeve structure of the inner shell 22 and the outer shell 21 of the vitreous cutting head device, so that the vitreous cutting head device has higher control accuracy.

[0046] In one embodiment of the present invention, Figure 1 and Figure 3 As shown, the inner shell 22 is provided with a second channel 222 , the second channel 222 is suitable for connecting with a suction device, and the second extension tube 422 has an escape opening 4221 for evading the second channel 222 .

[0047] The second channel 222 of the present invention is a channel for sucking out surgical resections, so that the air flow channel used for sucking surgical resections and the air flow channel for driving the inner knife tube 12 to move are in different spatial positions, which is beneficial to reducing the difficulty of sealing the air flow channel and simplifying the complexity of the sealing structure, which is beneficial to simplifying the internal structure of the vitrectomy head device and facilitating improving the accuracy of each airflow control.

[0048] The present invention does not limit the specific position, shape, and size of the avoidance opening 4221. The position, shape, and size of the avoidance opening 4221 on the second channel 222 or the main structure of the cover body 40 are set according to the different angles at which the second channel 222 deviates from the central axis of the first channel 221.

[0049] In one embodiment of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, the cover 40 includes a first cover 42 and a second cover 43, wherein the second cover 43 and the first cover 42 are detachably connected to facilitate installation of the drive device. The second extension tube 422 is connected to the first cover 42, and the second cover 43 is connected to the other end of the housing 21 away from the outer blade tube 11.

[0050] In one embodiment of the present invention, the second cover body 43 is provided with a receiving cavity 432, the receiving cavity 432 has an open end, and the first cover body 42 is located in the receiving cavity 432. To facilitate disassembly and assembly, the first cover body 42 is snap-fitted with the second cover body 43, and a sealing element 44 is provided between the outer circumference of the first cover body 42 and the gap between the second cover body 43 to close the installation space of the drive device.

[0051] Optionally, at least two buckles 421 are provided at intervals along the circumferential direction on the outer side of the first cover body 42 , and a clamping groove 431 is provided on the second cover body 43 at a position corresponding to the buckle 421 , and the buckle 421 is clamped with the clamping groove 431 .

[0052] Optionally, a continuous flange is provided on the outer wall of the first cover body 42 along the circumferential direction, and a continuous groove is provided on the inner wall of the second cover body 43 , and the continuous flange cooperates with the continuous groove to achieve the snap connection between the first cover body 42 and the second cover body 43 .

[0053] In one embodiment of the present invention, Figure 4As shown, the driving device includes a plunger telescopic structure 30 and a flexible member 33. The plunger telescopic structure 30 includes a column 32 and a piston portion 31 connected to the column 32. The far end of the column 32 away from the piston portion 31 is connected to the inner shell 22. The outer periphery of the piston portion 31 is connected to the flexible member 33. The outer periphery of the flexible member 33 away from the end of the piston portion 31 is clamped between the first cover body 42 and the second cover body 43.

[0054] It should be noted that at least a portion of the flexible member 33 is elastic, so that the flexible member 33 can support the piston portion 31 to reciprocate in the accommodating chamber 432 .

[0055] Combination Figure 3 and Figure 4 As shown, the first cover 42 is provided with a through hole 41, the piston portion 31 and the flexible member 33 of the plunger telescopic structure 30 are placed in the accommodating cavity 432, the column 32 passes through the through hole 41, and the distal end of the column 32 is connected to the inner shell 22. A sealing member 34 is provided on the peripheral side of the column 32 near one end of the piston portion 31, and the sealing member 34 separates the accommodating cavity 432 from the through hole 41.

[0056] Thus, a first chamber 402 is formed between the first cover 42, the flexible member 33 and the piston portion 31, and a second chamber 403 is formed between the second cover 43, the flexible member 33 and the piston portion 31. The first chamber 402 and the second chamber 403 are respectively connected to the gas supply device, and the sealing member 34 has a sealing effect on the gas in the first chamber 402 to prevent the gas in the first chamber 402 from leaking through the through hole 41.

[0057] In one embodiment of the present invention, the sealing method of the sealing member 34 is sliding sealing, and the sealing member 34 is slidably connected to the inner wall of the column 32 or the first cover body 42 .

[0058] Optionally, the inner wall of the first cover body 42 is provided with a groove body, and the seal 34 is placed in the groove body, and the seal 34 abuts against the outer circumference of the column 32. In the present invention, the seal 34 is fixed to the cover body 40, and is in sliding contact with the column 32, so that the volume of the accommodating cavity 432 remains unchanged, which is conducive to accurately controlling the air pressure of the first chamber 402 and the second chamber 403, thereby accurately controlling the reciprocating movement of the piston part 31, that is, making the control of the reciprocating movement of the inner knife tube 12 more accurate.

[0059] In one embodiment of the present invention, the edge of the first cover 42 and the edge of the second cover 43 are provided with a first through hole, the middle of the second cover 43 is provided with a second through hole, the outlet of the first through hole and the outlet of the second through hole are respectively located on both sides of the thickness direction of the flexible member 33, and the inlet of the first through hole and the second through hole are suitable for communicating with the gas supply device. The gas supply device provides gas to the first chamber 402 and the second chamber 403 through the first through hole and the second through hole respectively.

[0060] In one embodiment of the present invention, the flexible member 33 is swingable, so that the piston portion 31 can reciprocate under the action of the air pressure difference between the first chamber 402 and the second chamber 403 .

[0061] Combination Figure 4 As shown, the flexible member 33 includes a vibrating portion 331 and fixing portions 332 located on both sides of the outer periphery of the vibrating portion 331. The fixing portions 332 are used to fix the flexible member 33 to the cover 40, and the fixing portions 332 are clamped between the first cover 42 and the second cover 43. One end of the vibrating portion 331 away from the fixing portion 332 is connected to the piston portion 31.

[0062] In one embodiment of the present invention, an annular groove is disposed on the outer circumferential surface of the piston portion 31 , and one end of the vibrating portion 331 away from the fixing portion 332 is disposed in the annular groove.

[0063] In one embodiment of the present invention, Figure 1 As shown, the second cover body 43 is provided with a accommodating cavity 432, and a first annular groove 433 is formed at the bottom of the accommodating cavity 432. The first cover body 42 has an annular flange, and a second annular groove 424 is formed between the annular flange and the side wall of the accommodating cavity 432. The fixing parts 332 on both sides of the outer periphery of the vibration part 331 are respectively located in the first annular groove 433 and the second annular groove 424.

[0064] In one embodiment of the present invention, the fixing portion 332 is an elastic seal that can form a sealing structure at the connecting gap between the first cover body 42 and the second cover body 43 to prevent the gas in the accommodating cavity 432 from escaping from the connecting gap between the first cover body 42 and the second cover body 43 and causing gas leakage.

[0065] In one embodiment of the present invention, Figure 4 As shown, the column 32 of the plunger telescopic structure 30 is formed with a radial protrusion 321, which is located in the through hole 41 of the first cover body 42 and slidably cooperates with the inner wall of the first cover body 42. The structure formed with the radial protrusion 321 on the column 32 provides support and guidance for the column 32. Based on the support structure of the radial protrusion 321, the radial swing of the column 32 in the reciprocating motion is reduced or even avoided. At the same time, the support structure has a guiding effect on the movement of the column 32, ensuring that the reciprocating motion of the plunger telescopic structure 30 has good linearity.

[0066] In some specific embodiments of the present invention, a sliding seal 322 is provided between the radial protrusion 321 and the inner wall of the first cover 42. The radial protrusion 321 reciprocates with the column 32 in the through hole 41, and the sliding seal 322 is in sliding contact with the radial protrusion 321 or the inner wall of the first cover 42 to reduce the friction resistance of the reciprocating movement of the column 32.

[0067] Optionally, the sliding seal 322 has a lubricating function, for example, lubricating oil or grease is injected into the mounting groove to further reduce the friction resistance between the radial protrusion 321 and the inner wall of the first cover body 42 when the column 32 reciprocates.

[0068] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0069] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A vitrectomy head device for ophthalmic surgery, characterized in that: include: The seat body comprises an outer shell and an inner shell, wherein the outer shell has a wall portion, the wall portion forms an inner cavity, a first extension tube connected to the wall portion is arranged in the inner cavity, the inner shell is sleeved in the first extension tube, and the inner shell is suitable for connecting with the driving device; The cutter head comprises an outer cutter tube and an inner cutter tube, wherein the outer cutter tube is sleeved outside the inner cutter tube, the outer cutter tube is fixed to one end of the outer shell, the inner cutter tube passes through the wall portion and is connected to the inner shell, the inner cutter tube and the side walls of the outer cutter tube are provided with windows, and the inner cutter tube can move along the axial direction of the outer cutter tube under the drive of the inner shell, so that the window of the inner cutter tube and the window of the outer cutter tube form a shearing effect; A cover body, the cover body is connected to the other end of the shell, the cover body is provided with a second extension tube, the second extension tube is sleeved outside the first extension tube, and the second extension tube abuts against the outer side wall of the first extension tube; The inner shell is provided with a first channel, and the inner knife tube passes through the wall portion and is connected to the first channel; the inner shell is provided with a groove portion connected to the first channel, and the outer wall of the inner knife tube is at least partially exposed to the groove portion, and the groove portion is used for injecting sealant.

2. The vitrectomy head device for ophthalmic surgery according to claim 1, characterized in that: The inner shell is provided with a second passage, and the second passage is suitable for connecting with a suction device; The second extension pipe has an escape opening for escaping the second passage.

3. The vitrectomy head device for ophthalmic surgery according to claim 1, characterized in that: The cover body includes a first cover body and a second cover body, the first cover body and the second cover body are connected, the first cover body is connected to the second extension tube, and the second cover body is connected to the other end of the shell.

4. The vitrectomy head device for ophthalmic surgery according to claim 3, characterized in that: The first cover body is clamped with the second cover body.

5. The vitrectomy head device for ophthalmic surgery according to claim 4, characterized in that: The driving device includes a plunger telescopic structure and a flexible member. The plunger telescopic structure includes a column and a piston part connected to the column. The column is connected to the inner shell. The outer periphery of the piston part is connected to the flexible member. The flexible member is clamped between the first cover body and the second cover body.

6. The vitrectomy head device for ophthalmic surgery according to claim 5, characterized in that: The second cover body is provided with a receiving cavity having an open end, the first cover body is located in the receiving cavity, and the outer periphery of the flexible member is clamped and fixed between the first cover body and the second cover body.

7. The vitrectomy head device for ophthalmic surgery according to claim 6, characterized in that: A first annular groove is formed at the bottom of the accommodating cavity, the first cover body has an annular flange, a second annular groove is formed between the annular flange and the side wall of the accommodating cavity, the flexible part includes a vibrating part and fixed parts located on both sides of the outer periphery of the vibrating part, and the two fixed parts are respectively located in the first annular groove and the second annular groove.

8. The vitrectomy head device for ophthalmic surgery according to claim 5, characterized in that: The outer peripheral surface of the piston part is provided with an annular groove, and the flexible member is connected in the annular groove.

9. The vitrectomy head device for ophthalmic surgery according to claim 6, characterized in that: The first cover body is provided with a sliding cavity, the sliding cavity is communicated with the accommodating cavity, the column is located in the sliding cavity and passes through one end of the sliding cavity, the column is formed with a radial protrusion, and the radial protrusion is slidably matched with the sliding cavity.

10. The vitrectomy head device for ophthalmic surgery according to claim 6, characterized in that: A second through hole is provided in the middle of the second cover body, and first through holes are provided at the edges of the first cover body and the second cover body. Both the first through hole and the second through hole are connected to the accommodating cavity, and the outlets of the first through hole and the second through hole are respectively located on both sides of the thickness direction of the flexible part.

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