Cutting instrument and vitreous cutting equipment

Abstract

The invention relates to the technical field of surgical instruments, and discloses a cutting instrument and vitrectomy equipment, and the cutting instrument comprises a fastening assembly and a cutting assembly. The fastening assembly comprises a supporting piece, a connecting piece and an operating piece, a mounting cavity is defined in the operating piece, the connecting piece is connected to the operating piece, the supporting piece is connected to the side, away from the operating piece, of the connecting piece, the supporting piece is provided with a hollow structure, and the two opposite sides of the supporting piece are communicated through the hollow structure; the cutting assembly comprises a holding part and a cutting part, the cutting part is provided with a first end and a second end which are opposite, the first end is connected to the holding part, the holding part is movably arranged in the mounting cavity, and the second end penetrates through the hollow structure and is suitable for cutting the glass body; the holding piece can move in the mounting cavity relative to the operating piece so as to drive the cutting piece to move relative to the supporting piece. According to the cutting instrument, the rigidity strength of the cutting piece can be improved, and the cutting piece can be adjusted according to operation requirements. The vitreous cutting equipment with the cutting instrument also has the advantages.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical instruments, in particular to a cutting instrument and a vitreous cutting device. BACKGROUND

[0002] In ophthalmic cutting surgery, a cutting instrument is needed to cut the pathological tissue in the eye. The cutting instrument includes a cutting piece and a holding piece. The cutting piece is cantilevered relative to the holding piece, so the rigidity of the cutting piece will affect the stability and accuracy of the operation.

[0003] In related technologies, a fixing piece is added at the connection between the holding piece and the cutting piece to fixedly connect the holding piece and the cutting piece, thereby improving the rigidity of the cutting piece. However, the fixed connection mode cannot adjust the cutting piece relative to the holding piece, so the cutting piece cannot be adjusted according to different operation requirements in the surgery. Moreover, the fixed connection mode has limited reinforcement effect on the end of the cutting piece away from the holding piece, and still cannot meet the required rigidity of the cutting piece. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a cutting instrument that can improve the rigidity of the cutting piece and the cutting piece can be adjusted according to the operation requirements.

[0005] The present application also provides a vitreous cutting device having the above cutting instrument.

[0006] The cutting instrument according to the first aspect of the present application comprises a fastening assembly and a cutting assembly.

[0007] The fastening assembly comprises a support piece, a connecting piece and an operating piece. The operating piece has an installation cavity defined inside. The connecting piece is connected to the operating piece. The support piece is connected to the side of the connecting piece away from the operating piece. The support piece has a hollow structure that is open through opposite sides of the support piece. The cutting assembly comprises a holding piece and a cutting piece. The cutting piece has opposite first and second ends. The first end is connected to the holding piece. The holding piece is movably arranged in the installation cavity. The cutting piece is arranged in the hollow structure. The second end is adapted to cut the vitreous body. The holding piece can be moved relative to the operating piece in the installation cavity to drive the cutting piece to move relative to the support piece.

[0008] The cutting instrument according to the embodiments of the present application has at least the following beneficial effects: the cutting member can be accommodated in the hollow structure of the support member after the holding member of the cutting assembly is assembled in the mounting cavity, so that the support member can support the cutting member, thereby improving the rigidity of the cutting member. Moreover, the holding member is movably arranged in the mounting cavity, and when the holding member is moved and adjusted in the mounting cavity relative to the operation member, the holding member can drive the cutting member to move relative to the support member, so that the support member can be supported at different positions of the cutting member, thereby further improving the use rigidity of the cutting member and enabling the cutting member to be adjusted as required.

[0009] According to some embodiments of the present application, the fastening assembly comprises at least one connecting member, one end of the at least one connecting member being arranged on the operation member, and the other end being connected to the support member.

[0010] According to some embodiments of the present application, the connecting member has an elastic portion, which is used to deform when the connecting member is subjected to an external force and restore to the original state after the external force is removed.

[0011] According to some embodiments of the present application, the fastening assembly comprises at least two support members, the at least two support members being arranged in sequence along the moving direction of the cutting member, and each of the support members being connected to the connecting member.

[0012] According to some embodiments of the present application, each of the at least two support members is connected to one connecting member, and the connecting members of the at least two support members are oppositely arranged on the operation member. Alternatively, each of the at least two support members is connected to at least two connecting members, and the connecting members connected to the at least two support members are arranged in a staggered manner in the circumferential direction of the operation member.

[0013] According to some embodiments of the present application, the cutting instrument comprises an adjusting member, the adjusting member being connected to the operation member and the holding member, and the adjusting member being used to control the movement of the holding member relative to the operation member.

[0014] According to some embodiments of the present application, the adjusting member comprises a moving portion and an adjusting portion, the adjusting portion being connected to the holding member, the operation member having an adjusting hole, the adjusting hole being communicated with the mounting cavity, the adjusting hole corresponding to at least part of the adjusting portion, the moving portion being movably arranged in the adjusting hole, and the moving portion being engaged with the adjusting portion.

[0015] According to some embodiments of the present application, at least part of the holding member is arranged outside the mounting cavity, the adjusting member comprises an inner thread structure and an outer thread structure, the inner thread structure is arranged on the inner wall of the mounting cavity, and the outer thread structure is arranged on the outer wall of the holding member, and the inner thread structure and the outer thread structure are engaged.

[0016] According to some embodiments of the present application, the cutting member has a first length L1, the supporting member has a second length L2, the relative moving distance between the cutting member and the supporting member is a stroke S, and the eye axis has a third length L3, wherein the first length L1, the second length L2, the third length L3 and the stroke S satisfy: L1-L2-S≥L3.

[0017] According to the second aspect of the embodiments of the present application, the glass cutting device is used for cutting a vitreous body, and the glass cutting device comprises the cutting instrument described in any of the above embodiments and a driving device. The driving device is connected to the side of the holding member away from the cutting member, and the driving device is used for driving the cutting member to cut the vitreous body.

[0018] According to the glass cutting device of the embodiments of the present application, at least the following beneficial effects are achieved: the supporting member and the connecting member can provide support and fixing effects for the cutting member to improve the rigidity of the cutting member in use, thereby improving the stability and accuracy of the operation. In addition, the holding member is movably arranged in the mounting cavity, so that the holding member can drive the cutting member to move to achieve the adjusting effect, so that the cutting instrument can adapt to different cutting operations, thereby improving the adaptability of the glass cutting device.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and embodiments, wherein: Figure 1 It is a schematic view of the cutting instrument in the embodiments of the present application; Figure 2 It is a schematic view of the cutting instrument in the embodiments of the present application; Figure 3 It is a schematic view of the cutting assembly in the embodiments of the present application; Figure 4 It is a schematic view of the fastening assembly in the embodiments of the present application; Figure 5 It is a sectional view of the fastening assembly in the embodiments of the present application; Figure 6 It is a schematic view of the cutting instrument in the embodiments of the present application; Figure 7A schematic view of a cutting assembly in an embodiment of the present application; Figure 8 A schematic view of a cutting device in an embodiment of the present application; Figure 9 A sectional view of a fastening assembly in an embodiment of the present application; Figure 10 A schematic view of a cutting device in an embodiment of the present application; Figure 11 A schematic view of a glass cutting apparatus in an embodiment of the present application.

[0021] Reference signs: A glass cutting apparatus 10; A cutting device 100; a driving device 200; A fastening assembly 110; a support 111; a hollow structure 1111; a connecting piece 112; an operating piece 113; a mounting cavity 1131; an adjusting hole 1132; an axis X; A cutting assembly 120; a holding piece 121; a cutting piece 122; a first end 1221; a second end 1222; An adjusting piece 130; a movable part 131; an adjusting part 132; an inner thread structure 133; an outer thread structure 134. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which examples of the embodiments are shown, wherein the same or similar notations are used to denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0023] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application, which does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0024] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0025] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense, and the specific meanings of the words in the present application can be determined by the skilled in the art in combination with the specific content of the technical solutions.

[0026] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The cutter and the vitreous cutting device according to the first and second aspects of the present application will be described below with reference to the accompanying drawings.

[0028] The first aspect of the present application provides a cutting instrument 100 for cutting the vitreous body of an eyeball, as shown in Figures 1 to 4 The cutting instrument 100 includes a fastening assembly 110 and a cutting assembly 120. The fastening assembly 110 includes a support 111, a connecting piece 112 and an operating piece 113. The operating piece 113 is a handle of the cutting instrument 100, and is held by a user when the user uses the cutting instrument 100. The interior of the operating piece 113 defines a mounting cavity 1131 for mounting part of the cutting assembly 120. The connecting piece 112 is connected to the operating piece 113, and the support 111 is connected to the side of the connecting piece 112 away from the operating piece 113, i.e. one end of the connecting piece 112 is connected to the operating piece 113, and the other end is connected to the support 111. The support 111 has a hollow structure 1111 which passes through the opposite sides of the support 111 along the axial direction of the support 111.

[0029] The cutting assembly 120 comprises a holding member 121 and a cutting member 122. The cutting member 122 has a first end 1221 and a second end 1222 oppositely arranged. The first end 1221 of the cutting member 122 is connected to the holding member 121, and the second end 1222 is cantilevered relative to the holding member 121. The second end 1222 of the cutting member 122 is used to cut the vitreous body of the eye. When the cutting assembly 120 and the fastening assembly 110 are assembled, the holding member 121 is accommodated in the mounting cavity 1131, and the cutting member 122 is inserted into the hollow structure 1111 of the support member 111 through the second end 1222 to be supported and fixed by the support member 111. The holding member 121 can be telescopically moved in the mounting cavity 1131 relative to the operating member 113. When the holding member 121 moves, the cutting member 122 also moves relative to the support member 111, so as to change the support position of the cutting member 122 by the support member 111.

[0030] Specifically, in one example, the cutting assembly 120 is an existing surgical instrument. When the cutting assembly 120 is used, the holding member 121 is the part held by the user. In this embodiment, the holding member 121 is accommodated in the mounting cavity 1131, and the operating member 113 is held by the user instead of the holding member 121. When the cutting assembly 120 and the fastening assembly 110 are assembled, the support member 111 covers the outside of the cutting member 122 to provide support for the cutting member 122. The part between the second end 1222 of the cutting member 122 and the support member 111 is the part of the cutting member 122 used to cut the lesion assembly. Therefore, when it is necessary to extend the cutting part of the cutting member 122, the holding member 121 needs to be telescopically moved relative to the operating member 113, so that the holding member 121 extends out of the mounting cavity 1131 to increase the length of the part of the cutting member 122 used for cutting. When it is necessary to shorten the cutting part of the cutting member 122, the holding member 121 needs to be telescopically moved relative to the operating member 113, so that a larger part of the holding member 121 is accommodated in the mounting cavity 1131 to shorten the distance between the support member 111 and the second end 1222, thereby reducing the length of the part of the cutting member 122 used for cutting.

[0031] In the related art, because the vitreous body of each patient is different in size when cutting the lesion tissue in the eye, the cutting tube is arranged to have sufficient length to adapt to different vitreous bodies. However, the cutting member is cantilevered, that is, one end of the cutting member is connected to the holding member, and the other end is cantilevered. Therefore, as the distance between the cutting member and the holding member becomes farther and farther, the rigidity of the cutting member gradually weakens. When the cutting member contacts the vitreous body for cutting, the cutting member may bend or vibrate due to insufficient rigidity, causing cutting difficulty, thereby affecting the stability and accuracy of the ophthalmic surgery.

[0032] Compared with the technical solution of fixing the cutting member and the holding member in the related art, the cutting instrument 100 in the embodiment of the present application connects the support member 111 at the end of the operating member 113 through the connecting member 112, so that after the holding member 121 of the cutting assembly 120 is assembled in the mounting cavity 1131, the cutting member 122 can be accommodated in the hollow structure 1111 of the support member 111, so that the support member 111 can support the cutting member 122, thereby improving the rigidity of the cutting member 122. Moreover, the holding member 121 is movably arranged in the mounting cavity 1131, and when the holding member 121 is movably adjusted in the mounting cavity 1131 relative to the operating member 113, the holding member 121 can drive the cutting member 122 to move relative to the support member 111, so that the support member 111 can be supported at different positions of the cutting member 122, thereby further improving the use rigidity of the cutting member 122 and enabling the cutting member 122 to be adjusted as required.

[0033] In some embodiments, referring to Figures 1 to 4 As shown, the fastening assembly 110 includes at least one connecting member 112, one end of the at least one connecting member 112 being connected to the operating member 113 and the other end being connected to the support member 111. Specifically, in one example, the number of the connecting member 112 and the support member 111 is one. One end of the connecting member 112 is connected to the operating member 113 and the other end is connected to the support member 111 to provide support for the support member 111. In this embodiment, the overall structure of the cutting instrument 100 can be simplified by reducing the number of the connecting member 112 connected to the support member 111.

[0034] In another embodiment, the number of the connecting member 112 included in the fastening assembly 110 is two. The two connecting members 112 are arranged obliquely, one end of the two connecting members 112 being oppositely arranged on the operating member 113 and the other end being obliquely arranged towards the axis X of the operating member 113 to jointly support the support member 111. Further, the operating member 113 has a center point, and the axis X of the operating member 113 passes through the center point. When the two connecting members 112 are connected to the operating member 113, the line connecting the ends of the two connecting members 112 also passes through the center point of the operating member 113, i.e., the two connecting members 112 are arranged on the two sides of the center point of the operating member 113. In this way, the two connecting members 112 can provide support for the support member 111 from different directions, so that the support member 111 is subjected to more uniform force and the support stability of the support member 111 is improved.

[0035] In other embodiments, the fastening assembly 110 includes at least three connecting members 112. The operating member 113 is a regular-shaped structural member having an axis X, and the at least three connecting members 112 are arranged around the axis X and are spaced apart around the circumference of the operating member 113. One end of the at least three connecting members 112 is connected to the operating member 113, and the other end is connected to the support member 111.

[0036] Specifically, in one of the embodiments, referring to Figure 4 In this embodiment, the center line of the hollow structure 1111 of the support member 111 coincides with the axis X of the operating member 113, and the other end of the three connecting members 112 is inclined towards the axis X and is connected to the support member 111 to fix the support member 111. The one end of the three connecting members 112 is equidistantly spaced apart around the circumference of the operating member 113, i.e., the distance between the three connecting members 112 is the same. For example, the operating member 113 is a cylindrical structure, and the three connecting members 112 are connected to the end of the operating member 113, and the angle between the adjacent two connecting members 112 is 120 degrees. The three connecting members 112 are connected to different positions of the support member 111, so that the three connecting members 112 can apply the same force to the support member 111 in different directions, thereby ensuring that the support member 111 does not displace relative to the cutting member 122 when the cutting member 122 moves. In addition, the at least three connecting members 112 are arranged in a polygonal shape (such as a triangular shape), thereby improving the fixing stability of the support member 111, and further improving the support of the support member 111 to the cutting member 122 and the rigidity of the cutting member 122.

[0037] In another embodiment, the connecting member 112 has an elastic portion for deforming when the connecting member 112 is subjected to an external force and driving the connecting member 112 to return to the original state after the external force disappears. In this embodiment, the overall structure of the connecting member 112 is made of an elastic material, and it can be understood that the overall structure of the connecting member 112 is the elastic portion. When the cutting member 122 moves relative to the support member 111 to change the support position of the support member 111 to the cutting member 122, friction is generated between the cutting member 122 and the support member 111, thereby causing the support member 111 to have a tendency to move the connecting member 112. The connecting member 112 having the elastic portion can deform when the cutting member 122 moves, thereby providing a damping effect for the movement of the support member 111, thereby improving the relative movement effect of the cutting member 122 and the support member 111, such as improving the movement feeling of the cutting member 122.

[0038] And, when cutting the lesion tissue in the eye with the cutting instrument 100, the connecting member 112 and the support member 111 need to be placed outside the lesion tissue, that is, only the cutting member 122 can extend into the interior of the vitreous body to perform the cutting operation. If the adjustment distance of the cutting member 122 is too short during cutting, the support member 111 will contact the vitreous body, and at this time the vitreous body will exert a force on the support member 111 to hinder the support member 111 from entering the interior of the vitreous body. Due to the elastic properties of the connecting member 112, the connecting member 112 will deform under the action of the external force, thereby being compressed away from the vitreous body. Thus, the support member 111 can always be on the outside of the vitreous body during cutting, thereby improving the cutting accuracy and efficiency of the operation.

[0039] In other embodiments, part of the structure of the connecting member 112 is an elastic part. The elastic part can be formed by the connecting member 112 being made of an elastic material, or the connecting member 112 being provided with an elastic structural member such as a spring, sponge, or rubber component, so that the connecting member 112 has a deformation property.

[0040] In some embodiments, the fastening assembly 110 includes at least two support members 111, which are arranged in sequence along the movement direction of the cutting member 122. The at least two support members 111 can be arranged at intervals or connected to each other. When the cutting assembly 120 and the fastening assembly 110 are assembled, the cutting member 122 is accommodated inside the hollow structure 1111 of the at least two support members 111. The ends of the at least two support members 111 toward the operating member 113 are respectively connected to different connecting members 112.

[0041] Specifically, in this embodiment, the number of support members 111 is two. In other embodiments, the number of support members 111 can also be three or four or other multiple quantities. The arrangement direction of the support members 111 is the same as the axis X direction of the operating member 113, and when the cutting member 122 is fixed, the cutting member 122 is arranged inside each support member 111. By arranging at least two support members 111, the support effect of the support members 111 on the cutting member 122 can be improved, so that the cutting member 122 can have better rigidity and strength when performing the cutting operation, thereby improving the stability and accuracy of the cutting operation. And by arranging at least two support members 111, when the cutting member 122 moves relative to the support members 111 to adjust, the two support members 111 can respectively generate friction with the cutting member 122, thereby providing a damping effect for the movement of the cutting member 122, thereby improving the movement effect of the cutting member 122.

[0042] In some embodiments, the number of the connecting members 112 connected to the at least two support members 111 is one, and the connecting members 112 on the at least two support members 111 are oppositely arranged in the circumferential direction of the operating member 113. It can be understood that the line connecting the connecting members 112 on the at least two support members 111 passes through the axis X of the operating member 113. When the cutting member 122 is arranged in the hollow structure 1111 of the at least two support members 111, the connecting members 112 on the at least two support members 111 can exert support forces in opposite directions on the connecting members 112, thereby avoiding the situation that the cutting member 122 deviates towards one of the connecting members 112, and thus improving the connection stability and rigidity of the cutting member 122.

[0043] In another embodiment, at least two connecting members 112 are respectively connected to the at least two support members 111, i.e., at least two connecting members 112 are connected to one support member 111. For the purpose of understanding and description, two support members 111 are illustratively described, and the number of the connecting members 112 connected to the two support members 111 can be two or three or other number of features. The number of the connecting members 112 on the two support members 111 is the same. When the support members 111 are assembled to the operating member 113 through the connecting members 112, the connecting members 112 on the two support members 111 are arranged on the operating member 113 in the circumferential direction of the axis X of the operating member 113. Moreover, the connecting members 112 on the two support members 111 are arranged on the operating member 113 in an interleaved manner, and the spacing between the connecting members 112 on the operating member 113 is the same.

[0044] It can be understood that the spacing between the connecting members 112 on the support members 111 is the same when the connecting members 112 are connected to the support members 111. When the two support members 111 are connected to the operating member 113, the connecting members 112 on the two support members 111 are arranged on the operating member 113 in an interleaved manner, and the spacing between the connecting members 112 on the operating member 113 is the same. Thus, the support forces exerted by the connecting members 112 on the support members 111 in different directions are the same, thereby improving the installation stability of the support members 111, and thus promoting the support stability of the cutting member 122 by the support members 111. Moreover, when the cutting member 122 is arranged in the hollow structure 1111 of the two support members 111, the support forces exerted by the connecting members 112 on the two support members 111 on the cutting member 122 are also the same in different directions, thereby further improving the installation stability of the cutting member 122 and the rigidity of the cutting member 122 during the operation.

[0045] In some embodiments, referring to Figures 1 to 10As shown, the cutting instrument 100 further comprises an adjusting member 130, which is connected to the operating member 113 and the holding member 121. When the holding member 121 needs to move along the setting path of the mounting cavity 1131 relative to the operating member 113, the movement of the holding member 121 can be controlled by the adjusting member 130, so as to improve the movement efficiency of the cutting member 122 relative to the supporting member 111, thereby improving the cutting stability and accuracy of the cutting member 122.

[0046] In one embodiment, referring to Figures 3 to 6 As shown, the adjusting member 130 comprises a moving part 131 and an adjusting part 132, the adjusting part 132 is connected to the holding member 121, and the operating member 113 is provided with an adjusting hole 1132, which is in communication with the inner wall and the outer wall of the operating member 113 and the mounting cavity 1131. The moving part 131 is arranged in the adjusting hole 1132, and when the holding member 121 is assembled in the mounting cavity 1131 of the operating member 113, the adjusting hole 1132 corresponds to at least part of the adjusting part 132, that is, at least part of the adjusting part 132 is exposed to the external environment through the adjusting hole 1132. When the moving part 131 is assembled into the adjusting hole 1132, the moving part 131 can engage with the adjusting part 132, and the moving part 131 can move relative to the operating member 113, so as to drive the holding member 121 through the adjusting part 132 to achieve the adjustment of the cutting member 122.

[0047] Specifically, the holding member 121 is provided with a flat part arranged along the movement direction of the holding member 121. The adjusting part 132 is a rack structure, which is arranged on the flat part along the setting direction of the flat part, that is, the adjusting part 132 is also arranged along the movement direction of the holding member 121. The outer surface of the moving part 131 is provided with a gear structure, and when the moving part 131 is arranged in the adjusting hole 1132, the moving part 131 can rotate in the adjusting hole 1132 relative to the operating member 113, and due to the limitation of the hole wall of the adjusting hole 1132, the moving part 131 cannot displace relative to the operating member 113. Therefore, when the moving part 131 and the adjusting part 132 are engaged, the moving part 131 can engage with different rack structures on the adjusting part 132 when the moving part 131 rotates relative to the operating member 113, so as to drive the holding member 121 to move relative to the operating member 113, thereby achieving the adjustment of the cutting member 122.

[0048] In other embodiments, the adjusting part 132 and the moving part 131 can also be screw structures, and the rotation of the adjusting part 132 relative to the operating member 113 can also be converted into the telescopic movement of the holding member 121 relative to the operating member 113 through the screw structure, thereby achieving the adjustment of the cutting member 122.

[0049] In another embodiment, referring to Figures 7 to 10As shown, the adjusting member 130 comprises an inner thread structure 133 and an outer thread structure 134, which can be a thread structure or a toothed structure. The inner thread structure 133 is arranged around the inner wall of the mounting cavity 1131. The outer thread structure 134 is arranged around the outer wall of the holding member 121. When the holding member 121 is assembled into the mounting cavity 1131 of the operating member 113, the inner thread structure 133 will engage with the outer thread structure 134. At this time, the holding member 121 can be moved relative to the operating member 113 by rotating the holding member 121, so as to adjust the cutting member 122.

[0050] Specifically, in this embodiment, the inner thread structure 133 and the outer thread structure 134 are thread structures. When the holding member 121 is assembled into the mounting cavity 1131, part of the holding member 121 will be located outside the mounting cavity 1131, i.e., the length of the holding member 121 will be greater than the depth of the mounting cavity 1131. After the holding member 121 is assembled into the mounting cavity 1131, part of the holding member 121 will still be exposed outside the mounting cavity 1131. At this time, the user can make the inner thread structure 133 and the outer thread structure 134 move relative to each other by rotating the holding member 121 outside the mounting cavity 1131, so as to realize the movement of the holding member 121 relative to the operating member 113, thereby achieving the effect of adjusting the cutting member 122.

[0051] In some embodiments, the length of the cutting member 122 is set as a first length L1, the length of the supporting member 111 is set as a second length L2, the relative movement distance between the cutting member 122 and the supporting member 111 is set as a stroke S, and the length of the eye axis of the eye to be cut is set as a third length L3. In a specific application, the design of the cutting instrument 100 needs to consider the size limitation of the eye axis (i.e., the length of the vitreous body to be cut). Therefore, in order to ensure that the cutting member 122 can completely cut the pathological assembly, the first length L1 of the cutting member 122, the second length L2 of the supporting member 111, the stroke S of the relative movement between the cutting member 122 and the supporting member 111, and the third length L3 of the eye axis need to satisfy the condition: L1-L2-S≥L3.

[0052] Specifically, since the cutting member 122 is arranged on the supporting member 111, the supporting member 111 will block part of the cutting area of the cutting member 122. When the cutting member 122 moves relative to the supporting member 111 to the maximum stroke S, the supporting member 111 is located closest to the second end 1222 of the cutting member 122. By setting L1-L2-S≥L3, after the cutting member 122 moves through the stroke S, the cutting member 122 still has enough cutting part to extend into the eye to cut the pathological assembly, thereby avoiding the incomplete cutting of the pathological assembly by the cutting member 122.

[0053] The second aspect of the present application provides a vitreous cutting device 10 for cutting vitreous body, referring to Figures 1 to 11 As shown in the figure, the vitreous cutting device 10 comprises a driving device 200 and the cutting instrument 100 described in any of the above embodiments. The driving device 200 is connected to the side of the holding member 121 away from the cutting member 122, and the driving device 200 is used to deliver cutting power to the cutting member 122 to drive the cutting member 122 to cut the vitreous body.

[0054] Specifically, in one example, when using the vitreous cutting device 10, the cutting instrument 100 is adjusted and controlled by grasping the operating member 113. During cutting, the cutting member 122 needs to be adjusted according to the depth of the lesion tissue to be removed by the patient, so that the length of the cutting part on the side of the cutting member 122 away from the holding member 121 is matched with the depth of the lesion tissue, thereby shortening the distance between the support member 111 and the vitreous body, thereby improving the support strength of the support member 111 to the cutting member 122. When the cutting member 122 is inserted into the vitreous body to cut the lesion tissue, the cutting member 122 needs to be driven by the driving device 200 to have a cutting effect. During the cutting operation, the user can adjust the holding member 121 according to the cutting requirements, thereby adjusting the length of the cutting part on the cutting member 122, to improve the stability and accuracy of the operation.

[0055] In this embodiment, the form of the driving device 200 driving the cutting member 122 to perform cutting operation includes but is not limited to single gas cutting, double gas cutting, magnetic cutting or electric cutting. Moreover, the cutting member 122 has a cutting edge, and when the cutting member 122 cuts, the cutting edge contacts the vitreous body to cut the lesion tissue. The driving device 200 drives the cutting edge to move in the form of rotating cutting or axial movement relative to the operating member 113 and the holding member 121 to achieve cutting.

[0056] The vitreous cutting device 10 of the embodiment of the present application can provide support and fixation for the cutting member 122 through the support member 111 and the connecting member 112 to improve the rigidity of the cutting member 122 during use, thereby improving the stability and accuracy of the operation. Moreover, the holding member 121 is movably arranged in the mounting cavity 1131, so that the holding member 121 can drive the cutting member 122 to move to achieve the adjustment effect, so that the cutting instrument 100 can adapt to different cutting operations, thereby improving the adaptability of the vitreous cutting device 10.

[0057] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. Furthermore, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A cutting instrument, characterized in that, The cutting instrument includes: A fastening assembly includes a support, a connector, and an operating member, wherein the operating member has an internally defined mounting cavity, the connector is connected to the operating member, the support is connected to the side of the connector opposite to the operating member, and the support has a hollow structure that connects opposite sides of the support. A cutting assembly includes a gripper and a cutting component, the cutting component having a first end and a second end opposite to each other, the first end being connected to the gripper, the gripper being movably disposed in the mounting cavity, the cutting component passing through the hollow structure, and the second end being adapted to cut glass. The gripper can move relative to the operating member in the mounting cavity to drive the cutting member to move relative to the support member.

2. The cutting instrument according to claim 1, characterized in that, The fastening assembly includes at least one connector, one end of which is disposed on the operating member and the other end is connected to the support member.

3. The cutting instrument according to claim 1, characterized in that, The connector has an elastic portion, which is used to deform when the connector is subjected to an external force and to return to its original shape after the external force is removed.

4. The cutting instrument according to claim 1, characterized in that, The fastening assembly includes at least two support members, which are arranged sequentially along the movement direction of the cutting member, and each support member is connected to the connecting member.

5. The cutting instrument according to claim 4, characterized in that, At least two of the support members are respectively connected to one of the connecting members, and the connecting members of the at least two support members are disposed opposite to the operating member; Alternatively, at least two of the support members are respectively connected to at least two of the connectors, and the connectors connected to the at least two support members are staggered in the circumferential direction of the operating member.

6. The cutting instrument according to claim 1, characterized in that, The cutting instrument includes an adjustment member connected to the operating member and the gripping member, the adjustment member being used to control the movement of the gripping member relative to the operating member.

7. The cutting instrument according to claim 6, characterized in that, The adjusting member includes a movable part and an adjusting part. The adjusting part is connected to the gripping member. The operating member has an adjusting hole that communicates with the mounting cavity. The adjusting hole corresponds to at least a portion of the adjusting part. The movable part is movably disposed in the adjusting hole and engages with the adjusting part.

8. The cutting instrument according to claim 6, characterized in that, At least a portion of the gripping member is disposed on the outside of the mounting cavity. The adjusting member includes an inner textured structure and an outer textured structure. The inner textured structure is disposed around the inner wall of the mounting cavity, and the outer textured structure is disposed around the outer wall of the gripping member. The inner textured structure and the outer textured structure engage with each other.

9. The cutting instrument according to claim 1, characterized in that, The cutting component has a first length L1, the support component has a second length L2, the relative moving distance between the cutting component and the support component is the stroke S, and the axial length has a third length L3. The first length L1, the second length L2, the third length L3 and the stroke S satisfy: L1-L2-S≥L3.

10. A glass cutting device for cutting glass, characterized in that, include: The cutting instrument as described in any one of claims 1 to 9; A driving device is connected to the side of the gripping member away from the cutting member, and the driving device is used to drive the cutting member to cut the glass.

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