Operating trepanning device

Abstract

The operation trepanning device comprises a shell, a rotating assembly, a tool bit and a handle, the rotating assembly is arranged on the shell in a penetrating mode and can rotate relative to the shell and move in the axial direction of the shell, the tool bit is arranged at the front end of the shell, the tool bit is connected with the front end of the rotating assembly, and the tool bit can rotate along with the rotating assembly and move in the axial direction of the shell. The handle comprises a free end and a connecting end which are opposite, the connecting end is connected with the shell, and the handle has an unfolded state and a folded state; compared with the folded state, the free end is farther away from the shell in the radial direction of the shell in the unfolded state. Thus, an operator can fix the operation trepanning device by grabbing the free end of the handle, namely, in the operation process, fingers of the operator are not located between the tool bit and the handle, thickness space for the fingers of the operator does not need to be reserved between the tool bit and the handle, and the operation trepanning device can have the smaller axial length; therefore, the operation convenience of the operation trepanning device in a small space is improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a surgical hole-opening device. Background Art

[0002] The installation of a cardiac assist device requires the use of a hole-opening device to create a hole in the atrium or ventricle. However, for hole-opening in some areas with a small operating space (such as the right atrium), the axial length of the traditional hole-opening device is too long, making it difficult to operate the hole-opening of the hole-opening device. Summary of the Invention

[0003] Based on this, this application provides a surgical hole-opening device with a small axial length and convenient operation.

[0004] This application provides a surgical hole-opening device, including:

[0005] A housing:

[0006] A rotating assembly, the rotating assembly is disposed through the housing and can rotate relative to the housing and move axially along the housing;

[0007] A cutter head, the cutter head is disposed at the front end of the housing, the cutter head is connected to the front end of the rotating assembly, and the cutter head can rotate and move axially along the housing with the rotating assembly; and

[0008] A handle, the handle includes a free end and a connecting end opposite to each other, the connecting end is connected to the housing, and the handle has an unfolded state and a folded state; compared with the folded state, in the unfolded state, the free end is farther away from the housing in the radial direction of the housing.

[0009] In an embodiment of this application, the surgical hole-opening device has a cutting state. In the cutting state, the axial distance between the cutter head and the connecting end of the handle along the housing is 8 mm to 15 mm; and / or, the free end can be grasped by an operator.

[0010] In an embodiment of this application, the connecting end is rotatably connected to the housing, and the rotation axis of the handle is perpendicular to the axial movement direction of the rotating assembly.

[0011] In an embodiment of this application, the connecting end is provided with a rotating portion and a engaging portion. The rotating portion is rotatably connected to the housing, and the engaging portion can rotate with the rotating portion; the housing is provided with a cooperating portion, the cooperating portion is disposed on the rotation path of the engaging portion, and when the handle rotates to the unfolded state, the engaging portion can engage with the cooperating portion to maintain the unfolded state of the handle.

[0012] In an embodiment of the present application, the handle further includes a main body portion connected between the connection end and the free end. The rotation portion and the engagement portion extend from the main body portion in a direction away from the free end. The rotation portion and the engagement portion are spaced apart. The engagement portion has elasticity, and one end of the engagement portion away from the main body portion can be engaged with the mating portion.

[0013] In an embodiment of the present application, the engagement portion includes a rod portion extending from the main body portion in a direction away from the free end and a hook portion provided at one end of the rod portion away from the main body portion. In a direction perpendicular to the extension direction of the rod portion, the thickness of the rod portion is smaller than the thicknesses of the rotation portion and the main body portion, so that the engagement portion has elasticity, and the hook portion can be engaged with the mating portion.

[0014] In an embodiment of the present application, the mating portion includes a connection section and a limiting section connected to the connection section. The connection section is connected to the housing. The limiting section extends from a side of the connection section away from the housing in the axial direction of the housing towards the front end of the housing, so that the connection section, the limiting section and the housing jointly define a limiting cavity. The limiting section can be hooked with the hook portion, and when the limiting section is hooked with the hook portion, the hook portion is located in the limiting cavity, and the limiting cavity can prevent the hook portion from coming out.

[0015] In an embodiment of the present application, the limiting cavity has spaced and opposite first cavity wall and second cavity wall. The first cavity wall is parallel to the second cavity wall. The first cavity wall is the surface of the limiting section, and the second cavity wall is the outer surface of the housing. The hook portion has a first surface and a second surface opposite to the first surface. The rod portion has a third surface connected to the first surface. The third surface is perpendicular to the first surface. When the limiting section is hooked with the hook portion, the hook portion can be movably received in the limiting cavity. The first surface can be inclined relative to the first cavity wall, and the second surface can abut against the second cavity wall. The limiting section can abut against the third surface or the hook portion can abut against the first cavity wall to prevent the hook portion from coming out of the limiting cavity. The first surface can also be parallel and spaced from the first cavity wall, and when the first surface is parallel to the first cavity wall, the second surface is spaced from the second cavity wall.

[0016] In an embodiment of the present application, when the hook portion is located in the limiting cavity and the first surface is parallel to the first cavity wall, the second surface is parallel to the second cavity wall, wherein:

[0017] The distance between the first surface and the first cavity wall is 0.02 mm to 0.05 mm; and / or

[0018] The distance between the second surface and the second cavity wall is 0.02 mm to 0.05 mm.

[0019] In an embodiment of the present application, an arc-shaped guiding surface is provided on a side of the engaging portion facing away from the housing, and an arc-shaped sliding surface is provided on a side of the hook portion facing away from the rod portion. The sliding surface can slide along the guiding surface to guide the hook portion to slide into the limiting cavity.

[0020] In an embodiment of the present application, the number of the rotating portions is two, the engaging portion is located between the two rotating portions, and the engaging portion is spaced from both of the two rotating portions by a certain distance;

[0021] And / or, two lugs are further provided on an outer surface of the housing, the engaging portion is located between the two lugs, the rotating portion is rotatably connected to the two lugs, and the rotating portion is located between the two lugs.

[0022] In an embodiment of the present application, the housing includes a housing body, a blade body, and a mounting seat connected between the housing body and the blade body. The blade body can cooperate with the blade head to clamp a target tissue. The mounting seat has a mounting hole, and the aperture of the mounting hole is smaller than the inner diameter of the housing body; the rotating assembly includes a rotating shaft and a rotating member. The rotating shaft is axially movably disposed through the housing. The rotating member is connected to the rear end of the rotating shaft. The rotating shaft includes a shaft rod and a sliding member connected to the rear end of the shaft rod. The shaft rod is disposed through the mounting hole of the mounting seat and the blade body, and the rear end of the shaft rod is received in the housing body. The front end of the shaft rod is close to the front end of the blade body and is connected to the blade head. The sliding member is connected to the rotating member; the opening device further includes an elastic member. The elastic member is sleeved on the shaft rod and is located in the housing body. Two ends of the elastic member respectively abut against the sliding member and an edge of the mounting hole of the mounting seat. Among them, the connecting end is rotatably connected to the mounting seat.

[0023] In an embodiment of the present application, the rotating assembly includes a rotating shaft and a rotating member. The rotating shaft is axially movably disposed through the housing. The rotating member includes an inner built-in portion and an outer turntable connected to the inner built-in portion; wherein, the inner built-in portion is connected to the rear end of the rotating shaft, and the outer turntable can drive the rotating shaft to rotate and axially move along the housing through the inner built-in portion. At least when the rotating member moves in a direction close to the front end of the housing, at least a part of the outer turntable can be sleeved on the outer periphery of the housing.

[0024] In an embodiment of the present application, the outer turntable includes an annular body, the annular body is connected to the built-in part, the annular body can drive the rotating shaft to rotate and move axially along the outer shell through the built-in part, and the inner diameter of the annular body is greater than the outer diameter of the rear end of the outer shell, so that when the outer turntable moves towards the front end of the outer shell, at least part of the annular body can be sleeved on the outer periphery of the outer shell.

[0025] In an embodiment of the present application, the outer turntable further includes a guiding part connected to the annular body, the guiding part extends axially along the outer shell from the front end of the annular body, and the guiding part can slide along the outer wall of the outer shell.

[0026] In an embodiment of the present application, a receiving gap for receiving the outer wall of the rear end of the outer shell is formed between the built-in part and the outer turntable. When the rotating part moves towards the front end of the outer shell, the shell wall of the rear end of the outer shell can be received in the receiving gap;

[0027] And / or, the rotating part further includes a connecting part, the connecting part connects the built-in part and the outer turntable; a sliding groove extending axially along the outer shell is formed on the outer shell. When the rotating part moves towards the front end of the outer shell, the connecting part can slide along the sliding groove.

[0028] The present application has at least the following technical effects:

[0029] For the surgical hole opening device of the present application, the axial movement of the rotating assembly can make the cutter head extend and retract relative to the outer shell, so as to realize that the cutter head extends into the target part and clamps the target tissue, and the rotation operation of the rotating assembly can realize the cutting of the target tissue. On this basis, the handle provided on the outer shell has a deployed state and a retracted state, and compared with the retracted state, the free end is farther away from the outer shell in the radial direction of the outer shell in the deployed state, so that during the operation, the operator can hold the free end of the handle with one hand to fix the surgical hole opening device, and turn the rotating assembly with the other hand to drive the cutter head to rotate to realize the cutting of the tissue, that is, during the operation, the operator's fingers are not located between the cutter head and the handle, and there is no need to reserve the thickness space of the operator's fingers between the cutter head and the handle, so that the surgical hole opening device can have a smaller axial length, thereby improving the operation convenience of the surgical hole opening device in a smaller space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the surgical hole opening device according to an embodiment of the present application when the handle is in the retracted state.

[0031] Figure 2 is Figure 1 A schematic structural diagram of the surgical hole opening device shown when the handle is in the deployed state and the cutter head extends out.

[0032] Figure 3 is Figure 1 a schematic structural view of the handle of the surgical opening device shown.

[0033] Figure 4 is Figure 1 an assembly drawing of the housing and the mounting seat of the surgical opening device shown.

[0034] Figure 5 is Figure 1 a schematic structural view of the surgical opening device shown when the handle is in the unfolded state and the cutter head is retracted.

[0035] Figure 6 is Figure 5 a cross-sectional view along the A-A direction.

[0036] Figure 7 is Figure 6 a partial enlarged view at P1.

[0037] Figure 8 is Figure 7 a partial enlarged view at P2.

[0038] Figure 9 is Figure 1 an exploded view of the surgical opening device shown.

[0039] Figure 10 is Figure 1 a schematic structural view of the surgical opening device shown when the handle is in the folded state and the cutter head is retracted.

[0040] Figure 11 is Figure 10 a cross-sectional view along the B-B direction.

[0041] Figure 12 is Figure 2 a longitudinal cross-sectional view of the surgical opening device shown.

[0042] Among them, the above-mentioned drawings include the following reference numerals:

[0043] 10. Surgical opening device; 100. Housing; 110. Shell; 111. Movable cavity; 113. Opening; 115. Slide groove; 117. Card slot; 130. Mounting seat; 131. Outer surface; 132. Fitting part; 1321. Connection section; 1323. Limiting section; 1324. Limiting cavity; 1324a. First cavity wall; 1324b. Second cavity wall; 1325. Guide surface; 134. Lug; 134a. First lug; 1342. First hole; 134b. Second lug; 1343. Second hole; 1341. Avoidance groove; 136. Mounting hole; 150. Blade body; 151. First blade edge; 160. Stopping part; 200. Rotating assembly; 220. Rotating shaft; 221. Shaft rod; 223. Sliding part; 240. Rotating part; 240a. Receiving gap; 241. Built-in part; 243. Outer turntable; 2431. Ring body; 2432. Anti-slip part; 2433. Guide part; 245. Connection part; 300. Tool bit; 310. Second blade edge; 320. Tool tip; 400. Handle; 420. Free end; 440. Connection end; 441. Rotating part; 443. Engaging part; 4431. Rod part; 4432. Hook part; 4433. First surface; 4434. Second surface; 4435. Third surface; 4436. Sliding surface; 450. Step; 460. Main body part; 461. Groove; 500. Pin shaft; 600. Elastic part; L. Length direction; W. Width direction; I. Axis; II. Generatrix. Detailed implementation manners

[0044] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0046] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0049] If an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0050] It should be noted that the "front end" and "back end" throughout the text are only for indicating the relative position relationship. The "front end" of a component is the end far from the operator; the "back end" of a component is the end close to the operator. The axial direction refers to the axis direction of the outer shell, the radial direction refers to the radius direction of the outer shell, and the circumferential direction refers to the circumferential direction of the outer shell. This axial, radial and circumferential directions are applicable to the surgical hole opening device and its various components, and will not be elaborated later. The length of the surgical hole opening device refers to the dimension of the surgical hole opening device along the axial direction.

[0051] Traditional hole - opening knives are relatively long. A handle is arranged in the radial direction of the hole - opening knife, with a fixed radial length and fixedly connected to the outer shell of the hole - opening knife. When performing a hole - opening operation on a target tissue, the operator holds the outer shell with two fingers of the left hand and hooks two radially extending handles symmetrically arranged on the outer shell to fix the hole - opening knife. Then, the operator rotates a rotating part with the right hand to drive the cutter head to rotate, thereby realizing tissue cutting work. And during the operation process (for example, making a hole in the apex of the heart for installing a ventricular assist device), the two fingers used to hook the handle are located between the ventricular connection mechanism pre - installed on the apex of the heart for installing the ventricular assist device and the handle. In other words, in the cutting state of the traditional hole - opening knife, the axial distance between the cutter head and the handle should at least be able to accommodate the thickness of the ventricular connection mechanism and the thickness of the operator's fingers. However, for tissue cutting at some locations with limited operating space (for installing a ventricular assist device), such as the atrial wall of the right atrium, the axial length of the traditional hole - opening knife is too long, making it difficult to operate when making a hole in the right atrium with limited space. But if set according to the handle setting method of the traditional hole - opening knife, it is difficult for the axial distance between the cutter head and the handle to accommodate the thickness of the ventricular connection mechanism and the thickness of the operator's fingers at the same time.

[0052] Therefore, the present application provides a surgical hole - opening device, the handle of which has a deployed state and a retracted state. Compared with the retracted state, in the deployed state, the free end is farther from the outer shell in the radial direction of the outer shell. In this way, the operator can fix the surgical hole - opening device by grasping the free end of the handle. That is, during the operation process, the operator's fingers are not located between the cutter head and the handle, and there is no need to reserve space for the thickness of the operator's fingers between the cutter head and the handle, enabling the surgical hole - opening device to have a smaller axial length, thereby improving the operation convenience of the surgical hole - opening device in a smaller space. The following will detail the surgical hole - opening device provided by the present application in combination with specific embodiments and the accompanying drawings of the specification.

[0053] It should be noted that this surgical hole - opening device can make a hole in the target site. The target site can be the atrial wall of the right atrium for installing a right - heart assist device, or the atrial wall of the left atrium, the ventricular wall of the right ventricle, the left ventricle, or other organs for making a hole to meet the surgical requirements.

[0054] Please refer to Figures 1 to 6 The surgical hole - opening device 10 provided by the present application includes an outer shell 100, a rotating assembly 200, a cutter head 300, and a handle 400.

[0055] The overall shape of the outer shell 100 is generally cylindrical. In the present application, the axial direction refers to the length direction of the outer shell 100; the radial direction refers to the radial direction of the outer shell 100, and the radial direction is perpendicular to the axial direction.

[0056] The rotating assembly 200 is disposed through the housing 100 and is capable of rotating relative to the housing 100 and moving axially along the housing 100. Specifically, the rotating assembly 200 can rotate relative to the housing 100 and move axially along the housing 100 under the drive of an external force. In the illustrated embodiment, a part of the rotating assembly 200 is disposed through the housing 100 and a part of it is sleeved on the housing 100.

[0057] The cutter head 300 is a tool for cutting tissue. The cutter head 300 can perform cutting on the target tissue to achieve an opening operation. The cutter head 300 is disposed at the front end of the housing 100, and the cutter head 300 is connected to the front end of the rotating assembly 200. Specifically, the cutter head 300 is disposed at the front end in the axial direction of the housing 100. The cutter head 300 can rotate and move axially along with the rotating assembly 200. That is, the rotating assembly 200 can drive the cutter head 300 to extend or retract axially relative to the housing 100, and can also drive the cutter head 300 to rotate relative to the housing 100. The cutter head 300 can cooperate with the front end of the housing 100 to clamp the target tissue. The cutter head 300 rotates with the rotating assembly 200 to achieve cutting of the tissue. The connection between the cutter head 300 and the front end of the rotating assembly 200 can be welding, threaded connection, bonding, etc.

[0058] The handle 400 has opposite free end 420 and connection end 440. The connection end 440 is connected to the housing 100, and the free end 420 can be grasped by the operator to facilitate the operation of the operator. The handle 400 has a deployed state and a retracted state. Compared with the retracted state, in the deployed state, the free end 420 is farther from the housing 100 in the radial direction. That is, in the deployed state, the handle 400 is deployed relative to the housing 100, and the free end 420 is away from the housing 100 in the radial direction of the housing 100; in the retracted state, the handle 400 is retracted relative to the housing 100, and the free end 420 is closer to the housing 100 than in the deployed state.

[0059] It can be understood that when the surgical opening device 10 is in the working state, the handle 400 needs to be deployed to facilitate the grasping of the operator. When the surgical opening device 10 is in the non - working state, the handle 400 can be retracted to reduce the radial dimension of the surgical opening device 10, facilitating the storage and transportation of the surgical opening device 10.

[0060] In this application, the handle 400 is configured to have a deployed state and a retracted state. Compared with the retracted state, in the deployed state, the free end 420 is farther away from the housing 100 in the radial direction. During the operation, the operator can hold the free end 420 of the handle 400 with one hand to fix the surgical opening device 10, and rotate the rotating assembly 200 with the other hand to drive the cutter head 300 to rotate, so as to cut the tissue. That is, during the operation, the operator's fingers are not located between the cutter head 300 and the handle 400, and there is no need to reserve the thickness space for the operator's fingers between the cutter head 300 and the handle 400, so that the surgical opening device 10 can have a smaller axial length, thereby improving the operation convenience of the surgical opening device 10 in a smaller space.

[0061] In addition, the handle 400 can have a smaller radial dimension in the retracted state, which is beneficial to the storage and transportation of the surgical opening device 10.

[0062] The surgical opening device 10 has a cutting state. The cutting state refers to the state in which the surgical opening device 10 cuts the target tissue when the target tissue is clamped between the cutter head 300 and the front end of the housing 100. The cutting state is one of the working states of the surgical opening device 10. In the cutting state, the axial distance between the connecting end 440 of the cutter head 300 and the handle 400 along the housing 100 is 8 mm to 15 mm. In the cutting state, the target tissue is clamped between the cutter head 300 and the housing 100, and the cutter head 300 is generally located at the front end of the housing 100, that is, the axial distance between the connecting end 440 of the cutter head 300 and the handle 400 along the housing 100 is approximately equal to the axial distance between the frontmost end of the housing 100 and the connecting end 440 of the handle 400 along the housing 100. As Figure 6 shown, although Figure 6 the surgical opening device 10 in

[0063] Please refer to Figures 1 to 4More specifically, the housing 100 has an active cavity 111 and an opening 113 at the rear end of the housing 100. The opening 113 is connected to the active cavity 111. A portion of the rotating assembly 200 is disposed in the active cavity 111, and a portion of the rotating assembly 200 is disposed outside the active cavity 111.

[0064] In the illustrated embodiment, the handle 400 can be rotatably mounted on the housing 100, so that the operator can rotate the handle 400 to expand or retract the handle 400 relative to the housing 100, and the operation is more concise and convenient. In addition, the rotating structure is relatively simpler, which reduces the occupied space of the surgical opening device 10. Specifically, the connecting end 440 of the handle 400 can be rotatably connected to the housing 100. In one embodiment, the handle 400 can also be fixedly mounted on the outer wall of the housing 100. For example, the handle 400 can be a telescopic structure. At this time, when the handle 400 is extended, the handle 400 can be in an expanded state, and when the handle 400 is retracted, the handle 400 can be in a retracted state.

[0065] In this embodiment, the rotation axis of the handle 400 is perpendicular to the axial movement direction of the rotating assembly 200. In other words, the rotation axis of the handle 400 is perpendicular to the axial direction of the housing 100, which reduces the space occupied by the handle 400 in the axial direction and avoids the influence of the setting of the handle 400 on the axial movement of the rotating assembly 200 along the housing 100 as much as possible. In some embodiments, the rotation axis of the handle 400 can also be consistent with the radial direction of the housing 100. In some embodiments, the rotation axis of the handle 400 can also be consistent with the axial direction of the housing 100.

[0066] Specifically in the illustrated embodiment, the handle 400 is a plate-like structure. The handle 400 has a length direction L and a width direction W. The free end 420 and the connecting end 440 are arranged along the length direction L. The rotation axis of the handle 400 extends along the width direction W. On the one hand, the free end 420 has a certain width to facilitate the operator to grasp the free end 420. On the other hand, it can reduce the axial space of the housing 100 occupied by the handle 400, reduce the axial length of the housing 100, and help reduce the axial length of the surgical opening device 10. Among them, the width of the handle 400 is roughly equal to the width of an adult's thumb, so that the operator can grasp it easily.

[0067] In the folded state, the direction from the free end 420 to the connection end 440 is consistent with the axial direction of the housing 100, so that the handle 400 is closer to the housing 100 when folded, thereby further reducing the overall size of the surgical opening device 10 in the folded state. In the illustrated embodiment, when the handle 400 is in the folded state, the free end 420 is closer to the rear end of the housing 420 than the front end of the housing 100.

[0068] See also Figure 5 andFigure 6 When in the unfolded state, the rotation angle of the handle 400 from the retracted state to the unfolded state is 90°, so that the distance from the free end 420 to the housing 100 is the farthest in the unfolded state, which further facilitates the grasping operation of the operator. It can be understood that the rotation angle of the handle 400 from the retracted state to the unfolded state can also be other angles, for example, 45°, 60° or 75°, etc., which can be specifically set according to the actual situation.

[0069] The handle 400 further includes a main body portion 460 connected between the connection end 440 and the free end 420. In the illustrated embodiment, the thickness of the free end 420 is greater than the thickness of the main body portion 460, so that a step 450 is formed at the connection between the main body portion 460 and the free end 420. When the operator grasps the handle 400, the distal phalanx of the operator's thumb contacts the main body portion 460, and the proximal phalanx contacts the free end 420. The step 450 is located between the distal phalanx and the proximal phalanx of the thumb, which conforms to the structure of the thumb and can reduce the slipping phenomenon when the operator grasps. Wherein, the thicknesses of the free end 420 and the main body portion 460 are both the lengths in the thickness direction of the handle 400. The thickness direction of the handle 400 is perpendicular to the length direction L of the handle 400 and perpendicular to the width direction W. In the illustrated embodiment, when the handle 400 is in the retracted state, the free end 420 is closer to the rear end of the housing 420 than the front end of the housing 100, and the step 450 is arranged on the side closer to the housing 100 when the handle 400 is in the retracted state.

[0070] In the illustrated embodiment, a fillet is also provided at the joint of the free end 420 and the main body portion 460, that is, a fillet is provided at the step 450, so that the joint of the free end 420 and the main body portion 460 is smoother, improving the operating feel of the handle 400.

[0071] A groove 461 is further provided on the side of the main body portion 460 in the width direction W. The bottom of the groove 461 can accommodate the index finger of the operator for the operator's index finger to hook the handle 400, thereby further avoiding the slipping phenomenon when the operator grasps and making the design of the handle 400 more ergonomic, further improving the stability of the operator grasping the handle 400. In the illustrated embodiment, the number of the grooves 461 is two, and the two grooves 461 are arranged on both sides of the main body portion 460 along the width direction W. In other embodiments, the number of the grooves 461 can also be one, and the single groove 461 can be arranged on any side of the main body portion 460 along the width direction W.

[0072] Please refer to Figure 1 、 Figure 6 and Figure 7, in order to enable the handle 400 to maintain the unfolded state, it is necessary for the handle 400 to be engaged with the housing 100 when in the unfolded state. The connecting end 440 is provided with a rotating portion 441 and an engaging portion 443. The rotating portion 441 is rotatably connected to the housing 100. The engaging portion 443 can rotate with the rotating portion 441. The housing 100 is provided with a mating portion 132, and the mating portion 132 is arranged on the rotation path of the engaging portion 443, so that the engaging portion 443 can be engaged with the mating portion 132 during the rotation of the handle 400. In the illustrated embodiment, when the handle 400 rotates to the unfolded state, the engaging portion 443 can be engaged with the mating portion 132 to maintain the unfolded state of the handle 400, facilitating the operation of the operator. In other embodiments, the handle 400 can also be engaged with the housing 100 when in the retracted state. For example, the free end 420 is engaged with the rear end of the rotating assembly 200, so that the handle 400 will not unfold relative to the housing 100 when the surgical hole opening device 10 is in the non-working state, which is further conducive to the storage and transportation of the surgical hole opening device 10.

[0073] The rotating portion 441 and the engaging portion 443 extend from the main body portion 460 in a direction away from the free end 420, and the rotating portion 441 and the engaging portion 443 are spaced apart, that is, there is a gap between the rotating portion 441 and the engaging portion 443. The engaging portion 443 has elasticity, so that the engaging portion 443 can undergo elastic deformation and bend relative to the main body portion 460. One end of the engaging portion 443 away from the main body portion 460 can be engaged with the mating portion 132. The mating portion 132 is located on the rotation path of one end of the engaging portion 443 away from the main body portion 460. When the handle 400 rotates to the unfolded state, one end of the engaging portion 443 away from the main body portion 460 is engaged with the mating portion 132 to maintain the unfolded state of the handle 400; since the rotating portion 441 and the engaging portion 443 are spaced apart, and the engaging portion 443 has elasticity, when a force is applied to the part of the handle 400 other than the engaging portion 443 after the mating portion 132 is engaged with the engaging portion 443, the engaging portion 443 undergoes elastic deformation and bends relative to the main body portion 460, so that the force received by one end of the engaging portion 443 away from the main body portion 460 is greatly reduced and is not sufficient to separate the engaging portion 443 from the mating portion 132. That is to say, the rotating portion 441 and the engaging portion 443 are spaced apart, and the engaging portion 443 has elasticity, which can increase the engaging strength between the engaging portion 443 and the mating portion 132 to a certain extent, and prevent the engaging portion 443 from being separated from the mating portion 132 and causing unnecessary rotation of the handle 400 when an external force acts on the handle 400 in the unfolded state.

[0074] Please refer to Figure 8, the engaging portion 443 includes a rod portion 4431 extending from the main body portion 460 in a direction away from the free end 420 and a hook portion 4432 provided at one end of the rod portion 4431 remote from the main body portion 460. In a direction perpendicular to the extending direction of the rod portion 4431, the thickness of the rod portion 4431 is less than the thicknesses of the rotating portion 441 and the main body portion 460, so that the engaging portion 443 has elasticity, and the hook portion 4432 can engage with the engaging portion 132. The engaging portion 443 has elasticity, so that after the hook portion 4432 engages with the engaging portion 132, the two are not easily separated, increasing the engaging strength between the engaging portion 443 and the engaging portion 132. Specifically, the engaging portion 132 is located on the rotation path of the hook portion 4432.

[0075] The hook portion 4432 has a first surface 4433 and a second surface 4434 facing away from the first surface 4433. The rod portion 4431 has a third surface 4435 connected to the first surface 4433. The third surface 4435 is perpendicular to the first surface 4433.

[0076] The engaging portion 132 protrudes from the outer surface 131 of the housing 100. The engaging portion 132 includes a connecting section 1321 and a limiting section 1323 connected to the connecting section 1321. The connecting section 1321 is connected to the housing 100, and the limiting section 1323 extends from a side of the connecting section 1321 remote from the housing 100 in the axial direction of the housing 100 toward the front end of the housing 100, so that the connecting section 1321, the limiting section 1323 and the housing 100 jointly define a limiting cavity 1324. The limiting section 1323 can engage with the hook portion 4432, and when the limiting section 1323 engages with the hook portion 4432, the hook portion 4432 is located in the limiting cavity 1324, and the limiting cavity 1324 can prevent the hook portion 4432 from disengaging, so that the limiting section 1323 stably engages with the hook portion 4432, keeping the handle 400 in an unfolded state.

[0077] The limiting cavity 1324 has spaced and opposite first cavity wall 1324a and second cavity wall 1324b. The first cavity wall 1324a is parallel to the second cavity wall 1324b. The first cavity wall 1324a is the surface of the limiting section 1323, and the second cavity wall 1324b is the outer surface 131 of the housing 100. In the illustrated embodiment, the first cavity wall 1324a and the second cavity wall 1324b are parallel to the axial direction of the housing 100.

[0078] When the limiting section 1323 is engaged with the hook part 4432, the hook part 4432 can be movably received in the limiting cavity 1324. The first surface 4433 can be inclined relative to the first cavity wall 1324a, the second surface 4434 can be in contact with the second cavity wall 1324b, the limiting section 132 can be in contact with the third surface 4435 or the hook part 4432 can be in contact with the first cavity wall 1324a to prevent the hook part 4432 from disengaging from the limiting cavity 1324. The first surface 4433 can also be parallel to and spaced from the first cavity wall 1324a, and when the first surface 4433 is parallel to the first cavity wall 1324a, the second surface 4434 is spaced from the second cavity wall 1324b. That is, when the first surface 4433 is inclined relative to the first cavity wall 1324a and the second surface 4434 is in contact with the second cavity wall 1324b, and the limiting section 132 is in contact with the third surface 4435 or the hook part 4432 is in contact with the first cavity wall 1324a, the hook part 4432 can be stuck in the limiting cavity 1324, thereby preventing the hook part 4432 from disengaging from the limiting cavity 1324; when the first surface 4433 is parallel to the first cavity wall 1324a, the second surface 4434 is spaced from the second cavity wall 1324b, and at this time, by applying an external force to the engaging part 443 (specifically the rod part 4431), the hook part 4432 can be disengaged from the limiting cavity 1324.

[0079] Specifically in the illustrated embodiment, when the extending direction of the rod part 4431 is perpendicular to the axial direction of the housing 100 or parallel to the radial direction of the housing 100, the first surface 4433 is parallel to the first cavity wall 1324a. When the operator grasps the handle 400, due to the influence of gravity, the rod part 4431 rotates with the handle 400 to be inclined relative to the radial direction of the housing 100. At this time, the first surface 4433 is inclined relative to the first cavity wall 1324a, the second surface 4434 is in contact with the second cavity wall 1324b, and at the same time, the limiting section 132 is in contact with the third surface 4435 or the hook part 4432 is in contact with the first cavity wall 1324a to clamp the hook part 4432 in the limiting cavity 1324. Specifically, whether the limiting section 132 is in contact with the third surface 4435 or the hook part 4432 is in contact with the first cavity wall 1324a depends on the direction of the force provided by the operator on the handle 400.

[0080] When the hook part 4432 is located inside the limit cavity 1324 and the first surface 4433 is parallel to the first cavity wall 1324a, the distance between the first surface 4433 and the first cavity wall 1324a is 0.02 mm to 0.05 mm. Define the distance between the first surface 4433 and the first cavity wall 1324a as G2, that is, 0.02 mm ≤ G2 ≤ 0.05 mm. By reserving a certain distance between the first surface 4433 and the first cavity wall 1324a to facilitate the hook part 4432 to be more smoothly engaged into the limit cavity 1324, and setting the distance within the above range, on the basis of facilitating the hook part 4432 to be more smoothly engaged into the limit groove 1324, the swing amplitude of the handle 400 can be reduced. When G2 > 0.05 mm, the handle 400 will have a large swing amplitude when stressed. When G2 < 0.02 mm, it is not conducive to the hook part 4432 being engaged into the limit cavity 1324.

[0081] When the hook part 4432 is located inside the limit cavity 1324 and the first surface 4433 is parallel to the first cavity wall 1324a, the second surface 4434 is parallel to the second cavity wall 1324b. Among them, when the second surface 4434 is parallel to the second cavity wall 1324b, the distance between the second surface 4434 and the second cavity wall 1324b is 0.02 mm to 0.05 mm. Define the distance between the second surface 4434 and the second cavity wall 1324b as G3, that is, 0.02 mm ≤ G3 ≤ 0.05 mm. By reserving a certain distance between the second surface 4434 and the second cavity wall 1324b, it is beneficial for the hook part 4432 to be more smoothly engaged into the limit cavity 1324, and setting the distance within the above range, on the basis of facilitating the hook part 4432 to be more smoothly engaged into the limit groove 1324, the swing amplitude of the handle 400 can be reduced. When G3 > 0.05 mm, the handle 400 will have a large swing amplitude when stressed. When G3 < 0.02 mm, it is not conducive to the hook part 4432 being engaged into the limit cavity 1324.

[0082] In addition, 0.02 mm ≤ G2 ≤ 0.05 mm and 0.02 mm ≤ G3 ≤ 0.05 mm are not only beneficial for the hook part 4432 to be more smoothly engaged into the limit cavity 1324, but also when the hook part 4432 is located in the limit cavity 1324 and the handle is stressed and swings, the hook part 4432 can abut against the first cavity wall 1324a and the second cavity wall 1324 to prevent the hook part 4432 from disengaging from the limit cavity 1324.

[0083] When the handle 400 is not needed, an external force is applied to the engaging part 443 (specifically the rod part 4431) so that the hook part 4432 is separated from the engaging part 132. At this time, the handle 400 can rotate freely relative to the housing 100, and then the handle 400 can be folded up to reduce the occupied space of the surgical hole opening device 10, facilitating the storage and transportation of the surgical hole opening device 10.

[0084] Please refer to Figure 4 , Figure 7 and Figure 8 . On the side of the engaging portion 132 facing away from the housing 100, there is an arc-shaped guiding surface 1325. On the side of the hook portion 4432 facing away from the rod portion 4431, there is an arc-shaped sliding surface 4436. The sliding surface 4436 can slide along the guiding surface 1325 to guide the hook portion 4432 to slide into the limiting cavity 1324. Specifically, the guiding surface 1325 extends from the connecting section 1321 of the engaging portion 132 to the limiting section 1323 and is connected to the first cavity wall 1324a. The sliding surface 4436 is located on the side of the hook portion 4423 facing away from the rod portion 4431 and is connected to both the first surface 4433 and the second surface 4434. Among them, during the unfolding process of the handle 400, the handle 400 rotates relative to the housing 100, and the sliding surface 4436 of the engaging portion 443 slides along the guiding surface 1325, so that the hook portion 4432 of the engaging portion 443 smoothly slides into the limiting cavity 1324. In this way, the engagement operation between the engaging portion 443 and the engaging portion 132 can be facilitated, thereby further facilitating the operation of the surgical opening device 10.

[0085] In other embodiments, the engaging portion 443 can be a buckle, and the engaging portion 132 can be a buckle groove provided on the outer surface 131. When the handle 400 rotates relative to the housing 100, the buckle can be engaged with the buckle groove to limit the buckle, thereby preventing further rotation of the handle 400.

[0086] In the illustrated embodiment, the number of the rotating portions 441 is two. The engaging portion 443 is located between the two rotating portions 441, and the engaging portion 443 is spaced from both of the two rotating portions 441 by a certain distance, which improves the connection stability between the handle 400 and the housing 100 and at the same time improves the rotation stability of the handle 400.

[0087] Please also refer to Figure 5 . Two lugs 134 are further provided on the outer surface 131 of the housing 100. The engaging portion 132 is located between the two lugs 134, and the rotating portion 441 is rotatably connected to the two lugs 134. In this way, when the handle 400 rotates relative to the housing 100, the handle 400 is unfolded and folded by the rotating portion 441 rotating around the lug 134.

[0088] The rotating portion 441 is located between the two lugs 134, which can prevent the rotating portion 441 from being exposed and prevent the rotating portion 441 from scratching the human internal organs when rotating. In the illustrated embodiment, the two rotating portions 441 are located between the two lugs 134. In other embodiments, the two lugs 134 can be located between the two rotating portions 441; or, one of the rotating portions 441 is located between the two lugs 134, and the other rotating portion 441 is located outside the two lugs 134.

[0089] For a more detailed description, the two lugs 134 are respectively defined as a first lug 134a and a second lug 134b. Among them, the first lug 134a is provided with a first hole 1342, the second lug 134b is provided with a second hole 1343, and the first hole 1342 and the second hole 1343 are coaxially arranged.

[0090] Please refer to Figure 2 、 Figure 4 and Figure 5 , the surgical opening device 10 further includes a pin shaft 500. The pin shaft 500 passes through the two rotating parts 441, and both ends of the pin shaft 500 are respectively received in the first hole 1342 and the second hole 1343, so that both ends of the pin shaft 500 are respectively connected to the two lugs 134. In the illustrated embodiment, both ends of the pin shaft 500 are rotatably connected to the two lugs 134, and the rotating part 441 can be fixed to the pin shaft 500. Exemplarily, the pin shaft 500 can be in interference fit, welded or integrally formed with the rotating part 441. In other embodiments, both ends of the pin shaft 500 are respectively fixed to the two lugs 134, and the two rotating parts 441 can rotate relative to the pin shaft 500.

[0091] In the illustrated embodiment, the first hole 1342 is a through hole, and the second hole 1343 is a blind hole, that is, the second hole 1343 does not penetrate the outside of the second lug 134b. In this way, the pin shaft 500 can penetrate into the first hole 1342 from one end of the first lug 134a, pass through the two rotating parts 441, and then penetrate into the second hole 1343, realizing the installation of the handle 400 on the housing 100.

[0092] The lug 134 is further provided with an avoidance groove 1341. The pin shaft 500 passes through the bottom of the avoidance groove 1341, so that the pin shaft 500 can pass through the avoidance groove 1341 to the rotating part 441 of the handle 400 to realize the installation of the handle 400 on the housing 100, and the rotation of the pin shaft 500 will not contact the human internal organs, avoiding scratching the human internal organs. In addition, the setting of the avoidance groove 1341 on the lug 134 also reduces the weight of the surgical opening device 10 to a certain extent, which is further beneficial to the transportation of the surgical opening device 10. Specifically, the first lug 134a is provided with an avoidance groove 1341.

[0093] Please refer to Figure 1 、 Figure 2 and Figure 5 , the housing 100 includes a housing 110, a blade 150 and a mounting seat 130 connected between the housing 110 and the blade 150. The housing 110 is provided with an activity cavity 111. The rotating assembly 200 is rotatably passed through the housing 110, the mounting seat 130 and the blade 150. The handle 400 is rotatably connected to the mounting seat 130. Specifically, the connecting end 440 is rotatably connected to the mounting seat 130. More specifically, the rotating part 441 is rotatably connected to the mounting seat 130.

[0094] The rotating assembly 200 includes a rotating shaft 220 and a rotating member 240. The rotating shaft 220 is axially movable and penetrates the housing 100, and the rotating shaft 220 can rotate relative to the housing 100. The rotating member 240 is disposed at the rear end of the housing 100 and is connected to the rear end of the rotating shaft 220. The cutter head 300 is connected to the front end of the rotating shaft 220. Specifically, the rotating shaft 220 is rotatably penetrated through the housing 110, the mounting seat 130 and the blade 150, one end of the rotating shaft 220 is close to the end of the housing 110 away from the mounting seat 130, and is connected to the rotating member 240, and the other end of the rotating shaft 220 is close to the end of the blade 150 away from the mounting seat 130, and is connected to the cutter head 300. The connection between the handle 400 and the housing 100 is located between the rotating member 240 and the cutting head 300, so that when the handle 400 is folded, the free end 420 of the handle 400 will not extend beyond the rotating member 240 too much, or will not extend beyond the rotating member 240, so that the surgical opening device 10 can have a smaller axial length and a more compact structure, which will not affect the rotation of the rotating assembly 200 and the cutting head 300, and the design is more reasonable, thereby further improving the convenience of operation of the surgical opening device 10 in a smaller space.

[0095] Specifically, the rotating member 240 is fixedly connected to the rotating shaft 220, for example, by screwing, welding or bonding, etc. The cutter head 300 is fixedly connected to the rotating shaft 200, for example, the cutter head 300 can be connected to the front end of the rotating shaft 220 by screwing, welding or bonding, etc.

[0096] The rotating member 240 can rotate, and can also move axially relative to the housing 100. The rotating member 240 can drive the cutter head 300 to rotate and move axially via the rotating shaft 220. When the rotating member 240 moves axially along the housing 100, the rotating member 240 can drive the cutter head 300 to move relative to the housing 100 via the rotating shaft 220, so that the cutter head 300 extends or retracts relative to the housing 100.

[0097] At least when the rotating member 240 moves toward the front end of the housing 100, at least a portion of the rotating member 240 can be sleeved on the outer periphery of the housing 100, so that at least a portion of the rotating member 240 can overlap with the housing 100 in the axial direction of the housing 100, so as to reduce the distance between the rotating member 240 and the front end of the blade head 300, thereby reducing the overall length of the surgical opening device 10. In some embodiments, the opening device 10 is in an initial state (such as Figure 1 , Figure 10 and Figure 11 As shown, the surgical opening device 10 is in a non-working state) and an extended state (as shown Figure 2 and Figure 12As shown, in a working state of the surgical hole opening device 10, at least a part of the rotating member 240 is sleeved on the outer periphery of the housing 100. In some embodiments, in the initial state of the surgical hole opening device 10, the rotating member 240 is not sleeved on the outer periphery of the housing 100; in the extended state, at least a part of the rotating member 240 is sleeved on the outer periphery of the housing 100.

[0098] Please refer to Figure 5 and Figure 6 , the rotating member 240 includes an inner built-in part 241 and an outer turntable 243 connected to the inner built-in part 241. The inner built-in part 241 is connected to the rear end of the rotating shaft 220, and the outer turntable 243 can drive the rotating shaft 220 to rotate and move axially along the housing 100 through the inner built-in part 241. At least when the rotating member 240 moves towards the front end of the housing 100, at least a part of the outer turntable 243 can be sleeved on the outer periphery of the housing 100. In other words, at least when the surgical hole opening device 10 is in the extended state, at least a part of the outer turntable 243 is sleeved on the outer periphery of the housing 100. That is, when the surgical hole opening device 10 is in the extended state, at least a part of the outer turntable 243 can be sleeved on the outer periphery of the housing 100; and when the surgical hole opening device 10 is in the initial state, at least a part of the outer turntable 243 can be sleeved on the outer periphery of the housing 100, or the outer turntable 243 may not be sleeved on the outer periphery of the housing 100.

[0099] In the illustrated embodiment, the surface of the main body portion 460 facing the outer turntable 243 is farther from the outer turntable 243 than the surface of the free end 420 facing the outer turntable 243, so that a substantially "U"-shaped groove is formed on one side of the handle 400 facing the outer turntable 243. In this way, when the handle 400 is folded, it can avoid the outer turntable 243 to a certain extent, so that the handle 400 can be smoothly rotated to the folded state.

[0100] Please also refer to Figure 2 , the outer turntable 243 includes an annular body 2431, and the annular body 2431 is connected to the inner built-in part 241. The operator can apply a rotational force and an axial thrust to the annular body 2431 to realize the rotation and movement of the rotating shaft 220. The annular body 2431 can drive the rotating shaft 220 to rotate and move axially along the housing 100 through the inner built-in part 241. The inner diameter of the annular body 2431 is greater than the outer diameter of the rear end of the housing 100, so that when the outer turntable 243 moves towards the front end of the housing 100, at least a part of the annular body 2431 can be sleeved on the outer periphery of the housing 100. The central axis of the annular body 2431 coincides with the central axis of the rotating shaft 220, so that when the outer turntable 243 moves towards the front end of the housing 100 and rotates relative to the housing 100, the outer turntable 243 will not deviate from the central axis of the rotating shaft 220, so that the movement of the outer turntable 243 is more stable, and the accuracy of hole opening of the surgical hole opening device 10 is improved.

[0101] In one embodiment, an anti-slip portion 2432 is provided on the outer wall of the annular body 2431, and the anti-slip portion 2432 can be used for the operator to grip. The provision of the anti-slip portion 2432 can reduce the rotational slip of the rotating member 240 and improve the reliability of the operation.

[0102] In this embodiment, the anti-slip portion 2432 is an anti-slip protrusion. Further, the number of the anti-slip portions 2432 is multiple, and the multiple anti-slip portions 2432 are arranged at intervals along the circumferential direction of the rotating member 240. Of course, in other embodiments of the present application, the anti-slip portion 2432 can also be an anti-slip stripe, an anti-slip groove, and the like.

[0103] Please refer to Figure 6 , the outer turntable 243 further includes a guiding portion 2433 connected to the annular body 2431. The guiding portion 2433 extends axially along the front end of the annular body 2431 along the outer shell 100, and the guiding portion 2433 can slide along the outer wall of the outer shell 100. The provision of the guiding portion 2433 can guide the rotating member 240 when the rotating member 240 moves axially, so that the movement of the rotating member 240 is smoother.

[0104] In the illustrated embodiment, the guiding portion 2433 is annular, and the guiding portion 2433 is slidably sleeved on the rear end of the outer shell 100. In other words, in the initial state of the surgical opening device 10, the guiding portion 2433 is sleeved on the rear end of the outer shell 100. On the one hand, the guiding portion 2433 can better guide the axial movement of the rotating member 240 along the outer shell 100, ensuring that the rotating member 240 can move smoothly and accurately towards the front end of the outer shell 100 and avoiding misalignment. On the other hand, the guiding portion 2433 is sleeved on the rear end of the outer shell 100, and at least part of the rotating member 240 is always axially coincident with the outer shell 100, reducing the distance between the rotating member 240 and the front end of the cutter head 300, and thus reducing the overall length of the surgical opening device 10.

[0105] The guiding portion 2433 is coaxially arranged with the annular body 2431, and the central axis of the annular body 2431 coincides with the central axis of the rotating shaft 220. Thus, the guiding portion 2433 is also coaxially arranged with the rotating shaft 220. The inner wall of the guiding portion 2433 is attached to the outer wall of the rear end of the outer shell 100 to guide the movement and rotation of the rotating member 240, facilitating the smooth movement and rotation of the rotating member 240 relative to the outer shell 100, and thus facilitating the smooth movement and rotation of the cutter head 300. Specifically, the guiding portion 2433 is slidably sleeved on the end of the housing 110 away from the mounting seat 130; the inner wall of the guiding portion 2433 is attached to the outer wall of the housing 110. In other embodiments, the guiding portion 2433 can also be multiple extending portions that surround the outer periphery of the front end of the outer shell 100 and extend axially. The multiple extending portions are arranged at intervals, and the multiple extending portions can slide axially along the outer wall of the outer shell 100.

[0106] See also Figures 9 to 11 The rotating shaft 220 includes a shaft 221 and a sliding member 223 connected to the rear end of the shaft 221. The shaft 221 is rotatably disposed through the mounting seat 130 and the blade body 150, and the rear end of the shaft 221 is accommodated in the housing 110, and the front end of the shaft 221 is close to the front end of the blade body 150 and connected to the blade head 300. The rear end of the shaft 221 is accommodated in the active cavity 111.

[0107] The sliding member 223 is disposed at one end of the shaft 221; the end of the shaft 221 that is away from the sliding member 223 extends from the blade 150 and is connected to the blade head 300. The sliding member 223 is fixedly connected to the built-in portion 241 of the rotating member 240. Specifically, the sliding member 223 is located at the end of the housing 110 that is away from the mounting seat 130 and is connected to the built-in portion 241. The sliding member 223 is at least partially accommodated in the active cavity 111, and the sliding member 223 can slide along the cavity wall of the active cavity 111. That is, the sliding member 223 is slidably arranged in the housing 110 and can slide along the inner wall of the housing 110. In this embodiment, when the blade head 300 is extended relative to the housing 100, the sliding member 223 is completely accommodated in the active cavity 111; when the blade head 300 is retracted relative to the housing 100, a part of the sliding member 223 is accommodated in the active cavity 111, and the other part is located outside the active cavity 111. In other embodiments, the sliding member 223 can be always accommodated in the active cavity 111. At least one of the built-in portion 241 and the sliding member 223 can be inserted into the opening 113. In this embodiment, the built-in portion 241 and the sliding member 223 are both inserted into the opening 113. In other embodiments, one of the built-in portion 241 and the sliding member 223 is inserted into the opening 113, and the other is not inserted into the opening 113.

[0108] In this embodiment, the sliding member 223 and the shaft 221 are an integral structure to improve the connection strength between the sliding member 223 and the shaft 221. In other embodiments, the sliding member 223 and the shaft 221 may be independent structures, and the two may be connected by welding or bonding.

[0109] When the rotating member 240 drives the sliding member 223 and the shaft rod 221 to move axially, the sliding of the sliding member 223 along the cavity wall of the movable cavity 111 can guide the movement of the cutter head 300, prevent the cutter head 300 from moving radially, so that the cutter head 300 can accurately drill a hole in the target part and avoid deviation as much as possible. When the rotating member 240 moves axially along the housing 100, the cutter head 300 extends or retracts relative to the tool body 150. The extension of the cutter head 300 relative to the tool body 150 allows the cutter head 300 to extend into the right atrium. When the cutter head 300 extending into the right atrium retracts relative to the tool body 150, the cutter head 300 can cooperate with the tool body 150 to clamp the target tissue. After clamping the target tissue, by rotating the rotating member 240, the sliding member 223 can be driven to rotate along the inner wall of the housing 110, and then the shaft rod 221 can drive the cutter head 300 to rotate synchronously to realize the cutting of the target tissue.

[0110] Please continue to refer to Figures 4 to 6 , a part of the rotating shaft 220 is received in the movable cavity 111, and at least one of the rotating shaft 220 and the built-in part 241 can pass through the opening 113. In this way, without increasing the overall length of the surgical hole-opening device 10 extending, the movable stroke of the rotating member 240 in the axial direction is increased, and the extension length of the cutter head 300 relative to the housing 100 is increased, so that the cutter head 300 and the housing 100 can cooperate to clamp a thicker target tissue together, expanding the applicable range of the surgical hole-opening device 10.

[0111] The movable cavity 111 and the opening 113 are located in the housing 110. The front end of the housing 110 is closed by the mounting seat 130, so that one end of the movable cavity 111 is closed and the other end is open.

[0112] The mounting seat 130 is a mounting carrier to realize the mounting of the housing 110 and the tool body 150. The mounting seat 130 can also be used for the mounting of the handle 400. Specifically, the lug 134 is provided on the mounting seat 130 for the mounting of the handle 400. The mounting seat 130 has a mounting hole 136, and the mounting hole 136 communicates with the movable cavity 111. The rotating shaft 220 can rotate and slidably pass through the mounting hole 136. Specifically, the shaft rod 221 passes through the mounting hole 136. The aperture of the mounting hole 136 is smaller than the inner diameter of the housing 110, that is, the aperture of the mounting hole 136 is smaller than the diameter of the movable cavity 111.

[0113] One end of the tool body 150 is connected to the mounting seat 130, and the other end can cooperate with the cutter head 300 to clamp the target tissue.

[0114] A stop portion 160 is provided at the rear end of the housing 100. The stop portion 160 can abut against the rear end of the rotating shaft 220 to limit the rotating shaft 220 and prevent the rotating shaft 220 from disengaging from the rear end of the housing 100. The stop portion 160 protrudes from the wall of the movable cavity 111 and encloses an opening 113. Specifically, the stop portion 160 is provided at one end of the housing 110 away from the mounting base 130. The stop portion 160 is provided at the edge of the housing 110 and extends toward the inner side of the housing 110. One side of the sliding member 223 facing away from the shaft rod 221 can abut against the stop portion 160 to limit the rotating shaft 220 and prevent the rotating shaft 220 from disengaging from the opening 113 out of the movable cavity 111.

[0115] In an embodiment of the present application, the stop portion 160 is a flanging extending inwardly of the housing 110, and the stop portion 160 is annular. Of course, in other embodiments of the present application, the stop portion 160 may also be a plurality of protruding portions. The plurality of protruding portions are arranged at intervals around the rotating shaft 220 at the rear end of the housing 110. The plurality of protruding portions can all abut against the rear end of the rotating shaft 220 to meet the requirement of being able to limit the rotating shaft 220 and prevent the rotating shaft 220 from disengaging from the housing 110.

[0116] The rotating member 240 is a component for the operator to operate. The operator applies a rotational force and an axial thrust to the rotating member 240 to realize the rotation and movement of the rotating shaft 220. A receiving gap 240a for receiving the outer wall of the rear end of the housing 100 is formed between the inner portion 241 and the outer turntable 243 of the rotating member 240. When the rotating member 240 moves in the direction close to the front end of the housing 100, the shell wall at the rear end of the housing 100 can be received in the receiving gap 240a to avoid interference between the rotating member 240 and the housing 100, so that at least a part of the rotating member 240 and the housing 100 can be axially coincident in the extended state. Specifically, the housing at one end of the housing 110 away from the mounting base 130 can be received in the receiving gap 240a.

[0117] Please refer to Figure 6 、 Figure 9 、 Figure 11 and Figure 12 , the rotating member 240 further includes a connecting portion 245. The connecting portion 245 connects the inner portion 241 and the outer turntable 243 to realize the fixed connection between the inner portion 241 and the outer turntable 243. There is a preset distance between the outer turntable 243 and the inner portion 241. The connecting portion 245 extends along the radial direction of the rotating shaft 220. The two ends of the connecting portion 245 are respectively connected to the inner portion 241 and the outer turntable 243. This preset distance is the length of the connecting portion 245 in the radial direction of the rotating shaft 220. Specifically, the connecting portion 245 is fixedly connected to the ring body 2431 and the inner portion 241 respectively.

[0118] Specifically, there are multiple connecting parts 245, and the multiple connecting parts 245 are arranged at intervals along the outer periphery of the built-in part 241. In this embodiment, the number of the connecting parts 245 is two, and the two connecting parts 245 are arranged at both ends of the built-in part 241 along the radial direction. In other embodiments, the number of the connecting parts 245 may also be one, three or more than three. The specific number of the connecting parts 245 can be set according to the actual situation.

[0119] In one embodiment, the connecting part 245 is substantially rod-shaped. For example, the connecting part 245 can be a round rod-shaped or square rod-shaped structure. In other embodiments, the cross-section of the connecting part 245 can also have a structure similar to an "L" shape, that is, the connecting part 245 can first extend axially for a certain distance from the rear end of the built-in part 241 and then extend radially. Or in some embodiments, the connecting part 245 extends obliquely along the axis of the housing 100 or obliquely radially relative to the rotating shaft 220. Or, in some embodiments, the connecting part 245 is an annular or hollow disk-shaped structure, the connecting part 245 has an inner ring and an outer ring, the inner ring of the connecting part 245 is fixedly connected to the built-in part 241, and the outer ring is fixedly connected to the outer turntable 243. The structure of the connecting part 245 only needs to meet the purpose of the fixed connection between the built-in part 241 and the outer turntable 243.

[0120] Wherein, a chute 115 extending along the axis of the housing 100 is formed on the housing 100. When the rotating member 240 moves towards the front end of the housing 100, the connecting part 245 can slide along the chute 115. In the illustrated embodiment, the chute 115 extends along the axis of the housing 100 from the end of the rear end of the housing 100, that is, the chute 115 penetrates through one end of the housing 110 facing the rotating member 240 and extends along the axis of the housing 100. The position of the chute 115 can correspond to the position of the connecting part 245 in the axial direction of the housing 100. When the rotating member 240 moves towards the front end of the housing 100, the connecting part 245 can slide into the chute 115 and slide along the chute 115. In the initial state of the surgical hole opening device 10, the connecting part 245 is located outside the chute 115, and the position of the connecting part 245 corresponds to the position of the chute 115 in the axial direction of the housing 100; when the rotating member 240 moves towards the front end of the housing 100, the connecting part 245 slides along the chute 115.

[0121] There are multiple corresponding connection parts 245 for the sliding groove 115, that is, the number of the sliding groove 115 and the connection part 245 is equal, and each sliding groove 115 corresponds to a connection part 245, so that when the rotating part 240 moves towards the front end of the outer shell 100, each connection part 245 can slide along the corresponding sliding groove 115. On the one hand, it can realize the connection between the built-in part 241 and the outer turntable 243 while avoiding the limitation of the axial movement distance of the outer shell 100 caused by the existence of the connection part 245. On the other hand, the sliding of the connection part 245 along the sliding groove 115 can also play a certain guiding role in the axial movement of the rotating part 240. And compared with the connection part 245 in the form of an annular or hollow disc structure, connecting the built-in part 241 and the outer turntable 243 through multiple spaced connection parts 245 can reduce the weight of the surgical opening device 10 to a certain extent.

[0122] The sliding groove 115 is not limited to the above structure. In some embodiments, the sliding groove 115 may not penetrate through one end of the housing 110 facing the rotating part 240, that is, the sliding groove 115 is a closed groove body. At this time, in order to facilitate the rotation of the rotating part 240 to drive the rotating shaft 220 to rotate to achieve the cutting purpose, an extension groove extending in the circumferential direction may be opened on the rear end of the outer shell 100. That is, in some embodiments, the connection part 245 penetrates through the sliding groove 115 in the radial direction of the rotating shaft 220, and the connection part 245 can abut against the rear end groove wall of the sliding groove 115 to prevent the rotating part 240 from separating from the outer shell 100. An extension groove extending in the circumferential direction of the outer shell 100 is opened on the rear end of the outer shell 100, and the extension groove communicates with the end of the rear end of the sliding groove 115, and the connection part 245 can also slide along the extension groove.

[0123] The outer shell 100 is provided with a clamping groove 117, and the clamping groove 117 extends in the circumferential direction of the rotating shaft 220, and the clamping groove 117 communicates with the sliding groove 115. Specifically, the clamping groove 117 communicates with one end of the sliding groove 115 facing away from the rotating part 240. After the connection part 245 can slide along the sliding groove 115, it slides into the clamping groove 117 and engages with the clamping groove 117, so as to realize the clamping connection between the rotating part 240 and the housing 110.

[0124] That is to say, when the rotating part 240 drives the tool head 300 to extend out, the connection part 245 can first move axially along the sliding groove 115, and then rotate the rotating part 240, and the connection part 245 moves radially, so that the connection part 245 moves from the sliding groove 115 into the clamping groove 117 to realize the clamping connection between the rotating part 240 and the housing 110, so that the tool head 300 remains in the extended state.

[0125] The blade body 150 can cooperate with the cutter head 300 to clamp the target tissue. A first cutting edge 151 is provided at the front end of the blade body 150, that is, the first cutting edge 151 is arranged at one end of the blade body 150 facing the cutter head 300, and the blade body 150 and the cutter head 300 clamp the target tissue together through the first cutting edge 151. The first cutting edge 151 is the foremost end of the outer shell 100, that is, G1 is the axial spacing of the connecting end 440 of the first cutting edge 151 and the handle 400 along the outer shell 100. The first cutting edge 151 is annular. The cutter head 300 is arranged at the front end of the first cutting edge 151. A second cutting edge 310 is provided at the rear end of the cutter head 300, and the first cutting edge 151 and the second cutting edge 310 can cooperate to clamp the target tissue. That is, the cutting state refers to the state in which the surgical opening device 10 cuts the target tissue when the target tissue is clamped between the first cutting edge 151 and the second cutting edge 310. Specifically, when the rotating member 240 drives the cutter head 300 to extend and then retract relative to the blade body 150 through the rotating shaft 220, the first cutting edge 151 can cooperate with the second cutting edge 310 of the blade body 150 to clamp the target tissue, facilitating subsequent cutting of the target tissue by rotating the cutter head 300.

[0126] Please continue to refer to Figure 10 and Figure 11 In one embodiment, the maximum distance from the rear end of the rotating member 240 to the front end of the cutter head 300 is h, that is, the length of the surgical opening device 10 along the axis of the outer shell 100 is h, and the maximum diameter of the first cutting edge 151 is d, where 3 ≤ h / d ≤ 5. After the dimensional relationship between the overall length of the surgical opening device 10 and the first cutting edge 151 is within the above range, it can make the first cutting edge 151 shorten the length of the surgical opening device 10 as much as possible on the basis of the unchanged maximum diameter, so that the surgical opening device 10 can be applied to a narrow operating space. When h / d < 3, the length of the surgical opening device 10 is too short, which is not convenient for cutting operations; when h / d > 5, the length of the surgical opening device 10 will increase, resulting in the surgical opening device 10 being unable to be applied to a narrow operating space and easily hitting other organs such as the lungs.

[0127] In one embodiment, the front end of the cutter head 300 is a cutting tip 320, that is, the cutting tip 320 is arranged at the end of the cutter head 300 facing away from the housing 110. That is to say, the bottom of the cutter head 300 is the cutting tip 320, and the cutter head 300 penetrates into the right atrium by pushing open the atrial wall of the right atrium through the cutting tip 320.

[0128] In one embodiment, the knife tip 320 is conical, and the angle between the axis I of the knife tip 320 and the generatrix II is θ, wherein 30°≤θ≤60°. Since the thickness of the atrial wall is thinner than that of the ventricular wall, the knife tip 320 does not need to be too sharp, and the knife head 300 can be pushed open the atrial wall of the right atrium. When the angle θ between the axis I and the generatrix II of the conical knife tip 320 satisfies the above range (30°≤θ≤60°), the length of the knife head 300 can be shorter on the basis of the maximum diameter of the first blade 151 being unchanged, so as to avoid the knife head 300 from damaging the atrial septum as much as possible. When θ is less than 30°, the knife tip 320 will be too sharp and easily hit the atrial septum. When θ is greater than 60°, the length of the knife tip 320 is too short to cut the atrial wall, and it is not convenient for the knife head 300 to extend into the right atrium.

[0129] Please also read Figure 6 and Figure 9 The surgical opening device 10 further includes an elastic member 600. The elastic member 600 is sleeved on the rotating shaft 220 and accommodated in the housing 100, and the two ends of the elastic member 600 are respectively in contact with the housing 100 and the rotating shaft 220. The elastic member 600 can provide elastic force to the rotating shaft 220, and the elastic force can make the cutting head 300 connected to the rotating shaft 220 have a tendency to move toward the housing 100, and can make the cutting head 300 cooperate with the front end of the housing 100 to clamp the target tissue.

[0130] The elastic member 600 is sleeved on the shaft 221 and is located in the housing 110. The two ends of the elastic member 600 respectively abut against the edges of the sliding member 223 and the mounting hole 136 of the mounting seat 130. Specifically, one end of the elastic member 600 away from the sliding member 223 abuts against the edge of the mounting hole 136 of the mounting seat 130. When the rotating member 240 is pushed to extend the cutter head 300 relative to the blade body 150, the sliding member 223 acts on the elastic member 600, causing the elastic member 600 to deform and be compressed between the sliding member 223 and the mounting seat 130. When the rotating member 240 is released, since the position of the mounting seat 130 is fixed, the mounting seat 130 can provide support for the elastic member 600, and the elastic member 600 deforms and recovers and provides elastic force. The elastic force of the elastic member 600 can push the sliding member 223 to slide in a direction away from the mounting seat 130, and the shaft 221 slides with the sliding member 223 to drive the cutter head 300 to move in a direction close to the blade body 150, so that the cutter head 300 is retracted relative to the blade body 150. Specifically, one end of the elastic member 600 away from the mounting seat 130 abuts against a side of the sliding member 223 away from the stopper 160.

[0131] The elastic force provided by the elastic member 600 can push the sliding member 223, causing the cutter head 300 to retract towards the cutter body 150, so that the surgical opening device 10 returns to the initial state. At this time, the rotating shaft 220, the cutter head 300 and the rotating member 240 are all in their initial positions. When the elastic force of the elastic member 600 pushes the sliding member 223 back to the initial position, the stop portion 160 abuts against the sliding member 223, which can limit the position of the rotating shaft 220 and prevent the rotating shaft 220 from disengaging from the housing 100 under the action of the reset elastic force of the elastic member 600. When the rotating member 240 drives the cutter head 300 to extend through the rotating shaft 220, the rotating member 240 can overcome the resistance of the elastic member 600, press against the elastic member 600 through the sliding member 223 to compress the elastic member 600. At this time, the sliding member 223 drives the cutter head 300 to extend through the shaft rod 221, and the surgical opening device 10 is in the extended state.

[0132] After the cutter head 300 extends into the right atrium, the rotating member 240 can be released to reset the elastic member 600. The elastic force generated by the recovery of the elastic member 600 can push the sliding member 223 to reset. Furthermore, the sliding member 223 drives the shaft rod 221, the cutter head 300 and the rotating member 240 back to the initial position, so that the cutter head 300 retracts relative to the housing 110. Furthermore, the target tissue can be clamped between the cutter head 300 and the housing 110, which is convenient for later cutting the target tissue through the cutter head 300. Optionally, the elastic member 600 is a spring, an elastic sleeve, etc.

[0133] In order to maintain the extended state of the cutter head 300, the rotating member 240 can be clamped with the housing 110. After the rotating member 240 drives the cutter head 300 to extend through the rotating shaft 220, the rotating member 240 is rotated so that the rotating member 240 is clamped in the housing 110, thereby keeping the cutter head 300 in the extended state. In this way, after the operator clamps the rotating member 240 with the housing 110, the cutter head 300 remains in the extended state, and the cutter head 300 can be extended into the right atrium to avoid the elastic force of the elastic member 600 from resetting the rotating member 240 and the cutter head 300.

[0134] Since one end of the elastic member 600 away from the sliding member 223 needs to abut against the mounting seat 130, and the rotating shaft 220 also needs to pass through the mounting seat 130, the diameter of the mounting hole 136 is set to be smaller than the diameter of the movable cavity 111, so that the edge of the mounting hole 136 can provide support for one end of the elastic member 600 away from the sliding member 223, and at the same time the mounting hole 136 can allow the rotating shaft 220 to pass through.

[0135] To facilitate the assembly of the surgical opening device 10 with the above structure, at least the housing 110 and the mounting base 130 are of a split structure. By setting the housing 110 and the mounting base 130 as a split structure, when assembling the rotating shaft 220, the outer shell 100, and the elastic member 600, the rear end of the rotating shaft 220 can be inserted into the housing 110 (or the moving cavity 111) from the front end of the housing 110. The rear end of the rotating shaft 220 (specifically, the sliding member 223) abuts against the stop portion 160 to prevent the rotating shaft 220 from disengaging from the rear end (i.e., the opening 113) of the housing 110. Then, the elastic member 600 is sleeved on the rotating shaft 220 in sequence, the rotating shaft 220 is inserted through the mounting hole 136 of the mounting base 130, and the housing 110 is fixedly connected to the mounting base 130, thereby limiting the rotating shaft 220 and the elastic member 600 within the housing 110, and realizing the assembly of the rotating shaft 220, the outer shell 100, and the elastic member 600.

[0136] Of course, when assembling the elastic member 600, the elastic member 600 is not limited to being installed on the rotating shaft 220 after the rotating shaft 220 is inserted into the housing 110, and it can also be sleeved on the rotating shaft 220 before the rotating shaft 220 is inserted into the housing 110. Among them, the housing 110 can be fixed to the mounting base 130 by means of fasteners, threaded connection, etc. The blade body 150 can be provided separately from the mounting base 130 or can be an integral structure with the mounting base 130. When the blade body 150 is of a split structure with the mounting base 130, it can be fixed together by means of fastener connection or threaded connection.

[0137] After the elastic member 600 is provided in the surgical opening device 10, due to the elastic force provided by the elastic member 600, when the surgical opening device 10 is in the initial state, the cutter head 300 can be adjacent to the front end of the outer shell 100. When the surgical opening device 10 is in the extended state, if there is no external force, the cutter head 300 can move towards the direction close to the outer shell 100 under the action of the elastic force.

[0138] Taking the right atrium as an example, the working process of the surgical opening device 10 of the present application is as follows:

[0139] First, a cross incision is made on the right atrium through a common cutting tool currently. Then, the operator can push the rotating member 240 to move relative to the housing 110. At this time, the rotating member 240 compresses the elastic member 600 so that the cutter head 300 extends relative to the blade body 150. Then, rotate the rotating member 240 to engage the rotating member 240 with the housing 110 to maintain the extended state of the cutter head 300. Or, first, the operator can push the rotating member 240 to move relative to the housing 110 so that the cutter head 300 extends relative to the blade body 150, and rotate the rotating member 240 to engage the rotating member 240 with the housing 110 to maintain the extended state of the cutter head 300.

[0140] Subsequently, align the cutter head 300 with the cross incision on the right atrium and insert the cutter head 300 into the right atrium. Then, rotate the rotating member 240 to disengage the rotating member 240 from the housing 110. The elastic member 600 resets and pushes the rotating member 240 to reset, thereby driving the cutter head 300 to retract. At this time, the target tissue is clamped between the first blade 151 and the second blade 310. Subsequently, rotate the rotating member 240 to cut the target tissue. The cut target tissue remains in the space between the cutter head 300 and the tool body 150. Finally, take out the surgical opening device 10 from the body, and the cut target tissue is taken out together to complete the opening operation of the right atrium.

[0141] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0142] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A surgical opening device, characterized in that, Comprising: A housing; A rotating assembly, which is disposed through the housing and is capable of rotating relative to the housing and moving axially along the housing; A cutter head, which is disposed at the front end of the housing, and the cutter head is connected to the front end of the rotating assembly, and the cutter head is capable of rotating with the rotating assembly and moving axially along the housing; And A handle, which has an opposite free end and a connecting end, the connecting end is connected to the housing, and the handle has an unfolded state and a folded state. Compared with the folded state, in the unfolded state, the free end is farther away from the housing in the radial direction of the housing.

2. The surgical opening device according to claim 1, wherein The surgical hole-opening device has a cutting state. In the cutting state, the axial distance between the cutter head and the connecting end of the handle along the housing is 8 mm to 15 mm; and / or, the free end can be grasped by an operator.

3. The surgical aperture device according to claim 1, wherein, The connecting end is rotatably connected to the housing, and the rotation axis of the handle is perpendicular to the axial movement direction of the rotating assembly.

4. The surgical opening device according to claim 1, wherein The connecting end is provided with a rotating portion and an engaging portion. The rotating portion is rotatably connected to the housing, and the engaging portion can rotate with the rotating portion; the housing is provided with a cooperating portion, and the cooperating portion is disposed on the rotation path of the engaging portion. When the handle rotates to the unfolded state, the engaging portion can be engaged with the cooperating portion to maintain the unfolded state of the handle.

5. The surgical opening device according to claim 4, characterized in that, The handle further includes a main body portion connected between the connecting end and the free end. The rotating portion and the engaging portion extend from the main body portion in a direction away from the free end. The rotating portion and the engaging portion are spaced apart. The engaging portion has elasticity, and the end of the engaging portion away from the main body portion can be engaged with the cooperating portion.

6. The surgical opening device according to claim 5, characterized in that, The engaging portion includes a rod portion extending from the main body portion in a direction away from the free end and a hook portion disposed at the end of the rod portion away from the main body portion. In a direction perpendicular to the extending direction of the rod portion, the thickness of the rod portion is smaller than the thicknesses of the rotating portion and the main body portion, so that the engaging portion has elasticity, and the hook portion can be engaged with the cooperating portion.

7. The surgical opening device according to claim 6, wherein The cooperating portion includes a connecting section and a limiting section connected to the connecting section. The connecting section is connected to the housing, and the limiting section extends from the side of the connecting section away from the housing in the axial direction of the housing towards the front end of the housing, so that the connecting section, the limiting section and the housing jointly define a limiting cavity. The limiting section can be hooked with the hook portion, and when the limiting section is hooked with the hook portion, the hook portion is located in the limiting cavity, and the limiting cavity can prevent the hook portion from disengaging.

8. The surgical opening device according to claim 7, wherein The limiting cavity has spaced and opposite first and second cavity walls, the first cavity wall is parallel to the second cavity wall, the first cavity wall is the surface of the limiting section, the second cavity wall is the outer surface of the housing, the hook portion has a first surface and a second surface facing away from the first surface, the rod portion has a third surface connected to the first surface, the third surface is perpendicular to the first surface. When the limiting section is engaged with the hook portion, the hook portion can be movably received in the limiting cavity, the first surface can be inclined relative to the first cavity wall, the second surface can abut against the second cavity wall, the limiting section can abut against the third surface or the hook portion can abut against the first cavity wall to prevent the hook portion from disengaging from the limiting cavity. The first surface can also be parallel and spaced from the first cavity wall, and when the first surface is parallel to the first cavity wall, the second surface is spaced from the second cavity wall.

9. The surgical hole opening device according to claim 8, wherein, When the hook portion is located in the limiting cavity and the first surface is parallel to the first cavity wall, the second surface is parallel to the second cavity wall, wherein: The distance between the first surface and the first cavity wall is 0.02 mm to 0.05 mm; and / or The distance between the second surface and the second cavity wall is 0.02 mm to 0.05 mm.

10. The surgical opening device according to claim 7, wherein, On the side of the engaging portion facing away from the housing, there is an arc-shaped guiding surface, and on the side of the hook portion facing away from the rod portion, there is an arc-shaped sliding surface, and the sliding surface can slide along the guiding surface to guide the hook portion to slide into the limiting cavity.

11. The surgical opening device according to claim 5, characterized in that, The number of the rotating portions is two, the engaging portion is located between the two rotating portions, and the engaging portion is spaced from both of the two rotating portions by a certain distance; And / or, there are also two lugs provided on the outer surface of the housing, the engaging portion is located between the two lugs, the rotating portion is rotatably connected to the two lugs, and the rotating portion is located between the two lugs.

12. The surgical hole opening device according to claim 1, characterized in that The housing includes a housing body, a blade body and a mounting seat connected between the housing body and the blade body. The blade body can cooperate with the blade head to clamp the target tissue. The mounting seat has a mounting hole, and the aperture of the mounting hole is smaller than the inner diameter of the housing body; the rotating assembly includes a rotating shaft and a rotating member. The rotating shaft can axially move through the housing, and the rotating shaft includes a shaft rod and a sliding member connected to the rear end of the shaft rod. The shaft rod passes through the mounting hole of the mounting seat and the blade body, and the rear end of the shaft rod is received in the housing body. The front end of the shaft rod is close to the front end of the blade body and is connected to the blade head. The sliding member is connected to the rotating member; the opening device further includes an elastic member. The elastic member is sleeved on the shaft rod and is located in the housing body. The two ends of the elastic member respectively abut against the sliding member and the edge of the mounting hole of the mounting seat. Among them, the connecting end is rotatably connected to the mounting seat.

13. The surgical opening device according to claim 1, wherein The rotating assembly includes a rotating shaft and a rotating member. The rotating shaft is axially movably disposed through the housing. The rotating member includes an inner portion and an outer turntable connected to the inner portion. Among them, the inner portion is connected to the rear end of the rotating shaft, and the outer turntable can drive the rotating shaft to rotate and axially move along the housing through the inner portion. At least when the rotating member moves in the direction close to the front end of the housing, at least part of the outer turntable can be sleeved on the outer periphery of the housing.

14. The surgical opening device according to claim 13, wherein, The outer turntable includes a ring body. The ring body is connected to the inner portion. The ring body can drive the rotating shaft to rotate and axially move along the housing through the inner portion. The inner diameter of the ring body is larger than the outer diameter of the rear end of the housing, so that at least part of the ring body can be sleeved on the outer periphery of the housing when the outer turntable moves in the direction close to the front end of the housing.

15. The opening device according to claim 14, characterized in that, The outer turntable further includes a guiding portion connected to the ring body. The guiding portion extends axially along the housing from the front end of the ring body, and the guiding portion can slide along the outer wall of the housing.

16. The punching device according to claim 13, characterized in that, A receiving gap for receiving the outer wall of the rear end of the housing is formed between the inner portion and the outer turntable. When the rotating member moves in the direction close to the front end of the housing, the housing wall at the rear end of the housing can be received in the receiving gap. And / or, the rotating member further includes a connecting portion that connects the inner portion and the outer turntable. A sliding groove extending axially along the housing is formed on the housing. When the rotating member moves in the direction close to the front end of the housing, the connecting portion can slide along the sliding groove.

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