CN112617978A

CN112617978A - Hole opening device

Info

Publication number: CN112617978A
Application number: CN202011430853.0A
Authority: CN
Inventors: 谢端卿; 余顺周
Original assignee: Shenzhen Core Medical Technology Co Ltd
Current assignee: Shenzhen Core Medical Technology Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-04-09

Abstract

The application belongs to the technical field of medical equipment, and particularly relates to a tapping device which comprises a knife cylinder, a connecting shaft, a knife head and a locking mechanism, wherein the connecting shaft penetrates through the knife cylinder and can slide in the axial direction of the knife cylinder; the locking mechanism is arranged on the knife cylinder and can automatically lock the connecting shaft when the knife head slides to a locking position so as to prevent the connecting shaft from sliding in the axial direction of the knife cylinder. Because locking mechanism can slide the automatic locking of connecting axle when locking position at the tool bit, and need not other operations, can simplify the operation of trompil device, reduced the operation degree of difficulty, it is more convenient simple to use. After the cutter head is maintained at the locking position, an operator can directly hold the hole opening device through a single hand, observation of the operator can be facilitated, and smooth operation is guaranteed.

Description

Hole opening device

Technical Field

The application belongs to the technical field of medical equipment, especially, relate to a trompil device.

Background

The biological tissue is often perforated in surgical operations, for example, the heart is perforated in the installation operation of a ventricular assist pump, wherein when the ventricular assist pump is specifically installed, a top ring for fixing the ventricular assist pump is usually installed on the heart, then the heart is perforated at the middle part of the top ring by a perforating device, and finally, after an inlet pipe of the ventricular assist pump is inserted into the heart, the top ring fixedly clamps the ventricular assist pump, so that the installation of the ventricular assist pump is completed.

However, the current perforating device is difficult to operate, and the top ring is easy to cut during perforating, so that the smooth operation is affected, and the operation fails.

Disclosure of Invention

The application aims to provide a hole opening device which can reduce operation risks and operation difficulty.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: an aperturing device, comprising:

a knife cylinder;

the connecting shaft penetrates through the cutter barrel and can slide in the axial direction of the cutter barrel;

the cutter head is connected with one end of the connecting shaft, is positioned outside the cutter barrel and can slide along with the connecting shaft, and a locking position is arranged on the cutter head relative to the cutter barrel in the axial direction of the cutter barrel; and

and the locking mechanism is arranged on the knife cylinder and can automatically lock the connecting shaft when the knife head slides to the locking position so as to prevent the connecting shaft from sliding in the axial direction of the knife cylinder.

Optionally, be equipped with the joint arch on the axle wall of connecting axle, the joint is protruding to be followed the connecting axle is in the axial of tool bit is slided, locking mechanism includes:

the first elastic piece can provide elastic force for the connecting shaft to promote the connecting shaft to slide towards the direction departing from the cutter head; and

the locking piece can the tool bit be located when the locking position with the bellied deviating from of joint one side butt of tool bit to the prevention the connecting axle is towards deviating from the direction of tool bit slides, so that the locking piece can with first elastic component stops jointly the connecting axle is in the axial of a section of thick bamboo slides, and the locking the connecting axle.

Optionally, the locking piece is provided with a locking part, the locking part can be abutted against one side of the clamping protrusion, which is far away from the tool bit, so as to prevent the connecting shaft from sliding in a direction far away from the tool bit, and the locking part can slide in a radial direction of the tool cylinder, so that the locking part can be abutted against and separated from the clamping protrusion;

the cutter head is provided with an initial position relative to the cutter barrel in the axial direction of the cutter barrel, the cutter head is closer to the cutter barrel than the cutter head is in the locking position when in the initial position, and the locking part is positioned between the clamping protrusion and the cutter head when in the initial position in the axial direction of the cutter barrel;

the clamping protrusion can push against the locking part when the tool bit slides towards the locking position, so that the locking part slides towards the direction far away from the connecting shaft to avoid the clamping protrusion, and the clamping protrusion can cross the locking part;

the locking mechanism further comprises a second elastic piece, the second elastic piece can enable the locking portion to be separated from the protruding abutting pushing back of the clamping to enable the locking portion to reset, and the locking portion can enable the cutter head to be located when the cutter head is located at the locking position, and the cutter head is enabled to be deviated from the protruding abutting side of the cutter head.

Optionally, the clamping protrusion has a clamping surface facing away from the tool bit and a transition surface connected with the clamping surface, the clamping surface can be abutted against the locking part to prevent the connecting shaft from sliding towards the direction departing from the cutter head, and the vertical distance from the transition surface to the central axis of the connecting shaft is gradually increased from one end far away from the clamping surface to one end close to the clamping surface, the transition surface can push the locking part, so that the locking part slides towards the direction far away from the connecting shaft to avoid the clamping bulge, the second elastic piece can provide elastic force for promoting the locking part to slide towards the direction close to the connecting shaft in the radial direction of the knife cylinder, so that the locking part can slide to the clamping surface after being separated from the transition surface, and the locking part and the clamping surface can be abutted under the action of the first elastic piece.

Optionally, the clamping protrusion is an annular protrusion which is arranged on the shaft wall of the connecting shaft in a surrounding manner and the outer peripheral surface of the clamping protrusion is a conical surface, and the outer peripheral surface of the clamping protrusion is the transition surface;

and/or the connecting shaft can rotate relative to the cutter barrel, and the cutter head can rotate along with the connecting shaft.

Optionally, a sliding groove is formed in the knife cylinder, the locking piece comprises a locking body and a sliding column fixedly connected with the locking body, the sliding column is installed in the sliding groove and can slide in the radial direction of the knife cylinder, the second elastic piece can enable the sliding column to slide so as to drive the locking portion to slide in the direction close to the connecting shaft, and the locking portion is located on the locking body.

Optionally, the knife cylinder is further provided with a mounting hole, the mounting hole is communicated with the sliding groove, the mounting hole extends in a direction perpendicular to the axial direction of the knife cylinder, the locking mechanism further includes a blocking piece, the blocking piece is mounted in the mounting hole, a part of the second elastic piece is accommodated in the mounting hole, the other part of the second elastic piece is accommodated in the sliding groove, and two ends of the second elastic piece are respectively elastically abutted to the sliding column and the blocking piece;

and/or, the one end of the knife cylinder back to the knife head is provided with a mounting groove communicated with the sliding groove, the locking body part is contained in the mounting groove, the hole forming device further comprises a limiting part, the limiting part is fixedly installed at the one end of the knife cylinder back to the knife head, and at least part of the limiting part covers the mounting groove so as to prevent the locking part from separating from the mounting groove.

Optionally, a locking hole is formed in the locking piece, the connecting shaft can be slidably inserted into the locking hole, and the locking part is a partial edge area of the locking hole;

and/or, the locking piece still has operating portion, operating portion can supply the operator right the locking piece exerts the messenger the locking portion is towards keeping away from the connecting axle direction slides, and makes the locking portion with the joint arch breaks away from the external force of butt.

Optionally, the protruding first butt arch that is equipped with of axle wall of connecting axle, the protruding second butt arch that is equipped with of inner wall of a sword section of thick bamboo in the axial of a sword section of thick bamboo, the protruding second butt that is located first butt arch with between the tool bit, the both ends difference elasticity butt of first elastic component in first butt arch with the second butt is protruding.

Optionally, the first abutting protrusion is accommodated in the knife cylinder, the tapping device further comprises a rear cover, the rear cover is arranged at one end, far away from the knife head, of the knife cylinder, and the rear cover can abut against the first abutting protrusion to prevent the first connecting shaft from sliding in a direction away from the knife head; the cutter head is provided with an initial position relative to the cutter barrel in the axial direction of the cutter barrel, the cutter head is closer to the cutter barrel than the cutter head is in the locking position in the initial position, and the rear cover is abutted to the first abutting protrusion in the initial position.

One or more of the above technical solutions in the hole forming device provided by the present application have at least one of the following technical effects: through the sliding of the connecting shaft in the axial direction of the cutter barrel, the automatic locking of the connecting shaft by the locking mechanism is realized, other operations (such as rotating the connecting shaft and the like to realize locking) are not required to be adopted when the cutter head is positioned at the locking position, the operation of the perforating device can be simplified, the operation difficulty of the perforating device is reduced, and the use is more convenient and simple. After the cutter head is maintained at the locking position, an operator can directly hold the hole opening device by one hand to stretch the cutter head into the biological tissue without stretching into the biological tissue and applying external force to the connecting shaft to maintain the cutter head at the locking position, the operator can conveniently observe the relative position of the cutter head and the top ring to adjust the position of the hole opening device so as to avoid the top ring installed on the biological tissue, thereby effectively avoiding the hole opening device from cutting the top ring and ensuring the smooth operation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic view of a first state (with a cutting head in an initial position) of an aperture forming device according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of the second state of the hole forming device of FIG. 1 (the tool bit in the locked position);

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an exploded view of the hole opening device shown in FIG. 1;

FIG. 5 is a schematic view of the connection shaft of the tapping device shown in FIG. 1;

FIG. 6 is a schematic view of the locking member of the punch device of FIG. 4;

FIG. 7 is a schematic view of the aperture opening device shown in FIG. 1 from another perspective;

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7;

FIG. 9 is a schematic view of the aperture opening device shown in FIG. 2 from another perspective;

FIG. 10 is a cross-sectional view taken along line C-C of FIG. 9;

fig. 11 is a schematic structural view of the punching device shown in fig. 1, with a locking member and a limiting member omitted.

Wherein, in the figures, the respective reference numerals:

10-knife cylinder 11-inner hole 12-second abutting projection

13-sliding groove 14-mounting hole 15-mounting groove

16-second blade 17-first containing cavity 20-connecting shaft

21-clamping bulge 21 a-clamping surface 21 b-transition surface

22-first abutment projection 30-bit 31-first blade

32-second receiving chamber 40-locking mechanism 42-first elastic member

43-locking piece 43 a-locking part 43 b-locking hole

43b1 square hole 43b2 arcuate hole 43c operating section

432-locking body 434-sliding column 44-second elastic member

46-blocking piece 48-limiting piece 50-rear cover

61-handle 62-pull rod 481-via hole

482-avoidance groove.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-10 are exemplary and intended to be used to illustrate the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which is used for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1 to 11, an embodiment of a punching device 100 is disclosed, wherein the punching device 100 can be used for punching a biological tissue (an animal tissue, a human tissue, etc., such as a heart, etc.) so as to install an auxiliary device (such as a ventricular assist pump, etc.) and the like later. As shown in fig. 1, the tapping device 100 includes a tool cylinder 10, a connecting shaft 20, a tool bit 30, and a locking mechanism 40.

Referring to fig. 2 and 3, the knife cylinder 10 is a support of the entire hole forming device 100. In the illustrated embodiment, the tool holder 10 has an inner bore 11 that is circular in cross-section. The knife cylinder 10 may be cylindrical, square or irregular.

The connecting shaft 20 is inserted into the knife cylinder 10, and the connecting shaft 20 can slide in the axial direction of the knife cylinder 10. The connecting shaft 20 is inserted into the inner hole 11 of the knife cylinder 10, the connecting shaft 20 is in clearance fit with the inner hole 11 of the knife cylinder 10, and the connecting shaft 20 is inserted into the inner hole 11 in a sliding manner. In the illustrated embodiment, the axial direction of the tool holder 10 is the extending direction of the central axis of the inner bore 11. The connecting shaft 20 extends in the same direction as the axial direction of the knife cylinder 10.

The cutter head 30 is connected with one end of the connecting shaft 20, the cutter head 30 is positioned outside the cutter cylinder 10, the cutter head 30 can slide along with the connecting shaft 20, and the cutter head 30 has a locking position relative to the cutter cylinder 10 in the axial direction of the cutter cylinder 10. In the illustrated embodiment, the tool bit 30 has a substantially hollow tapered shape, and one end of the connecting shaft 20 is accommodated in the tool bit 30. Specifically, the cutter head 30 is fixed to the connecting shaft 20 by welding, fastening, screwing, or clipping. In the illustrated embodiment, when the tool bit 30 is in the lock position, the tool bit 30 is spaced apart from the tool cylinder 10 in the axial direction of the tool cylinder 30, i.e., in the state shown in fig. 2 and 3.

In one embodiment, the cutter head 30 further has an initial position relative to the cartridge 10 in the axial direction of the cartridge 10, and the cutter head 30 is closer to the cartridge 10 in the initial position than the cutter head 30 is in the lock position. That is, the initial position is a position of the cutter head 30 with respect to the knife cylinder 10 in the initial state of the hole-forming device 100, that is, a state when the hole-forming device 100 is not used, and this state is a normal state, as shown in fig. 1, and this state is also a position of the cutter head 30 after the hole-forming device 100 completes cutting of the biological tissue. And the cutting-head 30 is in the locked position to allow the operator to insert the cutting-head 30 into the biological tissue.

Specifically, a blade is provided on a side of at least one of the tool bit 30 and the tool cylinder 10 adjacent to the other. In the illustrated embodiment, the end surface of the tool bit 30 near one end of the tool cylinder 10 is provided with a first cutting edge 31, and the end surface of the tool cylinder 10 near one end of the tool bit 30 is provided with a second cutting edge 16. Since some soft tissues may have a white malleable membrane, such as the outer surface of the heart, the provision of the first blade 31 and the second blade 16 for simultaneous cutting further ensures that the membrane is cut off, ensuring that the cut is complete. In one embodiment, the first blade edge 31 and the second blade edge 16 are both annular in shape.

In the illustrated embodiment, when the cutting head 30 is located at the initial position, the first blade 31 is partially received in the second blade 16, and a gap is formed between the first blade 31 and the second blade 16, so as to prevent the first blade 31 and the second blade 16 from being worn due to rigid friction between the first blade 31 and the second blade 16 during cutting, and further ensure that the cut of the biological tissue is neat and the cut quality is good.

Further, referring to the drawings, the inner wall of the second blade 16 and the knife cylinder 10 together enclose to form a first receiving cavity 17, and the inner wall of the second blade 16 and the knife head 30 together enclose to form a second receiving cavity 32, so as to receive the cut biological tissue.

It will be appreciated that the shape and configuration of the first and

second blades

16, 31 may be adjusted as desired; in other embodiments, one of the cutting head 30 and the knife cylinder 10 may be provided with a blade, and in this case, the hole-forming device 100 may be used for cutting a biological tissue without the above-described flexible film.

In one embodiment, the connecting shaft 20 can rotate relative to the knife cylinder 10, and the knife head 30 can rotate along with the connecting shaft 20. The cutter head 30 and the cutter cylinder 10 can clamp the biological tissue to be cut together, and the cutter head 30 is driven to rotate by rotating the connecting shaft 20, so that the cutting function of the hole-forming device 100 is realized. Specifically, when cutting the biological tissue, the biological tissue is clamped between the first blade 31 and the second blade 16, and the cutting is performed while the connecting shaft 20 drives the blade 30 to rotate. When the tissue is cut, the cut biological tissue is located in the first receiving cavity 17 and/or the second receiving cavity 32, and can be taken out together with the whole tapping device 100 without falling into the human body.

It should be noted that, in order to realize the function of the tapping device 100 to cut the biological tissue, the connecting shaft 20 may not rotate relative to the knife cylinder 10, and the knife edge is set to be sharp enough, so that the connecting shaft 20 only needs to slide in the axial direction of the knife cylinder 10 to cut the biological tissue.

In one embodiment, a handle 61 is provided at an end of the connecting shaft 20 away from the cutter head 30, and the handle 61 is located outside the knife cylinder 10. The cutter head 30 is slid in a direction away from the cutter cylinder 10 by the connecting shaft 20 by applying an external force to the handle 61, and the cutter head 30 is rotated by the connecting shaft 20 by rotating the handle 61.

Further, opposite sides of the outer peripheral wall of the knife cylinder 10 are provided with pull rods 62 perpendicular to the axial direction of the knife cylinder 10. When the connecting shaft 20 drives the tool bit 30 to slide in a direction away from the knife cylinder 10, the hand is abutted against the handle 61, two fingers (index finger and middle finger) respectively hook the two pull rods 62 to apply force to the handle 61 and the pull rods 62 simultaneously, and the knife cylinder 10 slides towards the handle 61, i.e. the tool bit 30 slides in a direction away from the knife cylinder 10, so that the tool bit 30 is separated from the knife cylinder 10, or the tool bit 30 slides to a locking position. Through the design of the handle 61 and the pull rod 62, the separation operation of the knife cylinder 10 and the knife head 30 is more convenient, time-saving and labor-saving; in addition, the handle 61 also facilitates the operator to rotate the connecting shaft 20. Specifically, the handle 61 is fixed to the connecting shaft 20 by welding, fastening, screwing, or clipping.

The locking mechanism 40 is mounted on the knife cylinder 10, and the locking mechanism 40 can automatically lock the connecting shaft 20 when the knife head 30 slides to the locking position, so as to prevent the connecting shaft 20 from sliding in the axial direction of the knife cylinder 10 and maintain the knife head 30 at the locking position.

That is, the connecting shaft 20 slides in the axial direction of the knife cylinder 10, so that the locking mechanism 40 automatically locks the connecting shaft 20, and other operations (such as rotating the connecting shaft to realize locking) are not required to be performed when the knife head 30 is located at the locking position, the operation of the hole forming device 100 can be simplified, the operation difficulty of the hole forming device 100 is reduced, and the use is more convenient and simpler. After the cutter head 30 is kept at the locking position, an operator can directly hold the hole forming device 100 by one hand to stretch the cutter head 30 into the biological tissue, and external force is not required to be applied to the connecting shaft 20 while the cutter head 30 is stretched into the biological tissue to keep the cutter head 30 at the locking position, so that the operator can conveniently observe the relative position of the cutter head 30 and the top ring to adjust the position of the hole forming device 100 to avoid the top ring, thereby effectively preventing the hole forming device 100 from cutting the top ring and ensuring smooth operation.

In one embodiment, the coupling shaft 20 has a locking protrusion 21 on a shaft wall thereof, and the locking protrusion 21 can slide with the coupling shaft 20 in the axial direction of the cutter head 30. The locking mechanism 40 can cooperate with the catching protrusion 21 to achieve automatic locking of the connecting shaft 20. Specifically, the lock mechanism 40 includes a first elastic member 42 and a lock member 43.

The first elastic member 42 can provide the connecting shaft 20 with an elastic force urging the connecting shaft 20 to slide in a direction away from the cutter head 30. That is, the first elastic member 42 can provide an elastic force to the connecting shaft 20, and the elastic force can urge the connecting shaft 20 to slide in the axial direction of the tool cylinder 10 in the direction away from the tool bit 30.

In one embodiment, a first abutting protrusion 22 is convexly arranged on a shaft wall of the connecting shaft 20, a second abutting protrusion 12 is convexly arranged on an inner wall of the knife cylinder 10, the second abutting protrusion 12 is located between the first abutting protrusion 22 and the knife head 30 in an axial direction of the knife cylinder 10, and two ends of the first elastic member 42 elastically abut against the first abutting protrusion 22 and the second abutting protrusion 12 respectively, so that the first elastic member 42 can provide elastic force for the connecting shaft 20 to enable the connecting shaft 20 to slide in a direction away from the knife head 30.

Specifically, the first abutment projection 22 is accommodated in the tool barrel 10. The tapping device 100 further comprises a rear cover 50, the rear cover 50 is disposed at an end of the knife cylinder 10 far away from the knife head 30, and the rear cover 50 can abut against the first abutting protrusion 22 to prevent the first connecting shaft 20 from sliding in a direction far away from the knife head 30. When the cutter head 30 is in the initial position, the rear cover 50 abuts against one end of the first abutting projection 22, which is far away from the cutter head 30. Specifically, in the illustrated embodiment, the rear cap 50 is threadably engaged with the knife cylinder 10. The connecting shaft 20 is inserted through the rear cover 50.

It should be noted that the rear cover 50 may be omitted, in this case, a third abutting protrusion is formed on an inner wall of one end of the knife cylinder 10, which is far away from the knife head 30, and the third abutting protrusion can abut against the first abutting protrusion 22 to prevent the first connecting shaft 20 from sliding towards the direction far away from the knife head 30, and in this case, when the knife head 30 is at the initial position, the third abutting protrusion abuts against one end of the first abutting protrusion 22, which is far away from the knife head 30. Or, the third abutting protrusion is disposed on the connecting shaft 20 and located between the second abutting protrusion 12 and the cutter head 30, and at this time, the third abutting protrusion abuts against an end of the first abutting protrusion 22 away from the cutter head 30 at the initial position.

In addition, in order to enable the first elastic element 42 to provide the connecting shaft 20 with an elastic force for urging the connecting shaft 20 to slide in a direction away from the cutter head 30, the manner is not limited to the above, and the first elastic element 42 may also be configured to provide the connecting shaft 20 with a pulling force in a direction away from the cutter head 30 when the cutter head 30 is located at the locking position.

The locking piece 43 can abut against one side, away from the tool bit 30, of the clamping protrusion 21 when the tool bit 30 is located at the locking position, so that the connecting shaft 20 is prevented from sliding towards the direction away from the tool bit 30, the locking piece 43 and the first elastic piece 42 can jointly prevent the connecting shaft 20 from sliding in the axial direction of the tool cylinder 10 and lock the connecting shaft 20, and therefore the locking function of the locking mechanism 40 on the connecting shaft 20 is achieved.

Referring to fig. 4, in one embodiment, the locking member 43 has a locking portion 43a, the locking portion 43a can abut against a side of the clamping protrusion 21 away from the tool bit 30 to prevent the connecting shaft 20 from sliding in a direction away from the tool bit 30, and the locking portion 43a can slide in a radial direction of the knife cylinder 10 to enable the locking portion 43a to abut against and disengage from the clamping protrusion 21. That is, when the locking portion 43a abuts against the engaging projection 21, the locking mechanism 40 locks the connecting shaft 20 to prevent the connecting shaft 20 from sliding in the axial direction of the knife cylinder 10; when the locking portion 43a is out of contact with the engaging projection 21, the locking mechanism 40 releases the locking of the connecting shaft 20. In the present embodiment, the radial direction of the knife cylinder 10 is perpendicular to the axial direction of the knife cylinder 10.

In one embodiment, when the tool bit 30 is located at the initial position, the locking portion 43a is located between the catching protrusion 21 and the tool bit 30 in the axial direction of the cartridge 10. More specifically, when the tool bit 30 is located at the initial position, the lock portion 43a and the catching protrusion 21 partially overlap with each other in an orthogonal projection on a plane perpendicular to the axial direction of the cylinder 10. The catching protrusion 21 can push against the locking portion 43a when the tool bit 30 slides toward the locking position, so that the locking portion 43a slides in a direction away from the connecting shaft 20 to avoid the catching protrusion 21, and the catching protrusion 21 can pass over the locking portion 43 a. The locking mechanism 40 further includes a second elastic member 44, and the second elastic member 44 can reset the locking portion 43a after the locking portion 43a is disengaged from the abutting of the clamping protrusion 21, so that the locking portion 43a can abut against a side of the clamping protrusion 21 away from the tool bit 30 when the tool bit 30 is located at the locking position. That is, when the tool bit 30 slides to the locking position, the locking portion 43a is disengaged from the abutting of the clamping protrusion 21, the locking portion 43a is reset under the action of the second elastic member 44, at this time, in the axial direction of the knife cylinder 10, the clamping protrusion 21 is located between the locking portion 43a and the tool bit 30, and under the action of the first elastic member 42, the locking portion 43a abuts on the side of the clamping protrusion 21 away from the tool bit 30.

When the tool bit 30 slides towards the direction close to the locking position, only an external force needs to be provided to enable the connecting shaft 20 to slide in the axial direction of the tool cylinder 10, the clamping protrusion 21 can automatically push and push the locking part 43a located on the movement path of the clamping protrusion 21 in the process of moving along with the connecting shaft 20 in the axial direction, and due to the action of the second elastic piece 44, the locking part 43a automatically returns to the original position after being separated from the pushing of the clamping protrusion 21, so that the clamping protrusion 21 is prevented from continuously sliding towards the direction away from the tool bit 30, and due to the elastic force action of the first elastic piece 42, the clamping protrusion 21 is enabled to be abutted against the locking part 43a, at this time, the connecting shaft 20 cannot slide in the axial direction of the tool cylinder 10 without the external force, the tool bit 30 is maintained at the locking position, and therefore, the automatic locking of the connecting shaft 20 by the locking.

Specifically, the second elastic member 44 can provide an elastic force urging the lock portion 43a to slide in the radial direction of the knife cylinder 10 toward the direction of the connecting shaft 20. That is, the second elastic member 44 can provide the locking member 43 with an elastic force which can urge the locking portion 43a to slide in the axial direction of the knife cylinder 10, and the elastic force can cause the locking portion 43a to slide in a direction approaching the connecting shaft 20.

Referring to fig. 5, further, the locking protrusion 21 has a locking surface 21a departing from the tool bit 30 and a transition surface 21b connected to the locking surface 21a, and the locking portion 43a can abut against the locking surface 21a to prevent the connecting shaft 20 from sliding in a direction departing from the tool bit 30; the vertical distance of the transition surface 21b to the central axis of the connecting shaft 20 gradually increases from the end distant from the click surface 21a to the end close to the click surface 21 a; the transition surface 21b can push the locking portion 43a, so that the locking portion 43a slides in a direction away from the connecting shaft 20 to avoid the clamping protrusion 21, and the second elastic member 44 can slide the locking portion 43a onto the clamping surface 21a after the locking portion 43a is separated from the transition surface 21b, so that the locking portion 43a and the clamping surface 21a can be abutted under the action of the first elastic member 42.

That is, the connecting shaft 20 drives the tool bit 30 to slide to the locking position under the action of external force, the clamping protrusion 21 slides along with the connecting shaft 20 in the axial direction of the knife cylinder 10, and when the clamping protrusion 21 slides to the locking portion 43a, the transition surface 21b of the clamping protrusion 21 abuts against the locking portion 43a, so that the locking portion 43a slides in the direction away from the connecting shaft 20 to avoid the clamping protrusion 21. Since the second elastic member 44 can provide an elastic force for urging the locking portion 43a to slide in the axial direction of the knife cylinder 10 toward the direction approaching the connecting shaft 20, when the locking portion 43a is pushed by the catching protrusion 21, the locking portion 43a can slide against the transition surface 21b, and when the locking portion 43a is separated from the transition surface 21b, the locking portion 43a returns to the original position to slide onto the catching surface 21 a. The locking portion 43a abuts against the engaging surface 21a by the first elastic member 42.

Specifically, the transition surface 21b may be planar, arcuate, or the like.

In the illustrated embodiment, the clamping protrusion 21 is an annular protrusion surrounding the shaft wall of the connecting shaft 20, and the outer peripheral surface of the annular protrusion is a conical surface, the outer peripheral surface of the clamping protrusion 21 is a transition surface 21b, and the end surface of the clamping protrusion 21 facing away from the tool bit 30 is a clamping surface 21 a. The snap projection 21 of annular configuration is more convenient for the coupling shaft 20 to be rotatable relative to the knife cylinder 10, without the need to axially align the snap projection 21 with the locking portion 43a before the coupling shaft 20 needs to be locked.

Further, the outer diameter of the end of the locking protrusion 21 away from the locking surface 21a is equal to the diameter of the connecting shaft 20, so that no step is formed between the end of the locking protrusion 21 away from the locking surface 21a and the connecting shaft 20, and the blade 30 can be smoothly driven to slide toward the locking position by the connecting shaft 20.

It should be noted that, the outer diameter of the end of the clamping protrusion 21 far from the clamping surface 21a may also be larger than the diameter of the connecting shaft 20, and at this time, the minimum distance from the locking portion 43a to the central axis of the connecting shaft 20 is larger than the radius of the end of the clamping protrusion 21 far from the clamping surface 21a, so as to ensure that the step formed by the end of the clamping protrusion 21 far from the clamping surface 21a relative to the connecting shaft 20 does not abut against the locking portion 43a when the connecting shaft 20 slides, and thus prevents the connecting shaft 20 from sliding axially.

It should be noted that the clamping protrusion 21 is not limited to the above annular protrusion, and the clamping protrusion 21 may also be wedge-shaped, and the like, at this time, the end surface of the large end of the clamping protrusion 21 is the clamping surface 21a, the larger end of the small end is closer to the tool bit 30, and the transition surface 21b is the surface of the clamping protrusion 21 facing away from the connecting shaft 20; in one embodiment, the number of the clamping protrusions 21 is multiple, and the clamping protrusions 21 are arranged around the connecting shaft 20 at intervals; in another embodiment, the locking protrusion 21 is one, and in this case, the locking protrusion 21 is aligned with the locking portion 43a before the connecting shaft 20 is locked.

In one embodiment, the locking member 43 has a locking hole 43b, the connecting shaft 20 is slidably disposed through the locking hole 43b, and the locking portion 43a is a partial edge region of the locking hole 43 b.

Referring also to fig. 6, the locking hole 43b has a square hole portion 43b1 and an arcuate hole portion 43b2 communicating with the square hole portion 43b1, and the locking portion 43a is a partial edge region of the arcuate hole portion 43b 2. In this way, the locking portion 43a can better slide along the transition surface 21b, and the locking portion 43a can better and firmly abut against the engagement surface 21a of the engagement projection 21.

Referring to fig. 7 and 8, in the embodiment shown in the figure, the knife cylinder 10 is provided with a sliding groove 13. The locking member 43 includes a locking body 432 and a sliding column 434 fixed to the locking body 432. The lock hole 43b is opened in the lock body 432. That is, the locking portion 43a is located on the locking body 432. The lock body 432 is substantially plate-shaped. The locking body 432 has a first surface and a second surface opposite to the first surface, and the locking hole 43b penetrates through the first surface and the second surface. The sliding post 434 is mounted on the sliding groove 13, the sliding post 434 can slide in the radial direction of the knife cylinder 10, the second elastic element 44 can make the sliding post 434 slide to drive the locking portion 43a to slide in the direction close to the connecting shaft 20, and the locking portion 43a is located on the locking body 432. Specifically, one end of the second elastic member 44 elastically abuts against the sliding post 434.

Referring to fig. 9 and 10, in particular, the knife cylinder 10 further has a mounting hole 14, the mounting hole 14 communicates with the sliding groove 13, the mounting hole 14 extends along a direction perpendicular to the axial direction of the knife cylinder 10, the locking mechanism 40 further includes a blocking piece 46, the blocking piece 46 is mounted in the mounting hole 14, a portion of the second elastic piece 44 is located in the sliding groove 13, another portion is located in the mounting hole 14, and two ends of the second elastic piece 44 respectively elastically abut against the sliding column 434 and the blocking piece 46. When installed, the second resilient member 44 can be inserted into the mounting hole 14, and the second resilient member 44 is prevented from being removed from the mounting hole 14 by the installation of the blocking member 46 into the mounting hole 14, while the blocking member 46 is in resilient abutment with an end of the second resilient member 44 remote from the sliding post 434 to define an end of the second resilient member 44 remote from the sliding post 434. On one hand, the installation of the second elastic element 44 is facilitated by adopting the structure, and on the other hand, the installation hole 14 can limit the part of the second elastic element 44 contained in the installation hole 14 to position the second elastic element 44, so that the deflection problem of the second elastic element 44 is avoided.

In the illustrated embodiment, there are two sliding posts 434, and there are two second resilient members 44 and two plugs 46. It is understood that the number of the sliding columns 434, the second elastic members 44 and the blocking members 46 can be adjusted according to the requirement, and the number of the sliding columns 434, the second elastic members 44 and the blocking members 46 can be the same or different, for example, one sliding column 434 can correspond to a plurality of second elastic members 44, and so on.

The blocking member 46 may be a plug, a screw, or a bolt. In one embodiment, the block piece 46 is threadably engaged with the mounting hole 14 to facilitate installation of the block piece 46.

Referring to fig. 11, further, an end surface of an end of the knife cylinder 10 facing away from the knife head 30 is provided with an installation groove 15 communicating with the sliding groove 13, a locking body 432 is partially accommodated in the installation groove 15, the locking mechanism 40 further includes a limiting member 48, and the limiting member 48 is fixedly installed at an end of the knife cylinder 10 facing away from the knife head 30 and at least partially shields the installation groove 15 to prevent the locking member 43 from being separated from the knife cylinder 10. The limiting member 48 abuts against a side of the locking body 432 away from the sliding column 434, and the locking body 432 can slide relative to the limiting member 48.

Pushing the locking body 432 to slide in the mounting groove 15, the mounting groove 15 plays a role in guiding the movement of the locking body 432, so that the locking piece 43 can slide stably and reliably, meanwhile, the mounting groove 15 provides a mounting space for the locking body 432, and the limiting piece 48 plays a role in limiting, so that the locking piece 43 can be stably mounted on the knife cylinder 10.

In an embodiment, as shown in fig. 3, 4, 10 and 11, a through hole 481 is formed on the limiting member 48, and the connecting shaft 20 is inserted through the through hole 481, the locking hole 43b and the inner hole 11 of the knife cylinder 10. The stop 48 is mounted to the cartridge 10 by fasteners. The number of the fasteners is two, and the fasteners are respectively located at two sides of the through hole 481, so that the connection between the limiting piece 48 and the knife cylinder 10 is more stable and reliable. In particular, the fastener is a screw, a screw or a bolt. It should be noted that the number of the fastening members may be one, two, three or more, and the specific number may be selected according to the actual structure, which is not limited herein.

In the illustrated embodiment, the mounting groove 15 is closer to the tool bit 30 than the sliding groove 13 in the axial direction of the tool cylinder 10, and the number of the sliding grooves 13 is two and is respectively located on two sides of the inner hole 11, so that the locking member 43 can slide more stably and reliably in the radial direction of the tool cylinder 10. In addition, since the sliding column 434 is installed in the sliding groove 13, and the limiting action of the limiting member 48 also limits the movement of the locking member 43 in the radial direction of the knife cylinder 10, the locking body 432 is prevented from completely separating from the installation groove 15.

It is understood that in other embodiments, the sliding groove 13 may be located at the side of the mounting groove 15, that is, the mounting groove 15 and the sliding groove 13 are disposed along the radial direction of the knife cylinder 10, and in this case, the sliding column 434 is located at the side of the locking body 432. In this case, the stopper 48 may be omitted, or the stopper 48 may serve to block the lock member 43, or the stopper 48 may be provided to cover the mounting groove 15 and the sliding groove 13 to block the lock member 43 and limit the lock member 43 in the axial direction of the knife cylinder 10, or the stopper 48 may be provided to cover only the mounting groove 15 or the sliding groove 13 to limit the lock member 43 in the axial direction of the knife cylinder 10.

In other embodiments, the number of the sliding grooves 13 may be one, two, three, or more than three, and the specific number thereof may be selected according to the actual structure, and is not limited herein.

In one embodiment, the locking member 43 further has an operating portion 43c, and the operating portion 43c can allow the operator to apply an external force to the locking member 43 to slide the locking portion 43a in a direction away from the connecting shaft 20, so that the locking portion 43a is disengaged from the engaging protrusion 21. The operator releases the lock of the connecting shaft 20 by the lock mechanism 40 by biasing the operation portion 43c so that the lock portion 43a is out of contact with the engaging projection 21. At this time, the connecting shaft 20 slides in a direction away from the cutting head 30 under the elastic force of the first elastic member 42, and if the operator releases the force pushing the operating portion 43c, the locking member 43 returns to the original position under the elastic force of the second elastic member 44, and at this time, the locking portion 43a is located between the engaging protrusion 21 and the cutting head 30.

Further, the operating portion 43c is convex, the operating portion 43c is positioned outside the mounting groove 15, and the stopper 48 is opened with a relief groove 482 that relieves the operating portion 43 c.

In one embodiment, the connecting shaft 20 is located between the operating portion 43c and the locking portion 43 a. At this time, by pushing the operating portion 43c, the lock member 43 slides in the axial direction of the knife cylinder 10, the operating portion 43c moves in a direction approaching the connecting shaft 20, and the lock portion 43a slides in a direction away from the connecting shaft 20 until the lock portion 43a comes out of abutment with the catching projection 21.

In one embodiment, the method for cutting biological tissue using the above-described punch device 100 is as follows:

firstly, installing a top ring on biological tissue, and then cutting a cross incision on the biological tissue by using a common cutting tool;

an external force is applied to one end of the connecting shaft 20 far away from the cutter head 30, the connecting shaft 20 slides along the axial direction of the cutter cylinder 10 and drives the cutter head 30 to slide towards the direction close to the locking position, the first elastic piece 42 is compressed, when the clamping protrusion 21 slides to the locking piece 43 along with the connecting shaft 20, the transition surface 21b of the clamping protrusion 21 abuts against the locking part 43a, the second elastic piece 44 is compressed, the locking part 43a slides towards the direction far away from the connecting shaft 20 along the radial direction of the cutter cylinder 10 so as to avoid the clamping protrusion 21, when the cutter head 30 slides to the locking position, the transition surface 21b is separated from the locking part 43a, the second elastic piece 44 resets to drive the locking part 43a to reset and is positioned on the clamping surface 21a of the clamping protrusion 21, and under the action of the first elastic piece 42, the clamping surface 21a of the clamping protrusion 21 abuts against the locking part 43a so as to prevent the connecting shaft 20 from sliding in the axial direction of the cutter, automatic locking of the connecting shaft 20 is achieved, with the cutting head 30 remaining in the locked position. In this state, the operator can directly hold the hole-forming device 100 with one hand to insert the cutting head 30 into the biological tissue without applying an external force to the connecting shaft 20 to maintain the cutting head 30 at the locking position while inserting the biological tissue, and the operator can conveniently observe the relative position of the cutting head 30 and the top ring to adjust the position of the hole-forming device 100 to avoid the top ring, thereby effectively preventing the hole-forming device 100 from cutting the top ring and ensuring the smooth operation.

After the cutting head 30 is inserted into the biological tissue, it is determined that the cutting blade top ring will not be cut by the tapping device 100, an operator applies an external force to the operating portion 43c, for example, the operating portion 43c is pushed, the second elastic member 44 is compressed, the locking portion 43a slides in a direction away from the connecting shaft 20 in the radial direction until the locking portion 43a disengages from the engaging surface 21a of the engaging protrusion 21, at this time, the first elastic member 42 drives the connecting shaft 20 to slide in a direction away from the cutting head 30 until the biological tissue is clamped between the cutting head 30 and the cutting barrel 10, the connecting shaft 20 is rotated to cut the biological tissue to be cut, while cutting the biological tissue, the first elastic member 42 drives the connecting shaft 20 to continue to slide in a direction away from the cutting head 30 until the first engaging protrusion 22 abuts against the rear cover 50, the connecting shaft 20 stops sliding in the axial direction of the cutting barrel 10, and the cutting head 30 returns to the initial position, and biological tissue has also been cut.

It should be noted that, the automatic locking of the connecting shaft 20 by the locking mechanism 40 is realized, and is not limited to the above structure, in other embodiments, the locking member 43 may be a telescopic member, when the cutter head 30 is located at the locking position, the locking member 43 extends to abut against the side of the clamping protrusion 21 away from the cutter head 30, and the extension of the locking member 43 may be controlled by a position sensor, a trigger button such as a protrusion of the connecting shaft 20, and the like, so as to realize the spontaneous abutment of the locking member 43 against the clamping protrusion 21; or, the locking piece 43 can rotate, when the tool bit 30 is located at the locking position, the locking piece 43 rotates to the side of the clamping protrusion 21 departing from the tool bit 30 and abuts against the clamping protrusion 21, the rotation of the locking piece 43 can be controlled by a position sensor, a protrusion of the connecting shaft 20 and other trigger buttons, and the locking piece 43 can abut against the clamping protrusion 21 spontaneously.

The present invention is not intended to be limited to the particular embodiments shown, but is to be accorded the widest scope consistent with the principles and spirit of the present invention.

Claims

1. An aperturing device, comprising:

a knife cylinder;

2. The tapping device of claim 1, wherein a clamping protrusion is provided on a wall of the connecting shaft, the clamping protrusion can slide along with the connecting shaft in an axial direction of the tool bit, and the locking mechanism comprises:

the locking piece can the tool bit be located when the locking position with the bellied deviating from of joint one side butt of tool bit to the prevention the connecting axle is towards deviating from the direction of tool bit slides, so that the locking piece can with first elastic component stops jointly the connecting axle is in the axial of sword section of thick bamboo is slided, and the locking the connecting axle.

3. The tapping device as claimed in claim 2, wherein the locking member has a locking portion which can abut against a side of the clamping protrusion facing away from the tool bit to prevent the connecting shaft from sliding in a direction facing away from the tool bit, and the locking portion can slide in a radial direction of the tool cylinder to enable the locking portion to abut against and disengage from the clamping protrusion;

the cutter head is provided with an initial position relative to the cutter barrel in the axial direction of the cutter barrel, the cutter head is closer to the cutter barrel than the cutter head is in the locking position in the initial position, and the locking part is positioned between the clamping protrusion and the cutter head in the axial direction of the cutter barrel when the cutter head is positioned in the initial position;

the clamping bulge can push against the locking part when the tool bit slides towards the locking position, so that the locking part slides towards the direction far away from the connecting shaft to avoid the clamping bulge, and the clamping bulge can cross the locking part;

the locking mechanism further comprises a second elastic piece, the second elastic piece can enable the locking portion to be separated from the protruding abutting pushing back of the clamping to enable the locking portion to reset, and the locking portion can enable the tool bit to be located when the locking position is achieved, and the locking portion is in abutting connection with one side of the tool bit, which is away from the protruding clamping.

4. The tapping device as claimed in claim 3, wherein the latching protrusion has a latching surface facing away from the tool bit and a transition surface connected to the latching surface, the latching surface is capable of abutting against the locking portion to prevent the connecting shaft from sliding in a direction away from the tool bit, a vertical distance from the transition surface to a central axis of the connecting shaft is gradually increased from an end away from the latching surface to an end close to the latching surface, the transition surface is capable of abutting against the locking portion to allow the locking portion to slide in a direction away from the connecting shaft to avoid the latching protrusion, the second elastic member is capable of providing an elastic force to urge the locking portion to slide in a direction close to the connecting shaft in a radial direction of the tool cylinder, so that the locking portion can slide onto the latching surface after being separated from the transition surface, so that the locking part and the clamping surface can be abutted under the action of the first elastic piece.

5. The tapping device as claimed in claim 4, wherein the clamping protrusion is an annular protrusion surrounding the shaft wall of the connecting shaft, the outer peripheral surface of the clamping protrusion is a conical surface, and the outer peripheral surface of the clamping protrusion is the transition surface;

6. The tapping device as claimed in claim 4, wherein the knife cylinder has a sliding groove, the locking member comprises a locking body and a sliding post fixedly connected to the locking body, the sliding post is mounted in the sliding groove, the sliding post is capable of sliding in a radial direction of the knife cylinder, the second elastic member is capable of urging the sliding post to slide so as to drive the locking portion to slide in a direction close to the connecting shaft, and the locking portion is located on the locking body.

7. The tapping device according to claim 6, wherein the knife cylinder further defines a mounting hole, the mounting hole communicates with the sliding groove, the mounting hole extends in a direction perpendicular to an axial direction of the knife cylinder, the locking mechanism further comprises a blocking member, the blocking member is mounted in the mounting hole, a portion of the second elastic member is received in the mounting hole, another portion of the second elastic member is received in the sliding groove, and two ends of the second elastic member elastically abut against the sliding column and the blocking member, respectively;

and/or, the one end of the knife cylinder back to the knife head is provided with a mounting groove communicated with the sliding groove, the locking body part is contained in the mounting groove, the hole forming device further comprises a limiting part, the limiting part is fixedly arranged at the one end of the knife cylinder back to the knife head, and at least part of the limiting part covers the mounting groove so as to prevent the locking part from separating from the mounting groove.

8. The tapping device as claimed in claim 3, wherein the locking member has a locking hole formed therein, the connecting shaft is slidably inserted through the locking hole, and the locking portion is a partial edge region of the locking hole;

and/or, the locking piece still has operating portion, operating portion can supply the operator right the locking piece exerts the messenger the locking portion is towards keeping away from the connecting axle direction slides, and makes the locking portion with the protruding external force that breaks away from the butt of joint.

9. The tapping device as claimed in claim 2, wherein a first abutting protrusion is protruded from a wall of the connecting shaft, a second abutting protrusion is protruded from an inner wall of the knife cylinder, the second abutting protrusion is located between the first abutting protrusion and the knife head in an axial direction of the knife cylinder, and both ends of the first elastic member are elastically abutted against the first abutting protrusion and the second abutting protrusion, respectively.

10. The tapping device of claim 9 wherein the first abutment protrusion is received in the tool holder, the tapping device further comprising a rear cover disposed at an end of the tool holder remote from the tool bit, the rear cover being capable of abutting the first abutment protrusion to prevent the first connecting shaft from sliding in a direction away from the tool bit; the cutter head is provided with an initial position relative to the cutter barrel in the axial direction of the cutter barrel, the cutter head is closer to the cutter barrel than the cutter head is at the locking position when the cutter head is at the initial position, and the rear cover is abutted to the first abutting protrusion when the cutter head is at the initial position.