CN114343824A

CN114343824A - Detachable medical instrument

Info

Publication number: CN114343824A
Application number: CN202011092123.4A
Authority: CN
Inventors: 马秀峰; 李枝东; 杨光; 陈继东; 聂红林
Original assignee: Zhejiang Yijing Medical Equipment Co ltd; SHANGHAI YISI MEDICAL TECHNOLOGY CO LTD; Yisi Suzhou Medical Technology Co Ltd
Current assignee: Zhejiang Yijing Medical Equipment Co ltd; SHANGHAI YISI MEDICAL TECHNOLOGY CO LTD; Yisi Suzhou Medical Technology Co Ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2022-04-15
Also published as: WO2022078160A1

Abstract

The present invention provides a detachable medical device comprising: the device comprises a handle, a transmission device and an execution device, wherein one end of the transmission device is detachably connected to the handle, and the other end of the transmission device is detachably connected to the execution device; the transmission device comprises a guide mechanism and a push rod, and a tong head is arranged at the near end of the execution device; one end of the guide mechanism can be detachably connected with the handle; the tong head is arranged near the other end of the guide mechanism in an openable and closable manner; the push rod is movably arranged in the guide mechanism and is detachably connected with an actuating device which passes through the opening of the binding clip; in a first state, the push rod does axial motion and circumferential rotation motion in the guide mechanism; the actuating device moves axially in the guide mechanism, and the push rod and the actuating device are mounted and dismounted through relative movement between the actuating device and the push rod in the first state. All parts of the device can be cleaned after being fully disassembled, and particularly, the parts except the blade can be disassembled so as to be reused after being cleaned and sterilized.

Description

Detachable medical instrument

Technical Field

The invention belongs to the technical field of medical instruments, relates to a medical instrument, and particularly relates to a detachable medical instrument.

Background

High frequency electrosurgical instruments are used in surgical procedures to electrocoagulate hemostasis and/or cut tissue. High frequency electrosurgical instruments typically include both gun and forceps type configurations. The high-frequency electrosurgical instrument has the action principle that blood vessels are clamped and physically pressurized through the two clamps at the front end, and meanwhile, high-frequency electric energy is provided by the high-frequency energy generator and transmitted to the metal clamps at the front end of the instrument, so that collagen and fibrin in the blood vessels are dissolved, denatured and fused together, and the blood vessels are closed. After the blood vessel is closed, the closing belt can be cut off by directly taking out the knife, so that the operation time is greatly shortened, the bleeding is reduced, and the operation risk is reduced to the minimum. It is widely used in surgical operations due to its high efficiency and reliability relative to conventional suture ligation.

Most of the existing high-frequency electrosurgical instruments are disposable instruments, which are discarded after one operation, and the use cost is high. If the reusable instrument is made to reduce the use cost, on one hand, the problem of service life of parts needs to be considered, and the parts with short service life, easy wear and corrosion and low use cost are generally made to be disposable, while the parts with long service life, high reliability and high cost are made to be reusable; on the other hand, the cleaning, disinfection and sterilization problems of instruments after the operation are finished need to be considered. Therefore, the design of the instrument needs to ensure that blood or tissue fluid flowing into the lumen of the instrument after the previous operation can be conveniently cleaned, otherwise, the electrosurgical instrument cannot be reused even though the structure and performance of the electrosurgical instrument are still good.

In view of the above, there is a need to design a detachable medical device so as to overcome the above-mentioned drawbacks of the detachable medical devices.

Disclosure of Invention

The invention provides a detachable medical instrument, which has the advantages of simple and convenient tool changing process and easy operation.

In order to solve the technical problem, according to one aspect of the present invention, the following technical solutions are adopted:

a detachable medical instrument, comprising: the device comprises a handle, a transmission device and an execution device, wherein one end of the transmission device is detachably connected to the handle, and the other end of the transmission device is detachably connected to the execution device; the transmission device comprises a guide mechanism and a push rod, and a tong head is arranged at the near end of the execution device;

one end of the guide mechanism is fixed with the handle; the tong head is arranged near the other end of the guide mechanism in an openable and closable manner;

the push rod is movably arranged in the guide mechanism and is detachably connected with the actuating device which passes through the opening of the binding clip;

in a first state, the push rod does axial motion in the guide mechanism and simultaneously does circumferential rotation motion;

the actuating device moves axially in the guide mechanism, and the push rod and the actuating device are mounted and dismounted through relative movement between the push rod and the actuating device in a first state.

Preferably, one end of the push rod is inserted into the guide mechanism from the end far away from the binding clip, and is detachably connected with the actuating device passing through the opening of the binding clip.

As an embodiment of the present invention, the guide mechanism includes an inner sleeve, a first guide portion is disposed in the inner sleeve, and a third guide portion corresponding to the first guide portion is disposed on the push rod;

under the cooperation of the first guide part and the third guide part, the push rod does axial movement and circumferential rotation movement in the inner sleeve.

As an embodiment of the present invention, the first guide portion is a first protrusion provided on an inner wall of the inner sleeve, and the third guide portion is a first groove provided on an outer wall of the push rod and extending along an axial curve, or the first guide portion is a first groove provided on an inner wall of the inner sleeve and extending along an axial curve, and the third guide portion is a first protrusion provided on an outer wall of the push rod; through the movement of the first protrusion in the first groove, the push rod does axial movement and circumferential rotation movement in the inner sleeve. The first groove is preferably a curved groove extending along an axial curve, such as a spiral groove.

In one embodiment of the present invention, in the second state, the push rod moves axially in the guide mechanism.

In an embodiment of the present invention, a second guide portion is provided in the inner tube, a fourth guide portion corresponding to the second guide portion is provided on the push rod, and the push rod moves axially in the inner tube by the cooperation of the second guide portion and the fourth guide portion.

As an embodiment of the present invention, the second guide portion is a second protrusion disposed on the inner sleeve and arranged along the axial direction, and the fourth guide portion is a second groove disposed on the push rod and corresponding to the second protrusion; or the second guide part is a second groove which is arranged on the inner sleeve and is distributed along the axial direction, the fourth guide part is a second bulge which is arranged on the push rod and corresponds to the second groove, and the push rod moves axially in the inner sleeve through the movement of the second bulge in the second groove. Wherein the second groove may be a linear groove.

As an embodiment of the present invention, the guide mechanism further includes a guide support, the guide support is provided with a limit support portion arranged in parallel to the axial direction of the inner sleeve, the limit support portion is a linear groove, one end of the actuator is open, the side wall of the open end of the actuator abuts against the inner walls of the two sides of the linear groove, and makes reciprocating axial movement along the inner walls of the two sides of the linear groove, and the proximal end of the actuator passes through the linear groove and is detachably connected to the distal end of the push rod.

As an embodiment of the present invention, the strip-shaped protrusion passes through an opening end of the actuating device, and both sides of the strip-shaped protrusion respectively abut against two side wall portions of the actuating device, and the actuating device performs reciprocating axial movement under the guiding coordination of the strip-shaped protrusion. Wherein, the strip-shaped bulge plays a role in guiding; preferably, when the actuator is a blade, especially when the blade is thin, the strip-shaped protrusion process plays a role of guiding and also plays a role of preventing the open end of the blade from being deformed, especially preventing the two side portions of the open end of the blade from being expanded and retracted.

As an embodiment of the present invention, the actuator is a blade, one end of the actuator is open, the open end of the actuator is provided with a first connecting mechanism, the push rod is provided with a second connecting mechanism corresponding to the first connecting mechanism, and the first connecting mechanism and the second connecting mechanism are mounted and dismounted by the movement cooperation of the push rod in the first state and the second state. Wherein, the final controlling element is the blade, the blade is an open-ended elongated flat structure, the blade joint portion that first coupling mechanism formed for the indent, second coupling mechanism is for corresponding the push rod joint portion of blade joint portion, through the second state under the blade joint portion with the relative motion of push rod joint portion, realize the blade with final controlling element's installation and dismantlement.

As an embodiment of the present invention, the actuating device is a blade, and when the blade is mounted, after the push rod passes through the first state and the second state, the push rod rotates in the first direction by a certain angle to avoid the axial movement of the first connecting mechanism of the blade; the blade is inserted into the inner sleeve from the opening of the binding clip through the guide supporting piece, moves to the second connecting mechanism along the axial direction and then is continuously pushed towards the direction far away from the opening of the binding clip until the first connecting mechanism of the blade is abutted against the second connecting mechanism on the push rod, the push rod rotates to a certain angle towards the second direction after passing through the second state, and the first connecting mechanism and the second connecting mechanism are completely clamped, so that the blade and the push rod are installed;

when the cutter is in a working state, the push rod enters a first state, and the blade moves axially along with the push rod;

when the blade is disassembled, the push rod is pushed towards the opening direction close to the binding clip along the axial direction, after the push rod sequentially passes through a first state and a second state, the push rod is rotated by a certain angle towards the first direction relative to the blade clamping portion, a second connecting mechanism of the push rod is completely separated from a first connecting mechanism of the blade, the blade is disassembled from the push rod and then taken out through the jaw, and the blade is disassembled.

Specifically, the present invention provides a detachable medical device which is aimed at: the cutting blade can be mounted and dismounted from the jaw part of the tong head and the push-type broach rod, and the cutting blade can be replaced. However, during use, the whole apparatus has 2 states: one is in a mounting, dismounting and replacing state, and the other is in a normal working state.

More specifically, in normal operating conditions: the blade joint portion blocks each other and is in the chucking state with push rod joint portion, and the push rod is through mutually supporting of second guide part and fourth guide part and is linear motion, and simultaneously, the blade is restricted in guide support piece's groove, and the blade can only be made straight reciprocating motion under the drive of push rod this moment.

The invention has the beneficial effects that: the detachable medical instrument provided by the invention has the advantages of simple and convenient tool changing process and easiness in operation. The instrument can be detached and cleaned, and particularly, all parts except the blade can be cleaned and sterilized for reuse.

Drawings

FIG. 1 is a schematic view of a detachable medical device according to an embodiment of the present invention.

FIG. 2 is a schematic view of a detachable medical device according to an embodiment of the present invention (with the handle detached from the blade).

FIG. 3 is a schematic view of the structure of a detachable medical device (handle, blade and blade detached) according to an embodiment of the present invention.

FIG. 4 is a schematic view of a portion of a detachable medical device in accordance with an embodiment of the present invention.

FIG. 5 is a schematic view of a removable medical device removal blade in accordance with an embodiment of the present invention.

FIG. 6 is a partially exploded view of a removable medical device in accordance with an embodiment of the present invention.

FIG. 7 is a schematic view of a detachable medical device blade and guide support according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a guide support according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a blade according to an embodiment of the present invention.

Fig. 10 is a partial structural view of a blade according to an embodiment of the present invention.

Fig. 11 is a partial structural view of a blade according to an embodiment of the present invention.

FIG. 12 is a partial schematic view of a detachable medical device in accordance with an embodiment of the invention.

FIG. 13 is a schematic structural view of a detachable medical device clamp according to an embodiment of the present invention.

FIG. 14 is a partial schematic view of a removable medical device according to an embodiment of the present invention (a cutting process).

Fig. 15 is a partially enlarged view of fig. 14.

Fig. 16 is a schematic view of the blade pushing bar cooperating with the blade according to an embodiment of the present invention (the blade pushing face of the blade pushing bar pushes the pushed face of the blade).

Fig. 17 is a schematic view of the engagement of the pusher bar and the blade (the engagement of the first connecting mechanism/pusher bar engaging portion and the second connecting mechanism/blade engaging portion) in an embodiment of the present invention.

Fig. 18 is a sectional view taken along line a-a of fig. 17.

FIG. 19 is a schematic view of a second groove of a removable medical device engaged with a second protrusion according to an embodiment of the present invention.

FIG. 20 is a partial schematic view of a removable medical device in accordance with an embodiment of the present invention (retracting process).

Fig. 21 is a schematic structural view illustrating the pushing bar moving linearly away from the bit according to an embodiment of the present invention.

Fig. 22 is a schematic view showing a state in which the first coupling mechanism/push-bar engaging portion and the second coupling mechanism/blade engaging portion are engaged in accordance with an embodiment of the present invention.

Fig. 23 is a schematic view illustrating a state where the second groove and the second protrusion are engaged with each other according to an embodiment of the present invention.

Fig. 24 is a sectional view taken along line a-a of fig. 23.

FIG. 25 is a schematic view of the pusher bar relative to the blades and inner sleeve in accordance with an embodiment of the present invention.

FIG. 26 is a schematic view of a portion of a detachable medical device pusher bar according to an embodiment of the present invention.

Fig. 27 is a schematic view showing the first protrusion entering the first groove and the push rod rotating in accordance with an embodiment of the present invention.

Fig. 28 is a schematic view of the first coupling mechanism/push-bar interface being disengaged from the second coupling mechanism/blade interface in an embodiment of the present invention.

Fig. 29 is a view taken along direction a of fig. 28.

FIG. 30 is a schematic view showing the relative position between the push rod and the inner sleeve after the push rod rotates according to an embodiment of the present invention.

Fig. 31 is a schematic view illustrating an initial pushing state of the push rod according to an embodiment of the present invention.

FIG. 32 is a schematic view of the pusher bar and blade being locked in accordance with an embodiment of the present invention.

Fig. 33 is a view taken along direction a of fig. 32.

Fig. 34 is a schematic view of the structure of the pusher bar and the blade in an embodiment of the present invention.

Fig. 35 is a sectional view taken along line a-a of fig. 34.

Fig. 36 is a sectional view taken along line B-B of fig. 34.

FIG. 37 is a schematic view of the first connecting mechanism/push rod snap-in portion fully engaged with the second connecting mechanism/blade snap-in portion in accordance with one embodiment of the present invention.

Fig. 38 is a schematic view of the pusher bar and blade being locked/engaged in accordance with an embodiment of the present invention.

Fig. 39 is a sectional view taken along line a-a of fig. 38.

FIG. 40 is a partial schematic view of a completed blade installation in accordance with an embodiment of the present invention.

FIG. 41 is a partial schematic view of a completed blade installation in one embodiment of the present invention.

Fig. 42 is a schematic structural view of a pusher bar according to an embodiment of the invention.

Fig. 43 is a schematic structural view of the first connecting mechanism/push rod engaging portion according to an embodiment of the present invention.

Fig. 44 is a schematic structural view of a pusher bar locking mechanism according to an embodiment of the present invention.

FIG. 45 is a schematic view of the inner sleeve according to an embodiment of the present invention.

Fig. 46 is a cross-sectional view of the inner sleeve in an embodiment of the present invention.

FIG. 47 is an axial view of the inner sleeve in an embodiment of the present invention.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.

The description in this section is for several exemplary embodiments only, and the present invention is not limited only to the scope of the embodiments described. It is within the scope of the present disclosure and protection that the same or similar prior art means and some features of the embodiments may be interchanged.

In the description, a helical motion (helicoidal motion) is a spatial transformation, which refers to the product of a rotation and a translation transformation in space with a direction of movement parallel to the axis of rotation. The far end in the description is the end far away from the handle 1, and the near end is the end near the handle 1. The first state and the second state in the description may be states of the push lever 22 or states of the click mechanism 220 (in which the click mechanism 220 is a part of the push lever).

The invention discloses a detachable medical instrument, which comprises a handle 1, a transmission device (comprising a knife body 2) and an actuating device (comprising a blade 3) (refer to fig. 3), wherein fig. 1 to 3 are schematic structural diagrams of the detachable medical instrument from the whole to the detachment, wherein one end of the transmission device is detachably connected to the handle 1, and the other end of the transmission device is detachably connected with the actuating device.

Referring also to fig. 4-6, the detachable medical device according to an embodiment of the present invention is schematically illustrated in a structure in which the actuating device is detached from the transmission device, wherein the transmission device may be a power transmission structure including a blade 2, and the actuating device may be a distal end effector for cutting tissue according to the power transmitted by the transmission device, and it can be understood that the actuating device includes a blade 3, and one end of the blade 2 is detachably connected to the handle 1, and the other end is detachably connected to the blade 3 (refer to fig. 4), wherein the blade 3 is used for cutting human tissue, especially when the closing band is cut by the blade after the blood vessel is closed by the electrosurgical instrument during the surgical procedure. In other preferred embodiments, the actuating device may also be in the form of scissors, forceps, tweezers, or the like.

Further, the transmission device (blade 2) comprises a guide mechanism and a push rod (push rod 22), and the proximal end of the actuating device comprises a tong head 25. Wherein, the one end of guiding mechanism can be dismantled with the handle and be connected, near the other end of guiding mechanism is located to binding clip 25 openable and closeable, and the push rod (push away the cutter arbor 22) sets up in guiding mechanism and can move in guiding mechanism to can realize push rod (push away cutter arbor 22) and pass the open-ended final controlling element (blade 3) of binding clip and dismantle and be connected.

In the first state, the push rod (push-out lever 22) performs a circumferential rotational movement while performing an axial movement in the guide mechanism. When the actuating device moves axially in the guide mechanism, the actuating device is mounted or dismounted on the push rod through the relative movement between the actuating device and the push rod (push rod 22) in the first state.

In one embodiment, as shown in fig. 4, the guiding mechanism further comprises an inner sleeve 21.

One end of the guide mechanism including the inner sleeve 21 (see fig. 4, the proximal end of the inner sleeve 21) is detachably connected to the handle 1, and the forceps head 25 is openably provided near the other end of the guide mechanism including the inner sleeve 21 (see fig. 4, the distal end of the inner sleeve 21). The push rod (push rod 22) is arranged in the inner sleeve 21 of the guide mechanism, and when the push rod is installed, the push rod (push rod 22) is inserted into the inner sleeve 21 from one end far away from the forceps head 25 (as shown in fig. 4) so as to be detachably connected with the blade 3 penetrating through the opening of the forceps head 25. Wherein, the far end of the blade 3 is used for cutting, and the near end is detachably connected with the push broach rod 22 and is assembled in the inner sleeve 21 of the guiding mechanism of the knife body 2; wherein, the distal end of the blade 3 is the end far away from the handle 1, and the proximal end of the blade 3 is the end near the handle 1 (as shown in fig. 5). In this embodiment, the guiding mechanism may also be in other structural forms including the inner sleeve 21, and the push rod may be in other structural forms including the push rod bar 22, and the specific structural form is not limited herein.

In the first state, the push rod 22 performs a circumferential rotation movement while performing an axial movement in the inner sleeve 21 (guiding mechanism) to achieve the mounting and dismounting of the proximal end of the push rod and the distal end of the actuating device. In the second state, the push rod 22 is moved axially within the inner sleeve 21. The first state may refer to a state from initial contact between the proximal end of the blade 3 and the distal end of the push-type broach rod 22 to completion of installation under the drive of the axial movement and the circumferential rotation movement of the push-type broach rod 22, or a state from initial separation to completion of separation between the proximal end of the blade 3 and the distal end of the push-type broach rod 22 under the drive of the axial movement and the circumferential rotation movement of the push-type broach rod 22; in the second state, the process of pushing the push rod 22 into the inner sleeve 21 of the guide mechanism in the axial direction (in the distal axial direction) may be included, in which the push rod 22 does not contact the blade 3, or the process of pushing the push rod 22 into the inner sleeve 21 of the guide mechanism in the axial direction may be included, in which after the push rod 22 and the blade 3 are mounted, the push rod 22 moves in the axial direction to drive the blade 3 mounted therewith to work together. The first state and the second state, excluding the movement state of the blade 3, are mainly realized by the movement state of the push-out lever 22 when the blade 3 is attached to the push-out lever 22 or detached from the push-out lever 22, and the movement state of the blade 3 is mainly the movement state when the blade is attached to the push-out lever proximally in the axial direction and/or the movement state when the blade is completely detached/detached distally.

In more detail, the blade 3 and the push rod 22 can be assembled and disassembled in a state that the handle 1 is separated from the blade body 2; at this time, the blade 3 is engaged with the pusher bar 22 in the inner sleeve 21 in the first state and the second state (making reciprocating axial and rotational motions) to control the relative motion between the connection portions of the distal end of the pusher bar 22 and the proximal end of the blade 3 (making circumferential rotational motion along with the axial motion, including but not limited to spiral motion), thereby realizing the installation and the removal of the pusher bar 22 and the blade 3.

Fig. 7 is a schematic structural view of a detachable medical instrument blade and guide support in an embodiment of the present invention, and as shown in fig. 6 and 7, the inner sleeve 21 may further include a guide support 24 (also referred to as a blade support) for guiding the blade 3 to reciprocate in a linear motion along the axial direction, wherein fig. 8 is a schematic structural view of the guide support in an embodiment of the present invention along the axial direction, and the guide support 24 is provided with a limit support (a linear groove 241) arranged parallel to the axial direction of the inner sleeve 21.

In an embodiment of the present invention, the position-limiting supporting portion is a linear groove 241; correspondingly, one end of the blade 3 is open, and the side wall of the open end of the blade 3 (the proximal end of the blade 3) is respectively abutted against the inner walls of the two sides of the linear groove 241, so that the blade 3 performs reciprocating axial movement under the guidance of the linear groove 241, and the proximal end of the blade passes through the linear groove 241 and then is detachably connected with the distal end of the push-type broach rod 22 passing through the inner sleeve 21.

In one embodiment, the guide support 24 is further provided with a strip-shaped protrusion 242, and the blade 3 moves axially under the guiding cooperation of the strip-shaped protrusion 242. Fig. 9 is a schematic structural diagram of a blade according to an embodiment of the present invention, as shown in fig. 9, an opening is formed at one end (a proximal end) of the blade 3, that is, the blade 3 is a long U-shaped flat structure (of course, other structures are also possible) with an opening, when the strip-shaped protrusion 242 is mated with the blade 3, the strip-shaped protrusion 242 passes through the opening end of the blade 3 and both sides thereof respectively abut against two side wall portions of the actuator, so that the strip-shaped protrusion 242 is disposed in a hollow area of the blade 3, that is, the blade 3 is a U-shaped blade, and the strip-shaped protrusion 242 is sandwiched between two side walls of the blade 3, so as to further enhance the guiding of the U-shaped blade and prevent the blade 3 from being deformed.

In one embodiment, the inner sleeve 21, the guide support 24 and the bit 25 can be formed as a single piece or assembled as a single piece from multiple pieces.

FIGS. 10-11 are schematic views of the proximal end of a blade removably attached to the push rod 22 in accordance with one embodiment of the present invention; referring to fig. 9 to 11, the open end (proximal end) of the blade 3 is provided with a first connecting mechanism (a snap structure 31), wherein the first connecting mechanism (the snap structure 31) is a snap mechanism with an inner wall recessed radially outward, and the snap structure 31 includes a blade snap portion 32 and a blade pushed surface 33 (refer to fig. 10 and 11). The snap structure 31 for realizing the detachable connection with the push-type broach rod 22 includes a snap mechanism (refer to fig. 10 and 11) formed by recessing the middle.

Referring to fig. 6, 13, 15, and 21-41, in an embodiment of the present invention, the distal end of the push rod 22 is provided with a locking mechanism 220 corresponding to the locking structure 31, so as to be able to be connected to or disconnected from the locking structure 31 at the proximal end of the blade 3. Fig. 42 to 44 are schematic structural views of a push rod according to an embodiment of the present invention; referring to fig. 42 to 44, in an embodiment of the invention, the fastening mechanism 220 is provided with a push rod fastening portion 223 and a push rod surface 224 (refer to fig. 43 and 44), and the fastening mechanism 220 can fasten the fastening structure 31 of the blade 3.

In a first position interval (corresponding to the above-mentioned second state, which may include a state where the pusher bar 22 is not in contact with the blade 3 and a state after the pusher bar 22 and the blade 3 are mounted and before the separation starts) of the inner sleeve 21, the locking mechanism 220 can move axially along the inner sleeve 21. In a second position interval (corresponding to the above-mentioned first state, which may include a state from the beginning of contact to the completion of installation of the finger blade 3 by the push-type broach rod 22 and a state from the beginning of release to the completion of separation of the blade 3 and the push-type broach rod 22) where the locking mechanism 220 is located in the inner bushing 21, the locking mechanism 220 can perform a circumferential rotation movement (also referred to as a spiral movement) to be locked or released with the locking mechanism 31 while performing an axial movement under the restriction of the inner bushing 21, thereby realizing the installation or removal of the blade 3. In a preferred embodiment, the latch structure 31 includes two L-shaped connecting mechanisms, and correspondingly, the distal end of the push-type broach rod 22 is provided with an inverted L-shaped connecting mechanism corresponding to the L-shaped connecting mechanism, and the state when the latch structure 31 is latched with the push-type broach rod 22 can be referred to fig. 38.

Referring to fig. 12, in an embodiment, the blade body 2 further includes a reset mechanism 23, wherein the reset mechanism 23 is disposed in the inner sleeve 21, the reset mechanism 23 is engaged with the push rod 22 to actively reset the push rod 22 after completing the cutting, preferably, the reset mechanism 23 is a reset spring, specifically, in an operating state of pushing the push rod 22 to move distally after the detachable medical device is mounted, the reset mechanism 23 is in a stretching state to provide a proximally moving reset force to the push rod 22, and is at a distal end after the push rod 22 completes the cutting, at which time the reset force applied to the push rod 22 is the largest, and when no external force is applied to the push rod 22, that is, when the push rod 22 is not subjected to an external force, the push rod 22 moves proximally under the proximal reset force generated by the reset mechanism 23 to return to the initial position during the blade-out operation.

Further, referring to fig. 13 to 44, in an embodiment of the present invention, a first guiding portion for guiding the push rod 22 to axially move and simultaneously rotate is disposed in the inner sleeve 21, a third guiding portion corresponding to the first guiding portion is disposed on the push rod 22, and the push rod 22 can axially move and simultaneously circumferentially rotate in the inner sleeve under cooperation of the first guiding portion and the third guiding portion. In detail, the first guiding portion may be a first protrusion 212 disposed on an inner wall of the inner sleeve, and preferably, the first protrusion 212 may be a cylindrical protrusion (as shown in fig. 26 to 27), although other structures may also be adopted; correspondingly, the third guide portion may be a first groove 222 (as shown in fig. 22) provided on an outer wall of the pusher bar 22 and extending in a curved manner in the axial direction, and the first groove 222 may be a spiral groove, but may have another configuration.

The push-type broach rod 22 can perform a circumferential rotation movement while performing an axial movement in the inner sleeve 21, guided by the cooperation of the first protrusion 212 and the first groove 222. In another embodiment of the present invention, the first guiding portion is a first groove 222 formed on the inner wall of the inner sleeve 21 and extending along an axial curve, and the third guiding portion is a first protrusion 212 formed on the outer wall of the push rod, and the operation principle is the same.

FIGS. 45-47 are schematic views of the inner sleeve according to an embodiment of the present invention; referring to fig. 45 to 47 and fig. 15 to 41, in an embodiment of the present invention, a second guiding portion is disposed in the inner sleeve 21, wherein the second guiding portion may be a second protrusion 211 disposed on the inner sleeve along the axial direction, the second protrusion 211 may be a linear protrusion, or may have another structure, and a fourth guiding portion (a second groove 221 disposed on the push rod corresponding to the second protrusion 211, the second groove 221 may be a linear groove, or may have another structure) corresponding to the second guiding portion is disposed on the push rod, and the push rod 22 axially moves in the inner sleeve 21 under the cooperation of the second protrusion 211 and the second groove 221. As shown in fig. 41, the second protrusion 211 is an extending portion arranged in parallel along the axial direction, the outer wall of the axial side portion of the extending portion abuts against the two side wall portions of the second groove 221, and further, linear guide stripes may be further provided on the two side wall portions of the extending portion contacting with the second groove 221, so as to further limit the position of the push-type broach rod 22 and prevent the push-type broach rod from rotating, which is not limited specifically; in other embodiments, the second protrusion 211 may also be a bar-shaped protrusion arranged along the axial direction.

In one embodiment, the first and

second slots

222 and 221 may be disposed at the distal end of the pusher bar 22 together with the latch mechanism 220, and the latch mechanism 220 is located near the distal-most end of the pusher bar 22.

Referring to fig. 26 again, in an embodiment, when the push rod 22 is subjected to a set force (e.g., a force applied to the distal side or the proximal side) in the first state (the state where the first protrusion 212 is located in the first groove 222 and the state where the second protrusion 211 is away from the second groove 221) of the fastening mechanism 220, due to the limitation and guidance of the first groove 222 on the first protrusion 212, the first groove 222 and the first protrusion 212 slide relatively, so that the fastening mechanism 220 can move spirally to the distal end or the proximal end (see fig. 27 and 28). When the push lever 22 (the catch mechanism 220) is in the second state (the state in which the first protrusion 212 is separated from the first groove 222 and located in the second groove 221), and the push lever 22 is subjected to a set force, the catch mechanism 220 on the push lever 22 moves in the axial direction due to the restriction and guidance of the second protrusion 211 by the second groove 221 (as shown in fig. 31).

In an embodiment of the present invention, the detachable medical device further includes a first threshold point and a second threshold point. In this process, the detachable medical device switches between the first state and the second state through the switching of the different state critical points, that is, the push rod 22 switches between an axial motion and a helical motion (of course, other forms of "axial motion and circumferential rotation motion" are also possible).

Specifically, at the first critical point, the first protrusion 212 is located at the farthest port of the first groove 222 (i.e., the far-end side end of the first groove 222), and the second protrusion 211 is located at the nearest port of the second groove 221 (as shown in fig. 26 and 40), and the push rod 22 in this state includes a state ending from the second state and beginning from the first state, and also includes a state ending from the first state and beginning from the second state.

At the second critical point, the first protrusion 212 is located at the innermost end of the first groove 222 (i.e. the proximal end of the first groove 222), and the push rod 22 moves through the first state to the end state of the first state by screwing (see fig. 27 and 34), and the second protrusion 211 is far away from the second groove 221. Further when the proximal end of the blade 3 is fully seated with the distal end of the push rod 22, the push rod 22 cannot move further distally relative to the blade 3 due to the restriction of the innermost end of the second groove 222 against the first protrusion 212. When the blade 3 is installed, the push rod 22 is pushed to the farthest end of the inner sleeve 21 in the axial direction, and the push rod 22 is rotated by a certain angle relative to the inner sleeve 21, at this time, the push rod 22 is at a first critical point, and at the same time, the blade 3 is pushed in the axial direction from the far end toward the direction close to the inner sleeve 21 to gradually approach the push rod 22, and when the blade 3 starts to contact with the push rod 22 until the blade pushed surface 33 contacts with the push surface 224, the push rod 22 is at a second critical point (the first protrusion 212 is located at the innermost end of the first groove 222); the push-out lever 22 is pushed in the axial direction toward the blade 3. In the process, the push-type broach rod 22 enters a first state from a first critical point, the push-type broach rod 22 (the farthest end of the push-type broach rod 22) makes a spiral motion relative to the blade 3 (the nearest end of the blade 3), and at the moment, the buckling structure 31 of the blade 3 starts to be gradually locked by the buckling mechanism 220, namely, in the process, the push-type broach rod 22 makes a spiral motion, the blade 3 makes an axial motion, the buckling structure 31 and the buckling mechanism 220 generate a circumferential displacement and an axial displacement at the same time, and the push-type broach rod clamping portion 223 and the blade clamping portion 32 are gradually clamped from the beginning of contact, so that the installation of the blade 3 is completed; it is understood that the contact surface of the snap structure 31 and the snap structure 220 can be a slope surface for smoothly achieving the relative movement, and is not limited in particular.

When the blade 3 is dismounted, the push rod 22 returns to the initial state of the cutter-out state by axially moving the cutter back (axially moving towards the near end) and is under the second critical point; since the push-rod catching portion 223 is in contact with the blade catching portion 32, when the push-rod 22 is pushed by a force toward the proximal end, the push-rod catching portion 223 applies a pushing force toward the proximal end to the blade catching portion 32, so that the push-rod 22 starts to enter a first state from a second critical point, in which the medical instrument is in a state of starting to remove the blade 3 (the push-rod catching portion 223 starts to separate from the blade catching portion 32), in the first state, the push-rod 22 performs a spiral motion in guiding cooperation of the first protrusion 212 and the first groove 222, and correspondingly, the push-rod catching portion 223 of the push-rod 22 gradually separates from the blade catching portion 32 due to the spiral motion of the push-rod 22, and in the first critical point, the separation of the blade catching portion 32 of the blade 3 from the push-rod catching portion 223 of the push-rod 22 is completed (completely separated at least in the circumferential direction), at which the blade 3 is axially moved toward the distal end (opposite to the moving direction of installation) to be removed, the removal of the blade 3 is achieved.

Specifically, in the first state, the blade catching portion 32 and the push rod catching portion 223 are mounted and separated on the outside of the inner sleeve 21, so that the inner sleeve 21 does not affect the mounting and removal of the blade 3.

In one embodiment of the present invention, the detachable medical device of the present invention is in a discharged state: the push bar 22 enters the second state again from the end of the first state (the push bar 22 moves in the axial direction), and at this time, since the blade 3 is attached to the push bar 22, the pushing surface 224 pushes the blade pushed surface 33 to move axially toward or away from the bit (as shown in fig. 14 to 16), that is, the blade 3 moves in the axial direction toward the distal end together with the push bar 22. In this state, the blade catching portion 32 is engaged with the push rod catching portion 223, the blade 3 cannot be separated from the push rod 22 (as shown in fig. 17 and 18), and the second protrusion 211 in the second groove 221 on the inner sleeve 21 limits the rotation of the push rod 22 (as shown in fig. 19). The blade 3 is restrained against rotation by the guide support 24 (as shown in figure 20).

When the detachable medical device is in the cutting-back state under the action of the reset mechanism 23, the push rod 22 is in the second state (the push rod 22 moves along the axial direction), and at this time, the push rod clamping portion 223 clamps the blade clamping portion 32, so as to drive the blade 3 to axially move in the inner sleeve 21 in the axial direction away from the binding clip 25 (as shown in fig. 20 and 21) until the detachable medical device returns to the initial state when the medical device is in the cutting-out state. In this state, the blade catching portion 32 is engaged with the push rod catching portion 223, the blade 3 cannot be separated from the push rod 22 (as shown in fig. 22), the inner sleeve 21 has the second protrusion 211 in the linear groove 221 to limit the rotation of the push rod 22 (as shown in fig. 23 and 24), and the blade 3 is limited by the guide support 24 and cannot rotate.

In one use scenario of the present invention, the detachable medical device of the present invention has a blade installation process as follows:

(1) the distal end of the pusher bar 22 is pushed into the inner sleeve 21 from the proximal side of the inner sleeve 21, and the distal end of the pusher bar 22 is pushed axially to the most distal end of the inner sleeve 21 to protrude out of the distal end port of the inner sleeve 21, so that the pusher bar 22 enters the first state from the second state and is at the first critical point.

(2) The jaws 25 are opened and the blade 3 is inserted axially into the inner sleeve 21 from the jaws 25 by means of the strip-like projections 242 of the guide support 24 and is gradually approached towards the distal end of the push-broach rod 22.

In this process, when the push lever 22 starts to be pushed into the inner sleeve 21, the push lever 22 is in the second state (the push lever 22 moves axially); after entering the first critical point, the pusher bar 22 enters the first state, at which point it moves spirally in the axial direction, and finally enters the second critical point. In this state, the push rod 22 is rotated by a certain angle along the axial central axis, so that the snap mechanism 220 rotates in the circumferential direction to enable the push rod clamping portion 223 to completely avoid the movement space of the blade 3 (as shown in fig. 29) to further enable the installation with the blade clamping portion 32 of the blade 3.

(3) Slowly moving away the push-type broach rod pushing source, and continuously pushing the blade 3 into the inner sleeve 21; when the pushed surface 33 of the blade meets the pushing surface 224 of the pushing rod 22, the pushed surface 33 of the blade applies a force to the pushing surface 224, so that the pushing rod 22 starts to move to the proximal end by the pushing force applied by the blade 3, and at the moment, the pushing rod 22 enters the first state and performs a spiral motion; and the blade clamping portion 32 of the blade 3 starts to be gradually clamped and locked with the push rod clamping portion 223, in the process, as the push rod 22 moves spirally, the blade 3 moves axially, and circumferential displacement is generated between the clamping structure 31 and the clamping mechanism 220 and axial displacement is generated at the same time.

More specifically, the first protrusion 212 of the inner sleeve 21, guided by the first groove 222 (shown in fig. 38) of the push-broach rod 22, allows the push-broach rod 22 to move axially and simultaneously perform a circumferential rotation movement; and the blade 3 cannot rotate under the restriction of the limit support portion (linear groove 241) of the guide support 24.

(4) At the second critical point when the first state of the push rod 22 is finished, the locking of the blade 3 by the locking mechanism 220 is completed, i.e. the push rod clamping portion 223 and the blade clamping portion 32 are clamped with each other (see fig. 28).

(5) Working state (feed/return state): the jaw is closed, the push rod 22 is in the second state under the action of the second groove 221 and the second protrusion 211, at the moment, the push rod 22 can only move axially, and the push rod clamping portion 223 and the blade clamping portion 32 are clamped and locked to drive the blade 3 to move axially together.

During this process, the first protrusion 212 of the inner sleeve 21 moves proximally along the distal outlet of the first groove 222 of the push rod 22 to finally achieve the gripping of the blade by the push surface 33 and the push surface 224 (as shown in fig. 40), while the second protrusion 211 of the inner sleeve 21 disengages from the second groove 221 of the push rod 22 (as shown in fig. 26).

In one use scenario of the present invention, the detachable medical device of the present invention detaches the blade as follows:

(1) opening the jaw to push the pusher bar 22; in the process, the push-type broach rod 22 is in the second state, and the push-type broach rod 22 can only make a single axial movement, please refer to fig. 13 and 14.

In this process, since the push rod catching portion 223 contacts the blade catching portion 32, the push rod catching portion 223 applies a pushing force to the blade catching portion 32 toward the proximal end, and the blade 3 moves along the axial direction toward the proximal end along with the push rod 22. In the second state, the second groove 221 of the push rod 22 is engaged with the second protrusion 211 of the inner sleeve 21, and the blade 3 is restricted in the setting groove by the guide support 24, so that the blade 3 and the push rod 22 can move only in the axial direction.

(2) The push rod 22 is pushed further, and the blade 3 starts to be removed, and the push rod engaging portion 223 starts to be separated from the blade engaging portion 32 and enters the second critical point.

In this process, the second groove 221 of the push-out lever 22 is disengaged from the second protrusion 211 of the inner sleeve 21, and the first protrusion 212 of the inner sleeve 21 meets the first groove 222 of the push-out lever 22 (see fig. 26 and 27).

(3) After the second critical point, the push-type broach rod 22 enters the first state, the push-type broach rod 22 spirally moves towards the far end until the push-type broach rod clamping portion 223 is separated from the blade clamping portion 32 (at least circumferential separation is realized), and at the moment, the push-type broach rod 22 is at the first critical point (the first protrusion 212 is separated from the first groove 222 on the push-type broach rod 22), and the blade 3 is axially moved out, so that the blade 3 is disassembled.

In this process, when the push rod 22 is at the second critical point, the blade 3 is separated from the snap mechanism 220, and since a part of the blade 3 is outside the inner sleeve 21, the blade 3 can be smoothly moved out. Furthermore, at this time, the push rod 22 is further restricted from moving axially to the distal end, that is, the push rod 22 cannot move to the distal end any more, so as to prevent the interference between the blade 3 and the locking mechanism 220 from affecting the smooth detachment of the blade 3.

In one use scenario of the present invention, the detachable medical instrument of the present invention may be a high frequency electrosurgical instrument; during the operation, the high-frequency electric surgical instrument is used in the same way as the existing high-frequency electric surgical instrument. When the scalpel is required to be used, the blade is installed in the scalpel body according to the operation. In the operation process, the medical staff can adjust the position of the blade through the handle; if the handle can be held during the operation, the blade extends out, thereby performing the operation; after use of the instrument, the handle may be released and the blade retracted. After the operation is finished, the blade is taken out only according to the operation of detaching the blade, and other parts of the high-frequency electric surgical operation instrument can be reused after being cleaned and sterilized.

In summary, the detachable medical apparatus provided by the invention can realize sufficient detachment of each part, can improve the repeatable utilization rate of the part of the apparatus, and can realize detachable installation with a push rod (push rod) by relative movement of the blade relative to the push rod, so that the replacement process of the part needing to be replaced is simple and convenient, and is easy to operate. Most parts of the instrument can be reused, the instrument can be detached and cleaned, and parts except for executing parts such as the blade and the like can be cleaned and sterilized and then reused.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.

Claims

1. A detachable medical instrument, comprising: the device comprises a handle, a transmission device and an execution device, wherein one end of the transmission device is detachably connected to the handle, and the other end of the transmission device is detachably connected to the execution device; the device is characterized in that the transmission device comprises a guide mechanism and a push rod, and a tong head is arranged at the near end of the execution device;

one end of the guide mechanism can be detachably connected with the handle; the tong head is arranged near the other end of the guide mechanism in an openable and closable manner;

the actuating device moves axially in the guide mechanism, and the push rod and the actuating device are mounted and dismounted through relative movement between the actuating device and the push rod in the first state.

2. The detachable medical instrument of claim 1, wherein:

the guide mechanism comprises an inner sleeve, a first guide part is arranged in the inner sleeve, and a third guide part which can be matched with the first guide part is arranged on the push rod;

under the cooperation of the first guide part and the third guide part, the push rod can do axial motion and circumferential rotation motion in the inner sleeve.

3. The detachable medical instrument of claim 2, wherein:

the first guide part is a first bulge arranged on the inner wall of the inner sleeve pipe, the third guide part is a first groove which is arranged on the outer wall of the push rod and formed by extending along an axial curve, or the first guide part is a first groove which is arranged on the inner wall of the inner sleeve pipe and formed by extending along the axial direction, and the third guide part is a first bulge arranged on the outer wall of the push rod; through the movement of the first protrusion in the first groove, the push rod does axial movement and circumferential rotation movement in the inner sleeve.

4. The detachable medical instrument of claim 1, wherein:

in the second state, the push rod can move axially in the guide mechanism.

5. The detachable medical instrument according to claim 1 or 4, wherein:

the inner sleeve is internally provided with a second guide part, the push rod is provided with a fourth guide part corresponding to the second guide part, and the push rod axially moves in the inner sleeve under the matching of the second guide part and the fourth guide part.

6. The detachable medical instrument of claim 5, wherein:

the second guide part is a second bulge which is arranged on the inner sleeve along the axial direction, and the fourth guide part is a second groove which is arranged on the push rod and corresponds to the second bulge; or the second guide part is a second groove which is arranged on the inner sleeve and is distributed along the axial direction, the fourth guide part is a second bulge which is arranged on the push rod and corresponds to the second groove, and the push rod moves axially in the inner sleeve through the movement of the second bulge in the second groove.

7. The detachable medical instrument of claim 1, wherein:

the guide mechanism further comprises a guide support piece, a limit support part which is arranged in parallel with the axial direction of the inner sleeve is arranged on the guide support piece, the limit support part is a linear groove, one end of the execution device is opened, the open end of the execution device is respectively abutted against the inner walls of two sides of the linear groove, reciprocating axial motion is carried out along the inner walls of two sides of the linear groove, and the near end of the execution device is detachably connected with the push rod after penetrating through the linear groove.

8. The detachable medical instrument of claim 7, wherein:

the guide support piece is further provided with a strip-shaped bulge, the strip-shaped bulge penetrates through the opening end of the executing device, two sides of the strip-shaped bulge are respectively abutted to two side wall parts of the executing device, and the executing device performs reciprocating axial motion under the guide matching of the strip-shaped bulge.

9. The detachable medical instrument of claim 4, wherein:

the actuating device is a blade, one end of the actuating device blade is open, a first connecting mechanism is arranged at the open end of the actuating device blade, a second connecting mechanism corresponding to the first connecting mechanism is arranged on the push rod, and the first connecting mechanism and the second connecting mechanism are installed and detached through the movement matching of the push rod in the first state and the second state.

10. The detachable medical instrument of claim 9, wherein:

when the blade is installed, after the push rod passes through a first state and a second state, the push rod rotates a certain angle relative to the guide mechanism in a first direction to avoid a first connecting mechanism of the blade, the blade is inserted into the inner sleeve from the opening of the binding clip through the guide supporting piece and moves to the second connecting mechanism along the axial direction, then the blade is continuously pushed in the direction away from the opening of the binding clip until the first connecting mechanism of the blade is abutted against the second connecting mechanism on the push rod, the push rod rotates a certain angle in a second direction, and the first connecting mechanism and the second connecting mechanism are completely clamped, so that the installation of the blade and the push rod is realized;

when the blade is disassembled, the push rod is pushed towards the opening direction close to the binding clip along the axial direction, after the push rod sequentially passes through a first state and a second state, the push rod is rotated by a certain angle towards the first direction relative to the blade clamping portion, the second connecting mechanism of the push rod is completely separated from the first connecting mechanism of the blade, the blade is taken out through the jaw, and the blade is disassembled.