Removable medical devices

Abstract

The present invention provides a detachable medical device, comprising: a handle, a transmission device and an actuator, one end of the transmission device is detachably connected to the handle, and the other end is detachably connected to the actuator; the transmission device comprises a guide mechanism and a push rod, and the proximal end of the actuator is provided with a pliers head; one end of the guide mechanism can be detachably connected to the handle; the pliers head can be opened and closed near the other end of the guide mechanism; the push rod is movably arranged in the guide mechanism and is detachably connected to the actuator passing through the opening of the pliers head; in a first state, the push rod performs axial movement in the guide mechanism and circumferential rotational movement at the same time; the actuator moves axially in the guide mechanism, and the installation and disassembly of the push rod and the actuator are realized through the relative movement between the actuator and the push rod in the first state. The various components of the device of the present invention can be fully disassembled and cleaned, especially the components except the blade can be disassembled so that they can be reused after cleaning and sterilization.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices and relates to a medical device, in particular to a detachable medical device. Background Art

[0002] High-frequency electrosurgical instruments are surgical instruments used for electrocoagulation hemostasis and / or tissue cutting during surgery. High-frequency electrosurgical instruments usually include two structures: gun-type and clamp-type. The working principle of high-frequency electrosurgical instruments is mainly to clamp and physically pressurize the blood vessels through the two clamps at the front end. At the same time, the high-frequency energy generator provides high-frequency electrical energy, which is transmitted to the metal clamps at the front end of the instrument, so that the collagen and fibrin in the blood vessels are dissolved, denatured and fused together, so that the blood vessels are closed. After the blood vessels are closed, the knife can be directly used to cut off the closure band, thus greatly shortening the operation time, reducing bleeding, and minimizing the risk of surgery. It is widely used in surgical operations due to its high efficiency and reliability compared to traditional suture ligation.

[0003] Most of the existing high-frequency electrosurgical instruments are disposable instruments, which are discarded after completing an operation and have a high cost of use. If reusable instruments are made to reduce the cost of use, on the one hand, the service life of the components must be considered. Usually, components with short service life, easy wear, easy corrosion and low cost are made disposable, while components with long service life, high reliability and high cost are made reusable; on the other hand, the cleaning, disinfection and sterilization of the instruments after the operation must be considered. Therefore, the design of the instrument must ensure that the blood or tissue fluid that has flowed into the lumen of the instrument after the previous operation can be easily cleaned. Otherwise, even if the structure and performance of the electrosurgical instrument are still good, it cannot be used again.

[0004] In view of this, there is an urgent need to design a detachable medical device to overcome the above-mentioned defects of existing detachable medical devices. Summary of the invention

[0005] The present invention provides a detachable medical device, which makes the blade changing process simple, convenient and easy to operate.

[0006] To solve the above technical problem, according to one aspect of the present invention, the following technical solution is adopted:

[0007] A detachable medical device, comprising: a handle, a transmission device and an actuator, wherein one end of the transmission device is detachably connected to the handle, and the other end is detachably connected to the actuator; the transmission device comprises a guide mechanism and a push rod, and a clamp head is provided at the proximal end of the actuator;

[0008] One end of the guide mechanism is fixed to the handle; the pliers head is openably arranged near the other end of the guide mechanism;

[0009] The push rod is movably disposed in the guide mechanism and is detachably connected to the actuator passing through the opening of the pliers head;

[0010] In the first state, the push rod performs axial movement and circumferential rotation movement in the guide mechanism;

[0011] The actuator moves axially in the guide mechanism, and the installation and removal of the push rod and the actuator are achieved through the relative movement between the push rod and the actuator in the first state.

[0012] Preferably, one end of the push rod is inserted into the guide mechanism from the end away from the pliers head, and is detachably connected to the actuator passing through the pliers head opening.

[0013] As an embodiment of the present invention, the guide mechanism comprises an inner sleeve, a first guide portion is provided in the inner sleeve, and a third guide portion corresponding to the first guide portion is provided on the push rod;

[0014] With the cooperation of the first guide portion and the third guide portion, the push rod performs axial movement and circumferential rotation movement in the inner sleeve.

[0015] As an embodiment of the present invention, the first guide portion is a first protrusion provided on the inner wall of the inner sleeve, and the third guide portion is a first groove provided on the outer wall of the push rod and extending along an axial curve, or the first guide portion is a first groove provided on the inner wall of the inner sleeve and extending along an axial curve, and the third guide portion is a first protrusion provided on the outer wall of the push rod; through the movement of the first protrusion in the first groove, the push rod performs 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.

[0016] As an embodiment of the present invention, in the second state, the push rod performs axial movement in the guide mechanism.

[0017] As an embodiment of the present invention, a second guide portion is provided in the inner sleeve, and a fourth guide portion corresponding to the second guide portion is provided on the push rod. With the cooperation of the second guide portion and the fourth guide portion, the push rod performs axial movement in the inner sleeve.

[0018] As an embodiment of the present invention, the second guide portion is a second protrusion arranged axially on the inner sleeve, and the fourth guide portion is a second groove arranged on the push rod corresponding to the second protrusion; or, the second guide portion is a second groove arranged axially on the inner sleeve, and the fourth guide portion is a second protrusion arranged on the push rod corresponding to the second groove, and the push rod moves axially in the inner sleeve through the movement of the second protrusion in the second groove. The second groove may be a linear groove.

[0019] As an embodiment of the present invention, the guide mechanism also includes a guide support member, which is provided with a limit support portion arranged parallel to the axial direction of the inner sleeve, and the limit support portion is a linear groove. One end of the actuator is open, and the side wall of the open end of the actuator abuts against the inner walls of both sides of the linear groove, and makes reciprocating axial motion along the inner walls of both sides of the linear groove, and is detachably connected to the distal end of the push rod after the proximal end of the actuator passes through the linear groove.

[0020] As an embodiment of the present invention, the strip-shaped protrusion passes through the opening end of the actuator and its two sides respectively abut against the two side walls of the actuator, and the actuator performs reciprocating axial motion under the guidance of the strip-shaped protrusion. The strip-shaped protrusion plays a guiding role; preferably, when the actuator is a blade, especially when the blade is relatively thin, the strip-shaped protrusion plays a guiding role and can also prevent the blade opening end from deforming, especially preventing the two sides of the blade opening end from opening and shrinking.

[0021] As an embodiment of the present invention, the actuator is a blade, one end of the actuator is open, a first connection mechanism is provided at the open end of the actuator, a second connection mechanism corresponding to the first connection mechanism is provided on the push rod, and the installation and removal of the first connection mechanism and the second connection mechanism are achieved through the movement coordination of the push rod in the first state and the second state. Wherein, the actuator is a blade, the blade is an open long flat structure, the first connection mechanism is a blade clamping part formed by an inward concave, and the second connection mechanism is a push rod clamping part corresponding to the blade clamping part, and the installation and removal of the blade and the actuator are achieved through the relative movement of the blade clamping part and the push rod clamping part in the second state.

[0022] As an embodiment of the present invention, the actuator is a blade. When installing the blade, after the push rod passes through the first state and the second state, the push rod rotates a certain angle in the first direction 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 pliers head through the guide support, moves axially to the second connecting mechanism, and then continues to be pushed in the direction away from the opening of the pliers head until the first connecting mechanism of the blade abuts against the second connecting mechanism on the push rod, and the push rod is rotated a certain angle in the second direction after passing through the second state, and the first connecting mechanism and the second connecting mechanism are completely clamped, thereby realizing the installation of the blade and the push rod;

[0023] When in working state, the push rod enters a first state, and the blade moves axially along with the push rod;

[0024] When removing the blade, the push rod is pushed axially toward the opening direction close to the pliers head. After the push rod passes through the first state and the second state in sequence, the push rod is rotated toward the first direction by a certain angle relative to the blade clamping part, and the second connecting mechanism of the push rod is completely disengaged from the first connecting mechanism of the blade. The blade is removed from the push rod and taken out through the jaws to complete the removal of the blade.

[0025] Specifically, the purpose of the detachable medical device provided by the present invention is to realize the installation and removal of the cutting blade from the jaws of the pliers head and the push rod, so as to replace the cutting blade. However, during use, the entire device has two states: one is the installation and removal state, and the other is the normal working state.

[0026] More specifically, under normal working conditions: the blade clamping portion and the push rod clamping portion are clamped with each other and are in a clamped state, and the push rod performs linear motion through the cooperation between the second guide portion and the fourth guide portion. At the same time, the blade is restricted in the groove of the guide support member. At this time, the blade can only perform linear reciprocating motion driven by the push rod.

[0027] The beneficial effects of the present invention are as follows: the detachable medical device proposed by the present invention has a simple and convenient blade changing process and is easy to operate. The device of the present invention can be disassembled and cleaned, and in particular, all parts except the blade can be reused after being cleaned and sterilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the structure of a detachable medical device in one embodiment of the present invention.

[0029] Figure 2 Schematic diagram of the structure of a detachable medical device in one embodiment of the present invention (the handle and the blade are detachable).

[0030] Figure 3Schematic diagram of the structure of a detachable medical device in one embodiment of the present invention (handle, blade body and blade are detachable).

[0031] Figure 4 It is a partial structural schematic diagram of a detachable medical device in one embodiment of the present invention.

[0032] Figure 5 Schematic diagram of removing a blade from a detachable medical device according to an embodiment of the present invention.

[0033] Figure 6 FIG. 1 is a partially exploded schematic diagram of a detachable medical device in one embodiment of the present invention.

[0034] Figure 7 It is a schematic structural diagram of a detachable medical device blade and a guide support member in one embodiment of the present invention.

[0035] Figure 8 It is a schematic structural diagram of a guide support member in one embodiment of the present invention.

[0036] Fig. 9 Schematic diagram of the structure of a blade in one embodiment of the present invention.

[0037] Fig.10 It is a partial structural schematic diagram of a blade in one embodiment of the present invention.

[0038] Fig.11 It is a partial structural schematic diagram of a blade in one embodiment of the present invention.

[0039] Fig.12 It is a partial structural schematic diagram of a detachable medical device in one embodiment of the present invention.

[0040] Fig.13 Schematic diagram of the structure of a detachable medical device clamp in one embodiment of the present invention.

[0041] Fig.14 It is a partial structural schematic diagram of a detachable medical device in one embodiment of the present invention (knife removal process).

[0042] Fig.15 for Fig.14 A partial enlarged view of .

[0043] Fig.16 Schematic diagram of the cooperation between the pusher rod and the blade in one embodiment of the present invention (the pusher rod's pusher surface pushes the blade's pushed surface).

[0044] Fig.17 It is a schematic diagram of the cooperation between the push-knife rod and the blade in one embodiment of the present invention (the first connecting mechanism / the push-knife rod clamping portion cooperates with the second connecting mechanism / the blade clamping portion).

[0045] Fig.18 for Fig.17 AA section view.

[0046] Fig.19 Schematic diagram of the cooperation between the second groove and the second protrusion of the detachable medical device in one embodiment of the present invention.

[0047] Fig. 20 Schematic diagram of a partial structure of a detachable medical device in one embodiment of the present invention (returning process).

[0048] Fig.21 It is a schematic diagram of the structure of pushing the pusher rod to move linearly away from the pliers head in one embodiment of the present invention.

[0049] Fig. 22 It is a schematic diagram of the clamping state of the first connecting mechanism / knife push rod clamping portion and the second connecting mechanism / blade clamping portion in one embodiment of the present invention.

[0050] Fig.23 It is a schematic diagram of the cooperation state between the second groove and the second protrusion in one embodiment of the present invention.

[0051] Fig.24 for Fig.23 AA section view.

[0052] Fig.25 It is a schematic diagram of the relative positions of the pusher rod, the blade and the inner sleeve in one embodiment of the present invention.

[0053] Fig.26 It is a partial structural schematic diagram of a detachable medical device knife-pushing rod in one embodiment of the present invention.

[0054] Fig. 27 It is a schematic diagram of the first protrusion entering the first groove and the pusher rod rotating in one embodiment of the present invention.

[0055] Fig.28 It is a schematic diagram of the first connection mechanism / knife push rod clamping portion and the second connection mechanism / blade clamping portion being disengaged in one embodiment of the present invention.

[0056] Fig.29 for Fig.28 A-direction view.

[0057] Fig.30 Schematic diagram of the relative position between the push cutter rod and the inner sleeve after the push cutter rod rotates in one embodiment of the present invention.

[0058] Fig.31 Schematic diagram of the initial pushing state of the pusher rod in one embodiment of the present invention.

[0059] Fig.32 Schematic diagram of locking the blade push rod and the blade in one embodiment of the present invention.

[0060] Fig.33 for Fig.32 A-direction view.

[0061] Fig.34 It is a schematic diagram of the structure of the cooperation between the pusher rod and the blade in one embodiment of the present invention.

[0062] Fig.35 for Fig.34 AA section view.

[0063] Fig.36 for Fig.34 BB section view.

[0064] Fig.37 This is a schematic diagram of a first connection mechanism / push rod clamping portion and a second connection mechanism / blade clamping portion being completely clamped in one embodiment of the present invention.

[0065] Fig.38 It is a schematic diagram of the clamping / engagement between the push-blade rod and the blade in one embodiment of the present invention.

[0066] Fig.39 for Fig.38 AA section view.

[0067] Fig.40 This is a partial schematic diagram of a blade installation completed in one embodiment of the present invention.

[0068] Fig.41 This is a partial schematic diagram of a blade installation completed in one embodiment of the present invention.

[0069] Fig.42 Schematic diagram of the structure of the knife push rod in one embodiment of the present invention.

[0070] Fig.43 Schematic diagram of the structure of the first connecting mechanism / push rod clamping portion in one embodiment of the present invention.

[0071] Fig.44 Schematic diagram of the structure of the buckle mechanism of the knife push rod in one embodiment of the present invention.

[0072] Fig.45 Schematic diagram of the structure of the inner sleeve in one embodiment of the present invention.

[0073] Fig.46 4 is a cross-sectional view of an inner sleeve in one embodiment of the present invention.

[0074] Fig.47 FIG. 4 is an axial view of an inner sleeve in one embodiment of the present invention. DETAILED DESCRIPTION

[0075] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0076] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0077] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar prior art means and some technical features in the embodiments are mutually replaced within the scope of the present invention.

[0078] In the specification, helicoidal motion is a spatial transformation, which refers to the product of a rotation in space and a translation transformation whose moving direction is parallel to the rotation axis. The distal end in the specification is the end away from the handle 1, and the proximal end is the end close to the handle 1. The first state and the second state in the specification can be the state of the pusher rod 22 or the state of the buckle mechanism 220 (wherein the buckle mechanism 220 is a part of the pusher rod).

[0079] The present invention discloses a detachable medical device, which comprises a handle 1, a transmission device (including a blade 2) and an execution device (including a blade 3) (refer to Figure 3 ),like Figures 1 to 3 It is a schematic diagram of the structure of the detachable medical device of the present invention from the integral to the detachable, wherein one end of the transmission device is detachably connected to the handle 1, and the other end is detachably connected to the execution device.

[0080] See also Figures 4 to 6 FIG. 1 is a schematic diagram of a structure in which an actuator is detached from a transmission device in an embodiment of the present invention in a detachable medical device of the present invention, wherein the transmission device may be a power transmission structure including a blade body 2, and the actuator may be a distal end actuator for cutting tissue according to the power transmitted by the transmission device. It can be understood that the actuator includes a blade 3, and at this time, one end of the blade body 2 is detachably connected to the handle 1, and the other end is detachably connected to the blade 3 (refer to FIG. 1 ). Figure 4 ), wherein the blade 3 is used to cut human tissue, especially in the case of using an electrosurgical instrument to close a blood vessel and then cut off the closure band by using the blade during surgery. In other preferred embodiments, the execution device can also be a structure of scissors, forceps, tweezers, etc.

[0081] Furthermore, the transmission device (blade body 2) includes a guide mechanism and a push rod (knife push rod 22), and the proximal end of the actuator includes a pliers head 25. Among them, one end of the guide mechanism can be detachably connected to the handle, the pliers head 25 can be opened and closed near the other end of the guide mechanism, and the push rod (knife push rod 22) is arranged in the guide mechanism and can move in the guide mechanism, so that the push rod (knife push rod 22) can be detachably connected to the actuator (blade 3) passing through the opening of the pliers head.

[0082] In the first state, the push rod (knife push rod 22) performs axial movement and circumferential rotation movement in the guide mechanism. When the actuator moves axially in the guide mechanism, the actuator is installed or removed from the push rod through the relative movement between the actuator and the push rod (knife push rod 22) in the first state.

[0083] In one embodiment, if Figure 4 As shown, the guide mechanism further includes an inner sleeve 21 .

[0084] One end of the guide mechanism including the inner sleeve 21 (such as Figure 4 , the proximal end of the inner sleeve 21) is detachably connected to the handle 1, and the pliers head 25 is openably arranged at the other end of the guide mechanism including the inner sleeve 21 (such as Figure 4 The push rod (knife push rod 22) is arranged in the inner sleeve 21 of the guide mechanism, and when installing the push rod, the push rod (knife push rod 22) is first inserted into the inner sleeve 21 (such as the distal end of the inner sleeve 21) from the end away from the clamp head 25. Figure 4 As shown in the figure, the blade 3 can be detachably connected to the blade 3 passing through the opening of the pliers head 25. The distal end of the blade 3 is used for cutting, and the proximal end is detachably connected to the blade push rod 22 and assembled together inside the inner sleeve 21 of the guide mechanism of the blade body 2; the distal end of the blade 3 is the end away from the handle 1, and the proximal end of the blade 3 is the end close to the handle 1 (as shown in the figure). Figure 5 In this embodiment, the guide mechanism may also be other structural forms including the inner sleeve 21, and the push rod may be other structural forms including the pusher rod 22, and the specific structural forms are not limited here.

[0085] In the first state, the pusher rod 22 performs axial movement and circumferential rotation movement in the inner sleeve 21 (guide mechanism) to achieve the installation and removal of the proximal end of the pusher rod and the distal end of the actuator. In the second state, the pusher rod 22 performs axial movement in the inner sleeve 21. In the first state, it can refer to the state from the beginning of contact between the proximal end of the blade 3 and the distal end of the pusher rod 22 until the installation is completed under the axial movement and circumferential rotation movement of the pusher rod 22, or the state from the beginning of separation between the proximal end of the blade 3 and the distal end of the pusher rod 22 to the completion of separation under the axial movement and circumferential rotation movement of the pusher rod 22; in the second state, it can include the process of initially moving the pusher rod 22 axially toward the direction close to the pliers head 25 (towards the distal axial direction) and pushing it into the inner sleeve 21 of the guide mechanism, at which time the pusher rod 22 does not contact the blade 3, or it can include the state that after the pusher rod 22 and the blade 3 are installed, the pusher rod 22 moves axially to drive the blade 3 installed therewith to work together. In the first state and the second state, the movement state of the blade 3 is not included. When the blade 3 is installed on the push rod 22 or separated and disassembled from the push rod 22, it is mainly achieved by the movement state of the push rod 22. The movement state of the blade 3 is mainly the movement state when installed axially toward the proximal end and / or the movement state of complete disassembly / separation toward the distal end.

[0086] In more detail, when the handle 1 and the blade body 2 are in a separated state, the blade 3 and the pusher rod 22 can be installed and removed; at this time, the blade 3 cooperates with the pusher rod 22 in the first state and the second state in the inner sleeve 21 (performing reciprocating axial and rotational motion) to control the relative movement between the connection part between the distal end of the pusher rod 22 and the proximal end of the blade 3 (performing circumferential rotational motion while performing axial motion, including but not limited to spiral motion), thereby realizing the installation and removal of the pusher rod 22 and the blade 3.

[0087] Figure 7 FIG. 1 is a schematic diagram of the structure of a detachable medical device blade and a guide support member in one embodiment of the present invention. Figure 6 and Figure 7 As shown, the inner sleeve 21 may further include a guide support 24 (also referred to as a blade support) for guiding the blade 3 to perform reciprocating linear motion in the axial direction, wherein: Figure 8 2 is a schematic structural diagram of a guide support member in an embodiment of the present invention along an axial section. The guide support member 24 is provided with a limit support portion (linear groove 241 ) arranged parallel to the axial direction of the inner sleeve 21 .

[0088] In one embodiment of the present invention, the limiting support portion is a linear groove 241; correspondingly, one end of the blade 3 is open, and the side walls of the open end (the proximal end of the blade 3) of the blade 3 are respectively abutted against the inner walls on both sides of the linear groove 241, so that the blade 3 can make reciprocating axial motion under the guidance of the linear groove 241, and after its proximal end passes through the linear groove 241, it can be detachably connected with the distal end of the push rod 22 passing through the inner sleeve 21.

[0089] In one embodiment, a strip-shaped protrusion 242 is further provided on the guide support 24 , and the blade 3 moves axially under the guidance of the strip-shaped protrusion 242 . Fig. 9 FIG. 1 is a schematic diagram of the structure of a blade in one embodiment of the present invention. Fig. 9 As shown, one end (proximal end) of the blade 3 is provided with an opening, that is, the blade 3 presents a long U-shaped flat structure with an opening (of course, it can also be other structures). When the strip-like protrusion 242 cooperates with the blade 3, the strip-like protrusion 242 passes through the open end of the blade 3 and its two sides respectively abut against the two side walls of the actuator, so that the strip-like protrusion 242 is arranged in the hollow area of ​​the blade 3, that is, the blade 3 is a U-shaped blade, and the strip-like protrusion 242 is clamped between the two side walls of the blade 3, so as to further strengthen the guidance of the U-shaped blade and prevent the deformation of the blade 3.

[0090] In one embodiment, the inner sleeve 21, the guide support member 24 and the clamp head 25 may be an integrally formed structure or a structure in which multiple components are assembled into one.

[0091] Figure 10 to Figure 11 FIG. 1 is a schematic diagram of the proximal end structure of a blade detachably connected to the blade push rod 22 in one embodiment of the present invention; please refer to FIG. Figures 9 to 11 The opening end (proximal end) of the blade 3 is provided with a first connecting mechanism (snapping structure 31), wherein the first connecting mechanism (snapping structure 31) is a snap-fitting mechanism formed by the inner wall being recessed radially outward, and the snap-fitting structure 31 includes a blade snap-fitting portion 32 and a blade pushed surface 33 (reference Fig.10 and Fig.11 The buckle structure 31 that realizes detachable connection with the pusher rod 22 includes a buckle mechanism formed by a middle depression (refer to Fig.10 and Fig.11 ).

[0092] See also Figure 6 , Fig.13 , Fig.15 ,and Figures 21 to 41 In one embodiment of the present invention, a buckle mechanism 220 corresponding to the buckle structure 31 is provided at the distal end of the blade push rod 22, so as to be connected, clamped or disassembled with the buckle structure 31 at the proximal end of the blade 3. Figure 42 to Figure 44 This is a schematic diagram of the structure of the pusher rod in one embodiment of the present invention; please refer to Figure 42 to Figure 44In one embodiment of the present invention, the buckle mechanism 220 is provided with a push rod clamping portion 223 and a push blade surface 224 (refer to Fig.43 and Fig.44 ), the buckle mechanism 220 can lock the buckle structure 31 of the blade 3.

[0093] When the buckle mechanism 220 is in the first position interval of the inner sleeve 21 (corresponding to the above-mentioned second state, which may include the state where the pusher rod 22 is not in contact with the blade 3, and the state from the pusher rod 22 and the blade 3 being installed to the beginning of separation), the buckle mechanism 220 can move axially along the inner sleeve 21. When the buckle mechanism 220 is in the second position interval of the inner sleeve 21 (corresponding to the above-mentioned first state, which may include the state where the blade 3 is just contacted by the pusher rod 22 to the state where the installation is completed, and the state where the blade 3 and the pusher rod 22 are just released to the state where the separation is completed), the buckle mechanism 220 can make axial movement under the restriction of the inner sleeve 21 while performing circumferential rotational movement (also referred to as spiral movement) to clamp or disengage with the buckle structure 31, thereby achieving installation or removal of the blade 3. In a preferred embodiment, the buckle structure 31 includes two L-shaped connection mechanisms, and correspondingly, the distal end of the pusher rod 22 is provided with an inverted L-shaped connection mechanism corresponding to the L-shaped connection mechanism. The state when the buckle mechanism 31 is clamped with the pusher rod 22 can refer to Fig.38 shown.

[0094] See also Fig.12 As shown, in one embodiment, the blade body 2 also includes a reset mechanism 23, wherein the reset mechanism 23 is arranged in the inner sleeve 21, and the reset mechanism 23 cooperates with the push knife rod 22 to enable the push knife rod 22 to actively reset after the cutting is completed. Preferably, the reset mechanism 23 is a reset spring. Specifically, in the working state of pushing the push knife rod 22 to move toward the distal end after the detachable medical device is installed, the reset mechanism 23 is in a stretched state and provides a reset force for the push knife rod 22 to move toward the proximal end. After the push knife rod 22 completes the cutting, it is at the farthest end. At this time, the reset force on the push knife rod 22 is the largest. When no external force is applied to the push knife rod 22, that is, the push knife rod 22 is not subjected to external force, the push knife rod 22 moves toward the proximal end under the reset force toward the proximal end generated by the reset mechanism 23 and returns to the initial position when the knife is out.

[0095] For further information, see Figures 13 to 44 In one embodiment of the present invention, a first guide portion is provided inside the inner sleeve 21 to guide the pusher rod 22 to make axial movement and rotational movement at the same time, and a third guide portion corresponding to the first guide portion is provided on the pusher rod 22. With the cooperation of the first guide portion and the third guide portion, the pusher rod 22 can make axial movement and circumferential rotational movement in the inner sleeve. In detail, the first guide portion can be a first protrusion 212 provided on the inner wall of the inner sleeve, and preferably, the first protrusion 212 can be a cylindrical protrusion (such as Figure 26-27 Correspondingly, the third guide portion may be a first groove 222 (such as Fig. 22 As shown), preferably, the first groove 222 may be a spiral groove, but may also be other structures.

[0096] Under the guidance of the first protrusion 212 and the first groove 222, the push rod 22 can make axial movement and circumferential rotation movement in the inner sleeve 21. In another embodiment of the present invention, the first guide portion is a first groove 222 provided on the inner wall of the inner sleeve 21 and extending along the axial curve, and the third guide portion is a first protrusion 212 provided on the outer wall of the push rod, and the working principle is the same as above.

[0097] Figure 45 to Figure 47 This is a schematic diagram of the structure of the inner sleeve in one embodiment of the present invention; please refer to Figure 45 to Figure 47 , and combined with Figures 15 to 41 In one embodiment of the present invention, a second guide portion is provided in the inner sleeve 21, wherein the second guide portion may be a second protrusion 211 arranged axially on the inner sleeve, the second protrusion 211 may be a linear protrusion, or other structures, and a fourth guide portion corresponding to the second guide portion is provided on the push rod (it may be a second groove 221 arranged on the push rod corresponding to the second protrusion 211, the second groove 221 may be a linear groove, or other structures), and with the cooperation of the second protrusion 211 and the second groove 221, the push rod 22 performs axial movement in the inner sleeve 21. Fig.41 As shown, the second protrusion 211 is an extension portion arranged parallel to the axial direction, and the axial side outer wall of the extension portion abuts against the two side walls of the second groove 221. Furthermore, linear guide stripes can be provided on the two side walls in contact with the second groove 221 to further limit the pusher rod 22 to prevent it from rotating, without specific limitation; in other embodiments, the second protrusion 211 can also be a strip-shaped protrusion arranged along the axial direction.

[0098] In one embodiment, the first groove 222 and the second groove 221 may be disposed together with the buckle mechanism 220 at the distal end of the knife-pushing rod 22 , and the buckle mechanism 220 is located near the distal end of the knife-pushing rod 22 .

[0099] Please refer again Fig.26In one embodiment, when the buckle mechanism 220 is in the first state (the state in which the first protrusion 212 is located in the first groove 222 and the second protrusion 211 leaves the second groove 221), when the pusher rod 22 is subjected to a set force (such as a force toward the distal end or the proximal end), the first groove 222 restricts and guides the first protrusion 212, and relative sliding occurs between the first groove 222 and the first protrusion 212, so that the buckle mechanism 220 can spirally move toward the distal end or the proximal end (such as Fig. 27 , Fig.28 When the pusher rod 22 (the buckle mechanism 220) is in the second state (the state where the first protrusion 212 is separated from the first groove 222 and is located in the second groove 221), when the pusher rod 22 is subjected to a setting force, the buckle mechanism 220 on the pusher rod 22 moves axially (as shown in FIG. Fig.31 shown).

[0100] In one embodiment of the present invention, the detachable medical device further includes a first critical point and a second critical point. In this process, the detachable medical device switches between the first state and the second state through the conversion of the different critical points of the state, that is, the pusher rod 22 switches between the axial movement and the spiral movement (of course, it can also be other forms of "axial movement and circumferential rotation movement").

[0101] Specifically, at the first critical point, the first protrusion 212 is located at the farthest end of the first groove 222 (i.e., the distal side end of the first groove 222), and the second protrusion 211 is located at the nearest end of the second groove 221. Fig.26 , Fig.40 As shown), the push rod 22 in this state includes the state when the second state ends and the first state begins, and also includes the state when the first state ends and the second state begins.

[0102] At the second critical point, the first protrusion 212 is located at the innermost end of the first groove 222 (i.e., the proximal side end of the first groove 222). At this time, the pusher rod 22 moves through the first state to the state at the end of the first state (e.g., Fig. 27 and Fig.34), at which time the second protrusion 211 is away from the second groove 221. Further, when the proximal end of the blade 3 and the distal end of the pusher rod 22 are fully installed, the pusher rod 22 cannot further move toward the distal end relative to the blade 3 due to the restriction of the innermost end of the second groove 222 on the first protrusion 212. When installing the blade 3, the pusher rod 22 is pushed axially to the farthest end of the inner sleeve 21, and the pusher rod 22 is rotated a certain angle relative to the inner sleeve 21. At this time, the pusher rod 22 is at the first critical point. At the same time, the blade 3 is pushed axially from the distal end toward the direction close to the inner sleeve 21 and gradually approaches the pusher rod 22. When the blade 3 begins to contact the pusher rod 22 until the blade pushed surface 33 contacts the pusher surface 224, the pusher rod 22 is at the second critical point (the first protrusion 212 is located at the innermost end of the first groove 222); the pusher rod 22 is pushed axially toward the direction close to the blade 3. During this process, the pusher rod 22 enters the first state from the first critical point, and the pusher rod 22 (the farthest end of the pusher rod 22) makes a spiral motion relative to the blade 3 (the closest end of the blade 3). At this time, the buckle structure 31 of the blade 3 begins to be gradually locked by the buckle mechanism 220, that is, during this process, the pusher rod 22 makes a spiral motion, and the blade 3 moves axially, and a circumferential displacement and an axial displacement are generated between the buckle structure 31 and the buckle mechanism 220. At this time, the pusher rod clamping part 223 and the blade clamping part 32 go from initial contact to gradual clamping, so as to complete the installation of the blade 3; it can be understood that the contact surface where the buckle structure 31 and the buckle mechanism 220 are gradually clamped can be an inclined surface for smoothly realizing the relative motion, and there is no specific limitation.

[0103] When the blade 3 is removed, the pusher rod 22 returns to the initial state of the blade through axial movement (moves axially toward the proximal end) and is at the second critical point; since the pusher rod clamping portion 223 is in contact with the blade clamping portion 32, when the pusher rod 22 is pushed by the proximal force, the pusher rod clamping portion 223 applies a proximal thrust to the blade clamping portion 32, so that the pusher rod 22 enters the first state from the second critical point. At this time, the medical device is in the state of starting to remove the blade 3 (the pusher rod clamping portion 223 begins to separate from the blade clamping portion 32). In the first state In this state, the push knife rod 22 makes a spiral motion under the guidance of the first protrusion 212 and the first groove 222, and correspondingly, the push rod clamping part 223 of the push knife rod 22 is gradually separated from the blade clamping part 32 due to the spiral motion of the push knife rod 22. When the push knife rod 22 is at the first critical point, the separation of the blade clamping part 32 of the blade 3 and the push rod clamping part 223 of the push knife rod 22 is completed (at least completely disengaged along the circumferential direction). At this time, the blade 3 is axially moved toward the distal end (opposite to the moving direction of installation) to be removed, thereby realizing the disassembly of the blade 3.

[0104] Specifically, in the first state, the installation and separation parts of the blade clamping portion 32 and the push rod clamping portion 223 are outside the inner sleeve 21, so the inner sleeve 21 does not affect the installation and removal of the blade 3.

[0105] In one embodiment of the present invention, the detachable medical device of the present invention is in the knife-out state: the pusher rod 22 enters the second state again (the pusher rod 22 moves axially) from the end of the first state. At this time, since the blade 3 is mounted on the pusher rod 22, the pusher surface 224 pushes the pushed surface 33 of the blade to move axially in the direction close to or away from the pliers head (such as Figures 14 to 16 As shown), the blade 3 moves along the axial direction toward the distal end along with the push rod 22. In this state, the blade clamping portion 32 cooperates with the push rod clamping portion 223, and the blade 3 cannot be separated from the push rod 22 (as shown). Fig.17 , Fig.18 The inner sleeve 21 has a second protrusion 211 in the second groove 221 to limit the rotation of the pusher rod 22 (as shown in FIG. Fig.19 The blade 3 is restricted by the guide support 24 and cannot rotate (as shown). Fig. 20 shown).

[0106] When the detachable medical device is in the knife-returning state under the action of the reset mechanism 23, the knife-pushing rod 22 is in the second state (the knife-pushing rod 22 moves axially). At this time, the push rod clamping portion 223 clamps the blade clamping portion 32 to drive the blade 3 to move axially in the inner sleeve 21 in the direction away from the clamp head 25 (such as Fig. 20 , Fig.21 In this state, the blade clamping portion 32 cooperates with the push rod clamping portion 223, and the blade 3 cannot be separated from the push rod 22 (as shown in FIG. Fig. 22 As shown), the inner sleeve 21 has a second protrusion 211 in the linear groove 221, which limits the rotation of the pusher rod 22 (as shown in FIG. Fig.23 , Fig.24 As shown), the blade 3 is restricted by the guide support 24 and cannot rotate.

[0107] In one use scenario of the present invention, the process of installing a blade on the detachable medical device of the present invention is as follows:

[0108] (1) Push the distal end of the pusher rod 22 into the inner sleeve 21 from the proximal side of the inner sleeve 21, and push the distal end of the pusher rod 22 axially to the farthest end of the inner sleeve 21 so as to protrude from the distal end port of the inner sleeve 21, so that the pusher rod 22 enters the first state from the second state and is at the first critical point.

[0109] (2) Open the jaws 25 and insert the blade 3 axially into the inner sleeve 21 through the jaws 25 via the strip-shaped protrusions 242 of the guide support member 24 , and gradually approach the distal end of the blade push rod 22 .

[0110] In this process, when the pusher rod 22 is initially pushed into the inner sleeve 21, the pusher rod 22 is in the second state (the pusher rod 22 moves axially); after entering the first critical point, the pusher rod 22 enters the first state, at which time the pusher rod 22 moves axially in a spiral motion, and finally enters the second critical point. In this state, the pusher rod 22 is rotated along the axial center axis by a certain angle, so that the buckle mechanism 220 rotates circumferentially to realize that the pusher clamping portion 223 completely avoids the movement space of the blade 3 (such as Fig.29 As shown) to further achieve installation with the blade clamping portion 32 of the blade 3.

[0111] (3) Slowly remove the pushing source of the pusher rod and continue to push the blade 3 into the inner sleeve 21; when the pushed surface 33 of the blade meets the pushing surface 224 of the pusher rod 22, the pushed surface 33 of the blade applies a force to the pushing surface 224, so that the pusher rod 22 begins to move proximally under the thrust applied by the blade 3. At this time, the pusher rod 22 enters the first state and performs a spiral motion; and the blade clamping portion 32 of the blade 3 begins to be gradually clamped and locked with the pusher clamping portion 223. In this process, due to the spiral motion of the pusher rod 22, the blade 3 moves axially, which can cause a circumferential displacement and an axial displacement between the buckle structure 31 and the buckle mechanism 220.

[0112] More specifically, the first protrusion 212 of the inner sleeve 21 is in the first groove 222 (such as Fig.38 Under the guidance of the guide support 24 (as shown in the figure), the pusher rod 22 makes a circumferential rotational motion while moving axially; while the blade 3 cannot rotate due to the limitation of the limiting support portion (linear groove 241) of the guide support member 24.

[0113] (4) When the first state of the blade push rod 22 ends and the blade 3 is at the second critical point, the blade 3 is locked by the buckle mechanism 220, that is, the push rod clamping portion 223 and the blade clamping portion 32 are locked with each other (such as Fig.28 ).

[0114] (5) Working state (knife out / knife back state): The jaws are closed, and the knife push rod 22 is in the second state under the action of the second groove 221 and the second protrusion 211. At this time, the knife push rod 22 can only move axially. Since the push rod clamping part 223 and the blade clamping part 32 are clamped and locked, the blade 3 is driven to move axially together.

[0115] During this process, the first protrusion 212 of the inner sleeve 21 moves toward the proximal end along the distal outlet of the first groove 222 of the pusher rod 22, so as to finally achieve the clamping of the blade push surface 33 and the pusher surface 224 (such as Fig.40At the same time, the second protrusion 211 of the inner sleeve 21 is disengaged from the second groove 221 of the pusher rod 22 (as shown in FIG. Fig.26 shown).

[0116] In one use scenario of the present invention, the process of removing the blade of the detachable medical device of the present invention is as follows:

[0117] (1) Open the jaws and push the push rod 22; during this process, the push rod 22 is in the second state and can only make a single axial movement. Fig.13 , Fig.14 .

[0118] In this process, since the push rod clamping portion 223 contacts the blade clamping portion 32, the push rod clamping portion 223 applies a proximal thrust to the blade clamping portion 32, and the blade 3 moves axially toward the proximal end following the pusher rod 22. In the second state, since the second groove 221 of the pusher rod 22 is matched with the second protrusion 211 of the inner sleeve 21, and the blade 3 is restricted in the set groove by the guide support 24, the blade 3 and the pusher rod 22 can only move axially.

[0119] (2) Continue to push the blade push rod 22, and start to remove the blade 3. The push rod clamping portion 223 begins to separate from the blade clamping portion 32 and enters the second critical point.

[0120] During this process, the second groove 221 of the pusher rod 22 is separated from the second protrusion 211 of the inner sleeve 21, and at the same time, the first protrusion 212 on the inner sleeve 21 meets the first groove 222 on the pusher rod 22 (such as Fig.26 , Fig. 27 shown).

[0121] (3) After passing the second critical point, the pusher rod 22 enters the first state, and the pusher rod 22 spirally moves toward the distal end until the pusher rod clamping portion 223 is separated from the blade clamping portion 32 (at least the circumferential separation is achieved). At this time, the pusher rod 22 is at the first critical point (the first protrusion 212 is disengaged from the first groove 222 on the pusher rod 22). The blade 3 is removed by moving it out axially.

[0122] In this process, when the pusher rod 22 is at the second critical point, the blade 3 is completely separated from the buckle mechanism 220, and since a portion of the blade 3 is outside the inner sleeve 21, the blade 3 can be smoothly removed. Furthermore, at this time, the pusher rod 22 can be further restricted from moving axially toward the distal end, that is, the pusher rod 22 can no longer move toward the distal end to prevent the blade 3 and the buckle mechanism 220 from interfering with each other and affecting the smooth removal of the blade 3.

[0123] In one usage scenario of the present invention, the detachable medical device of the present invention can be a high-frequency electrosurgical instrument; during the operation, its usage is the same as that of the existing high-frequency electrosurgical instrument. When a scalpel is needed, the blade is installed into the blade body according to the above operation. During the operation, the medical staff can adjust the position of the blade through the handle; for example, during the operation, the handle can be held, and the blade extends to perform the operation; after using the instrument, the handle can be released, and the blade retracts. After the operation is completed, it is only necessary to remove the blade according to the above-mentioned operation of disassembling the blade, and the other parts of the high-frequency electrosurgical instrument can be reused after cleaning and sterilization.

[0124] In summary, the detachable medical device proposed by the present invention can improve the reusability of some parts of the device because it can realize the full disassembly of each component, and by moving the blade relative to the pusher rod to realize the detachable installation with the pusher rod (push rod), the replacement process of the parts to be replaced is simple, convenient and easy to operate. Most of the parts of the device of the present invention are reusable, the device can be disassembled and cleaned, and the parts except the execution parts such as the blade can be reused after cleaning and sterilization.

[0125] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The description and application of the present invention here are illustrative and are not intended to limit the scope of the present invention to the above-described embodiments. The deformation and changes of the embodiments disclosed here are possible, and the replacement of the embodiments and the various components equivalent to those of ordinary skill in the art are well known. It should be clear to those skilled in the art that the present invention can be realized in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential characteristics of the present invention. Other deformations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the present invention.

Claims

1. A detachable medical device, comprising: 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 is detachably connected to the execution device, characterized in that the transmission device comprises a guide mechanism and a push rod, and a clamp head is provided at the proximal end of the execution device; One end of the guide mechanism can be detachably connected to the handle; the pliers head can be opened and closed near the other end of the guide mechanism; The push rod is movably disposed in the guide mechanism and is detachably connected to the actuator passing through the opening of the pliers head; In the first state, the push rod performs axial movement and circumferential rotation movement in the guide mechanism; The actuator moves axially in the guide mechanism, and the push rod and the actuator are installed and removed by relative movement between the actuator and the push rod in the first state; the guide mechanism includes an inner sleeve, a first guide portion is provided in the inner sleeve, and a third guide portion capable of cooperating with the first guide portion is provided on the push rod; Under the cooperation of the first guide part and the third guide part, the push rod can make axial movement in the inner sleeve and circumferential rotation movement at the same time; in the second state, the push rod can make axial movement in the guide mechanism; The execution device is a blade, one end of the execution device blade is open, the open end of the execution device blade is provided with a first connection mechanism, the push rod is provided with a second connection mechanism corresponding to the first connection mechanism, and the first connection mechanism and the second connection mechanism are installed and disassembled through the movement cooperation between the push rod in the first state and the second state; The guide mechanism further comprises a guide support member, on which a limit support portion is arranged 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 open end of the actuator respectively abuts against the inner walls of both sides of the linear groove, and makes reciprocating axial motion along the inner walls of both sides of the linear groove, and is detachably connected to the push rod after the proximal end of the actuator passes through the linear groove; When installing the blade, after the push rod passes through the first state and the second state, the push rod rotates a certain angle in the first direction relative to the guide mechanism to avoid the first connection mechanism of the blade, the blade is inserted into the inner sleeve from the opening of the pliers head through the guide support, moves axially to the second connection mechanism, and then continues to be pushed in the direction away from the opening of the pliers head until the first connection mechanism of the blade abuts against the second connection mechanism on the push rod, the push rod is rotated a certain angle in the second direction, the first connection mechanism and the second connection mechanism are completely clamped, and the installation of the blade and the push rod is achieved; When in working state, the push rod enters a first state, and the blade moves axially along with the push rod; When removing the blade, the push rod is pushed axially toward the opening direction close to the pliers head. After the push rod passes through the first state and the second state in sequence, the push rod is rotated toward the first direction by a certain angle relative to the blade clamping part, and the second connecting mechanism of the push rod is completely disengaged from the first connecting mechanism of the blade. The blade is taken out through the pliers head to complete the removal of the blade.

2. The detachable medical device according to claim 1, characterized in that: The first guide portion is a first protrusion provided on the inner wall of the inner sleeve, and the third guide portion is a first groove provided on the outer wall of the push rod and extending along an axial curve, or the first guide portion is a first groove provided on the inner wall of the inner sleeve and extending along the axial direction, and the third guide portion is a first protrusion provided on the outer wall of the push rod; through the movement of the first protrusion in the first groove, the push rod makes axial movement in the inner sleeve and circumferential rotational movement at the same time.

3. The detachable medical device according to claim 1, characterized in that: A second guide portion is provided in the inner sleeve, and a fourth guide portion corresponding to the second guide portion is provided on the push rod. With the cooperation of the second guide portion and the fourth guide portion, the push rod performs axial movement in the inner sleeve.

4. The detachable medical device according to claim 3, characterized in that: The second guide portion is a second protrusion axially arranged on the inner sleeve, and the fourth guide portion is a second groove arranged on the push rod corresponding to the second protrusion; or, the second guide portion is a second groove axially arranged on the inner sleeve, and the fourth guide portion is a second protrusion arranged on the push rod corresponding to the second groove, and the push rod makes axial movement in the inner sleeve through the movement of the second protrusion in the second groove.

5. The detachable medical device according to claim 4, characterized in that: The guide support is also provided with a strip-shaped protrusion, which passes through the open end of the actuator and has two sides respectively abutting against the two side walls of the actuator. The actuator performs reciprocating axial motion under the guidance of the strip-shaped protrusion.

Images