CN111920478A

CN111920478A - Ultrasonic knife capable of quickly replacing sleeve

Info

Publication number: CN111920478A
Application number: CN202010801159.9A
Authority: CN
Inventors: 王晓锋
Original assignee: Jiangsu Baining Yingchuang Medical Technology Co ltd
Current assignee: Jiangsu Baining Yingchuang Medical Technology Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2020-11-13

Abstract

The utility model provides a sheathed tube supersound sword of quick change, it includes cutter arbor (309), interior sleeve pipe (203) and outer tube (204), interior sleeve pipe (304) of knob, position sleeve pipe (305) and lock sleeve (307), inside and outside sleeve pipe is installed through two connectors, and interior sleeve pipe connector is the tridentate external splines, and the tridentate is asymmetric, and the outer tube connector is the keyway, can axial motion and radial rotation simultaneously, can also install the mistake proofing. The outer sleeve connector is installed with two inner grooves of the inner sleeve of the knob through two outer bosses, the two outer bosses are one large and one small, the two corresponding inner grooves are one large and one small, and the mistake proofing can be installed. After the outer sleeve connector rotates by 90 degrees, the limiting sleeve is reset after being compressed by the spring to limit. And the clamping groove of the inner sleeve connector is clamped into the cylindrical positioning pin. The outer sleeve can rotate radially, and the inner sleeve can rotate radially and pull axially. The invention has convenient assembly and disassembly and can greatly reduce the medical cost.

Description

Ultrasonic knife capable of quickly replacing sleeve

Technical Field

The invention relates to a medical instrument, in particular to an ultrasonic knife, and particularly relates to a reusable ultrasonic knife capable of quickly replacing a sleeve.

Background

As is well known, in modern surgery, an ultrasonic blade is often used to cut and coagulate blood at a lesion. The ultrasonic scalpel has small damage to surrounding tissues, can separate and cut the tissues beside important visceral organs and large blood vessels, has less smoke and eschar, ensures that the visual field of the laparoscopic surgery is clearer, shortens the surgery time, has no current and more convenient operation through a human body, and reduces the occurrence of complications. The difficulty of the operation is reduced, the bleeding amount in the operation is also reduced, and the tumor-free principle of the operation is better met.

The ultrasonic scalpel of the prior art is a scalpel rod and a sleeve fixedly arranged on a handle, the whole ultrasonic scalpel is integrated, after the ultrasonic scalpel is used and finished every time, residues between the scalpel rod and the sleeve are not easy to clean and disinfect thoroughly, cross infection risks exist, and therefore the ultrasonic scalpel can be used only once even if the performance of an instrument is still good, and the medical cost is high.

Disclosure of Invention

The invention aims to solve the problems that the cost of instruments is high and resources are wasted because the inner sleeve and the outer sleeve are inconvenient to disinfect and need to be discarded together with valuable parts such as a cutter bar, a handle and the like in the conventional ultrasonic knife, and the ultrasonic knife with the quick-change sleeve is designed, wherein the cutter bar and the handle part which are key parts can still be continuously used only by taking down the inner sleeve and the outer sleeve which are difficult to clean and discarding. .

The technical scheme of the invention is as follows:

an ultrasonic knife capable of quickly replacing a sleeve comprises a knife bar 309, an inner sleeve 203, an outer sleeve 204, a knob inner sleeve 304, a positioning sleeve 305 and a locking sleeve 307, and is characterized in that one end of the locking sleeve 307 is screwed with one end of the positioning sleeve 305, the positioning sleeve 305 is provided with a long strip-shaped through hole 401, the other end of the positioning sleeve 305 is inserted into the knob inner sleeve 304, the knob inner sleeve 304 is provided with a pin hole 402, one end of the knife bar 309 with the pin hole 402 is inserted into the positioning sleeve 305, a knife bar pin shaft 308 penetrates through the pin hole 402 of the knob inner sleeve 304, the long strip-shaped through hole 401 and the pin hole 402 at the end part of the knife bar 309 to connect the knife bar and the positioning sleeve into a whole, and the locking sleeve 307 drives the positioning sleeve 305 to axially move, so that the; a positioning boss 306 is arranged on the inner wall of one end of the positioning sleeve 305 inserted into the knob inner sleeve 304, an inner sleeve connector 205 is arranged at one end of the inner sleeve 203, an L-shaped slot 403 into which the positioning boss 306 is inserted is arranged on the inner sleeve connector, and the inner sleeve 203 and the positioning sleeve 305 are axially connected and synchronously move through the positioning boss 306 and the L-shaped slot 403; the surface of the inner sleeve connector 205 is provided with an axial key 404, one end of the outer sleeve 204 is provided with an outer sleeve connector 206, a key slot for the axial key to insert is arranged inside the outer sleeve connector 206, and the inner sleeve 203 and the outer sleeve 204 realize circumferential constraint and axial movement through the key slot structure; the external of the outer sleeve connector 206 is at least provided with two limiting bosses 405, the knob inner sleeve 304 is provided with a limiting slot 406 into which the limiting boss 405 is inserted, the circumference of the knob inner sleeve 304 is provided with a slot 407 into which the limiting slot 406 is inserted and then rotates, the slot 407 is further connected with an axial positioning opening, the axial positioning opening is used for allowing a positioning buckle 408 to contract and enter for use against spring force, the positioning buckle 408 is symmetrically arranged on the limiting sleeve 301, the limiting sleeve 301 is sleeved on the knob inner sleeve 304, one end of the limiting sleeve 301 abuts against one end of the reset spring 302, the other end of the limiting sleeve 301 abuts against a limiting step 409 at the end part of the knob inner sleeve 304, the other end of the reset spring 302 abuts against the inner end surface of the knob 303 or an annular boss on the knob inner sleeve 304, and the knob 303 is fixed on; the limiting boss 405 is inserted into the limiting slot 406 and then rotates along the slot 407 after being in place, the elastic force of the return spring 303 is overcome in the rotating process, the positioning buckle 408 is pushed into each positioning opening to continue rotating until the limiting boss 405 passes over the positioning buckle 408, the positioning buckle 408 resets and blocks the slot 407 again, so that the limiting boss 405 is positioned in the slot 407 and cannot move, the connection between the outer sleeve and the inner sleeve 304 of the knob is realized, and the radial direction and the axial direction of the inner sleeve 304 are all positioned; when unlocking, the limiting sleeve 301 is pushed and pressed towards the direction of the knob by force, the resistance of the reset spring is overcome, the outer sleeve 204 is rotated in the opposite direction while the positioning buckle 408 enters the axial positioning opening until the limiting boss 405 is aligned with the limiting slot 406, the inner sleeve connector 205 is driven to rotate while the outer sleeve rotates, so that the inner sleeve connector 205 is separated from the positioning boss 306 on the positioning sleeve 305, the outer sleeve 204 and the inner sleeve 202 can be pulled out simultaneously, and the separation of the inner sleeve and the outer sleeve from the cutter bar 309 is realized.

The positioning boss 306 is composed of two positioning pins passing through the positioning sleeve 305.

The two limit bosses 405 are different in size to ensure correct insertion and prevent misplugging, and the size of the limit slots 406 is correspondingly adjusted.

The invention has the beneficial effects that:

1. the disassembly and the assembly are convenient and quick.

2. The medical cost is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic perspective exploded view of the present invention.

Fig. 3 is a schematic sectional structure view of fig. 1.

Fig. 4 is an exploded view of the replaceable structure of the present invention.

Figure 5 uses step one-cannula assembly threading.

Fig. 6a, using step two-outer cannula connector position.

Fig. 6b, step two-inner cannula connector position is used.

Fig. 7a, using step three-outer sleeve connector position.

Fig. 7b, step three-inner cannula connector position is used.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1-7.

An ultrasonic knife capable of realizing quick sleeve replacement is provided, which is in a shape shown in the figure and comprises a knife rod 309, an inner sleeve 203, an outer sleeve 204, a knob inner sleeve 304, a positioning sleeve 305 and a locking sleeve 307, as shown in figure 2, the rest parts are the same as the prior art, one end of the locking sleeve 307 is screwed with one end of the positioning sleeve 305, the positioning sleeve 305 is provided with a strip-shaped through hole 401, the other end of the positioning sleeve 305 is inserted into the knob inner sleeve 304, a pin hole 402 is arranged on the knob inner sleeve 304, one end of the cutter bar 309 with the pin hole 402 is inserted into the positioning sleeve 305, the cutter bar pin shaft 308 passes through the pin hole 402 of the knob inner sleeve 304, the strip-shaped through hole 401 and the pin hole 402 at the end part of the cutter bar 309 to connect the three into a whole, the locking sleeve 307 drives the positioning sleeve 305 to move axially, so that the cutter bar pin shaft 308 can drive the cutter bar 309 and the knob inner sleeve 304 to move axially along the elongated through hole 401; a positioning boss 306 (which can be realized by inserting and fixing a cylindrical pin shown in fig. 4 into the inner sleeve of the knob through the inner wall of one end of the positioning sleeve 305 inserted into the inner sleeve 304 of the knob, and the insertion end should protrude out of the inner wall to form a cylindrical positioning boss) is arranged on the inner wall of one end of the inner sleeve 203, an inner sleeve connector 205 is arranged on one end of the inner sleeve 203, an L-shaped slot 403 into which the positioning boss 306 is inserted is arranged on the inner sleeve connector, and the inner sleeve 203 and the positioning sleeve 305 are axially connected and synchronously move through the; the surface of the inner sleeve connector 205 is provided with an axial key 404, one end of the outer sleeve 204 is provided with an outer sleeve connector 206, a key slot for the axial key to insert is arranged inside the outer sleeve connector 206, and the inner sleeve 203 and the outer sleeve 204 realize circumferential constraint and axial movement through the key slot structure; at least two limiting bosses 405 are arranged outside the outer sleeve connector 206, and in specific implementation, the two limiting bosses 405 are preferably one large and one small to ensure correct insertion and prevent misplugging, and the size of the limiting slot 406 is correspondingly adjusted to one large and one small. A limiting slot 406 into which the limiting boss 405 is inserted is arranged on the knob inner sleeve 304, an open slot 407 into which the limiting slot 406 is inserted to rotate is arranged in the circumferential direction of the knob inner sleeve 304, the open slot 407 is further connected with an axial positioning opening, the axial positioning opening is used for allowing the positioning buckle 408 to contract and enter the knob inner sleeve 304 against spring force, as shown in fig. 3, the positioning buckle 408 is symmetrically arranged on the limiting sleeve 301, the limiting sleeve 301 is sleeved on the knob inner sleeve 304, one end of the limiting sleeve 301 abuts against one end of the return spring 302, the other end of the limiting sleeve 301 abuts against a limiting step 409 at the end part of the knob inner sleeve 304, the other end of the return spring 302 abuts against an inner end surface of the knob 303 or an annular boss on the knob inner sleeve 304, and the knob 303; the limiting boss 405 is inserted into the limiting slot 406 and then rotates along the circumferential groove 407, the limiting boss 405 extrudes an inclined surface opposite to the positioning buckle 408 in the rotating process, the axial component force applied to the inclined surface overcomes the elastic force of the reset spring 303, the positioning buckle 408 is pushed into the axial positioning opening to continue rotating until the limiting boss 405 passes over the positioning buckle 408, the positioning buckle 408 resets and blocks the groove 407, the vertical surface on the other side of the positioning buckle 408 abuts against the limiting boss 405, so that the limiting boss 405 is positioned in the circumferential groove 407 and cannot rotate, the connection between the outer sleeve and the inner sleeve 304 of the knob is realized, and the inner sleeve 304 is completely positioned in the radial direction and the axial direction; when unlocking, the limiting sleeve 301 is pushed and pressed towards the direction of the knob by force, the resistance of the return spring is overcome, the outer sleeve 204 is rotated in the opposite direction while the positioning buckle 408 enters the axial positioning opening until the limiting boss 405 aligns with the limiting slot 406, the inner sleeve connector 205 is driven to rotate while the outer sleeve rotates, so that the inner sleeve connector 205 is separated from the positioning boss 306 on the positioning sleeve 305, and then the outer sleeve 204 and the inner sleeve 202 can be pulled out simultaneously, so that the separation of the inner sleeve and the outer sleeve from the cutter bar 309 is realized, as shown in fig. 4.

The details are as follows:

an ultrasonic knife for quickly disassembling and assembling and replacing a sleeve (hereinafter referred to as a quick-change sleeve device). The device has two position directions in the description, and the following short for the position close to the surgical cutting part is as follows: an operation end. The part close to the hand of the doctor is hereinafter referred to as follows: and a handheld end.

Quick-change sleeve device 1 comprises: cannula assembly 2, fixed subassembly 3, handle components 4.

The sleeve assembly 2 includes: clamp 201, tissue pad 202, inner cannula 203, outer cannula 204, inner cannula connector 205, outer cannula connector 206.

Wherein: the tissue pad 202 is mounted in a slot in the jaw 210 and the inner sleeve 203 is mounted in the inner bore of the outer sleeve 204. One end of the positioning hole of the clamp 201 is connected with the operation end of the outer sleeve 204, and one end of the lug boss is arranged at the operation end of the inner sleeve 203. The inner hole of the inner sleeve connector 205 is fixed with the outer diameter of the handheld end of the inner sleeve 203, the radial direction has the requirement, the small end of the inner hole of the outer sleeve connector 206 is fixed with the handheld end of the

outer sleeve

204, and 3 key slots at the large end of the inner hole are arranged in the outer boss of the inner sleeve connector 205. After assembly, the inner sleeve connector 205 is axially pulled flexibly within the outer sleeve connector 206.

The fixing member 3 includes: the device comprises a limit sleeve 301, a return spring 302, a knob 303, a knob inner sleeve 304, a positioning sleeve 305, a positioning pin 306, a locking sleeve 307, a cutter bar pin shaft 308 and a cutter bar 309.

Wherein: the limiting sleeve 301 is arranged in a guide groove on the excircle of the knob inner sleeve 304, the return spring 302 is arranged, the knob 303 presses the spring 302, and the inner hole is fixed with the knob inner sleeve 304. The 2 positioning pins 306 are pressed into the side holes of the positioning sleeve 305 to form a positioning sleeve assembly, and the positioning sleeve assembly passes through the inner hole of the knob inner sleeve 304 and then is in threaded connection with the locking sleeve 307. The knife bar 309 passes through the inner bore of the locating sleeve 305 and aligns with the locating hole. The knife bar pin shaft 308 is inserted into the pin holes of the knob inner sleeve 304, the positioning sleeve 305 and the knife bar pin shaft 308 in sequence. After the assembly is completed: the positioning sleeve 305 is flexible to pull within the knob inner sleeve 304.

The handle assembly 4 includes: handle housing and other moving parts.

The invention has the biggest characteristic that the inner sleeve and the outer sleeve are installed through two connectors, the inner sleeve connector is a three-tooth external spline, the three teeth are asymmetric, the outer sleeve connector is a three-key groove, and can simultaneously axially move and radially rotate, and the installation and mistake proofing can be realized. The outer sleeve connector is installed with two inner grooves of the inner sleeve of the knob through two outer bosses, the two outer bosses are one large and one small, the two corresponding inner grooves are one large and one small, and the mistake proofing can be installed. After the outer sleeve connector rotates by 90 degrees, the limiting sleeve is reset after being compressed by the spring to limit. And the clamping groove of the inner sleeve connector is clamped into the cylindrical positioning pin. The outer sleeve can rotate radially, and the inner sleeve can rotate radially and pull axially. The positioning pin is in interference fit and compression joint with the positioning sleeve, the positioning sleeve is in threaded connection with the locking sleeve, two symmetrical waist-shaped holes are formed in the outer circle of the positioning sleeve, the positioning sleeve can penetrate through the cutter bar pin shaft and can slide in the direction of the waist-shaped groove in the knob inner sleeve.

The working principle of the invention is as follows:

the invention is used in the medical field, after the operation is finished, the medical staff can disassemble the sleeve pipe assembly in the used quick-change sleeve pipe device to be treated according to the disposable apparatus, and the fixing assembly can be used for repeated disinfection and sterilization.

The specific working principle is as follows:

firstly, the installation, as shown in fig. 5, one end of the sleeve assembly with a connector penetrates into the cutter bar until the bottom of the sleeve clamping groove (fig. 6a, fig. 6 b) in the knob, then the sleeve assembly is rotated by 90 degrees clockwise, the outer boss of the connector of the outer sleeve in the rotation can contact the compression limiting sleeve until the boss is reset through the limiting sleeve, the limiting effect (fig. 7 a) is achieved, and meanwhile, the sleeve connector clamping groove is rotated to the position of the positioning pin (fig. 7 b). At the moment, the installation is completed, the sleeve pipe assembly and the fixing assembly are connected into a whole, can rotate in the radial direction and can move in a certain displacement in the axial direction.

And secondly, disassembling, pressing down the limit sleeve, and pulling out the sleeve assembly by rotating the sleeve assembly by 90 degrees anticlockwise. At this point, the product is separated into two separate portions.

The parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. An ultrasonic knife capable of quickly replacing a sleeve comprises a knife bar (309), an inner sleeve (203), an outer sleeve (204), a knob inner sleeve (304), a positioning sleeve (305) and a locking sleeve (307), and is characterized in that one end of the locking sleeve (307) is connected with one end of the positioning sleeve (305) in a screwing mode, a long strip-shaped through hole (401) is formed in the positioning sleeve (305), the other end of the positioning sleeve (305) is inserted into the knob inner sleeve (304), a pin hole (402) is formed in the knob inner sleeve (304), one end of the knife bar (309) with the pin hole (402) is inserted into the positioning sleeve (305), a knife bar pin shaft (308) penetrates through the pin hole (402) of the knob inner sleeve (304), the long strip-shaped through hole (401) and the pin hole (402) at the end of the knife bar (309) to connect the three into a whole, and the locking sleeve (307) drives the positioning sleeve (305) to move axially, so that the knife bar pin shaft (308) Axial movement of (2); a positioning boss (306) is arranged on the inner wall of one end, inserted into the knob inner sleeve (304), of the positioning sleeve (305), an inner sleeve connector (205) is arranged at one end of the inner sleeve (203), an L-shaped slot (403) for the positioning boss (306) to insert is arranged on the inner sleeve connector, and the inner sleeve (203) and the positioning sleeve (305) are axially connected and synchronously move through the positioning boss (306) and the L-shaped slot (403); an axial key (404) is arranged on the surface of the inner sleeve connector (205), an outer sleeve connector (206) is arranged at one end of the outer sleeve (204), a key slot for the axial key to insert is formed in the outer sleeve connector (206), and the inner sleeve (203) and the outer sleeve (204) realize circumferential constraint and axial movement through the key slot structure; the outer sleeve is characterized in that at least two limiting bosses (405) are arranged outside the outer sleeve connector (206), a knob inner sleeve (304) is provided with a limiting slot (406) for inserting the limiting bosses (405), the circumference of the knob inner sleeve (304) is provided with a slot (407) for inserting the limiting slot (406) and then rotating, the slot (407) is further connected with an axial positioning opening, the axial positioning opening is used for enabling a positioning buckle (408) to contract and enter the knob inner sleeve (304) by overcoming spring force, the positioning buckle (408) is symmetrically arranged on the limiting sleeve (301), the limiting sleeve (301) is sleeved on the knob inner sleeve (304), one end of the limiting sleeve (301) is abutted against one end of a reset spring (302), the other end of the limiting sleeve is abutted against a limiting step (409) at the end part of the knob inner sleeve (304), and the other end of the reset spring (302) is abutted against the inner end surface of the knob (303) or an annular boss on the, the knob (303) is fixed on the knob inner sleeve (304); the limiting boss (405) is inserted into the limiting slot (406) to be in place and then rotates along the slot (407), the elastic force of the reset spring (303) is overcome in the rotating process, the positioning buckle (408) is pushed into each positioning opening to continue rotating until the limiting boss (405) passes over the positioning buckle (408), the positioning buckle (408) resets and blocks the slot (407) again so as to position the limiting boss (405) in the slot (407) and prevent the limiting boss from moving, the connection between the outer sleeve and the inner sleeve (304) of the knob is realized, and the inner sleeve (304) is completely positioned in the radial direction and the axial direction; when the tool is unlocked, the limiting sleeve (301) is pushed and pressed in the direction of the knob by force, the resistance of a return spring is overcome, the outer sleeve (204) is rotated in the opposite direction while the positioning buckle (408) enters the axial positioning opening until the limiting boss (405) is aligned with the limiting slot (406), the inner sleeve connector (205) is driven to rotate while the outer sleeve rotates, so that the inner sleeve connector (205) is separated from the positioning boss (306) on the positioning sleeve (305), the outer sleeve (204) and the inner sleeve (202) can be pulled out simultaneously, and the separation of the inner sleeve and the outer sleeve from the tool bar (309) is realized.

2. The ultrasonic scalpel capable of changing a cannula as in claim 1, wherein the locating boss (306) comprises two locating pins passing through the locating cannula (305).

3. The ultrasonic scalpel for quick-change cannulae of claim 1, wherein the two limit bosses (405) are of different sizes to ensure correct insertion and prevent misplugging, and the size of the limit slots (406) is adjusted accordingly.