An endoscopic rotary scalpel

Abstract

The endoscope rotary blade is characterized in that a driving assembly is axially reciprocated along an outer tube body by an adjusting assembly, the driving assembly is pushed or pulled back by an inner tube body, an output shaft abuts or is separated from each blade, the output shaft is connected or separated from a blade head, the blade head is pushed or pulled back to be separated from or connected to the outer tube body, the distance of the blade head pushed out of the outer tube body is adjusted by the inner tube body, each blade is unfolded when the output shaft abuts one end of each blade located in a plug-in groove, the unfolded blades expand the cutting range of the endoscope surgical device and improve the surgical efficiency, each blade is stored in a vertical state under the action of an elastic force when the output shaft does not abut one end of each blade located in the plug-in groove, each blade is stored without cutting and the space required for moving the blades is reduced, and the blade head has an independent displacement function through the inner tube body, thereby reducing the operation difficulty of surgical personnel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical surgical instruments, and particularly relates to an endoscope rotary knife. BACKGROUND

[0002] With the development of digestive endoscopy technology, the indications of endoscopic minimally invasive surgery are continuously expanding, and the application of ESD (endoscopic mucosal dissection), EMR (endoscopic mucosal resection), endoscopic full-thickness resection, etc. is also gradually popularized.

[0003] In the prior art, the cutter head of an endoscopic minimally invasive surgical knife usually adopts an electrotome, and the single cutting range is small and the cutting efficiency is low; and the common cutting cutter head does not have an independent distance adjusting function, and when the cutter head position needs to be adjusted, the endoscopic minimally invasive surgical knife needs to be displaced as a whole, thereby increasing the operation difficulty of medical staff. SUMMARY

[0004] In view of the deficiencies in the background art, the purpose of the present application is to provide an endoscope rotary knife.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] An endoscope rotary knife comprises:

[0007] an outer tube body;

[0008] a cutter head installed at the distal end of the outer tube body, and the distal end of the outer tube body is internally provided with a first buckle groove, the outer side of the cutter head is provided with at least one group of first elastic buckles arranged symmetrically and capable of being buckled in the first buckle groove, and the inner side of the cutter head is provided with an insertion groove, and the inner wall of the insertion groove is provided with a second buckle groove;

[0009] a driving assembly slidingly arranged in the outer tube body, an output shaft of the driving assembly being inserted into the insertion groove, and the output shaft being provided with at least one group of second elastic buckles arranged symmetrically and capable of being buckled in the second buckle groove;

[0010] a plurality of blades pivotally connected to the cutter head, and a reset spring being arranged between the cutter head and the blades, each of the blades being unfolded to a horizontal state when the output shaft abuts against one end of the blades located in the insertion groove, and each of the blades being stored to a vertical state under the action of the elastic force when the output shaft does not abut against one end of the blades located in the insertion groove;

[0011] The adjustment assembly includes an inner tube disposed within the outer tube. The distal end of the inner tube is connected to the drive assembly. By pushing or pulling the drive assembly through the inner tube, the output shaft abuts against or disengages from each of the blades, thereby connecting or disengaging the output shaft from the cutter head. Together, the output shaft pushes the cutter head away from the outer tube or pulls it back to engage with the outer tube. The distance by which the cutter head extends out of the outer tube is adjusted through the inner tube.

[0012] Furthermore, the first snap fastener has a first outer inclined surface and a second outer inclined surface on its front and rear sides along its sliding direction, and the second snap fastener has a first inner inclined surface and a second inner inclined surface on its front and rear sides along its sliding direction. The acute angle formed by the first inner inclined surface and the axis of the outer tube is smaller than the acute angle formed by the first outer inclined surface and the axis of the outer tube, and the acute angle formed by the second inner inclined surface and the axis of the outer tube is larger than the acute angle formed by the second outer inclined surface and the axis of the outer tube.

[0013] Furthermore, the first locking groove is an annular groove, so that the first spring buckle can be engaged in the first locking groove when the cutter head is rotated to any position, and the output shaft and the insertion groove have a matching rectangular shape.

[0014] Furthermore, the outer side of the cutter head is provided with a limiting part extending radially outward, the limiting part being used to abut against the opening of the outer tube body, so as to facilitate the output shaft disengaging from the insertion groove.

[0015] Furthermore, the drive assembly includes a base and a motor fixedly mounted on the base. The base is connected to the far end of the inner tube, and the side of the base is provided with a positioning groove. The inner wall of the outer tube is provided with positioning ribs that are adapted to the positioning groove.

[0016] Furthermore, a handle assembly is provided at the proximal end of the outer tube. The handle assembly is provided with a rotatable adjusting nut and a speed adjusting torque for controlling the output shaft speed of the drive assembly. The adjusting nut is threaded into the proximal end of the inner tube. By rotating the adjusting nut, the reciprocating sliding of the drive assembly and the cutter head is controlled.

[0017] Furthermore, the distal end of the outer tube is provided with a curved section, and the handle assembly is equipped with an angle adjuster for controlling the bending angle of the curved section, and the angle adjuster is provided with an angle adjustment button and an angle fixing button.

[0018] Furthermore, the distal end of the outer tube is provided with a negative pressure suction port and an injection port, and the handle assembly is equipped with a negative pressure suction interface that is connected to the negative pressure suction port and an injection interface that is connected to the injection port via a conduit.

[0019] Furthermore, the outer tube is provided with a light outlet, a CCD image sensor and an ultrasonic probe at its distal end. The light outlet is connected to a cold light source via an optical fiber, and the CCD image sensor is connected to a display.

[0020] Furthermore, the number of blades is 3-5, and each blade is evenly arranged in a circular array on the outside of the blade head, with the other end of each blade being rounded to prevent the blade head from causing accidental injury to the patient.

[0021] The beneficial effects of this invention are:

[0022] 1. This invention proposes an endoscopic rotary blade, in which the drive assembly and the adjustment assembly can reciprocate along the axial direction of the outer tube. The inner tube pushes or pulls back the drive assembly, causing the output shaft to abut or disengage from each blade, thereby connecting or disengaging the output shaft from the blade head. Together, they push the blade head away from the outer tube or pull it back to engage with it. The inner tube adjusts the distance the blade head extends beyond the outer tube. When the output shaft abuts against the end of the blade located in the insertion slot, each blade unfolds, expanding the cutting range of the endoscopic surgical device and improving cutting efficiency. When the output shaft is not abutting the end of the blade located in the insertion slot, each blade retracts into a vertical position under elastic force, allowing the blades to be retracted when cutting is not required, reducing the space required to move the blades. Furthermore, the inner tube enables the blade head to have independent displacement function, reducing the difficulty of operation for the surgeon.

[0023] 2. The endoscopic rotary blade proposed in this invention has the following characteristics: Since the acute angle formed by the first inner bevel and the axis of the outer tube is smaller than the acute angle formed by the first outer bevel and the axis of the outer tube, the force required for the second spring-loaded latch to engage with the second slot is less than the force required for the first spring-loaded latch to disengage from the first slot. This prevents the blade head from being pushed away from the outer tube before the output shaft and the blade head are fully connected. Similarly, since the acute angle formed by the second inner bevel and the axis of the outer tube is larger than the acute angle formed by the second outer bevel and the axis of the outer tube, the force required for the first spring-loaded latch to engage with the first slot is less than the force required for the second spring-loaded latch to disengage from the second slot. This prevents the output shaft from disengaging from the insertion slot before the blade head is connected to the outer tube.

[0024] 3. The endoscopic rotary blade proposed in this invention has a first locking groove that is an annular groove, so that the first spring lock can be engaged in the first locking groove when the blade head is rotated to any position. The output shaft and the insertion groove have a matching rectangular shape, which facilitates the transmission of rotational torque to the blade head.

[0025] 4. The endoscopic rotary blade proposed in this invention has a negative pressure suction, an injection port, a light outlet and a CCD image sensor at the distal end of the outer tube. The handle assembly is equipped with a negative pressure suction interface that is connected to the negative pressure suction port and an injection interface that are respectively connected to the injection port through a conduit, ensuring a clear field of vision at the cutting position, thereby improving surgical efficiency and reducing surgical time.

[0026] 5. The present invention proposes an endoscopic rotary blade, wherein the other end of each blade is rounded to prevent the blade head from causing accidental injury to the patient. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this example or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an endoscopic rotary blade according to the present invention;

[0029] Figure 2 for Figure 1 Enlarged view of section A;

[0030] Figure 3 This is an exploded view of an endoscopic rotary blade according to the present invention;

[0031] Figure 4 This is a schematic diagram of the blade of an endoscopic rotary blade of the present invention in a retracted state;

[0032] Figure 5 This is a schematic diagram of the blade of an endoscopic rotary scalpel of the present invention in the deployed state;

[0033] Figure 6 The return spring state of an endoscopic rotor blade according to the present invention corresponds to Figure 4 A schematic diagram;

[0034] Figure 7 The return spring state of an endoscopic rotor blade according to the present invention corresponds to Figure 5 A schematic diagram;

[0035] Figure 8 This is a schematic diagram of the installation of the reset spring for an endoscopic rotary blade according to the present invention;

[0036] Figure 9 This is a schematic diagram of the blade head of an endoscopic rotary blade according to the present invention;

[0037] Figure 10 This is a front view of the blade head of an endoscopic rotary blade according to the present invention;

[0038] Figure 11 This is a cross-sectional view of the blade tip of an endoscopic rotary blade according to the present invention;

[0039] Figure 12 This is a partial cross-sectional view of the outer tube of an endoscopic rotary blade according to the present invention;

[0040] Figure 13 This is a schematic diagram of the motor of an endoscope rotary blade according to the present invention;

[0041] Figure 14 This is a formal drawing of the motor for an endoscopic rotary blade according to the present invention;

[0042] In the diagram, 10 is the outer tube; 101 is the first retaining groove; 102 is the positioning rib; 20 is the blade; 201 is the first spring retainer; 2011 is the first outer bevel; 2012 is the second outer bevel; 202 is the limiting part; 203 is the insertion groove; 204 is the second retaining groove; 205 is the clearance groove; 206 is the first mounting shaft; 207 is the second mounting shaft; 30 is the blade; 401 is the motor; 402 is the output shaft; 403 is the second spring retainer; 4031 is the first inner bevel; 4032 is the second inner bevel; 404 is the base; 50 is the inner tube; 60 is the return spring; 70 is the handle assembly; 701 is the adjusting nut; 801 is the negative pressure suction; 802 is the injection port; 803 is the light outlet; and 804 is the ultrasonic probe. Detailed Implementation

[0043] The following is combined Figures 1-14 The present invention will be described in detail below.

[0044] An endoscopic rotary blade includes an outer tube body 10, a blade head 20, a plurality of blades 30 pivotally connected to the blade head 20, an output shaft 402 connected to a drive assembly of the blade head 20, and a drive assembly connected to the drive assembly to reciprocate the blade head 20. Specifically:

[0045] The cutter head 20 is installed at the far end of the outer tube 10, and the far end of the outer tube 10 is provided with a first fastening groove 101. The outer side of the cutter head 20 is provided with at least one set of first spring buckles 201 that are symmetrically arranged and can be fastened to the first fastening groove 101. The inner side of the cutter head 20 is provided with an insertion groove 203, and the inner wall of the insertion groove 203 is provided with a second fastening groove 204.

[0046] The drive assembly is slidably disposed inside the outer tube 10. The output shaft 402 of the drive assembly is inserted into the insertion slot 203. The output shaft 402 is provided with at least one set of second spring buckles 403 that are symmetrically arranged and can be fastened to the second buckle slot 204.

[0047] Several blades 30 are pivotally connected to a cutting head 20. A return spring 60, which is a torsion spring, is provided between the cutting head 20 and the blades 30. Its two output ends abut against the cutting head 20 and the blades 30, respectively. When the output shaft 402 abuts against the end of the blade 30 located in the insertion slot 203, each blade 30 is unfolded into a horizontal state; when the output shaft 402 is not abutting the end of the blade 30 located in the insertion slot 203, each blade 30 is retracted into a vertical state under the action of the spring force.

[0048] The adjustment assembly includes an inner tube 50 disposed within the outer tube 10. The distal end of the inner tube 50 is connected to the drive assembly. By pushing or pulling the drive assembly through the inner tube 50, the output shaft 402 abuts against or disengages from each blade 30, thereby connecting or disengaging the output shaft 402 from the cutter head 20. Together, the output shaft 402 pushes the cutter head 20 to disengage from the outer tube 10 or pulls the cutter head 20 back to engage with the outer tube 10. The distance by which the cutter head 20 extends out of the outer tube 10 is adjusted through the inner tube 50.

[0049] Therefore, the drive assembly can reciprocate along the outer tube 10 axially, and the inner tube 50 pushes or pulls back the drive assembly, causing the output shaft 402 to abut or disengage from each blade 30. This allows the output shaft 402 to connect to or disengage from the cutter head 20, and together push the cutter head 20 to disengage from the outer tube 10 or pull back the cutter head 20 to engage with the outer tube 10. The inner tube 50 adjusts the distance by which the cutter head 20 extends out of the outer tube 10, and when the output shaft 402 abuts against the blade 30, it is located in the insertion slot 2. When the blades 30 are in one end of the insertion slot 203, they unfold, expanding the cutting range of the endoscopic surgical device and improving cutting efficiency. When the output shaft 402 is not in contact with the end of the blade 30 located in the insertion slot 203, the ends of the blades 30 located outside the insertion slot 203 abut against each other under the action of elasticity, so that the blades 30 can be retracted when cutting is not required, reducing the space required to move the blades 30. Furthermore, the inner tube 50 enables the blade head 20 to have independent displacement function, reducing the difficulty of operation for the surgeon.

[0050] In this embodiment, the cutter head 20 is provided with a plurality of clearance grooves 201. One end of the clearance groove 201 is connected to the insertion groove 203. The clearance groove 205 is provided with a first mounting shaft 206 and a second mounting shaft 207. The blade 30 is pivotally connected to the first mounting shaft 206, and the return spring 60 is pivotally connected to the second mounting shaft 207.

[0051] In this embodiment, the first snap fastener 201 has a first outer inclined surface 2011 and a second outer inclined surface 2012 on its front and rear sides along its sliding direction, respectively. The second snap fastener 403 has a first inner inclined surface 4031 and a second inner inclined surface 4032 on its front and rear sides along its sliding direction, respectively. The acute angle formed by the first inner inclined surface 4031 and the axis of the outer tube 10 is smaller than the acute angle formed by the first outer inclined surface 2011 and the axis of the outer tube 10, that is, angle A1 is smaller than angle B1, so that the force required for the second snap fastener 403 to engage with the second slot is less than that required for the first snap fastener 201 to disengage from the first slot 10. The required force is such that the cutter head 20 is not pushed off the outer tube 10 before the output shaft 402 is fully connected to the cutter head 20. Similarly, the acute angle formed by the second inner inclined surface 4032 and the axis of the outer tube 10 is greater than the acute angle formed by the second outer inclined surface 2012 and the axis of the outer tube 10, i.e., angle A2 is greater than angle B2. This ensures that the force required for the first spring buckle 201 to engage with the first buckle groove 101 is less than the force required for the second spring buckle 403 to disengage from the second buckle groove 204, thus preventing the output shaft 402 from disengaging from the insertion groove 203 before the cutter head 20 is connected to the outer tube 10. The first buckle groove 101 has inclined surfaces that are adapted to the first outer inclined surface 2011 and the second outer inclined surface 2012, respectively, and the second buckle groove 204 has inclined surfaces that are adapted to the first inner inclined surface 4031 and the second inner inclined surface 4032, respectively.

[0052] In this embodiment, the first locking groove 101 is an annular groove, so that the first spring-loaded latch 201 can be engaged in the first locking groove 101 when the cutter head 20 is rotated to any position. The output shaft 402 and the insertion groove 203 have a matching rectangular shape. In this embodiment, a limiting part 202 extending radially outward is provided on the outer side of the cutter head 20. The limiting part 202 is used to abut against the opening of the outer tube 10, so that the output shaft 402 can disengage from the insertion groove 203.

[0053] In this embodiment, the drive assembly includes a base 404 and a motor 401 fixedly installed on the base 404. The base 404 is connected to the far end of the inner tube 50, and the side of the base 404 is provided with a positioning groove. The inner wall of the outer tube 10 is provided with a positioning rib 102 that is adapted to the positioning groove.

[0054] In this embodiment, a handle assembly 70 is provided at the proximal end of the outer tube 10. The handle assembly 70 is provided with a rotatable adjusting nut 701 and a speed adjusting torque for controlling the speed of the output shaft 402 of the drive assembly. The adjusting nut 701 is threaded into the proximal end of the inner tube 50. By rotating the adjusting nut 701, the reciprocating sliding of the drive assembly and the cutter head 20 is controlled.

[0055] In this embodiment, the distal end of the outer tube 10 is provided with a curved section, and the handle assembly 70 is equipped with an angle adjuster for controlling the bending angle of the curved section. The angle adjuster is provided with an angle adjustment knob and an angle fixing knob. The curved section is a common prior art, and its working principle is common knowledge, so it will not be described in detail here.

[0056] In this embodiment, the distal end of the outer tube 10 is provided with a negative pressure suction port 801 and an injection port 802. The handle assembly 70 is equipped with a negative pressure suction device interface 801 connected to the negative pressure suction port 801 and an injection interface 802 respectively via conduits. Furthermore, the distal end of the outer tube 10 is also provided with a light outlet 803, a CCD image sensor, and an ultrasonic probe 804. The light outlet 803 is connected to a cold light source via an optical fiber, the CCD image sensor is connected to a display, and the ultrasonic probe 804 further improves the intraoperative examination and resolution, ensuring a clear field of vision at the cutting position, thereby improving surgical efficiency and reducing surgical time.

[0057] In this embodiment, there are 3-5 blades 30, and each blade 30 is evenly arranged in a ring array on the outside of the blade head 20. The other end of each blade 30 is rounded to prevent the head of the blade 30 from causing accidental injury to the patient.

[0058] The working principle of the endoscopic rotary blade proposed in this invention is as follows:

[0059] The outer tube 10 is inserted into the affected area of ​​the patient's body. Rotating the adjusting nut 701, through the threaded engagement, moves the inner tube 50 forward, thereby pushing the motor 401 to engage the second spring clip 403 with the second clip groove 204. As the output shaft 402 extends into the insertion groove 203 of the blade head 20, it gradually abuts against the end of the blade 30 located within the insertion groove 203, causing the blade 30 to rotate and unfold into a horizontal position. Figure 5 and Figure 7 As shown, the connection between the motor 401 and the cutter head 20 is completed; continue to rotate the adjusting nut 701 so that the inner tube 50 pushes the cutter head 20 until the first spring buckle 201 disengages from the first buckle groove 101. At this time, the motor 401 is started, and the output shaft 402 can drive the cutter head 20 to rotate, and cut the lesion through the blade 30. During the cutting process, the adjusting nut 701 can be rotated forward and backward so that the distance between the cutter head 20 and the outer tube 10 can be adjusted.

[0060] After cutting, reverse the adjusting nut 701 to retract the blade 20, causing the first spring clip 201 to engage in the first clip groove 101, and the second spring clip 403 to disengage from the second clip groove 204. Under the elastic force of the return spring 60, the blade 30 automatically retracts into a vertical position. Figure 4 and Figure 6As shown, the output shaft 402 does not need to be completely withdrawn from the insertion slot 203; the second spring clip 403 only needs to be outside the insertion slot 203.

[0061] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An endoscopic rotary scalpel, characterized by, The utility model relates to a kind of surgical knife, including: Outer tube body; Tool bit, installed at the distal end of the outer tube body, and the distal end of the outer tube body is equipped with first buckle slot inside, the outside of the tool bit is equipped with at least a set of first elastic buckle that is symmetrically arranged and can be buckled in the first buckle slot, and the inside of the tool bit is equipped with insertion slot, the inner wall of the insertion slot is equipped with second buckle slot; Driving assembly, slidingly arranged in the outer tube body, the output shaft of the driving assembly is inserted into the insertion slot, and the output shaft is equipped with at least a set of second elastic buckle that is symmetrically arranged and can be buckled in the second buckle slot; Several blades, pivotally connected to the tool bit, and reset spring is arranged between the tool bit and the blade, when the output shaft abuts on one end of the blade in the insertion slot, each blade is unfolded and arranged in horizontal state;When the output shaft does not abut on one end of the blade in the insertion slot, each blade is arranged in vertical state under the action of elastic force; Adjusting assembly, including inner tube body arranged in the outer tube body, the distal end of the inner tube body is connected to the driving assembly, the driving assembly is pushed or pulled back by the inner tube body, so that the output shaft abuts or separates from each blade, so that the output shaft is connected or separated from the tool bit, and the tool bit is pushed to separate from the outer tube body or pulled back to buckle in the outer tube body, and the distance of the tool bit pushed out of the outer tube body is adjusted by the inner tube body.

2. An endoscopic rotary atraumatic knife according to claim 1, wherein, The first elastic buckle is respectively provided with first outer inclined surface and second outer inclined surface on the front and back of its sliding direction, the second elastic buckle is respectively provided with first inner inclined surface and second inner inclined surface on the front and back of its sliding direction, the acute angle formed by the first inner inclined surface and the axis of the outer tube body is smaller than the acute angle formed by the first outer inclined surface and the axis of the outer tube body, and the acute angle formed by the second inner inclined surface and the axis of the outer tube body is larger than the acute angle formed by the second outer inclined surface and the axis of the outer tube body.

3. An endoscopic rotary atraumatic surgical knife according to claim 2, wherein, The first buckle slot is annular slot, so that the first elastic buckle can be buckled in the first buckle slot when the tool bit is rotated to any position, and the output shaft and the insertion slot have a rectangular shape that is matched.

4. An endoscopic rotary atraumatic surgical knife according to claim 2, wherein, The outside of the tool bit is provided with a limiting portion extending radially outward, which is used for abutting on the orifice of the outer tube body, so that the output shaft is separated from the insertion slot.

5. An endoscopic roticulating knife according to claim 2, wherein The driving assembly includes a base and a motor fixedly installed on the base, the base is connected to the distal end of the inner tube body, and the side surface of the base is provided with a positioning groove, and the inner wall of the outer tube body is provided with a positioning rib matched with the positioning groove.

6. An endoscopic rotary atraumatic surgical knife according to claim 2, wherein, The proximal end of the outer tube body is provided with a handle assembly, the handle assembly is provided with a rotatable adjusting nut and a rotating speed adjusting knob for controlling the rotating speed of the output shaft of the driving assembly, the adjusting nut is threadedly connected to the proximal end of the inner tube body, and the reciprocating sliding of the driving assembly and the tool bit is controlled by rotating the adjusting nut.

7. An endoscopic roticulating knife according to claim 6, wherein The distal end of the outer tube body is provided with a bending portion, the handle assembly is provided with an angle adjusting knob for controlling the bending angle of the bending portion, and the angle adjusting knob is provided with an angle adjusting knob and an angle fixing knob.

8. An endoscopic rotary atraumatic surgical knife according to claim 6, wherein, The distal end of the outer tube body is provided with a negative pressure suction port and an injection port, and the handle assembly is provided with a negative pressure suction device interface and an injection interface connected to the negative pressure suction port and the injection port respectively through conduits.

9. An endoscopic roticulating knife according to claim 6, wherein The distal end of the outer tube body is also provided with a light outlet, a CCD image sensor and an ultrasonic probe, the light outlet is connected to a cold light source through an optical fiber, and the CCD image sensor is connected to a display.

10. An endoscopic rotary atraumatic surgical knife according to claim 2, wherein, The number of the blades is 3-5, each of the blades is arranged uniformly in a ring array outside the cutter head, and the other end of each of the blades is in a round head shape to prevent the head of the blade from causing accidental injury to the patient's organs.

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