Push-type curette pliers

Abstract

The invention relates to the technical field of medical apparatus and instruments, and discloses push-type curette forceps, which comprise a sleeve main body, an elastic tube, a mounting seat, curette forceps and a push-type mechanism, one end of the elastic pipe is connected with the end part of the sleeve main body; the mounting seat is connected to the other end of the elastic pipe, a storage groove is formed in the mounting seat, and the storage groove communicates with the elastic pipe; the curette clamp is arranged in the storage groove; the pushing and closing mechanism comprises a push rod, a locking assembly, an elastic traction rope, a tension spring and a moving assembly; according to the curette forceps, the functions of a conventional curette knife and a pair of fetching forceps are integrated together, the curette forceps can be driven to be switched between a horizontal state and a vertical state through the pushing and closing mechanism, the switching between a focus scraping function and an embedding function is realized, and the front end part of the curette forceps has a bending function and is matched with a bendable endoscope for use, so that the curette forceps are more convenient to use. And besides the existing direct-view and straight-tube minimally invasive surgery modes, hyperosteogeny can be removed and taken out from the focus on the side in the direct-view range, so that the surgery range of the surgical instrument in the body of a patient is expanded.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a push-on type curette forceps. Background Art

[0002] In spinal surgery, when a patient has severe bone hyperplasia between the joints of his spine, minimally invasive surgery is required to remove the bone hyperplasia to avoid compressing the nervous system and causing the patient to be unable to walk or become paralyzed.

[0003] Before the operation, a surgical channel needs to be cleared between the corresponding position outside the lesion in the human spine and the soft tissue between the spine, but the spine must not be damaged. Then the surgical instruments must be passed through the surgical channel to reach the lesion location, so the operation needs to be performed in a limited space.

[0004] During the operation, an endoscope is first used to enter the patient's body to confirm the location, size, status and other information of the lesion points that appeared in the patient's pre-photographed film, and then a cleaning instrument is inserted into the patient's lesion point through a minimally invasive port to remove the nodule; during the cleaning instrument removal process, a curette knife needs to be inserted into the lesion first, and then the curette knife is used to scrape the bone hyperplasia to separate the bone hyperplasia and the joint, and then the bone hyperplasia is clamped and taken out of the body with forceps. Since the cleaning process requires the use of the above two cleaning instruments in succession, the operation process is relatively cumbersome, and the cleaning instrument needs to be re-positioned during replacement. At the same time, the ends of the above two cleaning instruments are hard structures. When used with an endoscope, surgery can only be performed within the direct viewing angle range. Lesions hidden on the side of the direct viewing angle range are difficult to remove, and there are certain limitations. Summary of the Invention

[0005] The purpose of the present invention is to provide a push-on curette forceps to solve the problem that the current cleaning instruments used in the spine, cervical vertebrae and joints do not have the combined functions of embedding and scraping, and the front end of the instrument does not have a bending function, making it difficult to fully clean the lesion.

[0006] The technical solution of the present invention is: A push-to-close type scraper pliers, comprising a sleeve body, an elastic tube, a mounting seat, a scraper pliers and a push-to-close mechanism; one end of the elastic tube is connected to the end of the sleeve body; the mounting seat is connected to the other end of the elastic tube, a receiving groove is provided on the mounting seat, and the receiving groove is communicated with the elastic tube; the scraper pliers is arranged in the receiving groove, and the side wall of the scraper pliers is hinged to the receiving groove through a hinge; the push-to-close mechanism comprises a push rod, a locking assembly, an elastic traction rope, a tension spring and a moving assembly; the push rod is slidably arranged inside the sleeve body, and one end of the push rod extends to the outside of the sleeve body; the locking assembly is connected between the sleeve body and the push rod, for pushing The moving position of the rod is locked; one end of the elastic traction rope is connected to the push rod, and the other end of the elastic traction rope passes through the elastic tube and extends to the receiving groove and is connected to the scraper pliers; the tension spring is arranged in the receiving groove and is located below the scraper pliers, one end of the tension spring is hinged to the scraper pliers, and the other end of the tension spring is hinged to the receiving groove, and the moving assembly is connected to the push rod for driving the push rod to move along the sleeve body. When the push rod pulls the scraper pliers to rotate around the hinge through the elastic traction rope, the scraper pliers is converted into a vertical state. When the push rod loosens the scraper pliers through the elastic traction rope, the scraper pliers is horizontally retracted into the receiving groove under the resetting action of the tension spring.

[0007] Preferably, as a further improvement of the present invention, the hinged member includes a first hinged axis, a second hinged axis and a third hinged axis, the first hinged axis is horizontally mounted in the receiving groove, the scraper pliers has a straight cutting section and a bending connecting section, and an inclined positioning guide slot is provided on the side wall of the bending connecting section, the first hinged axis slides through the positioning guide slot, the other end of the elastic traction rope is connected to the straight cutting section, the second hinged axis is fixed on the side wall of the straight cutting section, the third hinged axis is mounted and fixed on the side of the receiving groove away from the elastic tube, one end of the tension spring is hinged to the second hinged axis, and the other end of the tension spring is hinged to the third hinged axis.

[0008] Preferably, as a further improvement of the present invention, the moving assembly includes two holding rods, the middle parts of the two holding rods are hinged to each other, one of the holding rods is fixed to the bottom of the sleeve body, and the other holding rod is provided with a sliding structure along its longitudinal direction, the end of the push rod located outside the sleeve body is connected to the sliding structure, and the locking assembly is arranged between the two holding rods.

[0009] Preferably, as a further improvement of the present invention, the locking assembly includes a first connecting rod, an arcuate seat and a second connecting rod. The first connecting rod is fixed on the side wall of the holding rod connected to the sleeve body; the arcuate seat is fixed on the side wall of the first connecting rod and is concentrically arranged with the hinge center of the two holding rods, and the top surface of the arcuate seat is evenly distributed with a plurality of first ratchet teeth; the second connecting rod is fixed on the side wall of the holding rod connected to the push rod and is located directly above the arcuate seat, the bottom of the second connecting rod is provided with an arcuate surface matching the arcuate seat, and the arcuate surface is provided with a number of second ratchet teeth matching the first ratchet teeth, the second ratchet teeth are meshed with the first ratchet teeth, and the second connecting rod is an elastic rod body.

[0010] Preferably, as a further improvement of the present invention, the sliding structure includes a support, a fourth hinge shaft and two hinge seats; the support is fixed to the upper end of the holding rod, and a strip groove is provided on the support, and the strip groove is arranged along the longitudinal direction of the holding rod; the fourth hinge shaft slides through the strip groove; the two hinge seats are fixed to the end of the push rod, and the two hinge seats are hinged to the two ends of the fourth hinge shaft.

[0011] Preferably, as a further improvement of the present invention, a connecting ring is fixed to the lower end of each holding rod.

[0012] Preferably, as a further improvement of the present invention, the end surface of the mounting seat facing away from the elastic tube is a curved surface.

[0013] Preferably, as a further improvement of the present invention, the elastic tube is a coil spring tube, and both ends of the coil spring tube are fixed to the sleeve body and the mounting seat respectively.

[0014] Preferably, as a further improvement of the present invention, the straight cutting segment is provided with an arc-shaped serrated scraping edge.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The functions of the previous scraper and the removal forceps are integrated together. The scraper forceps can be rotated around the hinge through the push-close mechanism to realize the switching of the scraper forceps from vertical to horizontal. When the scraper forceps is in the horizontal position, it is retracted in the storage slot, so that the instrument is convenient and flexible to move. When scraping and cleaning is required, the push rod is controlled to move by the moving component and the elastic traction rope is pulled by the push rod, so that the scraper forceps is extended from the storage slot and is in a vertical state. At this time, the scraper forceps acts as the original scraper, and the scraper forceps is used to scrape the lesion by reciprocating the push-closed scraper forceps as a whole. When the lesion needs to be removed, the elastic traction rope is released, and the scraper forceps is controlled to rotate from vertical to horizontal under the elastic reset force of the tension spring. The scraper forceps acts as the original removal forceps through cooperation with the mounting seat during the rotation process, and the lesion is clamped and removed.

[0016] 2. The elastic tube is provided so that the front end of the minimally invasive curette forceps has a bending function. The minimally invasive instrument used in the large working channel of the flexible endoscope, in conjunction with the use of the flexible endoscope, can not only realize the existing minimally invasive procedures under direct vision and straight tubes, but also can manually control the left and right, front and back of the front end of the endoscope within the narrow range of the spine, and can clear the lesions that affect and compress the nerves to the greatest extent under clear image observation in a more panoramic view. For lesions on the side within the direct vision range, bone hyperplasia can also be cleared and removed, expanding the surgical range of surgical instruments in the patient's body, avoiding the expansion or reconstruction of the surgical channel due to inaccurate positioning of the surgical channel, fully and effectively improving the clinical refinement of surgery, and paving the way for the emergence of revolutionary procedures for minimally invasive spinal surgery and reduced recurrence rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the main structure of a push-on type curette forceps.

[0018] Figure 2 For the present invention Figure 1 A local enlarged schematic diagram of point A in the figure.

[0019] Figure 3 The present invention is a schematic structural diagram of a push-on curette forceps during rotation.

[0020] Figure 4 The present invention is a schematic structural diagram of a push-to-close curette forceps when the curette forceps is in a horizontal position.

[0021] Figure 5 For the present invention Figure 1 A partial enlarged schematic diagram of point B in FIG.

[0022] Figure 6 For the present invention Figure 1 A partial enlarged schematic diagram of point C in FIG.

[0023] Figure 7 The figure is a top view of a partial structure of a push-on curette forceps according to the present invention. DETAILED DESCRIPTION

[0024] The following combination Figures 1 to 7 , a detailed description of the specific embodiments of the present invention is provided. In the description of the invention, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of the invention, unless otherwise specified, "plurality" means two or more.

[0026] Example like Figures 1 to 7 As shown, the embodiment of the present invention provides a push-to-close type scraper pliers, comprising a sleeve body 1, an elastic tube 2, a mounting seat 3, a scraper pliers 4 and a push-to-close mechanism; one end of the elastic tube 2 is connected to the end of the sleeve body 1; the mounting seat 3 is connected to the other end of the elastic tube 2, and a receiving groove 31 is provided on the mounting seat 3, and the receiving groove 31 is communicated with the elastic tube 2; the scraper pliers 4 is arranged in the receiving groove 31, and the side wall of the scraper pliers 4 is hinged to the receiving groove 31 through a hinge; the push-to-close mechanism is used to rotate the scraper pliers 4 around the hinge to realize the switching of the scraper pliers 4 between vertical and horizontal positions, and the push-to-close mechanism includes a push rod 51, a locking assembly 52, and an elastic traction rope 53. , tension spring 55 and moving assembly; the push rod 51 is slidably arranged inside the sleeve body 1, and one end of the push rod 51 extends to the outside of the sleeve body 1; the locking assembly 52 is connected between the sleeve body 1 and the push rod 51, and is used to lock the moving position of the push rod 51; one end of the elastic traction rope 53 is connected to the push rod 51, and the other end of the elastic traction rope 53 passes through the elastic tube 2 and extends to the receiving groove 31 and is connected to the scraper pliers 4; the tension spring 55 is arranged in the receiving groove 31 and is located below the scraper pliers 4, one end of the tension spring 55 is hinged to the scraper pliers 4, and the other end of the tension spring 55 is hinged to the receiving groove 31; the moving assembly is connected to the push rod 51.

[0027] It should be noted that the push-on scraper forceps in the present invention are inserted into the instrument channel of the endoscope and used together with the endoscope. Since the mounting seat 3 is connected to the sleeve body 1 by the elastic tube 2, it can bend along with the rotation of the endoscope when the front end of the endoscope actively swings. At the same time, the push-on scraper forceps integrates the functions of the previous scraper knife and the object-removing forceps. The push-on mechanism is provided to enable the scraper forceps 4 to rotate around the hinge to realize the vertical and horizontal switching of the scraper forceps 4; usually, the scraper forceps 4 is pulled by the tension spring 55 to be in a horizontal state and retracted in the storage groove 31, so as to facilitate the flexible movement of the instrument. When scraping and cleaning is required, the push rod 51 is controlled to move by the moving component and the elastic traction rope 53 is pulled by the push rod 51 to pull the scraper forceps 4 from The scraper 4 extends out from the receiving groove 31 and is in a vertical state. The back side of the scraper pliers 4 is limited by abutting against the notch of the receiving groove 31, and the position of the push rod 51 is locked by the locking component 52, so that the scraper pliers 4 remains in a vertical state, so that the scraper pliers 4 acts as the original scraper knife, and the scraper pliers 4 is used to scrape the lesion by reciprocating the push-to-close scraper pliers. When the lesion needs to be removed and clamped out, the locking component 52 is released to lock the state of the push rod 51, and then the push rod 51 is controlled to move and the elastic traction rope 53 is loosened. At this time, the elastic traction rope 53 no longer generates tension on the scraper pliers 4. Under the tension of the tension spring 55, the scraper pliers 4 rotates around its hinge and acts as the original removal forceps by cooperating with the mounting seat 3 to clamp the lesion, thereby removing the scraped lesion.

[0028] Specifically, the hinge includes a first hinge axis 541, a second hinge axis 542 and a third hinge axis 543. The first hinge axis 541 is horizontally mounted in the storage groove 31. The scraper pliers 4 have a straight cutting section 41 and a bent connecting section 42, and an inclined positioning guide slot 421 is provided on the side wall of the bent connecting section 42. The first hinge axis 541 slides through the positioning guide slot 421. The other end of the elastic traction rope 53 is connected to the straight cutting section 41. The second hinge axis 542 is fixed on the side wall of the straight cutting section 41. The third hinge axis 543 is mounted and fixed on the side of the storage groove 31 away from the elastic tube 2. One end of the tension spring 55 is hinged to the second hinge axis 542, and the other end of the tension spring 55 is hinged to the third hinge axis 543.

[0029] In this embodiment, when the push-to-close mechanism is used to control the curette forceps 4 to rotate, Figure 4 As shown, when the push rod 51 moves to the left, since the elastic traction rope 53 is no longer exerted with tension, the first hinge shaft 541 is located at the lower end of the positioning guide slot 421 under the elastic force of the tension spring 55, so that the curette forceps 4 is in a horizontal folded state, which is convenient for movement; when it is moved to the lesion position, refer to Figure 3As shown, by moving the push rod 51 to the right, the push rod 51 applies tension to the scraper 4 through the elastic traction rope 53, so that the scraper 4 rotates around the first hinge axis 541 through the positioning guide notch 421. As the push rod 51 continues to move to the right, Figure 2 As shown, the first hinge shaft 541 is located at the upper end of the positioning guide slot 421, so that the curette forceps 4 is finally transformed into a vertical state to scrape the nodule.

[0030] In another embodiment of the present invention, the moving assembly includes two gripping rods 6, the middle parts of the two gripping rods 6 are hinged to each other, one of the gripping rods 6 is fixed to the bottom of the sleeve body 1, and the other gripping rod 6 is provided with a sliding structure along its longitudinal direction. The end of the push rod 51 outside the sleeve body 1 is connected to the sliding structure, and the locking assembly 52 is arranged between the two gripping rods 6. Through the above arrangement, the two gripping rods 6 can be held by hand, and a shearing operation can be used to control the push rod 51 to move horizontally left and right along the sleeve body 1, and the locking assembly 52 is set to fix the push rod 51 when the scraper forceps is raised to the maximum position to form the maximum scraper force.

[0031] Specifically, the locking assembly 52 includes a first connecting rod 521, an arc-shaped seat 522 and a second connecting rod 524. The first connecting rod 521 is fixed to the side wall of the holding rod 6 connected to the sleeve body 1; the arc-shaped seat 522 is fixed to the side wall of the first connecting rod 521 and is concentrically arranged with the hinge center of the two holding rods 6, and the top surface of the arc-shaped seat 522 is evenly distributed with a plurality of first ratchet teeth 523; the second connecting rod 524 is fixed to the side wall of the holding rod 6 connected to the push rod 51 and is located directly above the arc-shaped seat 522. The bottom of the second connecting rod 524 is provided with an arc-shaped surface matching the arc-shaped seat 522, and the arc-shaped surface is provided with a plurality of second ratchet teeth matching the first ratchet teeth 523 Tooth 525, the second ratchet tooth 525 is engaged with the first ratchet tooth 523, and the second connecting rod 524 is an elastic rod body. The second connecting rod 524 is provided to realize the engagement and separation process of the second ratchet tooth 525 and the first ratchet tooth 523. When the second ratchet tooth 525 is engaged with the first ratchet tooth 523, the holding rod 6 connected to the push rod 51 can only rotate in one direction, and after adjusting the scraper pliers 4 to a vertical state, the second ratchet tooth 525 is used to lock the first ratchet tooth 523. When it needs to be unlocked, the elastic rod body of the second connecting rod 524 is deformed so that the second ratchet tooth 525 is no longer engaged with the first ratchet tooth 523, thereby no longer locking the push rod 51.

[0032] Specifically, such as Figure 5As shown, the sliding structure includes a support 71, a fourth hinge shaft 72 and two hinge seats 73; the support 71 is fixed to the upper end of the holding rod 6, and a strip groove 711 is provided on the support 71, and the strip groove 711 is arranged along the longitudinal direction of the holding rod 6; the fourth hinge shaft 72 is slidably passed through the strip groove 711; the two hinge seats 73 are fixed to the end of the push rod 51, and the two hinge seats 73 are hinged to the two ends of the fourth hinge shaft 72.

[0033] Furthermore, in order to facilitate the manipulation of the rotation of the two gripping rods 6 , a connecting ring 61 is fixed to the lower end of each gripping rod 6 .

[0034] Furthermore, the end surface of the mounting seat 3 facing away from the elastic tube 2 is an arc surface, so as to avoid scratching tissues during movement.

[0035] Specifically, the elastic tube 2 is a coil spring tube, and both ends of the coil spring tube are fixed to the sleeve body 1 and the mounting seat 3 respectively.

[0036] Furthermore, the straight cutting section 41 is provided with an arc-shaped serrated scraping edge to facilitate cutting.

[0037] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A push-on curette forceps, characterized in that: include: Sleeve body (1); an elastic tube (2), one end of which is connected to the end of the sleeve body (1); A mounting seat (3) is connected to the other end of the elastic tube (2); a receiving groove (31) is provided on the mounting seat (3), and the receiving groove (31) is communicated with the elastic tube (2); A curette forceps (4) is arranged in the receiving groove (31), and a side wall of the curette forceps (4) is hinged to the receiving groove (31) via a hinge; The push-close mechanism comprises: a push rod (51) which is slidably arranged inside the sleeve body (1), and one end of the push rod (51) extends to the outside of the sleeve body (1); a locking assembly (52) which is connected between the sleeve body (1) and the push rod (51) and is used to lock the moving position of the push rod (51); an elastic traction rope (53) which is connected to the push rod (51) at one end and extends to the receiving groove (31) and is connected to the scraper pliers (4) after passing through the elastic tube (2); a tension spring (55) which is arranged in the receiving groove (31) and is located at the scraper pliers (4) ), one end of the tension spring (55) is hinged to the scraper pliers (4), and the other end is hinged to the receiving groove (31); a moving assembly is connected to the push rod (51), and is used to drive the push rod (51) to move along the sleeve body (1), when the push rod (51) pulls the scraper pliers (4) to rotate around the hinge through the elastic traction rope (53), the scraper pliers (4) is converted into a vertical state, and when the push rod (51) releases the scraper pliers (4) through the elastic traction rope (53), the scraper pliers (4) is horizontally retracted into the receiving groove (31) under the resetting action of the tension spring (55).

2. The push-on curette forceps according to claim 1, characterized in that: The hinged member comprises a first hinge shaft (541), a second hinge shaft (542) and a third hinge shaft (543), wherein the first hinge shaft (541) is horizontally mounted in the receiving groove (31), the scraper forceps (4) comprises a straight cutting section (41) and a bending connecting section (42), and a slanted positioning guide slot (421) is provided on the side wall of the bending connecting section (42), and the first hinge shaft (541) is slidably inserted into the positioning guide slot. In the opening (421), the other end of the elastic traction rope (53) is connected to the straight cutting section (41), the second hinge shaft (542) is fixed on the side wall of the straight cutting section (41), and the third hinge shaft (543) is mounted and fixed on the side of the receiving groove (31) away from the elastic tube (2). One end of the tension spring (55) is hinged to the second hinge shaft (542), and the other end of the tension spring (55) is hinged to the third hinge shaft (543).

3. The push-on curette forceps according to claim 2, characterized in that: The moving assembly comprises two holding rods (6), the middle parts of the two holding rods (6) are hinged to each other, one of the holding rods (6) is fixed to the bottom of the sleeve body (1), and the other holding rod (6) is provided with a sliding structure along its longitudinal direction, the end of the push rod (51) located outside the sleeve body (1) is connected to the sliding structure, and the locking assembly (52) is arranged between the two holding rods (6).

4. The push-on curette forceps according to claim 3, characterized in that: The locking assembly (52) comprises: A first connecting rod (521) is fixed to a side wall of a gripping rod (6) connected to the sleeve body (1); An arc-shaped seat (522) is fixed on the side wall of the first connecting rod (521) and is arranged concentrically with the hinge center of the two holding rods (6); a top surface of the arc-shaped seat (522) is uniformly provided with a plurality of first ratchet teeth (523); The second connecting rod (524) is fixed on the side wall of the holding rod (6) connected to the push rod (51) and is located directly above the arc seat (522). The bottom of the second connecting rod (524) is provided with an arc surface matching the arc seat (522), and the arc surface is provided with a plurality of second ratchet teeth (525) matching the first ratchet teeth (523). The second ratchet teeth (525) are engaged with the first ratchet teeth (523). The second connecting rod (524) is an elastic rod body.

5. The push-on curette forceps according to claim 3, characterized in that: The sliding structure comprises: A support (71) is fixed to the upper end of the gripping rod (6), and a strip-shaped notch (711) is provided on the support (71), and the strip-shaped notch (711) is arranged along the longitudinal direction of the gripping rod (6); A fourth hinge shaft (72) is slidably disposed in the strip-shaped slot (711); Two hinged seats (73) are fixed to the ends of the push rod (51), and the two hinged seats (73) are hinged to the two ends of the fourth hinge shaft (72).

6. The push-on curette forceps according to claim 3, characterized in that: A connecting ring (61) is fixed to the lower end of each holding rod (6).

7. The push-on curette forceps according to claim 1, characterized in that: The end surface of the mounting seat (3) facing away from the elastic tube (2) is a curved surface.

8. The push-on curette forceps according to claim 1, characterized in that: The elastic tube (2) is a coil spring tube, and both ends of the coil spring tube are fixed to the sleeve body (1) and the mounting seat (3) respectively.

9. The push-on curette forceps according to claim 2, characterized in that: The straight cutting section (41) is provided with an arc-shaped sawtooth scraping edge (411).

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