Joint head active swing knob and surgical instrument

Abstract

The utility model discloses an active swing knob of joint head and surgical instrument, including main casing, install the knob subassembly on the main casing, main casing end portion is movably connected with the end effector, the knob subassembly structure includes: install the knob on the main casing, be equipped with the turntable below the knob, the turntable is driven by the knob to rotate synchronously, be equipped with the knob on the main casing end portion, be equipped with the end effector on the main casing end portion, and be equipped with the knob on the main casing end portion. A friction assembly is pressed between the knob and the turntable; a pull rod is installed in the main shell, the bottom end of the rotary disc is assembled with the pull rod, and the rotary disc rotates to drive the pull rod to move and promote the end effector to swing relative to the main shell. In actual use, when the rotary knob drives the rotary table to rotate to perform deflection adjustment of the end effector, the friction assembly which is pressed between the rotary knob and the rotary table forms stepless rotation with damping, so that the rotation has certain damping hand feeling and can be stopped when rotating to any position, damping self-locking is achieved, the locking effect is effectively enhanced, and the service life of the end effector is prolonged. And it is assisted that the end effector is reliably located at the preset angle, operation is convenient, and the user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an active swing knob for an articular head and a surgical instrument. Background Technology

[0002] As the most commonly used minimally invasive surgical instrument, the stapler requires constant adjustment of the end effector's positioning and precise, secure locking via endoscopy, depending on the characteristics of the surgery. It is not limited to insertion and transmission. Currently, the angle adjustment of the stapler's end effector is controlled by a joint motion mechanism, and the unlocking and locking of the joint motion control mechanism is controlled by a knob assembly.

[0003] In the prior art, although the knob assembly can control the unlocking and locking of the joint motion mechanism, its locking effect is not very good. Often, when contacting tissue, the tissue will exert a reaction force on the joint, causing the joint to swing, so that the end effector cannot contact the tissue at the optimal angle to perform tissue anastomosis and cutting.

[0004] Based on this, the present invention provides a knob for actively rotating the joint structure of the stapler, thereby further enhancing the locking effect on the basis of the existing knob locking angle. Utility Model Content

[0005] To address the aforementioned issues, this application provides a well-structured joint head active swing knob and surgical instrument, which effectively enhances the locking effect, helps ensure that the end effector is reliably positioned at a preset angle, and is easy to operate, thus improving the user experience.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An active swing knob for an articulated head includes a main housing, a knob assembly mounted on the main housing, and an end effector movably connected to the end of the main housing. The knob assembly has the following structure: it includes a knob mounted on the main housing, a turntable mounted below the knob, the knob drives the turntable to rotate synchronously, and a friction component is press-fitted between the knob and the turntable.

[0008] A pull rod is installed inside the main housing. The bottom of the turntable is fitted with the pull rod. The turntable rotates under the drive of the knob, causing the pull rod to move and causing the end effector to swing relative to the main housing.

[0009] As a further improvement to the above technical solution:

[0010] The main housing includes an upper support shell and a lower support shell that are mounted facing each other. The upper support shell is recessed to form a cavity, and the turntable is housed in the cavity.

[0011] The cavity opening is fitted with a top cover, which is located inside the knob. An elastic element is press-fitted between the top cover and the friction assembly.

[0012] The upper cover has an arc-shaped elongated hole, and the knob extends with an upper connector that passes through the arc-shaped elongated hole. The turntable extends with a lower connector, and the upper connector and the lower connector are fitted together so that the turntable rotates synchronously with the knob.

[0013] The top surface of the turntable extends upward to form a mating post, and the friction assembly is fitted onto the mating post.

[0014] The friction assembly has the following structure: it includes two or more fixed pads spaced apart, a movable pad installed between adjacent fixed pads, and a rubber pad installed between the fixed pads and the movable pads; the fixed pads are circumferentially fixed in the cavity, and the movable pads rotate synchronously with the turntable; the fixed pads, rubber pads, and movable pads are layered and tightly attached.

[0015] The inner wall of the cavity has multiple concave structures along the circumferential direction, and the circumferential edge of the fixed gasket extends to form multiple convex structures, which are fitted into the corresponding concave structures; the movable gasket has a mating hole in the middle, which is fitted with the mating post of the turntable and rotates synchronously; the cross-sectional shape of the mating post and the shape of the mating hole are consistent, including but not limited to elliptical, rectangular, polygonal, toothed, and splined structures.

[0016] The bottom surface of the turntable extends to form an extension that passes downward through the cavity, and a rod seat is fitted at the end of the pull rod, with the extension fitted onto the rod seat.

[0017] The bottom surface of the cavity has a through hole for the extension body to pass through and move relative to it, and the rod seat has an elongated hole for the extension body to be fitted and move relative to it; a fitting guide structure is provided between the lower support shell and the rod seat, and the turntable drives the rod seat to move relative to the lower support shell with the fitting guide structure as a guide through the extension body.

[0018] A surgical instrument comprising the joint head rotation knob described in any one of the above-mentioned methods.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In actual use, when the knob drives the turntable to rotate and adjust the deflection of the end effector, the friction component pressed between the knob and the turntable forms a damped stepless rotation. This makes the rotation have a certain damped feel, and it can be stopped at any position, which plays a role in damping self-locking. This effectively enhances the locking effect, helps to ensure that the end effector is reliably located at the preset angle, and is easy to operate, thus improving the user experience.

[0021] This utility model also has the following advantages:

[0022] By pressing an elastic element between the top cover and the friction assembly, the elastic force generated by the compression of the elastic element presses the adjacent pads in the friction assembly together, effectively ensuring the damping sensation brought by the friction assembly.

[0023] By setting up the upper connector of the knob and the upper connector of the turntable, the upper and lower connectors are fitted together to achieve the synchronous rotation of the turntable driven by the knob while the friction components are installed between the knob and the turntable.

[0024] When the knob drives the turntable to rotate, the fixed pad in the friction assembly remains fixed relative to the cavity and does not rotate, while the movable pad rotates with the turntable. Thus, the rotation of the movable pad relative to the rubber pad generates damping on both sides of the movable pad, effectively ensuring the damping sensation generated by the friction assembly. Furthermore, by setting multiple fixed pads and layering rubber pads and movable pads between adjacent fixed pads, a preset level of damping sensation can be set according to actual needs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external shape of the surgical instrument of this utility model.

[0026] Figure 2 This is a cross-sectional view of the knob assembly of this utility model.

[0027] Figure 3 This is an exploded view of the knob assembly of this utility model.

[0028] Figure 4 This is a schematic diagram of the installation of the fixing gasket in the upper support shell of this utility model.

[0029] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0030] Figure 6 This is a schematic diagram showing the assembly of the turntable and the movable gasket of this utility model.

[0031] Figure 7 This is a schematic diagram showing the installation of the knob, friction assembly, turntable, rod seat, and lower support shell of this utility model.

[0032] Figure 8 for Figure 7 A magnified view of a section at point B.

[0033] Figure 9 This is a schematic diagram showing the connection between the pull rod and the end effector of this utility model.

[0034] Figure 10 for Figure 9 A magnified view of a section at point C.

[0035] Figure 11This is a schematic diagram of the deflection state of the end effector of this utility model.

[0036] The components include: 1. Knob; 2. Top cover; 3. Elastic element; 4. Friction assembly; 5. Turntable; 6. Upper support shell; 7. Pull rod; 8. Lower support shell; 9. Rod seat;

[0037] 10. Knob assembly; 20. Main housing; 30. End effector; 301. Protrusion;

[0038] 11. Upper connector;

[0039] 21. One arc-shaped elongated hole;

[0040] 41. Fixed gasket; 42. Rubber gasket; 43. Movable gasket; 411. Outwardly protruding structure; 412. Two arc-shaped elongated holes; 431. Mating hole;

[0041] 51. Fitting column; 52. Lower connector; 53. Extension body;

[0042] 61. Cavity; 62. Concave structure;

[0043] 71. Two long holes;

[0044] 91. Long hole one; 92. Equipped with guide structure. Detailed Implementation

[0045] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, an active swing knob for a joint head in this embodiment includes a main housing 20, a knob assembly 10 mounted on the main housing 20, and an end effector 30 movably connected to the end of the main housing 20, such as... Figure 2 and Figure 3 As shown, the structure of the knob assembly 10 is as follows: it includes a knob 1 installed on the main housing 20, a turntable 5 mounted below the knob 1, the knob 1 drives the turntable 5 to rotate synchronously, and a friction assembly 4 is pressed between the knob 1 and the turntable 5; a pull rod 7 is installed inside the main housing 20, the bottom end of the turntable 5 is fitted with the pull rod 7, the turntable 5 rotates under the drive of the knob 1 to drive the pull rod 7 to move, causing the end effector 30 to swing relative to the main housing 20.

[0047] In actual use, when the knob 1 drives the turntable 5 to rotate to adjust the deflection of the end effector 30, the friction component 4 pressed between the knob 1 and the turntable 5 forms a damped stepless rotation, which makes the rotation operation of the knob 1 have a certain damped feel, and can be stopped at any position, thus achieving damping self-locking.

[0048] The main housing 20 includes an upper support housing 6 and a lower support housing 8 that are mounted facing each other. The upper support housing 6 is recessed to form a cavity 61, and the turntable 5 is housed in the cavity 61. Thus, the knob assembly 10 can be effectively installed and housed in the upper support housing 6. The overall structure is compact and reasonable, and it is also convenient to operate by the knob 1 located outside the upper support housing 6.

[0049] The cavity 61 is fitted with a top cover 2 at the opening. The top cover 2 is located inside the knob 1. An elastic element 3 is press-fitted between the top cover 2 and the friction assembly 4.

[0050] In this embodiment, the installation of the elastic element 3 is achieved by pressing the elastic element 3 between the upper cover 2 and the friction assembly 4, and the elastic element 3 can be kept in a compressed state. The elastic force generated by the compression of the elastic element 3 presses the adjacent pads in the friction assembly 4, effectively ensuring and maintaining the damping sensation brought by the friction assembly 4.

[0051] In this embodiment, the installation of the upper cover 2 at the opening of the cavity 61 can adopt existing conventional structures, such as fastening with fasteners or using snap-fit ​​structures, so as to achieve the fixed installation of the upper cover 2 at the opening of the cavity 61.

[0052] The upper cover 2 has an arc-shaped elongated hole 21. The knob 1 extends an upper connector 11 that passes through the arc-shaped elongated hole 21. The arc-shaped elongated hole 21 allows the upper connector 11 to pass downward and move relative to the knob. The turntable 5 has a lower connector 52 that extends from it. The upper connector 11 and the lower connector 52 are fitted together so that the turntable 5 rotates synchronously with the knob 1.

[0053] In this embodiment, by setting the upper connector 11 of the knob 1 and the lower connector 52 of the turntable 5, the upper connector 11 and the lower connector 52 are fitted together to realize that while the friction component 4 is installed between the knob 1 and the turntable 5, the knob 1 drives the turntable 5 to rotate synchronously.

[0054] In this embodiment, the upper connector 11 can be a downwardly extending cylindrical member with an axially opened insertion hole, and the lower connector 52 can be another cylindrical member inserted into the insertion hole, thereby realizing the synchronous rotation connection between the turntable 5 and the knob 1 in the circumferential direction.

[0055] In actual operation, the upper connector 11 and the lower connector 52 that are fitted together can also be set to other structures, such as the lower connector 52 being a socket structure and the upper connector 11 being a cylindrical part inserted into the socket structure, etc. The turntable 5 can be made to rotate synchronously with the knob 1 through the fitting between the upper connector 11 and the lower connector 52.

[0056] The top surface of the turntable 5 extends upward to form a mating post 51. The friction component 4 is fitted onto the mating post 51, so that the friction component 4 can be installed relatively stably between the turntable 5 and the upper cover 2.

[0057] The friction assembly 4 has the following structure: it includes two or more fixed pads 41 spaced apart, a movable pad 43 installed between adjacent fixed pads 41, and a rubber pad 42 installed between the fixed pads 41 and the movable pad 43; the fixed pads 41 are circumferentially fixed in the cavity 61, and the movable pads 43 rotate synchronously with the turntable 5; the fixed pads 41, the rubber pads 42, and the movable pads 43 are layered and tightly attached.

[0058] In this embodiment, when the knob 1 drives the turntable 5 to rotate, the fixed pad 41 in the friction assembly 4 is fixed relative to the cavity 61 and does not rotate, while the movable pad 43 rotates with the turntable 5. Thus, the rotation of the movable pad 43 relative to the rubber pad 42 generates damping on both sides of the movable pad 43, effectively ensuring the damping sensation generated by the friction assembly 4.

[0059] In practical use, multiple fixed pads 41 (more than two) can be used, combined with rubber pads 42 and movable pads 43 layered between adjacent fixed pads 41, so that the damping sensation can be preset according to actual needs.

[0060] In this embodiment, according to actual structural requirements, arc-shaped elongated holes 412 can be opened on each of the gaskets such as the fixed gasket 41, rubber gasket 42, and movable gasket 43 in the friction assembly 4 for the upper connector 11 and the lower connector 52 to be fitted, connected, and moved relative to each other.

[0061] like Figure 4 and Figure 5 As shown, the inner wall of the cavity 61 has multiple concave structures 62 along the circumferential direction, and the fixing gasket 41 extends along the circumferential edge to form multiple convex structures 411. The convex structures 411 are fitted into the corresponding concave structures 62 to achieve the installation of the fixing gasket 41 in the cavity 61 in a relatively fixed circumferential direction.

[0062] The movable pad 43 has a mating hole 431 in the middle. The mating hole 431 is fitted with the mating post 51 of the turntable 5 and rotates synchronously. The cross-sectional shape of the mating post 51 is consistent with the shape of the mating hole 431, including but not limited to elliptical, rectangular, polygonal, toothed, and splined structures.

[0063] exist Figure 6 In the embodiment shown, the mating hole 431 in the middle of the movable gasket 43 is a spline-shaped hole structure, and the mating post 51 is a spline structure. Through the installation between the mating post 51 and the mating hole 431, the movable gasket 43 can rotate synchronously with the turntable 5.

[0064] In another embodiment, a contoured hole, such as a round hole, can be provided on the movable pad 43 for the upper connector 11 and the lower connector 52 to be fitted and connected. When the knob 1 drives the turntable 5 to rotate via the upper connector 11 and the lower connector 52, the upper connector 11 and the lower connector 52 can also drive the movable pad 43 to rotate synchronously via the round hole.

[0065] like Figure 7 and Figure 8 As shown, the bottom surface of the turntable 5 extends to form an extension body 53 that passes downward through the cavity 61. The end of the pull rod 7 is equipped with a rod seat 9, and the extension body 53 is mounted on the rod seat 9, so that the rod seat 9 can be driven to move by the rotation of the turntable 5.

[0066] The bottom surface of the cavity 61 has a through hole for the extension body 53 to pass through and move relative to it, and the rod seat 9 has an elongated hole 91 for the extension body 53 to be fitted and move relative to it.

[0067] In one embodiment, the extension 53 can be a stepped columnar structure, with the bottom end of the extension 53 fitting downward into the elongated hole 91.

[0068] A mounting guide structure 92 is provided between the lower support shell 8 and the rod seat 9. The turntable 5 drives the rod seat 9 to move relative to the lower support shell 8 with the mounting guide structure 92 as the guide.

[0069] In this embodiment, the length direction of the elongated hole 91 forms an angle with the guiding direction of the mounting guide structure 92, for example, they are arranged perpendicular to each other. Thus, when the turntable 5 rotates, the relative movement of the extension body 53 within the elongated hole 91 is converted into a linear movement of the rod seat 9 relative to the lower support shell 8 with the mounting guide structure 92 as the guide.

[0070] exist Figure 8 In the embodiment shown, the fitting guide structure 92 can be a concave-convex guide structure that fits into each other along the length direction of the tie rod 7, such as a convex structure extending on the lower support shell 8 fitting into a concave structure opened on the rod seat 9, or a concave structure opened on the lower support shell 8 fitting into a convex structure extending on the rod seat 9.

[0071] In this embodiment, the cross-section of the concave-convex guide structure can be a rectangular, triangular, T-shaped structure or other existing structure that can serve as a fitting and guide.

[0072] In this embodiment, the mounting guide structure 92 can also be other existing mounting structures that can serve as moving guides after mounting.

[0073] The surgical instrument of this embodiment includes the joint head rotation knob as described above.

[0074] In this embodiment, the structural and power connection between the joint head rotation knob and the end effector 30, especially the structural and power connection between the pull rod 7 and the end effector 30, can adopt existing conventional structures, which can realize the rotation of the end effector 30 by moving the pull rod 7 in its own length direction.

[0075] In one embodiment, the structural and power connection between the joint head rotation knob and the end effector 30, especially the structural and power connection between the pull rod 7 and the end effector 30, can refer to existing published patents, such as the invention patent application No. 2024114841152 published on November 26, 2024, entitled "A transmission chain for surgical instruments and surgical instruments". In this invention patent application, the pull rod 7 is the transmission rack. The movement of the transmission rack in the length direction drives the transmission gear fitted with the transmission rack to rotate. The transmission gear drives the steering rod to swing through the meshing steering gear. That is, the swing of the end effector 30 is realized by the length movement of the pull rod 7.

[0076] In another embodiment, the structural and power connection between the joint head rotation knob and the end effector 30, especially the structural and power connection between the lever 7 and the end effector 30, can be as follows: Figure 9 and Figure 10 As shown, elongated holes 71 are respectively opened at the ends of the two pull rods 7. Protrusions 301, which are respectively fitted to the two elongated holes 71, are installed on the end effector 30. The main housing 20 located between the two elongated holes 71 and the end effector 30 are rotatably fitted. Thus, the movement of the two pull rods 7 in their respective length directions, combined with the relative movement of the protrusions 301 within the elongated holes 71, is converted into a swinging motion of the end effector 30 relative to the main housing 20. Figure 11 The image shows the state of the end effector 30 after it has swung.

[0077] The working principle of this utility model is as follows:

[0078] When the swing adjustment of the end effector 30 is required, the knob 1 is rotated and force is applied. The knob 1 drives the turntable 5 to rotate, and the turntable 5 drives the rod seat 9 to move relative to the lower support shell 8. Thus, the rod seat 9 drives the pull rod 7 to move along the length direction, thereby realizing the swing angle adjustment of the end effector 30.

[0079] When the turntable 5 rotates, the movable pad 43 in the friction assembly 4 rotates relative to the rubber pads 42 on both sides. Due to the compression force of the elastic element 3, the internal pads of the friction assembly 4 remain in a tight state, thereby generating frictional damping in the friction assembly 4, especially between the movable pad 43 and the rubber pads 42. This gives the rotational force applied to the knob 1 a certain damped feel, and also allows the knob 1 to be stopped at any position, achieving damping self-locking. Thus, the locking effect after the swing adjustment is effectively enhanced through damping.

[0080] This invention effectively enhances the locking effect after the articulated head rotates, helping to ensure that the end effector is reliably positioned at a preset angle, and is easy to operate, thus improving the user experience.

[0081] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0082] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A joint head active swing to turn knob, comprising a main shell (20), a knob assembly (10) is installed on the main shell (20), and a end effector (30) is movably connected to the end of the main shell (20), characterized in that: The structure of the knob assembly (10) is as follows: it includes a knob (1) installed on the main housing (20), a turntable (5) is installed below the knob (1), the knob (1) drives the turntable (5) to rotate synchronously, and a friction assembly (4) is pressed between the knob (1) and the turntable (5). The main housing (20) is equipped with a pull rod (7), and the bottom end of the turntable (5) is fitted with the pull rod (7). The turntable (5) rotates under the drive of the knob (1) to drive the pull rod (7) to move, causing the end effector (30) to swing relative to the main housing (20).

2. A pro-acti ve swing knob for a ball joint as defined in claim 1, characterized in that: The main housing (20) includes an upper support shell (6) and a lower support shell (8) mounted facing each other. The upper support shell (6) is recessed to form a cavity (61), and the turntable (5) is housed in the cavity (61).

3. A pro-actively swiveling knob of a joint head according to claim 2, characterized in that: The cavity (61) is fitted with a top cover (2) at the opening. The top cover (2) is located inside the knob (1). An elastic element (3) is press-fitted between the top cover (2) and the friction assembly (4).

4. A pro-acti ve swing knob for a ball joint as defined in claim 3, characterized in that: The upper cover (2) has an arc-shaped long hole (21), the knob (1) extends with an upper connector (11) that passes through the arc-shaped long hole (21), and the turntable (5) has a lower connector (52) extending from it. The upper connector (11) and the lower connector (52) are fitted together so that the turntable (5) rotates synchronously with the knob (1).

5. A pro-acti ve swing knob for a ball joint as defined in claim 2, wherein: The turntable (5) extends upward from the center of its top surface to form a mating post (51), and the friction assembly (4) is fitted onto the mating post (51).

6. A positive swivel knob for a ball joint as defined in claim 5, characterized in that: The friction assembly (4) has the following structure: it includes two or more fixed pads (41) spaced apart, a movable pad (43) is installed between adjacent fixed pads (41), and a rubber pad (42) is installed between the fixed pads (41) and the movable pads (43); the fixed pads (41) are circumferentially fixed in the cavity (61), and the movable pads (43) rotate synchronously with the turntable (5); the fixed pads (41), the rubber pads (42), and the movable pads (43) are layered and tightly attached.

7. A positive swivel knob for a ball joint as defined in claim 6, characterized in that: The inner wall of the cavity (61) has multiple concave structures (62) along the circumferential direction, and the fixed gasket (41) extends along the circumferential edge to form multiple convex structures (411). The convex structures (411) are fitted into the corresponding concave structures (62). The movable gasket (43) has a mating hole (431) in the middle. The mating hole (431) is fitted with the mating post (51) of the turntable (5) and rotates synchronously. The cross-sectional shape of the mating post (51) is consistent with the shape of the mating hole (431), including but not limited to elliptical, rectangular, polygonal, toothed, and splined structures.

8. A pro-acti ve swing-bulb knob as defined in claim 2 wherein: The bottom surface of the turntable (5) extends to form an extension (53) that passes downward through the cavity (61). The end of the pull rod (7) is fitted with a rod seat (9), and the extension (53) is fitted onto the rod seat (9).

9. A pivoting knob for active articulation of a ball joint as defined in claim 8, characterized in that: The bottom surface of the cavity (61) is provided with a through hole for the extension body (53) to pass through and move relative to it, and the rod seat (9) is provided with an elongated hole (91) for the extension body (53) to be fitted and move relative to it; a fitting guide structure (92) is provided between the lower support shell (8) and the rod seat (9), and the turntable (5) drives the rod seat (9) to move relative to the lower support shell (8) with the fitting guide structure (92) as the guide through the extension body (53).

10. A surgical instrument characterized by: Includes the joint head rotation knob as described in any one of claims 1 to 9.

Images