Magnetic unlocking mechanism and surgical instrument

Abstract

The utility model provides a magnetic unlocking mechanism and a surgical instrument. The magnetic unlocking mechanism comprises a locking assembly and a knob assembly. The magnetic unlocking mechanism can be applied to surgical instruments, contact electrification of the electromagnet can be achieved when the knob body is pressed, then the electromagnet can attract the magnetic locking piece located at the locking position to the unlocking position, and therefore rapid and convenient unlocking can be achieved through simple downward pressing action; and the operation difficulty of surgical instruments is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a magnetic unlocking mechanism and a surgical instrument. Background Technology

[0002] Surgical staplers are commonly used surgical instruments in medicine as an alternative to manual suturing. Their main working principle involves using a scalpel to sever tissue and titanium staples to anastomose it. Depending on the body part being treated, staplers can be categorized into various types. For surgical staplers, the working principle involves inserting a cannula of a precisely positioned trocar into the patient's body at the surgical site. This creates a longitudinal incision in the tissue, and staples are applied to the opposite side of the incision, thereby severing and anastomosing the tissue.

[0003] The part of the stapler that enters the patient's body through a cannula is its distal working head. During the surgery, under endoscopic guidance, the positioning and precise locking of the distal working head are adjusted using a knob assembly. However, the distal working head of the stapler is initially locked, so it needs to be unlocked before proceeding with subsequent operations. Therefore, how to easily unlock the head is an important problem that needs to be solved during the development of the stapler. Utility Model Content

[0004] The present invention aims to provide a magnetic unlocking mechanism and surgical instrument to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A magnetic unlocking mechanism is applicable to surgical instruments to unlock the working head of the surgical instrument; the magnetic unlocking mechanism includes a locking assembly and a knob assembly.

[0007] The locking assembly includes: a magnetic locking element, a locking retaining element, and a rotating disk; the rotating disk has a wedge-shaped groove, the wedge-shaped groove having a locking position and an unlocking position; the magnetic locking element is initially located in the locking position and is subjected to a first force from the locking retaining element along the locking direction;

[0008] The knob assembly includes: a knob body, a reset component, an electromagnet, and a power supply; the knob body is disposed above the rotating disk, and the reset component is disposed between the knob body and the rotating disk; the power supply is electrically connected to a first contact, and the electromagnet is electrically connected to a second contact.

[0009] When the knob body is pressed to a preset position, the first contact point can contact the second contact point; the electromagnet applies a second force along the unlocking direction to the magnetic locking member, and the second force is greater than the first force.

[0010] As an improvement to the magnetic unlocking mechanism of this utility model, the locking retainer is a permanent magnet, which is disposed on one side of the locking position and applies the first force along the locking direction to the magnetic locking member.

[0011] As an improvement to the magnetic unlocking mechanism of this utility model, the permanent magnet is set in the rotating disk in an interlocking manner.

[0012] As an improvement to the magnetic unlocking mechanism of this utility model, the locking and holding member is a spring; the rotating disk is provided with a spring groove, the spring is assembled in the spring groove, and the spring abuts against the magnetic locking member to keep it in the locked position.

[0013] As an improvement to the magnetic unlocking mechanism of this utility model, the locking and holding member is a torsion spring; the rotating disk is provided with a torsion spring groove, the torsion spring is assembled in the torsion spring groove, and the torsion spring abuts against the magnetic locking member to keep it in the locked position.

[0014] As an improvement to the magnetic unlocking mechanism of this utility model, the power supply is housed in the knob body, and the first contact is disposed on the end face of the extension of the knob body; the end face of the extension can abut against the rotating disk when the knob body is pressed down; the second contact is disposed on the rotating disk and located in the area opposite to the end face of the extension.

[0015] As an improvement to the magnetic unlocking mechanism of this utility model, the electromagnet is disposed on one side of the unlocking position and can apply a second force along the unlocking direction to the magnetic locking member after being energized.

[0016] As an improvement to the magnetic unlocking mechanism of this utility model, the electromagnet is fitted into the rotating disk in an interlocking manner.

[0017] As an improvement to the magnetic unlocking mechanism of this utility model, the magnetic unlocking mechanism further includes a damping component;

[0018] The damping assembly includes a sliding element and an elastic element; the sliding element is disposed between the knob assembly and the housing of the surgical instrument, and abuts against the knob assembly or the housing under the action of the elastic element.

[0019] When the knob assembly rotates about its pivot, each sliding element can slide along the knob assembly or the housing and apply a damping force to the knob assembly in the opposite direction to its rotation.

[0020] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0021] A surgical instrument includes a magnetic unlocking mechanism as described above, which enables the working head of the surgical instrument to be unlocked quickly and conveniently.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The magnetic unlocking mechanism of this invention can be applied to surgical instruments. When the knob body is pressed, the electromagnet is energized, and the electromagnet can attract the magnetic locking element located in the locked position to the unlocked position. Thus, the unlocking can be achieved quickly and conveniently by a simple pressing action, which greatly reduces the difficulty of operating surgical instruments.

[0024] Furthermore, the magnetic unlocking mechanism of this invention also has a damping component, which provides a certain damping force for adjusting the knob assembly in surgical instruments. This not only provides the operator with a good tactile feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired position. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an exploded perspective view of Embodiment 1 of the magnetic unlocking mechanism of this utility model.

[0027] Figure 2 for Figure 1 Enlarged perspective view of the center locking assembly and the knob assembly;

[0028] Figure 3 for Figure 1 A cross-sectional view of the rotating disk, where the locking element is a permanent magnet;

[0029] Figure 4 for Figure 1 Top view of the rotating disc, where the locking retainer is a spring;

[0030] Figure 5 for Figure 1 Top view of the rotating disc, where the locking retainer is a torsion spring;

[0031] Figure 6 for Figure 1 Longitudinal cross-sectional view of the magnetic unlocking mechanism;

[0032] Figure 7 This is a circuit diagram of an embodiment using electric unlocking in Example 1;

[0033] Figure 8 This is a circuit diagram of another implementation method using electric unlocking in Example 1;

[0034] Figure 9 This is a cross-sectional view of Embodiment 2 of the magnetic unlocking mechanism of this utility model;

[0035] Figure 10 This is a three-dimensional schematic diagram of the third embodiment of the surgical instrument of this utility model. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1

[0038] This embodiment provides a magnetic unlocking mechanism that can be applied to surgical instruments to assist in the quick and convenient unlocking of the actuators in the surgical instruments.

[0039] In this embodiment, the surgical instrument can specifically be a stapler. The technical solution of the magnetic unlocking mechanism of this embodiment will be described in detail below, using the stapler as an example. Furthermore, the magnetic unlocking mechanism of this embodiment is also applicable to other surgical instruments that require unlocking.

[0040] When the magnetic unlocking mechanism of this embodiment is applied to a stapler, the electromagnet is energized when the knob body is pressed. This electromagnet can attract the magnetic locking element in the locked position to the unlocked position, thus achieving quick and convenient unlocking with a simple pressing action, greatly reducing the difficulty of operating surgical instruments. Therefore, the unlocking problem of staplers in the prior art is solved.

[0041] like Figure 1 , 2 As shown, the magnetic unlocking mechanism 100 of this embodiment includes a locking component 10 and a knob component 20.

[0042] The locking assembly 10 is used to lock the distal working head 201 of the stapler 200, so as to maintain it at a corresponding angle to facilitate the operator's medical activities. The working head 201, as referred to herein, is the mechanism at the distal position of the stapler 200 that performs the suturing function.

[0043] The locking assembly 10 includes a magnetic locking element 11, a locking retaining element 12, and a rotating disk 13. The rotating disk 13 is linked to the working head 201 of the stapler 200 via two pull rods 202, thus locking the working head 201 of the stapler 200 when the rotating disk 13 is locked. Specifically, the rotating disk 13 has a wedge-shaped groove 131 with one side communicating with the outside. The wedge-shaped groove 131 has a locking position 132 and an unlocking position 133. The locking position 132 refers to the narrower end of the wedge-shaped groove 131, while the unlocking position 133 refers to the wider end of the wedge-shaped groove 131.

[0044] The magnetic locking element 11 is initially located in the locking position 132, which can lock the rotating disk 13. The principle is that when the magnetic locking element 11 is stuck in the narrower end of the wedge groove 131, it will lock the rotating disk 13 against the inner wall of the anastomosis device 200 housing, thereby preventing the rotating disk 13 from rotating.

[0045] To facilitate the magnetic attraction and unlocking of the electromagnet, the magnetic locking component 11 is a part that can be subjected to force in a magnetic field. At the same time, in order to facilitate the movement of the magnetic locking component 11 from the locked position 132 to the unlocked position 133, the magnetic locking component 11 can be a magnetic ball.

[0046] The locking retainer 12 applies a first force to the locking member to keep it in the locked position 132, so that the working head 201 of the stapler 200 can always be locked before unlocking, so as to achieve timely locking after the angle adjustment of the working head 201.

[0047] In this embodiment, the locking retainer 12 can be a permanent magnet, a spring, or a torsion spring, to provide the magnetic locking member 11 with a magnetic attraction or elastic force to keep it in the locked position 132.

[0048] like Figure 3 As shown, when the locking retainer 12 is a permanent magnet, the permanent magnet is disposed on one side of the locking position 132 and can continuously apply a first force along the locking direction to the magnetic locking member 11. In one embodiment, the permanent magnet can be disposed in the rotating disk 13 in an embedded manner and maintain a suitable distance from the magnetic locking member 11 so that the magnetic locking member 11 can be subjected to the magnetic attraction force applied by the permanent magnet.

[0049] like Figure 4As shown, when the locking retainer 12 is a spring, one end of the spring elastically abuts against the locking member to press it into the locking position 132. Correspondingly, the rotating disk 13 is provided with a mounting groove 134 for receiving the spring. At this time, the mounting groove 134 is a cylindrical or arc-shaped spring groove suitable for spring assembly, and the spring groove is connected to the wedge-shaped groove 131 so that one end of the spring abuts against the magnetic locking member 11.

[0050] like Figure 5 As shown, when the locking retainer 12 is a torsion spring, a pressure plate can be connected to one end of the torsion spring, so that the pressure plate abuts against the magnetic locking member 11 to press it into the locking position 132. Correspondingly, the rotating disk 13 is provided with a mounting groove 134 for receiving the torsion spring. At this time, the mounting groove 134 is a circular groove suitable for the assembly of the torsion spring, and the circular groove is connected to the wedge groove 131 so that the pressure plate abuts against the magnetic locking member 11.

[0051] like Figure 2 As shown, the knob assembly 20 is used to achieve push-to-unlock the locking assembly 10. This knob assembly 20 is pivotally mounted on the housing of the stapler 200, specifically in an area suitable for manual operation.

[0052] The knob assembly 20 includes a knob body 21, a reset member 22, an electromagnet 23, and a power supply 24. The knob body 21 is positioned above the rotating disk 13 via a steering shaft 26. Specifically, one end of the steering shaft 26 extends through the upper cover 25 at its assembly location to be fixedly connected to the knob body 21. To achieve the connection between the steering shaft 26 and the knob body 21, the outer wall of the steering shaft 26 and the knob body 21 are in interference fit.

[0053] In one embodiment, the outer wall of the steering shaft 26 and the knob body 21 are fitted together by a protrusion and a groove. Specifically, one of the outer wall of the steering shaft 26 and the knob body 21 has a protrusion, while the other has a groove that mates with the protrusion. Thus, when the knob body 21 rotates, it drives the steering shaft 26 to rotate synchronously. Furthermore, to prevent the steering shaft 26 from separating from the knob body 21, the steering shaft 26 and the knob body 21 are also connected by a radial pin 27. Correspondingly, a strip-shaped pin hole 28 is provided between the steering shaft 26 and the knob body 21.

[0054] A disc 261 is provided at the other end of the steering shaft 26. The steering shaft 26 and the disc 261 are coaxially and perpendicularly connected, and the steering shaft 26 and the disc 261 can be an integral part. The disc 261 is further connected to the rotating disk 13 via a drive component 262 at its bottom. Thus, when the operator rotates the knob body 21, the knob body 21 can drive the rotating disk 13 to rotate via the steering shaft 26. The rotating disk 13 can further swing the working head 201 in the anastomosis device 200 via two pull rods 202 to adjust the working angle of the working head 201.

[0055] A reset element 22 is disposed between the knob body 21 and the rotating disk 13 to provide an elastic force to the knob body 21, so that the knob body 21 maintains a certain distance from the rotating disk 13 before being pressed. After being pressed, it can return to its initial position. In one embodiment, the reset element 22 is a compression spring, which is fitted on the steering shaft 26 and abuts against the knob body 21.

[0056] Reference Figure 6 As shown, to achieve magnetic unlocking when the knob body 21 is pressed down, the power supply 24 is electrically connected to the first contact 29, and the electromagnet 23 is electrically connected to the second contact 30. In one embodiment, the power supply 24 and the first contact 29 are integrated into the knob body 21. In this case, the power supply 24 is housed and installed in the knob body 21, and the first contact 29 is disposed on the end face of the extension of the knob body 21; the end face of the extension can abut against the rotating disk 13 when the knob body 21 is pressed down. Correspondingly, the second contact 30 is disposed on the rotating disk 13 and located in the area opposite to the end face of the extension.

[0057] Therefore, when the knob body 21 is pressed to the preset position, the first contact 29 can contact the second contact 30. At this time, the power supply 24 supplies power to the electromagnet 23 through the path formed by the first contact 29 and the second contact 30, so that the electromagnet 23 can apply a second force in the unlocking direction to the magnetic locking member 11. At the same time, since the magnetic locking member 11 is always held in the locked position 132 by the locking retaining member 12, the second force should be greater than the first force in order to overcome the first force and attract the magnetic locking member 11 to the unlocked position 133.

[0058] Thus, when the magnetic locking element 11 is attracted to the unlocking position 133 by the electromagnet 23, the rotating disk 13 is unlocked. As mentioned above, the locking position 132 refers to the narrower end of the wedge-shaped groove 131, while the unlocking position 133 refers to the wider end of the wedge-shaped groove 131.

[0059] Once the magnetic locking element 11 enters the wider end, it can no longer abut against the side wall of the wedge-shaped groove 131, thus failing to lock the rotating disk 13. At this point, as the steering shaft 26 continues to rotate, it can drive the rotating disk 13 to rotate via the drive element 262. The rotating disk 13 further drives the working head 201 to adjust to the required position via the pull rod 202, thus completing one unlocking and adjustment operation of the working head 201.

[0060] like Figure 7 As shown, this embodiment also provides another implementation method to achieve the conduction of the first contact 29 and the second contact 30. Specifically, in this embodiment, the power supply 24, the first contact 29, the second contact 30, and the electromagnet 23 form a circuit. At this time, in order to control the opening and closing of this circuit, a switch K can be set at the first contact 29 and the second contact 30, and an operation key S for controlling the opening / closing of the switch K can be set on the anastomosis device 200. The operation key S is specifically set in a position suitable for human hand operation, such as on the handle.

[0061] Therefore, by pressing key S, the first contact 29 and the second contact 30 can be closed directly and quickly, thus controlling the power supply to the circuit containing electromagnet 23, and thereby unlocking the rotating disk 13. Alternatively, such as Figure 8 As shown, the switch K can also be directly placed between the power supply 24 and the electromagnet 23. In this case, when the operation key S is in the open position, the power supply 24 can supply power to the electromagnet 23, so that the magnetic locking member 11 is attracted to the unlocking position 133, thereby unlocking the rotating disk 13.

[0062] The electric unlocking method, which controls the closure of switch K via operation key S, can replace the manual pressing action for unlocking. This electric unlocking method has the advantages of convenient operation and fast response.

[0063] In summary, the magnetic unlocking mechanism of this embodiment can be applied to a stapler. When the knob body is pressed, the electromagnet is energized, and the electromagnet can attract the magnetic locking element located in the locked position to the unlocked position. Thus, the unlocking can be achieved quickly and conveniently through a simple pressing action, which greatly reduces the operation difficulty of the stapler.

[0064] Example 2

[0065] This embodiment provides a magnetic unlocking mechanism that can be applied to surgical instruments to assist in the quick and convenient unlocking of the actuators in the surgical instruments.

[0066] Meanwhile, the magnetic unlocking mechanism in this embodiment also has an auxiliary adjustment function, which can provide a certain damping force for adjusting the knob in the stapler. In this way, not only is a good operating feel provided to the operator, but also the presence of damping force helps the knob assembly to stop accurately at the required position, greatly reducing the difficulty of operating the stapler.

[0067] like Figure 8 As shown, the relevant content from Embodiment 1 is incorporated into this embodiment in its entirety. The difference between Embodiment 2 and Embodiment 1 is that the magnetic unlocking mechanism 300 in this embodiment further includes a damping component 301.

[0068] Specifically, the damping assembly 301 includes a sliding resistance 302 and an elastic element 303. The sliding resistance 302 is disposed between the knob assembly and the anastomosis device housing 400, and abuts against the knob assembly or housing 400 under the action of the elastic element 303. That is, the sliding resistance 302 continuously applies pressure to the knob assembly or housing 400 under the action of the elastic element 303.

[0069] Under the direct or counteracting force of the pressure, when the knob assembly rotates around its pivot, the sliding element 302 can slide along the knob assembly or the housing 400 and apply a damping force opposite to the direction of rotation to the knob assembly, thereby providing the operator with a good operating feel and the knob assembly can be accurately stopped at the desired gear.

[0070] In order to provide feedback on the gear position signal according to the rotation angle during adjustment, the damping component 301 also includes a locking position 303 disposed on the knob component or the housing 400; when the sliding member 302 is aligned with the locking position 303, it can cooperate with the locking position 303.

[0071] Thus, when the knob assembly is rotated, the sliding resistance 302 sequentially engages with the corresponding locking position 303. When the knob assembly is rotated further, under the action of external force, the sliding resistance 302 can disengage from its locking position 303, thereby providing a certain tactile feedback for the adjustment of the knob, so as to provide feedback on the gear position confirmation signal.

[0072] In summary, the magnetic unlocking mechanism of this embodiment can be applied to an anastomosis device. By incorporating a damping component, it provides a certain damping force for adjusting the knob assembly in the anastomosis device. This not only provides the operator with a good tactile feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired position.

[0073] Example 3

[0074] like Figure 9As shown, this embodiment provides a surgical instrument 500, which can specifically be a stapler. The stapler includes magnetic unlocking mechanisms 100 and 300 as described in Embodiment 1 or 2.

[0075] When this magnetic unlocking mechanism is applied to a stapler, it can energize the electromagnet by pressing the knob body. The electromagnet can then attract the magnetic locking element in the locked position to the unlocked position, thus enabling quick and convenient unlocking through a simple pressing action, greatly reducing the difficulty of operating the stapler.

[0076] Furthermore, the magnetic unlocking mechanism of this invention also has a damping component, which provides a certain damping force for adjusting the knob assembly in the anastomosis device. This not only provides the operator with a good tactile feel, but also, due to the damping force, helps the knob assembly to accurately stop at the desired position.

[0077] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic unlocking mechanism applicable to surgical instruments to unlock the working head of the surgical instrument; characterized in that, The magnetic unlocking mechanism includes: a locking assembly (10) and a knob assembly (20); The locking assembly (10) includes: a magnetic locking member (11), a locking retainer (12), and a rotating disk (13); the rotating disk (13) has a wedge-shaped groove (131), the wedge-shaped groove (131) having a locking position (132) and an unlocking position (133); the magnetic locking member (11) is initially located in the locking position (132) and is subjected to a first force from the locking retainer (12) along the locking direction; The knob assembly (20) includes: a knob body (21), a reset member (22), an electromagnet (23), and a power supply (24); the knob body (21) is disposed above the rotating disk (13), and the reset member (22) is disposed between the knob body (21) and the rotating disk (13); the power supply (24) is electrically connected to the first contact (29), and the electromagnet (23) is electrically connected to the second contact (30); When the knob body (21) is pressed to a preset position, the first contact (29) can contact the second contact (30); the electromagnet (23) applies a second force along the unlocking direction to the magnetic locking member (11), and the second force is greater than the first force.

2. The magnetic unlocking mechanism according to claim 1, characterized in that, The locking retainer (12) is a permanent magnet, which is disposed on one side of the locking position (132) and applies the first force along the locking direction to the magnetic locking member (11).

3. The magnetic unlocking mechanism according to claim 2, characterized in that, The permanent magnet is fitted into the rotating disk (13) in an interlocking manner.

4. The magnetic unlocking mechanism according to claim 1, characterized in that, The locking retainer (12) is a spring; the rotating disk (13) is provided with a spring groove, the spring is assembled in the spring groove, and the spring abuts against the magnetic locking member (11) to keep it in the locked position (132).

5. The magnetic unlocking mechanism according to claim 1, characterized in that, The locking retainer (12) is a torsion spring; the rotating disk (13) is provided with a torsion spring groove, the torsion spring is assembled in the torsion spring groove, and the torsion spring abuts against the magnetic locking member (11) to keep it in the locked position (132).

6. The magnetic unlocking mechanism according to claim 1, characterized in that, The power supply (24) is housed in the knob body (21), and the first contact (29) is disposed on the end face of the extension of the knob body (21); the end face of the extension can abut against the rotating disk (13) when the knob body (21) is pressed down; the second contact (30) is disposed on the rotating disk (13) and is located in the area opposite to the end face of the extension.

7. The magnetic unlocking mechanism according to claim 1, characterized in that, The electromagnet (23) is located on one side of the unlocking position (133) and can apply a second force along the unlocking direction to the magnetic locking member (11) after being energized.

8. The magnetic unlocking mechanism according to claim 7, characterized in that, The electromagnet (23) is fitted into the rotating disk (13).

9. The magnetic unlocking mechanism according to claim 1, characterized in that, The magnetic unlocking mechanism also includes a damping component (301); The damping assembly (301) includes a sliding element (302) and an elastic element (303); the sliding element (302) is disposed between the knob assembly (20) and the housing of the surgical instrument, and abuts against the knob assembly (20) or the housing under the action of the elastic element (303); When the knob assembly (20) rotates about its pivot, each sliding element (302) can slide along the knob assembly (20) or the housing and apply a damping force to the knob assembly (20) in the opposite direction of its rotation.

10. A surgical instrument, characterized in that, The surgical instrument includes a magnetic unlocking mechanism as described in any one of claims 1-9.

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