Locking mechanism for preventing jaw wobble, powered anastomotic device, and medical device

Abstract

The disclosure provides a locking mechanism for preventing jaw shaking, an electric anastomat and medical equipment. The locking mechanism for preventing jaw shaking comprises a locking seat arranged in a stepped surface of a firing part (3) of a main body, one side of the locking seat being provided with an inclined surface; a locking connecting assembly (4) sleeved on the firing part (3), one side of the locking connecting assembly being closely attached to the inclined surface of the locking seat, and the other side being closely attached to a deflection part (2) of the main body; a fastening assembly arranged on the deflection part (2) for stably locking the deflection part (2); wherein after the firing part (3) is fired, the locking seat pushes the locking connecting assembly (4) to press the deflection part (2), the fastening assembly on the deflection part (2) stably locks the deflection part (2) to prevent the jaw (1) from shaking; after the firing part (3) is withdrawn, the locking connecting assembly (4) does not generate pressure on the deflection part (2), the deflection part (2) is freely movable, and the jaw (1) is freely deflected.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, specifically to a locking mechanism for preventing jaw vibration, an electric stapler, and medical equipment. Background Technology

[0002] Electric laparoscopic staplers are mainly used in minimally invasive surgical procedures, offering advantages such as smaller incisions, simultaneous tissue cutting and suturing, and less bleeding. To accommodate tissue resection and suturing at different angles, the stapler needs to rotate a certain angle left and right along a plane within a limited space, controlled by a handle, enabling resection and suturing at different locations with a small incision.

[0003] Currently, the left and right deflection of the stapler jaws is mainly achieved through operation at the handle end. Staplers are generally used in minimally invasive surgeries with incisions approximately 15mm in diameter; the smaller the diameter, the better. This reduction in incision size limits the product's structural dimensions. To achieve left and right deflection of the jaws, a mechanical mechanism needs to be added to the rear end of the system, enabling long-distance transmission. The trigger end is located at the handle, typically using angular momentum rotation output, which is transmitted linearly to the front jaws to achieve left and right angle deflection. Start and stop are controlled by signals, and during operation, there are zero position, left deflection limit, and right deflection limit.

[0004] The deflection of the jaws involves long-distance transformation, complex structure, and multiple intermediate steps. Furthermore, the firing and retraction of the jaws during surgery greatly complicates the force exerted on them. Especially during surgery, when the jaws are deflected to a certain angle, the force is transmitted to the deflection mechanism through leverage. Under this force, the deflection mechanism becomes unstable, causing the jaws to initially swing towards zero and then in the direction of deflection during firing and retraction. Even slight wobbling can tug at tissues, causing tissue damage, bleeding, or even separation, resulting in unnecessary harm to the patient. Summary of the Invention

[0005] In view of the above, the first aspect of this disclosure provides a locking mechanism to prevent jaw jitter, characterized in that it includes: a locking seat disposed in the stepped surface of the firing part of the main body, with an inclined surface on one side of the locking seat; a locking connecting assembly sleeved on the firing part, with one side of the locking connecting assembly tightly abutting the inclined surface of the locking seat and the other side tightly abutting the deflection part of the main body; and a fastening assembly disposed on the deflection part to securely lock the deflection part; wherein, when the firing part is fired, the locking seat pushes the locking connecting assembly to squeeze the deflection part, and the fastening assembly on the deflection part securely locks the deflection part to prevent jaw jitter; when the firing part is retracted, the locking connecting assembly does not exert pressure on the deflection part, the deflection part moves freely, and the jaws deflect freely.

[0006] According to an embodiment of the present disclosure, the locking seat includes: a locking wedge block, which is at least partially engaged in the stepped surface of the firing portion; and a spring member connected to the locking wedge block for pushing the locking wedge block to slide.

[0007] According to an embodiment of this disclosure, a spring is disposed in a mounting groove, and a spring guide is provided in the mounting groove, the spring guide causing the spring to extend and retract along the firing direction of the firing part.

[0008] According to an embodiment of this disclosure, the locking connection assembly is a rectangular sleeve structure, which is sleeved on the firing part.

[0009] According to an embodiment of this disclosure, the fastening assembly includes: a deflection friction plate disposed on the deflection portion; and a friction plate engaged in the inner core tube. When the locking connection assembly presses the deflection portion, the deflection friction plate and the friction plate are subjected to positive pressure, which increases their frictional force. The friction plate is fixed on the inner core tube, and the deflection friction plate remains stationary due to the frictional force.

[0010] According to embodiments of this disclosure, the deflection friction pad comprises multiple pieces.

[0011] According to an embodiment of this disclosure, the friction plate has a cross-shaped structure, with its upper and lower ends locked in the inner core tube.

[0012] According to embodiments of this disclosure, the locking seat, locking connection assembly, and fastening assembly are all disposed inside the inner core tube.

[0013] A second aspect of this disclosure provides an electric stapler, the electric stapler comprising: a stapler body; a locking mechanism for preventing jaw jitter as described above; wherein the stapler body and the locking mechanism for preventing jaw jitter are detachably connected.

[0014] A third aspect of this disclosure provides a medical device including a locking mechanism as described above to prevent jaw jitter.

[0015] The locking mechanism for preventing jaw jitter disclosed herein, through the cooperative use of a locking seat, a locking connecting component, and a fastening component, can lock after the jaws deflect, ensuring that the jaws do not wobble left and right due to force when firing and retracting, thereby improving the stability of the jaws during operation. Attached Figure Description

[0016] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 This schematic diagram illustrates the structure of a locking mechanism for preventing jaw jitter according to an embodiment of the present disclosure;

[0018] Figure 2 This illustration schematically depicts an embodiment according to the present disclosure. Figure 1 Enlarged view of the middle section structure;

[0019] Figure 3 An exploded view schematically illustrates a locking mechanism for preventing jaw jitter according to an embodiment of the present disclosure;

[0020] Figure 4 This schematic diagram illustrates the structure of the friction plate and the inner core tube fixed according to an embodiment of the present disclosure;

[0021] Figure 5 A top view schematically illustrates a portion of the structure of a locking mechanism for preventing jaw jitter according to an embodiment of the present disclosure;

[0022] Figure 6 A schematic cross-sectional view of the friction plate and inner core tube according to an embodiment of the present disclosure is shown;

[0023] Figure 7 A schematic side view of a spring and a spring guide according to an embodiment of the present disclosure is shown;

[0024] Explanation of icon numbers:

[0025] 1. Jaws; 2. Deflection section; 3. Firing section; 4. Locking connection assembly; 5. Locking wedge; 6. Spring component; 7. Deflection center; 8. Friction plate; 9. Spring guide component; 10. Deflection friction plate; 11. Inner core tube. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0028] To achieve stability in the jaw deflection angle of the stapler, this disclosure presents a locking mechanism to prevent jaw vibration. This locking mechanism locks in place after the jaws deflect, ensuring that lateral swaying due to force is avoided during jaw firing and retraction. This allows for more accurate and rapid safe and effective cutting and suturing of tissues at different angles, without requiring additional operator skills.

[0029] This disclosure provides a locking mechanism to prevent jaw jitter; please refer to [link to relevant documentation]. Figures 1-3The device includes: a locking seat, located in the stepped surface of the main firing part 3, with an inclined surface on one side; a locking connecting component 4, sleeved on the firing part 3, with one side of the locking connecting component tightly against the inclined surface of the locking seat and the other side tightly against the deflection part 2 of the main body; and a fastening component, located on the deflection part 2, for securely locking the deflection part 2. When the firing part 3 fires, the locking seat pushes the locking connecting component 4 to squeeze the deflection part 2, and the fastening component on the deflection part 2 securely locks the deflection part 2 to prevent the jaws 1 from shaking. When the firing part 3 retracts, the locking connecting component 4 does not exert pressure on the deflection part 2, the deflection part 2 moves freely, and the jaws 1 deflect freely.

[0030] It should be noted that the deflection of jaw 1 is achieved by the forward and backward movement of the deflection part 2, which causes jaw 1 to deflect left and right around the deflection center 7. When jaw 1 deflects to the target angle, the firing part 3 moves forward, releasing the locking seat. The locking seat pushes the locking connecting assembly 4, which presses against the deflection part 2. The deflection part 2 remains relatively stationary with the inner core tube 11 through friction (multi-faceted), stabilizing the jaws and preventing vibration. When the firing part 3 retracts to a certain position, it presses against the locking seat, removing positive pressure from the locking connecting assembly 4. At this point, the deflection part 2 can move freely, enabling the jaw 1 to deflect left and right, thus improving the stability of jaw 1 during operation.

[0031] The locking mechanism for preventing jaw vibration disclosed herein is applicable to electric laparoscopic staplers. It is a mechanism to prevent jaw vibration during use, which improves the practicality and convenience of electric laparoscopic staplers, ensures smooth operation, and improves economic efficiency.

[0032] Based on the above embodiments, the locking seat includes: a locking wedge 5, which is at least partially engaged in the stepped surface of the firing part 3; and a spring 6, connected to the locking wedge 5, for pushing the locking wedge 5 to slide.

[0033] Specifically, the locking seat includes a locking wedge 5 and a spring 6. The deflecting part 2 moves linearly back and forth, pushing the deflecting shaft to move around the deflection center 7, causing the jaws 1 to move left and right around the deflection center 7, thus achieving the left and right angle deflection of the jaws 1. When the jaws 1 are subjected to force, the reaction force acts on the deflecting part 2.

[0034] After deflection, as the firing part 3 moves forward, the stepped surface of the firing part 3 disengages from the locking wedge 5. The locking wedge 5, under the elastic force of the spring 6, moves forward, causing the inclined surface of the locking wedge 5 to push the locking connecting assembly 4 towards the deflection part 2, compressing the deflection part 2. The fastening assembly on the deflection part 2 securely locks it. Therefore, when the deflection part 2 is subjected to the reaction force of the jaws 1, it cancels out the static friction force exerted on the deflection part 2 by the fastening assembly, ensuring the stability of the jaws 1.

[0035] When the firing part 3 retracts, the stepped surface of the firing part 3 touches the locking wedge block 5, so that the locking connecting assembly 4 is not squeezed by the inclined surface. That is, the locking connecting assembly 4 and the fastening assembly will not generate positive pressure, and the deflection part 2 can move freely, realizing the free deflection of the jaw 1.

[0036] Based on the above embodiment, the spring member 6 is provided in the mounting groove, and the mounting groove is provided with a spring guide member 9, which causes the spring member 6 to extend and retract along the firing direction of the firing part 3.

[0037] like Figure 7 As shown, the spring guide 9 is a guide post, the axis of which is parallel to the firing direction of the firing part 3. The spring 6 is fitted onto the guide post, and the rear end of the spring 6 acts on the inner core tube 11. After firing, the spring potential energy is used to push the locking wedge 5 forward. The inclined surface will squeeze the locking connection assembly 4 of the sleeve structure towards the friction plate 10, providing a positive pressure to achieve the locking effect. During the compression or extension process, the spring 6 always maintains its extension and contraction along the firing direction of the firing part 3 to push the locking wedge 5 to move along the firing direction, so that the inclined surface of the locking wedge 5 squeezes the locking connection assembly 4. This restriction of the movement path makes the overall operation of the mechanism smoother and more stable, and less prone to operational deviations.

[0038] Based on the above embodiments, the locking connection component 4 is a rectangular sleeve structure, which is sleeved on the firing part 3.

[0039] The locking connection component 4 is a rectangular sleeve structure, which does not affect the normal firing and retraction operation of the firing part 3, while also transmitting the pressure of the locking wedge 5 to the deflection part 2 to prevent the jaws 1 from deflecting. The overall structure of the locking mechanism is simple and easy to operate.

[0040] Based on the above embodiments, the fastening assembly includes: a deflection friction plate 10 disposed on the deflection part 2; and a friction plate 8 engaged in the inner core tube 11, with its upper and lower ends engaged on the inner core tube 11, making it an integral part of the inner core tube 11. When the locking connection assembly 4 presses the deflection part 2, the deflection friction plate 10 and the friction plate 8 are subjected to positive pressure, which increases their frictional force. The friction plate 8 is fixed on the inner core tube 11, and the deflection friction plate 10 remains stationary under the action of frictional force.

[0041] The deflection friction plate 10 on the deflection part 2 is pressed tightly against the friction plate 8 under the action of normal pressure. The friction plate 8 is inserted into the inner core tube 11 and is relatively stationary. Therefore, when the deflection part 2 is subjected to the reaction force of the jaws 1, it cancels out the static friction force on the deflection part 2, ensuring the stability of the jaws 1.

[0042] Based on the above embodiments, the deflection friction plate 10 includes multiple plates.

[0043] To further increase friction, multiple deflection friction plates 10 can be provided. The specific number, material, and friction area of ​​the deflection friction plates can be set according to actual conditions. Of course, the friction plate 8 can also be multiple pieces to increase friction.

[0044] Based on the above embodiments, the friction plate 8 has a cross-shaped structure, with its upper and lower ends locked in the inner core tube 11.

[0045] When the friction plate 8 is compressed, its upper and lower ends are locked onto the inner core tube 11, such as... Figure 4 , Figure 5 and Figure 6 As shown, the friction plate 8 is fixed in the axial direction of the inner core tube 11. When subjected to frictional force, the friction plate 8 does not move, and the deflection friction piece 10 is pressed against the friction plate 8. Thus, the deflection part 2 is locked and cannot drive the jaw 1 to deflect.

[0046] Based on the above embodiments, the locking seat, locking connection assembly 4 and fastening assembly are all located inside the inner core tube 11.

[0047] The locking mechanism is located inside the inner core tube 11 without making major changes to the main body structure. It does not affect the normal operation of the main body structure. The deflection part 2 can be locked by friction through a simple structure, ensuring the stability of the jaw 1 and achieving the technical effect of preventing vibration.

[0048] This disclosure also provides an electric stapler, including: a stapler body; a locking mechanism as described above for preventing jaw jitter; wherein the stapler body and the locking mechanism for preventing jaw jitter are detachably connected.

[0049] The main body disclosed herein can be an electric stapler. The locking mechanism used in the electric stapler can prevent the jaws of the electric stapler from shaking, avoid the jaws shaking from pulling on the tissue, improve the stability of the jaw deflection angle of the stapler, and achieve the best surgical results.

[0050] This disclosure also provides a medical device including a locking mechanism as described above to prevent jaw jitter.

[0051] The subject of this disclosure is not limited to electric staplers, but can also be other medical devices. As long as the locking mechanism can be combined with medical devices to achieve the technical effect of preventing vibration, it is within the protection scope of this disclosure.

[0052] In summary, the locking mechanism for preventing jaw tremors disclosed herein is controlled by a purely mechanical structure, resulting in high stability and strong safety. This locking mechanism can generate significant frictional force under relatively small positive pressure. It allows for free deflection at any angle and maintains stability after deflection, contributing to high-quality cutting and suturing and improving the practicality of the stapler. Furthermore, by utilizing different firing states, the locking mechanism switches between deflection and locking, reducing the user's skill requirements and enhancing the practicality and convenience of the stapler.

[0053] Furthermore, the structural form of this disclosure is not limited to the methods mentioned in the above figures and texts. Based on the innovative principles of this disclosure, the structural form can be changed according to the usage. For example, the locking mechanism can adjust the angle of the inclined surface of the locking wedge to achieve a self-locking state; the locking mechanism can be used on staplers with stepped or stepless deflection; the magnitude of the friction force of the locking mechanism can be achieved through material surface treatment; the magnitude of the friction force of the locking mechanism can be achieved by adjusting the number of friction surfaces.

[0054] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of this disclosure. It should be understood that the above descriptions are merely specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A lock mechanism to prevent jaw chatter, characterized by, It comprises: A locking seat arranged in the stepped surface of the main body firing part (3), one side of the locking seat is provided with a slope; A locking connection assembly (4) is sleeved on the firing part (3), one side of the locking connection assembly is tightly attached to the slope of the locking seat, and the other side is tightly attached to the deflection part (2) of the main body; A fastening assembly is arranged on the deflection part (2) to stably lock the deflection part (2); the fastening assembly comprises: a deflection part friction plate (10) arranged on the deflection part (2); a friction fixed plate (8) clamped in the inner core pipe; when the locking connection assembly (4) extrudes the deflection part (2), the deflection part friction plate (10) and the friction fixed plate (8) are subjected to positive pressure, so that the friction force is increased, the friction fixed plate (8) is fixed on the inner core pipe (11), and the deflection part friction plate (10) is static under the action of friction force; the deflection part friction plate (10) comprises a plurality of pieces; When the firing part (3) is fired, the locking seat pushes the locking connection assembly (4) to extrude the deflection part (2), the fastening assembly on the deflection part (2) stably locks the deflection part (2), and the jaw (1) is prevented from shaking; when the firing part (3) is withdrawn, the locking connection assembly (4) does not generate pressure on the deflection part (2), the deflection part (2) is freely movable, and the jaw (1) is freely deflected.

2. The jaw shake prevention lockout mechanism of claim 1, wherein, The locking seat comprises: A locking wedge (5) at least partially clamped in the stepped surface of the firing part (3); A spring member (6) connected with the locking wedge (5) for pushing the locking wedge (5) to slide.

3. The jaw shake prevention lockout mechanism of claim 2, wherein, The spring member (6) is arranged in a mounting groove, a spring guide (9) is arranged in the mounting groove, and the spring guide (9) makes the spring member (6) stretch and retract along the firing direction of the firing part (3).

4. The jaw shake prevention lockout mechanism of claim 1, wherein, The locking connection assembly (4) is a rectangular sleeve structure, which is sleeved on the firing part (3).

5. The jaw shake prevention lockout mechanism of claim 1, wherein, The friction fixed plate (8) is a cross-like structure, and the upper and lower ends thereof are clamped in the inner core pipe (11).

6. The jaw shake prevention lockout mechanism of claim 1, wherein, The locking seat, the locking connection assembly (4) and the fastening assembly are all arranged inside the inner core pipe (11).

7. An electrically powered anastomosis device, comprising: It comprises: An anastomat body; The locking mechanism for preventing the jaw from shaking according to any one of claims 1-6; The anastomat body and the locking mechanism for preventing the jaw from shaking are detachably connected.

8. A medical device, characterized by It comprises the locking mechanism for preventing the jaw from shaking according to any one of claims 1-6.

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