A head swing mechanism and end actuator of anastomosis device

Abstract

The utility model relates to a swing head mechanism and an end actuator of an anastomosis device, the swing head mechanism comprises a sleeve, a fixed block rotatably connected to the sleeve, and a push rod axially slidably arranged in the sleeve, the middle area of ​​the fixed block has a driving pin that is not coaxial with the rotating shaft of the fixed block, the far end of the push rod has a slide groove matching the driving pin, the driving pin is slidably arranged in the slide groove, in the initial state, the driving pin is located in the middle position of the slide groove, when the push rod moves toward the proximal end, the push rod drives the driving pin to move toward one end of the slide groove and drives the fixed block to rotate; when the push rod moves toward the far end, the push rod drives the driving pin to move toward the other end of the slide groove and drives the fixed block to rotate in the opposite direction. By arranging the driving pin in the middle area of ​​the fixed block, the space on both sides of the fixed block is saved, and further by the design of the slide groove, a larger rotation angle can be achieved, and the swing head mechanism can realize the rotation of the working head even with one push rod, and the structure is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of staplers, in particular to a head swing mechanism and an end actuator of a stapler. Background Art

[0002] When using a stapler to cut and suture tissue, due to the position limitation of the puncture device and the different positions of the cut tissue, a swing head mechanism is generally used to adjust the swing angle of the clamping assembly at the front end of the stapler.

[0003] The swing of the existing stapler is mainly achieved by the cooperation of two joint push rods located on the left and right sides of the sleeve and two pins on the left and right sides of the fixed block. For example, patents CN 218899553 U, CN103315788B, etc. During the pulling process of the joint push rod, due to space limitations, this method has the problem of a small swing angle. In addition, with the requirement for miniaturization of laparoscopic staplers, this type of swing method is not applicable. Utility Model Content

[0004] The utility model aims to provide a head swing mechanism of anastomosis apparatus with a simpler structure, a larger swing angle and suitable for a stapler with a thinner diameter.

[0005] Another object of the utility model is to provide an end actuator of a stapler.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A head swing mechanism of a stapler, the head swing mechanism comprising:

[0008] casing;

[0009] A fixed block, the fixed block is rotatably connected to the sleeve, and a middle area of ​​the fixed block has a driving pin that is not coaxial with the rotating shaft of the fixed block;

[0010] A push rod, the push rod is configured to be able to slide axially in the sleeve, the push rod has a slide groove matching the driving pin at the distal end, and the driving pin is slidably arranged in the slide groove,

[0011] In the initial state, the driving pin is located in the middle position of the slide slot. When the push rod moves toward the proximal end, the push rod drives the driving pin to move toward one end of the slide slot and drives the fixed block to rotate; when the push rod moves toward the distal end, the push rod drives the driving pin to move toward the other end of the slide slot and drives the fixed block to rotate in the opposite direction.

[0012] Preferably, one of the left and right side portions of the slide groove extends toward the distal end, and the other extends toward the proximal end.

[0013] Further preferably, the left and right sides of the slide groove are centrally symmetrical.

[0014] More preferably, the slide groove is S-shaped.

[0015] Preferably, the axis center line of the fixed block shaft is parallel to the axis center line of the driving pin, and the projections of both on the horizontal plane are located on the axis center line of the sleeve.

[0016] Preferably, the driving pin is arranged at the distal end of the rotating shaft of the fixing block.

[0017] Further preferably, the driving pin is arranged on the upper side and / or the lower side of the fixing block.

[0018] In some embodiments, the push rod has a group disposed on the upper side or the lower side of the sleeve.

[0019] In some embodiments, the push rod has two groups, which are respectively arranged on the upper side and the lower side of the sleeve.

[0020] Furthermore, the two groups of push rods are connected through a linkage mechanism.

[0021] The utility model also provides an end actuator, including the swing head mechanism as described above, a clamping assembly connected to the fixed block and a push knife assembly movably arranged in the sleeve, wherein the clamping assembly includes a pair of clamping members that can be opened or closed relative to each other.

[0022] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0023] The swing head mechanism provided by the utility model saves space on both sides of the fixed block by setting a driving pin in the middle area of ​​the fixed block, which is conducive to reducing the size to match the anastomosis device with a smaller diameter; further, through the design of the slide groove, a larger rotation angle can be achieved. In addition, the swing head mechanism does not require two push rods, and even if one push rod is used, the rotation of the working head can be achieved, and the structure is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the end effector in Example 1;

[0025] Figure 2 is an exploded schematic diagram of the end effector in Example 1;

[0026] Figure 3 It is a structural schematic diagram of the end effector in Example 1 rotating to the left;

[0027] Figure 4 is a schematic structural diagram of the end effector in Example 1 from another angle;

[0028] Figure 5 for Figure 4 Section view on plane AA;

[0029] Figure 6 for Figure 5 A magnified schematic diagram of part B;

[0030] Figure 7 is a schematic structural diagram of the push rod in Example 1;

[0031] Figure 8 It is a schematic diagram of the structure of the fixing block and the connecting piece in Example 1;

[0032] Fig. 9 This is a schematic structural diagram of the fixing block and the connecting piece in Embodiment 1 from another angle;

[0033] Fig.10 for Fig. 9 Sectional view on CC plane;

[0034] Among them: 1. casing; 11. outer casing; 12. inner casing; 13. condom;

[0035] 2. Fixed block; 21. Upper fixed block; 22. Lower fixed block; 23. Driving pin; 24. Fixed block shaft;

[0036] 3. Push rod; 31. Slide;

[0037] 4. Clamping assembly; 41. Nail magazine assembly; 42. Nail support;

[0038] 5. Push knife assembly;

[0039] 6. Connecting piece;

[0040] X1, the axis of the fixed block shaft. DETAILED DESCRIPTION

[0041] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0042] In the description of the embodiments of the present utility model, it is necessary to understand that the distal end refers to the end of the instrument or component away from the operator, and the proximal end refers to the end of the instrument or component close to the operator; the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the instrument or component; the inside and the outside are positions defined by the distance relative to the center of the instrument or component, where the inside is the position close to the center of the instrument or component, and the outside is the position away from the center of the instrument or component; the upper and the lower refer to the orientation of the instrument in actual use or working state. The description of the above-mentioned directional words is only for the convenience of describing the embodiments of the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0044] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] The disclosure above provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0046] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0047] Example 1

[0048] An end effector of a stapler, such as Figures 1 to 10As shown, it includes a swing head mechanism, a clamping assembly 4 and a push knife assembly 5.

[0049] The swing head mechanism comprises a sleeve 1 , a fixed block 2 rotatably connected to the sleeve 1 , and a push rod 3 configured to be able to slide axially in the sleeve 1 .

[0050] The fixed block 2 is rotatably connected to the sleeve 1, and the middle area of ​​the fixed block 2 is provided with a fixed block rotating shaft 24 and a driving pin 23 which is not coaxial with the fixed block rotating shaft 24. The distal end of the push rod 3 has a slide groove 31 which matches the driving pin 23, and the driving pin 23 is slidably arranged in the slide groove 31. In the initial state, the driving pin 23 is located in the middle position of the slide groove 31. When the push rod 3 moves toward the proximal end, the push rod 3 drives the driving pin 23 to move toward one end of the slide groove 31 and drives the fixed block 2 to rotate; when the push rod 3 moves toward the distal end, the push rod 3 drives the driving pin 23 to move toward the other end of the slide groove 31 and drives the fixed block 2 to rotate in the opposite direction. On the one hand, by arranging the driving pin 23 in the middle area of ​​the fixed block 2, the space on both sides of the fixed block 2 is saved, so that the width of the fixed block 2 can be reduced, making it suitable for anastomosis devices with smaller diameters; on the other hand, through the design of the slide groove 31 and its cooperation with the driving pin 23, a larger angle of swing can be achieved, and there is no need to design two groups of push rods 3, one group of push rods 3 can also achieve swing, and the structure is simpler.

[0051] Furthermore, the proximal end of the push rod 3 is connected to a driving mechanism of the stapler (not shown in the figure) and can move under the drive of the driving mechanism. The push rod 3 has a group located on the upper side or the lower side of the sleeve 1, or has two groups located on the upper and lower sides of the sleeve 1. In this embodiment, the push rod 3 has a group located on the upper side of the sleeve 1, and the structure is simpler. The left and right side portions of the slide groove 31 at the distal end of the push rod 3 are symmetrical, one of the two side portions is bent and extended toward the distal end, and the other is bent and extended toward the proximal end. In this embodiment, the slide groove 31 is S-shaped.

[0052] The distal end of the fixed block 2 is connected to the clamping assembly 4, and the proximal end is provided with a driving pin 23 and a fixed block shaft 24. The driving pin 23 is specifically located at the distal end of the fixed block shaft 24, and its axis is parallel to the axis X1 of the fixed block shaft, and the projections of both on the horizontal plane are located on the axis of the sleeve 1. The fixed block 2 is rotatably connected to the sleeve 1 through two upper and lower connecting pieces 6. Specifically, the distal end of the connecting piece 6 is rotatably connected to the fixed block shaft 24, and the proximal end is fixedly connected to the sleeve 1. The fixed block 2 includes an upper fixed block 21 and a lower fixed block 22 connected as one body.

[0053] In order to provide guidance for the push rod 3 and the push blade assembly 5, the sleeve 1 is divided into an outer sleeve 11 and an inner sleeve 12. The push rod 3 and the push blade assembly 5 are located in the inner sleeve 12. The inner sleeve 12 is provided with a push rod slide and a push blade slide that match the push rod 3 and the push blade assembly 5. The push rod 3 and the push blade assembly 5 do not interfere with each other in their movements. The sleeve 1 also includes a condom 13 disposed between the outer sleeve 11 and the inner sleeve 12 and located at the proximal end of the outer sleeve 11.

[0054] The push knife assembly 5 includes a push knife rod and a cutting knife arranged at the distal end of the push knife rod. The proximal end of the push knife rod is operably connected to a braking source such as a handle of a medical stapler. It moves axially along the sleeve 1. The specific structure can also refer to the prior art.

[0055] The clamping assembly 4 includes a pair of clamping members that can be opened or closed relative to each other, and the pair of clamping members are a nail magazine assembly 41 and a nail support seat 42. The specific structure can refer to the prior art.

[0056] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A head swing mechanism of a stapler, characterized in that: The swing head mechanism comprises: casing; A fixed block, the fixed block is rotatably connected to the sleeve, and a middle area of ​​the fixed block has a driving pin that is not coaxial with the rotating shaft of the fixed block; A push rod, the push rod is configured to be able to slide axially in the sleeve, the push rod has a slide groove matching the driving pin at the distal end, and the driving pin is slidably arranged in the slide groove, In the initial state, the driving pin is located in the middle position of the slide slot. When the push rod moves toward the proximal end, the push rod drives the driving pin to move toward one end of the slide slot and drives the fixed block to rotate; when the push rod moves toward the distal end, the push rod drives the driving pin to move toward the other end of the slide slot and drives the fixed block to rotate in the opposite direction.

2. The stapler head swing mechanism according to claim 1, characterized in that: One of the left and right side portions of the slide groove extends toward the distal end, and the other extends toward the proximal end.

3. The head swing mechanism of the stapler according to claim 2, characterized in that: The left and right sides of the slide groove are centrally symmetrical.

4. The head swing mechanism of the stapler according to claim 3, characterized in that: The slide groove is S-shaped.

5. The head swing mechanism of the stapler according to claim 1, characterized in that: The axis center line of the fixed block rotating shaft is parallel to the axis center line of the driving pin, and the projections of both on the horizontal plane are located on the axis center line of the sleeve.

6. The head swing mechanism of the stapler according to claim 1, characterized in that: The driving pin is arranged at the distal end of the rotating shaft of the fixing block.

7. The head swing mechanism of the stapler according to claim 1, characterized in that: The push rod has a group arranged on the upper side or the lower side of the sleeve.

8. The head swing mechanism of the stapler according to claim 1, characterized in that: The push rod has two groups which are respectively arranged on the upper side and the lower side of the sleeve.

9. An end effector, characterized in that: It comprises a swing head mechanism as described in any one of claims 1 to 8, a clamping assembly connected to a fixed block and a push knife assembly movably arranged in a sleeve, wherein the clamping assembly comprises a pair of clamping members that can be opened or closed relative to each other.

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