Adjusting mechanism for forming height of anastomosis nail and tubular anastomat using same

Abstract

The utility model discloses an anastomosis nail forming height adjusting mechanism and a tubular anastomat using the anastomosis nail forming height adjusting mechanism. The anastomosis nail forming height adjusting mechanism comprises an outer shell, a lead screw arranged in the outer shell, an adjusting block assembly arranged on the lead screw in a sleeving mode and an adjusting nut arranged on the outer side of the outer shell and used in cooperation with the lead screw. The adjusting block assembly comprises a U-shaped adjusting block, a kidney-shaped guide groove formed in the U-shaped adjusting block and a guide screw suitable for penetrating through the kidney-shaped guide groove to be in fastening fit with the lead screw. The long axis direction of the kidney-shaped guide groove extends in the axial direction of the lead screw. The U-shaped adjusting block is further provided with an indicating piece. The outer shell is provided with a window suitable for observing the indicating sheet from the outer side of the outer shell; the outer shell is further provided with an adjusting hole allowing an adjusting tool to penetrate through to adjust the position of the U-shaped adjusting block in the outer shell.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an adjusting mechanism for the forming height of anastomotic staples and a tubular stapler using the same. Background Art

[0002] At present, tubular staplers are widely used in surgical operations, which can reduce the operation time and improve the quality of the operation. For example, tubular staplers are often used in end-to-end, end-to-side and side-to-side anastomosis operations of the esophagus, stomach, duodenum, small intestine, colon and rectum in the digestive tract. They are particularly suitable for parts that are difficult to expose and operate, and are widely used. At present, when assembling tubular stapler products in the early stage, each tubular stapler needs to adjust the height of the suture staples.

[0003] Based on the above situation, in the prior art, an adjustment component for adjusting the indicator needle is designed in the tubular stapler. For example, in the indicator safety device of the disposable rotary tubular stapler disclosed in the announcement number CN20973982U, the position of the indicator needle relative to the window is adjusted by the indicator needle, pointer pull rod, adjustment block, guide screw and compression spring used in combination. Another example is a tubular stapler safety device disclosed in the announcement number CN213465158U. In the above-mentioned public technologies, it is necessary to adopt the coordination of the adjustment block, pointer pull rod and indicator needle, and realize the linkage of the indicator pull rod and the indicator needle through the movement of the adjustment block, so as to meet the adjustment demand for the forming height of the staple. In this regard, its overall structure is relatively complex. For minimally invasive surgical instruments, the complexity of the structure has high production costs on the one hand, and on the other hand, the assembly precision between the components is required to be high to ensure the stability and reliability of the linkage process, so the overall assembly difficulty is also high.

[0004] Therefore, with regard to the problems existing in the prior art with the adjustment mechanism for the staple forming height, it is necessary to further optimize the related adjustment structure. Utility Model Content

[0005] The first purpose of the utility model is to provide a staple forming height adjustment mechanism to solve the technical problem of simplifying the overall structure of the staple forming height adjustment mechanism.

[0006] The second object of the utility model is to provide a tubular stapler to solve the technical problem of simplifying the overall structure of the suture staple forming height adjustment mechanism of the tubular stapler.

[0007] The regulating mechanism of the staple forming height of the utility model is realized as follows:

[0008] A mechanism for adjusting the forming height of anastomotic staples, comprising:

[0009] An outer shell, a screw rod arranged in the outer shell, an adjustment block assembly sleeved on the screw rod, and an adjustment nut arranged outside the outer shell and used in conjunction with the screw rod; wherein

[0010] The adjusting block assembly comprises a U-shaped adjusting block, a waist-shaped guide groove provided on the U-shaped adjusting block, and a guide screw adapted to penetrate the waist-shaped guide groove and be fastened with the screw rod; the long axis direction of the waist-shaped guide groove extends along the axial direction of the screw rod; and

[0011] The U-shaped adjustment block is also provided with an indicator sheet; the outer shell is provided with a window suitable for observing the indicator sheet from the outside of the outer shell;

[0012] The outer shell is also provided with an adjustment hole suitable for an adjustment tool to pass through to adjust the position of the U-shaped adjustment block in the outer shell.

[0013] In an optional implementation of the utility model, the U-shaped adjustment block includes a base and a pair of fins connected to the base; a space suitable for the screw rod to pass through is formed between the pair of fins;

[0014] The waist-shaped guide groove is arranged on the base.

[0015] In an optional implementation of the present invention, the adjustment hole is suitable for exposing one of the fin plates of a pair of fin plates.

[0016] In an optional implementation of the present invention, the indicator piece is convexly arranged on the side end surface of the base body facing away from the pair of fins.

[0017] In an optional implementation of the present invention, a limiting plate cooperating with at least one of the pair of fin plates is further provided in the outer shell.

[0018] In an optional implementation of the present invention, when the limit plate and the corresponding fin plate are in place, there is a fitting gap between the base and the screw rod, and the pair of fin plates are suitable for forming sliding friction with the outer side wall of the screw rod.

[0019] In an optional implementation of the utility model, a plurality of limiting grooves are continuously arranged on the limiting plate along the axial direction of the screw rod; and

[0020] The fin plate used for being connected with the limiting plate is provided with at least one limiting tooth used for being matched with the limiting groove.

[0021] In an optional implementation of the utility model, the outer diameter of the screw rod of the guide screw is smaller than the inner diameter of the waist-shaped guide groove in the long axis direction; and

[0022] The screw rod is also provided with a connecting hole for cooperating with the screw thread of the guide screw.

[0023] In an optional implementation of the utility model, the stapler forming height adjustment mechanism further includes a connecting piece connected to the screw rod, a guide shaft connected to the connecting piece, and an outer tube provided on the outer layer of the connecting piece and suitable for the connecting piece to penetrate; wherein

[0024] The connecting piece and the guide shaft are suitable for synchronous movement in the outer tube along with the axial displacement of the screw rod.

[0025] The tubular stapler of the utility model is realized in this way:

[0026] A tubular stapler comprises: the aforementioned staple forming height adjustment mechanism, and a staple cartridge assembly and a staple support assembly arranged at the distal end of an outer shell;

[0027] The nail cartridge assembly is provided with a channel suitable for the guide shaft to pass through; and

[0028] One end of the guide shaft away from the connecting piece is connected to the dowel seat assembly.

[0029] By adopting the above technical solution, the utility model has the following beneficial effects: the adjustment mechanism for the forming height of the stapler of the utility model and the tubular stapler using the same, through the indicator sheet provided on the U-shaped adjustment block and the window provided on the outer shell for observing the indicator sheet from the outside of the outer shell, the adjustment of the position of the U-shaped adjustment block in the outer shell can be observed intuitively, and no redundant linkage parts are required. Therefore, the present application can observe the position of the U-shaped adjustment block through a simplified structure, which not only reduces the difficulty of assembly, but also reduces the production cost. Furthermore, through the adjustment hole provided on the outer shell for adjusting the position of the U-shaped adjustment block in the outer shell through which the adjustment tool passes, the adjustment of the position of the U-shaped adjustment block can be achieved directly by using the tool passing through the above adjustment hole, which is convenient and efficient to operate and can be completed with one hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the adjustment mechanism for the forming height of the stapler of the utility model;

[0031] Figure 2 The schematic diagram of the local structure of the adjustment mechanism for the staple forming height of the utility model is shown in FIG. Figure 1 ;

[0032] Figure 3 The schematic diagram of the local structure of the adjustment mechanism for the staple forming height of the utility model is shown in FIG. Figure 2 ;

[0033] Figure 4 The schematic diagram of the local structure of the adjustment mechanism for the staple forming height of the utility model is shown in FIG. Figure 3 ;

[0034] Figure 5 The schematic diagram of the local structure of the adjustment mechanism for the staple forming height of the utility model is shown in FIG. Figure 4 ;

[0035] Figure 6 It is a schematic diagram of the structure of the U-shaped adjustment block of the adjustment mechanism for the forming height of the staples of the utility model;

[0036] Figure 7 It is a schematic cross-sectional structural diagram of the tubular stapler of the present utility model.

[0037] In the figure: outer shell 1, adjustment hole 12, perforation 13, window 2, positioning identification line 21, U-shaped adjustment block 3, base 31, fin plate 32, waist-shaped guide groove 33, limit tooth 34, indicator plate 4, guide screw 5, screw rod 61, connecting hole 611, adjustment nut 62, connecting plate 64, guide shaft 65, outer tube 66, nail support seat assembly 67, nail magazine assembly 68, gasket 69, limit plate 7, limit groove 71. DETAILED DESCRIPTION

[0038] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0039] Embodiment 1:

[0040] See also Figures 1 to 7 As shown, this embodiment provides an adjustment mechanism for the forming height of the staples, including: an outer shell 1, a screw rod 61 arranged in the outer shell 1 and an adjustment block 3 component sleeved on the screw rod 61, and an adjustment nut 62 arranged on the outside of the outer shell 1 and used in conjunction with the screw rod 61.

[0041] Specifically, the adjustment block 3 assembly used in this embodiment includes a U-shaped adjustment block 3, a waist-shaped guide groove 33 provided on the U-shaped adjustment block 3, and a guide screw 5 suitable for passing through the waist-shaped guide groove 33 and then being fastened with the screw rod 61; the long axis direction of the waist-shaped guide groove 33 extends along the axial direction of the screw rod 61.

[0042] It should be noted that although the U-shaped adjustment block 3 is sleeved on the screw 61, it will not move synchronously with the axial displacement of the screw 61. Only the guide screw 5 will move synchronously with the axial displacement of the screw 61. In order to meet the above-mentioned usage requirements, the outer diameter of the screw of the guide screw 5 is smaller than the inner diameter of the long axis direction of the waist-shaped guide groove 33; and the screw 61 is also provided with a connecting hole 611 for matching with the screw thread of the guide screw 5. In this structure, the screw 61 can drive the guide screw 5 to move synchronously, and the movement range of the guide screw 5 in turn limits the movement range of the screw 61, and the movement range of the guide screw 5 is limited by the waist-shaped guide groove 33. Therefore, the adjustment of the position of the U-shaped adjustment block 3 in the outer shell 1 can change the matching position of the waist-shaped guide groove 33 and the guide screw 5, thereby changing the movement range of the screw 61.

[0043] Based on the above situation, in order to accurately grasp the adjustment of the motion range of the screw rod 61, it is necessary to accurately grasp the adjustment of the position of the U-shaped adjustment block 3 in the outer shell 1. For this purpose, the present embodiment has made the following design:

[0044] The U-shaped adjustment block 3 is also provided with an indicator sheet 4; the outer shell 1 is provided with a window 2 suitable for observing the indicator sheet 4 from the outside of the outer shell 1; the indicator sheet 4 is fixedly connected to the U-shaped adjustment block 3, so that the indicator sheet 4 can move synchronously with the U-shaped adjustment block 3, so that the position of the U-shaped adjustment block 3 can be determined by observing the position of the indicator sheet 4. The window 2 is transparent or hollow, and the indicator sheet 4 in the outer shell 1 can be observed through the window 2. Secondly, a certain positioning mark line 21 can be set on the window 2, so that the position of the indicator sheet 4 can be determined more accurately.

[0045] Next, it should be explained that in order to meet the use requirements for adjusting the position of the U-shaped adjustment block 3 in the outer shell 1, an adjustment hole 12 suitable for an adjustment tool to pass through to adjust the position of the U-shaped adjustment block 3 in the outer shell 1 is also provided on the shell. The adjustment hole 12 here is an opening formed in the outer shell 1 through a hollow shape, and the U-shaped adjustment block 3 can be pushed by passing a screwdriver through the adjustment hole 12, thereby adjusting its position in the outer shell 1. Of course, it can be understood that the outer shell 1 is also provided with a through hole 13 suitable for a tool to pass through for locking the guide screw 5.

[0046] Based on the above situation, the specific structure of the U-shaped adjustment block 3 used in this embodiment is as follows:

[0047] The U-shaped adjustment block 3 includes a base 31 and a pair of fins 32 connected to the base 31; a space suitable for the screw rod 61 to pass through is formed between the pair of fins 32; and a waist-shaped guide groove 33 is provided on the base 31. Under this structure, the guide screw 5 penetrates the waist-shaped guide groove 33 and then locks with the screw rod 61, and the nut portion of the guide screw 5 is always located above the waist-shaped guide groove 33 of the base 31.

[0048] Based on the U-shaped adjustment block 3 of the above structure, the indicator sheet 4, the adjustment hole 12 and the through hole 13 of this embodiment can be specifically arranged in the following manner:

[0049] The first one, with reference to the accompanying drawings as an example, first, the indicator sheet 4 is protruding on the side end face of the base 31 facing away from the pair of fins 32. Specifically, the indicator sheet 4 is connected to the side edge of the base 31 along the axial direction of the screw rod 61 and facing away from the adjusting nut 62, and the indicator sheet 4 and the base 31 are arranged vertically. The perforation 13 is designed on the side end face of the outer shell 1 where the window 2 is arranged, and the perforation 13 is designed next to the window 2. Under this design, the perforation 13 and the window 2 do not interfere with each other and can play their roles independently. The adjustment hole 12 is suitable for exposing one of the fins 32 of a pair of fins 32. At this time, the adjustment hole 12 and the perforation 13 are located on different side end faces of the outer shell 1 and do not interfere with each other.

[0050] In the second optional implementation, the indicator piece 4 is protruded from one of the fins 32 of a pair of fins 32, and the through hole 13 and the adjustment hole 12 can be combined into the same opening, and the opening corresponds to the base 31. In this way, not only the position of the U-shaped adjustment block 3 in the outer shell 1 can be adjusted through this opening, but also the guide screw 5 can be adjusted. At this time, the window 2 is designed on the side end surface of the outer shell 1 corresponding to the indicator piece 4.

[0051] The above two situations both meet the use requirements of this embodiment, and this embodiment does not make an absolute limitation on this.

[0052] Next, it is to be explained that, in order to limit the position of the U-shaped adjustment block 3 in the outer shell 1, the outer shell 1 of the present embodiment is further provided with a limit plate 7 that cooperates with at least one of the pair of fin plates 32 so that the position can be fixed at a determined position after being adjusted to a certain position and is not easy to shake. In this regard, it should be explained that when the limit plate 7 is in place with the corresponding fin plate 32, there is a matching gap between the base 31 and the screw rod 61, and the pair of fin plates 32 are suitable for forming sliding friction with the outer side wall of the screw rod 61.

[0053] In combination with a specific optional implementation, a plurality of limiting grooves 71 are continuously arranged along the axial direction of the screw rod 61 on the limiting plate 7; and at least one limiting tooth 34 for matching with the limiting groove 71 is provided on the fin plate 32 used to cooperate with the limiting plate 7. The accompanying drawings of this embodiment only take the case where a limiting tooth 34 is designed on a fin plate 32 as an example. When the guide screw 5 is not locked in place relative to the screw rod 61, the guide screw 5 will not form a limit for the position of the base 31. In this way, by using a tool to move the U-shaped adjustment block 3, the limiting tooth 34 can be matched with different limiting grooves 71 on the limiting plate 7, thereby adjusting the position of the U-shaped adjustment block 3 in the outer shell 1. After completing the position adjustment of the U-shaped adjustment block 3, the guide screw 5 is locked again, so that the entire U-shaped adjustment block 3 is limited between the nut part of the guide screw 5 and the limiting plate 7, so that the position of the U-shaped adjustment block 3 in the outer shell 1 is reliable and does not shake. Based on this situation, when the adjusting nut 62 is rotated to make the screw 61 move along its axial direction, the guiding screw 5 moves synchronously, and there is sliding friction between the guiding screw 5 and the base 31 of the U-shaped adjusting block 3, but it will not affect the cooperation between the guiding screw 5 and the limiting plate 7 to reliably limit the position of the U-shaped adjusting block 3.

[0054] In addition, it is necessary to explain that the adjustment mechanism for the forming height of the staples in this embodiment also includes a connecting piece 64 connected to the screw rod 61, a guide shaft 65 connected to the connecting piece 64, and an outer tube 66 arranged on the outer layer of the connecting piece 64 and suitable for the connecting piece 64 to pass through; wherein the connecting piece 64 and the guide shaft 65 are suitable for synchronous movement in the outer tube 66 with the axial displacement of the screw rod 61.

[0055] Embodiment 2:

[0056] See also Figures 1 to 7 As shown, based on the staple forming height adjustment mechanism of embodiment 1, this embodiment provides a tubular stapler, comprising: the staple forming height adjustment mechanism of embodiment 1, and a staple cartridge assembly 68 and an anvil assembly 67 disposed at the distal end of the outer shell 1; wherein the staple cartridge assembly 68 is provided with a channel suitable for the guide shaft 65 to pass through; and the end of the guide shaft 65 away from the connecting piece 64 is connected to the anvil assembly 67. Therefore, when the user rotates the adjustment nut 62, the anvil assembly 67 can be driven to move away from or close to the staple cartridge assembly 68, thereby adjusting the forming height of the suture staples.

[0057] In summary, the general usage process of the tubular stapler of this embodiment is as follows:

[0058] When it is necessary to adjust the position of the indicator piece 4, a screwdriver is manually used to loosen the guide screw 5, and then a tool is used to pass through the adjustment hole 12 to push the U-shaped adjustment block 3, so that the indicator piece 4 connected to the U-shaped adjustment block 3 enters the positioning identification line 21 in the window 2 (for gaskets 69 of different thicknesses, the corresponding indicator piece 4 needs to enter different positioning identification lines 21 in the window 2), and then the guide screw 5 is locked, and the adjustment of the position of the U-shaped adjustment block 3 in the outer shell 1 is completed.

[0059] Furthermore, for example, the position of the U-shaped adjustment block 3 is adjusted so that the indicator piece 4 enters the positioning mark line 21 in the window 2, which corresponds to the spacing of 0.5 mm between the anvil assembly 67 and the staple magazine assembly 68. This process verifies the staple forming height achieved by adjusting the position of the above-mentioned U-shaped adjustment block 3 in the outer shell 1. The adjustment nut 62, the screw rod 61, the connecting piece 64, the guide shaft 65, and the anvil assembly 67 are interconnected, so when the adjustment nut 62 is rotated, a force is applied to the screw rod 61 to move away from the adjustment nut 62, the screw rod 61 applies a thrust to the connecting piece 64, the connecting piece 64 applies a thrust to the guide shaft 65, and the guide shaft 65 applies a thrust to the anvil assembly 67 to move the anvil assembly 67 away from the staple magazine assembly 68. When the gap between the anvil assembly 67 and the staple magazine assembly 68 is sufficient, stop rotating the adjustment nut 62. A gasket 69 with a thickness of, for example but not limited to, 0.5 mm is placed between the anvil assembly 67 and the staple magazine assembly 68. At this time, the adjusting nut 62 is rotated in the opposite direction, and the anvil assembly 67 is close to the staple magazine assembly 68. After the gasket 69 is clamped, the forming height of the staples corresponding to the tubular stapler can be determined.

[0060] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0061] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 present invention.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the 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 present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0064] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0065] In 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 means 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 means that the first feature is lower in level than the second feature.

Claims

1. A mechanism for adjusting the forming height of staples, characterized in that: include: An outer shell, a screw rod disposed in the outer shell, an adjusting block assembly sleeved on the screw rod, and an adjusting nut disposed outside the outer shell and used in conjunction with the screw rod; in The adjusting block assembly comprises a U-shaped adjusting block, a waist-shaped guide groove provided on the U-shaped adjusting block, and a guide screw adapted to penetrate the waist-shaped guide groove and be fastened with the screw rod; the long axis direction of the waist-shaped guide groove extends along the axial direction of the screw rod; and The U-shaped adjustment block is also provided with an indicator sheet; the outer shell is provided with a window suitable for observing the indicator sheet from the outside of the outer shell; The outer shell is also provided with an adjustment hole suitable for an adjustment tool to pass through to adjust the position of the U-shaped adjustment block in the outer shell.

2. The staple forming height adjustment mechanism according to claim 1, characterized in that: The U-shaped adjustment block comprises a base and a pair of fins connected to the base; a space suitable for the screw rod to pass through is formed between the pair of fins; The waist-shaped guide groove is arranged on the base.

3. The staple forming height adjustment mechanism according to claim 2, characterized in that: The adjustment hole is suitable for exposing one of the pair of fins.

4. The staple forming height adjustment mechanism according to claim 2, characterized in that: The indicating piece is convexly arranged on the side end surface of the base body which faces away from the pair of fin plates.

5. The staple forming height adjustment mechanism according to any one of claims 2 to 4, characterized in that: The outer shell is also provided with a limiting plate matched with at least one of the pair of fin plates.

6. The staple forming height adjustment mechanism according to claim 5, characterized in that: When the limiting plate and the corresponding fin plate are in place, there is a matching gap between the base and the screw rod, and the pair of fin plates are suitable for forming sliding friction with the outer side wall of the screw rod.

7. The staple forming height adjustment mechanism according to claim 5, characterized in that: The limiting plate is provided with a plurality of limiting grooves arranged continuously along the axial direction of the screw rod; and The fin plate used for being connected with the limiting plate is provided with at least one limiting tooth used for being matched with the limiting groove.

8. The staple forming height adjustment mechanism according to claim 1, characterized in that: The outer diameter of the screw rod of the guide screw is smaller than the inner diameter of the waist-shaped guide groove in the long axis direction; and The screw rod is also provided with a connecting hole for cooperating with the screw thread of the guide screw.

9. The staple forming height adjustment mechanism according to claim 8, characterized in that: The staple forming height adjustment mechanism also includes a connecting piece connected to the screw rod, a guide shaft connected to the connecting piece, and an outer tube provided on the outer layer of the connecting piece and suitable for the connecting piece to penetrate; in The connecting piece and the guide shaft are suitable for synchronous movement in the outer tube along with the axial displacement of the screw rod.

10. A tubular stapler, characterized in that: include: The staple forming height adjustment mechanism according to any one of claims 1 to 9, and the staple cartridge assembly and the staple anvil assembly provided at the distal end of the outer shell; in The nail cartridge assembly is provided with a channel suitable for the guide shaft to pass through; and One end of the guide shaft away from the connecting piece is connected to the dowel seat assembly.

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