Anastomat

Abstract

The utility model discloses an anastomat, and belongs to the technical field of medical instruments. The anastomat comprises a limiting unit and a retreating unit, the limiting unit comprises a limiting piece rotationally connected with the mounting shell, a limiting groove is formed in the front end of the percussion rack, and a first stopping part and a second stopping part are arranged on the limiting piece; the first stopping part can fall into the limiting groove and abut against the side wall of the limiting groove. The mounting pipe is movably sleeved with the retreating unit, the first end of the retreating unit is used for abutting against the second stopping part, the second end of the retreating unit is used for abutting against the nail box assembly, and the retreating unit can move in the reverse direction of the first direction so as to push the second stopping part. When the nail box assembly is not installed, the percussion handle piece of the anastomat cannot push the percussion rack to move forwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially relates to a kind of anastomat. BACKGROUND

[0002] Endoscopic surgery, also known as minimally invasive surgery, is a surgical method that uses a small incision to place instruments into the body cavity (such as the abdominal cavity, uterine cavity, thoracic cavity, etc.), and then uses a television screen to examine, diagnose and treat diseases in the cavity. Its principle lies in using modern optics, electronics, mechanics and other high-tech means to send surgical instruments and camera equipment into the human body through a small incision. Surgeons can clearly observe the situation in the surgical area through real-time images on the television screen and perform precise surgical operations.

[0003] Endoscopic anastomat is one of the important instruments for endoscopic surgery. It is also known as endoscopic cutting anastomat and disposable cartridge. It is used for operations such as disconnection, resection and anastomosis of tissues under endoscopic surgery.

[0004] However, in the prior art, when the endoscopic anastomat is not installed with the cartridge assembly, the firing handle assembly can still push the firing rack forward due to misoperation. When the endoscopic anastomat is installed with the cartridge assembly, the operator needs to repeatedly pull back the firing rack to reset, which prolongs the operation time.

[0005] Therefore, there is an urgent need to provide an anastomat to solve the above problems. SUMMARY

[0006] The purpose of the utility model is to provide an anastomat that does not push the firing rack forward when the cartridge assembly is not installed, avoiding the operator from pulling back the firing rack to reset.

[0007] To achieve the above purpose, the following technical solutions are provided:

[0008] The anastomat comprises a mounting shell, a firing rack, a mounting tube and a firing handle assembly. The mounting shell has a receiving cavity inside. The firing rack is connected to the mounting tube and is arranged inside the mounting shell. The end of the mounting tube away from the firing rack is used to insert the cartridge assembly. The firing handle assembly is rotationally connected to the mounting shell. Rotating the firing handle assembly can move the firing rack in the first direction. The anastomat further comprises:

[0009] The limiting unit comprises a limiting piece rotationally connected to the mounting shell. The front end of the firing rack is provided with a limiting slot. The limiting piece is provided with a first stopper and a second stopper. The first stopper can fall into the limiting slot and abut against the side wall of the limiting slot.

[0010] A return unit movably arranged on the mounting pipe, a first end of the return unit configured to abut against the second stopper, a second end of the return unit configured to abut against the staple cartridge assembly, the return unit capable of moving in a reverse direction of the first direction to push the second stopper.

[0011] As an alternative to the anastomat, a through hole is arranged on the first stopper, a clamping groove is arranged on the second stopper, and a recess is arranged on an inner wall surface of the mounting shell, the limiting unit further comprising:

[0012] A rotating pin shaft, one end of the rotating pin shaft movably arranged in the recess, and the through hole arranged on the other end of the rotating pin shaft;

[0013] An elastic member, a helical segment of the elastic member movably arranged on the rotating pin shaft, one end of the elastic member abutting against the limiting member, and the other end of the elastic member abutting against the mounting shell.

[0014] As an alternative to the anastomat, a first limiting step extending in the first direction is arranged on an outer wall surface of the firing rack, and a second limiting step is arranged on an inner side of the second stopper, the second limiting step stopped by the first limiting step.

[0015] As an alternative to the anastomat, a first extension pushing member is arranged on the first end of the return unit, and one end of the first extension pushing member away from the return unit abutting against the second stopper.

[0016] As an alternative to the anastomat, the first extension pushing member is provided with a mounting slot with one end passing through, the mounting slot extending in the first direction, a first return spring arranged in the mounting slot, one end of the first return spring passing out of the mounting slot and abutting against the second stopper.

[0017] As an alternative to the anastomat, the first extension pushing member is provided with a contact plate, and the contact plate abutting against the first end of the return unit.

[0018] As an alternative to the anastomat, a second extension pushing member is arranged on the second end of the return unit, and the second extension pushing member abutting against the staple cartridge assembly.

[0019] As an alternative to the anastomat, a hook hole is arranged on the firing handle member, and the anastomat further comprising:

[0020] A second return spring, one end of the second return spring fixedly connected with the mounting shell, and the other end of the second return spring connected with the hook hole.

[0021] As an alternative to the anastomat, an anti-slip structure is arranged on an outer wall surface of the firing handle member.

[0022] As an alternative to the anastomat, the inner wall surface of the mounting housing is provided with reinforcing ribs.

[0023] Compared with the prior art, the anastomat has the beneficial effects that:

[0024] The anastomat provided by the utility model, set up the firing rack in the mounting housing, one end of the mounting tube is connected with the firing rack, when the nail box assembly is inserted with the other end of the mounting tube, rotating the firing handle assembly can make the firing rack move along the first direction, for firing of the nail box assembly. When the anastomat is not installed the nail box assembly, because the limiting slot is set in the front end of the firing rack, the first stop portion of the limiting piece falls into the limiting slot and abuts against the side wall of the limiting slot, even if the firing handle assembly is held, the firing rack cannot be advanced along the first direction to fire, avoiding misoperation, the operator does not need to pull back the firing rack to reset repeatedly. When the anastomat is installed the nail box assembly, in the process of inserting the nail box assembly with the mounting tube, the nail box assembly will touch the reverse movement of the reset unit along the first direction and push the second stop portion, finally make the first stop portion separate from the limiting slot, so that the firing handle assembly can normally push the firing rack. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the utility model embodiment, the following will briefly introduce the drawings needed to be used in the description of the utility model embodiment, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the contents of the utility model embodiment and these drawings without paying creative labor.

[0026] Figure 1 It is the assembly schematic view of the anastomat in the utility model embodiment;

[0027] Figure 2 It is the assembly schematic view of the anastomat in the utility model embodiment; Figure 1 It is the local enlarged view of A in the utility model embodiment;

[0028] Figure 3 It is the assembly schematic view of the firing rack, the limiting unit, the reset unit, the first extension pusher and the first extension pusher in the utility model embodiment;

[0029] Figure 4 It is the explosion schematic view of the firing rack, the limiting piece, the first extension pusher and the first reset spring in the utility model embodiment;

[0030] Figure 5 It is the structure schematic view of the firing handle assembly in the utility model embodiment.

[0031] REFERENCE SIGNS:

[0032] 100, a clip assembly;

[0033] 1, a mounting housing; 2, a firing rack; 3, a mounting tube; 4, a firing hand component; 5, a limiting unit; 6, a back-off unit; 61, a first extension pusher; 611, a mounting groove; 612, a contact plate; 62, a second extension pusher; 7, a first reset spring; 8, a second reset spring;

[0034] 11, a groove; 12, a support table; 13, a reinforcing rib;

[0035] 21, a limiting groove; 22, a first limiting step portion; 23, a one-way tooth;

[0036] 41, a hook hole; 42, a push block;

[0037] 51, a limiting piece; 511, a first stop portion; 5111, a through hole; 512, a second stop portion; 5121, a second limiting step portion; 5122, a clamping groove; 52, a rotating pin; 53, an elastic piece. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] In the description of the present application, it should be noted that the orientations or position relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or position relationships shown in the drawings, or the orientations or position relationships in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0040] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrangement", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection. For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0041] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0042] In order to prevent the firing hand member from pushing the firing rack forward, and to avoid the operator from pulling the firing rack back to reset, the present embodiment provides an anastomat, which will be described below in combination with Figures 1 to 5 The specific content of the present embodiment is described in detail. It should be noted that the first direction mentioned in the present embodiment is Figure 1 X direction in the above figure, and the X direction is also the direction of the firing rack advancing in the present embodiment.

[0043] The anastomat in the present embodiment includes a mounting shell 1, a firing rack 2, a mounting tube 3, a limiting unit 5, a back-off unit 6 and a firing hand member 4, the mounting shell 1 has a receiving cavity therein, the firing rack 2 is connected with the mounting tube 3 and is arranged in the mounting shell 1, the mounting tube 3 is used for inserting a cartridge assembly 100 at an end away from the firing rack 2, the firing hand member 4 is rotationally connected with the mounting shell 1, and rotating the firing hand member 4 can move the firing rack 2 in the first direction. Specifically, a lower end surface of the firing rack 2 is provided with a plurality of one-way teeth 23, the firing hand member 4 is provided with a pushing block 42, and the pushing block 42 can engage and transmit with the one-way teeth 23 under the action of a torsional spring. The limiting unit 5 includes a limiting piece 51 rotationally connected with the mounting shell 1, a front end of the firing rack 2 is provided with a limiting groove 21, the limiting piece 51 is provided with a first stop portion 511 and a second stop portion 512, and the first stop portion 511 can fall into the limiting groove 21 and abut against a side wall of the limiting groove 21. The back-off unit 6 is movably sleeved on the mounting tube 3, a first end of the back-off unit 6 is used for abutting against the second stop portion 512, a second end of the back-off unit 6 is used for abutting against the cartridge assembly 100, and the back-off unit 6 can move in the reverse direction of the first direction and in turn push the second stop portion 512.

[0044] Briefly, the anastomat provided by the utility model, set the firing rack 2 in the installation shell 1, one end of the installation pipe 3 is connected with the firing rack 2, when the nail box assembly 100 is inserted with the other end of the installation pipe 3, rotating the firing handle assembly 4 can make the firing rack 2 move along the first direction, for the firing of the nail box assembly 100. When the anastomat is not installed the nail box assembly 100, because the limit slot 21 is set in the front end of the firing rack 2, the first stop portion 511 of the limiting piece 51 falls into the limit slot 21 and abuts with the side wall of the limit slot 21, even if the hand holds the firing handle assembly 4, the firing rack 2 cannot advance along the first direction and fire, avoiding misoperation, the operator does not need to pull back the firing rack 2 repeatedly. When the anastomat installs the nail box assembly 100, in the process of inserting the nail box assembly 100 with the installation pipe 3, the nail box assembly 100 will touch the reverse movement of the back-off unit 6 along the first direction and push the second stop portion 512, finally make the first stop portion 511 separate from the limit slot 21, so that the firing handle assembly 4 can normally push the firing rack 2.

[0045] Further, as shown in Figures 2 to 4 The first stop portion 511 is provided with a through hole 5111, the second stop portion 512 is provided with a clamping groove 5122, the inner wall surface of the installation shell 1 is provided with a groove 11, the limiting unit 5 further includes a rotating pin 52 and an elastic piece 53, one end of the rotating pin 52 is movably inserted into the groove 11, and the other end of the rotating pin 52 is sleeved with the through hole 5111. The spiral section of the elastic piece 53 is sleeved on the rotating pin 52, one end of the elastic piece 53 abuts with the clamping groove 5122 of the limiting piece 51, and the other end of the elastic piece 53 abuts with the support table surface 12 of the installation shell 1. The elastic piece 53 can be, but is not limited to, a torsion spring. The first stop portion 511 of the limiting piece 51 has a counterclockwise rotation trend under the action of the elastic piece 53, so that the first stop portion 511 is automatically embedded into the limit slot 21 of the firing rack 2 when the installation pipe 3 is not installed the nail box assembly 100, and the forward movement of the firing rack 2 is prevented. When the nail box assembly 100 is removed, the second stop portion 512 can push the back-off unit 6 to move forward and reset under the action of the elastic piece 53.

[0046] Further, the outer wall surface of the firing rack 2 is provided with a first limiting step portion 22 extending along the first direction, the inner side of the second stop portion 512 is provided with a second limiting step portion 5121, and the second limiting step portion 5121 is stopped at the first limiting step portion 22. By adding the first limiting step portion 22 and the second limiting step portion 5121, the clockwise rotation angle range of the limiting piece 51 can be limited.

[0047] Further, the first end of the back-off unit 6 is provided with a first extended pusher 61, and one end of the first extended pusher 61 is in abutment with the second stop portion 512. By additionally providing the first extended pusher 61, the total length of the back-off unit 6 can be extended, so that the back-off unit 6 can timely contact the second stop portion 512.

[0048] Further, the first extended pusher 61 is provided with a mounting groove 611 with one end penetrating through, the mounting groove 611 extends in the first direction, the first reset spring 7 is arranged in the mounting groove 611, one end of the first reset spring 7 penetrates out of the mounting groove 611 and is in abutment with the second stop portion 512. When the nail magazine assembly 100 retreats the back-off unit 6, the first reset spring 7 is extruded and shortened, and under the action of the first reset spring 7, the back-off unit 6 can be automatically advanced and reset after the nail magazine assembly 100 is removed. Moreover, by additionally providing the first reset spring 7, the impact force of the first extended pusher 61 on the second stop portion 512 can be buffered.

[0049] Further, the first extended pusher 61 is provided with a contact plate 612, and the contact plate 612 is in abutment with the first end of the back-off unit 6. The first extended pusher 61 in the embodiment is of an elongated structure, and by additionally providing the contact plate 612, the contact area of the first extended pusher 61 with the back-off unit 6 can be increased.

[0050] Further, the second end of the back-off unit 6 is provided with a second extended pusher 62, and the second extended pusher 62 is used to be in abutment with the nail magazine assembly 100. By additionally providing the second extended pusher 62, the total length of the back-off unit 6 can be extended, so that the back-off unit 6 can timely contact the nail magazine assembly 100.

[0051] Further, the firing handle assembly 4 is provided with a hook hole 41, and the anastomat further comprises a second reset spring 8, one end of the second reset spring 8 is fixedly connected with the mounting shell 1, and the other end of the second reset spring 8 is connected with the hook hole 41. By additionally providing the second reset spring 8, the firing handle assembly 4 can be automatically reset after being loosened.

[0052] Further, the outer wall surface of the firing handle assembly 4 is provided with an anti-skid structure. The anti-skid structure in the embodiment can be but is not limited to an anti-skid protrusion, an anti-skid groove 11 or an anti-skid pattern, and is not limited here.

[0053] Further, the inner wall surface of the mounting shell 1 is provided with a reinforcing rib 13. By additionally providing the reinforcing rib 13, the overall structural strength of the mounting shell 1 can be improved, and the service life can be prolonged.

[0054] In summary, the loading and unlocking principle of the anastomat in the embodiment is as follows:

[0055] When the cartridge assembly 100 is not loaded, the limiting piece 51 is reversely rotated by the force of the elastic piece 53, and the first stop portion 511 falls in the groove 11, at this time, the firing rack 2 is in the forward movement locking state; when the cartridge assembly 100 is loaded, the cartridge assembly 100 pushes the second extension push piece 62, the back-off unit 6 and the first extension push piece 61 to move backward, so that the limiting piece 51 rotates clockwise around the rotating pin 52, and the first stop portion 511 is separated from the groove 11, at this time, the firing rack 2 is in the forward movement state. The embodiment has the functions of unlocking the displacement of the firing rack 2 when the cartridge assembly 100 is loaded, and reliably locking the firing rack 2 when the cartridge assembly 100 is not loaded.

[0056] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An anastomat comprising a mounting housing (1) having a receiving cavity therein, a firing rack (2) connected with a mounting tube (3) and arranged in the mounting housing (1), the mounting tube (3) having one end distal to the firing rack (2) for inserting a cartridge assembly (100), and a firing handle member (4) rotationally connected with the mounting housing (1), rotation of the firing handle member (4) being capable of moving the firing rack (2) in a first direction, characterized in that, The anastomat further comprises: A limiting unit (5) comprising a limiting piece (51) rotationally connected with the mounting shell (1), a front end of the firing rack (2) is provided with a limiting groove (21), the limiting piece (51) is provided with a first stop portion (511) and a second stop portion (512), the first stop portion (511) can fall into the limiting groove (21) and abut against the side wall of the limiting groove (21); A back-off unit (6) movably sleeved on the mounting pipe (3), a first end of the back-off unit (6) is used for abutting against the second stop portion (512), a second end of the back-off unit (6) is used for abutting against the staple cartridge assembly (100), the back-off unit (6) can move in the reverse direction of the first direction to push the second stop portion (512).

2. The anastomat of claim 1, wherein The first stop portion (511) is provided with a through hole (5111), the second stop portion (512) is provided with a clamping groove (5122), an inner wall surface of the mounting shell (1) is provided with a recess (11), and the limiting unit (5) further comprises: A rotating pin shaft (52), one end of the rotating pin shaft (52) is movably inserted into the recess (11), and the through hole (5111) is sleeved on the other end of the rotating pin shaft (52); An elastic piece (53), a spiral section of the elastic piece (53) is sleeved on the rotating pin shaft (52), one end of the elastic piece (53) abuts against the limiting piece (51), and the other end of the elastic piece (53) abuts against the mounting shell (1).

3. The anastomosis device according to claim 2, wherein An outer wall surface of the firing rack (2) is provided with a first limiting step portion (22) extending in the first direction, an inner side of the second stop portion (512) is provided with a second limiting step portion (5121), and the second limiting step portion (5121) is stopped at the first limiting step portion (22).

4. The anastomat of claim 2 wherein, A first end of the back-off unit (6) is provided with a first extended pushing piece (61), one end of the first extended pushing piece (61) away from the back-off unit (6) abuts against the second stop portion (512).

5. The anastomat of claim 4 wherein, The first extended pushing piece (61) is provided with a mounting groove (611) with one end penetrating through, the mounting groove (611) extends in the first direction, a first return spring (7) is arranged in the mounting groove (611), one end of the first return spring (7) penetrates out of the mounting groove (611) and abuts against the second stop portion (512).

6. The anastomat of claim 4 wherein, The first extended pushing piece (61) is provided with a contact plate (612), and the contact plate (612) abuts against the first end of the back-off unit (6).

7. The anastomat of claim 4 wherein, A second end of the back-off unit (6) is provided with a second extended pushing piece (62), and the second extended pushing piece (62) is used for abutting against the staple cartridge assembly (100).

8. The anastomosis device according to any one of claims 2 to 7, wherein The firing handle assembly (4) is provided with a hook hole (41), and the anastomat further comprises: A second return spring (8), one end of the second return spring (8) is fixedly connected with the mounting shell (1), and the other end of the second return spring (8) is connected with the hook hole (41).

9. The anastomat of claim 8 wherein, The outer wall surface of the firing hand member (4) is provided with an anti-skid structure.

10. The anastomat of claim 8 wherein, The inner wall surface of the mounting shell (1) is provided with reinforcing ribs (13).

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