Surgical instrument

Abstract

The utility model provides a surgical instrument which comprises a rod assembly, a connecting component and a locking mechanism, and the connecting component is connected with the rod assembly and can rotate around a rotating axis relative to the rod assembly. The locking mechanism comprises a locking piece, an intermittent meshing gear set, a damper and an abutting piece, the intermittent meshing gear set comprises a first row of teeth arranged on the connecting component and a second row of teeth arranged on the locking piece, and the damper is at least used for providing damping force for the locking piece so that the second row of teeth can be meshed with the first row of teeth; the abutting piece can abut against the locking piece so that the second row of teeth can be kept engaged with the first row of teeth, or the abutting piece can be separated from the locking piece so that the connecting component can rotate relative to the rod assembly, and therefore the locking piece overcomes the damping force so that the position of the second row of teeth relative to the first row of teeth can be adjusted. The surgical instrument solves the problem that in the prior art, stability is low when the angle between the connecting component and the rod assembly is locked.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical instrument manufacturing field especially, relate to a surgical instrument. BACKGROUND

[0002] Staplers are often used in endoscopic surgical procedures to replace traditional open surgical instruments. The use of staplers often requires a smaller incision, which can reduce post-operative recovery time and complications. Therefore, a series of staplers suitable for accurately placing the end effector through the sleeve of the trocar at the desired surgical site have been developed, and the end effector can enter the human body to capture soft tissue and cut.

[0003] In patent CN101327141B, including shaft, end effector, joint and locking member, the joint includes first joint member and second joint member, one of the first joint member and the second joint member is installed on the end effector, the other of the first joint member and the second joint member is installed on the shaft, the first joint member can move relative to the second joint member around the rotation axis, the first joint member includes: a first part with a first outer circumference, the first part extends between the rotation axis and the first outer circumference; a second part with a second outer circumference, the second part extends between the rotation axis and the second outer circumference. The first part and the second part form a tooth and a groove defined between the teeth.

[0004] The locking member can include an end portion and a shaft portion, wherein the end portion can include a groove configured to receive the teeth of the locking member in a close or even interference fit relationship.

[0005] The end effector can swing a certain angle, and can be locked by the locking member after swinging a certain angle to prevent it from swinging; specifically, when the end effector needs to swing a certain angle, first pull the knob to the proximal end, drive the shaft portion to move to the proximal end, so that the groove is separated from the tooth, then drive the centering shaft on both sides to move through the rotation knob mechanism, the centering shaft extrudes the centering surface to make the first joint member pivot, and then the end effector swings to the desired position, when the end effector swings to the desired position, release the knob, the shaft portion moves to the distal end under the action of the spring, and then the groove and the tooth are re-engaged to realize locking.

[0006] However, in this patent, the teeth are formed on the joint member, and the end portion of the locking member only engages with one tooth of the gear, and the stability of the locking is low. UTILITY MODEL CONTENTS

[0007] The utility model discloses a surgical instrument to solve the problem of poor locking stability of the surgical instrument in the prior art.

[0008] In order to realize the above-mentioned purpose of the utility model, one embodiment of the utility model provides a surgical instrument, which comprises:

[0009] A rod assembly;

[0010] A connecting member connected with the rod assembly and rotatable relative to the rod assembly about a rotation axis;

[0011] A locking mechanism, which comprises a locking piece, an intermittent meshing gear set, a damper and an abutting piece, the intermittent meshing gear set comprises a first row of teeth arranged on the connecting member and a second row of teeth arranged on the locking piece, the damper is used at least for providing a damping force to the locking piece to make the second row of teeth mesh with the first row of teeth, and the abutting piece can abut against the locking piece to make the second row of teeth maintain the state of meshing with the first row of teeth or separate from the locking piece to make the connecting member rotatable relative to the rod assembly, so that the locking piece overcomes the damping force to adjust the position of the second row of teeth relative to the first row of teeth.

[0012] As a further improvement of the embodiment of the utility model, the locking piece is provided with an abutting inclined surface, and when the abutting piece abuts against the abutting inclined surface, a pressure can be applied to the locking piece towards the connecting member to make the second row of teeth maintain the state of meshing with the first row of teeth.

[0013] As a further improvement of the embodiment of the utility model, the connecting member has a mounting surface intersecting with the rotation axis, the first row of teeth is arranged on the mounting surface, the locking piece has a locking surface arranged towards the mounting surface, and the second row of teeth is arranged on the locking surface.

[0014] As a further improvement of the embodiment of the utility model, the locking piece comprises a locking block and a mounting column, the locking block has two end faces arranged oppositely, one of the end faces forms the locking surface, the mounting column is arranged on the other end face, and the damper is sleeved on the mounting column and connected with the locking block.

[0015] As a further improvement of the embodiment of the utility model, the rod assembly comprises a mounting bracket, the mounting bracket comprises a mounting column, the connecting member is sleeved on the mounting column, the central axis of the mounting column is arranged as the rotation axis, the mounting bracket is provided with a mounting groove for accommodating the mounting column and the damping piece, and the damping piece is connected with the inner wall of the mounting groove.

[0016] As a further improvement of the embodiment of the utility model, wherein, the locking piece includes at least one guide post, the at least one guide post is arranged on the end face of the locking block with the mounting post, the mounting bracket is equipped with a guide slot matched with the guide post corresponding to each guide post.

[0017] As a further improvement of the embodiment of the utility model, wherein, the abutting piece is slidably arranged on the mounting bracket, the locking mechanism further includes an elastic member, the elastic member is sleeved on the abutting piece and is configured to abut the abutting piece and the locking piece by elastic force.

[0018] As a further improvement of the embodiment of the utility model, wherein, further include two oppositely arranged thimbles, the thimbles are arranged along the axial direction parallel to the rod assembly, and the two thimbles can respectively abut the connecting member.

[0019] As a further improvement of the embodiment of the utility model, wherein, the thimbles are sleeved with damping members, and the damping members can provide damping force for the thimbles in the axial direction of the thimbles to abut the connecting member.

[0020] As a further improvement of the embodiment of the utility model, wherein, further include a driving unit, the driving unit is in transmission cooperation with the abutting piece to separate the abutting piece and the locking piece.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] When the damper provides damping force to the locking piece to make the second row of teeth mesh with the first row of teeth, the abutting piece abuts the locking piece, so that the second row of teeth can maintain the meshing state with the first row of teeth, and the meshing of the second row of teeth and the first row of teeth can achieve stable locking effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A partial structure schematic view of a surgical instrument is provided for an embodiment of the utility model;

[0024] Figure 2 A schematic view of the explosion structure is provided for Figure 1 ;

[0025] Figure 3 A schematic view of the explosion structure is provided for Figure 2 ;

[0026] Figure 4 A partial structure schematic view of a surgical instrument in the locking state of the locking mechanism is provided for an embodiment of the utility model;

[0027] Figure 5 A schematic view of the explosion structure is provided for Figure 4A cross-sectional structure schematic view of the device;

[0028] Figure 6 A partial structure schematic view of the locking mechanism in the unlocked state of the surgical instrument is provided in an embodiment of the utility model.

[0029] The above description of drawings includes the following reference signs:

[0030] 1, rod assembly;

[0031] 11, mounting support;

[0032] 111, mounting column;

[0033] 112, mounting groove;

[0034] 113, guide groove;

[0035] 3, connecting member;

[0036] 31, mounting surface;

[0037] 32, centering surface;

[0038] 33, mounting hole;

[0039] 4, locking mechanism;

[0040] 41, locking member;

[0041] 411, locking block;

[0042] 4111, abutting inclined surface;

[0043] 4112, locking surface;

[0044] 412, mounting column;

[0045] 413, guide column;

[0046] 42, intermittent meshing gear set;

[0047] 421, first row of teeth;

[0048] 422, second row of teeth;

[0049] 43, damper;

[0050] 44, abutting member;

[0051] 441, shaft portion;

[0052] 442, end portion;

[0053] 45, elastic member;

[0054] 5, thimble;

[0055] 51. Damping components. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0058] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0059] To address the problem of poor locking stability in existing surgical instruments, this invention provides a surgical instrument.

[0060] The present invention will now be described in further detail with reference to the accompanying drawings.

[0061] like Figures 1-6 As shown, the surgical instrument provided by this utility model includes a rod assembly 1, a connecting member 3, and a locking mechanism 4.

[0062] The connecting member 3 is connected to the rod assembly 1 and can rotate relative to the rod assembly 1 about a rotation axis; the locking mechanism 4 includes a locking member 41, an intermittent meshing gear set 42, a damper 43, and an abutment member 44. The intermittent meshing gear set 42 includes a first row of teeth 421 disposed on the connecting member 3 and a second row of teeth 422 disposed on the locking member 41. The damper 43 is at least used to provide damping force to the locking member 41 so that the second row of teeth 422 meshes with the first row of teeth 421. The abutment member 44 can abut against the locking member 41 so that the second row of teeth 422 remains in a state of meshing with the first row of teeth 421, or separate from the locking member 41 so that the connecting member 3 can rotate relative to the rod assembly 1, thereby allowing the locking member 41 to overcome the damping force and adjust the position of the second row of teeth 422 relative to the first row of teeth 421.

[0063] When the damper 43 provides damping force to the locking member 41 so that the second row of teeth 422 engages with the first row of teeth 421, the abutment member 44 abuts against the locking member 41, thereby enabling the second row of teeth 422 to maintain engagement with the first row of teeth 421. The engagement of the second row of teeth 422 with the first row of teeth 421 can achieve a stable locking effect.

[0064] In the present embodiment, the abutting member 44 can be separated from the locking member 41 to enable the connecting member 3 to rotate relative to the rod assembly 1, so that the locking member 41 overcomes the damping force to adjust the position of the second row of teeth 422 relative to the first row of teeth 421, that is, the angle formed between the connecting member 3 and the rod assembly 1 can be adjusted.

[0065] Preferably, in the present embodiment, no matter how the position of the second row of teeth 422 relative to the first row of teeth 421 is adjusted, the first row of teeth 421 and the second row of teeth 422 are arranged such that when they are engaged, at least four teeth in the first row of teeth 421 are engaged with at least four teeth in the second row of teeth.

[0066] In the present embodiment, optionally, the first row of teeth 421 and the second row of teeth 422 can both adopt a straight bevel gear design. The feature of this design is that each tooth has a straight bevel, so that when the connecting member 3 rotates relative to the rod assembly 1 and the locking member 41 needs to overcome the damping force to adjust the relative position of the second row of teeth 422 and the first row of teeth 421, the straight bevel gear can smoothly separate to ensure that the two can easily disengage from the engaged state. Such a design not only improves the flexibility of adjustment, but also helps to reduce wear that may occur during adjustment, thereby prolonging the service life of the surgical instrument.

[0067] It should be emphasized that in the present utility model, the distal end and the proximal end are relative to the operator, the end closer to the operator is the proximal end, and the end farther from the operator, i.e. the end closer to the surgical site, is the distal end. The axial direction refers to the axial direction of the rod assembly 1. In combination with Figure 1 the figure, the left side is the distal end and the right side is the proximal end. Figure 1

[0068] It should be noted that the surgical instrument in the present utility model usually further comprises an end effector, which is connected to the rod assembly 1 through the connecting member 3 and can move relative to the rod assembly 1, and the connecting member 3 can rotate relative to the rod assembly 1 about the rotation axis. Usually, the end effector and the connecting member 3 are connected through a pin shaft, and preferably, the axis of the pin shaft is orthogonal to the rotation axis.

[0069] Further, the end effector in the present utility model can include a staple seat and a cartridge unit, and the cartridge unit specifically includes a staple cartridge and a cartridge base, and the staple cartridge is detachably arranged on the cartridge base. The staple cartridge has a staple cartridge channel, wherein the staple cartridge can be configured to detachably store staples in the staple cartridge. At least one of the cartridge base and the staple seat can be pivoted relative to the other about the pin shaft to achieve opening and closing of the end effector.

[0070] ​In at least one embodiment, the cartridge is positioned between an anvil and a cartridge mount. The anvil can be pivotally coupled to the cartridge channel and can be pivoted between an open position and a closed position by an end effector closure system. To deploy staples from the cartridge, the surgical instrument can further include a staple driver configured to traverse the cartridge and a firing driver for advancing the staple driver within the cartridge. In various embodiments, the anvil can be configured to deform at least a portion of the staples during deployment of the staples from the cartridge.

[0071] It can be appreciated that the end effector moves relative to the shaft assembly 1, particularly in that the end effector itself opens and closes, and that the end effector is brought along by the connecting member 3 and rotates through an angle relative to the shaft assembly 1.

[0072] Further, referring to Figures 2-3 , the locking member 41 is designed with an abutting inclined surface 4111, when the abutting member 44 is in abutting contact with the abutting inclined surface 4111, a pushing force towards the connecting member 3 will be generated on the locking member 41, ensuring that the second row of teeth 422 is in close engagement with the first row of teeth 421, thereby maintaining the stability of the locked state.

[0073] Next, referring to Figure 3 , the connecting member 3 is provided with an installation surface 31 intersecting with the rotation axis, and the first row of teeth 421 is arranged on the installation surface 31. Correspondingly, the locking member 41 is provided with a locking surface 4112 facing the installation surface 31, and the second row of teeth 422 is ingeniously arranged on the locking surface 4112, which ensures that the first row of teeth 421 and the second row of teeth 422 can be accurately aligned and effectively engaged.

[0074] Preferably, the intersection angle between the installation surface 31 and the rotation axis is set to be a right angle, which ensures the stability of the structure and the accuracy of the engagement.

[0075] Next, referring to Figure 5 , the locking member 41 mainly includes a locking block 411 and an installation column 412, the locking block 411 has two oppositely arranged end surfaces, one of which constitutes the locking surface 4112 for arranging the second row of teeth 422; the other end surface is fixed with the installation column 412, and the damper 43 is ingeniously sleeved on the installation column 412 and connected with the locking block 411, so as to realize the stable damping effect of the locking member 41.

[0076] Further, referring to Figures 2-3 , the shaft assembly 1 is mainly composed of an installation support 11, wherein the installation support 11 includes an installation column 111. The connecting member 3 is sleeved on the installation column 111 through the installation hole 33 thereon, realizing the connection with the shaft assembly 1.

[0077] In particular, the middle axis of the mounting column 111 is defined as the rotation axis, so that the connecting member 3 can rotate around this axis. In addition, the mounting bracket 11 is also designed with a mounting groove 112, which is specially used to accommodate the mounting column 412 of the locking member 41 and the damper 43, which is fixed to the inner wall of the mounting groove 112 by a suitable connecting manner, ensuring the stability and reliability of the damper 43 during operation.

[0078] Further, referring to Figure 3 , the locking member 41 is also equipped with at least one guide column 413, which is arranged on the end face of the locking block 411 where the mounting column 412 is mounted. Correspondingly, the mounting bracket 11 is designed with a guide groove 113 matched with each guide column 413 to ensure the stability and accuracy of the locking member 41 during movement.

[0079] Further, referring to Figure 4 , the abutting member 44 is designed to be slidable on the mounting bracket 11, and in order to ensure that the abutting member 44 can effectively abut against the locking member 41, the locking mechanism 4 further includes an elastic member 45. The elastic member 45 is sleeved on the abutting member 44, and uses its elastic force to push the abutting member 44 to abut against the locking member 41. Thus, the second row of teeth 422 can be maintained in meshing state with the first row of teeth 421.

[0080] Preferably, the abutting member 44 includes an axis portion 441 and an end portion 442 connected with each other, and the axis portion 441 is parallel to the axial direction of the rod assembly 1, ensuring the stability of the abutting member 44 during movement. The end portion 442 is arranged on the distal end of the axis portion 441, which makes the abutting member 44 more accurately act on the inclined surface. One end of the elastic member 45 is connected with the end portion 442, and the other end can abut against the mounting bracket 11, thereby generating an elastic force. The elastic force can push the abutting member 44 to abut against the locking member 41.

[0081] Further, referring to Figures 4-5 , the surgical instrument is additionally provided with two oppositely arranged ejector pins 5, which are arranged in a direction parallel to the axial direction of the rod assembly 1. The two ejector pins 5 can respectively abut against the connecting member 3, thereby stably maintaining the angle formed by the connecting member 3 relative to the rod assembly 1.

[0082] Further referring to Figures 4-5 , the two ejector pins 5 are arranged on the mounting bracket 11, and the two ejector pins 5 are respectively arranged on the two sides of the connecting member 3. Figure 4 , and Figure 5The locking piece 41 is abutted by the abutting piece 44 to be in the locking state, that is, the second row of teeth 422 is kept in the meshing state with the first row of teeth 421, and the presence of the ejector pin 5 further ensures the stability and angle accuracy of the whole structure, and improves the reliability and safety of the surgical instrument during use.

[0083] Next, turning to Figure 6 , Figure 6 The structure schematic diagram when the position of the second row of teeth 422 relative to the first row of teeth 421 is adjusted is shown, and in this process, the two ejector pins 5 can abut the connecting member 3 respectively to play a certain stabilizing role when the angle of the connecting member 3 and the rod assembly 1 is adjusted.

[0084] Further, a damping piece 51 is sleeved on each ejector pin 5. The damping piece 51 can provide a stable damping force for the ejector pin 5 in the axial direction of the ejector pin 5, so as to ensure that the ejector pin 5 can abut the connecting member 3 tightly, thereby playing a damping role in the process of adjusting the angle and enhancing the stability of the surgical instrument.

[0085] Specifically, the damping piece 51 is connected between the ejector pin 5 and the rod assembly 1 and can provide a damping force for the ejector pin 5 in the axial direction of the ejector pin 5. The connecting member 3 has a centering surface 32 facing the ejector pin 5, and the damping force can ensure that the ejector pin 5 can abut the centering surface 32 tightly.

[0086] Further, the surgical instrument also comprises a driving unit which is in transmission cooperation with the abutting piece 44. Through the action of the driving unit, the abutting piece 44 and the locking piece 41 can be effectively separated, so as to facilitate the adjustment of the angle of the connecting member 3 relative to the rod assembly 1 or other necessary operations.

[0087] It should be noted that in the embodiment of the utility model, preferably, the damper 43, the elastic piece 45 and the damping piece 51 can all be provided as springs.

[0088] In summary, the embodiment of the utility model realizes the following technical effects:

[0089] When the damper 43 provides a damping force to the locking piece 41 to make the second row of teeth 422 mesh with the first row of teeth 421, the abutting piece 44 abuts the locking piece 41, so that the second row of teeth 422 can be kept in the meshing state with the first row of teeth 421, and the meshing of the second row of teeth 422 and the first row of teeth 421 can achieve a stable locking effect.

[0090] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0091] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0092] It should be noted that the terms "first", "second", and the like, used in the specification and in the claims of the present application are intended to distinguish analogous objects, and are not necessarily intended to describe a particular sequential or chronological order. It is to be understood that the data thus designated can be interchanged, where appropriate, so that the embodiments of the present application described herein can be carried out in sequences other than those illustrated or described herein.

[0093] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A surgical instrument, characterized in that, include: Rod assembly; A connecting member, connected to the rod assembly and rotatable relative to the rod assembly about a rotation axis; The locking mechanism includes a locking member, an intermittent meshing gear set, a damper, and an abutment. The intermittent meshing gear set includes a first row of teeth disposed on the connecting member and a second row of teeth disposed on the locking member. The damper is at least used to provide a damping force to the locking member so that the second row of teeth meshes with the first row of teeth. The abutment can abut against the locking member to keep the second row of teeth in a state of meshing with the first row of teeth, or separate from the locking member so that the connecting member can rotate relative to the rod assembly, thereby allowing the locking member to overcome the damping force to adjust the position of the second row of teeth relative to the first row of teeth.

2. The surgical instrument according to claim 1, characterized in that, The locking member is provided with an abutting inclined surface. When the abutting member abuts against the abutting inclined surface, pressure can be applied to the locking member toward the connecting member so that the second row of teeth maintains a state of engagement with the first row of teeth.

3. The surgical instrument according to claim 1, characterized in that, The connecting member has a mounting surface intersecting the rotation axis, the first row of teeth is disposed on the mounting surface, the locking member has a locking surface facing the mounting surface, and the second row of teeth is disposed on the locking surface.

4. The surgical instrument according to claim 3, characterized in that, The locking element includes a locking block and a mounting post. The locking block has two end faces facing away from each other, one of which forms the locking surface. The mounting post is disposed on the other end face, and the damper is sleeved on the mounting post and connected to the locking block.

5. The surgical instrument according to claim 4, characterized in that, The rod assembly includes a mounting bracket, the mounting bracket includes a mounting column, the connecting member is sleeved on the mounting column, the central axis of the mounting column is set as the rotation axis, the mounting bracket is provided with a mounting groove for accommodating the mounting column and the damping member, and the damping member is connected to the inner wall of the mounting groove.

6. The surgical instrument according to claim 5, characterized in that, The locking element includes at least one guide post, which is disposed on the end face of the locking block on which the mounting post is mounted, and the mounting bracket is provided with a guide groove that mates with each guide post.

7. The surgical instrument according to claim 5, characterized in that, The abutment is slidably disposed on the mounting bracket, and the locking mechanism further includes an elastic element, which is sleeved on the abutment and configured to allow the abutment to abut against the locking element through elastic force.

8. The surgical instrument according to claim 1, characterized in that, It also includes two opposing ejector pins, which are arranged along the axial direction parallel to the rod assembly, and the two ejector pins can respectively abut against the connecting member.

9. The surgical instrument according to claim 8, characterized in that, A damping element is fitted on the ejector pin, which provides damping force in the axial direction of the ejector pin to make the ejector pin abut against the connecting member.

10. The surgical instrument according to claim 1, characterized in that, It also includes a drive unit, which is driven in conjunction with the abutment to separate the abutment from the locking member.

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