Sheath, surgical instrument sheath assembly and surgical system

Abstract

The utility model discloses a sheath for a surgical instrument, a surgical instrument sheath assembly and a surgical system. The sheath comprises a sleeve, a first connector and a second connector; the first connector comprises a first locking part; one of the first connector and the second connector is used for being connected with an instrument rod, the other one of the first connector and the second connector is used for being connected with a sleeve, the second connector comprises a second locking part, the second locking part can be switched between a locking position and an unlocking position, in the locking position, the second connector is inserted into the first connector, and the second locking part is locked by the first locking part; and the second locking part at the unlocking position moves towards the inner side relative to the locking position so as to be separated from the first locking part. Therefore, the second locking part of the second connector inserted into the internal mounting hole moves between the locking position and the unlocking position, the second connector can be locked to the first connector, or locking between the first connector and the second connector can be released, and the sheath is convenient to mount and dismount.

Description

Technical Field

[0001] This utility model relates to sheaths, surgical instrument sheath assemblies, and surgical systems. Background Technology

[0002] Surgical robots are high-end medical devices that have gradually emerged and developed alongside the advancement of minimally invasive surgery. They are primarily used to eliminate the adverse effects of large-area trauma caused by surgery on patients through minimally invasive means, thereby reducing patient pain and accelerating postoperative recovery. They can also reduce uncontrollable surgical risks caused by surgeon hand tremors during routine surgery.

[0003] Surgical instruments used in surgical robots are expensive. Generally, surgical instruments need to be designed to be reused after multiple cleaning, sterilization, and disinfection processes. However, the end effectors of surgical instruments have complex structures, and if they become contaminated with solid or liquid contaminants during surgery, the cleaning process becomes significantly more difficult. Therefore, it is necessary to attach a protective sheath to the distal part of the surgical instrument before the surgical procedure to prevent or reduce contamination of the distal portion.

[0004] Existing surgical sheaths consist of a cannula and a sheath connection structure. The cannula is locked to the surgical instrument via the sheath connection structure to prevent the sheath from falling off during surgery. To improve ease of use, the design of the sheath connection structure needs to consider the ease of installation and disassembly. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further described in detail in the detailed embodiments section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above-mentioned technical problems, this utility model provides a sheath for surgical instruments, comprising:

[0007] A cannula is configured to cover the instrument rod of a surgical instrument;

[0008] A first connector, the first connector including a first locking part; and

[0009] The second connector, one of the first connector and the second connector is used to connect the instrument rod, and the other is used to connect the sleeve. The second connector includes a second locking part that can switch between a locked position and an unlocked position. In the locked position, the second connector is inserted into the first connector and the second locking part is locked by the first locking part. In the unlocked position, the second locking part moves inward relative to the locked position to disengage from the first locking part.

[0010] Optionally, the second connector includes a deformable portion, and a second locking portion is located on the deformable portion. The deformable portion undergoes elastic deformation under the action of external force, so that the second locking portion moves inward relative to the locking position to reach the unlocking position.

[0011] Optionally, the second connector includes two spaced notches extending in the axial direction, with a deformable portion defined between the two notches.

[0012] Optionally, the deformable portion further includes an operating portion located on the side of the deformable portion away from the first connector, for receiving external forces.

[0013] Optionally, the first connector includes a first anti-rotation part, and the second connector includes a second anti-rotation part. In the locked position, the second anti-rotation part and the first anti-rotation part limit each other to prevent relative rotation between the first connector and the second connector.

[0014] Optionally, the first connector is used to connect the instrument rod, the second connector is used to connect the sleeve, the first anti-rotation part is located on the far side of the first locking part, and the second anti-rotation part is located on the far side of the second locking part.

[0015] Optionally, the second connector further includes a spacer portion, a second anti-rotation portion located on the spacer portion, the spacer portion being separated from the deformable portion through one of two notches, and the spacer portion further including a reinforcing rib.

[0016] Optionally, at least one of the first locking part and the second locking part has a locking guide surface to guide the second locking part to the locking position where it is locked with the first locking part; and / or

[0017] At least one of the first anti-rotation part and the second anti-rotation part has an anti-rotation guide surface, which guides the second anti-rotation part to a locking position that cooperates with the first anti-rotation part.

[0018] Optionally, the second anti-rotation part is a protrusion, and the first anti-rotation part includes a ring of continuously arranged grooves. In the locked position, the protrusion is fixed to one of the grooves; and / or

[0019] The second locking part is a hook, and the first locking part is a continuous ring of protrusions.

[0020] This utility model also provides a surgical instrument sheath assembly, comprising:

[0021] Surgical instruments, including instrument rods; and

[0022] The aforementioned sheath for surgical instruments is fitted onto the instrument shaft.

[0023] This invention also provides a surgical system, including a surgical robot and the aforementioned surgical instrument sheath assembly, the surgical instrument sheath assembly being configured to be mounted on the end of the robotic arm of the surgical robot.

[0024] According to the present invention, the second locking part of the second connector inserted into the internal mounting hole can move between a locked position and an unlocked position, thereby locking the second connector to the first connector or releasing the lock between the first connector and the second connector, which facilitates the installation and removal of the sheath. Attached Figure Description

[0025] To make the advantages of this invention more readily apparent, the invention briefly described above will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. It should be understood that these drawings depict only typical embodiments of the invention and should not be construed as limiting its scope of protection. The invention is described and explained with additional features and details through the drawings.

[0026] Figure 1 A front view schematic diagram of a surgical instrument sheath assembly using a sheath according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A three-dimensional schematic diagram of the sheath, in which the second locking part is in the locked position;

[0028] Figure 3 for Figure 2 A cross-sectional view of the sheath, in which the second locking part is in the locked position;

[0029] Figure 4 for Figure 2 A three-dimensional schematic diagram of the first connector of the sheath; and

[0030] Figure 5 for Figure 1 A three-dimensional schematic diagram of the second connector of the sheath.

[0031] Explanation of reference numerals in the attached figures

[0032] 100: Instrument box; 101: Instrument pole

[0033] 110: First connector; 111: First locking part

[0034] 112: First anti-rotation part; 113: Internal mounting hole

[0035] 120: Second connector; 121: Second locking part

[0036] 122: Spacing section 123: Notch

[0037] 124: Deformable part; 125: Second anti-rotation part

[0038] 126: Operating Unit 127: Locking Guide Surface

[0039] 128: Reinforcing ribs 129: Main body

[0040] 130: Connector; 140: Sleeve

[0041] 150: Anti-rotation guide surface Detailed Implementation

[0042] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0043] The embodiments of this utility model will be described below with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0044] In this document, ordinal numbers such as “first” and “second” used in this invention are merely identifiers and do not have any other meaning, such as a specific order.

[0045] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0046] Please refer to Figure 1 This utility model provides a surgical instrument sheath assembly, which includes surgical instruments and a sheath for the surgical instruments. The surgical instruments include an instrument housing 100, an instrument rod 101 disposed at the distal end of the instrument housing 100, and an end effector disposed at the distal end of the instrument rod 101. The instrument housing 100 is used to drive the instrument rod 101 to rotate or drive the end effector to move, thereby completing the surgery through the end effector. Optionally, a structure such as a wrist joint is also provided between the end effector and the instrument rod 101.

[0047] The sheath is detachably attached to the surgical instrument. The sheath is fitted onto the lower mounting surface of the surgical instrument and covers at least part of the instrument rod 101, preventing the instrument rod 101 and joint portions (if any) from being contaminated by solid or liquid dirt during surgery, thus reducing the difficulty of cleaning.

[0048] The sheath includes a sleeve 140, a first connector 110, and a second connector 120. The first connector 110 and the second connector 120 jointly connect the sleeve 140 and the instrument rod 101 passing through the sleeve 140. One of the first connector 110 and the second connector 120 is used to connect the instrument rod 101, and the other is used to connect the sleeve 140. The sleeve 140 is configured to cover the instrument rod 101. In this embodiment, the first connector 110 is connected to the instrument rod 101, and the second connector 120 is connected to the sleeve 140.

[0049] like Figures 2 to 4 As shown, the first connector 110 is a sleeve-shaped structure with an internal mounting hole 113. The first connector 110 is provided with a first locking part 111. The second connector 120 is provided with a second locking part 121. The second locking part 121 can switch between a locked position and an unlocked position. When the second locking part 121 is in the locked position, the second connector 120 is inserted into the internal mounting hole 113 of the first connector 110, and the second locking part 121 is locked by the first locking part 111.

[0050] When locked, the second locking part 121 and the first locking part 111 cooperate to prevent the second connector 120 from moving away from the first connector 110 relative to the first connector 110 in the axial direction along the internal mounting hole 113.

[0051] Please refer to Figures 3 to 5 The first locking part 111 is a boss that extends radially inward from the inner wall of the internal mounting hole 113. The second locking part 121 is a hook that extends radially outward and inward from one end of the deformable part 124 near the instrument box 100. When the second locking part 121 is in the locked position, the first locking part 111 and the second locking part 121 hook together. In this way, the structure of the first connector 110 and the second connector 120 is simple.

[0052] Optionally, the first locking part 111 is a continuous ring of bosses. Therefore, when connecting the second connector 120 to the first connector 110, it is not necessary to align the first locking part 111 and the second locking part 121, facilitating the connection. In the unlocked position, the second locking part 121 moves inward towards the center of the second connector 120 relative to the second locking part 121 in the locked position, disengaging from the first locking part 111. At this time, the second connector 120 can exit the first connector 110 through the internal mounting hole 113. It can be understood that the unlocked position of the second locking part 121 is also its mounting position; that is, when it is necessary to install the second connector 120 and the first connector 110, the second locking part 121 is moved to the unlocked / mounted position, the second connector 120 is inserted into the internal mounting hole 113 of the first connector 110, and then the second locking part 121 is moved to the locked position to complete the installation.

[0053] In this embodiment, the second locking part 121 of the second connector 120 inserted into the internal mounting hole 113 moves between the locked position and the unlocked position, which can lock the second connector 120 to the first connector 110, or release the lock between the first connector 110 and the second connector 120, so as to facilitate the installation and removal of the sheath.

[0054] Please continue to refer to this. Figures 3 to 5 At least one of the first locking part 111 and the second locking part 121 has a locking guide surface 127 for guiding the first locking part 111 and the second locking part 121 into alignment. In this embodiment, the second locking part 121 is provided with the locking guide surface 127. The locking guide surface 127 is inclined in the axial direction of the body 129. During the process of moving the second connector 120 relative to the first connector 110 in the axial direction of the body 129 to insert the second connector 120 into the internal mounting hole 113, the locking guide surface 127 and the first locking part 111 cooperate to guide the movement of the second locking part 121, thereby guiding the second locking part 121 to the locked position. This facilitates the connection of the second connector 120 to the first connector 110.

[0055] It is understood that, in embodiments not shown, the first locking part may also be provided with a locking guide surface.

[0056] It is understandable that the first locking part 111 and the second locking part 121 can also be locking features of other structures, as long as they can achieve locking between the two.

[0057] like Figure 3 and Figure 5As shown, the second connector 120 includes a deformable portion 124. When subjected to an external force, the deformable portion 124 bends and undergoes elastic deformation. A second locking portion 121 is located on the deformable portion 124. Thus, when subjected to an external force, the deformable portion 124 drives the second locking portion 121 to move, thereby moving from the locked position to the unlocked position. Therefore, the provision of the deformable portion 124 allows the second locking portion 121 to move from the locked position to the unlocked position, simplifying the structure of the second connector 120. When the external force is removed, the deformable portion 124 resets, driving the second locking portion 121 back to the locked position.

[0058] like Figure 3 and Figure 5 As shown, the second connector 120 includes a body 129. The body 129 has a sleeve-like structure. The first end of the body 129 is fitted over the sleeve 140. The body 129 is coaxially arranged with the internal mounting hole 113. The body 129 is made of a relatively rigid plastic. The second end of the body 129, opposite to the first end, has four notches 123, thereby dividing the second end of the body 129 into four parts. Among them, the portion of the body 129 located between two adjacent notches 123 forms two opposing deformable portions 124, that is, the plastic is deformable by opening in it.

[0059] Please continue to refer to this. Figure 5 The deformable portion 124 has an operating portion 126 on its outer peripheral surface. The operating portion 126 is located at the end of the deformable portion 124 away from the first connector 110. Thus, the aforementioned external force (preferably parallel to the radial direction of the body 129) can be applied to the deformable portion 124 via the operating portion 126 to deform the deformable portion 124. The operating portion 126 can be configured with multiple radially outwardly extending protruding ribs on the outer peripheral surface of the deformable portion 124 for easy hand-held operation.

[0060] like Figures 2 to 5 As shown, the distal opening of the first connector 110 has a first anti-rotation portion 112. The second connector 120 includes a second anti-rotation portion 125. When the second locking portion 121 is in the locked position, the second anti-rotation portion 125 extends into the first anti-rotation portion 112. In this way, the second anti-rotation portion 125 and the first anti-rotation portion 112 mutually limit each other to prevent relative rotation between the first connector 110 and the second connector 120. Therefore, relative rotation between the first connector 110 and the second connector 120 can be avoided during use, thereby preventing torsional deformation of the sleeve 140.

[0061] Optionally, such as Figures 2 to 5As shown, the second anti-rotation portion 125 is constructed as a protrusion extending radially outward from the outer peripheral surface of the second connector 120. The first anti-rotation portion 112 is a plurality of grooves arranged in a continuous ring. The grooves are formed by radially outward recesses in the inner wall surface of the internal mounting hole 113. When the second locking portion 121 is in the locked position, the protrusion extends into one of the grooves to fix the protrusion to one of the grooves. This facilitates the alignment of the second anti-rotation portion 125 with a certain first anti-rotation portion 112, thereby facilitating installation.

[0062] Please refer to Figure 5 At least one of the first anti-rotation portion 112 and the second anti-rotation portion 125 has an anti-rotation guide surface 150. The anti-rotation guide surface 150 is inclined to the axial direction of the body 129. In this embodiment, the second anti-rotation portion 125 is provided with the anti-rotation guide surface 150. During the process of moving the second connector 120 relative to the first connector 110 along the axial direction of the body 129 to insert the second connector 120 into the internal mounting hole 113, the anti-rotation guide surface 150 and the first anti-rotation portion 112 cooperate to guide the movement of the second anti-rotation portion 125, thereby guiding the second anti-rotation portion 125 into the first anti-rotation portion 112. This facilitates the connection of the second connector 120 to the first connector 110.

[0063] It is understood that, in embodiments not shown, the first anti-rotation part may also be provided with an anti-rotation guide surface.

[0064] like Figure 5 As shown, the other part of the body 129 located between two adjacent notches 123 consists of two opposing spacers 122, with a second anti-rotation portion 125 located on the spacers 122. The inner wall surface of the spacers 122 extends radially inward to form reinforcing ribs 128. The reinforcing ribs 128 increase the rigidity of the spacers 122, reducing the possibility of bending deformation under external force and ensuring the anti-rotation function.

[0065] Optionally, such as Figures 3 to 5 As shown, the first anti-rotation part 112 is located on the far side of the first locking part 111, away from the instrument case 100. The second anti-rotation part 125 is located on the far side of the second locking part 121, away from the instrument case 100. Thus, by moving the second connector 120 from a position away from the instrument case 100 toward a position closer to the instrument case 100, it is inserted into the first connector 110, thereby completing the installation of the second connector 120 connected to the first connector 110.

[0066] Please refer to Figures 3 to 5When the second connector 120 needs to be connected to the first connector 110, during the process of inserting the second connector 120 into the internal mounting hole 113, the second locking part 121 and the first locking part 111 interact, causing the deformable part 124 to bend and deform towards the center of the body 129 in the radial direction, so that the second locking part 121 can pass over the first locking part 111. After the second locking part 121 passes over the first locking part 111, the interaction between the second locking part 121 and the first locking part 111 is released, and the deformable part 124 springs back, causing the second locking part 121 to move to the locked position. During the bending deformation of the second locking part 121 over the first locking part 111, the second anti-rotation part 125 enters into a first anti-rotation part 112 directly opposite it. Thus, when the second locking part 121 moves to the locked position, the second anti-rotation part 125 is located in a first anti-rotation part 112 directly opposite it.

[0067] When it is necessary to disengage the second connector 120 from the first connector 110, an external force parallel to the radial direction of the body 129 and pointing towards the center of the body 129 can be applied to the deformable portion 124 to bend and deform, thereby disengaging the second locking portion 121 from the first locking portion 111, allowing the second locking portion 121 to pass over the first locking portion 111. At this time, moving the second connector 120 relative to the first connector 110 along the axial direction of the body 129 allows the second locking portion 121 to move out of the first connector 110, thus disengaging the first connector 110 from the second connector 120. During the bending and deformation of the second locking portion 121 over the first locking portion 111, the second anti-rotation portion 125 moves away from the first anti-rotation portion 112 directly opposite it. Thus, when the first connector 110 disengages from the second connector 120, the second anti-rotation portion 125 is located outside the first connector 110.

[0068] Please refer to Figure 2 and Figure 3 The sheath also includes a connector 130. The connector 130 is connected to the first connector 110. The connector 130 is used to connect the instrument rod 101. Thus, the first connector 110 has a simple structure.

[0069] This utility model also provides a surgical instrument sheath assembly. The surgical instrument sheath assembly includes:

[0070] Surgical instruments, including instrument rod 101; and

[0071] The aforementioned sheath for surgical instruments is fitted onto the instrument rod 101.

[0072] In this embodiment, the surgical instrument sheath assembly includes the aforementioned sheath for surgical instruments. The second locking part 121 of the second connector 120, which is inserted into the internal mounting hole 113, moves between a locked position and an unlocked position, thereby locking the second connector 120 to the first connector 110 or releasing the lock between the first connector 110 and the second connector 120, which facilitates the installation and removal of the sheath.

[0073] This invention also provides a surgical system, including a surgical robot and the aforementioned surgical instrument sheath assembly, the surgical instrument sheath assembly being configured to be mounted on the end of the robotic arm of the surgical robot.

[0074] In this embodiment, the surgical system includes the aforementioned surgical instrument sheath assembly, which includes the aforementioned sheath for surgical instruments. The second locking part 121 of the second connector 120, which is inserted into the internal mounting hole 113, moves between a locked position and an unlocked position, thereby locking the second connector 120 to the first connector 110 or releasing the lock between the first connector 110 and the second connector 120, facilitating the installation and removal of the sheath.

[0075] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0076] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

Claims

1. A sheath, characterized in that, include: A cannula is configured to cover the instrument rod of a surgical instrument; A first connector, the first connector including a first locking part; as well as A second connector, wherein one of the first connector and the second connector is used to connect the instrument rod and the other is used to connect the sleeve, the second connector includes a second locking part that can be switched between a locked position and an unlocked position. In the locked position, the second connector is inserted into the first connector and the second locking part is locked by the first locking part. In the unlocked position, the second locking part moves inward relative to the locked position to disengage from the first locking part.

2. The sheath according to claim 1, characterized in that, The second connector includes a deformable portion, and the second locking portion is located on the deformable portion. The deformable portion undergoes elastic deformation under the action of external force, so that the second locking portion moves inward relative to the locking position to reach the unlocking position.

3. The sheath according to claim 2, characterized in that, The second connector includes two spaced notches extending in the axial direction, with the deformable portion defined between the two notches.

4. The sheath according to claim 2, characterized in that, The deformable part further includes an operating part located on the side of the deformable part away from the first connector, for receiving the external force.

5. The sheath according to claim 3, characterized in that, The first connector includes a first anti-rotation part, and the second connector includes a second anti-rotation part. In the locked position, the second anti-rotation part and the first anti-rotation part limit each other to prevent relative rotation between the first connector and the second connector.

6. The sheath according to claim 5, characterized in that, The first connector is used to connect the instrument rod, the second connector is used to connect the sleeve, the first anti-rotation part is located distal to the first locking part, and the second anti-rotation part is located distal to the second locking part.

7. The sheath according to claim 5, characterized in that, The second connector further includes a spacer portion, the second anti-rotation portion is located on the spacer portion, the spacer portion is separated from the deformable portion through one of the two notches, and the spacer portion further includes a reinforcing rib.

8. The sheath according to claim 5, characterized in that, At least one of the first locking part and the second locking part has a locking guide surface to guide the second locking part to the locking position where it is locked with the first locking part; and / or At least one of the first anti-rotation part and the second anti-rotation part has an anti-rotation guide surface, which guides the second anti-rotation part to the locking position that cooperates with the first anti-rotation part.

9. The sheath according to any one of claims 5 to 8, characterized in that, The second anti-rotation part is a protrusion, and the first anti-rotation part includes a ring of continuously arranged grooves. In the locked position, the protrusion is fixed to one of the grooves; and / or The second locking part is a hook, and the first locking part is a continuous ring of protrusions.

10. A surgical instrument sheath assembly, characterized in that, include: Surgical instruments, the surgical instruments including instrument rods; and The sheath according to any one of claims 1 to 9 is sleeved onto the instrument rod.

11. A surgical system, characterized in that, The invention includes a surgical robot and a surgical instrument sheath assembly according to claim 10, the surgical instrument sheath assembly being configured to be mounted at the end of the robotic arm of the surgical robot.

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