Handle assembly and sleeve assembly for medical instrument and medical instrument

Abstract

The utility model provides a handle assembly and a sleeve assembly for a medical instrument and the medical instrument. A medical device includes: a cannula assembly; the handle assembly is arranged to be detachably connected with the sleeve assembly; the power unit is accommodated in the handle assembly and is connected with the sleeve assembly; the buckle structure is connected with the first connecting part in a clamped mode so that the sleeve assembly and the handle assembly can be detachably connected. According to the medical instrument, the postoperative cleaning and sterilizing difficulty of the cannula assembly can be reduced.

Description

Technical Field

[0001] This utility model relates to a medical device and a handle assembly and a cannula assembly for the medical device. Background Technology

[0002] Medical devices include staplers. Staplers are used to transcribe, remove, and / or anastomose organs, tissues, or blood vessels in vivo, and are suitable for a variety of open or minimally invasive surgeries. Typically, a stapler includes a handle assembly, a cannula assembly, and an actuator assembly. The proximal end of the cannula assembly is releasably connected to the handle assembly, and the actuator assembly is releasably secured to the distal end of the cannula assembly. In minimally invasive surgery, the stapler is inserted into the patient's body through a trocar. Staplers can be laparoscopic staplers, including motorized staplers.

[0003] Existing electric staplers require the operator to attach or detach the cannula assembly from the handle assembly via manipulation. The installation / removal mechanism of the cannula assembly is complex, hindering postoperative cleaning and sterilization. Subsequent reuse could compromise surgical safety, and the removal of the cannula assembly is inconvenient. Furthermore, the installation / removal mechanism is prone to fatigue damage after repeated insertions and removals, affecting the cannula assembly's lifespan and potentially compromising surgical safety. Utility Model Content

[0004] At least one embodiment of the present invention provides a handle assembly for a medical device, the medical device including a cannula assembly and a power unit, the handle assembly including: a first housing portion configured to house the power unit therein, wherein the first housing portion includes a first connecting portion configured to connect to the cannula assembly, the first connecting portion including an unlocking switch configured to unlock the cannula assembly from the handle assembly when subjected to an external force.

[0005] According to an embodiment of the present invention, the first connecting portion further includes a snap-fit ​​component configured to snap into the proximal end of the sleeve assembly to detachably lock the sleeve assembly to the handle assembly.

[0006] According to an embodiment of the present invention, the handle assembly includes a locking member and a locking groove arranged adjacent to each other. The locking groove is configured to receive the proximal end of the sleeve assembly, and the locking member is configured to restrict the movement of the proximal end of the sleeve assembly toward the distal end, so that the sleeve assembly and the handle assembly are in a locked state.

[0007] According to the handle assembly provided in the embodiment of this utility model, the unlocking switch is a press structure that is slidably disposed on the first housing portion. The press structure includes a button and a first elastic member. One end of the first elastic member is fixed inside the first housing portion, and the other end of the first elastic member is connected to the button.

[0008] According to the embodiments of the present invention, the handle assembly provided has a pressing structure that is slidable in the radial direction of the handle assembly; the locking groove is formed by the pressing structure and the locking member, the locking groove is at least partially located in the sliding direction of the pressing structure, and the locking groove is at least partially located near the locking member.

[0009] According to an embodiment of the present invention, the first connecting portion is located at the distal end of the handle assembly and has a connecting cavity. The connecting cavity has an opening at the distal end and a bottom surface at the proximal end. The handle assembly further includes an abutment structure disposed in the connecting cavity. The abutment structure is configured to abut against the proximal end of the sleeve assembly, and the abutment structure protrudes from the bottom surface of the connecting cavity.

[0010] An embodiment of this utility model also provides a cannula assembly for a medical device, the medical device including a handle assembly, the cannula assembly including: a cannula portion; and a second housing portion connected to the proximal end of the cannula portion; the second housing portion has a second connecting portion, the second connecting portion including a snap-fit ​​structure, the snap-fit ​​structure being configured to engage with the handle assembly to lock the cannula assembly to the handle assembly, and to disengage from the handle assembly when subjected to external force, thereby unlocking the cannula assembly from the handle assembly.

[0011] According to the embodiments of the present invention, the sleeve assembly includes a snap-fit ​​structure comprising a snap-fit ​​portion and a second elastic member. The snap-fit ​​portion is configured to snap into the distal end of the handle assembly. One end of the second elastic member is fixed to the second connecting portion, and the other end of the second elastic member is connected to the snap-fit ​​portion.

[0012] According to an embodiment of the present invention, the sleeve assembly includes a snap-fit ​​part and a protrusion, the protrusion protruding radially from the snap-fit ​​part of the sleeve assembly.

[0013] According to an embodiment of the present invention, the protrusion has a top surface and a proximal inclined surface, the inclined surface being configured to be pressed to cause the latching portion to move radially, so that the protrusion slides into the distal end of the handle assembly to form a latching engagement, the top surface being configured to be pressed to cause the latching portion to move radially, so that the protrusion disconnects from the distal end of the handle assembly.

[0014] According to the embodiments of the present invention, the second connecting portion of the sleeve assembly further includes a third elastic member and at least one ejector pin. Each ejector pin is arranged along the axial direction of the sleeve assembly. One end of the third elastic member is fixed to the second connecting portion, and the other end is connected to the distal end of the ejector pin. The ejector pin is configured to abut against the handle assembly when the sleeve assembly and the handle assembly are in a locked state. The third elastic member is configured to push the sleeve assembly toward the distal end when the snap-fit ​​structure is disconnected from the handle assembly.

[0015] An embodiment of this utility model also provides a medical device, comprising: any of the above-described cannula components; any of the above-described handle components, configured to be detachably connected to the cannula components; and a power unit, housed in the handle components and connected to the cannula components; the snap-fit ​​structure engages with the first connecting portion to detachably connect the cannula components and the handle components.

[0016] According to the medical device provided in the embodiment of this utility model, when the unlocking switch is subjected to an external force, the latching structure is subjected to the external force transmitted by the unlocking switch and disconnects from the first connecting part, so that the cannula assembly is unlocked from the handle assembly.

[0017] An embodiment of this utility model also provides a medical device, comprising: any of the above-described cannula assemblies; any of the above-described handle assemblies, configured to be detachably connected to the cannula assemblies; and a power unit, housed in the handle assembly and connected to the cannula assemblies; wherein the protrusion of the buckle portion matches and is housed in the buckle groove, so that the buckle structure engages with the first connecting portion, thereby detachably connecting the cannula assemblies and the handle assembly.

[0018] An embodiment of this utility model also provides a medical device, comprising: any of the above-described cannula assemblies; any of the above-described handle assemblies, configured to be detachably connected to the cannula assemblies; and a power unit, housed in the handle assembly and connected to the cannula assemblies; the protrusion of the latching portion matches and is housed in the latching groove, the top surface of the protrusion abuts against the button, and the distal end of the protrusion abuts against the locking member, so that the latching structure latches against the first connecting portion, and the latching portion is configured such that when the button is subjected to an external force and transmitted to the protrusion, the latching portion moves radially to disengage the protrusion from the locking member, thereby unlocking the cannula assembly and the handle assembly.

[0019] For example, the medical device includes a stapler.

[0020] This utility model relates to a medical device in which a cannula assembly and a handle assembly are detachably connected. The cannula assembly features a snap-fit ​​structure, and the first housing portion of the handle assembly has an unlocking switch. The unlocking switch is set on the disposable first housing portion. The reusable cannula assembly has a simple structure, and sterilization is performed on the cannula assembly after disassembly, thus reducing the difficulty of postoperative cleaning and sterilization. The snap-fit ​​structure and unlocking switch work together to ensure a stable connection between the cannula assembly and the handle assembly, preventing wobbling. Disassembly of the cannula and handle assemblies is convenient; one hand can press the button while the other hand pulls out the cannula assembly, allowing for easy detachment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of this utility model, and are not intended to limit this utility model.

[0022] Figure 1 This is a schematic diagram of a handle assembly and a cannula assembly in a medical device provided for an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of an actuator assembly and a cannula assembly in a medical device provided for an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram (including an exploded view of the snap-fit ​​structure and the unlocking switch) of a handle assembly and a cannula assembly in a medical device provided for an embodiment of the present invention.

[0025] Figure 4 An exploded view of the snap-fit ​​structure of a cannula assembly in a medical device, provided as an embodiment of the present invention.

[0026] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0027] Figure 6 This is a schematic diagram of the snap-fit ​​part in a cannula assembly of a medical device provided as an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram from another perspective of the snap-fit ​​portion in a cannula assembly of a medical device, provided as an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of a cannula assembly (a cannula assembly with a snap-fit ​​structure) in a medical device, provided as an embodiment of the present invention.

[0030] Figure 9An exploded view of an unlocking switch in a handle assembly of a medical device provided as an embodiment of the present invention.

[0031] Figure 10 This is a schematic diagram of a partial structure of a handle assembly (front housing with the unlocking switch assembled) in a medical device, provided as an embodiment of the present invention.

[0032] Figure 11 A schematic diagram (front view - partial sectional view) showing the installation of a handle assembly and a cannula assembly in a medical device according to an embodiment of the present invention.

[0033] Figure 12 A schematic diagram (top view - partial sectional view) of the installation of a handle assembly and a cannula assembly in a medical device according to an embodiment of the present invention.

[0034] Figure 13 A schematic diagram (top view - partial sectional view) of a pop-out structure in a medical device provided for an embodiment of this utility model.

[0035] Figure 14 This is a schematic diagram of the front housing of a medical device provided as an embodiment of the present invention.

[0036] Figure 15 for Figure 11 A magnified view of a portion of the image. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0038] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In embodiments of this invention, the terms "proximal" and "distal" are used in relation to the clinician operating the medical device. "Proximal" refers to the portion of a component or structure closer to the clinician, while "distal" refers to the portion of a component or structure further away from the clinician.

[0040] Typically, a stapler includes an operating handle, a cannula assembly, and an actuator assembly. The proximal end of the cannula assembly is releasably connected to the operating handle, and the distal end is releasably connected to the actuator assembly. To reduce environmental impact and surgical costs, postoperative sterilization is necessary to allow for the reuse of the cannula assembly and operating handle. For the operating handle of an electric stapler, due to the numerous complex electronic components inside, common sterilization methods such as high-temperature steam or ethylene oxide cannot be used. Therefore, a disposable protective sleeve is typically placed over the operating handle to form a handle assembly, and the cannula assembly is then installed on the handle assembly. In typical staplers, the cannula assembly and handle assembly are connected by an installation / removal mechanism, which usually includes a button and a connecting structure located at one end of the cannula assembly. The operator uses the button to install or remove the cannula assembly from the handle assembly. The inventors observed that because the complex installation / removal mechanism is exposed at the end of the cannula assembly, it hinders postoperative cleaning and sterilization of the cannula assembly, potentially affecting surgical safety. Furthermore, when disassembling the cannula assembly, pressing the button requires additional force in different directions to separate the handle assembly and the cannula assembly, making the operation very inconvenient. In addition, after repeated use of the cannula assembly, its installation and disassembly structure is prone to fatigue damage under repeated insertion and removal operations, affecting the service life of the cannula assembly and potentially impacting surgical safety.

[0041] To address at least one of the aforementioned problems, embodiments of the present invention provide a handle assembly and a cannula assembly for a medical device, and a medical device.

[0042] like Figures 1 to 3 , Figures 9 to 15 As shown, at least one embodiment of the present invention provides a handle assembly 1 for a medical device. The medical device includes a cannula assembly 2 and a power unit. The handle assembly 1 includes: a first housing portion 160 configured to house the power unit therein; the first housing portion 160 includes a first connecting portion 1610 configured to connect to the cannula assembly 2; the first connecting portion 1610 includes an unlocking switch 102 configured to unlock the cannula assembly 2 from the handle assembly 1 when subjected to an external force.

[0043] The embodiments of this utility model provide a handle assembly for medical devices, which is provided with an unlocking switch 102. A first connecting part 1610, including the unlocking switch 102, is disposed on a first housing part 160, so that the reusable cannula assembly has a simple structure and is easy to clean and sterilize, while the first housing part 160 is a disposable part that does not require cleaning and sterilization.

[0044] like Figure 3 , Figure 11 and Figure 15 As shown, in the handle assembly 1 provided according to an embodiment of the present invention, the first connecting portion 1610 further includes a snap-fit ​​component 170, which is configured to snap-fit ​​with the proximal end of the sleeve assembly 2 to detachably lock the sleeve assembly 2 and the handle assembly 1. That is, when the sleeve assembly 2 and the handle assembly 1 are connected, the sleeve assembly 2 and the handle assembly 1 are in a locked state, and when the sleeve assembly 2 and the handle assembly 1 are in an unlocked state, the sleeve assembly 2 and the handle assembly 1 can be detached.

[0045] like Figure 3 , Figure 11 and Figure 15 As shown, according to an embodiment of the present invention, the handle assembly 1 includes a locking assembly 170 comprising a locking member 1616 and a locking groove 1617 disposed adjacently. The locking groove 1617 is configured to receive the proximal end of the sleeve assembly 2, and the locking member 1616 is configured to restrict the movement of the proximal end of the sleeve assembly 2 toward the distal end, thereby locking the sleeve assembly 2 and the handle assembly 1. The locking member 1616 may be part of the first housing portion 160 or may be a structure mounted on the first housing portion 160; the embodiments of the present invention do not limit this. Figure 11 Taking the locking member 1616 as an example, which is part of the first housing portion 160.

[0046] like Figure 3 , Figures 9 to 11 ,as well as Figure 15 As shown, in the handle assembly 1 provided according to an embodiment of the present invention, the unlocking switch 102 is a press structure slidably disposed on the first housing portion 160. The press structure includes a button 112 and a first elastic member 122. One end of the first elastic member 122 is fixed inside the first housing portion 160, and the other end of the first elastic member 122 is connected to the button 112. The first elastic member 122 can be used to support the button 112.

[0047] like Figure 3 , Figures 9 to 11 ,as well as Figure 15 As shown, according to an embodiment of the present invention, the handle assembly 1 has a pressing structure that is slidable radially along the handle assembly 1; a locking groove 1617 is formed by the pressing structure and the locking member 1616, the locking groove 1617 being at least partially located in the sliding direction of the pressing structure, and at least partially located near the locking member 1616. The locking groove 1617 being at least partially located in the sliding direction of the pressing structure facilitates contact with the locking portion 211 of the subsequently mentioned locking structure 201 when the pressing structure is pressed. The locking groove 1617 being at least partially located near the locking member 1616 facilitates locking the sleeve assembly 2 onto the handle assembly 1. The radial direction of the handle assembly 1 refers to the direction perpendicular to the axial direction of the handle assembly 1. The axial direction of the handle assembly 1 is parallel to the axial direction of the sleeve assembly 2. Figure 11 As shown, the axis of the handle assembly 1 is parallel to... Figure 11 The horizontal direction is shown. (As shown) Figure 11 As shown, the pressing structure can slide vertically.

[0048] like Figures 1 to 3 , Figures 9 to 15 As shown, in the handle assembly 1 provided according to an embodiment of the present invention, the first connecting portion 1610 is located at the distal end of the handle assembly 1 and has a connecting cavity C4 (as shown in the figure). Figure 14 As shown), the connecting cavity C4 has an opening at the distal end and a bottom surface 1613 at the proximal end (as shown). Figure 14 As shown), the handle assembly 1 also includes an abutment structure 166 disposed in the connecting cavity C4. The abutment structure 166 is configured to abut against the proximal end of the sleeve assembly 2. The abutment structure 166 protrudes from the bottom surface 1613 of the connecting cavity C4 (as shown). Figure 14 (As shown). The abutment structure 166 is used to abut the proximal end of the ejector pin 281 mentioned later, so as to facilitate pushing the sleeve assembly 2 away when unlocking the sleeve assembly 2 from the handle assembly 1.

[0049] like Figures 1 to 8 , Figures 11 to 13As shown, an embodiment of the present invention also provides a cannula assembly 2 for a medical device. The medical device includes a handle assembly 1. The cannula assembly 2 includes: a cannula portion 203; and a second housing portion 202 connected to the proximal end of the cannula portion 203. The second housing portion 202 has a second connecting portion 2020, which includes a snap-fit ​​structure 201. The snap-fit ​​structure 201 is configured to snap into the handle assembly 1 to lock the cannula assembly 2 to the handle assembly 1, and to disengage from the handle assembly 1 when subjected to external force, so as to unlock the cannula assembly 2 from the handle assembly 1.

[0050] The embodiments of this utility model provide a cannula assembly for medical devices, which is provided with a snap-fit ​​structure 201 for engaging with the handle assembly 1. The reusable cannula assembly has a simple structure, and the cannula assembly can be sterilized after disassembly, thereby reducing the difficulty of postoperative cleaning and sterilization of the cannula assembly.

[0051] like Figures 1 to 8 , Figures 11 to 13 As shown, according to an embodiment of the present invention, the sleeve assembly 2 includes a snap-fit ​​structure 201 comprising a snap-fit ​​portion 211 and a second elastic member 221. The snap-fit ​​portion 211 is configured to snap into the distal end of the handle assembly 1. One end of the second elastic member 221 is fixed to the second connecting portion 2020, and the other end of the second elastic member 221 is connected to the snap-fit ​​portion 211. The second elastic member 221 supports the snap-fit ​​portion 211. This embodiment of the present invention uses a snap-fit ​​structure 201 comprising a snap-fit ​​portion 211 and a second elastic member 221 as an example; however, other suitable snap-fit ​​structures 201 may also be used.

[0052] like Figure 6 , Figure 11 and Figure 15 As shown, according to an embodiment of the present invention, the sleeve assembly 2 includes a latching portion 211 comprising a latching body 2110 and a protrusion 216, the protrusion 216 protruding radially from the latching body 2110 of the sleeve assembly 2. The radial direction of the sleeve assembly 2 is perpendicular to the axial direction of the sleeve assembly 2. The axial direction of the sleeve assembly 2 is parallel to... Figure 11 The horizontal direction is shown. The radial direction of sleeve assembly 2 is... Figure 11 The vertical direction is shown.

[0053] like Figure 6 , Figure 11 and Figure 15 As shown, in the sleeve assembly 2 provided according to an embodiment of the present invention, the protrusion 216 has a top surface 2160 (as shown in the figure). Figure 6As shown, the proximal end has a bevel 217, which is configured to be pressed to cause the latching portion 211 to move radially, so that the protrusion 216 slides into the distal end of the handle assembly 1 to form a latch. The top surface 2160 is configured to be pressed to cause the latching portion 211 to move radially, so that the protrusion 216 disengages from the distal end of the handle assembly 1. Disengagement of the protrusion 216 from the distal end of the handle assembly 1 allows the sleeve assembly 2 to separate from the handle assembly 1. Separation of the sleeve assembly 2 from the handle assembly 1 can be done manually or by providing structures that facilitate separation (such as the ejector pin 281 and the abutment structure 166 mentioned later). For example, in the case of manual separation of the sleeve assembly 2 and the handle assembly 1, the operator moves the handle assembly 1 and the sleeve assembly 2 in opposite directions with both hands to separate them. Figure 1 As shown, the operator holds the sleeve assembly 2 with their left hand and the handle assembly 1 with their right hand. After pressing the unlocking switch 102, they can manually separate the sleeve assembly 2 and the handle assembly 1 by applying force to the left and right respectively. The radial movement of the latching part 211 refers to the radial movement of the latching part 211 along the handle assembly 1.

[0054] like Figure 3 , Figures 12 to 13 As shown, according to the embodiment of the present invention, the second connecting part 2020 of the sleeve assembly 2 further includes a third elastic member 283 and at least one ejector pin 281. Each ejector pin 281 is arranged along the axial direction of the sleeve assembly 2. One end of the third elastic member 283 is fixed to the second connecting part 2020, and the other end is connected to the distal end of the ejector pin 281. The ejector pin 281 is configured to abut against the handle assembly 1 when the sleeve assembly 2 and the handle assembly 1 are in a locked state. The third elastic member 283 is configured to push the sleeve assembly 2 toward the distal end when the snap-fit ​​structure 201 is disengaged from the handle assembly 1, thereby automatically separating the sleeve assembly 2 and the handle assembly 1 while unlocking them. Figure 12 and Figure 13 Taking the setting of two ejector pins 281 as an example, setting two ejector pins 281 is beneficial for the symmetrical position design of the ejector pins 281, and also facilitates the ejection of the sleeve assembly 2, making it easier to separate the sleeve assembly 2 and the handle assembly 1.

[0055] like Figures 1 to 15As shown, an embodiment of this utility model also provides a medical device, including: any of the aforementioned cannula assembly 2; any of the aforementioned handle assembly 1, configured to be detachably connected to the cannula assembly 2; and a power unit, housed in the handle assembly 1 and connected to the cannula assembly 2; a snap-fit ​​structure 201 engages with a first connecting portion 1610 to detachably connect the cannula assembly 2 and the handle assembly 1. The handle assembly 1 includes: a first housing portion 160 configured to house the power unit therein, the first housing portion 160 including a first connecting portion 1610 configured to connect to the cannula assembly 2, the first connecting portion 1610 including an unlocking switch 102 configured to unlock the cannula assembly 2 from the handle assembly 1 when subjected to external force. The sleeve assembly 2 includes: a sleeve portion 203; and a second housing portion 202 connected to the proximal end of the sleeve portion 203; the second housing portion 202 has a second connecting portion 2020, the second connecting portion 2020 including a snap-fit ​​structure 201, the snap-fit ​​structure 201 being configured to engage with the handle assembly 1 to lock the sleeve assembly 2 to the handle assembly 1, and to disengage from the handle assembly 1 when subjected to external force, thereby unlocking the sleeve assembly 2 from the handle assembly 1. A power unit is disposed within the handle assembly 1.

[0056] The medical device provided in the embodiments of this utility model has a buckle structure 201 on the cannula assembly 2 and an unlocking switch 102 on the first housing part 160 of the handle assembly 1. The unlocking switch 102 is set on the first housing part 160 for single use. The reusable cannula assembly has a simple structure. After disassembly, the cannula assembly is sterilized, thereby reducing the difficulty of postoperative cleaning and sterilization of the cannula assembly.

[0057] The medical device provided in the embodiments of this utility model has a buckle structure 201 and an unlocking switch 102 that work together to make the cannula assembly 2 and the handle assembly 1 stably connected and not easily shaken.

[0058] The medical device provided in the embodiments of this utility model can realize the installation and disassembly of the cannula assembly 2 and the handle assembly 1 through the snap-fit ​​structure 201 and the unlocking switch 102, thereby realizing the detachable connection between the cannula assembly 2 and the handle assembly 1.

[0059] For example, such as Figure 11 As shown, the latching structure 201 is configured to unlock the sleeve assembly 2 from the handle assembly 1 when the unlocking switch 102 is pressed.

[0060] like Figure 11 As shown, in the medical device provided according to the embodiment of the present invention, when the unlocking switch 102 is subjected to external force, the latching structure 201 is disengaged from the first connecting part 1610 by the external force transmitted by the unlocking switch 102, so that the cannula assembly 2 is unlocked from the handle assembly 1.

[0061] like Figures 1 to 15 As shown, an embodiment of this utility model also provides a medical device, including: any of the aforementioned cannula assembly 2; any of the aforementioned handle assembly 1, configured to be detachably connected to the cannula assembly 2; and a power unit, housed in the handle assembly 1 and connected to the cannula assembly 2; the protrusion 216 of the latching portion 211 matches and is housed in the latching groove 1617, so that the latching structure 201 engages with the first connecting portion 1610, thereby detachably connecting the cannula assembly 2 and the handle assembly 1. For details regarding the protrusion 216 and the latching groove 1617, please refer to the previous description, which will not be repeated here.

[0062] An embodiment of this utility model also provides a medical device, including: any of the above-mentioned cannula assembly 2; any of the above-mentioned handle assembly 1, configured to be detachably connected to the cannula assembly 2; and a power unit, housed in the handle assembly 1 and connected to the cannula assembly 2; the protrusion 216 of the latching part 211 matches and is housed in the latching groove 1617, the top surface of the protrusion 216 abuts against the button 112, and the distal end of the protrusion 216 abuts against the locking member 1616, so that the latching structure 201 is latched with the first connecting part 1610, and the latching part 211 is configured such that when the button 112 is subjected to external force and transmitted to the protrusion 216, the latching part 211 moves radially to disengage the protrusion 216 from the locking member 1616, thereby unlocking the cannula assembly 2 and the handle assembly 1. For details regarding the protrusion 216, the snap-fit ​​groove 1617, and the snap-fit ​​part 211, please refer to the previous description, which will not be repeated here.

[0063] For example, such as Figures 2 to 4 ,as well as Figure 11 As shown, the proximal end of the sleeve assembly 2 includes a second housing portion 202, and a snap-fit ​​structure 201 is disposed on the second housing portion 202.

[0064] For example, such as Figures 3 to 5 As shown, the second housing portion 202 includes a receiving cavity C1 and a first fixing member 241. The first fixing member 241 is located within the receiving cavity C1, and a first elastic member 221 is disposed on the first fixing member 241. At least a portion of the snap-fit ​​portion 211 is received within the receiving cavity C1. The end cap 233 of the second housing portion 202 has a first receiving groove 231, such that the second housing portion 202 has the receiving cavity C1. The second housing portion 202 has a main housing 235, and the main housing 235 and the end cap 233 cooperate to form the receiving cavity C1.

[0065] like Figures 3 to 5 ,as well as Figure 8 As shown, the latching part 211 is mounted on the second housing part 202. The latching part 211 can be latched onto the second housing part 202. The latching part 211 can be pressed down and can return to its initial position under the action of the first elastic member 221.

[0066] Figure 4 Screw 236 is shown. End cap 233 is secured to main housing 235 by screw 236.

[0067] like Figures 3 to 5 As shown, the sleeve assembly 2 includes a sleeve portion 203. A second housing portion 202 is located at the proximal end of the sleeve portion 203.

[0068] For example, such as Figure 7 As shown, the latching part 211 includes a receiving cavity C2, which is configured to receive the first elastic member 221.

[0069] For example, such as Figure 3 , Figure 6 ,as well as Figure 11 As shown, the latching portion 211 includes a protrusion 216, which is configured to lock the sleeve assembly 2 onto the handle assembly 1. Figure 7 and Figure 11 As shown, the protrusion 216 is located at the upper end, and the receiving cavity C2 is located at the lower end.

[0070] For example, such as Figure 3 , Figure 6 ,as well as Figure 11 As shown, the proximal end of the protrusion 216 has a bevel 217, which is configured to slide into the handle assembly 1 when the sleeve assembly 2 is connected to the handle assembly 1.

[0071] For example, such as Figure 3 , Figure 6 ,as well as Figure 11 As shown, the first housing portion 160 includes a front housing 161, and an unlocking switch 102 is disposed on the front housing 161.

[0072] The medical device provided in the embodiments of this utility model, such as Figure 11 As shown, the sleeve assembly 2 is mounted on the handle assembly 1 via the snap-fit ​​structure 201 and the unlocking switch 102. The protrusion 216 can be blocked axially by the front housing 161 (the locking member 1616 is part of the front housing 161) to lock it so that it will not detach from the handle assembly 1.

[0073] For example, such as Figure 3 As shown, the handle assembly 1 also includes a rear housing 162, with the front housing 161 and the rear housing 162 connected together. The front housing 161 is located at the distal end, and the rear housing 162 is located at the proximal end. The front housing 161 and the rear housing 162 are rotatably connected. The front housing 161 and the rear housing 162 can be axially secured by a top pin and can rotate relative to each other.

[0074] For example, such as Figure 3 , Figures 9 to 11As shown, button 112 is mounted on the front housing 161. Button 112 can be snapped onto the front housing 161. Button 112 can be pressed down and can return to its initial position under the action of the second elastic member 122.

[0075] For example, such as Figure 3 , Figure 9 , Figure 11 and Figure 14 As shown, the front housing 161 includes a receiving cavity C3 and a second fixing member 142. The second fixing member 142 is located in the receiving cavity C3, and a second elastic member 122 is disposed on the second fixing member 142. At least a portion of the button 112 is received in the receiving cavity C3.

[0076] The medical device provided in this embodiment of the invention is easy to operate when disassembling the cannula assembly 2 and the handle assembly 1. For example, one hand can press button 112 while the other hand pulls out the cannula assembly 2, making it easy to disassemble the cannula assembly 2 and the handle assembly 1. In contrast, conventional technology requires pressing the button and pulling out the cannula assembly with the same hand, which is inconvenient.

[0077] For example, such as Figure 3 , Figures 12 to 13 As shown, the sleeve assembly 2 includes an ejector structure 280, which includes a pin 281 and a third elastic member 283. The distal end of the pin 281 has a fourth receiving cavity C4, which is configured to receive the third elastic member 283.

[0078] The medical device provided in the embodiments of this utility model may include a pop-out structure 280. After the unlocking action is performed, the pop-out structure 280 allows the cannula assembly 2 to be easily detached from the handle assembly 1 (front housing 161).

[0079] The medical device provided in the embodiment of this utility model has an ejector structure 280 including a pin 281 and a third elastic member 283. With the assistance of the ejector structure 280 (pin 281 and third elastic member 283), the disassembly force of the cannula assembly 2 is reduced, and the cannula assembly 2 can be automatically ejected when the unlocking switch 102 is pressed to apply force to the buckle structure 201.

[0080] like Figure 13 As shown, two symmetrical pop-out structures 280 are provided. The symmetrical design of the pop-out structures 280 on both sides facilitates the smooth connection of the assembled sleeve assembly 2.

[0081] For example, such as Figure 14 As shown, the front housing 161 has an abutment structure 166 configured to abut against the proximal end of the ejector pin 281. For example, as Figure 14 As shown, in order to facilitate the ejection of the ejector pin 281 so that the sleeve assembly 2 is disengaged from the handle assembly 1, the abutment structure 166 is a protruding structure.

[0082] like Figure 13 As shown, before the sleeve assembly 2 is assembled to the handle assembly 1, the ejector pin 281 is disposed in the axial groove. Due to the provision of the third elastic element 283, which provides axial elastic force, the ejector pin 281 can move along the axial direction of the sleeve assembly 2 to the distal or proximal end.

[0083] like Figure 13 As shown, the ejector pin 281 includes a first part 2811 and a second part 2812. The first part 2811 is a proximal portion with a small diameter, and the second part 2812 is a distal portion with a large diameter. That is, the first part 2811 is located at the proximal end, and the second part 2812 is located at the distal end. The diameter of the first part 2811 is smaller than the diameter of the second part 2812. The second part 2812 is hollow (having a fourth receiving cavity C4) and has a built-in third elastic member 283. The first part 2811 is restricted by the second housing portion 202 of the sleeve assembly 2, and the third elastic member 283 is in a pre-compressed state. When the sleeve assembly 2 is assembled to a predetermined position (e.g., ...), Figure 11 As shown), the third elastic element 283 is further compressed. That is, after the sleeve assembly 2 and the handle assembly 1 are assembled in place, due to the abutment structure 166 (as shown), the third elastic element 283 is further compressed. Figure 14 (As shown) is a convex structure. Figure 13 The thimble 281 shown will move a distance to the left (towards the far end).

[0084] The medical device provided in the embodiments of this utility model, the operation of assembling and locking the cannula assembly 2 is as follows.

[0085] like Figure 3 , Figure 4 and Figure 11 As shown, the first elastic element 221 in the sleeve assembly 2 is supported below the snap-fit ​​part 211. During the assembly process, the snap-fit ​​part 211 will slide downward along the direction of the slide groove (accommodating cavity C3) under the influence of external force, while compressing the first elastic element 221 below it.

[0086] like Figure 11 As shown, after the sleeve assembly 2 is assembled to the predetermined position, the latching part 211 is not subjected to external force. Under the elastic force of the first elastic element 221, the latching part 211 slides upward and returns to the initial position (as shown). Figure 11 (as shown in the image); at this time, the edge portion 1616 of the front outer casing 161 blocks the latching portion 211, preventing the latching portion 211 from moving backward (far end), thus forming the function of locking the sleeve assembly 2. Figure 11 In the locked state shown, the far side of the protrusion 216 of the latch 211 is the edge portion 1616 of the front housing 161, and the upper side of the protrusion 216 is the button 112.

[0087] During the assembly of the sleeve assembly, the ejector pin 281 pushes against the front housing 161 (see...). Figure 14 On the abutting structure 166 of the ejector pin, the ejector pin 281 slides along the direction of the slide groove under force, while compressing the third elastic element 283 on the front side.

[0088] The operation of unlocking the cannula assembly of the medical device provided in the embodiments of this utility model is as follows.

[0089] After pressing button 112 to the set unlock position, the latch 211 is simultaneously pressed into the unlock position by button 112. Figure 11 When the top surface of the protrusion 216 of the latching part 211 is flush with the inner surface of the edge portion 1616 of the front housing 161, the second elastic member 122 deforms under force and supports the button 112. At this time, the ejector pin 281 pushes the sleeve assembly 2 out of the locking area (towards the distal end) under the axial elastic force of the third elastic member 283. The inclined surface 217 of the latching part 211 slides out of the edge portion 1616 of the front housing 161 (similar to the movable tongue structure of a lock). When the force of pressing the button 112 is released, the button 112 slides upward under the action of the second elastic member 122 and returns to its original position. Thus, the sleeve assembly 2 is unlocked from the handle assembly 1.

[0090] For example, the first elastic element 221, the second elastic element 122, and the third elastic element 283 can all be springs, but are not limited to this.

[0091] For example, the first fixing member 241 and the second fixing member 142 can both be fixing posts, but are not limited to this.

[0092] like Figures 1 to 2 As shown, the medical device includes a handle assembly 1, a cannula assembly 2, and an actuator assembly 3. The cannula assembly 2 is detachably mounted to the handle assembly 1. The actuator assembly 3 is detachably mounted to the cannula assembly 2. A cavity formed by the first housing portion 160 of the handle assembly 1 is used to house a power unit. The power unit is reusable. The first housing portion 160 is a disposable component.

[0093] Figure 2 Actuator assembly 3 is shown. Actuator assembly 3 is detachably connected to sleeve assembly 2. Actuator assembly 3 includes a remote actuator 303.

[0094] For example, in some embodiments, the medical device may be a stapler, such as a laparoscopic stapler; in this case, the distal actuator 303 includes a jaw assembly and a cutting assembly, the jaw assembly including a first jaw and a second jaw that can be controlled to open or close. For example, one of the first jaw and the second jaw includes a staple cartridge assembly, and the other includes an anvil capable of deforming the staples ejected from the staple cartridge assembly. For example, in other embodiments, the medical device may also be other suitable medical devices such as a clamp applicator; the embodiments of this utility model do not specifically limit the type of medical device.

[0095] The cutting and anastomosis process of the actuator assembly: The cutting assembly moves from the proximal end of the instrument to the distal end. The upper edge of the cutting assembly contacts the first jaw (including the anvil), and the lower edge pivots the second jaw (including the staple cartridge assembly) along its inclined surface until it is parallel to the first jaw. The first and second jaws close; this process is called tissue positioning. The cutting assembly continues to move distally, pushing the staple pusher slider in the second jaw distally to push the staples of the staple cartridge assembly upward through the tissue. When the staples contact the guide pit of the first jaw, they deform into a B-shape, completing the suturing action. The cutting edge of the cutting assembly severs the sutured tissue. The cutting assembly returns to its initial position, completing one cutting and anastomosis operation.

[0096] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A handle assembly for a medical device, characterized in that, The medical device includes a cannula assembly and a power unit, and the handle assembly includes: The first housing portion is configured to house the power unit therein. The first housing portion includes a first connecting portion configured to connect with the sleeve assembly. The first connecting portion includes an unlocking switch configured to unlock the sleeve assembly from the handle assembly when subjected to an external force.

2. The handle assembly according to claim 1, characterized in that, The first connection portion further includes a snap-fit ​​assembly configured to snap into the proximal end of the sleeve assembly to detachably lock the sleeve assembly to the handle assembly.

3. The handle assembly according to claim 2, characterized in that, The locking assembly includes a locking member and a locking groove arranged adjacent to each other. The locking groove is configured to receive the proximal end of the sleeve assembly, and the locking member is configured to restrict the movement of the proximal end of the sleeve assembly toward the distal end, so that the sleeve assembly and the handle assembly are in a locked state.

4. The handle assembly according to claim 3, characterized in that, The unlocking switch is a press structure that is slidably disposed on the first housing portion. The press structure includes a button and a first elastic element. One end of the first elastic element is fixed inside the first housing portion, and the other end of the first elastic element is connected to the button.

5. The handle assembly according to claim 4, characterized in that, The pressing structure is slidable radially along the handle assembly; the locking groove is formed by the pressing structure and the locking member, the locking groove is at least partially located in the sliding direction of the pressing structure, and the locking groove is at least partially located on the proximal side of the locking member.

6. The handle assembly according to any one of claims 1-5, characterized in that, The first connecting portion is located at the distal end of the handle assembly and has a connecting cavity having an opening at the distal end and a bottom surface at the proximal end. The handle assembly further includes an abutment structure disposed in the connecting cavity, the abutment structure being configured to abut against the proximal end of the sleeve assembly, the abutment structure protruding from the bottom surface of the connecting cavity.

7. A cannula assembly for a medical device, characterized in that, The medical device includes a handle assembly, and the cannula assembly includes: Sleeve section; and The second housing portion is connected to the proximal end of the sleeve portion. The second housing portion has a second connecting portion, which includes a snap-fit ​​structure configured to engage with the handle assembly to lock the sleeve assembly to the handle assembly, and to disengage from the handle assembly when subjected to external force, thereby unlocking the sleeve assembly from the handle assembly.

8. The sleeve assembly according to claim 7, characterized in that, The latching structure includes a latching part and a second elastic member. The latching part is configured to engage with the distal end of the handle assembly. One end of the second elastic member is fixed to the second connecting part, and the other end of the second elastic member is connected to the latching part.

9. The sleeve assembly according to claim 8, characterized in that, The latching part includes a latching body and a protrusion, the protrusion protruding radially from the latching body of the sleeve assembly.

10. The sleeve assembly according to claim 9, characterized in that, The protrusion has a top surface and a proximal slope, the slope being configured to be pressed to cause the latching portion to move radially so that the protrusion slides into the distal end of the handle assembly to form a latching engagement, the top surface being configured to be pressed to cause the latching portion to move radially so that the protrusion disengages from the distal end of the handle assembly.

11. The sleeve assembly according to any one of claims 7-10, characterized in that, The second connecting portion further includes a third elastic element and at least one ejector pin, each ejector pin being arranged along the axial direction of the sleeve assembly. One end of the third elastic element is fixed to the second connecting portion, and the other end is connected to the distal end of the ejector pin. The ejector pin is configured to abut against the handle assembly when the sleeve assembly and the handle assembly are in a locked state. The third elastic element is configured to push the sleeve assembly toward the distal end when the snap-fit ​​structure is disengaged from the handle assembly.

12. A medical device, characterized in that, include: The sleeve assembly according to any one of claims 7-11; The handle assembly according to any one of claims 1-6 is configured to be detachably connected to the sleeve assembly; as well as A power unit is housed in the handle assembly and connected to the sleeve assembly; The snap-fit ​​structure engages with the first connecting part to allow the sleeve assembly and the handle assembly to be detachably connected.

13. The medical device according to claim 12, characterized in that, When the unlocking switch is subjected to an external force, the latching structure is disengaged from the first connecting part by the external force transmitted by the unlocking switch, thereby unlocking the sleeve assembly from the handle assembly.

14. A medical device, characterized in that, include: The sleeve assembly according to any one of claims 9-10; The handle assembly according to any one of claims 3-5 is configured to be detachably connected to the sleeve assembly; as well as A power unit is housed in the handle assembly and connected to the sleeve assembly; The protruding part of the buckle portion matches and is accommodated in the snap-fit ​​groove, so that the buckle structure snaps into the first connecting part, thereby making the sleeve assembly and the handle assembly detachably connected.

15. A medical device, characterized in that, include: The sleeve assembly according to any one of claims 9-10; The handle assembly according to any one of claims 4-5 is configured to be detachably connected to the sleeve assembly; as well as A power unit is housed in the handle assembly and connected to the sleeve assembly; Wherein, the protruding part of the buckle portion matches and is accommodated in the snap-fit ​​groove, the top surface of the protruding part abuts against the button, and the distal end of the protruding part abuts against the locking member, so that the buckle structure snaps into the first connecting part, and the buckle portion is configured as follows: When the button is subjected to an external force and transmitted to the protrusion, the latching part moves radially, causing the protrusion to break the contact with the locking member, thereby unlocking the sleeve assembly and the handle assembly.

16. The medical device according to any one of claims 12-15, characterized in that, The medical device includes a stapler.

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