Shell assembly, handle assembly and medical instrument

Abstract

A housing assembly, a handle assembly and a medical device are provided. The housing assembly includes: a housing body; the cover plate assembly is arranged at the far end of the shell main body; at least part of the sleeve connecting structure is located between the far end of the shell body and the cover plate assembly, and the sleeve connecting structure is configured to be capable of rotating in the circumferential direction. The sleeve connecting structure is arranged on the shell assembly, so that the postoperative cleaning and sterilizing difficulty of the sleeve assembly is reduced.

Description

Technical Field

[0001] This utility model relates to at least one housing assembly, a handle assembly, and a medical device. Background Technology

[0002] Anastomosing devices can be 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. To reduce environmental impact and lower usage costs, it is necessary to reuse some components of the electric anastomosing device. For example, in many cases, electric anastomosing devices include a reusable power handle assembly, a cannula assembly, and a disposable end effector. The end effector is selectively connected to the cannula and power handle assembly before use, and then disconnected from them after use so that some components can be disposed of or, in some cases, sterilized for reuse.

[0003] In typical electric staplers, the cannula assembly is connected to the handle. The cannula assembly has a connecting structure, and the lead screw on the cannula assembly is connected to the motor drive rod on the handle via the connecting structure. However, having the connecting structure on the cannula assembly makes the cannula assembly complex, which is not conducive to postoperative cleaning and sterilization of the cannula assembly. It may also lead to problems such as the lead screw and drive rod not being properly connected, for example, the drive rod and lead screw may misalign, causing the internal transmission of the electric stapler to fail. Utility Model Content

[0004] At least one embodiment of this utility model relates to a housing assembly, a handle assembly, and a medical device.

[0005] At least one embodiment of the present invention provides a housing assembly for a medical device, comprising: a housing body; a cover plate assembly disposed at the distal end of the housing body; and a sleeve connection structure disposed at the distal end of the housing body, wherein at least a portion of the sleeve connection structure is located between the housing body and the cover plate assembly, and the sleeve connection structure is configured to be circumferentially rotatable.

[0006] For example, in at least one embodiment of the present invention, the sleeve connection structure includes a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves located within the sleeve core and respectively connected to both ends of the spring. The two sliding sleeves are respectively radially stopped relative to the sleeve core and can slide axially along the sleeve connection structure.

[0007] For example, in at least one embodiment of the present invention, the shell assembly has a first through hole at the distal end of the shell body, the cover plate assembly has a cover plate body, the cover plate body has a second through hole, the distal end and proximal end of the sleeve core are respectively connected to the first through hole and the second through hole, and the sleeve core is rotatable in the circumferential direction.

[0008] For example, in the housing assembly provided in at least one embodiment of the present invention, at least one of the two sliding sleeves has a first sleeve portion and a second sleeve portion connected to each other, the outer diameter of the first sleeve portion is smaller than the outer diameter of the at least part of the second sleeve portion, the first sleeve portion is further away from the spring than the second sleeve portion, and the second sleeve portion has a cavity for accommodating the end of the spring.

[0009] For example, in the housing assembly provided in at least one embodiment of the present invention, one of the two sliding sleeves is located at the proximal end of the sleeve core, and is configured to include a first receiving hole at the proximal end; the other of the two sliding sleeves is located at the distal end of the sleeve core, and is configured to include a second receiving hole at the distal end.

[0010] For example, in at least one embodiment of the present invention, the sleeve core has a blocking portion at at least one end, the blocking portion being configured to block the second sleeve portion of the sliding sleeve disposed within the sleeve core in the axial direction, thereby restricting the second sleeve portion from moving outward from the sleeve core.

[0011] For example, in the housing assembly provided in at least one embodiment of the present invention, each of the two sliding sleeves and one of the sleeve cores has a radial protrusion, and the other of the two sliding sleeves and the sleeve core has a groove, the protrusion being located within the groove and matching the groove, such that the sliding sleeve is radially and circumferentially stopped relative to the sleeve core and is axially slidable.

[0012] For example, in at least one embodiment of the present invention, the housing assembly further includes a first gasket and / or a second gasket, wherein the first gasket is located between the housing body and the sleeve core, and the second gasket is located between the cover plate assembly and the sleeve core.

[0013] For example, in at least one embodiment of the present invention, the cover plate assembly and the shell body are fixedly connected to fix the sleeve core.

[0014] At least one embodiment of the present invention provides a handle assembly for a medical device, including a power unit and a housing assembly provided in the embodiment of the present invention, wherein the housing body includes a first housing and a second housing, the first housing and the second housing are rotatably connected, and the power unit is disposed in a cavity formed by the first housing and the second housing.

[0015] For example, in at least one embodiment of the present invention, the power unit includes a drive rod, the drive rod having a matching shape with the proximal end of the sleeve connection structure, and being configured to rotate circumferentially about the axis of the sleeve connection structure and connected to the sleeve connection structure.

[0016] For example, in at least one embodiment of the present invention, the sleeve connection structure includes a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves located within the sleeve core and respectively connected to both ends of the spring. The two sliding sleeves are radially stopped relative to the sleeve core and can slide axially along the sleeve connection structure. The drive rod and the end of the near-end of the sliding sleeve have matching non-circular cross-sectional shapes. The sliding sleeve is configured such that when the power unit is initially installed in the housing body, the end of the sliding sleeve abuts against the drive rod; when the drive rod rotates to a specific circumferential position, the sliding sleeve slides axially under the pressure of the spring and is sleeved on the drive rod, so that the sleeve connection structure is circumferentially stopped relative to the drive rod.

[0017] At least one embodiment of the present invention provides a medical device, including a handle assembly provided in the embodiments of the present invention; and a cannula assembly configured to be detachably connected to the handle assembly.

[0018] For example, in a medical device provided by at least one embodiment of the present invention, the cannula assembly includes a lead screw, the distal end of which has a matching non-circular cross-sectional shape with the sleeve connection structure and is configured to be connected to the sleeve connection structure.

[0019] For example, in at least one embodiment of the medical device provided by this utility model, the sleeve connection structure includes a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves located within the sleeve core and respectively connected to both ends of the spring. The two sliding sleeves are radially stopped relative to the sleeve core and are axially slidable along the sleeve connection structure. The lead screw and the end of the proximal sliding sleeve have matching non-circular cross-sectional shapes. The power unit further includes a controller, which is configured to perform at least one of the following steps:

[0020] S1: Drive the drive rod to rotate in a first direction to a specific circumferential position to connect with the sliding sleeve at the proximal end, and cause the sleeve connection structure to stop circumferentially relative to the drive rod;

[0021] S2: Drive the drive rod to rotate in the second direction, thereby causing the sleeve connection structure to rotate in the second direction, so that the lead screw is connected to the sliding sleeve at the far end, and the sleeve connection structure is stopped circumferentially relative to the lead screw.

[0022] For example, in at least one embodiment of the medical device provided by this utility model, an actuator assembly is further included. The actuator assembly includes a jaw assembly and a cutting assembly. The actuator assembly is detachably connected to the distal end of the cannula assembly. The distal end of the lead screw is connected to the cutting assembly. When the drive rod, the lead screw, and the sleeve connection structure are connected and relatively circumferentially stopped, the controller is further configured to perform at least one of the following steps:

[0023] S3: Drive the drive rod to rotate in the first direction to drive the lead screw to rotate in the first direction, thereby pushing the cutting assembly toward the distal end of the medical device to close the jaw assembly and / or cut tissue;

[0024] S4: Drive the drive rod to rotate in the second direction to drive the lead screw to rotate in the second direction, thereby pulling the cutting assembly toward the proximal end of the medical device to open the jaw assembly.

[0025] The outer shell assembly and handle assembly including the outer shell assembly provided by this utility model have a sleeve connection structure located at the distal end of the shell body, and at least part of the sleeve connection structure is located between the shell body and the cover plate assembly. The cover plate assembly forms a sterile barrier for the power unit of the handle assembly. The outer shell assembly of this utility model is convenient to use, has efficient transmission, and can be used as a disposable component without the need for cleaning and sterilization. The sleeve assembly only needs to be equipped with a lead screw for connection and transmission with the outer shell assembly / handle assembly, making the sleeve assembly structure simple. After use, the sleeve assembly can be disassembled from the outer shell assembly including the sleeve connection structure, reducing the difficulty of postoperative cleaning and sterilization of the sleeve assembly, improving the safety of surgery, and increasing the service life of reusable sleeve assemblies. The sleeve connection structure of the outer shell assembly provided by this utility model ensures smooth connection between the lead screw of the sleeve assembly and the drive rod of the handle assembly, preventing the drive rod and lead screw from deviating and providing effective power transmission. The medical device provided by this utility model includes multiple transmission components (lead screw and drive rod), which are respectively installed on the disassembly and connection components of the medical device. The multiple transmission components are connected and transmitted through a sleeve connection structure, which facilitates the disassembly and connection between multiple components and makes it easy to reuse. Attached Figure Description

[0026] 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 involve some embodiments of this utility model, and are not intended to limit this utility model.

[0027] Figure 1 An exploded view of a medical device containing the housing assembly provided in an embodiment of the present invention.

[0028] Figure 2This is an assembly diagram of a medical device containing the housing assembly provided in this embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of a cannula assembly and an actuator assembly in a medical device provided for an embodiment of the present invention.

[0030] Figure 4 An exploded view of the sleeve connection structure in the housing assembly provided in this embodiment of the utility model.

[0031] Figure 5 An assembly diagram of the sleeve connection structure in the outer shell assembly provided in this embodiment of the utility model.

[0032] Figure 6 A schematic diagram of a sleeve connection structure with a portion removed from the outer shell assembly provided in an embodiment of this utility model.

[0033] Figure 7 This is a schematic diagram showing the spring in the housing assembly provided in the embodiment of the present invention in a first compressed state (pre-assembled).

[0034] Figure 8 This is a schematic diagram showing the spring in the housing assembly provided in the embodiment of the present invention in a second compressed state (assembled in place).

[0035] Figure 9 A partial schematic diagram of the sliding sleeve in the housing assembly provided in this embodiment of the present utility model.

[0036] Figure 10 This is a partial schematic diagram of the shaft that mates with the connecting hole of the sliding sleeve in a medical device provided in an embodiment of the present invention.

[0037] Figure 11 This is a partial schematic diagram of the cannula assembly in a medical device provided in an embodiment of the present invention.

[0038] Figure 12 This is a partial schematic diagram of the front shell of a medical device provided in an embodiment of the present invention.

[0039] Figure 13 This is a partial schematic diagram from another perspective of the front housing of a medical device provided in an embodiment of the present invention.

[0040] Figure 14 A schematic diagram of the front shell of a medical device provided in an embodiment of this utility model.

[0041] Figure 15 This is a schematic diagram from another perspective of the front housing of a medical device provided in an embodiment of the present invention.

[0042] Figure 16A schematic diagram of the shaft and receiving hole in the self-calibration action of the medical device provided in this embodiment of the utility model. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] A housing assembly for a medical device includes a housing body; a distal cover assembly disposed on the housing body; and a sleeve connection structure, at least a portion of the sleeve connection structure being located between the distal end of the housing body and the cover assembly.

[0047] A handle assembly for a medical device includes a power unit and a housing assembly provided in this embodiment of the invention. The housing body includes a first housing and a second housing, the first housing and the second housing being rotatably connected, and the power unit being disposed in a cavity formed by the first housing and the second housing.

[0048] A medical device includes a handle assembly provided in this embodiment of the invention; and a cannula assembly provided in this embodiment of the invention, wherein the cannula assembly is configured to be detachably connected to the handle assembly.

[0049] like Figures 1 to 8 As shown, an embodiment of the present invention provides a housing assembly 121 for a medical device, comprising: a housing body, a cover plate assembly CV disposed at the distal end of the housing body, and a sleeve connection structure SV. The sleeve connection structure SV is located at the distal end of the housing body, at least a portion of the sleeve connection structure SV is located between the housing body and the cover plate assembly CV, and the sleeve connection structure SV is configured to be circumferentially rotatable.

[0050] In one embodiment, the shell body includes a first shell 101 and a second shell 12. For example, the first shell 101 is the distal shell, and the second shell 102 is the proximal shell. A cover assembly CV is disposed on the side of the first shell 101 near the second shell 12. The first end of the first shell 101 (i.e. Figure 1 The upper end of the first housing 12 is rotatably connected to the first end of the second housing 12. For example, Figure 1 The connecting part is shown as a locating pin 14. The first housing 101 and the second housing 12 form a cavity for accommodating the power unit 13 when they are docked. Furthermore, the opening and closing method of the housing assembly is not necessarily a proximal-distal opening and closing (i.e., the housing assembly is composed of a proximal assembly and a distal assembly). The opening and closing method of the housing assembly can also be left-right opening and closing, up-down opening and closing, and other feasible two-sided opening and closing. That is, the first housing can also be one of the left-side assembly, right-side assembly, upper assembly, lower assembly, and single-sided assembly.

[0051] The housing assembly 121 is disposable, sterile, and requires no postoperative cleaning or sterilization. The power unit 13 includes electronic components such as a circuit board, battery, and motor, which are relatively expensive to manufacture. Reusing the power unit 13 can reduce costs. However, because it contains electronic components, it cannot be sterilized using common methods such as ethylene oxide / high-temperature steam. Therefore, the sterile housing assembly 121 is used to seal the power unit 13, preventing bacteria from the repeatedly used power unit 13 from being transferred out of the housing assembly 121.

[0052] The sterile outer shell assembly 121 provided in the embodiments of this utility model has a sleeve connection structure SV disposed on the outer shell assembly, for example, disposed between the first shell 101 and the cover plate assembly CV. The cover plate assembly CV is a sterile plate that seals the power unit 13 inside the outer shell assembly 121. The cover plate assembly CV forms a sterile barrier for the power element 13.

[0053] For example, such as Figure 1 , Figures 4 to 9As shown, in the housing assembly 121, the sleeve connection structure SV includes a sleeve core 106, a spring 104 disposed within the sleeve core 106, and two sliding sleeves 103 and 105 located within the sleeve core 106 and respectively disposed on both sides of the spring 104. The two sliding sleeves 103 and 105 are respectively stopped radially and circumferentially relative to the sleeve core 106 and are axially slidable. Here, axial refers to the extending direction of the sleeve core 106. The sliding sleeve 103 is located at the distal end of the sleeve core 106, and the sliding sleeve 105 is located at the proximal end of the sleeve core 106.

[0054] For example, such as Figure 1 As shown, in the housing assembly 121, the first housing 101 has a first through hole K1 for receiving the distal end of the sleeve core 106, and the cover plate assembly CV has a cover plate body 108, which has a second through hole K2 for receiving the proximal end of the sleeve core 106. The distal end and proximal end of the sleeve core 106 communicate with the first through hole K1 and the second through hole K2, respectively, and the sleeve core 106 is rotatable.

[0055] For example, such as Figure 7 and Figure 8 As shown, in the housing assembly 121, each of the two sliding sleeves 103 and 105 has a first sleeve portion P1 and a second sleeve portion P2. The outer diameter of the first sleeve portion P1 is smaller than at least a portion of the outer diameter of the second sleeve portion P2. The first sleeve portion P1 is further away from the spring 104 than the second sleeve portion P2. The second sleeve portion P2 has a cavity P20 for receiving the end of the spring 104. Of course, the outer diameters of the first sleeve portion P1 and the second sleeve portion P2 in the sliding sleeve 103 can also be the same.

[0056] For example, such as Figure 1 , Figure 7 and Figure 8 As shown, in the housing assembly 121, one of the two sliding sleeves 103 and 105 is located at the distal end of the sleeve core 106, and the other of the two sliding sleeves 103 and 105 is engaged at the proximal end of the sleeve core 106. This embodiment of the invention uses the example of sliding sleeve 103 located at the distal end of the sleeve core 106 and sliding sleeve 105 engaged at the proximal end of the sleeve core 106.

[0057] For example, in the housing assembly 121, the sleeve core 106 has a blocking portion at at least one end. Figures 4 to 8 As shown, the proximal end of the sleeve core 106 has a blocking portion B, which is configured to axially block the second sleeve portion P2 of the sliding sleeve (i.e., the sliding sleeve 105) disposed at the rear end (proximal end) of the sleeve core 106. This causes the larger diameter second sleeve portion P2 to be blocked within the sleeve core 106. Figure 8 As shown, a portion of the first sleeve portion P1 of the sliding sleeve 105 can extend out of the sleeve core 106. Figure 8As shown, a portion of the first sleeve portion P1 of the sliding sleeve 103 may also extend out of the sleeve core 106. For example, the second sleeve portion P2 of the sliding sleeve 103 may be blocked by the structure of the first housing 101. In one embodiment, the blocking portion of the sleeve core 106, for example, is a part of the structure extending from the sleeve core or the housing assembly 121, or a component provided on the sleeve core and / or the housing assembly, to restrict the movement of the two second sleeve portions P2 outward from the sleeve core 106.

[0058] For example, such as Figure 1 , Figures 4 to 8 As shown, in the housing assembly 121, a retaining ring R is provided outside the sleeve core 106, and the retaining ring R is configured to define the position of the sleeve core 106. The retaining ring R is used to define the position of the sleeve core 106 between the first housing 101 and the cover plate assembly CV.

[0059] For example, such as Figure 4 , Figure 6 , Figure 9 As shown, in the housing assembly 121, each of the two sliding sleeves 103 and 105 and one of the sleeve cores 106 has a protrusion PR, and the other sliding sleeve and sleeve core 106 has a groove GR. The protrusion PR is located within the groove GR so that the sliding sleeve is radially and circumferentially stopped relative to the sleeve core 106, and can slide axially along the sleeve connection structure SV. An embodiment of this invention uses two opposing protrusions PR on the sliding sleeve 103, two opposing protrusions PR on the sliding sleeve 105, and two opposing grooves GR on the sleeve core 106 as examples. However, the number of protrusions PR on the sliding sleeve and the number of grooves GR in the sleeve core 106 can be determined as needed and are not limited to those shown in the figures. Of course, grooves GR can also be provided on the sliding sleeve, and protrusions PR on the sleeve core 106. Similarly, embodiments of this invention do not limit the number of grooves GR on the sliding sleeve and the number of protrusions PR on the sleeve core 106. Figure 4 , Figure 7 , Figure 9 As shown, the protrusions PR of the sliding sleeves 103 and 105 are located on the second sleeve portion P2, such that the outer diameter of the first sleeve portion P1 is smaller than at least part of the outer diameter of the second sleeve portion P2. The protrusions PR cooperate with the aforementioned blocking portion B to restrict the second sleeve portion P2 from moving outward toward the sleeve core 106.

[0060] For example, such as Figure 1 , Figure 4 , Figure 7 and Figure 8 As shown, in the housing assembly 121, the two sliding sleeves 103 and 105 have the same structure. Therefore, the sliding sleeves 103 and 105 are replaceable, which facilitates the manufacturing of the sliding sleeves 103 and 105.

[0061] For example, such as Figure 1 As shown, the housing assembly 121 further includes a first gasket 102 located between the first housing 101 and the sleeve core 106. The first gasket 102 restricts axial movement of the second sleeve portion P2 of the sliding sleeve 103. The housing assembly 121 also includes a second gasket 107 located between the cover plate assembly CV and the sleeve core 106. The second gasket 107 restricts axial movement of the sleeve core 106.

[0062] For example, such as Figure 1 As shown, in the housing assembly 121, the cover plate assembly CV and the first housing 101 are fixedly connected to secure the sleeve core 106. Figure 1 As shown, the cover plate body 108 is fixed to the first housing 101 by fasteners 109. For example, the fastener 109 is a screw, and correspondingly, a threaded hole is provided on the first housing 101.

[0063] like Figure 1 As shown, an embodiment of the present invention also provides a handle assembly 123 for a medical device, including a power unit 13 and any of the aforementioned housing assemblies 121, wherein the power unit 13 is disposed in the cavity formed by the first housing 101 and the second housing 12.

[0064] For example, refer to Figure 1 , Figure 7 and Figure 8 In the handle assembly 123, the power unit 13 further includes a drive rod 131, the distal end of which is configured to be circumferentially rotatable about the axis of the sleeve connection structure SV and connected to the sleeve connection structure SV. The drive rod 131 of the power unit 13 is connected to the sliding sleeve 105 (e.g., at least in the cases of contact and circumferential stop). For example, the drive rod 131 of the power unit 13 is a motor output shaft.

[0065] An embodiment of this utility model also provides a medical device, including the above-described handle assembly 123.

[0066] For example, such as Figure 1 , Figure 2 , Figure 7 , Figure 8 and Figure 11 As shown, the medical device also includes a cannula assembly 15, which includes a lead screw 152. The proximal end of the lead screw 152 is configured to be circumferentially rotatable about the axis of the sleeve connection structure SV and connected to the sleeve connection structure SV. When the cannula assembly 15 and the handle assembly 123 are connected, as... Figure 7 and Figure 8 As shown, the lead screw 152 is connected to the sliding sleeve 103 (for example, including at least two cases: contact between the two and circumferential stop). Figure 1 and Figure 2 The distal end of the lead screw 152 is shown. Figure 7 , Figure 8 and Figure 11 The proximal end of the lead screw 152 is shown.

[0067] Figure 10 Axis A is shown. Axis A is the axis of a triangular prism. In embodiments of this invention, both the proximal end of the lead screw 152 and the distal end of the drive 131 can be... Figure 10 The structure of axis A is shown. Correspondingly, as... Figure 9 As shown, sliding sleeves 103 and 105 each have a receiving hole K0. Figure 12 As shown, the sliding sleeve 103 has a receiving hole K20, as Figure 13 As shown, the sliding sleeve 105 has a receiving hole K10. The shape of the receiving hole K10 is adapted to the shape of the shaft A. Figure 9 As shown, the cross-section of the receiving hole K0 is triangular. Of course, the embodiments of this utility model are not limited to this; the shaft A and the receiving hole K0 can also adopt other suitable shapes, such as quadrilaterals, pentagons, hexagons, octagons, etc. In one embodiment, the ends of the drive rod 131 and the sliding sleeve 105 have matching non-circular cross-sectional shapes, and the ends of the lead screw 152 and the sliding sleeve 103 have matching non-circular cross-sectional shapes, allowing the drive rod 131 to abut against the end of the sliding sleeve 105, and the lead screw 152 to abut against the end of the sliding sleeve 103.

[0068] The medical device provided in the embodiment of this utility model has a proximal end of the sleeve connection structure SV connected to the drive rod 131 of the power unit 13, and a distal end of the sleeve connection structure SV connected to the lead screw 152 of the cannula assembly 15. At the same time, the rotational kinetic energy of the power unit 13 can be transmitted to the cannula assembly 15.

[0069] For example, such as Figure 3 As shown, the medical device also includes an actuator assembly 18, which is connected to the distal end of the cannula assembly 15. The actuator assembly 18 is detachably connected to the cannula assembly 15. Before use, the actuator assembly 18 is selectively connected to the distal end of the cannula assembly 15, which is connected to the handle assembly. After use, the actuator assembly 18 is disconnected from the reusable cannula assembly 15 and the handle assembly 123 for disposal or, in some cases, sterilization for reuse.

[0070] like Figure 1 , Figures 12 to 15 As shown, the first housing 101 is provided with a button protective cover 1017. (As indicated...) Figure 1As shown, the power unit 13 has a button 137, and a button protective sleeve 1017 is fitted onto the button 137. The button 137 is electrically connected to the power unit 13. The button can control the rotation of the drive rod 131 on the power unit 13, which in turn drives the lead screw 152 connected to the sleeve connection structure SV to rotate, thereby controlling the firing and retraction of the cutting component in the actuator assembly 18.

[0071] Figure 12 and Figure 14 Pin 1016 is shown. Figure 11 Hole 153 accommodating pin 1016 is shown.

[0072] Figure 13 and Figure 15 Pin 1018 is also shown; pin 1018 is used to connect to power unit 13. (See diagram below.) Figures 1 to 3 As shown, the medical device includes a handle assembly 123, a cannula assembly 15, and an actuator assembly 18. The cannula assembly 15 is detachably mounted to the handle assembly 123. The actuator assembly 18 is detachably mounted to the cannula assembly 15. The actuator assembly 18 includes a cutting component (not shown). When the actuator assembly 18 and the cannula assembly 15 are connected, the proximal end of the cutting component of the actuator assembly 18 is connected to the distal end of the lead screw 152.

[0073] The following details the connection process of the drive rod 131 of the power unit body assembly 13, the lead screw 152 of the sleeve assembly 15, and the sleeve connection structure SV. Figure 1 As shown, the sleeve core 106 of the sleeve connection structure SV contains two identical sliding sleeves (sliding sleeve 103 and sliding sleeve 105), with a spring 104 (in a compressed state) between the two sliding sleeves. A receiving hole K0 (e.g., a hole with an inner triangular cross-section, such as...) is located between sliding sleeves 103 and 105. Figure 9 As shown), the distal end of the drive rod 131 and the proximal end of the lead screw 152 on the power unit 13 are designed to mate with the receiving hole K0. For example, their cross-sections are designed to form an external triangular mating feature (e.g., Figure 10 (As shown).

[0074] like Figure 1 and Figure 8 As shown, the outer shell assembly 121 is first assembled with the power unit 13. After the first shell 101 and the second shell 12 are closed, the distal end of the drive rod 131 of the power unit 13 will abut against the sliding sleeve 105 (that is, the end of the sliding sleeve 105 abuts against the drive rod 131) and compress the spring 104 in the sleeve core 106 to slide to the distal end. After the outer shell assembly 121 and the sleeve assembly 15 are assembled, the proximal end of the lead screw 152 of the sleeve assembly 15 will abut against the sliding sleeve 103 (that is, the end of the sliding sleeve 103 abuts against the lead screw 152) and compress the spring 104 in the sleeve core 106 to slide to the proximal end.

[0075] At this time, the drive rod 131 of the power unit 13 and the lead screw 152 of the sleeve assembly 15 are respectively pressed against the ends of the two sliding sleeves 103 and 105 of the sleeve connection structure SV. Under normal circumstances, since the drive rod 131 and the lead screw 152 will not be inserted into the receiving hole K0 of the corresponding sliding sleeve in one step, a self-calibration action is required. The housing assembly 121 is first assembled with the power unit 13. When the pin 1016 of the first housing 101 is inserted into the connection hole 153 of the sleeve assembly 15, the controller of the power unit 13 issues a self-calibration action. The motor of the power unit 13 drives the drive rod 131 to rotate along the first direction (e.g., clockwise). Under the action of the spring 104 in the sleeve core 106, the drive rod 131 of the power unit 13 and the lead screw 152 of the sleeve assembly 15 enter the sliding sleeves 105 and 103 axially and stop circumferentially.

[0076] For example, one version of the medical device also includes a controller configured to rotate the drive rod 131 to perform self-calibration actions on the drive rod 131, the sleeve connection structure SV, and the lead screw 152. The controller may be located in the internal power unit 13, but is not limited thereto.

[0077] The controller is configured to perform at least one of the following steps:

[0078] S1: Drive the drive rod 131 to rotate in the first direction to a specific circumferential position to connect with the sliding sleeve 105, and cause the sleeve connection structure SV to stop circumferentially relative to the drive rod 131;

[0079] S2: Drive the drive rod 131 to rotate in the second direction, causing the sleeve connection structure SV to rotate in the second direction, so that the lead screw 152 is connected to the sliding sleeve 103, and the sleeve connection structure SV stops circumferentially relative to the lead screw 152.

[0080] The aforementioned "specific circumferential position" does not refer to an absolute circumferential orientation, but rather to the relative circumferential orientation of the drive rod 131 and the sliding sleeve 105, such as... Figure 16 As shown, both the drive rod 131 and the lead screw 152 have triangular shafts A and triangular-section holes K0. For example, both have identical equilateral triangle cross-sections. When the drive rod 131 rotates until the projections of the two equilateral triangles on a plane coincide, the circumferential position at this point is a "specific circumferential position." That is, the "specific circumferential position" is the position where shaft A aligns with the receiving hole K0, allowing shaft A to enter the receiving hole K0.

[0081] For example, in some embodiments, the medical device may be a stapler, such as Figure 3As shown, the anastomosis device includes an actuator assembly 18, a cannula assembly 15, and a handle assembly 123. The actuator assembly 18 includes a jaw assembly 181 and a cutting assembly (not shown) dynamically connected to the jaw assembly 181. The cutting assembly has a cutting device at its distal end and a blade at its proximal end. The jaw assembly 181 includes a first jaw and a second jaw that are controlled to open or close. For example, one of the first jaw and the second jaw includes a staple cartridge, and the other includes an anvil capable of deforming staples ejected from the staple cartridge. For example, in other embodiments, the medical device may also be other suitable medical devices such as a clamp applicator; the embodiments of this invention do not specifically limit the type of medical device.

[0082] Anastomosis process: When the drive rod 131 rotates in the first direction to drive the lead screw 152 to rotate in the first direction, the cutting assembly is set to move from the proximal end to the distal end of the stapler under the push of the lead screw 152. The first jaw and the second jaw close to clamp the tissue. The cutting assembly continues to move distally, and the staples in the staple cartridge are pushed out to suture the tissue. The cutting device (blade) of the cutting assembly cuts the sutured tissue. When the drive rod 131 rotates in the second direction to drive the lead screw 152 to rotate in the second direction, the cutting assembly retracts to the proximal end of the jaw assembly 181 under the pull of the lead screw 152, and the first jaw and the second jaw open.

[0083] The housing assembly provided by this utility model has a sleeve connection structure SV, which simplifies the assembly requirements of hole-shaft fits (taking a triangular inner hole and a triangular prism outer shaft as an example). The calibration action after assembling the sleeve assembly ensures smooth connection of the sleeve connection structure, the sleeve assembly, and the power unit. The sleeve connection structure SV simplifies the assembly requirements of hole-shaft fits (e.g., an inner hole with a triangular cross-section and a triangular shaft); it ensures smooth connection of the sleeve connection structure SV, the sleeve assembly, and the handle assembly containing the power unit, and ensures the connection of the drive rod and the lead screw. The housing assembly provided by this utility model places the sleeve connection structure between the first housing and the cover plate assembly, forming a sterile barrier for the power unit. After use, the sleeve assembly and the handle assembly can be disassembled. Due to the simple structure of the sleeve assembly (only lead screw drive is required), the difficulty of postoperative cleaning and sterilization of the sleeve assembly is reduced, improving surgical safety and extending the service life of the reusable sleeve assembly.

[0084] 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 housing assembly for a medical device, characterized in that, include: Shell body; A cover assembly is disposed at the distal end of the shell body; as well as A sleeve connection structure is disposed at the distal end of the shell body, and at least a portion of the sleeve connection structure is located between the shell body and the cover plate assembly, the sleeve connection structure being configured to be circumferentially rotatable.

2. The housing assembly according to claim 1, characterized in that, The sleeve connection structure includes a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves located within the sleeve core and respectively connected to both ends of the spring. The two sliding sleeves are radially stopped relative to the sleeve core and can slide axially along the sleeve connection structure.

3. The housing assembly according to claim 2, characterized in that, The shell body has a first through hole at its distal end, the cover plate assembly has a cover plate body, the cover plate body has a second through hole, the distal end and proximal end of the sleeve core are respectively connected to the first through hole and the second through hole, and the sleeve core is circumferentially rotatable.

4. The housing assembly according to claim 2, characterized in that, At least one of the two sliding sleeves has a first sleeve portion and a second sleeve portion connected to each other, the outer diameter of the first sleeve portion is smaller than at least a portion of the outer diameter of the second sleeve portion, the first sleeve portion is further away from the spring than the second sleeve portion, and the second sleeve portion has a cavity for receiving an end of the spring.

5. The housing assembly according to claim 4, characterized in that, One of the two sliding sleeves is located at the proximal end of the sleeve core, and is configured to include a first receiving hole at the proximal end; the other of the two sliding sleeves is located at the distal end of the sleeve core, and is configured to include a second receiving hole at the distal end.

6. The housing assembly according to claim 4, characterized in that, At least one end of the sleeve core has a blocking portion, which is configured to block the second sleeve portion of the sliding sleeve disposed within the sleeve core in the axial direction, thereby restricting the second sleeve portion from moving outward from the sleeve core.

7. The housing assembly according to any one of claims 2-6, characterized in that, Each of the two sliding sleeves and one of the sleeve cores has a radial protrusion, and the other of the two sliding sleeves and the sleeve core has a groove, the protrusion being located within and matching the groove, such that the sliding sleeve is radially and circumferentially stopped relative to the sleeve core and is axially slidable.

8. The housing assembly according to any one of claims 2-6, characterized in that, It also includes a first gasket and / or a second gasket, wherein the first gasket is located between the shell body and the sleeve core, and the second gasket is located between the cover plate assembly and the sleeve core.

9. The housing assembly according to any one of claims 2-6, characterized in that, The cover plate assembly and the shell body are fixedly connected to secure the sleeve core.

10. A handle assembly for a medical device, characterized in that, The device includes a power unit and a housing assembly according to any one of claims 1-9, wherein the housing body includes a first housing and a second housing, the first housing and the second housing being rotatably connected, and the power unit is disposed in a cavity formed by the first housing and the second housing.

11. The handle assembly according to claim 10, characterized in that, The power unit includes a drive rod having a matching shape to the proximal end of the sleeve connection structure and being configured to rotate circumferentially about the axis of the sleeve connection structure and connected to the sleeve connection structure.

12. The handle assembly according to claim 11, characterized in that, The sleeve connection structure includes a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves located within the sleeve core and respectively connected to both ends of the spring. The two sliding sleeves are respectively radially stopped relative to the sleeve core and can slide axially along the sleeve connection structure. The drive rod and the end of the proximal sliding sleeve have a matching non-circular cross-sectional shape, and the sliding sleeve is configured as follows: When the power unit is initially installed into the housing body, the end of the sliding sleeve abuts against the drive rod; When the drive rod rotates to a specific circumferential position, the sliding sleeve slides axially under the pressure of the spring and is fitted onto the drive rod, so that the sleeve connection structure stops circumferentially relative to the drive rod.

13. A medical device, characterized in that, include: The handle assembly according to claim 11 or 12; as well as The sleeve assembly is configured to be detachably connected to the handle assembly.

14. The medical device according to claim 13, characterized in that, The sleeve assembly includes a lead screw, the distal end of which has a matching non-circular cross-sectional shape and is configured to be connected to the sleeve connection structure.

15. The medical device according to claim 14, characterized in that, The sleeve connection structure includes a sleeve core, a spring disposed within the sleeve core, and two sliding sleeves located within the sleeve core and respectively connected to both ends of the spring. The two sliding sleeves are radially stopped relative to the sleeve core and can slide axially along the sleeve connection structure. The lead screw and the end of the sliding sleeve near the proximal end have matching non-circular cross-sectional shapes. The power unit also includes a controller configured to perform at least one of the following steps: S1: Drive the drive rod to rotate in a first direction to a specific circumferential position to connect with the sliding sleeve at the proximal end, and cause the sleeve connection structure to stop circumferentially relative to the drive rod; S2: Drive the drive rod to rotate in the second direction, thereby causing the sleeve connection structure to rotate in the second direction, so that the lead screw is connected to the sliding sleeve at the far end, and the sleeve connection structure is stopped circumferentially relative to the lead screw.

16. The medical device according to claim 15, characterized in that, It also includes an actuator assembly comprising a jaw assembly and a cutting assembly, the actuator assembly being detachably connected to the distal end of the sleeve assembly, and the distal end of the lead screw being connected to the cutting assembly. When the drive rod, the lead screw, and the sleeve connection structure are connected and relatively circumferentially stopped, the controller is further configured to perform at least one of the following steps: S3: Drive the drive rod to rotate in the first direction to drive the lead screw to rotate in the first direction, thereby pushing the cutting assembly toward the distal end of the medical device to close the jaw assembly and / or cut tissue; S4: Drive the drive rod to rotate in the second direction to drive the lead screw to rotate in the second direction, thereby pulling the cutting assembly toward the proximal end of the medical device to open the jaw assembly.

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