Suction device and its head assembly

Abstract

This invention relates to a suction device and its head assembly. The suction device includes a suction body, a suction rod, and a head assembly connected sequentially from proximal to distal. The head assembly includes a suction head, which comprises an outer sleeve and at least one inner sleeve movably inserted within the outer sleeve. The inner sleeve is drivable and movable relative to the outer sleeve, thereby adjusting the axial length and / or radial diameter of the suction head. This invention enables precise positioning of the suction head to the affected area, improving surgical efficiency and outcomes. Furthermore, it allows for variable flow suction or irrigation, enabling the suction device to meet different needs during surgery, effectively reducing surgical costs and simplifying the surgical procedure.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a suction device for suction or rinsing and its head assembly. Background Technology

[0002] Surgical robots (such as laparoscopic surgery) use suction devices during operation. The main functions of the suction device are: (1) suction function, to remove bleeding, broken tissue and residual fluid during surgery; (2) rinsing function, to clean blood and tissue fluid in the affected area with saline or compressed air, to clear the surgical field and facilitate surgical operation. The suction device has a suction head at the end and a suction rod connected to the suction head. The suction head completes suction or rinsing under the control of the control mechanism. Both the suction head and the suction rod are rigid tubes that cannot be extended or deflected. When the affected area is located in a deep or narrow position, the suction head cannot be accurately positioned to the affected area due to problems such as the suction device not being long enough or the suction head being too large, which affects the surgical effect and reduces the surgical efficiency. Moreover, the same suction device cannot simultaneously meet the needs of precise suction or rinsing and rapid suction or rinsing. Different suction devices need to be replaced to achieve this, which not only increases the surgical cost, but also makes the surgical operation more complicated and further reduces the surgical efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a suction device and its head assembly, which enables the suction head to be precisely positioned at the affected area, improving surgical efficiency and effectiveness. It also enables variable flow suction or flushing, allowing the suction device to meet different needs during the surgical process, effectively reducing surgical costs and simplifying the surgical procedure.

[0004] To achieve the above objectives, the present invention provides a suction head device, comprising a suction head including an outer sleeve and at least one inner sleeve movably disposed within the outer sleeve, wherein the inner sleeve is drivable to move relative to the outer sleeve to adjust the axial length and radial diameter of the suction head.

[0005] In one embodiment, the suction head further includes a guide structure disposed between the inner sleeve and the outer sleeve, the guide structure being used to restrict the circumferential rotation of the inner sleeve, and the inner sleeve being used to move axially along the guide structure.

[0006] In one embodiment, the head device further includes a drive member connected to the inner sleeve, the drive member being driven to move and cause the inner sleeve to move axially.

[0007] In one embodiment, the driving member drives the inner sleeve to move axially by moving itself, and the suction head further includes an elastic structure. The driving member is connected to the inner sleeve, and the elastic structure is connected to one of the inner sleeve and the driving member.

[0008] When the driving member drives the inner sleeve to move axially from the distal end to the proximal end, the elastic structure stores elastic potential energy.

[0009] When the elastic structure releases its elastic potential energy, the inner sleeve moves axially from the proximal end to the distal end under the elastic force of the elastic structure.

[0010] In one embodiment, the driving element is a wire directly connected to the inner sleeve; alternatively, the driving element includes a wire and a driving tube, the driving tube being movably disposed in the outer sleeve and located on the proximal side of the inner sleeve, the wire being directly connected to the driving tube, the distal end of the driving tube being directly and fixedly connected to the proximal end of the inner sleeve, and the elastic structure being disposed between the driving tube and the outer sleeve and connected to the driving tube.

[0011] In one embodiment, the driving member drives the inner sleeve to move axially by rotating itself. The driving member is a driving tube, which is rotatably disposed in the outer sleeve and located on the proximal side of the inner sleeve. The distal end of the driving tube is movably connected to the proximal end of the inner sleeve. The driving tube is driven to rotate, thereby causing the inner sleeve to move axially.

[0012] In one embodiment, the outer wall of the drive tube is provided with an arc-shaped groove, and the inner wall of the inner sleeve is provided with a sliding part that cooperates with the arc-shaped groove.

[0013] In one embodiment, the number of inner sleeves is one or more; when the number of inner sleeves is multiple, the multiple inner sleeves are nested sequentially, and each inner sleeve can be driven to move independently, and the structures of the multiple inner sleeves are the same or different.

[0014] In one embodiment, the inner sleeve includes a plurality of movable petals arranged sequentially along its circumference. All the movable petals are connected sequentially by connectors to form a ring structure, and any two adjacent movable petals can move relative to each other radially along the inner sleeve.

[0015] In one embodiment, the connector is an elastic member, and the connector is either separately molded or integrally molded with the movable flap.

[0016] In one embodiment, the guide structure includes a first guide portion disposed on the outer sleeve and a second guide portion disposed on the inner sleeve. Each movable flap is provided with a second guide portion, and each second guide portion cooperates with a corresponding first guide portion. One of the first guide portion and the second guide portion is a guide groove, and the other is a guide boss. The guide groove and the guide boss are engaged with inclined surfaces.

[0017] In one embodiment, the suction head further includes a limiting structure for limiting the maximum movement distance of the inner sleeve, and the limiting structure is disposed on the movement path of the inner sleeve.

[0018] In one embodiment, the suction head further includes a driving member connected to the inner sleeve. The driving member can be driven to move the inner sleeve axially. The limiting structure includes a limiting baffle wall disposed on the driving member and a stop surface disposed on the outer sleeve. When the driving tube drives the inner sleeve to move axially, the limiting baffle wall can be blocked by the stop surface and no longer move.

[0019] In one embodiment, the suction head further includes a rotating structure, the proximal end of the outer sleeve is fixedly connected to the rotating structure, and the rotating structure can be driven to rotate, thereby causing the suction head to sway.

[0020] In one embodiment, the rotating structure is a snake-bone structure, which is used to rotate under the drive of the transmission wire.

[0021] In one embodiment, the suction head has a side suction port; when the inner sleeve is driven to move axially, the fluid flow area corresponding to the side suction port can be increased or decreased.

[0022] In one embodiment, the side suction port includes: a plurality of external fluid ports disposed on the outer sleeve, and a plurality of internal fluid ports disposed on the inner sleeve; the aperture of the external fluid ports is larger than the aperture of the internal fluid ports.

[0023] When the inner sleeve is driven to retract into the outer sleeve, each of the external fluid ports coincides with a corresponding internal fluid port;

[0024] When the inner sleeve is driven to extend at least partially from the distal end of the outer sleeve, at least a portion of the external fluid port does not coincide with the internal fluid port.

[0025] To achieve the above objectives, the present invention also provides an aspirator, which includes an aspirator body and an aspirator rod, and further includes an aspirator head as described in any one of the claims, wherein the aspirator body, the aspirator rod and the aspirator head are connected sequentially from the proximal end to the distal end.

[0026] In one embodiment, the suction head further includes a drive member connected to the inner sleeve, the drive member being rotatable to drive the inner sleeve to move axially, wherein the suction device further includes a rotation transmission mechanism connected to the drive member, the rotation transmission mechanism being used to drive the drive member to rotate.

[0027] The suction device and its head assembly provided by this invention include a suction head comprising an outer sleeve and at least one inner sleeve movably inserted within the outer sleeve. The inner sleeve is drivable and movable relative to the outer sleeve to adjust the axial length and radial diameter of the suction head. This configuration facilitates adjustment of the axial length and radial diameter of the suction head, enabling it to meet different needs during surgery. Especially when the affected area is located in a deep or narrow location, the suction head can become longer and thinner to reach deeper or narrower areas for suction or irrigation. This allows for precise positioning of the suction head to the affected area, improving surgical efficiency and outcomes. Furthermore, it enables variable-flow suction or irrigation, effectively reducing surgical costs and simplifying the surgical procedure.

[0028] The suction device and its head assembly provided by this invention include a rotating structure. The proximal end of the outer sleeve is fixedly connected to the rotating structure, which can be driven to rotate and cause the suction head to sway. This configuration enables the suction head to sway and tilt, allowing for precise positioning of the suction head even in deep cavities or narrow spaces, making the surgery more convenient, accurate, and efficient. Attached Figure Description

[0029] In the accompanying drawings, the same reference numerals denote similar components or actions. The dimensions and relative positions of components in the drawings are not necessarily drawn to scale. For example, the shapes and angles of various components are not necessarily drawn to scale, and some of these components may be arbitrarily enlarged and positioned to improve the clarity of the drawings. Furthermore, the specific shapes of the drawn components do not necessarily convey any information about the actual shape of the particular component; they are merely chosen to be easily identifiable in the accompanying drawings.

[0030] Figure 1 This is an application scenario diagram of the surgical robot system in an embodiment of the present invention;

[0031] Figure 2This is a diagram illustrating a slave-assisted surgical application scenario in a surgical robot system according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the structure of the suction device installed at the end of the robotic arm in an embodiment of the present invention;

[0033] Figure 4 This is an overall structural diagram of the suction device in an embodiment of the present invention;

[0034] Figure 5 yes Figure 4 A magnified view of the suction device at position a in the middle;

[0035] Figure 6 This is a view of the head device in a first state according to Embodiment 1 of the present invention;

[0036] Figure 7 This is a view of the head device in the second state in Embodiment 1 of the present invention;

[0037] Figure 8 This is a schematic diagram of the head device in Embodiment 1 of the present invention, which is capable of tilting.

[0038] Figure 9 This is a schematic diagram of the head device capable of rotating in Embodiment 1 of the present invention;

[0039] Figure 10 This is a schematic diagram showing the state in which the head device in Embodiment 1 of the present invention can achieve compound motion;

[0040] Figure 11 This is a top view of the suction head in Embodiment 1 of the present invention, wherein there are multiple inner sleeves nested in sequence;

[0041] Figure 12 This is a view of the suction head in the first state in Embodiment 2 of the present invention;

[0042] Figure 13 This is a view of the suction head in the second state in Embodiment 2 of the present invention;

[0043] Figure 14 This is a view of the inner sleeve in the first state in Embodiment 2 of the present invention;

[0044] Figure 15 This is a view of the inner sleeve in the second state in Embodiment 2 of the present invention;

[0045] Figure 16 This is an axial cross-sectional view of the head device in the first state in Embodiment 2 of the present invention;

[0046] Figure 17 This is an axial cross-sectional view of the head device in the second state in Embodiment 2 of the present invention;

[0047] Figure 18 This is a partial view of the distal end of the driving transistor in Embodiment 2 of the present invention;

[0048] Figure 19 This is a partial view of the proximal end of the inner sleeve in Embodiment 2 of the present invention;

[0049] Figure 20 This is a partial view of the outer sleeve in Embodiment 2 of the present invention;

[0050] Figure 21 This is an overall schematic diagram of the suction head in Embodiment 3 of the present invention;

[0051] Figure 22 This is a view showing the suction head in a first state when the drive tube and inner sleeve are engaged in the third embodiment of the present invention.

[0052] Figure 23 This is a view showing the suction head in a second state when the drive tube and inner sleeve are engaged in the third embodiment of the present invention.

[0053] Figure 24 This is a partial view of the proximal end of the inner sleeve in Embodiment 3 of the present invention;

[0054] Figure 25 This is a partial view of the distal end of the driving transistor in Embodiment 3 of the present invention;

[0055] Figure 26 This is a top view of the integrally formed inner sleeve in Embodiment 4 of the present invention.

[0056] [The annotations in the attached figures are explained below]:

[0057] 100 - Master end; 200 - Slave end; 201 - Robotic arm; 202 - Surgical instrument; 300 - Image trolley; 400 - Tool cart; 230 - Drive package; 210 - Suction device; 211 - Suction device body; 212 - Suction device rod; 213 - Suction device head; 2131 - Outer tube; 21311 - Stop surface; 21312 - Guide groove; 2132 - Inner tube; 21321 - Connecting post; 21322 - Guide boss; 2133 - Movable flap ; 2134-Connector; 2135-Mounting groove; 2136, 2136'-Drive pipe; 21361-Limiting baffle; 21362-Connecting hole; 21363-Arc groove; 2137-Spring; 213a-End fluid port; 213b-Side fluid port; 213c-External fluid port; 213d-Internal fluid port; 214-Rotating structure; 2141-First transmission disc; 2142-Second transmission disc; 2143-Third transmission disc. Detailed Implementation

[0058] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0059] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. In this application, for ease of understanding, terms such as "proximal" and "distal" are used. These terms refer to the relative orientation, position, or direction of elements or movements relative to each other from the perspective of a physician using the device. "Proximal," "distal," and "end" are not limiting, but "proximal" generally refers to the end closer to the operator of the product, while "distal" or "end" generally refers to the end farther from the operator. As used in this specification, the singular forms "a," "an," and "the" include plural objects unless otherwise expressly stated. As used in this specification, the term "or" is generally used to include the meaning of "and / or" unless otherwise expressly stated. As used in this specification, the terms "a plurality" and "several" are generally used to include the meaning of "two or more" unless otherwise expressly stated. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or at least two of those features.

[0060] Furthermore, the terminology described herein is not intended to limit the scope of the invention. For example, spatially relative terms—such as “below,” “under,” “down,” “above,” “above,” “horizontal,” “vertical,” etc.—may be used to describe the relationship between one element or feature and another element or feature as shown in the figures. These spatially relative terms are intended to include different positions and orientations of the device in use or operation, other than those shown in the figures. For example, if the device in the figures is flipped, then the element described as “below other elements or features” or “under other elements or features” will then be “above other elements or features” or “above other elements or features.” Thus, the example term “below” can include both above and below positions and orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise), and the spatially relative descriptive terms used herein are interpreted accordingly. Similarly, descriptions of movement along and about various axes include various specific device positions and orientations. Furthermore, the term "comprising" specifies the presence of the described features, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups. Components described as connected may be electrically or mechanically directly connected, or they may be indirectly connected via one or more intermediate components. In this document, "axial" refers to the direction along the axis of the suction rod or suction head; "radial" refers to the direction along the cross-section of the suction rod or suction head; and "circumferential" refers to the direction around the axis of the suction rod or suction head.

[0061] The present invention will be described in more detail below with reference to the accompanying drawings and preferred embodiments. In the absence of conflict, the following embodiments and features can complement or combine with each other.

[0062] Figure 1 An application scenario diagram of the surgical robot system disclosed in this application is shown. For example... Figure 1 As shown, the surgical robot system includes a master-slave teleoperated surgical robot, namely, the surgical robot system includes a master end 100 (i.e., the doctor's console), a slave end 200 (i.e., the surgical execution device), a main controller, and a support device (e.g., an operating table) for supporting the surgical object during surgery. It should be noted that in some embodiments, the support device may be replaced with other surgical operation platforms, and this application is not limited to this.

[0063] The master end 100 is the operating end of the teleoperated surgical robot and includes a master manipulator mounted thereon. The master manipulator receives hand movement information from the operator as motion control signal input for the entire system. Optionally, the main controller is also located on the master end 100. Preferably, the master end 100 also includes an imaging device that provides the operator with stereoscopic images and surgical field images for surgical operations. The surgical field images include the type and quantity of instruments, their position in the abdomen, and the morphology and arrangement of the patient's organs and surrounding organs and blood vessels. Optionally, the master end 100 also includes a foot-operated surgical control device, through which the operator can input related operational commands such as electrocautery and electrocoagulation. The slave end 200 is the specific execution platform of the teleoperated surgical robot and includes a base and surgical execution components mounted thereon. The surgical execution components include a robotic arm 201 and surgical instruments 202, with the surgical instruments 202 mounted or connected to the end of the robotic arm 201. The surgical instrument 202 can be an instrument used to perform specific surgical operations (such as a suction device) or an endoscope used for auxiliary observation. In one embodiment, the robotic arm 201 includes an adjustable arm and a tool arm connected together. The tool arm is typically a mechanical fixed-point mechanism used to drive the surgical instrument 202 to move around the mechanical fixed point to achieve minimally invasive surgical treatment or imaging operations on the patient on the support device. The adjustable arm is used to adjust the position and orientation of the mechanical fixed point in the workspace. In another embodiment, the robotic arm 201 is a mechanism with at least five degrees of freedom in a spatial configuration used to drive the surgical instrument 202 to move around an active fixed point under program control. The surgical instrument 202 is used to perform specific surgical operations, such as clamping, cutting, scissing, suctioning, and rinsing. It should be noted that since the surgical instrument 202 has a certain volume in practice, the aforementioned "fixed point" should be understood as a stationary region. Of course, those skilled in the art can understand the "fixed point" according to existing technology.

[0064] The main controller is communicatively connected to both the master end 100 and the slave end 200, and is used to control the movement of the surgical execution component based on the movement of the master operator. Specifically, the main controller includes a master-slave mapping module, which is used to acquire the end-effector pose of the master operator and a predetermined master-slave mapping relationship, obtain the desired end-effector pose of the surgical execution component, and then control the robotic arm 201 to drive the surgical instrument 202 to move to the desired end-effector pose. Furthermore, the master-slave mapping module is also used to receive medical device function operation commands (such as electrocautery, electrocoagulation, and other related operation commands), and control the energy driver of the surgical instrument to release energy to perform surgical operations such as electrocautery and electrocoagulation. In some embodiments, the main controller also receives force information received by the surgical execution component (e.g., force information of human tissues and organs on the medical device) and feeds back the force information received by the surgical execution component to the master operator, so that the operator can more intuitively feel the feedback force of the surgical operation.

[0065] Furthermore, the surgical robot system also includes an image cart 300. The image cart 300 includes an image processing unit (not shown) communicatively connected to an endoscope. The endoscope is used to acquire surgical field images within the cavity (referring to the patient's body cavity). The image processing unit is used to perform image processing on the surgical field images acquired by the endoscope and transmit them to an imaging device so that the operator can observe the surgical field images. Optionally, the image cart 300 also includes a display device. The display device is communicatively connected to the image processing unit and is used to provide the operator (e.g., a nurse) with real-time display of the surgical field images or other auxiliary display information. Optionally, in some surgical applications, the surgical robot system also includes auxiliary components such as a ventilator, anesthesia machine, and instrument table for use during surgery. Additionally, in some surgical applications, all surgical instruments 202 are first placed on a tool cart 400 for easy retrieval, and then the surgical instruments 202 are mounted on the end of the robotic arm 201 of the surgical robot. Those skilled in the art can select and configure these auxiliary components based on existing technology, which will not be described in detail here.

[0066] It should be noted that the surgical robot system disclosed in the above examples is only an example of an application scenario and not a limitation on the application scenario of the surgical robot system. The surgical robot system is not limited to a master-slave teleoperated surgical robot, but can also be a single-end surgical robot system, that is, without master-slave control, in which the operator directly operates the surgical robot at the patient end to perform surgery. This invention is not limited to this.

[0067] Figure 2 This illustration shows an application scenario of the surgical procedure assisted by the distal end 200 described in this application. The description uses the surgical instrument 202 as a suction device 210, as shown below. Figure 2As shown, the end of the robotic arm 201 is detachably connected to a suction device 210, which is a type of surgical instrument 202. The robotic arm 201 controls the suction device 210 to perform corresponding surgical operations. The main functions of the suction device 210 are suction and irrigation; suction is used to remove bleeding, broken tissue, and residual fluid during surgery; irrigation is used to clean the affected area of ​​blood and tissue fluid using saline or compressed air, etc., to make the surgical field clearer and facilitate surgical operations. This application does not limit the specific structure of the robotic arm 201. For example, the robotic arm 201 can be a five-degree-of-freedom robotic arm, a six-degree-of-freedom robotic arm, or a robotic arm with more than one degree of freedom. The robotic arm 201 can drive the suction device 210 to move, thereby controlling the position and orientation of the suction device 210. The robotic arm 201 can also provide power to the suction device 210 to drive its movement.

[0068] In existing technologies, medical staff mainly use conventional hand-held suction devices for suction or rinsing, which not only results in low surgical efficiency but also increases the workload of medical staff and reduces the comfort of surgical procedures. Compared with existing technologies, this application uses a robotic arm 201 to hold and control the suction device 210 for suction or rinsing, eliminating the need for medical staff to use the hand-held device. This makes the surgical procedure more precise and reliable, and also simpler and more convenient, thereby improving surgical efficiency and the comfort of surgical procedures.

[0069] Figure 3 A schematic diagram of the structure of the suction device 210 installed at the end of the robotic arm 201 in an embodiment of this application is shown. Figure 3 As shown, the end of the robotic arm 201 is provided with a drive package 230, which is connected to the suction device 210 to provide power to the suction device 210. The drive package 230 includes several drive motors, which drive the suction device 210 to move. In actual use, the suction device 210 is first detachably connected to the robotic arm 201, then the suction device 210 is inserted into the human body, and then the robotic arm 201 drives the suction device 210 to perform the corresponding movement.

[0070] To achieve suction or flushing, the suction device 210 is configured to connect to a pressure device capable of generating pressure, which provides delivery pressure to the suction device 210 to suction or flush the target location. The pressure device is typically a power pump. Preferably, the main end 100 is communicatively connected to the pressure device and used to directly control the flow of fluid from the pressure device to the suction device 210; alternatively, the main end 100 is communicatively connected to a valve between the pressure device and the suction device 210, controlling the flow of fluid between them by opening and closing the valve.

[0071] Figure 4 and Figure 5A schematic diagram of the overall structure and a partially enlarged view of the suction device 210 in an embodiment of this application are shown. Figure 4 and Figure 5 As shown, the suction device 210 includes a suction body 211, a suction rod 212, and a head assembly connected sequentially from proximal to distal end. The head assembly includes a suction head 213. Preferably, the head assembly further includes a rotating structure 214, through which the distal end of the suction rod 212 is connected to the suction head 213. The rotating structure 214 is driven to rotate, causing the suction head 213 to perform a yaw motion. The rotating structure 214 may have one or two degrees of rotational freedom; if the rotating structure 214 provides two degrees of rotational freedom, the rotation axes of the two degrees of rotation are perpendicular and skewed. It should be understood that the yaw setting of the suction head 213 allows the suction head 213 to be precisely positioned at the affected area, achieving more precise suction or irrigation, making the surgery more convenient and accurate, the surgical efficiency higher, and the suction or irrigation effect better.

[0072] The suction device body 211 includes an instrument box and related electrical and / or mechanical components integrated within it. The instrument box has a transmission interface connected to a drive package 230 for power transmission. A drive shaft connected to the transmission interface is integrated within the instrument box, and this drive shaft drives a rotating structure 214 via a wire drive mechanism. The transmission wire in the wire drive mechanism passes through the suction rod 212 and connects to the rotating structure 214, thereby driving the rotating structure 214 to deflect the suction head 213. The main function of the suction rod 212 is to connect and support the suction head 213 and provide protection for the connection between the rotating structure 214 and the wire drive mechanism. The suction rod 212 also provides a fluid transmission channel. Furthermore, the suction head 213 is the final actuator, used to perform surgical actions to achieve suction or flushing. Suction involves removing bleeding, broken tissue, and residual fluid during surgery, while flushing involves rinsing the affected area with a cleaning substance (such as saline or compressed air) to remove blood and tissue fluid. The rotating structure 214 may be a snake-bone structure or a Hooke's joint, etc. The instrument box is provided with a mounting interface for detachable connection to the robotic arm 201, and a power interface for connecting to pressure equipment. The mounting interface and / or the power interface are preferably quick-release structures.

[0073] To address the problem of existing suction devices failing to accurately position the suction head at the affected area, the suction device 210 provided in this application features an adjustable axial length and / or radial diameter of the suction head 213. This configuration allows for precise positioning of the suction head 213 even at deeper or narrower locations, resulting in more accurate, efficient, and effective surgery. Specifically, the suction head 213 includes an outer sleeve and at least one inner sleeve movably inserted within the outer sleeve. The inner sleeve can be driven to move axially relative to the outer sleeve, thereby changing the dimensions of the suction head 213, which are its axial length and / or radial diameter (the radial diameter includes both the outer and inner diameters).

[0074] It should be understood that the increase or decrease in the radial diameter of the suction head 213 is because the outer diameter of the inner sleeve is smaller than that of the outer sleeve. The overall outer diameter of the suction head 213 is adjusted by extending or retracting the inner sleeve. When the inner sleeve extends at least partially out of the outer sleeve, the outer diameter of the farthest end of the suction head 213 is the outer diameter of the inner sleeve due to the exposure of the inner sleeve. Conversely, when the inner sleeve is completely retracted into the outer sleeve, the outer diameter of the farthest end of the suction head 213 is the outer diameter of the outer sleeve due to the non-exposed inner sleeve. Preferably, the radial diameter of the inner sleeve itself is adjustable, allowing for more variations in the radial diameter of the suction head 213 to adapt to more usage scenarios. To allow for various variations in the radial diameter of the suction head 213, in addition to the adjustable radial diameter of the inner sleeve itself, multiple inner sleeves can be configured, nested sequentially, with any two adjacent inner sleeves able to move relative to each other. This multi-layer telescopic method can further increase the axial length of the suction head 213.

[0075] Preferably, the fluid flow area of ​​the suction head 213 is adjustable; when precise suction or rinsing is required, the fluid flow area decreases; when rapid suction or rinsing is required, the fluid flow area increases. This configuration allows the same suction head 210 to be used for different needs during surgery without requiring instrument changes, simplifying surgical procedures, improving surgical efficiency, and reducing surgical costs.

[0076] The structure of the suction head 213 will be further explained below with reference to specific embodiments.

[0077] <Example 1>

[0078] See Figure 6 and Figure 7In the first embodiment of this application, the suction head 213 includes an outer sleeve 2131 and at least one inner sleeve 2132 movably disposed in the outer sleeve 2131. Each inner sleeve 2132 can be driven to move relative to the outer sleeve 2131 along the axial direction of the suction head 213, thereby simultaneously changing the axial length and outer diameter of the suction head 213.

[0079] Taking an inner sleeve 2132 as an example, Figure 6 As shown, the suction head 213 has a first state in which the inner sleeve 2132 is retracted entirely into the outer sleeve 2131, making the overall length of the suction head 213 smaller and the overall outer diameter larger; as Figure 7 As shown, the suction head 213 also has a second state in which the inner sleeve 213 extends at least partially from the distal end of the outer sleeve 2131, so that the suction head 213 has a second axial length, a first outer diameter and a second outer diameter. The second axial length is greater than the first axial length. The first outer diameter is the outer diameter of the outer sleeve 2131 and the second outer diameter is the outer diameter of the inner sleeve 2132. Therefore, the overall length of the suction head 213 becomes longer and the outer diameter at the distal end becomes smaller.

[0080] The suction device 210 has a built-in drive unit connected to the inner sleeve 2132 to directly drive the inner sleeve 2132 to move axially from the distal end to the proximal end or from the proximal end to the distal end. Further, the drive unit drives the inner sleeve 2132 to move axially by its own movement. The suction head 213 also includes an elastic structure connected to the inner sleeve 2132 or the drive unit. The drive unit can be, for example, a rope, a thread, or a rod-like structure. Taking a thread as an example, one end of the thread is connected to the drive wheel, and the other end passes through the suction rod 212 and connects to the inner sleeve 2132. The thread directly pulls the inner sleeve 2132 from the distal end to the proximal end, while simultaneously compressing the elastic structure. One end of the elastic structure is fixed, and the other end is connected to the inner sleeve 2132 or the drive unit. When the elastic structure releases its elastic potential energy, it can push the inner sleeve 2132 from the proximal end to the distal end. Furthermore, one end of the elastic structure is fixedly connected to the rotating structure 214 or the outer sleeve 2131.

[0081] In this embodiment, the suction head 213 has an end fluid port 213a located at the distal end and a side fluid port 213b located on the side. When the inner sleeve 2132 moves axially relative to the outer sleeve 21312, the fluid flow area of ​​the side fluid port 213b can also be changed. The fluid flow area refers to the fluid flow area of ​​the end fluid port 213a and the fluid flow area of ​​the side fluid port 213b; wherein, the fluid flow area of ​​the end fluid port 213a remains constant, while the fluid flow area of ​​the side fluid port 213b can be increased or decreased. The side fluid port 213b includes: a plurality of external fluid ports 213c disposed on the outer sleeve 2131, and a plurality of internal fluid ports 213d disposed on the inner sleeve 2132; the diameter of the external fluid ports 213c is larger than the diameter of the internal fluid ports 213d; when the external fluid ports 213c and the corresponding internal fluid ports 213d coincide, the effective fluid flow area is defined by the internal fluid ports 213d, and the fluid flow area on the side is small; when the external fluid ports 213c and the corresponding internal fluid ports 213d do not coincide, the effective fluid flow area is defined by both the internal fluid ports 213d and the external fluid ports 213c, thereby increasing the fluid flow area on the side.

[0082] Taking an inner sleeve 2132 as an example, Figure 6 As shown, when the inner sleeve 2132 is driven back into the outer sleeve 2131, the overall length of the suction head 213 becomes shorter and the diameter of the distal end becomes larger, enabling rapid suction or rinsing; optionally, when the inner sleeve 2132 is driven back into the outer sleeve 2131, each external fluid port 213c coincides with a corresponding internal fluid port 213d, and the fluid flow area on the side is the same as that of the internal fluid port 213d. At this time, the fluid flow area of ​​the side fluid port 213b is smaller; as Figure 7 As shown, when the inner sleeve 2132 is driven to extend at least partially from the distal end of the outer sleeve 2131, the overall length of the suction head 213 increases, and the diameter of the distal end decreases, allowing the suction head 213 to reach deeper or narrower locations for suction or irrigation, achieving precise suction or irrigation. Optionally, when the inner sleeve 2132 is driven to extend at least partially from the distal end of the outer sleeve 2131, at least a portion of the external fluid port 213c and the internal fluid port 213d do not overlap and are separated from each other. The fluid flow area on the side is the separated internal fluid port 213d and the external fluid port 213c. At this time, the fluid flow area of ​​the side fluid port 213b increases. With this configuration, the suction head 213 of this application can achieve variable-diameter suction or irrigation, enabling the same suction device 210 to simultaneously meet the needs of precise suction or irrigation and rapid suction or irrigation, and can also adapt to the needs of different surgical scenarios.

[0083] Further reading Figures 8 to 10 The suction head 213 has two degrees of freedom of rotation, each rotating about a first axis r1 and a second axis r2. The first axis r1 and the first axis r2 are skewed and perpendicular to each other. The rotating structure 214 is connected to multiple drive wires. One end of each drive wire is connected to a drive wheel in the suction body 211, and the drive wheel is connected to a drive shaft. The other end of each drive wire passes through the suction rod 212 and is connected to the rotating structure 214. The multiple drive wires drive the rotating structure 214, which in turn drives the suction head 213 to rotate about the first axis r1 and the first axis r2. In a specific embodiment, see [reference needed]. Figure 8 The rotating structure 214 includes a first transmission disk 2141, a second transmission disk 2142, and a third transmission disk 2143 connected in sequence. The second transmission disk 2142 can deflect relative to the first transmission disk 2141 about a first axis r1, and the third transmission disk 2143 can deflect relative to the second transmission disk 2142 about a second axis r2. The first transmission disk 2141 is fixedly connected to the distal end of the suction rod 212, and the third transmission disk 2143 is fixedly connected to the outer sleeve 2131. Here, the rotating structure 214 is configured as a serpentine structure, which is simple in structure and has high transmission efficiency. It should be understood that every two transmission wires form a group to drive the corresponding group of transmission disks to rotate relative to each other, thereby achieving one degree of rotational freedom.

[0084] Therefore, when the affected area is located in a deeper or narrower position, the suction head 213 can be deflected to maximize its reach into the operating area and precisely position it at the affected area, thereby achieving accurate suction or irrigation and improving surgical efficiency and outcome. Furthermore, the direct drive of the serpentine structure by the transmission wire enables flexible deflection at the end, resulting in high transmission precision, a simple structure, and more stable and reliable movement. It should also be understood that the rotating structure 214 has an internal transmission channel for suction or irrigation, such as by inserting a tube inside the rotating structure 214 to construct the transmission channel.

[0085] like Figure 8 As shown, the suction head 213 can oscillate left and right around the second axis r2, with a degree of freedom ranging from 0° to 180°. That is, the oscillation angle of the suction head 213 relative to a predetermined direction is 0° to 180°, where the predetermined direction is the axial direction from the proximal end to the distal end of the suction device 210. Furthermore, the suction head 213 can also pitch forward and backward around the first axis r1, with a degree of freedom ranging from 0° to 180°. That is, the pitch angle of the suction head 213 relative to a predetermined direction is 0° to 180°. It should be understood that the suction head 213 can rotate independently around the first axis r1 or the second axis r2, or simultaneously around both axes r1 and r2.

[0086] like Figure 9As shown, the suction head 213 can also rotate around the third axis r3. Preferably, the suction rod 212 drives the suction head 213 to rotate together, that is, the suction rod 212 can rotate. This rotation is mainly driven by the drive motor in the drive package 230 through the drive shaft in the suction body 211. The rotational degree of freedom of the suction head 213 is mainly used to adjust the circumferential position of the suction head 213, so that the side fluid ports 213b at different circumferential positions of the suction head 213 can be aligned with the target position for suction or rinsing. In this embodiment, the rotational degree of freedom range of the suction head 213 is preferably -270° to +270°, that is, it can rotate 0° to 270° in the forward direction and 0° to 270° in the reverse direction. Preferably, the third axis r3, the first axis r1, and the second axis r2 are perpendicular to each other. In a preferred embodiment of this application, the suction head 213 is capable of lateral swaying, forward and backward pitching, and rotation, thereby achieving multi-degree-of-freedom movement, making the movement of the suction head 213 more flexible, and facilitating the precise positioning of the suction head 213 to the affected area.

[0087] The number, shape, size, and distribution of the side fluid ports 213b are determined according to actual needs, and this application does not impose any special requirements on them. The side fluid ports 213b are generally circular openings, such as those distributed axially and / or circumferentially on the suction head 213. Furthermore, the structure (including size and / or shape) of each external fluid port 213c may be the same or different, and the structure (including size and / or shape) of each internal fluid port 213d may be the same or different. When the suction head 213 is in the first state, the inner sleeve 2132 is generally fully retracted into the outer sleeve 2131, and the number and position of the internal fluid ports 213 usually correspond one-to-one with the number and position of the external fluid ports 213c. When the suction head 213 is in the second state, the inner sleeve 2132 can partially extend out of the outer sleeve 2131. In this case, some external fluid ports 213c are no longer blocked by the internal fluid ports 213d, while some external fluid ports 213c are still blocked by the internal fluid ports 213d. Alternatively, when the suction head 213 is in the second state, the inner sleeve 2132 extends fully out of the outer sleeve 2131, so that all external fluid ports 213c are no longer blocked by the internal fluid ports 213d. Therefore, the fluid flow area can be flexibly adjusted according to actual needs, presenting multiple states, making the suction or rinsing process more flexible and convenient.

[0088] The number of inner sleeves 2132 can be one or more. For example... Figure 11As shown, when there are multiple inner sleeves 2132, multiple inner sleeves 2132 can be nested radially within the outer sleeve 2131, and adjacent inner sleeves 2132 can move relative to each other axially. This arrangement allows for greater variation in the axial length and radial diameter of the suction head 213, enabling it to meet more application scenarios and making the suction or rinsing process more flexible and convenient. The orifice diameter of the internal fluid port 213d in each inner sleeve 2132 can be the same or different. The number of inner sleeves 2132 is preferably one, two, or three, and each inner sleeve 2132 can be driven to move axially up and down as shown above. The structure (shape and size) of each inner sleeve 2132 can be the same or different.

[0089] The head-end device may further include a guide structure disposed between the inner sleeve 2132 and the outer sleeve 2131. The guide structure is used to restrict the circumferential rotation of the inner sleeve 2132, and the inner sleeve 2132 is used to move axially along the guide structure along the suction head 213. The guide structure may include a first guide portion disposed on the outer sleeve 2131 and a second guide portion disposed on the inner sleeve 2132, wherein one of the first guide portion and the second guide portion is a guide groove, and the other is a guide boss.

[0090] It should be understood that in Embodiment 1 of this application, the radial diameter of the inner sleeve 2132 remains unchanged; wherein, the inner sleeve 2132 can only move axially, such as by restricting the circumferential rotation of the inner sleeve 2132 through the guide structure. In other cases, the inner sleeve 2132 can also rotate circumferentially in addition to axial movement, in which case the guide structure can be eliminated.

[0091] <Example 2>

[0092] The following mainly describes the differences from Embodiment 1, while the parts that are the same as in Embodiment 1 can be referred to Embodiment 1.

[0093] See Figures 12-13In Embodiment 2 of this application, there is one inner sleeve 2132, which can be driven to move axially relative to the outer sleeve 2131 (arrow A1) and can also extend and retract radially relative to the outer sleeve 2131 (arrow A2). On the one hand, the axial length of the suction head 213 is changed by the axial movement of the inner sleeve 2132, and on the other hand, the radial diameter of the inner sleeve 2132 is changed by the radial extension and retraction of the inner sleeve 2132, which can also change the fluid flow area of ​​the end fluid port 213a. In Embodiment 1 of this application, on the one hand, the radial diameter of the inner sleeve 2132 remains unchanged, so the fluid flow area of ​​the end fluid port 213a remains unchanged, and what changes is the fluid flow area of ​​the side fluid port 213b. On the other hand, the inner sleeve 2132 can rotate circumferentially.

[0094] Unlike Embodiment 1, in Embodiment 2 of this application, the inner sleeve 2132 can only move and cannot rotate circumferentially. While moving axially, the inner sleeve 2132 uses its own structure to achieve radial expansion and contraction, which increases or decreases the radial diameter of the inner sleeve 2132.

[0095] For details, please refer to [link / reference]. Figure 14 and Figure 15 In Embodiment 2 of this application, the inner sleeve 2132 is constructed as a petal-like structure, comprising multiple movable petals 2133 arranged sequentially along its circumference. These movable petals 2133 are connected sequentially by connectors 2134 to form a ring structure. Any two adjacent movable petals 2133 are retractably connected by the connectors 2134, allowing relative movement between them radially along the inner sleeve. The movement of the movable petals 2133 changes the diameter of the inner sleeve 2132. Figure 14 and Figure 16 As shown, when the inner sleeve 2132 is driven to move distally along the first direction, all the movable flaps 2133 move radially away from each other, which not only increases the axial length of the suction head 213, but also increases the diameter of the inner sleeve 2132; as Figure 15 and Figure 17 As shown, when the inner sleeve 2132 is driven to move distally along the second direction, all the movable flaps 2133 move closer to each other radially, which not only shortens the axial length of the suction head 213, but also reduces the diameter of the inner sleeve 2132. Therefore, the size of the end fluid port 213a can be adjusted by increasing or decreasing the diameter of the inner sleeve 2132.

[0096] The number of movable petals 2133 is not limited to two, but may also be three, four or more, and is not specifically limited. In Embodiment 2 of this application, the number of movable petals 2133 is four, and the four movable petals 2133 are evenly distributed. The connecting member 2134 is used as a movable joint, and its function is to allow the two movable petals 2133 connected to it to move relative to each other. The connecting member 2134 may be elastic or inelastic. Preferably, the connecting member 2134 is an elastic member, and the elastic material can be a metallic elastic material, such as a sheet made of stainless steel, nickel-titanium alloy, etc., or made of a medical polymer material with good elasticity, such as a rubber part. Each movable petal 2133 is provided with a mounting groove 2135, and each connecting member 2134 is simultaneously provided in the mounting grooves 2135 of two adjacent movable petals 2133, and each mounting groove 2135 axially penetrates the movable petal 2133.

[0097] refer to Figure 16 and Figure 17 The driving component may include a thread and a driving tube 2136, and the suction head 213 further includes a spring 2137, wherein the spring 2137 is used as an elastic structure; the driving tube 2136 is movably disposed in the outer tube 2131 and located on the proximal side of the inner tube 2132, the distal end of the driving tube 2136 is fixedly connected to the proximal end of the inner tube 2132, the spring 2137 is located between the driving tube 2136 and the outer tube 2131, one end of the spring 2137 is fixedly connected to the outer tube 2131 or the rotating structure 214, and the opposite end of the spring 2137 is fixedly connected to the inner tube 2132 or the driving tube 2136. Preferably, the spring 2137 is sleeved on the driving tube 2136 and confined between the outer tube 2131 and the driving tube 2136. Furthermore, the suction head 213 is also provided with a limiting structure to limit the maximum movement distance (i.e., the extreme position) of the inner sleeve 2132 or the drive tube 2136, such as the maximum movement distance when moving along the first direction and / or the second direction. The limiting structure is specifically set on the movement path of the inner sleeve 2132.

[0098] Optionally, the limiting structure includes a limiting baffle 21361 disposed on the drive tube 2136 and a stop surface 21311 disposed on the outer tube 2131. The limiting baffle 21361 is disposed on the outer wall of the drive tube 2136 and is used to connect to the other end of the spring 2137, and the spring 2137 is constrained between the limiting baffle 21361 and the rotating structure 214 (such as a rotating disk). Figure 18 As shown, the limiting baffle 21361 can be arranged around the drive tube 2136. Figure 16 and Figure 17As shown, the inner wall of the outer sleeve 2131 is provided with a stop surface 21311. When the drive tube 2136 moves along the first direction, the limiting wall 21361 can be blocked by the stop surface 21311 and cannot continue to move towards the distal end, thus achieving the purpose of distal limit limiting. Preferably, when the drive tube 2136 moves along the second direction to a preset position, it can also be blocked by the limiting structure and cannot continue to move towards the proximal end, thus achieving the purpose of proximal limit limiting. Here, it should be understood that the distal limit limiting and the proximal limit limiting are achieved by two independently provided limiting structures.

[0099] The inner sleeve 2132 and the drive tube 2136 are separately molded structures, and a connecting post 21321 can be provided at the proximal end of the inner sleeve 2132 (see...). Figure 14 and Figure 16 Each movable lobe 2133 is provided with a connecting post 21341, and each connecting post 21341 is engaged with the distal end of the drive tube 2136. For example... Figure 17 As shown, the distal end of the drive tube 2136 is provided with a connection hole 21362, and the connecting post 21321 is inserted into the connection hole 21362 and engaged. Of course, in addition to the engagement connection, other mechanical connection methods can also be used to connect the drive tube 2136 and the inner sleeve 2132, such as threaded connection, welding, etc.

[0100] The suction head 213 also includes the guide structure, which restricts the rotation of the inner sleeve 2132 and guides its movement, allowing it to move axially along the guide structure. Further, the guide structure includes a guide boss 21322 on the outer sleeve 2131 and a guide groove 21312 on the inner sleeve 2132. The inner sleeve 2132 has a guide boss 21322 on its proximal outer side, and each movable flap 2133 has a guide boss 21322. Simultaneously, the outer sleeve 2131 has a guide groove 21312 on its distal inner side. The guide boss 21322 of each movable flap 2133 slides within a corresponding guide groove 21322, wherein the guide groove 21312 and the guide boss 21322 are engaged by an inclined surface. The inclined surface allows the inner sleeve 2132 to move axially while also extending and retracting radially. Preferably, the far end of the guide groove 21312 is connected to a guide straight surface. The guide straight surface allows the inner sleeve 2132 to have a certain amount of free travel when it moves axially.

[0101] It should be understood that in Embodiment 2 of this application, the inner sleeve 2132 can not only move axially to change the axial length of the suction head 213, but also extend and retract radially to change the radial diameter of the suction head 213. With this setting, the application scenarios of the suction head 213 are more flexible and the range of use is wider.

[0102] <Example 3>

[0103] The following mainly describes the differences from Example 2, while the parts that are the same as in Example 2 can be referred to Example 2.

[0104] See Figures 21-25 In Embodiment 3 of this application, another driving tube 2136' is provided, and the driving tube 2136' drives the inner sleeve 2132 to move axially by rotating itself, and the suction device 210 also includes a rotation transmission mechanism; wherein, the driving tube 2136' is rotatably disposed in the outer sleeve 2131 and located on the proximal side of the inner sleeve 2132, the rotation transmission mechanism is connected to the driving tube 2136' and used to drive the driving tube 2136' to rotate, the distal end of the driving tube 2136' is movably connected to the proximal end of the inner sleeve 2132, and the inner sleeve 2132 moves axially under the drive of the driving tube 2136', and can also extend and retract radially; while in Embodiment 2 of this application, the driving tube 2136 drives the inner sleeve 2132 to move axially by moving itself, and the driving tube 2136 and the inner sleeve 2132 in Embodiment 2 cannot move relative to each other.

[0105] The structure of the rotational transmission mechanism is not limited, and can be gear transmission or belt transmission, etc. In Embodiment 3 of this application, one of the drive tube 2136' and the inner sleeve 2132 is provided with an arc-shaped groove, and the other is provided with a sliding part that moves along the arc-shaped groove; optionally, the outer wall of the drive tube 2136' is provided with an arc-shaped groove 21363, each movable lobe 2133 is provided with a connecting post 21321, the connecting post 21321 is used as a sliding part, the connecting post 21321 is confined in the arc-shaped groove 21363, and a guide structure is provided between the outer sleeve 2131 and the inner sleeve 2132 to restrict the circumferential rotation of the inner sleeve 2132. Similar to the above embodiments, the guide structure in Embodiment 3 of this application includes a guide boss 21322 and a guide groove 21312. In addition, the length of the arc-shaped groove 21363 can be set according to the moving stroke of the inner sleeve 2132, and this application does not make special requirements for this. It should be noted that, in addition to the use of the arc groove 21363 and the connecting column 21321 to achieve the conversion between rotation and movement, as those skilled in the art will understand, in other embodiments, it can also be achieved through threaded transmission.

[0106] <Example 4>

[0107] The following mainly describes the differences from Embodiments 1 to 3 above, while the same parts as Embodiments 1 to 3 above can be referred to the above embodiments.

[0108] See Figure 26 In Embodiment 4 of this application, the inner sleeve 2132 can be configured as an integrally molded structure, so that the movable flap 2133 and the connector 2136 are integrally injection molded; wherein, the movable flap 2133 can be a plastic or metal part, and the connector 2136 is an elastic rubber; in Embodiments 2 and 3 above, the movable flap 2133 and the connector 2134 are separately manufactured and then assembled and connected.

[0109] It should be understood that the above description is only a preferred embodiment of the present invention and is not a limitation of the present invention in any form or substance. For example, the above connecting parts are not limited to spring sheets or elastic rubber, but may also be other stretchable structural parts.

[0110] It should be noted that those skilled in the art can make various improvements and additions without departing from the method of this invention, and these improvements and additions should also be considered within the scope of protection of this invention. Any modifications, alterations, and variations made by those skilled in the art without departing from the spirit and scope of this invention, based on the disclosed technical content, are equivalent embodiments of this invention; furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of this invention still fall within the scope of the technical solution of this invention.

Claims

1. A head device for a suction device, characterized in that, The device includes a suction head and a guide structure. The suction head includes an outer tube and at least one inner tube movably inserted into the outer tube, wherein the inner tube can be driven to move relative to the outer tube to adjust the axial length and radial diameter of the suction head. The guide structure is disposed between the inner sleeve and the outer sleeve to restrict the circumferential rotation of the inner sleeve, and the inner sleeve is used to move along the axial direction of the suction head on the guide structure. The inner sleeve includes multiple movable petals arranged sequentially along its circumference. All the movable petals are connected sequentially by connectors to form a ring structure. Any two adjacent movable petals are telescopically connected by the connectors, so that any two adjacent movable petals can move relative to each other radially along the inner sleeve.

2. The head device of the suction device according to claim 1, characterized in that, It also includes a drive component connected to the inner sleeve, which can be driven to move the inner sleeve axially.

3. The head device of the suction device according to claim 2, characterized in that, The driving member drives the inner sleeve to move axially by moving itself, and the suction head also includes an elastic structure. The driving member is connected to the inner sleeve, and the elastic structure is connected to one of the inner sleeve and the driving member. When the driving member drives the inner sleeve to move axially from the distal end to the proximal end, the elastic structure stores elastic potential energy. When the elastic structure releases its elastic potential energy, the inner sleeve moves axially from the proximal end to the distal end under the elastic force of the elastic structure.

4. The head device of the suction device according to claim 3, characterized in that, The driving component is a wire, which is directly connected to the inner sleeve. Alternatively, the driving component includes a wire and a driving tube, which is movably disposed in the outer sleeve and located on the proximal side of the inner sleeve. The wire is directly connected to the driving tube, and the distal end of the driving tube is directly and fixedly connected to the proximal end of the inner sleeve. The elastic structure is disposed between the driving tube and the outer sleeve and is connected to the driving tube.

5. The head device of the suction device according to claim 2, characterized in that, The driving component drives the inner sleeve to move axially by rotating itself. The driving component is a driving tube, which is rotatably disposed in the outer sleeve and located on the proximal side of the inner sleeve. The distal end of the driving tube is movably connected to the proximal end of the inner sleeve. The driving tube is driven to rotate, thereby causing the inner sleeve to move axially.

6. The head device of the suction device according to claim 5, characterized in that, The outer wall of the drive tube is provided with an arc-shaped groove, and the inner wall of the inner sleeve is provided with a sliding part that cooperates with the arc-shaped groove.

7. The head device of the suction device according to claim 1, characterized in that, The connector is an elastic component, and the connector is either separately molded or integrally molded with the movable flap.

8. The head device of the suction device according to claim 7, characterized in that, The guiding structure includes a first guiding part disposed on the outer sleeve and a second guiding part disposed on the inner sleeve. Each movable flap is provided with a second guiding part, and each second guiding part cooperates with a corresponding first guiding part. One of the first guiding part and the second guiding part is a guide groove, and the other is a guide boss. The guide groove and the guide boss are engaged with inclined surfaces.

9. The head device of the suction device according to claim 4 or 5, characterized in that, It also includes a limiting structure, which is used to limit the maximum movement distance of the inner sleeve, and the limiting structure is disposed on the movement path of the inner sleeve.

10. The head device of the suction device according to claim 9, characterized in that, The limiting structure includes a limiting baffle wall disposed on the driving member and a stop surface disposed on the outer sleeve. When the driving tube drives the inner sleeve to move axially, the limiting baffle wall can be blocked by the stop surface and no longer move.

11. The head device of the suction device according to any one of claims 1-10, characterized in that, It also includes a rotating structure, the proximal end of the outer sleeve is fixedly connected to the rotating structure, and the rotating structure can be driven to rotate, thereby causing the suction head to sway.

12. The head device of the suction device according to claim 11, characterized in that, The rotating structure is a snake-bone structure, which is used to rotate under the drive of the transmission wire.

13. The head device of the suction device according to any one of claims 1-10, characterized in that, The suction head has a side suction port; when the inner sleeve is driven to move axially, the fluid flow area corresponding to the side suction port can be increased or decreased.

14. The head device of the suction device according to claim 13, characterized in that, The side suction port includes: a plurality of external fluid ports disposed on the outer sleeve, and a plurality of internal fluid ports disposed on the inner sleeve; the aperture of the external fluid ports is larger than the aperture of the internal fluid ports. When the inner sleeve is driven to retract into the outer sleeve, each of the external fluid ports coincides with a corresponding internal fluid port; When the inner sleeve is driven to extend at least partially from the distal end of the outer sleeve, at least a portion of the external fluid port does not coincide with the internal fluid port.

15. A suction device, comprising a suction device body and a suction device rod, characterized in that, It also includes a head device for the suction device as described in any one of claims 1-14, wherein the suction device body, the suction device rod, and the head device are connected sequentially from the proximal end to the distal end.

16. The suction device according to claim 15, characterized in that, The head device further includes a drive member connected to the inner sleeve, the drive member being rotatable to drive the inner sleeve to move axially, wherein the suction device further includes a rotation transmission mechanism connected to the drive member, the rotation transmission mechanism being used to drive the drive member to rotate.

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