Polyp retrieval device, filter thereof, and support thereof
Patent Information
- Authority / Receiving Office
- AU · AU
- Patent Type
- Applications
- Current Assignee / Owner
- KING YUEN CHAU
- Filing Date
- 2023-12-28
- Publication Date
- 2026-07-09
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Polyp retrieval device and its filter and stent Technical Field
[0001] The present invention relates to the technical field of medical devices, and in particular to a polyp recovery device and a filter and a bracket thereof. Background Art
[0002] Polyps are abnormal growths of tissue commonly found in the colon, stomach, throat, nasal cavity, ear canal, bladder, and uterus. Doctors need to obtain a biopsy sample, perform a pathological analysis on the sample, and determine whether the polyp is malignant or benign in order to determine whether the polyp should be removed from the patient. Obtaining a biopsy sample is an invasive procedure that requires the use of invasive tools to remove a small amount of polyps from the patient's body as a biopsy sample. The surgical procedure requires the injection of a certain dose of liquid medicine into the lesion site to color-mark the polyp site and control vasoconstriction. The polyp is then removed and aspirated into a polyp recovery device through surgical instruments. During this process, some blood and tissue fluid as well as the liquid medicine will mix with the polyp to form an aspirate. Therefore, the aspirate aspirated into the polyp recovery device is a mixed liquid of multiple substances. The liquid in the container needs to be filtered through the polyp recovery device to filter out the liquid in the aspirate to obtain a qualified biopsy sample that can be used for pathological analysis.
[0003] The existing polyp recovery device includes a bracket and a filter. The bracket has a filtrate cavity for fixing the filter. When the polyps are recovered, they are filtered by the filter so that the polyps are collected in the filter, and the filtered liquid continues to be discharged from the bracket.
[0004] However, when using existing polyp retrieval devices, polyps may rush out of the filter and adhere to the inner wall of the stent, resulting in the loss of some living tissue samples. Insufficient samples will make it impossible for doctors to complete pathological analysis or affect the accuracy of pathological analysis results. Therefore, patients are often required to undergo a second biopsy to obtain new tissue samples, which increases patients' pain and wastes medical resources.
[0005] Application Contents
[0006] The embodiment of the present invention aims to provide a polyp recovery device and its filter and bracket, which can solve the technical problem that polyp recovery devices in the prior art are prone to losing polyp samples.
[0007] The embodiments of the present invention solve the technical problems by adopting the following technical solutions:
[0008] According to a first aspect of the present application, the present application discloses a filter for use in a polyp recovery device, the filter comprising:
[0009] The main body comprises an upper shell and a lower shell that are interlocked, and a receiving cavity for recovering polyps is formed between the upper shell and the lower shell;
[0010] A liquid injection hole is provided in the upper shell for sucking liquid into the accommodating cavity;
[0011] The filtrate mechanism is arranged on the lower shell and is used to filter out the water in the accommodating cavity to filter the polyps.
[0012] The filter disclosed in the embodiment of the present application is used in a polyp recovery device. Since the filter body adopts a structure in which the upper shell and the lower shell are hinged, when the filter is inserted into the stent, the upper shell and the lower shell interlock to form a receiving cavity, which can prevent polyps from splashing out of the filter, thereby preventing the biopsy sample from being discharged from the stent and causing the sample to be lost, ensuring that there are enough samples for doctors to complete pathological analysis, reducing the probability of secondary biopsies, saving patients from unnecessary pain, and saving medical resources. At the same time, the present application prevents polyps from adhering to the inner wall of the stent, thereby eliminating the need to manually collect polyp samples remaining on the inner wall of the stent, and can reduce the difficulty of cleaning the stent, making the use of the device more convenient.
[0013] According to the second aspect of the present application, the present application further discloses a stent for use in a polyp retrieval device, comprising:
[0014] a filtrate cavity for receiving a filter;
[0015] An assembly port is provided on the surface of the bracket and is used for inserting the filter, the assembly port being in communication with the filtrate cavity;
[0016] The flow channel joint includes an injection joint and a discharge joint. The injection joint is used to connect to the injection hole of the filter, and the discharge joint is connected to the filtrate cavity to discharge the liquid in the filtrate cavity.
[0017] The filter is housed in the filtrate cavity of the bracket, and the filter can be inserted or removed through the assembly port. The injection connector of the bracket is connected to the injection hole of the filter to prevent polyps from splashing from the filter's accommodating cavity to the inner wall of the bracket. This eliminates the need for additional cleaning of the bracket's filtrate cavity, making the entire device quicker and more convenient to use.
[0018] According to a third aspect of the present application, a polyp recovery device is disclosed, comprising the aforementioned filter and a holder for securing the filter. When polyps are to be recovered from aspirated fluid, the filter is inserted into the holder, whereupon the filter collects the polyps within the aspirated fluid within a receiving chamber. The fluid removed by the filter is then discharged through a drain connector on the holder. The filter is then removed from the holder, and the polyps within are transferred to a specific container for storage. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0020] FIG1 is a schematic structural diagram of a bracket in an embodiment of the present application;
[0021] FIG2 is a schematic diagram of the structure of a filter in an embodiment of the present application;
[0022] FIG3 is an assembly diagram of a filter in an embodiment of the present application;
[0023] FIG4 is a schematic diagram of the structure of the embodiment of the present application, when the body is in an open state;
[0024] FIG5 is a schematic diagram of the structure of the handle in an embodiment of the present application;
[0025] FIG6 is an assembly diagram of the bracket in an embodiment of the present application;
[0026] FIG7 is a structural diagram of a filter in a closed state in another embodiment of the present application;
[0027] FIG8 is a schematic structural diagram of an adjustment device in another embodiment of the present application;
[0028] FIG9 is a schematic structural diagram of an adjustment device in another embodiment of the present application;
[0029] FIG10 is an assembly diagram of a bracket in another embodiment of the present application.
[0030] Reference numerals and their corresponding meanings: filter 1, body 10, accommodating chamber 100, guide column 101, rotating shaft 102, baffle 103, sealing ring 104, slot 105, groove 106, air hole 107, upper shell 11, upper mounting portion 110, pin 111, expansion buckle 1110, first fixing groove 112, lower shell 12, lower mounting portion 120, sleeve 121, second fixing groove 122, liquid injection hole 13, sink 130, filtrate hole 14, torsion spring 15, first support leg 151, second support leg 152, sealing device 16, piston 160, sealing plug 161, handle 17, first contact surface 171, second contact surface 172, extension portion 173, compression spring 18;
[0031] The bracket 2 , the filtrate chamber 20 , the assembly port 21 , the liquid injection joint 22 , the liquid discharge joint 23 , the sealing interface 24 , the sealing portion 241 , the guide portion 242 , the positioning protrusion 25 , the top plate 26 , and the bottom plate 27 . DETAILED DESCRIPTION
[0032] To facilitate understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more elements can be interposed therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more elements can be interposed therebetween. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc. used in this specification to indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are intended solely for the purpose of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Include" or "comprising" and similar words mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Unless otherwise defined, the features such as "parallel", "perpendicular" and "same" used in the embodiments of the present invention include situations such as "parallel", "perpendicular", "same" in a strict sense, as well as situations such as "approximately parallel", "approximately perpendicular", "approximately the same" that contain a certain error. For example, the above-mentioned "approximately" may mean that the difference between the compared objects is 10% of the average value of the compared objects, or within 5%. When the number of a component or element is not specifically specified below in the embodiments of the present invention, it means that the component or element may be one or more, or may be understood as at least one. "At least one" refers to one or more, and "a plurality" refers to at least two.
[0033] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0034] Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. Obviously, the described embodiments are only a portion of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments derived by persons of ordinary skill in the art without requiring creative effort are also within the scope of protection of the present invention.
[0035] A polyp recovery device disclosed in the present application, as shown in Figures 1 and 2, includes a filter 1 for filtering polyps from aspirated liquid, and a bracket 2 for fixing the filter 1. The bracket 2 is a hollow structure, in which a filtrate cavity 20 for accommodating the filter 1 is formed. The side of the bracket 2 is provided with an assembly port 21 for inserting and removing the filter 1. The bracket 2 is also provided with an injection joint 22 for injecting aspirated liquid into the filter 1, and a discharge joint 23 for discharging the liquid filtered out of the filter 1. The filter 1 includes a main body 10, which includes an upper shell 11 and a lower shell 12 that are interlocked. The upper shell 11 and the lower shell 12 are interlocked to form a accommodating cavity 100 for recovering polyps. The upper shell 11 is provided with an injection hole 13, and the lower shell 12 is provided with a filtration mechanism, wherein the injection hole 13 is used to connect with the injection connector 22. The mixed polyp suction liquid is injected into the accommodating chamber 100 through the injection hole 13. The suction liquid is filtered out of the body 10 through the filtration mechanism, and the filtered water enters the filtrate chamber 20. Finally, the negative pressure pump at the other end of the drainage connector 23 is used to extract the bracket 2, and then the polyp sample in the filter 1 is transferred to the living tissue sample recovery vessel (a designated vessel soaked in liquid medicine), thereby realizing the recovery and preservation of the polyps. In this embodiment, the filtration mechanism is a plurality of filtrate holes 14 provided on the bottom surface of the lower shell 12. In other embodiments of the present application, the filtrate chamber 20 can also be a filter screen fixed to the lower shell 12.
[0036] Since the body 10 of the filter 1 disclosed in this embodiment adopts a structure in which the upper shell 11 and the lower shell 12 are buckled together, when the filter 1 is inserted into the bracket 2, the upper shell 11 and the lower shell 12 are buckled together to form a accommodating cavity 100, which can prevent polyps from splashing out of the filter 1, thereby avoiding the polyps from adhering to the inner wall of the bracket 2, increasing the difficulty of cleaning the bracket 2, and making the use of the device more convenient.
[0037] The body 10 has a first end and a second end along its length. The upper shell 11 and the lower shell 12 are hingedly connected at the first end of the body 10, so that the upper shell 11 and the lower shell 12 can be closed or opened by the hinge. When filtering polyps, as shown in FIG2 , the upper shell 11 and the lower shell 12 are in a snap-fit state, which prevents polyps from splashing onto the inner wall of the filtrate chamber 20 and causing sample loss. When it is necessary to store the recovered polyp sample in a designated biopsy sample storage container, the filter 1 is simply pulled out of the bracket 2. At this time, as shown in FIG4 , the upper shell 11 and the lower shell 12 are in an open state, which facilitates the transfer of the polyps in the lower shell 12 to the designated container.
[0038] Specifically, as shown in Figures 3 and 4, the upper shell 11 and the lower shell 12 are respectively provided with an upper mounting portion 110 and a lower mounting portion 120 at the first end of the body 10, and the upper mounting portion 110 and the lower mounting portion 120 are arranged opposite each other. The upper mounting portion 110 and the lower mounting portion 120 are arranged outside the accommodating cavity 100, so that the accommodating cavity 100 is independently provided, so that the accommodating cavity 100 remains sealed when the upper shell 11 and the lower shell 12 are fastened together. A pin 111 is fixed to the first mounting portion 110, and a shaft sleeve 121 is provided on the lower mounting portion 120. The pin 111 and the shaft sleeve 121 are adapted to each other. In this way, the upper shell 11 and the lower shell 12 are hingedly connected via the pin 111. The root of the pin shaft 111 is fixedly connected to the first mounting portion 110, and the end portion passes through the shaft sleeve 121. The end portion of the pin shaft 111 is provided with an expansion buckle 1110 adapted to the shaft sleeve 121. The expansion buckle 1110 is engaged with the edge of the shaft sleeve 121, thereby preventing the upper shell 11 and the lower shell 12 from separating from each other along the axial direction of the pin shaft 111.
[0039] To facilitate operation, the first end of the body 10 is provided with a first reset member that allows the upper shell 11 and the lower shell 12 to rotate in the opening direction. In this embodiment, the first reset member is a torsion spring 15 provided at the hinged joint between the upper shell 11 and the lower shell 12. The torsion spring 15 is sleeved on the pin 111 and includes a first leg 151 and a second leg 152. The upper mounting portion 110 is provided with a first fixing groove 112 for fixing the first leg 151. The first leg 151 is inserted into the first positioning groove 112, thereby achieving abutment with the inner surface of the upper shell 11. The lower mounting portion 120 is provided with a second fixing groove 122 for fixing the second leg 152. The second leg 152 is inserted into the second fixing groove 122, thereby achieving abutment with the inner surface of the lower shell 12.
[0040] Thus, after the main body 10 has recovered the polyp, as long as the restraining force applied to the main body 10 is removed, the upper shell 11 and the lower shell 12 will automatically open under the action of the torsion spring 15, making it easier to transfer the polyp sample in the accommodating chamber 100 to a specific living tissue sample recovery vessel and also facilitating the cleaning of the filter 1. In addition, if the first leg 151 and the second leg 152 extend into the accommodating chamber 100, it is necessary to provide an additional airtight structure on the inner walls of the upper shell 11 and the lower shell 12 to ensure that the torsion spring 15 does not damage the sealing structure of the accommodating chamber 100. In this embodiment, the upper mounting portion 110 and the lower mounting portion 120 are disposed outside the accommodating chamber 100, which not only does not damage the sealing performance of the accommodating chamber 100 when the main body 10 is fastened, but also reduces the difficulty of processing the upper shell 11 and the lower shell 12, thereby reducing the production cost of the product.
[0041] As shown in Figures 1 and 2, the assembly opening 21 matches the cross-sectional shape of the body 10 in the engaged state, so that when the filter 1 is inserted into the assembly opening 21, the upper shell 11 and the lower shell 12 automatically engage within the assembly opening 21. In this embodiment, the assembly opening 21 is polygonal in shape, and correspondingly, the cross-sectional shape of the body 10 in the engaged state is polygonal and conforms to the assembly opening 21. This ensures that the assembly opening 21 not only automatically engages the body 10 when inserted but also prevents the body 10 from rotating within the assembly opening 21, thus preventing misalignment between the injection hole 13 and the injection connector 22.
[0042] Because the assembly opening 21 matches the cross-section of the body 10, when the first end of the body 10, with the upper and lower shells 11 and 12 already open, is inserted into the assembly opening 21, the upper and lower shells 11 and 12 automatically snap together under the action of the assembly opening 21. Conversely, when the body 10 is removed from the assembly opening 21, the upper and lower shells 11 and 12 automatically open due to the torsion spring 15, as the restraint of the assembly opening 21 is lost. This allows for one-handed operation, significantly facilitating insertion and removal of the body 10.
[0043] In order to prevent the suction liquid from flowing out of the filtrate chamber 20 during operation, the assembly port 21 needs to be kept sealed. To achieve this function, a sealing device 16 is further provided at the second end of the body 10, and the sealing device 16 is adapted to the assembly port 21 to achieve a sealing effect.
[0044] In this embodiment, as shown in FIG3 , the sealing device 16 is a piston 160 disposed at the second end of the body 10. The piston 160 is adapted to the assembly port 21 and acts as a seal when the body 10 is inserted into the assembly port 21. Specifically, a guide post 101 is provided at the second end of the body 10. The base of the guide post 101 is fixedly connected to the outer wall of the lower shell 12, and the end extends in a direction away from the first end of the body 10. The piston 160 is sleeved on the guide post 101 and can slide along the guide post 101. The filter 1 also includes an adjustment device that adjusts the position of the piston 160 on the guide post 101 by controlling the sliding direction of the piston, thereby controlling whether the piston 160 contacts or disengages from the bracket 2.
[0045] When it is necessary to recover the polyp from the aspirated liquid, the main body 10 is pushed into the bracket 2 along the direction of the first end facing the assembly port 21. When the injection hole 13 is facing the injection connector 22, the control adjustment device pushes the piston 160 toward the assembly port 21 so that the piston 160 contacts the bracket 2 to achieve sealing of the assembly port 21.
[0046] As shown in Figures 3 to 5, the adjusting device includes a handle 17 arranged at the end of the guide column 101 away from the main body 10. The handle 17 is movably connected to the guide column 101. The piston 160 is arranged between the handle 17 and the lower shell 12. The sliding direction of the piston 160 is controlled by operating the handle 17, thereby adjusting the relative position of the piston 160 relative to the assembly port 21.
[0047] In this embodiment, the handle 17 is rotatably connected to the guide post 101. The end of the handle 17 facing the piston 160 abuts against the piston 160. By rotating the handle 17, the abutment point on the piston 160 is changed, thereby controlling the sliding direction of the piston 160. The rotation trajectory of the handle 17 has a first position and a second position. When the handle is in the first position, as shown in FIG4, the piston 160 is farthest from the assembly opening 21. When the handle 17 is in the second position, as shown in FIG2 and FIG3, the piston 160 is closest to the assembly opening 21.
[0048] Specifically, as shown in Figures 3 and 5, the guide column 101 is provided with a handle 17, which is rotatably connected to the guide column 101 via a rotating shaft 102. The end of the handle 17 facing the piston 160 is provided with a first contact surface 171 and a second contact surface 172. The first contact surface 171 and the second contact surface 172 are at an angle, and the distance between the rotating shaft 102 and the first contact surface 171 is smaller than the second contact surface 172. When the handle 17 is in the first position, the first contact surface 171 abuts the end surface of the piston 160. When the handle 17 is in the second position, the second contact surface 172 abuts the end surface of the piston 160. Because the distance between the rotating shaft 102 and the first contact surface 171 is smaller than the second contact surface 172, when the handle 171 rotates from the first position to the second position, the piston 160 is pushed toward the assembly port 21 by the handle 17.
[0049] The adjusting device also includes a second return member for providing the restoring force required for the piston 160 to slide toward the handle 17. When the handle 171 rotates from the second position to the first position, the piston 160 is pushed toward the handle 17 by the second return member, that is, the second return member pushes the piston 160 away from the assembly opening. In this embodiment, the second return member is a compression spring 18 disposed between the lower housing 12 and the piston 160. When the handle 171 rotates from the first position to the second position, the first contact surface 171 switches from abutting the piston 160 to abutting the second contact surface 172. At this time, the piston 160 is pushed toward the assembly opening 21 by the handle 17, and the compression spring 18 is in an energy-storing state. When the handle 171 rotates from the second position to the first position, the second contact surface 172 switches from abutting the piston 160 to abutting the first contact surface 171. The piston 160 is pushed toward the handle 17 by the compression spring 18, and the compression spring 18 releases its elastic potential energy.
[0050] Furthermore, as shown in Figures 3 and 5 , the shape of the second contact surface 172 of the handle 17 matches the end surface of the piston 160. In this embodiment, the second contact surface 172 is flat, and the corresponding end surface of the piston 160 is also flat. The positional relationship between the rotating shaft 102 and the second contact surface 172 is configured such that when the handle 17 is rotated to the second position, the second contact surface 172 of the handle 17 aligns with the end surface of the piston 160, and the projection of the rotating shaft 102 in a direction perpendicular to the second contact surface 172 falls on the second contact surface 172. With this structure, when the handle 17 is in the second position, the pressure applied by the piston 160 to the second contact surface 172 passes through the rotating shaft 102, which prevents the handle 17 from rotating on its own under the action of the compression spring 18. Only by actively rotating the handle 17 can the second position be switched to the first position, thus forming a self-locking structure. In this embodiment, the first contact surface 171 and the second contact surface 172 are perpendicular to each other, so the handle 17 must be rotated 90 degrees to switch from the first position to the second position.
[0051] To facilitate insertion of the filter 1 into the holder 2 and prevent accidental rotation of the handle 17 to the second position, in this embodiment, as shown in Figures 2 and 5 , the first contact surface 171 is also configured as a plane that aligns with the end surface of the piston 160. The positional relationship between the first contact surface 171 and the rotating shaft 102 also satisfies the following conditions: when the handle 17 is rotated to the first position, the first contact surface 171 of the handle 17 abuts the end surface of the piston 160, and the projection of the rotating shaft 102 in a direction perpendicular to the first contact surface 171 falls on the first contact surface 171. Thus, when the handle 17 is in the first position, the pressure applied by the piston 160 to the first contact surface 171 also passes through the rotating shaft 102, thus preventing the generation of torque. Consequently, the handle 17 cannot be rotated from the first position to the second position even with a slight touch. Switching from the first position to the second position can only be achieved by actively rotating the handle 17 to overcome the elastic force of the compression spring 18. In this way, when the filter 1 is pushed into the bracket 2 by the handle 17 , the handle 17 will not be easily rotated, thereby preventing accidental touch and facilitating the completion of the insertion action.
[0052] To ensure the sealing of the assembly opening 21, in this embodiment, as shown in Figure 1, the bracket 2 also includes a sealing interface 24 fixed to the assembly opening 21. The sealing interface 24 is adapted to the sealing device to achieve a sealed connection between the two when the filter 1 is inserted into the assembly opening 21. The sealing interface 24 includes an integrally formed sealing portion 241 and a guide portion 242. The sealing portion 241 is located at one end facing the assembly opening 21 and is sealed to the surface of the bracket 2. The guide portion 242 is located at the end facing away from the assembly opening 21. The sealing portion 241 is cylindrical, and its cross-sectional shape matches the piston 160. When the piston 160 is pushed into the sealing portion 241 along the guide post 101, the piston 160 and the inner wall of the sealing portion 241 are tightly fitted to achieve a sealing effect. For ease of processing in this embodiment, the cross-sections of the piston 160 and the sealing portion 241 are both circular. The guide portion 242 is funnel-shaped, with its edges extending in all directions, forming a wide opening with a gradually increasing interface. Because the diameter of piston 160 is slightly larger than the inner diameter of sealing portion 241, an interference fit is ensured between the piston 160 and sealing portion 241, ensuring a tight seal. However, this requires a significant amount of force to directly insert piston 160 into sealing portion 241, making operation more difficult. Guide portion 242, with a wider opening and an inner diameter larger than piston 160, allows piston 160 to slide along the inclined surface of guide portion 242 into sealing portion 241, making it easier to insert filter 1 into bracket 2.
[0053] As shown in Figure 3, a baffle 103 is provided at one end of the guide column 102 adjacent to the lower shell 11. The end of the baffle 103 facing the handle 17 is provided with a groove for securing a compression spring 18. The end surface of the baffle 103 at this end is annular, with an outer diameter smaller than that of the piston 160. The side of the baffle 103 is also provided with a groove 105 for securing a sealing ring 104. The sealing ring 104 is sleeved within the groove 105 and contacts the inner wall of the sealing portion 241, thereby enhancing the sealing performance of the assembly opening 21. When the handle 17 is in the second position, the piston 160 is pressed against the surface of the baffle 103 by the handle 17, providing support for the piston 160 and preventing the edge of the piston 160 from curling and affecting the sealing effect. At the same time, the compression spring 18 abuts against the baffle 103, preventing the compression spring 18 from directly acting on the lower shell 12 and causing damage to the lower shell 12.
[0054] Since the drain connector 23 of the bracket 2 is connected to a negative pressure pump, while the negative pressure pump continuously sucks the liquid in the filtrate chamber 20, the air pressure in the filtrate chamber 20 is lower than the atmospheric pressure. Therefore, due to the pressure difference between the inside and outside of the filtrate chamber 20, it is difficult to overcome the air pressure resistance and pull out the filter 1. To solve this technical problem, in this embodiment, the end face of the baffle 103 is also provided with an air hole 107. When the piston 160 is attached to the surface of the baffle 103, the piston 160 can cover the air hole 107 to maintain the sealing of the bracket 2. When it is necessary to pull out the filter 1, the piston 160 is separated from the baffle 103 under the action of the compression spring 18, so that the filtrate chamber 20 is connected to the atmosphere outside the bracket 2 through the gap between the assembly port 21 and the body 1 and the air hole 107, so that the air pressure inside and outside the filtrate chamber 20 is balanced, which facilitates the extraction of the filter 1 from the bracket 2.
[0055] In this embodiment, as shown in Figure 5, the handle 17 is provided with mutually parallel extensions 173 at the end facing the guide post 101. The rotating shaft 102 is disposed between the two extensions 173 and is fixedly connected to the extensions 173. A groove 106 for securing the rotating shaft 102 is provided at the end of the guide post 101 facing away from the lower shell 1. An opening 107 of the groove 106 faces the baffle 103, and the groove 106 extends from the opening 107 along the axial direction of the guide post 101 away from the lower shell 12. Thus, when the rotating shaft 102 is placed in the groove 106, the piston 160, under the action of the compression spring 18, automatically pushes the rotating shaft 102 into the end of the groove 106 facing away from the lower shell 12, thereby preventing the handle 17 from falling off. This also facilitates product assembly and improves production efficiency.
[0056] In other embodiments of the present application, as shown in FIG6 , a positioning protrusion 25 is provided at the connection between the liquid injection connector 22 and the inner wall of the bracket 2. The positioning protrusion 25 protrudes from the inner wall of the bracket 2 and mates with the liquid injection hole 13 of the filter 1. This allows the positioning protrusion 25 to slide into the liquid injection hole 13 when the filter 1 enters the filtrate chamber 20. The positioning protrusion 25 is annularly arranged around the outlet of the liquid injection connector 22. As shown in FIG7 , a recess 130 is formed at the top of the liquid injection hole 13 to mate with the positioning protrusion 25.
[0057] Thus, when the filter 1 is pushed into the bracket 2, the positioning protrusion 25 cooperates with the liquid injection hole 13 to achieve a positioning effect, ensuring that the liquid injection hole 13 is connected to the liquid injection connector 22. At the same time, when the piston 160 slides along the guide post 101, the positioning protrusion 25 cooperates with the liquid injection hole 13 to fix the body 10, preventing the body 10 from moving under the action of the handle 17 or the compression spring 18, which would cause the liquid injection hole 13 and the liquid injection connector 22 to be misaligned.
[0058] In another embodiment of the present application, as shown in Figure 8, the handle 17 can also be slidably connected to the guide column 101, and the moving direction of the piston 160 can be controlled by sliding the handle 17. When the filter 1 needs to be installed in the bracket 2, the handle 17 is slid toward the assembly port 21, pushing the piston 160 toward the assembly port 21 until the piston 160 is pushed into the sealing portion 241. During this process, the compression spring 18 stores energy. When the polyps are recovered and the filter 1 needs to be extracted to collect the polyps therein, the handle 17 is pulled back in the direction away from the lower shell 12. The compression spring 18 pushes the piston 160 to move synchronously with the handle 17. During this process, the compression spring 18 releases elastic potential energy. A snap structure is also provided on the handle 17. When the handle 17 pushes the piston 160 into the sealing portion 241, the snap structure can lock the handle 17 to prevent the compression spring 18 from pushing the piston 160 out of the sealing portion 241.
[0059] In another embodiment of the present application, as shown in FIG8 , the handle 17 can be slidably connected to the guide post 101 while also being fixedly connected to the piston 160, so that the piston 160 can be moved by sliding the handle 17. In this way, there is no need to provide a compression spring 18 between the piston 160 and the lower housing 12. Instead, the operator can actively pull the handle 17 back in a direction away from the lower housing 12, thereby pulling the piston 160 out of the sealing portion 241.
[0060] In another embodiment of the present application, as shown in FIG9 , the sealing device 16 includes a sealing plug 161 fixed to the second end of the body 10. The sealing plug 161 is fixedly connected to the lower shell 12. When the filter 1 is pushed into the bracket 2 and the liquid injection hole 13 is connected to the liquid injection connector 22, the sealing plug 161 simultaneously enters the sealing portion 241 to seal the assembly port 21. In this embodiment, the insertion and removal of the filter 1 from the bracket 2 are synchronized with the movement of the sealing plug 161 into and out of the sealing portion 241.
[0061] In addition, in an embodiment of the present application, as shown in FIG10 , the injection connector 22 and the drainage connector 23 are arranged on the same side of the outer wall of the bracket 2, wherein the bracket 2 includes a top plate 26 and a bottom plate 27 directly opposite the top plate 27. The drainage connector 23 extends from the outside of the bracket 2 through the top plate 26 into the filtrate chamber 20, and extends from the side where the drainage connector 23 is located to the other side of the filtrate chamber 20, that is, from the top plate 26 to the bottom plate 27. In this way, the liquid in the filtrate chamber 20 can be completely extracted to avoid liquid residue. At the same time, the drainage connector 23 also plays a limiting role. When the injection hole 13 is docked with the injection connector 23, the first end of the body 1 abuts against the drainage connector 23, which limits the insertion depth of the filter 1 and prevents excessive insertion from damaging the equipment.
[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A filter applied to a polyp recovery apparatus, comprising:a body, wherein the body includes an upper shell and a lower shell that are buckled to each other, and an accommodating cavity for recovering polyps is formed between the upper shell and the lower shell;a liquid injection hole formed in the upper shell and used for aspirated liquid to enter the accommodating cavity;a liquid filtration mechanism disposed on the lower shell and used for filtering out moisture inside the accommodating cavity to filter the polyps.
2. The filter applied to a polyp recovery apparatus according to claim 1, wherein the body has a first end and a second end opposite to the first end, and the upper shell and the lower shell are hinged at the first end of the body.
3. The filter applied to a polyp recovery apparatus according to claim 2, wherein the first end of the body is provided with a first reset member for rotating the upper shell relative to the lower shell toward an open state.
4. The filter applied to a polyp recovery apparatus according to claim 3, wherein the first reset member is a torsion spring disposed at a hinge joint between the upper shell and the lower shell, the torsion spring is provided with a first support leg and a second support leg, the upper shell and the lower shell are respectively provided with an upper mounting portion and a lower mounting portion for assembling the torsion spring at the first end of the body, the upper mounting portion is disposed opposite to the lower mounting portion, the first support leg is disposed at the upper mounting portion and abuts against an inner surface of the upper shell, and the second support leg is disposed at the lower mounting portion and abuts against an inner surface of the lower shell.
5. The filter applied to a polyp recovery apparatus according to claim 3, wherein the polyp recovery apparatus includes a stent for fixing the filter, the stent is provided with an assembly port used for allowing the filter to be inserted therein, and the second end of the body is provided with a sealing device for sealing the assembly port.
6. The filter applied to a polyp recovery apparatus according to claim 5, wherein the sealing device includes a sealing plug fitted with the assembly port, and the sealing plug is fixed at the second end of the body.
7. The filter applied to a polyp recovery apparatus according to claim 5, wherein the second end of the body is provided with a guide column, the guide column extends along a direction away from the first end of the body, the sealing device includes a piston slidable along the guide column, and the filter further includes an adjustment device for adjusting relative positions of the piston and the guide column.
8. The filter applied to a polyp recovery apparatus according to claim 7, wherein the adjustment device includes a handle disposed at one end of the guide column away from the body, the piston is located between the handle and the lower shell, and the handle is movably connected to the guide column for adjusting relative positions of the piston and the assembly port by moving the handle.
9. The filter applied to a polyp recovery apparatus according to claim 8, wherein the handle is slidingly connected to the guide column, and the handle is capable of controlling the piston to move along the guide column when sliding along the guide column.
10. The filter applied to a polyp recovery apparatus according to claim 8, wherein the handle is rotationally connected to the guide column, the piston abuts against the handle, the handle has a first station and a second station on a rotation track, and when the handle rotates from the first station to the second station, the handle pushes the piston toward a direction of the main body.
11. The filter applied to a polyp recovery apparatus according to claim 10, wherein the handle and the guide column are rotationally connected through a rotating shaft, one end of the handle opposite to the piston is provided with a first contact face and a second contact face, there is an included angle between the first contact face and the second contact face, a distance between the rotating shaft and the first contact face is smaller than that between the rotating shaft and the second contact face, the first contact face abuts against an end face of the piston when the handle is located at the first station, and the second contact face abuts against the end face of the piston when the handle is located at the second station.
12. The filter applied to a polyp recovery apparatus according to claim 11, wherein the second contact face matches the end face of the piston, and when the handle is located at the second station, a self-locking structure for preventing the handle from rotating is formed at a position of the rotating shaft opposite to the second contact face.
13. The filter applied to a polyp recovery apparatus according to claim 7, wherein one end of the guide column adjacent to the lower shell is further provided with a baffle for preventing the piston from curling.
14. The filter applied to a polyp recovery apparatus according to claim 13, wherein the sealing device further includes a sealing ring, and a side face of the baffle is provided with a clamping slot for fixing the sealing ring.
15. The filter applied to a polyp recovery apparatus according to claim 13, wherein an end face of the baffle is provided with an air vent hole for being in communication with a liquid filtration cavity through the assembly port, and the piston covers the air hole when being fitted with the baffle.
16. The filter applied to a polyp recovery apparatus according to any one of claims 8-15,wherein the adjustment device further includes a second reset member for providing a restoring force for the piston to slide toward a direction of the handle.
17. The filter applied to a polyp recovery apparatus according to claim 16, wherein the second reset member is a compression spring disposed between the piston and the lower shell.
18. A stent applied to a polyp recovery apparatus, comprising:a liquid filtration cavity used for accommodating the filter according to any one of claims 117;an assembly port disposed on a surface of the stent and being in communication with the liquid filtration cavity for allowing the filter to be inserted into the liquid filtration cavity;a flow channel joint comprising a liquid injection joint and a liquid drainage joint, wherein the liquid injection joint is used for being in communication with the liquid injection hole of the filter, and the liquid drainage joint is in communication with the liquid filtration cavity for draining liquid inside the liquid filtration cavity.
19. The stent applied to a polyp recovery apparatus according to claim 18, whereinthe assembly port is fitted with a cross section of the body of the filter when buckled, so that when the filter is inserted into the assembly port, the upper shell and the lower shell are automatically buckled under an action of the assembly port.
20. The stent applied to a polyp recovery apparatus according to claim 18, further comprising a sealing interface fixed to the assembly port, wherein the second end of the filter is provided with a sealing device, and the sealing interface is fitted with the sealing device for achieving a sealed connection between the filter and the assembly port when the filter is inserted into the assembly port.
21. The stent applied to a polyp recovery apparatus according to claim 20, wherein a guide portion extending circumferentially in a funnel shape is provided on one side of the sealing interface away from the assembly port.
22. The stent applied to a polyp recovery apparatus according to claim 18, wherein a positioning protrusion is provided at a connection between the liquid injection joint and an inner wall of the stent, the positioning protrusion protrudes from the inner wall of the stent, and the positioning protrusion is fitted with the liquid injection hole of the filter, so that when the filter enters the liquid filtration cavity, the positioning protrusion slides into the liquid injection hole.
23. A polyp recovery apparatus, comprising:the filter according to any one of claims 1-17;the stent according to any one of claims 18-22.