Valve body mechanism and biopsy device for biopsy device

Abstract

This application relates to a valve body mechanism and a biopsy device, including a main valve, a push valve, a retraction valve, a manifold assembly, and a gas storage assembly. The main valve includes a main valve body, a first air inlet, and a first air outlet. The push valve includes a push valve body, a second air inlet, and a second air outlet. The retraction valve includes a retraction valve body, a third air inlet, and a third air outlet. The manifold assembly includes a first pipe connected to the first air outlet, a second pipe connected to the first pipe and the second air inlet, and a third pipe connected to the first pipe and the third air inlet. By providing a first gas storage bladder on the push valve body and a second gas storage bladder on the retraction valve body, carbon dioxide gas can be stored, increasing the capacity of carbon dioxide gas in the push valve and the retraction valve. This results in secondary pressurization when releasing carbon dioxide gas, increasing the instantaneous impact force of the second and third air outlets, thereby improving the driving force of the biopsy device, ensuring sampling effect, and enabling rapid retraction.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a valve body mechanism for a biopsy device and a biopsy device. Background Technology

[0002] Biopsy, or tissue biopsy, is an important method for diagnosing cancerous masses, initial deterioration, and other diseases and disorders in patients. Among existing biopsy techniques, the use of cryogenic biopsy needles to obtain samples from lesions is relatively common. This typically involves using an attached probe with a liquid refrigerant to perform a rotating core biopsy.

[0003] In related technologies, when encountering high-hardness tissues, the impact force released by the push valve may not be sufficient to cut the tissue, affecting the sampling effect, and the retraction force of the pull valve may be insufficient, resulting in a slow retraction speed. Utility Model Content

[0004] Therefore, it is necessary to provide a valve body mechanism and biopsy device for a biopsy device that can increase instantaneous impact force, achieve rapid retraction, and ensure sampling effect.

[0005] A valve body mechanism for a biopsy device includes:

[0006] The main valve includes a main valve body, a first air inlet and a first air outlet. The first air inlet and the first air outlet are connected to the interior of the main valve body. The first air inlet is used to connect to the gas cylinder assembly of the biopsy device.

[0007] A propulsion valve, comprising a propulsion valve body, a second air inlet and a second air outlet, wherein the second air inlet and the second air outlet are connected to the interior of the propulsion valve body;

[0008] A retraction valve, comprising a retraction valve body, a third air inlet, and a third air outlet, wherein the third air inlet and the third air outlet are connected to the interior of the retraction valve body;

[0009] A manifold assembly, comprising a first pipe, a second pipe, and a third pipe, wherein the first pipe is connected to a first air outlet; the second pipe is connected to the first pipe and a second air inlet; the third pipe is connected to the first pipe and the third air inlet; and both the second air outlet and the third air outlet are used to connect to the drive unit of a biopsy device.

[0010] An air storage assembly, comprising a first air storage bladder disposed on the propulsion valve body and / or a second air storage bladder disposed on the retraction valve body, wherein the first air storage bladder is connected to the interior of the propulsion valve body; and the second air storage bladder is connected to the interior of the retraction valve body.

[0011] In one embodiment, a first communication port is provided on the side wall of the propulsion valve body, and the first air storage bag is disposed at the first communication port; the inner diameter of the first air storage bag first increases and then decreases in the direction from near the first communication port to away from the first communication port.

[0012] In one embodiment, a second communication port is provided on the side wall of the retraction valve body, and the second air reservoir is disposed at the second communication port; the inner diameter of the second air reservoir first increases and then decreases in the direction from near the second communication port to away from the second communication port.

[0013] In one embodiment, the propulsion valve further includes a propulsion valve rod and a propulsion valve core. The propulsion valve body includes a first upper chamber and a first lower chamber connected to the first upper chamber. The propulsion valve core is disposed in the first upper chamber, and the propulsion valve rod is movably disposed in the first lower chamber and connected to the propulsion valve core. The first air reservoir and the second air inlet are connected to the first upper chamber. The second air outlet is connected to the first lower chamber.

[0014] Pushing or pulling the push valve rod can drive the push valve core to move axially along the interior of the first upper chamber, thereby controlling the connection or disconnection between the first upper chamber and the first lower chamber.

[0015] In one embodiment, the retraction valve further includes a retraction valve stem and a retraction valve core. The retraction valve body includes a second upper chamber and a second lower chamber communicating with the second upper chamber. The retraction valve core is disposed in the second upper chamber, and the retraction valve stem is movably disposed in the second lower chamber and connected to the retraction valve core. The second air reservoir and the third air inlet are communicating with the second upper chamber. The third air outlet is communicating with the second lower chamber.

[0016] Pushing or pulling the retractable valve stem can cause the retractable valve core to move axially along the interior of the second upper chamber, thereby controlling the connection or disconnection between the second upper chamber and the second lower chamber.

[0017] In one embodiment, the manifold assembly further includes a gas flow structure disposed outside the main valve body, wherein the gas flow structure is provided with a first channel and a second channel connected to the first channel, the first channel being connected to the first pipe; and the second channel being connected to the second pipe and the third pipe.

[0018] In one embodiment, the gas flow structure is further provided with a third channel, which is connected to the second channel; the manifold assembly also includes a fourth pipe, one end of which is connected to the third channel, and the other end of which is used to connect to the biopsy needle of the biopsy device.

[0019] In one embodiment, the main valve further includes a main valve stem and a main valve core. The main valve body includes a third upper chamber and a third lower chamber communicating with the third upper chamber. The main valve core is disposed in the third upper chamber, and the main valve stem is movably disposed in the third lower chamber and connected to the main valve core. The first air inlet is communicating with the third upper chamber. The first air outlet is disposed between the third upper chamber and the third lower chamber.

[0020] Pushing or pulling the main valve stem can drive the main valve core to move axially along the interior of the third upper chamber, thereby controlling the connection or disconnection between the third upper chamber and the third lower chamber.

[0021] In one embodiment, both the push valve core and the pull valve core include a first ball, a second ball, and a compression spring disposed between the first ball and the second ball;

[0022] The first ball of the propulsion valve core can control the connection and disconnection between the second air inlet and the interior of the propulsion valve body, and the second ball of the propulsion valve core can control the connection and disconnection between the second air outlet and the interior of the propulsion valve body.

[0023] The first ball of the retraction valve core can control the connection between the third air inlet and the interior of the retraction valve body, and the second ball of the retraction valve core can control the connection between the third air outlet and the interior of the retraction valve body.

[0024] This application also provides a biopsy device, including a valve body mechanism for a biopsy device as described above.

[0025] In the above scheme, by setting up a first gas reservoir, carbon dioxide gas can be stored to increase the capacity of carbon dioxide gas in the propulsion valve. This creates a secondary pressurization when the carbon dioxide gas is released, thereby increasing the instantaneous impact force of the second outlet and improving the driving force of the biopsy device to ensure the sampling effect. By setting up a second gas reservoir, carbon dioxide gas can be stored to increase the capacity of carbon dioxide gas in the retraction valve. This creates a secondary pressurization when the carbon dioxide gas is released, thereby increasing the instantaneous impact force of the third outlet and enabling rapid retraction. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the biopsy device according to an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the valve body mechanism for a biopsy device according to an embodiment of this application.

[0030] Figure 3 This is a cross-sectional view of the valve body mechanism for a biopsy device according to an embodiment of this application from a first-view perspective.

[0031] Figure 4 This is a cross-sectional view of the valve body mechanism of the biopsy device shown in the first embodiment of this application from a second perspective.

[0032] Figure 5 This is a cross-sectional view of the valve body mechanism for the biopsy device shown in the second embodiment of this application from a second perspective.

[0033] Figure 6 This is a cross-sectional view of the valve body mechanism for the biopsy device shown in the third embodiment of this application from a second perspective.

[0034] Figure 7 This is a cross-sectional view of the valve body mechanism for the biopsy device shown in the fourth embodiment of this application from a second perspective.

[0035] Figure label:

[0036] 10. Valve body mechanism for biopsy device; 100. Main valve; 110. Main valve body; 111. First air inlet; 120. Main valve core; 130. Main valve stem; 140. Third sealing ring; 150. Third valve stem seat; 200. Push valve; 210. Push valve body; 220. Push valve core; 221. First ball; 222. Second ball; 223. Compression spring; 230. Push valve stem; 240. First sealing ring; 250. First valve stem seat; 260. Fourth sealing ring; 300. Retreat valve; 310. 320. Retractable valve body; 330. Retractable valve core; 340. Retractable valve stem; 350. Second sealing ring; 400. Second valve stem seat; 410. Manifold assembly; 420. First pipe; 430. Second pipe; 440. Fourth pipe; 450. Gas flow structure; 500. Second gas reservoir; 600. Valve body drive assembly; 610. Base; 620. First cam; 630. Second cam; 640. Drive block; 20. Biopsy device; 700. Gas tank assembly; 800. Mounting housing. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are 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 this application. However, this application can be implemented 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 this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] Please see Figure 2 , Figure 3 and Figure 4 The embodiments of this application relate to a valve body mechanism 10 for a biopsy device, including a main valve 100, an advance valve 200 and a retraction valve 300.

[0044] The main valve 100 includes a main valve body 110, a first air inlet 111, and a first air outlet. The first air inlet 111 and the first air outlet are internally connected to the main valve body 110. The first air inlet 111 is used to connect to the gas canister assembly 700 of the biopsy device 20. The push valve 200 includes a push valve body 210, a second air inlet, and a second air outlet. The second air inlet and the second air outlet are internally connected to the push valve body 210. The retraction valve 300 includes a retraction valve body 310, a third air inlet, and a third air outlet. The third air inlet and the third air outlet are internally connected to the retraction valve body 310. The gas canister assembly 700 stores carbon dioxide gas.

[0045] The manifold assembly 400 includes a first pipe 410, a second pipe 420, and a third pipe 430. The first pipe 410 is connected to a first air outlet. The second pipe 420 is connected to the first pipe 410 and a second air inlet; the third pipe 430 is connected to the first pipe 410 and a third air inlet. Both the second and third air outlets are used to connect to the drive mechanism of the biopsy device 20.

[0046] Carbon dioxide gas in the gas cylinder assembly 700 can enter the main valve body 110 through the first inlet 111. The carbon dioxide gas inside the main valve body 110 can flow into the first pipe 410 through the first outlet. The carbon dioxide gas in the first pipe 410 can then flow into the push valve body 210 through the second pipe 420 and the second inlet, and subsequently into the retraction valve body 310 through the third pipe 430 and the third inlet. The carbon dioxide gas inside the push valve body 210 can flow into the drive unit of the biopsy device 20 through the second outlet, and the carbon dioxide gas inside the retraction valve body 310 can flow into the drive unit of the biopsy device 20 through the third outlet, providing a power source for the operation of the drive unit.

[0047] The gas storage assembly includes a first gas storage bladder disposed on the propulsion valve body 210 and a second gas storage bladder 500 disposed on the retraction valve body 310. The first gas storage bladder is internally connected to the propulsion valve body 210. The second gas storage bladder 500 is internally connected to the retraction valve body 310.

[0048] Carbon dioxide gas inside the propulsion valve body 210 can enter the first gas storage bladder for storage. By setting the first gas storage bladder, carbon dioxide gas can be stored to increase the capacity of carbon dioxide gas inside the propulsion valve, so that when carbon dioxide gas is released, secondary pressurization is formed, thereby increasing the instantaneous impact force of the second gas outlet, and thus improving the driving force of the biopsy device 20 to ensure the sampling effect.

[0049] The carbon dioxide gas inside the retraction valve body 310 can be stored in the second gas reservoir 500. By setting the second gas reservoir 500, carbon dioxide gas can be stored to increase the capacity of carbon dioxide gas in the retraction valve, so that when the carbon dioxide gas is released, secondary pressurization is formed, thereby increasing the instantaneous impact force of the third outlet and enabling rapid retraction.

[0050] See Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, a first communication port is provided on the side wall of the propulsion valve body 210, and a first air reservoir is disposed at the first communication port. A second communication port is provided on the side wall of the retraction valve body 310, and a second air reservoir 500 is disposed at the second communication port.

[0051] In the first embodiment, the inner diameter of the first air reservoir 500 first increases and then decreases in the direction from near the first communication port to away from the first communication port. The inner diameter of the second air reservoir 500 first increases and then decreases in the direction from near the second communication port to away from the second communication port.

[0052] Specifically, the inner walls of the first and second airbags 500 are generally arc-shaped. It should be noted that this application does not limit the size of the first and second airbags 500; they can be set according to actual usage requirements.

[0053] See Figure 5 In the second embodiment, the first air reservoir is annularly disposed on the outer wall of the propulsion valve body 210, and the first air reservoir has a first annular cavity communicating with the first communication port. The second air reservoir 500 is annularly disposed on the outer wall of the retraction valve body 310, and the second air reservoir 500 has a second annular cavity communicating with the second communication port. In this embodiment, the first air reservoir and the second air reservoir 500 are annular structures.

[0054] See Figure 6 In the third embodiment, the first air reservoir is annularly disposed on the outer wall of the propulsion valve body 210, and the first air reservoir has a first semi-annular cavity communicating with the first communication port. The second air reservoir 500 is annularly disposed on the outer wall of the retraction valve body 310, and the second air reservoir 500 has a second semi-annular cavity communicating with the second communication port. In this embodiment, the first air reservoir and the second air reservoir 500 are semi-annular structures.

[0055] See Figure 7In the fourth embodiment, the first air reservoir is disposed on the outer wall of the propulsion valve body 210, and the first air reservoir has a first rectangular cavity communicating with the first communication port. The second air reservoir 500 is disposed on the outer wall of the retraction valve body 310, and the second air reservoir 500 has a second rectangular cavity communicating with the second communication port. In this embodiment, the first air reservoir and the second air reservoir 500 are rectangular structures and extend axially along the propulsion valve body 210 and the retraction valve body 310.

[0056] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the propulsion valve 200 further includes a propulsion valve stem 230 and a propulsion valve core 220. The propulsion valve body 210 includes a first upper chamber and a first lower chamber communicating with the first upper chamber. The propulsion valve core 220 is disposed in the first upper chamber. The propulsion valve stem 230 is movably disposed in the first lower chamber and connected to the propulsion valve core 220. The first air reservoir and the second air inlet are connected to the first upper chamber. The second air outlet is connected to the first lower chamber.

[0057] Pushing and pulling the valve stem 230 can drive the valve core 220 to move axially along the interior of the first upper chamber, thereby controlling the connection and disconnection between the first upper chamber and the first lower chamber. Specifically, a first connecting hole is provided between the first upper chamber and the first lower chamber, and the valve stem 230 passes through the first connecting hole. A first sealing ring 240 is provided on the side of the first connecting hole near the first upper chamber.

[0058] By pushing and pulling the push valve rod 230, the push valve core 220 can be moved in a direction closer to or further away from the second air inlet, thereby controlling the connection and disconnection between the second air inlet and the inside of the push valve body 210, as well as the connection and disconnection between the first upper chamber and the first lower chamber.

[0059] When the first upper chamber and the first lower chamber are in a connected state, carbon dioxide gas in the first upper chamber can enter the first lower chamber and be released through the second outlet. When the push valve core 220 abuts against the second inlet, the push valve core 220 can block the second inlet. At this time, carbon dioxide gas in the second pipe 420 cannot enter the push valve body 210, and carbon dioxide gas that has entered the push valve body 210 cannot flow back through the second inlet, effectively preventing gas backflow. When the push valve core 220 abuts against the first sealing ring 240, the push valve core 220 can disconnect the first upper chamber and the first lower chamber. At this time, carbon dioxide gas inside the first upper chamber cannot enter the first lower chamber.

[0060] Please see Figure 2 , Figure 3 and Figure 4According to some embodiments of this application, optionally, the retraction valve 300 further includes a retraction valve stem 330 and a retraction valve core 320. The retraction valve body 310 includes a second upper chamber and a second lower chamber communicating with the second upper chamber. The retraction valve core 320 is disposed in the second upper chamber, and the retraction valve stem 330 is movably disposed in the second lower chamber and connected to the retraction valve core 320. The second air reservoir 500 and the third air inlet are connected to the second upper chamber; the third air outlet is connected to the second lower chamber.

[0061] Pushing or pulling the retractable valve stem 330 can drive the retractable valve core 320 to move axially along the interior of the second upper chamber, thereby controlling the connection or disconnection between the second upper chamber and the second lower chamber. Specifically, a second connecting hole is provided between the second upper chamber and the second lower chamber, and the retractable valve stem 330 passes through the second connecting hole. A second sealing ring 340 is provided on the side of the second connecting hole near the second upper chamber.

[0062] By pushing or pulling the retraction valve stem 330, the retraction valve core 320 can be moved in a direction closer to or further away from the third air inlet, thereby controlling the connection and disconnection between the third air inlet and the interior of the retraction valve body 310, as well as the connection and disconnection between the second upper chamber and the second lower chamber.

[0063] When the second upper chamber and the second lower chamber are in a connected state, carbon dioxide gas in the second upper chamber can enter the second lower chamber and be released through the third outlet. When the retraction valve core 320 abuts against the third inlet, the retraction valve core 320 can block the third inlet. At this time, carbon dioxide gas in the third pipe 430 cannot enter the retraction valve body 310, and carbon dioxide gas that has entered the retraction valve body 310 cannot flow back through the second inlet, effectively preventing gas backflow. When the retraction valve core 320 abuts against the second sealing ring 340, the retraction valve core 320 can disconnect the second upper chamber and the second lower chamber. At this time, carbon dioxide gas inside the second upper chamber cannot enter the second lower chamber.

[0064] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the manifold assembly 400 further includes a gas flow structure 450 disposed outside the main valve body 110. The gas flow structure 450 has a first channel and a second channel connected to the first channel. The first channel is connected to a first pipe 410. The second channel is connected to a second pipe 420 and a third pipe 430. Specifically, the second pipe 420 and the third pipe 430 are respectively connected to the two opposite ends of the second channel.

[0065] The gas flow structure 450 also includes a third channel, which is connected to the second channel. The manifold assembly 400 also includes a fourth conduit 440, one end of which is connected to the third channel, and the other end of which is connected to the biopsy needle of the biopsy device 20 to provide carbon dioxide gas to the biopsy needle.

[0066] Specifically, the central axis of the third channel is parallel to the central axis of the first channel, and the central axes of the third channel and the first channel are perpendicular to the central axis of the second channel.

[0067] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the main valve 100 further includes a main valve stem 130 and a main valve core 120, the main valve body 110 includes a third upper chamber and a third lower chamber connected to the third upper chamber, the main valve core 120 is disposed in the third upper chamber, the main valve stem 130 is movably disposed in the third lower chamber and connected to the main valve core 120; the first air inlet 111 is connected to the third upper chamber; the first air outlet is disposed between the third upper chamber and the third lower chamber.

[0068] Pushing or pulling the main valve stem 130 can drive the main valve core 120 to move axially along the interior of the third upper chamber, thereby controlling the connection between the third upper chamber and the third lower chamber. Specifically, a third connecting hole is provided between the third upper chamber and the third lower chamber, and the first air outlet is connected to the third connecting hole. The main valve stem 130 passes through the third connecting hole. A third sealing ring 140 is provided on the side of the third connecting hole near the third upper chamber.

[0069] By pushing or pulling the main valve stem 130, the main valve core 120 can be moved in a direction closer to or further away from the third connection hole, thereby controlling the opening and closing of the third upper chamber and the third lower chamber.

[0070] When there is a gap between the main valve core 120 and the third sealing ring 140, the third upper chamber and the third lower chamber are in a connected state, and the carbon dioxide gas in the third upper chamber can be released through the first outlet. When the main valve core 120 abuts against the third sealing ring 140, the main valve core 120 can disconnect the third upper chamber and the third lower chamber. At this time, the carbon dioxide gas inside the main valve body 110 cannot enter the third lower chamber, and the carbon dioxide gas that has entered the third lower chamber cannot flow back, which can effectively prevent the problem of gas backflow. It should be noted that the first inlet 111 is in a normally open state.

[0071] Please see Figure 2 , Figure 3 and Figure 4According to some embodiments of this application, optionally, both the push valve core 220 and the pull valve core 320 include a first ball 221, a second ball 222 and a compression spring 223 disposed between the first ball 221 and the second ball 222.

[0072] The first ball 221 of the propulsion valve core 220 can control the connection between the second air inlet and the interior of the propulsion valve body 210, and the second ball 222 of the propulsion valve core 220 can control the connection between the second air outlet and the interior of the propulsion valve body 210. Specifically, the first ball 221 can block the second air inlet, and the second ball 222 can block the first connecting hole.

[0073] When carbon dioxide gas enters the second conduit 420 and the second inlet into the propulsion valve body 210, the carbon dioxide gas pushes open the first ball 221 of the propulsion valve core 220, allowing carbon dioxide gas to enter the propulsion valve body 210. When the pressure inside the propulsion valve body 210 reaches equilibrium, the first ball 221 of the propulsion valve core 220 returns to its initial position under the force of the compression spring 223, blocking the second inlet, while the second ball 222 of the propulsion valve core 220 continues to block the first connection hole, thus maintaining a seal for the carbon dioxide gas.

[0074] The first ball 221 of the retraction valve core 320 can control the connection between the third air inlet and the interior of the retraction valve body 310, and the second ball 222 of the retraction valve core 320 can control the connection between the third air outlet and the interior of the retraction valve body 310. Specifically, the first ball 221 can block the third air inlet, and the second ball 222 can block the second connecting hole.

[0075] When carbon dioxide gas enters the retraction valve body 310 through the third pipe 430 and the third air inlet, the carbon dioxide gas can push open the first ball 221 of the retraction valve core 320, allowing carbon dioxide gas to enter the retraction valve body 310. When the pressure inside the retraction valve body 310 reaches equilibrium, the first ball 221 of the retraction valve core 320 returns to its initial position under the force of the compression spring 223, blocking the third air inlet, while the second ball 222 of the retraction valve core 320 continues to block the second connecting hole, thus continuing to seal the carbon dioxide gas.

[0076] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the push valve stem 230 is sealed to the second lower chamber via a first valve stem seat 250, and the retract valve stem 330 is sealed to the third lower chamber via a second valve stem seat 350. The main valve stem 130 is sealed to the third lower chamber via a third valve stem seat 150.

[0077] Specifically, a fourth sealing ring 260 is provided between the first valve stem seat 250 and the push valve body 210, the second valve stem seat 350 and the retraction valve body 310, and the third valve stem seat 150 and the main valve body 110. A fifth sealing ring is provided between the first valve stem seat 250 and the push valve stem 230, the second valve stem seat 350 and the retraction valve stem 330, and the third valve stem seat 150 and the main valve stem 130.

[0078] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the valve body mechanism 10 for the biopsy device 20 further includes a valve body drive assembly 600. The valve body drive assembly 600 includes a base 610, a first cam 620, a second cam 630, and a drive block 640. The base 610 is provided with a sliding groove, and the drive block 640 is slidably connected in the sliding groove. The first cam 620 and the second cam 630 are hinged to the base 610 and are respectively located on both sides of the sliding groove.

[0079] The push valve stem 230 abuts against the first cam 620, and the drive block 640 can push the first cam 620 to rotate, thereby causing the push valve stem 230 to move axially along the interior of the first upper chamber. The retract valve stem 330 abuts against the second cam 630, and the drive block 640 can push the second cam 630 to rotate, thereby causing the retract valve stem 330 to move axially along the interior of the second upper chamber.

[0080] Please see Figure 1 , Figure 2 and Figure 3 This application also provides a biopsy device 20, including a valve body mechanism 10, a gas cylinder assembly 700, a mounting housing 800 and a drive unit as described above. The valve body mechanism and the gas cylinder assembly 700 are both disposed on the mounting housing 800, and the drive unit is installed inside the mounting housing 800.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A valve mechanism for a biopsy device, characterized by include: The main valve includes a main valve body, a first air inlet and a first air outlet. The first air inlet and the first air outlet are connected to the interior of the main valve body. The first air inlet is used to connect to the gas cylinder assembly of the biopsy device. A propulsion valve, comprising a propulsion valve body, a second air inlet and a second air outlet, wherein the second air inlet and the second air outlet are connected to the interior of the propulsion valve body; A retraction valve, comprising a retraction valve body, a third air inlet, and a third air outlet, wherein the third air inlet and the third air outlet are connected to the interior of the retraction valve body; A manifold assembly, comprising a first pipe, a second pipe, and a third pipe, wherein the first pipe is connected to a first air outlet; the second pipe is connected to the first pipe and a second air inlet; the third pipe is connected to the first pipe and the third air inlet; and both the second air outlet and the third air outlet are used to connect to the drive unit of a biopsy device. An air storage assembly, comprising a first air storage bladder disposed on the propulsion valve body and / or a second air storage bladder disposed on the retraction valve body, wherein the first air storage bladder is connected to the interior of the propulsion valve body; and the second air storage bladder is connected to the interior of the retraction valve body.

2. The valve body mechanism for a biopsy device according to claim 1, wherein The side wall of the propulsion valve body is provided with a first communication port, and the first air storage bag is disposed at the first communication port; the inner diameter of the first air storage bag first increases and then decreases in the direction from near the first communication port to away from the first communication port.

3. The valve body mechanism for a biopsy device of claim 1, wherein, A second communication port is provided on the side wall of the retraction valve body, and the second air reservoir is disposed at the second communication port; the inner diameter of the second air reservoir first increases and then decreases in the direction from near the second communication port to away from the second communication port.

4. The valve body mechanism for a biopsy device of claim 1, wherein, The propulsion valve further includes a propulsion valve rod and a propulsion valve core. The propulsion valve body includes a first upper chamber and a first lower chamber connected to the first upper chamber. The propulsion valve core is disposed in the first upper chamber. The propulsion valve rod is movably disposed in the first lower chamber and connected to the propulsion valve core. The first air reservoir and the second air inlet are connected to the first upper chamber. The second air outlet is connected to the first lower chamber. Pushing or pulling the push valve rod can drive the push valve core to move axially along the interior of the first upper chamber, thereby controlling the connection or disconnection between the first upper chamber and the first lower chamber.

5. The valve body mechanism for a biopsy device of claim 1 wherein, The retraction valve further includes a retraction valve stem and a retraction valve core. The retraction valve body includes a second upper chamber and a second lower chamber connected to the second upper chamber. The retraction valve core is disposed in the second upper chamber. The retraction valve stem is movably disposed in the second lower chamber and connected to the retraction valve core. The second air reservoir and the third air inlet are connected to the second upper chamber. The third air outlet is connected to the second lower chamber. Pushing or pulling the retractable valve stem can cause the retractable valve core to move axially along the interior of the second upper chamber, thereby controlling the connection or disconnection between the second upper chamber and the second lower chamber.

6. The valve body mechanism for a biopsy device of claim 1 wherein, The manifold assembly also includes a gas flow structure disposed outside the main valve body. The gas flow structure has a first channel and a second channel connected to the first channel. The first channel is connected to the first pipe, and the second channel is connected to the second pipe and the third pipe.

7. The valve body mechanism for a biopsy device of claim 6, wherein, The gas flow structure is further provided with a third channel, which is connected to the second channel; the manifold assembly also includes a fourth pipe, one end of which is connected to the third channel, and the other end of which is used to connect to the biopsy needle of the biopsy device.

8. The valve body mechanism for a biopsy device of claim 1 wherein, The main valve further includes a main valve stem and a main valve core. The main valve body includes a third upper chamber and a third lower chamber connected to the third upper chamber. The main valve core is disposed in the third upper chamber, and the main valve stem is movably disposed in the third lower chamber and connected to the main valve core. The first air inlet is connected to the third upper chamber. The first air outlet is disposed between the third upper chamber and the third lower chamber. Pushing or pulling the main valve stem can drive the main valve core to move axially along the interior of the third upper chamber, thereby controlling the connection or disconnection between the third upper chamber and the third lower chamber.

9. The valve body mechanism for a biopsy device of claim 1 wherein, Both the push valve core and the retraction valve core include a first ball, a second ball, and a compression spring disposed between the first ball and the second ball; The first ball of the propulsion valve core can control the connection and disconnection between the second air inlet and the interior of the propulsion valve body, and the second ball of the propulsion valve core can control the connection and disconnection between the second air outlet and the interior of the propulsion valve body. The first ball of the retraction valve core can control the connection between the third air inlet and the interior of the retraction valve body, and the second ball of the retraction valve core can control the connection between the third air outlet and the interior of the retraction valve body.

10. A biopsy device characterized by, Includes the valve body mechanism for the biopsy device as described in any one of claims 1 to 9.

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