Automatically stringing electric biopsy needle

Abstract

The application relates to an automatic stringing electric biopsy needle, which comprises a needle seat, a stringing slider (50) and a trigger button; the stringing slider (50) can drive the needle seat to be locked in a stringing position, and the trigger button can be pressed to release the locking of the needle seat in the stringing position; the biopsy needle further comprises a blocking piece (80), which is installed to move along the proximal end direction and the distal end direction of the biopsy needle along with the stringing slider (50); the blocking piece (80) and the trigger button are respectively provided with protruding structures; when the stringing slider (50) is at the proximal end of the movement range, the protruding structure of the blocking piece (80) is opposite to the protruding structure of the trigger button, so that the blocking piece (80) blocks the trigger button from being pressed; when the stringing slider (50) is at the distal end of the movement range, the protruding structure of the blocking piece (80) is staggered with the protruding structure of the trigger button, thereby allowing the trigger button to be pressed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a biopsy needle. Background Technology

[0002] A biopsy is the primary method for obtaining histopathological diagnosis of bone and soft tissue tumors. The biopsy needle is typically used under ultrasound guidance, in conjunction with a biopsy frame. Ultrasound imaging equipment can display the lesion area in real time, guiding the biopsy needle to the target location to perform cytological biopsies, histological biopsies, cyst aspiration, and treatment. It is currently an important tool for disease monitoring and treatment. Ultrasound imaging, as a visual guide, helps doctors insert the biopsy needle near the tumor tissue to be sampled, then activates the needle to remove tissue from the tumor. The biopsy frame helps doctors keep the biopsy needle within the ultrasound plane, ensuring it remains a line on the ultrasound image. Biopsy procedures are divided into lateral incision and cannulation. Lateral incision is less invasive, faster, and safer. Cannulation allows for the extraction of more complete tissue, providing a more comprehensive view of the lesion.

[0003] Current biopsy needle assemblies are typically mounted at the distal end of the biopsy needle. Some prior art biopsy needles include a needle hub within a housing, connected to a spring, one end of which is fixed to the inner housing. During winding, a winding slider moves the needle assembly to the winding position, compressing the spring and locking the needle hub in place, thus maintaining the spring's compression. The winding slider then returns to its original position.

[0004] In the prior art, when the biopsy needle hub is wound up but the winding slider has not yet been reset, if the needle hub is activated, the needle hub may collide with the winding slider, and the resulting impact force can easily damage the winding slider.

[0005] For example, in the biopsy gun disclosed in DE102008413B4, although it achieves the function of separately activating the inner needle and separately activating the outer needle in situ, which can improve the safety of biopsy, the tensioning slider needs to be reset under the action of the reset spring after tensioning. However, during the reset process, if the operator accidentally touches the release button, the released needle seat will move at high speed to the distal end and collide with the tensioning slider that is resetting, causing damage to the slider or needle seat. This is because the release button can still be pressed during the tensioning slider reset, and the prior art does not provide any mechanism to automatically prevent accidental triggering during the reset process. If the activation button is accidentally touched during the winding process, it will directly cause damage to the biopsy needle and make it impossible to continue the operation.

[0006] Meanwhile, in the biopsy gun disclosed in DE102008413B4, if the biopsy site is close to important blood vessels or organs and the in situ stimulation function is suitable for biopsy, the biopsy needle needs to be manually inserted into the biopsy site without being wound to prevent the needle tip from damaging important parts such as blood vessels or organs when the inner needle is automatically stimulated. Then the outer needle is manually wound and stimulated to obtain biopsy tissue. However, if the outer needle is manually wound in the patient's body, the manual winding requires a large amount of hand pressure, which may cause the needle tip to deviate during the winding process. If the needle tip is close to important parts such as blood vessels or organs, there is still a possibility of damaging these important parts.

[0007] Furthermore, the biopsy gun disclosed in DE102008413B4 requires 6-12 firings when used for prostate biopsy surgery. When performing multiple biopsy surgeries consecutively, the constant winding will exhaust the doctor's physical strength, cause hand fatigue, and affect the surgical operation.

[0008] Some biopsy needles use a manually toggle anti-accidental trigger switch to prevent accidental activation. However, this setting requires manual operation by the user after winding, and cannot be locked and unlocked automatically and promptly. In other words, additional user action beyond winding is required to ensure that accidental activation is prevented, rather than relying solely on the winding action itself.

[0009] Meanwhile, in existing technologies, the needle hub of a biopsy needle is typically wound manually. This method is strenuous, difficult to use, and can easily lead to fatigue for doctors after prolonged use. Summary of the Invention

[0010] In view of this, the present invention proposes an automatically windable electric biopsy needle, which can lock and unlock the biopsy needle in a timely and automatic manner, wind it effortlessly by means of electricity, and improve safety.

[0011] The present invention provides the following technical solution: the biopsy needle includes a needle base, a winding slider and an excitation button; the biopsy needle also includes a blocking member, which is installed to move with the winding slider in the proximal and distal directions; when the winding slider is at the proximal end of its range of motion, the blocking member prevents the excitation button from being pressed.

[0012] This implementation incorporates a blocking element that moves with the winding slider. This element prevents the trigger button from being pressed during winding, enabling timely and automatic locking and unlocking of the biopsy needle. Specifically, when the winding slider is at the proximal end (not fully reset), the blocking element automatically blocks the trigger button; when the winding slider is fully reset to the distal end, the blocking element automatically releases, eliminating the need for manual locking and unlocking. This prevents accidental triggering of the needle holder and reduces the risk of damaging the winding slider. This implementation achieves both precise and stable control while allowing for convenient and effortless operation.

[0013] In this embodiment of the invention, the biopsy needle includes a needle seat reset element, a blocking element reset element, and an inner support extending between the proximal and distal ends of the biopsy needle. The needle seat and the upper chord slider are mounted on the inner support and are movable relative to the inner support in the proximal and distal directions. The needle seat reset element is mounted on the inner support to bias the needle seat in the distal direction. The blocking element reset element is mounted on the inner support to bias the blocking element in the proximal direction. When the upper chord slider moves in the proximal direction, it can drive the needle seat to overcome the biasing effect of the needle seat reset element and move in the proximal direction until the upper chord position, locking the needle seat in the upper chord position. When the needle seat is locked in the upper chord position, pressing the trigger button can release the needle seat, release the locking of the needle seat in the upper chord position, and allow the needle seat to move from the upper chord position to the distal direction under the biasing effect of the needle seat reset element. In this embodiment of the invention, the blocking element reset element is a blocking spring. This configuration is simple to implement and economical.

[0014] Optionally, the stop is installed such that when the upper slider is not at the farthest end of its range of motion, the stop prevents the trigger button from being pressed.

[0015] This implementation further eliminates the risk of damaging the upper winding slider by further limiting the timing at which the trigger button can be pressed.

[0016] In this embodiment of the invention, the blocking member and the trigger button each have a protruding structure; when the upper slider is at the near end of its range of motion, the protruding structure of the blocking member is opposite to the protruding structure of the trigger button, preventing the trigger button from being pressed; when the upper slider is at the farthest end of its range of motion, the protruding structure of the blocking member and the protruding structure of the trigger button are offset from each other, allowing the trigger button to be pressed.

[0017] In this embodiment of the invention, the blocking member has a support structure; when the upper slider is at the near end of its range of motion, the support structure of the blocking member is supported on the inner bracket, and the blocking activation button is pressed.

[0018] This method of blocking the trigger button through a mechanical structure of a blocking element is simple and reliable to implement.

[0019] In this embodiment of the invention, the support structure of the blocking member includes two support legs, which are respectively supported on the inner bracket on both sides of the needle seat. Each support leg is connected to the protruding structure of the blocking member through two support columns.

[0020] In this implementation, the support structure is stably supported on the inner bracket, preventing the activation button from being pressed.

[0021] In this embodiment of the invention, the needle holder is mounted on the side near the trigger button relative to the inner support, the blocking member is located between the needle holder and the trigger button, and the upper slider is mounted on the other side relative to the inner support.

[0022] The positional relationship defined by this implementation makes it easy to block the trigger button with a blocking element, and also facilitates the arrangement of various parts around the inner support within the biopsy needle, thereby improving the stability of the biopsy needle.

[0023] In this embodiment of the invention, the movement of the blocking member and the upper chord slider is consistent along the proximal and distal directions of the biopsy needle.

[0024] This implementation ensures timely and automatic locking and unlocking of the biopsy needle's trigger button through a simple, consistent motion relationship.

[0025] Optionally, the blocking member and the upper winding slider are formed as two parts, and the blocking member and the upper winding slider are connected by a transmission member.

[0026] This implementation method facilitates the assembly of biopsy needles.

[0027] Alternatively, the blocking element and the upper spool slider are formed as two separate parts, and the blocking element and the upper spool slider are directly connected.

[0028] This implementation reduces the number of components in the biopsy needle, making it easier to organize industrial production.

[0029] Alternatively, the blocking element and the upper slider are formed as a single component.

[0030] This implementation further reduces the number of components in the biopsy needle.

[0031] Optionally, the biopsy needle includes an electrically operated winding mechanism, which includes a power supply, a motor, a lead screw, a control circuit, a winding button, and a sensor. The motor and power supply are located on the proximal side of the biopsy needle; the power supply powers the motor; the motor is connected to the lead screw to drive its rotation; the lead screw is connected to the winding slider to drive its linear motion; the motor, winding button, and sensor are all electrically connected to the control circuit. When the winding button is pressed, the motor rotates, driving the lead screw to rotate, which in turn drives the winding slider to move proximally; subsequently, when the sensor detects that the needle seat has moved to the nearest point of its range of motion and completed winding, the control circuit manipulates the motor to change the direction of movement of the winding slider, causing it to move distally.

[0032] This implementation adds an electric winding function, replacing manual winding with a lead screw and nut structure, which can automatically reset the winding slider after winding is completed.

[0033] This method of implementation is less strenuous than manual winding, making it easier to operate. Even if doctors use it for a long time, they can maintain their energy and improve the success rate of surgery.

[0034] There is a risk of misoperation during the electric winding process, which may damage the winding slider, causing the winding function to fail and resulting in sampling failure. Protective measures are needed to prevent this risk. The blocking component of this invention addresses this problem precisely, preventing the needle holder from being accidentally triggered and reducing the risk of impact damage to the winding slider.

[0035] In this embodiment of the invention, the motor and power supply are placed on the proximal side of the biopsy needle, adjusting the center of gravity of the biopsy needle toward the user (doctor) and improving the comfort of use.

[0036] In this embodiment of the invention, the power source is a battery.

[0037] In this embodiment of the invention, the sensor is a contact sensor located near the nearest point of the needle holder's range of motion, detecting that the needle holder has reached the cocked position through contact. This setup is simple to implement and economical.

[0038] In this embodiment of the invention, only a single bearing is located at the end of the lead screw furthest from the motor. This arrangement reduces the number of components.

[0039] In a variant of this invention, two bearings are respectively located at both ends of the lead screw. This arrangement increases the strength of the biopsy needle and ensures accuracy.

[0040] Optionally, the biopsy needle includes an adjustment block and an adjustment button. The adjustment block limits the farthest limit of the needle hub's range of motion, and the adjustment button controls the position of the adjustment block.

[0041] This implementation allows for adjustment of the needle insertion distance after the trigger needle seat to suit the actual needs of different patients.

[0042] Optionally, the needle holder includes an outer needle holder and an inner needle holder, both mounted on an inner support and movable relative to the inner support in the proximal and distal directions; the needle holder reset element includes an outer needle holder reset element and an inner needle holder reset element, both mounted on the inner support, the outer needle holder reset element biasing the outer needle holder distally, and the inner needle holder reset element biasing the inner needle holder distally; the trigger button includes a first trigger button and a second trigger button, when the upper winding slider is not at the farthest end of its movement range, the blocking member prevents the first and second trigger buttons from being pressed; when the outer needle holder is not locked in the upper winding position... The movement of the upper winding slider towards the proximal end only drives the outer needle seat to move, but not the inner needle seat. When the outer needle seat is locked in the upper winding position, the movement of the upper winding slider towards the proximal end can drive the inner needle seat to move. When both the outer and inner needle seats are locked in the upper winding position, pressing the first trigger button can first release the inner needle seat and unlock it in the upper winding position, and then automatically release the outer needle seat and unlock it in the upper winding position. When both the outer and inner needle seats are locked in the upper winding position, pressing the second trigger button can only release the inner needle seat and unlock it in the upper winding position, but does not automatically release the outer needle seat and unlock it in the upper winding position.

[0043] This implementation allows for easy and continuous activation of the commonly used inner and outer needle linkage via the first activation button, that is, the inner needle seat is released first, followed by the automatic release of the outer needle seat.

[0044] This implementation also allows for easy implementation of commonly used in-situ excitation functions by combining the second excitation button and the first excitation button, i.e., exciting the inner needle seat separately and then exciting the outer needle seat separately.

[0045] When performing in-situ excitation, the inner needle seat is excited first, and then the outer needle seat is excited separately after the position is adjusted. This ensures that the sampling site does not shift, and the sampling is more accurate.

[0046] When there are dangerous areas such as vital organs, nerves, and blood vessels near the sampling area, the needle tip can be manually controlled to puncture and avoid the dangerous areas. Then, the external needle hub can be individually activated to complete the biopsy and cutting, which can effectively reduce the surgical risks near dangerous areas.

[0047] In-situ excitation of the inner and outer needles has a relatively large time interval, resulting in less vibration compared to continuous excitation of the inner and outer needles.

[0048] In this embodiment of the invention, the inner needle seat reset element is an inner needle seat spring, and the outer needle seat reset element is an outer needle seat spring. This configuration is simple to implement and economical.

[0049] Alternatively, the needle hub spring can be fitted onto a guide, such as a guide rod, which is mounted on the inner support in a proximal-to-distal direction. This implementation helps control the movement of the needle hub spring and the needle hub, preventing excessive movement in directions other than proximal and distal, which could impact or damage the biopsy needle components.

[0050] Alternatively, a guide for the needle hub spring can be omitted. This implementation helps reduce the overall weight of the biopsy needle and improves user (doctor) comfort.

[0051] Optionally, the biopsy needle includes an indicator element for indicating whether the outer and inner needle hubs have been wound.

[0052] This implementation method allows users (doctors) to check the winding status of the outer and inner needle hubs, avoiding the possibility of incorrect operation.

[0053] In a variant of the invention, the indicator element is used to display the battery's operating status or the connection status with a power source.

[0054] According to the technical solution of the present invention, the biopsy needle has an automatic anti-false triggering structure. By adding a blocking component, it automatically prevents the excitation button from being pressed during the winding process. The biopsy needle has an electric winding function, which saves effort during operation. It also has functions such as inner and outer needle linkage and in-situ excitation, which can simplify operation and prevent risks. The biopsy needle of the present invention can lock and unlock the biopsy needle in a timely and automatic manner, avoid false triggering of the biopsy needle, prevent damage to components, and can be wound electrically in a labor-saving manner, thereby improving safety. Attached Figure Description

[0055] For illustrative and not limiting purposes, the invention will now be described with reference to preferred embodiments thereof, and in particular the accompanying drawings.

[0056] Figure 1 This is an external schematic diagram of the biopsy needle according to an embodiment of the present invention.

[0057] Figure 2 This is a schematic diagram of a biopsy needle according to an embodiment of the present invention, wherein the upper shell is removed to expose the internal components.

[0058] Figure 3 This is a partial cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein the inner needle seat has been locked in the upper chord position.

[0059] Figure 4 This is a partial cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein both the outer needle seat and the inner needle seat have been locked in the chord position.

[0060] Figure 5This is a schematic diagram of the biopsy needle according to an embodiment of the present invention, viewed from the back, wherein the lower housing has been removed to expose the internal components.

[0061] Figure 6 This is an exploded view of the biopsy needle according to an embodiment of the present invention.

[0062] Figure 7 This is a cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein neither the outer needle seat nor the inner needle seat is fully wound, the first contact surface of the slider is in contact with the contact surface of the outer needle seat, while the second contact surface of the slider is not in contact with the contact surface of the inner needle seat.

[0063] Figure 8 This is a schematic diagram of the upper housing and blocking member of the biopsy needle according to an embodiment of the present invention.

[0064] Figure 9 This is a schematic diagram showing the assembly state of the upper winding slider, blocking spring, blocking member, and transfer member of the biopsy needle according to an embodiment of the present invention.

[0065] Figure 10 This is a schematic diagram of the biopsy needle according to an embodiment of the present invention, viewed from the rear, wherein the lower housing is removed, exposing the upper slider at the farthest end of its range of motion.

[0066] Figure 11 This is a cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein the upper chord slider is at the farthest end of its range of motion, and the blocking member allows the excitation button to be pressed.

[0067] Figure 12 This is a schematic diagram of the biopsy needle according to an embodiment of the present invention, viewed from the rear, wherein the lower housing is removed, exposing the upper chord slider at the farthest point of its range of motion.

[0068] Figure 13 This is a cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein the upper chord slider is not at the farthest end of its range of motion, and the blocking member does not allow the activation button to be pressed.

[0069] Figure 14 This is a bottom view of the adjustment block of the biopsy needle according to an embodiment of the present invention.

[0070] Figure 15 This is a schematic diagram of the cooperation between the adjustment block and the needle hub of the biopsy needle according to an embodiment of the present invention, wherein the position of the adjustment block is such that it does not obstruct the movement of the needle hub to the distal end.

[0071] Figure 16 This is a schematic diagram of the cooperation between the adjustment block and the needle hub of the biopsy needle according to an embodiment of the present invention, wherein the position of the adjustment block is such that it blocks the movement of the needle hub to the distal end.

[0072] Figure 17This is a schematic diagram showing the torsional deformation that occurs when the upper chord slider of the biopsy needle in the embodiment of the present invention comes into contact with the outer needle seat.

[0073] In the attached diagram: Inner support 11; Upper housing 12; Lower housing 13; Outer needle seat 20; Outer needle seat spring 21; Outer needle seat contact surface 22; Outer needle seat activation point 23; Inner needle seat 30; Inner needle seat spring 31; Inner needle seat contact surface 32; Inner needle seat activation point 33; Inner needle seat gasket 34; Adjusting block 40; Adjusting button 41; Adjusting block gasket 42; Upper winding slider 50; Blocking spring 51; Slider first contact surface 52; Slider second contact surface 53; First activation button 60; First activation button activation. Point 61; First contact point of the first trigger button; 62; Second contact point of the first trigger button; 63; Second trigger button; 70; Trigger point of the second trigger button; 72; Contact point of the second trigger button; 80; First contact point of the blocking component; 81; Second contact point of the blocking component; 82; Third contact point of the blocking component; 83; Transmitter; 84; Motor; 91; Lead screw; 92; Bearing; 93; Nut; 94; Winding button; 95; Control circuit board; 96; Battery module; 97; Contact sensor; 98; Indicating element; 99. Detailed Implementation

[0074] In this embodiment of the invention, the biopsy needle has an automatic anti-accidental triggering structure. The following is a detailed explanation, where "up," "down," "left," and "right" refer to the perspective shown in the diagram. Furthermore, according to medical device conventions, "distal" refers to the end of the biopsy needle that is furthest from the user (doctor) during normal use; "proximal" refers to the end of the biopsy needle that is closest to the user (doctor) during normal use; "front" refers to the side of the biopsy needle that is convenient for the user (doctor) to observe and operate during normal use; and "back" refers to the side of the biopsy needle opposite to the front.

[0075] Now we will combine Figure 1 , Figure 2 The overall structure of the biopsy needle according to the embodiments of the present invention will be explained.

[0076] Figure 1 This is an external schematic diagram of the biopsy needle according to an embodiment of the present invention. Figure 1 As shown, the biopsy needle includes an upper housing 12 disposed on the front and a lower housing 13 disposed on the back. The upper housing 12 and the lower housing 13 are either connected to each other or both are connected to the inner support 11 (see [reference]). Figure 2 This creates a space to accommodate the components of the biopsy needle. The upper housing 12 is equipped with a winding button 95, a setting button 41, a first activation button 60, and a second activation button 70. These buttons can be operated by the user (doctor) from the outside of the biopsy needle, such as by pressing it inward or moving it laterally.

[0077] The biopsy needle also includes a battery as an internal power source, with the battery module 97 located on the proximal side of the biopsy needle.

[0078] In a variant of the invention not shown, the biopsy needle does not include a battery, but instead includes wires on the proximal side for connecting to an external power source.

[0079] Figure 1 The front of the biopsy needle is also shown to have an indicator element 99, which will be described in detail later.

[0080] Figure 2 This is a schematic diagram of a biopsy needle according to an embodiment of the present invention, wherein the upper housing 12 has been removed, exposing the internal components. Figure 2 As shown, the biopsy needle includes an inner support 11 extending between the proximal and distal ends to support components of the biopsy needle mounted thereon.

[0081] Both the outer needle holder 20 and the inner needle holder 30 are mounted on the inner support 11 and are movable relative to the inner support 11 in the proximal and distal directions, respectively. The outer needle holder 20 and the inner needle holder 30 are mounted on one side of the front of the inner support 11, that is, on the side near the upper housing 12, the first trigger button 60, and the second trigger button 70. As is known in the art, the outer needle holder 20 is used to connect the outer needle, and the inner needle holder 30 is used to connect the inner needle, but the relative positional relationship between the outer needle holder 20 and the inner needle holder 30 is not limited. The connection methods between the outer needle holder 20, the inner needle holder 30, the outer needle, and the inner needle are known in the art and are not described in detail in this application. Figure 2 In this diagram, the outer needle hub 20 is positioned on the right side, and the inner needle hub 30 is positioned on the left side. However, this is merely illustrative and not restrictive. The positions can be reversed, with the outer needle hub 20 on the left and the inner needle hub 30 on the right, without affecting their function. Later, it will be mentioned that the positions of certain components of the biopsy needle are determined by the positions of the outer needle hub 20 and the inner needle hub 30. In this case, the positions of the relevant components will be described as "the side closer to the outer needle hub 20" and "the side closer to the inner needle hub 30" (rather than the left and right sides of the biopsy needle).

[0082] Both the outer needle seat spring 21 and the inner needle seat spring 31 are arranged in a proximal-to-distal direction, with their proximal ends mounted on the inner bracket 11. The outer needle seat spring 21 and the inner needle seat spring 31 are mounted on one side of the front relative to the inner bracket 11, that is, on the side near the upper housing 12, the first actuation button 60, and the second actuation button 70. Preferably, these springs can be fitted onto a guide, such as a guide rod, which is mounted on the inner bracket 11 in a proximal-to-distal direction. Alternatively, no guide for these springs is provided.

[0083] The distal end of the outer needle seat spring 21 abuts against the outer needle seat 20, causing the outer needle seat 20 to be biased distally. The distal end of the inner needle seat spring 31 abuts against the inner needle seat 30, causing the inner needle seat 30 to be biased distally. When the outer needle seat 20 moves proximally against the biasing action of the outer needle seat spring 21 until it reaches the wound position, the outer needle seat 20 is locked in the wound position. When the inner needle seat 30 moves proximally against the biasing action of the inner needle seat spring 31 until it reaches the wound position, the inner needle seat 30 is locked in the wound position.

[0084] Specifically, on the back side of the upper housing 12 (the side facing the inside of the biopsy needle), upper housing locking structures are provided on the side near the outer needle seat 20 and the side near the inner needle seat 30. The outer needle seat 20 has an outer needle seat elastic plate facing forward. One end of the outer needle seat elastic plate (preferably the proximal end) is connected to the outer needle seat 20, and the free end of the other end is biased towards the front due to elasticity. The outer needle seat elastic plate has an outer needle seat locking structure. Similarly, the inner needle seat 30 has an inner needle seat elastic plate facing forward. One end of the inner needle seat elastic plate (preferably the proximal end) is connected to the inner needle seat 30, and the free end of the other end is biased towards the front due to elasticity. The inner needle seat elastic plate has an inner needle seat locking structure. When the outer needle seat 20 or the inner needle seat 30 moves to its chord position, its locking structure can cooperate with the upper housing locking structure to lock the outer needle seat 20 or the inner needle seat 30. The aforementioned locking structure is, for example, a locking hook.

[0085] Adjustment block 40 is mounted on the upper housing 12. Adjustment block 40 limits the farthest limit of the needle holder's range of motion. That is, the range of motion of the needle holder is limited between the chord position in the proximal direction and the position defined by adjustment block 40 in the distal direction.

[0086] Advantageously, the position of the adjustment block 40 is adjustable. By changing the position of the adjustment block 40, the furthest limit of the needle hub's range of motion can be adjusted, allowing the same biopsy needle to easily adapt to different surgical needs. Specifically, in this embodiment of the invention, the adjustment button 41 can control the position of the adjustment block 40.

[0087] More specifically, see Figure 6 and Figure 8 As shown more clearly, the gear shift block 40 and the gear shift button 41 are connected by mutually cooperating protruding and recessed structures. The upper housing 12 has a through hole, for example, in the shape of a cross groove, at the location where the gear shift button 41 is located, so that the cooperating structures can pass through. The transverse groove of the cross groove allows the gear shift button 41 to move left and right in a direction perpendicular to the proximal and distal directions.

[0088] See Figure 14As shown, a protruding structure exists on the back of the adjusting block 40. When the adjusting block 40 moves left and right, the protruding structure moves between a position that blocks the needle seat and a position that does not block the needle seat. See also Figure 15 As shown, when the needle holder's movement towards the distal end is unobstructed, its maximum range of motion is relatively large. See also Figure 16 As shown, when the movement of the needle seat to the distal end is blocked by the protruding structure of the adjusting block 40, the maximum limit of its movement range is relatively small.

[0089] Figure 2 The biopsy needle also includes a blocking element 80, which will be described in detail later.

[0090] Now we will combine Figure 3 , Figure 4 This invention will explain the specific structure, function, and role of the first activation button 60 and the second activation button 70 of the biopsy needle in the embodiments of the present invention.

[0091] On the back of the first trigger button 60, near the outer needle seat 20, a first trigger button trigger point 61 is formed. On the back of the second trigger button 70, near the inner needle seat 30, a second trigger button trigger point 71 is formed, which advantageously protrudes towards the back.

[0092] An adjustment block pad 42 is formed on the side of the adjustment block 40 near the outer needle seat 20 (but not near the inner needle seat 30), in the proximal direction. Compared to the outer needle seat 20, the adjustment block pad 42 is closer to the front of the biopsy needle, and more specifically, closer to the first trigger button 60 arranged on the upper housing 12.

[0093] An inner needle seat pad 34 is formed on the inner needle seat 30. The inner needle seat pad 34 extends toward one side of the outer needle seat 20 and is closer to the front of the biopsy needle than the outer needle seat 20. However, the inner needle seat pad 34 is not closer to the front of the biopsy needle than the adjusting block pad 42.

[0094] An inner needle seat activation point 33 is formed at the free end of the inner needle seat elastic sheet (see above, the end not connected to the inner needle seat 30), and an outer needle seat activation point 23 is formed at the free end of the outer needle seat elastic sheet (see above, the end not connected to the outer needle seat 20).

[0095] Figure 3 This is a partial cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein the inner needle seat 30 has been locked in the chord position. Figure 3As shown, when the inner needle seat 30 is locked in the upper spool position, the second trigger button trigger point 71 of the second trigger button 70 is opposite to the inner needle seat trigger point 33 of the inner needle seat 30. At this time, pressing the second trigger button 70 allows the second trigger button trigger point 71 to directly press the inner needle seat trigger point 33. Since both the inner needle seat trigger point 33 and the inner needle seat locking structure are located on the inner needle seat elastic sheet, this pressing causes the inner needle seat elastic sheet to move downward as a whole, disengaging the inner needle seat locking structure from the corresponding upper housing locking structure, releasing the inner needle seat 30, releasing the inner needle seat 30 from the upper spool position, and allowing the inner needle seat 30 to move from the upper spool position to the distal end under the biasing action of the inner needle seat spring 31. Since the inner needle seat activation point 33 is formed on the free end of the inner needle seat elastic sheet, the inner needle seat activation point 33, the inner needle seat locking structure, and the inner needle seat elastic sheet are connected to the inner needle seat 30. These three form a lever relationship, which allows the inner needle seat locking structure to disengage from the corresponding upper shell locking structure at the inner needle seat activation point 33 with little effort.

[0096] The second trigger button 70 has a stepped portion on the side near the inner needle seat 30, the shape and position of which match the first trigger button 60. With the aid of this stepped portion, a portion of the first trigger button 60 presses against the second trigger button 70. Pressing the first trigger button 60 indirectly actuates the second trigger button 70, similarly releasing the inner needle seat 30, disengaging it from its wound position, and allowing the inner needle seat 30 to move distally from the wound position under the biasing action of the inner needle seat spring 31. Advantageously, this stepped portion directly faces the trigger point 71 of the second trigger button, thereby simplifying the structure and reducing effort.

[0097] Figure 4 This is a partial cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein both the outer needle seat 20 and the inner needle seat 30 have been locked in the chord position. Figure 4 As shown, when the outer needle seat 20 is locked in the wound position, the first trigger button 61 of the first trigger button 60, the adjusting block pad 42, and the outer needle seat trigger point 23 of the outer needle seat 20 are opposite each other. However, when the inner needle seat 30 is locked in the wound position, the inner needle seat pad 34 has moved to the proximal direction (to the right in the figure) and is not located between the adjusting block pad 42 and the outer needle seat trigger point 23, resulting in a gap between the adjusting block pad 42 and the outer needle seat trigger point 23. Even if the first trigger button 61 presses the adjusting block pad 42, it cannot press the outer needle seat trigger point 23. Therefore, in this state where both the outer needle seat 20 and the inner needle seat 30 are locked in the wound position, the first trigger button 60 cannot be used to first release the outer needle seat 20 from the wound position.

[0098] If in Figure 4In this state, the user (doctor) first releases the inner needle seat 30, which moves distally (to the left in the figure). The inner needle seat pad 34 inserts between the adjustment block pad 42 and the outer needle seat activation point 23, thereby filling the gap that originally existed between the adjustment block pad 42 and the outer needle seat activation point 23, acting as a bridge or intermediary to transmit the user's (doctor's) pressure. If the user (doctor) releases the inner needle seat 30 by pressing the second activation button 70, then after the movement of the inner needle seat 30 ends, the user (doctor) can press the first activation button 60 to make the first activation button activation point 61 press the adjustment block pad 42, then press the inner needle seat pad 34, and then press the outer needle seat activation point 23. Since the outer needle seat activation point 23 and the outer needle seat locking structure are both located on the outer needle seat elastic sheet, such pressing causes the outer needle seat elastic sheet to move downward as a whole, the outer needle seat locking structure disengages from the corresponding upper shell locking structure, releases the outer needle seat 20, releases the outer needle seat 20 from the upper chord position, and causes the outer needle seat 20 to move from the upper chord position to the far end under the biasing action of the outer needle seat spring 21. If the user (doctor) releases the inner needle seat 30 by pressing the first activation button 60, after the inner needle seat 30 finishes moving, the inner needle seat pad 34 will be inserted between the outer needle seat activation point 23 and the adjustment block pad 42 that has been pressed by the first activation button activation point 61. The inner needle seat pad 34 will be automatically pressed by the adjustment block pad 42 and then press the outer needle seat activation point 23. Similarly, the outer needle seat 20 will be released by the action of the outer needle seat elastic plate and the outer needle seat locking structure, and the outer needle seat 20 will be released from the upper winding position. Under the biasing action of the outer needle seat spring 21, the outer needle seat 20 will move from the upper winding position to the distal end. Since the outer needle seat activation point 23 is formed on the free end of the outer needle seat elastic sheet, the outer needle seat activation point 23, the outer needle seat locking structure, and the outer needle seat elastic sheet are connected to the outer needle seat 20. These three form a lever relationship, which allows the outer needle seat locking structure to disengage from the corresponding upper shell locking structure at the outer needle seat activation point 23 with little effort.

[0099] In other words, a special activation method is achieved through the specific structural design of the first activation button 60, the second activation button 70, the adjustment block 40, the inner needle seat 30, and the outer needle seat 20. When only the inner needle seat 30 is locked in the wound position, pressing either the first activation button 60 or the second activation button 70 will release the inner needle seat 30. When only the outer needle seat 20 is locked in the wound position, pressing the first activation button 60 will release the outer needle seat 20, but pressing the second activation button 70 will not release it. When both the outer needle seat 20 and the inner needle seat 30 are locked in the wound position, pressing the second activation button 70 will only release the inner needle seat 30, but will not release the outer needle seat 20. When both the outer needle seat 20 and the inner needle seat 30 are locked in the wound position, pressing the first activation button 60 will first release the inner needle seat 30, and then automatically release the outer needle seat 20, achieving linkage between the inner and outer needles.

[0100] This implementation allows for easy and continuous activation of the commonly used inner and outer needle linkage via the first activation button 60, that is, the inner needle seat 30 is released first, followed by the automatic release of the outer needle seat 20.

[0101] This implementation also allows for easy implementation of commonly used in-situ excitation functions by combining the second excitation button 70 and the first excitation button 60, i.e., exciting the inner needle seat 30 separately and then exciting the outer needle seat 20 separately.

[0102] When performing in-situ excitation, the inner needle seat 30 is excited separately first, and then the outer needle seat 20 is excited separately after the position is adjusted. This ensures that the sampling site does not shift and the sampling is more accurate.

[0103] When there are dangerous areas such as important organs, nerves, and blood vessels near the sampling area, the needle tip can be manually controlled to puncture and avoid the dangerous areas. Then, the outer needle hub 20 can be individually activated to complete the biopsy cutting, which can effectively reduce the surgical risk near dangerous areas.

[0104] In-situ excitation of the inner and outer needles has a relatively large time interval, resulting in less vibration compared to continuous excitation of the inner and outer needles.

[0105] Now we will combine Figure 5 , Figure 6 This invention will explain the structure, function, and role of each component of the electric winding mechanism of the biopsy needle according to an embodiment of the present invention.

[0106] Figure 5 This is a schematic diagram of the biopsy needle according to an embodiment of the present invention, viewed from the rear, wherein the lower housing 13 has been removed, exposing the internal components. Figure 5 and Figure 6As shown, the biopsy needle includes an upper chord slider 50, a lead screw 92, a bearing 93, a nut 94, and a motor 91, all mounted on an inner support 11. The upper chord slider 50 is movable proximally and distally relative to the inner support 11. The bearing 93, mounted on the inner support 11, supports the lead screw 92 and allows it to rotate within the biopsy needle. The thread of the lead screw 92 engages with the nut 94. The upper chord slider 50 has a longitudinal through-hole, larger than the lead screw 92, allowing it to pass through. However, the longitudinal through-hole is smaller than the nut 94. The upper chord slider 50 also has a transverse through-hole, larger than the nut 94, allowing it to pass through. During assembly, the nut 94 is first inserted through the transverse through-hole of the upper chord slider 50, then the lead screw 92 is inserted through the longitudinal through-hole, and finally, the lead screw 92 engages with the nut 94 via its thread. After assembly, the lead screw 92 passes through the longitudinal through-hole into the upper chord slider 50, and the nut 94 is engaged in the transverse through-hole of the upper chord slider 50, ensuring that the nut 94 and the upper chord slider 50 move in the same longitudinal direction. After assembly, the longitudinal direction corresponds to the proximal and distal directions of the biopsy needle. The motor 91, located on the proximal side of the biopsy needle and powered by a battery (or an external power source not shown), drives the lead screw 92 to rotate. Because the transverse through-hole of the upper chord slider 50 restricts the rotation of the nut 94, the nut 94 moves linearly, subsequently driving the upper chord slider 50 to move in the proximal and distal directions through the transverse through-hole.

[0107] In this embodiment of the invention, only a single bearing 93 is provided at the end of the lead screw 92 that is away from the motor 91.

[0108] In a variant of the invention not shown, two bearings are respectively located at both ends of the lead screw.

[0109] Figure 6 This is an exploded view of the biopsy needle according to an embodiment of the present invention. Figure 6 As shown, the biopsy needle includes a blocking spring 51, which will be discussed later. Figure 9 Let me explain it in detail.

[0110] The biopsy needle also includes a control circuit and a sensor mounted on a control circuit board 96. The control circuit is electrically connected to a motor 91, a winding button 95, and the sensor. When the winding button 95 is pressed, the control circuit receives a command, causing the motor 91 to rotate and drive the lead screw 92 to rotate, which in turn drives the winding slider 50 to move proximally, and further drives the needle seat to overcome the biasing effect of the needle seat spring and move proximally (this will be discussed in detail later). Figure 7(To be explained in detail); Subsequently, when the sensor detects that the needle holder has moved to the closest point of its movement range and completed winding, the controller manipulates the motor 91 to automatically change the movement direction of the winding slider 50, causing the winding slider 50 to move towards the farthest point. When the sensor detects that the needle holder has moved to the farthest point of its movement range, the motor 91 stops driving the lead screw 92 to rotate.

[0111] Figure 6 The diagram shows a contact sensor 98 located near the nearest end of the needle holder's range of motion, which detects by contact that the needle holder has reached the wound position. A sensor detecting the needle holder's movement to the far end is located on the back of the control circuit board 96, not on the control board. Figure 6 As shown in the image.

[0112] In other words, by controlling the circuit, motor 91, winding button 95, and sensor settings, motor 91 can wind the needle holder and automatically reset the winding slider 50.

[0113] This method of implementation is less strenuous than manual winding, making it easier to operate. Even if doctors use it for a long time, they can maintain their energy and improve the success rate of surgery.

[0114] In this embodiment of the invention, the indicator element 99 displays whether the outer needle seat 20 and the inner needle seat 30 have completed winding.

[0115] Preferably, the indicator element 99 is an indicator light connected to the control circuit and a battery (or an external power source not shown), which displays whether the outer needle holder 20 and the inner needle holder 30 have completed winding based on the sensor's detection results.

[0116] In variations of the invention not shown, additionally or alternatively, the indicator element displays the battery's operating status or the connection status with a power source.

[0117] In a variant of the invention not shown, the indicating element is independent of electronic devices and mechanically indicates whether the outer and inner needle seats are wound.

[0118] Figure 6 The biopsy needle also includes a delivery element 84, which will be described in detail later.

[0119] Now we will combine Figure 7 This will illustrate the specific cooperation between the outer needle seat 20, the inner needle seat 30, and the upper string slider 50 of the biopsy needle in the embodiments of the present invention.

[0120] Figure 7 This is a cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein neither the outer needle seat 20 nor the inner needle seat 30 is fully wound, the first contact surface 52 of the slider is in contact with the contact surface 22 of the outer needle seat, while the second contact surface 53 of the slider is not in contact with the contact surface 32 of the inner needle seat. Figure 7As shown, the part of the upper chord slider 50 that mates with the needle seat is a slender fork shape. The middle section of the fork is further narrowed and thinned, and it is elastic. The end of the fork forms two beveled structures in the proximal direction of the biopsy needle (upper part of the figure), namely the first contact surface 52 and the second contact surface 53 of the slider. The outer needle seat 20 and the inner needle seat 30 respectively form beveled structures that mate with the upper chord slider 50, namely the outer needle seat contact surface 22 and the inner needle seat contact surface 32.

[0121] In this embodiment of the invention, when neither the outer needle seat 20 nor the inner needle seat 30 has been wound, the angled structure of the outer needle seat 20 extends further toward the distal end of the biopsy needle (lower in the figure) than the angled structure of the inner needle seat 30. Therefore, during the winding process, when the winding slider 50 moves from the distal end to the proximal end, the first contact surface 52 of the slider first contacts the contact surface 22 of the outer needle seat, while the second contact surface 53 of the slider does not contact the contact surface 32 of the inner needle seat.

[0122] In a variant of the invention not shown, when neither the outer nor the inner needle seat is fully wound, the beveled structures of the outer and inner needle seats extend as far as the distal end of the biopsy needle, while the beveled structure of the two winding slider that mates with the outer needle seat extends further than the proximal end of the biopsy needle, thus ensuring that the first contact surface of the slider contacts the contact surface of the outer needle seat first during the winding process.

[0123] In a variant of the invention not shown, when neither the outer nor the inner needle seat is fully wound, the beveled structure of the outer needle seat extends further toward the distal end of the biopsy needle than the beveled structure of the inner needle seat, and the beveled structure of the two beveled structures of the winding slider that mates with the outer needle seat extends further toward the proximal end of the biopsy needle, so that during the winding process, the first contact surface of the slider contacts the contact surface of the outer needle seat first.

[0124] As mentioned above Figure 5 , Figure 6 In this embodiment of the invention, the outer needle seat spring 21 and the inner needle seat spring 31 are preferably sleeved on the guide member to limit their lateral displacement. See also... Figure 17 When neither the outer needle seat 20 nor the inner needle seat 30 is fully wound, during the winding process, the first contact surface 52 of the slider first contacts the contact surface 22 of the outer needle seat. Under the action of the angled structure, the movement of the winding slider 50 from the far end to the near end will cause the winding slider 50 to twist and shift towards the outer needle seat 20, causing the winding slider 50 and the inner needle seat 30 to be misaligned in the left-right direction as shown in the figure, and they can no longer make contact. The narrowing and thinning of the forked middle section of the winding slider 50 is conducive to this torsional deformation. Therefore, when neither the outer needle seat 20 nor the inner needle seat 30 is wound, the first movement of the winding slider 50 towards the near end can only drive the outer needle seat 20 to wind.

[0125] After the outer needle seat 20 is wound, the upper winding slider 50 moves towards the distal end under the drive of the lead screw 92 and disengages from the outer needle seat 20. At this time, due to the elasticity of the forked middle section of the upper winding slider 50, the deformation of the upper winding slider 50 is restored, and the upper winding slider 50 returns from the state of torsional offset to the central position.

[0126] After the outer needle seat 20 is wound, due to the change in the position of the outer needle seat 20, when the winding slider 50 moves towards the proximal end, the second contact surface 53 of the slider first contacts the contact surface 32 of the inner needle seat, while the first contact surface 52 of the slider does not contact the contact surface 22 of the outer needle seat. Therefore, the winding slider 50 can drive the inner needle seat 30 to be wound. At this time, under the action of the angled structure, the movement of the winding slider 50 from the distal end to the proximal end will cause the winding slider 50 to twist and shift towards the inner needle seat 30.

[0127] In other words, through the cooperation between the outer needle seat 20, the inner needle seat 30, and the upper winding slider 50, when neither the outer needle seat 20 nor the inner needle seat 30 has completed winding, the first movement of the upper winding slider 50 will only drive the outer needle seat 20 to wind, and only the subsequent movement of the upper winding slider 50 will drive the inner needle seat 30 to wind.

[0128] Now we will combine Figures 8 to 13 This will be used to explain the specific structure, function, and role of the blocking member 80 and the transfer member 84 of the biopsy needle in the embodiments of the present invention.

[0129] Figure 8 This is a schematic diagram of the upper housing 12 and the blocking member 80 of the biopsy needle according to an embodiment of the present invention. Figure 8 As shown, the blocking member 80 has a raised structure, specifically forming a first contact point 81, a second contact point 82, and a third contact point 83. Looking at the upper housing 12 from the inside out of the biopsy needle, the first activation button 60 has a raised structure, specifically forming a first contact point 62 and a second contact point 63. The second activation button 70 has a raised structure, specifically forming a second activation button contact point 72. When the blocking member 80 moves to a specific position, the first contact point 81, the second contact point 82, and the third contact point 83 of the blocking member are respectively opposite to the first contact point 62, the second contact point 63, and the second contact point 72 of the first activation button. If the user (doctor) attempts to press the first activation button 60 or the second activation button 70, the blocking member 80 prevents the first activation button 60 and the second activation button 70 from being pressed.

[0130] Figure 9 This is a schematic diagram showing the assembly state of the biopsy needle's upper winding slider 50, blocking spring 51, blocking member 80, and transfer member 84 according to an embodiment of the present invention. Figure 9 As shown, the blocking element 80 is mounted on one side of the front relative to the inner support 11, that is, on the side near the upper housing 12, the first activation button 60, and the second activation button 70, and is located between the needle seat and the activation button. The upper winding slider 50 and the blocking element spring 51 are mounted on the other side relative to the inner support 11. The blocking element 80 is connected to the transmission element 84. The blocking element spring 51 is arranged in a proximal-to-distal direction, with one end mounted on the inner support 11 and the other end abutting against the transmission element 84, causing the transmission element 84 and the blocking element 80 to be biased in the proximal direction. Conversely, the upper winding slider 50 abuts against the transmission element 84 in the distal direction. Thanks to this bias-abutting structure, when the lead screw 92 is working normally, the movement of the blocking element 80 and the upper winding slider 50 in the proximal and distal directions of the biopsy needle is consistent; while when the lead screw 92 is not working normally, the blocking element spring 51 causes the blocking element 80 to be biased in the proximal direction, and as described in detail later, the activation button is blocked.

[0131] In a variant of the invention not shown, no transmission element is provided; instead, the blocking element is directly abutted against the upper chord slider in the distal direction. One end of the blocking spring 51 near the proximal end directly abuts against the blocking element 80, causing the blocking element 80 to be biased in the proximal direction.

[0132] In a variant of the invention not shown, the blocking element and the upper slider are formed as a single component.

[0133] The blocking member 80 has a support structure including two support feet on either side of the needle seat and the needle seat spring. Each support foot is connected to the protruding structure of the blocking member 80 via two support posts to provide support. When the upper winding slider 50 is at the proximal end of its range of motion, the support structure of the blocking member 80 is supported on the inner bracket 11, and the protruding structure of the blocking member 80 is opposite to the protruding structures of the first trigger button 60 and the second trigger button 70, preventing the trigger button from being pressed. When the upper winding slider 50 is at the proximal end of its range of motion, the protruding structure of the blocking member 80 is opposite to the protruding structures of the first trigger button 60 and the second trigger button 70, preventing the trigger button from being pressed. When the upper winding slider 50 is at the farthest end of its range of motion, the protruding structure of the blocking member 80 is offset from the protruding structures of the first trigger button 60 and the second trigger button 70, allowing the trigger button to be pressed.

[0134] In variations of the invention not shown, the protruding structures of the blocking member, the first trigger button, and the second trigger button are formed as other numbers of contact points or other shapes of protruding structures.

[0135] Preferably, when the upper slider 50 is not at the farthest end of its range of motion, the protruding structure of the blocking member 80 is opposite to the protruding structure of the first trigger button 60 and the second trigger button 70, and the trigger button is pressed.

[0136] Figure 10 This is a schematic diagram of the biopsy needle according to an embodiment of the present invention, viewed from the rear, wherein the lower housing 13 is removed, exposing the upper chord slider 50 at the farthest end of its range of motion. Figure 11 This is a cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein the upper chord slider 50 is at the farthest end of its range of motion, and the blocking member 80 allows the activation button to be pressed. Figure 10 and Figure 11 As shown, the upper slider 50 is at the farthest end of its range of motion. The transmission member 84 causes the blocking member 80 to move a sufficient distance relative to the inner support 11 in the far direction. The protruding structure of the blocking member 80 is offset from the protruding structures of the first trigger button 60 and the second trigger button 70, allowing the trigger button to be pressed.

[0137] Figure 12 This is a schematic diagram of the biopsy needle according to an embodiment of the present invention, viewed from the rear, wherein the lower housing 13 is removed, exposing the upper chord slider 50 at the farthest end of its range of motion. Figure 13 This is a cross-sectional schematic diagram of the biopsy needle according to an embodiment of the present invention, wherein the upper chord slider 50 is not at the farthest end of its range of motion, and the blocking member 80 prevents the activation button from being pressed. Figure 12 and Figure 13 As shown, the upper slider 50 is not at the farthest end of its range of motion, so that the blocking member 80 does not move a sufficient distance to the far end relative to the inner support 11. The protruding structure of the blocking member 80 is opposite to the protruding structure of the first trigger button 60 and the second trigger button 70, and the trigger button is blocked from being pressed.

[0138] In other words, through the synchronous movement between the blocking member 80 and the upper winding slider 50, when the upper winding slider 50 is at the near end of its movement range, the blocking member 80 will block the trigger button and prevent the trigger button from being pressed.

[0139] There is a risk of misoperation during the electric winding process, which may damage the winding slider 50, causing the winding function to fail and sampling to fail. Protective measures are needed to prevent this risk. The blocking member 80 of this invention addresses this problem precisely, preventing the needle holder from being accidentally triggered and reducing the risk of impact damage to the winding slider 50.

[0140] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A biopsy needle, characterized in that, The biopsy needle includes a needle hub, a winding slider (50), and an activation button; the winding slider (50) can lock the needle hub in the winding position, and pressing the activation button can release the needle hub from the winding position. The biopsy needle further includes a blocking member (80) mounted to move along the proximal and distal directions of the biopsy needle with the upper winding slider (50); the blocking member (80) and the activation button each have a protruding structure; when the upper winding slider (50) is at the proximal end of its range of motion, the protruding structure of the blocking member (80) is opposite to the protruding structure of the activation button, so that the blocking member (80) prevents the activation button from being pressed; when the upper winding slider (50) is at the distal end of its range of motion, the protruding structure of the blocking member (80) is offset from the protruding structure of the activation button, thereby allowing the activation button to be pressed. The biopsy needle includes an inner support (11) extending between a proximal and a distal end. The needle hub and the upper winding slider (50) are mounted on the inner support (11) and are movable relative to the inner support (11) in the proximal and distal directions. The blocking member (80) has a support structure. When the upper winding slider (50) is at the proximal end of its range of motion, the support structure of the blocking member (80) supports the inner support (11), preventing the activation button from being pressed. The needle hub includes an outer needle hub (20) and an inner needle hub (30), both of which are mounted on the inner support (11) and are capable of moving proximally and distally relative to the inner support (11). The biopsy needle includes an outer needle hub reset element and an inner needle hub reset element, both of which are mounted on the inner support (11). The outer needle hub reset element biases the outer needle hub (20) distally, and the inner needle hub reset element biases the inner needle hub (30) distally. The activation button includes a first activation button (60) and a second activation button (70). When the upper slider (50) is not at the farthest point of its range of motion, the blocking member (80) prevents the first activation button (60) and the second activation button (70) from being pressed. When the outer needle seat (20) is not locked in the upper winding position, the movement of the upper winding slider (50) in the proximal direction only drives the outer needle seat (20) to move, but cannot drive the inner needle seat (30) to move; when the outer needle seat (20) is locked in the upper winding position, the movement of the upper winding slider (50) in the proximal direction can drive the inner needle seat (30) to move; When both the outer needle seat (20) and the inner needle seat (30) are locked in the upper winding position, pressing the first trigger button (60) can first release the inner needle seat (30) and release the inner needle seat (30) from the upper winding position, and then automatically release the outer needle seat (20) and release the outer needle seat (20) from the upper winding position. When both the outer needle seat (20) and the inner needle seat (30) are locked in the upper winding position, pressing the second trigger button (70) can only release the inner needle seat (30) and unlock the inner needle seat (30) in the upper winding position; After the inner needle seat (30) is released, the outer needle seat (20) can be released separately by pressing the first trigger button (60).

2. The biopsy needle according to claim 1, characterized in that, The blocking member (80) is installed such that when the upper slider (50) is not at the farthest end of its range of motion, the blocking member (80) prevents the trigger button from being pressed.

3. The biopsy needle according to claim 1, characterized in that, The support structure of the blocking member (80) includes two support legs, which are respectively supported on the inner bracket (11) on both sides of the needle seat. Each support leg is connected to the protruding structure of the blocking member (80) through two support columns.

4. The biopsy needle according to claim 1, characterized in that, The needle holder is mounted on one side near the trigger button relative to the inner bracket (11), the upper winding slider (50) is mounted on the other side relative to the inner bracket (11), and the blocking member (80) is located between the needle holder and the trigger button.

5. The biopsy needle according to claim 1, characterized in that, The movement of the blocking member (80) and the upper chord slider (50) along the proximal and distal directions of the biopsy needle is consistent.

6. The biopsy needle according to claim 1, characterized in that, The blocking member (80) and the upper chord slider (50) are formed as a single component; or as two directly connected components; or as two components connected by a transmission member (84).

7. The biopsy needle according to claim 1, characterized in that, The biopsy needle includes an electrically operated winding mechanism, which comprises a power supply, a motor (91), a lead screw (92), a control circuit, a winding button (95), and a sensor, wherein: The motor (91) and the power supply are located on the proximal side of the biopsy needle; The power source supplies power to the motor (91); The motor (91) is connected to the lead screw (92) and is used to drive the lead screw (92) to rotate; The lead screw (92) is connected to the upper chord slider (50) to drive the upper chord slider (50) to achieve linear motion; The motor (91), the winding button (95), and the sensor are all electrically connected to the control circuit. When the winding button (95) is pressed, the motor (91) rotates and drives the lead screw (92) to rotate, thereby driving the winding slider (50) to move towards the proximal end. Subsequently, when the sensor detects that the needle seat has moved to the nearest end of its movement range and completed winding, the control circuit controls the motor (91) to change the movement direction of the winding slider (50) and make the winding slider (50) move towards the distal end.

8. The biopsy needle according to claim 1, characterized in that, The biopsy needle includes a setting block (40) and a setting button (41). The setting block (40) limits the farthest limit of the range of motion of the needle hub, and the setting button (41) controls the position of the setting block (40).

9. The biopsy needle according to claim 1, characterized in that, The biopsy needle includes an indicator element (99) for indicating whether the outer needle seat (20) and the inner needle seat (30) are wound.

10. The biopsy needle according to claim 1, characterized in that, The inner needle seat reset element is an inner needle seat spring (31), and the outer needle seat reset element is an outer needle seat spring (21).

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