Locking device and biopsy needle

Abstract

The invention provides a locking device and a biopsy needle, and relates to the technical field of medical instruments. The locking device comprises a fixed lock structure, a core rod and a mistaken touch prevention structure, the fixing lock structure comprises a moving part and a button, the moving part is in sliding connection with the core rod in the axial direction of the core rod, the button is installed on the moving part, a locking part is arranged on the button, and the locking part is used for being connected with any position of the core rod to limit sliding of the moving part on the core rod. The button is used for driving the locking part to move when being pressed, so that the locking part is separated from the core rod; the button is provided with an extending part exposed out of the moving part, the mistaken touch prevention structure is arranged on one side of the extending part and can move relative to the extending part, and the mistaken touch prevention structure is used for moving close to the extending part so as to abut against and limit the extending part to limit movement of the button or moving away from the extending part so as to separate the extending part. According to the locking device, the movement of the button can be limited by moving the mistaken touch prevention structure to abut against the extension part of the button for limiting, so that the movement of the fixed lock structure caused by mistaken touch of the button is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a locking device and a biopsy needle. Background Art

[0002] A biopsy needle is a medical device used for puncture sampling. It typically consists of a handle and a core rod. One end of the core rod is inserted into the handle, and the core rod is equipped with a locking mechanism for locking the insertion depth. To use the biopsy needle, the locking mechanism must be adjusted to the desired insertion depth. The locking mechanism is then locked in place to lock the insertion depth, and the needle can then be manually removed by pushing it through the handle.

[0003] Because the biopsy needle's fixed lock uses a screw, the unlocking and locking process, as well as the movement of the lock on the core rod, requires two hands to operate, making it inconvenient. Therefore, one existing biopsy needle uses a press-type fixed lock. Specifically, this press-type fixed lock includes a collar that fits over the core rod and a button that is slidably connected to the collar. A return spring is provided between the button and the collar, and the button is provided with a snap-on protrusion. The outer wall of the core rod is provided with multiple tooth grooves distributed along its length. When the button is pressed, the snap-on protrusion withdraws from the tooth groove, and the fixed lock can be moved on the core rod by pushing the button. When the button is released, the return spring pushes the button back to its original position, causing the snap-on protrusion to snap into the tooth groove where it was located, thereby fixing the fixed lock on the core rod.

[0004] Although the unlocking, fixing and moving processes of the push-type fixing lock can be completed by one-handed operation, it is easy to accidentally touch the button on the fixing lock when operating with one hand, causing the fixing lock to move and the puncture positioning to fail. Summary of the Invention

[0005] The purpose of the present invention is to provide a locking device and a biopsy needle to alleviate the technical problem in the prior art that when operating the push-type fixed lock in the biopsy needle with a single-handed grip, it is easy to accidentally touch the button on the fixed lock, causing the fixed lock to move and the puncture positioning to fail.

[0006] In a first aspect, the present invention provides a locking device comprising a fixed lock structure, a core rod, and an anti-accidental touch structure;

[0007] The fixed lock structure includes a moving member and a button, wherein the moving member is slidably connected to the core rod along the axial direction of the core rod, the button is mounted on the moving member and is provided with a locking portion, the locking portion is used to be connected to any position of the core rod to restrict the moving member from sliding on the core rod, and the button is used to drive the locking portion to move when pressed to separate the locking portion from the core rod;

[0008] The button has an extension portion exposed outside the moving part, and the anti-accidental touch structure is arranged on one side of the extension portion and can move relative to the extension portion. The anti-accidental touch structure is used to abut and limit the extension portion when moving close to the extension portion to limit the movement of the button, and to separate from the extension portion when moving away from the extension portion.

[0009] In an optional embodiment, the anti-accidental-touch structure is movably mounted on the moving member, and the anti-accidental-touch structure is used to move on the moving member relative to the protruding portion to abut against or separate from the protruding portion.

[0010] In an optional embodiment, the anti-accidental touch structure is slidably connected to the moving part along the circumference of the core rod, and the anti-accidental touch structure is used to abut against or separate from the protruding portion during the sliding process on the moving part.

[0011] In an optional embodiment, an abutment portion is provided at the side of the anti-accidental-touch structure close to the protruding portion, and a limiting hole is provided on the side wall of the protruding portion. The abutment portion is used to extend into the limiting hole when the anti-accidental-touch structure moves close to the protruding portion, so as to abut and limit the protruding portion.

[0012] In an optional embodiment, a first limiting structure is provided between the anti-accidental touch structure and the movable part, the first limiting structure including a first limiting groove and a first limiting protrusion, one of the first limiting groove and the first limiting protrusion is provided on the anti-accidental touch structure, and the other is provided on the movable part, the first limiting protrusion is used to be clamped in the first limiting groove when the anti-accidental touch structure abuts against the protruding part to limit the position.

[0013] In an optional embodiment, a handle shell is further included, which is sleeved outside the core rod and located on one side of the movable part. The anti-accidental touch structure is movably installed on the handle shell, and the anti-accidental touch structure is used to move on the handle shell relative to the protruding part to abut against or separate from the protruding part.

[0014] In an optional embodiment, an extension portion is provided on a side of the protruding portion close to the handle housing, and a limiting gap is provided between the extension portion and the handle housing along the radial direction of the handle housing. The anti-accidental touch structure is used to extend into or exit from the limiting gap during the movement of the handle housing relative to the protruding portion.

[0015] In an optional embodiment, the anti-accidental-touch structure is mounted on the handle housing along the circumferential rotation of the handle housing, and the anti-accidental-touch structure is used to extend into or exit from the limit interval during the rotation on the handle housing.

[0016] In an optional embodiment, the anti-accidental touch structure includes a first sleeve and a limiter, the first sleeve is sleeved on the outside of the handle housing, the limiter is fixed to the side of the first sleeve close to the fixed lock structure, and the first sleeve is used to drive the limiter to rotate on the handle housing so that the limiter extends into the limit interval or exits from the limit interval.

[0017] In an optional embodiment, the anti-accidental-touch structure is slidingly and / or rollingly connected to the handle shell, and the anti-accidental-touch structure can move axially on the handle shell along the handle shell to extend into the limit interval or exit from the limit interval.

[0018] In an optional embodiment, the anti-accidental touch structure includes a second socket, which is sleeved on the outside of the handle shell, and a limiting portion is formed at a position of the second socket close to the fixed lock structure. The second socket is used to move axially on the handle shell so that its limiting portion extends into the limiting interval or exits from the limiting interval.

[0019] In an optional embodiment, the anti-accidental touch structure is a limiting ring, which is sleeved on the outside of the handle shell. The limiting ring is used to move axially along the handle shell on the handle shell to extend into the limiting interval or exit from the limiting interval.

[0020] In an optional embodiment, a second limiting structure is provided between the anti-accidental touch structure and the handle shell, and the second limiting structure includes a second limiting groove and a second limiting protrusion, one of the second limiting groove and the second limiting protrusion is provided on the anti-accidental touch structure, and the other is provided on the handle shell, and the second limiting protrusion is used to be clamped in the second limiting groove when the anti-accidental touch structure extends into the limiting interval.

[0021] In a second aspect, the present invention provides a biopsy needle comprising the locking device according to any one of the aforementioned embodiments.

[0022] The locking device provided by the present invention includes a fixed lock structure, a core rod and an anti-accidental touch structure; the fixed lock structure includes a moving part and a button, the moving part is slidably connected to the core rod along the axial direction of the core rod, the button is installed on the moving part and is provided with a locking part on the button, the locking part is used to connect with any position of the core rod to limit the sliding of the moving part on the core rod, and the button is used to drive the locking part to move when pressed to separate the locking part from the core rod; the button has an extension exposed outside the moving part, the anti-accidental touch structure is provided on one side of the extension and can move relative to the extension, the anti-accidental touch structure is used to abut against the extension when moving close to the extension to limit the movement of the button, and to separate from the extension when moving away from the extension. The locking device provided by the present invention is applied to medical devices with a push-type fixed lock, such as biopsy needles, and the push-type fixed lock is the fixed lock structure in the locking device. Taking the biopsy needle as an example, the fixed lock structure is used to adjust the insertion depth of the biopsy needle and fix the adjusted insertion depth. In the process of adjusting the insertion depth, you can first press the button to separate the locking part from the core rod, and then move the button on the core rod while pressing the button. Since the button is installed on the moving part, the moving part will be driven to move on the core rod when the button is moved, thereby adjusting the insertion depth of the biopsy needle. When the moving part is moved to the desired insertion depth, the button is released and the locking part is connected to the core rod. At this time, the position of the moving part on the core rod is fixed by the locking part, and the insertion depth of the biopsy needle can be kept fixed. It can be seen that the above-mentioned process of unlocking the fixed lock structure and adjusting the insertion depth can be achieved by pressing and moving the button with one hand. Therefore, the locking device provided by the present invention can still ensure the one-handed operation of the push-type fixed lock. On this basis, the locking device provided by the present invention provides an anti-accidental touch structure on one side of the extension of the button that can move relative to the extension. When the needle insertion depth does not need to be adjusted, the anti-accidental touch structure can be moved close to the extension until the anti-accidental touch structure and the extension abut against each other along the button movement direction. At this time, the anti-accidental touch structure can abut against the extension to prevent the button from moving. Even if the button is accidentally touched when operating the fixed lock structure with one hand, the button will not move, thereby not causing the fixed lock structure to be mislocked, effectively preventing the failure of the biopsy needle's puncture positioning. When the needle insertion depth needs to be adjusted, the anti-accidental touch structure can be moved in the opposite direction to move the anti-accidental touch structure away from the extension of the button. When the anti-accidental touch structure is separated from the extension, the extension is no longer restricted by the anti-accidental touch structure, the button can be pressed and moved, and the fixed lock structure can also be unlocked.

[0023] Compared with the prior art, the locking device provided by the present invention can limit the movement of the button by moving the anti-accidental touch structure to abutment with the extended part of the button, thereby effectively preventing the fixed lock structure from being unlocked due to the button being accidentally touched, and can effectively ensure the success of puncture positioning.

[0024] The present invention provides a biopsy needle comprising the above-mentioned locking device, so the biopsy needle has the same beneficial effects as the above-mentioned locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of the locking device when the anti-inadvertent touch structure and the extension portion are separated provided in the first embodiment of the present invention;

[0027] Figure 2 An exploded view of the fixed lock structure and the anti-accidental touch structure provided in the first embodiment of the present invention;

[0028] Figure 3 A schematic structural diagram of a moving part and an anti-mistouch structure provided in the first embodiment of the present invention;

[0029] Figure 4 A schematic structural diagram of the anti-accidental touch structure provided in the first embodiment of the present invention;

[0030] Figure 5 A schematic structural diagram of the fixing lock structure and the anti-accidental touch structure when the anti-accidental touch structure is separated from the extension portion provided in the first embodiment of the present invention;

[0031] Figure 6 for Figure 5 A cross-sectional view of the fixed lock structure and the anti-accidental touch structure;

[0032] Figure 7 A schematic structural diagram of the fixing lock structure and the anti-accidental touch structure provided in the first embodiment of the present invention when the anti-accidental touch structure is separated from the extension portion and the button is pressed;

[0033] Figure 8 for Figure 7 A cross-sectional view of the fixed lock structure and the anti-accidental touch structure;

[0034] Figure 9 A schematic structural diagram of the fixing lock structure and the anti-accidental touch structure when the anti-accidental touch structure according to the first embodiment of the present invention abuts against the extension portion to limit the position;

[0035] Figure 10 Another structural diagram of the fixing lock structure and the anti-accidental touch structure when the anti-accidental touch structure according to the first embodiment of the present invention abuts against the extension portion to limit the position;

[0036] Figure 11for Figure 10 A cross-sectional view of the fixed lock structure and the anti-accidental touch structure;

[0037] Figure 12 A schematic diagram of the structure of the locking device when the anti-inadvertent touch structure and the extension portion are separated, provided in the second embodiment of the present invention;

[0038] Figure 13 for Figure 12 A front view of the locking device in FIG.

[0039] Figure 14 for Figure 13 AA section view in;

[0040] Figure 15 A schematic structural diagram of a fixed lock structure, a core rod, and a handle housing provided in a second embodiment of the present invention;

[0041] Figure 16 A schematic structural diagram of an anti-accidental touch structure provided in a second embodiment of the present invention;

[0042] Figure 17 A schematic structural diagram of a locking device when the anti-accidental-touch structure according to the second embodiment of the present invention abuts against the extension portion to limit the position;

[0043] Figure 18 for Figure 17 A front view of the locking device in FIG.

[0044] Figure 19 for Figure 18 BB cross-sectional view in;

[0045] Figure 20 A schematic diagram of the structure of the locking device when the anti-inadvertent touch structure and the extension portion are separated, provided in the third embodiment of the present invention;

[0046] Figure 21 for Figure 20 A front view of the locking device in FIG.

[0047] Figure 22 for Figure 21 The CC section view in the figure;

[0048] Figure 23 A schematic structural diagram of a locking device when the anti-accidental-touch structure according to the third embodiment of the present invention abuts against the extension portion to limit the position;

[0049] Figure 24 for Figure 23 A front view of the locking device in FIG.

[0050] Figure 25 for Figure 24 DD cross-sectional view in;

[0051] Figure 26A schematic structural diagram of a locking device when the anti-accidental-touch structure according to the fourth embodiment of the present invention abuts against the extension portion to limit the position;

[0052] Figure 27 for Figure 26 A cross-sectional view of the locking device in FIG.

[0053] Icons: 1-fixed lock structure; 10-moving part; 11-locking part; 12-button; 120-protruding part; 1200-extension part; 121-limiting hole; 1210-second recessed part; 1211-second protrusion; 13-reset spring; 2-core rod; 3-anti-accidental touch structure; 30-abutment part; 31-first protrusion; 32-first socket; 33-limiting part; 34-second socket; 35-limiting part; 4-first limiting structure; 40-first limiting groove; 41-first limiting protrusion; 5-guide structure; 50-slide groove; 51-convex rail; 6-handle housing; 7-second limiting structure; 70-second limiting groove; 71-second limiting protrusion. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0056] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0057] Example 1:

[0058] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the locking device provided in this embodiment includes a fixed lock structure 1, a core rod 2 and an anti-accidental touch structure 3; the fixed lock structure 1 includes a moving part 10 and a button 12, the moving part 10 is slidably connected to the core rod 2 along the axial direction of the core rod 2, the button 12 is installed on the moving part 10 and a locking portion 11 is provided on the button 12, the locking portion 11 is used to be connected to any position of the core rod 2 to limit the sliding of the moving part 10 on the core rod 2, and the button 12 is used to drive the locking portion 11 to move when pressed so that the locking portion 11 is separated from the core rod 2; the button 12 has an extension portion 120 exposed outside the moving part 10, as shown in FIG. Figure 5-Figure 11 As shown, the anti-accidental-touch structure 3 is arranged on one side of the protruding portion 120 and can move relative to the protruding portion 120. The anti-accidental-touch structure 3 is used to abut against the protruding portion 120 to limit the movement of the button 12 when moving close to the protruding portion 120, and to separate from the protruding portion 120 when moving away from the protruding portion 120.

[0059] The locking device provided in this embodiment is applied to medical devices such as biopsy needles with a push-type fixed lock, and the push-type fixed lock is the fixed lock structure 1 in the locking device. Taking the biopsy needle as an example, the fixed lock structure 1 is used to adjust the insertion depth of the biopsy needle and fix the adjusted insertion depth. In the process of adjusting the insertion depth, the button 12 can be pressed first to separate the locking portion 11 from the core rod 2, and then the button 12 can be moved on the core rod 2 while pressing the button 12. Since the button 12 is installed on the movable member 10, the movable member 10 will also be driven to move on the core rod 2 when the button 12 is moved, thereby adjusting the insertion depth of the biopsy needle. When the movable member 10 is moved to the desired insertion depth, the button 12 is released and the locking portion 11 is connected to the core rod 2. At this time, the position of the movable member 10 on the core rod 2 is fixed by the locking portion 11, and the insertion depth of the biopsy needle can be kept fixed.

[0060] It can be seen that the above-mentioned process of unlocking the fixed lock structure 1 and adjusting the needle insertion depth can be achieved by pressing and moving the button 12 with one hand. Therefore, the locking device provided in this embodiment can still ensure the one-handed operation of the push-type fixed lock.

[0061] On this basis, the locking device provided in this embodiment is provided with an anti-accidental touch structure 3 on one side of the extension portion 120 of the button 12, which can move relative to the extension portion 120. Figure 9 、 Figure 10 and Figure 11As shown, when the needle insertion depth does not need to be adjusted, the anti-accidental touch structure 3 can be moved close to the extension 120 until the anti-accidental touch structure 3 and the extension 120 abut against each other along the moving direction of the button 12. At this time, the anti-accidental touch structure 3 can abut against the extension 120 to prevent the button 12 from moving. Even if the button 12 is accidentally touched when operating the fixed lock structure 1 with one hand, the button 12 will not move, thereby not causing the fixed lock structure 1 to be mislocked, effectively preventing the failure of the biopsy needle's puncture positioning. When the needle insertion depth needs to be adjusted, as shown in FIG. Figure 5 and Figure 6 As shown, the anti-accidental touch structure 3 can be moved in the reverse direction to keep the anti-accidental touch structure 3 away from the extension 120 of the button 12. When the anti-accidental touch structure 3 is separated from the extension 120, as shown in FIG. Figure 7 and Figure 8 As shown, the protruding portion 120 is no longer restricted by the anti-incorrect touch structure 3 , the button 12 can be pressed and moved, and the fixed lock structure 1 can also be unlocked.

[0062] It can be seen that the anti-accidental touch structure 3 includes two working states that switch with each other. The working state when the anti-accidental touch structure 3 and the extension portion 120 abut against each other along the moving direction of the button 12 is regarded as the activated state, and the working state when the anti-accidental touch structure 3 and the extension portion 120 are separated is recorded as the regarded state. Figure 10 and Figure 11 As shown, when the anti-accidental-touch structure 3 is in the activated state, it will limit the button 12, effectively preventing the button 12 from being accidentally pressed, and thereby effectively preventing the locking relationship between the fixed lock structure 1 and the core rod 2 from being released; and when the anti-accidental-touch structure 3 is in the closed state, its limiting effect on the button 12 is released, and the button 12 can be pressed and moved, at which time the locking relationship between the fixed lock structure 1 and the core rod 2 can be released.

[0063] It should be noted that since the anti-accidental touch structure 3 is arranged on one side of the protruding portion 120, the movement process of the anti-accidental touch structure 3 and the unlocking and movement process of the fixed lock structure 1 can be achieved through single-handed operation, further improving the convenience of using the biopsy needle.

[0064] It should also be noted that since the anti-accidental touch structure 3 needs to be moved before unlocking the fixed lock structure 1, the anti-accidental touch structure 3 can add a locking safety to the fixed lock structure 1. At this time, even if the button 12 or the anti-accidental touch structure 3 is accidentally touched, the fixed lock structure 1 is not easy to be unlocked, and the puncture positioning failure caused by the fixed lock structure 1 being mislocked can still be prevented.

[0065] Compared with the prior art, the locking device provided in this embodiment can limit the movement of the button 12 by moving the anti-accidental touch structure 3 to abut against the protruding portion 120 of the button 12, thereby effectively preventing the fixed lock structure 1 from being unlocked due to the button 12 being accidentally touched, and can effectively ensure the success of puncture positioning.

[0066] In this embodiment, in order to further improve the convenience of using the fixed lock structure 1, as shown in FIG. Figure 5 As shown in the figure, the fixed lock structure 1 can also include a reset spring 13; and, the moving part 10 is annular, the button 12 is U-shaped, and the two strip portions located between the open side and the closed side of the button 12 are both slidably connected to the moving part 10 in a direction perpendicular to the core rod 2, and the closed side of the button 12 and the part of the strip portion close to the closed side form an extension portion 120, which is located outside the moving part 10, and the reset spring 13 is connected between the closed side of the button 12 and the moving part 10; the core rod 2 is provided with a plurality of teeth grooves distributed in sequence along its axial direction, and the sides of the two strip portions facing each other are provided with convex teeth adapted to the teeth grooves, and the convex teeth are locking parts 11; the convex teeth are used to extend into the teeth grooves or exit from the teeth grooves along the moving direction of the button 12.

[0067] When the convex teeth extend into the tooth groove, the tooth groove and the convex teeth abut against each other along the axial direction of the core rod 2, thereby limiting the axial movement of the movable member 10 along the core rod 2. When the button 12 is pressed, the extension 120 of the button 12 can move near the core rod 2 in the direction perpendicular to the core rod 2, and the return spring 13 is compressed and drives the convex teeth to withdraw from the current tooth groove, so that the movable member 10 and the button 12 slidably connected thereto can all move axially along the core rod 2. After the movable member 10 is adjusted into place, when it is necessary to make the movable member 10 keep its position fixed on the core rod 2, the button 12 can be released, and the return spring 13 will reset and extend and push the button 12 to move away from the core rod 2 in the direction perpendicular to the core rod 2. At the same time, the button 12 can drive the convex teeth to extend into the tooth groove corresponding to its current position, thereby abutting against each other with the inner wall of the tooth groove along the axial direction of the core rod 2, and the movable member 10 is played a locking effect.

[0068] It should be noted that the locking method between the locking portion 11 and the core rod 2 is not limited to the above-mentioned method of interlocking the protruding teeth and the tooth grooves, as long as the locking portion 11 and the core rod 2 can be locked and unlocked under the drive of the return spring 13 and the button 12. For example, the locking portion 11 and the core rod 2 can also be locked by interlocking a pin and a pin hole, or by magnetic attraction.

[0069] Among them, there is no restriction on the installation position of the anti-accidental touch structure 3, as long as it can support the anti-accidental touch structure 3 and realize the movement process of the anti-accidental touch structure 3 relative to the protruding part 120. For example, the anti-accidental touch structure 3 can be installed on the moving part 10, or it can be installed on the outside of the core rod 2 and on other objects on one side of the moving part 10.

[0070] like Figure 2 、 Figure 5 and Figure 10As shown, in this embodiment, the anti-accidental touch structure 3 is preferably movably mounted on the moving part 10 , and the anti-accidental touch structure 3 is used to move relative to the extension portion 120 on the moving part 10 to abut against or separate from the extension portion 120 .

[0071] When the anti-accidental-touch structure 3 is movably installed on the movable part 10, the anti-accidental-touch structure 3 can move along with the core rod 2 when the movable part 10 moves axially along the core rod 2, so as to facilitate the abutment and limiting of the button 12 in the fixed lock structure 1 at any time to prevent the button 12 from being accidentally touched, causing the fixed lock structure 1 to be unlocked.

[0072] The movement of the anti-accidental touch structure 3 relative to the extension portion 120 on the movable member 10 can be a swinging process or a sliding process. Correspondingly, the anti-accidental touch structure 3 and the movable member 10 can be hinged or slidably connected. There is no limitation on the movement mode of the anti-accidental touch structure 3, as long as the anti-accidental touch structure 3 and the button 12 can be brought into contact or separated during the movement.

[0073] like Figure 2 As shown, in this embodiment, the anti-accidental touch structure 3 is preferably slidably connected to the moving part 10 along the circumference of the core rod 2, and the anti-accidental touch structure 3 is used to abut against or separate from the protruding portion 120 during the sliding process on the moving part 10.

[0074] Compared with other connection methods, when the anti-accidental touch structure 3 is slidably connected to the movable part 10 along the circumference of the core rod 2, it can not only improve the stability of the anti-accidental touch structure 3 during movement, but also reduce the space occupied by the anti-accidental touch structure 3 during movement, and at the same time effectively simplify the overall structure of the anti-accidental touch structure 3 and the fixed lock structure 1.

[0075] Further, such as Figure 2 As shown, the anti-accidental-touch structure 3 is arc-shaped and the inner wall of the anti-accidental-touch structure 3 is in contact with the outer wall of the moving part 10 .

[0076] At this time, the anti-accidental touch structure 3 can adopt an arc-shaped plate or sheet structure. When the inner wall of the anti-accidental touch structure 3 fits with the outer wall of the moving part 10, it can not only improve the sliding connection stability between the anti-accidental touch structure 3 and the moving part 10, but also further reduce the volume of the anti-accidental touch structure 3 and the fixed lock structure 1, and simplify the overall structure of the anti-accidental touch structure 3 and the fixed lock structure 1.

[0077] There are many options for the material of the anti-accidental touch structure 3. To ensure the effectiveness of the anti-accidental touch structure 3, in this embodiment, the material of the anti-accidental touch structure 3 is preferably a polymer material such as silicone and plastic.

[0078] like Figure 2 、 Figure 4 and Figure 6 As shown, the side of the anti-mistaken touch structure 3 close to the protruding portion 120 is provided with an abutting portion 30, as shown in FIG. Figure 2 and Figure 6 As shown, a limiting hole 121 is provided on the side wall of the extending portion 120 , and the abutting portion 30 is used to extend into the limiting hole 121 when the anti-mistaken-touch structure 3 moves close to the extending portion 120 to abut and limit the extending portion 120 .

[0079] The abutting portion 30 and the limiting hole 121 cooperate with each other, which can effectively improve the abutting and limiting stability between the extending portion 120 of the button 12 and the anti-accidental touch structure 3, thereby effectively improving the anti-accidental touch effect.

[0080] The abutting portion 30 and the limiting hole 121 can be plugged into each other. Figure 6 As shown, the abutment portion 30 is a first recessed portion provided at the side of the anti-accidental-touch structure 3, and first protrusions 31 are formed on both sides of the first recessed portion; a second recessed portion 1210 is provided on the side facing the abutment portion 30 in the limiting hole 121, and second protrusions 1211 are formed on both sides of the second recessed portion 1210. When the abutment portion 30 extends into the limiting hole 121, the first protrusion 31 abuts against the second recessed portion 1210, and the second protrusion 1211 abuts against the first recessed portion.

[0081] When the abutting portion 30 abuts and limits the protruding portion 120, the second recessed portion 1210 can accommodate the first protrusion 31, and the second recessed portion 1210 accommodates the second protrusion 1211, further improving the abutting stability between the abutting portion 30 and the inner wall of the limiting hole 121, thereby effectively improving the abutting and limiting effect between the protruding portion 120 of the button 12 and the anti-mistouch structure 3.

[0082] like Figure 2 and Figure 4 As shown, a first limiting structure 4 is provided between the anti-accidental touch structure 3 and the movable part 10. The first limiting structure 4 includes a first limiting groove 40 and a first limiting protrusion 41. One of the first limiting groove 40 and the first limiting protrusion 41 is provided on the anti-accidental touch structure 3, and the other is provided on the movable part 10. The first limiting protrusion 41 is used to be clamped in the first limiting groove 40 when the anti-accidental touch structure 3 abuts against the protruding part 120 for limiting.

[0083] When the anti-accidental touch structure 3 abuts against the extension 120 to limit the movement of the button 12, that is, when the anti-accidental touch structure 3 is in an activated state, the first limiting groove 40 and the first limiting protrusion 41 can cooperate with each other to enhance the stability of the current position of the anti-accidental touch structure 3 on the moving part 10, effectively preventing the anti-accidental touch structure 3 from sliding in the opposite direction on the moving part 10 and causing the anti-accidental touch structure 3 to separate from the extension 120, thereby preventing the anti-accidental touch structure 3 from turning to a closed state and being unable to limit the movement of the button 12.

[0084] Therefore, in this embodiment, a first limiting structure 4 is preferably provided between the anti-mistouch structure 3 and the moving member 10 .

[0085] It should be noted that when external force drives the anti-accidental-touch structure 3 to slide in the opposite direction on the moving part 10 and causes the anti-accidental-touch structure 3 to enter a closed state, in order to allow the first limiting protrusion 41 to withdraw from the first limiting groove 40, the outer wall of the first limiting protrusion 41 can be curved, and correspondingly, the inner wall of the first limiting groove 40 can also be curved, and the curved surface of the first limiting groove 40 and the curved surface of the first limiting protrusion 41 can fit each other.

[0086] It should also be noted that the first limiting structure 4 can include multiple first limiting grooves 40 and the multiple first limiting grooves 40 are spaced apart along the sliding direction of the anti-accidental touch structure 3. Among the multiple first limiting grooves, at least one first limiting groove 40 is used to engage with the first limiting protrusion 41 when the anti-accidental touch structure 3 abuts against the protruding part 120 for limiting, and at least one first limiting groove 40 is used to engage with the first limiting protrusion 41 after the anti-accidental touch structure 3 is separated from the protruding part 120.

[0087] It can be seen that when multiple first limiting grooves 40 are set, not only can the first limiting structure 4 be used to limit the anti-accidental touch structure 3 when it is in the activated state to ensure the anti-accidental touch effect, but the anti-accidental touch structure 3 can also be limited when it is in the closed state to ensure the position stability of the anti-accidental touch structure 3.

[0088] In addition, the first limiting groove 40 and the first limiting protrusion 41 in the first limiting structure 4 can also play a role in limiting the moving stroke of the anti-accidental touch structure 3, further improving the use effect of the anti-accidental touch structure 3.

[0089] In addition, if Figure 2 As shown, a guide structure 5 can also be provided between the anti-accidental touch structure 3 and the moving part 10. The guide structure 5 includes a slide groove 50 extending along the sliding direction of the anti-accidental touch structure 3 and a convex rail 51 adapted to the slide groove 50. The convex rail 51 is arranged in the slide groove 50 and can slide in the slide groove 50; one of the convex rail 51 and the slide groove 50 is arranged on the moving part 10, and the other is arranged on the anti-accidental touch structure 3.

[0090] The sliding groove 50 and the convex rail 51 in the guide structure 5 can cooperate with each other to limit and guide the sliding direction of the anti-accidental touch structure 3 on the moving part 10, thereby improving the use effect of the anti-accidental touch structure 3 and preventing the anti-accidental touch structure 3 from changing its moving direction and being unable to switch to the activated state or the closed state.

[0091] When the first limiting structure 4 and the guide structure 5 are provided between the anti-accidental touch structure 3 and the moving member 10, the first limiting structure 4 can also be provided on the guide structure 5. For example, the first limiting groove 40 can be provided in the slide groove 50, and the first limiting protrusion 41 can be provided on the convex rail 51. This arrangement can not only simplify the processing steps of the moving member 10 and the anti-accidental touch structure 3 and improve the processing convenience, but also effectively ensure the balance and stability between the anti-accidental touch structure 3 and the moving member 10.

[0092] Example 2:

[0093] like Figures 12-19 As shown, the locking device provided in this embodiment also includes a fixed lock structure 1, a core rod 2, and an anti-accidental touch structure 3, and its functions are substantially the same as those in the first embodiment. As the similarities between this embodiment and the first embodiment have been described in detail in the first embodiment, they will not be repeated here. The following will describe the differences between this embodiment and the first embodiment.

[0094] Different from the first embodiment, the locking device provided in this embodiment further includes a handle housing 6, such as Figure 12 、 Figure 13 and Figure 15 As shown, the handle shell 6 is sleeved outside the core rod 2 and is located on one side of the movable part 10, and the anti-accidental touch structure 3 is movably installed on the handle shell 6. The anti-accidental touch structure 3 is used to move relative to the protruding part 120 on the handle shell 6 to abut against the protruding part 120 to limit or separate.

[0095] The handle housing 6 is the other object installed outside the core rod 2 and located on one side of the movable member 10 as described in the first embodiment. Since the handle housing 6 is an inherent structure of the biopsy needle, the anti-accidental touch structure 3 is movably mounted on the handle housing 6. This inherent structure of the handle housing 6 can be used to support the anti-accidental touch structure 3 without the need for additional structures. This also reduces the space occupied by the anti-accidental touch structure 3 and simplifies the overall structure of the anti-accidental touch structure 3.

[0096] like Figure 12 、 Figure 14 、 Figure 17 and Figure 19 As shown, an extension portion 1200 may be provided on the side of the extension portion 120 close to the handle housing 6. Along the radial direction of the handle housing 6, there is a limiting gap between the extension portion 1200 and the handle housing 6. The anti-accidental touch structure 3 is used to extend into or exit from the limiting gap during the movement of the handle housing 6 relative to the extension portion 120.

[0097] The extension portion 1200 and the limiting interval make it easy for the anti-accidental-touch structure 3 to abut against the extension portion 120 to limit the movement of the button 12. Therefore, in this embodiment, the extension portion 120 is preferably provided with an extension portion 1200 on the side close to the handle housing 6 and there is a limiting interval between the extension portion 1200 and the handle housing 6.

[0098] When the anti-accidental touch structure 3 is movably mounted on the handle housing 6, the movement of the anti-accidental touch structure 3 relative to the extension 120 on the handle housing 6 can also be a swinging process or a sliding process. Correspondingly, the anti-accidental touch structure 3 and the handle housing 6 can also be hinged or slidably connected. There is no limitation on the movement of the anti-accidental touch structure 3, as long as the anti-accidental touch structure 3 and the button 12 can be abutted or separated during the movement.

[0099] In this embodiment, if Figure 12 、 Figure 14 、 Figure 17 and Figure 19 As shown, in this embodiment, the anti-accidental-touch structure 3 is preferably installed on the handle housing 6 along the circumferential rotation of the handle housing 6, and the anti-accidental-touch structure 3 is used to extend into the limit interval or exit from the limit interval during the rotation process on the handle housing 6.

[0100] Compared with the hinged connection method, when the anti-accidental touch structure 3 is installed on the handle shell 6 along the circumferential rotation of the handle shell 6, it can not only improve the smoothness and stability of the movement process of the anti-accidental touch structure 3, but also reduce the space occupied by the anti-accidental touch structure 3 during the movement process, and at the same time effectively simplify the overall structure of the anti-accidental touch structure 3 and the fixed lock structure 1.

[0101] Further, such as Figure 16 、 Figure 17 and Figure 18 As shown, the anti-accidental touch structure 3 includes a first sleeve 32 and a limiter 33. The first sleeve 32 is sleeved on the outside of the handle housing 6. The limiter 33 is fixed to the side of the first sleeve 32 close to the fixed lock structure 1. The first sleeve 32 is used to drive the limiter 33 to rotate on the handle housing 6 so that the limiter 33 extends into the limit interval or exits from the limit interval.

[0102] The first sleeve 32 is used to achieve a rotational connection between the anti-accidental touch structure 3 and the handle housing 6, which can effectively ensure the stability of the connection between the anti-accidental touch structure 3 and the handle housing 6. The limiter 33 is used to move in and out of the limit interval under the drive of the first sleeve 32, so that the anti-accidental touch structure 3 and the button 12 abut or separate, realizing the switching of the anti-accidental touch structure 3 between the activated state and the deactivated state.

[0103] The first sleeve 32 may be tubular. To facilitate the rotation of the first sleeve 32 and the determination of the position of the limiting member 33 , a hollow structure may be provided on the portion of the first sleeve 32 where the limiting member 33 is not provided.

[0104] like Figure 15 and Figure 16 As shown, a second limiting structure 7 can be provided between the anti-accidental touch structure 3 and the handle shell 6. The second limiting structure 7 includes a second limiting groove 70 and a second limiting protrusion 71. One of the second limiting groove 70 and the second limiting protrusion 71 is provided on the anti-accidental touch structure 3, and the other is provided on the handle shell 6. The second limiting protrusion 71 is used to be clamped in the second limiting groove 70 when the anti-accidental touch structure 3 extends into the limiting interval.

[0105] When the anti-accidental touch structure 3 enters the limiting interval and restricts the movement of the button 12, that is, when the anti-accidental touch structure 3 is in the activated state, the second limiting groove 70 and the second limiting protrusion 71 can cooperate with each other to enhance the stability of the current position of the anti-accidental touch structure 3 on the handle housing 6, effectively preventing the anti-accidental touch structure 3 from rotating in the opposite direction on the handle housing 6 and causing the anti-accidental touch structure 3 to exit from the limiting interval, thereby preventing the anti-accidental touch structure 3 from turning into the closed state and failing to restrict the movement of the button 12. Therefore, in this embodiment, a second limiting structure 7 is preferably provided between the anti-accidental touch structure 3 and the handle housing 6.

[0106] It should be noted that when external force drives the anti-accidental-touch structure 3 to rotate in the opposite direction on the handle shell 6 and the anti-accidental-touch structure 3 enters the closed state, in order to make the second limiting protrusion 71 easy to withdraw from the second limiting groove 70, the outer wall of the second limiting protrusion 71 can be curved, and correspondingly, the inner wall of the second limiting groove 70 can also be curved, and the curved surface of the second limiting groove 70 and the curved surface of the second limiting protrusion 71 can fit each other.

[0107] It should also be noted that the second limiting structure 7 can include multiple second limiting grooves 70, and the multiple second limiting grooves 70 are spaced apart along the rotation direction of the anti-accidental touch structure 3. Among the multiple second limiting grooves, at least one second limiting groove 70 is used to engage with the second limiting protrusion 71 when the anti-accidental touch structure 3 enters the limiting interval, and at least one second limiting groove 70 is used to engage with the second limiting protrusion 71 after the anti-accidental touch structure 3 exits the limiting interval.

[0108] The second limiting structure 7 can also limit the position of the anti-accidental touch structure 3 when it is in the activated state to ensure the anti-accidental touch effect, and can also limit the position of the anti-accidental touch structure 3 when it is in the closed state to ensure the position stability of the anti-accidental touch structure 3. In addition, the second limiting structure 7 can also limit the travel of the anti-accidental touch structure 3, further improving the use effect of the anti-accidental touch structure 3.

[0109] Similar to the first embodiment, a guide structure 5 may also be provided between the anti-accidental touch structure 3 and the handle housing 6 in this embodiment. The guide structure 5 also includes a slide groove 50 extending along the rotation direction of the anti-accidental touch structure 3 and a convex rail 51 adapted to the slide groove 50. The convex rail 51 is disposed within the slide groove 50 and is rotatable within the slide groove 50. One of the convex rail 51 and the slide groove 50 is disposed on the handle housing 6, and the other is disposed on the anti-accidental touch structure 3. In this embodiment, the guide structure 5 can also utilize the slide groove 50 and the convex rail 51 to cooperate with each other to limit and guide the rotation process of the anti-accidental touch structure 3 on the handle housing 6, thereby improving the use effect of the anti-accidental touch structure 3.

[0110] Example 3:

[0111] like Figure 20-25 As shown, the locking device provided in this embodiment also includes a fixed lock structure 1, a core rod 2, an anti-accidental touch structure 3, a handle housing 6, an extension portion 1200 and a limit spacer, and its functions are substantially the same as those in the second embodiment. As the similarities between this embodiment and the second embodiment have been described in detail in the second embodiment, they will not be repeated here. The following describes the differences between this embodiment and the second embodiment.

[0112] Different from the second embodiment, in the locking device provided in this embodiment, the anti-accidental touch structure 3 is slidingly connected and / or rollingly connected to the handle shell 6, and the anti-accidental touch structure 3 can move axially on the handle shell 6 along the handle shell 6 to extend into the limit interval or exit from the limit interval.

[0113] When it is necessary to switch the anti-false touch structure 3 between the activated state and the closed state, as shown in FIG. Figure 21 、 Figure 22 、 Figure 23 and Figure 24 As shown, the anti-accidental-touch structure 3 can be moved into and out of the limiting interval by sliding or rolling the anti-accidental-touch structure 3 on the handle housing 6 along its axial direction.

[0114] Furthermore, in this embodiment, the anti-incorrect touch structure 3 and the handle housing 6 are preferably connected in a sliding manner, such as Figure 21 and Figure 24 As shown, the anti-accidental touch structure 3 includes a second socket 34, which is sleeved on the outside of the handle shell 6. The position of the second socket 34 close to the fixed lock structure 1 forms a limiting portion 35, and the second socket 34 is used to move axially on the handle shell 6 along the handle shell 6 so that its limiting portion 35 extends into the limiting interval or exits from the limiting interval.

[0115] The second sleeve 34 can be tubular and is used to achieve a sliding connection between the anti-accidental touch structure 3 and the handle housing 6. The second sleeve 34 can increase the contact area between the anti-accidental touch structure 3 and the handle housing 6, thereby effectively ensuring the sliding stability between the anti-accidental touch structure 3 and the handle housing 6. The limiting portion 35 is used to move in and out of the limiting interval under the drive of the second sleeve 34, so that the anti-accidental touch structure 3 and the button 12 abut or separate, realizing the switching of the anti-accidental touch structure 3 between the activated state and the deactivated state.

[0116] In order to prevent the process of the anti-accidental touch structure 3 entering the limit interval from being hindered, as shown in FIG. Figure 20 As shown, a notch may be provided at the side of the second sleeve member 34 close to the fixed lock structure 1 , and the side of the second sleeve member 34 close to the fixed lock structure 1 at the notch forms a limiting portion 35 .

[0117] In order to facilitate the disassembly and assembly of the second sleeve 34 on the handle housing 6, Figure 20 As shown, an expansion joint can be provided between the side of the second sleeve 34 close to the fixed lock structure 1 and the side away from the anti-accidental touch structure 3. At this time, the material of the second sleeve 34 is an elastic material. The expansion joint is used to allow the handle shell 6 to enter and exit the second sleeve 34 along the radial direction of the second sleeve 34, thereby realizing the disassembly and assembly process between the second sleeve 34 and the handle shell 6. At the same time, the expansion joint can also restore the second sleeve 34 to its original shape after the handle shell 6 enters the second sleeve 34, thereby limiting the handle shell 6 and preventing the handle shell 6 from falling out of the second sleeve 34.

[0118] Similar to the second embodiment, in the locking device of this embodiment, a second limiting structure 7 may also be provided between the anti-accidental touch structure 3 and the handle housing 6. The second limiting structure 7 includes a second limiting groove 70 and a second limiting protrusion 71. One of the second limiting groove 70 and the second limiting protrusion 71 is provided on the anti-accidental touch structure 3, and the other is provided on the handle housing 6. The second limiting protrusion 71 is used to be clamped in the second limiting groove 70 when the anti-accidental touch structure 3 extends into the limiting interval.

[0119] When the anti-accidental touch structure 3 enters the limiting interval and limits the movement of the button 12, that is, when the anti-accidental touch structure 3 is in the activated state, the second limiting groove 70 and the second limiting protrusion 71 can cooperate with each other to improve the stability of the current position of the anti-accidental touch structure 3 on the handle housing 6, effectively preventing the anti-accidental touch structure 3 from sliding back on the handle housing 6 and causing the anti-accidental touch structure 3 to exit from the limiting interval, thereby preventing the anti-accidental touch structure 3 from turning to the closed state and failing to limit the movement of the button 12. Therefore, in this embodiment, a second limiting structure 7 is preferably provided between the anti-accidental touch structure 3 and the handle housing 6.

[0120] Similarly, in order to make it easy for the second limiting protrusion 71 to withdraw from the second limiting groove 70, the outer wall of the second limiting protrusion 71 in this embodiment can be curved, and the inner wall of the second limiting groove 70 can also be curved, and the curved surface of the second limiting groove 70 and the curved surface of the second limiting protrusion 71 can fit each other.

[0121] In addition, the second limiting structure 7 in this embodiment may also include multiple second limiting grooves 70, and the multiple second limiting grooves 70 are spaced apart along the sliding direction of the anti-accidental touch structure 3. Among the multiple second limiting grooves, at least one second limiting groove 70 is used to engage with the second limiting protrusion 71 when the anti-accidental touch structure 3 enters the limiting interval, and at least one second limiting groove 70 is used to engage with the second limiting protrusion 71 after the anti-accidental touch structure 3 exits the limiting interval.

[0122] The second limiting structure 7 can also limit the position of the anti-accidental touch structure 3 when it is in the activated state to ensure the anti-accidental touch effect, and can also limit the position of the anti-accidental touch structure 3 when it is in the closed state to ensure the position stability of the anti-accidental touch structure 3. In addition, the second limiting structure 7 can also play a role in limiting the movement of the anti-accidental touch structure 3.

[0123] Similar to the second embodiment, a guide structure 5 may also be provided between the anti-accidental touch structure 3 and the handle housing 6 in this embodiment. The guide structure 5 includes a slide groove 50 extending along the sliding direction of the anti-accidental touch structure 3 and a convex rail 51 adapted to the slide groove 50. The convex rail 51 is disposed in the slide groove 50 and is rotatable within the slide groove 50. One of the convex rail 51 and the slide groove 50 is disposed on the handle housing 6, and the other is disposed on the anti-accidental touch structure 3. In this embodiment, the guide structure 5 can also utilize the slide groove 50 and the convex rail 51 to cooperate with each other to limit and guide the sliding process of the anti-accidental touch structure 3 on the handle housing 6, thereby improving the use effect of the anti-accidental touch structure 3.

[0124] Example 4:

[0125] like Figure 26 and Figure 27 As shown, the locking device provided in this embodiment also includes a fixed lock structure 1, a core rod 2, an anti-accidental touch structure 3, a handle housing 6, an extension portion 1200 and a limit spacer, and its functions are substantially the same as those in the third embodiment. As the similarities between this embodiment and the third embodiment have been described in detail in the third embodiment, they will not be repeated here. The following describes the differences between this embodiment and the third embodiment.

[0126] Different from the third embodiment, in the locking device provided in this embodiment, the anti-accidental touch structure 3 is a limiting ring, which is sleeved on the outside of the handle shell 6. The limiting ring is used to move along the axial direction of the handle shell 6 on the handle shell 6 to extend into the limiting interval or exit from the limiting interval.

[0127] When the anti-accidental touch structure 3 is a limiting ring, the material of the limiting ring and the friction between the limiting ring and the handle shell 6 can be adjusted so that the movement process of the limiting ring on the handle shell 6 is a sliding process or a rolling process, or both a sliding process and a rolling process.

[0128] In this embodiment, when the limiting ring is inserted into the limiting interval, it is preferably interference-fitted with the handle housing 6. Correspondingly, the material of the limiting ring is preferably a polymer material such as silicone or silicone rubber.

[0129] The interference fit method can effectively improve the stability of the limiting ring within the limiting interval, thereby effectively improving the limiting effect of the limiting ring on the button 12.

[0130] Embodiment 5:

[0131] This embodiment provides a biopsy needle, which includes the locking device of the above-mentioned embodiment 1, embodiment 2, embodiment 3 or embodiment 4. Therefore, the biopsy needle provided by this embodiment has the various beneficial effects of the locking device of the above-mentioned embodiment 1, embodiment 2, embodiment 3 or embodiment 4, which will not be repeated here.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A locking device, characterized in that: It comprises a fixed lock structure (1), a core rod (2) and an anti-accidental touch structure (3); The fixed lock structure (1) comprises a moving part (10) and a button (12), wherein the moving part (10) is slidably connected to the core rod (2) along the axial direction of the core rod (2), the button (12) is mounted on the moving part (10) and a locking portion (11) is provided on the button (12), the locking portion (11) is used to be connected to any position of the core rod (2) to limit the sliding of the moving part (10) on the core rod (2), and the button (12) is used to drive the locking portion (11) to move when being pressed so as to separate the locking portion (11) from the core rod (2); The button (12) has a protruding portion (120) exposed outside the moving part (10); the anti-accidental touch structure (3) is arranged on one side of the protruding portion (120) and is movable relative to the protruding portion (120); the anti-accidental touch structure (3) is used to abut against the protruding portion (120) to limit the movement of the button (12) when moving close to the protruding portion (120), and to separate from the protruding portion (120) when moving away from the protruding portion (120).

2. The locking device according to claim 1, characterized in that The anti-accidental touch structure (3) is movably mounted on the moving part (10), and the anti-accidental touch structure (3) is used to move on the moving part (10) relative to the extending portion (120) to abut against or separate from the extending portion (120).

3. The locking device according to claim 2, characterized in that The anti-accidental touch structure (3) is slidably connected to the moving part (10) along the circumference of the core rod (2), and the anti-accidental touch structure (3) is used to abut against or separate from the protruding portion (120) during the sliding process on the moving part (10).

4. The locking device according to claim 3, characterized in that: The side of the anti-accidental touch structure (3) close to the protruding portion (120) is provided with an abutting portion (30), and the side wall of the protruding portion (120) is provided with a limiting hole (121). The abutting portion (30) is used to extend into the limiting hole (121) when the anti-accidental touch structure (3) moves close to the protruding portion (120) to abut and limit the protruding portion (120).

5. The locking device according to claim 3 or 4, characterized in that: A first limiting structure (4) is provided between the anti-accidental touch structure (3) and the movable member (10), wherein the first limiting structure (4) comprises a first limiting groove (40) and a first limiting protrusion (41), wherein one of the first limiting groove (40) and the first limiting protrusion (41) is provided on the anti-accidental touch structure (3), and the other is provided on the movable member (10), and the first limiting protrusion (41) is used for being clamped in the first limiting groove (40) when the anti-accidental touch structure (3) abuts against the protruding portion (120) for limiting.

6. The locking device according to claim 1, wherein: The invention also includes a handle shell (6), the handle shell (6) being sleeved outside the core rod (2) and located on one side of the movable member (10), the anti-accidental touch structure (3) being movably mounted on the handle shell (6), and the anti-accidental touch structure (3) being used to move on the handle shell (6) relative to the extension portion (120) so as to abut against or separate from the extension portion (120).

7. The locking device according to claim 6, characterized in that An extension portion (1200) is provided on a side of the protruding portion (120) close to the handle housing (6), and a limiting interval is provided between the extension portion (1200) and the handle housing (6) along the radial direction of the handle housing (6), and the anti-accidental touch structure (3) is used to extend into the limiting interval or exit from the limiting interval during the process of the handle housing (6) moving relative to the protruding portion (120).

8. The locking device according to claim 7, characterized in that The anti-accidental touch structure (3) is rotatably mounted on the handle housing (6) along the circumference of the handle housing (6), and the anti-accidental touch structure (3) is used to extend into the limit interval or exit from the limit interval during the process of rotating on the handle housing (6).

9. The locking device according to claim 8, characterized in that The anti-accidental touch structure (3) comprises a first sleeve (32) and a limiting member (33), wherein the first sleeve (32) is sleeved on the outside of the handle housing (6), and the limiting member (33) is fixed to a side of the first sleeve (32) close to the fixed lock structure (1), and the first sleeve (32) is used to drive the limiting member (33) to rotate on the handle housing (6) so that the limiting member (33) extends into the limiting interval or exits from the limiting interval.

10. The locking device according to claim 7, characterized in that The anti-accidental touch structure (3) is slidably connected and / or rollingly connected to the handle housing (6), and the anti-accidental touch structure (3) is capable of moving on the handle housing (6) along the axial direction of the handle housing (6) to extend into the limit interval or exit from the limit interval.

11. The locking device according to claim 10, characterized in that: The anti-accidental-touch structure (3) comprises a second sleeve (34), which is sleeved on the outside of the handle housing (6), and a position of the second sleeve (34) close to the fixed lock structure (1) forms a limiting portion (35), and the second sleeve (34) is used to move on the handle housing (6) along the axial direction of the handle housing (6) so that the limiting portion (35) extends into the limiting interval or exits from the limiting interval.

12. The locking device according to claim 10, characterized in that The anti-accidental touch structure (3) is a limiting ring, which is sleeved on the outside of the handle housing (6). The limiting ring is used to move on the handle housing (6) along the axial direction of the handle housing (6) to extend into the limiting interval or exit from the limiting interval.

13. The locking device according to any one of claims 7 to 11, characterized in that: A second limiting structure (7) is provided between the anti-accidental touch structure (3) and the handle housing (6), and the second limiting structure (7) includes a second limiting groove (70) and a second limiting protrusion (71), one of the second limiting groove (70) and the second limiting protrusion (71) is provided on the anti-accidental touch structure (3), and the other is provided on the handle housing (6), and the second limiting protrusion (71) is used to be engaged with the second limiting groove (70) when the anti-accidental touch structure (3) extends into the limiting interval.

14. A biopsy needle, characterized in that: Comprising the locking device according to any one of claims 1-13.

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