Locking assembly and biopsy needle

Abstract

The utility model provides a locking assembly and biopsy needle relates to biopsy device technical field. The locking assembly includes the collar, first button and second button, the collar is used for the sleeve of the core pole outside biopsy needle and can be on the core pole along its axial movement, first button and second button are arranged in the both sides of the collar and all are with the sliding connection of the collar, first button includes the first limit department with the core pole arbitrary position connection, second button includes the second limit department with the core pole arbitrary position connection, first limit department and second limit part are used for when being connected with the core pole respectively, the collar is limited on the core pole along its axial movement, and when first button and second button are pressed, separate with the core pole. The first button and second button in the locking assembly form double button, only double button is pressed can realize the unlocking of the collar on the core pole, this double button not only can be operated by one hand similarly, and effectively reduces the risk of false touch of the existing press type fixed lock.

Description

Technical Field

[0001] This utility model relates to the field of biopsy device technology, and in particular to a locking component and a biopsy needle. Background Technology

[0002] A biopsy needle is a medical device used for puncture and sampling. A biopsy needle typically consists of a handle and a core. One end of the core is fitted inside the handle, and the core has a locking mechanism to lock the insertion depth. When using this biopsy needle, the position of the locking mechanism on the core must first be adjusted according to the insertion depth. Then, the locking mechanism is fixed in that position to lock the insertion depth, and finally, the needle is manually pushed out from the handle.

[0003] To facilitate one-handed operation of the fixation lock by medical staff, a current biopsy needle employs a push-button fixation lock. This push-button fixation lock includes a collar fitted over the core rod and a button slidably connected to the collar. A return spring is provided between the button and the collar, and the button has a locking protrusion. The outer peripheral wall of the core rod has multiple toothed grooves distributed along its length. When the button is pressed, the locking protrusion disengages from the toothed grooves, allowing the fixation lock to move 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 locking protrusion to engage with the toothed groove at its original location, thereby fixing the fixation lock in place on the core rod.

[0004] Therefore, the unlocking and moving processes of the push-button type lock can be completed with one hand. However, the push-button type lock is also prone to accidental activation, which can lead to failure of puncture positioning. Utility Model Content

[0005] The purpose of this invention is to provide a locking component and a biopsy needle to alleviate the technical problem in the prior art where the unlocking and fixing process and the movement process of the press-type fixation lock on the biopsy needle can be completed by one-handed operation, but the press-type fixation lock is also prone to accidental activation, leading to failure of puncture positioning.

[0006] In a first aspect, this utility model provides a locking component, including a collar, a first button, and a second button; The collar is used to be fitted over the core of the biopsy needle and can move along the core along its axial direction. The first button and the second button are respectively located on both sides of the collar and are slidably connected to the collar. The first button includes a first limiting part that can be connected to any position of the core rod, and the second button includes a second limiting part that can be connected to any position of the core rod. The first limiting part and the second limiting part are respectively used to restrict the collar from moving axially on the core rod when connected to the core rod, and to separate from the core rod when the first button and the second button are pressed.

[0007] In an optional embodiment, the first button further includes a first pressing part and a first sliding part, the first pressing part, the first sliding part and the first limiting part being connected in sequence; a first sliding hole is provided between the outer peripheral wall and the inner peripheral wall of the collar, the first sliding part is slidably connected in the first sliding hole, the first limiting part is located inside the collar, and the first pressing part is located outside the collar; The second button further includes a second pressing part and a second sliding part, the second pressing part, the second sliding part and the second limiting part are connected in sequence; a second sliding hole is provided between the outer peripheral wall and the inner peripheral wall of the collar, the second sliding part is slidably connected in the second sliding hole, the second limiting part is located inside the collar, and the second pressing part is located outside the collar.

[0008] In an optional embodiment, a first clearance groove is provided on the outer peripheral wall of the collar at a position corresponding to the first pressing part, and the first pressing part is located in the first clearance groove; The outer peripheral wall of the collar is provided with a second clearance groove at the position corresponding to the second pressing part, and the second pressing part is located in the second clearance groove.

[0009] In an optional embodiment, the side of the first pressing part facing away from the collar is located inside the first relief groove, and the side of the second pressing part facing away from the collar is located inside the second relief groove.

[0010] In an optional embodiment, both the first limiting part and the second limiting part are snap-fit ​​protrusions, and both the first sliding part and the second sliding part are cantilever arms, with each cantilever arm including a free end. The free end of the cantilever extends into the inside of the collar, and the snap-fit ​​protrusion is fixed to the arm of the cantilever located inside the collar. The snap-fit ​​protrusion is used to extend into any of the multiple toothed grooves distributed along the axial direction on the core rod, and abuts against the inner peripheral wall of the toothed groove along the axial direction of the core rod.

[0011] In an optional embodiment, the first button further includes a first guide portion, the first guide portion and the first sliding portion are fixed on the same side of the first pressing portion, and the first guide portion and the first sliding portion are distributed at intervals along the circumference of the collar; a first guide hole is also provided between the outer peripheral wall and the inner peripheral wall of the collar, and the first guide portion is slidably connected in the first guide hole; The second button further includes a second guide portion, the second guide portion and the second sliding portion are fixed on the same side of the second pressing portion, and the second guide portion and the second sliding portion are distributed at intervals along the circumference of the collar; a second guide hole is also provided between the outer peripheral wall and the inner peripheral wall of the collar, and the second guide portion is slidably connected in the second guide hole.

[0012] In an optional embodiment, the first button and the second button are centrally symmetrical about the center point of the collar.

[0013] In an optional embodiment, a first reset member is provided between the first button and the collar, the first reset member being used to store energy when the first button is pressed and slides on the collar; A second reset member is provided between the second button and the collar, and the second reset member is used to store energy when the second button is pressed and slides on the collar.

[0014] In an optional embodiment, it further includes a first telescopic member and a second telescopic member, the first telescopic member and the second telescopic member being respectively disposed on both sides of the core rod, the collar having a first through hole at the position corresponding to the first telescopic member, and the collar having a second through hole at the position corresponding to the second telescopic member; The first button has a first trigger on the side facing the collar. The first trigger is used to pass through the first through hole and push the first telescopic member to extend or shorten when the first button is pressed. The first telescopic member is used to extend to insert into the first through hole or shorten to exit from the first through hole after the pressed first button is reset. The second button has a second trigger on the side facing the collar. The second trigger is used to pass through the second through hole and push the second telescopic member to extend or retract when the second button is pressed. The second telescopic member is used to extend to insert into the second through hole or retract to exit from the second through hole after the pressed second button is reset.

[0015] Secondly, this utility model provides a biopsy needle, including the locking component described in any of the foregoing embodiments.

[0016] The locking assembly provided by this utility model includes a collar, a first button, and a second button. The collar is used to fit over the core of a biopsy needle and is movable along the core's axial direction. The first button and the second button are respectively disposed on both sides of the collar and are slidably connected to it. The first button includes a first limiting part that can connect to any position on the core, and the second button includes a second limiting part that can connect to any position on the core. The first and second limiting parts are respectively used to restrict the collar's axial movement along the core when connected to it, and to separate it from the core when the first and second buttons are pressed. The locking assembly provided by this utility model is applied to biopsy needles, and is used to adjust the insertion depth of the biopsy needle and lock the insertion depth after adjustment. Specifically, when using this locking component, first, the collar is placed over the mandrel. When it is necessary to adjust the insertion depth of the biopsy needle, press the first and second buttons to separate the first and second limiting parts from the mandrel, thereby releasing the first and second limiting parts from restricting the position of the collar on the mandrel. Then, while keeping the first and second buttons pressed, moving the first and second buttons will move the collar along the axial direction of the mandrel, thus adjusting the insertion depth. It should be noted that if only the first or second button is pressed, the limiting part on the unpressed button will still be engaged in the groove on the mandrel, thus locking the collar. In this case, the collar cannot move on the mandrel, meaning it is not unlocked. This effectively prevents the operator from accidentally pressing a single button during instrument use, which could cause the biopsy needle to slip out and puncture the body. After adjusting the needle insertion depth to the correct position, release the first and second buttons to reset them. This resets the first and second limiting parts, connecting them to the current position of the mandrel. At this point, the collar's position on the mandrel is locked, and the current insertion depth of the biopsy needle is also locked, ensuring effective puncture positioning. It can be seen that although the locking component provided by this invention uses a dual-button combination of the first and second buttons to lock and unlock the collar's position on the mandrel, it still ensures single-handed operation. Furthermore, since the first and second buttons are located on opposite sides of the collar, and both buttons must be pressed for the collar to slide on the mandrel, the operation of this dual-button system requires at least two fingers to operate on opposite sides of the collar, effectively reducing the risk of accidental activation and improving the success rate and accuracy of the puncture positioning process.

[0017] Compared with the prior art, the first and second buttons in the locking assembly provided by this utility model form a double button. Only when both buttons are pressed can the collar be unlocked on the core rod. This double button can not only be operated with one hand, but also effectively reduces the risk of accidental activation of existing push-button type locks.

[0018] The biopsy needle provided by this utility model includes the above-mentioned locking component, and therefore the biopsy needle has the same beneficial effect as the above-mentioned locking component. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of the locking component provided in an embodiment of this utility model; Figure 2 Another structural schematic diagram of the locking component provided in this embodiment of the utility model; Figure 3 A schematic diagram of the core rod provided in an embodiment of this utility model; Figure 4 A partial structural schematic diagram of the locking component provided in an embodiment of this utility model; Figure 5 Another structural schematic diagram of the locking component provided in an embodiment of this utility model; Figure 6 A schematic diagram of the structure of the first button, the first telescopic member, the first trigger member, and the core rod provided in an embodiment of this utility model; Figure 7 A cross-sectional view of the first button, the first telescopic member, the first trigger member, and the core rod provided in an embodiment of this utility model; Figure 8 Another cross-sectional view of the first button, first telescopic member, first trigger member and core rod provided in an embodiment of the present utility model; Figure 9 This is a partial structural diagram of the biopsy needle provided in an embodiment of the present invention.

[0021] Icons: 1-Loop; 10-First sliding hole; 11-Second sliding hole; 12-First clearance groove; 13-First guide hole; 14-Second guide hole; 2-First button; 20-First limiting part; 21-First pressing part; 22-First sliding part; 23-First guide part; 3-Second button; 30-Second limiting part; 31-Second pressing part; 32-Second sliding part; 33-Second guide part; 4-Core rod; 40-Groove; 5-First reset component; 6-Second reset component; 7-First telescopic component; 8-First trigger component. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Example: like Figures 1-2 As shown, the locking assembly provided in this embodiment includes a collar 1, a first button 2, and a second button 3; the collar 1 is used to be fitted onto... Figure 3 The biopsy needle shown has a core rod 4 outside and is movable along its axial direction on the core rod 4. The first button 2 and the second button 3 are respectively disposed on both sides of the collar 1 and are slidably connected to the collar 1. The first button 2 includes a first limiting part 20 that can be connected to any position of the core rod 4, and the second button 3 includes a second limiting part 30 that can be connected to any position of the core rod 4. The first limiting part 20 and the second limiting part 30 are respectively used to restrict the collar 1 from moving along its axial direction on the core rod 4 when connected to the core rod 4, and to separate from the core rod 4 when the first button 2 and the second button 3 are pressed.

[0026] The locking component provided in this embodiment is applied to a biopsy needle. This locking component is used to adjust the insertion depth of the biopsy needle and to lock the insertion depth after adjustment. Specifically, when using this locking component, the collar 1 is first fitted over the core rod 4, such as... Figure 3 As shown, the core rod 4 is usually provided with a plurality of toothed grooves 40 arranged sequentially along its axial direction. When the collar 1 is sleeved on the outside of the core rod 4, the first limiting part 20 of the first button 2 on one side of the collar 1 and the second limiting part 30 on the other side of the collar 1 can be engaged in the toothed grooves 40, thereby abutting against the inner peripheral wall of the toothed grooves 40 along the axial direction of the core rod 4, and restricting the collar 1 from moving along its axial direction on the core rod 4.

[0027] When it is necessary to adjust the insertion depth of the biopsy needle, press the first button 2 and the second button 3 to separate the first limiting part 20 and the second limiting part 30 from the core rod 4 (that is, the first limiting part 20 and the second limiting part 30 retract from the toothed groove 40 on the core rod 4), thereby releasing the first limiting part 20 and the second limiting part 30 from limiting the position of the collar 1 on the core rod 4. Then, while keeping the first button 2 and the second button 3 pressed, the collar 1 can be moved along its axial direction on the core rod 4 by moving the first button 2 and the second button 3 to achieve the adjustment of the insertion depth.

[0028] It should be noted that if only the first button 2 or the second button 3 is pressed, the limiting part on the unpressed button will still be engaged in the toothed groove 40 on the core rod 4, thus limiting and locking the collar 1. At this time, the collar 1 cannot move on the core rod 4, that is, the collar 1 is not unlocked. This can effectively prevent the operator from accidentally pressing a single button during the use of the instrument, which could cause the biopsy needle to slip out and puncture the human body.

[0029] After adjusting the needle insertion depth to the correct position, release the first button 2 and the second button 3 to reset them. This will cause the first limiting part 20 and the second limiting part 30 to reset and connect with the current position of the core rod 4. At this time, the position of the collar 1 on the core rod 4 is locked, and the current insertion depth of the biopsy needle is also locked, which can ensure the puncture positioning effect.

[0030] As can be seen, although the locking component provided in this embodiment uses a dual-button combination of the first button 2 and the second button 3 to lock and unlock the collar 1 on the core rod 4, it still ensures the feasibility of single-handed operation. Furthermore, since the first button 2 and the second button 3 are respectively located on both sides of the collar 1, and the collar 1 can only slide on the core rod 4 after both buttons 2 and 3 are pressed, the operation of this dual-button system requires at least two fingers to operate on both sides of the collar 1, effectively reducing the risk of accidental activation and improving the success rate and accuracy of the puncture positioning process.

[0031] Compared with the prior art, the first button 2 and the second button 3 in the locking component provided in this embodiment form a double button. Only when both buttons are pressed can the collar 1 be unlocked on the core rod 4. This double button can not only be operated with one hand, but also effectively reduces the risk of accidental activation of existing push-button type locks.

[0032] like Figure 2As shown, the first button 2 further includes a first pressing part 21 and a first sliding part 22, which are connected in sequence. The first pressing part 21, the first sliding part 22 and the first limiting part 20 are connected in sequence. A first sliding hole 10 is provided between the outer peripheral wall and the inner peripheral wall of the collar 1. The first sliding part 22 is slidably connected in the first sliding hole 10. The first limiting part 20 is located inside the collar 1 and the first pressing part 21 is located outside the collar 1. The second button 3 further includes a second pressing part 31 and a second sliding part 32, which are connected in sequence. A second sliding hole 11 is provided between the outer peripheral wall and the inner peripheral wall of the collar 1. The second sliding part 32 is slidably connected in the second sliding hole 11. The second limiting part 30 is located inside the collar 1 and the second pressing part 31 is located outside the collar 1.

[0033] The first pressing part 21 and the second pressing part 31 are used to improve the pressing comfort of the first button 2 and the second button 3, respectively. The first sliding part 22 and the first sliding hole 10 can make the sliding process of the first button 2 on the collar 1 more stable, thereby improving the usability of the first button 2. Correspondingly, the second sliding part 32 and the second sliding hole 11 can make the sliding process of the second button 3 on the collar 1 more stable, thereby improving the usability of the second button 3.

[0034] like Figure 4 As shown, a first clearance groove 12 is provided on the outer peripheral wall of the collar 1 at the position corresponding to the first pressing part 21, and the first pressing part 21 is located in the first clearance groove 12; a second clearance groove is provided on the outer peripheral wall of the collar 1 at the position corresponding to the second pressing part 31, and the second pressing part 31 is located in the second clearance groove.

[0035] The first clearance groove 12 can accommodate the first pressing part 21, thereby reducing the space occupied by the first button 2 on the periphery of the collar 1. At the same time, the first clearance groove 12 can also guide the first pressing part 21, making the sliding process of the first button 2 on the collar 1 more stable.

[0036] Correspondingly, the second clearance groove can accommodate the second pressing part 31, thereby reducing the space occupied by the second button 3 on the periphery of the collar 1. At the same time, the second clearance groove can also guide the second pressing part 31, making the sliding process of the second button 3 on the collar 1 more stable.

[0037] like Figure 4 As shown, the side of the first pressing part 21 facing away from the collar 1 is located inside the first clearance groove 12, and the side of the second pressing part 31 facing away from the collar 1 is located inside the second clearance groove. This arrangement allows the first pressing part 21 to be hidden inside the first clearance groove 12 and the second pressing part 31 to be hidden inside the second clearance groove, preventing the first pressing part 21 from extending outside the first clearance groove 12 and the second pressing part 31 from extending outside the second clearance groove, thus reducing the risk of accidental activation of the locking assembly.

[0038] like Figure 2 As shown, the first limiting part 20 and the second limiting part 30 are both snap-fit ​​protrusions, and the first sliding part 22 and the second sliding part 32 are both cantilever arms, with the cantilever arms including a free end. The free end of the cantilever arm extends into the inside of the collar 1, and the snap-fit ​​protrusion is fixed to the arm of the cantilever arm located inside the collar 1. The snap-fit ​​protrusion is used to extend into any one of the multiple tooth grooves 40 distributed along the axial direction on the core rod 4, and abuts against the inner peripheral wall of the tooth groove 40 along the axial direction of the core rod 4.

[0039] The cantilever is used to support the snap-fit ​​protrusion, so that the snap-fit ​​protrusion can extend tangentially into the toothed groove 40 on the core rod 4.

[0040] To improve the engagement stability between the snap-fit ​​protrusion and the slot, such as Figure 2 As shown, there can be multiple snap-fit ​​protrusions. These multiple snap-fit ​​protrusions are distributed sequentially along the axial direction of the collar 1 on the side of the cantilever facing the core rod 4. When the snap-fit ​​protrusions snap into the toothed grooves 40, the multiple snap-fit ​​protrusions can snap into the multiple toothed grooves 40 on the core rod 4 currently blocked by the collar 1, thereby improving the limiting and fixing effect of the button on the collar 1.

[0041] Furthermore, such as Figure 2 As shown, the first button 2 also includes a first guide portion 23, the first guide portion 23 and the first sliding portion 22 are fixed on the same side of the first pressing portion 21, and the first guide portion 23 and the first sliding portion 22 are distributed at intervals along the circumference of the collar 1; a first guide hole 13 is also provided between the outer peripheral wall and the inner peripheral wall of the collar 1, and the first guide portion 23 is slidably connected in the first guide hole 13; the second button 3 also includes a second guide portion 33, the second guide portion 33 and the second sliding portion 32 are fixed on the same side of the second pressing portion 31, and the second guide portion 33 and the second sliding portion 32 are distributed at intervals along the circumference of the collar 1; a second guide hole 14 is also provided between the outer peripheral wall and the inner peripheral wall of the collar 1, and the second guide portion 33 is slidably connected in the second guide hole 14.

[0042] The first guide part 23 can not only guide the first button 2 as it moves on the collar 1, but also cooperate with the first sliding part 22 to improve the balance of the first button 2 on the collar 1, thereby effectively improving the stability of the first button 2 in use.

[0043] Correspondingly, the second guide part 33 can not only guide the second button 3 during its movement on the collar 1, but also cooperate with the second sliding part 32 to improve the balance of the second button 3 on the collar 1, thereby effectively improving the stability of the second button 3 in use.

[0044] In this embodiment, as Figure 2As shown, the first button 2 and the second button 3 are centrally symmetrical about the center point of the collar 1. Central symmetry means that the first button 2 coincides with the second button 3 after rotating 180 degrees around the center point of the collar 1. This arrangement makes the dual buttons formed by the first button 2 and the second button 3 more evenly distributed around the collar 1, thereby further improving the structural stability and operational stability of the locking component.

[0045] like Figure 2 As shown, a first reset member 5 is provided between the first button 2 and the collar 1. The first reset member 5 is used to store energy when the first button 2 is pressed and slides on the collar 1. A second reset member 6 is provided between the second button 3 and the collar 1. The second reset member 6 is used to store energy when the second button 3 is pressed and slides on the collar 1.

[0046] Both the first reset member 5 and the second reset member 6 can be springs. When the first button 2 and the second button 3 are pressed, the first reset member 5 and the second reset member 6 are in a compressed and energy-storing state. When the first button 2 and the second button 3 are released, the first reset member 5 and the second reset member 6 release energy under the elastic recovery action, thereby pushing the first button 2 and the second button 3 to reset, so that the first button 2 and the second button 3 re-drive the first limiting part 20 and the second limiting part 30 to engage with the toothed groove 40 on the core rod 4, thereby realizing the automatic locking of the collar 1 on the core rod 4.

[0047] In this embodiment, a first safety structure is provided between the first button 2 and the collar 1. The first safety structure is used to unlock the first button 2 when it is pressed at least so that the first button 2 can slide on the collar 1. A second safety structure is provided between the second button 3 and the collar 1. The second safety structure is used to unlock the second button 3 when it is pressed at least so that the second button 3 can slide on the collar 1.

[0048] When the first button 2 and the second button 3 are not pressed or are pressed only once, the first safety structure and the second safety structure can lock the first button 2 and the second button 3 respectively, preventing the first button 2 and the second button 3 from moving on the collar 1 and thus unlocking the collar 1. When the first button 2 and the second button 3 are pressed two or more times in succession, and both the first button 2 and the second button 3 are in the pressed state, the locking state of the first safety structure and the second safety structure on the first button 2 and the second button 3 is released. At this time, the first button 2 and the second button 3 can be pressed until the first limiting part 20 and the second limiting part 30 are disengaged from the toothed groove 40 on the core rod 4, thereby unlocking the collar 1 on the core rod 4.

[0049] It can be seen that the first safety structure and the second safety structure can apply a safety lock effect to the first button 2 and the second button 3, further preventing the first button 2 and the second button 3 from unlocking the collar 1 due to accidental touch.

[0050] like Figures 5-8 As shown, the locking assembly provided in this embodiment may further include a first telescopic member 7 and a second telescopic member. The first telescopic member 7 and the second telescopic member are respectively disposed on both sides of the core rod 4. A first through hole is provided at the position of the collar 1 corresponding to the first telescopic member 7, and a second through hole is provided at the position of the collar 1 corresponding to the second telescopic member; as shown Figure 6 , Figure 7 and Figure 8 As shown, the side of the first button 2 facing the collar 1 is provided with a first trigger 8. The first trigger 8 is used to pass through the first through hole and push the first telescopic member 7 to extend or retract when the first button 2 is pressed. The first telescopic member 7 is used to extend to insert into the first through hole or retract to exit from the first through hole after the pressed first button 2 is reset. The side of the second button 3 facing the collar 1 is provided with a second trigger 8. The second trigger 8 is used to pass through the second through hole and push the second telescopic member to extend or retract when the second button 3 is pressed. The second telescopic member is used to extend to insert into the second through hole or retract to exit from the second through hole after the pressed second button 3 is reset.

[0051] The first telescopic component 7 and the second telescopic component both adopt the telescopic structure found in existing push-type ballpoint pens. Since this telescopic structure is existing technology, the specific structure of the first telescopic component 7 and the second telescopic component will not be described in detail here.

[0052] To ensure that both the first and second telescopic components function at any insertion depth, such as Figure 5 and Figure 7 As shown, there can be multiple first telescopic members 7 and multiple second telescopic members, and multiple first telescopic members 7 are spaced apart along the axial direction of the core rod 4 on one side of the core rod 4, and multiple second telescopic members are spaced apart along the axial direction of the core rod 4 on the other side of the core rod 4.

[0053] Before pressing the first button 2 and the second button 3, both the first telescopic member 7 and the second telescopic member are in a shortened state and locked in the shortened state. At this time, the return spring in the first telescopic member 7 and the return spring in the second telescopic member are in a compressed and energy-storing state.

[0054] When the first button 2 and the second button 3 are pressed once, the first button 2 and the second button 3 respectively drive the first trigger 8 and the second trigger to pass through their corresponding through holes, and respectively squeeze the first telescopic member 7 and the second telescopic member, causing the first telescopic member 7 and the second telescopic member to shorten further. However, at this time, the shortened state of the first telescopic member 7 and the shortened state of the second telescopic member are both released by the triggers. If the pressing process of the first button 2 and the second button 3 is caused by accidental touch, then the first button 2 and the second button 3 are no longer under pressure. The return spring in the first telescopic member 7 and the return spring in the second telescopic member will release energy and drive the first telescopic member 7 and the second telescopic member to extend accordingly, so that the first telescopic member 7 and the second telescopic member are inserted into the first through hole and the second through hole respectively, realizing the connection between the collar 1 and the core rod 4 and limiting the collar 1, effectively preventing the failure of biopsy needle puncture positioning due to accidental button touch.

[0055] Then, only by pressing the first button 2 and the second button 3 again can the first trigger 8 and the second trigger 8 be used to squeeze the first telescopic member 7 and the second telescopic member respectively, so that the first telescopic member 7 and the second telescopic member shorten again and are locked in the shortened state. When the first telescopic member 7 and the second telescopic member are in the locked state, the first telescopic member 7 and the second telescopic member retract from the first through hole and the second through hole respectively, and no longer limit the collar 1. At this time, if the first button 2 and the second button 3 are still in the pressed state, the first limiting part 20 on the first button 2 and the second limiting part 30 on the second button 3 will also retract from the toothed groove 40 on the core rod 4, so that the first button 2 and the second button 3 no longer limit the collar 1, and the collar 1 can move on the core rod 4 to adjust the needle insertion depth.

[0056] As can be seen, the locking component provided in this embodiment also includes the first telescopic member 7 and the second telescopic member. Only by pressing the first button 2 and the second button 3 twice in succession and keeping the first button 2 and the second button 3 in the pressed state can the first telescopic member 7, the second telescopic member, the first limiting part 20 and the second limiting part 30 unlock the collar 1, so that the collar 1 can move on the core rod 4 to achieve needle depth adjustment. If the first button 2 and the second button 3 are pressed only once, the first telescopic member 7 and the second telescopic member can still limit and lock the collar 1, and the needle depth cannot be adjusted, thereby further reducing the risk of accidental button press.

[0057] like Figure 9 As shown, this embodiment also provides a biopsy needle, which includes the aforementioned locking component. The biopsy needle may further include a core rod 4, and the collar 1 in the locking component is sleeved on the core rod 4. Since the biopsy needle provided in this embodiment includes the aforementioned locking component, this biopsy needle and the aforementioned locking component can solve the same technical problem and achieve the same technical effect, and will not be described in detail here.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A locking component, characterized in that, Includes a collar (1), a first button (2), and a second button (3); The collar (1) is used to be sleeved on the core rod (4) of the biopsy needle and can move along its axial direction on the core rod (4). The first button (2) and the second button (3) are respectively disposed on both sides of the collar (1) and are slidably connected to the collar (1). The first button (2) includes a first limiting part (20) that can be connected to the core rod (4) at any position, and the second button (3) includes a second limiting part (30) that can be connected to the core rod (4) at any position. The first limiting part (20) and the second limiting part (30) are respectively used to restrict the collar (1) from moving along its axial direction on the core rod (4) when connected to the core rod (4), and to separate from the core rod (4) when the first button (2) and the second button (3) are pressed.

2. The locking component according to claim 1, characterized in that, The first button (2) further includes a first pressing part (21) and a first sliding part (22), the first pressing part (21), the first sliding part (22) and the first limiting part (20) are connected in sequence; a first sliding hole (10) is provided between the outer peripheral wall and the inner peripheral wall of the collar (1), the first sliding part (22) is slidably connected in the first sliding hole (10), the first limiting part (20) is located in the collar (1), and the first pressing part (21) is located outside the collar (1); The second button (3) further includes a second pressing part (31) and a second sliding part (32), the second pressing part (31), the second sliding part (32) and the second limiting part (30) are connected in sequence; a second sliding hole (11) is provided between the outer peripheral wall and the inner peripheral wall of the collar (1), the second sliding part (32) is slidably connected in the second sliding hole (11), the second limiting part (30) is located in the collar (1), and the second pressing part (31) is located outside the collar (1).

3. The locking component according to claim 2, characterized in that, The outer peripheral wall of the collar (1) is provided with a first clearance groove (12) at the position corresponding to the first pressing part (21), and the first pressing part (21) is located in the first clearance groove (12); The outer peripheral wall of the collar (1) is provided with a second clearance groove at the position corresponding to the second pressing part (31), and the second pressing part (31) is located in the second clearance groove.

4. The locking component according to claim 3, characterized in that, The side of the first pressing part (21) facing away from the collar (1) is located inside the first relief groove (12), and the side of the second pressing part (31) facing away from the collar (1) is located inside the second relief groove.

5. The locking component according to claim 2, characterized in that, The first limiting part (20) and the second limiting part (30) are both snap-fit ​​protrusions, and the first sliding part (22) and the second sliding part (32) are both cantilever arms, and the cantilever arms include a free end; The free end of the cantilever extends into the inside of the collar (1), and the snap-fit ​​protrusion is fixed to the arm body of the cantilever located inside the collar (1). The snap-fit ​​protrusion is used to extend into any of the multiple tooth grooves (40) distributed along the axial direction on the core rod (4) and abut against the inner peripheral wall of the tooth groove (40) along the axial direction of the core rod (4).

6. The locking component according to claim 5, characterized in that, The first button (2) further includes a first guide portion (23), the first guide portion (23) and the first sliding portion (22) are fixed on the same side of the first pressing portion (21), and the first guide portion (23) and the first sliding portion (22) are distributed at intervals along the circumference of the collar (1); a first guide hole (13) is also provided between the outer peripheral wall and the inner peripheral wall of the collar (1), and the first guide portion (23) is slidably connected in the first guide hole (13); The second button (3) also includes a second guide portion (33), the second guide portion (33) and the second sliding portion (32) are fixed on the same side of the second pressing portion (31), and the second guide portion (33) and the second sliding portion (32) are distributed at intervals along the circumference of the collar (1); a second guide hole (14) is also provided between the outer peripheral wall and the inner peripheral wall of the collar (1), and the second guide portion (33) is slidably connected in the second guide hole (14).

7. The locking component according to any one of claims 1-6, characterized in that, The first button (2) and the second button (3) are centrally symmetrical about the center point of the collar (1).

8. The locking component according to any one of claims 1-6, characterized in that, A first reset member (5) is provided between the first button (2) and the collar (1). The first reset member (5) is used to store energy when the first button (2) is pressed and slides on the collar (1). A second reset member (6) is provided between the second button (3) and the collar (1), and the second reset member (6) is used to store energy when the second button (3) is pressed and slides on the collar (1).

9. The locking component according to any one of claims 1-6, characterized in that, It also includes a first telescopic member (7) and a second telescopic member, the first telescopic member (7) and the second telescopic member are respectively disposed on both sides of the core rod (4), the collar (1) is provided with a first through hole at the position corresponding to the first telescopic member (7), and the collar (1) is provided with a second through hole at the position corresponding to the second telescopic member; The first button (2) is provided with a first trigger (8) on the side facing the collar (1). The first trigger (8) is used to pass through the first through hole and push the first telescopic member (7) to extend or shorten when the first button (2) is pressed. The first telescopic member (7) is used to extend to insert into the first through hole or shorten to exit from the first through hole after the pressed first button (2) is reset. The second button (3) is provided with a second trigger on the side facing the collar (1). The second trigger is used to pass through the second through hole and push the second telescopic member to extend or shorten when the second button (3) is pressed. The second telescopic member is used to extend to insert into the second through hole or shorten to exit from the second through hole after the pressed second button (3) is reset.

10. A biopsy needle, characterized in that, Includes the locking component as described in any one of claims 1-9.

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