CN115414077A - negative pressure biopsy needle - Google Patents

Abstract

Translated fromChinese

本发明公开了一种负压活检针，包括内针、外针、针筒、活塞杆，所述外针的针座连接在针筒的前端；活塞杆的前端位于针筒内，能够在针筒内平行于进针方向滑动；向进针方向的反向拉动活塞杆能够使针筒内形成负压；内针固定连接在活塞杆的前端；负压弹簧设置在活塞杆后端与针筒之间；上弦后，活塞杆后端连接在针筒上；所述负压活检针还包括触发机构，所述触发机构能够使活塞杆后端与针筒断开连接。本发明能够在弹簧作用下弹出活塞杆，使得针筒内产生负压，可用于甲状腺结节的活检手术；按下按钮即可弹出活塞杆，操作方便，适合单手操作。

The invention discloses a negative pressure biopsy needle, which comprises an inner needle, an outer needle, a syringe, and a piston rod. The needle seat of the outer needle is connected to the front end of the syringe; the front end of the piston rod is located in the The cylinder slides parallel to the direction of needle insertion; pulling the piston rod in the opposite direction to the needle insertion direction can form a negative pressure in the needle cylinder; the inner needle is fixedly connected to the front end of the piston rod; the negative pressure spring is arranged between the rear end of the piston rod and the needle cylinder between; after winding, the rear end of the piston rod is connected to the syringe; the negative pressure biopsy needle also includes a trigger mechanism capable of disconnecting the rear end of the piston rod from the syringe. The invention can eject the piston rod under the action of the spring, so that negative pressure is generated in the syringe, and can be used for biopsy operation of thyroid nodules; the piston rod can be ejected by pressing the button, and the operation is convenient and suitable for one-handed operation.

Description

Translated fromChinese

负压活检针negative pressure biopsy needle

技术领域technical field

本发明涉及一种负压活检针。The invention relates to a negative pressure biopsy needle.

背景技术Background technique

在甲状腺等活检手术中，需要在超声的辅助下将活检针穿刺到目标位置，再拔出内针，然后依靠虹吸作用或者注射器的负压吸取组织进入活检针中，再将穿刺针拔出人体，通过注射器将活检针的组织推出，获取组织以完成活检。In biopsy operations such as thyroid gland, it is necessary to puncture the biopsy needle to the target position with the assistance of ultrasound, then pull out the inner needle, and then rely on the siphon effect or the negative pressure of the syringe to suck the tissue into the biopsy needle, and then pull the puncture needle out of the human body , the tissue of the biopsy needle is pushed out through the syringe, and the tissue is obtained to complete the biopsy.

医生在操作时需要一手持超声探头，另一手控制活检针，由于注射器需要有抽吸动作，因此很难由单人完成操作。During the operation, the doctor needs to hold the ultrasound probe with one hand and control the biopsy needle with the other hand. Since the syringe needs to have suction action, it is difficult for a single person to complete the operation.

发明内容Contents of the invention

有鉴于此，本发明提出一种负压活检针，按下按钮即可吸取组织进入活检针中，操作方便，适合单手操作。In view of this, the present invention proposes a negative pressure biopsy needle, which can absorb tissue into the biopsy needle by pressing a button, which is easy to operate and suitable for one-handed operation.

本发明采用以下技术方案：一种负压活检针，包括内针和外针，所述负压活检针还包括针筒、活塞杆，其中：所述外针的针座连接在针筒的前端；内针固定连接在活塞杆的前端；活塞杆的前端位于针筒内，能够在针筒内平行于进针方向滑动；向进针方向的反向拉动活塞杆能够使针筒内形成负压；负压弹簧设置在活塞杆后端与针筒之间，负压弹簧的弹力方向为活塞杆后端远离针筒的方向；触发前，活塞杆后端连接在针筒上；所述负压活检针还包括触发机构，所述触发机构在触发后能够使活塞杆后端与针筒断开连接，从而使活塞杆后端远离针筒，从而在针筒内形成负压。The present invention adopts the following technical solutions: a negative pressure biopsy needle, including an inner needle and an outer needle, the negative pressure biopsy needle also includes a syringe and a piston rod, wherein: the needle seat of the outer needle is connected to the front end of the syringe ;The inner needle is fixedly connected to the front end of the piston rod; the front end of the piston rod is located in the syringe and can slide in the syringe parallel to the direction of needle insertion; pulling the piston rod in the direction opposite to the direction of needle insertion can form a negative pressure in the syringe The negative pressure spring is arranged between the rear end of the piston rod and the syringe, and the elastic direction of the negative pressure spring is the direction in which the rear end of the piston rod is away from the syringe; before triggering, the rear end of the piston rod is connected to the syringe; the negative pressure The biopsy needle also includes a trigger mechanism, which can disconnect the rear end of the piston rod from the syringe after triggering, so that the rear end of the piston rod is away from the syringe, thereby forming a negative pressure in the syringe.

优选地，所述触发机构包括按钮、触发杠杆、锁定连杆，其中：锁定连杆位于针筒的外表面，锁定连杆的后端与活塞杆的后端固定连接；锁定连杆的前端设有前钩，触发杠杆的后端设有后钩，触发杠杆中部具有支点，触发前，前钩与后钩钩在一起；按钮设置在针筒外表面，按下按钮，按钮触动触发杠杆的前端，使触发杠杆的后端向远离针筒外表面的方向运动，从而使前钩和后钩脱钩。Preferably, the trigger mechanism includes a button, a trigger lever, and a locking link, wherein: the locking link is located on the outer surface of the syringe, and the rear end of the locking link is fixedly connected to the rear end of the piston rod; the front end of the locking link is arranged There is a front hook, the rear end of the trigger lever is provided with a rear hook, and the middle part of the trigger lever has a fulcrum, before triggering, the front hook and the rear hook are hooked together; the button is set on the outer surface of the syringe, when the button is pressed, the button touches the front end of the trigger lever , so that the rear end of the trigger lever moves away from the outer surface of the syringe, thereby decoupling the front hook and the rear hook.

优选地，触发杠杆的前端与针筒外表面之间设有弹性支撑件，弹性支撑件的弹性使得前钩和后钩互相接近。Preferably, an elastic support is provided between the front end of the trigger lever and the outer surface of the syringe, and the elasticity of the elastic support makes the front hook and the rear hook approach each other.

优选地，弹性支撑件为弹簧，所述弹簧两端分别与针筒外表面以及触发杠杆相抵。Preferably, the elastic supporting member is a spring, and the two ends of the spring respectively abut against the outer surface of the syringe and the trigger lever.

优选地，弹性支撑件包括支撑体和自支撑体起向前侧延伸并且形成夹角的第一弹性臂与第二弹性臂；其中：第一弹性臂与针筒外表面相抵，第二弹性臂端部与触发杠杆相抵，第一弹性臂与第二弹性臂具有相互远离的弹力；按下按钮，按钮后端压住触发杠杆的前端，使得触发杠杆向针筒接近，从而将靠近触发杠杆的第二弹性臂的自由端压向针筒，触发杠杆绕支点转动，后端抬起，位于触发杠杆后端的后钩与锁定连杆的前钩脱钩。Preferably, the elastic support includes a support body and a first elastic arm and a second elastic arm extending from the support body to the front side and forming an angle; wherein: the first elastic arm abuts against the outer surface of the syringe, and the second elastic arm The end is against the trigger lever, and the first elastic arm and the second elastic arm have an elastic force away from each other; when the button is pressed, the rear end of the button presses the front end of the trigger lever, so that the trigger lever approaches the syringe, so that the The free end of the second elastic arm is pressed to the syringe, the trigger lever rotates around the fulcrum, the rear end lifts, and the rear hook at the rear end of the trigger lever is decoupled from the front hook of the locking link.

优选地，按钮与针筒外表面之间设有按钮弹簧。Preferably, a button spring is provided between the button and the outer surface of the syringe.

优选地，针筒的外表面上设有沿针筒轴向延伸的导向槽，锁定连杆位于导向槽内。Preferably, a guide groove extending axially along the needle cylinder is provided on the outer surface of the syringe, and the locking link is located in the guide groove.

优选地，所述负压活检针还包括卡块，卡块固定连接在针筒后部的筒壁上，卡块上靠近针筒中心的位置设有阻挡部，阻挡部阻挡在活塞杆(4)向进针方向的反向行进的路线上。Preferably, the negative pressure biopsy needle also includes a blocking block, which is fixedly connected to the cylinder wall at the rear of the syringe, and a blocking portion is provided on the blocking block near the center of the syringe, and the blocking portion blocks the piston rod (4 ) on the route going in the opposite direction to the direction of needle insertion.

优选地，所述外针的针座与针筒的前端为不可拆卸连接。Preferably, the needle seat of the outer needle is non-detachably connected to the front end of the syringe.

优选地，所述内针为实心针。Preferably, the inner needle is a solid needle.

根据本发明的技术方案，负压活检针包括内针和外针、针筒、活塞杆，外针的针座连接在针筒的前端，内针固定连接在活塞杆的前端；活塞杆的前端位于针筒内，能够在针筒内平行于进针方向滑动；负压弹簧设置在活塞杆后端与针筒之间，负压活检针还包括触发机构，触发机构能够使活塞杆后端与针筒断开连接，从而使活塞杆在弹簧的作用下向进针方向的反向弹出。本发明能够在弹簧作用下弹出活塞杆，使得针筒内产生负压，可用于甲状腺结节的活检手术。According to the technical solution of the present invention, the negative pressure biopsy needle includes an inner needle, an outer needle, a syringe, and a piston rod. The needle seat of the outer needle is connected to the front end of the syringe, and the inner needle is fixedly connected to the front end of the piston rod; It is located in the syringe and can slide parallel to the direction of needle insertion in the syringe; the negative pressure spring is arranged between the rear end of the piston rod and the syringe, and the negative pressure biopsy needle also includes a trigger mechanism, which can make the rear end of the piston rod and the syringe The needle barrel is disconnected, so that the piston rod is ejected in the opposite direction of the needle insertion direction under the action of the spring. The invention can eject the piston rod under the action of the spring, so that negative pressure can be generated in the syringe, and can be used for the biopsy operation of thyroid nodules.

附图说明Description of drawings

为了说明而非限制的目的，现在将根据本发明的优选实施例、特别是参考附图来描述本发明，其中：For purposes of illustration and not limitation, the invention will now be described according to its preferred embodiments, particularly with reference to the accompanying drawings, in which:

图1是本发明实施方式的负压活检针的立体图；1 is a perspective view of a negative pressure biopsy needle according to an embodiment of the present invention;

图2是本发明实施方式的负压活检针的剖视图(剖切面垂直于按钮弹簧中心线)。Fig. 2 is a sectional view of the negative pressure biopsy needle according to the embodiment of the present invention (the sectional plane is perpendicular to the center line of the button spring).

图3是本发明实施方式的负压活检针的剖视图(剖切面通过按钮弹簧中心线)；3 is a sectional view of the negative pressure biopsy needle according to the embodiment of the present invention (the sectional plane passes through the center line of the button spring);

图4是图3的局部放大图。FIG. 4 is a partially enlarged view of FIG. 3 .

图中，1-外针，2-针筒，21-伸出部，211-后表面，3-内针，4-活塞杆，41-滑块，42-杆体，43-推动部，431-前表面，5-负压弹簧，6-锁定连杆，61-前钩，7-触发杠杆，71-支点，72-后钩，8-按钮，81-触点，9-卡块，91-阻挡部，10-导向槽，11-弹性支撑件，111-支撑体，112-第一弹性臂，113-第二弹性臂，12-按钮弹簧。In the figure, 1-outer needle, 2-needle cylinder, 21-extending part, 211-rear surface, 3-inner needle, 4-piston rod, 41-slider, 42-rod body, 43-pushing part, 431- Front surface, 5-negative pressure spring, 6-locking link, 61-front hook, 7-trigger lever, 71-fulcrum, 72-rear hook, 8-button, 81-contact, 9-block, 91- Blocking part, 10-guiding groove, 11-elastic support member, 111-support body, 112-first elastic arm, 113-second elastic arm, 12-button spring.

具体实施方式detailed description

请参见图1、图2，图1是本发明实施方式的负压活检针的立体图；Please refer to Fig. 1 and Fig. 2, Fig. 1 is a perspective view of a negative pressure biopsy needle according to an embodiment of the present invention;

图2是本发明实施方式的负压活检针的剖视图(剖切面垂直于按钮弹簧中轴线)；本发明实施方式负压活检针的外针1的针座与针筒2的前端连接，活检针进针方向指向一端为前；内针3固定连接在活塞杆4上。活塞杆4前端设有滑块41，活塞杆4的中部为杆体42，活塞杆4的后端设有推动部43；滑块41和杆体42位于针筒2内，滑块41的外径等于针筒2的内径，使滑块41能够在针筒2内前后滑动，起到活塞头的作用。针筒2的后部设置有卡块9，以防止活塞杆4滑动到最后端时从针筒2脱离。卡块9固定连接在针筒2后部的筒壁上，卡块9上靠近针筒2中心的位置设有阻挡部91，阻挡部91阻挡在滑块41向进针方向的反向行进的路线上。Fig. 2 is the cross-sectional view of the negative pressure biopsy needle of the embodiment of the present invention (the cut plane is perpendicular to the central axis of the button spring); The direction of needle insertion points to one end as the front; theinner needle 3 is fixedly connected to thepiston rod 4 . The front end of thepiston rod 4 is provided with aslide block 41, the middle part of thepiston rod 4 is arod body 42, and the rear end of thepiston rod 4 is provided with apusher 43; theslide block 41 and therod body 42 are located in thesyringe 2, and the outer diameter of theslide block 41 is equal to The inner diameter of thesyringe 2 enables theslide block 41 to slide back and forth in thesyringe 2 to function as a piston head. Ablock 9 is provided at the rear of thesyringe 2 to prevent thepiston rod 4 from being separated from thesyringe 2 when it slides to the rearmost end. Theclamping block 9 is fixedly connected to the cylinder wall at the rear of thesyringe 2, and a blockingportion 91 is provided on theclamping block 9 close to the center of thesyringe 2, and the blockingportion 91 blocks the movement of theslider 41 in the reverse direction of the needle insertion direction. on the route.

针筒2后端向远离针筒2中轴线的方向延伸形成伸出部21；负压弹簧5套在活塞杆4的杆体42上，两端分别抵在伸出部21的后表面211和推动部43的前表面431；负压弹簧5伸长释放时推动活塞杆4向进针方向的反向运动使得针筒2内产生负压。The rear end of thesyringe 2 extends away from the central axis of thesyringe 2 to form aprotruding part 21; thenegative pressure spring 5 is sleeved on therod body 42 of thepiston rod 4, and the two ends respectively abut against therear surface 211 of the protrudingpart 21 and push Thefront surface 431 of thepart 43; when thenegative pressure spring 5 is stretched and released, the reverse movement of thepiston rod 4 to the needle insertion direction is pushed to generate a negative pressure in thesyringe 2.

锁定连杆6位于针筒2的外表面，与针筒2平行，锁定连杆6的后端与活塞杆4的后端固定连接。针筒2的外表面上设有沿针筒2轴向延伸的导向槽10，锁定连杆6能够在导向槽10内滑动。Thelocking link 6 is located on the outer surface of thesyringe 2 and parallel to thesyringe 2 , and the rear end of thelocking link 6 is fixedly connected to the rear end of thepiston rod 4 . Aguide groove 10 extending axially along theneedle cylinder 2 is provided on the outer surface of theneedle cylinder 2 , and thelocking link 6 can slide in theguide groove 10 .

请参见图3、图4，图3是本发明实施方式的负压活检针的剖视图(剖切面通过按钮弹簧中轴线)；图4是图3的局部放大图；按钮8设置在针筒2外表面，按钮8与针筒2外表面之间设有按钮弹簧12；按钮8上设有触点81，按下按钮8，触点81与触发杠杆7的前端触碰；触发杠杆7的后端设有后钩72，锁定连杆6的前端设有前钩61。Please refer to Fig. 3 and Fig. 4, Fig. 3 is a sectional view of the negative pressure biopsy needle according to the embodiment of the present invention (the sectional plane passes through the central axis of the button spring); Fig. 4 is a partially enlarged view of Fig. 3; thebutton 8 is arranged outside thesyringe 2 On the surface, abutton spring 12 is provided between thebutton 8 and the outer surface of thesyringe 2; acontact 81 is provided on thebutton 8, and when thebutton 8 is pressed, thecontact 81 touches the front end of the trigger lever 7; the rear end of the trigger lever 7 Arear hook 72 is provided, and afront hook 61 is provided at the front end of thelocking link 6 .

触发杠杆7与针筒2外表面之间设有弹性支撑件11，弹性支撑件11包括支撑体111和自支撑体111起向前侧延伸并且形成夹角的第一弹性臂112与第二弹性臂113。第一弹性臂112与针筒2外表面相抵，第二弹性臂113端部与触发杠杆7相抵，第一弹性臂112与第二弹性臂113具有相互远离的弹力。弹性支撑件11也可以采用弹簧，该弹簧两端分别与针筒2外表面以及触发杠杆7相抵。在按下按钮8之前，由于弹性支撑件11的作用，后钩72与前钩61钩在一起。Anelastic support member 11 is provided between the trigger lever 7 and the outer surface of thesyringe 2. Theelastic support member 11 includes asupport body 111 and a firstelastic arm 112 extending forward from thesupport body 111 and forming an included angle with a secondelastic arm 112 .arm 113. The firstelastic arm 112 abuts against the outer surface of thesyringe 2 , the end of the secondelastic arm 113 abuts against the trigger lever 7 , and the firstelastic arm 112 and the secondelastic arm 113 have elastic forces to move away from each other. The elastic supportingmember 11 can also adopt a spring, and the two ends of the spring respectively abut against the outer surface of thesyringe 2 and the trigger lever 7 . Before thebutton 8 is pressed, therear hook 72 is hooked together with thefront hook 61 due to the action of theelastic support member 11 .

触发杠杆7的中部靠近针筒2一侧设有支点71；按下按钮8，触点81压住触发杠杆7的前端，使得触发杠杆7向针筒2接近，从而将靠近触发杠杆7的第二弹性臂113的自由端压向针筒2，由于支点71的存在，触发杠杆7的后端抬起(按图4视角是向右方抬起)，位于触发杠杆7后端的后钩72与锁定连杆6的前钩61脱钩。第一弹性臂112和第二弹性臂113的设置是为了使后钩72与前钩61稳定地钩在一起，并且只有专门施加一定力度按在按钮8上，后钩72与前钩61才能脱钩。The middle part of the trigger lever 7 is provided with afulcrum 71 close to the side of thesyringe 2; when thebutton 8 is pressed, thecontact point 81 presses the front end of the trigger lever 7, so that the trigger lever 7 approaches thesyringe 2, so that the first side close to the trigger lever 7 The free ends of twoelastic arms 113 are pressed toward thesyringe 2, and due to the existence of thefulcrum 71, the rear end of the trigger lever 7 is lifted (it is lifted to the right according to the viewing angle of Fig. 4 ), and therear hook 72 positioned at the rear end of the trigger lever 7 and Thefront hook 61 of thelocking link 6 is unhooked. The setting of the firstelastic arm 112 and the secondelastic arm 113 is to make therear hook 72 and thefront hook 61 hook together stably, and only when a certain force is applied and pressed on thebutton 8, therear hook 72 and thefront hook 61 can be unhooked. .

为了提高使用安全，外针1的针座与针筒2的前端优选固定不可拆的连接方式。内针3优选实心针，实心针更方便通过内针3将外针1中的人体组织推出。In order to improve the safety of use, the needle seat of the outer needle 1 and the front end of thesyringe 2 are preferably fixed and non-detachable. Theinner needle 3 is preferably a solid needle, which is more convenient to push out the human tissue in the outer needle 1 through theinner needle 3 .

本发明实施方式的负压活检针的使用方法如下：The using method of the negative pressure biopsy needle of the embodiment of the present invention is as follows:

1、上弦：按动推动部43从而压缩负压弹簧5，使得锁定连杆6向前运动，从而前钩61和触发杠杆7的后钩72钩在一起。1. Winding: Press the pushingpart 43 to compress thenegative pressure spring 5, so that thelocking link 6 moves forward, so that thefront hook 61 and therear hook 72 of the trigger lever 7 are hooked together.

2、医生一手操作超声探头，另一手操作负压活检针，将负压活检针的外针1的针尖在超声影像引导下刺入结节部位。2. The doctor operates the ultrasound probe with one hand and the negative pressure biopsy needle with the other hand, and inserts the needle tip of the outer needle 1 of the negative pressure biopsy needle into the nodule under the guidance of the ultrasound image.

3、触发：医生单手按下按钮8后，后钩72与前钩61脱钩，在负压弹簧5的推力下活塞杆4弹出，使针筒2内产生负压，从而结节内的人体组织被吸入外针1中。3. Trigger: After the doctor presses thebutton 8 with one hand, therear hook 72 is decoupled from thefront hook 61, and thepiston rod 4 pops up under the thrust of thenegative pressure spring 5, so that negative pressure is generated in thesyringe 2, so that the human body in the nodule Tissue is drawn into the outer needle 1.

4、拔出负压活检针，推动活塞杆4，通过内针3将外针1中的细胞推出，完成活检取样。4. Pull out the negative pressure biopsy needle, push thepiston rod 4, push out the cells in the outer needle 1 through theinner needle 3, and complete the biopsy sampling.

根据本发明实施方式的技术方案，负压弹簧5伸长释放时推动活塞杆4向进针方向的反向运动使得针筒2内产生负压，本发明可用于甲状腺结节的活检手术。According to the technical solution of the embodiment of the present invention, when thenegative pressure spring 5 is stretched and released, the reverse movement of thepiston rod 4 to the needle insertion direction will cause negative pressure to be generated in thesyringe 2, and the present invention can be used for biopsy of thyroid nodules.

根据本发明实施方式的技术方案，按钮8设置在针筒2外表面，手指按下按钮8，触点81压住触发杠杆7的前端，使得触发杠杆7绕支点71转动，后端抬起，位于触发杠杆7后端的后钩72与锁定连杆6的前钩61脱钩，在弹簧的弹力作用下，活塞杆4向进针方向的反向弹出，操作方便，适合单手操作，方便了医生活检取样工作。According to the technical solution of the embodiment of the present invention, thebutton 8 is arranged on the outer surface of thesyringe 2, and the finger presses thebutton 8, and thecontact 81 presses the front end of the trigger lever 7, so that the trigger lever 7 rotates around thefulcrum 71, and the rear end is lifted. Therear hook 72 located at the rear end of the trigger lever 7 is decoupled from thefront hook 61 of thelocking link 6. Under the elastic force of the spring, thepiston rod 4 pops up in the opposite direction of the needle insertion direction. The operation is convenient and suitable for one-handed operation, which is convenient for doctors. Biopsy sampling work.

上述具体实施方式，并不构成对本发明保护范围的限制。本领域技术人员应该明白的是，取决于设计要求和其他因素，可以发生各种各样的修改、组合、子组合和替代。任何在本发明的精神和原则之内所作的修改、等同替换和改进等，均应包含在本发明保护范围之内。The above specific implementation methods do not constitute a limitation to the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

Translated fromChinese

1.一种负压活检针，包括内针(3)和外针(1)，其特征在于，所述负压活检针还包括针筒(2)、活塞杆(4)，其中：1. A negative pressure biopsy needle, comprising an inner needle (3) and an outer needle (1), is characterized in that, said negative pressure biopsy needle also includes a syringe (2), a piston rod (4), wherein:所述外针(1)的针座连接在针筒(2)的前端；The needle seat of the outer needle (1) is connected to the front end of the syringe (2);内针(3)固定连接在活塞杆(4)的前端；The inner needle (3) is fixedly connected to the front end of the piston rod (4);活塞杆(4)的前端位于针筒(2)内，能够在针筒(2)内平行于进针方向滑动；向进针方向的反向拉动活塞杆(4)能够使针筒(2)内形成负压；The front end of the piston rod (4) is located in the needle cylinder (2), and can slide parallel to the direction of needle insertion in the needle cylinder (2); pulling the piston rod (4) in the direction opposite to the direction of needle insertion can make the needle cylinder (2) Negative pressure is formed inside;负压弹簧(5)设置在活塞杆(4)后端与针筒(2)之间，负压弹簧(5)的弹力方向为活塞杆(4)后端远离针筒(2)的方向；The negative pressure spring (5) is arranged between the rear end of the piston rod (4) and the syringe (2), and the elastic direction of the negative pressure spring (5) is the direction in which the rear end of the piston rod (4) is away from the syringe (2);触发前，活塞杆(4)后端连接在针筒(2)上；所述负压活检针还包括触发机构，所述触发机构在触发后能够使活塞杆(4)后端与针筒(2)断开连接，从而使活塞杆(4)后端远离针筒(2)，从而在针筒(2)内形成负压。Before triggering, the rear end of the piston rod (4) is connected to the syringe (2); the negative pressure biopsy needle also includes a trigger mechanism, which can make the rear end of the piston rod (4) contact the syringe (2) after triggering. 2) Disconnect, so that the rear end of the piston rod (4) is away from the syringe (2), thereby forming a negative pressure in the syringe (2).2.根据权利要求1所述的负压活检针，其特征在于，所述触发机构包括按钮(8)、触发杠杆(7)、锁定连杆(6)，其中：2. The negative pressure biopsy needle according to claim 1, characterized in that, the trigger mechanism comprises a button (8), a trigger lever (7), and a locking link (6), wherein:锁定连杆(6)位于针筒(2)的外表面，锁定连杆(6)的后端与活塞杆(4)的后端固定连接；The locking connecting rod (6) is located on the outer surface of the syringe (2), and the rear end of the locking connecting rod (6) is fixedly connected with the rear end of the piston rod (4);锁定连杆(6)的前端设有前钩(61)，触发杠杆(7)的后端设有后钩(72)，触发杠杆(7)中部具有支点(71)，触发前，前钩(61)与后钩(72)钩在一起；The front end of the locking link (6) is provided with a front hook (61), the rear end of the trigger lever (7) is provided with a rear hook (72), and the middle part of the trigger lever (7) has a fulcrum (71). Before the trigger, the front hook ( 61) hook together with the back hook (72);按钮(8)设置在针筒(2)外表面，按下按钮(8)，按钮(8)触动触发杠杆(7)的前端，使触发杠杆(7)的后端向远离针筒(2)外表面的方向运动，从而使前钩(61)和后钩(72)脱钩。The button (8) is arranged on the outer surface of the syringe (2), when the button (8) is pressed, the button (8) touches the front end of the trigger lever (7), so that the rear end of the trigger lever (7) moves away from the syringe (2) Direction movement of the outer surface, thereby decoupling the front hook (61) and the rear hook (72).3.根据权利要求2所述的负压活检针，其特征在于，触发杠杆(7)的前端与针筒(2)外表面之间设有弹性支撑件(11)，弹性支撑件(11)的弹性使得前钩(61)和后钩(72)互相接近。3. The negative pressure biopsy needle according to claim 2, characterized in that an elastic support (11) is provided between the front end of the trigger lever (7) and the outer surface of the syringe (2), and the elastic support (11) The elasticity of the front hook (61) and the rear hook (72) are close to each other.4.根据权利要求3所述的负压活检针，其特征在于，弹性支撑件(11)为弹簧，所述弹簧两端分别与针筒(2)外表面以及触发杠杆(7)相抵。4. The negative pressure biopsy needle according to claim 3, characterized in that the elastic support member (11) is a spring, and the two ends of the spring are respectively offset against the outer surface of the syringe (2) and the trigger lever (7).5.根据权利要求3所述的负压活检针，其特征在于，弹性支撑件(11)包括支撑体(111)和自支撑体(111)起向前侧延伸并且形成夹角的第一弹性臂(112)与第二弹性臂(113)；其中：5. The negative pressure biopsy needle according to claim 3, characterized in that the elastic support (11) comprises a support body (111) and a first elastic body extending from the support body (111) to the front and forming an included angle. arm (112) and second elastic arm (113); wherein:第一弹性臂(112)与针筒(2)外表面相抵，第二弹性臂(113)端部与触发杠杆(7)相抵，第一弹性臂(112)与第二弹性臂(113)具有相互远离的弹力；The first elastic arm (112) is against the outer surface of the syringe (2), the end of the second elastic arm (113) is against the trigger lever (7), and the first elastic arm (112) and the second elastic arm (113) have Elasticity away from each other;按下按钮(8)，按钮(8)后端压住触发杠杆(7)的前端，使得触发杠杆(7)向针筒(2)接近，从而将靠近触发杠杆(7)的第二弹性臂(113)的自由端压向针筒(2)，触发杠杆(7)绕支点(71)转动，后端抬起，位于触发杠杆(7)后端的后钩(72)与锁定连杆(6)的前钩(61)脱钩。Press the button (8), the rear end of the button (8) presses the front end of the trigger lever (7), so that the trigger lever (7) approaches the syringe (2), thereby closing the second elastic arm close to the trigger lever (7) The free end of (113) is pressed to syringe (2), and trigger lever (7) rotates around fulcrum (71), and rear end lifts, and the rear hook (72) that is positioned at trigger lever (7) rear end and locking link (6 ) of the front hook (61) decoupling.6.根据权利要求2所述的负压活检针，其特征在于，按钮(8)与针筒(2)外表面之间设有按钮弹簧(12)。6. The negative pressure biopsy needle according to claim 2, characterized in that a button spring (12) is provided between the button (8) and the outer surface of the syringe (2).7.根据权利要求2至6中任一项所述的负压活检针，其特征在于，针筒(2)的外表面上设有沿针筒(2)轴向延伸的导向槽(10)，锁定连杆(6)位于导向槽(10)内。7. The negative pressure biopsy needle according to any one of claims 2 to 6, characterized in that, the outer surface of the syringe (2) is provided with a guide groove (10) extending axially along the syringe (2) , the locking link (6) is located in the guide groove (10).8.根据权利要求7所述的负压活检针，其特征在于，所述负压活检针还包括卡块(9)，卡块(9)固定连接在针筒(2)后部的筒壁上，卡块(9)上靠近针筒(2)中心的位置设有阻挡部(91)，阻挡部(91)阻挡在活塞杆(4)向进针方向的反向行进的路线上。8. The negative pressure biopsy needle according to claim 7, characterized in that, the negative pressure biopsy needle further comprises a block (9), and the block (9) is fixedly connected to the barrel wall at the rear of the syringe (2) On the clamping block (9), a blocking portion (91) is provided near the center of the syringe (2), and the blocking portion (91) blocks the path of the piston rod (4) traveling in the direction opposite to the needle insertion direction.9.根据权利要求1所述的负压活检针，其特征在于，所述外针(1)的针座与针筒(2)的前端为不可拆卸连接。9. The negative pressure biopsy needle according to claim 1, characterized in that, the needle seat of the outer needle (1) is non-detachably connected to the front end of the syringe (2).10.根据权利要求1所述的负压活检针，其特征在于，所述内针(3)为实心针。10. The negative pressure biopsy needle according to claim 1, characterized in that, the inner needle (3) is a solid needle.

Images