WO2021102766A1 - 一种吸烟电刀的可伸缩结构 - Google Patents

一种吸烟电刀的可伸缩结构 Download PDF

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Publication number
WO2021102766A1
WO2021102766A1 PCT/CN2019/121393 CN2019121393W WO2021102766A1 WO 2021102766 A1 WO2021102766 A1 WO 2021102766A1 CN 2019121393 W CN2019121393 W CN 2019121393W WO 2021102766 A1 WO2021102766 A1 WO 2021102766A1
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Prior art keywords
collar
limit
electric knife
smoking
telescopic structure
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Application number
PCT/CN2019/121393
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English (en)
French (fr)
Inventor
邹强
卢孔佩
郝泰
刘雨
苏英
Original Assignee
浙江舒友仪器设备有限公司
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Application filed by 浙江舒友仪器设备有限公司 filed Critical 浙江舒友仪器设备有限公司
Priority to PCT/CN2019/121393 priority Critical patent/WO2021102766A1/zh
Priority to US17/775,603 priority patent/US20220387096A1/en
Publication of WO2021102766A1 publication Critical patent/WO2021102766A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/148—Probes or electrodes therefor having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00982—General structural features
    • A61B2017/00991—Telescopic means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00184—Moving parts
    • A61B2018/00196—Moving parts reciprocating lengthwise
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00601—Cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/033—Abutting means, stops, e.g. abutting on tissue or skin
    • A61B2090/034—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration
    • A61B2218/008—Aspiration for smoke evacuation

Definitions

  • the invention relates to the field of medical equipment, in particular to a telescopic structure of a smoking electric knife.
  • the electrosurgical knife has basically replaced the mechanical scalpel. It cuts extremely quickly, has a good hemostasis effect, and can automatically disinfect the wound.
  • the electrosurgical knife is easy to vaporize the body tissues during use, and produce a large amount of gas, which is easy for the surgeon to inhale, which is harmful to health.
  • the generated gas leads to unclear surgical vision, and the electrodes of the surgical electrosurgical knife are often blocked by the handle or the surgeon's hands, which affects the surgical operation, and even causes accidental injuries and electric burns.
  • smoking electrocautery has appeared, by setting a cigarette tube in the handle, and then connecting a suction device at the distal end of the cigarette tube, and then the gas generated during the operation can be sucked away automatically or manually.
  • companies with multiple brands at home and abroad are launching smoking electrosurgical pens.
  • the purpose is to make the electrosurgical pens have the function of sucking out harmful smoke during surgery.
  • they in order to meet the technical requirements for the use of smoking electrosurgical pens, they have also launched special
  • the clinical significance of the telescopic smoking knife with a smoking tube is to meet the needs of different depths of operation sites, which can facilitate the doctor to adjust the length of the smoking tube at any time according to the different surgical sites during the operation, so as to ensure the smoking effect.
  • Patent CN201720431517.5 discloses an adjustable smokeless surgical electrosurgical knife, which includes a handle and an electrosurgical knife connected to the handle.
  • a smoke tube is arranged in the handle, and a shaft body arranged along its length is arranged in the handle.
  • the smoke pipe is fixedly connected with the shaft body by a connecting component, the smoke pipe is rotatable around the shaft body, and the smoke pipe includes a first pipe body portion, a telescopic portion, and a second pipe body portion that are integrally connected
  • the end of the second tube body extends to the outside of the handle for absorbing gas, and a push button and a rotary button are arranged outside the handle, and the push button is arranged in linkage with the shaft body, which is used to make the smoke tube Telescopic and elongated
  • the knob is arranged in linkage with the connecting assembly, and is used to rotate the cigarette tube around the shaft in the handle to adjust the position of the cigarette tube.
  • the above-mentioned patent relates to a smokeless electric surgical knife with adjustable length.
  • the above-mentioned telescopic structure adopts a telescopic tube, and the length of the stretchable tube is relatively limited during use, and there is inconvenience during use.
  • a retractable structure of a smoking electric knife is provided.
  • a telescopic structure of a smoking electric knife comprising an electric knife pen body, the inside of the electric knife pen body is hollow and one end is provided with an opening, the opening end of the electric knife pen body is provided with a limit connection part, and the limit connection part is provided with a jacket There is a sleeve ring, and an elastic limit member is arranged between the limit connecting part and the sleeve ring.
  • the telescopic structure of the smoking electric knife further includes the inner part of the sleeve ring, the elastic limit member and the body of the electric knife pen in turn. Connected channels.
  • a smoking pipe is arranged in the passage.
  • the above structure realizes the telescopic function of the smoking electrosurgical pen during use.
  • the user moves the sleeve backwards to make the sleeve ring and the upper limit connection part of the electrosurgical pen body relatively displace, so as to limit the position.
  • the front end of the connecting part exerts a pressure on the elastic limit piece, the pressure of the limit connecting portion acting on the elastic limit piece deforms the elastic limit piece, and the deformed elastic limit piece makes the elastic limit piece available
  • the diameter of the passage through which the smoking pipe passes becomes larger, so that the smoking pipe can be extended or retracted in the passage.
  • the length of the smoking knife and the position of the smoking pipe are adjusted. After the position of the smoking pipe is determined, the hand loosens the collar.
  • the elastic limiter Under the action of the pressure, the elastic limiter starts to reset.
  • the reset of the elastic limiter makes the collar and the limit connecting part return to the original relative position.
  • the elastic limiter restricts the smoking pipe due to the reduced channel diameter after reset. , So that it is fixed and will not shift up and down when in use.
  • the limit connection part is provided with a limit block at an end away from the body of the electric knife pen.
  • the front end of the limit block bears against the inner side of the elastic limit piece, and the limit block is clamped in the collar, so that the collar can be stably sleeved on the limit connection part, and the relative position of the collar and the limit connection part is ensured.
  • the limiting block conflicts with the elastic limiting member at an end away from the body of the electrosurgical pen.
  • the limit block slides in the sleeve ring when the sleeve ring moves backward, and the front end of the limit block generates pressure on the elastic limit piece, The elastic limiting member is deformed so that the smoking pipe arranged in the passage can be stretched back and forth.
  • the smoking tube communicates with the electric knife pen body through a channel provided on the electric knife pen body, the sleeve ring, and the elastic limiting member.
  • a protruding part is provided on the inner side of one end of the collar near the body of the electrosurgical pen, and the inner surface of the protruding part is in contact with the limiting block.
  • the above-mentioned protruding part is arranged to set the limit connecting part in the collar to play a role of fixing and limiting.
  • the collar is provided with a limiting groove for installing the limiting connecting portion, and the distance between the front end surface and the rear end surface of the limiting groove is greater than the distance between the front end surface and the rear end surface of the limiting block.
  • the setting of the above spacing facilitates the installation of the limit block and the elastic limit piece, and reserves a part of the reserved space for the elastic limit piece to deform after being squeezed.
  • the collar is provided with an installation groove for installing the elastic limit member, and the installation groove is arranged at a distance of 0-1 cm from the front end surface of the limit groove.
  • the above-mentioned structural arrangement allows the limit connecting portion to be relatively displaced with the sleeve ring when the sleeve ring is moved backwards, so that the limit block pushes the elastic limit piece to make it deform. After the deformation, the diameter of the passage through which the smoking pipe passes is changed. Large, the smoking pipe can be expanded and contracted.
  • the elastic limiting member is arranged in an annular shape, the longitudinal section of the elastic limiting member is a concave arc shape, and the center of the elastic limiting member is provided with a passage through which the smoking pipe can pass.
  • the collar includes a collar main body and a collar inner sleeve, the collar inner sleeve is clamped on the inner side of the collar main body, and elasticity is provided between the rear side of the collar main body and the front end surface of the collar inner sleeve. Limit pieces.
  • the inner sleeve of the collar is provided with a limiting portion protruding inwardly for matching with the limiting connecting portion.
  • the telescopic structure of the smoking electric knife enables the smoking electric knife to realize one-handed adjustment of the length of the smoking knife when in use, which is more convenient in use and more convenient to operate.
  • the telescopic structure of the smoking knife is simple in structure and convenient to use.
  • the above-mentioned structure uses a loop structure, which increases the comfort of the hand during use, increases the comfort of the user during use, and is convenient for the user to adjust.
  • Figure 1 is a schematic side view of the telescopic structure of a smoking electric knife according to the present invention
  • Figure 2 is a schematic structural view of the telescopic structure of a smoking electric knife according to the present invention.
  • Figure 3 is a schematic structural diagram of the telescopic structure of a smoking electric knife according to the present invention.
  • Fig. 4 is a schematic diagram of the elastic limit member of the telescopic structure of a smoking electric knife of the present invention.
  • a telescopic structure of a smoking electric knife includes an electric knife pen body 1.
  • the electric knife pen body 1 is hollow and has an opening at one end, and the open end of the electric knife pen body 1
  • a limit connecting portion 2 is provided, the limit connecting portion 2 is covered with a collar 3
  • an elastic limit piece 4 is arranged between the limit connecting portion 2 and the collar 3
  • the telescopic structure of the smoking electric knife is also It includes a channel 6 that sequentially penetrates the collar 3 and the elastic limit member 4 and communicates with the inside of the electrosurgical pen body 1.
  • the limit connecting portion 2 is provided with a limit block 21 at an end away from the body 1 of the electrosurgical pen.
  • the limiting block 21 conflicts with the elastic limiting member 4 at the end away from the electric knife pen body 1
  • a smoking pipe 5 is provided in the passage provided on the electric knife pen body 1, the collar 3 and the elastic limit member 4.
  • the above-mentioned smoking pipe achieves expansion and contraction and positioning through the change of the aperture size of the channel on the elastic limit member when the user is in use.
  • a raised portion 31 is provided on the inner side of the rear end of the collar 3, and the inner side surface of the raised portion 31 is in contact with the rear end surface of the stop block 21.
  • the collar 3 is provided with a limiting groove 32 for installing the limiting connecting portion 2, and the distance between the front end surface and the rear surface of the limiting groove 32 is greater than the distance between the front end surface and the rear surface of the limiting block 21 Pitch.
  • the collar 3 is provided with an installation groove 33 for installing the elastic limit member 4, and the installation groove 33 is 0-1 cm away from the front end surface of the limit groove 32, preferably 0.1 cm. In another embodiment, the installation groove 33 is 0.2 cm away from the front end surface of the limiting groove 32. In another embodiment, the installation groove 33 is 0.3 cm away from the front end surface of the limiting groove 32.
  • the elastic limiting member 4 may be annular, the longitudinal section of the elastic limiting member 4 may be a concave arc shape, and the passage through which the smoking pipe 5 can pass is located at the center of the elastic limiting member 4.
  • the collar 3 includes a collar body 34 and a collar inner sleeve 35.
  • the collar inner sleeve 35 is clamped on the inner side of the collar body 34.
  • the rear side of the collar body 34 and the front end surface of the collar inner sleeve 35 are different from each other.
  • the inner sleeve 35 of the collar is provided with a limiting portion 351 protruding inward for matching with the limiting connecting portion 2.

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  • Life Sciences & Earth Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Animal Behavior & Ethology (AREA)
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Abstract

一种吸烟电刀的可伸缩结构，包括电刀笔笔身（1），电刀笔笔身（1）的内部中空且一端设置有开口，电刀笔笔身（1）的开口端设置有限位连接部（2），限位连接部（2）外套设有套环（3），限位连接部（2）与套环（3）之间设置有弹性限位件（4），吸烟电刀的可伸缩结构还包括依次贯穿套环（3）、弹性限位件（4）并与电刀笔笔身（1）的内部连通的通道（6）。吸烟电刀的可伸缩结构，使吸烟电刀在使用时可以实现单手调节吸烟刀长度，在使用时更加便捷，操作更方便。

Description

一种吸烟电刀的可伸缩结构 技术领域
本发明涉及医疗器械领域，特别涉及一种吸烟电刀的可伸缩结构。
背景技术
目前手术电刀已基本取代了机械手术刀，其切割极为迅速，而且止血效果好，同时又能使伤口边自动消毒。但是，手术电刀在使用过程中易使肌体组织气化，产生大量气体，术者容易吸入，有害身体健康。另一方面，产生的气体导致手术视野不清晰，手术电刀的电极又常被手柄或术者的手挡住，影响手术操作，甚至产生误伤、电灼伤等。为此，现出现了吸烟电刀，通过在手柄内设置烟管，然后在烟管的远端连接吸引器，然后可以自动或手动的将手术时产生的气体吸走。目前，国内外有多个品牌的公司在推出可吸烟电刀笔，目的是为了让电刀笔具有可吸除手术中有害烟雾的功能，其中，为了满足对可吸烟电刀笔的技术使用需求还特别推出了吸烟管可伸缩的吸烟刀，其临床意义是为了满足不同深浅的手术部位的需求，可以方便医生在手术过程中根据手术部位的不同随时调节吸烟管的长度，保证吸烟效果。
专利CN201720431517.5公开了一种可调节的无烟手术电刀，包括手柄和与手柄连接的电刀，在手柄内设有烟管，在所述手柄内设有沿其长度方向设置的轴体，所述烟管与所述轴体通过连接组件固定连接，所述烟管可绕所述轴体转动，所述烟管包括一体连接的第一管体部、伸缩部和第二管体部，所述第二管体部的端部延伸至手柄外用于吸收气体，在所述手柄外设有推钮和转钮，所述推钮与所述轴体联动设置，其用于使烟管伸缩拉长，所述转钮与所述连接组件联动设置，其用于使所述烟管在所述手柄内绕所述轴体转动而调整所述烟管的位置。上述专利涉及了一种长度可调节的无烟手术电刀，上述的伸缩结构采用伸缩管，在使用过程中可伸长的长度局限性较大，在使用过程中存在不便。
发明概述
技术问题
问题的解决方案
技术解决方案
根据上述提出的技术问题，而提供一种吸烟电刀的可伸缩结构。
本发明采取的技术手段如下：
一种吸烟电刀的可伸缩结构，包括电刀笔笔身，所述电刀笔笔身的内部中空且一端设置有开口，电刀笔笔身的开口端设置有限位连接部，限位连接部外套设有套环，所示限位连接部与套环之间设置有弹性限位件，所述吸烟电刀的可伸缩结构还包括依次贯穿套环、弹性限位件并与电刀笔笔身的内部连通的通道。
作为优选，所述通道内设置有吸烟管。
上述结构实现了吸烟电刀笔在使用过程中的可伸缩功能，在使用时，使用者通过向后拨动套环的动作使套环和电刀笔笔身上限位连接部发生相对位移，使得限位连接部的前端部对弹性限位件产生一个压力，限位连接部作用在弹性限位件上的压力使弹性限位件发生形变，形变后的弹性限位件使得弹性限位件上可供吸烟管通过的通道的直径变大，使吸烟管在通道中可以伸出或者缩进，进行吸烟刀长度和吸烟管位置的调整，在确定吸烟管位置后，手松开套环，由于在没有压力的作用下弹性限位件开始进行复位，弹性限位件的复位使得套环和限位连接部恢复到原来的相对位置，弹性限位件由于复位后通道口径变小对吸烟管进行限位，使其在使用时固定不会上下偏移。
作为优选，所述限位连接部在远离电刀笔笔身的一端设置有限位块。
上述限位块前端顶住弹性限位件内侧，限位块卡设在套环内，使得套环可以稳固的套设在限位连接部上，保证套环和限位连接部的相对位置。
作为优选，所述限位块在远离电刀笔笔身的一端与弹性限位件相抵触。
所述限位块由于套环和限位连接部之间的相对位置会发生变化，在套环向后移动时限位块在套环内滑动，限位块的前端对弹性限位件产生压力，使弹性限位件发生形变使得设置在通道中的吸烟管可以进行前后伸缩。
作为优选，所述吸烟管通过设置在电刀笔笔身、套环、弹性限位件上开设的通道与在电刀笔笔身相连通。
作为优选，所述套环近电刀笔笔身的一端内侧设置有凸起部，所述凸起部内侧 面与限位块相接触。
上述凸起部的设置是为了将限位连接部设置于套环内，起到固定和限位作用。
作为优选，所述套环内设有安装限位连接部的限位槽，所述限位槽的前端面和后端面之间的间距大于限位块的前端面和后端面之间的间距。
上述间距的设置便于限位块和弹性限位件的安装，并且预留了一部分弹性限位件在受到挤压后发生形变的预留空间。
作为优选，所述套环上开设有用于安装弹性限位件的安装槽，所述安装槽设置在距限位槽前端面0-1cm处。
上述结构设置使得限位连接部可以在套环向后拨动的情况下与套环发生相对位移，使得限位块推动弹性限位件使其发生形变，形变后供吸烟管通过的通道口径变大，吸烟管可以进行伸缩。
作为优选，所述弹性限位件设置为圆环状，所述弹性限位件的纵切面为凹弧形，所述弹性限位件圆心处开设有可供吸烟管通过的通道。
作为优选，所述套环包括套环主体和套环内套，所述套环内套卡设在套环主体内侧，所述套环主体后侧面和套环内套前端面之间设置有弹性限位件。
作为优选，所述套环内套设置有向内凸起用于与限位连接部相适配的限位部。
发明的有益效果
有益效果
上述吸烟电刀的伸缩结构，使吸烟电刀在使用时可以实现单手调节吸烟刀长度，在使用时更加便捷，操作更方便。
上述吸烟刀伸缩结构，结构简单，使用方便。
上述结构使用了套环结构，在使用时增加了手持时的舒适度，增加使用者在使用时的舒适性，方便使用者进行调节。
对附图的简要说明
附图说明
图1为本发明一种吸烟电刀的可伸缩结构的侧面结构示意图；
图2为本发明一种吸烟电刀的可伸缩结构的结构示意图；
图3为本发明一种吸烟电刀的可伸缩结构的结构示意图；
图4为本发明一种吸烟电刀的可伸缩结构的弹性限位件示意图。
图中：1-电刀笔笔身，2-限位连接部，3-套环，4-弹性限位件，5-吸烟管，6-通道，21-限位块，31-凸起部，32-限位槽，33-安装槽，34-套环主体，35-套环内套，351-限位部。
发明实施例
本发明的实施方式
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
实施例一：
根据图1至图4所示，一种吸烟电刀的可伸缩结构，包括电刀笔笔身1，所述电刀笔笔身1的内部中空且一端设置有开口，电刀笔笔身1的开口端设置有限位连接部2，限位连接部2外套设有套环3，所示限位连接部2与套环3之间设置有弹性限位件4，所述吸烟电刀的可伸缩结构还包括依次贯穿套环3、弹性限位件4并与电刀笔笔身1的内部连通的通道6。
所述限位连接部2在远离电刀笔笔身1的一端设置有限位块21。
所述限位块21在远离电刀笔笔身1的一端与弹性限位件4相抵触
所述设置在电刀笔笔身1、套环3、弹性限位件4上开设的通道内设置有吸烟管5。
上述吸烟管通过使用者在使用时对于弹性限位件上通道的孔径大小的变化实现伸缩和定位。
所述套环3后端内侧设置有凸起部31，所述凸起部31内侧面与限位块21的后端面的相接触。
所述套环3内开设有用于安装限位连接部2的限位槽32，所述限位槽32的前端面和后端面之间的间距大于限位块21的前端面和后端面之间的间距。
所述套环3上开设有用于安装弹性限位件4的安装槽33，所述安装槽33距离限位槽32前端面0-1cm，优选地，为0.1cm。其中在另一个实施例中，所述安装槽33距离限位槽32前端面0.2cm，在又一个实施例中，所述安装槽33距离限位槽32前端面0.3cm。
所述弹性限位件4可为圆环状，所述弹性限位件4的纵切面可为凹弧形，可供吸烟管5通过的通道位于所述弹性限位件4圆心处。
所述套环3包括套环主体34和套环内套35，所述套环内套35卡设在套环主体34内侧，所述套环主体34后侧面和套环内套35前端面之间设置有弹性限位件4。
所述套环内套35设置有向内凸起用于与限位连接部2相适配的限位部351。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (9)

  1. 一种吸烟电刀的可伸缩结构，包括电刀笔笔身(1)，其特征在于，所述电刀笔笔身(1)的内部中空且一端设置有开口，所述电刀笔笔身(1)的开口端设置有限位连接部(2)，所述限位连接部(2)外套设有套环(3)，所示限位连接部(2)与套环(3)之间设置有弹性限位件(4)，所述吸烟电刀的可伸缩结构还包括依次贯穿套环(3)、弹性限位件(4)并与电刀笔笔身(1)的内部连通的通道(6)。
  2. 根据权利要求1所述一种吸烟电刀的可伸缩结构，其特征在于，所述限位连接部(2)在远离电刀笔笔身(1)的一端设置有限位块(21)。
  3. 根据权利要求2所述一种吸烟电刀的可伸缩结构，其特征在于，所述限位块(21)在远离电刀笔笔身(1)的一端与弹性限位件(4)相抵触。
  4. 根据权利要求2所述一种吸烟电刀的可伸缩结构，其特征在于，所述套环(3)近电刀笔笔身(1)的一端内侧设置有凸起部(31)，所述凸起部(31)内侧面与限位块(21)相接触。
  5. 根据权利要求2所述一种吸烟电刀的可伸缩结构，其特征在于，所述套环(3)内设有用于安装限位连接部(2)的限位槽(32)，所述限位槽(32)两端面之间的间距大于限位块(21)两端面之间的间距。
  6. 根据权利要求6所述一种吸烟电刀的可伸缩结构，其特征在于，所述套环(3)上设有用于安装弹性限位件(4)的安装槽(33)，所述安装槽(33)设置在距限位槽(32)前端面0-1cm处。
  7. 根据权利要求1所述一种吸烟电刀的可伸缩结构，其特征在于，所述弹性限位件(4)为圆环状，所述弹性限位件(4)的纵切面为凹弧形，所述通道贯穿所述弹性限位件(4)的圆心。
  8. 根据权利要求1所述一种吸烟电刀的可伸缩结构，其特征在于，所 述套环(3)包括套环主体(34)和套环内套(35)，所述套环内套(35)卡设在套环主体(34)内侧，所述弹性限位件(4)设于所述套环主体(34)后侧面和套环内套(35)前端面之间。
  9. 根据权利要求9所述一种吸烟电刀的可伸缩结构，其特征在于，所述套环内套(35)设置有向内凸起的限位部(351)，用于与限位连接部(2)相适配。
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