baber/WOPTO huggingface dataset:
Patent KR-20220155783-A (KR)
Title: Soil-cement injected precast pile composition using high-calcium fly ash of in a fluidized bed coal combustor
Inventor: PARK HEON CHUL
IPC: C04B28/04
Filed: 2021-05-17
Abstract: The present invention relates to a post injection material composition comprising 10 to 100 parts by weight of in-furnace desulfurization type coal combustion high calcium fly ash with respect to 100 parts by weight of cement. According to the present invention, a calcium oxide (CaO) component contained in a high-calcium fly ash of an in-furnace desulfurization type fluidized bed boiler coal combustion power plant meets mixing water, generates heat and expands, so as to quickly stabilize the ground, and a vitrified silicon oxide (SiO_2) compound is activated by alkali stimulation generated during a hydration reaction of cement to cause a pozzolanic reaction, thereby expressing long-term strength equal to or higher than that of cement. In addition, because fly ash having a relatively low mass is included, an amount of powder in unit mass is increased to compensate for volumetric shrinkage, and thus, a gap between a perforated ground and the original ground may be filled, and the loss of injection liquid by groundwater that may exist between a perforation hole and an embedded post may be prevented, so as to significantly improve a front end bearing capacity and circumferential friction of the embedded post compared to the existing cement injection solution.
Patent KR-20220155834-A (KR)
Title: Method of AI-Based Diagnostic Technology Automation For Application To Equipment
Inventor: JUNG IN SOO
IPC: G06N3/08
Filed: 2021-05-17
Abstract: The present invention comprises: a step of receiving one or more from vibration data, noise data and CAN data from a rotating body within a vehicle; a data input processing step which trims input data; a step of extracting features from the trimmed data; a step of setting a set value of a hyperparameter on one or more from vibration data, noise data and CAN data; and a step of generating a total of N-number models in order to contain machine learning (ML) and deep learning (DL) as individual models and generating an ensemble model structure for the N-number individual models. As the parameter update by the hyperparameter is conducted to have a cost function value of the N-number individual models minimized, compensation is optimized and the N-number individual model structure constituting the ensemble model structure is changed. The purpose of the present invention is to provide a universal AI-based diagnosing technology automation method which can be used by anyone.
Patent KR-20220156698-A (KR)
Title: A four-wheel steering system including rear wheel fixing device and control method thereof
Inventor: CHA HYUN ROK
IPC: B62D5/04
Filed: 2021-05-18
Abstract: The present invention relates to a four-wheel steering system having a rear wheel fixing device, where a front wheel control unit detects malfunction of the rear wheel control unit to fixate a rear wheel shaft unit or fixate a rear wheel shaft unit through a braking force generation unit manually controlled by a user, and a control method thereof. The four-wheel steering system comprises: a four-wheel steering device having a front wheel shaft unit, the front wheel control unit controlling steering of the front wheel shaft unit, a front wheel motor unit having a front wheel motor rotating the front wheel shaft unit and a fixing motor electrically connected to the front wheel control unit, the rear wheel shaft unit in parallel to the front wheel shaft unit, a rear wheel motor unit rotating the rear wheel shaft unit, and a rear wheel control unit communicating with the front wheel control unit and electrically connected to the rear wheel motor unit; and the rear wheel fixing device having a disk brake inserted into the rear wheel shaft unit to be rotated with the rear wheel shaft unit together, a rear wheel steering unit having a pinion gear formed in the other end of the rear wheel shaft unit and a rack gear fastened to the pinion gear, the braking force generation unit providing braking force to the disk brake while surrounding at least a portion of the disk brake, a wire connected to the braking force generation unit or the fixing motor, and a braking unit operating the braking force generation unit by the front wheel control unit or control of the user boarding on a vehicle.
Patent KR-20220156326-A (KR)
Title: An electronic device that recognizes a touch and performs a display
Inventor: KWON KUN HYUNG
IPC: G06F3/041
Filed: 2021-05-18
Abstract: According to an exemplary embodiment of the present disclosure, an electronic device, which can reduce production costs and efficiently secure a design area, includes: a touch panel configured to sense touch input; a display panel configured to output an image; a touch and display driver integration (TDDI) configured to control the touch panel and the display panel; and an interface circuit for data interfacing with a host. The TDDI is configured to receive touch firmware data through the interface circuit and manage the touch firmware data by using at least one of the interface circuits and a first volatile memory included in the TDDI.
Patent KR-20210148917-A (KR)
Inventor: YABUUCHI MAKOTO
IPC: G11C8/08
Filed: 2021-05-27
Abstract: The present invention provides a semiconductor device having an improved search access speed. The semiconductor device is equipped with: a plurality of memory cells connected to a match line; a word line driver coupled to a word line; a valid cell that stores a valid bit indicating a validity or an invalidity of an entry; a first pre-charge circuit connected to one end of the match line, and pre-charging the match line to a high level; and a second pre-charge circuit connected to the other end of the match line, and pre-charging the match line to the high level. The plurality of memory cells are disposed between the first pre-charge circuit and the second pre-charge circuit, and the second pre-charge circuit is disposed between the word line driver and the plurality of memory cells.
Patent KR-20220161023-A (KR)
Inventor: LEE HAENGKI
IPC: G21F9/18
Filed: 2021-05-28
Abstract: The present invention relates to an apparatus and a method for removing radionuclides, which allows CO_3^2- formed by urea decomposition of microorganisms to be combined with radionuclides such as Sr^2+ in a culture medium to precipitate and be removed as stable minerals such as SrCO_3, thereby increasing the precipitation efficiency of minerals such as SrCO_3 and efficiently removing the precipitated minerals. According to the present invention, the apparatus for removing radionuclides comprises: a medium mixture solution supply unit storing and supplying a medium mixture solution in which a medium, a magnesium (Mg)-containing substance, and a calcium (Ca)-containing substance are mixed; a radionuclide supply unit supplying a radionuclide solution containing strontium ions (Sr^2+ ); a mineral generation unit mixing the medium mixture solution supplied from the medium mixture solution supply unit and the radionuclide solution supplied from the radionuclide supply unit and adding a urea-decomposition microorganism to the mixture to prepare a microbial culture medium and allowing CO_3^2- formed by urea decomposition of the urea- decomposition microorganism to be combined with strontium ions (Sr^2+ ) in the microbial culture medium to precipitate SrCO_3 or SrCaCO_3 minerals; and a culture solution discharge unit discharging the microbial culture solution from the mineral generation unit to the outside and filtering out the precipitated minerals.
Patent KR-20220166469-A (KR)
Title: A plate for waist protection fixation pin
Inventor: KIM BO KYUM
IPC: F16B2/24
Filed: 2021-06-10
Abstract: The present invention relates to a fixing pin for a waist protector, in which the fixing pin is connected to a belt on the waist and the waist protector is inserted into a gap between the fixing pin and the belt, so that the fixing pin connected to the belt prevents the waist protector from moving upward. The present invention provides an effect of preventing the waist protector from moving upward along the waistline when users bend their waist.
Patent KR-20220169159-A (KR)
Title: Forceps for Tissue Excision
Inventor: LEE KIHO
IPC: A61B17/295
Filed: 2021-06-18
Abstract: Disclosed are forceps for tissue excision. The disclosed forceps for tissue excision include: a main body (10) which is formed in a cylindrical shape with a hollow part formed therein; an elastic tube (20) which is coupled to the upper end of the main body (10), and is formed in a pipe shape made of an elastic material, to transmit force for moving a tissue collection unit (40); an operation unit (30) which is coupled to the main body (10), to control a collecting operation of the tissue collection unit (40); and the tissue collection unit (40) which is coupled to the end of the elastic tube (20), to collect tissue (A).
Patent KR-20220170316-A (KR)
Title: Health supplement that induces brain cell protective effect to prevent and treat degenerative diseases and enhance memory
Inventor: KIM SU YEON
IPC: A23L33/10
Filed: 2021-06-22
Abstract: The present invention relates to health supplement for preventing and treating degenerative diseases and inducing a brain cell protection effect that enhances memory and, more specifically, to a composition for protecting brain cells and enhancing memory containing an extract of Rubia cordifoli, wherein the composition of the present invention induces the brain cell protection effect of modern people suffering from brain damage caused by various environmental factors such as stress, drinking, smoking and the like, and thus can be used for medicines and health supplements that induce effects of preventing and treating the degenerative diseases and enhancing the memory.
Patent KR-20230001583-A (KR)
Title: Deep question type non-face interview system using similarity extraction model based on national competency standards
Inventor: KIM YONGHA
IPC: G06F16/33
Filed: 2021-06-28
Abstract: The present invention relates to an in-depth question type non-face-to-face interview system, and more specifically, to an in-depth question type non-face-to-face interview system using a National competency standard (NCS)-based similarity extraction model, which classifies contents of a cover letter of an applicant on the basis of the NCS and extracts knowledge of the applicant through the classified contents so as to make an in-depth question type non-face-to-face interview possible through customized questions. To achieve the above objective, the present invention comprises: an applicant terminal for either uploading a cover letter of an applicant or conducting a non-face-to-face interview; a non-face-to-face interview server for performing syntax analysis on contents of the uploaded cover letter, classifying the contents of the cover letter analyzed on the basis of NCS-based job types, and conducting a non-face-to-face interview on the basis of the classified contents; and an interviewer terminal for conducting a non-face-to-face interview with the applicant terminal through the non-face-to-face interview server.
Patent KR-20230006088-A (KR)
Title: The vibrating compactor and compacting method therof for earthquake capacity advancement
Inventor: LEE JAE HEUNG
IPC: E02D3/026
Filed: 2021-07-02
Abstract: The present invention relates to a compactor which includes a compacting plate formed in the shape of a roly-poly as a whole by partially overlapping two circles having respective radii a and b (a>b) and connecting the outer edges of the circles with lines or includes a compacting plate formed in the shape of a triangle as a whole by placing two circles with radius a side by side, placing a circle with radius b (a>b) above the center thereof, and connecting the outer edges of the circles with lines; and to a compacting method using the compactor.
Patent KR-20220158202-A (KR)
Title: Electronic device
Inventor: KIM HUN TAE
IPC: G06F3/041
Filed: 2021-07-06
Abstract: An electronic device comprises: a display panel which is divided into a first area having pixels disposed thereon and a second area adjacent to the first area and bent with respect to a virtual axis, and includes a data line connected to the pixel and a first wiring insulated from the pixel; an optical film; a display module including a bending cover layer; and a window module including a glass substrate, and a window protective layer having a cover part disposed on the glass substrate and a protrusion part protruding from the cover part. The end of the optical film and the end of the bending cover layer, which face each other, define a separation area within the first area and, from a planar view, the data line and the first wiring overlap with the separation area, and the protrusion part overlaps with the first wiring within the separation space. According to the present invention, electrical characteristics and folding characteristics are improved.
Patent KR-20230010396-A (KR)
Title: Stretch banding machine
Inventor: HAM KANG HO
IPC: B21D5/04
Filed: 2021-07-12
Abstract: The present invention relates to a stretch bending machine for bending a plate material or beam-shaped material (1) formed of metal or aluminum at a certain angle, wherein the stretch bending machine includes a seating unit (10), a side moving unit (20), a clamp unit (30), a rotating unit (40), a bending unit (50), a vertical moving unit (60), and a control unit. Accordingly, the present invention can form a curvature on a material at various angles, thereby improving accuracy and workability, can maximally prevent deformation of the material when forming the curvature on the material, and can minimize defects and contribute to productivity improvement.
Patent KR-20230015627-A (KR)
Inventor: BAE JAE MAN
IPC: H05K1/03
Filed: 2021-07-23
Abstract: A circuit board according to an embodiment comprises: an insulating layer which includes an upper surface and a lower surface; and a through electrode which penetrates the upper and lower surfaces of the insulating layer. The through electrode includes: a first electrode part which is arranged adjacent to the lower surface of the insulating layer and has a first slope such that the width gradually decreases toward the upper surface of the insulating layer; a second electrode part which is arranged above the first electrode part and has a second slope such that the width gradually increases toward the upper surface of the insulating layer; and a third electrode part which is arranged between the first electrode part and the second electrode part and has a third slope different from the first and second slopes, wherein the width of the third electrode part is the same as the width of the area which has the smallest width among the first and second electrode parts. The circuit board can improve the physical reliability and electrical reliability of the through electrode.
Patent KR-20230022313-A (KR)
Inventor: JUNG YU JIN
IPC: B60W40/08
Filed: 2021-08-05
Abstract: Introduced are a drunk driving prevention system and a drunk driving prevention method using the same. The drunk driving prevention system having a mask wearing mode of the present invention comprises: a camera which captures an image including a face of a driver seated in a driver's seat; a sensor module detecting alcohol contained in a driver's breath; and a control module determining whether the driver is wearing a mask based on the image captured by the camera, diagnosing a driver's drinking status based on an alcohol concentration detected by the sensor module, and operating a start limiting apparatus of a vehicle. Provided are the drunk driving prevention system including a separate breathalyzer control logic and the drunk driving prevention method using the same.
Patent KR-20230021367-A (KR)
Title: Nano Tube Synthesizing Apparatus
Inventor: MOON SE YOUN
IPC: C01B32/16
Filed: 2021-08-05
Abstract: The present invention relates to a nanotube synthesizing device based on a high-frequency high-temperature plasma for synthesizing and collecting a nanotube of a carbon nanotube, a boron nitride nanotube, and the like in large quantities, and comprises a synthesizing part, a high-frequency application part, and a collection part. Therefore, the present invention is capable of minimizing damage to the nanotube.
Patent KR-20230021811-A (KR)
Inventor: LEE YOUN SU
IPC: C12N1/20
Filed: 2021-08-06
Abstract: The present invention relates to a novel Pantoea cypripedii KW20S-2-3B strain (KCTC82920) having antagonistic activity against Acidovorax citrulli, and a use thereof. The strain contains a 16s rRNA gene of SEQ ID NO: 1.
Patent KR-20230021918-A (KR)
Title: Ultrasonic temperature sensing apparatus of using magnetostrictive principle and sensing method thereof
Inventor: PARK YOUNG WOO
IPC: G10K11/24
Filed: 2021-08-06
Abstract: Provided is an ultrasonic temperature measuring apparatus using a magnetostrictive principle. The ultrasonic temperature measuring apparatus comprises: a magnetostrictive wire used as an ultrasonic waveguide; a reflection point unit fixed and disposed at one position in the longitudinal direction of the wire; a pulse transmitting unit disposed at one end of the wire to apply a pulse current to the wire, providing the periphery of the wire with a second magnetic field in a circumferential direction with respect to the wire; a wire fixing unit disposed on the other side of the wire to fix the wire; and a receiving unit for measuring the temperature of the reflection point unit through a first sensing coil unit that detects a change due to a third magnetic field if the second magnetic field moves along the wire so that the third magnetic field is formed in the point at which the second magnetic field meets the reflection point unit. Therefore, the ultrasonic temperature measuring apparatus can measure the temperature of an object to be measured by using the wire, which is a solid, as an ultrasonic waveguide.
Patent KR-20230023518-A (KR)
Title: Automatic pet waste collection device
Inventor: KIM JONG SU
IPC: A01K23/00
Filed: 2021-08-10
Abstract: Disclosed in the present invention is a device for automatically collecting pet excreta, which is to automatically collect pet excreta using a defecation sheet. The present invention provides a device for automatically collecting pet excreta, wherein a contaminated defecation sheet and pet excreta thereon are inserted into a plastic film tube, and then the sheet and the excreta are wound around an outer peripheral surface of a winding roller together with the plastic film tube to prevent excreta and odor leakage. An inlet where the contaminated defecation sheet and the pet excreta thereon flow in is provided with an entrance of the plastic film tube that is continuously supplied to prevent device contamination attributable to the excreta. A plastic sheet installed along a vertical wall with a predetermined height is further provided on an upper portion of the inlet where the defecation sheet flows in to prevent device contamination attributable to a male pet dog's urine. Provided is a cartridge including a defecation sheet block, a plastic film tube block, and a plastic sheet block where a defecation sheet, a plastic film tube, and a plastic sheet with predetermined lengths are folded and stacked in a zigzag pattern so that the defecation sheet, the plastic film tube, and the plastic sheet can be continuously supplied. As a result, excreta can be automatically collected for a predetermined period. The winding roller for winding the defecation sheet, the plastic film tube, and the plastic sheet is installed in a plastic bag with a predetermined size to be rotatable, and thus it is possible to prevent leakage of odor generated at the defecation sheet, the plastic film tube, and the plastic sheet wound around the winding roller to the outside.
Patent KR-20230026044-A (KR)
Inventor: LEE HYUNYOUNG
IPC: A61C1/12
Filed: 2021-08-17
Abstract: 치주염과 같은 구강질환의 치료에 요구되는 고밀도 플라즈마를 발생함과 동시에 오존 발생을 최소화할 수 있는 구강질환 치료기 및 구강질환 치료 방법이 개시된다. 본 발명의 실시예에 따른 구강질환 치료기는 구강질환의 치료를 위한 플라즈마를 발생하는 구강질환 치료기에 있어서, 내부에 공간부가 구비된 핸드피스 본체; 상기 핸드피스 본체의 공간부에 장착되고, 내부의 플라즈마 발생 공간에서 가스를 여기시켜 플라즈마를 발생하는 플라즈마 발생부; 및 상기 핸드피스 본체 또는 상기 플라즈마 발생부의 단부 노즐에 착탈 가능하게 결합되는 팁부;를 포함한다. 상기 팁부는 상기 플라즈마 발생 공간으로 산소가 유입되는 것을 억제하면서 상기 플라즈마를 국소부위에 조사하기 위한 통로를 구비한다.
Patent KR-20230030091-A (KR)
Inventor: KIM JIN HO
IPC: G08B21/02
Filed: 2021-08-24
Abstract: 본 발명은 운행자동차 배출가스 저감장치 관리시스템에 관한 것으로서, 더욱 상세하게는 디젤산화촉매(DOC)/디젤 입자상물질 필터(DPF) 전, 후단에 입자상물질 센서(PM 센서)를 장착하여 PM을 측정하거나, 디젤산화촉매(DOC)/디젤 입자상물질 필터(DPF) 전, 후단에 압력센서 또는 차압센서를 장착하여 압력을 측정하고, SCR 촉매 전, 후단에 NO X  센서를 장착하여 질소산화물(NO X )의 농도를 측정함으로써, PM 및 질소산화물(NO X )의 저감율과 매연저감장치와 SCR 시스템의 작동상태, 임의 탈거 및 고장 여부 정보를 수집할 수 있고, 요소수(Urea) 탱크에 요소수 양 및 농도 센서를 장착하여 요소수의 양과 농도(품질)를 측정함으로써, 요소수의 미보충 상태와 불량 요소수의 사용 상태를 확인할 수 있으며, 입자상물질 센서, 압력센서 또는 차압센서를 통해 매연저감장치의 임의 탈거와 고장 여부를 확인할 수 있고, 선택적 환원촉매(SCR) 시스템의 DCU(Dosing Control Unit)를 통해 저감장치의 임의 탈거와 고장 여부를 확인할 수 있고, PM, 압력, 질소산화물(NO X ), 요소수의 양과 농도, 매연저감장치와 SCR 시스템의 임의 탈거와 고장 정보를 통합 제어기에서 수합하고 통신모듈을 통해 관제센터에 전송하여 줌으로써, 관제센터에서 실시간 모니터링하여 차량 소유자 또는 저감장치 제작사로 조치를 위한 통보를 할 수 있으며, 요소수의 부족과 불량 요소수 사용과 매연저감장치와 SCR 시스템의 고장 및 임의 탈거 감지 시 액셀 페달의 출력을 제한하여 줌으로써, 요소수의 정상 사용과 저감장치 정비를 유도할 수 있는 효과가 있다.
Patent KR-20230029426-A (KR)
Title: 히드록시프로필셀룰로오스의 제조방법 및 이를 이용하여 제조된 필름용 조성물
Inventor: KIM HYO GAP
IPC: C08B15/02
Filed: 2021-08-24
Abstract: 히드록시프로필셀룰로오스의 제조방법 및 이를 이용하여 제조된 필름용 조성물을 제공한다. 히드록시프로필셀룰로오스의 제조방법은 알칼리셀룰로오스와 프로필렌옥사이드를 헥세인 용매에 넣고 반응시켜 히드록시프로필셀룰로오스를을 합성하는 합성 단계, 상기 합성한 히드록시프로필셀룰로오스를 산성용액에 용해시키고 사이클로헥세인 또는 헥세인에 적가하는 정제 단계 및 상기 정제 후 여과를 이용하여 침전물을 회수하고, 상기 침전물을 건조시키는 건조 단계를 포함한다. 따라서, 상기 제조방법에 의해 필름형성능이 향상된 히드록시프로필셀룰로오스를 제조할 수 있다.
Patent KR-20220068130-A (KR)
Title: Methods for preparing nicotine and intermediates thereof
Inventor: LI JIAQUAN
IPC: C12P17/10
Filed: 2021-08-26
Abstract: Described is modified nucleic acids encoding imine reductase enzymes. In addition, described is modified imine reductase enzymes. In some embodiments, imine reductase can be used to produce products such as (S)-nicotine and intermediates thereof. According to the present invention, unnecessary decomposition steps can be avoided by allowing direct preparation of (S)-nicotine.
Patent KR-20230032280-A (KR)
Title: 전립선결찰술 시술 시스템
Inventor: LEEM JI SEOK
IPC: A61B17/00
Filed: 2021-08-30
Abstract: 본 발명은 시술용 침상; 상기 시술용 침상에 일단부가 고정된 아암과 상기 아암의 타단부에 결합된 일부가 오픈되거나 오픈되지 않은 고리형 음경수용부재를 포함하는 지렛대 장치; 및 요도로 쉬스(sheath)을 삽입하여 결찰실로 전립선을 결찰하는 기능을 갖는 전립선결찰술(UROLIFT) 시술장치;를 포함하며, 
상기 지렛대 장치의 고리형 음경수용부재 내벽은, 음경이 수용되고, 상기 전립성 비대증 시술장치의 쉬스가 요도에 삽입된 상태에서, 전립선을 압박하기 위하여 상기 쉬스를 소정의 각도로 젖힐 때, 지렛대 역할을 수행하는 것을 특징으로 하는 전립선결찰술 시술 시스템을 제공한다.
Patent KR-20230034476-A (KR)
Title: 스마트 단말기를 이용한 건강진단 진행 방법 및 시스템
Inventor: KIM CHANG YONG
IPC: G07C9/22
Filed: 2021-09-02
Abstract: 본 개시의 실시예는 건강진단 진행 서버가 접속된 수진자의 전자 장치로 건강진단 예약을 위한 화면을 제공하고, 상기 화면에 입력된 예약정보를 상기 전자 장치로부터 수신하는 단계; 상기 건강진단 진행 서버가 상기 전자 장치로부터의 건진센터 도착 신호의 수신과 대응하여, 상기 예약정보에 따른 무인 접수를 위한 화면을 제공하여 상기 화면을 통해 입력된 인적정보를 기초로 상기 수진자의 건진정보를 생성하는 단계; 상기 전자 장치로부터의 로그인입력이 획득되면, 상기 건강진단 진행 서버가 상기 전자 장치로 건진서비스 시작 신호를 전송하며, 상기 시작 신호에 대응하여 상기 전자 장치가 수진자 검사 진행을 수행하도록 처리하는 단계; 상기 수진자의 건진정보를 고려하여 상기 수진자의 모든 검사들이 종료된 것으로 판단된 경우, 상기 건강진단 진행 서버가 상기 전자 장치로 검사완료 메시지를 전송하는 단계를 포함하는 스마트 단말기를 이용한 건강진단 진행 방법을 제공한다.
Patent KR-20230034049-A (KR)
Inventor: LEE SHIN HEUNG
IPC: E06B9/38
Filed: 2021-09-02
Abstract: 본 발명은 버튼식 블라인드 줄 안전커버에 관한 것으로서, 평상시에는 블라인드 줄의 외부 노출을 방지하여 어린 아이로 하여금 안전사고 발생을 미연에 방지하는 가운데 사용시만 선택적으로 블라인드 줄이 노출될 수 있도록 하기 위한 것이다. 
이를 실현하기 위한 본 발명은, 블라인드 줄(100)이 내부에 안내되는 가이드봉(10)과; 상기 가이드봉(10)의 상부에 결합되는 상부 고정봉(20)과; 상기 상부 고정봉(20)을 블라인드 프레임(100)의 일측에 구성된 브라켓(110)에 거치시키기 위한 거치고리(30)와; 상기 가이드봉(10)의 하부에 상하 슬라이딩 승강 가능하게 연결되는 승강 가동봉(40)과; 상기 승강 가동봉(40)의 하부에 구비되되, 블라인드 줄(W)의 하단부가 가이드될 수 있도록 가이드홈(62)이 형성된 고정블럭(60)이 상단측에 착탈 가능하게 구비된 손잡이봉(50)과; 상기 손잡이봉(50)에 구비되어 승강 가동봉(40)을 고정 또는 해제하는 기능을 수행하는 작동버튼(70);을 포함하는 구성을 이루는 것을 특징으로 한다.