baber/WOPTO huggingface dataset:
Patent KR-20200024747-A (KR)
Title: 섬유 강화 복합 재료용 프리폼, 열경화성 수지 조성물, 섬유 강화 복합 재료 및 섬유 강화 복합 재료의 제조 방법
Inventor: HIRANO MASANORI
IPC: C08J5/04
Filed: 2018-06-05
Abstract: 본 발명은, 상온에서의 취급이 우수하고 경화시의 조성 불균일이 적은 프리폼, 및 여기에 이용되는 강화 섬유에의 함침성이 우수한 열경화성 수지 조성물, 이것을 이용하여 이루어지는 섬유 강화 복합 재료를 제공하는 것을 과제로 한다.  열경화성 수지 조성물과 드라이 강화 섬유 기재를 포함하는 섬유 강화 복합 재료용 프리폼으로서, 상기 열경화성 수지 조성물은 1.5℃/분의 속도로 승온하는 경우에 견인 주기 0.5 Hz에서의 동적점탄성 측정에서, 복소 점도η * 가 1×10 7  Pa·s로부터 1×10 1  Pa·s까지 저하될 때의 온도 변화 ΔT가 45℃ 이하인, 섬유 강화 복합 재료용 프리폼이다.
Patent KR-20200002790-A (KR)
Title: 해양 풍력 터빈용 강철 지지 구조물 모니터링
Inventor: JENSEN BIRIT BUHR
IPC: F03D17/00
Filed: 2018-03-07
Abstract: 해양 풍력 터빈(181)을 지지하는 강철 지지 구조물(180)의 열화를 추정하는 방법을 개시한다. 강철 지지 구조물(180)은 제1 유형의 강철로 제조되고, 방법은 다음의 단계를 포함한다: (a) 하나 이상의 센서 요소를 갖는 제1 센서(111)를 제공하는 단계(하나 이상의 센서 요소의 제1 센서 요소는 제1 유형의 강철에 대응하는 유형의 강철로 제조됨); (b) 제1 센서(111)를 강철 지지 구조물(180)과 연결하여 배치하는 단계; (c) 하나 이상의 센서 요소 중 적어도 하나를 통해 전류를 유도하는 단계; (d) 제1 시간 간격으로 제1 센서(111)의 전기 특성을 측정하고 그 측정치를 제1 데이터로서 저장함으로써 제1 센서(111) 부분의 열화를 모니터링하는 단계; (e) 제1 데이터로부터 강철 지지 구조물(180)의 열화를 추정하는 단계.
Patent KR-20190135993-A (KR)
Title: 트란스페린 수용체 유전자삽입 모델
Inventor: DENNIS MARK S
IPC: C07K14/79
Filed: 2018-02-15
Abstract: 본 명세서의 요약서 
일부 측면에서, 본 발명은 키메라 트란스페린 수용체 (TfR) 폴리뉴클레오티드 및 폴리펩티드를 제공한다.  또다른 측면에서, 본 발명은 키메라 TfR 유전자삽입 동물 모델을 제공하고, 이 동물 모델을 이용하여, 혈액-뇌 장벽을 통과할 수 있는 치료제를 확인한다.
Patent KR-20200010180-A (KR)
Title: 인-시튜 반도체 프로세싱 챔버 온도 장치
Inventor: NGUYEN ANDREW
IPC: H01L21/67
Filed: 2018-05-02
Abstract: 일 구현에서, 샤워헤드 조립체가 제공된다.  샤워헤드 조립체는 복수의 개구들이 통해 있는 제1 전극, 및 전극의 제1 하부 주 표면에 부착된 가스 분배 페이스플레이트를 포함한다.  가스 분배 플레이트는 프로세싱 챔버에 프로세스 가스들을 전달하기 위한 복수의 스루-홀들을 포함한다.  가스 분배 플레이트는 복수의 온도-제어 구역들로 분할된다.  샤워헤드 조립체는 온도 제어를 제공하기 위해 전극 위에 포지셔닝된 칠 플레이트, 및 샤워헤드 조립체 내의 열 전달을 관리하기 위한 복수의 열 제어 디바이스들을 더 포함한다.  열 제어 디바이스는 열전 모듈, 및 열전 모듈과 커플링된 열 파이프 조립체를 포함한다.  복수의 열 제어 디바이스들 중 각각의 열 제어 디바이스는 온도 제어 구역과 연관되고, 그리고 각각의 열 제어 디바이스의 연관된 온도 제어 구역에 대한 독립적인 온도 제어를 제공한다.
Patent KR-20190132405-A (KR)
Title: 치료제의 세포내 전달을 위한 화합물 및 조성물
Inventor: BENENATO KERRY E
IPC: C07D233/64
Filed: 2018-03-15
Abstract: 본 개시내용은 신규한 지질 및 이를 함유하는 조성물을 특징으로 한다. 상기 나노입자 조성물은 신규한 지질 뿐만 아니라 추가의 지질 예컨대 인지질, 구조 지질, 및 PEG 지질을 포함한다. 치료제 및/또는 예방제 예컨대 RNA를 추가로 포함하는 나노입자 조성물은, 예를 들어, 폴리펩타이드, 단백질, 또는 유전자 발현을 조절하기 위해 치료제 및/또는 예방제를 포유동물 세포 또는 기관에 전달하는데 유용하다.
Patent KR-20190122905-A (KR)
Inventor: UNAL ALI
IPC: B22D11/06
Filed: 2014-09-08
Abstract: 알루미늄 합금 스트립을 포함하는 알루미늄 합금 제품 및 알루미늄 합금 제품의 제조 방법이 개시되며, 일부 실시양태에서, 알루미늄 합금 스트립은 (i) 적어도 0.8 중량%의 망간; 또는 (ii) 적어도 0.6 중량%의 철; 또는  (iii) 적어도 0.8 중량%의 망간 및 적어도 0.6 중량%의 철을 포함한다.  상기 알루미늄 합금 스트립의 근-표면은, 50 마이크로미터 이상의 등가 직경(equivalent diameter)을 가진 큰 입자를 실질적으로 함유하지 않고, 작은 입자를 포함한다.  일부 실시양태에서, 각각의 작은 입자는 3 마이크로미터 미만의 특정 등가 직경을 갖고, 상기 특정 등가 직경을 가진 작은 입자의 단위면적 당 양은, 알루미늄 합금 스트립의 근-표면에서 적어도 0.01개의 입자/㎛ 2 이다.
Patent KR-20190133736-A (KR)
Title: 압연 구리박
Inventor: AOSHIMA Kazutaka
IPC: H05K1/03
Filed: 2018-03-22
Abstract: 본 발명은, 내진동성이 우수한 압연 구리박을 제공하는 것을 목적으로 한다.  본 발명의 구리박은, 압연 구리박이며, 두께가 50㎛ 이상이고, 미재결정의 결정립이 10％ 이하이다.
Patent KR-20200010272-A (KR)
Title: 애노드 조성물 및 애노드를 사전 리튬화하기 위한 방법
Inventor: JIANG RONGRONG
IPC: H01M4/131
Filed: 2017-05-24
Abstract: 리튬 이온 배터리를 위한 새로운 애노드 조성물이 제공되며, 애노드 조성물은, 실리콘계 활성 물질; 폴리이믹산 및 폴리이미드로부터 선택된 결합제; 및 리튬 염을 포함하고, 리튬 염은 200 내지 400℃의 온도에서 리튬 산화물 및/또는 리튬 과산화물로 분해될 수 있다. 또한, 애노드를 제조하기 위한 방법, 애노드를 사전 리튬화하기 위한 방법, 및 애노드를 포함하는 리튬 이온 배터리가 제공된다.
Patent KR-20200020692-A (KR)
Title: 가상화 디바이스에 대한 펌웨어 변경
Inventor: JIANG YINAN
IPC: G06F9/48
Filed: 2018-06-28
Abstract: 가상화 디바이스에서 서로 다른 가상 기능들에 대한 펌웨어를 변경하는 기술이 제공된다. 가상화 디바이스는 하드웨어 가속기와 펌웨어를 실행하는 마이크로제어기를 포함한다. 가상화 디바이스는 가상화 디바이스가 다른 가상 기능들에 대한 작업을 수행(다른 가상 머신들과 관련된 다른 가상 기능들로)한다는 점에서 가상화되며, 각 기능은 해당 기능에 대해 작업이 수행되는 동안 "시간-분할"을 얻는다. 펌웨어를 변경하기 위해, 가상화 디바이스가 현재 가상 기능에 대한 작업 수행에서 후속 가상 기능에 대한 작업 수행으로 스위칭할 때마다, 가상화 디바이스의 하나 이상의 마이크로제어기들이 후속 가상 기능에 대한 펌웨어에 대한 어드레스를 저장하는 메모리를 검사하고 후속 가상 기능에 대한 펌웨어의 실행을 시작한다. 펌웨어에 대한 어드레스는 구성 시 대응되는 가상 머신에 의해 제공된다.
Patent KR-20200009088-A (KR)
Title: 병용 요법
Inventor: GOLD DANIEL P
IPC: A61K39/00
Filed: 2018-05-22
Abstract: 본원에는 병용 요법을 사용한 질환, 예컨대 암의 치료 방법이 제공된다. 특정한 실시양태에서, 상기 방법은 유효량의 포스포이노시티드-3-키나제(PI3K) 억제제 및 유효량의 PD-1 또는 PD-L1 억제제를 환자에게 투여하는 것을 포함한다.
Patent KR-20210087297-A (KR)
Title: garlic reaping machine
Inventor: BANG SEONG HWAN
IPC: A01D17/08
Filed: 2020-01-02
Abstract: The present invention relates to a garlic harvester. More specifically, according to the present invention, since a shock absorber is installed so that a mining device and a tiller body are connected, vibration generated by the mining device vibrating in the front and rear directions is buffered to protect the device, thereby prolonging a life of the device. At the same time, since a force in the forward direction is doubled when an operation rod is advanced, it can be dug to a depth of equal to or more than twice the ground, thereby increasing efficiency of garlic harvesting. In addition, by meshing a driven gear with a driving gear of a driving device, power transmission is smoothly performed, thereby improving durability of the device. The garlic harvester of the present invention comprises: a cultivator body (100); a fastening device (200); a height adjustment device (300); the mining device (400); the driving device (500); and the shock absorber (600).
Patent KR-20210090052-A (KR)
Title: acid treatment device for wire rod equipped with sealing means
Inventor: LEE JANG WOO
IPC: C25F1/06
Filed: 2020-01-09
Abstract: According to the present invention, disclosed is a wire acid-treatment apparatus including a sealing means. More specifically, the wire acid-treatment apparatus includes: a horizontal hanger beam hooked on a crane to be moved; a hollow support frame combined with a lower part of one side of the hanger beam; a hook frame horizontally combined with the bottom of the support frame; a rotary rod provided on one side of the support frame to be rotatable to an upper side of the hook frame; and a rotation driving means installed in the support frame to rotate and drive the rotary rod. The rotation driving means includes: a driving motor installed in the support frame; a rotation output shaft having one end connected to the driving motor to be rotated and having the other end axially combined with the rotary rod through the support frame; an inner sealing cover surrounding the rotation output shaft on the inside of the support frame; a shaft flange combined with the rotation output shaft on the outside of the support frame; an outer sealing cover surrounding the shaft flange; and a rod flange combined with the rotary rod and coupled with the shaft flange, wherein a sealing means for injecting a sealing material into a sealing space or discharging the same is also provided in a sealing space formed between the inner sealing cover and the shaft flange.
Patent KR-20200012986-A (KR)
Title: A high efficiency, clean and next generation boiler by alternate staged combustion and the combustion method uisng thereof
Inventor: HWANG JAE BAEK
IPC: F23D11/16
Filed: 2020-01-10
Abstract: The present invention relates to a clean combustion boiler, and more specifically, to technology for mixing two types of fuels through two or more nozzles. As primary fuels for a first nozzle, traditional fossil fuels such as diesel or various renewable fuels such as refined oil are used. As secondary fuels for a second nozzle, alcohol fuels mixed with 50% or more of water are used. The present invention relates to boiler combustion technology which has substantially increased efficiency compared to a conventional combustion boiler while discharging various pollution and toxic substances contained in the primary fuels that provide a large amount of heat below an air pollution emission standard by an alternate staged combustion method using two fuels with completely different characteristics for the two nozzles without a special air pollution control device.
Patent KR-20210094196-A (KR)
Title: Method and apparatus for real-time in-situ measurement of the etch rate of metal film
Inventor: SHIM MOON JIN
IPC: G01N27/411
Filed: 2020-01-20
Abstract: The present invention relates to an etching analysis device, including a QCM analysis device and a control computer. A gist of the present invention is to pre-coat a metal on a QCM sensor and calculate an etching rate from a change in an oscillation frequency due to a weight reduction amount. At this time, by applying a voltage equal to or less than an oxidation-reduction potential or dissolution potential of the metal, intermittent etch rate measurement can be performed by suppressing continuous dissolution and disappearance of the metal even when the measurement is not performed.
Patent KR-20210097956-A (KR)
Title: USB nail clippers
Inventor: OH YEON WOO
IPC: G06K19/077
Filed: 2020-01-31
Abstract: The present invention is a nail clipper combined with a nail clipper and USB, but can be separated. In addition, the nail clipper is an essential item in daily life, and it is a necessary item everywhere. The nail clipper is especially useful for backpackers who travel for a long time. The present invention is the nail clipper in which a shield part for preventing cut nail from splashing out is provided in the side of the blade.
Patent KR-20200095416-A (KR)
Title: Method for clustering flight of drone with searchlight
Inventor: AHN HYE RI
IPC: F21S8/00
Filed: 2020-01-31
Abstract: According to an embodiment of the present disclosure, an operation method of a system for swarm flight of a drone comprises the steps of: grouping a plurality of drones into at least one group according to information of a target; periodically receiving a communication signal from each of the plurality of drones; comparing the strength of the received communication signal; selecting a drone, which provides the highest communication signal strength, among a plurality of drones included in the first group as a first leader drone; providing information on the target to the first leader drone; providing a control signal to the first leader drone to control a sub-drone included in the first group based on the information of the target to illuminate and photograph the target; and receiving an image of the target. The information of the target may include a position, speed, number, size, and dispersion degree of the target.
Patent KR-20210100457-A (KR)
Title: Compositions and Combination Therapies for Preventing or Treating Cancer comprising Chemokine Inhibitor, Colony Stimulating Factor Inhibitor, and Immune Checkpoint Inhibitor
Inventor: PARK TAE JUN
IPC: A61K39/395
Filed: 2020-02-06
Abstract: The present invention relates to a composition and combination therapy for treating cancer, including a chemokine inhibitor, a colony stimulating factor inhibitor and an immune checkpoint inhibitor. Particularly, the present invention relates to a pharmaceutical composition for preventing or treating cancer, including a CXCL12 inhibitor, a colony stimulating factor 1 (CSF1) inhibitor and an immune checkpoint inhibitor. The pharmaceutical composition enhances infiltration and activity of CD8 cytotoxic T cells in cancer having resistance against an immune checkpoint inhibitor, particularly a PD-1/PD-L1 immune checkpoint inhibitor, to reduce the size of the cancer effectively, and is useful for preventing and treating cancer resistant against an immune checkpoint inhibitor, particularly a cancer over-expressing p16^INK4A.
Patent KR-20210101433-A (KR)
Title: Method of mxene fiber and mxene fiber manufactured therefrom
Inventor: KIM SANGOUK
IPC: C01B21/06
Filed: 2020-02-10
Abstract: The present invention relates to a method for manufacturing mxene fiber comprising a) a step of preparing a dispersion liquid comprising mxene, and b) a step of obtaining mxene fiber by spinning the dispersion liquid in a coagulant; and mxene fiber manufactured therefrom. The mxene fiber of the present invention can uniformly and densely manufacture fiber.
Patent KR-20200021491-A (KR)
Title: Screen Golf Game Machine shared service management method and server device
Inventor: LIM SOON SEOP
IPC: G06Q30/06
Filed: 2020-02-10
Abstract: The present invention relates to a method and a server device for managing a screen golf machine (hereinafter, all screen golf machines which are a screen golf simulator for a business site or home, and includes a screen golf practice machine, a screen golf putting practice machine, or a screen swing practice machine to perform display on a screen, a kiosk, a monitor, a projector, an LED screen, or etc., are included) sharing service. The method of the present invention comprises the steps of: establishing, by a server manager, a server to allow three products of the server, a terminal, and a washing machine to communicate with each other for usage; registering or correcting, by a washing machine owner, a washing machine installation location, a washing machine type, washing machine status information, a service rate table, washing machine identification information, and owner information, in the server using the terminal; visiting, by a washing machine user, a place where a washing machine is installed to use the washing machine by searching for information registered in the server using the terminal; transmitting, by the washing machine, usage information and a washing machine status to the server and the terminal; and storing, by the server, the information received from the washing machine, and charging a service fee to a user to pay the service fee to an owner. According to the present invention, a washing machine can be managed by an unmanned system server, such that an owner can reduce labor costs, a washing machine user can use the washing machine at low costs, and all of a server manager, a washing machine owner, and a user can accurately recognize a usage status of the washing machine.
Patent KR-20210103805-A (KR)
Inventor: SEONG DOO MAN
IPC: F23K5/00
Filed: 2020-02-14
Abstract: The present invention relates to a gas supply device and a gas supply method. The gas supply device comprises: a gas generation unit generating first gas and second gas supplied to a power generation facility; a main supply unit connecting the gas generation unit and the power generation facility to allow the first gas to flow; an auxiliary supply unit connecting the gas generation unit and the main supply unit to allow the second gas to flow; and a control unit connected to each of the main supply unit and the auxiliary supply unit to control whether the second gas is supplied. The present invention can continuously supply the gas to the power generation facility.
Patent KR-20210105581-A (KR)
Inventor: AN SEOK GEUN
IPC: G06F16/732
Filed: 2020-02-19
Abstract: The present invention provides a mobile video guide system based on ICT which is appropriate for the 5G era. The present invention provides a heritage mobile video guide system comprising: a user terminal for photographing a heritage and transmitting a photographed image; and a heritage mobile guide server including an image searching and matching part for analyzing the photographed image and searching for a place matching the image, and a database for matching and storing a video for the heritage for each place. The user terminal includes a mobile application running on the user terminal, if the heritage is photographed, transmitting the photographed image to the heritage mobile guide server and playing a video transmitted from the heritage mobile guide server. The heritage mobile guide server analyzes the transmitted photographed image of the heritage, searches for the place of the heritage matching the image at the request of the mobile application, searches for a video corresponding to a retrieved place in the database, and transmits the video to the user terminal.
Patent KR-20200108242-A (KR)
Title: Method for Selective Deposition of Silicon Nitride Layer and Structure Including Selectively-Deposited Silicon Nitride Layer
Inventor: SHERO ERIC JAMES
IPC: H01L21/02
Filed: 2020-02-24
Abstract: Disclosed is a method for selectively depositing a silicon nitride on a first material relative to a second material. The exemplary method comprises the steps of: processing a first material; and selectively depositing a layer comprising a silicon nitride on a second material over the first material. The exemplary method further comprises the step of processing the deposited silicon nitride.
Patent KR-20200030042-A (KR)
Title: Display device and fabrication method of the same
Inventor: KIM DONGHOON
IPC: G02F1/017
Filed: 2020-03-10
Abstract: A light emitting sheet includes a first film, a first light emitting resin pattern layer, a second film, and a second light emitting resin pattern layer. The first light emitting resin pattern layer is formed on the first film and includes a plurality of first protrusions and a plurality of first grooves formed between the first protrusions. A second film is formed on the first light emitting resin pattern layer. The second light emitting resin pattern layer is formed between the first light emitting resin pattern layer and the second film. The second light emitting resin pattern layer includes a plurality of second protrusions and a plurality of second grooves formed between the second protrusions and the first resin layer and the second resin layer are made of the same material. The second protrusions contact the first grooves, respectively, and the first protrusions contact the second grooves, respectively.
Patent KR-20200112714-A (KR)
Inventor: KIM JUNG WON
IPC: G01N33/543
Filed: 2020-03-19
Abstract: The present invention relates to a standard material composition comprising quantum dot-containing nanoparticles for verifying a bioanalyzer. Through a standard strip and/or a standard tray, which are each made of the standard material composition, the present invention can increase the analysis accuracy of a bioanalyzer. Therefore, the present invention can contribute to providing a highly reliable bio detection (analysis) result.
Patent KR-20210117593-A (KR)
Title: UV Curable Coating Composition
Inventor: CHOI MYOUNG GI
IPC: C09D133/04
Filed: 2020-03-19
Abstract: The present invention relates to a UV curable paint composition having excellent iodine resistance. The present invention includes 15 to 45% by weight of at least hexafunctional urethane (meth) acrylate oligomers, 10 to 50% by weight of at least trifunctional (meth) acrylate monomers, 10 to 50% by weight of bifunctional (meth) acrylate monomers, 0.5 to 25% by weight of at least bifunctional alkoxylated (meth)acrylate monomers, and 0.01 to 10% by weight of a photoinitiator.
Patent KR-20210119811-A (KR)
Title: Window system for improving sound insulation performance
Inventor: KIM HYUNG JIN
IPC: E06B5/20
Filed: 2020-03-25
Abstract: The present invention relates to a window system for improving sound insulation performance, which comprises: a window frame; a window sash including a first sash installed on the window frame and a second sash installed on the window frame and installed on an inner side of the first sash; a sound insulating device comprising a fixing part installed on the other side of the second sash, a connecting part coupled to the fixing part and extending in the direction of the first sash, and a fastening part installed on one side of the first sash; and a handle connected to the sound insulating device and capable of applying a force to the sound insulating device. The connecting part is in contact with the fastening part by the handle, and when the connecting part and the fastening part are in contact by the handle, one side of the first sash and the other side of the second sash are pressed in a contacting direction.
Patent KR-20210119851-A (KR)
Title: Mold apparatus for vertically producing prestressed concrete members
Inventor: CHO YEONG CHEOL
IPC: B28B7/02
Filed: 2020-03-25
Abstract: The present invention relates to a mold apparatus for vertically producing prestressed concrete members in which multiple molds are vertically arranged to easily mass-produce tensile concrete members in a relatively small space. The mold apparatus includes: a central vertical plate fixed to the ground (10); a pair of rails (20) passing through the central vertical plate (10) and installed on the ground; a first vertical plate (30) movably provided on an upper surface of one side of the rail (20); a second vertical plate (40) movably provided on an upper surface of the other side of the rail (20); two pairs of pressure rods (50) fixed to both sides of the first vertical plate (30) and the second vertical plate (40) inside both sides of the central vertical plate (10); and a mold part (60) installed between the central vertical plate (10) and the first vertical plate (30) and the central vertical plate (10) and the second vertical plate (40).
Patent KR-20210120193-A (KR)
Title: Compound for organic electronic element, organic electronic element using the same, and an electronic device thereof
Inventor: JO MIN JI
IPC: C07D407/12
Filed: 2020-03-26
Abstract: The present invention relates to a compound for an organic electric element, an organic electric element using the same, and an electronic device including the organic electric element. According to the present invention, the organic electric element having high luminous efficiency, low driving voltage, and high heat resistance can be provided, and color purity and lifespan of the organic electric element can be improved.
Patent KR-20210121600-A (KR)
Inventor: SUH KYUNG JOO
IPC: H04W36/14
Filed: 2020-03-30
Abstract: The present invention relates to a method and apparatus for managing a session. A communication method of a terminal may comprise the steps of: performing communication through a multiple access PDU session established in a 5G network; transmitting an ATTACH REQUEST including a PDN connection request to a mobility management entity (MME) through a base station based on the movement from the 5G network to the 4G network; receiving an ATTACH ACCEPT including an activate default EPS bearer context request including parameter information for movement of the established multiple access PDU session from the MME through the base station; and performing a configuration for movement of the established multiple access PDU session based on parameter information included in the activate default EPS bearer context request. The present invention can efficiently manage a session under an environment where wireless communication and wired communication coexist and a 4G system, a 5G system, a terminal, etc. coexist.
Patent KR-20210125618-A (KR)
Title: Armrest Angle Adjustment for Automobile Seat
Inventor: MOON KWANGSU
IPC: B60N2/75
Filed: 2020-03-31
Abstract: The present invention provides a device for adjusting the angle of a seat armrest, comprising: an armrest installed at a seat back side portion of a seat cushion frame; an inner bracket fixedly installed at the seat back side portion such that the armrest is mounted thereon; an outer coupling unit coupled to an edge portion of the armrest in order to adjust the rotation of the armrest; an angle adjustment assembly installed at the outer coupling unit in order to adjust the angle of the armrest; and an inner cover installed to fix the angle adjustment assembly while surrounding the angle adjustment assembly, wherein the angle adjustment assembly includes: a movement guide unit guiding the free movement of the armrest; an angle guide unit installed so as to adjust the angle of the armrest; a ratchet limiting the movement of the angle guide unit; a ratchet housing accommodating the ratchet; and a spring installed in the ratchet housing so as to provide an elastic force to the ratchet. The present invention may reduce the weight of the angle adjustment device.