baber/WOPTO huggingface dataset:
Patent WO-2019216481-A1 (WO)
Title: Method for manufacturing paper carrier tape
Inventor: WOO HYUN GYU
IPC: B31F1/00
Filed: 2018-06-07
Abstract: The present invention relates to a method for manufacturing a paper carrier tape and, more specifically, to a method for manufacturing a paper carrier tape, wherein as the front-end surface of a punch is moved downward, a hole is formed through a part of a paper carrier tape by the punch, and the surrounding of the formed hole of the paper carrier tape is pressed by a press part to finish the lower side of the hole to be thinner, so that an electronic component reception part capable of receiving an electronic component is formed.
Patent WO-2019240318-A1 (WO)
Inventor: CHO AYOUNG
IPC: H04N13/239
Filed: 2018-06-26
Abstract: 본 발명은 조명장치를 포함하는 이동 단말기 및 그 제어방법에 관한 것이다. 본 발명의 일 실시 예에 따른 이동 단말기는, 기 설정된 패턴의 광을 조사하는 패턴광원을 포함하는 조명 장치, 카메라 및 상기 조명 장치 및 상기 카메라를 이용하여 3차원 영상을 촬영하는 제어부를 포함하고, 상기 패턴광원은, 복수의 발광소자를 포함하고, 상기 복수의 발광소자는 복수의 그룹으로 그룹화되며, 상기 제어부는, 상기 복수의 그룹을 순차적으로 점등시키며, 상기 복수의 그룹 중 적어도 일부의 발광시간이 다르도록 상기 패턴광원을 제어하는 것을 특징으로 한다.
Patent WO-2019132160-A1 (WO)
Title: 내시경용 시술기구
Inventor: KIM CHANGBO
IPC: A61B1/00
Filed: 2018-08-30
Abstract: 본 발명은 내시경용 시술기구에 관한 것이다. 본 발명의 시술기구는 내시경의 채널을 통해 삽입되는 이중 튜브를 구비하며, 상기 이중 튜브는 외측 튜브와, 상기 외측 튜브를 통해 삽입되고 상기 외측 튜브에 대해 상대적으로 전진 및 후퇴하는 내측 튜브를 구비하고, 상기 이중 튜브의 외측 튜브는 유기 고분자에 실리콘 화합물을 추가한 플라스틱 재료로 형성되어, 상기 채널의 경로를 따라 상기 이중 튜브를 구부린 상태에서 상기 외측 튜브에 대해 상기 내측 튜브를 전진 및 후퇴시킬 때에 상기 내측 튜브의 미끄럼 이동면인 외주면과 상기 외측 튜브의 미끄럼 이동면인 내주면 사이의 마찰 저항을 상기 이중 튜브의 외측 튜브와 내측 튜브의 모두를 유기 고분자만으로 형성한 경우보다 작게 한다.
Patent WO-2019146869-A1 (WO)
Inventor: KAWAMURA HISAYUKI
IPC: H01L51/00
Filed: 2018-09-14
Abstract: L'invention concerne un nouveau composé utile en tant que matériau de transport de trous pour un dispositif électronique organique, en particulier, un dispositif électroluminescent organique (EL). Le composé de la présente invention est représenté par la formule générale suivante (1).
Patent WO-2019074312-A1 (WO)
Title: Method for fabricating printed circuit board and printed circuit board fabricated thereby
Inventor: DAN SUNG-BAEK
IPC: H05K3/42
Filed: 2018-10-12
Abstract: Disclosed are a method for fabricating a printed circuit board wherein through-holes are formed in an organic substrate, followed by forming micro-circuit patterns through sputtering and plating, whereby the printed circuit board has low permittivity properties and enables high-speed processing, and a printed circuit board fabricated thereby. The disclosed method for fabricating a printed circuit board comprises the steps of: preparing a base substrate; forming a through-hole perforating the base substrate; forming a thin seed layer on the base substrate and in the through-hole; forming a thin plate layer on the thin seed layer; and etching the thin seed layer and the thin plate layer to form a micro-circuit pattern, wherein the base substrate is one selected from an organic substrate, FR-4, and a prepreg.
Patent WO-2019107771-A1 (WO)
Inventor: KIM HYO SUK
IPC: C08K5/101
Filed: 2018-11-01
Abstract: 본 발명은 프탈레이트 화합물의 수소화 방법에 관한 것이다. 본 발명에 따르면, 수소화 반응의 입체선택성이 증가하여 생성물 중 시스 이성질체의 함량이 높게 나타나며, 이에 따라 생성물의 가소제로서의 품질을 향상시킬 수 있다.
Patent WO-2019112195-A1 (WO)
Title: 치과용 임플란트의 픽스츄어
Inventor: PARK KWANG BUM
IPC: A61C8/00
Filed: 2018-11-12
Abstract: 치과용 임플란트의 픽스츄어가 개시된다. 본 발명에 따른 치과용 임플란트의 픽스츄어는, 외벽 둘레를 따라 나선형으로 나사부가 마련되며 지대주가 삽입되는 지대주용 삽입홈이 상단부에서 길이방향으로 함몰되어 형성되는 픽스츄어 본체와, 픽스츄어 본체의 내벽의 적어도 일부분에 지대주의 외벽에 형상맞춤되는 형상으로 마련되되 다각형의 형상으로 마련되어 지대주의 픽스츄어 본체에 대한 상대회전을 저지하는 지대주 회전 저지부와, 지대주 회전 저지부의 상부 영역에서 지대주 회전 저지부에 인접하게 픽스츄어 본체에 마련되며 픽스츄어 본체를 회전시키는 회전용 공구가 착탈 가능하게 결합되는 공구 결합부를 포함한다.
Patent WO-2019112200-A1 (WO)
Title: 열전 모듈
Inventor: LEE JONG MIN
IPC: H01L35/02
Filed: 2018-11-19
Abstract: 실시예는 제 1 열전도 플레이트, 상기 제 1 열전도 플레이트 상에 배치되는 열전 소자, 상기 열전 소자 상에 배치되는 제 2 열전도 플레이트 및 상기 제 1 열전도 플레이트 상에 배치되며, 수용 공간을 형성하여 상기 수용 공간에 상기 열전 소자를 수용하는 커버 프레임을 포함하고, 상기 열전 소자는 제 1 기판, 상기 제 1 기판 상에 배치된 복수의 열전 레그, 상기 복수의 열전 레그 상에 배치되는 제 2 기판 및 상기 제 1 기판과 상기 복수의 열전 레그 사이에 배치되는 복수의 제 1 전극과 상기 제 2 기판과 상기 복수의 열전 레그 사이에 배치되는 복수의 제 2 전극을 포함하는 전극을 포함하고, 상기 커버 프레임은 상기 제 1 열전도 플레이트 상에서 상기 열전 소자와 이격 되도록 배치된 외곽 프레임 및 상기 외곽 프레임의 상단에서 하부 방향으로 경사지도록 상기 제 2 열전도 플레이트 측으로 연장된 상부 프레임을 포함하는 열전 모듈을 개시한다.
Patent WO-2019132307-A1 (WO)
Title: 태양광 발전모듈
Inventor: TARK SUNG-JU
IPC: H01L31/054
Filed: 2018-12-07
Abstract: 패턴 글라스와 태양전지모듈을 일체화한 단층 구조의 태양광 발전모듈이 개시된다. 개시되는 태양광 발전모듈은 베이스부재와, 상기 베이스부재에 구비되며 광학패턴이 형성된 패턴부재를 포함하는 패턴 글라스; 태양전지를 구비하는 태양전지모듈; 상기 패턴부재에 접착되는 기둥형상의 복수의 지지접착부; 및 상기 지지접착부와 태양전지모듈 사이에 충진되는 충진재;를 포함하고, 상기 지지접착부와 충진재를 통하여 상기 패턴 글라스와 태양전지모듈을 일체화하며, 상기 지지접착부의 높이는 상기 패턴부재의 높이보다 크게 형성되어 상기 패턴부재와 상기 충진재 사이에 공기층 형성을 위한 간극이 구비될 수 있다.
Patent WO-2020040369-A1 (WO)
Title: Method for manufacturing compound semiconductor solar cell
Inventor: HEO YOUNHO
IPC: H01L31/0224
Filed: 2019-01-08
Abstract: A method for manufacturing compound semiconductor solar cell according to one aspect of the present invention comprises the steps of: forming a compound semiconductor layer on a sacrificial layer using a regular growth method; attaching a first lamination film onto the first surface of the compound semiconductor layer using an adhesive including an acrylic resin; separating the compound semiconductor layer and the first lamination film from a mother substrate by removing the sacrificial layer through an ELO process; forming a rear electrode on the second surface of the compound semiconductor layer; attaching a second lamination film onto the rear electrode; removing the first lamination film; and forming a front electrode on the first surface of the compound semiconductor layer, wherein the step of removing the first lamination film uses any one method selected from the methods for: (1) delaminating using a force of 0.2 to 5N/25mm; (2) delaminating after heating at a temperature of 60 to 200℃ for 5 seconds to 20 minutes; (3) delaminating after radiating light having a wavelength of 200 to 400 nm at an intensity of 20 to 600mJ/㎠; and (4) delaminating using one or more solvents of acetone (2-propanone), isopropyl alcohol (isopropanol), 1-methyl-2-pyrrolidone (NMP), and dimethyl sulfoxide (DMSO).
Patent WO-2019151720-A1 (WO)
Title: Method of setting operational authority for electric motorcycle
Inventor: ZU SEUNG DON
IPC: H04W4/60
Filed: 2019-01-25
Abstract: The present invention relates to a method of setting an operational authority for an electric motorcycle to set an operational authority of a driver, an operational time, and an operational region for an electric motorcycle. The present invention comprises: a product registration step of pre-registering mapping information of an ID of an electric motorcycle and manager information in a management server; a manager registration step of completing a manager registration with the electric motorcycle using the mapping information when the management server receives the ID from the electric motorcycle; a driver registration step of performing a driver registration on the electric motorcycle through a pairing with the electric motorcycle, when the management server receives driver information from a driver terminal; and an operational authority registration step of completing, when the management server receives a registration request of operational authority information from a manager terminal, a registration of the operational authority information for the electric motorcycle through a pairing with the electric motorcycle, by the driver terminal, using the operational authority information.
Patent WO-2019160348-A1 (WO)
Title: Electronic device acquiring user input when in submerged state by using pressure sensor, and method for controlling electronic device
Inventor: PARK JUNGHOON
IPC: G06F3/041
Filed: 2019-02-14
Abstract: According to various embodiments, disclosed is an electronic device comprising: at least one sensor; a display comprising a touch panel; at least one pressure sensor disposed in the upper or lower layer of the touch panel such that pressure applied to at least a part of a region of the display can be sensed; and at least one processor, wherein the at least one processor is configured so as to: sense whether the electronic device is in a submerged state by using the at least one sensor or the display; receive a user input with respect to the at least a part of a region of the display while the electronic device is sensed to be in the submerged state; acquire the pressure and the position of the user input by using the at least one pressure sensor; and process the user input on the basis of the acquired pressure and the acquired position. Additional various embodiments identified through the specification are possible.
Patent WO-2020184748-A1 (WO)
Inventor: CHAE JONGHOON
IPC: B60W30/18
Filed: 2019-03-11
Abstract: An embodiment of the present invention provides an artificial intelligence device for controlling an auto-stop function, the artificial intelligence device comprising: an input unit for receiving at least one of image information and sound information relating to the periphery of a vehicle; a communication unit for receiving data from an external device; a storage unit for storing an auto-stop function control model; and a processor for obtaining input data about traffic information through at least one of the input unit and the communication unit, obtaining base data used to determine the control of the auto-stop function from the input data, determining a control mode of the auto-stop function by using the base data and the auto-stop function control model, and controlling the auto-stop function according to the determined control mode, wherein the control mode is one of an activation mode for activating the auto-stop function and a deactivation mode for deactivating the auto-stop function.
Patent WO-2019216575-A1 (WO)
Inventor: KIM JANG-JOO
IPC: C07D491/147
Filed: 2019-04-23
Abstract: 본 발명의 일 측면에 따라, 화학식 1로 표시되는 축합환 화합물이 제공된다.본 발명의 다른 측면에 따라, 제1전극; 제2전극; 상기 제1전극 및 상기 제2전극 사이에 개재된 발광층을 포함하는 유기층을 포함하고; 상기 유기층은 상기 화학식 1로 표시되는 축합환 화합물을 포함하는, 유기 발광 소자가 제공된다.
Patent WO-2019209032-A1 (WO)
Title: Vehicle terminal for controlling v2x message transmission between vehicle terminals through v2x service in wireless communication system and communication control method thereof
Inventor: LEE KI-DONG
IPC: H04W40/10
Filed: 2019-04-24
Abstract: The present disclosure relates to a vehicle terminal for controlling a V2X message transmission between vehicle terminals through a V2X service in a wireless communication system and a communication control method thereof. The communication control method of the vehicle terminal according to the present disclosure comprises the steps of: receiving a V2X message from a first external vehicle terminal; determining whether to transmit the V2X message to a second external vehicle terminal located within a coverage area of the vehicle terminal on the basis of relay information indicating whether the V2X message is relayed; and transmitting the V2X message to the second external vehicle terminal, if it is determined that the V2X message is to be transmitted to the second external vehicle terminal, wherein the relay information includes at least one of active state information, relay probability information, and remaining lifespan information.
Patent WO-2019212243-A1 (WO)
Title: Apparatus and method of transmitting and receiving message 3 protocol data unit
Inventor: AGIWAL ANIL
IPC: H04W74/08
Filed: 2019-04-30
Abstract: A communication method and system for converging a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method by a terminal for transmitting a message 3 (Msg3) in a random access procedure is provided.
Patent WO-2020009420-A1 (WO)
Title: Cigarette
Inventor: HWANG JUNG SEOP
IPC: A24D3/18
Filed: 2019-07-02
Abstract: Disclosed is a cigarette comprising: a tobacco rod; a support segment positioned at the downstream end of the tobacco rod; a cooling segment positioned at the downstream end of the support segment; and a mouth piece positioned at the downstream end of the cooling segment. The cigarette, according to one embodiment, comprises the mouth piece which comprises: a center portion formed from an uncompressed polymer material; and an outer portion formed from a compressed polymer material and surrounding the center part.
Patent WO-2020085626-A1 (WO)
Title: Complex treatment device
Inventor: KIM JI HOON
IPC: A61N5/06
Filed: 2019-08-13
Abstract: Disclosed is a complex treatment device which comprises: a pair of probes including an optical source module for radiating a light for laser treatment; and a body for supplying power to the probes according to an operation of a power switch, wherein the probes and the body are connected to each other in a wired or wireless manner, and the probes can be replaced with other probes including different optical source modules according to a treated portion and a symptom. According to the present invention, the portability and the human body-coupling force of the device can be improved by reducing the weights of probes according to weight distribution.
Patent WO-2020045918-A1 (WO)
Inventor: CHOI SANG GYU
IPC: H02J3/38
Filed: 2019-08-26
Abstract: An embodiment provides a DC-DC converter for sensing a grounded state and a method for controlling same in a photovoltaic energy storage system. Specifically, the converter can sense a grounded state on the basis of the magnitude of voltage applied to a resistor and provide a notification.
Patent WO-2020060173-A1 (WO)
Title: Procédé de fabrication d'élément
Inventor: KIM YONGNAM
IPC: H01L51/42
Filed: 2019-09-18
Abstract: La présente invention concerne un procédé de fabrication d'un élément, le procédé comprenant : une étape de préparation d'un premier stratifié comprenant une première couche tampon et une deuxième couche tampon ; une étape consistant à préparer un second stratifié comprenant une troisième couche tampon disposée sur une électrode de carbone ; et une étape consistant à joindre le premier stratifié et le deuxième stratifié de telle sorte que la deuxième couche tampon et la troisième couche tampon entrent en contact l'une avec l'autre.
Patent WO-2020076044-A1 (WO)
Inventor: LEE KYE HOON
IPC: H01L51/50
Filed: 2019-10-08
Abstract: A display panel, including a light source configured to emit blue light; and a quantum dot color filter layer including: a red light converter including a red quantum dot particle configured to convert the blue light into red light, a green light converter including a green quantum dot particle configured to convert the blue light into green light, a light transmitting portion configured to transmit the blue light, and a white light generator including a first region and a second region, wherein the first region comprises a plurality of yellow quantum dot particles configured to convert the blue light into yellow light, wherein the second region transmits the blue light.
Patent WO-2021125381-A1 (WO)
Inventor: KIM JEONG-GEUN
IPC: G01S13/536
Filed: 2019-12-18
Abstract: The present invention relates to an FMCW radar transmission and reception apparatus that radiates, via a transmission antenna, a beat frequency signal of a frequency modulation continuous wave (FMCW) and then receives, via a reception antenna, a reflected signal obtained from the radiated frequency modulation continuous wave (FMCW) signal that is reflected by a target and returns, wherein the frequency of a beat signal of a frequency modulation continuous wave (FMCW) radar can be effectively adjusted by configuring a plurality of phase locked loops (PLLs) used in a transmitter and a receiver, and using the same reference oscillation signal for the plurality of PLLs.
Patent WO-2020141823-A1 (WO)
Inventor: SHIN SANG-HO
IPC: H04N19/124
Filed: 2019-12-30
Abstract: La présente invention concerne un dispositif d'encapsulation de contenu de DRM, un système d'encapsulation de contenu de DRM comprenant ledit dispositif et un procédé d'encapsulation de contenu de DRM, pouvant réduire le temps et la quantité de calculs dont a besoin l'encapsulation de DRM, indépendamment de la taille d'un contenu d'image. Le dispositif d'encapsulation de contenu de DRM selon un mode de réalisation de la présente invention comprend : un module de décodage permettant de décoder un contenu d'image à l'aide d'un décodeur CABAC ; un module d'encapsulation de contenu de DRM qui réalise une encapsulation de DRM par sélection, à partir de données dérivées à l'aide du résultat du décodage par le module de décodage, de données de coefficient de transformée quantifié (QTC) et par réalisation d'un calcul XOR sur un train de bits des données QTC sélectionnées et sur un train de bits de métadonnées DRM ; et un module de codage permettant de coder, à l'aide d'un codeur CABAC, une trame d'image sur laquelle une encapsulation de DRAM a été réalisée.
Patent WO-2021112328-A1 (WO)
Inventor: YEON JANG YUL
IPC: G06Q30/06
Filed: 2020-01-14
Abstract: One embodiment of the present invention relates to a body size measuring device for customized underwear production and a system therefor. For a customer who desires customized underwear production, a 3D body shape of the customer can be generated using a 3D scanner, points required for the customized underwear production can be selected from among all points forming the 3D body shape, thereby calculating coordinate data values and the like of the selected points, and the customer's body size information can be more accurately calculated on the basis of the coordinate data values of the respective points. As a result, it is possible to produce underwear that fits the customer's body more comfortably than commercially available underwear produced by manufacturers in a standardized manner, thereby contributing to increased customer satisfaction.
Patent WO-2020246778-A1 (WO)
Inventor: NAM GUNG KI
IPC: B23K9/12
Filed: 2020-06-02
Abstract: The present invention relates to a welder integrated with welding tongs, the welder having positive (+) and negative (-) output terminals, either of which is formed as the welding tongs, and is integrally fastened to a main body so that a single ground line is not required, and thus the present invention resolves problems of cost and usage, caused by the ground line and can increase output efficiency to be higher than that of a conventional welder.
Patent WO-2021020947-A1 (WO)
Inventor: KIM MOUNG GON
IPC: H01L51/50
Filed: 2020-07-31
Abstract: The present specification pertains to an organic light-emitting device comprising: a first electrode; a second electrode provided facing the first electrode; and an organic material layer provided between the first electrode and the second electrode, wherein the organic material layer includes a layer containing a compound of chemical formula 1 and a layer containing a compound of chemical formula 2.
Patent WO-2021235634-A1 (WO)
Title: Golf course divot detection system, and detection method using same
Inventor: SHIM CHUL KYU
IPC: G06T7/33
Filed: 2020-11-27
Abstract: The present invention relates to a golf course divot detection system which reads multispectral images and RGB images to identify divot objects and which detects, on the basis of the identifying result, a divot object from a multispectral image obtained by capturing the golf course, and may comprise: an unmanned aerial vehicle which is equipped with a multispectral camera and an RGB camera, and which captures the golf course; and a course keeper server including a machine learning module, which uses a primary reading result of a multispectral image captured by the unmanned aerial vehicle and a secondary reading result of an RGB image so as to identify divot objects, a communication module for receiving a multispectral image captured by the unmanned aerial vehicle, a detection module for detecting a divot object from the received multispectral image, and an output module for displaying map coordinates of the detected divot object.
Patent WO-2022145531-A1 (WO)
Inventor: YOO JIN-HO
IPC: F25D17/02
Filed: 2020-12-30
Abstract: 냉각 시스템이 개시된다. 본 발명의 냉각 시스템은, 냉각 대상에 설치되고 제1 냉매의 유로를 형성하는 제1 냉각 파이프를 구비하는 제1 냉각 유닛; 그리고 상기 냉각 대상에 설치되고 제2 냉매의 유로를 형성하는 제2 냉각 파이프를 구비하는 제2 냉각 유닛을 포함하고, 상기 제1 냉각 파이프는, 상기 냉각 대상의 제1 측에 인접하며 상기 제1 냉매가 유입되는, 제1 냉각 파이프 제1 단부; 그리고 상기 냉각 대상의 제2 측에 인접하며 상기 제1 냉매가 배출되는, 제1 냉각 파이프 제2 단부를 구비하며, 상기 제2 냉각 파이프는, 상기 냉각 대상의 제1 측에 인접하며 상기 제2 냉매가 배출되는, 제2 냉각 파이프 제1 단부; 그리고 상기 냉각 대상의 제2 측에 인접하며 상기 제2 냉매가 유입되는, 제2 냉각 파이프 제2 단부를 구비할 수 있다.
Patent WO-2021177670-A1 (WO)
Inventor: PARK SEUNG WOOK
IPC: G07C5/08
Filed: 2021-02-26
Abstract: Disclosed is a centralized cloud storage system for collecting vehicle-generated data from a plurality of vehicles, and managing same. In the proposed system, EDR/DSSAD data recorded in each vehicle are separated from vehicle identification information (VII) enabling a third party to identify or track each vehicle, and are stored and managed along with link data in databases on a network. The link data may be cryptographically generated and reconstructed on the basis of the VII and a salt. Thus, by deleting the salt from the databases, the association between the EDR/DSSAD data associated with the VII may be removed.
Patent WO-2022163924-A1 (WO)
Inventor: BAE JEE YEON
IPC: C12N15/77
Filed: 2021-04-09
Abstract: The present application relates to a novel 5,10-methylenetetrahydrofolate reductase variant, Corynebacterium stationis strain comprising the variant, and a method for producing L-valine using the strain.
Patent WO-2021221357-A1 (WO)
Inventor: PARK DUCK HOON
IPC: G06F1/16
Filed: 2021-04-14
Abstract: An elastic member according to an embodiment includes a first surface and a second surface opposite to the first surface, and a first area and a second area, wherein the first area is defined as a folding area, the second area is defined as an unfolding area, a first pattern portion having an intaglio shape and a second pattern portion having a embossed shape are formed in the first area, the second pattern portion includes a plurality of 2-1 pattern portions and a plurality of 2-2 pattern portions that are spaced apart from each other, and the 2-2 pattern portions are disposed between the 2-1 pattern portions at a position overlapping with an imaginary line parallel to a folding axis of the elastic member.
Patent WO-2021230611-A1 (WO)
Title: Motor
Inventor: WOO SHUNG HUN
IPC: H02K7/00
Filed: 2021-05-11
Abstract: The present invention can provide a motor comprising a rotor and a stator arranged to correspond to the rotor, wherein: the rotor includes a rotor core and a magnet arranged on the rotor core; the rotor core includes a first rotor core and a second rotor core that are arranged in the axial direction; the magnet includes a first magnet arranged on the first rotor core, and a second magnet arranged on the second rotor core and spaced from the first magnet; and the side surface of the first magnet has a first incline formed in the axial direction, and a side surface of the second magnet has a second incline formed in the axial direction.
Patent WO-2021230719-A1 (WO)
Title: Camera module
Inventor: SONG YUN SANG
IPC: G03B17/12
Filed: 2021-05-14
Abstract: The present embodiment relates to a camera module comprising: a housing including a first surface; a holder including a lens, and including a second surface which faces the first surface and is formed on the outer surface of the holder; and a guide member disposed between the first surface and the second surface, wherein the first surface and the second surface have curved surfaces, the curved surface of the second surface is a curved surface of which the central portion further protrudes outward than the top and bottom thereof, and the curved surface of the first surface is a curved surface of which the central portion is more recessed than the top and bottom thereof.