baber/WOPTO huggingface dataset:
Patent KR-20010082187-A (KR)
IPC: H04W24/00
Filed: 1999-08-24
Abstract: 통신 장치(100)는 정보 패킷(304)의 제1 부분을 수신한다.  그렇지 않으면 정보 패킷(310, 314)의 제2 부분을 수신하기 위해 할당된 기간 동안 통신 장치는 통신 자원 그룹의 신호 품질을 결정한다.  통신 장치는 정보 패킷(316)의 제2 부분의 재전송을 요구한다.
Patent KR-20010090599-A (KR)
IPC: H01L21/768
Filed: 1999-10-27
Abstract: 트랜지스터 어레이는 복수개의 트랜지스터를 포함하는데, 각 트랜지스터는 이미터를 포함한다. 이미터 영역 콘택트는 각 이미터 영역 상부에 놓인다. 최소한 1개의 베이스 영역이 각 이미터 영역 하부에 놓이고 어레이 내의 복수개의 트랜지스터에 공통이다. 최소한 1개의 베이스 콘택트가 상기 최소한 1개의 베이스 영역 상부에 놓이고 각 트랜지스터와 결합된다. 복수개의 베이스 콘택트가 어레이 내의 최소한 2개의 트랜지스터와 공통이다. 최소한 1개의 콜렉터 리치 쓰루가 각 트랜지스터와 결합된다. 콜렉터 리치 쓰루 콘택트는 각 콜렉터 리치 쓰루 상부에 놓인다. 전기 전도성 물질로 된 매몰층 부콜렉터 영역은 상기 콜렉터 리치 쓰루 영역을 각 트랜지스터의 상기 콜렉터 페데스탈 영역에 전기적으로 연결시킨다.
Patent KR-20010103732-A (KR)
IPC: H04J3/16
Filed: 1999-12-14
Abstract: 본 발명은 동일한 통신 프로토콜내에서 패킷 데이터, 음성 및 팩스/모뎀 통신들을 병합하기 위한 시스템 및 방법을 제공한다.  본 발명의 일례의 실시예들에 따라, 종래의 TTL 프레임의 비사용 모드 코드 값들은 하나의 TTL 프레임에 음성 및 팩스/모뎀과 함께 패킷 데이터를 통합하도록 조정된다.  따라서, 통신 리소스들이 보다 효율적으로 사용된다.
Patent KR-20020005582-A (KR)
IPC: H01L21/306
Filed: 2000-11-24
Abstract: 균열(均熱)성, 열응답성 및 형상 안정성이 극히 우수한 다공질 탄화규소 소결체.  다공질 소결체는, 탄화규소결정(21, 22)에 의해 구성되고, 그 탄화규소결정의 조직 중에는 개방기공(23)이 존재하고 있다.  탄화규소결정의 평균 입자직경은 20㎛ 이상, 기공율이 40% 이하, 열전도율이 80W/m·K 이상이다.
Patent KR-20010089639-A (KR)
IPC: G06F13/00
Filed: 2000-12-07
Abstract: 본 발명에 따른 휴대전화기(및 단말장치)는, 복수의 입력모드를 가짐과 동시에 조작키를 구비하여, 현재의 입력모드에 관련된 종류의 데이터를 조작키의 조작에 응하여 입력하는 조작수단(25), 조작수단(25)에 의한 데이터의 입력을 허용한 사용자 인터페이스를 제공하는 사용자 인터페이스 프로세스(23), 및 사용자 인터페이스 프로세스(23)의 지시에 따라 조작수단(25)에 있어서 현재의 입력모드를 전환하는 입력모드 설정수단을 구비한다. 상기 사용자 인터페이스 프로세스(23)는 수신수단(21)에 의해 수신된 HTML 데이터를 해석/실행수단(22)이 해석 ·실행하는 것으로 생성된다. 상기 조작수단(25)에 의해 입력되는 데이터의 종류는 상기 사용자 인터페이스 프로세스(23)의 지시에 따라 전환될 수 있다.
Patent KR-20020010143-A (KR)
Title: 3종 이상의 상이한 제올라이트를 함유한 제올라이트결합된 촉매 및 탄화수소 전환에서의 이들의 용도
IPC: C01B39/02
Filed: 2000-05-05
Abstract: 본 발명은 상당량의 비-제올라이트계 결합제를 함유하지 않고, 촉매 성능이 최적화되도록 개조할 수 있는 제올라이트 결합된 제올라이트 촉매, 및 상기 제올라이트 결합된 제올라이트 촉매를 사용하는 탄화수소를 전환시키는 방법에 관한 것이다.  제올라이트 결합된 제올라이트 촉매는, 제 1 제올라이트의 제 1 결정 및 상기 제 1 제올라이트와 상이한 조성, 구조형 또는 둘다를 갖는 제 2 제올라이트의 선택적인 제 2 결정을 함유하는 코어 결정; 및 제 3 제올라이트의 제 3 결정 및 상기 제 3 제올라이트와 상이한 조성, 구조형 또는 둘다를 갖는 제 4 제올라이트의 제 4 결정을 함유하는 결합제 결정을 포함한다.  코어 결정이 제 2 제올라이트의 제 2 결정을 함유하지 않는 경우, 결합제 결정은 제 4 제올라이트의 제 4 결정을 함유해야만 한다.  제올라이트 결합된 제올라이트는 탄화수소 전환 공정, 예를 들어 촉매작용 분해반응, 알킬화 반응, 톨루엔의 불균등화 반응, 이성질화 반응 및 알킬교환 반응에서의 용도를 갖는다.
Patent KR-20020003388-A (KR)
IPC: H04N21/6332
Filed: 2001-02-28
Abstract: CE 장치 상의 고정된 HDD의 스토리지 공간의 이용 가능한 량은 데이터 네트워크를 통해 조정 가능하다. 소비자는 HDD의 설정을 원격 제어하는 제 3자 서비스를 통해 장치를 업그레이드 할 수 있다.
Patent KR-20020019440-A (KR)
Title: Dlc film, dlc-coated plastic container, and method and apparatus for manufacturing dlc-coated plastic container
IPC: C23C16/04
Filed: 2000-04-21
Abstract: (57) Abstract: A plastic container is coated with DLC film as a desirable oxygen barrier so that it is suitable for containing oxygen-sensitive or carbonated beverage. A coating device comprises an outer electrode arranged outside a plastic container (5), an inner electrode (11) arranged inside the plastic container (5), a pipe (12) through which carbon source gas is supplied to the plastic container (5) pumped to a low pressure, and a high-frequency oscillator (9) for applying voltage between the outer electrode and the inner electrode (11) after supplying the source gas to generate a plasma for depositing DLC film on the inner wall of the plastic container (5). The outer electrode includes a bottom electrode (4) arranged along the bottom of the plastic container (5) and a wall electrode (3) arranged along the inner wall of the plastic container. The bottom electrode (4) is located below half the complete height of the plastic container (5). <IMAGE>
Patent KR-20020019023-A (KR)
Title: Printed media production
IPC: H04N5/91
Filed: 2000-05-24
Abstract: A method for providing interactivity for printed content is disclosed. An image of a writing surface containing the printed content is captured by an optical imaging pen device. The image includes a pattern printed on the writing surface. A plurality of available options associated with the printed content coincident with the pattern in the image is then determined and a selection from a user of one of the plurality of available options is received. An application is executed, with the execution using the selected option.
Patent KR-20020019069-A (KR)
Title: Layered film and packaging material
IPC: C09D7/61
Filed: 2001-04-10
Abstract: A laminated film is provided which is constituted essentially of a resin substrate and a coated film disposed thereon. The coated film comprises a montmorillonite containing a cation exchanger other than sodium ions and a water-soluble polymer. The laminated film offers a high oxygen-permeability barrier at high humidity and firm bonding between the coated film and the resin substrate at high humidity. A packaging material derived from the laminated film is also provided.
Patent KR-20020013916-A (KR)
IPC: C25C7/06
Filed: 2000-05-30
Abstract: 전해조 바닥에 침전된 고형물의 제거와 관련하여 전해조의 바닥부분을 탱크의 나머지 공간으로부터 분리하는 분리부재 (10) 로서, 상기 분리부재가 전해조 내에 설치될 수 있으며, 또한 전해조 내에 설치된 지지 및 제어부재에 의해 형성된 경로를 따라 탱크로부터 제거될 수 있다.     상기 분리부재 (10) 가 유연한 벽부재 (11) 및 상기 벽부재 (11) 내에 설치된 한세트 이상의 지지부재 (12, 13, 14) 를 포함한다.
Patent KR-20020023990-A (KR)
Inventor: JUNG JEONG HO
IPC: A01K69/00
Filed: 2002-01-03
Abstract: PURPOSE: A fishing gear for catching live fish is provided to reduce the time and the labor required to fold and unfold the fishing gear, thus improving the convenience of carrying and storage thereof. CONSTITUTION: A fish enticement and capture body(2) of the fishing gear for catching live fish comprises an upper frame(6) having an opening and closing door(8); a vertical frame(4) connected to the lower side of the upper frame and having a foldable wall surface member(5), an entrance door(3), and a net(15); a lower frame connected to the lower end of the vertical frame; a clamping device having a spring elastically installed between the upper frame and the lower frame; and a bait container coupled separably to the lower frame.
Patent KR-20020024003-A (KR)
Title: Rice container separately discharging grains
Inventor: SON YOUNG SUK
IPC: A47J47/04
Filed: 2002-01-04
Abstract: PURPOSE: A rice container for separately discharging grains is provided to discharge only a grain selected by a user by preparing containers for respective grains and forming discharge holes for respective grains. CONSTITUTION: A rice container has buttons(1,2,3,4,5,6,9) for separately selecting barley, red beans, mung beans, millet seeds, glutinous rice, Job's tears, and rice, a rice gutter(10), a rice container cover(7), and a minor grain cover(8). Upon pressing the buttons, grains are selectively discharged through respective holes. The internal temperature of the container is kept lower than the external temperature.
Patent KR-20030061231-A (KR)
Title: Airbag cushion folding method for driver
Inventor: KWAK JIN UK
IPC: B60R21/16
Filed: 2002-01-11
Abstract: PURPOSE: A method for folding an airbag cushion for a driver's seat is provided to expand the airbag cushion toward a side in the initial unfolding of the airbag cushion to prevent the expansion pressure of the cushion from being directly influenced on a driver by facing the initial unfolding direction of the cushion toward the driver in a collision. CONSTITUTION: A method for folding an airbag cushion for a driver's seat is composed of steps of vertically expanding the cushion and forming a predetermined volume therein, folding an outer peripheral surface of the expanded cushion into a zigzag corrugated shape with dividing a perpendicular length of the outer peripheral surface at regular intervals, and perpendicularly contracting the cushion forming zigzag creases(59).
Patent KR-20020061121-A (KR)
Title: Display apparatus and driving method of same
Inventor: NAGATA HISASHI
IPC: G09G3/36
Filed: 2002-01-12
Abstract: PURPOSE: A display apparatus and a driving method of the display apparatus are provided to reduce power consumption easily and sufficiently while meeting brightness, contrast, response speed, and gradation. CONSTITUTION: A method of driving a display apparatus includes a screen which has pixels arranged in a matrix. The method produces a display by applying a scanning signal to scanning signal lines connected to the pixels and thus selecting a line to scan the screen and also by supplying a data signal to those pixels on the selected line via data signal lines. The method comprises the step of providing, after scanning the screen twice or more, an idle period(T2) in which all the scanning signal lines are caused to be in a non-scanning state for a period(T1) longer than a time taken to scan the screen once.
Patent KR-20030070175-A (KR)
Title: Method for preparing polyethylenenaphthalate
Inventor: CHOI SU MYEONG
IPC: C08G63/78
Filed: 2002-02-21
Abstract: PURPOSE: A method for preparing polyethylene naphthalate is provided, to reduce the time for solid state polymerization and to minimize the fusion, thereby obtaining a polyethylene naphthalate polymer having uniform physical properties. CONSTITUTION: The method comprises the steps of melt polymerizing the product of esterification of naphthalenedicarboxylate and diol in the presence of 10-120 ppm of a Ti catalyst, to obtain the precursor chip of polyethylene naphthalene; firstly drying the precursor chip by using a hot wind of 70-100 deg.C for 4 hours or more; secondly drying the precursor chip under an inert gas condition or in vacuum at a temperature of 100-190 deg.C for 4 hours or more; and preparing polyethylene naphthalate by the solid state polymerization of the precursor. Preferably the precursor chip has a melt viscosity of 0.2-0.6 dl/g and a size of 0.5 mm x 0.5 mm x 0.5 mm to 1.5 mm x 1.5 mm x 1.5 mm.
Patent KR-20030070490-A (KR)
Title: a filtration plant water sand filter
Inventor: IM YONG TAEK
IPC: C04B14/06
Filed: 2002-02-25
Abstract: PURPOSE: A method for preparing filtering sand for a water purifying plant is provided, to obtain filtering sand whose quartz content is relatively high compared with common natural sand. CONSTITUTION: The method comprises the steps of (1) digging silica, feldspar, granite and elvan; (2) firstly pulverizing the dug rocks; (3) secondly pulverizing the firstly pulverized one; (4) sorting the secondly pulverized one; washing the sorted one in a washing device(5) provided with a sprinkler(6); and (7) packing the washed one.
Patent KR-20030073714-A (KR)
Title: The ununiform rotary transmission and control method which is using the pump and compressor
Inventor: AN BYEONG YEOL
IPC: F04B49/20
Filed: 2002-03-13
Abstract: PURPOSE: A method and an apparatus for ununiform rotary transmission using in a pump and a compressor are provided to improve efficiency by reducing maximum torque during compression. CONSTITUTION: A variable link(7) has variable length as having a small cylinder therein to pop in and out, and is connected with a driving axis of a driving unit so as to rotate within smaller angle on suction stroke when a piston(6) moves from a top dead center to a bottom dead center, and to rotate within larger angle on compression stroke when the piston moves from the bottom dead center to the top dead center. Alternatively, a double link is used. A power axis is allowed thereby to rotate over 180 deg. during compression stroke with larger resistance, and rotate less than 180 deg. during suction stroke with smaller resistance so as to increase torque a little during suction while reducing maximum torque during compression. Capacity of a driving mechanism for a compressor or a pump is allowed to be reduced thereby to improve efficiency of the compressor or the pump, and to reduce cost.
Patent KR-20030073962-A (KR)
Title: A method for preparation of oral microcapsule and oral composition containing the microcapsule powder prepared by the same
Inventor: KANG GYE HONG
IPC: A61K8/97
Filed: 2002-03-14
Abstract: PURPOSE: A method for producing an oral microcapsule by dispersing plant extracts having effects of preventing and treating oral disease in a water insoluble solvent and then spraying the obtained emulsion solution while cooling is provided. The effective component of the composition has enhanced stability and is slowly released and the composition, therefore, has excellent effects of preventing periodontal disease and dental cavity and inhibiting bad breath. CONSTITUTION: Rosin salt as an effective component for oral is dispersed in a water insoluble solvent in emulsion form in a weight ratio of 1:0.5 to 30 to produce an emulsion solution. Then, the emulsion solution is sprayed, cooled and then dried to produce a spherical oral microcapsule. The oral composition contains 0.05 to 5% by weight of the oral capsule, based on the total weight of the oral composition. The rosin salt is obtained by blending a pine needle extract and salt in a weight ratio of 1:0.1 to 10.
Patent KR-20030075633-A (KR)
Title: Mirror for smile face and angry face
Inventor: SHIN SUK KYUN
IPC: B44C1/00
Filed: 2002-03-20
Abstract: PURPOSE: A device for comparing two looks on one face with a mirror is provided to configure a rotation axis, and to alternately show a smiling face and an angry face by rotating a face plate, thereby enabling a user to control the user's looks by seeing the mirror. CONSTITUTION: A case(10) builds a motor(40) having a protruded motor axis(41), a power supplying device(42) for supplying power to the motor(40), and a power supplying line(43) thereon, and is coupled with a back plate(11). An advertisement attaching unit(13) is formed in an upper part of the case(10). The motor axis(41) of the motor(40) is formed in a center. A rotation plate(30) forms a face(31) having two looks on the motor axis(41). An inserting groove(12) is formed in a lower part of the case(10). A mirror(14) is fixed into the inserting groove(12). A transparent cover(20) folded from a front surface of the case(10) is coupled.
Patent KR-20030076035-A (KR)
Title: refrigerator/heat pump system
Inventor: CHOI TAE YOUNG
IPC: F25B30/02
Filed: 2002-03-22
Abstract: PURPOSE: A freezing and heat pump system is provided to recover waste heat contained in hot liquid refrigerant flowed out of a condenser and entered into a liquid-gas heat exchanger, to prevent refrigerant entering a compressor from being overheated and to totally improve the performance coefficient of the system. CONSTITUTION: A freezing and heat pump system is composed of a compressor(210) for compressing refrigerant in high temperature and pressure; a condenser(220) for condensing the high temperature and pressure refrigerant flowed out from the compressor and exchanging heat with the outside; a liquid-gas heat exchanger(230) for recovering waste heat contained in the liquid refrigerant passed through the condenser; an expansion valve(240) for expanding the refrigerant passed through the liquid-gas heat exchanger in low pressure; an inner heat exchanger(250) for partly evaporating the low pressure refrigerant passed by the expansion valve, heat-exchanging inwardly the refrigerant passed through the evaporator, and using the heat of vaporization; an evaporator(260) for heat-exchanging the low temperature and pressure refrigerant passing through the inner heat exchanger with the air; and a circulating pump(270) for circulating a part of the refrigerant passing through the liquid-gas heat exchanger and entering the compressor into the inner heat exchanger using the heat of vaporization.
Patent KR-20030076862-A (KR)
Title: Chair for a fishing
Inventor: YANG EUN WOO
IPC: A01K97/22
Filed: 2002-03-23
Abstract: PURPOSE: A chair for fishing is provided to function as a chair and a support for a fish hook by installing the support to a main body of an icebox and using an upper surface of the icebox as the chair and to be installed stably to an uneven land by using a height adjusting device. CONSTITUTION: A chair(10) for fishing includes an icebox(100), a support(300) for fishing, a height adjusting portion(200), a back rest(500) of the chair, a hanging bar(400) for a bait tub and a shoulder belt(600). An insulation device is installed to the icebox which is opened and closed on an upper portion. The support for fishing connected to an upper surface of the icebox supports a knob of a fishing rod. Height adjusting portions are installed to one side of the icebox and operated independently each other to adjust height of the icebox. The back rest of the chair is installed to the upper surface of the icebox to be moved. The hanging bar of the bait tub is installed to a front surface of the icebox. The shoulder belt is installed to front and rear surfaces of the icebox to carry the icebox. Therefore, the icebox is used as the chair and the support for fishing. The icebox is installed stably in an uneven land with the height adjusting portion.
Patent KR-20020076141-A (KR)
Inventor: HATTORI TAKESHI
IPC: C23C14/06
Filed: 2002-03-25
Abstract: PURPOSE: A transparent electroconductive film and a process for producing the same are provided to produce an InSbO4-containing transparent electroconductive film having a high electroconductivity and a superior transparency. CONSTITUTION: A process for producing an InSbO4-containing transparent electroconductive film comprises the step of sputtering simultaneously a target(A) for sputtering, which comprises In, Sb and O, and whose atomic ratio of Sb/In is from 0.9 to 1.1, and a target(B) for sputtering, which comprises Sb.
Patent KR-20030080348-A (KR)
Title: Circuit for supplying stable voltage
Inventor: NAM YEONG JUN
IPC: G11C5/14
Filed: 2002-04-08
Abstract: PURPOSE: A voltage supply circuit is provided to test an operation voltage margin of an internal circuit easily by additionally comprising a test mode. CONSTITUTION: A reference signal generation part(200) outputs a reference voltage by distributing a power supply voltage constantly during a test mode. A voltage output part(100) outputs an internal operation voltage generated by an input signal stably by being enabled by the input signal of a constant voltage level, and outputs the reference voltage as the internal operation voltage when the reference voltage is higher than the input signal. And a test mode selection unit(300) controls to convert its mode into the test mode when the input signal disables or enables the reference voltage generation part.
Patent KR-20030082305-A (KR)
Title: Elsastic fabrics comprising illite and manufacturing method thereof
Inventor: KWAK RHO HEUNG
IPC: D06M11/00
Filed: 2002-04-17
Abstract: PURPOSE: Provided is an elastic fabric containing illite which generates anions and makes far-infrared radiation to effect diaphoresis and heat insulation, disinfection and deodorization. CONSTITUTION: The elastic fabric comprises a rubber mixture sheet with 18-22 wt.% of illite and natural or synthetic rubber, and an elastic fabric member. The elastic fabric member is attached to one lateral side or both sides of the rubber mixture sheet. A method of manufacturing the elastic fabric comprises the steps of: mixing 18-22 wt.% of illite with natural or synthetic rubber to make a rubber mixture; forming the rubber mixture in the shape of a sheet; and coating adhesives to one lateral side or both sides of the rubber mixture sheet, followed by pressurizing an elastic fabric member thereon at 120-130 deg.C with the pressure of 4.5-5.5.
Patent KR-20030083765-A (KR)
Inventor: PACK WON JUN
IPC: A23B7/02
Filed: 2002-04-22
Abstract: PURPOSE: Provided is a natural drying device for agriculture and marine products which takes up small space and dries a great amount of agriculture and marine products without special installation. CONSTITUTION: A natural drying device for agriculture and marine products is characterized by comprising a main body to form its inside into hollow; a plurality of legs which are fixed to the lower part of the main body to fix the main body to the ground; a guiding bench, as a projection part, to form its inside into hollow; a plurality of drying benches which are inserted to move along with the length of the guiding bench and linked each other by interval maintaining holes; and a drying bench operating unit which moves the drying bench along with the length of the guiding bench.
Patent KR-20020043486-A (KR)
Inventor: CHOI HYEONG SEON
Filed: 2002-04-29
Abstract: PURPOSE: An on-line franchising method is provided to enable small-sized web sites to supply various kinds of commodities and services to clients at low price by managing an independent site using an exclusive URL. CONSTITUTION: In an on-line electronic commerce method, a franchiser(120) processes a commodity supply, a commodity delivery, and a payment management by cooperating with a provider(110). A joining site(130-n) joined in the franchiser(120) by paying a predetermined special contract cost performs a business independently in a site having a URL independent of the URL of the franchiser(120). If the independent site is a conventional site for supplying other service, a commercial transaction page is appended in a corresponding site, and the joining site(130-n) is opened. If the independent site is new site or does not possess a web server, the joining site(130-n) constructs a homepage for a commercial transaction at a wanted URL and requests a web hosting to the franchiser(120).
Patent KR-20020092179-A (KR)
Inventor: INOUE TOMOYUKI
IPC: H05K1/03
Filed: 2002-04-30
Abstract: PURPOSE: To provide a photosensitive insulating paste composition developable with an alkali developing solution or water, having high sensitivity and capable of forming a high-precision pattern of a large film thickness and to provide a photosensitive film using the composition. CONSTITUTION: In the photosensitive insulating paste composition containing an organic component and an inorganic powder, the organic component comprises (i) a water-soluble cellulose derivative, (ii) a photopolymerizable monomer, (iii) an acrylic resin having hydroxyl groups and (iv) a photopolymerization initiator.
Patent KR-20030086004-A (KR)
Title: Method for manufacturing mim type capacitor of semiconductor device
Inventor: LEE GANG HYEON
IPC: H01L27/04
Filed: 2002-05-03
Abstract: PURPOSE: A method for manufacturing an MIM capacitor of a semiconductor device is provided to be capable of minimizing leakage by forming a spacer at sidewalls of an upper electrode. CONSTITUTION: A lower metal film(114), the first insulating thin film and an upper metal film are sequentially formed on an interlayer dielectric(100). An upper electrode(130') is formed by selectively etching the upper metal film using the first mask pattern as a mask. After removing the first mask pattern, the resultant structure is cleaned. By depositing the second insulating layer and patterning, a spacer(150') is formed at sidewalls of the upper electrode(130') and the first insulating pattern(120') is formed. A lower electrode is then formed by patterning the lower metal film(114).
Patent KR-20030086390-A (KR)
Title: Vehicle Steering Device
Inventor: KIM JONG HWAN
IPC: B62D1/16
Filed: 2002-05-04
Abstract: PURPOSE: A steering system for a vehicle is provided to improve stability during traveling forward and to control a steering wheel and a column shaft independently and directly by indicating the rotation of the steering wheel through torque change of the column shaft with mounting a shaft support unit in the column shaft. CONSTITUTION: A steering system is composed of an inner shaft(32) rotating, connecting to a steering wheel and a steering assembly, and forming a contact part(33) formed at the side of the outer periphery; an outer shaft(31) surrounding the inner shaft and having a through hole(34); an elastic member(61) combined with the outer shaft to support the contact part elastically; a displacement restricting ring(62) installed in the elastic member to prevent the elastic member from being displaced from the outer shaft; and a return spring(63) installed between the outer shaft and the displacement restricting ring.