baber/WOPTO huggingface dataset:
Patent KR-20010066455-A (KR)
Inventor: LEE JIN GU
IPC: H04B7/26
Filed: 1999-12-31
Abstract: PURPOSE: A method for embodying broadcast services in a mobile communication system is provided to embody broadcast services which can provide mass data in a mobile communication system. CONSTITUTION: If a broadcast service selection is detected from a user(610), an MS(Mobile Station) transmits a short message to request a relevant BS(Base Station) to send a list of broadcast channels in service through a paging channel(611). The BS, receiving the short message, sends the list to the MS through the paging channel by SMS(Short Message Service)(613). If the user selects a broadcast channel from the list, the MS sends an origination message to call to the selected channel to the BS(615,617). The BS sets up a traffic channel to the MS through the paging channel(619). After setting up the traffic channel, the BS begins sending null traffic channel data through the traffic channel(621). Then the BS transmits a channel assignment message to the MS(623). Receiving the channel assignment message, the MS sets up a plurality of assigned traffic channels(625). If 5 consecutive valid frames are received through the traffic channels(627), the MS turns off the power of its transceiver(629). The MS transits the traffic channels to a conversation state(631). The MS receives broadcast data from the BS through the traffic channels in the conversation state(633).
Patent KR-20000068111-A (KR)
Title: 가속도센서용 바이모르프형 압전소자와 그 제조방법
IPC: H01L41/22
Filed: 1998-07-10
Abstract: 본 발명은, 하드디스크나 CD-ROM 등의 각종 기계의 진동검출에 사용되는 압전바이모르프형 가속도센서에 관한 것으로서, 니오브산리튬을 연삭함으로써 자유진동부와 지지체를 일체로 또한 동시에 형성함으로써, 소형·고감도 또한 감도불균일이 작은 저코스트의 가속도센서용 바이모르프형 압전소자를 제공하는 것을 목적으로 한다. 
     니오브산리튬단결정판을 분극방향을 반대로해서 직접 접합한 자유진동부 (32a)의 한쪽편을, 연삭에 의해 자유진동부(32a)를, 비연삭부를 지지체(33a)로해서 1체로 또한 동시에 형성하고, 전극(31a),(31b)을 무전해도금에 의해 형성한다.
Patent KR-20000035936-A (KR)
Inventor: EVERHART DENNIS STEIN
IPC: A61F13/15
Filed: 1997-07-09
Abstract: PURPOSE: This invention relates to permeable materials that are wet table. CONSTITUTION: A permeable, liquid flow control material composed of: 1) a permeable sheet having a plurality of individual exposed surfaces, at least a portion of which have a surface energy of less than about 45 dynes/cm; and 2) amphiphilic proteins adsorbed onto at least some individual exposed surfaces to define a gradient distribution of amphiphilic protein coating along at least one dimension of the permeable sheet so that the adsorbed amphiphilic protein coating provides controlled wettability along at least one dimension of the liquid flow control material. Desirably, the liquid flow control material is substantially free of fugitive amphiphilic proteins. The material may be used as a permeable, body side cover material for absorbent personal care products
Patent KR-20000036123-A (KR)
Title: Semiconductor device and method of fabricating the same
Inventor: MIURA HIDEO
IPC: H01L21/76
Filed: 1997-09-16
Abstract: PURPOSE: A semiconductor device is provided to have a trench isolation structure which has high reliance. CONSTITUTION: In a semiconductor device having a trench isolation structure, after a trench surface is selectively oxidized by a conventional method, an oxidation prevention film is removed, the entire surface of the substrate is again oxidized while only an oxide film on the substrate or trench surface is exposed, and a radius of curvature is provided to the shape of the oxide film near the trench upper end portion.
Patent KR-20000048645-A (KR)
Title: Selective para-xylene production by toluene methylation
Inventor: BROWN STEPHEN HAROLD
IPC: B01J37/10
Filed: 1997-10-02
Abstract: PURPOSE: Provided is a process for the selective production of para-xylene by catalytic methylation of toluene in the presence of a solid catalyst. Also provided is a method for preparing a catalyst which is particularly suited for this reaction. CONSTITUTION: A process for the selective production of para-xylene comprises reacting toluene with methanol in the presence of a catalyst comprising a porous crystalline material having a Diffusion Parameter for 2,2 dimethylbutane of about 0.1-15 per sec. when measured at a temperature of 120°C and a 2,2 dimethylbutane pressure of 60 torr (8kPa). The porous crystalline material is preferably a medium-pore zeolite, particularly ZSM-5, which has been severely steamed at a temperature of at least 950°C. The porous crystalline material is preferably combined with at least one oxide modifier, preferably including phosphorus, to control reduction of the micropore volume of the material during the steaming step.
Patent KR-20000052732-A (KR)
Inventor: FAVRE BULLE OLIVIER
IPC: C12R1/01
Filed: 1997-10-24
Abstract: PURPOSE: A method for preparing 2-hydroxy 4-methylthio butyric acid and/or the ammonium salt of 2-hydroxy 4-methylthio butyric acid by enzymatic hydrolysis of 2-hydroxy 4-methythio butyronitrile is provided. CONSTITUTION: A method is characterized in that: a) in a first step a biologicalmaterial having nitrilase activity is prepared, b) in a second step it is immobilised, c) in a third step, 2-hydroxy 4-methylthio butyronitrile is brought in the presence of the immobilised biological material, for obtaining the ammonium salt of 2-hydroxy 4-methylthio butyric acid, d) in a fourth step, optionally, the salt obtained in step c) is transformed into the corresponding acid, as shown in the figure (1a), and e) in a fifth step, the product resulting from step c) or d) is concentrated.
Patent KR-20000069176-A (KR)
Title: 금속 아세틸리드 화합물 및 그 제조방법
IPC: C07F1/00
Filed: 1998-09-21
Abstract: 본 발명은, 금속 페이스트 등에 사용되는 유기금속착체로서, 유황이나 염소를 함유하지 않은 환경의 청정화에 공헌할 수 있는 신규 화합물과 그의 제조방법에 관한 것이다. 
     신규의 유기금속착체로서, 일반식 M(- C ≡C - R) n (식중의 M은 금속원자, n은 금속원자 M의 원자가수, R은 산소원자를 함유하거나 또는 함유하지 않은 탄소수 1∼8의 탄화수소기)로 표시되는 금속 아세틸리드 화합물을 제공한다. 이 화합물은 유황이나 염소를 함유하지 않기 때문에, 금속 페이스트에 사용될 때 소성하여도 아황산 가스나 염소화합물을 배출하지 않으므로 환경의 청정화에 기여할 수 있다. 
     본 발명에 있어서는, 금속의 환원제로서 고체의 아황산염을 사용하고 있으므로 화학양론적으로 간단히 반응을 제어할 수 있고, 용이하게 금속 아세틸리드 화합물을 얻을 수가 있다. 또한 이 제조방법에 있어서는 아황산 가스가 발생하지 않으므로 환경오염의 염려도 없고, 환경의 청정화에 기여할 수 있다.
Patent KR-20000057388-A (KR)
Inventor: BECK ERICH
IPC: C08F2/50
Filed: 1997-11-18
Abstract: PURPOSE: A photoinitiator mixture containing acylphosphinoxide and benzophenone derivatives, is provided. CONSTITUTION: A photoinitiator mixture contains (a) at least one acyl or diacylphosphinoxide represented by formula I and (b) at least one benzophenone derivative represented by formula II or a mixture of such benzophenone derivatives with other benzophenone derivatives.
Patent KR-20000069602-A (KR)
Title: 별도의 다리 커프스 및 허리 단편을 갖는 흡수 제품의 제조 방법
IPC: A61F5/44
Filed: 1997-11-25
Abstract: 본 발명의 방법은 흡수 제품의 제작 방법에 관한 것이다.  본 발명의 방법에서, 신체측 라이너(12), 흡수 코어(13) 및 외부 커버(14)를 결합시켜 흡수 제품 웹 소시지(22)를 형성시킨다.  다리 개구부(32)는 웹 소시지(22)의 대향면에서 절단시키고, 허리 개구는 웹 소시지(22)의 중앙 구역에서 절단시킨다.  접착제는 (i) 허리 단편 재료 및 (ii) 허리 개구 주위의 웹 소시지(22); 및 (iii) 연신성 다리 커프스 재료 및 (iv) 다리 개구부(32) 주위의 웹 소시지(22) 중 하나에 도포시킨다.  허리 단편(55)는 허리 단편 재료로부터 절단하고, 허리 개구 위에 위치시켜서 웹 소시지(22)에 고정시킨다.  다리 커프스(45)는 다리 커프스 재료로부터 절단하고 다리 개구부 위에 위치시켜서 웹 소시지(22)에 고정시킨다.  허리 단편(55) 및 다리 개구부(32)는 웹 소시지(22)에 결합될 때 스트레치-투-스탑 치수의 약 5% 내지 약 95%를 나타내는 치수로까지 연신되는 것이 바람직하다.
Patent KR-20000062294-A (KR)
Title: 필드 조정가능한 볼트리스 등자
IPC: F22B37/20
Filed: 1997-12-15
Abstract: 적어도 하나의 플랜지(38)를 구비하며 노(10)의 둘레로 연장되는 벅스테이(36)와 협동하는 등자 장치는 노(10) 둘레로 수평으로 연장되는 벽 채널(20)을 포함한다. 또한, 상기 장치는 제 1 및 제 2 단부를 구비하는 연신된 만곡 플레이트(22)를 포함하고, 그 플레이트(22)는 제 1 및 제 2 단부 중간에서 연신된다. 제 1 및 제 2 단부는 벽 채널(20)로부터 이격되는 제 1 및 제 2 단부 중간의 플레이트(22)의 축부분(24)과 함께 벽 채널(20)의 이격부에서 벽 채널(20)에 용접된다. 적어도 하나의 제 1 연신 바(30)는 벽 채널(20)에 면하는 만곡 플레이트(22)의 측부상에 용접되며 만곡 플레이트(22)의 연신 방향에 수직한 방향으로 연장된다. 또한, 상기 장치는 제 1 및 제 2 L-형 리테이너(40, 40)를 포함하고, 각각의 L-형 리테이너(40, 40)는 벅스테이(36)의 플랜지(38) 둘레로 제 1 연신 바로부터 연장하기 위한 크기 및 모양으로 되어 있다. 제 1 및 제 2 L-형 리테이너(40, 40)는 그 축방향으로 이격된 부분에서 제 1 연신 바에 용접된다.
Patent KR-20000075859-A (KR)
Title: 피라진 화합물
IPC: C07D241/26
Filed: 1998-02-26
Abstract: 하기 화학식(I)의 화합물 및 약학적으로 허용가능한 그의 유도체. 
     〈화학식 I〉 
     
       
     
     상기 식에서, 
     R 1 은 하나 이상의 할로겐 원자에 의해 치환된 페닐, 나프틸 및 하나 이상의 
     할로겐 원자에 의해 치환된 나프틸로 구성된 군으로부터 선택되며; 
     R 2 는 -NH 2 및 -NHC(=O)R a 로 구성된 군으로부터 선택되며; 
     R 3 는 -NR b R c , -NHC(=O)R a 및 수소로 구성된 군으로부터 선택되며; 
     R 4 는 수소, -C 1-4 알킬, 하나 이상의 할로겐 원자로 치환된 -C 1-4 알킬, -CN, 
     -CH 2 OH, -CH 2 OR d 및 -CH 2 S(O) x R d 로 구성된 군으로부터 선택되며; 
     여기서, 
     R a 는 C 1-4 알킬 또는 C 3-7 시클로알킬을 나타내며, 
     R b 및 R c 는 동일 또는 상이할 수 있으며, 수소 및 C 1-4 알킬로부터 선택 
     되거나, 또는 이들이 부착되는 질소 원자와 더불어, 하나 이상의 C 1-4   
     알킬로 추가 치환될 수 있는 6-원 질소 함유 헤테로사이클을 형성 
     하며; 
     R d 는 C 1-4 알킬 또는 하나 이상의 할로겐 원자에 의해 치환된 C 1-4 알킬 
     로부터 선택되며; 
     x는 0, 1 또는 2의 정수이며, 
     단, R 2 가 -NH 2 이고 R 3 및 R 4 모두 수소일 때, R 1 은   
     을 나타내지 않는다.
Patent KR-20010006027-A (KR)
Title: 방광내 약물 송달 시스템
IPC: A61K9/16
Filed: 1998-04-02
Abstract: 약물의 지속된 방출을 제공하는, 요도를 통해 방광에 삽입을 위한 생체부식가능한 서방형 제제가 제공된다. 코일필라멘트, 패치 또는 유동성 겔과 같은 카테테르를 통해 삽입가능한 구조가 제공된다. 장치는 방광내에 적소에 있으면서 요로의 봉쇄가 없도록 약물의 지속된 방출 동안 또는 후에 생체 부식된다.
Patent KR-20010013896-A (KR)
IPC: A43B21/28
Filed: 1997-09-25
Abstract: A self-inflatable air cushion (1a) which includes a support chamber (1) mounted in a sole (6) of a shoe and holding a liquid, a collapsible plenum chamber (10) surrounded by the support chamber (1) and partially protruding over the top of the sole (6) and having a top air hole (31), passage means (22, 33) connected between the support chamber (1) and the plenum chamber (10), and one-way valve (101) mounted in the passage means (22, 33) to let flow move in one direction from the plenum chamber (10) to the support chamber (1) upon compression of the plenum chamber (10).
Patent KR-20010068564-A (KR)
Title: Multilingual support system by using graphic formats
Inventor: HAN JAE HO
IPC: G06F17/30
Filed: 2000-01-06
Abstract: PURPOSE: A multilingual search through converting and transmitting a web page into a graphic file is provided for a user to read a wanted web page regardless of kinds of computers, language types, and regions by transmitting an entire screen or a partial of the entire screen of a web page as a graphic file on the Internet without installing a specific software in a computer. CONSTITUTION: A user connects to the second computer using the first computer(1). The first web page is displayed in a screen of the first computer(1), and a user selects the language of the corresponding country to be received a converted transmission to a graphic file(2). The user inputs an Internet address of the second web page to be searched in the first web page(3). The second computer connects to the Internet address of the second web page received from the user(4). The second computer converts the second web page into a graphic file(5). The converted second web page is transmitted to the first computer(6).
Patent KR-20010073278-A (KR)
Title: Method of allocating article codes and searching the article by the code on internet
Inventor: LEE TAE HEON
IPC: G06Q30/00
Filed: 2000-01-13
Abstract: PURPOSE: A code marking and article search method is provided to mark a code at a printed news article, print the news article with the marked code, and enable a user to easily search the news article related information by using the marked code over the Internet. CONSTITUTION: The method comprises steps of editing contents of news articles to be printed, and categorizing the news articles(201), allocating URLs at the edited news articles, and registering them at a database(202), converting the URLs into article codes by using an algorithm(203), printing the news articles with the article codes and distributing the prints(204), and enabling a user to access a service site offering the news article information, input the article code in an input window, and search for the news article related contents over the Internet by using the article code marked at a bottom of the news article.
Patent KR-20010073433-A (KR)
Title: Toilet stool with automatic feces cleaner
Inventor: CWON HYUN OAK
IPC: E03D11/00
Filed: 2000-01-14
Abstract: PURPOSE: A toilet bowl having an automatic excrement cleaner is provided to use a toilet more conveniently, usefully and hygienically. CONSTITUTION: A toilet bowl having an automatic excrement cleaner comprises: a housing space(2) located to the lower part of a water tank(1) to house a wastebasket, a robot arm setting box(2b) and a wastepaper collecting box(2c); a passage space(4) formed in a cover of a toilet bowl(5) for operating a robot arm(3); and an artificial intelligence sensor and an automatic control system formed on the surrounding wall or a water tank, etc.
Patent KR-20010073642-A (KR)
Inventor: JUNG HAN SIN
IPC: C09D11/16
Filed: 2000-01-19
Abstract: PURPOSE: An ink for writing instrument is provided which is appropriate for a new type of writing instruments with less tackiness, thereby enabling drawing a picture composed of dots and lines or drawing specific figures by adding a less tackiness material to an ink composition consisting solvent, coloring agent and other additives. CONSTITUTION: The ink for writing instrument is manufactured by adding a less tackiness providing material to an ink composition consisting solvent, coloring agent and other additives, wherein the less tackiness providing material comprises polyethylene oxide, wherein a structural formula of the polyethylene oxide is represented as HO-(CH2CH2O)n-CH2CH2OH, wherein n is in the range of 400 to 1,000,000, wherein an addition amount of the less tackiness providing material 0.01 to 20 wt.% of the ink composition, and wherein one or more materials selected from oil-soluble dye soluble to the solvent, dye for ethanol, dye or pigment stably dispersed as fine particles in fluorescent dye or ink composition, metal powder, mica powder, fluorescent dye, luminescent pigment and aromatic material are added to the solvent as the coloring agent or other additives.
Patent KR-20010077285-A (KR)
Title: Mobile station with drawer type cover
Inventor: KIM MIN SU
IPC: H04B1/38
Filed: 2000-02-01
Abstract: PURPOSE: A drawer type cellular phone is provided to improve receiving sensibility by automatically withdrawing an antenna according to a drawer cover when opening the drawer cover and enhance the receiving sensibility by withdrawing only the antenna in case that the cellular phone is used when closing the drawer cover. CONSTITUTION: A body(10) has a microphone(M) and a button unit. A drawer cover(20) is installed in the body(10) to be capable of vertical movement by a slide type and selectively switches the button unit. An antenna(30) is variably connected with tuner terminals(41,42) connected with the body, and is interlocked with the drawer cover(20). An antenna binding unit binds the antenna(30) so that the antenna(30) is interlocked when switching the drawer cover(20). The antenna binding unit has an outer bushing(50) fixedly installed in an antenna hole of the drawer cover(20) and an inner bushing(52) fixedly combined with an inner surface of the outer bushing(50) for moving the antenna(30).
Patent KR-20010006640-A (KR)
Title: Offset control circuit and offset control method
Inventor: OGURA YOICHI
IPC: G11B5/02
Filed: 2000-02-16
Abstract: PURPOSE: To perform the DC offset control accurately at a high speed for a reproduced signal having nonlinearity. CONSTITUTION: When the reproduced signal of recording data of DC free code is provided with nonlinearity, the reproduced signal is sampled by an analog/ digital converter 2 after the equalization is made by a waveform equalizing means 1. The sampled data are binarized and the offset amount is detected by making the good use of the special feature of the DC free code, then a reference level of the analog/digital converter 2 is operated so that the output of a 1st integrator 5 becomes zero. After that, the output of a level shift circuit 6 is inputted to a 2nd integrator 7, and the level shift amount is adjusted so that this output becomes zero to keep the convergent value. After this learning, the DC offset control is performed accurately at a high speed by operating the reference level so that the output of the 2nd integrator 7 becomes zero with the use of the level shift amount being kept.
Patent KR-20010086567-A (KR)
Title: Purification of the Platinum group
Inventor: CHOI CHEOL HO
IPC: C22B11/00
Filed: 2000-03-03
Abstract: PURPOSE: A method for refining high purity platinum group metals is provided to separately refine platinum or palladium into a high purity in a shortened process from platinum group metals which are chemically, physically or electrochemically first recovered from waste catalysts of automobile, waste chemical catalysts, and metal scraps. CONSTITUTION: In a method for refining platinum group metals in which platinum group metals are separated from non-metals by sequentially precipitating platinum group metals using amine based, phosphine based or ammonium chloride complex forming agent after precipitating and separating palladium metal using oxime based, amine based, or phosphine based complex forming agent as a complex forming agent, the method for refining high purity platinum group metals comprises the process of using a precipitating agent after adding an oxidizing agent or a reducing agent corresponding to 5 to 10 times of equivalent of platinum group metals to a mixed solution of the platinum group metals, wherein the phosphine based complex forming agent is triphenylphosphine, the complex forming agent is used in an equivalent ratio corresponding to 2 to 5 times of the platinum group metals, the oxidizing agent is selected from NaClO3, KBr3, KIO3, NaNO2, or (NH4)2S2O8, and the reducing agent is selected from KBr, KI or NaI.
Patent KR-20010087729-A (KR)
Title: Formulation of peptide-mineral complex having a biological activity and the process thereof
Inventor: CHOE YUN SEOK
IPC: A61K36/06
Filed: 2000-03-08
Abstract: PURPOSE: A process for preparing a physiologically active peptide formulation having a mineral complex is provided. Whereby, the formulation can supply a great variety of minerals necessary for the human body to a living body in an environment friendly state without adverse reaction. CONSTITUTION: This peptide formulation is prepared by the process consisting of: increasing food grade yeast with ultrasonic waves under aerobic conditions; continuously supplying nutritive substance as a peptide and carbon supply source to the yeast; supplying a sufficient concentration of mineral to form a peptide-mineral complex; growing at ordinary temperature until yeat cultivation attains a previously decided scale; and drying the grown yeast.
Patent KR-20010091208-A (KR)
Title: An apparatus for polishing edge parts of continuously cast strands
Inventor: BAEK SEUNG GI
IPC: B24B9/00
Filed: 2000-03-14
Abstract: PURPOSE: An edge part grinder of a continuously cast billet is provided to perform various processes including a post-rolling process of a billet as well as a grinding process of edge parts of the continuously cast billet by grinding the edge parts of the billet promptly with precision. CONSTITUTION: An edge part grinder(1) of a continuously cast billet consists of a surrounding assembly(20) surrounding the outside of a continuously cast billet variably, and plural grinding units(50) mounted inside the surrounding assembly to automatically remove a part of edge parts of the billet through direct contact with the billet. The continuously cast billet has thickness of 230mm, width of 820-2000mm and length of 5500-12000mm. The edge parts of the billet have various faults including cracks, pinholes and blow. When the billet is introduced into a first and a second surrounding member(30,40) of the surrounding assembly, a hydraulic motor(52) of the grinding unit is driven. A grinding roll(54) is closely adhered to the corner parts of the billet and driven. Therefore, the grinding roll grinds the edge parts of the billet, exactly the upper and the lower corner parts of the edge parts lengthwise automatically.
Patent KR-20010093583-A (KR)
Title: Method For Providing Corse Attack Classified By Golf Corse According To Handicap Using Internet
Inventor: YOO HYEON SU
IPC: G06Q50/10
Filed: 2000-03-29
Abstract: PURPOSE: A method for presenting strategy for capturing golf course according to handicap through the Internet is provided to enable a golfer to capture an optimum course without taking a lesson by supplying the golfer with a strategy for capturing the optimum course according to a handicap through the Internet. CONSTITUTION: A first process(S1) receives a strategy for capturing a course according to a handicap from a pro-golfer, and records the strategy for capturing the course according to the handicap. A second process(S2) confirms the handicap of a golfer who requests the strategy for capturing the course. A third process(S3) supplies the golfer with the strategy for capturing the course according to the handicap through the Internet by using the corresponding handicap information.
Patent KR-20010094370-A (KR)
Title: the network service system with image information and method thereof
Inventor: HAN TAK DON
IPC: H04L9/00
Filed: 2000-03-30
Abstract: PURPOSE: A network system using image information and a method for the same are provided to perform a connection operation to a particular network by encoding network information into a color code and decoding the encoded data. CONSTITUTION: An image is loaded on a memory(S41). A code is extracted from the image by decoding the image(S42). A kind of the code is determined(S43). The kind of the code is a network address or URL address information or index information. A corresponding client service program is driven according to service information and a service is received through a network by using the network address if the kind of the code is the network address or the URL address information(S44 to S50). A real IP/URL address information is searched by using an index search method and the service is received through the network if the kind of the code is the index information(S45,S46).
Patent KR-20010094445-A (KR)
Title: Semiconductor electric condensor microphone assembly
Inventor: KIM SANG SUN
IPC: H04R17/00
Filed: 2000-03-30
Abstract: PURPOSE: A semiconductor electric condenser microphone assembly is provided to reduce the number of components by installing a semiconductor chip on a printed circuit board. CONSTITUTION: A vibration plate(20) is vibrated by a sound wave. An electric layer(14) is located at a predetermined distance from the vibration plate(20). A semiconductor chip(12) is connected with the electric layer(14) in order to increase a change of capacitance of a condenser by vibration of the vibration plate(20). An FET circuit is patterned in an inside of the semiconductor chip(12) in order to perform an impedance transform. The semiconductor chip(12) is installed on an upper portion of a printed circuit board(10). The electric layer(14) is formed on a bottom face of the printed circuit board(10) by using an electric plating method. A power electrode(12a) and an output electrode(12b) of the FET circuit are formed on the upper portion of the printed circuit board(10). A gate electrode(12c) is connected electrically with the electric layer(14). A plating layer(16) is formed around an edge of the bottom face of the printed circuit board(10). An interval(18) is formed between the plating layer(16) and the electric layer(14). A spacer ring(22) is formed around an edge of a bottom face of the vibration plate(20). The printed circuit board(10) and the vibration plate(20) are fixed by a case(30).