WO2015194895A1 - Antenne à basse fréquence, son procédé de fabrication et système d'entrée sans touches l'utilisant - Google Patents

Antenne à basse fréquence, son procédé de fabrication et système d'entrée sans touches l'utilisant Download PDF

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Publication number
WO2015194895A1
WO2015194895A1 PCT/KR2015/006214 KR2015006214W WO2015194895A1 WO 2015194895 A1 WO2015194895 A1 WO 2015194895A1 KR 2015006214 W KR2015006214 W KR 2015006214W WO 2015194895 A1 WO2015194895 A1 WO 2015194895A1
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WO
WIPO (PCT)
Prior art keywords
antenna
laminated
ribbon sheet
laminated ribbon
sheet
Prior art date
Application number
PCT/KR2015/006214
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English (en)
Korean (ko)
Inventor
이춘걸
Original Assignee
주식회사 아모그린텍
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Publication date
Application filed by 주식회사 아모그린텍 filed Critical 주식회사 아모그린텍
Publication of WO2015194895A1 publication Critical patent/WO2015194895A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set

Definitions

  • the present invention relates to a low frequency antenna and a keyless entry system using the same, and more particularly, to fabricate an antenna core by a non-impregnation process using a synthetic resin case, the structure may be simple and the manufacturing process may be simplified.
  • the antenna core or antenna is used as a transmitting antenna for generating a magnetic field.
  • the antenna generally operates in a resonant circuit, which is tuned by adapting the series capacitance and / or series resistance to the impedance of the antenna layout at the desired transmission frequency.
  • the transmit antenna can be fabricated using a ferrite core as magnetic core. Thanks to the high isotropic volume resistivity of this magnetic material, good quality and low hysteresis losses have already been achieved without special further measurements.
  • the space for accommodating the antenna installed in the vehicle to build a keyless entry system requires an antenna that can define, bend or bend the section of the antenna.
  • Antennas with ferrite cores are not suitable due to lack of elasticity and low saturation induction.
  • the magnetic core formed by stacking a plurality of amorphous ribbon sheets has a structure inferior in flexibility because it is integrated by impregnating an epoxy resin adhesive.
  • the impregnated antenna core is solidified by the impregnation process, the loss is high (Q value decrease), and there is a problem that the process cost increases according to the impregnation process.
  • Patent Document 1 discloses a flexible antenna core composed of a laminate composed of a plurality of layers of an amorphous alloy, and additionally, a bundle in which foil insulation is inserted between layers is described. Moreover, the possibility that the insulation of each of the amorphous magnetic members is made by an oxide layer or another layer that can be produced by chemical treatment of the magnetic members is also described.
  • antennas that can bend large, particularly antennas with long, bulky windings
  • the internal structures of known amorphous and nanocrystalline alloys and in particular antenna cores are only suitable for very limited applications.
  • ferrite cores that have been difficult to bend have been used for a long time.
  • Patent Document 2 discloses an amorphous material having a low magnetostriction value so that deformation of the antenna can be ensured without greatly changing the magnetic properties of the antenna during deformation. Or winding a continuous strip made of nanocrystalline alloy in the form of a toroidal, then cutting one side to form a bar, and the soft magnetic member is electrically separated by an insulating foil and taped with adhesive tape. An antenna structure in which a coil is wound around an antenna core is proposed.
  • the said patent document 2 is equipped with the reinforcement sheet which consists of synthetic resins, respectively, up and down in order to stabilize the laminated body which laminated
  • Patent Document 3 a continuous strip made of a soft magnetic alloy having an amorphous or nanocrystalline structure is wound in a toroidal shape, and then pressed flat to prepare an antenna core. Disclosed is a structure formed by winding a coil.
  • Patent Document 3 described above has a problem that it is difficult to implement a thin film core because generally amorphous metal is a very hard material even when the continuous strip is wound flat in a toroidal shape.
  • the present invention has been proposed to solve the above problems of the prior art, the object of which is to provide a simple structure and simple manufacturing process while having the flexibility to manufacture the antenna core by a non-impregnation process using a synthetic resin case
  • the present invention provides a low frequency (LF) antenna, a method for manufacturing the same, and a keyless entry system using the same.
  • LF low frequency
  • Another object of the present invention is to provide an LF antenna that can improve the Q (Quality) value and increase the recognition distance, and a keyless entry system using the same as the core loss is reduced as the antenna core is manufactured by the impregnation process using a synthetic resin case. There is.
  • Another object of the present invention is to package a laminated amorphous ribbon sheet using a synthetic resin case as an insulating material, there is no need for a separate bobbin required for coil winding, LF antenna that can reduce the manufacturing process and manufacturing cost, and its manufacturing method and It is to provide a keyless entry system using the same.
  • the LF antenna according to the present invention is a LF antenna including a bar-shaped antenna core and a coil wound around the outer periphery of the antenna core, the antenna core is stacked to form an inductor core A plurality of laminated ribbon sheets; And a flexible case made of a synthetic resin and accommodating and sealing the plurality of laminated ribbon sheets therein.
  • the plurality of laminated ribbon sheets may be made of a soft magnetic alloy having an amorphous or nanocrystalline structure, and may be processed by forming a ribbon or strip into a sheet having a predetermined length.
  • the magnetic field or the magnetic field heat treatment for 30 minutes to 6 hours at a temperature range of 300 ° C. to 600 ° C. (vertical or horizontal in a maximum 4,000 Gauss range).
  • the magnetic field or the magnetic field heat treatment for 30 minutes to 6 hours at a temperature range of 300 ° C. to 700 ° C. (vertical or vertical in the range of 4,000 Gauss Max) Horizontal).
  • the plurality of laminated ribbon sheets may be divided into fine pieces to increase flexibility and improve Q (Quality) values.
  • the plurality of laminated ribbon sheets are composed of a plurality of unit laminated ribbons, each of the plurality of unit laminated ribbons is a protective sheet is attached to the upper and lower surfaces and the double-sided tape is inserted between the laminated ribbon sheets are laminated
  • the ribbon sheet can be used divided into fine pieces.
  • the case is made of a heat shrink tube, and preferably, the heat shrink tube may be made of a polyolefin resin.
  • the heat shrink tube may be sealed by pressing both ends thereof, and a center portion between both ends thereof may be in close contact with the outer circumference of the plurality of laminated ribbon sheets.
  • the case may be made of a rectangular box made of engineering plastics.
  • the rectangular box is a rectangular barrel that accommodates the laminated ribbon sheet;
  • one side of the cover integrally extending on one side of the rectangular tube to cover the rectangular tube.
  • the three sides of the cover may be formed by sealing by passing through the rectangular by ultrasonic welding.
  • Keyless entry system comprises a transmitter; And a keyless entry system including a receiver, wherein the antenna is embedded in the transmitter and / or the receiver.
  • Method of manufacturing an LF antenna comprises the steps of preparing a continuous ribbon made of a soft magnetic alloy having an amorphous or nanocrystalline structure; Stacking a plurality of ribbon sheets obtained by slitting and cutting the ribbon to a desired width and length to obtain a laminated ribbon sheet; Heat-treating the laminated ribbon sheet; Forming an antenna core by accommodating the laminated ribbon sheet subjected to heat treatment in a synthetic resin case and sealing the result; And winding a coil around the periphery of the antenna core to form an LF antenna.
  • the step of receiving the heat-treated laminated ribbon sheet in a synthetic resin case and sealing to form an antenna core, by the injection molding using engineering plastic, one side of the cover is integrally folded to one side of the rectangular tube can be folded rectangular Manufacturing a box; And accommodating the laminated ribbon sheet in the rectangular box and bonding three sides of the lid overlapping the rectangular box by ultrasonic welding to seal the laminated ribbon sheet.
  • the method of manufacturing an LF antenna according to the present invention may further include the step of separating the ribbon sheet into fine pieces by heat treatment of the laminated ribbon sheet and by a flake treatment.
  • the structure may be simple and the manufacturing process may be simplified.
  • the core loss may be small, thereby improving the Q value and the recognition distance.
  • the laminated amorphous ribbon sheet is packaged using a synthetic resin case which is an insulating material, so that a separate bobbin required for coil winding is not required, thereby reducing manufacturing process and manufacturing cost.
  • FIG. 1 is a perspective view showing an LF antenna according to an embodiment of the present invention
  • Figure 2a is a cross-sectional view taken along the line X-X 'of FIG.
  • Figure 2b is a cross-sectional view of the LF antenna having a modified appearance according to an embodiment of the present invention
  • FIG. 3 is a flow chart illustrating a method of manufacturing an LF antenna according to the present invention.
  • 4A and 4B are schematic cross-sectional views of a case and an assembled state showing an antenna core for an LF antenna according to a second embodiment of the present invention, respectively.
  • FIG. 1 is a perspective view showing an LF antenna according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along the line X-X 'of Figure 1
  • Figure 2b has a modified appearance according to an embodiment of the present invention Sectional view of the LF antenna.
  • the LF antenna 1 according to an exemplary embodiment of the present invention includes a bar core shaped antenna core 10 and a coil 20 wound around the antenna core 10. have.
  • the antenna core 10 includes a case 11 made of a synthetic resin and a plurality of laminated ribbon sheets 13 stacked to form a bar inductor core inside the case 11.
  • the case 11 may be manufactured using a heat shrinkable tube having a rectangular, ellipse or circular cross section.
  • a heat shrink tube may use a polyolefin resin, and generally has a shrinkage ratio of 2: 1, and a use temperature ranges from -55 to 125 ° C.
  • the heat-shrinkable tube may use other tubes in which shrinkage occurs due to heat treatment in addition to polyolefin.
  • the case 11 may be molded into the structure shown in FIG. 2A or 2B according to the heat treatment and the both end treatment forms of the heat shrink tube after inserting a plurality of laminated ribbon sheets 13 stacked inside the heat shrink tube. That is, in the state where the plurality of laminated ribbon sheets 13 are inserted into the heat-shrink tube, the tube is shrunk by heat treatment first to closely adhere to the plurality of laminated ribbon sheet 13 blocks, and then the both ends of the tubes are compressed to seal. Pressing on one side at the same time to obtain the structure shown in Figure 2a, and pressing both sides at the same time forming the symmetrical structure shown in Figure 2b.
  • both ends 11a and 11b of the case 11 formed by pressing both ends of the heat shrink tube may have a flange wider than the width of the area where the coil 20 is wound so as to define an area where the coil 20 is wound. It is also possible to be molded to have.
  • the plurality of laminated ribbon sheets 13 laminated to form the inductor core are made of a soft magnetic alloy having an amorphous or nanocrystalline structure, and the soft magnetic alloy is, for example, subjected to quench solidification (RSP) by melt spinning.
  • RSP quench solidification
  • the laminated ribbon sheet 13 may form a bulk inductor core by stacking 100 individual ribbon sheets having a length of 80 mm and a width of 10 to 12 mm.
  • the amorphous ribbon used in the laminated ribbon sheet 13 may be a ribbon of a thin plate made of a soft magnetic alloy having an amorphous or nanocrystalline structure.
  • an Fe-based or Co-based amorphous alloy may be used, and considering the material cost, it is preferable to use an Fe-based amorphous alloy.
  • the Fe-based amorphous alloy may be made of, for example, a Fe-Si-B alloy or a Fe-Si-B-Co-based alloy, and the Co-based amorphous alloy may be Co-Si-B-Fe, Co-Fe-Ni- Si-B and Co-Fe-Cr-Si-B alloys may be used.
  • a Fe-Si-B-Cu-Nb alloy may be used as the soft magnetic alloy having the nanocrystal structure.
  • the coil 20 wound around the outer circumference of the antenna core 10 may use an enamel wire having enamel insulation on the outside of the copper wire, and may also use a stranded wire, an electric wire, a cable, or the like.
  • a capacitor (not shown) is connected in parallel to the two output terminals 20a and 20b drawn out from the coil 20 so as to form a resonant circuit.
  • lamination when laminating a plurality of laminated ribbon sheets 13, lamination is performed without inserting any insulating foil, forming an oxide film, or impregnating an adhesive resin between the ribbon sheets.
  • the antenna core 10 which is composed of a plurality of laminated ribbon sheets 13 in which a heat shrink tube is squeezed on the outer circumference, may be easily deformed without a great change in magnetic properties of the antenna, even if deformation, such as bending or twisting, is applied. It has flexibility.
  • an amorphous ribbon or strip made of a soft magnetic alloy having an amorphous or nanocrystalline structure is produced by quench solidification (RSP) by melt spinning and obtained continuously.
  • the amorphous ribbon is first slitting to a desired width using a slitting machine (not shown) to facilitate post-treatment after heat treatment (S11), and then slitting to a desired constant width and continuously
  • the supplied amorphous ribbon is cut to a predetermined predetermined length using a cutting machine (not shown), and a plurality of ribbon sheets having a predetermined length are sequentially stacked on the tray (S12).
  • the laminated ribbon sheets 13 laminated on each tray can be laminated by a predetermined number of sheets by counting by a counter (not shown).
  • the laminated ribbon sheet 13 laminated by a predetermined number of sheets is then sandwiched between a pair of fixing jigs, sandwiched, and sandwiched, and fastened to each end of the pair of fixing jigs by bolts and nuts.
  • the laminated ribbon sheet 13 is fixed. Fixing the laminated ribbon sheet 13 using a pair of fixing jig is for facilitating handling of the laminated ribbon sheet 13 during and after the heat treatment.
  • Laminated ribbon sheet 13 is assembled using a pair of fixing jig is heat-treated in a heat treatment furnace (S13).
  • the laminated ribbon sheet 13 is made of a soft magnetic alloy having an amorphous structure, a temperature range of 300 ° C. to 600 ° C. to adjust soft magnetic properties such as permeability, slope of BH loop, magnetostriction value, and Q value.
  • Magnetic field or magnetic field heat treatment for 30 minutes to 6 hours at, wherein the magnetic field heat treatment is performed in the vertical or horizontal direction in the range up to 4,000 Gauss.
  • the slope of the B-H loop is changed to increase the linearity of the inductance value according to the frequency change, thereby inducing a high Q value.
  • the heat treatment atmosphere does not need to be made in the atmosphere furnace even if the Fe content is high, since the oxidation is made in a temperature range in which oxidation does not occur, and the heat treatment may be performed in the air.
  • the heat treatment is performed in an oxidizing atmosphere or a nitrogen atmosphere, the permeability of the amorphous ribbon sheet is not substantially different under the same temperature conditions.
  • the heat treatment temperature is less than 300 °C exhibits a high permeability higher than the desired permeability, there is a problem that takes a long heat treatment time, and if the heat treatment temperature exceeds 600 °C there is a problem that the permeability is significantly lowered by overheating treatment does not represent the desired permeability .
  • the heat treatment temperature is low, the treatment time is long.
  • the heat treatment temperature is high, the treatment time is shortened.
  • the laminated ribbon sheet 13 when the laminated ribbon sheet 13 is made of a soft magnetic alloy having a nano crystal structure, for example, Fe-Si-B-Cu-Nb alloy, it forms 300 nanocrystals to control soft magnetic properties.
  • Magnetic field or magnetic field heat treatment (vertical or horizontal in the range of up to 4,000 Gauss) may be performed for 30 minutes to 6 hours in the temperature range of 700 ° C.
  • the magnetic field heat treatment is performed to change the slope of the B-H loop to increase the linearity of the inductance value according to the frequency change, and to induce a high Q value.
  • the heat treatment atmosphere is more than 70at% of the Fe content, so if the heat treatment is performed in the air, the oxidation is not preferred in terms of visual, it is preferably made in a nitrogen atmosphere. However, even if the heat treatment is performed in an oxidizing atmosphere, the magnetic permeability of the sheet is not substantially different under the same temperature conditions.
  • the heat treatment temperature is less than 300 °C nanocrystals are not sufficiently generated, the desired permeability is not obtained and the heat treatment time is long, there is a problem that the heat permeability is significantly lowered by overheating if it exceeds 700 °C there is a problem.
  • the treatment time is long, and conversely, if the heat treatment temperature is high, the treatment time is preferably shortened.
  • the laminated ribbon sheet 13 subjected to the heat treatment may be separated into fine pieces through a flake treatment process to increase flexibility and further improve the Q (quality) value.
  • each of the plurality of unit laminated ribbon sheet is a protective sheet is attached to the upper and lower surfaces and the double-sided tape is inserted between the laminated ribbon sheet
  • the sheet is stacked and the ribbon sheet may have a structure divided into fine pieces.
  • the plurality of laminated ribbon sheets 13 are difficult to flake at the same time, for example, two to three sheets of laminated ribbon sheets are formed, and the single-sided tape is attached as a protective sheet to the exposed both sides, and the ribbon sheet
  • the antenna core 10 may be configured by performing a flake processing on the ribbon sheet by passing the flake processing apparatus in a state where a double-sided tape is attached and laminated therebetween, and stacking a plurality of flake-treated unit laminated ribbon sheets. .
  • the laminated ribbon sheet 13 subjected to the heat treatment and the flake treatment is counted by a predetermined number of times to generate a magnetic field suitable for the antenna core 10 for the LF antenna, assembled to the heat shrink tube (S14), and heat is applied to the heat shrink tube.
  • the tube is fixed to the laminated ribbon sheet 13 block as the tube is contracted (S15).
  • the antenna core 10 shown in FIG. 2A is obtained (S16).
  • the obtained antenna core 10 is subjected to quality inspection to confirm whether the inductor core has a predetermined inductance L, resistance R and Q (quality) values.
  • the LF antenna 1 is obtained.
  • the laminated ribbon sheet 13 is assembled to a heat-shrink tube to form the case 11 by heat treatment.
  • the second embodiment shown in FIGS. 4A and 4B has a rectangular box shape. Can be assembled using the case (110).
  • the case 110 may be manufactured by injection molding using, for example, engineering plastics such as PA66, PP, PET, PC, PBT, LCP, and one side of the cover 113 may have a rectangular tube 111. It is connected to one side of the integrally made of a foldable structure.
  • engineering plastics such as PA66, PP, PET, PC, PBT, LCP
  • the above embodiment proposes a rectangular box in which the cover 113 is integrally connected to one side of the rectangular barrel 111 for convenience of work, but the cover 113 is a structure separated from the rectangular barrel 111. Can be.
  • the antenna core 10a seals the laminated ribbon sheet 13 in the rectangular tube 111 and bonds the three sides of the lid 113 overlapping the rectangular tube 111 by ultrasonic welding to seal them. It can be produced in a structure forming a.
  • the rectangular cylinder 111 and the cover 113 may be manufactured, for example, to a thickness of 0.4 ⁇ 0.6mm.
  • the antenna cores 10 and 10a according to the present invention package the laminated ribbon sheet 13 having flexibility inside the flexible cases 11 and 110 in a sealed state, the antenna cores 10 and 10a have sufficient flexibility as a whole. As a result, the LF antenna 1 can be easily installed even in a complex structure inside the vehicle.
  • the integrated ribbon sheet 13 itself does not require an integration process such as binder impregnation.
  • the cases 11 and 110 having excellent insulation are surrounded on the outer side of the laminated ribbon sheet 13, it is not necessary to form a separate insulating bobbin, so that the manufacturing process can be shortened and the cost can be reduced.
  • LF low frequency
  • the LF antenna 1 is mounted inside the handle 30 of the car door or installed in a bumper of a car interior, and is installed in a key fob embedded in a smart key carried by a user. .
  • the key fob mounted on the user's smart key includes a low frequency (LF) receiver including a LF antenna (1), a 3D active immobilizer and a microcontroller.
  • LF low frequency
  • a transceiver including an antenna 1, an immobilizer reader, a microcontroller, a door handle interface, and an antenna diagnostic apparatus are provided.
  • a low frequency (LF) communication of 22 kHz band is performed between a key fob mounted on a user's smart key and a control part mounted on a vehicle, so that the recognition distance is 1 m. It is easy to secure the abnormality.
  • LF low frequency
  • the LF antenna 1 according to the present invention is used, the recognition distance is long. It is possible to use a number of antennas.
  • the present invention can be applied to a low frequency (LF) antenna installed in a handle of a car door, a bumper in a car interior, and a key fob embedded in a smart key to implement a low frequency keyless entry system.
  • LF low frequency

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Abstract

La présente invention porte sur une antenne à BF qui est flexible, comporte une structure simple, et présente un processus de fabrication simple consistant à fabriquer un noyau d'antenne selon un processus non imprégné au moyen d'une enceinte de résine ; son procédé de fabrication ; et un système d'entrée sans touches l'utilisant. L'antenne à BF selon la présente invention comprend un noyau d'antenne en forme de barre et une bobine enroulée autour de la circonférence extérieure du noyau d'antenne, le noyau d'antenne comprenant : une pluralité de feuilles en rubans d'empilement empilées pour former un noyau d'inductance ; et une enceinte flexible constituée de résine synthétique et contenant et scellant la pluralité de feuilles en rubans d'empilement.
PCT/KR2015/006214 2014-06-19 2015-06-18 Antenne à basse fréquence, son procédé de fabrication et système d'entrée sans touches l'utilisant WO2015194895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0074784 2014-06-19
KR20140074784 2014-06-19

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WO2015194895A1 true WO2015194895A1 (fr) 2015-12-23

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WO (1) WO2015194895A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111801752A (zh) * 2018-03-02 2020-10-20 Tdk株式会社 磁性芯及其制造方法和线圈部件

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KR101813386B1 (ko) 2016-06-21 2017-12-28 삼성전기주식회사 자성체를 포함하는 무선 통신 안테나
KR101696856B1 (ko) 2016-09-21 2017-01-17 비젼디지텍(주) 자동차용 lf 안테나 및 그 제조방법
EP3474378B1 (fr) * 2017-10-23 2021-03-17 Premo, S.A. Antenne pour communication à basse fréquence dans un environnement de véhicule et système de communication basse fréquence
KR102148572B1 (ko) * 2018-12-03 2020-08-27 최유경 무선 충전기용 자기장 차폐시트 및 그의 제조방법
KR102254974B1 (ko) 2021-01-25 2021-05-24 인팩일렉스 주식회사 자동차 스마트키용 저주파 안테나

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JP2007251041A (ja) * 2006-03-17 2007-09-27 Toshiba Corp インダクタンス素子とそれを用いたアンテナ素子および通信型電子機器
JP2011001816A (ja) * 2010-08-04 2011-01-06 Aisin Seiki Co Ltd バーアンテナをもつ自動車用ドアハンドル
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KR20130072181A (ko) * 2011-12-21 2013-07-01 주식회사 아모센스 무선 충전기용 자기장 차폐시트 및 그의 제조방법과 이를 이용한 무선충전기용 수신장치

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Publication number Priority date Publication date Assignee Title
CN111801752A (zh) * 2018-03-02 2020-10-20 Tdk株式会社 磁性芯及其制造方法和线圈部件

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