【经验】如何解决指纹锁ESD按IEC/EN61000-4-2标准测试静电后死机的问题？

时间： 2023-07-26 来源：ASIM 微信公众号

技术问答

门禁管理是现代安全防范系统的重要组成部分，随着国内对门禁系统的安全性、先进性和稳定性要求的提高，迫切需要一种高性能的门禁系统，现在比较常用门禁系统主要有生物识别(指纹、掌形、虹膜等)和以射频卡系统为代表的系统，虽然传统的以射频卡为代表的门禁系统能取到一些作用，但从本质上来说，是检验人持有的“物”，而不是验证其本人，只要“物”的有效性得到确认，则持有该“物”的人就被认为是合法者。

本次来我司整改产品指纹锁，外壳为塑料外露UBS金属外壳带显示屏。按IEC/EN61000-4-2标准测试静电后死机，以下为测试数据：

一、整改前数据：

整改方案：

1.针对ESD测试会打坏DCDC IC的情况，我们在VBAT上对地并联ESD(ESD7D200TR),并且对地并一些小电容(10NF,1NF)，如下图黄色箭头处;并且串联磁珠(CVB1608E102T)，如下图红圈处：

2.针对复位现象，在RESET复位信号上对地并联ESD(ESD5D150TA)，如下图红色箭头处，并且在靠近IC引脚这边串联磁珠(CVB1005C182T),建议再对地加一些小电容(1NF,100PF)。

3.指纹采集的信号线上对地并联ESD器件(ESD5D150TA),并且留好磁珠(CVB1005C182T)的位置.USB充电的信号和电源上对地并联ESD(ESD5D150TA)，ESD往往容易干扰信号，所以信号线也要做防护。

4.PCB LAYOUT的时候，需要注意信号回路，信号回路面积越大，ESD越弱。PCB板之间地的连接尽量更宽。PCB板之间用连接线连接的时候需要注意ESD防护，最好留好ESD(需要注意结电容以及启动电压，结电容对信号要无影响，启动电压要大于线路的正常工作电压)和磁珠(磁珠的电流要大于正常电路的工作电流)的位置。

二、整改后数据

深圳市阿赛姆电子有限公司位于深圳市银星高科技产业园，是一家集电子保护元器件自主研发、生产、销售及EMC设计、EMC技术支持的高科技企业。公司主营产品包括TVS ESD、滤波器、磁珠、等保护器件，在通信、计算机/服务器、安防、军用产品、汽车电子、家电、工业控制、数码消费等领域得到广泛应用。

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本文由玉鹤甘茗转载自ASIM 微信公众号，原文标题为:指纹锁ESD整改，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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SMA04J85B,SODA75V-SH,ESD0524CR,ESD4V5J901TAP,SM8S66J22V,ESD5D080TA,SM8S66J10V,SODA130B-SH,SMA04J120B,ESD7E100TA,ESD30A150TA,SMA04J85V,ESD12A005TA,SODA45B-SH,SMA04J130V,SMC15J21V,SM8S66J11V,SMC15J33V,SMC15J21B,SM8S66J24V,SMC15J33B,SM8S66J36V,ESD5D003TA,ESD48A150TA,SODA7.5V-SH,CMF2N102WIT,SODA13B-SH,SODA28V-SH,SODA170B-SH,SMC15J30V,SODA30B-SH,SM8S66J12V,CMF2K272WIT,SM8S66J13V,SMA04J110B,SMB06J09V,SODA12V-SH,SMC15J30B,CMF4532WA601MQT,SODA7.0B-SH,SMA04J120V,ESD5D003SA,ESD5M030TR,ESD5D200TA,SMA04J60B,SM8S66J26V,ESD5A121TA,SODA36V-SH,SODA160V-SH,SM8S66J14V,ESD3V3E150TA,CMF2G102WIT,SMA04J60V,SODA22B-SH,ESD8D100TA,SODA60B-SH,ESD5B010TA,SM8S66J30V,SMB06J90V,SMB06J100V,ESD24D250TA,SMA04J188B,ESD15J501TRP,CMF2G101WIT,SODA85B-SH,SODA51V-SH,SODA90V-SH,SODA75B-SH,SMB06J100B,SODA13V-SH,SMA04J30B,SMA04J54B,SMA04J78B,ESD33A200TA,SMA04J150V,SODA6.0V-SH,SM8S66J43V,ESD5R005TA,SMA04J78V,ESD15H451TR,SODA14B-SH,CMF2G251WIT,SODA120V-SH,SMA04J30V,SMA04J54V,SMA04J51B,SMA04J75B,ESD2D005LA,SM8S66J20V,SMB06J110V,SODA160B-SH,SMA04J130B,SODA20V-SH,SODA9.0V-SH,SMA04J51V,SODA100B-SH,SMA04J75V,ESD5D101UP,SMA04J40B,SODA18V-SH,SODA70B-SH,SMA04J64B,ESD15A350TA,SMB06J110B,ESD4V2D015TA,SMA04J188V,SMB06J90B,SM8S66J33V,SODA36B-SH,ESD5E003TA,SMA04J40V,SMA04J64V,SODA51B-SH,SODA43B-SH,SMA04J33B,SMA04J45B,SODA7.0V-SH,ESD18D250TA,ESD5P065TR,SMB06J15B,SMB06J120V,CMF2J601WIT,SMA04J33V,SMA04J45V,ESD24R300TA,SODA85V-SH,CMF2G501WIT,SODA170V-SH,SMB06J15V,SMB06J120B,SMA04J10B,SODA15B-SH,SODA30V-SH,SMA04J22B,SMA04J58B,SMB06J16B,SMB06J28B,SODA58B-SH,SODA7.5B-SH,ESD7D100TA,ESD15A005TA,SMA04J22V,SMA04J58V,CMF2N551WIT,ESD05SR008TR,ESD5A005TA,SODA14V-SH,SMB06J16V,SMB06J28V,SMA04J10V,SMA04J43B,SODA45V-SH,SODA70V-SH,SM8S66J40V,SODA8.5B-SH,SMB06J130V,SODA100V-SH,SMB06J13B,SMB06J13V,ESD3V3A350TA,ESD18B250TR,ESD18J801TRP,SMA04J43V,SMA04J20B,CMF0605UD350MFR,CMF0605DH900MFR,SMB06J14B,SMB06J26B,SMB06J130B,SMA04J20V,SMB06J14V,SMB06J26V,CMF2I102WIT,ESD3E003LA,SODA18B-SH,SMA04J13B,SODA58V-SH,ESD5D201BP,SODA15V-SH,SMB06J188V,SODA130V-SH,SMA04J13V,SMA04J100B,CMF0605UD120MFR,SODA16B-SH,SMB06J08B,SMA04J26B,SMB06J07V,SODA24B-SH,SMB06J188B,ESD3V3D250TA,SODA43V-SH,SMA04J110V,SMA04J14B,SMA04J14V,CMF2012WA670MQT,CMF2L102WIT,SMA04J26V,SMB06J09B,ESD5B150TA,SMA04J15B,ESD36D200TA,SMB06J08V,ESD15R450TR,CMF2F501WIT,SMA04J11B,SODA150V-SH,SMB06J05B,SMB06J17B,SMB06J150V,SMA04J11V,CMF2K102WIT,SMB06J18B,SMA04J48B,SMB06J05V,SMB06J17V,ESD24A005TA,ESD30J501TR-3,SMA04J12B,SMA04J100V,SMA04J24B,CMF2H301WIT,SMA04J36B,SODA22V-SH,SMB06J06B,ESD5D350TA,SMA04J12V,SMA04J24V,SMA04J36V,SMA04J48V,SMB06J07B,SMB06J18V,SMB06J06V,SMB06J150B,ESD6V7J202TUP,SODA8.0B-SH,SODA17B-SH,SMB06J160V,CMF2I301WIT,SODA24V-SH,SMA04J7V5B,SMB06J43B,SMB06J43V,ESD36A150TA,SMA04J05V,SMA04J17V,SMA04J7V5V,SMA04J06B,SODA16V-SH,SMA04J18B,SODA33B-SH,SMB06J20B,ESD3RG00AE,ESD8A005TA,CMF2012WA900MQT,ESD0524UA,ESD12D450TR,ESD26J701UP,SMB06J20V,SMA04J06V,SMA04J18V,CMF2012DH900MFR,SMA04J07B,SODA150B-SH,SMB06J160B,ESD30H201TR,SMB06J170V,ESD3V3B350TA,ESD24J401TRP,SODA110B-SH,CMF2K701WIT,ESD18A300TA,SMA04J15V,SMA04J16B,SMA04J28B,SODA64V-SH,SMB06J30B,ESD3V3E100SA,SMB06J78B,ESD5D030TA,SMB06J54B,ESD5B005TA,ESD3V3A005TA,SMB06J78V,SMB06J54V,CMF2010DH101MFR,SMB06J30V,SODA5.0V-SH,SMA04J16V,SMA04J28V,CMF3225WA102MQT,SMA04J05B,SMB06J170B,SODA40V-SH,SMA04J17B,SODA6.5V-SH,ESD4V5A401TRP,SODA48B-SH,SODA26B-SH,CMF3216WA222MQT,SODA6.5B-SH,SMA04J09V,ESD3V3D005SA,SMB06J11B,SMB06J11V,SODA17V-SH,ESD15D500TR,CMF2I701WIT,SODA8.5V-SH,SMB06J36B,SMB06J48B,SMB06J12B,SMB06J24B,CMF2F102WIT,ESD5D600TA,SMB06J12V,SMB06J24V,SMB06J36V,SMB06J48V,SODA6.0B-SH,SODA64B-SH,SMC15J18V,SMA04J6V5V,ESD12J551TRP,CMF2N301WIT,SMB06J8V5V,SMC15J19B,ESD5E150TA,SMB06J45B,ESD5H401TR,SMB06J33B,CMF2F251WIT,SMB06J45V,SMB06J33V,SMA04J07V,SMB06J8V5B,CMF4532WA102MQT,CMF1210UD900MFR,SMA04J08B,ESD5D150TA,ESD12D900TR,SODA110V-SH,SMC15J19V,SODA5.0B-SH,SMA04J08V,SMA04J6V5B,SMB06J58B,SODA10B-SH,SODA78V-SH,SMB06J10B,SMB06J22B,CMF2F101WIT,SMB06J10V,SMB06J22V,CMF1210DH900MFR,SODA8.0V-SH,SMA04J09B,SMB06J58V,ESD5E030TA,SMC15J28V,SMB06J70V,ESD5N005TR,ESD5A600TA,SMA04J160B,ESD7D500TR,SMB06J60B,SODA120B-SH,SMC15J18B,SMA04J170V,SMA04J90B,SODA26V-SH,SMB06J7V5V,SMB06J7V5B,CMF2G152WIT,CMF2012WD900MQT,ESD5D005LA,SMC15J26V,SMC15J39B,SODA90B-SH,CMF2F142WIT,SMA04J150B,SMC15J26B,SODA11B-SH,SODA20B-SH,ESD5C150TA,ESD12H401TR,SMC15J15V,SMB06J70B,SMC15J39V,ESD12D101TR,ESD12A150TA,SODA54B-SH,SMA04J160V,SMC15J28B,CMF2012WE900MQT,CMF2I132WIT,ESD3D003LA,SMC15J15B,SODA10V-SH,SODA78B-SH,SMB06J75B,ESD3V3J151TUP,SMB06J51B,ESD12C150TR,SMB06J6V5V,SM8S66J15V,ESD12B550TR,SODA33V-SH,SMB06J75V,SMB06J51V,SMB06J6V5B,ESD5A150TA,CMF2N701WIT,SMB06J64B,ESD24B300TR,SMB06J40B,ESD4V5A301TRP,SODA28B-SH,ESD4V5H401TR,ESD5B025TA,SODA9.0B-SH,SMA04J8V5B,SMA04J70B,SM8S66J16V,ESD7H701TR,SMB06J64V,SM8S66J28V,SMB06J40V,SMA04J8V5V,SMA04J70V,SMB06J85B,SMA04J90V,SMB06J60V,SODA54V-SH,SODA11V-SH,CMF2L701WIT,SMB06J85V,ESD24A250TA,SODA12B-SH,SMA04J170B,SM8S66J17V,SODA60V-SH,SMC15J35V,SODA48V-SH,SODA40B-SH,ESD24D500TR,SMC15J23V,ESD12D080TA,SMC15J23B,SMC15J35B,SM8S66J18V,C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型号- CVB2012E121T,CVB3216E190T,CVB1005C301T,CVB1005E100T,CVB1005E221T,CVB3216E102T,CVB1608C121T,E系列,CVB1608E300T,CVB1608E102T,CVB1608C222T,CVB1608C331T,CVB1608C202T,CVB1005E601T,CVB1005E121T,CVB1005C421T,CVB2012E102T,CVB1005C102T,CVB3216E501T,CVB1608E181T,CVB3216E101T,CVB3216E121T,CVB1005C182T,CVB1608C102T,CVB1608E101T,CVB1608C421T,CVB1608E121T,CVB1005E800T,CVB1005E300T,CVB1005E102T,CVB1005C121T,CVB2012E301T,CVB3216E221T,CVB1608C252T,CVB1608C272T,CVB1608E100T,CVB1608E221T,CVB2012E601T,CVB3216E601T,CVB1608E471T,CVB1608E152T,CVB1608E601T,CVB2012E471T,CVB1005C152T,CVB1005E600T,CVB2012E100T,CVB1005C221T,CVB2012E221T,CVB1005E151T,CVB3216E600T,CVB3216E301T,C系列,CVB1608C471T,CVB1608E301T,CVB1005C601T,CVB2012E600T,CVB1608C221T,CVB1608C152T,CVB1608C601T,CVB1608E600T

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目录- 公司简介和分立器件产品目录 EMC器件設計示意圖半導體ESD 半導體ESD静电管阵列大功率浪湧TVS 场效应管稳压二极管肖特基二极管

型号- AM20DP070T,ESD0524CR,SMA08J18V,AS47VB151T,SM8S66J22V,ESD30J501TRP,SMC15J20V,5KP200B,SMA04J120B,SMC15J20B,5KP51V,AS2V4B151T,5KP200V,SMC15J100V,SODA45B-SH,AM30RN12T,5KP75V,AM40LN70T,SMD30J28V,SMC15J45V,SMC15J100B,SMC15J45B,SM8S66J24V,SMD50J75V,5KP51B,SMD50J51V,5KP75B,AS7V5B151T,ESD24J601TRP,AS39VB151T,AS6V2A201T,SODA28V-SH,SODA170B-SH,5KP30V,5KP54V,5KP78V,AS27VA201T,5KP78B,AS3V3A201T,SMD30J28B,5KP30B,5KP54B,SODA7.0B-SH,SMA04J120V,SMD30J26V,SM8S66J26V,ESD24R1102A,SODA36V-SH,SODA160V-SH,AM100LN15T,AS6V8B151T,AS9V1A201T,SODA60B-SH,ESD5B010TA,SMD50J30B,SMC15J40V,SMC15J64V,SMC15J64B,SMD50J78V,AM30DN058T,SMD50J110V,SMC15J120V,SMD30J26B,SMD50J54V,SMD50J30V,SODA51V-SH,SMC15J40B,SMA04J30B,SMA04J54B,SMA04J78B,AS22VA201T,AS68VB151T,SODA6.0V-SH,SMC15J120B,SMD30J48V,SM8S66J43V,SMA04J78V,SMD30J24V,AS30VA201T,5KP70V,SMA04J30V,SMA04J54V,SMA04J51B,SMA04J75B,ESD2D005LA,SMA04J250V,SM8S66J20V,SMB06J110V,SODA160B-SH,AM100LN12T,SMD30J48B,SMA04J51V,SMD30J24B,SODA100B-SH,SMA04J75V,SODA18V-SH,SODA70B-SH,SMB06J110B,AS18VB151T,SODA36B-SH,SMD30J22V,SMA04J250B,AS8V2B151T,SODA51B-SH,SODA43B-SH,SMA04J33B,SMD30J5.0V,SODA7.0V-SH,AS2V5A201T,ESD18D250TA,SMC15J60V,SMB06J15B,5KP12V,5KP36V,SMA04J33V,5KP12B,SMD30J45V,SMD50J90V,5KP36B,ESD24R300TA,ESD3V3E003LA,SODA170V-SH,SMD50J130V,SMC15J60B,SMB06J15V,SMD30J22B,SMD30J20B,SMA04J10B,SMA04J58B,SMB06J16B,SMD30J5.0B,AM20GN8T,SMC15J85V,5KP11V,AS2V7A201T,AS36VA201T,ESD15A005TA,SMA04J58V,SMD30J20V,ESD5A005TA,SMB06J16V,SMC15J85B,SMD30J45B,5KP11B,SMA04J10V,SMD30J43B,SODA45V-SH,SODA70V-SH,SM8S66J40V,SMB06J130V,SMD30J170V,SODA100V-SH,SMA04J300B,SMB06J13B,5KP14V,SMB06J13V,5KP14B,SMD30J43V,ESD3V3A350TA,AS4V7B151T,AS56VB151T,ESD18J801TRP,SMB06J14B,5KP13V,5KP13B,SMB06J130B,SMB06J14V,SMD30J170B,SMC15J8.5B,AS3V9B151T,SODA18B-SH,SMA04J13B,SMD50J70V,SMA04J13V,SMA04J100B,SMC15J8.5V,SMD50J150V,AS13VB151T,SODA43V-SH,SMD30J64B,SMD30J40B,ASD2F150T,SMA04J14B,SMA04J14V,SMD30J64V,ESD5B150TA,SMD30J40V,SMA04J15B,ESD36D200TA,AS28VA201T,5KP180V,SMA04J11B,AS12VB151T,SODA150V-SH,SMD30J7.0V,SMD30J150V,SMB06J17B,SMB06J150V,5KP10V,5KP58V,SMA04J11V,AM30QP34T,AM30MP7T,5KP58B,SMB06J18B,SMB06J17V,5KP10B,AS5V6A201T,SMA04J12B,SMA04J100V,SMA04J36B,AM20DP071T,5KP33V,SMD30J7.0B,SMA04J12V,SMA04J36V,5KP180B,SMB06J18V,SMD30J150B,5KP33B,SMB06J150B,SMD30J85B,5KP6.0B,AS3V3B151T,ESD6V7J202TUP,SODA8.0B-SH,SODA17B-SH,AS27VB151T,SMA04J7V5B,SMC15J180V,SMA04J17V,SMD30J85V,SMA04J7V5V,SODA16V-SH,SMA04J18B,SODA33B-SH,5KP6.0V,SMB06J20B,SMC15J6.0B,SMD30J60B,AS39VA201T,SMC15J180B,AS2V4A201T,ESD8A005TA,AS7V5A201T,SMB06J20V,SMA04J18V,SMC15J6.0V,SMD30J60V,SODA150B-SH,AM30QP39T,SMD30J7.5B,5KP160V,SMD50J28V,SMB06J170V,ASD2F20T,ESD3V3C250TA,SMD30J130V,SMA04J15V,AM30DP041T,SMA04J16B,SMD30J7.5V,SODA64V-SH,AS9V1B151T,ESD3V3E100SA,AS3V9A201T,AM60L50T,ESD3V3A005TA,SMD30J130B,SODA5.0V-SH,SMA04J16V,5KP160B,AS20VB151T,SMB06J170B,SMA04J17B,SODA48B-SH,5KP28V,AM20DN050T,SODA17V-SH,5KP28B,5KP6.5B,ASD1D40T,SMA04J300V,SMD30J9.0B,SMB06J48B,SMB06J24B,SMB06J24V,SMD30J9.0V,SMB06J48V,SMC15J6.5B,SODA6.0B-SH,SODA64B-SH,SMC15J18V,AS22VB151T,5KP8.0B,5KP250B,SMB06J45B,SMD30J110V,AS8V2A201T,AM120LP29T,ASD2F40T,SMB06J45V,5KP8.0V,SMC15J6.5V,SMC15J8.0B,SODA5.0B-SH,SODA78V-SH,SMB06J22B,SMD30J110B,SMB06J22V,5KP6.5V,AM18PP6T,AS75VB151T,AM60GN4T,SMC15J8.0V,SODA8.0V-SH,SMC15J16V,SMC15J17B,AS24VB151T,SMC15J16B,SMD50J22V,AS3V6A201T,SMB06J60B,SMC15J17V,SODA120B-SH,5KP250V,SMC15J18B,SMA04J170V,SMB06J7V5V,SMD50J24B,5KP90V,ESD5R151TR,SMB06J7V5B,SMC15J14V,5KP120V,AS3V0B151T,AM30GP5T,ASD2F60T,SODA90B-SH,SMC15J14B,SMD50J45B,SMA04J150B,5KP70B,5KP8.5B,SODA20B-SH,ESD5C150TA,ESD12H401TR,SMC15J15V,5KP120B,ESD3V3D005TA,AM30GP4T,AS43VB151T,SMD50J22B,SMC15J15B,SMD50J45V,SODA78B-SH,SMC15J36V,SMD50J26V,ESD12C150TR,SMC15J12V,SM8S66J15V,SMC15J12B,SMC15J36B,SODA33V-SH,SMC15J160V,SMB06J64B,SMC15J13V,AM30MN18T,SMB06J40B,AM30MP12T,SMC15J160B,SODA9.0B-SH,SM8S66J16V,ESD7H701TR,SMB06J64V,SMC15J13B,5KP8.5V,SMB06J40V,SMD50J28B,SMB06J85B,SMC15J58V,SMD50J48V,AM30MN15T,ASD2F200T,SMD50J24V,ESD5D005TA,5KP90B,SMB06J60V,ASD2F80T,SMC15J10V,AS5V6B151T,5KP210B,SMC15J10B,SMB06J85V,SMC15J58B,SMA04J170B,SM8S66J17V,AM30DN040T,AM30GN5T,ESD24R030TR,SODA60V-SH,5KP210V,SODA48V-SH,SMD30J18V,AM20MP8T,SMC15J11V,5KP100B,SMD50J26B,ESD12D080TA,SMC15J11B,SM8S66J18V,5KP100V,AM20MP12T,SMA04J85B,SODA75V-SH,5KP64V,ESD4V5J901TAP,ESD5D080TA,SMD30J17V,SM8S66J10V,SODA130B-SH,SMA04J350B,ESD7E100TA,ESD30A150TA,SMD30J18B,5KP40B,5KP64B,SMA04J85V,AM30DN026T,ESD12A005TA,SMA04J130V,SM8S66J11V,SMD30J16V,SMC15J33V,SMC15J33B,SM8S66J36V,SMD30J17B,AM30GP5T-2,ESD5D003TA,ESD48A150TA,SODA7.5V-SH,AS33VA201T,SODA13B-SH,SMC15J30V,SODA30B-SH,SMC15J54V,SM8S66J12V,SMC15J78V,SMD30J15V,SMC15J54B,SMC15J78B,SM8S66J13V,SMA04J110B,SMB06J09V,SMD30J16B,SMD50J100V,SMC15J110V,SODA12V-SH,SMC15J30B,SMD50J60V,SMA04J350V,ASD2F100T,ESD5M030TR,SMA04J60B,SMC15J110B,SMD30J14V,AS5V1A201T,SM8S66J14V,ESD3V3E150TA,5KP40V,SMA04J60V,AS15VB151T,SMD30J15B,AS20VA201T,SODA22B-SH,SMD50J85V,SM8S66J30V,SMB06J90V,SMB06J100V,ESD24D250TA,ESD15J501TRP,SMD50J43B,5KP60B,AS3V0A201T,SMD30J14B,SODA85B-SH,SODA90V-SH,SODA7

选型指南 - ASIM - 2021/6/23 PDF 中文下载

ASIM（阿赛姆）ESD静电保护二极管选型表

静电防护二极管,静电抑制管,ESD管，VRWM(V):2.0V-36.0V,VBR(V):3.7V-40V,VC(V):32V,IPP(A):6.0V-80V,CJ(pF):0.4pF-2000pF

产品型号	品类	VRWM(V)	VBR(V)	IPP(A）	VC(V)	CJ(pF)	Package	Size（mm）
ESD3E003LA	ESD Diodes	3.0	10.0	3.0	8.0	0.4	0201 DFN0603-2L	0.600.300.45

选型表 - ASIM 立即选型

【应用】基于ASIM ESD整改头戴式蓝牙耳机案例：解决蓝牙断开连接自动关机重启，耳机出现杂音问题

根据耳机的佩戴方式的差异，市场上往往将蓝牙耳机分成了头戴式、入耳式、和半入式等。相对于其它款式的耳机，头戴式蓝牙耳机有着声场好、舒适度高、更不容易伤耳朵和续航表现更为出色等优点；但是在EMC方面，由于头戴式耳机复杂的结构，其ESD往往表现得更加薄弱。本文整改产品头戴式蓝牙耳机，外壳为塑料材，侧面带金属logo。

应用方案发布时间 : 2023-06-29