CN208248083U - A kind of rear-viewing mirror in vehicle pedestal with ETC function - Google Patents

The utility model proposes a kind of inside-automobile rear mirror pedestals with ETC function, including ETC on board unit and are mounted on the base shell at inside-automobile rear mirror back；ETC on board unit is arranged in base shell shell, special train rear-viewing mirror special bracket mounting groove is provided on pedestal, intelligent back vision mirror can be fixed on special train special stand, it is easy for installation secured, bandage type rear-viewing mirror in vehicle can be converted to special train tailored version rear-viewing mirror in vehicle to install, rear-viewing mirror in vehicle is avoided to occur shaking or falling off when driving；ETC on board unit is built in the rear-viewing mirror in vehicle base cavity body, realizes non-parking charge, and avoid the problem of blocking pilot's line of vision.

一种具有ETC功能的车辆内后视镜底座A vehicle interior rearview mirror base with ETC function

技术领域technical field

本实用新型涉及专用短程通信(DSRC)或电子不停车收费(ETC)领域，尤其涉及一种具有ETC功能的车辆内后视镜底座。The utility model relates to the field of dedicated short-range communication (DSRC) or electronic toll collection (ETC), in particular to a vehicle interior rearview mirror base with ETC function.

技术背景technical background

随着社会的发展和科技水平的提高，人们对驾驶汽车的安全性、娱乐性提出了更高的要求，集成4G通讯、微信、倒车影像、车载WiFi热点、蓝牙电话、导航等功能于一身的车辆内后视镜成为市场热点；2016年数据显示，行车记录仪市场销量从曾经的传统式(悬挂式)记录仪为主，转变为带行记录仪的车辆内后视镜占市场销量的70-80％，并且其中90％都是绑带式车辆内后视镜。绑带式后视镜通过绑带和抽拉式挂钩的方式直接固定在后视镜上，安装方便快捷，但是这种使用传统橡胶或硅胶绑带的安装方式，安装后在高温和使用时限的情况下，橡胶本身的紧度会松动，车辆在行驶过程中，主机会出现抖动现象，在高速行车的时候，由于绑带脱落容易带来危险，而且这种方式需要外置走线，外观上两个后视镜套嵌在一起也不够美观。这也是当前绑带式车辆内后视镜行业亟待解决的问题。With the development of society and the improvement of science and technology, people put forward higher requirements for the safety and entertainment of driving cars. It integrates 4G communication, WeChat, reversing image, car WiFi hotspot, Bluetooth phone, navigation and other functions in one. Vehicle interior rearview mirrors have become a hot spot in the market; 2016 data show that the market sales of driving recorders have changed from traditional (suspended) recorders to vehicle interior rearview mirrors with driving recorders accounting for 70% of the market sales. -80%, and 90% of them are strap-on interior rearview mirrors. The strap-type rearview mirror is directly fixed on the rearview mirror by straps and pull-out hooks, which is convenient and quick to install. Under normal circumstances, the tightness of the rubber itself will loosen, and the main unit will vibrate when the vehicle is driving. When driving at high speed, it is easy to cause danger because the straps fall off, and this method requires external wiring. The nesting of two rearview mirrors together is also not beautiful enough. This is also an urgent problem to be solved in the current strap-on vehicle interior rearview mirror industry.

ETC，即电子不停车收费系统，包括安装在收费站ETC车道上的路侧单元RSU及安装在车辆挡风玻璃上的车载单元OBU，RSU与OBU之间通过DSRC技术进行双向数据通信，实现车辆身份的自动识别和自动缴费。目前我国已经实现全国联网，为ETC用户提供跨省服务。但是目前市面上绝大多数ETC车载单元为后装设备，需要用户在前挡风玻璃上找出一处空间安装ETC车载单元，这样既不方便安装，又影响美观，而且还可能影响驾驶员的视线，导致不必要的事故发生。ETC, the electronic non-stop toll collection system, includes the roadside unit RSU installed on the ETC lane of the toll station and the on-board unit OBU installed on the vehicle windshield. Two-way data communication is carried out between the RSU and the OBU through DSRC technology to realize vehicle Automatic identification of identity and automatic payment. At present, my country has achieved nationwide networking to provide cross-provincial services for ETC users. However, most of the ETC vehicle-mounted units currently on the market are rear-mounted equipment, requiring users to find a space on the front windshield to install the ETC vehicle-mounted unit, which is not only inconvenient to install, but also affects the appearance, and may also affect the driver's safety. sight, leading to unnecessary accidents.

实用新型内容Utility model content

为解决现有技术中出现的问题，本实用新型提供一种具有ETC功能的车辆内后视镜底座，其目的是：In order to solve the problems in the prior art, the utility model provides a vehicle interior rearview mirror base with ETC function, the purpose of which is:

(1)本设计用于将现有的绑带式行车记录仪与专车专用后视镜支架进行安装连接，即将该车辆内后视镜底座安装在绑带式后视镜背部，可将绑带式车辆内后视镜转换为专车专用型车辆内后视镜进行安装，避免绑带式车辆内后视镜在行车过程中出现抖动或者脱落现象；(1) This design is used to install and connect the existing strap-type driving recorder with the special car rearview mirror bracket, that is, the base of the vehicle interior rearview mirror is installed on the back of the strap-type rearview mirror, and the strap The strap-on vehicle interior rearview mirror is converted into a special-purpose vehicle interior rearview mirror for installation, so as to avoid the vibration or falling off of the strap-on vehicle interior rearview mirror during driving;

(2)将ETC车载单元内置于该车辆内后视镜底座外壳所形成的腔体内，实现不停车收费，整洁美观避免了遮挡驾驶员视线的问题。(2) The ETC vehicle-mounted unit is built into the cavity formed by the base shell of the vehicle's interior rearview mirror to realize non-stop charging, clean and beautiful, and avoid the problem of blocking the driver's line of sight.

为实现上述目的，本实用新型采用的技术方案是：一种具有ETC功能的车辆内后视镜底座，包括ETC车载单元以及底座外壳；所述底座外壳安装在车辆内后视镜背部和专车专用支架中间；所述ETC车载单元安装在所述底座外壳壳体内。In order to achieve the above purpose, the technical solution adopted by the utility model is: a vehicle interior rearview mirror base with ETC function, including an ETC vehicle-mounted unit and a base shell; the base shell is installed on the back of the vehicle interior rearview mirror and dedicated to In the middle of the bracket; the ETC vehicle-mounted unit is installed in the shell of the base shell.

所述底座上设置专车专用后视镜支架安装槽，用于将底座安装在专车专用支架上，且安装后车辆内后视镜面向车厢后方。The special-purpose rearview mirror bracket installation slot is set on the base, which is used to install the base on the special-purpose support for the special vehicle, and the interior rearview mirror of the vehicle faces the rear of the compartment after installation.

所述底座外壳体内设置有ETC车载单元容置槽，可以将ETC车载单元安装固定在底座壳体内。An ETC vehicle-mounted unit accommodating groove is arranged in the base shell, and the ETC vehicle-mounted unit can be installed and fixed in the base shell.

优选的，所述底座壳体通过螺孔和/或卡扣安装在绑带式车辆内后视镜上。Preferably, the base housing is mounted on the strap-type vehicle interior rearview mirror through screw holes and/or buckles.

优选的，底座底部伸出一个或多个卡位用于从底部托住车辆内后视镜，使底座和后视镜之间安装更加牢固。Preferably, one or more clips protrude from the bottom of the base to support the interior rearview mirror of the vehicle from the bottom, so that the installation between the base and the rearview mirror is more firm.

优选的，底座上进行开孔设计，利于车辆内后视镜的散热。Preferably, holes are designed on the base to facilitate heat dissipation of the vehicle interior rearview mirror.

优选的所述壳体采用聚碳酸酯(简称PC)和/或丙烯腈-丁二烯-苯乙烯共聚物(简称ABS)制成。PC和ABS的混合物，综合了PC和ABS的优点：抗冲击强度高，化学稳定性和电性能良好，同时具有很好的耐高温和耐低温性能。Preferably, the housing is made of polycarbonate (abbreviated as PC) and/or acrylonitrile-butadiene-styrene copolymer (abbreviated as ABS). The mixture of PC and ABS combines the advantages of PC and ABS: high impact strength, good chemical stability and electrical properties, as well as good high temperature and low temperature resistance.

所述ETC车载单元包括控制单元、射频单元、安全单元、读卡器和电源模块。The ETC vehicle-mounted unit includes a control unit, a radio frequency unit, a security unit, a card reader and a power supply module.

所述读卡器和控制单元电连接，用于读取插入卡槽内的IC卡的电子标签信息；所述射频单元和控制单元电连接，用于将读卡器读取的IC卡内信息发送至路测设备，射频单元还用于接收路侧设备发送的过站指令；所述控制单元根据射频单元接收到的过站信息指令控制所述读卡器将更新后的信息写入到IC卡；所述安全单元与控制单元电连接，用于对电子标签卡中的电子信息进行认证；所述电源用于为整个ETC车载单元供电。The card reader is electrically connected with the control unit for reading the electronic label information of the IC card inserted into the card slot; the radio frequency unit is electrically connected with the control unit for the information in the IC card read by the card reader sent to the drive test equipment, and the radio frequency unit is also used to receive the passing instruction sent by the roadside equipment; the control unit controls the card reader to write the updated information into the IC according to the passing information instruction received by the radio frequency unit card; the safety unit is electrically connected to the control unit, and is used to authenticate the electronic information in the electronic tag card; the power supply is used to supply power to the entire ETC vehicle-mounted unit.

优选的，ETC车载单元还包含蓝牙模块，可与车辆内后视镜和手机进行无线通讯。Preferably, the ETC vehicle-mounted unit also includes a Bluetooth module, which can communicate wirelessly with the vehicle interior rearview mirror and the mobile phone.

优选的，读卡器包括接触式读写单元或非接触式读写单元。Preferably, the card reader includes a contact read-write unit or a non-contact read-write unit.

优选的，ETC车载单元设置有升级接口，升级接口与控制单元电连接，升级接口外露于壳体表面。Preferably, the ETC vehicle-mounted unit is provided with an upgrade interface, the upgrade interface is electrically connected to the control unit, and the upgrade interface is exposed on the surface of the housing.

优选的，所述IC卡为内置式IC卡或插拔式IC卡。Preferably, the IC card is a built-in IC card or a plug-in IC card.

优选的，当所述IC卡为插拔式IC卡时，所述底座外壳本体上设置有ETC车载单元的IC卡插卡槽，插卡槽的槽口开设在壳体的朝向车厢右侧的壁上所述外置式IC卡放置在卡槽内，安装稳固，不容易松动。Preferably, when the IC card is a pluggable IC card, the base housing body is provided with an IC card slot for the ETC vehicle-mounted unit, and the notch of the card slot is opened on the right side of the housing towards the compartment. The external IC card on the wall is placed in the card slot, and the installation is firm and not easy to loosen.

本实用新型带来的有益效果是：首先，通过将该车辆内后视镜底座安装在绑带式后视镜背部，将绑带式车辆内后视镜转换为专车专用型车辆内后视镜进行安装，即将现有的绑带式行车记录仪与专车专用后视镜支架进行安装连接，避免绑带式车辆内后视镜在行车过程中出现抖动或者脱落现象的发生，即方便美观，又节省空间，同时起到固定的作用，大大提高车辆内后视镜抗振动性能；其次，将ETC无线通信模块内置于该车辆内后视镜底座外壳所形成的腔体内，实现不停车收费，且避免了遮挡驾驶员视线的问题；车主安装后，只需要通过相应供应商和银行往绑定的IC卡里面充值即可使用。The beneficial effects brought by the utility model are: firstly, by installing the base of the vehicle interior rearview mirror on the back of the strap-type rearview mirror, the strap-type vehicle interior rearview mirror is converted into a special-purpose vehicle interior rearview mirror Installation is to install and connect the existing strap-on driving recorder with the special car rearview mirror bracket, so as to avoid the vibration or falling off of the strap-on vehicle interior rearview mirror during driving, which is convenient and beautiful, and It saves space and at the same time plays a fixed role, greatly improving the anti-vibration performance of the vehicle interior rearview mirror; secondly, the ETC wireless communication module is built into the cavity formed by the base shell of the vehicle interior rearview mirror to realize non-stop charging, and It avoids the problem of blocking the driver's sight; after the car owner installs it, he only needs to recharge the bound IC card through the corresponding supplier and bank to use it.

下面结合附图和实施例对本实用新型做进一步说明。Below in conjunction with accompanying drawing and embodiment the utility model is described further.

附图说明Description of drawings

图1为按照本实用新型一种具有ETC功能的车辆内后视镜底座的安装示意图。Fig. 1 is a schematic diagram of installation of a vehicle interior rearview mirror base with ETC function according to the utility model.

图2为按照本实用新型一种具有ETC功能的车辆内后视镜底座的结构示意图。Fig. 2 is a schematic structural view of a vehicle interior rearview mirror base with ETC function according to the utility model.

图3为按照本实用新型一种具有ETC功能的车辆内后视镜底座的外壳一优选实施例的外部结构正面视图。Fig. 3 is a front view of the external structure of a preferred embodiment of the shell of a vehicle interior rearview mirror base with ETC function according to the utility model.

图4为按照本实用新型一种具有ETC功能的车辆内后视镜底座的外壳一优选实施例的外部结构背部示意图。Fig. 4 is a schematic diagram of the back of the external structure of a preferred embodiment of the shell of a vehicle interior rearview mirror base with ETC function according to the utility model.

图5为按照本实用新型一种具有ETC功能的车辆内后视镜底座的车载单元一优选实施例内部结构示意图。Fig. 5 is a schematic diagram of the internal structure of a preferred embodiment of the vehicle-mounted unit of the vehicle interior rearview mirror base with ETC function according to the utility model.

具体实施方式：Detailed ways:

为使本实用新型实施例的目的、技术方案和有点更加清楚，下面结合本实用新型实施例中的附图，对本实用新型带有ETC功能的车辆内后视镜底座的技术方案进行清楚完整地描述，需要注意的使，所描述的实施例只是本实用新型的一优选实施例，而不是全部实施例。给予本实用新型中实施例，本领域技术人员不难理解，凡是在本实用新型的精神和原则之内，所做的任何修改、等同替换、改进等均应包含在本实用新型的保护范围之内。In order to make the purpose, technical solution and points of the utility model embodiment clearer, the technical solution of the vehicle interior rearview mirror base with ETC function of the utility model is clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment Description, it should be noted that the described embodiment is only a preferred embodiment of the present utility model, rather than all embodiments. Given the embodiments of the present utility model, it is not difficult for those skilled in the art to understand that within the spirit and principles of the present utility model, any modifications, equivalent replacements, improvements, etc. should be included in the protection scope of the present utility model Inside.

图1为实用新型带有ETC功能的车辆内后视镜底座的安装示意图。图2为按照本实用新型带有ETC功能的车辆内后视镜底座的结构示意图。如图1所示，本实用新型带有ETC功能的车辆内后视镜底座将现有的绑带式行车记录仪与专车专用后视镜支架进行安装连接，即将该车辆内后视镜底座2安装在绑带式后视镜1背部，而本实用新型提供的带有ETC功能的车辆内后视镜底座外壳上设置有专车专用后视镜支架安装槽，用于将底座安装在专车专用支架3上，可将绑带式车辆内后视镜转换为专车专用型车辆内后视镜进行安装，避免车辆内后视镜在行车过程中出现抖动或者脱落现象。Figure 1 is a schematic diagram of installation of a vehicle interior rearview mirror base with ETC function in the utility model. Fig. 2 is a structural schematic diagram of a vehicle interior rearview mirror base with an ETC function according to the utility model. As shown in Figure 1, the vehicle interior rearview mirror base with ETC function of the utility model is installed and connected with the existing strap-type driving recorder and the special vehicle rearview mirror bracket, and the vehicle interior rearview mirror base 2 It is installed on the back of the strap-type rearview mirror 1, and the vehicle interior rearview mirror base shell with ETC function provided by the utility model is provided with a special car special rearview mirror bracket mounting groove, which is used to install the base on the special car special bracket. 3. The belt-type vehicle interior rearview mirror can be converted into a special-purpose vehicle interior rearview mirror for installation, so as to avoid the vibration or falling off of the vehicle interior rearview mirror during driving.

如图2所示本实用新型所提供的带有ETC功能的车辆内后视镜底座包括外壳21和ETC车载单元22两部分；结合图3、图4和图5本实用新型带有ETC功能的车辆内后视镜底座一优选实施例的外部结构示意图，所述底座外壳21体内设置有ETC无线模块容置槽212，可以将ETC车载单元22安装固定在掉壳体21内，如此可以实现不停车收费，而且避免了遮挡驾驶员视线的问题；所述底座外壳21设置有专车专用后视镜支架安装槽213，用于将底座2安装在专车专用支架3上，且安装后成后车辆内后视镜1面向车厢后方；可选的，所述壳体21上设有螺孔216以及卡扣218，所述底座2可通过螺孔216和/或卡扣218安装在绑带式车辆内后视镜1上；优选的，底座2底部伸出两个卡位215用于从底部托住绑带式车辆内后视镜1，使底座2和后视镜1之间安装更加牢固；所述底座2上进行开孔设计，在正面和背面设置有散热孔217，利于车辆内后视镜1的散热。As shown in Figure 2, the vehicle interior rearview mirror base with the ETC function provided by the utility model includes two parts of the shell 21 and the ETC vehicle unit 22; in conjunction with Figure 3, Figure 4 and Figure 5, the utility model has the ETC function A schematic diagram of the external structure of a preferred embodiment of the vehicle interior rearview mirror base, the base shell 21 is provided with an ETC wireless module accommodation groove 212, and the ETC vehicle-mounted unit 22 can be installed and fixed in the shell 21, so that no Parking charges, and avoid the problem of blocking the driver's line of sight; The base shell 21 is provided with a special car rearview mirror bracket mounting groove 213, which is used to install the base 2 on the special car special support 3, and after installation, it will be installed in the vehicle. The rearview mirror 1 faces the rear of the compartment; optionally, the housing 21 is provided with a screw hole 216 and a buckle 218, and the base 2 can be installed in a belt-type vehicle through the screw hole 216 and/or the buckle 218 On the rearview mirror 1; preferably, the bottom of the base 2 protrudes two clamping positions 215 for supporting the strap-type vehicle interior rearview mirror 1 from the bottom, so that the installation between the base 2 and the rearview mirror 1 is more firm; Hole design is carried out on the base 2, and cooling holes 217 are arranged on the front and back sides, which is beneficial to the heat dissipation of the vehicle interior rearview mirror 1.

所述壳体采用聚碳酸酯(简称PC)和/或丙烯腈-丁二烯-苯乙烯共聚物(简称ABS)制成。PC和ABS的混合物，综合了PC和ABS的优点：抗冲击强度高，化学稳定性和电性能良好，同时具有很好的耐高温和耐低温性能。The shell is made of polycarbonate (abbreviated as PC) and/or acrylonitrile-butadiene-styrene copolymer (abbreviated as ABS). The mixture of PC and ABS combines the advantages of PC and ABS: high impact strength, good chemical stability and electrical properties, as well as good high temperature and low temperature resistance.

图5为按照本实用新型带有ETC功能的车辆内后视镜底座一优选实施例ETC车载单元内部结构示意图。所述ETC车载单元22包括控制单元224、射频单元222、安全单元223、读卡器225和电源模块226；读卡器225和控制单元224电连接，用于读取插入卡槽211内的IC卡221的电子标签信息；射频单元222和控制单元224电连接，用于将读卡器225读取的IC卡221内信息发送至路测设备，射频单元222还用于接收路侧设备发送的更新过站指令；控制单元224根据射频单元222接收到的更新过站信息指令对电子标签信息进行更新；所述读卡器225还用于将更新后的信息写入到IC卡221中；所述安全单元223与控制单元224电连接，用于对IC卡221中的电子信息进行认证；所述电源226用于为整个ETC车载单元22供电。5 is a schematic diagram of the internal structure of the ETC vehicle-mounted unit of a preferred embodiment of the vehicle interior rearview mirror base with the ETC function according to the utility model. The ETC vehicle-mounted unit 22 includes a control unit 224, a radio frequency unit 222, a security unit 223, a card reader 225 and a power supply module 226; the card reader 225 is electrically connected to the control unit 224 for reading the IC inserted into the card slot 211 The electronic tag information of the card 221; the radio frequency unit 222 is electrically connected with the control unit 224, and is used to send the information in the IC card 221 read by the card reader 225 to the road test equipment, and the radio frequency unit 222 is also used to receive the information sent by the roadside equipment Update the passing instruction; the control unit 224 updates the electronic tag information according to the updating passing information instruction received by the radio frequency unit 222; the card reader 225 is also used for writing the updated information into the IC card 221; The security unit 223 is electrically connected with the control unit 224, and is used for authenticating the electronic information in the IC card 221; the power supply 226 is used for supplying power to the entire ETC vehicle-mounted unit 22.

所述ETC车载单元22还包含蓝牙模块，可与车辆内后视镜1或手机进行无线通讯用于查询余额和交易信息等；所述读卡器215包括接触式读写单元或非接触式读写单元；所述ETC车载单元22设置有升级接口，升级接口与控制单元224电连接，用于ETC车载单元22的升级以及跟车辆内后视镜1进行通信。The ETC vehicle-mounted unit 22 also includes a Bluetooth module, which can communicate wirelessly with the vehicle interior rearview mirror 1 or a mobile phone for checking balances and transaction information, etc.; Writing unit: the ETC vehicle-mounted unit 22 is provided with an upgrade interface, and the upgrade interface is electrically connected to the control unit 224 for upgrading the ETC vehicle-mounted unit 22 and communicating with the vehicle interior rearview mirror 1 .

所述IC卡221为内置式IC卡或插拔式IC卡；当所述IC卡为插拔式IC卡时，所述底座外壳21本体上设置有ETC车载单元22的IC卡插卡槽211，插卡槽的槽口开设在底座壳体的朝向车厢右侧的壁上，所述外置式IC卡221放置在卡槽211内，安装稳固，不容易松动。The IC card 221 is a built-in IC card or a plug-in IC card; when the IC card is a plug-in IC card, the base shell 21 body is provided with an IC card slot 211 of the ETC vehicle-mounted unit 22 , the notch of the card slot is provided on the wall of the base housing towards the right side of the compartment, and the external IC card 221 is placed in the card slot 211, which is firmly installed and not easy to loosen.

在本实施例中，本实用新型所提供的带有ETC功能的车辆内后视镜底座将现有的绑带式行车记录仪与专车专用后视镜支架进行安装连接，即将该车辆内后视镜底座安装在绑带式后视镜背部，且座外壳上设置有专车专用后视镜支架安装槽，用于将底座安装在专车专用支架上，可将绑带式车辆内后视镜转换为专车专用型车辆内后视镜进行安装，避免车辆内后视镜在行车过程中出现抖动或者脱落现象；本实用新型所提供的带有ETC功能的车辆内后视镜底座外壳内设置有ETC车载单元容置槽，可以将ETC车载单元内置于该车辆内后视镜底座腔体内，实现不停车收费，且避免了遮挡驾驶员视线的问题；本实施例中，本实用新型所提供的带有ETC功能的车辆内后视镜底座安装方便，又简洁美观，还不影响驾驶员的视线，可以满足中国国内的驾驶习惯。In this embodiment, the vehicle interior rearview mirror base with ETC function provided by the utility model installs and connects the existing strap-type driving recorder with the special vehicle rearview mirror bracket, that is, the vehicle interior rearview mirror The mirror base is installed on the back of the strap-type rearview mirror, and the seat shell is provided with a special car rearview mirror bracket installation slot, which is used to install the base on the special car bracket, and the strap-type vehicle interior rearview mirror can be converted into a special car The special-purpose vehicle interior rearview mirror is installed to avoid shaking or falling off of the vehicle interior rearview mirror during driving; the vehicle interior rearview mirror base shell with ETC function provided by the utility model is provided with an ETC vehicle-mounted unit The accommodating slot allows the ETC vehicle-mounted unit to be built into the cavity of the rearview mirror base of the vehicle to realize non-stop charging and avoid the problem of blocking the driver's line of sight; The functional vehicle interior rearview mirror base is easy to install, simple and beautiful, and does not affect the driver's line of sight, which can meet the driving habits in China.

最后应该说明的是：以上实施例及用于说明本实用新型的技术方案，而非对其限制；本实用新型说明书的发明内容和具体实施方式部分以及附图所示出的各部分的任意组合，限于篇幅并为使用说明书简明为没有将这些组合构成的各方案一一描述；本领域技术人员不难理解，其可以在本实用新型实施例所属的技术方案基础进行修改，或者对其中部分或者全部技术特征进行等同替换，但是这些修改和替换并不使相应技术方案的本质脱离本实用新型实施例技术方案的范围。Finally, it should be noted that: the above embodiments and the technical solutions used to illustrate the present utility model are not intended to limit it; any combination of the summary of the invention and the specific embodiment part of the specification sheet of the utility model and the various parts shown in the accompanying drawings , due to space limitations and for the sake of brevity in the instructions for use, each scheme that does not constitute these combinations is described one by one; it is not difficult for those skilled in the art to understand that it can be modified on the basis of the technical schemes to which the embodiments of the present invention belong, or some or all of them can be modified. All technical features are equivalently replaced, but these modifications and replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.