baber/WOPTO huggingface dataset:
Patent WO-2020125235-A1 (WO)
Title: Boost power conversion circuit, method, inverter, apparatus and system
Inventor: SHI TAO
IPC: H02S40/32
Filed: 2019-11-01
Abstract: Disclosed are a boost power conversion circuit, a method, an inverter, a device and a system. The conversion circuit adds a voltage control circuit to a three-level Boost, the voltage control circuit can be connected to a third closed loop in series, and the third closed loop is a loop constituted of an inductor, a first switching tube, a flying capacitor, a second diode and an input end; alternatively, a first end of the voltage control circuit is connected to a common end of a first diode and the second diode, a second end of the voltage control circuit is connected to a reference point, the reference point provides a clamping electric potential, and the clamping electric potential is located between a negative bus electric potential and a positive bus electric potential; and the voltage control circuit conducts voltage clamping on a common point of the first diode and the second diode when the voltage at an input end of the boost power conversion circuit is less than a starting voltage of the boost power conversion circuit, and the voltage borne by the second diode is less than a positive bus voltage. The voltage borne by the second diode is decreased, and therefore, the diode with a smaller voltage stress can be selected.
Patent WO-2020098623-A1 (WO)
Title: Semiconductor device, pad structure and fabrication method thereof
Inventor: CHANG CHIH-WEI
IPC: H01L23/488
Filed: 2019-11-12
Abstract: A semiconductor device, a pad structure, and fabricating methods thereof are provided, relating to the field of semiconductor technology. The pad structure includes a substrate, a first dielectric layer, a groove, a bonding pad and a test pad. The first dielectric layer is disposed on the substrate, and the groove is disposed in the first dielectric layer. One of the bonding pad and the test pad is disposed outside the groove and on the surface of the first dielectric layer not adjacent to the substrate, and the other one is disposed on a bottom of the groove. The semiconductor device, the pad structure, and related fabricating methods improve the production yield and stability of the semiconductor device.
Patent WO-2021022716-A1 (WO)
Inventor: JIANG ZHIXIONG
IPC: G02F1/1362
Filed: 2019-11-18
Abstract: A pixel circuit and a liquid crystal display panel comprising a pixel circuit. The pixel circuit comprises a main thin film transistor 1 (Main-TFT) and a sub thin-film transistor 2 (Sub-TFT) connected in parallel. A resistance of the main thin film transistor 1 (Main-TFT) is configured to be less than a resistance of the sub thin-film transistor 2 (Sub-TFT) so as to achieve resistance-based voltage division for the main thin film transistor 1 (Main-TFT) and the sub thin-film transistor 2 (Sub-TFT), such that a voltage of the sub thin-film transistor 2 (Sub-TFT) is less than a voltage of the main thin film transistor 1 (Main-TFT). The pixel circuit requires only two TFTs to realize different brightness levels in different domains, thereby mitigating the problem of color shift in a panel while improving the transmittance of the panel.
Patent WO-2021047056-A1 (WO)
Title: Enhanced reaction system and process for preparing acetic acid by means of carbonylation methanol
Inventor: ZHANG ZHIBING
IPC: C07C51/12
Filed: 2019-11-22
Abstract: Provided are an enhanced reaction system and process for preparing acetic acid by means of the carbonylation of methanol, and the present invention belongs to the technical field of the preparation of acetic acid. The enhanced reaction system comprises a feeding unit for storing and transporting carbon oxide and methanol; a carbonylation reaction kettle with a microinterface generator provided therein, with the carbonylation reaction kettle being connected to the feeding unit and serving as a site for a carbonylation reaction; and the microinterface generator, wherein same is used for breaking bubbles of the carbon oxide into micro-bubbles with a diameter on the micron scale before the carbonylation reaction, so as to increase the mass transfer area of the phase interface between the carbon oxide and the methanol during the progress of the carbonylation reaction, thereby enhancing the efficiency of the carbonylation reaction. The enhanced reaction system and process for preparing acetic acid by means of the carbonylation of methanol, as provided by the present invention, solve the problem of the reaction efficiency of a system being reduced due to the fact that carbon oxide and methanol cannot be sufficiently mixed inside a carbonylation reaction kettle in the prior art.
Patent WO-2020134810-A1 (WO)
Inventor: WU YUMIN
IPC: H04W56/00
Filed: 2019-11-27
Abstract: 一种时间信息的获取方法，包括：接收第一消息(201)，第一消息包括至少一个时间信息，其中，每个时间信息对应各自的时钟源；从第一消息中，获取终端需要的时钟源对应的时间信息(202)。还提供一种时间信息的发送方法、终端和网络设备。
Patent WO-2020238117-A1 (WO)
Inventor: XU QIAN
IPC: G01K13/20
Filed: 2019-12-02
Abstract: 一种探头结构（100），包括探头主体（110）、感温模组（120）和光组件（130），探头主体（110）包括探测端（111）和设置端（112），探测端（111）适于接触或近距离接触被测物，设置端（112）适于连接外部体温计本体（200），探头主体（110）具有存放所述感温模组（120）的容室（113），光组件（130）设于设置端（112），光组件（130）包括至少一个灯（131）、灯板（132）和透光件（133），至少一个灯（131）设于灯板（132）上，透光件（133）设于灯板（132）的外围以使灯（131）发出的光能经该透光件（133）射出。
Patent WO-2020135062-A1 (WO)
Inventor: LUO YUANMING
IPC: A61M16/06
Filed: 2019-12-12
Abstract: 一种使进入呼吸道气体浓度恒定且无呼吸阻力的气体吸入装置，由面罩（1）、气源（11）和气体混合器（10）组成；面罩（1）为一个可容纳50-1000ml气体的开放式面罩，面罩（1）的近端是柔软的垫部（2）可贴合脸面部，面罩（1）近端有一导管（14）环绕，导管（14）设置有与面罩（1）内腔相通的许多小孔（15），导管（14）的一端与转接管（4）的一端连接，转接管（4）的另一端与送气管道（8）连接，送气管道（8）为连接转接管（4）与气源（11）或者气体混合器（10）之间的导管；面罩（1）的远端有保持开放的一个巨大孔（20）或者多个大孔（9），以使面罩（1）腔内压始终为零，并使来自送气管道（8）的气体和呼出气排出畅通，几乎无气流阻力；面罩（1）外面二侧有1-2个头带接口（5）用于连接固定面罩（1）的头带（6），以保证面罩（1）稳定地固定在脸部。
Patent WO-2021093097-A1 (WO)
Title: Safe practice sword suitable for different groups
Inventor: ZHUANG CHANGKUAN
IPC: A63B69/02
Filed: 2019-12-23
Abstract: Disclosed in the present utility model is a safe practice sword suitable for different groups, comprising a sword body, a sword core and a sword handle, the sword body having an elongated strip structure, the sword body being provided from outside to inside with multiple layers of elastic cushioning sleeves, and a middle part of the sword body being provided with a sword core insertion through-hole along an axial direction; the sword core having a hollow elongated strip structure; a front end of the sword handle being provided with an adjustable tightening assembly connected to the sword body, the sword handle having disposed therein a cavity, the cavity comprising an upper elastic cushioning sleeve limiting cavity and a lower counterbalance cavity, the elastic cushioning sleeve limiting cavity having a stepped contraction structure, and the counterbalance cavity having therein a counterbalance. The present utility model has a simple structure, is convenient to use, is low-cost, is safe and reliable, has adjustable weight and hardness, and is suitable for different types of groups.
Patent WO-2020155934-A1 (WO)
Inventor: HUANG YONG
IPC: G02F1/13
Filed: 2019-12-23
Abstract: 一种显示器的校准方法、装置、系统、计算机设备（102）和存储介质，属于校准技术领域。该方法包括：获取传感器（101）的测量值；测量值由传感器（101）通过监测显示器的设定区域的显示画面得到；设定区域属于显示器的边缘区域（S201）；获取显示器的显示性能数据；显示性能数据根据预先建立的映射关系确定；映射关系为传感器（101）的测量值与显示器的显示性能数据之间的映射关系（S202）；根据显示性能数据，选择性地启动显示器的自校准功能；自校准功能用于对显示器进行性能校准（S203）。解决了通过外接校准仪器校准显示器需要经过多项步骤，维护不及时的问题，达到了不需要外接校准仪器来进行校准，并且能及时地对计算机设备（102）的显示器进行性能校准的效果。
Patent WO-2020155960-A1 (WO)
Title: Video playback method and system, computer device, and computer readable storage medium
Inventor: TAN ZHAOXIN
IPC: H04N21/231
Filed: 2019-12-25
Abstract: Provided in the present application is a video playback method, applied to a user terminal. The video playback method comprises: obtaining a video loading instruction, and sending a loading request to a cache server, the loading request being used for requesting loading data, and the loading data comprising at least one slice of a video corresponding to the video loading instruction; receiving the loading data returned by the cache server; and playing at least one slice according to the loading data. Also provided in the present application are another video playback method, a video playback system, a computer device, and a computer readable storage medium.
Patent WO-2020192239-A1 (WO)
Inventor: SHAN JINGHUA
IPC: F16M13/04
Filed: 2020-01-06
Abstract: A clamping mechanism and a handheld stabilizer, relating to the field of photography support equipment. The clamping mechanism comprises an upper clamping part (11), a lower clamping part (12) disposed opposite the upper clamping part (11), a clamping arm (13) used to connect the upper clamping part (11) and the lower clamping part (12), a connecting arm (2) rotatably connected to the clamping arm (13), and a locking assembly (3) used to limit relative rotation of the clamping arm (13) and the connecting arm (2); the locking assembly (3) being disposed at a rotatable connection position of the clamping arm (13) and the connecting arm (2). By means of disposing a locking assembly (3) used to limit relative rotation of a clamping arm (13) and a connection arm (2) between the clamping arm (13) and the connecting arm (2), so as to realize locking of an included angle between the clamping arm (13) and the locking arm (2), the present invention prevents the situation of photography equipment still rotating after a photographing angle has been adjusted, improving a use experience of the handheld stabilizer.
Patent WO-2020156095-A1 (WO)
Inventor: ZHANG ZHAOYANG
IPC: H03M13/13
Filed: 2020-01-10
Abstract: 本申请提供了一种译码的方法和译码装置，该方法包括获取N个待译码比特的软信息，N为大于或等于2的整数；通过译码模型对所述软信息进行译码，获取译码结果，其中，所述译码模型由多个神经网络译码单元构成，每个神经网络译码单元均支持软信息的异或运算，所述译码模型是通过至少一次训练过程得到的。本申请实施例的译码模型能够满足高速率传输和低译码延时的需求，具有良好的译码性能。
Patent WO-2020147792-A1 (WO)
Inventor: LI WENWEI
IPC: H04N5/232
Filed: 2020-01-16
Abstract: 本申请实施例提供了一种视频显示方法、装置、系统及摄像机，摄像机包括：一个大视场镜头组件和大视场镜头组件对应的大视场传感器；至少一个小视场镜头组件和小视场镜头组件对应的小视场传感器；其中，大视场镜头组件的视场角大于小视场镜头组件的视场角，且对于同一目标，大视场传感器的清晰度小于小视场传感器的清晰度；处理器，用于对大视场图像进行人体分析，对至少一帧小视场图像进行人脸分析或头肩分析或人体分析。应用本申请实施例提供的技术方案，能够降低监控时安装和调试摄像机的工作量，降低对服务器的性能要求，降低监控成本。
Patent WO-2020164394-A1 (WO)
Inventor: LI QIAOYU
IPC: H04W72/12
Filed: 2020-01-23
Abstract: Selon divers aspects, la présente invention concerne généralement la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir, d'une station de base (BS), une première communication de signalisation qui configure une pluralité de paires d'indicateurs de matrice de précodeur de transmission (TPMI) et d'indicateurs de ressources de signaux (SRI) de référence de sondage (SRS). Les multiples paires de TPMI et de SRI peuvent être destinées à transmettre des communications de canal partagé de liaison montante physique (PUSCH) respectives à la BS. L'UE peut recevoir, de la BS, une seconde communication de signalisation qui indique une mise à jour à une paire de TPMI et de SRI de la pluralité de paires de TPMI et de SRI. L'UE peut transmettre, à la BS, une communication PUSCH, des communications PUSCH respectives sur la base, au moins en partie, de la mise à jour de la paire de TPMI et de SRI. L'invention se présente également sous de nombreux autres aspects.
Patent WO-2021155514-A1 (WO)
Title: Channel state information (csi) feedback enhancement depicting per-path angle and delay information
Inventor: LIU HAO
IPC: H04B7/0417
Filed: 2020-02-05
Abstract: Systems, methods, apparatuses, and computer program products described herein may provide CSI feedback enhancement depicting per-path angle and delay information. For instance, some embodiments may provide a new codebook design, in which the exact angle and delay information can be acquired for each dominant channel path exploiting spatial domain (SD) and frequency domain (FD) transformation respectively. Specifically, certain embodiments may provide at least the following operations for CSI feedback design: 1) a UE may perform FD transformation using a Fourier transform operation according to the current channel measurement matrix in a subcarrier level to determine the dominant channel paths and the corresponding delays; 2) the UE may determine the angle information for each dominant channel path exploiting SD transformation; and 3) after FD and SD transformation, the UE may reduce the channel matrix in its dimension, and the UE may quantize linear combination (LC) coefficients for feedback.
Patent WO-2021159277-A1 (WO)
Title: Data communication method and apparatus, and communication device and storage medium
Inventor: YANG XING
IPC: H04W36/00
Filed: 2020-02-11
Abstract: Embodiments of the present disclosure relate to a data communication method and apparatus, and a communication device and a storage medium. In response to a user equipment triggering conditional handover, a first data inactivity timer of a source cell corresponding to the conditional handover continues timing.
Patent WO-2020173308-A1 (WO)
Inventor: IINUMA FUTOSHI
IPC: G03B17/14
Filed: 2020-02-13
Abstract: In a device capable of switching between multiple optical filters, a further reduced thickness is expected so as to implement miniaturization. An optical filter device of the present invention may comprise a first optical filter, a first retaining frame, two first support bodies, a first electric motor, a first transferring mechanism, a second optical filter, a second retaining frame, two second support bodies, a second electric motor, and a second transferring mechanism. The distance between the optical axis of the photographing device and either first support body of the two first support bodies supporting a first lateral part of the first retaining frame may be different from the distance between the optical axis and either second support body of the two support bodies supporting a first lateral part of the second retaining frame. The distance between the other first support body of the two first support bodies supporting a second lateral part of the first retaining frame may be different from the distance between the optical axis and the other second support body of the two second support bodies supporting a second lateral part of the second retaining frame.
Patent WO-2021184140-A1 (WO)
Title: Information processing method and apparatus
Inventor: MA QIANLI
IPC: H04W72/04
Filed: 2020-03-14
Abstract: The present application provides an information processing method and apparatus. The method comprises: an access network device sends configuration information to a first device, the configuration information comprising a value X of an adjustment factor, and the X being a positive integer; and correspondingly, the first device receives the configuration information. Moreover, the first device can also detect a PDCCH in a search space period P and on any one or more of at least two time slots according to the configuration information, wherein a time slot interval between two adjacent time slots for detecting the PDCCH in the at least two time slots is less than X, that is, the PDCCH may be placed on the interval time slot. According to the present application, the first device has enough time to detect the PDCCH, and improves the detection efficiency of the first device.
Patent WO-2021155629-A1 (WO)
Inventor: WANG JING
IPC: H01L51/56
Filed: 2020-03-24
Abstract: Provided are a display device and a manufacturing method therefor. The display device comprises an organic light-emitting device, a thin film encapsulation layer, and a hydrophobic thin film. The thin film encapsulation layer covers the organic light-emitting device. The hydrophobic thin film covers the thin film encapsulation layer. The hydrophobic thin film is provided with at least one first pattern.
Patent WO-2021098110-A1 (WO)
Inventor: ZHI LIPENG
IPC: B29C55/14
Filed: 2020-03-26
Abstract: Provided in the present invention are a device and a method for preparing a high-strength high-modulus polyolefin thin film, and a high-strength high-modulus polyolefin thin film. The device for preparing a high-strength high-modulus polyolefin thin film comprises a melt extruder, a cooling system, a stretching system, and an extraction system configured in sequence. The method for preparing a high-strength high-modulus polyolefin thin film comprises: melting and plasticising polyolefin resin and a solvent in a melt extruder; after extrusion though a die, implementing heat-induced phase separation at a shaping roller and cooling tank to obtain a casting sheet; and by means of multi-stage combined stretching system stretching, extraction system extraction and post-processing, obtaining the high-strength high-modulus polyolefin thin film. The high-strength high-modulus polyolefin thin film is obtained using the method for preparing a high-strength high-modulus polyolefin thin film. The polyolefin thin film prepared using the device and method provided in the present application achieves ultra-high rate stretching, and the obtained thin film has good uniformity, strength, and heat shrinkage properties.
Patent WO-2020233244-A1 (WO)
Inventor: SUN QIUYUN
IPC: F04C15/00
Filed: 2020-03-31
Abstract: A screw pump, comprising a suction chamber (31), a discharge chamber (32), a rotor, a stator, and a transmission shaft (33). The rotor comprises a rotor body (11) and a joint (12), and the diameter of the rotor body (11) is gradually changed from large to small from the end connected to the joint (12) to the end away from the joint (12); the stator comprises a stator body (21) and a stator sleeve (22), a stator spiral hole (23) for mounting the rotor is arranged on the stator body (21) along the length direction thereof, and the diameter of the stator spiral hole (23) is gradually changed from large to small from one end to the other end; the joint (12) is connected to the transmission shaft (33) by means of a first universal joint (34), the other end of the transmission shaft (33) is connected, by means of a second universal joint (35), to a drive motor for driving the rotor to rotate in the stator, the discharge chamber (32) and the suction chamber (31) are detachably mounted at two ends of the stator, respectively, and the first universal joint (34), the second universal joint (35), and the transmission shaft (33) are all located in the suction chamber. The screw pump is long in service life, and has the use cost reduced.
Patent WO-2021207867-A1 (WO)
Title: 滤波电缆
Inventor: HAN YUNAN
IPC: H01P1/202
Filed: 2020-04-13
Abstract: 一种滤波电缆，解决相关技术中缺乏能够更好的应对复杂电磁环境中的各种问题、且结构设计简单合理的器件的问题，滤波电缆包括芯线；该芯线包括绝缘基体（11）和包围该绝缘基体（11）的第一导体层（12）；该第一导体层（12）具有第一刻蚀图案（120）；该第一刻蚀图案（120）沿该滤波电缆轴向分布式设置；该第一刻蚀图案（120）用于使得该滤波电缆等效成第一滤波电路，以实现滤波功能。
Patent WO-2020221156-A1 (WO)
Title: Srs资源配置方法、bwp的切换处理方法和相关设备
Inventor: SI YE
IPC: H04W4/02
Filed: 2020-04-26
Abstract: 本公开实施例提供一种SRS资源配置方法、BWP的切换处理方法和相关设备，该SRS资源配置方法包括：向终端发送第一配置信息，所述第一配置信息用于配置探测参考信号SRS资源的图样，所述SRS资源在频域等间隔分布，且间隔的子载波的数量为M，M为大于4的整数。
Patent WO-2020249094-A1 (WO)
Title: Housing assembly and assembling method therefor, and terminal
Inventor: QIAN ZAIJUN
IPC: H04M1/02
Filed: 2020-06-12
Abstract: Provided are a housing assembly and an assembling method therefor, and a terminal, which relate to the technical field of displaying, and are used for solving the problem of improving a bonding effect while reducing the cost of bonding between parts in a terminal device. The housing assembly comprises a first middle frame comprising a first bearing plate and a first side frame, wherein the first side frame is arranged around the first bearing plate, the first side frame is connected to the first bearing plate, and the first bearing plate is provided with a first surface; a rear cover located on a side of the first surface of the first bearing plate; a first adhesive strip located between the first side frame and the rear cover, wherein the first adhesive strip is used for connecting the first side frame to the rear cover so that the rear cover, the first side frame and the first bearing plate form a first accommodation cavity. The material of the first adhesive strip is a hot melt adhesive.
Patent WO-2020249124-A1 (WO)
Title: Handling video unit boundaries and virtual boundaries based on color format
Inventor: ZHANG LI
IPC: H04N19/117
Filed: 2020-06-15
Abstract: A method of video processing includes determining, for a conversion between a block of a video and a bitstream representation of the video, whether a sample of the block is positioned within a distance from a boundary of the block to be a boundary sample for a filtering process according to a rule associated with a component identity of the block. The method also includes performing the conversion based on the determining.
Patent WO-2021004314-A1 (WO)
Inventor: ZHOU WEI
IPC: A47L9/16
Filed: 2020-06-29
Abstract: A vacuum cleaner (100), comprising a body (110), a bracket assembly (120), a first component (131), and a second component (132). The body (10) has a dust and gas inlet (111) and a dust and gas outlet (112), the bracket assembly (120) comprising a first bracket (121) and a second bracket (123), there being a first air duct (122) in the first bracket (121) and there being a second air duct (124) in the second bracket (123), the first air duct (122) and the second air duct (124) being in communication by means of a connecting air duct (113), the first component (131) being used for performing dust removal or noise cancellation on the air flow in the first air duct (122), and the second component (132) being used for performing dust removal or noise cancellation on the air flow in the second air duct (124).
Patent WO-2021047248-A1 (WO)
Inventor: LI BIN
IPC: G10L15/26
Filed: 2020-06-30
Abstract: 一种基于多控制终端的IOT设备控制方法、控制终端及存储介质，方法包括：接收用户发送的包括唤醒词的语音信息，并提取该语音信息的分贝值（S10）；将提取的分贝值发送至预设判断终端，以使预设判断终端根据分贝值以及其他控制终端在同一时间接收到该语音信息时所反馈的对应分贝值，发送唤醒通知至最大分贝值对应的控制终端（S20）；当接收到预设判断终端发送的唤醒通知时，根据唤醒通知进入唤醒模式（S30）；当在唤醒模式下接收到用户发送的包括设备类型和控制指令的语音信息时，根据该控制指令控制该设备类型对应的IOT设备（S40）。
Patent WO-2021012919-A1 (WO)
Title: 金属触片结构、电连接组件和电子设备
Inventor: CHEN HUAN
IPC: H01R9/16
Filed: 2020-07-01
Abstract: 本发明的实施例提供了一种金属触片结构、电连接组件和电子设备，涉及电子设备技术领域。该金属触片结构包括金属片和与金属片一体成型的三个连接部，每个连接部分别与一个待连接件电连接。该电连接组件包括安装基板和上述的金属触片结构，安装基板与金属触片结构连接，实现金属触片结构的固定安装，便于实现多个待连接件的电连接，安装快捷方便、效率高。该电子设备采用上述的电连接组件，有利于提高装配效率及生产效率。
Patent WO-2022000421-A1 (WO)
Inventor: DONG XIANDONG
IPC: H04W52/02
Filed: 2020-07-02
Abstract: Disclosed in embodiments of the present disclosure are a wireless communication method and apparatus, a communication device, and a storage medium. The wireless communication method applied to a first device comprises: sending, on a transmission connection, a first message frame carrying a flexible multicast service (FMS) descriptor element, wherein the FMS descriptor element at least comprises transmission parameters for transmitting FMS streams on multiple transmission connections.
Patent WO-2021139130-A1 (WO)
Title: Dynamic progressive failure analysis method for composite multi-scale model
Inventor: QI ZHENCHAO
IPC: G06F30/23
Filed: 2020-07-16
Abstract: For a mechanical response and progressive damage behavior generated by a composite laminate structure under dynamic working conditions, firstly, taking the different mechanical behaviors of a fiber and a matrix in a microscopic state into consideration, a three-dimensional multi-scale dynamic progressive damage evolution law model based on a microscopic failure theory is provided, and on the basis of micro-component degeneration elasticity parameters in a typical representative volume element model, a new damage evolution law model of the fiber and the resin matrix and an auxiliary deletion criterion of a failure element are provided; and secondly, a stress amplification coefficient is used for establishing a model for relationships between macro stress in a composite model and micro stress in a representative volume element, and intralaminar and interlaminar damage behaviors of a composite under the cutting action of a dagger drill are simulated in conjunction with a bilinear cohesive element model.
Patent WO-2021013157-A1 (WO)
Inventor: ZHANG MIN
IPC: H01M10/04
Filed: 2020-07-21
Abstract: 本申请实施方式公开了一种二次电池，其包括电极组件、包装袋和电极引线。包装袋包括第一包装膜和第二包装膜，电极组件设置于第一包装膜和第二包装膜之间，电极引线连接于电极组件。第一包装膜和第二包装膜各包括主体部、两个延伸部和两个连接部，主体部位于电极组件沿厚度方向的一侧，两个连接部分别位于电极组件沿横向的两侧，两个延伸部分别从主体部沿横向的两端延伸且分别连接于两个连接部。各延伸部包括第一圆弧区、倾斜区和第二圆弧区，第一圆弧区连接于主体部沿横向的端部，第二圆弧区连接于连接部沿横向靠近主体部的端部，倾斜区连接于第一圆弧区和第二圆弧区之间。第一包装膜的两个连接部分别连接于第二包装膜的两个连接部。