WO2017198089A1 - 一种全方位牙齿清洁工具 - Google Patents

一种全方位牙齿清洁工具 Download PDF

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Publication number
WO2017198089A1
WO2017198089A1 PCT/CN2017/083559 CN2017083559W WO2017198089A1 WO 2017198089 A1 WO2017198089 A1 WO 2017198089A1 CN 2017083559 W CN2017083559 W CN 2017083559W WO 2017198089 A1 WO2017198089 A1 WO 2017198089A1
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WIPO (PCT)
Prior art keywords
brush
shaft
drive shaft
cleaning tool
notch
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PCT/CN2017/083559
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English (en)
French (fr)
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蓝经强
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蓝经强
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Publication of WO2017198089A1 publication Critical patent/WO2017198089A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/222—Brush body details, e.g. the shape thereof or connection to handle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/24—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously
    • A61C17/26—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously driven by electric motor

Definitions

  • the present invention relates to dental ware, and more particularly to an omnidirectional dental cleaning tool.
  • the object of the present invention is to provide an all-round tooth cleaning tool, which is provided with a U-shaped groove brush by a toothbrush head having an elongated shape, and a U-shaped groove brush is fastened to the teeth, and the motor is used to drive the hair.
  • the brush rotates back and forth along the U-shaped groove, it can be used to brush the teeth parallel to the teeth.
  • the toothbrush head does not need to be moved up and down. It is only necessary to horizontally pull back and forth, so that it can be easily brushed without damaging the gums.
  • An omnidirectional tooth cleaning tool comprising a handle and a brush head, wherein a battery and a motor are disposed in the handle, and a drive shaft is coupled to the motor shaft, wherein the brush head includes a frame, and the frame has an open upper end a U-shaped notch closed at the lower end, the notch is a notch which can cover both sides of the tooth, and at least two brush drive shafts are arranged on the frame, and the two brush drive shafts are respectively parallel to the sides of the notch
  • the slot is extended in the direction, and the driving shaft in the handle drives the brush drive shaft to rotate through the rotating interface disposed at the end of the slot, and the brush drive shaft drives the brush to rotate around the brush drive shaft.
  • the solution is further that the handle and the brush head are two separate components, and the brush head is integrally connected to the handle by a snap at the rotary interface.
  • the brush is disposed on the brush drive shaft
  • the rotation interface includes a driving gear and a steering gear
  • the driving gear is connected to the driving shaft
  • the driving gear shaft has a transmission gear and a steering gear. Engagement with the transmission gear drives the brush shaft rotation on both sides of the notch.
  • the solution is further that: the combination of the driving gear and the steering gear drives the rotation of the brush shaft on both sides of the notch, and the brush rotating shaft rotates in opposite directions respectively.
  • the solution further is that there are three brush drive shafts, wherein two brush drive shafts are respectively arranged on both sides of the slot parallel to the slot extension direction, wherein one brush drive shaft is extended parallel to the slot at the bottom end of the slot Direction setting.
  • the brush is an annular brush belt
  • the brush drive shaft has four, which are respectively arranged on the two sides of the slot parallel to the length of the slot, and the annular brush strip is sleeved on the four brushes.
  • the solution is further that the base band of the annular brush strip is elastic rubber, and the annular brush strip automatically forms a groove when the notch is inserted into the tooth.
  • the solution is further that at least two beadings are provided on the closed side of the notch, and the bead is pressed against the annular bristle belt so that the annular bristle belt forms a groove into which the teeth can be inserted.
  • the shaft surface with the transmission gear brush drive shaft is a rubber surface
  • the shaft surface without the transmission gear brush drive shaft is a plastic smooth surface
  • the inner side of the base belt of the annular brush belt and the brush The drive shaft contact surface is a pockmark.
  • the shaft surface with the transmission gear brush drive shaft is a toothed surface with convex teeth
  • the shaft surface without the transmission gear brush drive shaft is a plastic smooth surface
  • the annular brush belt The base belt is provided with perforations that mesh with the toothed surface teeth.
  • the invention has the beneficial effects that the brushing can be realized in one-time and all-round, and the brushing can be performed on the movement parallel to the teeth.
  • the toothbrush head does not need to be moved up and down, and only needs to be horizontally pulled back and forth to achieve easy brushing. Does not damage the gums.
  • Figure 1 is a schematic structural view of the present invention
  • FIG. 2 is a schematic diagram of a transmission relationship of the present invention
  • Figure 3 is a schematic view showing the structure of three brush drive shafts of the present invention.
  • Figure 4 is a schematic view showing the first assembly relationship of the annular brush belt of the present invention.
  • Figure 5 is a schematic view showing the second assembly relationship of the annular brush belt of the present invention.
  • FIGS. 6 and 7 are schematic views showing the assembly relationship of two other annular brush bands of the present invention.
  • An omnidirectional tooth cleaning tool as shown in FIG. 1 and FIG. 2, includes a handle 1 and a brush head 2, and a battery 3 and a motor 4 are disposed in the handle, and the battery is connected to the motor through a switch 5 provided on the handle.
  • a driving shaft 6 is coupled to the motor shaft, wherein the brush head includes a frame 7 having a U-shaped notch 701 with an open upper end closed at the upper end, and the U-shaped notch can be divided into two parts as shown in FIG.
  • the two segments may also be a segment; the notches are notches that can be inserted into the teeth and envelop on both sides of the teeth, and at least two brush drive shafts 8 are disposed on the frame, and the two brush drive shafts are respectively at the notches Flat on both sides
  • the driving shaft in the handle is driven by the rotating interface 702 disposed at the end of the slot to drive the brush drive shaft to rotate, and the brush drive shaft drives the brush 9 to rotate around the brush drive shaft.
  • the handle and the brush head may be a unitary structure, the handle is high in cost, and for sanitary and easy replacement, in the embodiment, the handle and the brush head are two separate components, the brush head At the rotating interface, the buckle is connected to the handle by a buckle. This structure makes it easy to remove the brush head.
  • the brush is disposed on the brush drive shaft
  • the rotation interface includes a driving gear and a steering gear
  • the driving gear is connected to the driving shaft
  • the driving gear shaft has a transmission gear and a steering gear. Engagement with the transmission gear drives the brush shaft rotation on both sides of the notch.
  • the combination of the driving gear and the steering gear drives the rotation of the brush shaft on both sides of the notch, and the rotating shaft of the brush rotates in opposite directions, so that the two sides of the tooth can be moved along the two sides of the tooth. Brush your teeth in one direction.
  • the brush drive shaft has three, wherein two brush drive shafts are respectively arranged on both sides of the slot parallel to the slot extension direction, wherein one brush drive shaft is in the slot.
  • the bottom end of the mouth is arranged parallel to the direction in which the slot extends.
  • the brush 9 is an annular brush belt, and the brush drive shaft has four, and the four brush drive shafts are divided into two groups, respectively.
  • the two brush drive shafts of each group are arranged up and down parallel to the length of the slot, and the annular brush strip is sleeved on the outer side of the four brush drive shafts, at least one of which has a brush drive shaft
  • the rotation interface includes a driving gear 10 and a steering gear 11, and the driving gear is used for connecting with the driving shaft 6, and the steering gear meshes with the transmission gear to drive the rotation of the brush shaft.
  • the annular brush belt is composed of a brush and a base belt, and the base belt of the annular brush belt is elastic rubber. When the notch is inserted into the tooth, the annular brush belt automatically forms a groove.
  • At least two beadings 12 are disposed on the closed side of the notch, and the bead is pressed against the annular bristle belt so that the annular bristle belt forms a groove into which the teeth can be inserted, since the brush is an erect long hair,
  • the beading may be perforated or only at the edge, so the setting of the bead does not affect the brushing; of course, the bead may also be set to 3 in the left, center and right.
  • the brush drive shaft drives the annular brush belt to rotate, in order to increase the friction between the annular brush belt and the driven brush drive shaft:
  • the shaft surface with the transmission gear brush drive shaft is a rubber surface, without
  • the axial surface of the transmission gear brush drive shaft is a plastic smooth surface, and the inner side of the base belt of the annular brush belt and the brush drive shaft contact surface are pockmarks.
  • the shaft surface with the transmission gear brush drive shaft is a toothed surface with convex teeth
  • the shaft surface without the transmission gear brush drive shaft is a plastic smooth surface
  • the base belt of the annular brush belt A perforation that engages the toothed surface teeth is provided.
  • FIGs 6 and 7 illustrate the form of two other annular brush bands, as shown in Figure 6 on both sides of the groove, respectively driven by two pairs of brush drive shafts, as shown in Figure 7 is placed in the concave
  • the two sides of the slot and the lower end are respectively driven by three pairs of brush drive shafts; therefore, the transmission form of the annular brush belt should be changed without any deviation from the basic structure of the embodiment.
  • the brush drive shaft is embedded in the brush head through the card slot, and the structure can be separately replaced after the brush is worn or deformed multiple times, thereby saving replacement. cost.
  • the brush in order to reduce the discomfort caused by the brush brush around the circumference of the brush drive shaft so that the entire brush head is too wide, the brush can also be arranged such that the brush is arranged around the two brushes.
  • the opposite side of the drive shaft forms a half or a side of the brush drive shaft with a brush, and the transmission mode is: the rotary interface drives the rotation of the brush drive shaft to be less than one-half of the circumference of the swinging rotation .
  • the above-mentioned embodiment of the omni-directional tooth cleaning tool can realize one-time all-round brushing, and can truly achieve the movement of the teeth parallel to the teeth.
  • the depth of the notch of the toothbrush head is properly selected, and the toothbrush head does not need to be moved up and down, and only needs to be done. Pulling back and forth horizontally allows for easy brushing without damaging the gums.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Brushes (AREA)

Abstract

一种全方位牙齿清洁工具，包括刷柄（1）和刷头（2），刷柄（1）中设置有电池（3）和电机（4），一个驱动转轴（6）与电机轴连接，其中，刷头（2）包括有一个框架（7），框架（7）带有一个上端敞开下端封闭的槽口（701），槽口（701）是可以包住牙齿两侧的槽口，在框架（7）上至少设置有两个毛刷传动轴（8），两个毛刷传动轴（8）分别在槽口（701）两侧平行于槽口（701）延长方向设置，刷柄（1）中的驱动转轴（6）通过在槽口（701）端部设置的转动接口（702）带动毛刷传动轴（8）转动，毛刷传动轴（8）带动毛刷（9）围绕毛刷传动轴（8）转动。本装置可以实现一次性全方位的刷牙，真正可以实现对做平行于牙缝的运动刷牙，牙刷头（2）无需做上下运动，只需做水平前后拉动，就可以实现轻松刷牙，而不损伤牙龈。

Description

一种全方位牙齿清洁工具 技术领域
本发明涉及牙齿洁具，特别涉及一种全方位牙齿清洁工具。
背景技术
保护牙齿是人们生活中非常重要，而刷牙是保护牙齿中的重要环节，为了有效的刷牙人们研究了各种牙刷，电动牙刷的出现帮助了人实现了刷牙的自动化，然而目前的电动牙刷的梳毛是垂直于牙齿横向旋转的，结果造成了对牙龈的伤害，为此又出现了震动毛刷，但无论是横向的毛刷。还是震动毛刷，在刷牙时都需要上下运动，因此稍不注意还是避免不了对牙龈的损伤，因此牙医时常要嘱咐人们注意，并对此束手无策。
发明内容
本发明的目的是提出一种全方位牙齿清洁工具，通过将牙刷头设置为长形的，其断面为U形槽的毛刷，将U形槽的毛刷扣在牙齿上，用电机带动毛刷沿U形槽往复转动，就可以做平行于牙缝的运动刷牙，牙刷头无需做上下运动，只需做水平前后拉动，就可以实现轻松刷牙，而不损伤牙龈。
为了实现上述目的，本发明的技术方案是：
一种全方位牙齿清洁工具，包括刷柄和刷头，刷柄中设置有电池和电机，一个驱动转轴与电机轴连接，其中，所述刷头包括有一个框架，所述框架带有上端敞开下端封闭的U形槽口，所述槽口是可以包住牙齿两侧的槽口，在框架上至少设置有两个毛刷传动轴，两个毛刷传动轴分别在槽口两侧平行于槽口延长方向设置，刷柄中的驱动转轴通过在槽口端部设置的转动接口带动毛刷传动轴转动，毛刷传动轴带动毛刷围绕毛刷传动轴转动。
方案进一步是：所述刷柄和刷头是两个独立的部件，所述刷头在转动接口处通过卡扣与刷柄连接为一体。
方案进一步是：所述毛刷环绕设置固定在毛刷传动轴上，所述转动接口包括主动齿轮和转向齿轮，主动齿轮用于与驱动转轴连接，毛刷传动轴上带有传动齿轮，转向齿轮与传动齿轮啮合带动槽口两侧的毛刷转轴旋转。
方案进一步是：所述主动齿轮与转向齿轮的组合带动槽口两侧的毛刷转轴旋转是毛刷转轴分别向相反的方向旋转。
方案进一步是：所述毛刷传动轴有三个，其中两个毛刷传动轴分别在槽口两侧平行于槽口延长方向设置，其中一个毛刷传动轴在槽口底端平行于槽口延长方向设置。
方案进一步是：所述毛刷是一个环形毛刷带，所述毛刷传动轴有四个，分别在槽口两侧平行于槽口长度方向上下设置，环形毛刷带套在四个毛刷传动轴的外侧，其中至少有一个毛刷传动轴上带有传动齿轮，所述转动接口包括主动齿轮和转向齿轮，主动齿轮用于与驱动转轴连接，转向齿轮与传动齿轮啮合带动毛刷转轴旋转。
方案进一步是：所述环形毛刷带的基带为弹性橡胶，当所述槽口插入牙齿时，环形毛刷带自动形成凹槽。
方案进一步是：在所述槽口的封闭侧设置有至少两个压条，压条压在环形毛刷带上，使环形毛刷带形成一个可以插入牙齿的凹槽。
方案进一步是：所述带有传动齿轮毛刷传动轴的轴面是橡胶面，不带有传动齿轮毛刷传动轴的轴面是塑料光面，所述环形毛刷带的基带内侧与毛刷传动轴接触面是麻面。
方案进一步是：所述带有传动齿轮毛刷传动轴的轴面是带凸起齿的齿形面，不带有传动齿轮毛刷传动轴的轴面是塑料光面，所述环形毛刷带的基带设置有与齿形面齿相啮合的齿孔。
本发明的有益效果是：可以实现一次性全方位的刷牙，真正可以实现对做平行于牙缝的运动刷牙，牙刷头无需做上下运动，只需做水平前后拉动，就可以实现轻松刷牙，而不损伤牙龈。
下面结合附图和实施例对本发明作一详细描述。
附图说明
图1为本发明结构示意图；
图2为本发明传动关系示意图；
图3为本发明三个毛刷传动轴结构示意图；
图4为本发明环形毛刷带第一种装配关系示意图；
图5为本发明环形毛刷带第二种装配关系示意图；
图6和图7为本发明另外两种环形毛刷带装配关系示意图。
具体实施方式
一种全方位牙齿清洁工具，如图1和图2所示，包括刷柄1和刷头2，刷柄中设置有电池3和电机4，电池通过在刷柄上设置的开关5连接电机，一个驱动转轴6与电机轴连接，其中，所述刷头包括有一个框架7，所述框架带有上端敞开下端封闭的U形槽口701，U形槽口可以如图1所示前后分为两段，也可以是一段；所述槽口是可以插入牙齿、包住牙齿两侧的槽口，在框架上至少设置有两个毛刷传动轴8，两个毛刷传动轴分别在槽口两侧平 行于槽口延长方向设置，刷柄中的驱动转轴通过在槽口端部设置的转动接口702带动毛刷传动轴转动，毛刷传动轴带动毛刷9围绕毛刷传动轴转动。
实施例中：刷柄和刷头可以为一体结构，刷柄成本高，并且为了卫生以及便于更换，在本实施例中，所述刷柄和刷头是两个独立的部件，所述刷头在转动接口处通过卡扣与刷柄连接为一体。此种结构，可以很方便的拆卸刷头更换。
实施例中：所述毛刷环绕设置固定在毛刷传动轴上，所述转动接口包括主动齿轮和转向齿轮，主动齿轮用于与驱动转轴连接，毛刷传动轴上带有传动齿轮，转向齿轮与传动齿轮啮合带动槽口两侧的毛刷转轴旋转。
实施例中：如图2所示，所述主动齿轮与转向齿轮的组合带动槽口两侧的毛刷转轴旋转是毛刷转轴分别向相反的方向旋转，这样就可以顺着牙缝双面朝着一个方向刷牙。
实施例中：为了同时实现对牙齿上端面的清理，有两个优选方案：
其中一个优选方案是：如图3所示，所述毛刷传动轴有三个，其中两个毛刷传动轴分别在槽口两侧平行于槽口延长方向设置，其中一个毛刷传动轴在槽口底端平行于槽口延长方向设置。
其中另一个优选方案是：如图4和图5所示，所述毛刷9是一个环形毛刷带，所述毛刷传动轴有四个，四个毛刷传动轴分为两组，分别在槽口两侧，每一组的两个毛刷传动轴平行于槽口长度方向上下设置，环形毛刷带套在四个毛刷传动轴的外侧，其中至少有一个毛刷传动轴上带有传动齿轮，如图2所示，所述转动接口包括主动齿轮10和转向齿轮11，主动齿轮用于与驱动转轴6连接，转向齿轮与传动齿轮啮合带动毛刷转轴旋转。
其中：所述环形毛刷带由毛刷和基带组成，所述环形毛刷带的基带为弹性橡胶，当所述槽口插入牙齿时，环形毛刷带自动形成凹槽。
或者：在所述槽口的封闭侧设置有至少两个压条12，压条压在环形毛刷带上，使环形毛刷带形成一个可以插入牙齿的凹槽，由于毛刷是直立的长毛，压条可以是贯穿的，也可以只在边缘设置，因此，压条的设置并不会影响刷牙；当然压条还可以是左、中、右设置3个。
实施例中毛刷传动轴带动环形毛刷带转动，为了增加环形毛刷带与驱动的毛刷传动轴摩擦力：所述带有传动齿轮毛刷传动轴的轴面是橡胶面，不带有传动齿轮毛刷传动轴的轴面是塑料光面，所述环形毛刷带的基带内侧与毛刷传动轴接触面是麻面。
或者：所述带有传动齿轮毛刷传动轴的轴面是带凸起齿的齿形面，不带有传动齿轮毛刷传动轴的轴面是塑料光面，所述环形毛刷带的基带设置有与齿形面齿相啮合的齿孔。
图6和图7示意了另外两种环形毛刷带的形式，如图6所示是在设置在凹槽两侧，分别由两对毛刷传动轴带动，如图7所示是设置在凹槽两侧和低端分别由三对毛刷传动轴带动；因此，无论如何变化环形毛刷带的传动形式，都应没有脱离本实施例的基本结构。
实施例中，为了减少整体的更换刷头，所述毛刷传动轴通过卡槽嵌入到刷头上，这样的结构就可以当毛刷多次使用磨损或变形后可进行单独更换，节约了更换成本。
并且，为了减小毛刷环绕毛刷传动轴圆周设置，使得刷头整体过宽所带来的不舒适感，毛刷还可以这样设置，即：所述毛刷环绕设置固定在两个毛刷传动轴相对的侧面，形成毛刷传动轴半个侧面或者少半个侧面有毛刷，而且传动方式为：所述转动接口带动毛刷传动轴的转动是小于二分之一圆周的来回摆动转动。
上述全方位牙齿清洁工具实施例，可以实现一次性全方位的刷牙，真正可以实现对做平行于牙缝的运动刷牙，牙刷头的槽口深度选择合适，牙刷头无需做上下运动，只需做水平前后拉动，就可以实现轻松刷牙，而不损伤牙龈。

Claims (12)

  1. 一种全方位牙齿清洁工具，包括刷柄和刷头，刷柄中设置有电池和电机，一个驱动转轴与电机轴连接，其特征在于，所述刷头包括有一个框架，所述框架带有上端敞开下端封闭的U形槽口，所述槽口是可以包住牙齿两侧的槽口，在框架上至少设置有两个毛刷传动轴，两个毛刷传动轴分别在槽口两侧平行于槽口延长方向设置，刷柄中的驱动转轴通过在槽口端部设置的转动接口带动毛刷传动轴转动，毛刷传动轴带动毛刷围绕毛刷传动轴转动。
  2. 根据权利要求1所述的牙齿清洁工具，其特征在于，所述刷柄和刷头是两个独立的部件，所述刷头在转动接口处通过卡扣与刷柄连接为一体。
  3. 根据权利要求1所述的牙齿清洁工具，其特征在于，所述毛刷环绕设置固定在毛刷传动轴上，所述转动接口包括主动齿轮和转向齿轮，主动齿轮用于与驱动转轴连接，毛刷传动轴上带有传动齿轮，转向齿轮与传动齿轮啮合带动槽口两侧的毛刷转轴旋转。
  4. 根据权利要求3所述的牙齿清洁工具，其特征在于，所述主动齿轮与转向齿轮的组合带动槽口两侧的毛刷转轴旋转是毛刷转轴分别向相反的方向旋转。
  5. 根据权利要求1所述的牙齿清洁工具，其特征在于，所述毛刷传动轴有三个，其中两个毛刷传动轴分别在槽口两侧平行于槽口延长方向设置，其中一个毛刷传动轴在槽口底端平行于槽口延长方向设置。
  6. 根据权利要求1所述的牙齿清洁工具，其特征在于，所述毛刷是一个环形毛刷带，所述毛刷传动轴有四个，分别在槽口两侧平行于槽口长度方向上下设置，环形毛刷带套在四个毛刷传动轴的外侧，其中至少有一个毛刷传动轴上带有传动齿轮，所述转动接口包括主动齿轮和转向齿轮，主动齿轮用于与驱动转轴连接，转向齿轮与传动齿轮啮合带动毛刷转轴旋转。
  7. 根据权利要求6所述的牙齿清洁工具，其特征在于，所述环形毛刷带的基带为弹性橡胶，当所述槽口插入牙齿时，环形毛刷带自动形成凹槽。
  8. 根据权利要求6所述的牙齿清洁工具，其特征在于，在所述槽口的封闭侧设置有至少两个压条，压条压在环形毛刷带上，使环形毛刷带形成一个可以插入牙齿的凹槽。
  9. 根据权利要求6所述的牙齿清洁工具，其特征在于，所述带有传动齿轮毛刷传动轴的轴面是橡胶面，不带有传动齿轮毛刷传动轴的轴面是塑料光面，所述环 形毛刷带的基带内侧与毛刷传动轴接触面是麻面。
  10. 根据权利要求6所述的牙齿清洁工具，其特征在于，所述带有传动齿轮毛刷传动轴的轴面是带凸起齿的齿形面，不带有传动齿轮毛刷传动轴的轴面是塑料光面，所述环形毛刷带的基带设置有与齿形面齿相啮合的齿孔。
  11. 根据权利要求1所述的牙齿清洁工具，其特征在于，所述毛刷传动轴通过卡槽嵌入到刷头上，可进行单独更换。
  12. 根据权利要求1所述的牙齿清洁工具，其特征在于，所述毛刷环绕设置固定在两个毛刷传动轴相对的侧面，所述转动接口带动毛刷传动轴的转动是小于二分之一圆周的来回摆动转动。
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