WO2016082256A1 - 一种封口夹 - Google Patents

一种封口夹 Download PDF

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Publication number
WO2016082256A1
WO2016082256A1 PCT/CN2014/093742 CN2014093742W WO2016082256A1 WO 2016082256 A1 WO2016082256 A1 WO 2016082256A1 CN 2014093742 W CN2014093742 W CN 2014093742W WO 2016082256 A1 WO2016082256 A1 WO 2016082256A1
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WO
WIPO (PCT)
Prior art keywords
rolling
groove
sealing
clip
rolling mechanisms
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PCT/CN2014/093742
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English (en)
French (fr)
Inventor
李德玮
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李德玮
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Application filed by 李德玮 filed Critical 李德玮
Publication of WO2016082256A1 publication Critical patent/WO2016082256A1/zh

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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/26—Sliders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners

Definitions

  • the utility model relates to a sealing device for a bag, in particular to a sealing clip of a similar structure such as a vacuum compression bag or a stationery bag.
  • the vacuum clips or other stationery bags in the market have been sealed in a conventional manner, that is, a simple plastic clip consisting of two symmetrical plastic sheets with grooves inside, when vacuum compression is required.
  • a simple plastic clip consisting of two symmetrical plastic sheets with grooves inside
  • the sealing clip needs to be pressed with a certain force to cause the sealing. It is not easy, and if the force is uneven during sealing, it is easy to cause poor sealing performance. It is necessary to use the sealing clip back and forth many times. To some extent, there is excessive force, which causes the plastic film around the zipper such as vacuum compression bag or stationery bag to rupture. The service life is short.
  • more and more bags are beginning to adopt two or more sealing strips and sealing zippers, and the traditional sealing clips are particularly difficult to meet the needs of these types of bags.
  • the utility model aims to provide a sealing clip, which can effectively improve the practical utility of the existing zipper seal of a similar vacuum compression bag or a stationery bag, and overcome the defects that the existing zipper sealing clip is difficult to operate, low in efficiency and laborious.
  • the structure is reasonable and easy to use.
  • the solution of the present invention is:
  • a sealing clip includes a sealing clip body, and the sealing clip body includes symmetrically disposed upper and lower clips, and at least one groove is respectively formed on the mating surface of the upper and lower clips, and the recess is At least one rolling mechanism is mounted, respectively, and the spacing between the rolling mechanisms is not greater than the spacing of the opposing faces of the upper and lower jaws to assist in sealing the desired closed bag.
  • the axes of the rolling mechanisms installed in the respective grooves are the same straight line or parallel to each other.
  • the rolling mechanism includes a roller and an axle for mounting the roller, and two sidewalls of the groove are provided with small holes corresponding to the axle, and the axle is snap-fitted in the small hole.
  • the rolling mechanism includes at least one ball that is fitted in the groove to roll in the groove.
  • the rolling mechanism protrudes from a plane in which the upper and lower clips face each other; preferably, the rolling mechanism protrudes from a plane in which the upper and lower clip faces are 1.0 mm to 3.0 mm; Alternatively, preferably, the spacing between the rolling mechanisms is 2.0 mm to 5.0 mm.
  • the axes of the sets of rolling mechanisms installed in the groove are the same straight line, and at least one set of rolling mechanisms are installed in each groove, and each group of rolling mechanisms can respectively roll in each groove to use different sets of rolling mechanisms. Simultaneously pressing different positions of the upper and lower orientations on the sealed bag seal;
  • the opposing faces of the upper and lower clips respectively have two grooves, and at least one set of rolling mechanisms are installed in each groove, and each group of rolling mechanisms can respectively roll in each groove to use different groups.
  • the rolling mechanism simultaneously presses the upper and lower positions on the sealed bag seal.
  • Each set of rolling mechanisms provided in each of the grooves has axes that are parallel to each other and of the same level so as to be sequentially pressed using the different sets of rolling mechanisms for the same position on the bag seal to be sealed.
  • the upper surface of the upper clip and the lower clip are respectively provided with a frictional pattern which helps to increase the frictional force of holding and pressing during use; preferably, the frictional pattern is a plurality of fine grooves parallel to each other.
  • the sealing clip body has a longitudinal cross section of V or U shape.
  • the sealing clip body and the rolling mechanism are made of plastic or metal material; the plastic is preferably an engineering plastic, and more preferably, polypropylene is used.
  • the sealing clip of the present invention can be obtained by separately manufacturing each component part and component, and can also be obtained by one-time processing as a whole.
  • the utility model has the beneficial effects that the sealing clip shown in the utility model has a rolling mechanism mounted on the opposing surface of the upper and lower clips, and when it is necessary to seal the vacuum compression bag, etc., The hand presses gently, and the sealing clip slides from one end to the other end. Due to the addition of the rolling mechanism, the rolling mechanism can reduce the internal resistance during the sliding process, and provide new pressure to the sealing portion of the compression bag, so that the pressure is balanced. Therefore, the zipper seal has better sealing performance, saves time and labor, and further improves the service life of the sealing clip; on the other hand, the sealing clip can effectively reduce the friction damage to the closed bag, thereby increasing the number of times the bag is used. It has a more significant energy saving and environmental protection effect.
  • FIG. 1 is a longitudinal view of an embodiment of a U-shaped sealing clip body in which only one groove is formed on the opposing faces of the upper and lower clips of the present invention.
  • Figure 2 is a left side elevational view of the embodiment of Figure 1.
  • Figure 3 is a plan view of the embodiment of Figure 1.
  • FIG. 4 is a longitudinal view of an embodiment of a V-shaped sealing clip body in which two recesses are respectively formed on the abutting faces of the upper and lower clips of the present invention.
  • Figure 5 is a left side elevational view of the embodiment of Figure 4.
  • Figure 6 is a plan view of the embodiment of Figure 4.
  • Fig. 7 is a longitudinal cross-sectional view showing an embodiment of a U-shaped sealing clip body in which two recesses are respectively formed on the abutting faces of the upper and lower clips of the present invention.
  • Figures 1, 2, 4, 5 and 7 incorporate a cross-sectional view of the contour lines of some of the component parts that are obscured at this viewing angle. Also draw at the same time.
  • a sealing clip includes a sealing clip body 3.
  • the sealing clip body 3 includes a symmetrically disposed upper clip 1 and a lower clip 2, and upper surfaces of the upper clip 1 and the lower clip 2 are respectively disposed.
  • the upper surface of the upper clip 1 and the lower clip 2 respectively have an upper groove 13 and a lower groove 23, and the upper groove 13 is mounted with at least one upper rolling mechanism 12, and at least the lower groove 23 is mounted.
  • a set of lower rolling mechanisms 22, the upper rolling mechanism 12 and the lower rolling mechanism 22 are respectively rotatable in the upper groove 11 and the lower groove 21, and the spacing between the rolling mechanisms is not greater than the upper clip 1 and the lower clip 2
  • the spacing of the mating faces to assist in the sealing of the bag that needs to be sealed, such as a vacuum bag.
  • the rolling mechanism adopts a roller-axle structure, that is, the upper rolling mechanism in the upper clip 1 includes an upper axle 14 and an upper roller 12 mounted thereon, and the lower rolling mechanism in the lower clamp 2 includes a lower axle 24 and is mounted on The upper roller 22; the upper side of the upper groove 13 and the lower groove 23 are respectively provided with small holes corresponding to the upper wheel shaft 14 and the lower wheel shaft 24 (not shown in the drawings), the upper wheel shaft 14 and the lower wheel shaft 24 are respectively clamped in the small holes.
  • the upper wheel shaft 14 and the lower wheel shaft 24 respectively penetrate the upper roller 12 and the lower roller 22, and the two sides of the upper wheel shaft 14 and the lower wheel shaft 24 are respectively caught in the small holes of the upper groove 13 and the lower groove 23 by manual pressing or other means. , thereby completing the installation of the rolling mechanism on the sealing clip.
  • FIG. 4-6 a sealing clip, on the basis of the structure of the embodiment shown in FIG. 1-3, the upper clip 1 and the lower clip 2
  • the second upper groove 16 and the second lower groove 26 are respectively corresponding to the opposite surfaces, and at least one set of the second upper rolling mechanism 15 is installed in the second upper groove 16, and the second lower groove 26 is installed.
  • second lower rolling mechanisms 25 There are at least one set of second lower rolling mechanisms 25, and the second upper rolling mechanism 15 and the second lower rolling mechanism 25 are respectively at the second upper groove 16 And rolling in the second lower groove 26, and the spacing between the rolling mechanisms is not greater than the spacing of the opposing faces of the upper and lower jaws 1 and 2 to assist in sealing the bag that needs to be sealed, such as a vacuum bag.
  • the second rolling mechanism adopts a roller-axle structure, that is, the second upper rolling mechanism in the upper clip 1 includes a second upper axle 17 and a second upper roller 15 mounted thereon, and a second of the lower clamps 2
  • the lower rolling mechanism includes a second lower axle 27 and a second lower roller 25 mounted thereon; the two upper sidewalls of the second upper recess 16 and the second lower recess 26 correspond to the second upper axle 14 and the second lower axle 24
  • the small holes are respectively opened (not shown in the figure), and the second upper axle 17 and the second lower axle 27 are snap-fitted in the small holes.
  • the second upper axle 17 and the second lower axle 27 respectively penetrate the second upper roller 15 and the second lower roller 25, and the two sides of the second upper axle 17 and the second lower axle 27 are respectively engaged by the manual pressing or other means.
  • the upper groove 16 and the second lower groove 26 are in the small holes, thereby completing the installation of the rolling mechanism on the sealing clip.
  • the sealing clip By using the sealing clip, the upper and lower positions of the upper and lower seals of the bag can be simultaneously pressed and sealed.
  • the axes of the rolling mechanisms mounted in the upper groove 13 and the second upper groove 16 are the same straight line; the rolling is installed in the lower groove 23 and the second lower groove 26.
  • the axes of the mechanisms are the same straight line; in fact, the axes of the rolling mechanisms in the grooves of the upper clip may also be parallel lines; the axes of the rolling mechanisms in the grooves of the lower clip are also It can be a straight line parallel to each other.
  • the size of the second rolling mechanism protruding from the plane in which the opposing faces of the upper clip 1 and the lower clip 2 are located may be different from the plane in which the first rolling mechanism is opposite to the facing surface of the upper clip 1 and the lower clip 2 Dimensions; similarly, the spacing between the rollers and the rollers in the second rolling mechanism may be different from the spacing between the rollers and the rollers in the first rolling mechanism.
  • the embodiment shown in Fig. 7 differs from the embodiment shown in Figs. 4-6 in the shape of the longitudinal section of the sealing clip body 3 connecting the upper clip 1 and the lower clip 2, and the sealing in the embodiment shown in Fig. 7.
  • the longitudinal section of the clip body 3 is U-shaped
  • the longitudinal section of the closure clip body 3 in the embodiment shown in Figures 4-6 is U-shaped.
  • the rolling mechanism in the embodiment shown in Figures 1-7 is a roller-axle structure.
  • a ball structure can also be used, that is, only the balls fixed in position are installed in the upper and lower grooves, and when the upper and lower clips are closed, the upper and lower grooves are opposite. When the upper and lower balls can be right The bag seal placed between the two is pressed to achieve the same effect of sealing.
  • the rolling mechanism is arranged with a certain size relative to the plane where the opposing faces of the upper clip 1 and the lower clip 2 are located, that is, the rolling mechanism protrudes from the plane where the facing surface is 1.0 mm to 3.0 mm, so that the setting can fully utilize the roller to reach Pressing the sealing effect, at the same time, the spacing between the oppositely disposed rollers is 2.0 mm to 5.0 mm, so that there is sufficient clearance to clamp the bag to be sealed without excessive gaps, and the sealing effect is not good.
  • the material of the sealing clip body and the rolling mechanism may be made of plastic or metal material, and the plastic is preferably engineering plastic; the same material may be used for each component, or different materials may be used.
  • the upper clip 1, the lower clip 2, the sealing clip body 3 and the roller are made of polypropylene (PP), and the material of the axle and the ball is also made of polypropylene (PP).
  • the seal to be sealed is placed between the rolling mechanisms of the sealing clip, that is, between the rollers or the balls, while sliding the sealing clip shown in the utility model while gently Pressing, so that the sealing clip slides from one end of the compression bag to the other end, since the rolling mechanism is added in the groove of the sealing clip, the internal resistance can be greatly reduced during the sliding process, and the spacing between the rolling mechanisms is smaller than the matching surface The spacing can provide new pressure to the sealing strip at the opening, and at the same time, the sealing strip at the opening of the compression bag or the like is more evenly balanced, so that the sealing performance of the zipper seal is better and saves time and labor.
  • the bag to be sealed such as a vacuum compression bag or a stationery bag
  • the matching sealing clip is not large, and in the above embodiment, only one pair and two pairs of rolling mechanisms are shown to be sufficient. To the sealing effect.
  • more sets of rolling mechanisms can be set according to the specific use occasions of the sealing clip and the size of the model to achieve an effective sealing effect.
  • the values of the gaps or other dimensions described in the foregoing embodiments are only for a bag of a general size, if the bag to be sealed is large, thick or small, and thin, in the foregoing embodiment
  • the value of the gap or other dimensions should obviously be adaptively adjusted to meet the needs of use, and will not be described here.

Abstract

一种封口夹，包括具有对称设置的上夹片（1）和下夹片（2）的封口夹本体（3）。上夹片（1）和下夹片（2）的对合面上至少分别对应开设一个凹槽（13,23,16,26），凹槽（13,23,16,26）中分别安装有至少一个滚动机构（12,22,15,25）。滚动机构（12,22,15,25）之间的间距不大于上夹片（1）和下夹片（2）对合面的间距以协助密封夹合所需封闭的袋子。该封口夹能提高拉链封口的密封性能且省时省力，能增加封口夹和袋子的使用寿命。

Description

一种封口夹 技术领域
本实用新型涉及一种袋子的封口装置，特别是一种真空压缩袋或者文具袋等类似结构的封口夹。
背景技术
目前，市场中的真空袋或者其他文具袋等类似结构的封口夹一直采用传统简易的方式，即为一个简易塑料夹，由两片对称式塑料片组成，内有凹槽，当需要密封真空压缩袋时，将封口夹对准真空压缩袋或文具袋的拉链一端，拉行至另一端以起到压实封口作用，但是实际操作使用中，封口夹需用使用一定力压紧，而造成封口不易，且封口时若用力不均，易造成密封性能不佳，需多次来回使用封口夹，在一定程度上存在用力过猛，从而导致真空压缩袋或文具袋等拉链周围部分塑料膜的破裂，使用寿命较短。另外，有越来越多的袋子开始采用两道甚至更多道封口条、封口拉链，传统的封口夹尤其难以满足这些类型袋子的使用需求。
实用新型内容
本实用新型的目的在于提供一种封口夹，其能有效提高现有真空压缩袋或者文具袋等类似结构拉链封口的操作实用性，克服现有拉链封口夹不易操作、效率低且费力等缺陷，结构合理，使用方便。
为达到上述目的，本实用新型的解决方案是：
一种封口夹，包括封口夹本体，所述封口夹本体包括对称设置的上、下夹片，所述上、下夹片的对合面上至少分别对应开设一个凹槽，所述凹槽中分别安装有至少一滚动机构，所述滚动机构之间的间距不大于所述上、下夹片对合面的间距以协助密封夹合所需封闭的袋子。
所述各凹槽中安装的滚动机构的轴线为同一条直线或相互平行。
所述滚动机构包括滚轮以及用于安装所述滚轮的轮轴，所述凹槽两侧壁对应所述轮轴开有小孔，所述轮轴卡接设置在所述小孔中。
所述滚动机构包括至少一个滚珠，所述滚珠嵌合设置在所述凹槽中以在凹槽中滚动。
所述滚动机构突出所述上、下夹片对合面所在的平面设置；优选的，所述滚动机构突出所述上、下夹片对合面所在的平面的尺寸为1.0mm～3.0mm；或者，优选的，所述滚动机构之间的间距为2.0mm～5.0mm。
所述凹槽中所安装的各组滚动机构的轴线为同一条直线，各凹槽中安装有至少一组滚动机构，各组滚动机构可分别在各凹槽中滚动以便使用不同组的滚动机构对待密封的袋子封口上的上下方位的不同位置同时进行按压；
优选的，所述上、下夹片的对合面分别对应开设两个凹槽，各凹槽中安装有至少一组滚动机构，各组滚动机构可分别在各凹槽中滚动以便使用不同组的滚动机构对待密封的袋子封口上的上下位置同时进行按压。
各凹槽中所设置的各组滚动机构，它们的轴线相互平行，并且水平高度相同以便使用不同组的滚动机构对待密封的袋子封口上的同一位置先后进行按压。
所述上夹片、下夹片上表面分别设置有助于使用时增大握持、按压的摩擦力的摩擦纹；优选的，所述摩擦纹为若干道相互平行的细小的沟槽。
所述封口夹本体的纵向截面为V或U形。
所述封口夹本体、滚动机构的制作材料采用塑料或金属材料；所述塑料优选工程塑料，更优选的，采用聚丙烯。
本实用新型封口夹可以通过分别制作各组成部分、部件之后再组装到一起得到，也可以通过一次性加工制作为一个整体的方式得到。
由于采用上述方案，本实用新型的有益效果是：本实用新型所示的封口夹，其通过在上、下夹片的对合面上安装滚动机构，当需要密封真空压缩袋等时，只需人手轻轻按压，封口夹从一端滑行至另一端的过程中，由于增设滚动机构，滚动机构可降低滑行过程中内阻，对压缩袋等的封口处提供新的压力，使其均衡受力，从而使得拉链封口密封性能更佳、省时省力，此外，还提高了封口夹的使用寿命；另一方面，该封口夹能有效减少对所封闭的袋子的摩擦损伤，以提高袋子的使用次数，具有更加显著的节能环保的效果。
附图说明
图1为本实用新型的上、下夹片的对合面上只分别开设一个凹槽的采用U型封口夹本体的一实施例的纵向视图。
图2为图1所示实施例的左视图。
图3为图1所示实施例的俯视图。
图4为本实用新型的上、下夹片的对合面上分别开设两个凹槽的采用V型封口夹本体的一实施例的纵向视图。
图5为图4所示实施例的左视图。
图6为图4所示实施例的俯视图。
图7为本实用新型的上、下夹片的对合面上分别开设两个凹槽的采用U型封口夹本体的一实施例的纵向剖视图。
具体实施方式
以下结合附图所示实施例对本实用新型作进一步的说明。
为了能更好地展现出本实用新型及个组成部分的结构，图1、2、4、5和7中结合了剖视图的画法，将在该视角时被遮挡住的一些组成部件的轮廓线条也同时画出。
如图1-3所示，一种封口夹，包括封口夹本体3，封口夹本体3包括对称设置的上夹片1、下夹片2，上夹片1、下夹片2上表面分别设置有若干道相互平行的细小的沟槽；实际上，采用沟槽以外的摩擦纹结构形式也是可以的，只要能有助于使用时增大握持、按压的摩擦力以免滑出即可。
上夹片1和下夹片2的对合面上分别对应开设上凹槽13和下凹槽23，上凹槽13中安装有至少一组上滚动机构12，下凹槽23中安装有至少一组下滚动机构22，该上滚动机构12、下滚动机构22可分别在上凹槽11和下凹槽21中滚动，且滚动机构之间的间距不大于上夹片1和下夹片2对合面的间距以协助密封夹合需要进行密封的袋子，例如真空袋。
所述滚动机构采用滚轮-轮轴结构，即上夹片1中的上滚动机构包括上轮轴14以及安装在其上的上滚轮12，下夹片2中的下滚动机构包括下轮轴24以及安装在其上的下滚轮22；上凹槽13、下凹槽23的两侧壁对应上轮轴14、下轮轴24分别开有小孔(简明起见，图中未画出)，上轮轴14、下轮轴24分别卡接设置在小孔中。
上轮轴14、下轮轴24分别贯穿上滚轮12、下滚轮22，通过人工按压或其他方式，使上轮轴14、下轮轴24的两边分别卡在上凹槽13、下凹槽23的小孔内，从而完成滚动机构在封口夹上的安装。
在上述结构的基础上可以进一步得到以下的新结构：如图4-6所示，一种封口夹，在图1-3所示实施例的结构基础上，上夹片1和下夹片2的对合面上再分别对应开设第二上凹槽16和第二下凹槽26，第二上凹槽16中安装有至少一组第二上滚动机构15，第二下凹槽26中安装有至少一组第二下滚动机构25，该第二上滚动机构15、第二下滚动机构25可分别在第二上凹槽16 和第二下凹槽26中滚动，且滚动机构之间的间距不大于上夹片1和下夹片2对合面的间距以协助密封夹合需要进行密封的袋子，例如真空袋。
所述第二滚动机构采用滚轮-轮轴结构，即上夹片1中的第二上滚动机构包括第二上轮轴17以及安装在其上的第二上滚轮15，下夹片2中的第二下滚动机构包括第二下轮轴27以及安装在其上的第二下滚轮25；第二上凹槽16、第二下凹槽26的两侧壁对应第二上轮轴14、第二下轮轴24分别开有小孔(简明起见，图中未画出)，第二上轮轴17、第二下轮轴27卡接设置在小孔中。
第二上轮轴17、第二下轮轴27分别贯穿第二上滚轮15、第二下滚轮25，通过人工按压或其他方式，使第二上轮轴17、第二下轮轴27的两边分别卡在第二上凹槽16、第二下凹槽26的小孔内，从而完成滚动机构在封口夹上的安装。
使用该封口夹可以对袋子上封口处的上下不同的位置同时进行按压、封口。
显而易见，根据实际使用的需求，按照上述方式在上夹片和下夹片中继续增加出第三以及更多上凹槽和第三及更多下凹槽及滚动机构都是可以的。
图4-6所示实施例中，上凹槽13和第二上凹槽16中所安装的滚动机构的轴线为同一条直线；下凹槽23和第二下凹槽26中所安装的滚动机构的轴线为同一条直线；实际上，处于上夹片的各凹槽中的各滚动机构的轴线也可以为相互平行的直线；处于下夹片的各凹槽中的各滚动机构的轴线也可以为相互平行的直线。
换言之，第二滚动机构相对上夹片1和下夹片2对合面所在的平面突出的尺寸可以不同于第一滚动机构相对上夹片1和下夹片2对合面所在的平面突出的尺寸；同样的，第二滚动机构内滚轮与滚轮之间的间距可以不同于第一滚动机构内滚轮与滚轮之间的间距。
图7所示实施例与图4-6所示实施例不同之处在于将上夹片1、下夹片2连接起来的封口夹本体3的纵向截面的形状，图7所示实施例中封口夹本体3的纵向截面为U形，而图4-6所示实施例中封口夹本体3的纵向截面为U形。实际上，采用其它形状也是可以的，只要不影响使用时对上夹片1、下夹片2按压以密封置于其中的袋子封口即可。
图1-7所示实施例中的凹槽中分别都只安装了一组滚动机构；实际上，根据需要也可以设置多组滚动机构，它们的轴线相互平行，并且水平高度相同。换言之，在使用这种封口夹的情况下，待密封的袋子封口上的同一位置将先后被不同的滚动机构所按压，从而取得更好的密封效果。
图1-7所示实施例中的滚动机构为滚轮-轮轴结构，实际上也可以采用滚珠结构，即上下凹槽中都只安装位置固定的滚珠，并且当上下夹片闭合、上下凹槽相对时，上下滚珠可以对 放置在两者之间的袋子封口进行按压，同样实现密封的效果。
一般而言，滚动机构相对上夹片1和下夹片2对合面所在的平面突出一定尺寸设置，即滚动机构突出对合面所在的平面1.0mm～3.0mm，这样设置可以充分利用滚轮达到按压密封效果，同时，相对设置的滚轮之间的间距为2.0mm～5.0mm，以使得有足够的间隙可以夹住待密封袋的同时又不会因为间隙过大，避免密封效果不佳。
所述封口夹本体、滚动机构(包括滚轮、轮轴、滚珠等)的制作材料可以采用塑料或金属材料，塑料优选工程塑料；各部件可以使用相同的制作材料，也可以使用不同的制作材料。
优选的，例如：上夹片1、下夹片2、封口夹本体3及滚轮的制作材料选用聚丙烯(PP),轮轴、滚珠的制作材料也选用聚丙烯(PP)。
当需要密封袋子，例如真空压缩袋等结构时，将袋子待密封的封口置入封口夹的滚动机构之间，即滚轮或滚珠之间，在滑动本实用新型所示封口夹的同时人手轻轻按压，使得封口夹从压缩袋的一端滑行至另一端，由于在封口夹的凹槽内加入滚动机构，在滑移的过程中可大大降低内阻，且滚动机构之间的间距小于对合面的间距，可对开口处的密封条提供新的压力，同时，压缩袋等的开口处密封条受力也更均衡，从而使得拉链封口的密封性能更佳且省时省力。
考虑到待密封的袋子，例如真空压缩袋或者文具袋等类似结构通常不大，相配使用的的封口夹也不大，上述实施例中，只展现了设置一对和两对滚动机构即足以起到密封效果。当然，也可根据封口夹的具体使用场合以及型号大小，设置更多组滚动机构，以实现有效的密封作用。
另一方面，同样的，前述实施例中所述的间隙或其它尺寸的数值只是对于一般尺寸的袋子而言，如果待密封的袋子很大、很厚或很小、很薄，前述实施例中所述间隙或其它尺寸的数值显然应该进行适应性的调整以满足使用需求，此不赘述。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用本实用新型。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本实用新型不限于上述实施例，本领域技术人员根据本实用新型的揭示，不脱离本实用新型范畴所做出的改进和修改都应该在本实用新型的保护范围之内。

Claims (10)

  1. 一种封口夹，包括封口夹本体，所述封口夹本体包括对称设置的上、下夹片，其特征在于：所述上、下夹片的对合面上至少分别对应开设一个凹槽，所述凹槽中分别安装有至少一滚动机构，所述滚动机构之间的间距不大于所述上、下夹片对合面的间距以协助密封夹合所需封闭的袋子。
  2. 根据权利要求1所述的封口夹，其特征在于：所述各凹槽中安装的滚动机构的轴线为同一条直线或相互平行。
  3. 根据权利要求1所述的封口夹，其特征在于：所述滚动机构包括滚轮以及用于安装所述滚轮的轮轴，所述凹槽两侧壁对应所述轮轴开有小孔，所述轮轴卡接设置在所述小孔中。
  4. 根据权利要求1所述的封口夹，其特征在于：所述滚动机构包括至少一个滚珠，所述滚珠嵌合设置在所述凹槽中以在凹槽中滚动。
  5. 根据权利要求1所述的封口夹，其特征在于：所述滚动机构突出所述上、下夹片对合面所在的平面设置；优选的，所述滚动机构突出所述上、下夹片对合面所在的平面的尺寸为1.0mm～3.0mm；或者，优选的，所述滚动机构之间的间距为2.0mm～5.0mm。
  6. 根据权利要求1所述的封口夹，其特征在于：所述凹槽中所安装的各组滚动机构的轴线为同一条直线，各凹槽中安装有至少一组滚动机构，各组滚动机构可分别在各凹槽中滚动以便使用不同组的滚动机构对待密封的袋子封口上的上下方位的不同位置同时进行按压；
    优选的，所述上、下夹片的对合面分别对应开设两个凹槽，各凹槽中安装有至少一组滚动机构，各组滚动机构可分别在各凹槽中滚动以便使用不同组的滚动机构对待密封的袋子封口上的上下位置同时进行按压。
  7. 根据权利要求1所述的封口夹，其特征在于：各凹槽中所设置的各组滚动机构，它们的轴线相互平行，并且水平高度相同以便使用不同组的滚动机构对待密封的袋子封口上的同一位置先后进行按压。
  8. 根据权利要求1所述的封口夹，其特征在于：所述上夹片、下夹片上表面分别设置有助于使用时增大握持、按压的摩擦力的摩擦纹；优选的，所述摩擦纹为若干道相互平行的细小的沟槽。
  9. 根据权利要求1所述的封口夹，其特征在于：所述封口夹本体的纵向截面为V或U形。
  10. 根据权利要求1所述的封口夹，其特征在于：所述封口夹本体、滚动机构的制作材料采用塑料或金属材料；所述塑料优选工程塑料，更优选的，采用聚丙烯。
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