The invention discloses an improved structure of a lower cover plate of a double-layer tooth drawing head. The utility model aims to provide an improved structure of a double tooth pull head lower cover plate with good anti-theft performance, long service life and easy opening and closing when the pull head is turned. It is used for switching on the pull head two layers with the specifications of double chain, the pull head comprises an upper cover and a lower cover plate, the cover plate and the cover plate are respectively arranged on both sides of the upper plate and the lower side plate, between the left and right side plates between teeth end distance and around the lower side plate of teeth at the same distance, the heart base is connected between the upper cover and the lower cover, in the heart there will be a separate design based on the two layer separate chain guide plate, which is characterized in that the maximum width of the maximum width of the lower cover is less than the upper cover, the lower side plate length than the upper side guard plate of short length, under the the cover is in the shape of tapered end. The invention can avoid or reduce the bags over the bend of the taut and coated folds caused by an obstruction to pull the head opening easily.
【技术实现步骤摘要】
双层齿拉头下盖板结构的改良
本专利技术涉及拉链,更具体地说涉及双层齿拉头下盖板结构的改良。
技术介绍
通常双层齿拉链的拉头是其上下盖板的大小和形状是相同的,其形状为进入合齿位置的宽度大于完成合齿位置的宽度,并且前后端的宽度相差明显,只是上盖板两侧的上侧护板在上盖板的下表面上,下盖板两侧的下侧护板在下盖板的上表面上,并且上下侧护板的位置上下对应,长度相等,如图1至图3所示。为了解决当拉链的走向遇到上下转弯时,外层拉链的曲率比内层拉链的曲率大,尤其是在箱包上左右对合的盒体90度转弯处,内外两层的曲率相差就比较大,此时会产生外层齿在转弯处呈齿与齿间隙外张,而内层齿之间呈内缩互挤的状态。形成上、下层用一个同腔拉头合齿时会因上、下层合齿时的时间及形态空间不协调,而阻碍拉头的合齿滑动。加大拉头的合齿滑动阻力,同时造成上、下护板和缝束的快速磨损,上、下护板的张开和基心的弯曲或拉片的撕裂等现象,使得拉头和链带过早损坏。由此设计了专利号ZL201410007719.8一种双层齿拉链的拉头。它采用下盖板对应上盖板内缩一层齿厚度的距离的结构,改善了双层齿当弯曲角度拉滑时的过弯处的阻力。比起传统的拉头优越许多,但是箱包客户在其将拉链缝制于硬箱壳体或软箱弹性铁框包覆面料时,在拉头过弯处时,在缝合过弯中动作是旋转进行的,此现象通常会使拉链旋转而紧拉下车缝,以致箱包过弯处的拉链特别紧贴壳体或是包面料的铁框。此受紧拉的弯角部位又因内里布褶皱多波浪不平整,所以当拉链头拉滑经过弯角时,拉头下盖板的最宽处会碰触到缝合的里布褶皱(厚度不一致,不平整),而且此弯曲区段正是过弯拉紧状态的位置,因此在 ...
【技术保护点】
双层齿拉头下盖板结构的改良,它是用于开合上下两层同规格双层链带的拉头,该拉头包括有上盖板和下盖板,在上盖板和下盖板的两侧均分别设有上侧护板和下侧护板,左右上侧护板合齿端之间的距离与左右下侧护板合齿端之间的距离相同,在上盖板和下盖板之间通过基心连接,在基心上设计有将上下两层链带分开的分隔导片,其特征是下盖板的最大宽度小于上盖板的最大宽度,下侧护板的长度比上侧护板的长度短,下盖板后端的形状为锥形。
【技术特征摘要】
1.双层齿拉头下盖板结构的改良,它是用于开合上下两层同规格双层链带的拉头,该拉头包括有上盖板和下盖板,在上盖板和下盖板的两侧均分别设有上侧护板和下侧护板,左右上侧护板合齿端之间的距离与左右下侧护板合齿端之间的距离相同,在上盖板和下盖板之间通过基心连接,在基心上设计有将上下两层链带分开的分隔导片,其特征是下盖板的最大宽度小于上盖板的最大宽度,下侧护板的长度比上侧护板的长度短,下盖板后端的形状为锥形。2.根据权利...
【专利技术属性】
技术研发人员:王联洲,
申请(专利权)人:芊茂浙江拉链有限公司,
类型:发明
国别省市:浙江,33
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