ASTM F404-07 关于tray 的锁定装置的不可见定义讨论。
在ASTM F404-07 6.11.3.3中后半段对锁定装置的不可见作了如下定义：A tray latch release mechanism is considered not visible to the occupant if the latch is flush to or recessed back from the plane perpendicular to the outer edge of the tray in the area of the tray latch release mechanism.
它就是说呢，如果tray 的锁定装置与垂直于tray 的（锁定装置附近的）边缘平面齐平或比它更凹陷进去的话，这样的锁定装置被认为坐在椅子内的小孩子是看不到的。（讲解起来比较困难）
当中的那个垂直tray边缘的平面是不是有点难理解呢？
各位有何高见，欢迎大家发言！谢谢！ 锁定装置与垂直于tray 边缘平面齐平或比它更凹陷进去 问题是那个与tray的边缘垂直平面怎么定是不是没说清楚呢？
若以除了锁定装置以外的最突出tray 的下表面的部份确定这个平面合理吗？
大家有何高见？ 简单说就是最侧边的零件不能是锁定装置,如果是则至少需要大于15LBF*10S的力才能打开它 楼上的兄弟：
对于我所提及的锁定装置的要求是：1、不可见（对坐在椅子内的小孩而言）2、开锁的施力方向与移开tray的方向的平面（一个竖直平面）成至少85度角。
根本没有你所说的15lbs力的要求！！！！！！！
我是想大家讨论下不可见的定义怎么理解？
谢谢！
A tray latch release mechanism is considered not visible to the occupant if the latch is flush to or recessed back from the plane perpendicular to the outer edge of the tray in the area of the tray latch release mechanism. 6.11.3 Tray latch release mechanisms located at the side of a tray shall comply with 6.11.3.1, 6.11.3.2, or 6.11.3.3.
6.11.3.1 For single action tray latch release mechanisms, the tray shall not be completely removed from the high chair in any latching position when tested in accordance with 9.14. A change in the adjustment position of the tray is allowed provided that the tray cannot be removed from the high chair.
6.11.3.2 Tray latch release mechanisms shall have a double action release mechanism.
6.11.3.3 Tray latch release mechanism shall not be visible to the occupant and the direction of release mechanism must be no less than 85° from the direction of tray release or removal. Visibility is to be determined when the seat is in the upright position and tray is in any manufacturer’s use position. A tray latch release mechanism is considered not visible to the occupant if the latch is flush to or recessed back from the plane perpendicular to the outer edge of the tray in the area of the tray latch release mechanism.
F4046.11.3中讲到,6.11.3.1, 6.11.3.2, or 6.11.3.3.的关系的并列的,只要符合其中之一就可以:
6.11.3.1 .释锁力达到15LBF
6.11.3.2 .双重动作释锁
6.11.3.3.在不可见的条件下,还要满足釋鎖機構的方向與餐盤釋鎖或移除方向之夾角不可小於85° 引用第5楼beavercool于2008-12-14 21:25发表的:
6.11.3 Tray latch release mechanisms located at the side of a tray shall comply with 6.11.3.1, 6.11.3.2, or 6.11.3.3.
6.11.3.1 For single action tray latch release mechanisms, the tray shall not be completely removed from the high chair in any latching position when tested in accordance with 9.14. A change in the adjustment position of the tray is allowed provided that the tray cannot be removed from the high chair.
6.11.3.2 Tray latch release mechanisms shall have a double action release mechanism.
6.11.3.3 Tray latch release mechanism shall not be visible to the occupant and the direction of release mechanism must be no less than 85° from the direction of tray release or removal. Visibility is to be determined when the seat is in the upright position and tray is in any manufacturer’s use position. A tray latch release mechanism is considered not visible to the occupant if the latch is flush to or recessed back from the plane perpendicular to the outer edge of the tray in the area of the tray latch release mechanism.
.......
不好意思，5楼的！
我只想知道什么才是不可见？
按它的定义需要一些理解，想知道大侠们的理解！谢谢！ 一楼的讲的很清楚了
锁定装置与垂直于tray 边缘平面齐平或比它更凹陷进去的才能视为不可见
如果有很难判断的,你发个照片看看 引用第1楼DOCTORO于2008-12-10 23:31发表的:
锁定装置与垂直于tray 边缘平面齐平或比它更凹陷进去
各位大侠：我的意思是与tray边缘垂直的平面是不是不好确定呢？是不是一个贴住tray的最下表面的与tray 边缘垂直的平面呢？
劳烦各位！谢谢！
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