Retro-reflection device

Abstract

The invention relates to a light-reflecting warning device, in particular to a reflex reflector. The reflex reflector comprises a euphotic layer and a reflecting layer, wherein the reflecting layer is formed by corner cube prisms with a 0.2-degree observation angle which are arranged in arrays, the corner cube prisms form a 0.2-degree included angle between refracted rays refracted from the euphotic layer and the incident rays before entering the euphotic layer, corner cube prisms with a 1.5-degree observation angle are also distributed in the corner cube prism arrays to form a 1.5-degree included angle between the refracted rays refracted from the euphotic layer and the incident rays before entering the euphotic layer, and the included angle of two adjacent reflecting surfaces of the corner cube prisms with a 1.5-degree observation angle is 88.15 to 88.75 DEG. The reflex reflector is reasonable in structural design. The mould of the reflex reflector can be processed simply without pressing concave ribs on the surface of a mould cavity and damaging the mould. All observation angles meet the requirements for compulsory-standard light intensity. And the possibility that a user is impacted is reduced.

Description

technical field [0001] The invention relates to a reflective warning device, in particular to a retro-reflector. Background technique [0002] Plastic retro-reflectors are mainly used in traffic safety warning signs such as bicycles, motorcycles, automobile rear lights and highways. Existing retro-reflectors are all injection molded by high-precision molds. A qualified retro-reflector requires light The refracted light refracted by the retro-reflector must meet the mandatory standard when the observation angle (the angle between the incident light and the refracted light) is 0.2 degrees and 1.5 degrees (or 0.333 degrees and 1.5 degrees). The existing retro-reflection The light refracted by the incident light through the retro-reflector satisfies the reflection intensity in the range of 0.2 degrees (or 0.333 degrees) at the observation angle. Secondary refraction is achieved by reflecting back at a small reflection angle. [0003] As for the refracted light reflected by the...

AI Technical Summary

Problems solved by technology

However, the convex ribs on the surface of the product will reduce the reflective intensity required by the standard at an observation angle of 0.2 degrees or 0.333 degrees, and at the same time affect the appearance of the product and because the mold is relatively hard during the process of embossing the concave ribs, the punch for embossing the concave ribs is harder. , the hard material is relatively brittle, and the concave rib is relatively small, so the punch in the process of pressing the concave rib is easy to break and damage the mold. Another major disadvantage is that after the convex rib is formed in the light-transmitting layer of the retro-reflector, the cross-section of the convex rib is Isosceles triangle, no matter how it is placed, it has a certain direction. When installing the retro-reflector, there are strict requirements on the installation position of the convex edge, so that the refracted light can only be observed at an angle of 1.5 degrees. For users, this It is ignorant, so even if there is a retro-reflector installed on the product, there will be no reflective effect due to installation errors, which is very unsafe for users. This point is more prominent for disc-shaped retro-reflectors. Therefore, the current European ECE standard requires that the circular retro-reflector requires 360-degree rotation and any angle to meet the reflection requirements of the standard 1.5-degree observation angle, so that the reflection requirements with an observation angle of 1.5 degrees will pass through the pressure belt with directional ribs. Difficulty meeting the requirements of this spin test

Images