CN104566192A - 具有防雾功能的车灯灯罩及其制造方法 - Google Patents
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Abstract
本发明公开一种具有防雾功能的车灯灯罩及其制造方法，在灯罩本体的内表面上紧密附有一层透明导电薄膜，透明导电薄膜的内表面上紧密附有一层透明疏水薄膜；透明导电薄膜是掺杂重量比为5%铝元素的氧化锌薄膜，透明疏水薄膜是二氧化硅薄膜；灯罩本体一侧固定设置一电源接口，透明导电薄膜通过该电源接口与车载电源相接，车载电源为透明导电薄膜供电；二氧化硅透明疏水薄膜具有良好的超疏水性能，一方面可以有效阻止雾滴在灯罩内表面凝结形成，另一方面可以有效隔离透明导电薄膜与车灯内环境的电接触；采用的透明导电薄膜是一种既可以导电加热又具有高的透光率的薄膜，有效防止车灯起雾。
Description
技术领域
本发明涉及的一种汽车车灯，具体涉及的是具有防雾功能的车灯的灯罩结构及其制造方法。
背景技术
车灯是汽车的重要配件之一，由灯罩、灯泡、反光镜等组成。随着现代设计、制造、工艺技术日益完善，车灯的质量和性能得到了很大的改善。但到目前为止，车灯起雾的问题一直没有解决，这一问题不仅影响着车灯的寿命和外观，而且还使车灯的照明效果明显降低，严重影响夜间行车安全。
车灯起雾原理是车灯内水蒸气在车灯内形成温度差时，在灯罩的死角区域形成的。车灯起雾需要具备三个基本条件：一是，车灯内的空气中必须含有足够的水蒸气；二是，车灯内必须存在温度低于水蒸气凝结临界温度区域；三是车灯内部存在凝结核。针对灯起雾具备的这三个基本条件，目前有几种车灯防雾的措施，大致可以分为如下几种：1、优化通气孔的位置和数目，避免车灯内形成温度死角，从而降低雾滴形成的可能，但这种方法的弊端是遇到空气湿度较大环境时，车灯内水蒸气含量随之增大，反而加大车灯起雾的可能。2、优化车灯材料，减少车灯内凝结核，从而降低雾滴形成的可能。3、优化车灯用胶，增强车灯的密封效果，防止水进入车灯内，这种方法不能从根本上解决车灯起雾。4、密封车灯，使车灯内真空化，这种方法实施起来有一点难度。5、放置干燥剂来降低车灯内水蒸气含量，从而降低车灯起雾的可能，但是这种方法的弊端是干燥剂有一定的使用寿命，需要定期更换。
由于车灯起雾主要是在灯罩的死角处形成的，然而目前的车灯防雾化方法中，并没有从灯罩上来防止车灯起雾。
发明内容
本发明是鉴于现有技术存在的不足，提出一种简单易行的具有防雾功能的车灯灯罩结构及其制造方法，在空气湿度较大环境时也能避免车灯内起雾。
为了实现上述目的，本发明具有防雾功能的车灯灯罩所采用的技术方案：包括灯罩本体，灯罩本体的内表面上紧密附有一层透明导电薄膜，透明导电薄膜的内表面上紧密附有一层透明疏水薄膜；透明导电薄膜是掺杂重量比为5%铝元素的氧化锌薄膜，透明疏水薄膜是二氧化硅薄膜；灯罩本体一侧固定设置一电源接口，透明导电薄膜通过该电源接口与车载电源相接，车载电源为透明导电薄膜供电。
本发明具有防雾功能的车灯灯罩的制造方法所采用的技术方案：包括以下步骤：
A、在灯罩本体一侧设计电源接口；
B、选取掺杂重量比为5%铝元素的氧化锌靶材，对靶材洁净处理后放入溅射室内，将灯罩本体也放入溅射室内；利用机械泵和分子泵将溅射室抽真空至0.76mPa，将纯度为99.9%的氧气和氩气通入溅射室内，在灯罩本体内表面上溅射一层氧化锌薄膜；在氧化锌薄膜上接电源线，将电源线由电源接口引出；
C、选取纯二氧化硅靶材，对二氧化硅靶材洁净处理后放入溅射室内，将具有有氧化锌薄膜的灯罩本体放入溅射室内，溅射一层二氧化硅薄膜。
本发明的有益效果：
1、本发明采用的二氧化硅透明疏水薄膜，具有良好的超疏水性能，雾滴不容易附着在该薄膜的表面，一方面可以有效阻止雾滴在灯罩内表面凝结形成，另一方面二氧化硅薄膜不导电，可以有效隔离透明导电薄膜与车灯内环境的电接触。
2、本发明采用的透明导电薄膜，是一种既可以导电加热又具有高的透光率的薄膜，即使有少量雾滴在灯罩内表明形成，通过这层透明导电薄膜的导电加热，迅速可以使其汽化，有效防止车灯起雾。通过掺杂铝元素，可以提高薄膜的透光率。
3、本发明车灯灯罩结构简单，制造方法易行，在任何环境中都可以避免车灯内形成温度死角，使用寿命长，无需定期更换。
附图说明
图1是本发明具有防雾功能的车灯灯罩的安装使用状态图；
图2是图1中本发明具有防雾功能的车灯灯罩的放大的俯视图；
图中：1.后盖；2.反光镜；3.灯泡；4.灯罩；5.电源接口；6.灯罩本体；7.透明导电薄膜；8.透明疏水薄膜。
具体实施方式
参见图1，车灯一般都包括后盖、灯罩4、反光镜2以及灯泡3，后盖（图中未示出）和灯罩4形成密闭的空腔，反光镜2和灯泡3被密封在空腔内，灯泡3发出的光通过反光镜2反射至灯罩4。
再参见图2，灯罩4由灯罩本体6、电源接口5、透明导电薄膜7和透明疏水薄膜8组成，灯罩4的最外层是灯罩本体6，在灯罩本体6的内表面上紧密附着一层透明导电薄膜7，在透明导电薄膜7的内表面上紧密附着一层透明疏水薄膜8。在灯罩本体6一侧固定一电源接口5，透明导电薄膜7通过该电源接口5与车载电源相接，通过车载电源为透明导电薄膜7供电。
透明导电薄膜7的厚度为100nm~1000nm。透明导电薄膜7是一种既能导电又在可见光范围内具有高透明率的一种薄膜，主要有金属膜系、氧化物膜系、其他化合物膜系、高分子膜系、复合膜系等。掺杂铝元素的氧化锌薄膜是很好的透明导电薄膜，当薄膜表面有少量雾滴形成，可以通过透明导电薄膜7的通电加热，使雾滴迅速气化。因此本发明的透明导电薄膜7采用的是掺杂重量比为5%铝元素的氧化锌薄膜。
透明疏水薄膜8的厚度为100nm~1000nm。透明疏水薄膜8采用透明超疏水的二氧化硅薄膜，不仅硬度高、耐磨性好、光透率高，而且还是很好的不导电的超疏水薄膜，雾滴不容易在其表面附着。
本发明具有防雾功能的车灯灯罩可以规模化生产制造，透明导电薄膜7和透明疏水薄膜8都是通过磁控溅射法生成。具体是：
首先，设计灯罩本体6。灯罩本体6材料为PC，厚度为5mm，本发明灯罩本体6与普通灯罩不同之处在于设计有电源接口5，其他技术参数基本和普通灯罩相符。
然后，对灯罩本体6做镀膜前期处理。先对灯罩本体6的内表面进行光滑处理，然后采用乙醇超声作洁净处理。
再对前期处理后的灯罩本体6利用磁控溅射法在其内表面上镀一层透明导电薄膜7。选取掺杂重量比为5%铝元素的氧化锌靶材，对靶材洁净处理后，放入溅射室内；将灯罩本体6放入溅射室内；溅射前利用机械泵和分子泵将溅射室抽真空至0.76mPa，然后将纯度为99.9%的氧气和氩气通入溅射室；在溅射过程中，衬底灯罩本体6温度为20℃，溅射功率控制在80w以内，溅射时间为35min，溅射得到厚度为100nm~1000nm的掺杂5%铝元素的氧化锌薄膜。
在氧化锌薄膜上靠近电源接口5的一侧固定焊接电源线，将该电源线由电源接口5引出，方便接入车载电源。
最后，利用磁控溅射法在氧化锌薄膜内表面镀上一层透明疏水薄膜8。选取的靶材是纯二氧化硅靶材，对靶材洁净处理后放入溅射室内；将镀有氧化锌薄膜的灯罩本体6放入溅射室内，溅射前利用机械泵和分子泵将溅射室抽真空至0.76mPa，然后将纯度为99.9%的氧气和氩气通入溅射室，在溅射过程中，衬底灯罩本体6温度为20℃，溅射功率控制在80w以内，溅射时间为35min，溅射得到厚度为100nm~1000nm的二氧化硅薄膜。
Claims (5)
1.一种具有防雾功能的车灯灯罩，包括灯罩本体（6），其特征是：灯罩本体（6）的内表面上紧密附有一层透明导电薄膜（7），透明导电薄膜（7）的内表面上紧密附有一层透明疏水薄膜（8）；透明导电薄膜（7）是掺杂重量比为5%铝元素的氧化锌薄膜，透明疏水薄膜（8）是二氧化硅薄膜；灯罩本体（6）一侧固定设置一电源接口（5），透明导电薄膜（7）通过该电源接口（5）与车载电源相接，车载电源为透明导电薄膜（7）供电。
2.根据权利要求1所述车灯灯罩，其特征是：所述透明导电薄膜（7）和透明疏水薄膜（8）的厚度均为100nm~1000nm。
3.一种如权利要求1所述车灯灯罩的制造方法，其特征是包括以下步骤：
A、在灯罩本体（6）一侧设计电源接口（5）；
B、选取掺杂重量比为5%铝元素的氧化锌靶材，对靶材洁净处理后放入溅射室内，将灯罩本体（6）也放入溅射室内；利用机械泵和分子泵将溅射室抽真空至0.76mPa，将纯度为99.9%的氧气和氩气通入溅射室内，在灯罩本体（6）内表面上溅射一层氧化锌薄膜；在氧化锌薄膜上接电源线，将电源线由电源接口（5）引出；
C、选取纯二氧化硅靶材，对二氧化硅靶材洁净处理后放入溅射室内，将具有有氧化锌薄膜的灯罩本体（6）放入溅射室内，溅射一层二氧化硅薄膜。
4.根据权利要求3所述车灯灯罩的制造方法，其特征是：步骤B和C的溅射过程中，灯罩本体（6）的温度为20℃，溅射功率控制在80w以内，溅射时间为35min。
5. 根据权利要求3所述车灯灯罩的制造方法，其特征是：步骤A中，先对灯罩本体（6）的内表面进行光滑处理，然后采用乙醇超声作洁净处理。
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| CN106633750A (zh) * | 2015-11-02 | 2017-05-10 | 丹阳市米可汽车零部件厂 | 一种车灯灯罩的制造方法 |
| CN108954222A (zh) * | 2018-05-25 | 2018-12-07 | 李超业 | 一种具有加热溶冰除雪除雾功能的灯具 |
| CN109323213A (zh) * | 2018-11-07 | 2019-02-12 | 华域视觉科技(上海)有限公司 | 防起雾车灯配光镜 |
| CN111189036A (zh) * | 2018-11-15 | 2020-05-22 | 堤维西交通工业股份有限公司 | 能发热融冰的灯壳装置 |
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| CN106633750A (zh) * | 2015-11-02 | 2017-05-10 | 丹阳市米可汽车零部件厂 | 一种车灯灯罩的制造方法 |
| CN108954222A (zh) * | 2018-05-25 | 2018-12-07 | 李超业 | 一种具有加热溶冰除雪除雾功能的灯具 |
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