CN103470984A - 发光元件灯以及照明设备 - Google Patents
发光元件灯以及照明设备 Download PDFInfo
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Abstract
本发明提供发光元件灯以及照明设备。所述发光元件灯具备:导热性的基板安装部,该基板安装部具有螺钉贯通孔;光源部,该光源部具有在一端侧安装有发光元件的基板,所述基板的另一端侧以热结合的方式安装于所述基板安装部的一端侧;导热性的罩,该导热性的罩在内部具有空间,并且在一端侧设有所述基板安装部;点灯电路,该点灯电路配置于所述导热性的罩的所述空间中;以及按压体,该按压体具有螺钉贯通部,经由所述螺钉贯通部和所述基板安装部的所述螺钉贯通孔将螺钉从一端侧拧入,由此以另一端侧按压所述基板的一端侧,将所述光源部固定于所述基板安装部。
Description
本申请是申请日为:2009年6月4日、申请号为:200980109318.0(PCT/JP2009/060256)、发明名称为“发光元件灯以及照明设备”的发明专利申请的分案申请。
技术领域
本发明涉及应用LED等发光元件作为光源的发光元件灯以及使用该发光元件灯的照明设备。
背景技术
对于LED等发光元件,随着温度上升,光输出下降且会对寿命造成影响。因此,在以LED或EL元件等固体发光元件作为光源的灯中,为了改善寿命、效率等诸特性,需要抑制发光元件的温度上升。以往,在这种LED灯中,为了高效地进行散热,公知有这样的技术:在配置有LED的基板与灯头之间具备圆柱形状的散热部,并将基板安装于该散热部的端面的周缘(例如参照专利文献1)。
专利文献1:日本特开2005-286267号公报
但是,专利文献1所示的灯作为散热对策而特意设置散热部,并且是仅在散热部的端面的周缘与基板接触的方式,换言之,散热部和基板只不过呈线状地接触,难以获得充分的散热效果。
发明内容
本发明就是鉴于上述课题而完成的,其目的在于提供能够利用导热性的壳和罩有效地抑制安装有发光元件的基板的温度上升的发光元件灯以及照明设备。
第一方面所记载的发光元件灯具备:导热性的壳,该导热性的壳具有照射开口部且形成为朝向该照射开口部扩开,并且,该导热性的壳的外周面在外侧露出,且该导热性的壳在内周面具备基板安装部;光源部,该光源部具有安装有发光元件的基板,该基板以热结合的方式安装于所述基板安装部;导热性的罩,该导热性的罩与所述导热性的壳的外周面以面接触状态热结合而连接;绝缘性的罩,该绝缘性的罩的一端侧与所述导热性的罩连接,且在该绝缘性的罩的另一端侧连接有灯头;以及点灯电路,该点灯电路被收纳于所述绝缘性的罩,用于对所述发光元件进行点灯控制。
所谓发光元件是指LED或有机EL等固体发光元件。发光元件的安装优选利用板上芯片封装方式或表面贴装方式安装,但是,在本发明的性质上,安装方式并无特殊限定,例如也可以使用炮弹型的LED安装于基板。并且,发光元件的配设个数并无格外限制。对于导热性的壳的朝向照射开口部的扩开,可以是连续地扩开的方式、也可以是阶段性地扩开、换言之为以不连续的形状扩开的方式。
对于第二方面所记载的发光元件灯,在第一方面所记载的发光元件灯中,所述导热性的壳和所述导热性的罩夹着O型圈相互连接,在该O型圈的内侧从所述点灯电路向所述光源部供电。
对于第三方面所记载的发光元件灯,在第一方面或者第二方面所记载的发光元件灯中,在所述基板安装有多个发光元件,与该基板对置地设有反射体,所述反射体具有:与所述多个发光元件对应的多个入射开口;和反射面,所述反射面以划分所述入射开口的方式从所述入射开口朝照射方向扩开。
第四方面所记载的照明设备具备:设备主体,该设备主体具有灯座;以及第一方面或者第二方面所述的发光元件灯,该发光元件灯装配于该设备主体的灯座。
发明效果
根据第一方面所记载的发明,能够利用导热性的壳和导热性的罩有效地抑制安装有发光元件的基板的温度上升。进一步,由于导热性的壳朝向照射开口部扩开,因此发挥散热作用的外周面的面积大,对于提高散热效果是有效的。并且,由于导热性的壳和导热性的罩形成面接触状态,因此热传导良好。
根据第二方面所记载的发明,除了第一方面所记载的发明的效果之外,能够利用简单的结构维持防水功能,同时能够确保朝光源部供电的供电路径。
根据第三方面所记载的发明,除了第一方面或者第二方面所记载的发明的效果之外,能够针对每个发光元件由反射体的反射面进行配光控制,不必附加其他的光控制单元构件,就能够进行期望的光学处理。
根据第四方面所记载的发明,除了能够起到所述发光元件灯的效果之外,能够提供一种能够将来自灯头的热传导至灯座而有效地进行散热的照明设备。
附图说明
图1是示出本发明的实施方式所涉及的发光元件灯的剖视图。
图2是将该发光元件灯的导热性的壳卸下并示出的俯视图。
图3是示出该发光元件灯的反射体的立体图。
图4是示出该发光元件灯的反射体的剖视图。
图5是示出本发明的实施方式所涉及的照明设备的立体图。
标号说明
1:发光元件灯;2:导热性的壳;2:照射开口部;2c:基板安装部;3:光源部;3a:反射体;3b:入射开口;3c:反射面;4:发光元件;5:导热性的罩;6:绝缘性的罩;7:灯头;9:基板;10:O型圈;12:点灯电路;20:照明设备;21:设备主体;23:灯座。
具体实施方式
以下,参照图1至图4对本发明的实施方式所涉及的发光元件灯进行说明。图1是示出发光元件灯的剖视图,图2是将该发光元件灯的导热性的壳卸下并示出的俯视图,图3是示出该发光元件灯的反射体的立体图,图4是示出该发光元件灯的反射体的剖视图。本实施方式的发光元件灯能够替换所谓的被称作射灯(beam lamp)的现有的反射型白炽灯进行安装,且形成为外观尺寸与射灯大致同等的结构。射灯是在商店的聚光灯(spotlight)、大厦或招牌等的投光照明、施工现场等的照明中应用的灯。
在图1中,发光元件灯1形成为与现有的射灯同样的外观形态,且具有防水功能以适于在室外使用。该发光元件灯1具备导热性的壳2、光源部3、反射体3a、发光元件4、导热性的罩5、绝缘性的罩6、灯头7、以及作为透光性罩的前面透镜8。
导热性的壳2例如由铝的一体成形品构成,在表面形成有白色的丙烯酸烤漆,且从根部2a到照射开口部2b扩开,并且,该壳2以外周面在外侧露出的方式形成为有底碗状。导热性的壳2的内周面的底壁为平坦面,形成有基板安装部2c。另一方面,外周面的底壁周缘形成与导热性的罩5连接的环状的连接部2d。并且,在导热性的壳2的底壁,沿圆周方向隔开大约120度的间隔在3个部位形成有螺钉贯通孔。另外,基板安装部2c也可以与导热性的壳2分体构成,并以热结合的方式将该分体形成的基板安装部2c安装于导热性的壳2。并且,导热性的壳2的材料并不限于铝,可以使用导热性良好的金属材料或者树脂材料等。进一步,导热性的壳2的内周面优选实施了铝阳极氧化处理。通过实施铝阳极氧化处理能够提高导热性的壳2的散热效果。如果实施铝阳极氧化处理,则该导热性的壳2的内周面的反射效果下降,但是,由于另外设置反射体3a,因此,该反射效果的下降在性能方面并不存在影响。另一方面,在利用导热性的壳2的内周面作为反射面的情况下,只要通过镜面加工等形成反射面即可。
在导热性的壳2的底壁设有光源部3。光源部3具备基板9和安装于该基板9的发光元件4。此处,发光元件4是LED芯片,该LED芯片以板上芯片封装(chip on board)方式安装于基板9。即,形成为这样的构造:在基板9的表面上呈矩阵状地配设多个LED芯片,并在表面涂敷涂料。基板9由大致圆形的平板构成,该平板是由金属制成的,例如由铝等导热性良好且散热性优异的材料形成。在使基板9为绝缘材料的情况下,能够应用散热特性比较好、耐久性优异的陶瓷材料或者合成树脂材料。在使用合成树脂材料的情况下,例如能够由玻璃环氧树脂(glass epoxy)等形成。
进而,基板9安装成,与形成于导热性的壳2的底壁的基板安装部2c以面接触的方式紧贴。当安装该基板9时可以使用粘接剂,在使用该粘接剂的情况下,优选使用在硅酮树脂系的粘接剂中混合金属氧化物等而得到的导热性良好的材料。另外,该基板9与基板安装部2c之间的面接触也可以不是整面接触、而是局部接触。
在基板9的表面侧配设有由白色的聚碳酸酯或ASA树脂等形成的反射体3a。该反射体3a对从LED芯片放射的光进行配光控制,发挥高效地进行照射的功能。反射体3a呈圆板状,且由棱线部划分而形成有多个入射开口3b。该反射体3a的入射开口3b与基板9的各个LED芯片对置配置,因此,在反射体3a中,在每个入射开口3b形成有从入射开口3b朝照射方向、即朝棱线部扩开的大致碗状的反射面3c。并且,在反射体3a的外周部,在圆周方向隔开大约120度的间隔在3个部位形成有供螺钉贯通卡定的缺口3d。
其次,导热性的罩5由铝制压铸件制成,在表面形成有白色的丙烯酸烤漆,该罩5与导热性的壳2的外周面连续而形成为尖细的大致筒状。即,该导热性的罩5的长度尺寸和厚度尺寸考虑散热效果等适当确定即可。导热性的罩5的与导热性的壳2连接的连接部5a具有预定的宽度且呈环状(参照图2)。因此,导热性的壳2的连接部2d与该连接部5a对置形成,且在面接触状态下热结合而连接。在连接部5a形成有环状的槽,在该槽中嵌入有由合成橡胶等形成的O型圈10。在该O型圈10的内侧,在圆周方向隔开大约120度的间隔形成有3个螺纹孔11。
在导热性的罩5的内侧,沿着该导热性的罩5的形状设有由PBT树脂成形的绝缘性的罩6。因此,该绝缘性的罩6的一端侧与导热性的罩5连接,另一端侧从导热性的罩5突出。在绝缘性的罩6的从该导热性的罩5突出的突出部分6a固定有灯头7。灯头7是灯头标准中的E26灯头,是当将发光元件灯1装配于照明设备时拧入照明设备的灯座的部分。另外,在突出部分6a形成有空气孔6b。空气孔6b是在绝缘性的罩6内的内压升高的情况下发挥减压作用的小孔。
其次,在绝缘性的罩6内收纳有点灯电路12。点灯电路12用于对LED芯片进行点灯控制,该点灯电路12由电容器和作为开关元件的晶体管等部件构成。点灯电路12安装于电路基板12c,该电路基板12c呈大致T字状,且在纵向被收纳于绝缘性的罩6内。由此,能够有效地利用狭窄的空间来配设电路基板12c。并且,从该点灯电路12导出导线12a,该导线12c经由形成于基板安装部2c的导线贯通孔12b与光源部3的基板9电连接。另外,点灯电路12与灯头7电连接(省略图示)。另外,点灯电路12可以全都被收纳在绝缘性的罩6中,也可以是一部分被收纳在绝缘性的罩6中、其余部分被收纳在灯头7内的方式。
在绝缘性的罩6内,以包括点灯电路12在内进行覆盖的方式填充有填充材料13。该填充材料13由硅酮树脂制作,具有弹性、绝缘性以及导热性。在填充材料13的填充时,首先,从绝缘性的罩6的上方注入液状的填充材料13。将填充材料13注入到绝缘性的罩6的上端部水平,然后,在高温氛围下使填充材料13硬化、稳定。
接着,以气密地覆盖导热性的壳2的照射开口部2b的方式经由硅酮树脂制的未图示的衬垫安装前面透镜8。另外,前面透镜8存在聚光型和散光型,能够根据用途适当选择。
其次,对导热性的壳2与导热性的罩5之间的连接状态进行说明。使导热性的壳2的连接部2d与导热性的罩5的连接部5a对置配置。进而,将基板9配置在导热性的壳2的基板安装部2c,并使反射体3重叠在基板9上。接着,经由反射体3a的缺口3d和导热性的壳2的螺钉贯通孔将螺钉14拧入导热性的罩5的螺纹孔11。由此,导热性的壳2被固定于导热性的罩5,并且,反射体3a的下端按压基板9的表面侧,反射体3a和基板9都被固定于导热性的壳2的底壁。在这种状态下,O型圈10在连接部5a和连接部2d之间弹性变形,并使它们之间成为气密状态,即,O型圈10的内侧保持于气密状态。因此,在O型圈10的内侧进行点灯电路12与安装有LED芯片的基板9之间的借助导线12a的电连接等布线处理。
在图4中,在安装有LED芯片的基板9的外周缘设有连接器15。该连接器15由与基板9的布线图案连接的受电端子15a和经由导线12a与点灯电路12的布线图案连接的供电端子15b构成,且形成为插座形式。在该情况下,布线处理在O型圈10的内侧进行,保证了电连接部分的密闭性。并且,由于连接器15沿横向配置、并从横向连接,因此高度尺寸比反射体3a的高度尺寸低,连接器15不会成为从反射体3照射的光的障碍。
对以上述方式构成的发光元件灯1的作用进行说明。当将灯头7装配于照明设备的灯座并进行通电时,点灯电路12动作而对基板9供给电力,从而LED芯片发光。对于从LED芯片射出的光,主要是针对每个LED芯片由反射体3a的反射面3c进行配光控制,并通过前面透镜8朝前方照射。伴随于此,从LED芯片产生的热从基板9的背面的大致整面向基板安装部2c传导,并进一步朝散热面积大的导热性的壳2传导。进一步,从导热性的壳2的连接部2d向导热性的罩5的连接部5a进行热传导,并向导热性的罩5整体传导。这样,各个部件热结合,能够利用上述的热传导路径和散热抑制基板9的温度上升。另一方面,从点灯电路12产生的热经由填充材料13向导热性的壳2传导、散热,并且向灯头7传导并从灯头7传导至照明设备的灯座等而散热。
另外,在本实施方式的发光元件灯1中,前面透镜8隔着衬垫安装于导热性的壳2的照射开口部2b,在导热性的壳2的连接部2d与导热性的罩5的连接部5a之间设有O型圈10,此外,点灯电路12由填充材料13覆盖,因此能够保证电绝缘性,并具有耐气候性、防雨性的功能,形成为适于在室外使用的结构。并且,因此,虽然采用密闭构造,但是,当点灯电路部件发生异常,假设电容器破损、破裂、绝缘性的罩6的内压上升时,存在诱发二次破损的可能性,但是,能够通过空气孔6b排出绝缘性的罩6内的上升的压力。
根据以上述方式构成的本实施方式,能够针对每个LED芯片由反射体3a的反射面3c进行配光控制,不必使用其他的光控制构件(制光手段),就能够进行期望的光学处理。并且,能够利用导热性的壳2和导热性的罩5有效地抑制安装有发光元件4的基板9的温度上升。进一步,由于导热性的壳2朝向照射开口部2b扩开,因此起到散热作用的外周面的面积大,对于提高散热效果是有效的。并且,由于导热性的壳2和导热性的罩5形成面接触状态,因此热传导良好。并且,由于在导热性的壳2的连接部2d与导热性的罩5的连接部5a之间设置O型圈10来保持密闭性,因此能够利用简单的结构维持防水功能,同时能够确保朝向光源部3供电的供电路径。此外,由于能够使用现有的所谓的射灯的构成部件,因此能够使部件通用化,能够提供廉价的发光元件灯1。
其次,参照图5的立体图对以发光元件灯1作为光源的照明设备的实施方式进行说明。该照明设备20示出在室外使用的聚光灯。照明设备20具备设备主体21和用于安装该设备主体21的基座22。在设备主体21内设有灯座23,发光元件灯1的灯头7拧入该灯座23而进行装配。另外,照明设备20的设置通过将基座22固定于地面等进行,并且,设备主体21能够相对于基座22改变朝向,能够任意地改变光的照射方向。根据这种照明设备20,能够利用导热性的壳2和导热性的罩5有效地抑制发光元件灯1的基板9的温度上升,并且,从点灯电路12产生的热主要传递至灯头7,并从灯头7传导至照明设备20的灯座23等而散热,能够提供能更有效地抑制基板9的温度上升的照明设备20。
另外,本发明并非必须使用现有的射灯的构成部件。
产业上的可利用性
本发明能够用于应用LED等发光元件作为光源的发光元件灯、以及使用了该发光元件灯的照明设备。
Claims (10)
1.一种发光元件灯,其特征在于,所述发光元件灯具备:
导热性的基板安装部,该基板安装部具有螺钉贯通孔;
光源部,该光源部具有在一端侧安装有发光元件的基板,所述基板的另一端侧以热结合的方式安装于所述基板安装部的一端侧;
导热性的罩,该导热性的罩在内部具有空间,并且在一端侧设有所述基板安装部;
点灯电路,该点灯电路配置于所述导热性的罩的所述空间中;以及
按压体,该按压体具有螺钉贯通部,经由所述螺钉贯通部和所述基板安装部的所述螺钉贯通孔将螺钉从一端侧拧入,由此以另一端侧按压所述基板的一端侧,将所述光源部固定于所述基板安装部。
2.根据权利要求1所述的发光元件灯,其特征在于,
所述导热性的罩在一端侧具有连通所述空间的开口,所述导热性的罩的开口被所述基板安装部阻塞。
3.根据权利要求1或2所述的发光元件灯,其特征在于,
所述导热性的罩具有螺纹孔,
所述螺钉经由所述螺钉贯通部和所述螺钉贯通孔被拧入所述导热性的罩的所述螺纹孔中。
4.根据权利要求1或2所述的发光元件灯,其特征在于,
在所述导热性的罩的所述空间中配置有绝缘性的罩,在所述绝缘性的罩的内部收纳有所述点灯电路。
5.根据权利要求4所述的发光元件灯,其特征在于,
所述绝缘性的罩的另一端侧从所述导热性的罩突出,在突出部分连接有灯头。
6.根据权利要求1或2所述的发光元件灯,其特征在于,
所述导热性的罩具有与所述基板安装部的背面侧热结合的环状的连接部。
7.根据权利要求1或2所述的发光元件灯,其特征在于,
所述按压体是具有入射开口的反射体,所述入射开口与所述发光元件对置配置。
8.根据权利要求1或2所述的发光元件灯,其特征在于,
所述基板安装部的外周面在外侧露出。
9.根据权利要求1或2所述的发光元件灯,其特征在于,
所述基板安装部形成于导热性的壳的内周面的底壁,所述导热性的壳从根部到照射开口部扩开,且外周面在外侧露出。
10.一种照明设备,其特征在于,所述照明设备具备:
设备主体,该设备主体具有灯座;以及
权利要求1-9中任一项所述的发光元件灯,该发光元件灯装配于该设备主体的灯座。
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- 2009-06-04 CN CN2013104168115A patent/CN103470984A/zh active Pending
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CA2719249C (en) | 2013-04-16 |
CN103470983A (zh) | 2013-12-25 |
MX2010014517A (es) | 2011-02-22 |
JP2013175465A (ja) | 2013-09-05 |
JP5287547B2 (ja) | 2013-09-11 |
CA2719249A1 (en) | 2009-12-30 |
US8294356B2 (en) | 2012-10-23 |
JP5282990B1 (ja) | 2013-09-04 |
WO2009157285A1 (ja) | 2009-12-30 |
US20110089806A1 (en) | 2011-04-21 |
EP2256402A4 (en) | 2012-08-15 |
JP5320555B2 (ja) | 2013-10-23 |
CN101978209A (zh) | 2011-02-16 |
EP2256402A1 (en) | 2010-12-01 |
JP2010034546A (ja) | 2010-02-12 |
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Application publication date: 20131225 |