公开(公告)号：US5635794A

公开(公告)日：1997-06-03

申请号：US454621

申请日：1995-05-31

Applicant: Guenter Koerfer

Inventor： Guenter Koerfer

IPC: H01J61/32 ,  H01J61/33 ,  H01J61/36 ,  H01J61/72 ,  H01J63/02

CPC classification number: H01J61/325 ,  H01J61/368 ,  H01J61/72 ,  Y02B20/19

Abstract: To increase the resistance of a tubular compact fluorescent lamp against akage, particularly at the cross-connecting portion (4) of a U-bent discharge vessel having two leg portions (2, 3), the cross-connecting portion is shaped to have generally parabolic cross section, in which the cross-sectional area of the parabola is about the same as the cross-sectional area of the generally circular leg portions of the U-shaped discharge vessel (1). This provides for better distribution of the glass material of which the discharge tube is made, and hence greater resistance to breakage. The parabolic cross section is terminated at the inner side of the U-bend by an essentially flat, or slightly curved base surface (16), merging with rounded corners (16a) with the parabolic side surfaces. Preferably, the relationship of the radius of curvature (R.sub.P) at the apex of the parabola to the radius of curvature (R.sub.B) of the transition regions (16a) at the corners between the base (16) and the parabolic side surfaces is between about 0.7 and 1.1. The uniform distribution of wall thickness reduces manufacturing defects and breakages.

Abstract translation: 为了增加管状紧凑型荧光灯对于断裂的电阻，特别是在具有两个腿部（2,3）的U形弯曲放电容器的交叉连接部分（4）处，交叉连接部分被成形为具有通常 抛物线截面，其中抛物线的横截面积与U形放电容器（1）的大致圆形腿部的横截面面积大致相同。 这提供了制造放电管的玻璃材料的更好分布，因此具有更大的抗断裂性。 抛物线横截面通过基本上平坦或略微弯曲的基部表面（16）终止于U形弯曲部的内侧，与圆角（16a）与抛物面侧表面合并。 优选地，抛物面顶点处的曲率半径（RP）与基底（16）和抛物线侧表面之间的角部处的过渡区域（16a）的曲率半径（RB）之间的关系在约 0.7和1.1。 壁厚的均匀分布减少了制造缺陷和破损。