JPH0120745Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention relates to a cylindrical lighting fixture.

[Background technology]

Conventionally, lighting equipment has been used in which a straight tube fluorescent lamp and a chassis are housed in a transparent cylinder, and end caps are provided at both ends of the transparent cylinder.
However, the translucent cylinder was sometimes deformed by external force at both ends, creating a gap between it and the inner surface of the end cap. Further, there was a problem in that the lighting components inside the end cap were visible from outside the light-transmitting cylinder, spoiling the appearance.

[Purpose of invention]

The object of this invention is to provide a lighting fixture in which the end portion of the light-transmitting cylinder is difficult to deform, and in which the built-in parts of the end cap can be hidden.

[Disclosure of invention]

In the lighting fixture of this invention, a reinforcing disk is fitted into the end of the translucent cylinder to serve both as reinforcement and to blind the inside of the end cap.

An embodiment of this invention is shown in FIGS. 1 to 4. In the figure, reference numeral 1 denotes a light-transmitting cylinder, and cylindrical end caps 2 are fitted onto both ends of the cylinder at their mouths. A waterproof packing 3 is fitted into the mouth of the end cap 2. A chassis 4 is provided over the transparent cylinder 1 and the end cap 2, and straight tube fluorescent lamps 6 are attached to sockets 5 attached to the chassis 4 at both ends of the transparent cylinder 1. Chassis 4 end cap 2
A mounting frame 7 bent in a U-shape is provided in the inner part, and a lighting component 8 such as a ballast is mounted to the chassis 4 inside the mounting frame 7. The end cap 2 is fixed to the mounting frame 7 with screws 9. Translucent cylinder 1
A reinforcing disk 10 is arranged at both ends of the transparent cylinder 1 at the same position as the packing 3 in the axial direction of the transparent cylinder 1. The entire outer circumference of the reinforcing disk 10 is substantially close to the inner circumferential surface of the light-transmitting cylinder 1, and the reinforcing disk 10 is fixed to the mounting frame 7 with a screw 11 at the center. The reinforcing disk 10 has a notch through which the chassis 4 is inserted. In FIG. 1, 12 is a power cord.

In this way, the reinforcing disk 10 is placed inside the transparent cylinder 1 at the same position as the packing 3 of the end cap 2 in the axial direction of the transparent cylinder 1,
In addition, since the entire outer periphery of this reinforcing disk 10 is approximately close to the inner circumferential surface of the transparent cylinder 1, at the fitting portion between the transparent cylinder 1 and the end cap 2, The circular cross-sectional shape is prevented from deforming. Therefore, the transparent cylinder 10
This deformation prevents a gap from forming between the packing 3 and the translucent cylinder 1, thereby preventing deterioration of waterproof properties. Further, the lighting component 8 and the mounting frame 7 built into the end cap 2 are hidden by the reinforcing disk 10, improving the appearance.

[Effect of idea]

In the lighting fixture of this invention, a reinforcing disk is placed inside the translucent cylinder at the same position as the packing of the end cap in the axial direction of the translucent cylinder, and the entire circumference of this reinforcing disk is transparent. Since it is arranged substantially close to the inner circumferential surface of the light cylinder, the circular cross-sectional shape of the light-transmitting cylinder is prevented from being deformed at the fitting portion between the light-transmitting cylinder and the end cap. Therefore, it is possible to prevent a gap from being created between the packing and the transparent cylinder due to deformation of the transparent cylinder, thereby preventing deterioration of waterproof properties. In addition, lighting components built into the end cap are hidden by the end cap, improving the appearance. Furthermore, since the aforementioned deformation prevention and blindfolding functions are both performed by a single reinforcing disk, the structure is simple.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of an embodiment of this invention, FIG. 2 is a cutaway front view thereof, FIG. 3 is a partial perspective view thereof, and FIG. 4 is a partial sectional view thereof. 1... Translucent cylinder, 2... End cap,
4... Chassis, 5... Socket, 6... Straight tube fluorescent lamp, 8... Lighting parts, 10... Reinforcement disk.

Claims (1)

[Scope of utility model registration request] a transparent cylinder; a cylindrical end cap having a mouth fitted onto the end of the transparent cylinder; and packing interposed around the entire circumference between the mouth of the end cap and the transparent cylinder; a reinforcing disk disposed inside the light-transmitting cylinder at the same position as the packing with respect to the axial direction of the light-transmitting cylinder, and having an outer peripheral edge substantially close to the inner circumferential surface of the light-transmitting cylinder; A lighting fixture comprising: a chassis provided in a translucent cylinder and having sockets for straight tube fluorescent lamps at both ends.