JPS6318083Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a lighting fixture that is installed on a desk surface and has a light source and a light distributor that distributes light from the light source onto the desk surface. The present invention relates to a desk lighting fixture that uses a reflective plate.

Traditionally, lighting fixtures for study desks or office desks have been made using a T-shaped stand, which consists of an installation stand, a shade arm, and a fluorescent lamp shade, and which is installed on the desk surface, or a desk board using clamp-type or clip-type mounting fittings. An arm-type stand is used, which is fixed to one end of the lamp and supports the light source and shade via the arm. All of these conventional desk lighting devices require a structure to position the light source above the desk surface and a structure to maintain it in a stable state in order to distribute light from above the desk surface, and require a large number of parts. In addition, it is necessary to take into account their strength, which has the disadvantage of increasing costs. Furthermore, many desk lighting fixtures cannot illuminate the desk top surface uniformly, so the light source position must be moved as necessary, and this function must be added to the structural member. In addition, these structures were visible to the people using them, giving the impression that they were complicated.

This idea was created in view of the above-mentioned disadvantages, and by uniformly illuminating the entire surface of the desk from a low position, it simplifies the structure, reduces the number of parts, reduces costs, and simplifies the desk surface. The purpose of the present invention is to provide a small-sized desk lighting fixture that can

Examples of this invention will be described below with reference to the drawings.

FIG. 1 is an external view of a desk lighting fixture that is an embodiment of this invention. As shown in the figure, the desk lighting device main body 1 has an elliptical back surface, and the upper and lower surfaces are formed of flat plates. Louvers 3 are arranged in multiple stages on the open front surface of the desk lighting device main body 1 to distribute light from a light source inside the main body forward. Further, a switch 2 for blinking the light source is installed on the top surface of the main body, and a ballast is stored in a ballast storage section 1b at the bottom of this switch 2.

FIG. 2 is a diagram showing the cross section and light distribution of a desk lighting fixture that is an embodiment of this invention. The reflector plate 1a on the back of the main body has a cross-sectional shape having an arc near one focal point A of a virtual ellipse indicated by a dashed line in the figure, and a straight tube fluorescent lamp 4 serving as a light source is located at the focal point A. is supported by a socket (not shown). The reflector support stand 1c is positioned so that the other focal point B of the virtual ellipse is located below the upper surface 5' of the desk board 5.
By setting , the light beam from the straight tube fluorescent lamp 4 reflected by the reflecting plate 1a can be distributed onto the desk surface 5'.
In addition, louvers 3 are arranged in multiple stages on the front of the fluorescent light.
The angle is adjusted so that it does not block the light rays traveling from the reflecting plate 1a to the focal point B. This louver 3 prevents the light beam from the fluorescent lamp 4 from directly entering the user's field of view, and furthermore, scatters the light beam from the desk surface 5'.
Evenly distributed light.

FIG. 3 is a diagram showing the state of use of a desk lighting fixture which is an embodiment of this invention. As shown in the figure, the lighting fixture main body is installed at the end of the desk top surface 5'.
All of the light rays are distributed on the desk top surface 5', and no light rays enter the user's 6's field of vision directly.

In addition, if the angle of the support base of the desk lighting fixture is made adjustable so that the position of the focal point B of the virtual ellipse shown in Fig. 2 can be moved up and down, the light distribution range can be adjusted. It is possible to obtain lighting that corresponds to changes in the length of the desk surface.

In this way, according to this invention, the desk surface can be illuminated from a low position, and the light distribution is uniform, so
There is no need to provide a structure that supports the light source in an upwardly movable manner, reducing the number of parts and reducing costs. Furthermore, the structure can be made smaller and simpler, keeping the desk surface tidy. It has the advantage of being able to provide a desk lighting fixture that can

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of this invention, FIG. 2 is a cross-sectional view and a diagram showing light distribution, and FIG. 3 is a diagram showing the state of use of this invention. 1...Desk lighting fixture body, 1a...Reflector plate. 1
c... Reflector support stand, 3... Louver, 4... Straight tube fluorescent light, 5... Desktop board, 5'... Desktop surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A lighting fixture installed on a desk surface and comprising a light source and a light distribution fixture that distributes light from the light source onto the desk surface, wherein the light source is placed at one focal point of an ellipse. At the same time, the light distributor includes a reflector whose cross section is a part of the ellipse near the light source, and a reflector whose cross section is a part of the ellipse near the light source. A desk lighting device comprising: a support base that supports the reflector so as to be positioned below; and louvers that are arranged in multiple stages in front of the light source and distribute light forward.