JPS641690Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to the improvement of lighting equipment used as blackboard lights, etc., and in particular, the invention relates to the improvement of lighting equipment used as blackboard lights, etc. In particular, the invention relates to the improvement of lighting equipment used as blackboard lights etc. The present invention relates to a structure that is movable and allows the direction of irradiation to be changed arbitrarily.

[Prior art]

BACKGROUND ART Conventionally, various structures have been implemented as lighting fixtures for blackboard lamps. For example, a box-shaped lighting fixture is embedded in the ceiling of a building, and a socket for mounting a light source and a reflector are supported inside the lighting fixture. By the way, in order to change the irradiation direction of a blackboard with a lighting fixture of the same structure, the socket is fixed and the angle of the reflector is changed.

However, simply changing the angle of the reflector creates a gap between the lighting fixture body and the reflector, making it easy for dust to get into the lighting fixture body.Also, since the light source is fixed and the reflector is movable, it is difficult to place the light source on the blackboard surface. The shape of the light changes significantly, causing glare, and a portion of the reflector protrudes from the bottom of the lighting fixture, which tends to impair its aesthetic appearance. Therefore, as another conventional structure, a socket for mounting a light source is fixed to a reflector that is movably supported inside the lighting fixture body.
A construction has been implemented in which, by moving the reflector, the socket can also be moved.

However, this structure has the drawback that when inspecting the inside of the lighting fixture body, when the reflector is opened, the long lead wire connected to the socket comes out, making it difficult to handle and poor workability.

[Purpose of invention]

The present invention was devised in view of the above-mentioned points, and it prevents dust from entering the interior of the lighting equipment body, and also allows the light distribution shape of the lighting equipment to be approximately constant.
Furthermore, it is an object of the present invention to provide a lighting fixture that is easy to perform operations such as inspecting the inside of the lighting fixture body.

[Structure of the idea]

The present invention will be explained below with reference to FIGS. 1 to 4. In the figure, 1 is a box-shaped lighting fixture body, and 2 is a support body having a vertically elongated support hole 3 at a suitable location and having an arc-shaped cross section, and is provided along the inner wall surface of the lighting fixture body 1. be. Reference numeral 4 denotes support fittings provided inside both ends of the lighting fixture main body 1, which are configured in an arc shape and are configured with vertically elongated holes 5 provided along the arc surface. Reference numeral 6 denotes a socket for mounting a light source, and is configured to be movable along the hole 5 of the support fitting 4. Reference numeral 15 denotes a mounting fitting for supporting the socket 6 in the hole 5 of the support fitting 4, and 7 is a reflector, which has holes 8 provided corresponding to the support holes 3 of the support member 2. One end of the reflector 7 is engaged with the inside of the luminaire main body 1, and the other end is supported by a latch 9 inserted through the hole 8 of the reflector 7 and into the support hole 3 of the support 2. Reference numerals 10 and 11 denote a plurality of protrusions provided on the outer surface of the reflector 7, which engage with the outer end of the socket 6, so that when the reflector 7 is moved inside the lighting device body 1, the socket 6 can be moved together. , so that the socket 6 is always located at a fixed location on the reflector 7. Reference numeral 12 denotes a straight tube-shaped light source attached to the socket 6, and is, for example, a fluorescent lamp. Reference numeral 13 denotes a discharge lamp ballast fixed to a space 14 inside the lighting fixture body 1.

Next, the movement of the reflector and light source in the lighting fixture having the above structure will be explained.

(1) Rotate the latch 9 in the lighting fixture with the above structure, move the reflector 7 along the support 2, and return the latch 9 to its original position at a predetermined location to fix the reflector 7.

(2) When the reflector 7 is moved as described above, the plurality of protrusions 10 and 11 provided on the outer surface of the reflector 7
engages the socket 6, and the socket 6 moves together with the reflector 7 along the hole 5 of the support fitting 4.
Therefore, the position of the socket 6 relative to the reflector 7 is always constant, and when the reflector 7 is moved, the light distribution of the lighting fixture itself does not change, only the projection direction changes, and the desired location on the illuminated surface such as a blackboard is compared. It can be illuminated with uniform illuminance.

[Effect of idea]

As described above, the present invention provides a support body having support holes at appropriate locations and an arcuate cross section on the inner wall surface in the longitudinal direction of a box-shaped lighting equipment body, and also provides an arcuate shape on the inside of both ends of the lighting equipment body. A supporting metal fitting having a vertically elongated hole along the same circular arc surface is provided, and a socket is provided so as to be movable with respect to the supporting metal fitting. Due to the simple structure provided with an interlocking reflector, by moving the reflector as described above, the socket moves together, and the socket is always in a constant position relative to the reflector, and when the reflector is moved, the lighting fixture itself The light distribution does not change, only the projection direction changes, and a desired location on the illuminated surface can be illuminated with relatively uniform illuminance, which has the advantage of making it easier to read the characters on the blackboard.

In addition, since the reflector moves inside the lighting fixture, the inside of the lighting fixture and the reflector are less likely to get dirty with dust, and since the socket is not fixed to the reflector, the reflector can be removed from the lighting fixture. This has the advantage that inspection of the inside of the lighting fixture body can be carried out with good work efficiency.

[Brief explanation of the drawing]

Figure 1 is a side view of the lighting equipment according to the present invention;
The figure shows the lighting equipment main body and support body in FIG. 1,
3 is a front view showing the relationship between the lighting fixture body, the reflector, and the socket in FIG. 1, and FIG. 4 A and B show the support and reflector in FIG. 1. FIG. 2 is a partially enlarged sectional view showing a body support structure. DESCRIPTION OF SYMBOLS 1...Lighting device main body, 2...Support body, 4...Support metal fittings, 6...Socket, 7...Reflector.

Claims (1)

[Scope of utility model registration request] A box-shaped lighting fixture main body 1, having support holes 3 at appropriate locations, and having an arc-shaped cross section, and a support body 2 provided along the inner wall in the longitudinal direction of the lighting fixture main body 1, and a circular arc-shaped structure. A support fitting 4 having a vertically elongated hole 5 along an arcuate surface and supported inside both ends of the lighting fixture body 1, a socket 6 configured to be movable in the hole 5 of the support fitting 4, and one end attached to the lighting fixture body. It has a reflector 7 which is pivoted on the inside of the lighting equipment body 1 and has protrusions 10 and 11 provided on the outside of the other end engaged with the socket 6, and by moving the reflector 7, the reflector can be moved inside the lighting equipment body 1. 7. A lighting device characterized in that the socket 6 is movable together with the reflector 7, and the socket 6 is positioned at a fixed position on the reflector 7.