JPH0637522Y2 - Floodlight equipped with light distribution adjustment mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a light distribution adjusting mechanism which is preferably used in a light projector in which a light projecting lamp is housed in a cylindrical case.

[Prior Art] A lighting fixture mounted on a ceiling surface or the like, for example, a light distribution adjusting mechanism used for a pinhole down or the like, has a cylindrical case accommodating a lamp fitted in a hole or the like formed in the ceiling surface. After installing the lighting equipment with, the tilting of the lamp inside the tube case by rotating the adjustment screw exposed on the front of the front lid that has the lighting hole allows you to see the actual light distribution and reach the target. However, the conventional structure has a structure in which a tilt plate with a lamp mounted inside the front lid is provided and the tilt plate is tilted by a connecting mechanism. Was complicated.

Further, in this configuration, since the rotating operation of the adjusting screw is transmitted to the tilting plate via the connecting mechanism, the movement of the tilting plate with respect to the operation amount of the adjusting screw is small, and the adjusting operation requires time. There is.

[Problems to be Solved by the Invention] The present invention has been made in view of the above circumstances, and provides a light distribution adjusting device that has a simple structure, is easy to operate, and can perform light distribution adjustment quickly. The purpose is to provide a floodlight equipped with the light.

[Means for Solving the Problems] In the present invention proposed to achieve the above object, a floodlight in which a lamp is attached to a reflecting mirror is moved in a cylindrical case and is formed on a front lid of the cylindrical case. In the projector equipped with a light distribution adjusting mechanism for changing the irradiation angle from the irradiation hole, the light distribution adjusting mechanism is fixed to the side of the light projecting lamp in the cylindrical case, and the tip operating portion of the adjusting screw is attached. A bracket that rotatably attaches an adjusting screw having an engaging piece fixed to the tail end of the adjusting screw, which is exposed from the front lid of the cylindrical case.
The light emitting lamp is attached to the tail end, the head end is pivotally attached to the bracket, and the tilting arm in which the engaging piece fixed to the adjusting screw is fitted in the horizontally elongated hole formed in the middle The tilting arm can be tilted about the head end by rotating the tip operating portion of the adjusting screw to change the irradiation angle from the irradiation hole of the light projecting lamp. It is characterized by having a structure.

[Operation] According to the projector having the light distribution adjusting mechanism of the present invention, the operating piece provided at the rear end of the adjusting screw is integrated by rotating the operating portion of the adjusting screw exposed from the front cover. Then, the tilting arm engaged with the actuating piece also tilts about the pivot portion as a fulcrum, and the irradiation angle of the light projecting lamp can be continuously variably set.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view in which a part of a projector A equipped with a light distribution adjusting mechanism B of the present invention is cut away, and FIG. 2 shows a state in which FIG. 1 is rotated by 90 °.

In the figure, the floodlight A has a front cover 11 having an irradiation hole 11a detachably attached to the front portion of a cylindrical case 10 having a ventilation hole 10a ... Inside the front lid 11, an auxiliary plate 10b having an L-shaped cross section is fixed to the side of the irradiation hole 11a, and a U-shaped bracket 4 having an adjusting screw 5 penetrating the auxiliary plate 10b is attached. is doing.

A tip operating portion 5a (screw head) is formed at the tip of the adjusting screw 5, and an operating piece 6a is provided at the tail end portion where the screw portion 5b is engraved.
The engaging piece 6 formed by projecting is fixed by the bolt 7 and the washer 7a.
When the rotating operation is performed, the adjusting screw 5 and the adjusting screw 5 are integrally rotated.

A protrusion 41 is formed on a part of the bracket 4, and the protrusion 41 has a hook-shaped portion 3 a formed on the head end of the tilting arm 3.
A pivoting portion 3b is formed by a bolt and a nut. Further, a locking piece 41a that constitutes a stopper of the tilting arm 3 is provided on a part of the protruding piece 41.

The tilting arm 3 is formed of a plate piece having a multi-stage bent portion extending toward the inner side of the tubular case 10.
A laterally elongated hole 3c is formed in the middle bent piece, and the mounting piece 3d at the final stage (tail end) is bent so as to be parallel to the irradiation hole 11a of the front lid 11a, and the lamp socket 9 is screwed. Secure with 9a, 9a,
The light projecting lamp 2 in which the lamp and the reflection casing are integrated is detachably mounted in the lamp socket 9, and the front surface of the light projecting lamp 2 faces the irradiation hole 11a of the front lid 11.

In addition, 14 and 14 are conducting wires led out from the outside of the cylindrical case 10 to the lamp socket 9, and the other end is a connecting means (not shown).
It is connected to an external power source via a power source and supplies power for turning on the projection lamp 2 mounted in the lamp socket 9.

On the other hand, in the laterally long hole 3c formed in the tilting arm 3, the operating piece 6a protruding from the engaging piece 6 attached to the tail end portion of the adjusting screw 5 is inserted so that the adjusting screw 5 and the tilting arm are inserted. It is connected and engaged. Therefore, the tip operating portion 5a of the adjusting screw 5 is
When the operation piece 6a of the engaging piece 6 is rotated together with the adjusting screw 5, the tilting arm 3 supports the pivot portion 3b as a fulcrum as shown by the chain double-dashed line in FIG. It is designed to tilt.

In the floodlight A, the tubular case 10 is fitted into the hole 20a formed in the ceiling surface 20, and the edge plate 12 provided around the front lid 11 is attached around the hole 20a. A pair of leaf springs 13 and 13 (only one of which is shown in FIG. 1) provided on the side surfaces of 10 are inserted into the gap formed between the outer periphery of the cylindrical case 10 and the hole 20a and attached.

Thus, after being attached to the ceiling surface 20 and the like, when the tip operating portion 5a of the adjusting screw 5 exposed from the front lid 11 is rotated by a screwdriver or the like, the engaging piece 6 is also rotated along with the rotation of the adjusting screw 5. It rotates as a unit, and its operating piece 6a pivots the tilting arm 3.
As shown by the chain double-dashed line in FIG. 2 with 3b as a fulcrum, it is tilted upward and downward to change the angle of the projection lamp 2 with respect to the irradiation hole 11a, and the irradiation angle with respect to the object can be variably set.

In the above-described embodiment, the configuration is such that a flat-blade screwdriver is fitted into the tip operation portion 5a of the adjusting screw 5 of the light distribution adjusting mechanism B to rotate the operation portion. The structure may be operable.

[Advantage of the Invention] According to the present invention, a light distribution adjusting mechanism having a simple structure and a low cost can be obtained.

In addition, the tilting arm to which the light emitting lamp is attached can be tilted simply by rotating the tip operation part of the adjustment screw exposed from the front lid, so adjustment operation is easy and quick light distribution adjustment is possible. It can be carried out.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a projector equipped with a light distribution adjusting mechanism of the present invention, and FIG. 2 is a partially cutaway front view of the projector shown in FIG. 1 rotated by 90 °. , FIG. 3 is a plan view of the front lid portion of the projector shown in FIG. 1, and FIG.
It is the top view which looked at the light distribution adjustment mechanism part shown in the figure from the back. (Explanation of symbols) A: Emitter 10: Cylindrical case 11: Front lid 11a: Irradiation hole B: Light distribution adjustment mechanism 2: Emitter lamp 9: Lamp socket 3: Tilt arm 3c ... … Horizontal oblong hole 4 …… Bracket 5 …… Adjustment screw 5a …… Tip operation part 6 …… Engaging piece 6a …… Operating piece

Claims (1)

[Scope of utility model registration request] 1. A light projector equipped with a light distribution adjusting mechanism, wherein a light projecting lamp having a reflector mounted with a lamp is moved in a cylindrical case to change an irradiation angle from an irradiation hole formed in a front lid of the cylindrical case. In the above, the light distribution adjusting mechanism is fixed to the side of the light emitting lamp in the tubular case, and the tip operating portion of the adjusting screw is exposed from the front cover of the tubular case, and the tail end portion of the adjusting screw is exposed. Bracket with rotatably attached adjustment screw with engaging piece fixed to it, the floodlight is attached to the tail end, the head end is pivotally attached to the bracket, and a horizontally elongated hole formed in the middle Has a structure in which a tilting arm having an engaging piece fixed to the adjusting screw fitted therein is combined, and by rotating the tip operating portion of the adjusting screw,
A light projector equipped with a light distribution adjusting mechanism in which the tilt arm is tilt-adjusted around the head end so that the irradiation angle from the irradiation hole of the light projection lamp can be varied.