JPH087606A - Spotlight - Google Patents

Abstract

PURPOSE:To develop a shutter blade which is an iris unit constituting member of a spotlight. CONSTITUTION:Black zinc galvanizing 43 is performed on the surface of a thin iron plate with flexing elasticity and fluorine-contained grease 44 is coated on the galvanized surface so as to constitute a shutter blade 41 which is an iris unit constituting member. Thereby, it is possible to provide a spotlight equipped with the iris unit being excellent in durability and smooth operating characteristics and allowing no occurrence of operating sounds and smells caused by heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-intensity spotlight structure used for illuminating a person on a stage such as a theater or a wedding hall.

[0002]

2. Description of the Related Art For example, as a spotlight structure of this type, there is a structure as shown in FIGS. That is, 1 is a spotlight case, and a lamp mounting frame 4 for holding a meta-harass lamp 3 having a reflecting mirror 2 is fixed inside the case 1, and further in front of the meta-harass lamp 3. , The iris unit 5, the movable lens 6, and the fixed lens 7 are arranged in this order. Further, the iris unit 5 is provided with an iris adjusting lever 9 protruding through a through hole 8 provided in the upper part of the case. The movable lens 6 is held by a movable frame 10 provided in the inner bottom portion of the case 1 so as to be movable in the front-rear direction. The movable frame 10 has a longitudinal length formed on a side wall of the case 1. An operation lever 12 penetrating the hole 11 is attached, and by sliding the operation lever 12 along the elongated hole 11 in the front-rear direction, the movable frame 10 moves in the front-rear direction, and as a result, the fixed lens 7 and The distance from the movable lens 6 changes, and the focus of the spotlight changes.

Reference numeral 13 denotes the operating lever 12 or the movable frame 1
It is a long light shield plate which is fixed to 0 and is positioned so as to close the long hole 11, and the light of the long light shield plate 13 prevents the light in the case 1 from being exposed to the outside of the case. ing.

Reference numeral 14 is a cooling fan for cooling the meta-harass lamp 3, 15 is a connector connected to the meta-harass lamp 3 through an electric wire 16, 17 is a ballast mounted outside the case 1, and 18 is a case. Reference numeral 19 denotes a turntable that is supported so as to be rotatable or tiltable, and reference numeral 19 denotes a maintenance door provided on the upper surface of the case 1.

Next, the structure of the iris unit 5 will be described with reference to FIGS.

Reference numerals 20 and 21 denote a pair of fixed frames which are fixed in the case 1 and are spaced apart from each other in the front-rear direction, and an annular rotating disk 22 is supported between the two fixed frames (not shown). It is rotatably held by the body.

The iris adjusting lever 9 is attached to a part of the rotary disk 22, and the rotary disk 22 can be rotated by operating the iris adjusting lever 9.

Further, a large number of radial holes 23 are formed in the rotary disk 22 in the radial direction, and a slider shaft 25 projecting from one end of each shutter blade 24 is loosened for each of these long holes 23. It is fitted. At the other end of each shutter blade, a pivot hole 26 provided in the fixed frame 21 is provided.
A pivot shaft 27 that engages with is protrudingly provided.

Therefore, the shutter blades 24 have the rotating disk 2
As shown in FIG. 5, a large number of shutter blades (18 in this embodiment) are arranged in the circumferential direction of 2, and the rotary disk 22 is rotated by the rotation operation of the iris adjusting lever 9 so that a large number of shutter blades are provided. The opening diameter of the central opening of the rotating disk formed by the above changes, and as a result, the metahara lamp 3
The amount of transmitted light of the light emitted from is adjusted.

Further, 28 has one end pivotally supported by a shaft 29 provided on the fixed frame 20, and has a long hole 31 into which a pin 30 projecting from the rotary disk 22 is loosely fitted. Indicates a shutter in which the shutter blades 24 move in the direction in which the shutter blades 24 are squeezed to the minimum, and when the rotating disk 22 is rotated more than the minimum squeeze, the opening 32 that is squeezed to the minimum is closed. The light emitted from the meta-hala lamp is completely blocked by this operation.

It is known that each of the shutter blades 24 is formed of a thin iron plate, and the surface of the iron plate is coated with a black coating film for antireflection.

[0012]

However, in the shutter blade 24 provided with the black coating film, the friction coefficient of the coating films of the shutter blades that overlap with each other or are in sliding contact with each other is large, and this is the cause. Therefore, there is a problem that the operation of the iris adjusting lever 9 is not smoothly performed. Further, since the adhesion of the coating film to the surface of the iron plate is weak, there is a problem that the coating film is peeled off by repeatedly rubbing the shutter blades.

In order to solve these problems, it is considered to use a stainless material which does not require a coating film as the material of the shutter blade 24. In this case, light is reflected on the surface of the shutter blade, which causes Then, since the problem that the shutter blade shape is reflected on the surface of the illuminated object occurs, the shutter blade having no black coating film on the surface is not practical.

[0014]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to such a conventional problem, in which each shutter blade constituting the iris unit is formed of a thin iron plate plated with black zinc. It is an object of the present invention to apply a Teflon grease to the surfaces of the shutter blades to provide a spotlight having excellent light non-reflection performance, durability and economy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below. In the present invention, the features of the surface treatment processing means for the shutter blade described in the conventional example are the same, and the structure of the spotlight is the same as that described in the conventional example. Therefore, the description of the structure is omitted.

That is, FIGS. 6 and 7 show a shutter blade unit according to an embodiment of the present invention. Normally, 18 shutter blade units are described in the conventional example for a shutter unit in one spotlight. Thus, they are used in combination.

The material of the shutter blade unit body (hereinafter referred to as shutter blade) 41 is thin and a thin iron plate having sufficient flexibility elasticity (for example, SPCC-2 having a thickness of 0.15).
B) is used as a material to obtain a shutter blade-shaped cutting material 42 as shown in FIG.

Next, the surface of the cutting material 42 is subjected to black zinc plating (MFzn8K) 43 to obtain a primary treated product.

Then, a fluorine-based grease 44 is applied to the surface of this primary treated product to obtain a finished product. As the fluorine grease, PFAE (perfluoroalkylpolyether) is used as a base oil, and PTFE is added to this base oil.
(Tetrafluoroethylene resin) is added as an image-thinning agent, and for example, a fluorine-based grease which is Tribon ST-1 used in Nichimori Division of Osaka Shipbuilding Co., Ltd. can be used.

That is, the shutter blade unit 4 of the present invention
In No. 1, the surface of a flexible thin iron plate 42 is plated with black zinc 43, and fluorine grease 44 is applied to the plated surface to complete a shutter blade unit.

By thus applying the black zinc plating 43 to the surface of the thin iron plate 42, it is possible to inexpensively perform the light non-reflective processing on the shutter blade surface, and the zinc plating 43 has excellent durability. As the shutter blades are used for a long period of time, the plating does not peel off even if the shutter blades are repeatedly rubbed with each other.

Further, by coating the surface of the galvanized surface with the fluorine-based grease 44, the coefficient of friction between the shutter blades is reduced and the shutter blades operate smoothly. Fricative,
Generation of operating noise is suppressed, and by using this fluorine-based grease 44, even if the shutter blade is placed in the high temperature atmosphere of the heat generation (about 200 ° C.) of the meta-hara lamp, the alteration and evaporation of oil due to the high temperature. The generation of foul odors is suppressed, which improves the durability of the spotlights, and further, for example, it is possible to maintain a favorable environment venue without causing unpleasant feelings to the guests in the wedding reception hall. it can.

[0023]

As described above, the present invention is a spotlight in which the lamp 3, the iris unit 5, the lens 6 and the like are arranged inside the case 1 of the iris unit used for the spotlight. Since the shutter blades constituting No. 5 are made of thin iron plate having flexible elasticity, the surface of which is black zinc-plated, and the surface of the black zinc-plated is coated with fluorine-based grease. Since the antireflection means applied to the blades, that is, the antireflection means in the present invention is black zinc plating, it is possible to realize antireflection with low cost and durability. Furthermore, in the present invention, since the fluorine-based grease is applied to the surface of the black zinc plating,
The frictional force of each shutter blade is reduced by the application action of this fluorine grease, and a smooth shutter operation can be expected, and this fluorine grease does not produce a foul odor even when the lamp heats up, which causes environmental pollution. In addition, the high heat resistance provides the advantage that a smooth operation can be expected over a long period of time.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a conventional spotlight structure.

FIG. 2 is a rear view of FIG.

FIG. 3 is a front view showing a conventional iris unit.

FIG. 4 is a side view of FIG.

FIG. 5 is an explanatory diagram showing an arrangement of shutter blades and an operation state thereof.

FIG. 6 is a front view showing a shutter blade unit according to an embodiment of the present invention.

FIG. 7 is a plan view of FIG.

[Explanation of symbols]

41 ... Shutter blade unit 42 ... Cutting material 43 ... Black zinc plating 44 ... Fluorine grease

Claims (1)

[Claims] 1. A spotlight in which a lamp (3), an iris unit (5), a lens (6) and the like are arranged inside a case (1), and each shutter constituting the iris unit (5). A spotlight characterized in that the surface of a thin iron plate whose blades have flexible elasticity is plated with black zinc, and the surface of the black zinc plating is further coated with fluorine-based grease.