JPH04160702A - Following spot light - Google Patents

Abstract

PURPOSE:To make a lighting member itself compact, and improve the operationability by forming a spot light with a movable cylindrical member having a convex lens and a fixed cylindrical member having a light source. CONSTITUTION:A lighting member consists of a movable cylindrical member B and a fixed cylindrical member A, and at least a convex lens 6' of an image forming lens group is fitted to the movable cylindrical member B, and other lens group and an aperture 3 and a light source 1 are housed in the fixed cylindrical member A, and a reflecting mirror 10 is provided at a crossing point of an optical axis of the fixed cylindrical member A side on an optical axis inside of the movable cylindrical member B. Furthermore, the reflecting mirror 10 is coupled with the movable cylindrical member B to be changed by 1/2 of an angle, at which the movable cylindrical member B is changed, against the fixed cylindrical member A. A lighting member is thereby made compact to restrict a limitation of a location at minimum, and a following spot light having the excellent operationability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a follow spotlight used on theater stages and television studios.

(Prior Art) Conventionally, a senon pin spotlight as shown in FIG. 8 has been used as a follower spotlight.

This xenon pin spotlight has a light source 22 inside the lamp body.
, an aperture 23, and an imaging lens group 24, and these are arranged on the optical axis.

(Problem to be Solved by the Invention) The above-mentioned xenon pin spotlight is a spotlight that projects an aperture, which is a secondary light source, using an imaging lens, so in order to obtain a light projection aperture of the same size, the projection distance is required. As the length increases, the lamp itself also becomes longer and larger. Therefore, there are restrictions on the installation location,
This requires the user to swing a long lamp to follow the performers on the stage, making it difficult to operate.

The present invention has been made in view of the problems of the conventional technology as described above, and its purpose is to miniaturize the lamp body, minimize restrictions on the installation location, and provide easy-to-operate follow-up lighting. The aim is to provide a spotlight for

(Means for Solving the Problems) The technical means taken by the present invention to achieve the above object is to configure a lamp body with a movable barrel and a fixed barrel, and to attach an imaging lens to the movable barrel. At least the front lens of the group is attached, the fixed barrel accommodates the other lens groups, an aperture, and a light source, and a reflecting mirror is provided at the intersection of the optical axis of the movable barrel with the optical axis on the fixed barrel side. In addition, the reflecting mirror is characterized in that the angle of the movable barrel relative to the fixed barrel is variable by 1/2 of the variable angle.

The above-mentioned fixed cylinder is not limited to being installed vertically, but may be installed horizontally, for example, parallel to the floor surface, and the movable cylinder is provided to intersect the optical axis within such a fixed cylinder.

Further, the mechanism for interlocking the reflecting mirror with the movement of the movable cylinder can be achieved by a combination of a gear train, a combination of a gear train and a chain or a timing belt, or a transmission means such as a link mechanism.

Further, the above-mentioned movable cylinder is not limited to being rotated manually, but may be remotely controlled by attaching an electric device or the like.

(Function) According to the above means, the light beam emitted from the light source housed in the fixed cylinder passes through the lens group provided in the fixed cylinder and enters the movable cylinder, and the light rays emitted from the light source housed in the fixed cylinder enter the movable cylinder. The light enters a reflective mirror, is emitted in a predetermined direction, and is irradiated through the front lens of the movable cylinder. When the movable barrel is moved in a direction that changes the angle it makes with the optical axis of the fixed barrel, the movable barrel moves in the same direction by an angle of 1/2 of the moving angle of the fixed barrel, and the optical axis moves. It is aligned on the center line of the cylinder.

(Effects of the Invention) Since the follow spotlight of the present invention has the above configuration, the size (length) of the movable cylinder used to vary the irradiation direction is smaller than that of conventional products. The size can be reduced to about half or less, enabling miniaturization and minimizing restrictions on the installation location.

Moreover, the length of the above-mentioned movable barrel is approximately half that of conventional products, and only a part of the lens group, a reflector, and an interlocking mechanism for the reflector are accommodated within the movable barrel. It is extremely lightweight compared to the total weight of a conventional xenon spotlight.
As a result, the irradiation direction can be changed quickly, and the operability can be greatly improved.

Also, although this method uses a reflector to change the direction of the light beam emitted from the light source and irradiate it, the reflector moves by an angle of 1/2 of the deflection angle of the movable cylinder and always aligns with the optical axis of the movable cylinder. Therefore, all you have to do is point the movable cylinder in the direction of irradiation (irradiation can be done in the same way as a conventional xenon pin spotlight).

Additionally, as mentioned above, the movable cylinder (movable part) is shorter in length and lighter in weight than the conventional model, allowing for quick response with a small power source and remote control. I can do it.

(Example) Embodiments of the present invention will be described below based on the drawings.

The drawing shows a follow spotlight in which a fixed cylinder is arranged vertically and a movable cylinder is arranged horizontally above the fixed cylinder. In the figure, A is the fixed cylinder, B is the movable cylinder, and the fixed cylinder is Inside the body A, there is a light source 1 equipped with an elliptical reflector 2, an iris shutter 3 serving as an aperture, a cutter 4, and a dimming shutter 5, and an imaging lens group 6 excluding the front lens 6°. A leg member 7 equipped with casters 8 is attached to the outside of the lower part of the fixed cylinder A in which the lens is accommodated, and is configured to be movable.

A front gate-shaped arm 9 is attached horizontally rotatably to the upper surface of the fixed barrel A, on which the imaging lens group 6 is arranged.
A movable cylinder B is attached to the arm 9 so as to be movable up and down.

The movable cylinder B is formed into a cylindrical shape with a substantially square cross section, and a flat reflecting mirror 10 is attached inside the movable cylinder B at a position intersecting the optical axis from the light source 1, and the reflected light reflected by the flat reflecting mirror 10 is irradiated with the movable cylinder B. The front lens 6° in the imaging lens group 6 is disposed at the front position in the direction, and the front lens 6
゛ is attached so as to be movable and adjustable in the front and rear directions along the optical axis.

Further, an opening I2 into which the lens barrel 11 of the imaging lens group 6 is fitted is formed in the peripheral wall of the movable barrel B facing the fixed barrel A, and there is an opening I2 between the front and rear edges of the opening 12 and the lens barrel II. A light shielding plate 13°+3' is attached to prevent light from leaking.

Furthermore, the rear inside of the movable cylinder B, that is, the front lens 6
A balance weight 14 is provided at a position opposite to the mounting position of , and the balance weight 14 moves in the front-rear direction as the front lens 6' moves back and forth to maintain balance.

The movement adjustment mechanism has a screw thread 17 (right-hand thread) for the front lens 6° and a thread (left-hand thread) in the opposite direction to the rear of a screw shaft 16 to which the holding frame 15 of the front lens 6' is screwed. 17' is formed, and the balance weight 14 is screwed into the screw thread 17° so as to prevent rotation, and the front lens 6° and the balance weight 14 move toward and away from each other by rotation of the screw shaft 16. It's Nishide.

Further, a plane reflecting mirror IQ disposed inside the movable cylinder B
is designed so that when the movable cylinder B is rotated in the vertical direction to change the angle θ formed with the optical axis of the fixed cylinder A, the movable cylinder B is moved in the same direction by an angle of 172 of the movement angle.

An example in which the interlocking mechanism of the plane reflecting mirror 10 is configured by a combination of gear trains is shown in FIGS. 2 to 4. Gear (A
) is fixed, and a gear (B) that meshes with the gear (A) is fixed to a shaft 19 rotatably supported by the movable cylinder B, and a gear (C ) is fixed, and a shaft 20 is fixed inside the movable cylindrical body B, and a gear (D) is attached to the shaft 20 so as to freely rotate, and is meshed with the gear (C). (D
) is meshed with a gear (E) fixed to a shaft 21 that rotatably supports the plane reflecting mirror 10 with respect to the movable cylinder B. The gear ratio of the above gear train is gear (A).
: Gear (B) -1: 1, Gear (B); Gear (C) =
1:1, gear (C): gear (D) = 1: I/2,
Gear (D): Gear (E) = 1: 1. As a result, the plane reflector moves by an angle of I/2 with respect to the vertical displacement of the movable cylinder B, and the front lens lens 6
The optical axis of the reflected light is always aligned with the optical axis of the reflected light. In addition, in the above configuration, the gear (D) is a plane reflecting mirror l.
This is an intermediate gear to make the direction of movement of O the same as the direction of movement of movable cylinder B, and when gear (C) and gear (E) are connected by a transmission means that does not cause slippage, such as a chain or timing belt, The gear E becomes unnecessary.

Therefore, the above-mentioned plane reflecting mirror 10 reflects the light beam from the light source 1 onto the center line of the front lens 6°, so that the movable cylinder B
In the horizontal state, it is held at an inclination of 45°, and when the movable cylinder B is moved 30° downward from the horizontal state, it moves by an angle of 1/2 of the movement angle (=15°), and the flat reflector has an inclination of 60°, and when the movable cylinder B is moved downward to 45°, the plane reflecting mirror 10 has an inclination of 67.5°. (
(Refer to FIGS. 5 to 7) With the above configuration, the movable cylinder B is shorter in length and lighter in weight than conventional products, and can be rotated smoothly.

Furthermore, the movable cylinder can be remotely controlled by attaching an electric device or the like. Possible means of control include direct control using a joystick or pushbutton operation on a console as in the past, or performing a specified operation while detecting the current state using a potentiometer or the like.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of the device according to the present invention, FIG. 2 is an enlarged cross-sectional view showing the support part of the movable cylinder, FIG. 3 is an enlarged plan view showing the interlocking mechanism of the plane reflector, and FIG. The figure is a schematic diagram of the same mechanism, Figures 5 to 7 are explanatory diagrams showing the interlocking relationship between the movable cylinder and the plane reflector, and Figure 8 is a diagram of a xenon pin spotlight conventionally used as a follower spotlight. FIG. In the figure, A: Fixed cylinder B: Movable cylinder 1: Light source 6: Imaging lens group 10: Reflector Patent applicant Marumo Electric Co., Ltd. Figure 8 Procedural Amendment 0. Incident. display
[zu... 1990 Patent Application No. 285521 2, Spotlight for following the name of the invention

Claims (2)

[Claims] (1) In a spotlight consisting of a light source, an aperture, and an imaging lens group, at least the leading lens of the imaging lens group is housed in a movable cylinder, and the other lens groups, the aperture, and the light source are housed in a fixed cylinder. , and a reflecting mirror is provided at the intersection of the optical axis of the fixed cylinder on the optical axis inside the movable cylinder, and the reflecting mirror changes the angle between the optical axes of the movable cylinder with respect to the fixed cylinder. A follow spotlight characterized in that when it is moved in a direction, it changes in conjunction with the angle of 1/2 of the movement angle. (2) The follower spotlight according to claim (1), wherein the horizontal rotation and vertical rotation of the movable cylinder can be remotely controlled by attaching an electric device or the like.