JPH07240102A - Floodlight - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the heat resistance of the aperture mechanism and focus control operability. A light source section (12) having at least a high pressure discharge lamp (32) and a reflection mirror (31) for reflecting light emitted from the high pressure discharge lamp in a predetermined direction, and a light source section (12).
The cutter 39 and the gobo holder 40 are interposed between the iris diaphragm mechanism 41 and the iris diaphragm mechanism 41 on the same optical axis O, and the iris diaphragm mechanism 41, the cutter 39, and the gobo holder 40.
And a lens unit 14 in which a source lens and a front lens are incorporated in a lens box 18 so as to be movable on the same axis as the optical axis O. The area around the focal portion 13 is exposed to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floodlight such as a spotlight for projecting and illuminating an arbitrary spot such as a studio or a stage.

[0002]

2. Description of the Related Art Conventionally, as an example of this type of projector,
For example, there is one described in Japanese Utility Model Publication No. 58-55527. As shown in FIG. 14, the projector 1 includes a lamp 2
The light radiated rearward from the light radiated from is reflected forward by the spherical mirror 3 centered on the lamp 2 and projected to the outside front through the lens 4. The lamp 2, the mirror 3, and the lens 4 are held by the lamp body 5 so that their centers are located on the optical axis.

Since the lamp 2 is a high-pressure discharge lamp, continuous dimming for directly controlling the lamp power is not easy because of the characteristics of the lamp. Also, when the lamp is lit or relit,
It takes a certain time for the gas vapor pressure in the lamp 2 to rise and reach the rated light intensity.

Therefore, the lamp 2 is turned on in advance, the light to the front of the lens 4 is blocked by the blind shutter 5, and the aperture control of the blind shutter 5 is changed as necessary. There is.

The blind shutter 5 is provided with a plurality of light-shielding blades 5a, 5b, ... 5n on the frame 6 in a multi-step manner and is rotatable, and the light-adjusting handle 7 is pivotally operated to be fully closed. The light can be adjusted by continuously changing the state.

In another conventional light projector, there is one in which a cutter and a gobo holder are interposed between a light source section containing a lamp and a lens section containing a lens.

[0007]

However, in such a conventional blind shutter 5 as described above, each of the light-shielding blades 5a.about.
Since all 5n open and close in the same direction, as shown in FIG. 15 (A), when each of the light-shielding blades 5a to 5n is opened obliquely with respect to the optical axis of the lamp 2 at a required angle, on the illuminated surface 8,
As shown in FIG. 15 (B), one end in the direction along the slope opening of each of the light-shielding blades 5a to 5b becomes bright, while a dark part 8a is formed at the other end opposite thereto, and the uniformity of brightness decreases. There is a problem to do.

Further, in the projector in which the cutter and the gobo holder are mounted, if the diaphragm mechanism is arranged in this vicinity,
It is considered that the diaphragm mechanism is seized due to the influence of heat from the lamp, and it has not been adopted at the same time as the cutter and the like.

Therefore, the present invention has been made in consideration of such a situation, and its purpose is to provide a diaphragm mechanism with high heat resistance,
An object of the present invention is to provide a light projector with good operability for focus adjustment.

Another object is to improve the heat dissipation of the light source box.

Still another object is to increase the uniformity of the brightness of the illuminated surface.

Another object of the present invention is to prevent electric shock when exchanging the light source and improve the safety of the light source exchanging work.

[0013]

The present invention is configured as follows in order to solve the above-mentioned problems.

The invention according to claim 1 of the present application (hereinafter, referred to as the first
Invention), a light source part in which at least a light source and a reflector for reflecting light from the light source in a predetermined direction are built in a box, and a cutter and a gobo holder are provided on the same optical axis between the light source part and the diaphragm mechanism. And a focus unit formed by integrating the diaphragm mechanism, the cutter, and the gobo holder, and a lens having a lens system installed in the box in a direction opposite to the light source unit with respect to the focus unit. Department,
And the periphery of the focal portion is exposed to the outside.

The invention according to claim 2 of the present application (hereinafter referred to as the second invention) is characterized in that the focal portion is rotatably attached to the lens box.

Furthermore, the invention according to claim 3 of the present application (hereinafter referred to as the third invention) is characterized in that the reflector is of a heat-shielding type that absorbs or transmits heat from the light source. To do.

Further, in the invention according to claim 4 of the present application (hereinafter, referred to as a fourth invention), the light source box is provided with a plurality of heat dissipation holes, and the openings of these heat dissipation holes are oriented in a predetermined direction. It is characterized in that it is different.

According to the invention of claim 5 of the present application (hereinafter referred to as the fifth invention), a blind shutter is provided close to the lens portion, and the blind shutter is provided with a pair of light-shielding blades facing each other. A notch that meshes with each other is formed in the portion, and a plurality of pairs of these light-shielding blades are arranged side by side so as to be openable and closable in a double-door shape.

Furthermore, the invention according to claim 6 of the present application (hereinafter referred to as the sixth invention) is an opening / closing sensor for detecting the opening / closing of the opening / closing lid of the light source box, and an open / closed state of the opening / closing lid by the opening / closing sensor. When it is detected, the power supply to the light source is stopped, and when the closed state of the opening / closing lid is detected, the control means is configured to re-power the light source after a lapse of a predetermined time.

[0020]

[Action]

<First to Sixth Inventions> Since the cutter and the gobo holder are interposed between the light source that emits heat as it emits light and the diaphragm mechanism such as an iris diaphragm that has a plurality of thin light-shielding blades that are easily deformed by heat, the light source is The heat from the can be absorbed or shielded by the cutter and the gobo holder. Therefore, it is possible to reduce or prevent the thermal deformation of the diaphragm mechanism, and at the same time, reduce the thermal deterioration and extend the life.

Further, since the periphery of the focus portion is exposed to the outside, the operability of the focus adjustment operation of this focus portion can be improved.

Further, since the focus unit has the cutter, the gobo holder and the diaphragm mechanism integrated with each other, the thickness is increased and it is easy to grasp by hand, and the operability of the focus unit is further improved.

<Second Invention> Since the focus portion is rotatably provided on the lens box, by rotating the focus portion, the manual operation portion can be appropriately oriented in any direction in advance.

In other words, since the projector is installed at any place and at any angle in terms of lighting, it is possible to orient the manual operation unit in a direction easy to operate by rotating the focus unit in advance. Therefore, the operability of the focus section can be further enhanced.

<Third invention> Since the reflector absorbs heat from the light source, the amount of heat transferred to the diaphragm mechanism having thin light-shielding blades, which easily undergoes thermal deformation, can be reduced accordingly.
Therefore, it is possible to reduce the thermal deterioration of the diaphragm mechanism and extend the life thereof.

<Fourth Invention> The plurality of heat dissipation holes of the light source box are oriented, for example, upward in the upper part of the light source box and downward in the lower part.

Then, since the downward opening heat dissipation hole becomes an intake hole and the upward opening heat dissipation hole becomes an exhaust hole, natural convection occurs in the light source box containing the heat generating light source to efficiently dissipate heat. Be done. That is, the heat dissipation effect is improved.

<Fifth Invention> Since each pair of the light-shielding blades of the blind shutter opens and closes in a double-door manner, only the light in the vertical direction is output from the opening of each pair of the light-shielding blades, and most of the light is emitted in the oblique direction. Be blocked. For this reason, it is possible to reduce or prevent the formation of a dark portion at one end of the illuminated surface, and increase the uniformity of brightness.

Further, since each pair of shading blades is formed with a notch such as a saw tooth which meshes with each other, light is emitted from the openings of the pair of shading blades at various angles according to the notch shape such as a saw tooth. By further increasing the light diffraction phenomenon, the uniformity of brightness can be further increased.

<Sixth Invention> When the opening / closing lid of the light source box is opened by exchanging the light source or the like, the opening / closing sensor detects the opened state, so that the control means stops the power supply to the light source.

Therefore, even if an attempt is made to replace the light source without interrupting (OFF) the power supply to the light source, electric shock can be prevented.

When the opening / closing lid is closed after the light source is replaced,
Since the open / close sensor detects the closed state, the control means restarts the power supply to the light source after a predetermined time has elapsed.

Therefore, after the replacement of the light source, the projector can be used without turning on the power supply switch of the light source.

[0034]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 13, the same or corresponding parts are designated by the same reference numerals.

FIG. 1 is a front view of an embodiment of the projector according to the present invention, FIG. 2 is a bottom view thereof, and FIG. 3 is a left side view thereof.
In these figures, the projector 11 has a light source unit 12, a focal unit 13, a lens unit 14, and a blind shutter 15 which are sequentially arranged on the same optical axis O in this order.
The lens bar 14 and the lens part 14 are disposed above and below the bar-shaped handle bar 16 and the U-shaped bottom frame 17, respectively.
(See FIG. 2) and are integrally connected in the lateral direction.

The lens portion 14 has lateral slide rails 19a and 19b fixed to the inner left and right outer surfaces (right end in FIGS. 1 and 2) of a rectangular cylindrical lens box 18, for example. The rails 19a and 19b for use in FIG.
As shown by, both ends of the U-shaped arm 20 are slidably fitted.

As shown in FIGS. 1 and 3, the arm 20 has a plurality of vertical slide holes 20a and 20b formed in the left and right legs in the axial direction, and these vertical slide holes 20a and 20b are formed.
By appropriately selecting b and screwing, the arm 20
The vertical length of the can be adjusted appropriately. Further, one end of the arm 20 is attached to the lens box 18 by the angle adjusting handle 21,
The angle at which the arm 20 is attached to the arm can be adjusted appropriately. A drop prevention wire 22 is connected to the arm 20.

The lens portion 14 is a prismatic lens box 1
Inside, the inner end side and the outer end side, while incorporating a not-shown original lens and a front lens, so as to be movable in the axial direction,
As shown in FIG. 2, an original lens moving knob 23 and a front lens moving knob 24 are attached to the outer bottom surface of the lens box 18, and the original lens and the front lens are rotated by rotating these lens moving knobs 23 and 24. Is moved in the axial direction of the lens box 18 so that the irradiation diameter size can be adjusted appropriately.

Further, these original lens and front lens lens moving knob 2
3 and 24 are fixed (locked) at their rotational positions by rotating the original lens and front lens lens movement lock levers 25 and 26 externally fitted on the outer periphery thereof as shown in FIG. 4 (A).
Alternatively, it can be semi-fixed as shown in FIG.

As shown in FIG. 5, the lens box 18 is provided with an elongated slit 27 in the axial direction, and the slit 27 is provided with a small triangular plate-shaped original ball and front ball movement index 28, 29. It is slidably mounted and indicates the moving position of the original lens and the front lens.

That is, as shown in FIG. 5, the original lens and the front lens are appropriately moved within the range from the small front lens position 29b to the small original ball position 28b to adjust the irradiation diameter. On the other hand, the irradiation diameter can be adjusted so as to be enlarged by appropriately moving in the range from the front lens large position 29a to the base lens large position 28a.

As shown in FIG. 1, the light box 30 has a plurality of heat dissipation holes 30c on its outer surface. The heat dissipation holes 30c are, for example, substantially U-shaped cut pieces inward. When the projector 11 is mounted so that the light source section 12 and the blind shutter 15 are arranged vertically, as shown in FIG. 1, the lower step portion is the intake hole 30c1 and the upper step portion is the exhaust hole. It is formed downward and upward so as to be 30c2.

The light source section 12 is, as shown in FIG.
A high pressure discharge lamp 32 built in a semi-elliptical spherical reflection mirror 31 and an energization controller 33 made up of a microcomputer or the like as a control means are built in a rectangular cylindrical light box 30. The high-pressure discharge lamp 32 is 575 W and is mounted on the mounting mount 34 in the light box 30, and the reflection mirror 31 is of a heat blocking type that absorbs heat generated from the high-pressure discharge lamp 32. The large-diameter open end of the light-shielding cylinder 35 having the shape of a truncated cone is concentrically and densely connected to each other.

The light box 30 has a main body 30a,
The open / close lid 30b at the rear end (the right end in FIG. 6) is openably and closably attached around the pair of left and right bottom hinges 36, and
A back lid 37 is attached to the back surface of the opening / closing lid 30b so as to be openable and closable. By opening these lids 30b and 36, the high pressure discharge lamp 32 can be replaced and its optical axis can be adjusted.

The light box 30 has a lid 3 for opening and closing the light box 30.
An opening / closing sensor 38 including a micro switch or the like for detecting opening / closing of 0b is built in, and an energization controller 33 is electrically connected to the opening / closing sensor 38.

When the open / close sensor 37 detects the opening of the open / close lid 30b, the energization controller 33 detects the high pressure discharge lamp 3
Since the energization of 2 is forcibly cut off, it is possible to prevent electric shock when the high pressure discharge lamp 32 is replaced.

When the open / close lid 30b is closed by the main body 30a after the high-pressure discharge lamp 32 is replaced, and the closed state is detected by the open / close sensor 38, the energization controller 33 counts a predetermined time and then the high voltage is reached. Energization of the discharge lamp 32 is restarted.

A cutter 39, a gobo holder 40, and an iris diaphragm mechanism 41 are arranged concentrically in this order at the small-diameter open end of the light-shielding cylinder 34 on the same optical axis. , 41 are integrally configured to form a focal portion 13, and the periphery of the focal portion 13 and the small-diameter tip portion of the light shielding tube 35 is exposed to the outside.

The cutter 39 is capable of reciprocating four cutter blades (not shown) in the vertical and horizontal directions of its optical axis along the direction orthogonal to the optical axis O and also in the plane perpendicular to the optical axis. , And the light emission opening is appropriately controlled to a triangular window or a window having a required shape.

The gobo holder 40 is for holding a gobo plate (not shown) in which a pattern of a desired shape such as a picture is punched out so that it can be freely inserted and removed from the outside.

The iris diaphragm mechanism 41 has a plurality of thin light-shielding blades (not shown) arranged radially along a direction orthogonal to the optical axis O so that the irradiation diameter is appropriately narrowed.

That is, as shown in FIG. 8, the fixing knob 41b, which slides in the circumferential direction on the outer peripheral edge of the iris diaphragm body 41a, is rotated in the opening (UNLOCK) direction to loosen the screw, When moved in the OPEN direction, the iris diameter increases. On the other hand, when the fixing knob 41b is moved in the closing direction, the diaphragm diameter is reduced, and the position can be fixed by tightening the fixing knob 41b in the closing position at the appropriate moving position. .

The focal portion 13 thus integrated is, as shown in FIG. 9, the inner end of the lens box 18 (the right end in FIG. 9).
Is rotatably attached to the rotary lock lever 42 so that its rotational position can be fixed by rotating the rotary lock lever 42 (see FIG. 10).

FIG. 11 shows the blind shutter 15
Shows a fully closed state of, for example, a pair of left and right light-shielding blades 44a and 44b in the drawing are rotatably erected in a rectangular frame 43 so as to open and close like a double door as shown in FIG. Notches such as saw teeth 45a and 45b, for example, are formed at the opposite ends of the pair of shading blades 44a and 44b so as to mesh with each other, and these pairs of shading blades 44a and 4b are formed.
4b are arranged side by side in the frame 32 in the lateral direction, and an unillustrated operating portion is opened / closed, so that each pair of light shielding blades 44a, 4a
4b are interlocked so that they are all opened and closed at the same angle.

Therefore, by operating this opening / closing operation portion, as shown in FIG.
When a and 44b are slightly opened, as shown by the one-dot chain line in the figure, as compared with the case where the tips of the light-shielding blades 44a and 44b are straight, the saw teeth 45a and 45 outside the one-dot chain line are formed.
Since light is also emitted from the plurality of triangular portions t of b, it is possible to increase the diffraction phenomenon of light, and to reduce or prevent the conventional bright and dark fringes by that amount, and to improve the uniformity of brightness. .

Further, as shown in FIG. 13, since each pair of the light-shielding blades 44a and 44b are opened and closed in a double-opening manner, most of the light is emitted to the front of the front as shown by the white arrow in the figure, and as in the conventional example. It is possible to prevent irradiation from obliquely forward. Therefore, it is possible to prevent a dark portion from being formed at one end of the illuminated surface, and to further enhance the uniformity of brightness.

Further, according to the present embodiment, the cutter 39 and the gobo holder are provided between the high pressure discharge lamp 32 that generates heat with light emission and the diaphragm mechanism 41 such as an iris diaphragm that has a plurality of thin light-shielding blades that are easily deformed by heat. 40 is interposed, heat from the high-pressure discharge lamp 32 can be absorbed or shielded by the cutter 39 and the gobo holder 40.
Therefore, the thermal deformation of the iris diaphragm mechanism 41 can be reduced or prevented, and further, the thermal deterioration can be reduced and the life can be extended.

Further, since the area around the focus section 13 is exposed to the outside, the operability of the focus adjustment operation of the focus section 13 can be improved.

Further, since the focus portion 13 integrates the cutter 39, the gobo holder 40, and the iris diaphragm mechanism 41, the overall thickness is increased and it is easier to grasp by hand.
The operability of the focal portion 13 is further improved.

Further, since the focus section 13 is rotatably provided on the lens box 18, by rotating the focus section 13, the manual operation section can be appropriately oriented in any direction in advance.

In other words, since the projector 11 may be installed in any place and at any angle in terms of the lighting effect, the entire manual focus unit 13 is rotated in advance to direct the manual operation unit to a direction in which it can be easily operated in advance. Can be placed.
Therefore, the operability of the focus section can be further enhanced.

Further, since the reflection mirror 31 absorbs the heat from the high pressure discharge lamp 32, the amount of heat transferred to the light-shielding blade of the iris diaphragm mechanism 41 which is likely to be thermally deformed can be reduced accordingly. For this purpose, the iris diaphragm mechanism 41
It is possible to extend the life by reducing the thermal deterioration of.

Further, the plurality of heat dissipation holes 30c of the light box 30 are, for example, upward exhaust holes 30c2 in the upper part of the light box 30 and downward intake holes 30c1 in the lower part.

That is, since the downward opening heat dissipation hole 30c1 serves as an intake hole, while the upward opening heat dissipation hole 30c2 serves as an exhaust hole, natural convection occurs in the light box 30 containing the high-pressure discharge lamp 32 that generates heat. As a result, heat is efficiently dissipated. That is, the heat dissipation effect is improved.

Further, since each pair of the light shielding blades 44a and 44b of the blind shutter 15 opens and closes in a double door shape, only the light in the vertical direction is output from the opening of each pair of the light shielding blades 44a and 44b, and the light is obliquely emitted. Idemitsu is blocked. For this reason, it is possible to reduce or prevent a dark portion at one end of the illuminated surface due to the oblique light, and improve the uniformity of brightness.

Further, since each pair of light-shielding blades 44a, 44b is formed with a notch such as a saw tooth which meshes with each other, light is emitted from the openings of the pair of light-shielding blades 44a, 44b in various directions such as a triangular portion t of a saw tooth. Since the light is emitted from an angle, it is possible to further increase the diffraction phenomenon of light and further improve the uniformity of brightness.

Furthermore, when the rear end portion 30b of the light box 18 is opened by replacing the high pressure discharge lamp 32 or the like,
Since the open / close sensor 38 detects the open state, power supply to the light source is stopped by the energization controller 33.

Therefore, even if an attempt is made to replace this lamp 32 without interrupting (OFF) the power supply to the high-pressure discharge lamp 32, electric shock can be prevented.

After replacing the lamp 32, the opening / closing lid 30b
When is closed, the open / close sensor detects the closed state,
The power supply controller 33 resumes power supply to the high-pressure discharge lamp 32 after a predetermined time has elapsed.

Therefore, after the replacement of the lamp 32, the projector 11 can be used without turning on the power supply switch of the lamp 32.

[0071]

As described above, according to the first to sixth inventions of the present application, between the light source that generates heat with light emission and the diaphragm mechanism such as the iris diaphragm having a plurality of thin light-shielding blades that are easily thermally deformed, Since the cutter and the gobo holder are interposed, the heat from the light source can be absorbed or shielded by the cutter and the gobo holder. Therefore, it is possible to reduce or prevent thermal deformation of the diaphragm mechanism, reduce thermal deterioration, and prolong the service life.

Further, since the area around the focus section is exposed to the outside, the operability of the focus adjustment operation of this focus section can be improved.

Further, since the focus portion has the cutter, the gobo holder and the diaphragm mechanism integrated with each other, the thickness is increased and it is easy to grasp by hand, and the operability of the focus portion is further improved.

Further, according to the second aspect of the present invention, since the focal portion is rotatably provided on the lens box, by rotating the focal portion, the manual operation portion can be appropriately oriented in any direction.

In other words, since the projector is installed at any place and at any angle in terms of lighting performance, it is possible to place the manual operation unit in a direction easy to operate in advance by rotating the focus unit. Therefore, the operability of the focus section can be further enhanced.

In the third invention of the present application, since the reflector absorbs heat from the light source, the amount of heat transferred to the diaphragm mechanism, which is easily thermally deformed, can be reduced accordingly. Therefore, it is possible to reduce the thermal deterioration of the diaphragm mechanism and extend the life thereof.

In the fourth invention of the present application, the opening directions of the plurality of heat dissipation holes of the light source box are reversed so that, for example, the upper part of the light source box faces upward and the lower part faces downward.

For this reason, since the heat dissipation hole having the downward opening serves as an intake hole, the heat dissipation hole having the upward opening serves as an exhaust hole.
Natural convection occurs in the light source box containing the light source that generates heat, and heat is efficiently dissipated. That is, the heat dissipation effect is improved.

In the fifth invention of the present application, since each pair of the light-shielding blades of the blind shutter is configured to be openable and closable in a double-door shape, only the light in the vertical direction is output from the opening of each pair of the light-shielding blades, Light emission in the direction is blocked. For this reason, it is possible to reduce or prevent the dark portion of the one end portion to the illuminated surface due to the oblique light, and it is possible to enhance the uniformity of brightness.

Further, since each pair of shading blades is formed with a notch such as saw teeth which mesh with each other, light is emitted from the openings of the pair of shading blades at various angles according to the notch shape such as saw teeth. , The light diffraction phenomenon is further increased. Therefore, the uniformity of brightness can be further increased.

According to the sixth aspect of the present invention, when the opening / closing lid of the light source box is opened by replacing the light source or the like, the opening / closing sensor detects the opened state, so that the control means stops the power supply to the light source.

Therefore, even if an attempt is made to replace the light source without interrupting (OFF) the power supply to the light source, electric shock can be prevented.

When the opening / closing lid is closed after the light source is replaced,
Since the open / close sensor detects the closed state, the control means restarts the power supply to the light source after a predetermined time has elapsed.

Therefore, after the replacement of the light source, the projector can be used without turning on the power supply switch of the light source.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a floodlight according to the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a left side view of FIG.

4A and 4B are enlarged views showing a fixed state and a semi-fixed state of the original lens, the front lens moving knob and the lock lever shown in FIG.

FIG. 5 is a partially enlarged view of the lens unit shown in FIG.

FIG. 6 is a vertical cross-sectional view of the light source unit along with the appearance of the focal point unit of the embodiment shown in FIG.

7 is an enlarged front view of the high pressure discharge lamp shown in FIG.

FIG. 8 is a perspective view of a fixing knob of the focal portion shown in FIG. 1 and the like and its peripheral portion.

9 is a plan view of the focal portion shown in FIG. 1 and the like.

FIG. 10 is an enlarged side view of the lock lever of the focal portion shown in FIG.

FIG. 11 is a front view of the prind shutter shown in FIGS.

FIG. 12 is a partially enlarged schematic view showing a partially opened state of the blind shutter shown in FIG. 11 and the like.

FIG. 13 is a schematic diagram showing a double-door open state of the blind shutter shown in FIG. 11 and the like.

FIG. 14 is a partially cutaway perspective view of a conventional example.

15A is a schematic diagram showing the operation of the conventional example shown in FIG. 14, and FIG. 15B is a diagram showing its illuminated surface.

[Explanation of symbols]

 11 Projector 12 Light Source 13 Focus Part 14 Lens 15 Blind Shutter 16 Handlebar 17 Bottom Frame 18 Lens Hox 19a, 19b Pair of Horizontal Slide Rails 20 Arms 21 Angle Adjustment Handle 23 Original Lens Lens Moving Knob 24 Leading Lens Moving Knob 25 original lens lens moving lock lever 26 leading lens lens moving lock lever 27 slit 28 original lens moving index 29 leading lens moving index 30 light box 30a light box body 30b opening / closing lid 30c heat radiating hole 30c1 intake hole 30c2 exhaust hole 31 reflecting mirror 32 high pressure Discharge lamp 33 Energization controller 34 Mounting mount 35 Light-blocking cylinder 36 Bottom hinge 37 Rear lid 38 Open / close sensor 39 Cutter 40 Gobo holder 41 Iris diaphragm mechanism 41b Fixing knob 42 Rotation lock lever 43 Shape frame 44a, 44b a pair of shutter blades 45a, 45b serrated

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display G02B 5/08 Z

Claims (6)

[Claims] 1. A light source section in which at least a light source and a reflector for reflecting light from the light source in a predetermined direction are incorporated in a box, and a cutter and a gobo holder are provided on the same optical axis between the light source section and a diaphragm mechanism. And a focus section that integrates the diaphragm mechanism, the cutter, and the gobo holder, and is disposed in the opposite direction to the light source section with respect to the focus section.
A lens system having a lens part built in a box, wherein the periphery of the focal part is exposed to the outside. 2. The light projector according to claim 1, wherein the focal portion is rotatably attached to the lens box. 3. The floodlight according to claim 1, wherein the reflector is of a heat-shield type that absorbs or transmits heat from the light source. 4. The light source box is provided with a plurality of heat radiating holes, and the opening directions of the heat radiating holes are made different in a predetermined direction. The floodlight described in. 5. A blind shutter is provided in the vicinity of the lens portion, and the blind shutter has cutouts meshing with each other formed at opposing end portions of a pair of light-shielding blades facing each other.
The floodlight according to any one of claims 1 to 4, wherein a plurality of pairs of these light-shielding blades are arranged side by side so as to be openable and closable for each pair so as to open and close. 6. An opening / closing sensor for detecting the opening / closing of the opening / closing lid of the light source box, and when the opening / closing sensor detects the open state of the opening / closing lid, the power supply to the light source is stopped while the opening / closing lid is closed. Control means for re-powering the light source after a lapse of a predetermined time when it is detected.
The floodlight according to claim 1.