JP2532079Y2 - Film projector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to a film projection device for enlarging and projecting a film image onto an image reading device.

<Prior Art> Conventionally, as this type of film projection apparatus, there is an apparatus as shown in FIGS. That is, in FIG. 4, the light emitted from the projection light source 2 illuminates the film F through the condenser lenses 3 and 4 together with the light reflected by the reflection mirror 1, and the illuminated image is projected by the projection lens 5 and the Fresnel lens 6
And a film set unit for holding a film F and a film illuminating unit comprising a reflection mirror 1, a projection light source 2 and condenser lenses 3, 4 via an image reading apparatus. The projection optical system unit including the projection lens 5 and the projection lens 5 is integrally attached to the upper main body unit 9, and the holding base 7 holding the Fresnel lens 6 is attached to the lower base unit 10 which is swingably mounted on the rotation shaft 7 a. The upper body 9 is rotatably supported by a rotating shaft 11 and is fixed by a rocking shaft 12 at the projection position shown in FIGS. The projection light source 2 is a film.
Since the rated power of 200 to 300 W is usually required to expand the size to about A6 size, and a large amount of heat is generated, the exhaust heat fan 13 is used to prevent the resin outer cover of the upper main body 9 and the film F from being thermally deformed. In order to discharge the hot air to the outside air, furthermore, for some reason, an abnormal situation in which the exhaust heat fan 13 stops while the projection light source 2 is turned on occurs,
The projection light source 2 and the projection light source driving mechanism disposed in the lower base portion 10 are provided to prevent the temperature inside the upper body portion 9 from rising, and to prevent the deformation of the outer cover and the occurrence of fire.
Middle of connection cable 16 connecting DC power supply 15 (projection light source 2
A thermoswitch 14 is provided at a position (closer), and a safety mechanism is provided to cut off the power supply to the projection light source 2 when the temperature reaches a certain level or higher.

When the film projector is not in use, the sixth
As shown in the figure, the holding arm 7 is turned clockwise by 90 ° in the drawing to be in the upright state, and then the lock shaft 12 is pulled forward, and the upper main body 9 is turned counterclockwise about the rotation shaft 11 by 90 degrees. °
When rotated, it is in the stowed state. In this state, the Fresnel lens 6 is sandwiched between the wall surface of the lower base portion 10 and the upper body portion 9, and the front and back surfaces of the Fresnel lens 6 are covered and touched or hit with a hand. And the Fresnel lens 6 is protected.

<Problem to be Solved by the Invention> By the way, in the conventional example described above, the projection light source 2 can be energized even in the housed state shown in FIG. 6, and if the projection light source 2 remains lit in the housed state. Even if an abnormal situation occurs in which the exhaust heat fan 13 stops, the projection light source 2 which is a heat source
Since the positional relationship between the thermo switch 14 and the thermo switch 14 for turning on the power is different from the normal use state by rotating 90 °, the state of heat propagation to the thermo switch 14 changes, and the thermo switch 14 operates to turn on the power. There was a drawback that the safety mechanism of cutting did not work.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a film projection apparatus which eliminates the above-mentioned drawbacks of the prior art and in which the projection light source is not turned on when the upper main body is housed in the lower base.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a film illuminating section having a projection light source, a film set section, a main body having a projection optical system, and movably supporting the main body. A film projecting device comprising: a base portion for controlling the power supply to the projection light source; and a manually operated switching member for controlling the energization of the projection light source, wherein the switching member is disposed on the base portion, and the switching member is connected to the main body portion. The power supply to the projection light source is stopped by being operated in conjunction with the moving operation to the storage position.

<Operation> In the film projection apparatus having the above configuration, the switching member for manual energization control is operated in conjunction with the movement operation of the main body part to the base part for storage, and the energization to the projection light source is stopped. Since the projection light source is not turned on in the housed state, a fire or the like due to heating can be prevented.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. The same components as those of the above-described conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, a seesaw type power switch 15a is provided on the front surface of the DC power supply 15 for driving the projection light source, and the holding switch 7 serving as a holding member of the Fresnel lens 6 turns off the power switch 15a in conjunction with the turning operation. This is provided with a projection 7b.

In the present embodiment having the above configuration, the power switch 15a is turned on by a user operation in the projection use state shown in FIG. 1, but when the film projection apparatus is stored, first, the holding arm as shown in FIG. 7 is rotated clockwise about the rotation shaft 7a by 90 ° to bring it upright, the projection 7b of the holding arm 7 pushes the power switch 15a to turn off the DC power supply 15 and The energization is stopped. afterwards,
Pulling the lock shaft 12 forward and rotating the upper main body 9 by 90 ° counterclockwise about the rotation shaft 11 completes the storage. In this stored state, as shown in FIG. 2, the user of the apparatus cannot turn on the power switch 15a again, and the power supply to the projection light source 2 remains stopped.

FIG. 3 shows another embodiment of the present invention. For the sake of simplicity, the same parts as those of the above-described embodiment are denoted by the same reference numerals, and only the differences will be described.

In this embodiment, the upper body 9 is slidably mounted on the lower base 10 so as to be slidable in the vertical direction.
At the time of storage, each slides downward, and a projection 9a for turning on and off a seesaw type power switch 15a of the DC light source 15 for projecting light source driving is provided below the rear end face of the upper body 9 in conjunction with the slide. is there. Other configurations are the same as those of the above-described embodiment.

In this embodiment having the above configuration, when the upper main body 9 is slid downward from the projection state, the projection 9a provided on the upper main body 9 hits the power switch 15a, turning off the power supply 15 and turning the projection light source on. The power supply to the lower base 10 is stopped and the power supply to the lower base 10 is stored. On the other hand, at the time of projection,
The power switch 15a is turned on by the protrusion 9a by sliding the switch upward. In this embodiment, the storage of the Fresnel lens 6 is performed by sliding the holding arm 7 along a groove (not shown) in the inner wall of the lower base portion 10 to a state as shown in FIG.

In the above-described embodiments, a seesaw switch is used as the power switch 15a, but a switch of another type such as a push switch may be used. Further, the projection light source 2 and the power supply can be connected without turning off the power switch used by the apparatus user.
A separate switch may be provided in the middle of the connection cable 16 connecting the cable 15 and the connection cable 16 to be turned off by the upper main body 9 or the holding member 7.

<Effects of the Invention> As described above, the present invention provides a film illuminating section having a projection light source, a film set section, a main body having a projection optical system, and a pedestal section movably supporting the main body. A film projection device comprising a manually operated switching member for controlling energization of the projection light source,
The switching member is disposed on the base portion, and the switching member is operated in conjunction with a movement operation of the main body portion to the storage position, so that the power supply to the projection light source is stopped. In the storage state of the part, the device can be miniaturized, and since the power supply control switching member, which is manually operated, is turned off and the projection light source does not turn on, an abnormal situation occurs such that the exhaust heat fan stops in the storage state of the main body part. Even so, there is an effect that it is possible to prevent heat deformation and fire of the exterior cover of the main body.

[Brief description of the drawings]

FIG. 1 is a schematic structural view of a film projector according to one embodiment of the present invention, FIG. 2 is a side view of the stored state, and FIG. 3 is a side view of a stored state of the film projector of another embodiment of the present invention. Figure,
FIG. 4 is a schematic structural view of a conventional film projector, and FIG.
The figure is a perspective view, and FIG. 6 is a side view of the stored state. 2 Projection light source, 5 Projection lens, 6 Fresnel lens, 7 Holding arm (holding member), 7b Projection, 9
…… Top body part, 9a …… Protrusion, 10 …… Bottom stand part, 13
... Exhaust heat fan, 14... Thermoswitch, 15... DC power supply for driving projection light source, 15 a.

Claims (1)

(57) [Scope of request for utility model registration] 1. A film illuminating section having a projection light source, a film set section, a main body section having a projection optical system, a pedestal section movably supporting the main body section, and energization of the projection light source is controlled. In a film projection apparatus comprising a manually operated switching member, the switching member is disposed on the base portion, and the switching member is operated in conjunction with a movement operation of the main body portion to a storage position, and the projection is performed. A film projector, wherein the power supply to the light source is stopped.