JPH0731232Y2 - Desk-mounted compact projector - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk-mounted compact projector for setting and using a projection film for studying the ecology of insects.

[0002]

2. Description of the Related Art Conventionally, there are a desk-mounted projector main body having a projection opening and a projection film insertion portion, and a projection film (projection film for studying insect biology etc.) inserted in a film insertion hole of the projector main body. Projection lamp for enlarging and projecting one frame scene on the screen in front of the projection opening, and the first and second projection lamps
There is known a desk-top type compact projector including a convex lens and a film feeding mechanism incorporated in the main body.

[0003]

[Problems to be Solved by the Invention] The conventional small projector is equipped with a projection film for studying the ecology of insects.
This film image can be projected by enlarging it on the screen in front of the projection port for observation, but there is a problem that it cannot be used as an observation mirror with a magnifying glass for enlarging and observing the real thing seen on the projection film, such as a small insect, in the observation case. there were.

The object of the present invention is not only for use as a projector for projecting film images, but also for use as a viewing mirror for magnifying and observing a real thing, such as a small insect, seen on a projection film in an observation case. It is to provide a stationary small projector.

[0005]

In order to achieve the above object, a compact projector of the present invention comprises a desk-mounted projector main body 1 having a projection opening 5 and an insertion portion 6 for a projection film 13.
The projection lamp 8 and the first and second convex lenses 11 and 12 for enlarging and projecting a one-frame scene of the projection film 13 inserted into the film insertion hole 6 of the projector main body 1 and the main body 1 And a film feed mechanism 15 incorporated into the main body projection opening 5, a lens barrel 25 that can be moved back and forth and is detachable is provided in the front end opening 5a of the main body projection opening 5, and the second convex lens 12 is attached to the lens barrel 25. That is, the insertion opening 26 of the lens barrel 25 is provided in the upper wall portion of the main body 1, and the opening portion 27 is formed in the bottom wall portion of the main body 1 illuminated by the lamp. A detachable lid 28 for closing the opening is provided, and a transparent observation case 29 capable of accommodating an observation object 30 such as an insect is fitted and fixed to the center of the inner surface of the lid 28. To do.

[0006]

In the compact projector having the above construction, the lens barrel 25 is inserted into the front end opening 5a of the main body projection port 5, and the projection film 13 for studying the ecology of insects is set on the main body 1 as shown in FIG. When the projection lamp 8 is turned on, the image on the film 13 is magnified by the first and second convex lenses 11 and 12, and is projected on the screen in front of the projection opening 5 to be used as a small desktop projector. can do.

Further, the lens barrel 25 is detached from the main body projection opening 5 and inserted into the fitting insertion opening 26 in the upper wall portion of the main body, and the observed object 30 such as a small insect observed on the projection film 13 is shown in FIG. As described above, when the projection lamp 8 is put into the observation case 29 and the projection lamp 8 is turned on, the observation object 30 such as an insect restrained in the case 29 is used as an observation mirror for magnifying and observing with the convex lens 12 of the lens barrel 25. be able to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a synthetic resin half-molded product 1a, 1b.
2 is a rectangular box structure projector body configured by fitting and joining as shown in FIG.
The front wall light emitting port 2 in which 1 is fitted, and the tongue piece 4b which is opened and closed in the left-right direction with the pin supporting portion 4a of the base end frame portion 4 projecting forward of the light projecting opening 2 and the main body side surface pivoting portion 3 as a fulcrum. Cylindrical projection port 5 that is closed and locked as shown in FIG.
And a film insertion portion 6 formed by a slit cutout portion of the base end frame portion 4 of the projection opening 5, and a battery box 7 is fitted and fixed to the rear end portion of the main body 1.

In the battery box 7, two dry batteries 9 are provided for lighting a projection lamp 8 by operating a switch (not shown).
The lamp 8 is held by the lamp holding portion of the box 7 and projects into the main body inner chamber 10 through the center hole 10a in the rear end wall of the main body.

The projection film 13 inserted into the film insertion portion 7 of the main body 1 is an endless film having a large number of film feed holes (not shown). 1, second convex lens 1
1 and 12 are enlarged and projected on the screen (not shown) in front of the projection port 5 by the lamp lighting light.

Numeral 15 is a conventionally known film feeding mechanism for intermittently feeding the film 13 frame by frame. The film feeding mechanism 15 includes one side wall 14 of the main body and a fixed bracket 16.
An eccentric cam 18 which is pivotally supported (fixed in the main body 1 so as to face and separate from the one side wall 14 of the main body) and rotated by a manual operation of a handle 17, and a square hole 19 in which the eccentric cam 18 is loosely fitted. A film feed lever 23 having a horizontally elongated hole 21 slidably fitted to the projection 20 of the one side wall 14 of the main body and being pivoted so that the tip of the protruding rod 22 is engaged with and disengaged from the film feed hole by the rotation of the cam 18. Has been done.

Thus, in the present invention, in the small projector having the above-mentioned structure, the lens barrel 25, which can be moved back and forth and is detachable, is provided at the front end opening 5a of the main body projection opening 5, and the lens barrel 25 is provided with the first lens barrel 25. The second convex lens 12 is fitted, the fitting opening 26 of the lens barrel 25 is provided in the upper wall portion of the main body 1, and the rectangular opening 27 is formed in the bottom wall portion of the main body 1 illuminated by the lamp. Then, a detachable lid 28 for closing the opening is provided in the opening 27, and a transparent observation case 29 capable of accommodating an observation object 30 such as an insect is attached to and detached from the inner central recess 28a of the lid 28. It is characterized by being fitted and fixed as much as possible.

The lid 28 has a rear end hole 31 at the bottom of the main body.
Rear end insertion portion 32 which is removably inserted into the desk, and a desk top surface 33
Front side both side leg portions 34 that abut on the lid body leg portion 3
4 and the both side leg portions 35 at the rear end of the main body 1 shorter than the leg portions are configured so that the main body 1 can be installed in an inclined state as shown in FIGS.

[0015]

Since the small projector of the present invention has the above-mentioned construction, it can be used as a projector for projecting film images, and can be used as an observation case for real objects, such as small insects, seen on a projection film. It can be used as an observation mirror for inserting and magnifying.

[Brief description of drawings]

FIG. 1 is a central vertical cross-sectional view showing a small-sized projector mounted on a desk according to an embodiment of the present invention with a projection film set.

FIG. 2 is a cross-sectional plan view taken along the line AA of FIG.

FIG. 3 is a central vertical cross-sectional view showing a small projector of the present invention in a state where an observation mirror is used.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Projector main body, 2 ... Projector opening of main body front wall, 5 ... Main body projection opening, 5a ... Front end opening of projection opening, 6 ... Film insertion section,
7 ... Battery box, 8 ... Projection lamp, 11 ... First convex lens, 12 ... Second convex lens, 13 ... Projection film, 1
5 ... Film feeding mechanism, 25 ... Lens barrel, 26 ... Lens barrel fitting / inserting port, 27 ... Main body bottom wall opening, 28 ... Lid, 2
9 ... Observation case, 30 ... Observation object such as insect.

Claims (1)

[Scope of utility model registration request] 1. A projector-installed projector main body having a projection opening and a projection film insertion portion, and a single-frame scene of the projection film inserted through the film insertion hole of the projection projector main body is enlarged and projected on a screen in front of the projection opening. A desk-mounted compact projector equipped with a projection lamp, first and second convex lenses, and a film feeding mechanism incorporated in the main body, wherein a lens barrel that can be moved back and forth and is attached to and detached from a front end opening portion of the main body projection port. And that the second convex lens is fitted in the lens barrel, a fitting hole for the lens barrel is provided in the upper wall of the main body, and an opening is formed in the bottom wall of the main body illuminated by the lamp. Then, a detachable lid for closing the opening is provided in this opening, and a transparent observation case capable of accommodating an object to be observed such as insects is fitted and fixed to the center of the inner surface of the lid. Desktop installation type characterized by Small projector.