JPS5943745B2 - projection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a projection device for causing a projected image to move in a circular or elliptical manner.

BACKGROUND ART Generally, when moving a projected image of a projector along a circle, the projected image is placed at a position away from the center of rotation of a rotating disk, and the projected image is moved in a circular motion by rotating the rotating disk. However, it was not possible to make the projected image move in an ellipse.

OBJECTS The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a projection device that can cause a projected image to move in a circular or elliptical manner.

SUMMARY OF THE INVENTION The present invention provides an oval inner member that is rotatably provided about a predetermined rotation axis, and an oval inner member that is provided that is rotatable about the rotation axis and a part of which is in contact with the oval inner member. The projection device is characterized in that it is equipped with a projector that is shaped like a projector, and a drive means that rotates the inner elliptical member and the projector at a predetermined speed relationship, and causes the projected image from the projector to move in a circular or elliptical motion. .

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

FIG. 1 is a sectional view of the embodiment. A frame 1 is provided with a shaft 3 centered on a rotating shaft 2, and a cylindrical part 5 rotates on this shaft 3 via a pair of bearings 4. It is rotatably provided around an axis 2. As shown in FIG. 2, this cylindrical member 5 has an elliptical plate 6 having a major axis of 2a and a minor axis of 2b in the upper part, and a rotating member 8 having a gear 1 in the lower part, which is moved and fixed in the direction of the rotation axis 2 by a screw 9. It is set up so that it can be done. Further, a locking member 11 is provided at the upper end of the shaft 3 via a bearing 10 so as to be rotatable about the rotating shaft 2 . Further, the frame 1 is provided with an electromagnetic brake 12, and a shaft 14 whose one end is connected to an electromagnetic clutch 13 is connected to the electromagnetic brake 12 via a pair of bearings 15, 15. This shaft 14 is parallel to the rotating shaft 2, and a gear 16 that meshes with the gear T is provided below the shaft 14. This gear 16 is formed in such a width that it always meshes with the gear T even when it is moved along the rotation axis 2.
A ring-shaped mounting plate IT is provided, and the electromagnetic clutch 13 is provided on the lower surface of this mounting plate 17.

Further, a motor 18 is provided on the upper surface of this mounting plate 17, one drive shaft 19 of which has one force passing through the mounting plate 17 and connected to the electromagnetic clutch 13, and the other having the same pitch diameter as the gear 16. A gear 20 is provided. Furthermore, mounting plate 1
7 is provided with a ring gear 22 that is rotatable around the rotating shaft 2 via a bearing 21, and this ring gear 22 has teeth on its outer periphery with the same pitch diameter as gear 7, and has teeth on its inner periphery. A pair of pins 23, 23 are provided. As shown in FIG. 3, a mounting ring 24 is provided on the pins 23, 23 so as to be rotatable about a shaft 25 connecting the pins 23, 23. This mounting ring 24 has a shaft 25 orthogonal to the shaft 25.
A pair of pins 27, 27 are provided in six directions, and this pin 2
7 and 27 are provided to support the upper part of the projection rock 28 rotatably about the shaft 26. This projector 28 is provided so that its optical axis 29 passes through an intersection 30 between the axes 25 and 26 and the rotation axis 2, and a lamp 31. A condenser lens 32, an original plate 33, and a projection lens 34 are provided.

Further, a trace rod 35 is fixed to the lower part of the projector 28, and furthermore, the other end of a spring 36 whose one end is locked to the locking member 11 is locked to the lower part of the projector 28. It is provided so as to be in constant contact with the outer periphery. In addition, a retaining plate 38 is attached to the mounting plate 17 by screws 37.
is provided, and the auxiliary projector 41 is attached to the holding plate 38 through the opening 42 of the mounting plate 17 via the mounting band 40 with screws 39.
The projection direction can be adjusted by penetrating through the.

This auxiliary projector 41 has a lamp 43 similar to a known projector.
, condenser lens 44, original plate 45, projection lens 46
is provided. Note that 47 is the optical axis of the auxiliary projector 41. Next, the operation of the above embodiment will be explained.

First, the electromagnetic clutch 13 is turned off to disconnect the drive shaft 19 of the motor 18 and the shaft 14, and the electromagnetic brake 12 is turned on to prevent the shaft 14 from rotating.

This prevents the gears 16 and 7 from rotating, so the elliptical plate 6
is fixed. Next, when the motor 18 is turned on and the ring gear 22 is rotated via the gear 20, the projector 28 rotates around the rotating shaft 2 via the pins 23, 23 and the male pins 27, 27 of the mounting ring 2. . At this time, the projector 28
Since the trace rod 35 rotates while contacting the fixed elliptical plate 6, the projector 28 rotates around the rotating shaft 2 while drawing an ellipse with a ratio of the major axis to the minor axis a:b. As a result, the original plate 3 is projected onto the extension of the optical axis 29.
Image 3 moves while drawing an ellipse with the above ratio. Further, when an image is projected onto an extension of the rotating shaft 2 by the auxiliary projector 41, the state of the projected image of the projector 28 rotating around this projected image can be projected.

Furthermore, as shown in FIG. 4, the original plate 45 of the auxiliary projector 41 includes a central object 48 projected on the extension of the rotating shaft 2, such as Jupiter, and an image 49 projected by the projector 28, such as the moving trajectory 50 of Jupiter's satellites. If you use a drawing that depicts Jupiter, you can project Jupiter in the center and the satellites moving along their elliptical trajectories around it.

In this case, the original plate 45 is provided so that an ellipse whose trajectory 50 has the same major axis and minor axis as the ellipse that is moved and projected from the projector 28 can be projected. Next, the electromagnetic clutch 13 is turned on and the electromagnetic brake 12 is turned off, allowing the shaft 14 to be driven by the motor 18.

Then, when the motor 18 is turned on and the drive shaft 19 is rotated, the projector 28 swings around the rotation shaft 2 as described above. With one force, the gear 16 provided on the shaft 14 also rotates, and the elliptical plate 6 rotates via the gear 7. In this case, gear 16
Since the gear 20, the gear 7, and the ring gear 22 have the same pitch diameter, the projector 28 and the elliptical plate 6 rotate in the same direction and at the same angular velocity around the rotation axis 2. As a result, the abutting positions of the elliptical plate 6 and the tracing cup 35 do not change, so that the projector 28 makes an oscillating circular motion about the rotation axis 2. Therefore, the image projected by the projector 28 also moves in a circular motion. Further, when an image is projected onto an extension of the rotating shaft 2 by the auxiliary projector 41, the state of the projected image of the projector 28 rotating around this projected image can be projected. Furthermore, auxiliary projector 41
As in the case of FIG. 4, if we use a central object projected on the extension of the rotation axis 2, such as Jupiter, and an image projected by the projector 28, such as the movement trajectory of Jupiter's satellites, as the original plate, the center Jupiter is projected onto the screen, and the satellites can also be seen moving along their circular paths.

In this case, the original plate 45 is provided so that a circle whose trajectory has the same diameter as the circle projected by the projector 28 can be projected. In the above configuration, the angle θ when the projection rock 28 swings around the rotation axis 2 can be determined by loosening the screw 9, moving the rotating member 8 up and down along the circular shaft member 5, and tightening the screw 9. It can also be adjusted by providing a plurality of receiving holes C along the optical axis 29 for the pins 27, 27 that support the projector 28, and changing the mounting position.

Furthermore, it is also possible to intersect the elliptical plates 6. In this case, if you change to an elliptical plate with a different size without changing the ratio of major axis to minor axis, only the size of the projection iron will change, that is,
If the distance between the audience and the projected image changes, and the ratio of the major axis to the minor axis is changed to an elliptical board, the angle at which the audience views the projected image will change. Further, in the above embodiment, the projector 28 and the rotating member 8 are rotated by one motor 18, but it goes without saying that they may be rotated in synchronization by separate motors. Furthermore, by rotating the projector 28 and the rotating member 18 at different angular velocities using two motors, it is possible to project motions whose locus is a rotating ellipse as shown in FIG. It goes without saying that the objects to be projected are not limited to Jupiter's satellites and Jupiter, but may also be other celestial bodies or other objects.

Effects As described above, the present invention includes an elliptical inner member that is rotatably provided around a predetermined rotation axis, and an elliptical inner member that is rotatable about the rotation axis and a part of which is in contact with the elliptical inner member. A projection device comprising: a projector provided therein; and a driving means for rotationally driving the inner elliptical member and the projector at a predetermined speed relationship, and causing the projected image from the projector to move in a circular or elliptical motion. Because of this, it is possible to make a projected image move in a circular or elliptical direction using a single device with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of the first embodiment.
An enlarged perspective view of the main part of the embodiment shown in the figure, FIG. 4 is an auxiliary projector 41
FIG. 5 is an explanatory diagram of the original plate 45, and FIG. 5 is a diagram showing the projection locus. 2. Rotating shaft, 6: Elliptical plate, 7, 16, 20, 22: Gear, 8: Rotating member, 14: Shaft, 18: Motor, 28, 41
: Projector, 29, 47: Optical axis, 33, 45: Original plate, 35
: Trace rod, 36: Spring.

Claims (1)

[Claims] 1. An elliptical member rotatably provided around a predetermined rotation axis, and an elliptical member provided so as to be rotatable around the rotation axis and a portion of the ellipse member is in contact with the ellipse member. a projector and
A projection device comprising a driving means for rotationally driving the elliptical member and the projector at a predetermined speed relationship, and causing a projected image from the projector to move in a circular or elliptical motion. 2. The projection device according to claim 1, wherein the driving means drives the projector and the elliptical member around the rotation axis in the same direction and at the same angular velocity, thereby causing the projected image to move in a circular motion. . 3. The projection according to claim 1, wherein the driving means rotates the projector and the elliptical member around the rotation axis with a speed difference, thereby causing the projected image to move in an ellipse. Device.