JPH0112867Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a parabolic mirror that makes a sound so that when an attempt is made to touch the virtual image of the parabolic mirror, a sound is emitted to give a surprise to the viewer.

As shown in Figure 1, the parabolic mirror is
A bowl-shaped outer frame 1 has an inner side 11 curved to a predetermined curvature and has a mirror finish, and an inner side 21 has a mirror finish with a predetermined curvature, and a circular lighting hole 22 is provided in the center of the upper part. A bowl-shaped outer frame 2 is joined at each peripheral edge. When an object (for example, a hard object, a bell, etc.) is placed at the bottom of the outer frame 1 through the lighting hole 22, the object 3 will move near the lighting hole 22 due to the light rays emitted from the outside and the light reflected from the inner surface. 3 virtual image 3A is formed. This virtual image 3A is a kind of illusion, so even if the viewer tries to touch it with his/her hand, it just feels hollow. Since parabolic mirrors produce such virtual images in unexpected positions, they are useful for crime prevention when used to display precious metal products in department stores, etc., and can also be used as audiovisual teaching materials in classrooms, and are already commercially available.

This idea uses a parabolic mirror like this to make the virtual image even more surprising by emitting a sound when the person looking at the virtual image reaches out their hand to touch it. The purpose is to provide a parabolic mirror that makes a loud sound.

This idea will be explained below.

Figure 2A is a front view of one embodiment of this invention;
Figure B is a side view of the parabolic mirror 4 shown in Figure 1 and the parabolic mirror 4.
For example, the glass has a circular lighting window 51 of an appropriate size, which allows light to enter the lighting hole 22 and touch the virtual image 3A of the object 3 formed near the lighting hole 22. an obstacle detection sensor 6 for detecting a hand or the like inserted into the lighting window 51; and an obstacle detection sensor 6 provided inside the outer box 5 outside the field of view of the lighting window 51 of the outer box 5. It is composed of a sound generation module 7. Note that the upper part from the center of the outer box 5 is transparent, and the lower part may be opaque so that the outer frame 2 of the parabolic mirror 4 is out of the field of view. In addition, the obstacle detection sensor 6 has an infrared light emitter 6 that emits infrared light 8, as shown in FIG.
A and an infrared receiver 6B that receives the infrared rays 8 from the light emitting unit 6A and converts them into electrical signals, and the sound generation module 7 converts the electrical signals from the infrared receiver 6B into audio. A power source 7 that supplies power to the sound generation circuit 7A that converts into a signal, the speaker 7B that converts the audio signal to sound, the infrared light emitting section 6A, the infrared light receiving section 6B, and the sound generation circuit 7A.
These elements are integrally made into a module and arranged at the bottom of the outer box 5.

In such a configuration, when the user normally looks through the lighting window 51 of the outer box 5, a virtual image 3A of the object 3 thrown into the parabolic mirror 4 appears near the lighting hole 22, as if the object 3 were It looks like it's floating in the sky. In addition, the infrared rays 8 emitted by the infrared emitter 6A reach the infrared receiver 7A, and the output voltage of the infrared receiver 7A remains at a constant level and does not change, so the sound generating circuit 7A does not operate and no sound is produced. . Therefore, when the viewer puts his/her hand into the lighting window 51 of the outer box 5 in order to touch the virtual image 3A of the object 3, the infrared rays 8 emitted from the infrared light emitting section 6A are blocked by the hand and do not reach the infrared light receiving section 6B. Due to this decrease in the amount of light, the infrared light receiving section 6B lowers its output voltage. Then, the sound generation circuit 7A operates to generate a predetermined audio signal continuously or intermittently, which is output to the outside through the speaker 7B. Then, when the user removes his hand from the lighting window 51 of the outer box 5, the infrared rays 8 emitted by the infrared light emitting section 6A reach the infrared light receiving section 6B again.
Since the output voltage of B is restored to a certain level, the output of the audio signal from the sound generation circuit 7A is stopped and no sound is emitted from the speaker 7B.

As described above, according to this invention, by generating sound in addition to the effect of the virtual image created by the parabolic mirror, it is possible to double the effect of surprising the viewer.

In addition, in the above embodiment, a light emitting/receiving element using infrared rays was used as an obstacle detection sensor that detects the user's hand, but an infrared emitting part and an infrared receiving element are used using a sonic-electric conversion element using ultrasound. A combination of an ultra-radio wave generating section and an ultra-radio wave receiving section may also be considered instead of the section. In addition, there is no special signal generation section for sensors such as an infrared light emission section or a super radio wave generation section.
A solar cell or the like may be used to detect whether or not the light from the lighting window of the outer box is blocked by the hand. Furthermore, the sound generation circuit may be provided with a timer so that once it starts operating, it does not stop operating until it finishes generating a single group of sounds, such as one sentence or several bars of melody. Furthermore, the obstacle detection sensor may be attached to the lighting window of the outer box, or may be attached to the lighting hole of the parabolic mirror. When the obstacle detection sensor is installed in the light hole of the parabolic mirror, the same effect can be obtained in other embodiments that are composed of the parabolic mirror, the obstacle detection sensor, and the sound generation module by removing the outer box. It is possible to obtain

[Brief explanation of the drawing]

Figure 1 shows the schematic configuration of the parabolic mirror, Figure 2
Figure A is a front view of an embodiment of this invention, Figure 2B is a side view thereof, and Figure 3 is a diagram showing a simple circuit configuration of the embodiment. 1, 2... Outer frame of parabolic mirror, 22... Lighting hole, 3... Object that is the source of the virtual image, 3A... Virtual image of object 3, 4... Parabolic mirror, 5... Outer box, 51
...Lighting section, 6...Obstacle detection sensor, 6A...
Infrared light emitting section, 6B...Infrared light receiving section, 7...Sound generation module, 7A...Sound generation circuit, 7B...
Speaker, 7C...Power, 8...Infrared.

Claims (1)

[Scope of utility model registration request] A parabolic mirror, an outer box that houses the parabolic mirror and has a lighting window, an obstacle detection sensor installed near the lighting window of the outer box, and a sensor connected to the obstacle detection sensor and connected to the lighting window. A parabolic mirror that produces sound, comprising a sound generating circuit provided inside the outer box outside the field of view.