JP2010004836A - Underwater observation means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater observation apparatus that is lightweighted, easy to carry, and easy to operate. <P>SOLUTION: The underwater observation means is equipped with underwater imaging means 12, image-displaying means 14 on the water surface for receiving image signals from the underwater imaging means for display, cable-like transmitting means 16 for transmitting the image signals from the underwater imaging means to the image-displaying means on the water surface and elongated holding means 18 extending from the image-displaying means on the water surface for hanging down the underwater imaging means from the vicinity of the tip thereof, where the underwater imaging means 12 is provided with a camera body 22 and the image-displaying means 14 on the water surface has a display 70 for displaying the image signals transmitted from the camera body 22 of the underwater imaging means 12 and a winding means 76 for winding the transmitting means 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an observation means for observing an underwater situation, and more particularly to an underwater observation means used by, for example, a fishing person to observe an underwater fish situation.

When collecting aquatic organisms using fishing tools and fishing gear in the conventional technology, the state of underwater is not understood at all, so to speak, only traditional intuition and experience so that the thread hangs down in the dark world. As a matter of fact, the work was carried out in the form of deciding where to collect and taking time to wait for the fish to come, without knowing whether or not the fish and other aquatic organisms really exist. Here, even if the use of a conventional fish finder is considered, it is only possible to determine the presence or absence of a group of fish, and it is not possible to grasp the individual status of each aquatic organism. It is also impossible to grasp the underwater operation status of fishing gear.
In this way, conventional fishing gear and fishing gear have been tried and errored without knowing the status of aquatic organisms corresponding to the fishing gear or fishing gear and the operating status of aquatic life in the environment where the fishing gear or fishing gear is installed. Was repeated to collect inefficient collection work.
Therefore, in order to solve such problems, it is possible to collect aquatic organisms such as fishing while sequentially grasping the operation status of individual fishing gear and fishing gear underwater and the correspondence status with aquatic organisms. Remote monitoring devices have been proposed.

Japanese Patent No. 2735313

However, the conventional apparatus is a large apparatus that is relatively heavy, inconvenient to operate, and lacks feasibility.
Therefore, a main object of the present invention is to provide an underwater observation apparatus that is lightweight, easy to carry, and easy to operate.

In order to achieve the above object, an underwater observation apparatus according to the present invention includes an underwater image pickup means for taking an image by being submerged in water, a water image display means for receiving and displaying a video signal from the underwater image pickup means, Cable-like transmission means for transmitting a video signal from the underwater imaging means to the water image display means, and the water image display means are held on the front side, and the transmission means is extended from the water image display means and from the vicinity of the tip thereof to the water. An elongate holding means for suspending the imaging means, and the underwater imaging means includes a camera body, an underwater imaging body body that houses the camera body, and an attitude control body that sinks in water and controls the attitude. The above-mentioned water surface image display means includes a display for displaying a video signal transmitted from the camera body of the underwater image pickup means, a display operation unit for operating the display, and the display A power supply unit for supplying electric power, a winding unit for winding up the transmission unit, and the display unit, the display operation unit, the power supply unit, and the winding unit are integrally attached to the long holding unit. The elongated holding means has transmission means movement assisting means for moving the transmission means toward the proximal side and toward the distal end side.
The underwater observation means according to claim 2 of the present invention is characterized in that the aerial image display means includes a winding means having a rotating body formed so as to wind the transmitting means, and a long holding means for rotating the rotating body. A rotating body support means for fixing to the rotating body supporting means, and a display means main body fixed to the display body and the display operation section, and connected to the rotating body support means so as to face the rotating body of the winding means. The underwater observation means according to claim 1 provided.
In the underwater observation means according to claim 3 of the present invention, the rotating body support means is a cylinder or a columnar shape, a mounting bracket is fixed at one end thereof, and the display means main body of the surface image display means is supported at the other end. The underwater observation means according to claim 2, wherein the attachment fitting is formed so as to be fixed to the elongated holding means.
In the underwater observation means according to claim 4 of the present invention, the rotating body constituting the winding means of the water image display means is a hemispherical dish type with the center bulging, and the display means body of the water image display means includes: 4. The underwater observation means according to claim 2, wherein a region facing the rotating body has substantially the same outer shape, and is formed so as to wind a transmission means between surfaces having a bulged center. 5.
According to a fifth aspect of the present invention, in the underwater observation means, the display device body for fixing the display device and the display operation unit is fixed to the transmission means winding body and the transmission means winding body. A display holding body for fixing the display and the display operation unit, and the transfer means winding body is formed to be fixed along the outer peripheral edge of the display holding body. 5. The underwater observation means according to claim 1, wherein a rotation knob for rotating the transmission means winding body is formed on the body and / or the display holder.

According to the present invention, by sequentially observing underwater conditions in real time, it is possible to efficiently collect underwater organisms based on an image showing the underwater conditions.
According to the second aspect of the present invention, the surface image display means includes a winding means having a rotating body formed so as to wind the transmission means, and the rotating body is rotatably fixed to the long holding means. And a display unit main body fixed to the display unit and the display operation unit, and connected to the rotating body supporting means so as to face the rotating body of the winding means. The underwater imaging means can be easily submerged in the water or raised from the water by rotating the winding means of the surface image display means and extending or winding the transmission means.
According to the third aspect of the present invention, the rotating body support means has a cylindrical or columnar shape, and a mounting bracket is fixed at one end thereof, and is formed so as to support the display means main body of the water image display means at the other end. Since the mounting bracket is formed so as to be fixed to the long holding means, the water image display means is simply fixed to the long holding means so that the underwater observation can be performed quickly. Can do.
According to invention of Claim 4, the rotary body which comprises the winding-up means of a surface image display means is a hemispherical dish type | mold which the center expanded, The display means main body of a surface image display means is the said rotation body. Since the opposing regions have substantially the same outer shape, and the transmission means is formed so as to be wound between the bulged surfaces of the center, the transmission means is rotated by rotating the winding means of the water image display means. The underwater imaging means can be easily submerged in the water or raised from the water by stretching or winding it up.
According to the invention of claim 5, the display device body for fixing the display device and the display operation section is fixed to the transmission means winding body and the transmission means winding body. A display holder that fixes the display operation unit, and is configured to fix the transmission means winding body along the outer peripheral edge of the display holder, and the transmission means winding body and / or Since the rotation knob for rotating the winding means of the transmission means is formed on the display holder, the transmission means is extended or wound by rotating the winding means of the surface image display means. The underwater imaging means can be easily submerged or raised from the water.

  The above-described object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.

  The underwater observation means 10 according to the present invention includes an underwater image pickup means 12 that is submerged in water and picks up an underwater situation, and a water image display means 14 that receives and displays a video signal from the underwater image pickup means 12 on the water. A cable-like transmission means 16 having, for example, an optical fiber for transmitting a video signal from the underwater imaging means 12 to the water image display means 14, a water image display means 14 held on the front side, and the transmission means 16 And a long holding means 18 for extending from the water image display means 14 and hanging from the vicinity of the tip.

As shown in FIGS. 16 and 17, the underwater imaging means 12 sinks the camera body 22, the illuminating unit 24, the underwater imaging body body 26 that houses the camera body 22, and the underwater imaging means 12 into the water and takes a posture. And an attitude control body 28 to be controlled.
The camera body 22 includes an image sensor such as a charge coupled device (CCD) or a CMOS image sensor, and converts an image signal captured by the image sensor into a transmission signal for optical communication, and an image signal controller. And a light emitting element that converts the transmission signal into an optical signal.

  The illumination unit 24 is for illuminating an imaging region by the camera body 22. Due to the presence of the illumination unit 24, imaging by the camera body 22 is possible even in a dark place. Further, the brightness of the illumination unit 24 can be remotely operated by key input of the operation unit 90 shown in FIG.

As shown in FIGS. 16 and 17, the underwater imaging body body 26 includes a cover body 30 and a cover front body 32.
The cover body 30 has a substantially cylindrical hollow shape, and is configured to accommodate the camera body 22 therein. At the rear end, the end of the transmission means 16 is inserted and connected to the camera body 22. A means fixing portion 34 is formed, and a screw portion 30a and a collar portion 30b for fixing the cover front body 32 are formed at the front end.
The transmission means fixing portion 34 includes a screwing convex portion 36 protruding from the center of the outer circumference of the cover body 30, a cord blind plug 38 screwed to the screwing convex portion 36, and an O-ring 40a. . The screw projection 36 has a through hole for inserting the transmission means 16 in the center thereof, and the cord blind plug 38 has a through hole for inserting the transmission means 16 in the center thereof.
The cord blind plug 38 is screwed into the threaded convex portion 36 in a state where the transmission means 16 is inserted into the through hole, and an O-ring 40a interposed between the threaded convex portion 36 and the cord blind plug 38. It is in close contact with and is given waterproofness.

  The cover front body 32 has a substantially cylindrical shape and includes an annular collar-shaped pressing portion 32a on the front surface, and a circular translucent portion 32b on the inner side of the pressing portion 32a. A screw portion 32 c is engraved on the inner surface of the body portion of the cover front body 32 so as to be screwed with a screw portion 30 a formed on the outer peripheral surface of the front end of the cover body 30.

The cover body 30 is hermetically fixed to the tip peripheral surface of the transmission means 16, and the center of the image pickup surface of the CCD image pickup device is aligned with the center of the light transmitting portion 32 b of the cover front body 32. It arrange | positions in front of the transparent plate 33 which consists of transparent plastics, such as circular glass or an acryl, and fixes through the O-ring 40b.
The cover body 30 covers the CCD image pickup device, the image signal control unit, and the light emitting device, and is fixed to the cover front body 32 in an airtight manner. At this time, the center portion of the light transmitting portion 32 b of the cover front body 32 that fixes the transmission means 16 is arranged so as to be concentric with the transmission means 16.
The cover body 30 and the cover front body 32 form a waterproof cover of the camera body 22. The cover front body 32 is screwed to the front end of the cover body 30, and the rear end surface is the outer periphery of the front part of the cover body 30. It is tightly fixed to the flange portion 30b protruding from the surface.

A substantially cylindrical weight fixing sleeve 42 projects from the lower portion of the cover body 30 so as to extend in the front-rear direction of the cover body 30, and the front ends of a pair of front and rear weights 44 a and 44 b constituting the attitude control body 28. Adhesive is attached to the protrusions, and the weights 44 a and 44 b are inserted and fixed from the front and rear of the weight fixing sleeve 42.
The weights 44a and 44b constituting the posture control body 28 are attached only to the lower portion of the cover body 30 because there is air inside the underwater imaging body body 26, and when the underwater imaging means 12 is inserted and submerged, Due to the buoyancy of air in the cavity of the cover body 30, the cover body 30 becomes the upper part, and the cover body 30 is configured not to fall sideways.

The cover body 30 is provided with a substantially square plate-like ladder mounting portion 46 so as to protrude from the upper portion of the cover body 30 in the front-rear direction of the cover body 30. A ladder 50 that constitutes the posture control body 28 is fixed to the ladder attachment portion 46.
The ladder 50 is formed by integrating a thin plate-like front side ladder piece 52a and a thin plate-like back side ladder piece 52b, and has an airfoil shape that becomes thinner toward the rear, and has a thin plate-like shape with the front side ladder piece 52a. A groove 54 for fitting the transmission means 16 is formed on the facing surface facing the back side ladder piece 52b.
Then, the transmission means 16 is configured to be guided to the transmission means fixing portion 34 of the cover body 30 through the groove 54, and the front side ladder piece 52a and the back side ladder piece 52b are combined and bonded into the groove 54. The transmission means 16 is fixed by the agent to enhance the waterproof effect.
The front-side ladder piece 52a and the back-side ladder piece 52b are substantially similar in shape, but a ladder connecting portion 52c for fixing to the ladder attaching portion 46 protrudes from the upper rear end of the back-side ladder piece 52b. The back side ladder piece 52b is fixed with screws by joining the ladder connecting portion 52c to the surface of the ladder attaching portion 46.
The front side ladder piece 52a and the back side ladder piece 52b have a semicircular cross section so as to cover the cord blind plug 38 at the lower end of the lower end, and are provided with a recess along the outer shape of the cord blind plug 38. 52d and a cover part 52e.

  As shown in FIGS. 2 to 15, the water video display means 14 includes a display 70 that displays a video signal transmitted from the camera body 22 of the underwater imaging means 12, and a display operation that controls the display 70. A control unit 72; a power source unit 74 for supplying power to the display unit 70; a winding unit 76 for winding up the transmission unit 16; and the display unit 70, the display operation control unit 72, and the power source unit 74. An attaching means 78 for attaching the take-out means 76 integrally to the elongated holding means 18 is provided.

The winding means 76 of the water image display means 14 has a rotating body 80 formed so as to wind up the transmission means 16.
Further, the water image display means 14 includes a display means main body 82 for fixing the display 70 and the display operation control unit 72.

As shown in FIG. 13, the rotator 80 is a hemispherical dish having a bulged center, and a flat substantially circular insertion hole 80a is formed in the center thereof, and the outer periphery of the insertion hole 80a is substantially cylindrical. The transmission means winding portion 80b protrudes upward.
A disc-shaped seat portion 80c along the outer peripheral edge of the transmission means winding portion 80b protrudes inward from the outer peripheral edge of the transmission means winding portion 80b.
The seat portion 80c is formed to have a flat upper surface so as to come into contact with the lower surface of the planar region of the transmission means winding body 84, and a bolt for fixing the rotating body 80 to the transmission means winding body 84. A hole 80d for inserting a fixing tool 130 such as a washer is formed, and a protrusion 80e is formed on the upper surface thereof so as to be fitted into the recess 84c of the transmission means winding body 84.
Further, the rotary body 80 is inserted around the rotary body support means 100 by inserting the rotary body support means 100 constituting the attachment means 78 for fixing the rotary body 80 to the elongated holding means 18 into the insertion hole 80a. Fixed to rotate freely.

The winding means 76 is formed in a display means body 82 to which the display 70 and the display operation control unit 72 are fixed. That is, the display means main body 82 includes a transmission means winding body 84 connected to the rotating body support means 100 so as to face the rotating body 80 of the winding means 76.
The rotating body 80 that constitutes the winding means 76 of the surface image display means 14 is a hemispherical dish shape with the center bulging, and the transmission means winding body 84 of the display means body 82 of the surface image display means 14 is The rotating body 80 is a hemispherical dish having substantially the same outer shape as the rotating body 80. The rotating body 80 and the display means main body 82 bulge from the outer peripheral edge toward the center, and the rotating body 80 and the display means main body 82 face each other. The inner surface is flat, and the transmission means 16 is wound between the flat opposing surfaces.

The display means main body 82 is fixed to the transmission means winding body 84 constituting the winding means 76 and the transmission means winding body 84, and a display holder holding the display 70 and the display operation control unit 72. 86.
The transmission means winding body 84 is provided with a transmission means insertion hole 84 a for inserting the transmission means 16 in the vicinity of a region where the rotating body support means 100 contacts. Further, a stepped portion 84b for fitting and fixing the display holder 86 is recessed on the inner surface of the outer peripheral edge, and the rotating body 80 is formed on the outer surface in the vicinity of the region in contact with the rotating body support means 100. A recess 84c for inserting the protrusion 80e is provided.
The indicator holder 86 has a substantially disk shape with an outer peripheral edge along the outer peripheral edge of the transmission means winding body 84, and is waterproofed by a fastener 132 such as a bolt / O-ring with a packing 85 interposed therebetween. It is closely fixed to the stepped portion 84b of the transmission means winding body 84 so as to have properties.
Thus, the rotating body 80, the transmission means winding body 84, and the display device holding body 86 are integrally fixed, and the rotating body 80 and the transmission means winding body 84 supported by the rotating body support means 100. The display device holding body 86 rotates around the upper surface of the rotating body support means 100 constituting the attachment means 78 (described later).
The transmission means winding body 84 is formed so as to be fixed along the outer peripheral edge of the indicator holding body 86, and the transmission means winding body 84 and / or the display body holding body 86 are provided with the transmission means winding body 84. A rotation knob 88 for rotating is formed. As shown in FIG. 8, the rotation knob 88 is rotatably attached to a knob attachment portion 86b provided on the outer peripheral edge of the display device holder 86 by a shaft 88a.

The display device 70 is constituted by, for example, a liquid crystal display device (LCD).
The display unit 70 is connected to the transmission unit 16 and displays an image captured by the camera body 22 of the underwater imaging unit 12.
Further, the display device 70 is configured to be provided with a hood 92 as shown in FIGS. 7 and 8 in order to facilitate confirmation of the screen by the user. The hood 92 is generally composed of a truncated conical cylinder, and is configured so that the screen of the display 70 can be seen from the upper opening 92a.
Further, as shown in FIG. 5, the operation unit 90 is provided in the display unit 70 and has a plurality of keys including a power switch. The operation unit 90 inputs remote operations such as attitude control and zoom control of the underwater camera body 22 and illumination control of the illumination unit 24 described later.

  The power supply unit 74 is configured to supply power by loading a battery into a battery loading unit 86 a that is recessed in the display holder 86, which constitutes the display means main body 82. The battery loading portion 86a is covered and waterproofed with a power supply lid 94 and a packing 95.

The rotating body support means 100 has a cylindrical or columnar shape, and a mounting bracket 102 is fixed at one end thereof, and is formed so as to support the display means main body 82 of the surface image display means 14 at the other end. 102 is formed so as to be fixed to the elongated holding means 18.
The rotating body support means 100 is fixed to the mounting bracket 102 by a fixture 134 on the lower surface thereof so as to rise perpendicularly to the upper surface of the mounting bracket 102, is inserted into the insertion hole 80a of the rotating body 80, and is transmitted on the upper surface thereof. It is formed so as to contact the lower surface of the means winding body 84.
On the outer peripheral surface of the cylindrical body portion of the rotating body support means 100, a plurality of ridges 100a having a semicircular cross section extending in the longitudinal direction thereof are provided protruding at appropriate intervals. Further, a projecting ridge 100b having a semicircular cross section is formed in an annular shape along the upper edge of the body portion at the upper end edge of the body portion of the cylindrical body of the rotating body support means 100.
Thus, the rotator support means 100 is inserted into the insertion hole 80a of the rotator 80 so that the rotator 80 can be smoothly rotated, and in contact with the lower surface of the transmission means winding body 84, The means winding body 84 can be smoothly rotated.

The elongated holding means 18 includes a guide rod 110 and a transmission means guide 112 attached to the guide rod 110.
As shown in FIG. 2, the guide rod 110 includes a concave portion 110 b for inserting and fixing a convex portion 72 a protruding from the outer peripheral edge of the mounting bracket 102 in the vicinity of the grip portion 110 a on the hand side.
The transmission means guide 112 constitutes a transmission means movement assisting means for moving the transmission means toward the hand side and toward the distal end side, and includes an annular portion for inserting the cable-shaped transmission means 16.
Thus, the floating image display means 14 is fixed to the long holding means 18 by inserting and fixing the mounting bracket 102 into the recess 110b.

In order to operate this embodiment configured as described above as a tool used to collect fish and the like in the water, the following procedure is used.
(1) While the operator holds and supports the end of the long holding means 18, the transmission means 16 connected to the underwater imaging means 12 is dropped into the water from the tip of the long holding means 18.
(2) Due to the action of the weights 44a and 44b attached to the tip of the underwater imaging means 12, the transmission means 16 extends from the tip of the elongated holding means 18 into the water substantially perpendicular to the water surface.
(3) The underwater imaging unit 12 connected to the transmission unit 16 captures an underwater state, and the information is transmitted to the display 70 of the floating video display unit 14 at the operator's hand through the transmission unit 16. Reportedly.
(4) The operator observes the image picked up by the underwater image pickup means 12 displayed on the display unit 70 of the surface image display means 14 and determines whether there are fish in the water nearby.
(5) When it is found from the underwater state captured by the underwater image capturing means 12 that there is no fish in the place, the collection place is changed.
In this way, in this embodiment, the fish can be collected more effectively because the invitation operation to the fish can be performed while watching the state of the fish in the water as an image.

It is a whole block diagram which shows schematic structure of the underwater observation means concerning this invention. FIG. 2 is a front cross-sectional view solution view of a main part of a water image display means of the underwater observation means shown in FIG. It is a bottom view solution figure of the principal part of the surface image display means of the underwater observation means shown in FIG. FIG. 2 is an illustration of a front view of a main part of a surface image display means of the underwater observation means shown in FIG. 1. It is a perspective view solution figure of the principal part of the surface image display means of the underwater observation means shown in FIG. It is a perspective view solution figure of the principal part of the surface image display means of the underwater observation means shown in FIG. It is a perspective view of the principal part of the surface image display means of the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the surface image display means in the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the surface image display means in the underwater observation means shown in FIG. It is a figure which shows the transmission means winding body of the underwater observation means shown in FIG. 1, (A) is a bottom view solution figure, (B) is a cross-section solution figure. It is a figure which shows the rotary body instruction | indication means of the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the surface image display means in the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the surface image display means in the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the surface image display means in the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the surface image display means in the underwater observation means shown in FIG. It is a principal part expanded sectional view solution figure which shows the underwater imaging means in the underwater observation means shown in FIG. It is a disassembled perspective view solution figure of the underwater imaging means in the underwater observation means shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Underwater observation means 12 Underwater imaging means 14 Water image display means 16 Transmission means 18 Elongate holding means 22 Camera main body 24 Illumination part 26 Underwater imaging body body 28 Attitude control body 30 Cover body 30a, 32c Screw part 30b Collar part 32 Cover Front body 32a Pressing portion 32b Translucent portion 33 Transparent plate 34 Transmission means fixing portion 36 Screwed convex portion 38 Cord blind plug 40a, 40b O-ring 42 Weight fixing sleeve 44a, 44b Weight 46 Ladder mounting portion 50 Ladder 52a Front side ladder piece 52b Back side ladder piece 52c Ladder connecting part 52d, 52e Cover part 54 Groove 70 Display 72 Display operation control part 72a Convex part 74 Power supply part 76 Winding means 78 Mounting means 80 Rotating body 80a Insertion hole 80b Transmission means winding part 80c Seat Part 80d hole 80e protrusion 82 Display means body 84 Transmission means winding body 84a Transmission means insertion hole 84b Stepped portion 84c Recess 85 Packing 86 Display holder 86a Battery loading portion 86b Knob attachment portion 88 Rotation knob 88a Shaft 90 Operation portion 92 Hood 92a Opening portion 94 Power supply lid 95 Packing 100 Rotating body support means 100a, 100b Projection strip 102 Mounting bracket 110 Guide rod 110a Gripping portion 110b Concavity 112 Transmission means guide 130, 132, 134 Fixing tool

Claims (5)

An underwater imaging means for imaging by being submerged in water;
A video display means for receiving and displaying a video signal from the underwater imaging means;
Cable-shaped transmission means for transmitting a video signal from the underwater imaging means to a water image display means;
An elongate holding means for holding the water image display means on the front side, and extending the transmission means from the water image display means and hanging the underwater image pickup means from the vicinity of the tip thereof,
Underwater imaging means
The camera body,
An underwater imaging body that houses the camera body;
An attitude control body that sinks in water and controls the attitude;
The water image display means includes
A display for displaying a video signal transmitted from the camera body of the underwater imaging means;
A display operation unit for operating the display;
A power supply for supplying power to the display;
Winding means for winding the transmission means;
The display unit, the display operation unit, the power supply unit, and the winding unit, the mounting unit for integrally mounting to the elongated holding unit,
The elongate holding means is an underwater observation means having transmission means movement assisting means for moving the transmission means toward the hand side and toward the distal end side. Water video display means
A winding means having a rotating body formed to wind the transmission means;
Rotator support means for fixing the rotator to the elongated holding means rotatably,
2. The underwater observation according to claim 1, further comprising: a display unit main body fixed to the display unit and the display operation unit and connected to the rotating body support unit so as to face the rotating body of the winding unit. means. The rotating body support means is a cylinder or a columnar shape, and a mounting bracket is fixed at one end thereof, and is formed so as to support the display means body of the water image display means at the other end.
The underwater observation means according to claim 2, wherein the mounting bracket is formed so as to be fixed to the elongated holding means. The rotating body that constitutes the winding means of the surface image display means is a hemispherical dish type with the center bulging,
The display means main body of the surface image display means has an outer shape in which the area facing the rotating body is substantially the same
The underwater observation means according to claim 2 or 3, wherein the transmission means is formed so as to be wound between surfaces whose center swells. Water video display means
A display means main body for fixing the display and the display operation section includes a transmission means winding body, and a display body holding body fixed to the transmission means winding body and fixing the display and the display operation section.
The transmission means winding body is formed to be fixed along the outer peripheral edge of the display holder, and the transmission means winding body and / or the display holder is configured to rotate the transmission means winding body. The underwater observation means according to any one of claims 1 to 4, wherein a rotary knob is formed.

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