JPS61188526A - Camera for photographing inside of tube - Google Patents

Abstract

PURPOSE:To make a control signal simple, to make a control mechanism easy, to make a camera main body compact and to execute the photographing of the inside of a small diameter tube by interlocking to the rotating body which stops at the prescribed position and operating a film winding up mechanism, etc. CONSTITUTION:A rotating body 58 is rotated by a starting of a motor 51 in the clock-wise direction, the pin 59 turns a shutter releasing lever 74 and a lever 93 through a lever 70 in the clock-wise direction, the tip of an arm 100 energizes and releases a shutter 101 in the counter-clockwise direction, the bending part 105 pushes a contact 106 and the stroboscope light-emitting is executed. A gear 83 of a film winding-up mechanism is rotated for 120 deg. each through a gear 75 by one rotation of the rotating body 58. Since the above- mentioned operation may be executed by the easy on/off signal only, the control mechanism is made very simple, the camera main body is made compact, the inside of the small diameter tube can be photographed by the side viewing, a camera is remotely controlled, and the mechanism can be made simple.

Description

[Detailed Description of the Invention] (Field of Industrial Application) □The present invention relates to a camera for photographing inside a pipe, and in particular, a camera for photographing inside a pipe that is capable of photographing the inside even if the pipe body has a relatively small diameter. Regarding the camera.

(Prior Art) There is an in-pipe photographing camera that can take pictures of the inside of a pipe through which telephone cables, etc. pass, water supply and sewage pipes, etc.

Conventional intra-tube photography cameras are such that a TV camera is inserted into the pipe and the situation inside the pipe is observed in real time while watching an external monitor.Also, a TV camera and still camera are combined and connected to the TV camera. While watching the monitor, you can take pictures with the still camera as needed.

(Problems to be Solved by the Invention) Since the conventional camera for taking pictures inside the tube uses a television camera, the images obtained are unclear. On this point, a combination of a television camera and a still camera can provide clear still images, but this camera is only for direct viewing and cannot photograph the inner wall of the tube through side viewing. , it is only possible to image the inside of a large-diameter tube. In addition, with the conventional tube camera that uses a television camera, when trying to photograph the inner wall of the tube by looking at the side, the camera body becomes large, and it is only possible to photograph the inside of a tube with a large diameter. Attempting to remotely control a television camera requires a large-scale control device and a monitor cable, which means that the cable connected to the television camera also becomes large-scale.

The purpose of the present invention is to make it possible to obtain clear images, to be able to photograph the inside of even small-diameter tubes from the side view, and to remotely control the camera using extremely simple control signals. The purpose of the present invention is to provide a camera for photographing inside a tube that can be operated and has a simple mechanism.

(Means for Solving the Problems) The camera for photographing inside a pipe according to the present invention includes a camera body that can be inserted into a pipe as an object, and a camera body that can be operated remotely via a connecting cable. and an operation switch, and the camera body includes: (a) a motor that is started by operating the operation switch; and (b) a motor that is driven by the motor and is stopped when the motor is stopped at a predetermined rotational position. c, a shutter released by the rotary body from when the rotary body is started until it stops at a predetermined rotational position; and d.
. a synchronizing contact that operates in synchronization with the opening of the shutter, e, a strobe light emitter that emits light in synchronization with the operation of the synchronizing contact to illuminate the field of view of the photographic lens, and f, the rotating body activated. As if winding the film between the time when the film is
The present invention is characterized in that it has a film winding +y mechanism that is driven via the rotating body, and a shutter charging mechanism that charges the shutter by driving the film winding mechanisms g and l.

, 1 action) When the operating switch is remotely operated, the motor on the camera body side is activated to start the rotating body, and this rotating body stops at a predetermined rotational position. Between the start and stop of the rotating body, the shutter is released and the strobe light emitter flashes for one period, and the film winding mechanism is driven via the rotating body to wind the film. The shutter charging mechanism is driven by the driving of the mechanism, and the shutter is charged. The remote control signal is a very simple signal that only starts the motor. (Example) In Figure 1, reference numeral 1 indicates the camera body, and 2 indicates the control box. A power battery is loaded, and an attachment 3 for side viewing is attached to the tip of the camera body 1. The optical axis of the camera is along the central axis of the camera body 1, and when the attachment 3 is removed, it is possible to take pictures in a field of view centered on the central axis of the camera body 1. The camera body 1 including the attachment 3 has a cylindrical outer shape and can be inserted into a tube to be photographed.

The control box 2 is provided with a main switch 4, an operation push button switch 5, a photographing preparation display lamp 6, and a film counter 7. Further, the control box 2 is loaded with a power supply battery for control. The camera body 1 and the control box 2 are connected by a cable 8, and the camera in the camera body 1 can be operated via the cable 8 by operating the operation switch 5. Cable 8 is quite long,
It is designed to be wound around a cable drum.

In FIGS. 2 to 4, a camera having a photographic lens 9 is provided at the tip of the cylindrical camera body 1 so that the optical axis of the photographic lens 9 is aligned with the central axis of the camera body 1. installed.

The camera is mounted in the cylindrical space formed by the camera body 1, and a control power supply battery and a strobe power supply battery are also loaded, but the power supply battery section is not shown. A light emitting section 10 of a strobe light emitter is provided on the side of the photographing lens 9. A ring 11 is fixed to the outer periphery of the tip of the camera body 1. A helicoid 12 is formed on the outer periphery of the tip of the ring 11, and this helicoid 1
2, a side viewing attachment 3 or a direct viewing protection member 13 as shown in FIG. 3 is attached.

In FIG. 2, the side viewing attachment 3 has a cylindrical body 14 at its base end, another cylindrical body 15 press-fitted into the cylindrical body 14, and a rotating ring 16. The attachment 3 is attached to the camera body 1 by rotating the rotating ring 16 while being fitted onto the inner peripheral surface of the side ring 11 and screwing it into the helicoid 12. The cylindrical body 14 is provided with a ring 17 for waterproofing between the ring 11 and the cylindrical body 14. An appropriate number of supports 18 are screwed into the cylinder 15 and erected in the direction of the central axis of the attachment 3. The motor mounting body 19 is supported at the tip of each support column 18 by inserting a hole in the motor mounting body 19 and screwing a nut 20 thereto. A transparent cylinder 21 made of plastic, glass, or the like is interposed between the cylindrical body 15 and the motor mounting body 19 so as to surround each of the pillars 18 .

The transparent cylinder 21 is fitted into circumferential grooves formed on the outer peripheral edges of opposing surfaces of the cylindrical body 15 and the motor mounting body 19 via waterproof rings 22 and 23, respectively.

The motor is mounted on the inner periphery of the tip of the body 19 with a helicoid 2.
4 is formed, and a cap 25 is screwed onto this helicoid 24. A ring 26 is fitted on the inner circumference of the motor mounting body 19 to ensure waterproofing between the body 19 and the protective cap 25 .

Regarding the motor attachment, a guard motor 27 is attached to the body 19. A boss 29 is fitted and fixed to the output shaft 28 of the motor 27. The boss 29 extends along the central axis of the attachment 3, and the motor mounting extends through the body 19. A mirror 30 is integrally fixed to the boss 29. The mirror 30 is installed obliquely at a predetermined angle with respect to the central axis of the attachment 3, and by bending the optical axis of the photographic lens 9 to the side, the mirror 30 deflects light from the subject 31, such as the inner circumferential wall of the tube, which enters through the transparent cylinder 21. Guide the light to the photographic lens 9 (
At the same time, the light from the light emitting unit 10 is reflected and irradiated onto the subject 31 through the transparent cylinder 21. The mirror 30 has a circular shape when viewed from the direction of the central axis of the attachment 3, and rotates as the motor 27 drives it, so that the photographic lens 9
The field of view can be rotated.

The mirror 30 is configured to be rotated at predetermined rotation angles by a rotation control mechanism as described below. In FIGS. 2, 5, and 6, a cam plate 32 is attached integrally with the mirror 30, and the cam plate 32 has protrusions 33 at 60 degree intervals on its outer periphery. For mounting the motor, a rotating shaft 34 is attached to the body 19 passing through it. A lever 35 is integrally fixed to one end of the rotating shaft 34, and a lever 36 is integrally fixed to the other end. A pin 37 is formed on the tip of the lever 36. Practically one Leno<-'
35 and 36 are biased to rotate counterclockwise in FIG. 5 by appropriate springs, and the pin 37 is in contact with the outer peripheral surface of the cam plate 32. A micro switch 3 is installed on the side of the motor 27.
8 is installed. The bent tip of the lever 35 is close to the actuator 39 of the microswitch 38. The cam plate 32 is rotated clockwise in FIG. 5, and the protrusion 33. )-ra, repeat 737 is pressed,-
When 35 and 36 are rotated against the force, lever 3
5 pushes the actuator 39, the microswitch 38 is actuated, and the motor 27 is stopped. Since the cam plate 32 has protrusions 33 at intervals of 60 degrees, the cam body 32 is activated by the activation of two sides of the motor 27.
is rotated by 60 degrees, so that the mirror 30 is also rotated by 60 degrees.

The power supply to the motor 27 and the transmission of control signals are shown in FIG.
The connection is made between the camera body 1 and the attachment 3 via a connection terminal as shown in FIG. 7 and 8, an insulating terminal board 40 is attached to the tip of the camera body 1, and a total of four jacks 41 are embedded in this terminal board 40. As shown in FIGS.

On the other hand, an insulating terminal board 42 is attached to the cylindrical body 15 forming the base of the attachment 3, and a total of four pins 43 are attached to this terminal board 42 passing through the terminal board 42. These pins 43 fit into the jack 41 as shown in FIG. 8 when the attachment 3 is attached to the camera body 1, and these pins 43 and
Power is supplied to the motor 27 from the camera body 1 side through the motor 27, and control signals are transmitted thereto.

Note that a cord for transmitting power and control signals between the pin 43 and the motor 27 is passed through the tubular support 18.

A converter lens 44 for close-up photography is attached to the terminal board 40 of one example of the camera body, and the subject 3 at a close position is attached to the terminal board 40.
It is now possible to photograph the inner circumferential surface of the tubular body as shown in FIG.

When attempting to directly view and photograph a tube as a subject in the direction of its central axis, the direct viewing protection member 13 is used as described above. In FIG. 3, the protection member 13 mainly consists of a cylindrical body 45 that fits into the inner peripheral surface of the ring 11 on the camera main body 1 side. The cylindrical body 45 is attached to the camera body 1 by screwing the ring 46 into the helicoid 12 of the ring 11 while being fitted into the ring 11. A ring 47 is also fitted into the cylindrical body 45 to ensure waterproofing between the cylinder body 45 and the ring 11. A cap 49 holding a transparent plate 48 made of plastic or glass is fitted and fixed to the front end of the cylindrical body 45 to protect a camera, a strobe light emitter, etc. Note that in the case of direct viewing, the converter lens 44 (see FIG. 2) is removed.

Next, the camera attached to the camera body 1 will be explained. The camera is assembled using the substrate 50 shown in FIGS. 3 and 9.

A motor 51 is attached to the bottom side of the board 50.
A pinion 52 is fitted and fixed to the output shaft of the motor 51 that protrudes toward the upper surface of the motor.

In FIG. 9, the rotational force of the pinion 52 is transmitted to the gear 57 via a reduction gear train 53, 54, 55, 56. The gear 57 is provided integrally with the partial gear 58. Hereinafter, the partial gear 58 will be referred to as a rotating body.A zero-rotating body 58 has a pin 59 fixed at an eccentric position. A tip 61 of a sickle-shaped lever 60 extends onto the path of the pin 59. The lever 60 is urged to rotate counterclockwise by a device (not shown), but as the motor 51 rotates, the rotating body 58 is rotated clockwise in the figure, so that the pin 59 moves toward the tip 61 of the lever 60. When it hits, the lever 60 is rotated clockwise. The lever 60 has another arm 62, and when the lever 60 is rotated clockwise, the arm 62 pushes the bent portion 64 of the lever 63, causing the lever 63 to rotate in the hour hand direction.
A bent end portion 65 of the lever 63 pushes an actuator 67 of a microswitch 66 to operate the microswitch 66. The micro switch 66 is for stopping the motor 51 as will be explained later, and when the motor 51 is started and the rotating body 58 rotates once, the motor 5 is stopped.
1 is stopped. When the motor 51 is started and the rotating body 58 rotates slightly clockwise, the pin 59 reaches the filamentous recess 68 of the lever 60, and the lever 60 is pushed back by the biasing force, as shown in FIG. The microswitch 66 is reset by rotating it clockwise.

The tip 71 of the lever 70 also extends into the passage of the pin 59 of the rotary body 58, and when the rotary body 58 starts to rotate by starting the motor 51, the lever 70 is first moved by the pin 59.
The tip end 71 of the lever 70 is pushed, and the lever 70 is rotated counterclockwise against the biasing force of the spring 72.

The rotational force of the lever 70 is transmitted to the intermediate member 73 and converted into a linear motion, and the linear motion of the intermediate member 73 is transmitted to the shirt release lever 74 and converted into a rotational motion.
The release lever 74 is rotated clockwise. The release lever 74 is urged to rotate counterclockwise by a spring (not shown).

A gear 75 is located on the side of the rotating body 58. gear 7
5 is supported by a lever 76. The lever 76 is urged to rotate clockwise by a spring 78, and when the gear 75 is close to the rotating body 58, the gear portion of the zero rotating body 58 is prevented from rotating due to the biasing force by a stopper 79. After the lever 70 is rotated by the lever 59, the lever 70 engages with the gear 75, and is disengaged from the gear 75 when the rotating body 58 rotates approximately one revolution. The rotational force of the gear 75 is transmitted to the gear 8 via a reduction gear train 81,82.
3. The gear 83 is the film winding shaft 8. It is integrally attached to j. gear 83
There are three pins 85 fixed at 120 degree intervals on □
The gear train is set so that the gear 83 rotates 120 degrees each time the rotating body 58 rotates once. In this embodiment, a well-known film of 8 mm size stored in a cartridge is used. The film winding shaft 84 may have a well-known structure. In FIG. 2, the symbol F indicates the film surface.

In FIG. 10, the front end of the substrate 50 (
A shutter charge lever 87 is provided so as to be slidable along the front edge of the substrate 50 so as to extend along the left edge in FIG. 10 and overlap the release lever 74. The charge lever 87 is biased by a spring 88 so as to slide upward in the figure.

The charge lever 87 has a side protrusion 89 . The side protrusion 89 advances onto the path of each pin 85 of the gear 83, and each time the gear 83 rotates by 120 degrees, it is pushed by one of the pins 85 and moves the charge lever 87 downward in the figure against the biasing force. At the end of the 120 degree rotation of the gear 83, the side protrusion 89 and the pin 85 come out of contact and the charge lever 87 returns to its original position by the biasing force of the spring 88. The charge lever 87 has another side protrusion 90 on the side opposite to the side protrusion 89 .

In FIGS. 10 and 11, the front plate 9 integrated with the board 50
A three-armed shutter operating lever 93 is rotatably attached to 2. Both ends of a spring 96 are applied to the second arm 94 and pin 95 of the lever 93, so that the lever 93 is urged to rotate counterclockwise in FIG. 11, and the third arm 94 abuts the pin 95. This prevents rotation due to the biasing force. Lever 9
The second arm 97 of No. 3 is connected to the side protrusion 9 of the charge lever 87.
Advance to the movement path of 0 and press the charge lever 87 or spring 88.
When the second arm 97 moves against the lateral protrusion 90 of the charge lever 87, the lever 93 is rotated clockwise against the spring 96. Lever 9
3 is rotated clockwise, its second arm 97 hits the inclined surface 98 formed on the side of the distal end of the release lever 74, causing the release lever 74 to resist the biasing force and move the release lever 74 toward the first
Push it in the direction of the hour hand in the θ diagram, and also turn the second arm 9.
7 passes through the inclined surface 98, the release lever 74 returns to its original position, and the hook portion 99 formed following the inclined surface 98 advances into the passage of the second arm 97 of the lever 93, and the release lever 74 returns to its original position. It is designed to prevent J-93 from returning to rotation.

When the lever 93 is rotated against the spring 96, the third arm 100 of the lever 93 passes through a bent portion 102 formed at the tip of the shutter 101. The shutter 101 is biased to rotate counterclockwise in FIG. 11 by an appropriate spring, and usually by an appropriate stopper.
The front side of the photographic lens 9 and converter lens 44 is shielded.

The bent portion 102 of the shutter 101 is an inclined surface, and when the lever 93 rotates clockwise against the spring 96, its third arm 100 slides into contact with the inclined surface of the bent portion 102. To overcome this, when the lever 93 returns to its original position due to force, the third arm 100 hooks the bent portion 102 and rotates the shutter 101 clockwise against the biasing force.
The front of the photographing lens 9 and the comparator lens 44 is opened. When the lever 93 returns to rotation to a certain extent, the contact between the third arm 100 and the first bent portion 102 of the shutter 101 is removed, and the shutter 101 returns to rotation, so that the front of the photographing lens 9 and the converter lens 44 is shielded again. It has become.

When the shutter 101 opens the front of the photographic lens 9,
The bent portion 105 pushes the synchronizing contact 106 to turn on the contact 106, causing the above-mentioned strobe light emitter to emit light.

Next, an example of an electric circuit that can be used for the mechanical components described above will be explained.

In FIG. 12, reference numeral 1 indicates the camera body, 2 indicates a control box, and 3 indicates a side viewing attachment. Control box 2 is the main switch 4 as mentioned above.
, an operation switch 5, a shooting preparation display lamp 6, and a film counter 7. When the main switch 4 is turned on, power is supplied from the power supply battery 110 to the counter operation circuit 111. An operation push button switch 5 is connected to the counter operation circuit 111, and when the switch 5 is pressed, the counter 7 is driven to increment the display indicating the number of shots, and a control signal is sent via the cable 8. The information is transmitted to the camera body 1. This control signal is a simple signal that only indicates on and off. The control box 2 also includes a photographing preparation display circuit 112 that lights up the display lamp 6 when a certain period of time has elapsed from the time when the operation switch 5 was operated. This shooting preparation display circuit 1
12 is the time required after a photograph is taken by pressing the operation switch 5 until preparations for the next photograph are completed, that is, the film is wound and the main capacitor of the strobe light emitter is required and sufficiently charged. The display lamp 6 is turned on after measuring the time required until the end. Since the cable 8 used has a considerably long overall length, it is wound around a cable drum 113.

The camera body 1 includes a power battery 11 for operating the camera.
4 and a power supply battery 115 for the strobe light emitter. The control signal transmitted via the cable 8 is applied to the camera drive circuit 116, and the camera drive circuit 116 receives this signal after a predetermined period of time (the time necessary for the mirror to rotate by a predetermined angle, which will be described later) has elapsed. Later, power is supplied from the power battery 114 to the motor 51 to drive the motor 51. As already mentioned, the motor 51 is a rotating body 58
The camera's shutter and film winding mechanism are operated by rotating the camera's shutter and film winding mechanism. The motor 51 is turned off by the aforementioned stop switch 66 (see FIG. 9).
It is designed to stop when it has completed one revolution. Furthermore, when the synchro contact 106 is turned on in synchronization with the opening of the shutter, the strobe path 120 is triggered and the light emitting section 10 emits light.

The power supply circuit of the strobe circuit 120 is provided with 12 manually operated switches. The switch 121 is for the purpose of preventing the battery 115 from being wasted by turning it on only when the mirror is being used.

The side viewing attachment 3 has a mirror operating circuit 123, and the control signal is transmitted to the mirror operating circuit 123 from the camera body 1 side via the pin jack described with reference to FIGS. 7 and 8, Further, power is supplied from a battery 114. Mirror operation circuit 12
3 drives the motor 27 to rotate the mirror 30 in response to the input of the control signal, and stops the motor 27 when the mirror 30 rotates by a predetermined angle and a stop switch 38 is activated.

Next, the operation of the above embodiment will be explained.

Assume now that the side viewing attachment 3 is attached to the camera body 1 as shown in FIG. 1, and is inserted into the tube in which a photograph is to be taken. Conte.

When the operation switch 5 is pressed while placed on the roll box 2 side, the counter operation circuit 111 shown in FIG. introduce.

This control signal is the mirror operating circuit 1 on the attachment 3 side.
23, and first the motor 27 is started.

As shown in FIGS. 2, 5, and 6-, the mirror 30 and the cam plate 32 integrated therewith rotate as the motor 27 starts, and when the mirror 30 rotates 60 degrees, the cam plate 3
One of the protrusions 33 of the second bar pushes the pin 37 of the first bar 36, and the lever 36 and the lever 35 integrated therewith resist the urging force.

and rotate it. By turning this lever 35, my...

The actuator 39 of the cross switch 38 is pressed to turn off the micro switch 38, thereby stopping the motor 27. By rotating and stopping the mirror 30 in this manner, the viewing range of the photographing lens 9 of the camera and the irradiation range of the flash unit 10 of the strobe are changed and set.

After the control signal is input, the camera drive circuit 116 of the camera body 1 starts the motor 51 with a delay of the time necessary for the mirror 30 to rotate 60 degrees. As shown in FIG. 9, when the motor 51 is started, the rotating body 58 is rotated clockwise.

This rotation of the rotating body 58 causes the pin 59 of the rotating body 58 to
First, push the tip 71 of the lever 70 to rotate the lever 7G counterclockwise. The rotational force of this lever 70 is transmitted to the relay lever 74 via the intermediary lever 73 and rotates the lever 74 clockwise, causing the hook portion 99 to escape from the passage of the second arm 97 of the shutter drive lever 93.
Since the lever 93 has been rotated clockwise in FIG. 11 against the biasing force due to the previously performed shutter charging, the hook portion 9 of the release lever 74 is rotated as described above.
When the lever 9 escapes from the passage of the second arm 97 of the lever 93, the lever 93 is rotated back to its original position by the biasing force. During this return to rotation, the third arm 100 hooks the bent portion 102 of the shutter 101 and rotates the shutter 101 clockwise against the urging force to open the shutter 101. When the shutter 101 is opened, the synchro contact 106 is turned on,
The light emitting unit 1 is controlled by the strobe circuit 120 in FIG.
0 is made to emit light. The illumination light emitted from the light emitting unit 10 is reflected laterally by the mirror 30 shown in FIG.
The light is irradiated through the transparent cylinder 21 onto the inner wall of the tube as the subject 31. The reflected light from the subject 31 passes through the transparent cylinder 21, is reflected by the mirror 30, and is guided to the photographing lens 9 through the open shutter section, where the image of the subject 31 is formed on the film and photographed. .

At the final stage of the rotation return of the shutter drive lever 93, the third arm 100 and the bent portion 102 of the shutter 101 come out of contact, and the shutter 101 returns to rotation due to the biasing force, thereby closing the shutter.

In FIG. 9, the rotating body 58 continues to rotate, and when the photographing is completed as described above, the partial gears of the rotating body 58 mesh with the teeth *75, and the gears 83 are connected via the gear train 81, 82. Drive rotation. The gear 83 is integrated with a film winding shaft 84, and the film is wound up by rotation of the winding shaft 84. As the gear 83 rotates, one of its pins 85 pushes the protrusion 89 of the shutter charge lever 87 in FIG.
7 is moved downward in the figure against the urging force. As the shutter charge lever 87 moves, its protrusion 9
0 drives the shank and pushes the second arm 97 of the bar 93 to rotate the lever 93 counterclockwise in FIG. 11 against the biasing force. During the rotation of lever 93, its second arm 9
7 hits the inclined surface 98 at the tip of the first release lever 74 and pushes the inclined surface 98, causing the release lever 74 to rotate against the biasing force, but in the final stage of rotation of the lever 93, the second The arm 97 passes over the inclined surface 98 of the release lever 74, and the release lever 74 is rotated by the biasing force so that its hook portion 99 advances into the return path of the second arm 97 of the lever 93.
Preventing lever 93 from returning. Also, in the final stage of the rotation of the lever 93 against the biasing force, the third arm 100
passes over the inclined surface of the bent end portion 102 of the shutter 101. When the shutter drive lever 93 is biased in this way,
One of the pins 85 of the gear 83 and the protrusion 89 of the charge lever 87 come out of contact, and the charge lever 87 returns to the M position.

In FIG. 9, when the rotating body 58 rotates once, the pin 5
9 presses -i@61 of the lever 60 to rotate the lever 60 clockwise. By rotating the lever 60, the lever 6
Micro anti-inch 66 actuator 67 through 3
is pressed, the microsink intro 6 is turned off, and the 1st
The camera drive circuit 116 in FIG. 2 stops the motor 51. In this way, while the rotating body 5 rock □ is rotated once, the rotation angle of the gear 83 driven by the partial gear through the gear train 75, 81, 82 is 120 degrees □, and as a result, the film is wound by one frame. The shutter is also charged and preparations are made for the next shooting.

Shooting preparation display circuit 1 on the control box 2 side
At step 12, after the operation switch 5 is pressed, preparations for shooting are made by lighting up the display lamps 6 necessary and sufficient for winding the upper film, charging the shutter, and completing the charging of the main capacitor in the strobe light circuit 120. Show completed. After confirming that the display lamp 6 is lit, if the operation switch 5 is pressed again, the rotation of the mirror, opening/closing of the shutter, winding of the film, and charging of the shutter are performed in the order described above.

The above is a case where the attachment 3 is attached and the inner wall of the tube body is viewed from the side and photographed, but if the attachment 3 is removed, the inner wall of the tube body can also be photographed by looking directly in the direction of its central axis. In the case of direct viewing, a direct viewing protection member 13 is attached to the camera body 1 in place of the attachment 3 as shown in FIG. Since it is parallel to the central axis of the tube to be photographed, the inner wall of the tube can be photographed while directly viewing it. Further, in the case of direct view photography, there is no rotation process of the mirror 30, and other operations are performed in the same order and at the same timing as in the case of side view.

(Effects of the Invention) According to the present invention, a motor activated by a remotely operated switch is provided on the camera body side, and a rotating body that is rotationally driven by the motor by a certain amount of rotation is provided on the camera body side, While this rotating body rotates a certain amount of rotation, a series of operations such as film winding, shutter charging, and shutter release are performed, so there is a connection between the camera body and the control box that remotely controls it. A simple control signal such as on or off is sufficient for the control signal, and since only one type of signal is required, the configuration of the control circuit and control mechanism is extremely simplified, and the control signal between the camera body and the control box is extremely simple. An extremely simple cable is sufficient to connect the camera.Furthermore, the camera is a still camera, and since all operations are performed by the motor by simply sending a motor start signal, the camera body can be extremely compact. Therefore, it is possible to photograph even a small-diameter tube body, for example, 8 cm in inner diameter, which could not be photographed with a conventional camera for photographing inside the tube.

[Brief explanation of drawings]

Fig. 1 is an external view showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of the camera body and side viewing attachment part of the above embodiment, and Fig. 3 is a direct view mode of the above 8th embodiment. FIG. 4 is a left side view of the camera body, FIG. ! ? , Figure 1 is a cross-sectional view taken along the line ■°2■ in Figure 2, No. 8- is a vertical cross-sectional view showing the main part of the same cross-section, and No. 9! 10 is a plan view of the shutter charging mechanism portion of the above camera, FIG. 11 is a front view of the shutter section of the above camera, and FIG. 12 is a plan view of the camera used in the above embodiment. FIG. 2 is a block diagram showing an example of an electric circuit used in the present invention. . 1--Camera body, 5--Operation switch,
8--Connection cable, 51--Motor, 58-
- Rotating body, 84... Winding shaft included in the film winding mechanism, 87... Charge lever included in the shutter charging mechanism, 101... Shutter,
106 song synchronization contacts. ■4th eye

Claims (1)

[Claims] The camera body comprises a camera body made to be inserted into a tube as an object, and an operation switch for remotely operating the camera body via a connecting cable. a. a motor that is started by operating the operation switch; b. a rotating body that is driven by the motor and is stopped when the motor is stopped at a predetermined rotational position; c. the rotating body is activated. a shutter that is released by a rotating body from when the shutter is released until it stops at a predetermined rotational position; d. a synchronizing contact that operates in synchronization with the opening of the shutter; e. a strobe light emitter that emits light in synchronization to illuminate the field of view of the photographic lens; A camera for in-tub photography, comprising: a film winding mechanism that is driven by the film winding mechanism; g. a shutter charging mechanism that charges a shutter by driving the film winding mechanism.