JPH0514272Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a waterproof camera.

[Conventional technology]

Conventionally, the front cover has a cylindrical body for guiding the lens barrel with a transparent window glass attached watertightly, and a cylindrical body for protecting the lens barrel. There is a waterproof camera in which the camera body is housed inside an outer shell.

[Problem that the invention attempts to solve]

By the way, in conventional waterproof cameras of this type, in order to increase the magnification of focal length switching, it is necessary to increase the range of movement of the photographic lens, and the wider the range of movement of the photographic lens, the better the light shielding. As the light-shielding range to be shielded becomes wider, the degree of protrusion when the photographic lens is extended increases, and the front surface of the outer shell that covers the extended photographic lens inevitably becomes even more protruding. An increase in the degree of protrusion poses a problem in that the waterproof camera becomes larger.

The present invention was made in view of the above-mentioned actual situation, and although the magnification of focal length switching is increased,
The purpose of this invention is to provide a waterproof camera that can suppress the increase in size.

[Means for Solving the Problems] In order to solve the above-mentioned object, the present invention provides a lens barrel guiding tube that protrudes concentrically from the front end of the light-shielding tube through a step for expanding the diameter. A front light shielding ring having a plurality of spring receiving claws on the rear end surface is fitted in a front light shielding plate having a snake's eye shape fixed to the front end surface of the lens barrel guiding cylindrical body of the camera body so as to be able to move forward and backward. An outer ring is provided at the rear end with a locking flange that engages with the rear end surface of the front light-shielding ring and a cut groove into which the spring receiving claw is loosely fitted, and an inner ring that holds the lens barrel in the center. A lens barrel holding ring is formed integrally with the rear surface of a disc having a light guiding port at intervals, and a spring received by the spring receiving claw is interposed between the outer ring and the inner ring, A snake-shaped rear light shielding plate is fitted into the front light shielding ring so that it can move forward and backward, and at the rear end of the lens barrel. The camera body part has a light shielding member for focus switching that is integrally formed with a light shielding ring after being fitted so that it can move forward and backward. A waterproof camera characterized in that a back cover is housed in an outer shell which is hinged to the rear part of the front cover in which a cylindrical part for protection of a cylindrical body for guiding a trunk is formed so as to be able to be closed in a watertight manner. be.

[Effect]

The waterproof camera according to the present invention has the above-described configuration, and when switching from a normal shooting state in which the front light shielding ring, lens barrel holding ring, and lens barrel are retracted to a telephoto shooting state, Initially, the lens barrel holding ring and the lens barrel are moved forward together, but at this time, the spring interposed between the outer ring and the inner ring that constitute the lens barrel holding ring is stretched.
Although the front light shielding ring is prevented from moving forward together with the lens barrel holding ring and the lens barrel due to the bias of this spring, the locking flange of the lens barrel holding ring engages with the rear end surface of the front light shielding ring. When the front light-shielding ring is moved forward together with the lens barrel holding ring and the lens barrel, the telephoto shooting state is established.

As described above, the front light-shielding ring in the telephoto shooting state when the lens barrel is moved forward is different from the front light shielding ring in the normal shooting state with respect to the lens barrel holding ring compared to the normal shooting state when the lens barrel is moved back. At this time, the front end opening with the light-transmitting window glass of the outer body is retracted by the distance between the rear end surface of the front light shielding ring and the locking collar of the lens barrel holding ring. It becomes possible to move the edge back.

Also, when the lens barrel is moved forward, the rear light shielding ring that constitutes the focus switching light shielding member fixed to the lens barrel is pulled out from the light shielding tube, so that the area to be shielded is expanded. Light shielding is possible.

Furthermore, when the lens barrel is moved forward or backward, the rear light-shielding plate, which constitutes the focus switching light-shielding member fixed to the lens barrel, is moved forward or backward while being fitted into the barrel-guiding cylindrical body. Smoothly guided by the trunk guiding cylindrical body.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to drawings illustrating embodiments of a waterproof camera according to the present invention.

In the figure, X is a waterproof camera, and this waterproof camera X has a camera body part Y and a camera body part Y.
The main component is an outer shell Z that houses and holds the watertight container.

The camera main body Y includes a camera body 10, a front light shielding plate 20, a front light shielding ring 30, a lens barrel holding ring 40, a lens barrel 50 to which a photographic lens 100 is attached, a focus switching light shielding member 60, and a shutter member. 70, an auxiliary lens 101, a focus switching mechanism, a shutter operation mechanism, an auxiliary lens advancing/retracting operation mechanism, a driving motor, etc., which are not shown or explained. It is composed of a back cover 90.

By the way, the above-mentioned camera body 10 is approximately the same as the previous one, and the lens barrel guiding cylindrical body 12 is attached to the front side via the diameter expanding step part 11 surrounding the optical path forming part, and the lens barrel guiding cylindrical body 12 is attached to the rear side via the diameter expanding step part 11. On the side is the lens barrel guiding cylindrical body 1.
A light-shielding tube 13 concentric with 2 and having a smaller diameter than the light-shielding tube 13 has a spool chamber 14 opened to the rear on one side of the light-shielding tube 13, and a cartridge chamber 14 opened to the rear on the other side. 15, and a battery chamber 16 on the outside of the cartridge chamber 15. Inside the spool chamber 14 is a spool 1 which is rotated by a drive mechanism (not shown).
7 is installed.

The front light shielding plate 20 also has a through hole 21 in the center.
The front light-shielding plate 20 is formed by applying anti-reflection treatment to a snake-like disc with a zigzag shape, and the front light-shielding plate 20 is arranged so that it is concentric with the front end surface of the lens barrel guiding cylindrical body 12 of the camera body 10. As shown in FIGS. 3 and 4, the front light shielding ring 30 has a front end of a ring main body that is fitted into the through hole 21 of the front light shielding plate 20 so as to be able to move forward and backward. A collar 31 that engages with the front surface of the front light shielding plate 20 is provided on the rear end surface 32.
Several spring receiving claws 34, which lock the rear end of a spring 33 interposed between an outer ring 42 and an inner ring 43 constituting a lens barrel holding ring 40, which will be described later, are arranged at approximately equal intervals. It is made by being pushed inward.

Further, the lens barrel holding ring 40 is fitted into the front end opening 35 of the front light shielding ring 30, and the outer edge of the rear surface of the disc 41 has a funnel-shaped light guiding port 44 in the center. , an outer ring 42 having the same outer diameter as the disk 41, and a disk 4
An inner ring 43 that fits into the inner end surface of the spring receiving claws 34, . A locking collar 45 is provided on the rear edge of the outer ring 42 to protrude outward, and a cut groove 46 is provided on the rear end of the outer ring 42 into which the spring receiving claws 34 of the front light shielding ring 30 are loosely fitted. ,
... is provided, and the inner ring 43
The lens barrel 50 is held inside.

Further, the focus switching light shielding member 60 includes a snake's eye-shaped rear light shielding plate 61 that is retractably fitted into the lens barrel guiding cylindrical body 12 of the camera body 10.
An annular protrusion 62 that is fixed to the rear end surface of the lens barrel 50 is integrally formed on the front surface of the lens barrel 50, and a rear light shielding ring 63 that fits into the light shielding tube 13 of the camera body 10 so that it can move forward and backward is integrally formed on the rear surface of the lens barrel 50. The shutter member 70 is attached to the rear light shielding plate 61.
is arranged.

The lens barrel 50 to which the photographing lens 100 is attached, the lens barrel holding ring 40, and the focus switching light shielding member 60 move forward and backward as one, and the range of movement is the same as the rear light shielding plate 61 and the front light shielding plate 20. Step part 11 for diameter expansion
It is regulated by the following.

Reference numeral 101 denotes an auxiliary lens that cooperates with the photographic lens 100 during telephoto shooting, and this auxiliary lens 10
1 is moved out of the optical path of the photographing lens 100 during normal photography, and is moved out of the optical path of the photographic lens 100 during telephoto photography by an auxiliary lens advance/retreat operation mechanism (not shown) that is linked to a focus switching mechanism (not shown). The auxiliary lens 101 is advanced to the rear of the photographic lens 100 so that the optical axis of the photographic lens 100 and the optical axis of the auxiliary lens 101 are aligned.

Furthermore, the front cover 80 is
On the front surface covering the front surface of the lens barrel guiding tube is a truncated conical tube-shaped lens barrel guiding tube protecting tube having a central axis that coincides with the common central axis of the light shielding tube 13 and the lens barrel guiding tube 12. A body part 81 is formed, and a transparent window glass 83 is attached to the front opening edge 82 of the body part 81, and an O-ring 84 and a screw screw 8 are attached to the deep part of the front opening edge 82.
The annular holding member 86 having a funnel-shaped light guiding port 86' is fixed at the point 5, and the waterproofing member 86 is recessed in the rear opening edge 87 of the portion covering the side surface of the camera body Y. A waterproof elastic body 89 is inserted into the groove 88.

Further, the back cover 90 has an inner wall surface 18 of the spool chamber 14 of the camera body 10 on the inner surface of the back plate.
A protrusion 91 that is engaged with the inner wall surface 19 of the cartridge chamber 15 and a protrusion 92 that is engaged with the inner wall surface 19 of the cartridge chamber 15 are provided protrudingly on a peripheral edge portion 93 that is formed to match the rear end opening edge portion 87 of the front cover 80. is a waterproof protrusion 9 that cooperates with the waterproof elastic body 89 of the front cover 80.
A pressure plate 95 is attached between the protrusions 91 and 92 to press the film against the rear opening edge 13' of the light-shielding tube 13. The outer shell Z is constructed by being hinged to be openable and closable with a hinge (not shown), and when the back cover 90 is closed, the inside of the outer shell Z is kept watertight.

In order to house the camera body Y in the outer body Z, the outer peripheral edge of the front light shielding plate 20 is fixed to the inner surface of the lens barrel guiding cylinder protecting cylinder part 81, and the front light shielding plate 20 is The funnel-shaped light guiding port 86' of the annular holding member 86 is fixed to the front surface of the camera body 1.
By fitting the side surface of 0 to the front cover 80, the camera body Y is fixed to the front cover 80, and then the back cover 90 is closed to make it watertight.

Since the waterproof camera according to the present invention is configured as described above, when the back cover 90 is opened, a film is loaded, and the back cover 90 is closed, the waterproof protrusion protruding from the peripheral edge 93 of the back cover 90 is opened. Article 94 is the front cover 80
By biting into the waterproof elastic body 89 inserted into the waterproof groove 88 recessed in the rear end opening edge 87, the inside of the outer body Z becomes watertight and photography becomes possible.

Then, when you operate the focus change switch of the focus change mechanism (not shown), the lens barrel of the waterproof camera will move to the first position.
From the normal shooting state shown in the figure to the telephoto shooting state shown in Fig. 2,
Alternatively, the switch can be made in the opposite manner, but when switching to telephoto shooting, as shown in FIG. was forced to advance to the rear of the photographic lens 1.
The optical axis of lens 00 and the optical axis of auxiliary lens 101 are made to coincide. In this way, when the lens barrel holding ring 40 and the lens barrel 50 are moved forward together by the focus switching mechanism (not shown), there is a gap between the outer ring 42 and the inner ring 43 that constitute the lens barrel holding ring 40. The interposed spring 33 is expanded, and the biasing force of the spring 33 prevents the front light shielding ring 30 from moving forward together with the lens barrel holding ring 40 and the lens barrel 50, but the engagement of the lens barrel holding ring 40 is prevented. When the stop collar 45 is engaged with the rear end surface 32 of the front light shielding ring 30,
The front light shielding ring 30 is connected to the lens barrel holding ring 40 and the lens barrel 5.
0 and is moved forward, resulting in the telephoto shooting state shown in FIG.

That is, when the lens barrel 50 to which the photographing lens 100 is attached is in the telephoto shooting state (see FIG. 2), the front light shielding ring 30 is in the normal shooting state (see FIGS. 1 and 3). ), the lens barrel holding ring 40 is moved back by the distance l between the rear end surface 32 of the front light shielding ring 30 and the locking collar 45 of the lens barrel holding ring 40 in the normal shooting state. Therefore, the front end opening edge 82 of the outer body Z to which the light-transmitting window glass 83 is attached can be moved back by this distance l.

Further, when the lens barrel 50 is moved forward, the focus switching light shielding member 60 is moved forward together with the lens barrel 50, and the rear light shielding ring 63 that constitutes the light shielding member 60 is pulled out from the light shielding tube 13. Therefore, it becomes possible to block light in a state where the range to be blocked is expanded.

Furthermore, when the lens barrel 50 is moved forward or backward,
The lens barrel 50 can be moved back and forth while the serpentine-shaped rear light shielding plate 61, which constitutes the focus switching light shielding member 60 fixed to the lens barrel 50, is fitted into the lens barrel guiding cylindrical body 12. It becomes smooth.

[Effect of idea]

As is clear from the above explanation, according to the present invention, even if the focal length switching magnification of a waterproof camera is increased, it is possible to block light while the range to be blocked is expanded, and the lens barrel can move smoothly forward and backward. This makes it possible to set back the front opening edge of the outer shell, which is fitted with a translucent window glass, and thereby reduce the degree of protrusion of the outer shell, thereby reducing the need for larger waterproof cameras. It became possible to provide

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal side view showing a normal shooting state, Fig. 2 is a longitudinal side view showing a telephoto shooting state, and Fig. 3 is a partial cutaway of the main part. The side view and FIG. 4 are rear views of some of the main parts. X...Waterproof camera, Y...Camera body, 10
... Camera body, 11 ... Stepped portion for diameter expansion, 12
... Lens barrel guide cylindrical body, 13 ... Light-shielding tube, 20 ...
...Front light shielding plate, 30...Front light shielding ring, 32...Rear end surface, 33...Spring, 34...Spring receiving claw, 40
... Lens barrel holding ring, 41 ... Disc, 42 ... Outer ring, 43 ... Inner ring, 44 ... Light guide port, 45 ... Locking flange, 46 ... Notch groove, 50
... Lens barrel, 60 ... Focus switching light shielding member, 61
... Rear light-shielding plate, 63 ... Rear light-shielding ring, Z ... Outer body, 80 ... Front cover, 81 ... Cylindrical body part for protecting the lens barrel guiding cylinder, 83 ... Transparent window glass, 9
0...Back cover.

Claims (1)

[Scope of utility model registration request] A serpentine-shaped front light-shielding plate fixed to the front end surface of the lens-barrel guiding cylindrical body of a camera body, in which a lens-barrel guiding cylindrical body is concentrically protruded from the front end of the light-shielding tube via a diameter-enlarging step. A front light-shielding ring having a plurality of spring receiving claws on its rear end face is fitted so as to be movable back and forth, while a locking collar that is engaged with the rear end face of the front light-shielding ring and the spring receiving claws are loosely fitted. A lens barrel holding ring in which an outer ring with a cut groove at the rear end to hold the lens barrel and an inner ring that holds the lens barrel are integrally formed on the rear surface of a disk having a light guide port in the center with a gap between them. A spring received by the spring receiving pawl is interposed between the outer ring and the inner ring, and is fitted into the front light shielding ring so as to be able to move forward and backward, and at the rear end of the lens barrel. A focus switching light-shielding member integrally formed with a snake's eye-shaped rear light-shielding plate that is retractably fitted into the lens barrel guiding cylindrical body and a rear light-shielding ring that is retractably fitted into the light-shielding tube. The camera body is fixed to the front part, and the rear part of the front cover is formed with a cylindrical body for guiding the lens barrel and a cylindrical body for protecting the lens barrel. A waterproof camera characterized in that the back cover is housed in a hinged outer shell so that it can be closed watertight.