JPH0591398A - Camera - Google Patents

Abstract

PURPOSE:To prevent the generation of focus deviation at the time of reuse by providing a link bringing the focus changeover lever of the lens to the neutral position with a dustproof cover slided to the front of the lens. CONSTITUTION:Sliding a changeover lever upward from the standard neutral position, it becomes a wide angle state, and a link 45 is inclined shown by alternate long and short dash line. Accordingly, when a cover 9 is closed in this state, a collation part 48a is collated with a lower end 45a of the link 45, rotating the link 45 to the horizontal position shown by a solid line. A connection board 41, that is, a changeover lever 40 is returned to the neutral position, and a lens 7 is returned to the standard position. When sliding down the changeover lever 40 with the cover 9 opened, the link 45 is inclined in the opposite direction to become a telephoto lens state. When closing the cover 9 in this state, the collation part 48b is collated with the lower end 45b of the link 45, returning the link 45 to the horizontal state. Therefore, the changeover lever 40 is returned to the neutral position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera suitable for being applied to a camera-integrated VTR.

[0002]

2. Description of the Related Art In a camera, the original optical system and the optical system of a finder are almost common in most cases, and the object image to be originally photographed can be known through the finder. That is, it is possible to know whether it is a wide-angle state, a standard state, a telephoto state, or the like.

[0003]

By the way, the camera is constructed in a simpler structure, and therefore, the original optical system is the three-stage switching of wide angle, standard, and telephoto as described above, and the viewfinder is the original optical system. It is conceivable that the optical system of this finder has a fixed focus configuration in which the above switching is not performed at all.

With such a configuration, if the camera is continuously taking images, the photographer currently remembers which state the optical system of the camera is in.
The focus can be switched at any time, but once it is not used, this is often forgotten. Therefore, when used again, if there is a wide-angle or telephoto (so-called zone focus position) other than the standard, there is an inconvenience that the possibility of causing focus shift increases. The present invention has been made in view of the above problems, and an object thereof is to prevent the possibility of defocusing during re-use.

[0005]

In the camera of the present invention, for example, when the dustproof cover 9 of the lens 7 configured to switch the focus as shown in FIGS. 1 and 8 is opposed to the lens 7, that is, the lid is closed. The dust cover 9 operates the link 45 so that the focus switching lever of the lens 7 is brought to the neutral position, that is, the standard position of the lens system.

[0006]

Operation Once the lid is closed, the lens 7 is always switched to the standard position, so that so-called defocusing does not occur during subsequent imaging.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The case where the camera according to the present invention is applied to a camera-integrated VTR will be described with reference to the drawings.

The camera-integrated VTR according to the present embodiment is constructed by separating a main body 1 and a grip body 2, and the case bodies 3 and 4 of both 1 and 2 are made of synthetic resin. And the main body casing 3 is formed in a substantially rectangular parallelepiped shape,
The grip casing 4 also has a substantially rectangular parallelepiped shape, but has a curved surface extending from the upper surface 4c to the right side surface 4f and the lower surface 4d so as to conform to the palm of the right hand of the photographer.

A camera unit 5 and a VTR unit 6 are housed in the body casing 3, and the front face 3 of the body casing 3 is further housed.
The window frame 47 is fixed at a position slightly retracted from the front surface 3a so as to face the rectangular window hole 8 formed in the upper part of a, and the objective lens 7 of the camera unit 5 is formed in this window frame 47. It is exposed from the window. And this front 3
A dustproof cover 9 is attached to the rear side of a by a suitable means so as to be vertically slidable between it and the window frame plate, and its upper edge is slightly smaller than the window hole 8 of the front surface 3a. It projects outward and serves as a knob portion 10 of the cover 9. The cover 9 is click-held at two positions: a state in which the cover 9 is slid downward as shown in FIG. 1, that is, an open state, and a state in which it is slid upward as shown in FIG. 2, that is, a closed state. .

A lid 11 is attached from the upper surface 3c to the left side surface 3e of the body casing 3 so as to have the same contour as the body casing 3, and the lower edge of the lid 11 is attached to the body casing 3 as a hinge. The tape cassette (not shown) is detachably mountable to the cassette mounting portion (not shown) of the VTR unit 6 when the lid 11 is opened. Has been done.

On the other hand, in the grip body 2, the optical viewfinder 12 is provided in the upper part of the grip housing 4.
Is incorporated. Reference numeral 13 denotes the objective lens, which is exposed at the upper part of the front surface 4a of the grip casing 4 through a window hole 14 formed therein. A so-called eyecup 15 made of an elastic material is attached to the upper end of the rear surface 4b of the grip case 4, and an eyepiece lens (not shown) is attached to the eyecup 15.
3, an optical system is formed between the eyepieces and an optical viewfinder 12 is formed. The optical viewfinder 12 is completely independent of the optical system including the objective lens 7 of the camera unit 5 described above.

A battery 16 is detachably accommodated in the grip casing 4. Reference numeral 17 denotes an entrance / exit of the battery 16, which is formed on the front surface 4 a of the grip casing 4. In addition, when the battery is taken out from this, the doorway 17
A lid 18 (see FIG. 2) is provided so as to close the lid 18. When the battery is stored, the lid 18 is pushed open at its tip and pushed down inside, and the battery is pulled out to remove the lid 18 Will automatically get up and exit 1
It is configured to close 7. In FIG. 2, the lid 1
The reference numeral 8 indicates a state in which the undulation is in the middle. In addition, the band 1 is attached to the grip case 4 so as to face the right side surface 4f.
9 is attached, and the photographer inserts his or her right hand between the band 19 and the grip casing 4 to grip the grip casing 4.

The right side surface 3f of the main body casing 3 and the left side surface 4e of the grip casing 4 are coupling side faces which are in contact with each other, and coupling means are formed on each of these faces. This will be described with reference to FIGS. 4 and 5. On the right side surface 3f of the body casing 3, a plurality of L-shaped hooks 20 (four in the figure) are attached in a state of facing forward. On the other hand, the left side surface 4 of the grip housing 4
In e, a recess 21 is formed so as to face each of the hooks 20 described above, and further, an engaging recess 22 that advances forward in the grip casing 4 is formed continuously with each recess 21.

Therefore, when the hooks 20 of the body casing 3 are fitted into the recesses 21 of the grip casing 4, the right side surface 3f of the body casing 3 and the left side surface 4e of the grip casing 4 are in close contact with each other. Then, in this state, by relatively moving the body casing 3 forward, the tips of the hooks 20 are moved to the respective recesses 2
Inserted in the engaging recess 22 in 1, the 3 and 4 are united. That is, the main body 1 and the grip body 2 are united.

In order to lock in this combined state, a locking means described below is provided. That is, FIG. 3 and FIG.
As shown in Fig. 6, a lever 23 is attached to the rear surface 4b of the grip casing 4 so as to be slidable in the left and right directions.
As shown in FIG. 5, this is always slid and biased toward the main body casing 3 side by the spring 24, and the hook 20 is prevented from moving (sliding) in the concave portion 21 by the locking piece 25 connected to the lever 23. It is configured.

Therefore, when the main body casing 3 and the grip casing body 4 are combined, when the hook 20 enters the recess 21,
The locking piece 25 retracts against the spring 24, and as shown in FIG. 6, once the hook 20 enters the engaging recess 22, the locking piece 25 projects into the recess 21 to lock the hook 20. Will be done. Such locking means 26 may be provided in any one recess 21.

In the state shown in FIG. 6, the lever 23 is moved to the spring 2
In the state of sliding in the opposite direction to the body casing 3 against 4, the body casing 3 is relatively moved rearward,
Both 3 and 4 can be separated from each other.

A plurality of electrical contacts 27 made of a metal plate are formed on the above-mentioned connecting side surface, that is, the right side surface 3f of the main body casing 3, while the left side surface 4e of the grip casing body 4 is formed.
A plurality of electrical contacts 28 made of conductive pins are attached so as to face each contact 27, and when the both 3 and 4 are combined and combined as described above, the contacts 27 and 28 are in electrical contact with each other. A power supply current is supplied from the battery 16 in the grip casing 4 to the camera unit 5 and the VTR unit 6 in the body casing 3, respectively. Further, a push button 30 for a trigger switch is provided on the rear surface 4b of the grip casing 4.
The signal from this is also supplied to the main body 1 through one of the contacts 27 and 28 described above. Actually, the push button 30 is put into a standby state by the first first push, and the tape is run and recording is performed by the next second push.

As is apparent from FIG. 4, an optical mode display section 31 including a plurality of (four in this example) light emitting elements is provided on the right side surface 3f (coupling side surface) of the main body casing 3, On the other hand, on the left side surface 4e (combining side surface) of the grip casing 4, as is apparent from FIG. 5, at the position facing the optical mode display portion 31 of the main casing 3 described above, the light guide portion 3 is provided.
4 are formed.

That is, a plurality of (in this example, four) window holes 32 are provided so as to face each light emitting element of the optical mode display section 31, and a rectangular shape is formed at the focal position in the optical system of the optical viewfinder 12. The mask 33 of FIG. 3 is arranged (see FIG. 3), and the four corners of the mask 33 and the above-mentioned window holes 3
An optical conduit 35 (optical fiber) made of plastic or glass is provided between the two. That is, one end of the light pipe is just fitted into the window 32, and its end face is directly opposed to the optical mode display portion 31 of the main body casing 3,
The other end is just fitted into the window holes formed at the four corners of the mask 33. FIG. 7 shows an example of an image that can be seen through the viewfinder 12.
The end surface of each light pipe 35 is located outside the field frame 36 of. Therefore, the camera section 5 and the VTR section 6 in the main body 1
The optical mode display section 3 of the main body 1 according to each mode state of
When the light-emitting elements such as the LEDs that constitute 1 are turned on, the lighting is displayed in the optical viewfinder 12, respectively.

Next, an example of mode display will be described. For convenience of explanation, reference numerals (a) to (d) are especially attached and shown in FIG. First, (a) is turned on when the color temperature is low such as when capturing an image in a room. In this case, the color filters in the optical system in the camera unit 5 in the main body 1 may be switched. Reference numeral 37 shown in FIG. 2 denotes this switching lever, which slides up and down. (B) is a display of a standby state. That is, when the push button 30 described above is pushed once, this (b) is lit. When the push button 30 is pushed again, (b) is turned off and (c) is turned on to indicate that the image is being captured (recording). (D) displays the insufficient light amount state. In this case, lighting is sufficient. still,
Means for causing the light emitting elements in the optical mode display section 31 to emit light to display the above-described modes of the camera section 5 and the VTR section 6 in the main body 1 are well known, and therefore detailed description thereof will be omitted. Further, as these light emitting elements, those having different colors can be used.

The camera section 5 of the main body 1 is an objective lens 7
By moving back and forth, it is possible to switch to three positions of telephoto, standard and wide-angle. As shown in FIG. 8, the lens 7 is moved back and forth by a fixed tube which houses the lens barrel 38 in a thread groove 39 formed on the outer peripheral surface of the lens barrel 28 of the lens 7 and guides the lens barrel 38 back and forth. On the other hand, as shown in FIG. 2, a focus switching lever 40 that slides up and down is provided at the front part of the left side surface 3e of the main casing 3 as shown in FIG. As shown in FIG. 8, a part of the connecting plate 41 attached to the rear surface of the switching lever 40 is extended to the front of the lens barrel 38, and the notch 43 formed in the extension portion 42 is opposed to the lens barrel 38.
The projection 44 that is projected on the front surface of the lens barrel is engaged, and the upper, middle, and lower sliding of the switching lever 40 causes the lens barrel 38 to move forward and backward, so that the optical system of the camera unit 5 enters so-called wide-angle, standard, and telephoto states. .

A link 45 is provided below the lens barrel 38, and the link 45 is connected via a shaft 46 to the body casing 3.
Is attached to the rear surface of the window frame 47 (the window frame 47 is shown in FIG. 1) fitted to the rear of the window hole 8 in a seesaw-free manner. And one end of this link 45 is bent,
This bent portion 45c is the through hole 42 of the extension 42 of the connecting plate 41.
When the switch lever 40 is loosely engaged with a and the switching lever 40 is in the neutral (standard) position, the link 45 is in a substantially horizontal state as shown by a solid line in FIG.

On the other hand, as shown in FIG. 8, the dustproof cover 9 is formed with abutting portions 48a and 48b on the left and right of its lower end, and the dustproof cover 9 is slid upward as shown in FIG. When the front side of the lens 7 is shielded, these abutting portions 48a and 48b are in contact with the left and right lower ends 45a and 45b of the link 45, respectively, or face each other with a slight gap.

Therefore, when the switching lever 40 is slid above the standard (neutral) position, the wide angle state is established, and the link 45 is inclined as shown by the alternate long and short dash line. Therefore, when the cover 9 is closed in this state, the abutting portion 48a is linked to the link 45.
It abuts against the lower end 45a of the and is rotated to a substantially horizontal position shown by a solid line. As a result, the connecting plate 41, that is, the switching lever 40 returns to the neutral position, that is, the lens 7 also returns to the standard position.

Further, when the cover 9 is opened, the switching lever 40
When is slid downward, the link 45 tilts in the opposite direction to the above, and is in the telephoto state. When the cover 9 is closed in this state, the abutting portion 48b thereof abuts the lower end 45b of the link 45 to return the link 45 to a substantially horizontal state. That is, the switching lever 40 returns to the neutral position. In this case, the abutting part 48b
Accordingly, the lower end edge of the extension 42 of the connecting plate 41 can be pushed up.

As described above, the optical system of the camera unit 5 can be set to the standard state by closing the cover 9 which is not used. Therefore, at the time of subsequent image capturing, the image is captured in the standard state unless the switching lever 40 is operated. It will be.

Inside the body casing 3, as shown in FIG. 8, a cover opening detection switch 50 is provided below the dustproof cover 9.
Is attached, and the switch 50 is turned on, for example, when the cover 9 is opened.

The switch 50 is connected in series with other switches 51a, 51b, 51c, ... As shown in FIG. These switches 51a, 51b ...
.. are, for example, a switch for erroneous tape erasure prevention detection, a switch operated by the push button 30 described above, and the like. The DC power supply terminal 52 is grounded through the resistor 53 and the series circuit of each of the switches 50, 51a, 51b, ..., 51n described above, and the series circuit of each switch and the resistor 5 are connected.
The connection point with 3 is connected to the control terminal 55 of the computer 54. The computer 54 controls various operations of the camera section 5 and the VTR section 6, and does not operate when a DC potential (voltage) is applied to its control terminal 55.

Therefore, when all the switches are turned on, that is, all the recording conditions are satisfied, the control terminal 55 of the computer 54 becomes the ground potential, and the computer 54 becomes the operating state.

[0031]

According to the present invention described above, in the camera section 5 of the main body 1, at the time of photographing (imaging), the switching lever 40 is operated to use in a wide-angle or telephoto state other than the standard position, and then dustproof. When the cover 9 is closed, the lens of the camera unit is automatically returned to the standard position. Therefore, even if the switching of the switching lever 40 is forgotten, the lens is not out of focus during the subsequent imaging. In particular,
When the optical system of the main body 1 and the optical system of the viewfinder are completely separate bodies, it is convenient because the state of the optical system on the main body side cannot be known.

[Brief description of drawings]

FIG. 1 is a perspective view seen from the front right when a camera according to the present invention is applied to a camera-integrated VTR.

FIG. 2 is a perspective view seen from the front left side.

FIG. 3 is a perspective view seen from the right rear side.

FIG. 4 is a perspective view of only the main body viewed from the right rear.

FIG. 5 is a perspective view of only the grip body as viewed from the left rear.

FIG. 6 is a partial cross-sectional view showing a combined state of the main body and the grip body.

FIG. 7 is an explanatory diagram showing a state when the optical viewer finder is removed.

FIG. 8 is a schematic perspective view showing the relationship between the dustproof cover and the lens of the camera section.

FIG. 9 is a control circuit for a computer.

[Explanation of symbols]

 1 Main body 2 Grip body 3 Main body case 4 Grip case 5 Camera section 6 VTR section 9 Dust cover 12 Optical viewfinder 20 Hook 31 Optical mode display section 34 Optical section 45 Link

Claims (1)

[Claims] 1. A link for bringing a focus switching lever of the lens to a neutral position in a state where a dust-proof cover slidingly covering the front of the lens is slid on the front surface of the lens. camera.