JPH01231035A - Camera - Google Patents

Abstract

PURPOSE:To sufficiently utilize a protecting function which is produced when a barrier is fully closed by providing a barrier opening-/closing-state detector, lens barrel position detector, and warning means which warns users of closing of the barrier when the means detects that the barrier is at its opened state in the state where the lens barrel is in its collapsing state. CONSTITUTION:A barrier opening-/closing-state detector 5 which detects the opening- and closing-states of a barrier 1 is provided against the barrier 1. A controller 10 performs warning control which asks a user to close the barrier when the detected output indicating that the barrier 1 is opened is obtained from the detector 5 in the state where the closed state of a back cover is detected by a back cover detector 8 and the collapsing state of a lens barrel 3 is detected by a lens barrel position detector 7. The warning control asking a user to close the barrier performed by the controller 10 is executed by thrusting the lens barrier 3 by means of a lens barrel driving device 6. In addition, a warning device 12 is connected to the controller 10. Therefore, contamination and damage of the photographing lens which are produced when the camera is left untouched or put in a bag, with the barrier being opened, can be prevented certainly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera equipped with a full barrier that protects a lens barrel.

[Conventional technology] In recent years, cameras with automatic focus detection function, etc.
1. A barrier that can be opened and closed is installed to prevent the photographic lens from getting dirty or scratched when not in use.

In this barrier type camera, there is a lens barrier type that protects only the lens aperture of the lens barrel, and a lens barrier type that protects only the lens aperture surface of the lens barrel, and one that protects only the optical parts such as the lens barrel, viewfinder window, and metering window of the autofocus detection element located at the front of the camera. There are two types of full barrier type scales that protect part or the whole.

On the other hand, in order to make the camera more compact, some Fluva 976 cameras have a lens barrel that retracts into the camera body when not in use, and which protrudes to the i-shadow position when in use. It is known that J3 is a camera with a collapsible lens barrel.1 For example, when the photographer closes the barrier, the initial movement of the barrier closing is detected and the lens barrel automatically closes. Consideration is being given to collapsing the barrel to a storage position that does not interfere with barrier closure.

Furthermore, the lens barrel collapses not only when the barrier is closed, but also when the lens barrel hits an object and stops moving when the lens barrel is moved to protrude in conjunction with the opening of the barrier, when the end of the film is detected, or when manual winding occurs. Immediately before film rewind based on rewind operation,
Furthermore, even if the lens barrel is left in the imaging position for a predetermined period of time without performing any imaging operations, these conditions are determined and the lens barrel is automatically collapsed.

[Problems to be Solved by the Invention] However, in a full-barrier camera equipped with a function to collapse the lens barrel, the lens barrel automatically collapses when a predetermined condition is obtained, even when the barrier is closed. Because the barrel is collapsing,
There are cases where the lens barrel is left unclosed or stored in a bag, etc. due to the damage to the lens barrel. There was a risk that the lens would not be used effectively and the lens would get dusty or scratched.

The present invention has been made in view of these conventional problems, and an object of the present invention is to provide a camera that can fully utilize the protective function of closing a full barrier.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a barrier that can be opened and closed (full barrier method) that protects the optical part located in the front of the camera including the lens barrel, and a closure of the barrier. In a camera equipped with a lens barrel drive unit that retracts the lens barrel protruding from the imaging device to a position where the barrier can be closed when a predetermined line A'1 including the start time is obtained, The sensor 115 is equipped with a barrier opening/closing detector that detects opening/closing of the barrier and a lens barrel position detector that detects the position of the lens barrel, and detects that the barrier is in the open position while the lens barrel is detected to be collapsed. is designed to provide a warning means to warn of barrier closure.

This warning means not only gives an acoustic or optical warning, but also drives the lens barrel to move in and out within a predetermined range to urge the barrier to close.

[Function] In the camera of the present invention, if the camera is left with the lens barrel retracted without closing the barrier or the camera is placed in a bag or the like, a warning is issued prompting the user to close the barrier.
Since the barrier is closed in response to this warning, the barrier is reliably kept closed when not in use, and the protective function of the barrier can be fully utilized.

[Example] FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a manually opened barrier, and the barrier 1 is provided, for example, in a camera as shown in FIG.

FIG. 2(a) shows the open state of the barrier 1, and FIG. 2(b) shows the open state of the barrier 1.
indicates the closed state of barrier 1. That is, the barrier 1 is provided so as to be slidable laterally so as to cover and protect a lens barrel 3 equipped with a dynamic lens and a finder window 4 provided at the front of the camera body 2 in a closed state. Opening from the closed position is performed manually by the decoy person. On the other hand, when the barrier 1 is manually slid to the open position shown in FIG. By pressing the lock release m, the lock can be automatically closed by the force of a spring, etc. Of course, opening and closing may also be done manually.

Further, in the embodiment shown in FIG. 2, the barrier 1 is sized to cover the lens barrel 3 and the finder window 4, but a barrier 1 of an appropriate size may be used as long as it can cover at least the lens barrel 3. .

Referring again to FIG. 1, the barrier 1 is provided with a barrier opening/closing detector 5 for detecting opening/closing of the barrier.

Further, as shown in FIG. 2, a lens barrel 3 provided in the camera body 2 so as to be freely retractable is driven by a lens barrel driving device 6. As shown in FIG. The lens barrel driving device 6 drives the lens barrel 3, for example, to either a wide position or a telephoto position in response to a selection operation by a decoy photographer. Of course, the longer the lens barrel 3 protrudes from the wide position, the shorter the lens barrel 3 protrudes, and the longer the lens barrel 3 protrudes from the tele position.

The lens barrel 3 driven by the lens barrel drive device 6 is connected to a lens barrel position detector 7h for detecting the lens barrel position.

Furthermore, a back cover opening/closing detector 8 for detecting opening/closing of the back cover of the camera body 2, which is opened when a film is attached or removed, is stepped.

Reference numeral 10 denotes a control device, and the control device 10 includes a barrier opening/closing detector 5, a lens barrel position detector 7, and a back cover opening/closing detector 8.
are connected, and barrier warning control is performed to urge the barrier 1 to close based on the detection conditions of these detectors. That is,
When the back cover detector 8 detects the closed state of the back cover and the lens barrel position detector 7 detects that the lens barrel 3 is in the retracted position, the controller 10 detects the barrier opening/closing state by the barrier opening/closing detector 5. When an open detection output is obtained, warning control is performed to prompt the barrier to close. The warning control by the control device 10 that prompts barrier closing is carried out by the lens barrel drive device 6.
in place! β, for example, the protrusion opening is made to protrude at the shortest wide position. Furthermore, for the control device 10,
A warning device 12 is connected, and in addition to the warning caused by the lens barrel drive device 6 protruding the lens barrel 3 to the wide 3'l position, the warning device 12 displays a warning acoustically and/or optically. Good too. This acoustic and/or optical warning display by the warning device 12 may be provided by a dedicated device, but in order to simplify the camera configuration, an indicator already installed on the camera body 2, For example, it is desirable to use a self-timer indicator, a buzzer indicator light for warnings generated during normal photographing operations, etc.

Further, the control device 10 has a function of controlling the lens barrel 3 by the lens barrel drive device 6 when a predetermined condition is met during use of the camera, in addition to warning control to prompt the closing of the barrier.

The driving control of this lens barrel is to sink the lens barrel 3 in response to the 1 position setting of the imager's 'rt shadow mode when the barrier 1 is opened @shadow.
Protrusion control to protrude from the body position to either the wide position or tele position, and the lens barrel 3 after protruding to the appropriate enemy shadow position.
There are two controls υV that prevent the camera body 2 from returning to its retracted position. Furthermore, focusing control may be added. The control to return the lens barrel 3 from an appropriate projection position to the collapsing device can be performed, for example, when the lens barrel 3 hits an object and stops moving while being driven to project to a predetermined projection position, when the end of the film is detected, or when a manual operation is performed. This is performed immediately before film rewinding based on a rewinding operation, or furthermore, when the lens barrel 3 is placed at the exposure position for a predetermined period of time without any photographing operation being performed. Of course, the line 11 for returning the lens barrel 3 from the photographing position to the collapsing position is not limited to this, and may be performed when appropriate photographing conditions or usage conditions are obtained.

Next, the process for issuing a warning prompting barrier closure according to the embodiment of FIG. 1 will be described with reference to the flowchart of FIG. 3.

During decoy photography, the lens barrel 3 of the camera body 2 is moved as shown in Figure 2.
When Ying Changro manually opens the barrier 1 which is in the closed state covering the lens barrel 3, the lens barrel drive device 6 moves to the wide position.
highlighted by. In this state, a daylight operation can be performed by performing a shutter release operation. Further, the telephoto position and the wide position can be switched by operating an operation member (not shown).

In such a state of use of the camera, a barrier warning routine including a lens barrel collapsing process shown in FIG. 3 is executed.

First, the barrier warning routine should be executed upon receiving an interrupt when the following four conditions are met.

- Determines when a predetermined period of time has elapsed without any operation being performed at the lens barrel protrusion position.

・Detects the end of the film.

・Identifies manual rewind operation.

・Detects whether the lens barrel is protruding or not.

When any one of these conditions is satisfied and an interrupt is generated, first, in step S1, a lens barrel retracting process B11 is performed to pull the lens barrel into the retracted position. When the lens barrel is sunk in step S1, the process proceeds to step S2 and the rear Mr'
After checking the presence or absence of the J1 chain and determining whether mW is closed based on the detection output of the back cover opening/closing detector 8, a timer is started in step S3.

Subsequently, in step S4, it is checked whether the barrier 1 is in the open state based on the detection output of the barrier open/close detector 5. At this time, if the barrier 1 is in the open state, whether or not the set time of the timer started in step S5 has been reached;
That is, the presence or absence of time-up is checked, and step S4. Repeat the process of S5.

If time up is determined in step S5, step S
Proceed to step 6 to issue a barrier warning.

In other words, even if the barrier warning conditions of the back cover being closed and the barrier being open are obtained, the barrier warning is not issued immediately, but a time lag is set for a certain period of time by a timer start, and during this period, whether or not the barrier is closed is monitored. A barrier warning is given when the barrier is not closed even after a period of time has elapsed.

In the barrier warning of step S6, the lens barrel drive device 6
This causes the lens barrel 3 to protrude, for example, to a wide position, and the warning device 12 lights up a buzzer or lamp to warn the enemy that the barrier 1 is in the open state.

On the other hand, if it is determined in step S2 that the back cover is open, the process proceeds to another process in step S7. The separate process in step S7 is simply a process of checking whether or not the back cover is closed, and all other processes are stopped, resulting in a power save mode in which the power consumption of the power supply is reduced.

Further, when it is determined in step S4 that the barrier is closed, the process proceeds to another process in step S8. The other processing in step S8 is only a manual rewind operation and a barrier opening check, and the other processing is stopped, resulting in a power save mode.

Therefore, for example, if a predetermined period of time elapses without any enemy shadow movement being performed, the condition of ``a predetermined period of time or more has elapsed without any operation being performed at the lens barrel protrusion position'' is met, and the automatic The lens barrel 3 is driven to the retracted position,
If the barrier 1 is not closed at this time, a warning will be displayed by the protruding drive of the lens barrel 3 and/or a buzzer lamp to urge the barrier to be closed. In such a case, the barrier 1 is closed, and it is possible to prevent the camera from being left unattended with the lens barrel 3 retracted and the barrier 1 open, or from being stored in a bag.

In the above embodiment, when the barrier warning condition is set to 1q, the lens barrel 3 is projected to the wide position where the amount of projection is the least, but the lens barrel 3 is projected to the wide position for warning. The projection is not limited to this, and the projection may be extended to a tele position where the amount of projection is even larger.

Furthermore, if the barrier warning condition is established and the lens barrel 3 is extended to the wide or tele position after the barrier 1 is stored in a bag etc. with the barrier 1 open, the lens barrel 3 may be In some cases, the lens barrel 3 may not be able to protrude to the planned position and may stop. In such a case, the lens barrel 3 will be driven to protrude by detecting that the lens barrel 3 cannot be protruded to the wide position or telephoto position for a predetermined period of time. It is desirable to stop the

Further, when the lens barrel 3 hits an object and stops, it is desirable to drive the lens barrel 3 back to the retracted position, since there is a risk of damaging the lens if the lens barrel 3 is left in the stopped state.

In this case, when the barrel is returned to the retracted position, the barrier warning condition is set to 1 again.
However, in this case, the warning drive is completed with one lens barrel drive operation.

Furthermore, if the barrier warning condition is satisfied and the lens barrel 3 is driven to protrude while stored in a bag or the like, there is a risk that the lens may be damaged or soiled by the protrusion of the lens barrel.
As soon as Barrier Warning Rule 1' is established, the photometric output obtained from the photometric element installed in the camera body is checked, and if the surrounding area is in a dark state where the photometric output is less than the predetermined brightness, the camera, etc. It is desirable to determine that the lens barrel is in the stored state and to prohibit the warning operation by protruding the lens barrel.

Further, in the embodiment of the present invention, even if collapsing of the lens barrel and opening of the barrier are detected when the back cover is opened [1], a warning operation such as protrusion of the lens barrel is not executed. This is because when the back cover is open, the front of the camera is often held in order to take in and take out the film, or the front of the camera is placed on a stand. This is to prevent damage to the cylinder. Of course, if you close the back cover after loading and unloading the film, the lens barrel will stick out as a warning.

[Effect of the invention 1] As explained above, according to the present invention, even if the lens barrel is collapsed and left with the barrier open, or stored in a bag or the like, the projection drive of the lens barrel and/or acoustic A warning to close the optical barrier will be issued, and the enemy will close the barrier in response to this warning. It is possible to reliably prevent stains and scratches.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the present invention; Fig. 2 is an explanatory diagram showing the open/closed state of the full barrier according to the present invention; Fig. 3 is a flowchart showing barrier warning processing according to the present invention. be. 1: Full barrier 2: Camera body 3: Lens barrel 4: Window window 5: Barrier open/close detector 7: Lens barrel position detector 8: Back cover/close detector 10: Control device 12: Warning device

Claims (3)

[Claims] (1) A barrier that is manually opened to protect at least the front part of the camera including the lens barrel, and a barrier that closes the lens barrel that is projected to the shooting position when a predetermined condition is obtained, including when the barrier starts closing. A camera equipped with a lens barrel drive unit that retracts the lens barrel to a possible position, comprising: a barrier opening/closing detector that detects opening/closing of the barrier; and a lens barrel position detector that detects the position of the lens barrel; A camera characterized in that a warning means is provided for warning that the barrier is closed when it is detected that the barrier is in an open position in a state in which collapsing of the lens barrel is detected. (2) The camera according to claim 1, wherein the warning means causes the lens barrel to protrude to a predetermined position. (3) The camera according to claim 1, wherein the warning means provides an acoustic or optical warning.