JPH07101271B2 - Camera with dust cover - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a dustproof cover which is provided on the front surface of a camera and which is moved along the front surface between a fully open position and a fully closed position by direct manual operation. The present invention relates to a camera in which the photographing optical system is exposed to enable photographing when the dustproof cover is in the fully open position, and the photographing optical system is covered to disable photographing when the dustproof cover is in the fully closed position.

[0002]

2. Description of the Related Art Conventionally, the photographing optical system of this type of camera is
It did not protrude from the dustproof cover. Therefore, the dustproof cover could be moved regardless of the position of the photographing optical system. On the other hand, recently, there has been proposed a camera in which the photographing optical system is electrically driven between a feeding position where the photographing optical system is largely extended from the front surface of the camera and a feeding position where the photographing optical system is extended from the front position.

[0003]

Considering the addition of a photographing optical system, which is largely driven by the electric drive, to the camera having the dustproof cover, there are the following problems. (A) If the dustproof cover can be moved to the fully closed position even when the photographing optical system is in the extended position, it is necessary to secure a space for accommodating the photographing optical system inside the dustproof cover. Is greatly protruded from the front of the camera, making the entire camera bulky and significantly impairing portability.

(B) If the dustproof cover is designed so that it can be displaced to the fully closed position only when the photographing optical system is in the retracted position, the dustproof cover is moved to the fully closed position when the photographing optical system is in the extended position. When doing so, it is necessary to separately add an operation of electrically driving the photographing optical system to the retracted position before manually moving the dustproof cover, and also to move the photographing optical system to the retracted position. In this case, it is necessary to manually move the dustproof cover to the fully open position and then electrically drive the photographing optical system to the extended position.
Therefore, although there is no problem in portability, the operability is poor, and if the operation of moving the shooting optical system to the extended position is added when the dust cover is in the fully closed position, the dust cover, shooting optical system, or It may lead to an accident that destroys the related mechanism.

(C) If the dustproof cover is driven to the fully open position or the fully closed position in conjunction with an operating member for electrically driving the photographing optical system to the extended position or the retracted position, the operating member and the dustproof cover are operated. An interlocking mechanism for interlocking the cover with that is required. This interlocking mechanism causes the internal mechanism of the camera to be complicated and large, and also increases the production cost.

An object of the present invention is to obtain a camera with a dustproof cover which is excellent in portability and operability and can be manufactured at a low cost.

[0007]

In order to solve the above problems, the camera with a dustproof cover according to the first aspect of the present invention has the following configuration (the reference numerals in the parentheses correspond to the embodiments). , The corresponding drawing numbers are attached for convenience). A dustproof cover (2) is provided on the front surface of the camera so as to be movable along the front surface, and is movable between a fully open position and a fully closed position by direct manual operation. A take-out position (FIG. 1) taken out from the dust cover when it is in a position, and a take-in position (FIG. 3) taken in from the dust cover when the dust cover is in the fully closed position. And an opening signal after the dust-proof cover is retracted from the front of the photographing optical system in the retracted position by the movement of the dustproof cover from the fully closed position to the fully opened position. (Sw1 is turned on), and a closing signal (Sw1 is turned off) is generated before the dust cover comes into contact with the photographing optical system at the feeding position by the movement from the fully open position to the fully closed position. Dust cover position Shooting optical system driving means (circuit of FIG. 7, which electrically drives the shooting optical system between the feeding position and the feeding position in response to the feeding means (Sw1, Sw1a) and the dust cover position detecting means. M, Sw3, Sw4, Sw7a of FIG.
Sw7b, Sw8a, Sw8b), the photographing optical system driving means moves the photographing optical system from the feeding position to the feeding position upon receipt of the open signal, whereby the photographing optical system driving unit is at the feeding position. Enabling photographing by the photographing optical system, and moving the photographing optical system from the feeding position to the feeding position when receiving the closing signal, thereby moving the dustproof cover to the fully closed position by the manual operation. A camera with a dust-proof cover that enables

A camera with a dustproof cover according to a third aspect of the present invention has the following configuration (corresponding reference numerals and corresponding drawing numbers are attached in parentheses for convenience). A dustproof cover (2) is provided on the front surface of the camera so as to be movable along the front surface, and is movable between a fully open position and a fully closed position by direct manual operation. A feeding position (Fig. 1) taken out from the dust cover when the position is in a position and a feeding position (Fig. 3) taken in from the dust cover when the dust cover is in the fully open position. When the movable photographic optical system (3, 26) and the dustproof cover are in the fully open position, an open signal (Sw) is generated.
1) and a closing signal (OFF of Sw1) when not in the fully open position, and the photographing optical in response to the dust cover position detecting means (Sw1, Sw1a). Photography optical system driving means (electrically driving the system between the feeding position and the feeding position) (circuit of FIG. 7, M, Sw3, Sw4, Sw7a, Sw7b, of FIG. 6).
Sw8a, Sw8b) and photographing prohibition means (Sw1a, 30) for controlling prohibition of photographing of the camera in response to the dust-proof cover position detecting means, and the photographing optical system driving means is operable to output the closing signal. When receiving, the photographing optical system is moved from the feeding position to the feeding position, whereby the dust cover can be moved to the fully closed position by the manual operation, and when the open signal is received, the photographing optical system is moved. The system is moved from the feeding position to the feeding position, thereby enabling the photographing by the photographing optical system in the feeding position, and the photographing prohibiting means prohibits the photographing when receiving the closing signal. A camera with a dustproof cover.

A camera with a dustproof cover according to a fourth aspect of the present invention has the following structure (corresponding reference numerals and corresponding drawing numbers are attached in parentheses for convenience). A dustproof cover (2) is provided on the front surface of the camera so as to be movable along the front surface, and is movable between a fully open position and a fully closed position by direct manual operation. The taking optical system (3) that can be moved to a feeding position that is taken out from the dust cover when it is in the position and a feeding position that is taken from the dust cover when the dust cover is in the fully open position. , 26), a dust-proof cover position detecting means (Sw1, Sw1a) for generating an open signal when the dust-proof cover is in the fully open position and a close signal when the dust-proof cover is not in the fully open position, and the photographing optical system. Is at the feed position, a feed signal (SW4 is OFF), when it is at the feed position, a feed signal (SW3 is OFF), and when it is between the feed position and the feed position. Intermediate signal Sw5 is turned off) in response to the photographing optical system position detection means (Sw3, Sw4, Sw5), and the dust-proof cover position detection means and the photographing optical system position detection means. A photographing optical system driving means (the circuit of FIG. 7, which is electrically driven between the retracted position and the retracted position).
M, Sw3, Sw4, Sw7a, Sw7b, Sw in FIG.
8a, Sw8b), and a photographing prohibiting means (Sw1a, Sw5, Sw5a, Sw5, 8b) for controlling the prohibition of photographing by the camera in response to the dust-proof cover position detecting means and the photographing optical system position detecting means.
30), the photographing optical system driving means, when receiving the closing signal, starts the moving movement of the photographing optical system from the feeding position to the feeding position, and receives the feeding signal. The feeding movement is stopped, whereby the dust cover can be moved to the fully closed position by the manual operation, and when the open signal is received, the photographing optical system moves from the feeding position to the feeding position. The feeding movement is started, and when the feeding signal is received, the feeding movement is stopped, thereby enabling the photographing by the photographing optical system at the feeding position, and the photographing prohibition unit is configured to perform the closing signal or the intermediate signal. If any of the above is received, the shooting is prohibited,
A camera with a dust-proof cover, which releases the prohibition of photographing when both the open signal and the feed-out signal are received.

[0010]

According to the camera with the dustproof cover of the first aspect of the invention, the amount of protrusion of the dustproof cover is made smaller than the amount of protrusion of the photographing optical system at the feeding position, so that excellent portability can be realized. When the dustproof cover is moved toward the fully open position, the photographing optical system is electrically driven to the extended position, and when the dustproof cover is moved toward the fully closed position, the photographing optical system is electrically driven to the retracted position. Since it is configured, a camera with good operability can be provided. Furthermore, since the dust-proof cover itself has a function as an operation member for electrically driving the photographing optical system, the structure is simplified and the production cost can be kept low.

In addition to this, according to the camera with the dustproof cover of the third aspect of the invention, the drive control of the photographing optical system and the photographing prohibition control are configured to be performed by the same dustproof cover position detecting means. When the dust cover is out of the fully open position, the shooting optical system is not only moved to the retracted position, but shooting is also prohibited, so if the dust cover is in a halfway position, for example, It is possible to prevent shooting in a state where the lens contacts the shooting optical system and adversely affects the optical performance, and it can be realized with a simple configuration.

In addition to this, according to the camera with the dustproof cover of the invention of claim 4, the photographing optical system position detecting means is added so that the photographing optical system reaches the extended position even when the dustproof cover is at the fully open position. Since the photographing is prohibited as long as the intermediate position is not present, it is possible to prevent the photographing in a state where the imaging optical system cannot obtain a good image.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is a camera whose focal length is variable as an optical action of the photographing optical system. FIG. 1, FIG. 2 and FIG. 3 each show a plan view of an embodiment of the present invention. In each figure, a dust cover 2 is provided on the front surface of the camera body 1 so as to be displaced in the left-right direction in the figure, and the photographic optical system 3 is displaceably provided in the up-down direction in the figure, that is, it can be extended and retracted. A focal length selection member 4 for switching the focal length of the taking lens is provided on the upper surface of the camera body 1 so as to be always operable.

In FIG. 1, the dustproof cover 2 is in the fully open position. The focal length selection member 4 is located at the telephoto position where the focal length of the photographic optical system 3 is in the telephoto region, and faces the letter “T” attached to the upper surface of the camera body 1. Shooting optical system 3
Is at the feeding position protruding from the front surface of the dustproof cover 2,
A sub-photographing optical system 26 (FIG. 5), which will be described later, is inserted into the photographing light flux.
(Shown in FIG. 3) and a synthetic optical system are configured to have a focal length in the telephoto region.

In FIG. 2, the dustproof cover 2 is in the fully open position. The focal length selection member 4 is at a wide-angle position that sets the focal length of the photographing optical system 3 to a wide-angle region, and faces the letter “W” attached to the upper surface of the camera body 1. At this time, the photographic optical system 3 is at the retracted position where it is retracted into the camera body 1 from the retracted position, and the sub-photographic optical system 26 is retracted from the photographic light flux. The taking optical system 3 has a focal length in a wide-angle range.

In FIG. 3, the dustproof cover 2 is in the fully closed position and covers the photographing optical system 3. At this time, the photographing optical system 3 is in the retracted position even though the focal length selection member 4 is in the telephoto position. When the dustproof cover is in this fully closed position, the indicator 2 attached to the upper surface of the dustproof cover 2 makes it possible to see from the upper part of the camera that photography is not possible.
“A” faces the character “OFF” attached to the upper surface of the camera body 1.

A switch Sw in which a sliding contact piece is fixed to the dustproof cover 2 is provided at a part of the camera body of FIG.
1 is shown. The switch Sw1 is turned on when the dust cover 2 is at the fully open position, and is turned off when the dust cover 2 is displaced from the fully open position toward the fully closed position. This switch Sw1
Is a motor 12 (see FIG. 4) for displacing the photographing optical system 3, which will be described later.
Through FIG. 6), the power supply to a shutter control circuit 30 (shown in FIG. 6) described later is controlled.

A switch Sw2 having a sliding contact piece fixed to the focal length selecting member 4 is shown in a part of the camera body of FIG. The switch Sw2 is switched according to the position of the focal length selection member 4 and controls the rotation direction of a motor 12 to be described later that displaces the photographing optical system 3. The switch Sw2 is turned on when the focal length selection member 4 is in the telephoto position and is turned off when it is in the wide-angle position.

FIG. 4 is a perspective view of a displacement mechanism which is a mechanical component of the optical system driving means of this embodiment. This figure shows a state in which the photographic optical system is in the extended position. An opening 10a through which the photographic light flux passes is provided in the central portion of the base plate 10, and is indicated by a dot-dash line in front of it. The aperture / shutter device 11 and the photographing optical system 3 are fixed. A motor 12 is fixedly mounted on the upper back surface of the base plate 10, and a bevel gear 12a (illustrated in FIG. 5) is fixedly mounted on the tip of a rotary shaft (shown in FIG. 5) parallel to the base plate 10. A bevel gear 13 axially supported by the base plate 10 meshes with the bevel gear 12a, and a spur gear portion of the gear 13 also meshes with a gear 14 also axially supported by the base plate.
A through hole is formed in the center of the gear 14, and a female screw whose center is the rotation center of the gear 14 is cut in the through hole. A male screw cut on the guide shaft 15 is screwed into the female screw. The guide shaft 15 extends in the optical axis direction, has a distal end fixed to the substrate 1a of the camera body, and a distal end penetrating the through hole of the base plate 10 in a loose fit state. Two guide shafts 16 and 17 both extending in the optical axis direction are also implanted in the substrate 1a. The guide shaft 16 penetrates through the through hole 10c of the overhanging portion 10b and the through hole 10d of the base plate 10 protruding from the back surface of the base plate in a loosely fitted state. A spring receiving flange portion 16a is fixedly provided in the middle of the guide shaft 16, and a spring 18 is disposed between the flange portion 16a and the overhanging portion 10b. This spring 18 connects the base plate 10 to the substrate 1 via the overhanging portion 10b.
By pressing in the direction of a, the backlash that occurs at the screwed portion between the gear 14 and the guide shaft 15 is removed. The guide shaft 17 penetrates the elongated hole 10e of the base plate 10 in a loosely fitted state. With such a configuration, when the motor 12 rotates, the base plate 10, the photographing optical system 3 and the aperture / shutter device 11 fixed to the base plate 10 are guided by the three guide shafts 15 to 17 to move to the feeding position and the feeding position. Is displaced in the optical axis direction.

A printed circuit board 19 is fixed to the right side surface of the base plate 10. Conductor lands 19a to 19c are provided on the surface of the printed circuit board 19, and three sliding contact pieces 20 to 22 fixed to the camera body can be slidably contacted thereto. The sliding contact piece 20 and the conductor land 19a compose a switch Sw3, the sliding contact piece 21 and the conductor land 19b compose a switch Sw4, and the sliding contact piece 22 and the conductor land 19c compose a switch Sw5. The switch Sw3 is a switch Sw when the photographing optical system 3 is at the feeding position, and a switch Sw4 is a switch Sw when the photographing optical system 3 is at the feeding position.
5 is OFF when it is in the middle of the feeding position and the feeding position
Becomes The switches Sw3 and Sw4 function as limit switches, and cut off the power supply to the motor 12 when the photographing optical system 3 is displaced to the retracted position or the retracted position. Switch Sw
Reference numeral 5 denotes a switch for disabling shutter release when the photographing optical system 3 is located at an intermediate position between the above two positions and a subject image cannot be formed on the film surface. A switch for cutting off power supply to 30 (shown in FIG. 6).

The film 23 is arranged between the base plate 10 and the substrate 1a. FIG. 5 is a front view of the sub-photographing optical system attachment / detachment mechanism arranged on the back surface of the base plate 10. In the figure, a reduction gear train 24 and a holder 25 are provided on the back surface of the base plate 10.
Is rotatably supported, and the holder 25 has a sub-photographing optical system 26
Is held. Input gear 24a of the reduction gear train 24
Engages with the spur teeth of the bevel gear 13,
The final gear 24b of the reduction gear train 24 and the holder 25 are coaxial with each other, and they are coupled via a torsion spring 27.

The reduction gear ratio of the reduction gear train 24 is set as follows. That is, when the photographing optical system 3 is at the extended position, the sub photographing optical system 26 is placed at the insertion position (illustrated by a solid line) in the photographing light flux, and when the photographing optical system 3 is displaced to the extended position, the sub photographing optical system 26 is moved. 26 is swung to a retracted position (illustrated by a chain double-dashed line) retracted from the photographing light flux.

The sub-photographing optical system 26 constitutes the photographing optical system 3 at the extended position and the composite optical system to change the focal length to the telephoto region. FIG. 6 shows a motor control circuit which is an electrical component of the optical system driving means of this embodiment. In the figure, the motor 12 is driven by three power supply paths.

The first path is the positive pole of the power source E-the switch S.
w3-switch Sw7a-motor 12-switch Sw7
b-The path of the negative electrode of the power supply E. When power is supplied through this path, the motor 12 rotates to displace the photographing optical system 3 to the retracted position and the sub photographing optical system 26 to the retracted position. The second path is the positive electrode of the power source E-the switch Sw4-the switch Sw8a-the motor 12-the switch S.
w8b-A negative electrode path of the power supply E. By supplying power through this path, the motor 12 rotates in the direction opposite to that in the case of the first path to displace the photographing optical system 3 to the feeding position and the sub photographing optical system 26 to the insertion position. .

Here, the switches Sw7a, Sw7b, Sw.
8a and Sw8b are logic circuits 40 (shown in FIG. 7) described later.
It is a semiconductor switch whose opening and closing is controlled by. The third path is a path connecting the automatic focus adjustment / shutter control circuit 30 and the motor 12, and the output of this control circuit causes the motor 12 to rotate in the forward and reverse directions to move the photographing optical system back and forth in the optical axis direction. Focus on.

Switches Sw1a and Sw5 connected in series are inserted in the power supply path of the control circuit 30. The switch Sw1a is a semiconductor switch controlled by the switch Sw1 and opened and closed in the same phase as the switch Sw1.
It is turned on only when the dustproof cover 2 is at the fully open position. The switch Sw5 is turned on only when the photographing optical system 3 is in the extended position and the retracted position (when the sub photographing optical system 26 is in the retracted position and the inserted position). These prevent shutter release when the dust-proof cover 2 and the photographing optical systems 3 and 26 are in positions unsuitable for photographing.

FIG. 7 shows a logic circuit 40 which controls the operation of the motor control circuit of FIG. This logic circuit 40
Is a pair of input terminals 40a, 40b and a pair of output terminals 4
0c and 40d. The input terminal 40a is between the switch Sw1 and the ground resistance, the input terminal 40b is between the switch Sw2 and the ground resistance, the output terminal 40c is the control terminal of the switches Sw7a and Sw7b, and the output terminal 40d is the switch Sw8a, 8b are respectively connected to the control terminals. The input terminal 40a is a switch Sw.
When the switch 1 is ON, that is, when the dustproof cover 2 is in the fully open position, the level is High, and when the switch Sw1 is OFF, that is, when the dustproof cover 2 is in the fully closed position, the level is Low. The switch Sw2 is turned on for the input terminal 40b.
, That is, when the focal length selection member 4 is in the telephoto position, the level becomes High, and when the switch Sw2 is OFF,
That is, when the focal length selection member 4 is at the wide angle position, Low
It becomes a level. The output terminal 40c turns on both the switches Sw7a and Sw7b when it is at the high level, and turns off both when it is at the low level. Output terminal 40d is High
At the time of level, both switches Sw8a and Sw8b are turned on.
And turn off both at Low level.

The input terminal 40a of the logic circuit 40 is connected to one input terminal of the exclusive OR circuit 40e and one input terminal of the NOR circuit 40f. The input terminal 40b is connected to the other input terminal of the exclusive OR circuit 40e and the other input terminal of the NOR circuit 40f. The output terminals of both circuits 40e and 40f are connected to both input terminals of the OR circuit 40g, respectively. The output terminal of the OR circuit 40g is the output terminal 40c of the logic circuit 40.
Is connected to the input terminal of the inverter 40h, and the output terminal of the inverter 40h is the output terminal 40d of the logic circuit 40.
It is connected to the.

Next, the operation of this embodiment will be described with reference to Table 1. Table 1 shows the position of the dustproof cover 2 and the focal length selection member 4.
Position, switch S, which switches according to these positions
The states of w1 and Sw2, the input terminal 40a of the logic circuit 40,
40b, output terminals 40c and 40d level, switch S
The relationships among the states of w7a, Sw7b, Sw8a, and Sw8b and the position of the taking lens 3 are summarized.

[0030]

[Table 1]

[1] As shown in FIG. 1, when the dustproof cover 2 is at the fully open position, the focal length selecting member 4 is at the telephoto position, and the photographic optical system 3 is already at the extended position, the switches Sw1 and S are set.
Since both w2 are in the ON state, the input terminals 40a and 40b of the logic circuit 40 are both at the high level. The output terminals of the exclusive OR circuit 40e and the NOR circuit 40f are at Low level, and the output terminal of the OR circuit 40g is also at Low level.
It becomes a level. Output terminals 40c and 40d of the logic circuit 40
Are Low and High levels, respectively. As a result,
The switches Sw7a and Sw7b shown in are turned off, and the switches Sw8a and Sw8b are turned on. Shooting optical system 3
Is in the feeding position, the switch Sw cannot be used as shown in FIG.
3, Sw4, and Sw5 are in ON, OFF, and ON states, respectively. Since the switches Sw7a and Sw7b are OFF, the first path is not formed, and since the switch Sw4 is OFF, the second path is not formed. Therefore, the photographing optical system 3 is stationary at the extended position, and the sub-photographing optical system 26 is stationary at the insertion position.
Its focal length is in the telephoto range. Also, switch Sw1
Since a and Sw5 are both ON, the automatic focus adjustment / shutter control circuit 30 is in an operable state, and shooting with the telephoto optical system is possible. FIG. 1 shows the state at this time. [2] When the focal length selection member 4 is switched to the wide-angle position from the state shown in FIG. 1, the switch Sw2 is turned off and the input terminal 40b of the logic circuit 40 is set to the Low level. The output terminal of the exclusive OR circuit 40e is Hig.
Since it becomes the h level, the output terminal of the OR circuit 40g is Hig.
It is inverted to the h level and output terminals 40c, 4 of the logic circuit 40
0d is inverted to High and Low levels, respectively. As a result, the switches Sw7a and Sw7b shown in FIG. 6 are turned on, and the switches Sw8a and Sw8b are turned off. Since the photographing optical system 3 is in the extended position, the switches Sw3 to Sw5 are in the ON, OFF, and ON states, respectively, as shown in FIG. Since the switches Sw7a and Sw7b are ON, the first path is formed and the motor 12 is activated. Therefore, the photographing optical system 3 starts to move from the feeding position toward the feeding position, and the sub-photographing optical system 26 starts to move toward the retracted position. When the photographing optical system 3 reaches the retracted position, the switches Sw3 to Sw5 shown in FIG.
FF, ON, ON state. Switch Sw3 is OF
When it reaches F, the first path is cut off, and the power supply to the motor 12 is stopped. Therefore, the photographing optical system 3 is in the retracted position,
Since the sub-photographing optical system 26 stands still at the retracted position,
The photographic optical system is composed of only the photographic optical system 3, and its focal length is in a wide-angle region. Also, switches Sw1a and Sw5
Since both are ON, the automatic focus adjustment / shutter control circuit 30 is in an operable state and the wide-angle optical system is capable of photographing. FIG. 2 shows the state at this time. [3] When the dustproof cover 2 is displaced from the fully open position to the fully closed position from the state shown in FIG. 1, the switch Sw1 turns off.
F, and the input terminal 40a of the logic circuit 40 becomes Low level. The output terminal of the exclusive OR circuit 40e becomes High level. The subsequent operation is the same as in [2]. Even though the focal length selection member 4 is at the telephoto position, the photographing optical system 3 is displaced from the extended position toward the retracted position, and the sub-photographing optical system 26 is moved to the insertion position. Is displaced toward the retracted position. Therefore, the dust cover 2 can be displaced to the fully closed position. When the dust-proof cover 2 reaches the fully closed position, the switch Sw1a having the same phase as the switch Sw1 is turned off, so that the power supply to the automatic focus adjustment / shutter control circuit 30 is cut off and the photographing is impossible. FIG. 3 shows the state at this time. [4] When the dust cover 2 is displaced from the state shown in FIG. 2 to the fully closed position, the switch Sw1a in phase with the switch Sw1
Is turned off, the power supply to the automatic focus adjustment / shutter control circuit 30 is cut off, and photographing is impossible. [5] When the focal length selection member 4 is switched from the state shown in FIG. 2 to the telephoto position, the switch Sw2 is turned on, and the input terminals 40a and 40b of the logic circuit 40 are both Hig.
H level. Since the output terminals of the exclusive OR circuit 40e and the NOR circuit 40f both become Low level,
The output terminal of the OR circuit 40g is inverted to Low level, and the output terminals 40c and 40d of the logic circuit 40 are Low and H, respectively.
Reverse to igh level. As a result, the switches Sw7a and Sw7b shown in FIG. 6 are turned off, and the switch Sw8 is turned on.
a and Sw8b are turned on. Since the photographing optical system 3 is in the retracted position, the switches Sw3, Sw4, and Sw5 are in OFF, ON, and ON states, respectively. Switch Sw8
Since a and Sw8b are ON and the switch Sw4 is ON, the second path is formed and the motor 12 is started. Therefore, the photographic optical system 3 begins to displace from the retracted position toward the retracted position, and the sub-imaging optical system 26 begins to displace toward the inserted position. When the photographing optical system 3 reaches the extended position, the switches Sw3, Sw4, Sw5 are set as shown in FIG.
Are in the ON, OFF, and ON states, respectively. When the switch Sw4 is turned off, the second path is cut off,
The power supply to the motor 12 is stopped. Therefore, as shown in FIG. 1, the photographing optical system 3 is stationary at the extended position and the sub-photographing optical system 26 is stationary at the insertion position to form a composite optical system, the focal length of which is in the telephoto range. Also, switch Sw1
Since a and Sw5 are both ON, the automatic focus adjustment / shutter control circuit 30 is in an operable state, and shooting with the telephoto optical system is possible. [6] When the dust cover 2 is displaced from the state shown in FIG. 3 toward the fully open position, the switch Sw1 is turned on, and the input terminals 40a and 40b of the logic circuit 40 are both Hig.
H level. The following is the same operation as described in [5].

In the above embodiment, the photographing optical system 3 is set to the retracted position when the dust cover 2 is at the fully closed position. However, the size of the camera is made smaller when the dust cover is closed. In addition, the photographing optical system can be displaced to a position further retracted than the retracted position, and the photographing optical system is displaced to this further retracted position in conjunction with the operation of displacing the dustproof cover to the fully closed position. You may do it.

In the present specification, the optical action of the photographic optical system means that the change causes a visual change on the photographic screen. In both of the above-mentioned embodiments, the focal length is given as the optical action and it is changed in two steps of telephoto and wide-angle. The mode of change of the optical action may be stepwise or continuous, which is achieved by stepwise or continuous feeding / retracting of the optical system.

In the above embodiment, the focal length selecting member 4 as the optical action selecting means and the two operating states of the telephoto position and the wide angle position can be taken, but the present invention is not limited to this. When the optical action of the photographing optical system changes to two or more states, the number of operating states also increases according to the number. For example, when the optical action continuously changes, the operating state of the operating means may be continuously switched.

[0035]

According to the camera with the dustproof cover of the first aspect of the invention, since the projection amount of the dustproof cover is made smaller than the projection amount of the photographing optical system at the feeding position, excellent portability can be realized. When the dustproof cover is moved toward the fully open position, the photographing optical system is electrically driven to the extended position, and when the dustproof cover is moved toward the fully closed position, the photographing optical system is electrically driven to the retracted position. Since it is configured, a camera with good operability can be provided. Furthermore, since the dust-proof cover itself has a function as an operation member for electrically driving the photographing optical system, the structure is simplified and the production cost can be kept low.

According to the camera with the dustproof cover of the third aspect, in addition to the effect of the first aspect, the drive control of the photographing optical system and the photographing prohibition control are performed by using the same dustproof position detecting means. When the dust cover is located outside the fully open position, the shooting optical system is not only moved to the retracted position but also shooting is prohibited, so the dust cover is in a halfway position. Thus, for example, it is possible to prevent shooting in a state where the dustproof cover is in contact with the shooting optical system and adversely affects the optical performance, and it can be realized with a simple configuration.

Further, according to the camera with the dustproof cover of the fourth aspect, in addition to the effects of the first and third aspects, the photographing optical system position detecting means is added so that the dustproof cover is at the fully open position. Also, since the photographing is prohibited so long as the photographing optical system is at the intermediate position where the photographing optical system does not reach the extended position, it is possible to prevent photographing in a state where good photographing cannot be obtained by the photographing optical system.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a plan view when a dust cover 2 is at a fully open position.

FIG. 2 is a view showing an embodiment of the present invention and is a plan view when the dustproof cover 2 is at the fully open position.

FIG. 3 is a view showing an embodiment of the present invention and is a plan view when the dust cover 2 is at the fully closed position.

FIG. 4 is a perspective view of a displacement mechanism of a photographing optical system according to an embodiment of the present invention.

FIG. 5 is a front view showing an attachment / detachment mechanism of a sub-photographing optical system according to an embodiment of the present invention.

FIG. 6 is a control circuit diagram of a photographing optical system displacement motor according to an embodiment of the present invention.

7 is a logic circuit diagram for controlling the operation of the motor control circuit shown in FIG.

[Explanation of symbols for main parts]

 1 Camera body 2 Dust cover 3, 26 Shooting optical system

Claims (4)

[Claims] 1. A dustproof cover movably provided along the front face of a camera and movable between a fully open position and a fully closed position by direct manual operation, and the dustproof cover. Shooting optics that can be moved to a feeding position that is extended from the dust cover when the dust cover is in the fully open position, and a retract position that is extended from the dust cover when the dust cover is in the fully closed position. A system and the dust cover is moved from the fully closed position to the fully open position by retracting from the front of the photographing optical system at the retracted position, and then an open signal is generated, and the dust cover is at the fully open position. To the fully closed position, the dust-proof cover position detecting means generates a closing signal before coming into contact with the photographing optical system at the feeding position, and the image-taking operation in response to the dust-proof cover position detecting means. A photographing optical system driving means for electrically driving an optical system between the feeding position and the feeding position, wherein the photographing optical system driving means moves the photographing optical system into the feeding state when receiving the open signal. From the position to the feeding position, thereby enabling photographing by the photographing optical system in the feeding position, and when receiving the closing signal, moving the photographing optical system from the feeding position to the feeding position, The camera with a dustproof cover is characterized in that it is possible to move the dustproof cover to the fully closed position by the manual operation. 2. The dustproof cover position detecting means generates the open signal when the dustproof cover is at the fully open position, and generates the close signal when the dustproof cover is not at the fully open position. A camera with a dust-proof cover according to item 1. 3. A dustproof cover movably provided along the front face of the camera and movable between a fully open position and a fully closed position by direct manual operation, and the dustproof cover. A taking optical system that is movable to a feeding position that is taken out from the dust cover when it is in the fully open position and to a feeding position that is taken from the dust cover when the dust cover is in the fully open position. And a dust-proof cover position detecting means for generating an open signal when the dust-proof cover is in the fully open position and a close signal when the dust-proof cover is not in the fully open position, and the photographing in response to the dust-proof cover position detecting means. Photographing optical system driving means for electrically driving an optical system between the feeding position and the feeding position, and photographing prohibiting means for controlling the photographing prohibition of the camera in response to the dust cover position detecting means. The photographing optical system driving means, when receiving the closing signal, moves the photographing optical system from the feeding position to the feeding position, whereby the dust cover is fully closed by the manual operation. When the open signal is received, the photographing optical system is moved from the feeding position to the feeding position, thereby enabling photographing by the photographing optical system in the feeding position. A camera with a dust-proof cover, wherein the prohibiting means prohibits the photographing when the closing signal is received. 4. A dust-proof cover movably provided along the front face of a camera and movable between a fully open position and a fully closed position by direct manual operation, and the dust-proof cover. A taking optical system that is movable to a feeding position that is taken out from the dust cover when it is in the fully open position and to a feeding position that is taken from the dust cover when the dust cover is in the fully open position. And a dust-proof cover position detecting unit that generates an open signal when the dust-proof cover is in the fully open position and a close signal when the dust-proof cover is not in the fully open position, and when the photographing optical system is in the extended position. An image pickup optical system position detecting means for generating a feed signal, a feed signal when the feed position is located, and an intermediate signal when the feed position is between the feed position and the dust cover. A photographing optical system driving means for electrically driving the photographing optical system between the feeding position and the feeding position in response to the position detecting means and the photographing optical system position detecting means; and the dust cover position detecting means. Image pickup optical system position detection means and image pickup prohibition means for controlling the prohibition of image pickup of the camera, and the image pickup optical system drive means, when receiving the close signal, extends the image pickup optical system. It is possible to start the transfer movement from the position to the transfer position, and stop the transfer movement when receiving the transfer signal, thereby moving the dust cover to the fully closed position by the manual operation. When receiving the open signal, the feeding movement of the photographing optical system from the feeding position to the feeding position is started, and when the feeding signal is received, the feeding movement is stopped. Capturing with an image capturing optical system is possible, and the capturing prohibiting means prohibits the capturing when either the closed signal or the intermediate signal is received, and when both the open signal and the feed-out signal are received, the capturing is stopped. A camera with a dustproof cover, which is characterized by lifting the prohibition.