JP3427126B2 - camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel for holding a taking lens and a camera provided with a lens protection barrier (hereinafter, simply referred to as a lens barrier) which is opened and closed on the front side of the lens barrel, and more particularly to a main power supply. When the switch remains ON, the lens barrel and lens barrier are set to the non-shooting state when the film chamber opening / closing lid is opened, and the shooting preparation state is set when the opening / closing lid is closed. Can be related to the camera.

[0002]

2. Description of the Related Art For example, in a compact camera incorporating a zoom lens as a photographing lens, a zoom type lens barrel for holding a zoom lens when the back cover of the camera is opened to take out a filmed film cartridge after the photographing is finished. In order to protect the lens barrel, the lens barrel is retracted by retracting it inside the camera body, and the lens barrier for zoom lens protection that covers the front end side of the lens barrel is closed and the main power switch of the camera is turned off. This has been generally done in the past.

That is, this type of camera is provided with means for detecting the open / closed state of the back lid for opening / closing the film chamber, and when the detection means detects that the back lid has been opened, the lens barrel. And the lens barrier is closed by operating the means for opening and closing the lens barrier, and the main power switch of the camera is turned off.

[0004]

In the camera having the above-mentioned structure, even if the main power switch is ON, the main power switch is switched according to the opening operation signal when the back cover is opened. Therefore, it was necessary to turn off the main power supply.

In such a conventional camera, the main power supply switch is a self-reset type switch, and a structure in which the main power supply is turned on and off depending on the order of input signals is adopted.

However, according to the camera having such a structure, when the film cartridge which has been photographed is taken out, a new film is loaded, and the back lid is closed to perform photographing, the main power source is detected by the back lid opening / closing detecting means. Since it is turned off by the signal, it is necessary to re-operate the above-mentioned self-recovery type main power switch to turn it on, which avoids complexity in terms of operability when preparing for shooting. I couldn't do it.

Further, according to the above-described camera having the conventional structure, the lens barrel is retracted to the non-photographing position and the lens barrier is closed by the opening operation signal from the back cover opening / closing detecting means. It is also necessary to extend the lens barrel to the shooting preparation position with the lens barrier closed, and to return the lens barrier to the original open state for shooting by the closing operation signal of the opening / closing lid.
It is necessary to consider such points.

The present invention has been made in view of the above circumstances, and when a film patrone that has been photographed is to be replaced, a lens mirror is detected by a signal from a lid opening / closing detection means of the patrone chamber opening / closing lid of the camera body. Retracting the cylinder, closing the lens barrier, turning off the main power switch
When the main power switch is in the ON state when switching to the state, it is necessary to obtain a camera that can return each part of the camera to the shooting ready state by replacing the cartridge and closing the opening / closing lid. Has an aim.

[0009]

In order to meet such a demand, the camera according to the present invention has the main power source of the camera body turned on.
A main power switch having an N position and an OFF position, a lid opening / closing detection means for detecting an open / closed state of the film chamber opening / closing lid of the camera body, and a photography lens which is opened / closed to cover the front side of the photography lens. And a lens barrier for controlling the camera, wherein the lens barrier is opened when the main power switch is in the ON position , and the lens barrier is closed when the main power switch is in the OFF position . When the lid opening / closing detection means detects that the opening / closing lid is in the open state, the lens barrier is closed.
When the lid opening / closing detection means detects that the opening / closing lid is in the closed state , and when the main power switch is in the ON position, the lens barrier is opened to cause the lid opening / closing detection means to operate.
It detects that the open / close lid is closed, and
When the power switch is in the OFF position, remove the lens barrier
It is characterized in that means for keeping the closed state is provided.

Further, the camera according to the present invention has a main power switch having a position for turning on and off a main power source of the camera body, and a lid opening / closing detection for detecting an open / closed state of the film chamber opening / closing lid of the camera body. and means, and is movable in an optical axis direction in the lens barrel, the main power switch is oN
When in the position, the lens barrel is extended, and when the main power switch is in the OFF position , the lens barrel is in the extended position.
In the camera that is in the collapsed state ,
When the open / close lid is detected to be in the open state, the lens barrel is retracted , the cover open / close detecting means detects that the open / close lid is in the closed state, and
When the switch is in the ON position, extend the lens barrel
Then, the lid opening / closing detection means closed the opening / closing lid.
That the main power switch is in the OFF position.
In this case, a means for keeping the lens barrel in the collapsed state is provided.

The camera according to the present invention is characterized in that, in claim 1 or 2, the main power supply switch is a state detection switch for detecting an ON position and an OFF position of the main power supply.

[0012]

According to the present invention, for example, when the opening / closing lid of the film chamber is opened for film exchange and the state is detected by the lid opening / closing detecting means, the lens barrier for protecting the taking lens is closed and When the main power switch is in the ON state at the time of detecting the opening operation by the lid opening / closing detecting means and the closing of the opening / closing lid is detected by the lid opening / closing detecting means, the lens barrier is opened. That is, when the main power switch is in the ON state, the lens barrier that has been closed once is opened by opening the opening / closing lid, closing the opening / closing lid after replacing the film, and opening the opening / closing lid. Becomes

Further, according to the present invention, when the lid opening / closing detecting means detects that the opening / closing lid of the film chamber is opened, for example, for film exchange, the lens barrel is set to the non-photographing state, and the above-mentioned operation is performed. When the main power switch is in the ON state at the time of detecting the opening operation by the lid opening / closing detecting means and the closing of the opening / closing lid is detected by the lid opening / closing detecting means, the lens barrel is operated to the photographing preparation state. That is, if the main power switch is in the ON state,
When the opening / closing lid is opened, the film is exchanged, and then the opening / closing lid is closed, the lens barrel once in the non-photographing state is again in the photographing preparation state, and thus the camera is immediately in the photographing preparation state.

Further, according to the present invention, by using the state detection switch capable of detecting the ON state and the OFF state of the main power source as the main power source switch, the opening / closing lid is closed and the closed state is detected by the lid opening / closing detecting means. By doing so, the lens barrier and the lens barrel can be returned to the state when the main power supply was in the ON state, and the camera can be immediately set to the shooting preparation state.

[0015]

1 to 9 show an embodiment of a camera according to the present invention. In these drawings, the present invention is applied to a zoom type compact camera. A schematic configuration of the zooming mechanism of the taking lens in such a compact camera will be briefly described below with reference to FIGS. 8 and 9.

In the figure, reference numeral 1 is a front lens group, 2 is a rear lens group, and these constitute a zoom lens. 3 is a front lens group holding cylinder, 3a is a focusing helicoid carved on the outer peripheral side of the holding cylinder 3, 4 is a focusing pin implanted in the holding cylinder 3, 5 is a shutter / focusing drive device, and 5a is The helicoid is fixed to the inner circumference of the shutter / focusing drive unit 5 and meshes with the focusing helicoid 3a.

Reference numeral 6 denotes a focusing lever driven by the shutter focusing device 5, which moves the front lens group 1 in the optical axis direction by a rotating helicoid screw (not shown) via an engaged focusing pin 4. Focusing is performed. Then, a focusing mechanism is configured by these respective elements. A shutter blade 7 also serves as a diaphragm.

Reference numeral 8 is a rear lens group holding cylinder, and 8a is a pin implanted in the holding cylinder 8. Further, 9 is a guide tube of the rear lens group holding tube 8 in which a pin 8a is inserted in a rectilinear groove 9a so that the pin 8a can be moved rectilinearly in the optical axis direction. Further, 9b is a helicoid carved on the outer peripheral side of the guide cylinder 9, 10 is a cam ring rotatably provided on the guide cylinder 9, and a cam groove 10a engaging with the pin 8a is provided around the cam ring.

Further, the pin 10a planted in the cam ring 10 has one end fixed to the fixed barrel 13 on the camera body side by a screw or the like, and the cam groove of the linear guide plate 11 extending in the optical axis direction. 11a (see FIGS. 4 and 5) is inserted and engaged. Then, the side part 11 of the straight guide plate 11
The rotation of the guide cylinder 9 is prevented by the engagement of b with the protrusion 9c of the guide cylinder 9.

Reference numeral 12 is an intermediate helicoid, which is a fixed cylinder 13.
A helicoid portion 12b that meshes with the helicoid 13a of
Helicoid 12 that meshes with helicoid 9b of guide tube 9
a and a gear portion 12c that meshes with a transmission gear 14 that transmits a driving force from an electric drive portion (not shown). The guide tube 9 is prevented from rotating by the rectilinear guide plate 11 in response to the rotation of the intermediate helicoid 12 in both the forward and reverse directions, so that the guide cylinder 9 moves rectilinearly and reciprocally along the optical axis direction. Since the cam groove 10a of 10 moves along the cam groove 11a of the linear guide plate 11, the cam ring 10 rotates around the optical axis, and the distance between the rear lens group 2 and the front lens group 1 can be changed. , Together with the front lens group 1, moves with respect to the film surface and performs a zooming operation.

Here, in a part of the intermediate helicoid 12,
The encoder board 15 for position detection is fixed, and the encoder brush 16 provided on the fixed cylinder 13 side slides on the conductive pattern of the board 15 when the focal length is changed.

Therefore, according to this structure, the helicoid 13a of the fixed cylinder 13, the helicoids 12a and 12b of the intermediate helicoid 12 and the helicoid 9b of the guide cylinder 9 form a double helicoid, and the linear guide plate 11 is formed. The rotation of the guide cylinder 9 is prevented by, and the lens groups 1 and 2 are moved by the rotational force from an electric drive unit (not shown) to perform zooming.

FIG. 9 is a developed view of the encoder board 15. In the figure, the switching portions of the conductive pattern 15a, in other words, the pattern switching positions where the position signal obtained from the brush 16 changes are denoted by a1, a2 ,.
..., represented by a9. The focal lengths of the taking lens corresponding to the switching positions are f1, f2, ...
..., f9,

[0024]

[Equation 1]

As described above, the respective switching positions a1 to a1 are set so that the ratio of two adjacent focal lengths becomes substantially constant.
9 has been set. Since the photographing magnification is substantially inversely proportional to the focal length, the change in the photographing magnification at the two adjacent positions of the switching positions a1 to a9 is equal at any position.

However, the switching position a9 is the W side (wide side) end of the zoom lens, and the power switch SW1
Becomes "L", the zoom lens barrel is extended and stopped only from the current brush position a10 to a9. This state is the shooting preparation position of the zoom lens barrel. Thereafter, a9 to a1 are regions where the W-side and T-side (tele-side) zoom switches SW2 and SW3 (see FIG. 1 and FIG. 2) are sequentially extended and extended.

Here, in the zoom type lens barrel of the camera having the above-described structure, the state of preparation for photographing in which the lens barrel is extended to the brush position a9 in FIG. 9 is shown in FIG. 4, and the lens barrel is a10 in FIG. FIG. 5 shows a non-imaging state in which the brush is retracted to the brush position. In these figures, the front and rear lens groups 1 and 2 and the holding cylinders 3 and 8 thereof in FIG. 8 described above are omitted.

4 to 7, reference numeral 50 is a straight-moving lens barrel fixed to the front end side of the guide barrel 9 by a screw 52, and 60 is a lens barrier attached to the front end portion of the straight-moving lens barrel 50. . 6 is a front view showing the front end side of the rectilinear lens barrel 50, and FIG. 7 is a front view showing a non-shooting state in which the lens barrier 60 is closed.

In these figures, the lens barrier 60
Is pivotably supported by a pivot shaft 51 that is planted on the front end surface of the rectilinear lens barrel 50. A closing spring 52 wound around the pivot 51 urges the closing spring 52 in the counterclockwise direction in FIG. A small cylindrical protrusion 62 is formed at the base end of the lens barrier 60.

Further, an interlocking ring 70, which serves as an interlocking member together with the lens barrier 60, is attached to the rectilinear lens barrel 50 so as to be rotatable around the optical axis as a center axis.
The interlocking ring 70 is biased in the counterclockwise direction in FIG. 6 by the opening spring 53 stretched between and.

Further, when the interlocking ring 70 is rotated counterclockwise in the figure by the opening spring 53, the outer peripheral edge of the interlocking ring 70 is
A pushing protrusion 72 for pushing the small cylindrical protrusion 62 of the lens barrier 60 so as to swing the lens barrier 60 in the clockwise direction in the drawing against the biasing force of the closing spring 52 to open the lens barrier 60.
Are formed.

Further, a flange portion 73 bent toward the inside of the rectilinear lens barrel 50 is provided on the outer peripheral edge of the interlocking ring 70, and the tip end portion of the flange portion 73 is shown in FIGS.
As is apparent from the above, the interlocking pin 74 is planted so as to face the front end portion of the linear guide plate 11.

On the other hand, a cam portion 25 engageable with the interlocking pin 74 is formed at the front end portion of the rectilinear guide plate 11 so that the interlocking ring 70 rotates in response to the rectilinear reciprocating movement of the rectilinear lens barrel 50. There is. The cam portion 25 has an inclined surface 26 on which the interlocking pin 74 is pushed in the circumferential direction with respect to the rectilinear guide plate 11 and a parallel surface 27 parallel to the optical axis that moves along the optical axis direction. There is.

In such a configuration, FIG. 4 and FIG.
In the shooting preparation state shown in FIG.
4 is not in contact with the cam portion 25 of the straight guide plate 11,
The pushing projection 72 of the interlocking member 70 is urged by the opening spring 53 to resist the urging force of the closing spring 52 and the lens barrier 60.
The small cylindrical protrusion 62 is pushed in, and the lens barrier 60 is in an open state.

In this state, when the operating member (not shown) is switched to the non-photographing state, the drive source such as a motor (not shown) also rotates, which causes the transmission gear 1 shown in FIG.
The rotation transmission from 4 causes the intermediate helicoid 12 to rotate via the gear portion 12c.

The guide cylinder 9 screwed to the intermediate helicoid 12 via the male helicoid 9b is a straight guide plate 11.
Since the rotation is blocked by the engagement of the side portion 11b of the projection 9c with the side portion 11b, the rotation of the intermediate helicoid 12 follows the lead of the male helicoid 9b from the position in the shooting ready state shown in FIG. Along the direction of arrow A1 in FIG.

By the movement of the guide cylinder 9 in the direction of arrow A1, the rectilinear lens barrel 50 and the interlocking ring 70 mounted on the rectilinear lens barrel 50 also move in the A1 direction, and eventually the interlocking ring 7 is moved.
The 0 interlocking pin 74 and the inclined surface 26 of the cam portion 25 formed on the straight guide plate 11 are brought into contact with each other.

Further, when the intermediate helicoid 12 rotates and the guide cylinder 9 moves in the direction of arrow A1 in the figure, the interlocking pin 74 of the interlocking ring 70 moves along the inclined surface 26 of the cam portion 25. As a result, the interlocking ring 70 rotates clockwise in FIG. 6 against the urging force of the opening spring 53, and the interlocking pin 74 of the interlocking ring 70 pushes the lens barrier 6 until then.
It retreats from the small cylindrical protrusion 62 of 0.

When the interlocking pin 74 of the interlocking ring 70 retracts from the small cylindrical protrusion 62 of the lens barrier 60 in this way,
Since the lens barrier 60 is not blocked by the interlocking pin 74, the lens barrier 60 swings clockwise in FIG. 6 due to the urging force of the closing spring 52 to be in the closed state shown in FIG. 7.

When the back cover open state of the lens barrier 60 closed as described above is detected, the lens barrel changes from the non-shooting state shown in FIGS. 5 and 7 to the shooting ready state. Will be operated. That is,
By rotating the intermediate helicoid 12 in the opposite direction to the above case by a drive source such as an electric motor (not shown),
The guide cylinder 9 is moved in the direction of arrow A2 in FIG.

As a result, the interlocking pin 74 of the interlocking ring 70 is
Moves in the direction of arrow A2 in the figure along the parallel surface 27 of the cam portion 25.

Further, when the guide cylinder 9 moves in the direction of arrow A2 in FIG.
When the interlocking pin 74 moves while coming in contact with the inclined surface 26 and coming into contact with the inclined surface 26, the interlocking ring 70 is rotated counterclockwise in FIG. 7 by the biasing force of the opening spring 53. , The pushing protrusion 72 of the interlocking ring 70 in the retracted position is the small cylindrical protrusion 62 of the lens barrier 60.
And gradually pushes in the small cylindrical projection 62. As a result, the lens barrier 60 swings in the clockwise direction in FIG. 7 about the pivot 51, and becomes the open state shown in FIG.

In the camera having the zooming mechanism of the photographing lens having the above-described structure, the photographing operation, the zooming operation of the zoom type lens barrel (the rectilinear lens barrel 50) and the opening / closing operation of the lens barrier 60 are performed as shown in FIG. The control circuit and control flow chart shown in FIG.

To briefly explain this, the control circuit in the camera according to the present invention, as shown in FIG.
1, a film sensitivity detection circuit 82, a film feed signal detection means 83, and an encoder 8 for detecting the positions of the rectilinear lens barrel 50.
4 (15, 16), provided with a CPU 80 which receives signals from the zooming command section 85 and the like and performs various arithmetic processing,
The output signal from the CPU 80 is the motor drive circuit 86.
The electric motor 87 for controlling the lens barrel and the electric motor 88 for feeding the film for controlling the zooming operation of the rectilinear lens barrel 50 and the opening / closing operation of the lens barrier 60 are controlled. .

In FIG. 1, reference numeral 89 is the CPU 8
A diaphragm / shutter control circuit for receiving a control signal from 0, 9
0 is a diaphragm, and 91 is a shutter, by which the photographing operation of the camera is performed as well known.

Further, in FIG. 1, SW1 is a main power switch, SW2 is a W side zoom switch, SW3 is a T side zoom switch, and SW4 is a lid opening / closing detection switch for detecting the opening / closing operation of the back lid.

FIG. 2 is a schematic diagram for explaining the relationship between the back cover 95 and the switches of various parts of the camera when the back cover 95 is opened / closed on the back side of the camera body 94 in the camera having the above-described structure. That is, FIG. 7A shows a state in which the main power switch SW1 is in the OFF state, and the rectilinear lens barrel 50, which is the portion that serves as the lens barrel, is retracted into the fixed barrel 13 on the camera body 94 side. There is. At this time, brush 1
No. 6 is in the state of a10 as shown in FIG.

Further, FIG. 9B shows the main power switch SW1.
When turned on, the rectilinear lens barrel 50 is projected from the fixed barrel 13 on the camera body 94 side. At this time, the brush 16 is at the position a9 in FIG. 9, which corresponds to FIG. 4 and FIG. As is apparent from No. 6, the camera is in a state capable of photographing.

Further, FIG. 6C shows the main power switch SW.
Although the back cover 95 is opened even though 1 is ON, the cover opening / closing detection switch SW4 is set to "L" at this time, so that the straight-moving lens barrel 50 is fixed by the control operation described above. It moves into 13. At this time, the brush 16 is at the position a10 in FIG.

In this state, when the back lid 95 is closed and the lid opening / closing detection switch SW4 is set to "H", the rectilinear lens barrel 50 is again moved in the extending direction to the position a9. Then, the camera is ready for shooting.

In this way, the main power switch SW1 is turned on.
After replacing the film, the back cover 9
When the lid opening / closing detection switch SW4 becomes "H" by closing 5, the lens barrier 60 is opened and, as shown in (b) of FIG. It projects from the camera body 94 side.

FIG. 3 is a flow chart showing the operation of the entire camera including the above-mentioned opening / closing control of the lens barrier 60, the extension of the rectilinear lens barrel 50 (lens barrel), and the retraction operation.

To briefly explain this, step 101
Then, it is determined whether or not the position of the straight lens barrel 50 corresponding to the brush 16 has moved from a10 to a9, and if not, the process proceeds to step 102. The flag F is “F = 0” when the lens barrel is not moving,
When moving, it is set to "F = 1". Further, a10 is a non-photographing position and a9 is a photographing preparation position, and it is determined which position the lens barrel 50 is in.

At step 102, the main power switch SW
It is determined whether 1 is ON, that is, in the "L" state. If it is ON, the storage means for SW1 (in the CPU 80) is set to "G = 1" in step 103. If the main power switch SW1 is off, step 1
In 04, the storage means is set to "G = 0", and the step 1
Return to 02.

In step 105, it is detected whether the open / close detection switch SW4 of the back cover 95 is "H", that is, whether the back cover 95 is closed. If it is closed, the process goes to step 106. Then, "F = 0", that is, it is determined whether the lens barrel 50 is in the non-photographing position or in the photographing preparation state.

If it is in the non-photographing position, the motor is normally rotated, the lens barrel position "a9" is confirmed, the motor is stopped, and "F = 1" is changed in steps 107 to 110, and the process proceeds to step 111. In step 106, F = 1
And when the camera is ready for shooting, step 1
Proceed to 11.

At step 111, when the release switch SW5 is turned on and becomes "L", it is confirmed whether or not the photometry, distance measurement, focusing, exposure, step-by-step winding up to the end of 37-th frame and winding up to the end of 37-th frame are performed at steps 112 to 116. Is performed.

When the film has not reached the end, as in steps 117 to 120, it is determined whether the main power switch SW1 is OFF (whether it is "H"), the motor reverse rotation, the lens barrel position. Is determined to be a10, the motor is stopped, and the process returns to step 102.

When the film reaches the end, as in steps 121 to 123, after the lens barrel driving motor is reversed, it is determined whether the lens barrel position is at a10, and the motor is stopped. The film rewinding operation is performed in the order shown in steps 124 to 126.

Then, in steps 127 and 128, when the back cover open / close detection switch SW4 is turned from OFF to ON and the level of the back cover is changed from "L" to "H", it is detected that the back cover is closed. Is performed, the motor is stopped, and in steps 130 and 131, whether or not the main power switch SW1 before the back cover opening operation is ON, that is, “G =
If it is ON, the process returns to step 106, and if it is OFF, the process ends.

When it is confirmed in step 105 that the back lid open / close detection switch SW4 is in the "L" state in the ON state, the lens barrel is driven from a10 to a9 as shown in steps 140 to 144. "F
= 0 ”, the lens barrel position is determined to be a10, and the process proceeds to step 128. If the lens barrel position is not a10, the lens barrel is moved to a predetermined position and stopped in steps 142 to 144.

In the camera having the above structure, a storage means is provided for storing the ON / OFF state of the main power switch SW1 immediately before the back cover open / close detection switch SW4 detects the open state, and this storage means is the main power switch. SW
In a state in which the ON state of 1 is stored, the lens barrier 60 is configured to be opened when it is detected by the back lid opening / closing detection switch SW4 that the back lid 95 is closed.

According to this structure, when the back cover 95 is opened for film exchange, the state is detected by the detection switch SW4 to close the lens barrier 60 and the detection switch. When the open state is detected by SW4, the main power switch SW1 immediately before the detection
The ON / OFF state of is stored in the storage means in the CPU 80, and when the back cover 95 is closed, the main power switch SW1 is returned to the original state and the lens barrier 60 is opened according to this storage. You can
Therefore, if the main power switch SW1 is ON, the back cover 95 can be opened / closed, and the film can be immediately replaced with the camera to be ready for shooting.

Further, in the above-mentioned structure, the lens barrel is
When the open / close detection switch SW4 of the back lid 95 detects the open state of the lid and closes the lens barrier 60, the back lid 95 is pulled up to the end position (a10 position) in the pulling direction to set the non-shooting state, and After the closing operation of 95, it is configured to extend to the photographing preparation position (a9 position) in the barrier open state.

Therefore, in such a configuration, when the back lid open / close detection switch SW4 detects the open state of the back lid, the rectilinear lens barrel 50 is once terminated in the retracting direction in order to close the lens barrier 60. Even when the back cover 95 is retracted to the non-photographing position, the back cover 95 is closed and then re-extended to the shooting preparation position in the barrier open state. The back cover 95 is closed and the lens barrier 60 is opened. When shooting, it is possible to immediately enter a state in which shooting can be performed.

The present invention is not limited to the structure of the embodiment described above, and it goes without saying that the shape, structure, etc. of each part of the camera can be appropriately modified or changed. It goes without saying that, for example, the structure and means of each part, including the extending and retracting drive structure for zooming and focusing of the lens barrel, may be appropriately changed.

[0067]

As described above, according to the camera of the present invention, the main power switch remains in the ON state,
When the lid opening / closing detection means detects that the opening / closing lid is in the open state, the lens barrier is closed, and the lid opening / closing detection means detects that the opening / closing lid is in the closed state. Since the means for providing the means is provided, for example, when the film chamber opening / closing lid is opened for film exchange, the lens barrier protecting the photographing lens is closed, and when the opening / closing lid is closed, the lens barrier opening operation is performed. Can be made. Therefore, if the main power switch is in the ON state, it is possible to immediately enter the shooting ready state after opening / closing the opening / closing lid and exchanging the film.

Further, according to the camera of the present invention, the lens barrel for holding the taking lens is retracted to the end position in the retracting direction when the opening / closing lid detecting means detects the open state of the opening / closing lid. Since the lid opening / closing detection means detects the closed state of the opening / closing lid to move the lens barrel out to the shooting ready state and operates to operate the camera, when the opening / closing lid is closed, The lens barrel is ready for shooting.

[Brief description of drawings]

FIG. 1 is a block diagram of a main configuration showing an embodiment of a camera according to the present invention.

FIG. 2 shows an embodiment of a camera according to the present invention,
(A), (b), (c) is a schematic explanatory drawing which shows opening / closing operation of an opening / closing lid in order.

FIG. 3 is a flowchart for explaining the operation of each part of the camera including the main power switch, the lens barrel, and the lens barrier in the camera of the present invention.

FIG. 4 is a schematic cross-sectional view showing an embodiment of a camera according to the present invention and showing a state of preparation for photographing in which a lens barrel is extended to a brush position of a9.

FIG. 5 is a schematic cross-sectional view showing an embodiment of a camera according to the present invention and showing a non-imaging state in which a lens barrel is retracted to a brush position of a10.

FIG. 6 is a front view of the rectilinear lens barrel showing a state in which the lens barrier is open and is ready for shooting.

FIG. 7 is a front view seen from the front end side of the rectilinear lens barrel showing a non-imaging state with the lens barrier closed.

FIG. 8 is a cross-sectional view showing a zoom mechanism of a photographing lens in an electric zoom camera that is suitable for applying the present invention.

FIG. 9 is a development view showing a relationship between a conductive pattern of an encoder substrate and an encoder brush that are used when zooming the lens barrel.

[Explanation of symbols]

1 ... Front lens group, 2 ... Rear lens group, 9 ... Guide tube,
10 ... Cam ring, 11 ... Straight guide plate, 12 ... Intermediate helicoid, 13 ... Fixed cylinder, 15 ... Encoder board, 16
... Encoder brush, 25 ... Cam section, 26 ... Slope, 2
7 ... Parallel plane, 50 ... Straight lens barrel (lens barrel movable part), 6
0 ... Lens barrier, 62 ... Small cylindrical protrusion, 70 ... Interlocking ring, 80 ... CPU, 86 ... Motor drive circuit, 87 ... Lens barrel driving electric motor (driving means for lens barrel and lens barrier), 94 ... Camera body, 95 ... Back lid (opening / closing lid), S
W1 ... Main power switch, SW4 ... Back lid open / close detection switch (lid open / close detection means).

Claims (3)

(57) [Claims] 1. A position at which the main power source of the camera body is turned on and O
A main power switch having a FF position, a lid opening / closing detection means for detecting the open / closed state of the film chamber opening / closing lid of the camera body, and a lens barrier opened / closed to cover the front side of the taking lens to protect the taking lens. the provided, when the main power switch is ON position and the lens barrier in the open state, when the main power switch is OFF position the camera to the lens barrier closed, closing cover by the cover opening and closing detecting means Is closed, the lens barrier is closed, the lid opening / closing detection means detects that the opening / closing lid is in the closed state , and the main power switch is in the ON position. The lens barrier is opened, and the lid opening / closing detection means is used.
Detects that the open / close lid is closed, and
When the switch is in the OFF position, the lens barrier is closed.
A camera provided with means for keeping the state . 2. A position at which the main power source of the camera body is turned on and O
A main power switch having a position for flipping, a lid opening / closing detection means for detecting an open / closed state of a film chamber opening / closing lid of the camera body, and a lens barrel movable in an optical axis direction, In the camera in which the lens barrel is extended when it is in the ON position , and the lens barrel is retracted when the main power switch is in the OFF position , the opening / closing lid is opened by the lid opening / closing detection means. When the state is detected, the lens barrel is collapsed , the lid opening / closing detecting means detects that the opening / closing lid is in the closed state, and when the main power switch is in the ON position, the lens is opened.
The lens barrel is extended, and the lid opening / closing detection means opens / closes the lid.
The main power switch is detected.
When the switch is in the OFF position, the lens barrel remains in the retracted state.
A camera provided with a means for keeping . 3. The camera according to claim 1, wherein the main power switch is a state detection switch that detects an ON position and an OFF position of the main power supply.