JPH05303134A - Focal distance switching system camera - Google Patents

Abstract

PURPOSE:To shorten the length of a lens under a state that a lens barrier is closed and to improve the portability of a camera when it is not used by extending the lens to the more back part of an optical axis than a wide-angle end. CONSTITUTION:In the case that a mode is switched to a lock mode from a telephotographing mode or a standard photographing mode, a mode selection lever 7' is fully returned in a left direction being the position of the lock mode by restoring force to the left direction by a mode selection lever spring 6 when the head part of a light emitting device is depressed by a hand and popped down. At this time, a first switch 20' is changed over and a motor 15 is energized. Besides, a movable lens barrel 14 is retreated to a movable lens barrel extending position or a movable lens barrel housing position which is positioned more backward. When the lens barrel 14 arrives at the position, the energizing of the motor 15 is stopped by the changeover of a second switch 21'. Then, it is positioned at this position and collapsibly mounted. Besides, a barrier pin 23a is guided along the inclined surface of a barrier switching can 7d and the lens barrier 23 is closed by covering the front surface of the photographing lens 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a focal length switchable camera, and more particularly to a lens for retracting a lens beyond a wide angle end in response to an operation of a barrier moving member for closing a lens barrier.

[0002]

2. Description of the Related Art Conventionally, most of the focal length switchable cameras in lens shutter cameras are manually switched. In addition, it is known that the camera has a lens barrier that can be opened and closed, but it is necessary to operate this lens barrier and the focal length switching operation of the lens completely separately. In some cases, the lens remained protruding in the telephoto state and remained in a poor portability state.

In particular, since the operation member for switching the focal length of the camera and the operation member for closing the lens barrier to lock the camera in a non-photographable state are separately provided in the camera body, the photographing lens is locked from the camera lock state. When the focal length of the camera is switched, the operator of the camera has to manually operate the operating members provided twice, and the operation of the camera is very troublesome. In addition, if such an operating member is provided separately, it is difficult to perform electrical or mechanical mounting.

[0004]

SUMMARY OF THE INVENTION In view of the above points, the present invention has been made to improve the above-mentioned drawbacks, in which the focal length of the photographing lens of a camera is switched using a motor, and the lock mode is used. Sometimes, the shooting lens is moved further toward the camera body side than the wide-angle end from the shooting side, the lens barrier is closed to lock the camera, and the reverse operation is performed when unlocking the lock state. It is an object of the present invention to provide a focal length switchable camera that can be manually operated by one of the operating members.

[0005]

In a focal length switching type camera, there are a first state in which a lens constituting a photographing optical system is moved to the wide-angle side and a second state in which the lens is moved to the telephoto side. A lens position selection member for selecting any one of the states, detection means for detecting the selection state of the lens position selection member, and selection of the lens position selection member by the detection means being in the first state. When it is detected, the motor is driven to move the lens to the wide-angle side, and when the detection means detects that the selection of the lens position selection member is in the second state, First motor control means for driving a motor to move the lens to the telescope, a closed position that covers the front of the optical axis of the lens, and an open position that retracts from the front of the optical axis of the main lens. Lens barrier, a barrier moving member that moves the lens barrier to any one of the closed position and the open position, and when the barrier moving member is operated to move the lens barrier to the closed position. Second motor control means for driving the motor to move the lens further rearward of the optical axis than the wide-angle end is provided.

[0006]

[Function] The motor is controlled so that the lens barrier moving member is manually operated to close the lens barrier, and the output thereof causes the lens constituting the photographing optical system to move further to the optical axis rearward than the wide-angle end. To do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the embodiments of the present invention, a camera according to the present invention will be described as a premise.

FIG. 1 is an external view of a camera according to the present invention, and FIG.
FIG. 3 is an explanatory diagram of the camera in a locked state where shooting is not possible, and FIG. 3 is an explanatory diagram of the camera when the shooting lens is extended in the telephoto shooting state. In the figure, 1 is a camera body, 2 is a lens barrel provided in front of this, 14 is a movable lens barrel that holds the taking lens 3 inside and is slidable in the lens barrel 2 in the optical axis direction. is there. When viewed from the front side of the camera, the taking lens 3 can see the main lens that comes in front in both the standard shooting state and the telephoto shooting state, but in the case of FIG. 2, since the camera is in the locked state, The taking lens 3 is the lens barrier 2
The front surface is covered and protected by 3. Reference numeral 4 denotes a viewfinder, which is adapted to display the lock mode, the standard shooting mode, or the telephoto shooting mode as will be described later. Reference numeral 5 is an operation member serving as a selection member for mode selection switching that can be manually moved in the left-right direction, and is a lock mode (L) that prohibits the shooting operation of the camera, and the standard shooting with the shooting lens 3 using only the main lens as standard. In shooting mode (W), the main lens is extended to the front of the camera, and a real comparator lens is added to the rear of the main lens to use as shooting lens 3 for telephoto shooting. As shown in the figure, one of the three modes can be selected by a light operation of the left hand holding the camera body 1. However, this does not apply when switching from another mode to the lock mode.

The mode switching mechanism will be described in detail with reference to FIGS. 2 and 3. 7 is the left-right direction (hereinafter,
The direction selection lever is slidable when the direction is described from the front of the camera) and is biased to the left by a mode selection lever spring 6 whose one end is fixed to the camera body 1 side. A long hole 7g loosely fitted in a pin 7f planted in the main body 1 enables lateral movement in the left and right directions. Further, the projections 7h and 7i of the mode selection lever 7 are provided.
h and 7i include slides for the first switch 20 and the switch 22, which will be described later (for example, the first switch 20).
In this case, the first and second pieces 201 and 202) are provided respectively, and these pieces are formed on a switch pattern group, which will be described later and is made of copper foil or the like provided on the printed circuit board on the camera body 1 side. By sliding, the first switch 20 and the switch 22 are opened and closed. The above-mentioned operation member 5 is provided on the mode selection lever 7, and is held on the left side by the force of the spring 6 in the lock mode shown in FIG.

Reference numeral 8 is a strobe tightening lever, and one end of which is fixed by a tightening lever spring 9 fixed to the camera body 1 side.
In the lock mode shown in FIG. 2, the rotational force is urged in the clockwise direction around the rotation center a, and this rotation force is blocked by the engagement between the locking claw 8c and the tension 10e described later, and in other modes. The tension lever protrusion 7a at the right end of the mode selection lever 7 and the bent portion 8b at one end of the strobe tension lever 8 are always in abutting state. This strobe tension lever 8
In the standard shooting mode and the telephoto shooting mode, the bent portion 8b is pushed rightward by the tightening lever projection 7a so that it can be rotated counterclockwise. The lower portion of the light emitter 10 has a long hole 10 loosely fitted to a pin 10b implanted on the camera body 1 side.
There is an elongated plate-shaped leg 10a having c, and this leg 10a
Is urged upward by a pop spring 11 whose one end is fixed to the camera body 1 side, and a notch-shaped tension 10e is provided on the upper portion of the leg 10a.
Locking claw 8 at the other end of strobe tension lever 8 in lock mode
The light emitter 10 is held in a pop-down manner as shown in FIG. 2 so that the light emitter 10 is housed in the camera body 1 by engaging with c.

Numeral 12 is urged in the counterclockwise direction by an urging force of a lock lever spring 13 which is rotatable about a shaft 12b fixed to the camera body 1 side and whose one end is similarly fixed. The lock lever is located just below the movement of the two cutout-shaped clicks 7b and 7c provided on the lower right side of the mode selection lever 7, and the mode selection lever 7 is standardly photographed by engaging with the click 7b or 7c. For example, a mountain-shaped lock claw 12a that locks at any one of the mode and the telephoto mode is provided. Further, the lower portion of the light emitter 10 is provided with a downwardly extending protruding reset button 10d together with the leg 10a, and the other end of the lock lever 12 corresponding to the reset button 10d has a push portion 12c extending upward. The engagement between any of the clicks 7b and 7c and the lock claw 12a is released by rotating the lock lever 12 clockwise by pushing the push portion 12c downward by the reset button 10d. To be done. The lock claw 12a and the click 7b or 7
The relationship with c is that by appropriately selecting their inclination angles when they are engaged, the operation members 5 are laterally operated from the outside to switch and engage them, and the camera is set to the standard photographing mode. Alternatively, it can be held in either of the telephoto shooting modes. As described above, the role of the lock lever 12 is to hold the mode selection lever 7 in the standard shooting mode or the telephoto shooting mode, and to lock the lock claw 12a and the click 7b when the light emitter 10 is pushed (pop down). 7c is released, and the mode selection lever 7 is returned to the lock mode position by the force of the mode selection lever spring 6.

The finder 4 is a mark-type finder including an objective lens 4a, an eyepiece lens 4b, a half mirror 4c, a mirror 4d, and a frame mask 4e. L (lock mode) and W (standard photographing) are provided on the frame mask 4e to indicate the respective modes. Mode) and T (telephoto shooting mode) symbol marks are attached side by side in the lateral direction, and the projection mode 7e provided on the mode selection lever 7 allows visual confirmation of the shooting mode selected in the fighter 4 and the like. It can be done. Further, these symbol marks are also provided on the camera body 1 side on the operation member 5. A motor 15 is provided in the camera body 1 as a drive source of a movable lens barrel 14 that slides in the lens barrel 2 in the optical axis direction, and this driving force rotates a feed screw 19 via gears 16, 17, and 18. , The movable lens barrel 14 in which the screw 19 is threaded.
It is configured to be transmitted to the fin-shaped screw receiving portion 14a provided on the side. The movable lens barrel 14 is extended and retracted by the forward or reverse rotation of the motor 15.

Numeral 21 detects whether the position of the movable lens barrel 14 is the position in the telephoto mode (extended position) or the position in the standard photographing mode (retracted position), and the movable lens barrel 14 is selected. This is a second switch for energizing the motor 15 until the motor 15 extends or reaches the retracted position according to the photographing mode. The second switch 21 is a three-pronged piece 21 fixed to the movable lens barrel 14 side as described later.
1 and a switch pattern group made of copper foil or the like on a printed circuit board provided on the lens barrel 2 side, and this section 211 slides on the switch pattern group to open / close the second switch 21. Is done. The energization of the motor 15 will be described later by the second switch 21 and the above-mentioned first switch 20 that determines the energization direction of the motor 15 in cooperation with the movement of the operation member 5 and the second switch 21. Is done like.

The switch 22 is used as an exposure control mechanism for turning on a switch for charging the light emitter 10 when shooting is possible, changing the light emission amount of the light emitter 10 in each of standard shooting mode and telephoto shooting mode. On the other hand, it is a switch that outputs a signal for responding to a change in the F number with respect to a predetermined aperture value in each mode. Since this switch is not an essential part of the present invention, its explanation is omitted.

Reference numeral 23 denotes the above-mentioned lens barrier, which is the movable lens barrel 1
4 is rotatably provided in the movable lens barrel 14 with the pin 23b planted on the front surface of the movable lens barrel 1 as the center of rotation.
It is urged in the clockwise direction by a barrier spring 24 fixed to the 4 side. The portion of the lens barrier 23 that is bent at a right angle projects forward from the mode selection lever 7, and the tip of the barrier switching cam 7 projects forward toward the right side and is inclined.
In contact with the inclined surface of d, a barrier pin 23a is installed which brings the lens barrier 23 in front of the taking lens 3 while charging the barrier spring 24. This barrier pin 23
Since the engagement between a and the inclined surface of the barrier switching cam 7d is released in modes other than the lock mode, the lens barrier 23 is retracted from the front surface of the taking lens 3 as shown in FIG. The portion of the lens barrier 23 having the barrier pin 23a and the portion of the barrier switching cam 7d are in a cavity (not shown) in the lens barrel 2.

FIG. 4 is an explanatory view showing the relationship between the click of the mode selection lever and the lock claw of the lock lever. In the figure, the lock claw 12a is a mountain-shaped inclined portion, and the right side of the inclined portion is a wall portion 12l which is vertically raised.
There is. The click 7b has a notch shape similar to the shape of the lock claw 12a, and the wall 1 of the lock claw 12a is formed.
It has a wall 7l for 2l. Also, click 7
The shape of e is a cutout chevron shape similar to the chevron portion of the lock claw 12a.

The lock mode can be switched to the standard shooting mode, the standard shooting mode can be switched to the telephoto shooting mode, and the telephoto shooting mode can be switched to the standard shooting mode by manually moving the operation member 5 to the left or right. But,
To switch from the standard shooting mode or the telephoto shooting mode to the lock mode by the operating member 5, click 7b on the wall portion 7l.
It is not possible because the wall portion 12l of the lock claw 12a abuts against each other and the click 7b and the lock claw 12a engage with each other.

Next, the operation of the camera according to the present invention will be described with reference to FIGS.

When the camera is in the lock mode, the camera is in the state shown in FIG. In this state, the mode selection lever 7 is positioned on the left side by the force of the mode selection lever spring 6. At this position, the tension lever projection 7a is also located on the left side, and the strobe tension lever 8 is biased in the clockwise direction by the force of the tension lever spring 9 until the tension lever projection 7a hits the strobe tension lever 8a. Locking claw 8c
Engages the clamp 10e of the leg 10a of the light emitter 10 and holds the light emitter 10 in the pop-down as described above. In addition, the movable lens barrel 14 is in a position retracted into the lens barrel 2,
The pin 23a and the barrier switching cam 7d are engaged with each other, and the lens barrier 23 covers the front surface of the taking lens 3.

Next, the operation when the lock mode is switched to the standard photographing mode will be described. The operation member 5 is manually moved to the right with the mode selection lever 7 against the force of the mode selection lever spring 6 and the clockwise rotation force of the tension lever 8 pushed by the tension lever spring 9.
Along with this movement, the tension lever projection 7a moves to the tension lever spring 9
The bending portion 8b of the strobe tightening lever 8 is pushed to the right against the force of. As a result, the locking claw 8c of the strobe tightening lever 8 rotates counterclockwise about the shaft 8a, and the engagement between the locking claw 8c and the tightening 10e is released. At this time, due to the upward bias of the pop spring 11, the light emitter 10 is pushed up and popped up until its light emitting portion 10c together with its leg 10a emerge above the camera body 1 as shown in FIG. The upward movement of the light emitter 10 causes the lock lever spring 13 to urge the lock lever 1 to move.
2 rotates in the clockwise direction together with the lock claw 12a, the lock claw 12a bites into the click 7b, and they engage with each other. At this time, since the operation member 5 is set to the position of the standard photographing mode, the movement of the operation member 5 by the manual operation is stopped.

On the other hand, the switching of the first switch 20 from the lock mode to the standard photographing mode is a state in which the motor 15 is not energized as will be described later, and the movable lens barrel 14 holding the photographing lens 3 is It is in the same position where it does not move from the position in lock mode. Further, as the mode selection lever 7 moves to the right as described above, the barrier switching cam 7d also moves to the right, so that the engagement between the cam 7d and the barrier pin 23a is released. As a result, the lens barrier 23 is rotated clockwise by the restoring force of the barrier spring 24 and retracts from the photographing lens 3 as shown in FIG. 3, and the camera is ready for standard photographing.

Next, the state of the camera when the standard shooting mode is switched to the telephoto shooting mode will be described.

The operation member 5 is manually moved together with the mode selection lever 7 to the right against the force of the mode selection lever spring 6 and the engaging force of the tension lever spring 9 or the lock claw 12a and the click 7d. At this time, the lock claw 12a is clicked 7b by the clockwise rotation of the lock lever 12.
After overcoming the inclined surface of the lock lever 12, the lock lever 12 is urged by the lock lever 12 in the counterclockwise direction to engage with the click 7c. Exactly when this engagement is performed, the mode selection lever 7 is at the position moved to the right to the full extent, and the camera is switched from the standard shooting mode to the telephoto shooting mode. With the movement of the mode selection lever 7 to the right, the first switch 20 is switched as described below, and the motor 15 is energized. The motor 15 rotates in the normal direction, and this rotational driving force is applied to the gears 16, 1
It is transmitted to the feed screw 19 via 7, 18 and by the movement of the screw receiving portion 14a by the rotation of the screw 19,
The movable lens barrel 14 is extended along the optical axis in front of the camera together with the taking lens 3. Just at the time when the taking lens 3 reaches the position of the telephoto shooting mode, the second switch 21 is switched as described later, and the power supply to the motor 15 is stopped,
The photographic lens 3 is positioned so that the telephoto shooting is possible.

On the contrary, the operation when the camera is switched from the telephoto shooting mode shown in FIG. 3 to the standard shooting mode will be described.

The operating member 5 is manually switched from the telephoto mode shown in FIG. 3 to the position of the standard photographing mode in the left direction. Along with the movement of the operation member 5, the mode selection lever 7
The protrusion 7h of the first switch 20 is also the first and second sections 2 of the first switch 20.
With 01 and 202, it moves to the left and the first switch 20 is switched as described later. At this time, the motor 1
5 is energized and rotates in the reverse direction, and this rotational force is applied to the gears 16, 1
7 and 18 and the feed screw 19 and transmitted to the movable lens barrel 14
Is retracted rearward of the camera along the optical axis to the retracted position shown in FIG. 2, and the camera is ready for standard photographing.

Next, the operation when the camera is switched from the telephoto mode shown in FIG. 3 to the lock mode shown in FIG. 2 will be described.

As shown in FIG. 3, a force to push down against the force of the pop spring 11 is applied to the head of the light emitter 10 that pops up. Then, the light emitting device 10 pops down to the position shown in FIG. 2, that is, to the position where the light emitting portion 10c of the light emitting device 10 is housed in the camera body 1. At this time, the reset button 10d of the light emitter 10 hits the push portion 12c of the lock lever 12 and pushes it down. As a result, the lock lever 12 rotates in the clockwise direction together with the lock claw 12a thereof against the counterclockwise biasing force of the lock lever spring 13, and the lock claw 1
The engagement between 2a and click 7e is released. At the time when this engagement is released, the mode selection lever 7 and the operating member 5 are fully moved leftward by the restoring force of the mode selection lever spring 6 and the tension lever spring 9. At this time, the tightening lever protrusion 7a does not press the bent portion 8b, and the restoring force of the tightening lever spring 9 causes the strobe tightening lever 8 to rotate in the clockwise direction together with the locking claw 8c. As a result, the locking claw 8c and the tension 10e are engaged, and the light emitter 10 is held in the pop-down state against the force of the pop spring 11.

On the other hand, when the projection 7h of the mode selection lever 7 is moved leftward to the lock mode position, the first switch 20 is switched as described later. Due to the relationship between the switched first switch 20 and the second switch 21 switched at the position of the telephoto shooting mode as shown in FIG. 3, the motor 15 is energized as described later. As described above, the motor 15 rotates in the reverse direction, and retracts the movable lens barrel 14 together with the taking lens 3 to the position shown in FIG. 2, that is, the standard photographing mode position (lock mode position), behind the camera. When this movable lens barrel 14 is retracted,
When the barrier pin 23a contacts the inclined surface of the barrier switching cam 7d and the barrier pin 23a is guided along the inclined surface, a counterclockwise force is applied to the lens barrier 23 and the barrier spring 24 is charged while the lens barrier 23 is charged. Closes by rotating counterclockwise so as to cover the front surface of the taking lens 3.

As described above, the light emitter 10 is popped down and the lens barrier 23 covers the front surface of the taking lens 3, whereby the camera is held in the locked state.

Although the operation of switching from the lock mode to the telephoto shooting mode has not been described, the operation of switching the lock mode to the standard shooting mode and the operation of switching from the standard shooting mode to the telephoto shooting mode are combined. This is self-evident and the description of this operation is omitted. Also, when switching from the standard shooting mode to the lock mode, except for the movement of the movable lens barrel 14, the operation is substantially the same as the above-mentioned switching operation from the telephoto shooting mode to the lock mode, and a description thereof will be omitted. However, the mode selection lever spring 6 moves the mode selection lever 7 to the left side together with the barrier switching cam 7d, and at this time, the barrier switching cam 7d pushes the barrier pin 23a to the left side. As a result, the lens barrier 23
Is closed against the force of the lens barrier spring 24.

When switching from the telephoto shooting mode or the standard shooting mode to the lock mode, the operation member 5 cannot be switched even if it is operated. This is because, in the standard photographing mode, the lock claw 12a and the click 7b are engaged with each other, and the walls 12l and 7l abut against each other to be locked. This is because the operation member 5 and the mode selection lever 7 do not move to the left lock mode position in addition to the movement. Therefore, these switching is performed only by pushing the light emitter 10 as described above.

In the above description, the Fider 4
However, the index 7e is also positioned according to the positioning of the operating member 5 at each mode position, and depending on the state of the selected mode, L and W on the frame mask are displayed to clearly indicate the mode. , T is indicated by the index 7e. Therefore, when the operation member 5 is switched, the operation member 5 may be switched while visually confirming which mode the mode is in through the finder 4.

Next, a circuit and the like for retracting and retracting the movable lens barrel 14 will be described with reference to FIG. Two
Reference numeral 0 is the above-mentioned first switch, which is composed of two integrally-moving bifurcated pieces 201 and 202 and first to sixth switch patterns 203 to 208, and is composed of first and fourth switch patterns 203. , 206 are from the position in the lock mode (position L in the drawing, hereinafter abbreviated as L position) to the position in the telephoto shooting mode (position T in the drawing, hereinafter abbreviated as T position), and are the second. The fifth and fifth switch patterns 204 and 207 extend from the L position to the standard photographing mode position (the position W in the figure, hereinafter abbreviated as the W position), and the third and sixth switch patterns 205 and 20.
8 is a second and fifth switch pattern 20
It is at the T position on the extension of 4,207. Here, the first segment 201 is the first switch pattern 203, the second switch pattern 204, and the third switch pattern 2
05, and the second section 202 slides on the fourth switch pattern 206, the fifth switch pattern 207, and the sixth switch pattern 208 to open and close the first switch 20. To do.

Reference numeral 21 is the above-mentioned second switch, which is a three-forked third segment 211 and the seventh to ninth switch patterns 2.
12 to 214, and the seventh switch pattern 2
12 is from the movable lens barrel extension position to the front of the movable lens barrel extension position, the eighth switch pattern 213 is from the movable lens barrel extension position to the movable lens barrel extension position, and the ninth switch pattern 214 is the movable lens barrel extension position. It is from the position to the front of the movable lens barrel extension position. It should be noted that here, the movable lens barrel extension position of the switch pattern means that the third segment 211 comes into contact with the switch pattern in this position at this position where the movable lens barrel is completely extended, and the switch pattern The movable lens barrel retraction position of 4 may be similarly interpreted. The second switch 2
The opening and closing of 1 is for the seventh to ninth switch patterns 212 to 2
It is performed by sliding the third section 211 on the surface 14.

Here, the first switch pattern 203
The fourth switch pattern 206 and the fourth switch pattern 206 are connected by the power supply battery 25, and the second and sixth switch patterns 20 are connected.
4, 208 are connected to the seventh and ninth switch patterns 212 and 214, respectively, and the third and fifth switch patterns 205 and 207 are commonly connected to one terminal of the motor 15 for the eighth switch. The pattern 213 is the motor 15
It is connected to the other terminal. In the lock mode, the first and second sections 201 and 202 of the first switch 20 are in the L position, that is, the positions shown by the solid lines in the figure, and the third section 211 is in the movable lens barrel retracted position and in the solid lines in the figure. It is located like Therefore, in this state, the third section 211
Since the contact with the seventh switch pattern 212 is cut off, the motor 15 is not energized.

Even if the operation member is switched as described above to change the camera from the lock mode to the standard photographing mode,
The sections 201 and 202 of FIG. 3 only move from the L position to the W position, and the switching state of the first switch 20 at this time is the same as in the lock mode. Therefore, the motor 15 is not energized and the movable lens barrel 14 is held at the same position (the position shown by the solid line in the figure).

Next, when the operation members are switched as described above to change the camera from the lock mode or the standard photographing mode to the telephoto photographing mode, the first and second sections 201 and 202 are provided.
Is located at the position indicated by the dashed line from the L or W position to the T position. Then, the power supply battery 25 → first switch pattern 203 → first segment 201 → third switch pattern 205 → motor 15 (current is in the direction of arrow A) →
Eighth switch pattern 213 → third segment 211 →
The ninth switch pattern 214 → the sixth switch pattern 208 → the second section → the fourth switch pattern 206 → the closed circuit of the power supply battery 25 is formed, and the motor 15
Is energized to rotate forward and the movable lens barrel 14 is extended from the position indicated by the solid line to the movable lens barrel extension position indicated by the two-dot chain line. Exactly when the movable lens barrel 14 is moved to this position and positioned, the contact between the third segment 211 and the ninth switch pattern 214 is cut off as shown by the alternate long and two short dashes line. The circuit becomes an open circuit, the power supply to the motor 15 is cut off, and the movable lens barrel 14 stops moving and is positioned.

Next, the operation members are switched as described above,
When the camera is switched from the telephoto mode to the standard mode or the light emitter is popped down to the lock mode,
The first and second sections 201 and 202 are T indicated by the one-dot chain line.
The position is switched to the W or L position.

At this time, the power supply battery 25 → first switch pattern 203 → first segment 201 → second switch pattern 204 → seven switch pattern 212 →
Third segment 211 → eighth switch pattern 213 →
Motor 15 (current is in the direction of arrow B) → fifth switch pattern 207 → second segment 202 → fourth switch pattern 206 → a closed circuit of the power supply battery 25 is formed, and the motor 15 is energized to rotate in the reverse direction. Then, the movable lens barrel 14 is retracted from the position indicated by the chain double-dashed line to the movable lens barrel retracting position indicated by the solid line. Exactly when the movable lens barrel 14 is moved and positioned at this position, the contact between the third section 211 and the seventh switch pattern 212 is cut off as shown by the solid line in the position of the third section 211. The closed circuit becomes an open circuit, the power supply to the motor 15 is cut off, the movable lens barrel 14 stops moving, and the movable lens barrel 14 is positioned.

The switching from the standard photographing mode to the lock mode by popping down the light emitting device is the same as the reverse operation at the time of the reverse switching, and the motor 15 is not energized as described above, and there is no change.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 6 is an explanatory view showing a state in which the movable lens barrel is collapsed in the lock mode, and FIG. 7 is an explanatory view including a circuit for driving the camera shown in FIG. The present embodiment is different from the above-described examples in that another movable lens barrel position in which the movable lens barrel is retracted into the camera in the lock mode is provided. The parts of the camera denoted by the same reference numerals as those in the above-mentioned example are exactly the same as those in the above-mentioned configuration, and therefore their explanations are omitted. Reference numeral 7'denotes a mode selection lever which moves with the manual operation of the operating member 5 to the left or to the right, and the projection 7h has a first switch 20 'having a first 201' and a second 'section 201', 202 'is provided,
The sections 201 'and 202' slide on the switch pattern group fixed to the camera body 1 side to open and close the first switch 20. The right end of the mode selection lever 7 ', the projection 7'a of the mode selection lever, and the bent portion 8b of the strobe tightening lever 8 are spaced apart from each other in the lock mode, and the camera is not locked in the lock mode. To make the camera ready for shooting, the selection lever projection 7'a must abut the bent portion 8b unless the mode selection lever 7'is fully slid to the right in the telephoto shooting mode from the position in the standard shooting mode. Then, it is not possible to push this to release the engagement between the tension 10e and the locking claw 8c and pop up the light emitter 10. Therefore, in order to put the camera in the shooting state (telephoto shooting mode) from the lock mode, the light emitting device 10 is moved by manually operating the operation member 5 to the position of the telephoto shooting mode.
Pops up, and the first switch 20 'described below
The motor 15 is energized to switch the movable lens barrel 14 to the movable lens barrel extension position (hereinafter, abbreviated as KT position) on the telephoto side as shown in FIG. 3, and at this time, the second switch 21 is switched. 'Switching stops the energization of the motor 15 and the movable lens barrel is positioned at the LT position.
Of course, at this time, the lens barrier 23 is retracted from the front surface of the taking lens 3 as in the above-described example, and the telephoto shooting can be performed.

When switching from the telephoto shooting mode to the standard shooting mode, it is obvious from the above example that the description is omitted.

When switching from the telephoto shooting mode or the standard shooting mode to the lock mode, it can be performed by pushing the head of the light emitter 10 with a hand and popping it down as in the above-described example. However, the point different from the above-described example is that the mode selection lever spring 6 restores the mode selection lever 7'to the left, which is the lock mode position, to the left. At this time, the first switch 20 'is changed over, the motor 15 is energized, and the movable lens barrel 14 is moved to the movable lens barrel retracted position (shown in FIG. 2 (where the lens barrier 23 is open)). Hereinafter, it will be abbreviated as the LW position.) Or from the LT position similar to that shown in FIG.
Further, the movable lens barrel storage position (hereinafter, abbreviated as LL position) located in the rear of the camera is retracted. When the movable lens barrel 14 reaches the LL position, the second switch 21 'is switched to cut off the power supply to the motor 15 as described later, and the movable lens barrel 14 is positioned at this position and retracted. Of course, as in the above example, the barrier pin 23a is guided along the inclined surface of the barrier switching cam 7d, and the lens barrier 23
Covers the front surface of the taking lens 3 and closes it.

Next, the driving of the movable lens barrel 14 will be described with reference to FIG. In the figure, 201 ', 20
Reference numeral 2'denotes the first 'and second' sections of the two forks that move electrically independently of each other. The solid line indicates the L position, the one-dot chain line indicates the W position, and the two-dot chain line indicates the T position. It means being in a position. Reference numerals 203 'to 209' are first to seventh switch patterns, and first to fifth switch patterns 203 'and 207' are from the L position to the T position, and are for the sixth switch. Pattern 20
7'is from the L position to the T position, the 2'switch pattern 204 'is only in the L position, the 3'switch pattern 205' is in the W position only, and the 4'and the 7 '.
The switch patterns 206 'and 209' are provided only at the T position. The first switch 20 'is composed of 1'and 2'sections 201' and 202 'and 1'to 7'switch patterns 203' to 209 '. Note that the first 'switch pattern 203'
2'to 4'switch patterns 204 'to 206' are arranged in a straight line in parallel with, and the 1'section slides on these 1'to 4'switch patterns. To switch. In addition, 6'and 7'switch patterns 208 'and 209' are arranged in a straight line in parallel with the 5'switch pattern 207 ', and the 2'section 202' is the 5'th to the 5'th. 7'switch pattern 20
Switching is performed by sliding on 7'-209 '.

Reference numeral 211 'denotes four or more electrically conducting sections, which are shown by the solid line at the LL position, the one-dot chain line at the LW position, and the two-dot chain line at the LT position, respectively.
The same applies to the movable lens barrel 14. 212 '
˜215 ′ are 8′˜11 ′ switch patterns, which are arranged in parallel and are arranged in 8 ′ switch pattern 21.
2'is from the LT position to the front of the LL position, the 9'th switch pattern 213 'is from the LT position to the LW position front, and the 10'th switch pattern 214' is from the LT position to the LL position, The eleventh switch pattern 215 ′ extends from the LL position to the front of the LT position. The second switch 21 'is composed of a third' segment 211 'and an 8'th to 11'th switch pattern, and the third' segment 211 'is on the 8'th to 11'th switch pattern. Sliding to switch. In addition, the first '
The 7'th switch pattern and the 8'th to 11'th switch patterns are formed, for example, by applying copper foil or the like on each printed circuit board.

The power supply battery 25 is connected between the 1'and 5'switch patterns 203 'and 207', and the 2'and 8'switch patterns 204 'and 212', and the 3'and'switch patterns. 9'switch patterns 205 'and 21
3 ', 4'switch pattern 206' and motor 1
5 one input terminal and 6'switch pattern 20
8 ', 9'and 11' switch patterns 209 '
And 215 ′, the 10th ′ switch pattern 214 ′ and the other input terminal of the motor 15 are connected respectively. The first 'and the second' sections 201 'and 202' are L
When the position is switched to the T position, 25 → 206 ′ → 15
(The current rotates in the direction of arrow A) → 214 '→ 211' →
A closed circuit of 215 ′ → 209 ′ → 207 ′ → 25 (the name is omitted here for simplifying the description. The same applies hereinafter), and the movable lens barrel 14 in the LL position and the third 'segment 211 'is extended to the LT position. When they reach this position, the contact between the 3'section 211 'and the 11' switch pattern is broken, the closed circuit becomes an open circuit, the motor 15 is stopped, and the movable lens barrel 14 is moved to the LT. Positioned in position.

First 'and second' sections 201 ', 20
When 2'is switched from T position to W position, 25 → 20
3 '→ 201' → 205 '→ 213' → 211 '→ 21
4 '→ 15 (current reversely rotates in the direction of arrow B) → 208' →
A closed circuit 202 ′ → 207 ′ → 25 is formed, and the movable lens barrel 14 at the LT position and the third ′ segment 211 ′ are LW.
Be put into position. The movable lens barrel 14 is attached to the third section 21.
When 1'and the LW position are reached, the 3'th section 211 '
Then, the contact of the 9'th switch pattern 213 'is cut off, the closed circuit becomes an open circuit, the motor 15 is stopped, and the positioning of the movable lens barrel 14 to the LW position is completed. Since switching from the W position to the T position of the first 'and second' sections 201 'and 202' is the same as switching from the L position to the T position, the description thereof is omitted because it is obvious.

The first 'and second' sections 201 ', 20
Switching from 2'W position or T position to L position
25 → 203 '→ 201' → 204 '→ 212' → 21
1 '->214'-> 15 (current flows in the direction of arrow B in the reverse rotation direction)-> 208 '->202'-> 207 '-> 25 forms a closed circuit, and the reverse rotation of the motor 15 causes the movable lens barrel 14 and the third'. Section 211 'is rewound from the LW position or the LT position to the LL position further behind the camera. When the movable lens barrel 14 and the 3'section 211 'reach the LL position, the contact between the 3'section 211' and the 8'switch pattern 212 'is cut off, and the motor 15 stops rotating. Then, the movable lens barrel 14 and the third section 211 'are positioned at this LL position and retracted.

In the mark type finder of the above embodiment, the L, W and T symbol marks were indicated by the index, but in addition to this, the mask index 7e having the notch was used and selected as shown in FIG. It is also effective to make only the mode symbol mark stand out.

As described above in detail regarding the embodiments of the present invention, a. Since the operating member for opening and closing the lens barrier and the member for selecting the focal length of the lens are commonly used as one operating member, the operability can be greatly improved.

B. In response to the operation of the operation member for opening the lens barrier, the lens is moved from the non-photographing position further retracted from the wide-angle end to the photographing possible position by the motor, so that instantaneous photographing is possible.

C. In response to the operation of the operating member for closing the lens barrier, the lens length is shortened by interlocking with the closing operation of the lens barrier by retracting the lens further from the wide-angle end regardless of the focal length position. The portability can be improved at the same time.

[0054]

According to the present invention, in response to the operation of the barrier moving member for closing the lens barrier, the lens barrier closing operation is interlocked by further retracting the lens regardless of the focal length position from the wide angle end. Thus, the lens length can be shortened, and the portability when not in use can be improved.

[Brief description of drawings]

FIG. 1 is an external view of a camera according to the present invention.

FIG. 2 is an explanatory view showing a mechanism of a main part of a camera according to the present invention in a lock mode.

FIG. 3 is an explanatory view showing a mechanism of a main part of a camera according to the present invention in a telephoto shooting mode.

FIG. 4 is an explanatory diagram of a relationship between a lock claw and a click.

FIG. 5 is an explanatory diagram of a drive circuit of a motor of the camera according to the present invention.

FIG. 6 is an explanatory diagram of an embodiment of the camera of the present invention.

FIG. 7 is an explanatory diagram of a drive circuit shown in FIG.

FIG. 8 is an explanatory view of another embodiment of the mark finder.

[Explanation of symbols]

 1 camera body 2 lens barrel 3 taking lens 4 mark type viewfinder 5 operating member 7, 7'mode selection lever 7b, 7c click 7d barrier switching cam 8 strobe tightening lever 10 light emitter 10d reset button 12a lock claw 14 movable lens barrel 15 Motor 20, 20 'First switch 21, 21' Second switch 23 Lens barrier 23a Barrier pin 24 Barrier spring

Claims (1)

[Claims] 1. A lens constituting a photographing optical system is moved from the wide-angle side to the front of the optical axis to change the focal length to the telephoto side, and the lens is moved from the telephoto side to the rear of the optical axis to the wide-angle side. In a focal length switching type camera that changes the focal length, a lens moving mechanism for moving the lens in the optical axis direction using a motor as a drive source, a first state for moving the lens to the wide angle side, A lens position selection member that selects one of a second state in which the lens is moved to the telephoto side, a detection unit that detects the selection state of the lens position selection member, and the lens position selection unit that detects the lens position. When it is detected that the selection of the member is in the first state, the motor is driven to move the lens to the wide angle side, and the lens position selection unit is detected by the detection means. The selection of the second
When it is detected that the motor is driven, the first motor control means for driving the motor to move the lens to the telescope, a closed position covering the front of the optical axis of the lens, and the main lens A lens barrier that moves to an open position that retracts from the front of the optical axis, a barrier moving member that moves the lens barrier to any one of the closed position and the open position, and the barrier moving member to the lens barrier When the lens is operated to move to the closed position, a second motor control means for driving the motor to move the lens further to the optical axis rear side than the wide-angle end is provided. Switchable camera.