JPH06294991A - Camera with lens barrier - Google Patents

Abstract

PURPOSE:To provide a camera with a lens barrier which can prevent interference between a lens barrel and a barrier in accordance with the closing action of the barrier by using a mechanism whose constitution is simple and which does not cause the waste of the electric power of a driving motor or the damage of an internal mechanism. CONSTITUTION:As for the camera constituted so that the lens barrel 3 is covered with the barrier 2 in a collapsible mounting state, the barrier 2 is moved so as to expose the lens barrel 3 in a photographing state and the lens barrel 3 is positioned in the moving locus of the barrier 2 in the photographing state; the movement of the barrier 2 can be obstructed by a lock member provided on the barrier 2 even when the barrier 2 is moved in a closing direction in the case that the lens barrel 3 is set at the position of the photographing state. Besides, when the lens barrel 3 is restored to a collapsible mounting position, the obstruction of the lock member is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera with a lens barrier, and more particularly to a camera having a lens barrier for protecting a taking lens.

[0002]

2. Description of the Related Art As a camera with a lens barrier incorporating an openable / closable lens barrier, those having various structures have been conventionally proposed. For example, Japanese Patent Laid-Open No. 1-25
There is a camera with a lens barrier disclosed in JP-A-5839 and JP-A-1-288842. In this camera, if the lens barrier is moved from the open position to the closed position when the lens barrel is in the extended position where it projects from the front surface of the camera, the lens barrier is in the semi-open position where it does not interfere with the lens barrel. Locked and prevented from moving. In addition, the lens barrel is driven to a retracted position where it retracts from the front surface of the camera along with the movement to the semi-open position, and the lock is released in conjunction with the movement of the lens barrel, and the lens barrier is moved to the closed position. It is possible to move.

[0003]

However, the above-mentioned Japanese Patent Laid-Open Nos. 1-255839 and 1-288.
In the camera with a lens barrier disclosed in Japanese Patent Publication No. 842, the lock is released in conjunction with the electric drive of the lens barrel, but if a force is applied in the closing direction when the barrier is locked, the motor It was supposed to use the electric power wastefully because the load current increased. Furthermore, there is a risk that the internal mechanism may be damaged and the lens barrel may stop halfway.

The present invention has been made to solve the above-mentioned problems, and by using a mechanism having a simple structure, interference between the lens barrel and the barrier due to the barrier closing operation can be prevented.
Moreover, it is an object of the present invention to provide a camera with a lens barrier that does not waste the power of the drive motor and damage the internal mechanism.

[0005]

In a camera with a lens barrier according to the present invention, the photographing lens is covered with a barrier in a non-photographing state, and in the photographing state, the barrier moves so as to expose the photographing lens, and the barrier moves. In a camera in which a shooting lens is located within a locus, the barrier is provided on the barrier, and the barrier is retracted from the movement path along the optical axis of the shooting lens, and then the position is set in the movement path along the optical axis of the lens. When the photographing lens is in the movement locus of the barrier, the movement of the barrier is blocked, and when the photographing lens is out of the movement locus of the barrier, the movement blocking state of the barrier is released. It is characterized by having stop means.

[0006]

When the photographing lens is located on the moving path of the barrier, the movement of the barrier is blocked. Also,
When the taking lens moves out of the movement path of the barrier, the barrier movement blocking state is released.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a camera with a lens barrier according to a first embodiment of the present invention. In addition, this figure shows the full cover type barrier 2 which can move the front of the main body in the left and right directions.
It shows a state in which the lens barrel 3 holding the taking lens is extended to an initial shooting position, which is a shooting state. In addition,
In this camera, the lens barrel 3 is retracted to the retracted position in the non-photographing state based on the closing operation of the barrier 2. The camera of the above embodiment will be described with reference to the configurations of the camera front surface portion and the barrier mechanism portion. As shown in FIG. 1, the camera body 1 is provided with a barrier 2 slidably disposed on the front surface thereof. Engagement guide groove 1 for supporting
A and 1b are formed in the upper and lower parts thereof so as to extend in the left-right direction.

A strobe window 4, a finder window 5, a distance measuring light receiving window 6, a distance measuring light emitting window 8, a light measuring window 7, a self-timer display window 9 and the like are arranged above the front surface of the camera body 1. To be done. Further, a photographing lens barrel 3 which is movable back and forth in the direction of the optical axis O is disposed in the central portion. A release button 10 for operating a release switch is provided on the upper surface of the camera body 1. By moving the barrier 2 to the right in the figure, the lens barrel 3 is retracted to the retracted position in the camera body 1, and the barrier 2 causes the self-timer display from the light-receiving window 6 for distance measurement. The window 9 is covered.

FIG. 2 is a perspective view showing a state in which the barrier 2 is removed in a state where the camera is capable of photographing. As shown in the figure, a locking projection 1f on the camera body 1 side is provided on the front surface of the camera. Further, a barrier detection switch 1c having contact pieces 1d and 1e for detecting the open / closed state of the barrier 2 is also provided on the front surface. The open / closed state of the barrier 2 is determined by the contact state of the contact pieces 1d, 1e. The protrusion 1f and the barrier detection switch 1c are always covered by the barrier 2 regardless of the open / close position, and are not exposed.

Further, the concave portion 1k provided on the front surface of the main body 1 is a member mounted on the barrier 2, and the tip of the abutting member 11 capable of abutting on the lens barrel 3 is slidable. It is a recess for fitting into. By fitting the contact member 11 into the recess 1k, the front surface 1g of the camera and the front surface of the contact portion 11d of the contact member 11 are flush with each other.
I try not to make the appearance unpleasant. Further, the small hole 1h provided on the upper front surface of the camera body 1 is a ball hole for giving a click action of the barrier 2, and the click spring 15 and the click ball 16 are fitted therein. When the barrier 2 is in the fully open or fully closed position,
Click recesses 2i and 2j disposed inside the barrier 2
The ball 16 is fitted into the.

FIG. 3 is a perspective view of the barrier 2 in an assembled state as seen from the inner surface side opposite to the direction A in FIG. As shown in the figure, the barrier 2 has guide pins 2c for sliding an abutting member 11 to be described later in the left-right direction,
2d, guide pins 2g and 2f for sliding a lock member 12 described below in a vertical direction, a pin 2k pivotally supporting a lock gear 13 described below, and the abutment member 11
3, a U-shaped protrusion 2e for holding the contact spring 14 that applies a bias to the left is formed. One end of the contact spring 14 is supported by the contact member 11, and the other end has walls 2m and 2l forming the protrusion 2e (see FIG. 7).
It is installed by pressing it firmly in between and never falling.

Further, the barrier 2 has engagement guide portions 2a, 2b with the camera body 1 so as to be slidably supported in the left-right direction with respect to the camera body 1. The guide portions 2a and 2b are slidably fitted in the guide grooves 1a and 1b provided on the upper and lower sides of the camera body 1, respectively, and the barrier 2 is mounted.

The protrusion 2h provided on the barrier 2 is a contact piece 1 of the barrier detection switch 1c provided on the camera body 1.
It is a protrusion for pressing e. Then, when the barrier 2 is at the fully open position, the contact piece 1e is pressed to move the contact piece 1e.
e and the contact piece 1d are brought into contact with each other, and the barrier detection switch 1
Turn on c.

The concave recesses 2i and 2j provided on the inner surface above the barrier 2 are click recesses and cannot be observed from the outside. The click ball 16 fitted in the small hole 1h in the upper portion of the camera body 1 falls into these click recesses 2i, 2j, gives a click feeling, and stops the barrier 2 at a predetermined position. That is, the ball 16 is placed in the recess 2i.
When the ball 16 is fitted, the barrier 2 is in the fully open position, and when the ball 16 is fitted in the recess 2j, the barrier is in the fully closed position.

The contact member 11, the lock contact member 12,
The pins 2c, 2 in which the lock gear 13 is arranged on the barrier 2
In order to prevent the pins 2c, 2k, etc. from falling off, a well-known technique, for example, as shown in FIG. 3, a washer or the like is fitted into the pins 2c, 2f, 2k, etc. and fixed by heat caulking or the like.

The abutting member 11 is a member for detecting whether or not the lens barrel 3 is positioned on the trajectory of movement of the barrier, and the pins 2c and 2d arranged on the barrier 2 have elongated holes 11e. Is slidably fitted and held so as to be movable in the left-right direction. The contact spring 14 is always positioned in a state of being urged to the left in FIG. 3 by the urging force of the contact spring 14. Further, the corresponding contact member 11 has a rack portion 1
1a, an abutting portion 11b capable of abutting on the lens barrel 3, and a protrusion 11c for holding one end of the abutting spring 14 are formed. One end of the contact spring 14 is provided with the protrusion 11c.
, And the other end of the contact spring 14 is supported by the U-shaped projection 2e as described above.

The lock gear 13 is rotatably fitted to and supported by the pin 2k of the barrier 2 and meshes with the rack portion 11a of the contact member 11. Further, the lock member 12 is an L-shaped member and is a locking means for preventing the barrier movement. The L-shaped tip of the lock member 12 has a camera-side lock protrusion 1f (see FIG.
The lock contact portion 12b is provided so as to be capable of contacting with the lock contact portion 12b. Further, it has elongate holes 12c and 12d which fit into the pins 2g and 2f of the barrier 2 and is slidably supported in the vertical direction. Further, it also has a locking rack portion 12a, and the rack portion 12a has the lock gear 13 described above.
Meshes with. With the rotation of the lock gear 13, the lock member 12 moves up and down.

Since the contact member 11 is biased to the left as described above, if the contact portion 11b of the contact member 11 is in the released state, the contact member 11 moves to the left, The lock member 12 descends to the lowest position. In this lowered state, the lock contact portion 12b of the lock member 12 is located at a height that does not contact the lock protrusion 1f of the camera body 1 (see FIG. 7).

Further, when the lock member 12 is in the lowered state, the abutment portion 11b of the end face of the abutment member 11 is engaged with the abutment spring 1.
When the lock gear 13 is pressed to the right in FIG. 3 against the biasing force of 4, the lock gear 13 is rotated counterclockwise, and the lock member 12 moves upward. In this upward movement state, the lock contact portion 12b of the lock member 12 is located at a height at which it can abut the lock protrusion portion 1f of the camera body 1 (see FIG. 9). Further, when the pressing force is released to the contact member 11, the contact member 11 is returned to the left in FIG. 3 by the urging force of the contact spring 14, and the lock member 12 also moves downward. .

FIG. 4 is a sectional view taken along the line BB in FIG. 1 showing the state where the barrier is fully opened. The lens barrel 3 holds a taking lens. Further, it has a fitting hole 3a and a screw hole 3b, and is supported by the guide rod 25 and the screw 23 through the fitting hole 3a and the screw hole 3b, and can be moved back and forth in the optical axis O direction. . The lens barrel 3 is equipped with an encoder contact piece 24 for detecting the moving position of the lens barrel 3, and a lens shutter device (not shown) is also mounted.

The encoder 19 arranged on the side of the lens barrel 3 has a retracted state detection pattern 19a, a photographing preparation state detection pattern 19b, and a common pattern 19c. Then, via the encoder contact piece 24, the collapsed state is detected by the ON signals of the common pattern 19c and the pattern 19a, and the shooting preparation state is detected by the ON signal of the pattern 19b. These output signals are respectively taken in by the CPU 17 (see FIG. 5) described later.

A screw gear 23a is fixed to the tip of the screw 23. The gear 23a
Engages with a pinion 21 attached to the rotary shaft of the drive motor 20. When the motor 20 is driven, the lens barrel 3 is driven back and forth in the optical axis direction. Then, the lens barrel 3 is retracted to a retracted position where the movement trajectory of the barrier 2 does not interfere in the non-photographing state, and is extended outward to interfere with the movement trajectory of the barrier 2 in the photographing state. An encoder (not shown) different from the encoder 19 is interlocked with either the gear 23a or the gear 21,
The focusing position of the lens barrel 3 is detected.

The state shown in FIG. 4 is a state ready for photographing, and the patterns 19b and 19c are turned on by the contact piece 24. When the release button 10 is pressed in this state, the lens barrel 3 further advances in the direction of the arrow shown in the figure to perform focusing. In this state, the barrier 2 is retracted, and the contact member 11 does not contact the lens barrel 3.

FIG. 5 is a main electric circuit diagram of the lens barrel drive section and the encoder section of the camera of this embodiment. Each operation of this camera is controlled by the CPU 17. The motor drive driver circuit 18 is controlled by the CPU 17 to drive the drive motor 20 to drive the lens barrel 3
Move back and forth in the direction of the optical axis. Further, the CPU 17 includes a retracted state detection switch 19a for the lens barrel 3, an output signal from the photographing preparation position detection switch 19b, and a barrier detection switch 1c which is a switch for detecting that the barrier 2 is fully opened. The output signal, the output signal of the release switch 10a operated by the release button 10 and the like are input.

Next, the photographing operation including the barrier opening / closing operation of the camera of the present embodiment configured as described above will be described. FIG. 6 is a general flow chart showing the operation of the camera, particularly the operation of the taking lens barrel associated with the barrier opening / closing operation. Now, from the closed state of the barrier 2, the barrier 2 is manually moved in the opening direction, and when the barrier 2 is almost fully opened, the barrier detection switch 1c is turned on. That is, the contact pieces 1d and 1e contact each other, and the processing program by the CPU 17 starts. And step S1
At 17, the CPU 17 sends a drive signal to the lens drive driver circuit 18 to drive the motor 20 so as to extend the photographing lens barrel 3 retracted in the camera to the photographing preparation position. In step S2, the CPU 17 drives the motor 20 to check whether the photographing lens has reached the photographing preparation position. When the switch 19b detects that the photographing lens barrel 3 has reached the photographing preparation position,
In step S4, driving of the motor 20 is stopped.

Thereafter, the process proceeds to step S4, and it is checked with the switch 10a whether or not the release button 10 has been operated. When the switch 10a is turned on,
In step S5, the shooting sequence process is executed.
If the release switch 10a is off in step S4, the process jumps to step S6 to check whether the barrier detection switch 1c of the barrier 2 is on or off. When the switch is turned off, that is, when the barrier 2 is manually moved in the closing direction, the process proceeds to step S7 at the initial stage, and the lens barrel 3 is driven in the retracting direction.

Then, in step S8, it is checked by the output signal of the encoder 19 whether the lens is in the lens collapsed state. When it is determined that the lens barrel 3 has been retracted, the process proceeds to step S9, the driving of the lens barrel 3 is stopped, and this routine is ended.

Next, the operation of the lens barrel 3 and the barrier 2 associated with the opening / closing operation of the barrier 2 in the camera of this embodiment will be described with reference to FIGS. 7 to 11 show the barrier 2
Shows the state of the lens barrel 3 at each moving position, but shows the state in which a part of the barrier 2 is broken so that the operating state of each member can be understood.

FIG. 7 is a front view of the camera, which is already in the shooting preparation state, with the barrier 2 fully opened. In the state shown in FIG. 7, the contact piece 1 of the barrier detection switch 1c is
e and 1d are turned on by the protrusion 2h of the barrier 2 and the photographing can be executed at any time. Therefore,
The lens barrel 3 is also in a state in which it can be extended by focusing. The contact member 11 on the barrier 2 side is biased to the right by the contact spring 14 and is in the protruding position, but the pin 2d and the guide groove 11e are in contact with each other, so that the tip of the contact member 11 contacts. The contact portion 11b is not in contact with the lens barrel 3.

When the barrier is moved in the P direction (right direction) in FIG. 7 to close the barrier 2 after the photographing is finished, the barrier detection switch 1c is turned off in the closing process as shown in FIG. Become. The drive motor 20 (see FIG. 5) drives the lens barrel 3 so as to retract the lens barrel 3, and the lens barrel 3 starts to retract. However, since the operating speed of the barrier 2 is usually faster than the collapsing speed of the lens barrel 3, the operating speed of FIG.
The contact member 11 that moves integrally with the barrier 2 as shown in FIG.
The contact portion 11b comes into contact with the outer peripheral surface 3c of the lens barrel 3. In this initial state of contact, the lock gear 13 has not yet rotated, and the lock member 12 has not moved in the vertical direction.

When the barrier 2 is further moved rightward, the state shown in FIG. 9 is obtained. In this state, the barrier 2 moves in the P direction while the contact surface 11b of the contact member 11 is still in contact with the outer peripheral surface 3c of the lens barrel 3, so that the contact member 11 moves toward the barrier 2. It moves relatively in the Q direction. Then, the lock gear 13 is rotated clockwise by the rack 11 a of the contact member 11. The rotation consequently pushes the lock member 12 upward. Then, the lock contact portion 12a of the lock member 12 rises to a position where it can contact the lock protrusion 1f on the camera body 1 side. Furthermore,
The protruding portion 1f and the lock contact portion 12a come into contact with the barrier 2, and the barrier 2 is locked in that state without moving in the P direction any further.

Thus, the contact surface 11b is the outer peripheral surface 3c.
When the lens barrel 3 is in contact with the barrier 2, the movement of the contact member 11 detects that the lens barrel 3 is positioned in the movement path of the barrier 2, and the movement of the barrier 2 in the direction of the lens barrel 3 is restricted. . Of course, during this period, the lens barrel 3 continues to be retracted. The outer peripheral surface 3c of the lens barrel 3 slides in pressure contact with the contact surface 11b of the contact member 11.
However, the force in the P direction that urges the contact member 11 is only the urging force of the contact spring 14, which is a small force amount of several g, and has almost no effect on the lens collapsing operation.

This state continues for a while, and when the lens barrel 3 approaches the retracted position, the state shown in FIG. 10 is obtained. In this state, the outer peripheral surface 3c of the lens barrel 3 and the contact portion 1 of the contact member 11
The contact relationship with 1b is released, and the contact member 11 projects to the lens barrel front surface 3d by the urging force of the contact spring 14.
The protrusion of the contact member 11 causes the rack portion 11a to rotate the lock gear 13 in the counterclockwise direction, and the lock member 12
The rack 12a is moved downward. Then, the contact portion 12b of the lock member 12 is disengaged from the lock protrusion portion 1f on the camera body 1 side, and the barrier 2 is again ready to move in the P direction. Then, when the barrier 2 is moved in the P direction,
The state shown in FIG. 11, that is, the fully closed state in which the photographing lens is completely covered is obtained. At that time, the lens barrel 3 is, of course, completely retracted to the retracted position. In this state, the contact portion 11d of the contact member 11 is pressed by the camera body 1, and the lock member 12 is moving upward.

If the barrier 2 is opened again in the Q direction from the fully closed state of FIG. 11 until it stops, the barrier detection switch is turned on by 2h and the lens barrel 3 is attached to the camera body 1
It is possible to project outward. FIG. 7 shows the state. At this time, the contact portion 11 of the contact member 11
d is in the released state, and the lock member 12 is moving downward.

As described above, in the camera with a barrier according to the present embodiment, when the taking lens barrel 3 is located in the movement path of the barrier, the movement of the barrier 2 in the closing direction is caused by the camera body. It is blocked by the lock protrusion 1f of No. 1. At that time, the contact member 1 is attached to the lens barrel 3.
Since only a slight biasing force of 1 acts on the lens drive motor 20, the braking force that prevents the movement of the barrier 2 hardly acts on the lens drive motor 20. Further, the force for moving the barrier 2 does not act on the internal mechanism, and the internal mechanism is protected.

Next, a camera with a lens barrier showing a second embodiment of the present invention will be described. FIG. 12 is a perspective view of the barrier applied to the camera of the above-described embodiment as seen from the back side. Of the constituent members on the side of the barrier 2,
The lock member 12 and the contact spring 1 of the first embodiment.
The structure of the member corresponding to 4 is different. However, the structures and functions of the other constituent members such as the contact member 11 of the barrier 2 and the camera constituent members such as the lens barrel 3 are exactly the same as those in the first embodiment, and the description thereof will be omitted. Also, the same members will be described with the same reference numerals.

In the present embodiment, the locking member 12 mounted on the barrier 21 for preventing the movement of the barrier is a member that performs a linear motion in the lock member 12 of the first embodiment, whereas the barrier 12 is a member. A sector gear 22 that rotates around a pin 21m that is planted in is applied. Further, a coil spring is not applied as the contact spring member,
A biasing force is applied by the plastics elastic portion 22c formed integrally with the sector gear 12.

In the camera of this embodiment constructed as described above, when the barrier 21 is pressed in the P direction, the contact force of the lens barrel 3 acts on the contact surface 11b, and the contact member 11 is pressed. Relatively retreat in the Q direction. Due to the backward movement, the sector gear 2 is passed through the lock gear 13.
2 rotates clockwise in FIG. The rotation causes the lock contact portion 22b to move upward. In this upward movement state, the lock protrusion 1f of the camera body 1 shown in FIG.
And the contactable position. Further, when the sector gear 22 is rotated, the contact member 11 is deformed due to the deformation of the elastic portion 22c.
Receives a biasing force in the P direction. The barrier opening / closing operation when the barrier 21 is attached to the camera body 1 is similar to that of the camera of the first embodiment.

As described above, according to the barrier of the camera of the present embodiment, by using the sector gear 22 as the locking means for blocking the movement of the barrier, the guide pin or the like arranged on the barrier becomes unnecessary, and the space is eliminated. This is an advantageous configuration. Further, since it is not necessary to dispose the contact spring separately, it is advantageous in terms of cost and space.

Next, a camera with a lens barrier showing a third embodiment of the present invention will be described. FIG. 13 is a perspective view showing an assembled state of the barrier applied to the camera of the above-described embodiment as seen from the back surface side. In the present embodiment, among the constituent members on the side of the barrier 32, the structures of the members corresponding to the contact member 11, the lock member 12, the lock gear 13, and the contact spring 14 of the first embodiment are different. There is. Particularly, in the present embodiment, the lock gear is not used,
A feature is that a drive direction conversion unit 37 described later is used. However, the structure and function of the other constituent members of the barrier 2 and the camera constituent members such as the lens barrel 3 are exactly the same as those in the first embodiment, and the description thereof will be omitted. Also, the same members will be described with the same reference numerals.

In the present embodiment, as shown in FIG. 13, a contact member 31 having a contact portion 31b with the lens barrel 3 is disposed on the barrier 32 slidably in the PQ direction. Has been done. The end portion 31c of the contact member 31 is fitted into the guide groove 32q that constitutes the drive direction changing portion 37. The drive direction changing portion 37 includes the guide groove 32q integrally formed on the barrier 32 and having a predetermined curvature, and the groove 32q.
A plurality of spheres 36 fitted into the
It is composed of a lid 35 for preventing it from falling off from q.
The spherical body 36 may be a roller-shaped member. In addition, the both ends of the guide groove 32q have contact members 3
The end 31c of No. 1 and the end 33a of the lock member 33, which will be described later, can enter by a predetermined amount.

The lock member 33 is a locking means for preventing the movement of the barrier, and the upper end portion thereof has a lock contact portion 33b which is a contact portion with the lock projection 1f of the camera body 1 shown in FIG. Is forming. Further, as described above, the end portion 33a thereof enters the groove 32q of the conversion portion 37 and is slidably supported in the R-S direction orthogonal to the P-Q direction. The lock member 33 is formed by the torsion spring 3
4 is urged in the R direction. Therefore, the biasing force of the torsion spring 34 is applied to the contact member 31 via the spherical body 36.
And is constantly urging the contact member 31 in the P direction.

In the barrier 32 of the camera of the present embodiment constructed as described above, when the contact surface 31b of the contact member 31 is pressed by the lens barrel 3, the end portion 31c moves in the groove 32q. Enter and move in the Q direction. The movement is transmitted to the end 33a of the lock member 33 through the sphere 36 and pushes it up in the S direction. In the moving state, the lock contact portion 33b at the upper end of the lock member 33 is located at a position where it can contact the lock projection 1f on the camera body 1 side.

Other operations related to opening and closing the barrier are the same as those of the camera of the first embodiment. that's all,
As described above, the barrier in the camera of this embodiment does not require a lock gear, and therefore the space for disposing the constituent members is very small, which is advantageous for downsizing the camera. Further, since the plurality of spheres 36 are used in the drive direction changing portion 37, the force is smoothly transmitted, and an unreasonable force does not act on the opening and closing of the barrier.

Next, a modified example of the drive direction changing portion in the barrier of the camera with a lens barrier showing the third embodiment will be described. FIG. 14 is a perspective view around the drive direction conversion portion of the above modification, and in this modification, the drive direction conversion portion 40 is a guide portion 32r integrally formed with one spherical body 39 and the barrier 32. And guide pins 32s, 32
It is composed of t and t. The contact member 38 that comes into contact with the lens barrel 3 is different from the contact member 31 of the third embodiment in the shape of the tip that enters the drive direction conversion portion 40. As shown in FIG. 14, the tip of the entry portion 38c of the abutting member 31 of the present modification has an inclined surface 38d for generating a force for lifting the spherical body 39 in the S direction. The lock member 33 has the same shape as that of the third embodiment and is movable in the R-S direction.

In the barrier of the present modification constructed as described above, when the contact member 38 is pressed by the lens barrel 3 in the Q direction, the spherical body 39 is pushed up in the S direction. Due to the action, the lock member 33 resists the torsion spring 34 and S
Move in the direction. Due to the movement, the lock abutment portion 33b of the lock member 33, as in the third embodiment, is
It is located at a position where it can come into contact with the locking projection 1f on the camera body 1 side.

The other opening / closing operations of the barrier are the same as those in the third embodiment. As described above, the barrier of the present modification has a simple structure because only one sphere 39 is used for the drive-direction changing section 40, which is advantageous in terms of space and cost. .

[0048]

As described above, in the camera with a lens barrier according to the present invention, when the photographing lens is located on the movement path of the barrier, the movement of the barrier in the closing direction is blocked by the locking means. Therefore, even if the barrier is blocked by the locking means while closing the barrier while the photographing lens is moving, the braking force that blocks the movement of the barrier hardly acts on the lens driving unit, resulting in excessive power consumption. Never be. In addition, a large force that prevents the barrier from moving does not act on the internal mechanism.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera with a lens barrier according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the camera shown in FIG. 1 with a barrier removed in a ready-to-shoot state.

FIG. 3 shows a barrier applied to the camera of FIG.
FIG. 6 is a perspective view seen from the inner surface side, which is the side opposite to the A direction in FIG.

4 is a cross-sectional view taken along the line BB of FIG. 1 in a state where the barrier of the camera of FIG. 1 is fully opened.

FIG. 5 is a main electric circuit diagram of a lens barrel drive section and an encoder section of the camera shown in FIG.

FIG. 6 is a general flowchart showing the operation of the camera of FIG. 1, particularly the operation of the taking lens barrel associated with the barrier opening / closing operation.

7 is a front view of the camera of FIG. 1 with a barrier fully opened and in a state of preparation for shooting.

8 is a front view of the camera of FIG. 1, which is in an initial state in which photographing has been completed and the barrier has been moved in the closing direction.

9 is a front view of the camera of FIG. 1 with the barrier further moved in the closing direction after the state of FIG.

10 is a front view of the camera in the state shown in FIG. 9 in which the lens barrel is retracted to a substantially retracted position, following the state shown in FIG. 9;

11 is a front view of the camera of FIG. 1 with the barrier completely closed after the state of FIG. 10;

FIG. 12 is a perspective view of the barrier applied to the camera with a lens barrier according to the second embodiment of the present invention, as viewed from the back surface side.

FIG. 13 is a perspective view of a barrier applied to a camera with a lens barrier according to a third embodiment of the present invention, viewed from the back surface side.

FIG. 14 is a perspective view of a drive direction changing portion in a modified barrier of the camera with a lens barrier according to the second embodiment of FIG. 13;

[Explanation of symbols]

2, 21, 32 ... Barrier 3 Lens barrel (holding member for taking lens) 12, 33 Lock member (locking means for preventing movement of barrier) 22 ……………… Sector gear (locking means to prevent barrier movement)

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 30, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

FIG. 3 is a perspective view of the barrier 2 in an assembled state as seen from the inner surface side opposite to the direction A in FIG. As shown in the figure, the barrier 2 has guide pins 2c for sliding an abutting member 11 to be described later in the left-right direction,
2d, guide pins 2g and 2f for sliding a lock member 12 described below in a vertical direction, a pin 2k pivotally supporting a lock gear 13 described below, and the abutment member 11
3, a U-shaped protrusion 2e for holding the contact spring 14 that applies a bias to the left is formed. One end of the contact spring 14 is designated by the contact member 11, and the other end has walls 2 e and 21 forming the protrusion 2 m (see FIG. 7).
It is installed by pressing it firmly in between and never falling.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

A screw gear 23a is fixed to the tip of the screw 23. The gear 23a
Engages with the pinion 21 attached to the rotary shaft of the drive motor 20. When the motor 20 is driven, the lens barrel 3 is driven back and forth in the optical axis direction. The lens barrel 3 is in the non-shooting state renormalized to collapsed position not <br/> interfere with the movement locus of the barrier 2, in the photographing state is fed to interfere outwardly and the movement locus of the barrier 2. In addition,
An encoder (not shown) other than the encoder 19 is interlocked with either the gear 23a or 21 to detect the focusing position of the lens barrel 3.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

Here, when the barrier is moved in the P direction (right direction) in FIG. 7 to close the barrier 2 after the photographing is finished, as shown in FIG. 8, the barrier detection switch 1c is turned off in the closing process. Become. The drive motor 20 (see FIG. 5) drives the lens barrel 3 so as to retract the lens barrel 3, and the lens barrel 3 starts to retract. However, since the operating speed of the barrier 2 is usually faster than the collapsing speed of the lens barrel 3, the operating speed of the barrier 2 shown in FIG.
A contact member 11 that moves integrally with the barrier 2 as shown in FIG.
The contact portion 11b comes into contact with the outer peripheral surface 3c of the lens barrel 3. In this initial state of contact, the lock gear 13 has not yet rotated, and the lock member 12 has not moved in the vertical direction.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

When the barrier 2 is further moved rightward, the state shown in FIG. 9 is obtained. In this state, the barrier 2 moves in the P direction while the contact surface 11b of the contact member 11 is still in contact with the outer peripheral surface 3c of the lens barrel 3, so that the contact member 11 moves toward the barrier 2. It moves relatively in the Q direction. Then, the lock gear 13 is rotated clockwise by the rack 11 a of the contact member 11. The rotation consequently pushes the lock member 12 upward. The lock contact portion 12 b of the lock member 12 is raised until the lock protrusion 1f and the abutting locations of the camera body 1 side. Furthermore,
The barrier 2 is in contact with the protruding portions 1f and the locking abutment portion 12 b abuts, more, does not move to the P direction, it is locked in that state.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction content]

[Figure 9]

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

Claims (1)

[Claims] 1. A camera in which a photographing lens is covered with a barrier in a non-photographing state, moves in such a manner that the barrier exposes the photographing lens in a photographing state, and the photographing lens is positioned within a movement locus of the barrier. And the barrier is retracted from the movement path along the optical axis of the taking lens, the photographing lens is moved along the movement axis of the barrier when it is located in the movement path along the optical axis of the lens. Camera with a lens barrier, characterized in that it has a locking means for preventing the movement of the barrier when the above condition is present, and for releasing the movement preventing state of the barrier when the taking lens comes out of the movement path of the barrier. .