JP2994523B2 - Camera with lens barrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having 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 A camera having a lens barrier incorporating a lens barrier that can be opened and closed has been proposed in various forms. For example, Japanese Patent Laid-Open No. 1-25
There is a camera with a lens barrier disclosed in Japanese Patent No. 5839 and Japanese Patent Application Laid-Open No. 1-288842. In this camera, if the lens barrier is moved from the open position to the closed position when the lens barrel is at the extended position protruding from the front of the camera, the lens barrier is in a semi-open position where the lens barrier does not interfere with the lens barrel. Locked and blocked. Further, the lens barrel is driven to the retracted position where the lens barrel is retracted from the front of the camera 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. Movement becomes possible.

[0003]

However, Japanese Patent Application Laid-Open Nos. 1-255839 and 1-28839 mentioned above.
In the camera with a lens barrier disclosed in Japanese Patent No. 842, the unlocking is performed in conjunction with the electric drive of the lens barrel. However, if a force is applied in the closing direction while the barrier is locked, the motor will , The load current increases, and power is wasted. Further, there is a possibility that the internal mechanism may be damaged and the lens barrel may stop halfway.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and can prevent interference between a lens barrel and a barrier due to a barrier closing operation by using a mechanism having a simple structure.
Moreover, it is an object of the present invention to provide a camera with a lens barrier that does not waste power of a driving motor or damage an internal mechanism.

[0005]

SUMMARY OF THE INVENTION A camera with a lens barrier according to the present invention includes a photographing lens movable between a photographing position and a storage position, and a photographing lens at an open position and a storage position exposing the photographing lens at the photographing position. A barrier that can be moved to a closed position covering the barrier , and a barrier that locks the barrier during the operation of moving the barrier from the open position to the closed position with a predetermined force to move the barrier toward the closed position. Locking means for temporarily blocking, and after the movement of the barrier is blocked, the locking of the locking means is released by once releasing the predetermined force, and the barrier is moved from the open position to the closed position in the direction from the open position to the closed position. characterized by comprising a releasing means for allowing the movement to.

[0006]

After the barrier is prevented from moving, the predetermined
Once the force is released, the locking of the locking means is released.
Movement from the open position to the closed position of the barrier is allowed
Is done.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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. Note that this figure is to fully open the burrs A second full coverage type movable body front in the lateral direction,
A state is shown in which the lens barrel 3 holding the photographing lens is extended to a photographing initial position, which is a photographing state. In addition,
In the present camera, based on the closing operation of the barrier 2, the lens barrel 3 is retracted to the retracted position in the non-photographing state. Camera of the above embodiment, the front of the camera unit, and, when described from the construction of the barrier mechanism, as shown in FIG. 1, the camera body 1, burrs A 2 which is slidably disposed in the front panel Guide groove 1 for supporting
a and 1b are formed in the upper part and the lower part so as to extend in the left-right direction.

On the front surface of the camera body 1, 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 disposed above the camera window 1. Is done. In addition, a photographing lens barrel 3 that can move back and forth in the direction of the optical axis O is disposed at the center. 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 collapsed position in the camera body 1 and furthermore, the barrier 2 displays a self-timer from the distance measuring light-receiving window 6. The window 9 is covered.

FIG. 2 is a perspective view showing a state where 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 of the camera. 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 based on the contact state of the contact pieces 1d and 1e. Note that the above-mentioned projection 1f and the barrier detection switch 1c, regardless open and closed positions in Bari A 2, always covered and will not be exposed.

A concave portion 1k provided on the front surface of the main body 1 is a member mounted on the barrier 2, and a tip of a contact member 11 which can contact the lens barrel 3 is slidable. Recess. By the abutment member 11 is fitted into the recess 1k, a camera front 1g and the front surface of the contact portion 11 b of the abutting member 11 forms the same plane,
The appearance is not uncomfortable. The small hole 1h provided at the upper part of the front surface of the camera body 1 is a ball hole that gives a click action of the barrier 2, and the click spring 15 and the click ball 16 are fitted therein. And when the barrier 2 is in the fully open or fully closed position,
Click recesses 2i, 2j disposed inside barrier 2
The ball 16 fits into the groove.

FIG. 3 is a perspective view showing the assembled state of the barrier 2 as viewed from the inner surface side opposite to the direction A in FIG. As shown in the figure, a guide pin 2c for sliding a contact member 11 described later in the left-right direction is provided on the barrier 2.
2d, guide pins 2g and 2f for vertically sliding a lock member 12 to be described later, a pin 2k for pivotally supporting a lock gear 13 to be described, and the contact member 11
In FIG. 3, a U-shaped projection 2e for holding the contact spring 14 for applying a bias in the left direction is formed. The one end of the contact spring 14 is indicated by the contact member 11 and the other end wall 2 e and 21 to form a protrusion portion 2 m (see FIG. 7)
It is firmly pushed in between and attached, and does not drop.

Further, the barrier 2 has engagement guide portions 2a and 2b with the camera body 1 so as to be slidably supported on the camera body 1 in the left-right direction. The guide portions 2a and 2b are slidably fitted into 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 projection 2h provided on the barrier 2 is a contact piece 1 of a barrier detection switch 1c provided on the camera body 1.
This is a projection for pressing e. When the barrier 2 is at the fully open position, the contact piece 1e is pressed, and the contact piece 1e is pressed.
e and the contact piece 1d are brought into contact with each other, and the barrier detection switch 1
c is turned on.

The recesses 2i and 2j in the form of depressions disposed on the upper inner surface of the barrier 2 are click depressions and cannot be observed from the outside. These click recesses 2i, the camera body 1 click ball 16 the upper portion of which is fitted into the small hole 1h is depressed to 2j, issued a click feeling, stop burrs A <br/> 2 in place. That is, the ball 16 is placed in the recess 2i.
If but fitted, Bali A 2 fully open position, if fitted ball 16 in the recess 2j, burr A is located respectively in the fully closed position.

The contact member 11, the lock contact member 12,
Pins 2c, 2 on which lock gear 13 is disposed on barrier 2
In order to prevent the pins 2c, 2f, 2k, etc. from falling off from the pins 2c, 2k, etc., a well-known technique, for example, as shown in FIG.

The contact member 11 is a member for detecting whether or not the lens barrel 3 is located on the path of movement of the barrier. The contact member 11 has pins 2c, 2d provided on the barrier 2 and elongate holes 11e. Are slidably fitted and movably held in the left-right direction. Then, the positioning is always performed in a state of being urged leftward in FIG. 3 by the urging force of the contact spring 14. The corresponding contact member 11 includes the rack 1
1a, a contact portion 11b capable of contacting the lens barrel 3, and a protrusion 11c for holding one end of the contact spring 14 are formed. One end of the contact spring 14 is
, And the other end of the contact spring 14 is supported by the U-shaped protrusion 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 barrier movement. An L-shaped tip of the lock member 12 has a camera-side lock projection 1f (FIG. 2) of the main body 1.
(See FIG. 2) is provided. Further, the barrier 2 has elongated holes 12c and 12d to be fitted with the pins 2g and 2f of the barrier 2, and is supported slidably in the vertical direction. Further, it also has a lock rack portion 12a, and the rack portion 12a is
Is engaged. As the lock gear 13 rotates, the lock member 12 moves up and down.

Since the contact member 11 is urged leftward as described above, if the contact portion 11b of the contact member 11 is in the released state, the contact member 11 moves leftward, The lock member 12 descends to the lowermost position. In this lowered position, 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).

When the lock member 12 is in the lowered state, the contact portion 11b on the end surface of the contact member 11 is
When the lock gear 13 is pressed rightward in FIG. 3 against the urging force of 4, the lock gear 13 is rotated counterclockwise, and the lock member 12 further moves upward. In this upward movement state, the lock contact portion 12b of the lock member 12 is located at a height at which the lock contact portion 12b can contact the lock protrusion 1f of the camera body 1 (see FIG. 9). Further, when the pressing force is released from the contact member 11, the contact member 11 returns 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 of FIG. 1 showing the fully opened state of the barrier. The lens barrel 3 holds a taking lens. It has a fitting hole 3a and a screw hole 3b, and is supported by the guide rod 25 and the screw 23 via the fitting hole 3a and the screw hole 3b, so that it can advance and retreat in the optical axis O direction. . The lens barrel 3 is provided with an encoder contact piece 24 for detecting the movement position of the lens barrel 3, and is also equipped with a lens shutter device (not shown).

The encoder 19 disposed 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 retracted state is detected by the ON signal 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 captured by a CPU 17 (see FIG. 5) described later.

A screw gear 23a is fixed to the tip of the screw 23, and the gear 23a
Are engaged with a pinion 21 attached to a rotation shaft of the drive motor 20. When the motor 20 is driven, the lens barrel 3 is driven forward and backward 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) different from the encoder 19 is linked with either the gear 23a or 21 to detect the focusing position of the lens barrel 3.

The state shown in FIG. 4 is a photographing preparation state, and the patterns 19 b and 19 c 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 a lens barrel driving section and an encoder section of the camera of this embodiment. Each operation of the camera is controlled by the CPU 17. The motor drive driver circuit 18 is controlled by the CPU 17 and drives the drive motor 20 to drive the lens barrel 3.
Is moved back and forth in the optical axis direction. The CPU 17 also includes a switch 19a for detecting the collapsed state of the lens barrel 3, an output signal of the photographing preparation position detection switch 19b, and a switch for detecting that the barrier 2 has been fully opened. An output signal, an output signal of a release switch 10a operated by the release button 10, and the like are input.

Next, a description will be given of a photographing operation including a barrier opening / closing operation of the camera having the above-described structure according to the present embodiment. 6, the operation of the camera, in particular, is a general flowchart showing the operation of the photographic lens barrel due to burrs A closing operation. Now, moving from the state where the barrier 2 is closed the barrier 2 by a manual operation in the opening direction, burrs A detection switch 1c is turned on when the substantially fully opened state. That is, the contact pieces 1d and 1e come into contact with each other, and the processing program by the CPU 17 starts. Then, step S1
, The CPU 17 sends a drive signal to the lens drive driver circuit 18 and drives the motor 20 so that the photographing lens barrel 3 retracted in the camera is extended to the photographing preparation position. In step S2, the CPU 17 checks whether the photographing lens has reached the photographing preparation position by driving the motor 20. When the switch 19b detects that the photographing lens barrel 3 has reached the photographing preparation position,
In step S4, the driving of the motor 20 is stopped.

Thereafter, the flow advances to step S4 to check with the switch 10a whether or not the release button 10 has been operated. When the switch 10a is turned on,
Proceeding to step S5, a 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 moved in the closing direction by manual operation, the process proceeds to step S7 at the initial time, and the lens barrel 3 is driven in the retracting direction.

In step S8, it is checked whether the lens is in the lens retracted state based on the output signal of the encoder 19. If it is determined that the lens barrel 3 is in the collapsed state, the process proceeds to step S9, in which the driving of the lens barrel 3 is stopped, and this routine ends.

Next, the operation of the lens barrel 3 and the barrier 2 associated with the opening and 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, and shows a state in which a part of the barrier 2 is broken so that the operation state of each member can be understood.

FIG. 7 is a front view of the camera in a state in which the barrier 2 has been fully opened and the camera has been ready for shooting. In the state of FIG. 7, the contact piece 1 Bali A detection switch 1c
e, 1d are have turned on state by the projection 2h of Bali A 2, and at any time can execute the shot. Therefore,
The lens barrel 3 is also in a state where it can be extended by focusing. The contact member 11 on the side of the barrier 2 is urged rightward by the contact spring 14 and is in the protruding position, but the pin 2d and the guide groove 11e are in contact, and the contact of the tip of the contact member 11 is The contact portion 11b is not in contact with the lens barrel 3.

At this point, if the barrier is moved in the P direction (right direction) in FIG. 7 in order to close the barrier 2 in order to close the barrier 2, 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 to retract, and the lens barrel 3 starts retracting. However, since the operating speed of the barrier 2 is usually faster than the retracting speed of the lens barrel 3, FIG.
Abutment member 11 that moves integrally with barrier 2 as shown in FIG.
Is brought into contact with the outer peripheral surface 3c of the lens barrel 3. In this contact initial state, the lock gear 13 has not yet rotated, and the lock member 12 has not yet 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 remains in contact with the outer peripheral surface 3c of the lens barrel 3, so that the contact member 11 It relatively moves in the Q direction. Then, the lock gear 13 is rotated clockwise by the rack 11a of the contact member 11. As a result, the rotation pushes the lock member 12 upward. Then, the lock contact portion 12b of the lock member 12 moves up to a position where the lock contact portion 12b can contact the lock protrusion 1f on the camera body 1 side. Furthermore,
The barrier 2 comes into contact with the protrusion 1f and the lock contact portion 12b, and does not move further in the P direction, and is locked in that state. Move the barrier 2 in the P direction in this state
However, the lock state is maintained by maintaining this manual operation force.
Is inevitably maintained .

As described above, the contact surface 11b is formed on the outer peripheral surface 3c.
The movement of the contact member 11 detects that the lens barrel 3 is located in the movement trajectory of the barrier 2 due to the contact of the barrier 2, and restricts the movement of the barrier 2 in the direction of the lens barrel 3. . Of course, during this time, the lens barrel 3 continues to be retracted. The outer peripheral surface 3c of the lens barrel 3 is slidingly pressed against the contact surface 11b of the contact member 11.
However, the force in the P direction for urging the contact member 11 is only the urging force of the contact spring 14 and is a small force of several g, and has almost no influence on the lens retracting operation.

This state continues for a while, and the closing of the barrier 2 is performed.
Once the operation force in the direction is released and the lens barrel 3 reaches near the retracted position, the state shown in FIG. 10 is obtained. However, if a force is continuously applied to this barrier in the P direction in the state of FIG. 9, the lock member 12 does not fall downward, and the lock contact portion 1
The abutment and locking of 2b and the lock projection 1f are maintained, and this locked state continues. By releasing this force, the locking is released, and 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 front surface 3d of the lens barrel by the urging force of the contact spring 14.
Due to the protrusion of the contact member 11, the rack 11a rotates the lock gear 13 counterclockwise, and the lock contact portion 12b of the lock member 12 moves to the lock protrusion 1 on the camera body 1 side.
f, the barrier 2 is again in a state where it can 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 11b 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 from the fully closed state in FIG. 11 until it stops in the Q direction, the barrier detection switch is turned on by 2h, and the lens barrel 3 is connected to the camera body 1
Can protrude 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, the photographing lens barrel 3 is mounted on the barrier.
When located in the moving path in A is moved in the closing direction of the burr A 2 is prevented by the locking protrusion 1f of the camera body 1. At this time, the contact member 1 is attached to the lens barrel 3.
Since only a small urging force acts on the lens drive motor 20, a braking force for preventing 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 according to a second embodiment of the present invention will be described. FIG. 12 is a perspective view of an assembled state viewed from the back surface side of the barrier applied to the camera of the above embodiment. Among the constituent members on the barrier 2 side,
The lock member 12 of the first embodiment and the contact spring 1
The structure of the member corresponding to No. 4 is different. However, the structure and function of the other components such as the contact member 11 of the barrier 2 and the camera components such as the lens barrel 3 are completely the same as those of the first embodiment, and a description thereof will be omitted. Further, the same members will be described with the same reference numerals.

In this embodiment, the lock member 12 of the first embodiment is a member that performs a linear movement as the locking means for preventing the movement of the barrier, which is mounted on the barrier 21. A sector gear 22 that rotates around a pin 21m implanted in the center is applied. Also, a coil spring is not applied as the contact spring member,
An urging force is applied by a plastics elastic portion 22c formed integrally with the sector gear 12.

In the camera of the present embodiment having the above-described structure, when the camera is pressed in the direction P to close the barrier 21, the contact force of the lens barrel 3 acts on the contact surface 11b, and the contact member 11 Retreats relatively in the Q direction. Then, the sector gear 2 is moved through the lock gear 13 by retreating.
2 rotates clockwise in FIG. The rotation causes the lock contact portion 22b to move upward. In this upward movement state, the lock projection 1f of the camera body 1 shown in FIG.
And the contactable position. In addition, when the sector gear 22 is rotated, the elastic member 22c is deformed, so that the contact member 11 is rotated.
Receives a biasing force in the P direction. The operation of opening and closing the barrier 21 when the barrier 21 is mounted on the camera body 1 is the same as that of the camera of the first embodiment.

As described above, according to the barrier of the camera of the present embodiment, the use of the sector gear 22 as the locking means for preventing the movement of the barrier eliminates the need for guide pins and the like disposed on the barrier. This is also advantageous in terms of hardware. Further, since there is no need to separately provide a contact spring, it is advantageous in terms of cost and space.

Next, a camera with a lens barrier according to a third embodiment of the present invention will be described. FIG. 13 is a perspective view showing the assembled state of the barrier applied to the camera of the above embodiment, as viewed from the back side. In the present embodiment, among the constituent members on the barrier 32 side, 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. I have. In particular, the thing of this embodiment does not use the lock gear,
It is characterized in that a driving direction converter 37 described later is used. However, the other constituent members of the barrier 2 and the structure and function of the camera constituent members such as the lens barrel 3 are exactly the same as those in the first embodiment, and a description thereof will be omitted. Further, the same members will be described with the same reference numerals.

In this embodiment, as shown in FIG. 13, a contact member 31 having a contact portion 31b with the lens barrel 3 is slidably provided in the PQ direction on the barrier 32. Have been. The end 31c of the contact member 31 is fitted in a guide groove 32q constituting the driving direction changing part 37. The driving direction conversion unit 37 includes the guide groove 32q having a predetermined curvature formed integrally with the barrier 32, and the groove 32q.
A plurality of spheres 36 fitted in the
and a lid 35 for preventing the cover 35 from dropping off from q.
The sphere 36 may be a roller-shaped member. Also, both ends of the guide groove 32q are in contact with the contact member 3
One end 31c and an end 33a of a lock member 33 described later can enter by a predetermined amount.

The lock member 33 is a locking means for preventing barrier movement, and has a lock contact portion 33b whose upper end serves as a contact portion with the lock protrusion 1f of the camera body 1 shown in FIG. Has formed. Further, as described above, the end portion 33a enters the groove 32q of the conversion section 37, and is slidably supported in the RS direction orthogonal to the PQ direction. The lock member 33 is provided with the torsion spring 3.
4 urged in the R direction. Therefore, the urging force of the torsion spring 34 is applied to the contact member 31 via the sphere 36.
, And constantly urges the contact member 31 in the P direction.

In the barrier 32 of the camera according to the present embodiment having the above-described configuration, when the contact surface 31b of the contact member 31 is pressed by the lens barrel 3, the end 31c moves through the groove 32q. It moves in the Q direction. The movement is transmitted to the end 33a of the lock member 33 via the sphere 36, and is pushed 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 the lock contact portion 33b can contact the lock projection 1f on the camera body 1 side.

The other operations related to the opening and closing of the barrier are the same as those of the camera of the first embodiment. that's all,
As described above, since the barrier in the camera of the present embodiment does not require a lock gear, the space for arranging the components is very small, which is advantageous for miniaturization of the camera. Further, since a plurality of spheres 36 are used for the drive direction conversion unit 37, the force is smoothly transmitted, and no excessive force acts on the opening and closing of the barrier.

Next, a description will be given of a modification of the driving direction converter in the barrier of the camera with a lens barrier according to the third embodiment. FIG. 14 is a perspective view around the drive direction conversion unit of the above-described modified example. In this modified example, the drive direction conversion unit 40 includes a single sphere 39 and a guide part 32 r formed integrally with the barrier 32. And guide pins 32s, 32
and t. The contact member 38 that contacts 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 unit 40. As shown in FIG. 14, the distal end of the entry portion 38c of the contact member 31 of this modification has an inclined surface 38d for generating a force for lifting the sphere 39 in the S direction. The lock member 33 has the same shape as that of the third embodiment, and is movable in the RS direction.

In the barrier of the present modified example configured as described above, when the contact member 38 is pressed in the Q direction by the lens barrel 3, the sphere 39 is pushed up in the S direction. By the action, the lock member 33 is opposed to the torsion spring 34 by S
Move in the direction. By the movement, the lock contact portion 33b of the lock member 33 becomes similar to that of the third embodiment.
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 operation of opening and closing the barrier is the same as that of the third embodiment. As described above, the barrier of the present modification has a simple configuration because only one sphere 39 is used for the drive direction conversion unit 40, and is advantageous in terms of space and cost. .

[0048]

[Effect of the Invention] lens barrier camera with the present invention as described above, when the photographic lens is located in the movement path of the burr A is moved in the closing direction of the burr A is prevented by the locking means Therefore, even if the barrier is closed by the locking means to close the barrier while the photographing lens is moving, a braking force for preventing the movement of the barrier acts on the lens driving unit, and power consumption is reduced. Don't be too big. Also, a large force for preventing the movement of the barrier does not act on the internal mechanism.

[Brief description of the 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 in a photographable state with a barrier removed.

FIG. 3 shows a barrier applied to the camera of FIG. 1;
FIG. 3 is a perspective view seen from the inner surface side opposite to the direction A in FIG.

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 driving unit and an encoder unit of the camera of FIG. 1;

[6] the operation of the FIG. 1 camera, general flowchart showing the operation of the photographic lens barrel due to burrs A closing operation.

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

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

FIG. 9 is a front view of the camera of FIG. 1 in a state where the barrier is further moved in the closing direction, following the state of FIG. 8;

FIG. 10 is a front view of the camera of FIG. 1 in a state where the lens barrel is retracted to a substantially collapsed position, following the state of FIG. 9;

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

FIG. 12 is a perspective view of a barrier applied to a camera with a lens barrier according to a second embodiment of the present invention, 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 driving direction conversion unit in a modified example of the 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 (member holding photographing lens) 12, 33 ...... Lock member (locking means for preventing movement of the barrier) 22 Sector gear (locking means for preventing barrier movement)

Claims (5)

(57) [Claims] 1. A photographing lens movable between a photographing position and a storage position, a barrier movable between an open position exposing the photographing lens at the photographing position and a closed position covering the photographing lens at the storage position. Locking means for locking the barrier during the operation of moving the barrier from the open position to the closed position with the force of the barrier to temporarily prevent movement in the closed position direction; After the movement is prevented, the predetermined force is once released to release the locking of the locking means, and a release means for allowing the barrier to move from the open position to the closed position is provided. A camera with a lens barrier. 2. A photographing lens movable between a photographing position and a storage position, a barrier movable between an open position exposing the photographing lens at the photographing position and a closed position covering the photographing lens at the storage position. Detecting means for detecting the movement of the barrier when trying to move the barrier from the open position to the closed position with the force of; and taking the photographing lens from the photographing position to the storage position based on the output from the detecting means. A photographing lens driving unit for moving the photographing lens from the photographing position to the storage position when the photographing lens is in a movement locus of the barrier; and a closing position of the barrier. The movement in the direction is temporarily locked, and when the taking lens is retracted from the movement locus of the barrier, the barrier is moved to the closed position by once releasing the predetermined force. A camera with a lens barrier, comprising: a lock mechanism that allows: 3. A camera with a lens barrier in which a photographing lens is covered with a barrier in a non-photographing state, and the barrier moves so as to expose the photographing lens in a photographing state, and the photographing lens is positioned within a movement locus of the barrier. A driving means for moving the photographing lens out of the movement locus of the barrier with the manual operation movement of the barrier in the closing direction; and during operation of the driving means, the photographing lens is moved within the movement locus of the barrier. In order to prevent the collision between the barrier and the photographing lens, the movement of the barrier is stopped halfway, and even if the photographing lens retreats outside the movement locus of the barrier, the moving operation is not performed. A locking means for keeping the barrier from being moved when the continuation is continued, a camera with a lens barrier. 4. A camera with a lens barrier in which a photographing lens is covered by a barrier in a non-photographing state, the barrier moves so as to expose the photographing lens in a photographing state, and the photographing lens is positioned within a movement locus of the barrier. A detecting member for detecting whether or not the photographing lens is located within the movement locus of the barrier; and a detecting member which is displaced in conjunction with the detection means and indicates that the photographing lens is within the movement locus of the barrier. First locking means capable of being located in one state and a second state indicating that the taking lens is not within the movement locus of the barrier; and the first locking means for preventing movement of the barrier . A second locking means engageable with one locking means, and wherein the photographing lens is moved while the barrier is being manually moved inward in the photographing lens movement locus. When it is located within the movement trajectory of the barrier, the detecting means detects that, the first locking means is positioned in the first state, and the first locking means and the A camera with a lens barrier, characterized in that the barrier is prevented from moving by engaging with a second locking means, and the engagement is maintained if the manual operation is continued. 5. A barrier which is located outside the movement locus of the photographing lens when photographing, and which is located within the movement locus of the photographing lens when non-photographing, and covers the photographing lens. A shooting lens that shifts from a shooting state in which the lens is extended to the outside of the camera body to a non-shooting state in which the lens is advanced into the camera body, when the operation of moving the barrier in the closing direction is performed. In order to prevent the movement of the barrier when the photographing lens is within the movement locus, the movement preventing means provided on the camera body side and the barrier side, and when the operation of moving the barrier is performed, When the taking lens is within the barrier trajectory, the spring means is energized by the contact between the barrier and the taking lens, and the barrier is operated in the closing direction. When the photographing lens is within the movement locus of the barrier, the blocking action of the movement preventing means operates. Thereafter, the operation is continued regardless of whether the photographing lens is within the movement locus of the barrier. When the operation is stopped, the blocking action of the movement blocking means is continued, and when the operation is interrupted, the blocking of the movement blocking means is released by the accumulated force of the spring means,
A camera with a lens barrier, characterized in that the barrier is movable.