JP3544775B2 - Camera with retractable zoom lens barrel - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photographing optical system capable of continuously changing a focal length, and a retractable zoom lens barrel that immerses all or a part of a zoom photographing optical system in a camera body when the camera is carried or not used. Depending on the focal length at that timeViewfinder viewNeed to change continuouslyRuffFinder opticsSystemIt is related to improvement of the equipped camera.
[0002]
[Prior art]
In cameras equipped with a zoom-type photographing optical system that can continuously change the focal length, a finder optical system, and a strobe device, the size of the finder field of view and the irradiation angle of the flash means are continuously adjusted according to the focal length at each time. Must be changed.
For this reason, this type of camera requires a mechanism for interlocking the drive mechanism of the zoom-type photographing optical system, the field-of-view changing mechanism of the finder optical system, and the irradiation angle changing mechanism of the strobe device. For example, an interlocking mechanism used in a camera disclosed in Japanese Patent Application Laid-Open No. 63-2030 is one example.
[0003]
In the camera disclosed in this publication, a driving mechanism of a zoom-type photographing optical system, a field-of-view changing mechanism of a finder optical system, and an irradiation angle changing mechanism of a strobe device are interlocked by an interlocking mechanism having the following structure. I have.
That is, a single cam plate driven by a drive mechanism of a zoom-type photographing optical system has a field-of-view changing cam groove (magnification-variable cam groove in Japanese Patent Laid-Open No. H11-27171) for changing the viewfinder field of view and an irradiation angle changing for changing the irradiation angle of a flash device. A cam groove (in the publication, a strobe cam groove) is provided, and a driven pin that fits into the field-of-view changing cam groove is provided on the field-of-view changing mechanism side. Pins are provided respectively.
Then, when the zoom type photographing optical system is zoomed, the field-of-view changing mechanism and the irradiation angle-changing mechanism are operated via the respective driven pins by the cam action of the field-of-view changing cam groove and the irradiation angle changing cam groove. In this case, the viewfinder field and the stroboscopic illumination angle are made to correspond to the respective focal lengths.
[0004]
[Problems to be solved by the invention]
However, this conventional structure of the interlocking mechanism includes a camera having a retractable zoom lens barrel that immerses all or a part of the zoom type photographing optical system in the camera body when the camera is carried or not used. There is a major disadvantage that it cannot be used.
That is, in a camera equipped with a zoom-type photographing optical system, the photographing optical system projects greatly from the camera body in the optical axis direction at the time of photographing. In general, all or a part of the optical system is configured to be immersed (collapsed) to a storage position set in the camera body. In this case, the storing operation of the photographing optical system in the camera body is generally performed as an extension of the zooming operation.
[0005]
On the other hand, since the viewfinder optical system and strobe device do not need to be moved in the optical axis direction, naturally, the field-of-view changing mechanism and the irradiation angle changing mechanism have a structure that does not move in the optical axis direction in the camera body. Will be configured as
However, the conventional structure of the interlocking mechanism has a collapsible zoom lens barrel because the drive mechanism of the zoom-type photographing optical system is directly linked to the field-of-view changing mechanism and the irradiation angle changing mechanism. Assuming that this conventional interlocking mechanism is applied to a camera, a major problem arises in that a finder optical system or a strobe device that does not originally need to be moved in the optical axis direction must be moved in the optical axis direction.
[0006]
In this case, if the finder optical system and strobe device are configured not to move in the optical axis direction, not only will the view changing mechanism and the irradiation angle changing mechanism become complicated, but also the installation space for both mechanisms will increase and the camera This results in an increase in the size.
On the other hand, in order to avoid such an increase in the size of the camera, for example, in the case of a camera using a cylindrical cam as a drive mechanism of a zoom-type photographing optical system, the cam groove formed in the cylindrical cam extends over 360 degrees or more. It becomes necessary to form, and molding becomes difficult. Further, if the cam groove is controlled to 360 degrees or less, the pressure angle of the cam rises and the operation during zooming becomes heavy.
[0007]
The present invention has been made in view of such circumstances, and an object thereof is to provide a retractable zoom lens barrel that immerses all or a part of a zoom-type photographing optical system in a camera main body. Depending on the occasional focal lengthViewfinder field of viewOptical system driving means (viewfinder field changing means) which need to continuously change)Camera with a zoom function within the specified zoom range.Viewfinder optical system driveMeans to retract the lens barrel when the lens barrel is retracted (collapsed).Viewfinder optical system driveNot to be transmitted to the means,Viewfinder optical system driveA retractable zoom mirror that eliminates unnecessary driving (operation) of the means, reduces energy consumption, reduces the amount of operation force, and narrows the operation space, and also eliminates the movement of the finder image during the focusing operation. An object of the present invention is to provide a camera having a torso.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 isBy rotating the lens barrel drive member,A photographing optical system having a variable power lens group capable of continuously changing the focal length,
A photographing optical system driving unit having a focal length changing region for continuously changing the focal length of the photographing optical system, and a storage operation region set outside the focal length changing region;
When the focal length of the photographing optical system is changed, the finder visual field is configured to be continuously changeable according to the focal length at that time.Field of viewVariable magnificationformulafineAnd,
A camera equipped with a retractable zoom lens barrel having
The photographing optical system driving means,
A drive transmission surface is provided rotatably with respect to the fixed portion, and is formed so as to be rotationally displaced with a rotation operation of the lens barrel drive member.fineDa driveMovementWith the components,
The field-of-view variable magnification finder is
Variable magnification finder optical systemWhen,
Viewfinder optical system driving meansAnd,
The finder optical system driving means,
A finder cam member for driving the zoom finder optical system,
A turning power receiving boss comprising a projecting portion projecting from the finder cam member and engaging with the drive transmission surface;
In the focal length change area, The drive transmission surface and the turning power receiving boss,Interlock between the two driving meansTo be engagedIn the storage operation area,The rotation of the finder cam member is stopped, and the drive transmission surface is connected to the power receiving boss by the two driving means.So that they are not linkedUnattachedIt is characterized in that it is configured to be kept in a state.
[0009]
The invention according to claim 2 isIn the storage operation area, the rotation of the finder cam member is stopped by bringing the rotation power receiving boss into contact with a rotation restricting portion formed on the fixing portion.It is a feature.
[0010]
The invention described in claim 3 is:The finder cam member is provided with an urging force in a direction in which the rotational power receiving boss presses the drive transmission surface of the finder driving member by the urging means.It is a feature.
[0012]
[Action]
As described above, the photographing optical system capable of continuously changing the focal length, the retractable zoom lens barrel that immerses all or a part of the zoom-type photographing optical system in the camera body, and the focal length at each time In response to theViewfinder field of viewNeed to be changed continuously.Variable magnificationfineDaEquippedBookThe camera according to the invention includes a photographing optical system driving unit.Change focal lengthIn the region, it operates so that the focal length of the photographing optical system can be continuously changed.Change focal lengthSet outside the areaStorageIn the operation region, the operation is performed so that the retractable operation of the retractable zoom lens barrel can be performed.
[0013]
In the focal length change area, The drive transmission surface and the turning power receiving boss,Interlock between the two driving meansTo be engagedIn the storage operation area,The rotation of the finder cam member is stopped, and the drive transmission surface is brought into contact with the power receiving boss by the two driving means.So that they are not linkedUnattachedActs to keep the condition.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
DepartureMing isAs shown in FIG. 7 and FIG. 8, at least the zoom ratio defined by the focal length at the wide-angle end (hereinafter simply referred to as “wide-angle end”) and the focal length at the telephoto end (hereinafter simply referred to as “telephoto end”). A zoom-type photographing optical system (not shown) having an area, and a retractable zoom lens barrel L incorporating the photographing optical system(Hereinafter, it may be abbreviated simply as “lens barrel L”)And a camera body B for holding the retractable zoom lens barrel L in a fully retracted or semi-retracted state, and continuously setting values such as an area range and an angle range according to the focal length at that time. The camera is configured as a camera equipped with a retractable zoom lens barrel having various functional units that need to be changed, for example, various functional units such as a finder optical system, a flash unit, and a photometric unit.
[0015]
In this case, when the retractable zoom lens barrel L is carried or not used, as shown in FIG. 7, the retractable zoom lens barrel L is completely or semi-submerged at the retracted position set in the camera body B. As shown in FIG. 8, the lens barrel is held as a lens barrel having a retractable mechanism (not shown) that can be pulled out from the retracted position to the storage start position in front of the camera body B during photographing or standby. .
That is, the pulling-out operation and the retracting operation (storage operation) of the lens barrel L are, for example, the movement in the optical axis direction between the retracted position and the storage start position while expanding and contracting its own length in the optical axis direction. Become.
[0016]
In the illustrated example, the storage start position of the lens barrel L is set as a position when the imaging optical system is at the wide-angle end. Therefore, the storage start position is the zooming start position as it is, and the zooming operation in the zooming area is performed as a continuous operation after the lens barrel L reaches the storage start position.
In addition,Ming isFor example, the camera is configured as a camera having a retractable zoom lens barrel having a field-of-view changing type finder F provided on the upper part of the camera body B as various functional means.
[0017]
In this case, the visual field changing operation of the visual field changing type finder F is performed by, for example, moving the mechanically configured visual field frame or lens to the position of the visual field range corresponding to the focal length at that time according to the focal length at that time. It is configured to be performed by a change mechanism (not shown). The collapsible mechanism of the lens barrel and the view change mechanism of the finder are each configured as a mechanism having an appropriate structure known per se.
In FIGS. 1 and 2, reference numeral 1 denotes a variable-magnification and barrel housing driving member (hereinafter, referred to as a driving member) provided so as to be able to reciprocate clockwise and counterclockwise around the optical axis of the photographing optical system. , Simply referred to as a “lens barrel driving member”, and is configured to be reciprocally rotated by, for example, a pulse motor control known per se.
[0018]
In this case, the zooming operation from the wide-angle end to the telephoto end is performed by rotating the lens barrel driving member 1 counterclockwise from the storage start position of the lens barrel L (the position at the wide-angle end). The zooming operation from the zoom position to the wide-angle end is performed by rotating the lens barrel driving member 1 clockwise from the position at the telephoto end toward the storage start position of the lens barrel L. Therefore, the zooming operation for realizing the respective focal lengths within the zooming region is also performed in accordance with such an operation in the reciprocating direction.
[0019]
On the other hand, the retracting operation of the lens barrel L is performed by rotating the lens barrel driving member 1 by a predetermined amount clockwise from the storage start position to the retracted position, and the pulling out operation of the lens barrel L is performed by the lens barrel driving member. 1 is rotated by a predetermined amount in the counterclockwise direction from the retracted position to perform the respective operations.
On the outer peripheral portion of the lens barrel driving member 1, the lens barrel driving member 1 is required to perform a revolving angle and a collapsing operation of the lens barrel L necessary to realize a focal length within the zoom range. Angle range in which the driving force from the lens barrel driving member 1 can be transmitted to the finder driving gear 5 described later (hereinafter, referred to as a “driving force transmission angle range”). ) To form the rack portion 1a.
[0020]
Reference numeral 2 denotes an idler gear provided so as to mesh with the rack portion 1a of the lens barrel driving member 1. For example, a fixing portion of the camera body BTo 3It is rotatably supported by the implanted shaft 4.
Note that a rotation restricting portion 3a having a structure capable of forcibly stopping the rotation of the finder cam member 7, which will be described later, is formed in a part of the fixed portion 3. The position 3a is a wide-angle end position (also a storage start position) of the magnification range as described later.
[0021]
5 is a lens barrel driving member 1 through the idler gear 2.Always rotateThe finder drive gear is provided so as to be interlocked with, and is rotatably provided on, for example, the fixed portion 3 by a shaft 5b implanted on the left side surface 5a (in FIG. 2). An arc groove 6 having a predetermined depth is formed in, for example, a right side surface 5c of the finder drive gear 5.
The arc groove 6 is formed over an angle range (within 360 °) in which the driving force transmission angle range of the lens barrel driving member 1 described above can be secured with a margin. Then, one of the groove ends has a finder cam member to be described later.7, And the other end of the groove is set as a margin side end surface 6b.
[0022]
Reference numeral 7 denotes a finder cam member for changing the finder field of view to a size corresponding to the focal length at each time, and a cam shaft provided on the fixed portion 3 and coaxially with the implantation shaft 5b of the finder drive gear 5. 8 rotatably supported. Then, by an appropriate urging means (not shown) such as a torsion spring, for example,4Is configured such that a biasing force in the clockwise direction is always applied. In the following description, this urging means will be referred to as clockwise urging means.
The viewfinder cam member 7 includes4As shown in FIG. 5, a turning power receiving boss 7a that projects loosely into the arc groove 6 of the finder driving gear 5 is provided in a protruding manner.
[0023]
The turning power receiving boss 7a has a shape or a structure such that an engagement side surface facing the finder drive gear 5 can engage with the drive transmission surface 6a of the circular arc groove 6 and the rotation restricting portion 3a of the fixed portion 3, respectively. It will be formed as a protruding part having.
Further, on the outer peripheral surface of the finder cam member 7, there is provided, for example, a cam portion 7b having two end surface cams 7c and 7d which are respectively engaged with the field-of-view changing members 9 and 10 to be described later and having an equal width.
In the illustrated example, the two end cams 7c and 7d are formed so that the cam amount with respect to the rotation angle of the finder cam member 7 is the same value. However, depending on the structure of the finder field size changing mechanism, it may be necessary. Accordingly, the cam amounts of the two end cams 7c and 7d can be set to different values.
[0024]
Reference numerals 9 and 10 denote field changing members for changing a finder field frame or a lens (both not shown) so as to be adapted to the finder field according to the focal length at each time. The lower end of the other field-of-view changing member 10 is configured to be in contact with one end cam 7c and the other end cam 7d.
Further, the two visual field changing members 9 and 10 are also configured to be urged by appropriate urging means so that they can come into pressure contact with the corresponding end face cams 7c and 7d.
[0025]
Next, the operation of the camera according to the illustrated embodiment will be described in the case where the photographing optical system is zoomed from the telephoto end to the wide-angle end, the lens barrel L is moved to the storage start position, and then the lens barrel L is collapsed to the collapsed position by the continuous operation. Will be described as an example.
The state shown in FIG. 4 is a state when the photographing optical system realizes the telephoto end. In this state, the lens barrel driving member 1 stops at the telephoto end position in the zooming range, and the finder drive gear 5 also stops at a position corresponding to the telephoto end position (telephoto end corresponding position).
On the other hand, the finder cam member 7 to which the urging force is constantly applied from the clockwise urging means is provided in the circular groove 6 of the finder drive gear 5 in which one side surface of the turning power receiving boss 7a is located at a position corresponding to the telephoto end. The state of being pressed against the drive transmission surface 6a is maintained.
[0026]
When the finder cam member 7 is in this state, the field-of-view changing members 9 and 10 use the two end cams 7c and 7d of the finder cam member 7 so that the field of view of the field-of-view changing finder F corresponds to the focal length at the telephoto end. The position or the posture that realizes the adjusted size is maintained.
When the lens barrel driving member 1 is rotated clockwise by an arbitrary amount in such a state, the rotating power is transmitted to the finder driving gear 5 via the engagement between the rack portion 1a and the idler gear 2. Therefore, the finder drive gear 5 rotates clockwise, and accordingly, the drive transmission surface 6a of the arc groove 6 is simultaneously rotationally displaced clockwise from the position corresponding to the telephoto end in FIG.
[0027]
At this time, the finder cam member 7 is integrated with the finder drive gear 5 while maintaining the pressure contact state between the engagement side surface of the turning power receiving boss 7a and the drive transmission surface 6a of the arc groove 6 by the urging force of the clockwise urging means. As a result, it rotates clockwise.
Accordingly, the two end cams 7c and 7d of the finder cam member 7 are also rotationally displaced clockwise to realize the finder visual field corresponding to the focal length at that time from the telephoto end corresponding position. (See FIG. 5).
[0028]
Further, if the lens barrel driving member 1 continues to rotate in the clockwise direction, the engaging side surface of the rotation power receiving boss 7a of the finder cam member 7 will eventually come into contact with the rotation restricting portion 3a of the fixed portion 3. Then, the finder cam member 7 is forcibly stopped from rotating in the clockwise direction at the contact position with the rotation restricting portion 3a (see FIG. 6).
Accordingly, the two end cams 7c and 7d are also stopped from being displaced at the contact position with the rotation restricting portion 3a, and the view changing members 9 and 10 realize the viewfinder view corresponding to the focal length at this time. Will stop at the position.
[0029]
Therefore, if the contact position between the engagement side surface of the turning power receiving boss 7a and the rotation restricting portion 3a is set so as to be the wide-angle end position and the storage start position of the zooming range of the photographing optical system, the telephoto is obtained. The zooming operation from the end ends at this contact position.
By the way, when photographing is stopped and the retractable zoom lens barrel L is stored, the lens barrel driving member 1 is further rotated clockwise in FIG. 1 by a predetermined amount in this state.
[0030]
When such a rotation operation is performed, the drive transmission surface 6a of the circular arc groove 6 rotates in a direction away from the engagement side surface of the rotation power receiving boss 7a, so that the finder cam member 7 is moved to the rotation restricting portion 3a. Only the finder drive gear 5 starts to rotate clockwise again from the position corresponding to the contact position with the rotation restricting portion 3a, while being stopped at the contact position.
Therefore, the photographing optical system moves toward the retracted position while shortening its length in the optical axis direction together with the retractable zoom lens barrel L by this clockwise rotation, and finally from FIG. The state shifts to the collapsed state shown in FIG.
[0031]
At this time, as described above, the clockwise rotation of the lens barrel drive member 1 from the wide-angle end position of the zoom range to the retracted position is not transmitted to the visual field change members 9 and 10. The field of view of the field-of-view changing type finder F is maintained at a size corresponding to the focal length at the wide-angle end. That is, during the retracting operation of the lens barrel L, the field of view of the field-of-view changing type finder F is kept immobile.
On the other hand, the operation for pulling out the lens barrel L from the retracted position to the storage start position (also the wide-angle end position) and the operation for zooming from the wide-angle end position to the telephoto end are performed by the lens barrel driving member 1 described above. The operation is in the opposite direction to the operation.
[0032]
That is, when pulling out the lens barrel L, the lens barrel driving member 1 is rotated counterclockwise to the storage start position. At this time, when the drive transmitting surface 6a of the arc groove 6 rotates to the position of the rotation restricting portion 3a of the fixed portion 3, the finder cam member stopped at the rotation restricting portion 3a by the urging force of the clockwise urging means. 7, the engagement side surface of the turning power receiving boss 7a and the drive transmission surface 6a are engaged with each other, so that the rotation of the lens barrel drive member 1 and the finder drive gear 5 after the engaged position (wide-angle end position). The operation is transmitted to the finder cam member 7.
[0033]
When zooming from the wide-angle end position to the telephoto end, the lens barrel driving member 1 is rotated counterclockwise from the wide-angle end position to the telephoto end position or a position where a desired focal length is obtained. Is In this case, since the engagement side surface of the turning power receiving boss 7a of the finder cam member 7 and the drive transmission surface 6a of the circular arc groove 6 are already in an engagement relationship, the field of view of the view change type finder F changes from the wide angle end to the telephoto end. Over time, it will be changed according to the focal length at that time.
[0034]
DepartureMing is, As a camera equipped with a retractable zoom lens barrel that has an irradiation angle changing means of flash means as various function meansCan also be appliedYou.
That is, the irradiation angle of the flash means is changed according to the focal length at each time.ToFor example, the visual field changing members 9 and 10 and the finder cam member 7 in the illustrated example are configured to be replaced with appropriate flash irradiation angle changing means and an irradiation angle changing cam member (not shown).
[0035]
DepartureMing is, As a camera equipped with a retractable zoom lens barrel having the photometric range changing means of the photometric means as various functional meansCan also be appliedYou.
That is, when the photometric range of the photometric means is changed according to the focal length at that timeToFor example, the visual field changing members 9 and 10 and the finder cam member 7 in the illustrated example are configured to be replaced with appropriate photometric range changing means and a photometric range changing cam member (not shown).
[0036]
As described above, in the above-described embodiment, as in the conventional example, the photographing optical system driving mechanism and the finder optical system, the driving mechanism of various functional units such as the irradiation angle of the flash unit or the photometric range changing unit of the photometric unit, Unlike the direct connection, the zooming operation is transmitted to various functional means such as a finder optical system within a predetermined zoom range, and the lens barrel retracting operation is performed during the lens barrel retracting operation (collapse operation). The driving force is not transmitted to various function means such as a finder optical system, so that unnecessary driving of various function means can be eliminated particularly during the storage operation, and the amount of operating force is reduced or correspondingly reduced. It has become possible to reduce energy consumption.
[0037]
In addition, a specific region (Change focal lengthArea), the zooming finder optical system is linked to the zooming finder. Therefore, in a camera that performs focusing by extending the entire imaging optical system at the wide-angle end, the zooming mechanism of the imaging optical system and the zooming finder optical in the focusing. The zoom mechanism of the system is independent, so that the finder image can not be moved at all during the focusing..
[0038]
【The invention's effect】
As described above, the present invention providesAn imaging optical system having a variable power lens group that can continuously change the focal length by rotating the lens barrel driving member;
A photographing optical system driving unit having a focal length changing region for continuously changing the focal length of the photographing optical system, and a storage operation region set outside the focal length changing region;
When the focal length of the imaging optical system is changed,According to the focal length at that timeViewfinder viewChange continuouslyA variable-magnification viewfinder that is configured to
HavingRetractable zoom lens barrelA camera with
The shootingOptical system driving meansIs
A finder drive member provided rotatably with respect to the fixed portion and having a drive transmission surface formed to be rotationally displaced in accordance with a rotation operation of the lens barrel drive member,
The field-of-view variable magnification finder is
Variable magnification finder optical system,
Viewfinder optical system driving meansAnd,
The finder optical system driving means,
A finder cam member for driving the zoom finder optical system,
A turning power receiving boss comprising a projecting portion projecting from the finder cam member and engaging with the drive transmission surface;
In the focal length changing area, the drive transmission surface and the turning power receiving boss are kept in an engaged state so as to interlock between the two driving means,Storage operationIn the region, the rotation of the finder cam member is stopped, and the drive transmission surface is configured to maintain the rotation receiving boss in a non-engaged state so that the two driving means are not interlocked. From the viewfinder optical system driving means, especially during the storage operation.Eliminate unnecessary driveYou can do that,Reduction of operating forceNotSaving energy consumptionWhenReduce the working spaceIt is possible to eliminate the disadvantage that the operation at the time of changing the focal length becomes heavy.Camera with retractable zoom lens barrelCan be provided.
[0039]
Further, in the storage operation area, the rotation of the finder cam member is stopped by bringing the rotation power receiving boss into contact with a rotation restricting portion formed on the fixing portion. During the operation, the finder image is not shaken, and the focusing operation is performed at the boundary between the focal length changing area and the storage operation area, that is, at one focal length end adjacent to the storage operation area, for example, at the wide angle end. In the case of the focusing operationEliminates finder image shakeA camera having a retractable zoom lens barrel can be provided.
Further, since the finder cam member is configured to be provided with an urging force in a direction in which the turning power receiving boss presses the drive transmission surface of the finder driving member by an urging means, the turning power of the finder cam member is provided. The receiving boss performs a follow-up rotation operation while pressing the drive transmission surface of the finder driving member to smoothly realize a finder field of view corresponding to an arbitrary focal length. With a simple configuration, to allow the finder drive member to rotate after contacting the automatic limiter formed on the fixed part,unnecessaryViewfinder optical systemDrive can be eliminatedNext to smaller spaceThis provides an excellent effect that energy consumption can be reduced.
[Brief description of the drawings]
FIG. 1 is a main part configuration diagram showing a main part configuration of a camera provided with a retractable zoom lens barrel according to the present invention in a plane orthogonal to an optical axis.
FIG. 2 is a right side view according to a main configuration of FIG. 1;
FIG. 3 is an operation basic diagram for explaining an operation in a main part configuration diagram, and is a diagram viewed from a direction of an arrow A in FIG. 2;
4 is an operation explanatory view showing a positional relationship between a drive transmitting surface of an arc groove and a turning power receiving boss in the state of FIG. 3, showing a state when the photographing optical system realizes a telephoto end; It is.
FIG. 5 is an operation explanatory diagram showing a state when the view changing member realizes a finder view corresponding to the focal length at that time.
FIG. 6 is an operation explanatory diagram showing a state when the photographing optical system is forcibly stopped at a wide-angle end position and the retractable zoom lens barrel shifts to a retracted state.
FIG. 7 is a schematic external view showing a state in which the camera provided with the retractable zoom lens barrel according to the present invention is carried or not used, and shows a state in which the retractable zoom lens barrel is in a retracted state.
FIG. 8 is a schematic external view showing a state in which a camera equipped with a retractable zoom lens barrel according to the present invention is photographed or in a standby state, and shows a state in which the retractable zoom lens barrel is in an extended state.
[Explanation of symbols]
L Retractable zoom lens barrel
B Camera body
F Field of view changeable finder
1 Lens barrel drive member
1a Rack part
2 Idler gear
3 Fixed part
3a Rotation limiter
4 axes
5 Finder drive gear
5b Planting shaft
6 arc groove
6a Drive transmission surface
7 Finder cam member
7a power receiving boss
7b Cam part
7c, 7d End cam
8 Cam shaft
9, 10 View change member

Claims (3)

An imaging optical system having a variable power lens group that can continuously change the focal length by rotating the lens barrel driving member ;
A photographing optical system driving unit having a focal length changing region for continuously changing the focal length of the photographing optical system, and a storage operation region set outside the focal length changing region;
When the focal length of the photographing optical system is changed, and the view scaling type finder, which is configured to be capable of continuously changing the viewfinder according to prevailing focal length,
A camera equipped with a retractable zoom lens barrel having
The photographing optical system driving means,
Provided rotatably relative to the fixed part, comprises a finder driving movement member having the formed drive transmitting surfaces so as to involve times dynamically displacing the rotation operation of the lens barrel driving member,
The field-of-view variable magnification finder is
Variable magnification finder optical system ,
Finder optical system driving means ,
The finder optical system driving means,
A finder cam member for driving the zoom finder optical system,
A turning power receiving boss comprising a projecting portion projecting from the finder cam member and engaging with the drive transmission surface;
In the focal length changing area, the drive transmission surface and the turning power receiving boss are kept in an engaged state so as to interlock between the two driving means, and in the storage operation area, the finder cam is provided. A retractable zoom , wherein the rotation of the member is stopped, and the drive transmission surface is maintained in a non- engaged state so that the rotational power receiving boss is not interlocked between the two driving means. Camera with lens barrel. The rotation of the finder cam member is stopped by contacting the power receiving boss with a rotation restricting portion formed in the fixed portion in the storage operation area. A camera equipped with the retractable zoom lens barrel described in the above . The finder cam member is provided with an urging force in a direction in which the rotating power receiving boss presses the drive transmission surface of the finder driving member by an urging means. A camera equipped with the retractable zoom lens barrel described in the above .

Images