JP2006039373A - Optical apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compactly store a lens barrel in an optical apparatus while not taking a photograph. <P>SOLUTION: At the time of non-photographing, a diaphragm driving windmill is engaged with a second member, and a lens movement frame is moved out of an optical axis by diaphragm opening and closing operations, and then the optical apparatus is collapsed to shorten the overall length at the time of collapse. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical apparatus such as a video camera or a camera.

In optical devices such as cameras and video cameras, there are many optical devices in which the lens barrel that holds the photographic lens protrudes from the front surface of the camera body. To improve the portability of the optical devices, A so-called collapsible configuration in which the lens barrel is retracted and stored in the optical device casing is often used. If the photographic lens is a zoom lens, the number of lenses increases, so it is difficult to retract all the lenses within the thickness of the camera body. Therefore, for example, Patent Document 1 adopts a configuration in which the lens group is retracted in the direction perpendicular to the optical axis direction by an independent driving unit.
JP 2003-149723 A

  As described above, since there are a large number of zoom lenses, it is difficult to retract all the lenses within the thickness of the camera body. With the configuration of Patent Document 1, the lens group is retracted in the direction perpendicular to the optical axis direction. Since the other lens group is moved to the vacant space, the thickness in the optical axis direction when retracted can be reduced. However, in this configuration, since the lens group is retracted in the direction perpendicular to the optical axis direction by an independent driving means, there is a problem that a space for the driving means is required and the size of the optical apparatus is increased.

  In order to solve the above problem, the first invention according to the present application is that, in the photographing region, the light amount adjustment drive lever of the light amount adjustment device in the optical device or a member connected to the drive lever is in a non-engagement state with the lens slide member. When entering the retracted area from the aperture photographing area, first, the drive lever or a member connected to the aperture drive lever is engaged with the slide member, and the slide member is engaged with the lens moving frame for holding the lens. After the engagement, the slide member is driven by the light amount adjustment operation, the lens moving frame engaged with the slide member is retracted from the optical axis, and the collapse is completed.

  With the above configuration, since the lens moving frame is retracted from the optical axis by using the driving force of the aperture driving lever, it is not necessary to provide an independent driving means for retracting the lens inside the optical device. Contributes to

  According to a second aspect of the present application, in the photographing region, the light amount adjusting drive lever of the light amount adjusting device inside the optical device or a member connected to the drive lever is in a non-fitted state with the lens slide member. When entering the retracted region, first, the drive lever or the member connected to the aperture drive lever is engaged with the slide member, and after the engagement, the slide member is driven by the light amount adjusting operation. The lens moving frame comes into contact with the lens moving frame to be held, and the lens moving frame is retracted from the optical axis, whereby the retraction is completed.

  With the above configuration, it is not necessary to arrange an independent driving means for retracting the lens inside the optical device, which contributes to downsizing of the optical device. Further, by providing chamfering on the slide member and the drive lever, the positions of both can be set to some extent rough.

  According to the description of the first aspect, in the photographing region, the light amount adjusting drive lever of the light amount adjusting device in the optical device or a member connected to the drive lever is in a non-engagement state with the rotary gear, and from the aperture photographing region. When entering the retracted region, first, the drive lever or the member connected to the aperture drive lever is engaged with the rotation gear, and the rotation gear is engaged with the lens moving frame that holds the lens. The adjusting operation is such that the rotating gear is rotated, the lens moving frame engaged with the rotating gear is retracted from the optical axis, and the collapsing is completed. The moving frame retracts from the optical axis. Therefore, there is no need to arrange an independent driving means for retracting the lens inside the optical device, which contributes to downsizing of the optical device.

  According to the description of the second aspect, in the photographing region, the light amount adjusting drive lever of the light amount adjusting device inside the optical apparatus or a member connected to the drive lever is in a non-fitted state with the lens slide member. First, the drive lever or the member connected to the aperture drive lever is fitted with the slide member, and after the fitting, the slide member is driven by the light amount adjusting operation. Since the lens moving frame abuts on the lens moving frame that holds the lens, the lens moving frame is retracted from the optical axis, and the retraction is completed, the lens moving frame is retracted from the optical axis by using the driving force of the aperture driving lever. Therefore, there is no need to arrange an independent driving means for retracting the lens inside the optical device, which contributes to downsizing of the optical device. Further, by providing chamfering on the slide member and the drive lever, the positions of both can be set to some extent rough.

  Three examples relating to the optical apparatus of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating an entire camera described in the present embodiment. This camera comprises a main body B and a lens barrel L. Details of the lens barrel L will be described with reference to FIG.

  2 and 3 are explanatory views when the present invention is applied to a lens barrel having a three-group variable magnification optical system having convex and concave portions, and FIG. 2 shows a use state (feed-out state). It is a figure showing the accommodation state (collapsed state). L1 is a first lens group, L2 is a second lens group that performs a zooming operation by moving in the optical axis direction, and L3 is a third lens group that performs a focusing operation by moving in the optical axis direction. L4 is a low-pass filter (LPF).

  1 is a front cap, 2 is a decorative name plate, 3 is a first group lens barrel, 4 is a barrier, 5 is a second cam ring, 6 is a second rectilinear key, 7 is a first cam ring, and 8 is an inner diameter A fixed lens barrel having a cam groove in the first lens, 9 is a first straight key, 10 is a light quantity adjusting device, 11 is a second lens barrel, 12 is a third lens barrel, 13 is a CCD holder, and 14 is a CCD. is there.

  In FIG. 2, in the normal photographing state, the first group lens L1 held by the first group barrel 3 and the second group lens L2 held by the second group barrel 11 are arranged at a predetermined interval, and the zoom position is set. Is done. The focusing operation is performed when the third lens unit L3 held in the third lens barrel 12 moves in the optical axis direction. As the light amount adjustment, the aperture adjustment device 10 performs the setting of the aperture diameter and the shutter operation, and the image formed on the focus surface is converted into an electrical signal by the CCD 14 to form a digital image.

  The light amount adjusting device 10 combines the aperture function and the shutter function by being fully opened from the position of the intermediate aperture. Even if a dedicated diaphragm blade and a shutter blade are prepared separately, they are the same.

  FIG. 3 is a sectional view of the photographic barrel in the retracted state, in which the second group barrel 11 is retracted to a position different from the optical axis. When the collapsing is finally completed, the second group barrel 11 holding the second lens group L2 is off the optical axis and is located outside the low pass filter L4. As a result, the entire length of the lens barrel can be shortened when the optical apparatus is not used, and the camera and the like can be compactly assembled.

  The light quantity adjusting device 10 is a so-called iris diaphragm that changes the aperture diameter by moving six diaphragm blades perpendicularly to the optical axis. The light amount adjusting device 10 holds a moving frame 11 that holds the second lens unit L2. The light quantity adjusting device 10 and the second group lens barrel 11 move simultaneously in the optical axis direction. However, the second group barrel 11 moves independently of the light amount adjusting device 10 in the direction perpendicular to the optical axis.

  Details of the method of moving the light amount adjusting device 10 and the second group lens barrel 11 will be described below with reference to FIGS. 4 to 6 are perspective views as seen from the imaging surface side, FIG. 4 is a diagram showing the relationship between the light amount adjusting device 10 and the second group barrel 11 during normal use of the camera, and FIG. 5 shows the lens barrel. FIG. 6 shows the final lens storage state when the lens is stored. Similarly, FIGS. 7 to 9 are diagrams showing the relationship between the light amount adjusting device 10 and the second group barrel 11 during normal use of the camera, and FIG. 8 is an intermediate stage when the lens barrel is housed. Is the final lens storage state. However, FIGS. 7 to 9 are perspective views as viewed from the first lens unit L1 side without displaying the base member 10b of the light amount adjusting device 10. FIG.

  Reference numeral 10a denotes an aperture drive actuator, and its rotational force is first transmitted to the first gear 10f. The first gear 10f is engaged with the windmill 10e. The windmill 10e rotates around the optical axis and has six pins 10e1. The long holes 10g2 of the aperture blade 10g are fitted to the six pins 10e1. A round hole 10g1 of the aperture blade 10g is fitted with a pin of an aperture base plate (not shown). Therefore, when the windmill 10e rotates, the six aperture blades 10g rotate around the round hole portion 10g1, and the aperture opening / closing operation is performed.

  In addition, two guide bars 10c are fixed to the aperture unit, and the guide bar is fitted with the sleeve portion 11a and the U groove portion 11b of the second group barrel 11, and moves in the direction perpendicular to the optical axis direction. The second group barrel 11 is inserted as possible. During normal use, the second group lens barrel 11 is biased in one direction by the biasing spring 10d, so that the optical axis of the second lens unit L2 is set to be coaxial with the optical axis of the entire lens system. Has been. A gear 11 a 1 is formed on the sleeve portion 11 a of the second group barrel 11.

  When shifting from the normal state to the retracted state, first, the aperture state is set to the closed side, and the aperture unit 10 together with the second group lens barrel 11 moves to the imaging surface side in the optical axis direction. The rear barrel 13 (not shown) has a gear 13a rotatably attached thereto. When the aperture unit 10 moves to the imaging surface side, the rear portion of the gear portion 10e2 of the windmill 10e and the gear portion 11a1 of the second group barrel 11 are rear. The gear 13a on the lens barrel side is engaged. When the aperture state is changed from the closed side to the open side in the engaged state, the rotational force of the windmill 10e is transmitted to the gear 13a on the rear barrel side and further to the gear portion 11a1 of the second group barrel 11. As a result, the second lens group barrel 11 moves along the guide bar 10c in the direction perpendicular to the optical axis direction. When the movement of the second group lens barrel 11 in the optical axis direction is completed by setting the diaphragm to the closed state, the diaphragm unit 10 is further moved in the direction of the imaging surface, so that 2 in the space next to the low pass filter of the rear lens barrel. The group barrel 11 can be accommodated, and the entire length of the lens barrel when retracted can be shortened.

  According to this embodiment, the drive actuator that finally moves the second group lens barrel 11 perpendicularly to the optical axis direction is used as an aperture driving means during normal use, so that the second group lens barrel 11 can be moved independently. There is no need to dispose another actuator in the lens barrel, and the overall size of the lens barrel can be made compact.

  In the present embodiment, after the aperture is closed, the wind turbine 10e and the rear barrel side gear 13a are engaged to retract the second group barrel 11 to start collapsing, but the second group barrel 11 is started. The wind turbine 10e and the rear barrel gear 13a are engaged in the open state with the moving direction of the lens being reversed, and then the lens is retracted in the direction perpendicular to the optical axis by being in the closed state.

  In this embodiment, the light amount adjusting device 9 is an iris diaphragm that drives six blades. A so-called guillotine diaphragm that drives two blades is used to drive the second group lens barrel 11 perpendicularly to the optical axis direction. It may be driven. Further, in the iris diaphragm form, the first gear 10f directly connected to the drive actuator may directly rotate the gear 13 on the rear barrel side.

(Second Embodiment)
In the second embodiment, since the basic configuration of the lens barrel is the same, the description thereof will be omitted, and the light amount adjusting device 9 and the second group lens barrel 11 having different configurations will be described.

  Details of the method of moving the light amount adjusting device 10 and the second group barrel 11 will be described below with reference to FIGS. 10 to 12 are perspective views as seen from the imaging surface side. FIG. 10 is a view showing the relationship between the light amount adjusting device 10 and the second group lens barrel 11 during normal use of the camera. FIG. 11 shows the lens barrel. FIG. 12 shows the final lens storage state when the lens is stored. Similarly, FIGS. 13 to 15 are views showing the relationship between the light amount adjusting device 10 and the second group barrel 11 during normal use of the camera, and FIG. 14 is an intermediate stage when the lens barrel is housed. Is the final lens storage state. However, FIGS. 13 to 15 do not display the base member 10b of the light amount adjusting device 10, but are perspective views seen from the first lens unit L1 side.

  Reference numeral 10a denotes an aperture drive actuator, and its rotational force is first transmitted to the first gear 10f. The first gear 10f is engaged with the windmill 10e. The windmill 10e rotates around the optical axis and has six pins 10e1. The long holes 10g2 of the aperture blade 10g are fitted to the six pins 10e1. A round hole 10g1 of the aperture blade 10g is fitted with a pin of an aperture base plate (not shown). Therefore, when the windmill 10e rotates, the six aperture blades 10g rotate around the round hole portion 10g1, and the aperture opening / closing operation is performed.

  In addition, two guide bars 10c are fixed to the aperture unit, and the guide bar is fitted with the sleeve portion 11a and the U groove portion 11b of the second group barrel 11, and moves in the direction perpendicular to the optical axis direction. The second group barrel 11 is inserted as possible. During normal use, the second group lens barrel 11 is biased in one direction by the biasing spring 10d, so that the optical axis of the second lens unit L2 is set to be coaxial with the optical axis of the entire lens system. Has been. A convex shape 11 a 2 is formed on the sleeve portion 11 a of the second group barrel 11.

  When shifting from the normal state to the retracted state, first, the aperture state is set to the closed side, and the aperture unit 10 together with the second group lens barrel 11 moves to the imaging surface side in the optical axis direction. The rear barrel 13 (not shown) has a slide member 13b attached so as to be slidable only in the direction perpendicular to the optical axis. The slide member 13b is structured to be movable only in the direction 13b3 with respect to the rear barrel. When the aperture unit 10 moves to the imaging surface side, the pin portion 10e3 of the windmill 10e is fitted with the U groove portion 13b1 of the slide member 13b. At the same time, the upper end surface portion 13b2 of the slide member 13b comes into contact with the convex portion 11a2 of the second group barrel 11. When the state of the aperture is changed from the closed side to the open side from that state, the slide member 13b of the rear barrel is moved in the 13b3 direction by the rotational force of the windmill 10e, and the second lens barrel 11 is moved along the guide bar 10c. Move in the direction perpendicular to the axial direction. When the movement of the second group lens barrel 11 in the direction perpendicular to the optical axis is completed by closing the diaphragm, the diaphragm unit 10 is further moved in the direction of the optical axis imaging surface to thereby move the side of the low-pass filter of the rear lens barrel. The second group lens barrel 11 can be stored in this space, and the entire length of the lens barrel when retracted can be shortened.

  According to this embodiment, the drive actuator that finally moves the second group lens barrel 11 perpendicularly to the optical axis direction is used as an aperture driving means during normal use, so that the second group lens barrel 11 can be moved independently. There is no need to dispose another actuator in the lens barrel, and the overall size of the lens barrel can be made compact. Further, the tip of the pin portion 10e3 of the windmill 10e and the U groove portion 13b1 of the slide member 13b have chamfered shapes, and the pin portion 10e3 is fitted to the U groove portion 13b1 when it is depressed even if the positional accuracy of both is somewhat rough. It can be made.

  In this embodiment, after the aperture is closed, the pin portion 10e3 of the windmill 10e and the slide member 13b on the rear barrel side are fitted to retract the second group barrel 11 to start collapsing. The moving direction of the second group barrel 11 may be reversed so that the windmill 10e and the slide member 13b are fitted in an open state, and then the lens is retracted in a direction perpendicular to the optical axis by being in a closed state.

  In this embodiment, the light amount adjusting device 9 is an iris diaphragm that drives six blades. A so-called guillotine diaphragm that drives two blades is used to drive the second group lens barrel 11 perpendicularly to the optical axis direction. It may be driven. In the iris diaphragm configuration, the first gear 10f to which the drive actuator is directly connected may directly slide the slide member 13b on the rear barrel side.

(Third embodiment)
In the third embodiment, since the basic configuration of the lens barrel is the same, the description thereof will be omitted, and the light amount adjusting device 9 and the second group lens barrel 11 having different configurations will be described.

  Details of the method of moving the light amount adjusting device 10 and the second group lens barrel 11 will be described below with reference to FIGS. 16 to 18 are perspective views as seen from the imaging surface side. FIG. 16 is a view showing the relationship between the light amount adjusting device 10 and the second group barrel 11 during normal use of the camera. FIG. 17 shows the lens barrel. FIG. 18 shows the final lens storage state, which is an intermediate stage during storage. Similarly, FIGS. 19 to 21 are diagrams showing the relationship between the light amount adjusting device 10 and the second group barrel 11 during normal use of the camera, and FIG. 20 is an intermediate stage when the lens barrel is housed. Is the final lens storage state. However, FIG. 19 to FIG. 21 are perspective views as viewed from the first lens unit L1 side without displaying the base member 10b of the light amount adjusting device 10.

  Reference numeral 10a denotes an aperture drive actuator, and its rotational force is first transmitted to the first gear 10f. The first gear 10f is engaged with the windmill 10e. The windmill 10e rotates around the optical axis and has six pins 10e1. The long holes 10g2 of the aperture blade 10g are fitted to the six pins 10e1. A round hole 10g1 of the aperture blade 10g is fitted with a pin of an aperture base plate (not shown). Therefore, when the windmill 10e rotates, the six aperture blades 10g rotate around the round hole portion 10g1, and the aperture opening / closing operation is performed.

  Further, two guide bars 10h1 and 10h2 are fixed to the aperture unit, and the second group barrel 11 is rotatably attached around the guide bar 10h2. The guide bar 10 h 1 is a stopper for the second group barrel 11. The second group barrel 11 is always in contact with the guide bar 10h1 during normal shooting due to the force of the torsion coil spring 10i, and the second group barrel 11 is brought into contact with the second group barrel 11 at this position. The center of the optical axis is coaxial with the center of the optical axis of the entire lens system. A convex shape 11 c is formed in the vicinity of the rotation center of the second group barrel 11.

  When shifting from the normal state to the retracted state, first, the aperture state is set to the closed side, and the aperture unit 10 together with the second group lens barrel 11 moves to the imaging surface side in the optical axis direction. The rear barrel 13 (not shown) has a slide member 13b attached so as to be slidable only in the direction perpendicular to the optical axis. The slide member 13b is structured to be movable only in the direction 13b3 with respect to the rear barrel. When the aperture unit 10 moves to the imaging surface side, the pin portion 10e3 of the windmill 10e is fitted with the U groove portion 13b1 of the slide member 13b. At the same time, the upper end surface portion 13b2 of the slide member 13b comes into contact with the convex portion 11c of the second group barrel 11. When the state of the aperture is changed from the closed side to the open side from that state, the slide member 13b of the rear barrel is moved in the 13b3 direction by the rotational force of the windmill 10e, and the second lens barrel 11 is centered on the guide bar 10h2. It rotates in the direction perpendicular to the optical axis direction. When the diaphragm is closed, when the rotation of the second group lens barrel 11 in the direction perpendicular to the optical axis is completed, the diaphragm unit 10 is further moved in the direction of the optical axis imaging surface, thereby The second group lens barrel 11 can be stored in this space, and the entire length of the lens barrel when retracted can be shortened.

  According to this embodiment, the drive actuator that finally moves the second group lens barrel 11 perpendicularly to the optical axis direction is used as an aperture driving means during normal use, so that the second group lens barrel 11 can be moved independently. There is no need to dispose another actuator in the lens barrel, and the overall size of the lens barrel can be made compact. Further, the tip of the pin portion 10e3 of the windmill 10e and the U groove portion 13b1 of the slide member 13b have chamfered shapes, and the pin portion 10e3 is fitted to the U groove portion 13b1 when it is depressed even if the positional accuracy of both is somewhat rough. It can be made.

  In this embodiment, after the aperture is closed, the pin portion 10e3 of the windmill 10e and the slide member 13b on the rear barrel side are fitted to rotate the second group barrel 11 to start collapsing. The moving direction of the second group lens barrel 11 may be reversed so that the windmill 10e and the slide member 13b are fitted in an open state, and then the lens is rotated in a direction perpendicular to the optical axis by being in a closed state.

  In this embodiment, the light amount adjusting device 9 is an iris diaphragm that drives six blades. A so-called guillotine diaphragm that drives two blades is used to drive the second group lens barrel 11 perpendicularly to the optical axis direction. It may be driven. The first gear 10f to which the drive actuator is directly connected may directly slide the slide member 13b on the rear barrel side.

  FIG. 22 shows a flowchart from the photographing state to the retracted state and a flowchart from the retracted state to the photographing state. FIG. 22 illustrates all the cases of the first to third embodiments. The collapsing operation 1 means that the light amount adjusting device 10 moves to the CCD side in the optical axis direction until the rotating gear 13a or the slide member 13b and the windmill 10e are engaged. The feeding operation 2 refers to the reverse operation. The retracting operation 2 means that after the second group lens barrel is retracted, the light quantity adjusting device 10 is further moved to the CCD side in the optical axis direction, and the second group lens barrel 11 enters the outside of the low-pass filter 11, and in the state of FIG. Say until the final collapsed state. The feeding operation 1 is the reverse operation.

The perspective view of the whole camera. Sectional drawing which shows the time of normal use of a lens-barrel. The figure which shows the time of lens barrel retracting. The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 1). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 1). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 1). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 1). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 1). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 1). The figure which shows the detail of the light quantity adjustment apparatus 10 and the movement frame 11 (Example 2). The figure which shows the detail of the light quantity adjustment apparatus 10 and the movement frame 11 (Example 2). The figure which shows the detail of the light quantity adjustment apparatus 10 and the movement frame 11 (Example 2). The figure which shows the detail of the light quantity adjustment apparatus 10 and the movement frame 11 (Example 2). The figure which shows the detail of the light quantity adjustment apparatus 10 and the movement frame 11 (Example 2). The figure which shows the detail of the light quantity adjustment apparatus 10 and the movement frame 11 (Example 2). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 3). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 3). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 3). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 3). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 3). The figure which shows the detail of the light quantity adjustment apparatus 10 and the moving frame 11 (Example 3). The figure which shows the flowchart from imaging | photography state-> retracted state, retracted state-> imaging | photography state (Examples 1-3).

Claims (2)

  In the photographing region, the light amount adjusting drive lever of the light amount adjusting device inside the optical device or a member connected to the drive lever is in a non-engagement state with the rotating gear. A member connected to the aperture driving lever is engaged with a rotation gear, and the rotation gear is engaged with a lens moving frame that holds the lens. After the engagement, the rotation gear is rotated by a light amount adjustment operation. An optical apparatus characterized in that the lens moving frame engaged with the rotating gear is retracted from the optical axis, and the collapsing is completed.   In the photographing region, the light amount adjusting drive lever of the light amount adjusting device in the optical device or a member connected to the drive lever is not fitted to the lens slide member. Alternatively, a member connected to the aperture driving lever is fitted to the slide member, and after the fitting, the slide member is driven by a light amount adjusting operation, and the slide member comes into contact with the lens moving frame holding the lens to move the lens. An optical instrument characterized by the fact that the frame is retracted from the optical axis and the collapse is completed.

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