JP5515622B2 - Lens barrel and lens barrel - Google Patents

Description

The present invention relates to a lens barrel and a lens barrel .

  In recent years, digital still cameras and video movies using an image sensor such as a charge coupled device (CCD) and a complementary metal-oxide semiconductor (CMOS) sensor have been widely used. Generally, a lens barrel for forming an optical image of a subject on an image sensor is attached to these digital still cameras and video movies. In particular, in digital still cameras, a retractable type in which a lens barrel is housed in a camera body when shooting is not widely used. A retractable lens barrel is disclosed in Patent Document 1, for example.

  As described in Patent Document 1, the retractable lens barrel includes a fixed barrel, a first movable barrel, and a second movable barrel. The fixed barrel is disposed in the camera body, the second movable barrel is held inside the fixed barrel, and the first movable barrel is held inside the second movable barrel.

  In the retractable lens barrel, when shooting, the second movable barrel is extended relative to the fixed barrel, or the first movable barrel is extended relative to the second movable barrel. Or When the first and second movable lens barrels are extended forward, the first movable lens barrel is extended to the forefront. Conversely, when shooting is not performed, the first movable lens barrel is accommodated in the second movable lens barrel, the second movable lens barrel is accommodated in the fixed lens barrel, and the lens barrel is accommodated in the camera body. .

  This lens barrel includes a mechanism for performing focus adjustment and zoom adjustment of an optical image of a subject. For example, a lens group for capturing an optical image, a zoom lens group, and a focus lens group are arranged inside the lens barrel. When photographing, the zoom and focus of the optical image are adjusted by changing the interval between the lens groups.

  Specifically, a lens group for capturing an optical image is attached to the first lens frame and held by the first movable lens barrel, and a zoom lens group is attached to the second lens frame and the second movement is performed. The focusing lens group is attached to the third lens frame and held by the fixed barrel. Then, the first and second movable lens barrels are extended with respect to the fixed lens barrel, the zoom lens group is moved on the optical axis with respect to the second movable lens barrel, or the third movable lens barrel. On the other hand, the distance between the lens groups is changed by moving the focusing lens group on the optical axis. The second lens frame includes a shutter unit, and the shutter unit opens and closes the shutter of the zoom lens group.

  FIG. 9 is a rear perspective view of the conventional lens barrel when retracted.

  The flexible wiring for signal transmission will be described with reference to FIG. The lens barrel is provided with an actuator 10 for extending and storing the first and second movable barrels. An electric signal for controlling the actuator 10 is transmitted through a first flexible wiring 20 for signal transmission. An electric signal for controlling the shutter unit is transmitted via the second flexible wiring 30 for signal transmission.

  An electrical signal transmitted to the first flexible wiring 20 and the second flexible wiring 30 is supplied from the camera body. In particular, the second flexible wiring 30 overlaps with the first flexible wiring 20 and is electrically connected using the solder 40 at the end surface (optical axis surface) of the fixed barrel. The second flexible wiring 30 is drawn out from the inner side of the lens barrel and connected to the first flexible wiring 20, and an electrical signal is transmitted to the second flexible wiring 30 via the first flexible wiring 20. Is done. A configuration in which a plurality of flexible wires are arranged in such a camera body and these flexible wires are electrically connected to each other is disclosed in Patent Document 2.

JP 2008-185786 A JP 2003-228107 A

  In the conventional lens barrel, the first flexible wiring 20 that controls the actuator 10 and the second flexible wiring 30 that controls the shutter unit are soldered on the end surface (optical axis surface) of the fixed barrel. Are electrically connected.

  In general, when electrical connection is made using solder, a heated pin is brought into contact with the solder to melt the solder. When the pins are pulled out from the solder, the solder extends in the pin pulling direction, and the solder may be solidified as it is. In this case, due to this elongation, an extra thickness of about 1 mm is generated in the solidified solder.

  That is, in the above configuration, the thickness of the lens barrel (in the optical axis direction) is approximately several millimeters due to the thickness of the solder 40 and the thickness of the first and second flexible wirings 20 and 30 superimposed. The thickness was also likely to increase.

  In particular, retractable type compact digital cameras are becoming very thin, and it is important how thin the lens barrel can be. However, the above configuration has a problem that it is difficult to reduce the thickness of the lens barrel due to the thickness of the solder 40 and the thickness of the first and second flexible wirings 20 and 30 being overlapped.

SUMMARY OF THE INVENTION The present invention solves the above problems, and an object of the present invention is to provide a lens barrel and a lens barrel that are reduced in thickness.

In order to achieve the above object, a lens barrel according to the present invention includes at least one lens having an optical axis, a first surface substantially perpendicular to the optical axis, and a second surface adjacent to the first surface. A first frame having at least one electrical component, a second frame for holding the electrical component, and a bent portion that is partially fixed to the first frame and bent from the first surface to the second surface. A first electric board having a second electric board partially fixed to the second frame, and the first electric board and the second electric board are electrically connected on the second surface. It is a configuration.

In order to achieve the above object, the lens barrel of the present invention is a lens barrel including a first frame and a second frame movable relative to the first frame in a range, The first frame is provided with a first electric board, the first electric board is wired from the bottom surface of the first frame, and is bent from the bottom surface of the first frame to be wired to the side surface, The second frame is provided with a second electric substrate, the second electric substrate is wired to the side surface of the first frame, and the first electric substrate is connected to the second electric substrate on the side surface of the first frame. Connected, configuration.

According to the lens barrel and the lens barrel of the present invention, the thickness (thickness in the optical axis direction) of the lens barrel and the lens barrel does not increase. Therefore, the lens barrel and the lens barrel can be reduced in thickness.

Sectional drawing at the time of Wide of lens barrel in one embodiment Sectional view of the lens barrel at Tele Sectional view of the lens barrel when retracted Rear perspective view of the lens barrel when retracted Rear view of the lens barrel when retracted The perspective view which shows the state at the time of the connection of the 1st, 2nd flexible wiring in the A section of FIG. The front side perspective view which shows the state before the connection of the 1st, 2nd flexible wiring in the A section of FIG. The rear side perspective view which shows the state before the connection of the 1st, 2nd flexible wiring in the A section of FIG. Rear perspective view of a conventional lens barrel when retracted

  Hereinafter, a lens barrel and an imaging apparatus using the same according to an embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a lens barrel in Wide mode (in normal shooting with a zoom magnification of 1) according to an embodiment. FIG. 2 is a telephoto view of the lens barrel (zoom magnification is set to a maximum magnification). FIG. 3 is a cross-sectional view when the lens barrel is retracted (not photographed).

<Overall Configuration and Operation of Lens Barrel 100>
The overall configuration and operation of the lens barrel 100 will be described. 1 to 3, the lens barrel 100 includes a fixed barrel 110 and a movable barrel 120 held inside the fixed barrel 110. The movable lens barrel 120 moves so as to be drawn forward relative to the fixed lens barrel 110 or housed in the fixed lens barrel 110.

  The movable lens barrel 120 includes a first movable lens barrel 120a, a second movable lens barrel 120b, and a third movable lens barrel 120c. The second movable lens barrel 120b is held inside the third movable lens barrel 120c, and the first movable lens barrel 120a is held inside the second movable lens barrel 120b. The second movable lens barrel 120b is extended with respect to the third movable lens barrel 120c, and the first movable lens barrel 120a is extended with respect to the second movable lens barrel 120b. Further, the second movable lens barrel 120b is accommodated in the third movable lens barrel 120c, and the first movable lens barrel 120a is accommodated in the second movable lens barrel 120b. As described above, the first to third movable lens barrels 120 a to 120 c are extended forward with respect to the fixed lens barrel 110, or the first to third movable lens barrels 120 a to 120 c are accommodated in the fixed lens barrel 110. Or When the first to third movable lens barrels 120a to 120c are extended forward, the first movable lens barrel 120a is extended to the forefront.

  The first moving lens barrel 120a holds the first lens group 140a via the first lens frame 130a, and the second moving lens barrel 120b holds the second lens frame 130b via the second lens frame 130b. The third lens group 140c is held in the fixed barrel 110 via the third lens frame 130c. The first lens frame 130a is fixed to the first moving lens barrel 120a, the second lens frame 130b is held movably on the optical axis by the second moving lens barrel 120b, and the third lens frame 130c is The fixed barrel 110 is held movably on the optical axis.

  The first to third lens groups 140a to 140c are each configured by combining a plurality of lenses. The first lens group 140a is a lens group for capturing an optical image of a subject, the second lens group 140b is a zoom lens group, and the third lens group 140c is a focus lens group. When photographing, the zoom and focus of the optical image are adjusted by changing the interval between the first to third lens groups 140a to 140c.

<Detailed description of lens barrel 100>
Next, the lens barrel 100 will be described in detail. 1 to 3, the first movable lens barrel 120a includes a barrier unit 150 on the front surface for protecting the first lens group 140a. The barrier unit 150 holds an opening / closing wing 150a. The opening / closing wing 150a is opened during shooting, and the opening / closing wing 150a is closed during non-shooting to protect the first lens group 140a.

  The second movable lens barrel 120 b includes a cylindrical camera cam frame 160 and a cylindrical rectilinear frame 170 held inside the camera cam frame 160. The first moving lens barrel 120a is movably held on the optical axis inside the rectilinear frame 170, and the second lens frame 130b is movably held on the optical axis by the rectilinear frame 170. . A cam groove is formed on the inner surface of the camera cam frame 160, and the first lens group 140a and the second lens group 140b are moved in the optical axis direction by the cam groove. A rectilinear groove is formed in the rectilinear frame 170, and the first lens group 140a and the second lens group 140b are linearly moved by the rectilinear frame 170.

  The second lens frame 130b holding the second lens group 140b for zooming includes a shutter unit 180, a camera shake correction mechanism 185, an aperture mechanism, and the like. The shutter 180a of the second lens group 140b for zooming is opened and closed by the shutter unit 180, the camera shake correction is performed by the camera shake correction mechanism 185, and the diaphragm is adjusted by the diaphragm mechanism.

  The third movable lens barrel 120 c includes a cylindrical drive frame 210 and a penetrating cam frame 220 held inside the drive frame 210. Inside the penetrating cam frame 220, the second movable lens barrel 120b is held movably on the optical axis.

  The fixed barrel 110 includes a cylindrical fixed frame 230 and a cylindrical master flange 240 fixed to the fixed frame 230. The third movable lens barrel 120c is held inside the fixed frame 230 so as to be movable on the optical axis, and the third lens frame 130c is held on the fixed frame 230 so as to be movable on the optical axis. . A CCD unit 260 is arranged on the optical axis at the center of the master flange 240 via an IR cut glass 250 for blocking infrared rays.

<Detailed Description of First Flexible Wiring 310 and Second Flexible Wiring 320>
Next, the first flexible wiring 310 and the second flexible wiring 320 will be described in detail. 4 is a rear perspective view when the lens barrel is retracted, and FIG. 5 is a rear view when the lens barrel is retracted.

  As shown in FIGS. 4 and 5, an actuator 300 is disposed on the peripheral surface of the lens barrel 100. With this actuator 300, the movable lens barrel 120 is extended or stored with respect to the fixed lens barrel 110.

  One end of a first flexible wiring 310 for signal transmission is connected to the actuator 300. The other end of the first flexible wiring 310 is connected to a control unit (not shown) of the camera body. An electric signal is transmitted from the control unit of the camera body via the first flexible wiring 310, and the actuator 300 is controlled. One end of the first flexible wiring 310 is separated into two, and one separated end is connected to the actuator 300.

  Further, as shown in FIG. 1, a second flexible wiring 320 for signal transmission is connected to the shutter unit 180, the camera shake correction mechanism 185, the diaphragm mechanism, and the like. Each mechanism is controlled via the second flexible wiring 320. The second flexible wiring 320 is arranged inside the lens barrel 100 such as the inside of the movable barrel 120 or the fixed barrel 110. One end portion of the second flexible wiring 320 is connected to a control terminal portion disposed on the second lens frame 130b, and the other end portion of the second flexible wiring 320 is connected to the optical axis toward the fixed barrel 110. It is pulled out in the parallel direction.

  6 is a perspective view showing a state when the first and second flexible wirings 310 and 320 in the A part of FIG. 4 are connected, and FIGS. 7 and 8 are first and second flexible wirings 310 and A in the A part of FIG. It is the front side perspective view and the back side perspective view which show the state before the connection of 320. FIG.

  As shown in FIGS. 6 to 8, an insertion receiving portion 314 is formed at the other separated end of the first flexible wiring 310, and an insertion portion 324 is formed at the other end of the second flexible wiring 320. Is formed. The insertion portion 324 of the second flexible wiring 320 is inserted into the insertion receiving portion 314 of the first flexible wiring 310, and the contact portion (not shown) arranged in the insertion receiving portion 314 and the insertion portion 324 are arranged. The contact portion 325 is electrically connected to conduct. That is, an electrical signal is transmitted from the control unit of the camera body via the first flexible wiring 310, and the shutter unit 180, the camera shake correction mechanism 185, the diaphragm mechanism, and the like connected to the second flexible wiring 320 are controlled.

  The first flexible wiring 310 and the second flexible wiring 320 are formed of a resin film. The insertion portion 314 of the first flexible wiring 310 is formed by attaching a resin part, and the insertion portion 324 of the second flexible wiring 320 is formed by sticking a reinforcing plate 340 with an adhesive according to its shape. ing. In addition, a convex portion 326 is arranged at a position slightly away from the tip of the insertion portion 324 of the second flexible wiring 320.

  As shown in FIG. 4, the insertion receiving part 314 of the first flexible wiring 310 and the insertion part 324 of the second flexible wiring 320 are arranged on the peripheral surface of the lens barrel 100 and face the same direction as the optical axis direction. The insertion portion 324 is inserted into the insertion receiving portion 314. On the peripheral surface of the lens barrel 100, a locking piece 330 for locking the convex portion 326 of the insertion portion 324 is disposed. The protrusion 326 of the insertion portion 324 is locked to the locking piece 330, the tip of the insertion portion 324 is inserted into the insertion receiving portion 314, and the first flexible wiring 310 and the second flexible wiring 320 are electrically connected. Connected to.

  The locking piece 330 has a right angle surface 330a that is perpendicular to the optical axis direction, and the convex portion 326 of the insertion portion 324 is locked in the optical axis direction to the right angle surface 330a. As a locking method, a recess, a through hole, or the like may be provided in the locking piece 330 and the insertion portion 324 may be inserted and locked. In addition, although the reinforcement board 340 is affixed on the insertion part 324 with the adhesive agent, the deformation | transformation by insertion force is prevented by this.

  In addition, as shown in FIGS. 1 to 3, the second flexible wiring 320 expands and contracts due to a zoom operation or the like. There is a possibility that the plug-in part 324 may come off and be disconnected. For this purpose, the pins 240 a arranged on the master flange 240 are press-fitted into the through holes arranged on the second flexible wiring 320. Thereby, since the 2nd flexible wiring 320 is fixed, even if tensile stress generate | occur | produces, the insertion part 324 does not come out from the insertion receiving part 314. FIG.

<About the connection position of the insertion part 324 and the insertion receiving part 314>
As shown in FIG. 4, the lens barrel 100 has a space between the screw through hole 350 for fixing and holding the lens barrel 100 to the camera body (not shown) and the actuator 300. The locking piece 330 is disposed in the space between the screw through hole 350 and the actuator 300, and the insertion portion 324 is inserted into the insertion receiving portion 314.

<About an imaging apparatus using the lens barrel 100>
Next, the imaging device will be described. Examples of the imaging device include a digital still camera and a video movie using an imaging element such as a CCD or a CMOS sensor. The lens barrel 100 described above may be attached to these digital still cameras and video movies in order to form an optical image of the subject on the imaging device.

<Summary of one embodiment>
According to the lens barrel 100 having the above-described configuration and the imaging apparatus using the lens barrel, the first flexible wiring 310 and the second flexible wiring 320 are electrically connected on the peripheral surface of the fixed barrel 110, so that the lens The thickness of the lens barrel 100 (thickness in the optical axis direction) does not increase. Therefore, the dimension of the lens barrel 100 in the optical axis direction can be reduced.

  Further, the insertion portion 324 is disposed at the end portion of the first flexible wiring 310, the insertion receiving portion 314 is disposed at the end portion of the second flexible wiring 320, and the insertion portion 324 is inserted into the insertion receiving portion 314. Thus, since the first flexible wiring 310 and the second flexible wiring 320 are electrically connected, there is no need to electrically connect using solder as in the prior art. In other words, when electrically connected using solder, it was necessary to arrange an insulating member or increase the distance from the electronic component so as not to short-circuit the electronic component of the camera body. According to this, there is no such need, and the degree of freedom in design can be improved.

  In addition, since the insertion direction of the insertion portion 324 with respect to the insertion receiving portion 314 is the same as the optical axis direction, the first flexible wiring 310 and the second flexible wiring 320 can also be pulled out in the optical axis direction. That is, the lead portion of the first and second flexible wirings 320 can be linear. As a result, even when a tensile stress or a compressive stress is generated in the first and second flexible wirings 320 when the lens barrel 100 is extended or stored, the stress is concentrated only by applying a linear stress. Can be prevented and disconnection can be prevented.

  Further, since the reinforcing plate 340 is affixed to the insertion portion 324 with an adhesive, the insertion port is harder than the wiring portion, so that the insertion portion 324 can be easily inserted into the insertion receiving portion 314. In general, the flexible wiring is formed of a resin film. However, in the insertion portion that remains as this resin film, the insertion portion is likely to be bent and may not be inserted into the insertion receiving portion 314 in some cases. However, according to the said structure, since the insertion part 324 hold | maintains fixed hardness, insertion becomes easy.

  In addition, since the reinforcing plate 340 of the insertion portion 324 is locked to the fixed frame disposed in the fixed barrel, the insertion portion 324 is difficult to separate from the insertion receiving portion 314, and connection reliability can be improved.

  In addition, the lens barrel 100 is inserted into a dead space as close to the central axis of the lens barrel 100 as possible, such as an empty space between the screw through hole 350 and the actuator 300 for fixing and holding the lens barrel 100 to the camera body (not shown). Since the part 324 and the plug receiving part 314 are arranged, the outer diameter size of the lens barrel 100 can be suppressed.

  In this embodiment, the insertion portion 324 is arranged at the end of the first flexible wiring 310 and the insertion receiving portion 314 is arranged at the end of the second flexible wiring 320. The first and second flexible wirings 310 and 320 may be electrically connected by arranging the insertion receiving part 314 on the peripheral surface and inserting the two insertion parts 324 into the insertion receiving part 314. .

  In the present embodiment, the insertion portion 324 is disposed at the end of the first flexible wiring 310 and the insertion receiving portion 314 is disposed at the end of the second flexible wiring 320. The insertion receiving part 314 may be arranged at the end, and the insertion part 324 may be arranged at the end of the second flexible wiring 320.

  Further, since the contact portion 325 is disposed so as to be exposed in the insertion portion 324, the first flexible wiring in which the insertion portion 324 is disposed through the contact portion 325 of the insertion portion 324 during the inspection process or the like. The continuity check of the device connected to the 310 or the second flexible wiring 320 can be easily performed.

  As described above, according to the present embodiment, since the first flexible wiring 310 and the second flexible wiring 320 are electrically connected on the peripheral surface of the fixed barrel 110, the thickness of the lens barrel 100 ( The thickness in the optical axis direction) is not increased. Therefore, since the size of the lens barrel 100 in the optical axis direction can be reduced, the lens barrel can be thinned, and the imaging apparatus can be thinned.

The present invention is applicable to lens barrels and lens barrels of digital cameras and video movies.

DESCRIPTION OF SYMBOLS 100 Lens barrel 110 Fixed barrel 120 Moving barrel 120a First moving barrel 120b Second moving barrel 120c Third moving barrel 130a First lens frame 130b Second lens frame 130c Third lens Frame 140a First lens group 140b Second lens group 140c Third lens group 150 Barrier unit 150a Opening and closing blades 160 Camera cam frame 170 Linear frame 180 Shutter unit 180a Shutter 185 Camera shake correction mechanism 210 Drive frame 220 Through cam frame 230 Fixed Frame 240 Master flange 250 IR cut glass 260 CCD unit 300 Actuator 310 First flexible wiring 314 Insertion receiving portion 320 Second flexible wiring 324 Insertion portion 325 Contact portion 326 Convex portion 330 Locking piece 340 Reinforcing plate 3 0 screw through hole

Claims (2)

A lens barrel comprising a first frame and a second frame disposed inside the first frame and movable relative to the first frame,
The first frame is provided with a first electric board, and the first electric board is wired from the bottom surface of the first frame and is bent from the bottom surface of the first frame, thereby Wired to the side,
The second frame is provided with a second electric board, and the second electric board is wired to the side surface of the first frame,
One end of the second electric board is detachably electrically connected to the first electric board on a side surface of the first frame,
Furthermore, the second electric board has a movable part that bends as the second frame moves, and a part between the movable part and the one end is locked or fixed to the first frame ,
Further, the first frame has a locking piece on a side surface, the locking piece has a right-angled surface perpendicular to the side surface of the first frame, and one end portion of the second electric board is a convex portion. And the convex part is locked to the right-angled surface,
The first electric board has a plug receiving part for electric connection,
The second electrical board has an insertion part for electrical connection,
The first electric board and the second electric board are electrically connected by inserting the tip of the insertion part into the insertion receiving part.
A lens barrel. The first frame includes a pin, the second electric substrate has a through hole, and when the through hole is press-fitted into the pin, a part between the movable portion and the one end portion is Fixed to the first frame;
The lens barrel according to claim 1.

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