JP2013228484A - Lens barrel and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a light blocking performance for unnecessary light.SOLUTION: A lens barrel comprises: a moving ring at least part of which is inserted inside a drive ring, which is supported by the drive ring so as to be movable, and which has an insertion hole; a movable frame at least part of which is inserted inside the moving ring, which is supported by the drive ring so as to be movable in the direction of an optical axis, and which is made movable in a direction of an optical axis with respect to the moving ring and rotatable in a rotation direction of the optical axis; and a light blocking member which is supported by the movable frame and at least part of which is inserted in the insertion hole of the moving ring. Thus, at least part of the light blocking member is located between an inner peripheral face of the moving ring and an outer peripheral face of the moving frame. Accordingly, it is possible to improve a light blocking performance for unnecessary light.

Description

  The present technology relates to a technical field regarding a lens barrel and an imaging device. More specifically, the present invention relates to a technical field in which a light shielding member supported by a movable frame inserted inside a moving ring is provided to improve light shielding properties regarding unnecessary light.

  Various imaging devices, such as video cameras and still cameras, are provided with a lens barrel in which various optical components such as lenses and optical elements are arranged so as to be extendable and retractable. There is a so-called collapsible type that can be stored and taken out from the main body of the apparatus during photographing to change the zoom magnification.

  By providing such a telescopic lens barrel, it is possible to achieve both a reduction in size (thinning) during non-shooting and securing of good optical performance during shooting.

  In addition, there is a type in which an interchangeable lens provided as a lens barrel is detachable from the apparatus main body in the imaging apparatus.

  In such an interchangeable lens type imaging device, by replacing the interchangeable lens in accordance with the photographing situation, it becomes possible to photograph an image with a desired magnification and brightness, and the usability regarding photographing is improved. Can be planned.

  In the image pickup apparatus as described above, in the lens barrel, unnecessary light out of light incident inward to an image pickup element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor). In some cases, a light shielding member is provided to suppress the incidence of light (for example, see Patent Document 1).

  By suppressing the incidence of unnecessary light to the image sensor by the light shielding member, it is possible to improve the image quality by suppressing the occurrence of problems such as ghosts and flares.

  In the lens barrel described in Patent Document 1, an annular light shielding member is attached to a holding frame (lens frame) that holds a lens, and passes between the fixed barrel and the holding frame toward the image sensor. It is configured to shield unwanted light that is about to go.

JP 2003-140016 A

  However, in the lens barrel described in Patent Document 1, the light shielding member is attached to the holding frame in an outer fitting shape, and the light shielding member is positioned between the inner peripheral surface of the fixed barrel and the outer peripheral surface of the holding frame. Thus, a clearance for smoothly moving the holding frame with respect to the fixed barrel exists between the outer peripheral surface of the light shielding member and the inner peripheral surface of the fixed barrel.

  Therefore, unnecessary light may pass through the clearance existing between the outer peripheral surface of the light shielding member and the inner peripheral surface of the fixed barrel, and sufficient light shielding performance may not be ensured.

  Therefore, it is an object of the present technology lens barrel and imaging device to overcome the above-described problems and to improve the light shielding property regarding unnecessary light.

  First, in order to solve the above-described problem, at least a part of the lens barrel is inserted inside the drive ring and supported by the drive ring so as to be movable in the optical axis direction, and has an insertion hole. At least a part of the ring is inserted inside the moving ring and is supported by the drive ring so as to be movable in the optical axis direction, and is movable in the optical axis direction with respect to the moving ring and rotates in the direction around the optical axis. A movable frame that is made possible, and a light shielding member that is supported by the movable frame and at least partially inserted into the insertion hole of the moving ring.

  Therefore, in the lens barrel, at least a part of the light shielding member is positioned between the inner peripheral surface of the moving ring and the outer peripheral surface of the movable frame.

  Secondly, in the lens barrel described above, it is desirable that the light shielding member is supported by the movable frame so as to be rotatable in the direction around the optical axis and that the rotation of the moving ring around the optical axis is restricted. .

  The light shielding member is rotatably supported in the direction around the optical axis by the movable frame, and the movable ring is restricted from rotating in the direction around the optical axis by the moving ring. Is rotated with respect to the light shielding member.

  Third, in the lens barrel described above, the light shielding member is formed in a shape extending in the circumferential direction, and the light shielding member is provided with at least one light shielding portion and a connecting portion continuously in the circumferential direction, It is desirable that a light shielding portion is inserted into the insertion hole.

  The light shielding member is formed in a shape extending in the circumferential direction, and the light shielding member is provided with at least one light shielding portion and a connecting portion continuously in the circumferential direction, and the light shielding portion is inserted into the insertion hole, thereby The light shielding portion is positioned in the clearance between the inner peripheral surface and the outer peripheral surface of the movable frame.

  Fourthly, in the lens barrel described above, it is desirable that the opening edges on both sides in the circumferential direction of the insertion hole are formed as rotation restricting portions that restrict the rotation of the light shielding member in the direction around the optical axis.

  The opening edges on both sides in the circumferential direction of the insertion hole are formed as rotation restricting portions that restrict the rotation of the light shielding member in the direction around the optical axis, so that the light shielding member can be rotated by being inserted into the insertion hole. Be regulated.

  Fifth, in the above-described lens barrel, it is desirable that the light shielding member is formed in a shape extending in the circumferential direction, and can be elastically deformed so that the light shielding member bends inward.

  Since the light shielding member is formed in a shape extending in the circumferential direction and elastically deformable so that the light shielding member bends inward, it is not necessary to form a cutout for inserting the light shielding portion in the moving ring.

  Sixthly, in the lens barrel described above, it is desirable that the width of the connecting portion in the radial direction is smaller than the width of the light shielding portion in the radial direction.

  By making the width of the connecting portion in the radial direction smaller than the width of the light shielding portion in the radial direction, the connecting portion is easily bent.

  Seventhly, in the lens barrel described above, a slit is formed in the light shielding portion, an inner portion provided inside the slit in the light shielding portion is elastically deformable, and the inner portion is elastically deformed and elastically restored. Thus, it is desirable that the light shielding member is supported on the movable frame in an outer fitting manner.

  A slit is formed in the light shielding portion, an inner portion provided inside the slit in the light shielding portion can be elastically deformed, the inner portion is elastically deformed and elastically restored, and the light shielding member is supported on the movable frame in an outer fitting shape. Thus, there is no need to form a recess or hole for avoiding interference with the light shielding portion in the drive ring.

  Eighth, in the above-described lens barrel, it is desirable that the slit be formed in a shape extending in the circumferential direction.

  By forming the slit in a shape extending in the circumferential direction, the inner portion c is easily elastically deformed in the radial direction.

  Ninthly, in the lens barrel described above, it is preferable that the light shielding member is supported by an end portion on the object side in the optical axis direction of the movable frame.

  Since the light shielding member is supported by the end of the movable frame on the object side in the optical axis direction, it is not necessary to insert the light shielding member inserted into the holding cylinder portion up to the subject side of the movable frame.

  Tenth, in the lens barrel described above, it is desirable that the outer peripheral surface of the light-shielding portion of the light-shielding member is in contact with or close to the inner peripheral surface of the drive ring.

  Since the outer peripheral surface of the light-shielding portion of the light-shielding member is in contact with or close to the inner peripheral surface of the drive ring, unnecessary light that attempts to pass through the clearance formed between the drive ring and the moving ring is shielded by the light-shielding portion. Is done.

  11thly, in the above-mentioned lens barrel, it is desirable that the light shielding member is formed in an annular shape.

  By forming the light shielding member in an annular shape, it is possible to shield light at an arbitrary position on the entire circumference in the circumferential direction.

  12thly, in the above-mentioned lens barrel, it is desirable that the light shielding member is formed in a shape extending in the circumferential direction and having both ends in the circumferential direction.

  When the light shielding member is formed in a shape extending in the circumferential direction and having both ends in the circumferential direction, the entire light shielding member is easily bent so as to be displaced inward.

  In order to solve the above-described problem, the imaging apparatus includes a lens barrel in which an optical system is disposed, and an imaging element that converts an optical image captured via the optical system into an electrical signal, The lens barrel is inserted at least partially inside the drive ring and is supported by the drive ring so as to be movable in the optical axis direction, and has an insertion hole, and at least part of the lens barrel is inside the move ring. A movable frame that is inserted and supported by the drive ring so as to be movable in the optical axis direction, is movable in the optical axis direction with respect to the movable ring, and is rotatable around the optical axis, and is supported by the movable frame. And at least a part of which is provided with a light shielding member inserted into the insertion hole of the moving ring.

  Therefore, in the imaging device, at least a part of the light shielding member is positioned between the inner peripheral surface of the moving ring and the outer peripheral surface of the movable frame.

  The lens barrel of the present technology includes at least a part inserted inside the driving ring and supported by the driving ring so as to be movable in the optical axis direction, and having an insertion hole, and at least a part of the moving ring. A movable frame inserted inside and supported by the drive ring so as to be movable in the optical axis direction, movable in the optical axis direction with respect to the movable ring, and rotatable in a direction around the optical axis; and the movable frame And a light shielding member at least partially inserted into the insertion hole of the moving ring.

  Therefore, at least a part of the light shielding member is positioned between the inner peripheral surface of the moving ring and the outer peripheral surface of the movable frame, and the light shielding property regarding unnecessary light can be improved.

  In the technique described in claim 2, the light shielding member is supported by the movable frame so as to be rotatable in the direction around the optical axis, and the rotation of the movable ring in the direction around the optical axis is restricted.

  Therefore, the movable frame is rotated with respect to the light shielding member in a state where the rotation of the light shielding member is restricted by the moving ring, and it is possible to ensure a good light shielding property by the light shielding member without hindering the rotation operation of the movable frame. .

  In the technique according to claim 3, the light shielding member is formed in a shape extending in the circumferential direction, and the light shielding member is provided with at least one light shielding portion and a connecting portion continuously in the circumferential direction, A light shielding portion is inserted into the insertion hole.

  Therefore, the light shielding part is positioned in the clearance between the inner peripheral surface of the moving ring and the outer peripheral surface of the movable frame, and good light shielding properties can be ensured.

  In the technique described in claim 4, the opening edges on both sides in the circumferential direction of the insertion hole are formed as rotation restricting portions that restrict the rotation of the light shielding member in the direction around the optical axis.

  Therefore, since the rotation of the light shielding member is restricted by inserting the light shielding part into the insertion hole, there is no need for a separate restriction part for restricting the rotation of the light shielding member, and the rotation restriction mechanism increases the number of parts. It can comprise by a simple structure without accompanying.

  In the technique described in claim 5, the light shielding member is formed in a shape extending in the circumferential direction, and is elastically deformable so that the light shielding member bends inward.

  Therefore, it is not necessary to form a cutout for inserting the light shielding portion in the moving ring, and there is no gap when the cutout is formed between the moving ring and the movable frame, and unnecessary light is incident on the image sensor. It is difficult to improve the light shielding property.

  In the technique described in claim 6, the width of the connecting portion in the radial direction is smaller than the width of the light shielding portion in the radial direction.

  Therefore, the connecting portion is easily bent, and the assembling property of the light shielding member with respect to the moving ring can be improved.

  In the technique according to claim 7, a slit is formed in the light shielding portion, an inner portion provided inside the slit in the light shielding portion is made elastically deformable, and the inner portion is elastically deformed and elastically restored. Thus, the light shielding member is supported on the movable frame in an outer fitting shape.

  Therefore, it is not necessary to form a recess or hole for avoiding interference with the light shielding portion in the drive ring, and a gap due to the recess or hole is generated between the inner peripheral surface of the drive ring and the outer peripheral surface of the light shielding portion. Therefore, it is difficult for unnecessary light to be incident on the image sensor, and the light shielding property can be improved.

  In the technique described in claim 8, the slit is formed in a shape extending in the circumferential direction.

  Therefore, the inner portion can be easily elastically deformed in the radial direction, and the light shielding member can be more easily assembled to the movable frame.

  In the technique described in claim 9, the light shielding member is supported by the end of the movable frame on the object side in the optical axis direction.

  Therefore, it is not necessary to insert the light shielding member to the subject side of the movable frame, and the light shielding member can be easily assembled to the movable frame.

  In the technique described in claim 10, the outer peripheral surface of the light-shielding portion of the light-shielding member is in contact with or close to the inner peripheral surface of the drive ring.

  Accordingly, unnecessary light that attempts to pass through the clearance formed between the drive ring and the moving ring is blocked by the light blocking portion, and the light blocking property regarding unnecessary light can be further improved.

  In the technique described in claim 11, the light shielding member is formed in an annular shape.

  Therefore, light can be shielded at any position on the entire circumference in the circumferential direction, and high light shielding properties can be ensured.

  In the technique described in claim 12, the light shielding member is formed in a shape extending in the circumferential direction and having both ends in the circumferential direction.

  Therefore, it becomes easy to bend so that the whole may be displaced inside, and the assembly property to the moving ring can be further improved.

  An imaging apparatus according to an embodiment of the present technology includes a lens barrel in which an optical system is disposed, and an imaging element that converts an optical image captured through the optical system into an electrical signal. The lens barrel includes at least one lens barrel. A moving ring that is inserted inside the drive ring and supported by the drive ring so as to be movable in the optical axis direction, and has an insertion hole, and at least a portion is inserted inside the move ring and is inserted into the drive ring. A movable frame supported so as to be movable in the optical axis direction and movable in the optical axis direction with respect to the moving ring and rotatable in a direction around the optical axis, and supported at least in part by the movable frame. A light shielding member inserted into the insertion hole of the ring.

  Therefore, at least a part of the light shielding member is positioned between the inner peripheral surface of the moving ring and the outer peripheral surface of the movable frame, and the light shielding property regarding unnecessary light can be improved.

  The best mode for carrying out the present technology will be described below with reference to the accompanying drawings.

  In the best mode shown below, the imaging device of the present technology is applied to a still camera, and the lens barrel of the present technology is applied to a lens barrel provided as an interchangeable lens of the still camera.

  Note that the scope of application of the present technology is not limited to a still camera and a lens barrel provided as an interchangeable lens of the still camera. For example, various imaging devices incorporated in a video camera and other devices and these imaging devices The present invention can be widely applied to various lens barrels provided in the lens.

  In addition, the lens barrel is not limited to an interchangeable lens, and can be widely applied to a retractable type provided to be extendable and a type disposed inside an imaging apparatus. The imaging apparatus can also be widely applied to a retractable type in which a lens barrel is provided to be extendable and a type in which a lens barrel is disposed inside.

  In the following description, it is assumed that the front, rear, up, down, left, and right directions are shown as viewed from the photographer at the time of photographing with the still camera. Therefore, the subject side is the front and the photographer side is the rear.

  In addition, the following directions of front and rear, up, down, left, and right shown below are for convenience of explanation, and the implementation of the present technology is not limited to these directions.

[Configuration of imaging device]
The imaging device 1 is composed of a device body 2 and a lens barrel (interchangeable lens) 3 (see FIG. 1). Note that in an imaging apparatus of a type in which a lens barrel is incorporated inside the apparatus main body 2 or a retractable type, the imaging apparatus is configured only by the apparatus main body including the lens barrel.

  The apparatus main body 2 is configured by arranging necessary parts inside and outside the housing 4.

  Various input operation units 4 a, 4 a,... Are arranged on the upper surface of the housing 4. As the input operation units 4a, 4a,..., For example, a power button, a shutter button, a mode switching knob and the like are provided.

  Various input operation units and a display (not shown) are arranged on the rear surface of the housing 4. As the input operation unit, for example, a zoom switch, a mode switching knob, and the like are provided.

  A circular opening 4 b is formed on the front surface of the housing 4, and a portion around the opening 4 b is provided as a mount portion 4 c for attaching the lens barrel 3.

  An imaging element 5 such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) is disposed inside the housing 4, and the imaging element 5 is positioned behind the opening 4 b.

[Configuration of lens barrel]
The lens barrel 3 has an outer cylinder 6, and required parts are arranged inside the outer cylinder 6. A photographing lens 7 is attached to the front end portion of the outer cylinder 6.

  A lens unit 8 including a photographing lens 7 is disposed inside the outer cylinder 6. The lens unit 8 has a drive ring 9, a moving ring 10, and a movable frame 11 (see FIGS. 2 to 5).

  The drive ring 9 is formed in a substantially cylindrical shape whose axial direction is the front-rear direction, and the first cam grooves 9 a, 9 a, 9 a that are spaced apart in the circumferential direction are spaced apart from the first cam grooves 9 a, 9 a, 9 a. Cam grooves 9b, 9b, 9b. The second cam grooves 9b, 9b, 9b are formed on the rear side of the first cam grooves 9a, 9a, 9a, respectively.

  The drive ring 9 is movable in the optical axis direction and rotatable in the direction around the optical axis with respect to a fixed ring (not shown) constituting a part of the lens unit 8.

  The moving ring 10 has a holding cylinder portion 12 that is formed in a substantially cylindrical shape with the axial direction set in the front-rear direction, a flange portion 13 that protrudes outward from the front end portion of the holding cylinder portion 12, and a holding cylinder. The connecting surface portion 14 extends inward from the rear end portion of the portion 12 and is formed in a substantially annular shape, and the substantially cylindrical projecting tube portion 15 protrudes rearward from the inner peripheral portion of the connecting surface portion 14.

  The holding cylinder part 12 is provided with protrusions 12a, 12a, 12a protruding rearward from the rear end at equal intervals in the circumferential direction, and outward (radial direction) to the protrusions 12a, 12a, 12a, respectively. Projected cam pins 12b, 12b, 12b are provided.

  Insertion holes 16, 16, 16 are formed in the holding cylinder portion 12 at regular intervals in the circumferential direction.

  In the moving ring 10, the outer diameter of the holding cylinder portion 12 is slightly smaller than the inner diameter of the drive ring 9.

  The moving ring 10 holds an optical element such as a lens (not shown).

  The moving ring 10 is inserted into the drive ring 9 at a portion including the holding cylinder portion 12, and the cam pins 12b, 12b, 12b are slidably engaged with the second cam grooves 9b, 9b, 9b of the drive ring 9, respectively. Is done.

  When the drive ring 9 is rotated in the direction around the optical axis, the movable ring 10 is driven by the cam pins 12b, 12b, and 12b being slid into the second cam grooves 9b, 9b, and 9b and guided by guides (not shown). It is moved in the front-rear direction (optical axis direction) with respect to the ring 9. The moving ring 10 is moved in the front-rear direction along with the driving ring 9 when the driving ring 9 is moved in the optical axis direction.

  The movable frame 11 has a cylindrical portion 17 formed in a short substantially cylindrical shape whose axial direction is the front-rear direction. Engagement pins 17 a, 17 a, and 17 a that protrude outward (radial direction) are provided on the tubular portion 17 at regular intervals in the circumferential direction.

  Engagement protrusions 18, 18, 18 are provided at the front end of the movable frame 11 at regular intervals in the circumferential direction. The engagement protrusion 18 includes a base portion 18a extending in the front-rear direction and a locking portion 18b protruding outward from the front end portion of the base portion 18a (see FIG. 6). An inclined surface 18c that is displaced rearward as it goes outward is formed at the tip of the locking portion 18b (see FIGS. 2 to 5).

  The movable frame 11 has an outer diameter slightly smaller than the inner diameter of the holding cylinder portion 12 of the moving ring 10.

  The movable frame 11 holds an optical element such as a lens (not shown).

  The movable frame 11 is inserted into the holding cylinder portion 12 of the moving ring 10 (see FIGS. 3, 4, 5, and 8), and the engagement pins 17 a, 17 a, and 17 a are inserted into the insertion holes 16 of the moving ring 10, respectively. 16 and 16 are inserted and slidably engaged with the first cam grooves 9a, 9a and 9a of the drive ring 9.

  When the drive ring 9 is rotated, the movable frame 11 is slid in the first cam grooves 9a, 9a, 9a and guided by a straight guide (not shown) in the front-rear direction. Moved. Further, the movable frame 11 is moved in the front-rear direction along with the drive ring 9 when the drive ring 9 is moved in the optical axis direction.

  The movable frame 11 is rotated in the direction around the optical axis with respect to the moving ring 10 by a driving member (not shown).

  A light shielding member 19 is supported on the movable frame 11 so as to be rotatable around the optical axis. The light shielding member 19 is formed in a substantially annular shape, and the connecting portions 20, 20, 20 and the light shielding portions 21, 21, 21 are alternately and continuously formed (see FIGS. 2 and 7).

  The connecting portion 20 is formed in a narrow arc shape.

  The light shielding portion 21 has both ends in the circumferential direction of the inner peripheral portion continuous to the connecting portions 20 and 20, respectively, and the width in the radial direction is larger than that of the connecting portion 20. Therefore, the width of the connecting portion 20 in the radial direction is smaller than the width of the light shielding portion 21 in the radial direction. The inner peripheral part of the light-shielding part 21 is provided as a thin sliding part 21a whose thickness is thinner than other parts except for both end parts in the circumferential direction (see FIG. 9).

  An arcuate slit 20b extending in the circumferential direction is formed in the light shielding portion 21 (see FIGS. 7 and 9). The light-shielding portion 21 is configured such that an inner portion 20c that is an inner portion of the slit 20b can be elastically deformed in a radial direction with respect to an outer portion 20d that is an outer portion by the slit 20b. Further, the light-shielding portion 21 is configured such that the outer portion 20d can be elastically deformed in the radial direction relative to the inner portion 20c by the slit 20b.

  The light shielding member 19 is supported by the movable frame 11 in an outer fitting manner with the thin sliding portions 21 a, 21 a, 21 a of the light shielding portions 21, 21, 21 engaged with the engaging protrusions 18, 18, 18, respectively. The light shielding member 19 is supported by the movable frame 11 so as to be rotatable in the direction around the optical axis by sliding the thin sliding portions 21a, 21a, and 21a on the engaging projections 18, 18, and 18, respectively.

  The light shielding member 19 has an outer diameter connecting the outer circumferences of the connecting portions 20, 20, 20 substantially the same as the inner diameter of the holding cylinder portion 12 of the moving ring 10.

  The light shielding member 19 is inserted into the holding cylinder portion 12 of the moving ring 10 together with the movable frame 11, and the light shielding portions 21, 21, 21 are inserted into the insertion holes 16, 16, 16 of the holding cylinder portion 12, respectively. The lengths in the circumferential direction of the light shielding portions 21, 21, 21 are substantially the same as the widths in the circumferential direction of the insertion holes 16, 16, 16, respectively.

  When the drive ring 9 is rotated, the light shielding member 19 is moved in the front-rear direction together with the movable frame 11, and the rotation is restricted by the movable ring 10 when the movable frame 11 is rotated. Therefore, the light shielding member 19 is rotated relative to the movable frame 11 when the movable frame 11 is rotated.

  The light shielding member 19 is restricted from rotating around the optical axis when the light shielding portions 21, 21, 21 are in contact with the opening edges on both sides in the circumferential direction of the insertion holes 16, 16, 16. Therefore, the opening edges on both sides in the circumferential direction of the insertion holes 16, 16, 16 are formed as rotation restricting portions 16 a, 16 a,.

[Assembly of each part of lens barrel]
Below, the assembly | attachment of the drive ring 9, the moving ring 10, the movable frame 11, and the light shielding member 19 in the lens barrel 3 is demonstrated.

  First, the moving ring 10 is inserted into the drive ring 9 from the front, and the cam pins 12b, 12b, 12b of the holding cylinder part 12 are engaged with the second cam grooves 9b, 9b, 9b, respectively. At this time, the holding cylinder portion 12 is inserted into the drive ring 9 with the cam pins 12b, 12b, 12b removed, and in the inserted state, the cam pins 12b, 12b, 12b pass through the second cam grooves 9b, 9b, 9b, respectively. It is inserted and attached, and is engaged with the second cam grooves 9b, 9b, 9b, respectively.

  Next, the movable frame 11 is inserted into the holding cylinder portion 12 of the moving ring 10 from the front, and the engagement pins 17a, 17a, 17a are engaged with the first cam grooves 9a, 9a, 9a of the drive ring 9. At this time, the movable frame 11 is inserted into the movable ring 10 with the engagement pins 17a, 17a and 17a removed, and in the inserted state, the engagement pins 17a, 17a and 17a are respectively inserted into the first cam grooves 9a and 9a. 9a and the insertion holes 16, 16, and 16 are attached and engaged with the first cam grooves 9a, 9a, and 9a, respectively.

  Next, the light shielding member 19 is inserted into the holding cylinder portion 12 of the moving ring 10 from the front. At this time, the light shielding member 19 is inserted into the holding cylinder portion 12 while being appropriately elastically deformed and bent (see FIG. 10). For example, the light shielding portions 21, 21, 21 are elastically deformed to be bent inward one by one or two at a time, and the light shielding portions 21, 21, 21 are inserted into the insertion holes 16, 16, 16 of the holding cylinder portion 12. Then, the entire light shielding member 19 is inserted into the holding cylinder portion 12.

  As described above, the light shielding member 19 is formed in a shape extending in the circumferential direction, and is elastically deformable so as to bend inwardly. Therefore, the notch for inserting the light shielding portions 21, 21, 21 is provided at the front end of the moving ring 10. There is no need to form the part.

  Accordingly, there is no gap when a notch is formed between the moving ring 10 and the movable frame 11, and unnecessary light is hardly incident on the image pickup device 5, and the light shielding property can be improved.

  Further, since the width of the light shielding member 19 in the radial direction of the connecting portions 20, 20, and 20 is smaller than the width of the light shielding portions 21, 21, and 21 in the radial direction, the connecting portions 20, 20, and 20 are easily bent, and the light shielding is performed. The assembling property of the member 19 with respect to the moving ring 10 can be improved.

  Next, the light shielding member 19 is assembled to the movable frame 11 in a state where the light shielding portions 21, 21, 21 of the light shielding member 19 are respectively inserted into the insertion holes 16, 16, 16 of the holding cylinder portion 12. At this time, the light shielding portions 21, 21, and 21 are positioned such that the outer peripheral surfaces are in contact with or close to the inner peripheral surface of the drive ring 9.

  The light shielding member 19 can be assembled to the movable frame 11 by pressing the light shielding portion 21 against the inclined surface 18c of the engaging protrusion 18 from the front side (see FIGS. 11 to 13).

  When the light shielding portion 21 is pressed against the inclined surface 18c, the inner portion 21c of the light shielding portion 21 is elastically deformed so as to approach the outer portion 21d (see FIG. 11), and the thin sliding portion 21a is engaged with the engaging protrusion 18. It rides on the part 18b (refer FIG. 12). Further, when the light shielding portion 21 gets over the locking portion 18b, the inner side portion 21c is elastically restored, and the thin sliding portion 21a is engaged with the engaging protrusion 18 on the rear side of the locking portion 18b (see FIG. 13). ).

  By performing such an operation for all the light shielding portions 21, 21, 21, the light shielding portions 21, 21, 21 are engaged with the engaging protrusions 18, 18, 18, respectively, and the light shielding member 19 is attached to the movable frame 11. Assembled.

  In a state where the light shielding member 19 is assembled to the movable frame 11, the thin sliding portions 21 a, 21 a, and 21 a can be slid on the engaging protrusions 18, 18, and 18, respectively, and the light shielding member 19 is attached to the movable frame 11. It is supported rotatably.

  As described above, when the light shielding member 19 is attached to the movable frame 11, the light shielding member 19 is elastically deformed at the inner portions 21c, 21c, 21c of the light shielding portions 21, 21, 21 and the outer portions 21d, 21d, 21d are deformed, respectively. Therefore, it is not necessary to form a recess or a hole in the drive ring 9 for avoiding interference with the outer portions 21d, 21d, 21d.

  Accordingly, there is no gap between the inner peripheral surface of the drive ring 9 and the outer peripheral surfaces of the light shielding portions 21, 21, 21 due to the recesses or holes, and it is difficult for unnecessary light to enter the image sensor 5. It is possible to improve the performance.

  Further, since the light shielding member 19 is supported by the front end portion (the end portion on the object side in the optical axis direction) of the movable frame 11, the light shielding member 19 inserted into the holding cylinder portion 12 from the front is connected to the rear end side of the movable frame 11. The light shielding member 19 can be easily assembled to the movable frame 11.

  Further, since the slits 21b, 21b, 21b of the light shielding member 19 are formed in a shape extending in the circumferential direction, the inner portions 21c, 21c, 21c are easily elastically deformed in the radial direction, and the light shielding member 19 is assembled to the movable frame 11. The attachment can be performed more easily.

[Light shielding by light shielding member]
In the lens barrel 3 configured as described above, the movable frame 11 and the movable ring 10 are smoothly moved in the optical axis direction between the movable ring 10 and the movable frame 11 and between the drive ring 9 and the movable ring 10, respectively. Alternatively, there is a clearance for rotating around the optical axis. Therefore, when unnecessary light that is not involved in shooting or the like passes through these clearances during shooting or the like, the passed light may enter the image sensor 5 and cause a reduction in image quality.

  However, in the lens barrel 3, as described above, the light shielding member 19 is provided, and the light shielding portions 21, 21, 21 are respectively inserted into the insertion holes 16, 16, 16 formed in the holding cylinder portion 12 of the moving ring 10. Has been.

  Accordingly, unnecessary light (light A shown in FIG. 14) that attempts to pass through the clearance formed between the moving ring 10 and the movable frame 11 is shielded by the light shielding portions 21, 21, and 21. Incident to the element 5 is reduced.

  Further, in the lens barrel 3, the outer peripheral surfaces of the light shielding portions 21, 21, 21 of the light shielding member 19 are positioned in contact with or close to the inner peripheral surface of the drive ring 9.

  Accordingly, unnecessary light (light B shown in FIG. 14) that attempts to pass through the clearance formed between the drive ring 9 and the moving ring 10 is shielded by the light shielding portions 21, 21, and 21. Incident to the element 5 is reduced.

  The light shielding member 19 is formed in a thin shape in the front-rear direction, and even when the outer peripheral surface of the light shielding portions 21, 21, 21 is in contact with the inner peripheral surface of the drive ring 9, the contact area is extremely small. The influence on the moving operation and the rotating operation of the movable frame 11 with respect to the moving ring 10 due to the contact between the light shielding portions 21, 21, 21 and the driving ring 9 is reduced.

  Further, as described above, the light-shielding portions 21, 21, and 21 can be bent in the direction in which the outer portions 21d, 21d, and 21d approach the inner portions 21c, 21c, and 21c.

  Therefore, when the outer peripheral surface of the light shielding portions 21, 21, 21 is in contact with the inner peripheral surface of the drive ring 9 when the movable frame 11 is moved or rotated with respect to the moving ring 10, the light shielding portions 21, 21, 21 The outer portions 21d, 21d, and 21d can be bent in a direction approaching the inner portions 21c, 21c, and 21c, and the smooth operation of the movable frame 11 can be ensured.

[Others]
In the above description, the light shielding member 19 formed in an annular shape is shown as an example. However, the shape of the light shielding member is not limited to the annular shape. For example, as shown in FIG. It may be formed in a shape extending in the circumferential direction such as having both ends in the circumferential direction.

  By using a type formed in a shape having both ends in the circumferential direction such as the light shielding member 19A instead of the light shielding member 19, it becomes easy to bend so that the whole is displaced inward, and the assembly property to the moving ring 10 is improved. Further improvement can be achieved.

  Similarly to the case of the light shielding member 19, it is not necessary to form a notch for inserting the light shielding parts 21, 21, 21 at the front end of the moving ring 10, and a notch is formed between the moving ring 10 and the movable frame 11. There is no gap when formed, and it is difficult for unnecessary light to be incident on the image sensor 5, so that the light shielding property can be improved.

  Further, since the slits 21b, 21b, and 21b of the light shielding member 19A are formed in a shape extending in the circumferential direction, the inner portions 21c, 21c, and 21c are easily elastically deformed in the radial direction, and the light shielding member 19A is assembled to the movable frame 11. The attachment can be performed more easily.

[One Embodiment of Imaging Device]
FIG. 16 is a block diagram of an interchangeable lens type digital camera according to an embodiment of the imaging apparatus of the present technology.

  The imaging device (digital camera) 1 includes a camera block 30 that performs an imaging function, a camera signal processing unit 31 that performs signal processing such as analog-digital conversion of a captured image signal, and an image that performs recording and reproduction processing of the image signal. And a processing unit 32. In addition, the imaging apparatus 1 includes a display unit 33 such as an LCD (Liquid Crystal Display) that displays captured images and the like, and an R / W (reader / writer) that writes and reads image signals to and from the memory card 40. 34, a CPU (Central Processing Unit) 35 that controls the entire imaging apparatus 1, an input unit 36 that includes various input operation units 4a, 4a,. And a lens driving control unit 37 that controls driving of an optical element 30 a such as a lens or a lens group disposed in the camera block 30.

  The camera block 30 is provided in the lens barrel 3, for example, and has an optical system 30a such as a lens or a lens group.

  The camera signal processing unit 31 performs various signal processing such as conversion of the output signal from the image sensor 5 into a digital signal, noise removal, image quality correction, and conversion into a luminance / color difference signal.

  The image processing unit 32 performs compression encoding / decompression decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like.

  The display unit 33 has a function of displaying various data such as an operation state of the user input unit 36 and a photographed image.

  The R / W 34 writes the image data encoded by the image processing unit 32 to the memory card 40 and reads the image data recorded on the memory card 40.

  The CPU 35 functions as a control processing unit that controls each circuit block provided in the imaging apparatus 1, and controls each circuit block based on an instruction input signal or the like from the input unit 36.

  The input unit 36 outputs an instruction input signal corresponding to the operation by the user to the CPU 35.

  The lens drive control unit 37 controls a motor (not shown) that drives each lens of the optical system 30 a based on a control signal from the CPU 35.

  The memory card 40 is a semiconductor memory that can be attached to and detached from a slot connected to the R / W 34, for example.

  Hereinafter, the operation of the imaging apparatus 1 will be described.

  In the shooting standby state, under the control of the CPU 35, the image signal captured by the camera block 30 is output to the display unit 33 via the camera signal processing unit 31 and displayed as a camera through image. When an instruction input signal for zooming is input from the input unit 36, the CPU 35 outputs a control signal to the lens drive control unit 37, and a predetermined value of the optical system 30 a is controlled based on the control of the lens drive control unit 37. The lens or lens group is moved.

  When a shutter (not shown) of the camera block 30 is operated by an instruction input signal from the input unit 36, the captured image signal is output from the camera signal processing unit 31 to the image processing unit 32 and subjected to compression encoding processing. Converted to data format digital data. The converted data is output to the R / W 34 and written to the memory card 40.

  In focusing, for example, when the shutter button 4a of the input unit 36 is half-pressed or when the shutter button 4a is fully pressed for recording (photographing), the lens drive control unit 37 performs an optical system based on a control signal from the CPU 35. This is done by moving a predetermined lens or lens group 30a.

  When reproducing the image data recorded on the memory card 40, predetermined image data is read from the memory card 40 by the R / W 34 in response to an operation on the input unit 36, and decompressed and decoded by the image processing unit 32. After the processing is performed, the reproduced image signal is output to the display unit 33 and the reproduced image is displayed.

[Summary]
As described above, in the imaging device 1, at least a part of the moving ring 10 inserted inside the driving ring 9, and a movable frame 11 at least partly inserted inside the moving ring 10, Light shielding members 19 and 19A, which are supported by the movable frame 11 and at least partially inserted into the insertion holes 16, 16, and 16 of the moving ring 10, are provided.

  Therefore, at least a part of the light shielding members 19 and 19A is positioned between the inner peripheral surface of the moving ring 10 and the outer peripheral surface of the movable frame 11, and the light shielding property related to unnecessary light can be improved.

  Further, the light shielding members 19 and 19A are rotatably supported by the movable frame 11 in the direction around the optical axis, and the rotation of the movable ring 10 in the direction around the optical axis is restricted.

  Accordingly, the movable frame 11 is rotated with respect to the light shielding members 19 and 19A in a state where the rotation of the light shielding members 19 and 19A is restricted by the moving ring 10, and the light shielding members 19 and 19A are not affected by the rotating operation of the movable frame 11. A good light-shielding property by 19A can be ensured.

  Further, the light shielding members 19 and 19A are formed in a shape extending in the circumferential direction, and at least one light shielding portion 21, 21, and 21 and the connecting portions 20, 20, and 20 are continuously provided in the circumferential direction on the light shielding members 19 and 19A. The light shielding portions 21, 21, 21 are respectively inserted into the insertion holes 16, 16, 16 of the moving ring 10.

  Therefore, the light shielding portions 21, 21, and 21 are inserted into the insertion holes 16, 16, 16, respectively, so that the light shielding portions 21, 21 are formed in the clearance between the inner peripheral surface of the moving ring 10 and the outer peripheral surface of the movable frame 11. , 21 are reliably positioned, and good light shielding properties can be secured.

  Furthermore, rotation restricting portions 16a, 16a,... For restricting rotation of the light shielding members 19, 19A around the optical axis by opening edges on both sides in the circumferential direction of the insertion holes 16, 16, 16 formed in the movable ring 10.・ It is formed as

  Accordingly, since the light shielding portions 21, 21 and 21 of the light shielding members 19 and 19A are inserted into the insertion holes 16, 16 and 16, respectively, the rotation of the light shielding members 19 and 19A is restricted. A dedicated restricting portion for restricting rotation is not required, and the rotation restricting mechanism can be configured with a simple structure without increasing the number of parts.

  Further, in the lens barrel 3, the outer peripheral surfaces of the light shielding portions 21, 21, 21 of the light shielding members 19, 19 </ b> A are positioned in contact with or close to the inner peripheral surface of the drive ring 9.

  Therefore, unnecessary light that attempts to pass through the clearance formed between the drive ring 9 and the moving ring 10 is shielded by the light-shielding portions 21, 21, and 21, thereby further improving the light-shielding property related to unnecessary light. it can.

  In addition, since the light shielding member 19 is formed in an annular shape, light can be shielded at an arbitrary position on the entire circumference in the circumferential direction, and high light shielding properties can be ensured.

[Technology]
The present technology may be configured as follows.

  (1) At least a part is inserted inside the drive ring and supported by the drive ring so as to be movable in the direction of the optical axis and has an insertion hole, and at least a part is inserted inside the movement ring. A movable frame supported by the drive ring so as to be movable in the optical axis direction, movable in the optical axis direction with respect to the movable ring, and rotatable in a direction around the optical axis, and supported by the movable frame at least. A lens barrel including a light shielding member partially inserted into the insertion hole of the moving ring.

  (2) The lens barrel according to (1), wherein the light shielding member is supported by the movable frame so as to be rotatable in the direction around the optical axis and the rotation of the movable ring in the direction around the optical axis is restricted.

  (3) The light shielding member is formed in a shape extending in the circumferential direction, and the light shielding member is provided with at least one light shielding portion and a connecting portion continuously in the circumferential direction, and the light shielding portion is inserted into the insertion hole. The lens barrel according to any one of (1) and (2).

  (4) The lens barrel according to (3), wherein opening edges on both sides in the circumferential direction of the insertion hole are formed as a rotation restricting portion that restricts rotation of the light shielding member in the direction around the optical axis.

  (5) The lens barrel according to any one of (1) to (4), wherein the light shielding member is formed in a shape extending in a circumferential direction, and is elastically deformable so that the light shielding member bends inward.

  (6) The lens barrel according to (3), wherein a width of the coupling portion in the radial direction is smaller than a width of the light shielding portion in the radial direction.

  (7) A slit is formed in the light shielding portion, an inner portion provided inside the slit in the light shielding portion is elastically deformable, the inner portion is elastically deformed and elastically restored, and the light shielding member is moved to the movable frame. The lens barrel according to any one of (1) to (3), wherein the lens barrel is supported in an outer fitting shape.

  (8) The lens barrel according to (7), wherein the slit is formed in a shape extending in the circumferential direction.

  (9) The lens barrel according to any one of (1) to (8), wherein the light shielding member is supported by an end on the object side in the optical axis direction of the movable frame.

  (10) The lens barrel according to (3), wherein an outer peripheral surface of a light shielding portion of the light shielding member is in contact with or close to an inner peripheral surface of the drive ring.

  (11) The lens barrel according to any one of (1) to (10), wherein the light shielding member is formed in an annular shape.

  (12) The lens barrel according to any one of (1) to (10), wherein the light shielding member extends in a circumferential direction and has a shape having both ends in the circumferential direction.

  (13) A lens barrel having an optical system disposed therein and an image sensor that converts an optical image captured via the optical system into an electrical signal, wherein the lens barrel is at least partially driven. A moving ring inserted inside the ring and supported by the drive ring so as to be movable in the optical axis direction and having an insertion hole, and at least a part of the moving ring is inserted inside the movable ring and is inserted into the drive ring in the optical axis direction A movable frame that is supported so as to be movable to the movable ring and that is movable in the optical axis direction with respect to the movable ring and that is rotatable in the direction around the optical axis, and at least a part of the movable ring that is supported by the movable frame is inserted into the movable ring. An imaging apparatus comprising a light shielding member inserted into a hole.

  The specific shapes and structures of the respective parts shown in the best mode described above are merely examples of the implementation of the present technology, and the technical scope of the present technology is limited by these. It should not be interpreted in a general way.

The best mode of the present technology is shown together with FIGS. 2 to 16, and this diagram is a schematic perspective view of the imaging apparatus. It is a general | schematic disassembled perspective view which shows a part of internal structure of a lens-barrel. It is a general | schematic expansion perspective view which shows a part of internal structure of a lens-barrel. FIG. 4 is a schematic enlarged perspective view showing a part of the internal structure of the lens barrel when viewed from a direction different from FIG. 3. It is a general | schematic enlarged front view which shows a part of internal structure of a lens-barrel. It is an expansion perspective view of the engagement protrusion provided in the movable frame. It is an enlarged front view of a light shielding member. It is a general | schematic expanded sectional view in alignment with VIII-VIII shown in FIG. It is an expanded sectional view which shows a part of light shielding member. It is an enlarged front view which shows the state by which the light-shielding member was bent. 12 and 13 show the procedure for assembling the light shielding member to the movable frame, and this figure is an enlarged cross-sectional view showing a state in which the light shielding portion of the light shielding member is pressed against the engaging protrusion of the movable frame. . It is an expanded sectional view which shows the state which the light-shielding part got on the engagement protrusion. It is an expanded sectional view which shows the state in which the light-shielding part got over the engaging protrusion, and the light-shielding member was assembled | attached to the movable frame. It is an expanded sectional view showing the state where unnecessary light is shielded by the light shielding member. It is an enlarged front view which shows another example of a light shielding member. It is a block diagram of an imaging device.

  DESCRIPTION OF SYMBOLS 1 ... Imaging device, 3 ... Lens barrel, 5 ... Imaging element, 9 ... Drive ring, 10 ... Moving ring, 11 ... Movable frame, 16 ... Insertion hole, 16a ... Rotation restriction part, 19 ... Light-shielding member, 20 ... Connection Part, 21 ... light shielding part, 21b ... slit, 21c ... inner part, 19A ... light shielding member, 30a ... optical system

Claims (13)

A moving ring having at least a portion inserted inside the driving ring and supported by the driving ring so as to be movable in the optical axis direction and having an insertion hole;
At least a portion is inserted inside the moving ring and supported by the drive ring so as to be movable in the optical axis direction, and is movable in the optical axis direction and rotatable in the direction around the optical axis with respect to the moving ring. Movable frame,
A lens barrel comprising: a light shielding member supported by the movable frame and at least partially inserted into an insertion hole of the moving ring. The lens barrel according to claim 1, wherein the light shielding member is supported by the movable frame so as to be rotatable in the direction around the optical axis, and the rotation of the moving ring in the direction around the optical axis is restricted. The light shielding member is formed in a shape extending in the circumferential direction,
The light shielding member is provided with at least one light shielding portion and a connecting portion continuously in the circumferential direction,
The lens barrel according to claim 1, wherein the light shielding portion is inserted into the insertion hole. The lens barrel according to claim 3, wherein opening edges on both sides in the circumferential direction of the insertion hole are formed as a rotation restricting portion that restricts the rotation of the light shielding member in the direction around the optical axis. The light shielding member is formed in a shape extending in the circumferential direction,
The lens barrel according to claim 1, wherein the light shielding member is elastically deformable so as to bend inward. The lens barrel according to claim 3, wherein a width of the coupling portion in the radial direction is smaller than a width of the light shielding portion in the radial direction. A slit is formed in the light shielding part,
The inner part provided inside the slit in the light shielding part is made elastically deformable,
The lens barrel according to claim 3, wherein the inner portion is elastically deformed and elastically restored so that the light shielding member is supported on the movable frame in an outer fitting shape. The lens barrel according to claim 7, wherein the slit is formed in a shape extending in a circumferential direction. The lens barrel according to claim 1, wherein the light shielding member is supported by an end portion on the object side in the optical axis direction of the movable frame. The lens barrel according to claim 3, wherein an outer peripheral surface of a light shielding portion of the light shielding member is in contact with or close to an inner peripheral surface of the drive ring. The lens barrel according to claim 1, wherein the light shielding member is formed in an annular shape. The lens barrel according to claim 1, wherein the light shielding member extends in a circumferential direction and has a shape having both ends in the circumferential direction. A lens barrel in which an optical system is disposed, and an image sensor that converts an optical image captured via the optical system into an electrical signal;
The lens barrel is
A moving ring having at least a portion inserted inside the driving ring and supported by the driving ring so as to be movable in the optical axis direction and having an insertion hole;
At least a portion is inserted inside the moving ring and supported by the drive ring so as to be movable in the optical axis direction, and is movable in the optical axis direction and rotatable in the direction around the optical axis with respect to the moving ring. Movable frame,
An imaging apparatus comprising: a light shielding member that is supported by the movable frame and at least a part of which is inserted into an insertion hole of the moving ring.

Images