JP2017134387A - Lens barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel in which an adjustment portion of a lens frame has increased strength.SOLUTION: A lens barrel includes: a base frame 53 having a first through hole; an attaching plate 65 having a second through hole; a sixth group frame 61 that is placed inside the base frame 53 and to which a lens is fixed; and an adhesive 66 that fixes the sixth group frame 61 to the base frame 53. The attaching plate 65 is provided near the first through hole, and movably held by the base frame 53. The sixth group frame 61 includes a protrusion that radially protrudes with respect to an optical axis of the lens barrel, engages the second through hole, and is inserted into the first through hole. The protrusion is movable in the first through hole so as to change a position of the sixth group frame 61 relative to the base frame 53. The adhesive 66 is placed in the first through hole in the base frame 53, and fixes the protrusion of the sixth group frame 61, the base frame 53, and the attaching plate 65 to one another.SELECTED DRAWING: Figure 5C

Description

  The present disclosure relates to a lens barrel used for a digital still camera or the like.

  Patent Document 1 discloses a lens barrel that includes a lens holding member that holds a lens, a cylindrical barrel body, and a lens adjustment mechanism that adjusts the position of the lens holding member on the inner peripheral side of the barrel body. In this lens barrel, a plurality of through holes are provided on the outer peripheral surface of the lens barrel body, and a pin member is attached to the outer peripheral surface of the lens holding member through the through holes. The lens holding member is fixed to the lens barrel body with an adhesive filled around the pin member through a plurality of through holes.

JP 2010-191070 A

  The present disclosure provides a lens barrel having a robust configuration that adjusts and fixes the position of the lens frame with respect to the lens barrel.

  A lens barrel according to an aspect of the present disclosure includes a base frame having a first through hole, an adhesive plate having a second through hole, a lens frame disposed inside the base frame and having a lens fixed thereto, and a lens. And an adhesive fixing part for fixing the frame to the base frame. The adhesive plate is provided in the vicinity of the first through hole and is held by the base frame in a movable state. The lens frame has a protrusion that protrudes in the radial direction with respect to the optical axis of the lens barrel, engages with the second through hole, and is inserted into the first through hole. The protrusion is movable in the first through hole so as to change the position of the lens frame with respect to the base frame. The adhesive fixing portion is disposed in the first through hole of the base frame, and fixes the projection of the lens frame, the base frame, and the adhesive plate to each other.

  The lens barrel according to the present disclosure is effective in achieving a strong configuration that adjusts and fixes the position of the lens frame with respect to the lens barrel.

FIG. 1A is a perspective view illustrating an appearance of a lens barrel according to an embodiment. FIG. 1B is a side view showing the appearance of the lens barrel according to the embodiment. FIG. 1C is a front view showing the appearance of the lens barrel according to the embodiment. FIG. 2 is an exploded perspective view of the lens barrel according to the embodiment. FIG. 3 is a perspective view of the 4-6 group unit according to the embodiment. FIG. 4 is an exploded perspective view of the 4-6 group unit according to the embodiment. FIG. 5A is a front view for explaining an adjustment mechanism of the sixth group frame according to the embodiment. FIG. 5B is a side view for explaining the adjusting mechanism of FIG. 5A. 5C is a cross-sectional view taken along the line AA passing through the center of the fifth group base frame of FIG. 5A and extending in the radial direction. FIG. 5D is a developed cross-sectional view along the line BB extending in the circumferential direction of the fifth group base frame in FIG. 5A. FIG. 6 is an explanatory diagram illustrating a relationship between the fifth group base frame and the adhesive plate according to the first embodiment. FIG. 7A is a perspective view showing an eccentric pin according to the embodiment. FIG. 7B is a front view of the eccentric pin of FIG. 7A. FIG. 7C is a side view of the eccentric pin of FIG. 7A. FIG. 7D is a bottom view of the eccentric pin of FIG. 7A.

  The present inventor has reached the following knowledge regarding the technology described in the “Background Art” column. In Patent Document 1, since the adhesive is fixing the pin of the lens holding member to the lens barrel body in the through hole of the lens barrel body, the strength of the fixing portion is the strength of the adhesive between the through hole and the pin. Depends on. As a result, the fixing strength between the lens holding member and the barrel main body is lowered. That is, the strength of the adjustment portion of the lens barrel is reduced. Accordingly, the present inventor has found a lens barrel that improves the strength of the adjusting portion as follows.

  A lens barrel according to an aspect of the present disclosure includes a base frame having a first through hole, an adhesive plate having a second through hole, a lens frame disposed inside the base frame and having a lens fixed thereto, and the lens frame And an adhesive fixing part that fixes the frame to the base frame. The adhesive plate is provided in the vicinity of the first through hole and is held by the base frame in a movable state. The lens frame is a protrusion protruding in the radial direction with respect to the optical axis of the lens barrel, and the second through hole And a protrusion inserted into the first through hole. The protrusion is movable in the first through hole so as to change the position of the lens frame with respect to the base frame. The adhesive fixing portion is disposed in the first through hole, and fixes the projection of the lens frame, the base frame, and the adhesive plate to each other.

  In the above-described configuration, the adhesive fixing portion fixes the projection of the lens frame to the base frame via the adhesive plate. For this reason, the force which acts on the fixed part by the adhesive fixing part is distributed to the adhesive plate, and the stress acting on the adhesive fixing part becomes low. Furthermore, the fixing by the adhesive fixing part via the adhesive plate can increase the adhesive area. Therefore, the fixing strength of the lens frame with respect to the base frame is improved. That is, the strength of the adjustment unit in the lens barrel is improved.

  The lens barrel may further include an adjustment ring having an arcuate portion sandwiched between the base frame and the lens frame in the optical axis direction, and the thickness of the arcuate portion may vary in an angular direction centered on the optical axis. . In the above configuration, when the adjustment ring rotates in the angular direction together with the arcuate portion, the distance in the optical axis direction between the base frame and the lens frame changes. This makes it possible to adjust the position of the lens frame in the optical axis direction relative to the base frame.

  The gap between the projection of the lens frame and the second through hole may be smaller than the gap between the projection of the lens frame and the first through hole. Further, the second through hole may have the same shape and size as the outer periphery of the projection of the lens frame. In the above configuration, when the adhesive fixing portion is filled in the first through hole, the deviation of the adhesive fixing portion from the gap between the projection of the lens frame and the second through hole is reduced. Therefore, it is possible to fix with a sufficient amount of the adhesive fixing part.

  The projection of the lens frame has a first portion that is rotatably provided on the base side, and a second portion that is eccentric from the first portion on the distal end side and is provided to rotate integrally with the first portion. The second portion may be rotated to rotate the first portion and move the lens frame. In the configuration described above, the projection of the lens frame moves the lens frame in the radial direction of the rotation center axis of the second portion.

  The second through hole may have the same shape and size as the outer periphery of the second portion of the lens frame. In the above configuration, when the adhesive fixing portion is filled in the first through hole, the deviation of the adhesive fixing portion from the gap between the projection of the lens frame and the second through hole is greatly reduced. Further, the adhesive plate does not move with the rotation of the second portion.

  The adhesive plate may be held by the base frame in a movable state along the wall surface of the base frame in which the first through hole is provided. In the above-described configuration, it is possible to prevent the adhesive plate from changing the position of the protrusion accompanying the change in the position of the lens frame.

  The plurality of protrusions and the plurality of first through holes of the lens frame may be provided apart in the angular direction with the optical axis as the center. In the above-described configuration, the lens frame is subjected to a position change at a plurality of positions separated from each other. Therefore, precise position adjustment of the lens frame becomes possible.

  A lens barrel according to another aspect of the present disclosure includes a base frame, a lens frame that is disposed inside the base frame and to which the lens is fixed, and is sandwiched between the base frame and the lens frame in the optical axis direction of the lens barrel. And an adjustment ring provided with the arc-shaped portion, and the thickness of the arc-shaped portion in the optical axis direction changes in the angular direction with the optical axis as the center. In the above configuration, when the adjustment ring rotates in the angular direction together with the arcuate portion, the distance in the optical axis direction between the base frame and the lens frame changes. This makes it possible to adjust the position of the lens frame in the optical axis direction relative to the base frame.

  At least one of the base frame and the lens frame may partially contact the adjustment ring. Furthermore, at least one of the base frame and the lens frame may have a protrusion that contacts the adjustment ring. With the above-described configuration, even if the adjustment ring is warped, deformed, such as bent or distorted, at least one of the base frame and the lens frame can be in contact with the adjustment ring. Furthermore, the contact via the protrusions makes it possible to maintain a reliable contact with the adjustment ring, unlike surface contact.

  The lens barrel may further include a biasing spring that biases at least one of the base frame and the lens frame toward the adjustment ring. With the above-described configuration, the state in which the adjustment ring is in contact with the lens frame can be maintained, so that stable adjustment by the adjustment ring is possible.

  The base frame has a frame portion and a protrusion protruding from the frame portion in a direction intersecting the optical axis. The arc-shaped portion of the adjustment ring is sandwiched between the protrusion and the lens frame. The lens frame may be biased toward the protrusion between the portion and the lens frame. In the above-described configuration, the adjustment ring, the lens frame, and the urging spring can be accommodated in the frame portion, and the lens barrel can be downsized.

  The adjustment ring may have a plurality of arcuate portions that are spaced apart from each other in the angular direction about the optical axis. With the above-described configuration, the lens frame can be moved uniformly by the plurality of arc-shaped portions.

  Hereinafter, the lens barrel according to the embodiment will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The applicant provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is not intended to limit the subject matter described in the claims. Absent.

(Embodiment)
Hereinafter, the lens barrel 100 according to the embodiment will be described with reference to FIGS. 1A to 7D.

[1. Lens barrel configuration]
1A to 1C are views showing an external appearance of a lens barrel 100 according to an embodiment. 1A is a perspective view of the lens barrel 100, FIG. 1B is a side view of the lens barrel 100, and FIG. 1C is a front view of the lens barrel 100. The lens barrel 100 includes a mount portion 109 for fixing the lens barrel to the camera, and an operation portion 108 for performing operations such as zooming and focusing. The lens barrel 100 moves an internal lens group by operating an operation unit 108 provided on the lens barrel or by following a command sent as an electrical signal from the camera. Thereby, the lens barrel 100 performs zooming and focus adjustment to the angle of view intended by the user. 1A to 1C show a state in which a tripod seat 90 for fixing the lens barrel 100 to a tripod is attached to the lens barrel 100. FIG.

  FIG. 2 is an exploded perspective view of the lens barrel 100 according to the embodiment, and shows a state where the tripod seat 90 is attached to the lens barrel 100. The lens barrel 100 includes a first group unit 101 having a fixed lens, a second group unit 102 to which a zoom lens is fixed, a third group unit 103 to which a zoom lens is fixed, and an image shake correction device. A 6-group unit 104 and a 7-9 group unit 105 with a built-in focus lens are provided. Further, the lens barrel 100 includes a first fixed frame 106, a second fixed frame 107, and a light shielding frame unit 111. The group unit constitutes a lens unit and is provided inside the exterior member 112 together with the first fixed frame 106 and the second fixed frame 107.

  The second group unit 102 and the third group unit 103 are engaged with a cam mechanism provided on the inner periphery of the first fixed frame 106, and move forward and backward in the optical axis direction of the lens barrel 100. Change the focal length of the lens unit.

  The 7-9th group unit 105 has a built-in focus motor that moves the focus lens in the optical axis direction, and moves the focus lens in response to an electrical command.

  The 4-6 group unit 104 is equipped with an image blur correction lens and an actuator for moving the image blur correction lens. The 4-6 group unit 104 performs an operation to cancel the image blur by moving the image blur correction lens on a plane perpendicular to the optical axis in accordance with the electrical signal.

  The second fixed frame 107 constitutes the base of the entire lens barrel 100. The 7-9 group unit 105 is provided on the inner peripheral side of the second fixed frame 107. The 4-6 group unit 104 and the first fixed frame 106 are arranged on the front side in the optical axis direction of the second fixed frame 107. The mount 109 is fixed to the rear side of the second fixed frame 107 in the optical axis direction.

  The light shielding frame unit 111 plays a role of blocking unnecessary light incident on the second group unit 102 from its outer peripheral portion.

[Configuration of 2.4-6 group unit]
Details of the 4-6 group unit 104 will be described below. FIG. 3 is a perspective view of the 4-6 group unit according to the embodiment, and FIG. 4 is an exploded perspective view of the 4-6 group unit according to the embodiment.

  As shown in FIG. 4, the 4-6 group unit 104 includes a 4 group unit 40, a 5 group unit 50, a 6 group unit 60, and a 6 group adjustment ring 62. The fourth group unit 40 includes a lens frame 41 to which the lens is fixed, a lens frame 43 to which the lens is fixed, and a diaphragm unit 42 that adjusts the amount of light incident on the lens. The fifth group unit 50 includes an OIS (Optical Image Stabilization) magnet unit 51 that is a part of an actuator that drives the image blur correction lens, an OIS frame 52 to which the image blur correction lens is fixed, and an entire 4-6 group unit. A base frame 53 serving as a base is included. The sixth group unit 60 includes a sixth group frame 61 (an example of a lens frame) to which a lens is fixed. The sixth group adjustment ring 62 is an adjustment ring for adjusting the position of the lens of the sixth group portion 60 in the optical axis direction.

  In the present embodiment, the sixth group frame 61 is configured so that the position can be adjusted. For example, the sixth group frame 61 is intentionally shifted from the position of the design center and fixed, thereby canceling the influence of errors (for example, manufacturing tolerances) and assembly errors (for example, variations) of each part. As a result, the optical performance of the entire lens barrel 100 can be improved.

[Detailed Description of 3.6 Group Frame Position Adjustment Mechanism]
Hereinafter, the configuration of the position adjustment of the sixth group frame 61 will be described in detail with reference to FIGS. 5A to 7D.

  5A to 5D are explanatory diagrams of the adjusting mechanism of the sixth group frame 61 according to the embodiment. FIG. 5A is a front view for explaining the adjusting mechanism of the sixth group frame 61 according to the embodiment. FIG. 5B is a side view for explaining the adjusting mechanism of FIG. 5A. FIG. 5C is a cross-sectional view taken along the line AA passing through the center of the fifth group base frame 53 of FIG. 5A and extending in the radial direction. FIG. 5D is a developed view of a cross section taken along line BB extending in the circumferential direction of the fifth group base frame 53 of FIG. 5A.

  In the present embodiment, the relative position of the sixth group frame 61 with respect to the base frame 53 can be adjusted with respect to the positions of the following two items.

(I) Relative position on the surface perpendicular to the optical axis of the lens barrel 100 (the amount of eccentricity and the direction of eccentricity)
(Ii) Relative position of the lens barrel 100 in the optical axis direction

  Hereinafter, the mechanism for adjusting the position of these two items will be described in order.

  First, a relative position adjustment mechanism (related to item (i)) on a plane perpendicular to the optical axis will be described.

  Referring to FIGS. 4, 5B and 5C, the base frame 53 has a cylindrical shape. The base frame 53 integrally includes a cylindrical side wall 531 and an annular plate-shaped partition wall 532 located in the middle of the optical axis direction in the side wall 531. The partition wall 532 extends substantially perpendicular to the optical axis and has an opening at the center thereof. A plurality of adjustment holes 53 a penetrating from the inner peripheral surface of the side wall 531 to the outer peripheral surface are formed in the side wall 531 of the base frame 53. The adjustment hole 53a has a longer shape in the optical axis direction, and in the present embodiment, the adjustment hole 53a is an oblong slot having the optical axis direction as a longitudinal direction. In the present embodiment, three adjustment holes 53 a including a portion not shown are equally arranged in the circumferential direction of the side wall 531. The shape, quantity and arrangement of the adjustment holes 53a are not limited to the above, and can be arbitrarily selected. Here, the adjustment hole 53a is an example of a first through hole, and the side wall 531 and the partition wall 532 of the base frame 53 are an example of a frame portion of the base frame.

  FIG. 6 is an explanatory diagram showing the relationship between the fifth group base frame 53 and the adhesive plate 65 according to the embodiment. Referring to FIG. 6, a rectangular flat plate-shaped adhesive plate 65 is provided in the vicinity of each adjustment hole 53 a inside the side wall 531 of the base frame 53. The adhesive plate 65 is formed with a circular hole 65a penetrating therethrough. In the vicinity of each adjustment hole 53a, two protrusions 53ba that integrally protrude from the inner peripheral surface of the side wall 531 form two opposing slits 53b between the inner peripheral surface. The protrusions 53ba and the slits 53b are formed on both sides of each adjustment hole 53a in the circumferential direction of the side wall 531 and extend in the optical axis direction. Both side portions of each adhesive plate 65 are inserted into two opposing slits 53b and are held by the protrusions 53ba. As a result, the adhesive plate 65 held by the protrusion 53ba is positioned facing the adjustment hole 53a, and is movable in the optical axis direction along the inner peripheral surface of the side wall 531. Here, the hole 65a of the adhesive plate 65 is an example of a second through hole.

  Referring to FIGS. 5B and 5C, three cylindrical eccentric pins 63 are arranged to engage with the outer peripheral edge of the annular group of six-group frame 61, and the screw 64 with washer It is fixed to the outer periphery. The three eccentric pins 63 are equally disposed in the circumferential direction of the outer peripheral edge of the sixth group frame 61 and project in the radial direction of the sixth group frame 61. The positions of the three eccentric pins 63 correspond to the positions of the three adjustment holes 53 a of the base frame 53. In order for the sixth group frame 61 to be assembled to the base frame 53, each eccentric pin 63 of the sixth group frame 61 is inserted into the hole 65a of each adhesive plate 65, and further inserted into each adjustment hole 53a of the base frame 53, Then, it is fixed to the sixth group frame 61. Here, the eccentric pin 63 fixed to the outer peripheral edge of the sixth group frame 61 by the screw 64 is an example of a protrusion.

  The configuration of the eccentric pin 63 will be described with reference to FIGS. 5B, 5C and 7A to 7D. 7A shows a perspective view of the eccentric pin 63 according to the embodiment, FIG. 7B shows a front view of the eccentric pin 63 of FIG. 7A, FIG. 7C shows a side view of the eccentric pin 63 of FIG. 7A, and FIG. A bottom view of eccentric pin 63 of Drawing 7A is shown. The eccentric pin 63 has a hole 63a into which a screw 64 is inserted. The center of the hole 63 a is arranged at a position shifted from the center of the peripheral shape (circular shape) of the eccentric pin 63. The eccentric pin 63 integrally includes a cylindrical first portion 63b positioned on the base side and a cylindrical second portion 63c positioned on the distal end side. The first portion 63b is located on the sixth group frame 61 side, and the second portion 63c is located on the base frame 53 side. In the present embodiment, the outer diameter center of the first portion 63b and the outer diameter center of the second portion 63c are intentionally shifted in these radial directions. That is, the axis of the second portion 63c is located eccentrically in the radial direction from the axis of the first portion 63b. The first portion 63 b engages with a cylindrical recess formed on the outer peripheral edge of the sixth group frame 61. The second portion 63 c is inserted into the hole 65 a of the adhesive plate 65 and the adjustment hole 53 a of the base frame 53. The screw 64 passes through a hole 63a formed in the first portion 63b. Therefore, the second portion 63c of the eccentric pin 63 is also located eccentrically in the radial direction from the screw 64.

  5B and 5C, in the present embodiment, the hole 65a of the adhesive plate 65 is formed in the same shape and size as the second portion 63c of the eccentric pin 63, as will be described later. The adjustment hole 53a of the base frame 53 is formed with a dimension larger than the diameter of the second part 63c in the longitudinal direction, and is formed with a dimension equivalent to the diameter of the second part 63c in the short direction. Therefore, the gap between the second portion 63c and the hole 65a is smaller than the gap between the second portion 63c and the adjustment hole 53a.

  When the screw 64 is loosened by a predetermined amount from the fully tightened state, the eccentric pin 63 is loosely fastened to the sixth group frame 61 while being pressed against the sixth group frame 61 by the spring property of the washer. . Thereby, the eccentric pin 63 can rotate with respect to the sixth group frame 61 around the screw 64 and the first portion 63b. At this time, when the second portion 63c of the eccentric pin 63 is rotated about its axis, the first portion 63b and the screw 64 are eccentrically rotated from these axes, that is, the second portion 63c. Revolve around the axis of the center. As a result, the sixth group frame 61 with which the first portion 63 b engages is displaced in the circumferential direction of the side wall 531 of the base frame 53. Therefore, the positional relationship between the axis of the sixth group frame 61 and the axis of the base frame 53 changes. Note that the adhesive plate 65 engaged with the second portion 63c does not move. Further, by adjusting the rotation angle of the eccentric pins 63 at three locations, the base frame 53 on the plane perpendicular to the axis of the sixth group frame 61, that is, on the plane perpendicular to the optical axis of the sixth group frame 61. The relative position (the amount of eccentricity and the direction of eccentricity) of the sixth group frame 61 with respect to can be adjusted.

  Next, a mechanism for adjusting the position in the optical axis direction (related to item (ii)) will be described.

  Referring to FIGS. 5D and 6, the sixth group frame 61 is urged in the optical axis direction by three urging springs 67 with respect to the base frame 53. A plurality of protrusions 53c are integrally formed on the side wall 531 of the base frame 53, and the plurality of protrusions 53c protrude radially inward from the inner peripheral surface of the side wall 531 in a direction intersecting the optical axis. To do. In the present embodiment, three protrusions 53c are provided. The three protrusions 53 c are arranged away from the partition wall 532 of the base frame 53 in the optical axis direction, and are equally arranged at intervals in the circumferential direction of the side wall 531. Each protrusion 53 c is integrally provided with a protrusion 53 d that protrudes in the optical axis direction toward the partition wall 532. A sixth group frame 61 is disposed between the three protrusions 53 c and the partition wall 532. Furthermore, three spring shaft portions 532a extending in a direction toward the protrusion 53c are integrally formed on the partition wall 532. Each biasing spring 67 is disposed on the spring shaft portion 532a. In the present embodiment, the urging spring 67 is a coil spring, but is not limited thereto, and may be a spring having an arbitrary configuration. The distal end of the spring shaft portion 532a is loosely engaged with the sixth group frame 61 to position the sixth group frame 61 roughly.

  In addition, an annular plate-shaped sixth group adjustment ring 62 is disposed between the three protrusions 53 c and the sixth group frame 61. As a result, the sixth group adjustment ring 62 is sandwiched between the projection 53c and the sixth group frame 61. The sixth group frame 61 is integrally provided with a plurality of protrusions 61 a that protrude in the optical axis direction toward the sixth group adjustment ring 62. In the present embodiment, the three protrusions 61 a are equally arranged in the circumferential direction of the sixth group frame 61. The position of each protrusion 61 a corresponds to the position of the protrusion 53 d of the protrusion 53 c of the base frame 53. The protrusion 61a of the sixth group frame 61 and the protrusion 53d of the protrusion 53c are positioned so as to face each other, for example. The protrusions 61 a and 53 d are in contact with the sixth group adjustment ring 62 from both sides, and sandwich the sixth group adjustment ring 62. Thereby, it is suppressed that the 6th group frame 61 and the protrusion 53c are in surface contact with the 6th group adjustment ring 62. Therefore, even if the sixth group frame 61 or the sixth group adjustment ring 62 is warped and deformed such as bending or distortion, the sixth group frame 61 and the protrusion 53c are in contact with the sixth group adjustment ring 62 through the protrusions 61a and 53d. can do. Further, the contact state is maintained by the urging of the urging spring 67. In addition, the sixth group frame 61, the sixth group adjustment ring 62, and the biasing spring 67 can be accommodated in the side wall 531 of the base frame 53 by the configuration in which the protrusion 53 c and the sixth group frame 61 sandwich the sixth group adjustment ring 62.

  As described above, the sixth group frame 61 is configured to be pressed against the base frame 53 with the sixth group adjustment ring 62 interposed therebetween.

  The surface in contact with the protrusion 61a of the sixth group frame 61 in the sixth group adjustment ring 62 is a flat surface, specifically, a flat surface. On the other hand, the surface of the sixth group adjusting ring 62 that contacts the protrusion 53d of the base frame 53 forms an inclined surface 62a that is inclined with respect to the surface that contacts the protrusion 61a. The inclined surface 62 a extends in an arc shape in the angular direction around the optical axis, specifically, along the circumferential direction of the sixth group adjustment ring 62. A portion of the sixth group adjustment ring 62 where the inclined surface 62 a is formed forms an arc-shaped portion of the sixth group adjustment ring 62. The inclined surface 62a is inclined so that the thickness in the optical axis direction of the sixth group adjustment ring 62 changes gradually in the circumferential direction of the sixth group adjustment ring 62, for example, gently and continuously at a constant rate. doing. The three inclined surfaces 62a are equally arranged in the circumferential direction of the sixth group adjustment ring 62 so as to correspond to the positions of the three protrusions 53c. Further, the inclination directions of the three inclined surfaces 62 a in the circumferential direction of the sixth group adjustment ring 62 are the same.

  Here, when the sixth group adjustment ring 62 is rotated around the optical axis, the thickness of the portion sandwiched between the protrusion 61a of the sixth group frame 61 and the protrusion 53d of the protrusion 53c of the base frame 53 changes. The distance between the sixth group frame 61 and the protrusion 53c changes. Therefore, the position of the sixth group frame 61 in the optical axis direction changes with respect to the protrusion 53c. By adjusting the rotation angle of the sixth group adjustment ring 62, the position of the sixth group frame 61 in the optical axis direction can be adjusted. In addition, since the inclined surface 62a and the protrusions 61a and 53d are equally arranged, the entire sixth group frame 61 moves substantially parallel to the optical axis direction as the sixth group adjustment ring 62 rotates. Can do. Further, the adjustment portion of the sixth group adjustment ring 62 in which the inclined surface 62a is formed is configured to be sandwiched between the projection 61a of the sixth group frame 61 and the projection 53d of the base frame 53, and high strength is not required. The adjustment ring 62 can be thinned.

The method of adjusting the position in the optical axis direction of the sixth group frame 61 using the sixth group adjustment ring 62 whose thickness changes in the circumferential direction is excellent in the following points.
-Since the position of the 6-group frame 61 in the optical axis direction is determined only by the thickness distribution of the 6-group adjustment ring 62, even if the 6-group adjustment ring is warped, deformed, such as bent or distorted, the adjustment accuracy is almost affected. Absent.
-Since the shape of the 6-group adjusting ring 62 is simple, it is easy to produce the 6-group adjusting ring 62 in large quantities by a manufacturing method such as resin molding.
The configuration for position adjustment is a configuration in which the thin six-group adjustment ring 62 and the biasing spring 67 are used, so that the necessary space is reduced.

  As described above, according to the configuration of the present embodiment, it is possible to adjust the position of the sixth group frame 61 in the optical axis direction with high accuracy with a simple configuration.

  As described above, according to the adjustment mechanism according to the present embodiment, with respect to the relative position of the sixth group frame 61 with respect to the base frame 53, adjustment on a plane perpendicular to the optical axis is possible by rotating the eccentric pin 63. By adjusting the rotation angle of the sixth group adjustment ring 62, adjustment in the optical axis direction is possible. Each adjustment can be performed independently. In other words, regarding the adjustment of the relative position of the sixth group frame 61, the position in the optical axis direction does not change when adjusting the amount of eccentricity and the direction of eccentricity. Similarly, regarding the adjustment of the relative position of the sixth group frame 61, when the position in the optical axis direction is adjusted, the amount of eccentricity and the direction of eccentricity do not change.

[Detailed Description of 4.6 Group Frame Fixing Method]
As shown in FIG. 6, the adhesive plate 65 is inserted into a slit 53 b formed in the inner peripheral portion of the side wall 531 of the base frame 53. Accordingly, the adhesive plate 65 can freely move in the optical axis direction with respect to the base frame 53, but the movement is restricted in other directions.

  The hole 65 a of the adhesive plate 65 is opened with a diameter slightly larger than the outer diameter of the eccentric pin 63. That is, the diameter of the hole 65 a of the adhesive plate 65 is equal to the outer diameter of the eccentric pin 63. Each eccentric pin 63 is inserted into each adjustment hole 53 a of the base frame 53 in a state of being inserted into and engaged with the hole 65 a of each adhesive plate 65. At this time, since each adjustment hole 53 a is a long hole, each eccentric pin 63 can move in the optical axis direction together with the adhesive plate 65. 5C, after the eccentric pin 63 and the sixth group adjustment ring 62 are rotated to adjust the position of the sixth group frame 61 with respect to the base frame 53, the adjustment hole 53a, the eccentric pin 63 and the base frame 53 are adjusted. A region surrounded by the adhesive plate 65 is filled with an ultraviolet curable adhesive 66. The adhesive 66 fixes the sixth group frame 61 to the base frame 53 by being cured by receiving ultraviolet rays. Specifically, the cured adhesive 66 achieves the above-described fixation by fixing the base frame 53, the eccentric pin 63, and the adhesive plate 65 to each other. Note that the adhesive used is not limited to an ultraviolet curable adhesive, and may be any adhesive. Here, the cured adhesive 66 is an example of an adhesive fixing portion.

  The use of the adhesive plate 65 for the adhesive portion brings about the following effects.

  The first point is the stability of adhesive application.

  When there is no adhesive plate 65, the adhesive is filled in a large gap formed between the adjustment hole 53 a of the base frame 53 and the eccentric pin 63, and it is necessary to fix the eccentric pin 63 to the base frame 53. For this purpose, a method such as bridging a gap in the adhesive using an adhesive having a high viscosity is required. In this case, it is difficult to stably apply the adhesive, and in the worst case, the adhesive protruding from the inner peripheral portion of the side wall 531 of the base frame 53 remains uncured. And there exists a possibility that malfunctions, such as uncured adhesive flowing out afterwards and adhering to a surrounding movable part, may occur.

  On the other hand, when the adhesive plate 65 is provided, the gap formed between the adjustment hole 53a of the base frame 53 and the eccentric pin 63 is covered by the adhesive plate 65 on one of the both sides. For this reason, even an adhesive having a relatively low viscosity can be applied in the gap, and the workability of applying the adhesive is improved. In addition, since there is no fear that the adhesive protrudes to the inner peripheral portion of the side wall 531 of the base frame 53, a problem associated with the protrusion of the adhesive does not occur.

  Next, the second point is strength.

  When there is no adhesive plate 65, there is only an adhesive between the adjustment hole 53 a of the base frame 53 and the eccentric pin 63. That is, only the adhesive in the gap between the adjustment hole 53 a and the eccentric pin 63 constitutes a fixing portion for the base frame 53 and the eccentric pin 63. For this reason, after the fixing, when an external force such as a drop impact is applied to the fixed portion, the strength of the cured adhesive becomes the strength of the fixed portion as it is. Therefore, the strength of the fixed portion is reduced.

  On the other hand, when the adhesive plate 65 is provided, the adhesive fixes the base frame 53 and the eccentric pin 63 via the adhesive plate 65, and the adhesive and the adhesive plate 65 constitute a fixed portion. For this reason, the adhesive can have a wide adhesive area extending between the adhesive plate 65 and the base frame 53 and between the adhesive plate 65 and the eccentric pin 63. Even if an external force such as a drop impact is applied to the fixed portion, the force is dispersed on the adhesive plate 65 and the stress acting on the adhesive is low, so that the fixing strength is improved as compared with the case of the adhesive alone. Further, since there is no fear that the adhesive protrudes to the inner peripheral portion of the side wall 531 of the base frame 53, a sufficient amount of adhesive can be used for fixing. For this reason, the sixth group frame 61 can be firmly fixed to the base frame 53, and the strength of the fixed portion is improved. As described above, the strength of the adjustment portion of the lens frame can be improved.

  As described above, by interposing the adhesive plate 65 in the adhesive portion, the application of the adhesive is stabilized and the fixing strength can be improved.

  In the above embodiment, the example in which the eccentric pin 63 is bonded and fixed to the base frame 53 has been described, but the present invention is not limited to this.

  For example, an adjustment hole 53a and another through hole are provided in the base frame 53, a protrusion different from the eccentric pin 63 is provided in a portion facing the through hole in the sixth group frame 61, and the protrusion is bonded and fixed to the through hole. You may do it.

  Although the adhesive plate 65 is not particularly described in detail, the adhesive plate 65 can be manufactured by punching a metal thin plate by press processing, or can be manufactured by a method such as metal cutting or resin molding. Regarding the shape of the adhesive plate 65, in the present embodiment, an example of a rectangular flat plate-like adhesive plate is shown, but the same effect can be obtained with adhesive plates of other shapes.

(Other embodiments)
As described above, the embodiments have been described as examples of the technology in the present disclosure. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said embodiment and the following other embodiment into a new embodiment. Therefore, other embodiments will be exemplified below.

  In the lens barrel 100 according to the embodiment, the configuration for adjusting the position of the sixth group frame 61 in the optical axis direction and the direction perpendicular to the optical axis is provided. It may be applied to any site where position adjustment is required.

  In the lens barrel 100 according to the embodiment, the urging spring 67 urges the sixth group frame 61 toward the sixth group adjustment ring 62 and the base frame 53, but is not limited thereto. The biasing spring may be configured to bias the base frame 53 to the sixth group adjustment ring 62 and the sixth group adjustment frame 61, and to bias the sixth group frame 61 and the base frame 53 to the sixth group adjustment ring 62. May be configured.

  As described above, the embodiments and other embodiments are provided by the attached drawings and the detailed description. These are provided to those skilled in the art to illustrate the claimed subject matter by reference to specific embodiments. Therefore, the constituent elements described in the accompanying drawings and the detailed description may include not only the constituent elements essential for solving the problem but also other constituent elements. Therefore, just because those non-essential components are described in the accompanying drawings and detailed description, the non-essential components should not be recognized as essential immediately. Various modifications, replacements, additions, omissions, and the like can be made to the above-described embodiments within the scope of the claims and the equivalent scope thereof.

  The present disclosure can be applied to a lens barrel used in a digital still camera or the like.

100 lens barrel 101 first group unit 102 second group unit 103 third group unit 104 4-6 group unit 105 7-9 group unit 106 fixed frame unit 41, 43 lens frame 42 aperture unit 52 OIS frame 53 base frame 53a adjustment hole 61 Sixth group frame 62 Sixth group adjustment ring 63 Eccentric pin 63a Hole 63b First part 63c Second part 64 Screw 65 Adhesive plate 65a Hole 66 Adhesive 67 Energizing spring

Claims (8)

A lens barrel,
A base frame having a first through hole;
An adhesive plate having a second through hole;
A lens frame disposed inside the base frame and having a lens fixed thereto;
An adhesive fixing portion for fixing the lens frame to the base frame,
The adhesive plate is provided in the vicinity of the first through hole and is held by the base frame in a movable state.
The lens frame is a protrusion protruding in a radial direction with respect to the optical axis of the lens barrel, and has a protrusion that engages with the second through hole and is inserted into the first through hole,
The protrusion is movable in the first through hole so as to change a position of the lens frame with respect to the base frame;
The adhesive fixing portion is a lens barrel that is disposed in the first through hole and fixes the protrusion of the lens frame, the base frame, and the adhesive plate to each other.   An adjustment ring having an arcuate portion sandwiched between the base frame and the lens frame in the optical axis direction, and the thickness of the arcuate portion varies in an angular direction centered on the optical axis. The lens barrel according to Item 1.   The lens barrel according to claim 1, wherein a gap between the protrusion of the lens frame and the second through hole is smaller than a gap between the protrusion of the lens frame and the first through hole.   The lens barrel according to claim 3, wherein the second through hole has a shape and a size equivalent to an outer periphery of the protrusion of the lens frame. The projection of the lens frame includes a first portion that is rotatably provided on the base side, and a second portion that is eccentric from the first portion on the distal end side and rotates integrally with the first portion. And
The lens barrel according to any one of claims 1 to 4, wherein the second part is rotated to rotate the first part and move the lens frame.   The lens barrel according to claim 5, wherein the second through hole has a shape and a size equivalent to an outer periphery of the second portion of the lens frame.   The lens barrel according to claim 1, wherein the adhesive plate is held by the base frame in a movable state along a wall surface of the base frame in which the first through hole is provided.   The lens barrel according to claim 1, wherein the plurality of protrusions and the plurality of first through holes of the lens frame are provided apart in an angular direction with the optical axis as a center.

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