JP6803558B2 - Lens barrel - Google Patents

Description

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

Patent Document 1 discloses a lens barrel having a lens holding member for holding a lens, a cylindrical lens barrel body, and a lens adjusting mechanism for adjusting the position of the lens holding member on the inner peripheral side of the lens 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 from 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-A-2010-191070

The present disclosure provides a lens barrel having a rigid structure for adjusting and fixing the position of the lens frame with respect to the lens barrel.

The lens barrel according to one 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 arranged inside the base frame and fixed to a lens, and a lens. It has an adhesive fixing portion for fixing the frame to the base frame. The adhesive plate is provided in the vicinity of the first through hole and is held in 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 within 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 arranged in the first through hole of the base frame, and fixes the protrusion 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 in which the position of the lens frame with respect to the lens barrel is adjusted and fixed.

FIG. 1A is a perspective view showing the appearance of the lens barrel according to the 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 units according to the embodiment. FIG. 4 is an exploded perspective view of the 4-6 group units according to the embodiment. FIG. 5A is a front view for explaining the adjustment mechanism of the 6-group frame according to the embodiment. FIG. 5B is a side view for explaining the adjustment mechanism of FIG. 5A. FIG. 5C is a cross-sectional view taken along the line AA extending in the radial direction through the center of the group 5 base frame of FIG. 5A. FIG. 5D is a cross-sectional development view along the line BB extending in the circumferential direction of the group 5 base frame of FIG. 5A. FIG. 6 is an explanatory diagram showing the relationship between the group 5 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 come to the following findings regarding the technology described in the "Background Technology" column. In Patent Document 1, since the adhesive fixes 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 fixed 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 lens barrel body is lowered. That is, the strength of the adjusting portion of the lens barrel becomes low. Therefore, the present inventor has found a lens barrel that improves the strength of the adjusting portion as follows.

The lens barrel according to one 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 arranged inside the base frame and fixed to a lens, and a lens frame. Has an adhesive fixing portion for fixing the lens 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, and the lens frame is a protrusion protruding in the radial direction with respect to the optical axis of the lens barrel, and is a second through hole. Has a protrusion that engages with and is inserted into the first through hole. The protrusion is movable within 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 arranged in the first through hole, and fixes the protrusion of the lens frame, the base frame, and the adhesive plate to each other.

In the above configuration, the adhesive fixing portion fixes the protrusion of the lens frame to the base frame via the adhesive plate. Therefore, the force acting on the fixed portion by the adhesive fixing portion is dispersed on the adhesive plate, and the stress acting on the adhesive fixing portion is reduced. Further, the fixing by the adhesive fixing portion 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 adjusting portion in the lens barrel is improved.

The lens barrel further has an adjustment ring having an arc-shaped portion sandwiched between the base frame and the lens frame in the optical axis direction, and the thickness of the arc-shaped portion may change in the angular direction about the optical axis. .. In the above configuration, when the adjusting ring rotates together with the arcuate portion in the above-mentioned angular direction, the distance between the base frame and the lens frame in the optical axis direction changes. This makes it possible to adjust the position of the lens frame in the optical axis direction with respect to the base frame.

The gap between the protrusion of the lens frame and the second through hole may be smaller than the gap between the protrusion of the lens frame and the first through hole. Further, the second through hole may have the same shape and dimensions as the outer circumference of the protrusion 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 protrusion of the lens frame and the second through hole is reduced. Therefore, it is possible to fix with a sufficient amount of adhesive fixing portion.

The protrusion 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 tip side and is provided so as to rotate integrally with the first portion. By rotating the second portion, the first portion may be rotated and the lens frame may be moved. In the above configuration, the protrusion 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 dimensions as the outer circumference 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 protrusion of the lens frame and the second through hole is significantly 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 provided with the first through hole. In the above configuration, it is possible to prevent the adhesive plate from restricting the position change of the protrusion due to the position change of the lens frame.

A plurality of protrusions and a plurality of first through holes of the lens frame may be provided apart from each other in the angular direction about the optical axis. In the above configuration, the lens frames are repositioned at a plurality of positions separated from each other. Therefore, the precise position adjustment of the lens frame becomes possible.

The lens barrel according to another aspect of the present disclosure is sandwiched between the base frame, the lens frame arranged inside the base frame and the lens is fixed, and the base frame and the lens frame in the optical axis direction of the lens barrel. It has an adjustment ring provided with an arcuate portion, and the thickness of the arcuate portion in the optical axis direction changes in the angular direction about the optical axis. In the above configuration, when the adjusting ring rotates together with the arcuate portion in the above-mentioned angular direction, the distance between the base frame and the lens frame in the optical axis direction changes. This makes it possible to adjust the position of the lens frame in the optical axis direction with respect to the base frame.

At least one of the base frame and the lens frame may partially contact the adjustment ring. Further, at least one of the base frame and the lens frame may have a protrusion that contacts the adjustment ring. With the above configuration, at least one of the base frame and the lens frame can come into contact with the adjustment ring even if the adjustment ring is deformed such as warped, bent, or distorted. In addition, the contact through the protrusions, unlike the surface contact, allows the maintenance of reliable contact with the adjusting ring.

The lens barrel may further have an urging spring that urges at least one of the base frame and the lens frame toward the adjustment ring. With the above configuration, the adjustment ring can be maintained in contact with the lens frame, 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, and the urging spring is a frame. The lens frame may be urged toward the protrusion between the portion and the lens frame. In the above configuration, the adjusting ring, the lens frame, and the urging spring can be accommodated in the frame portion, and the lens barrel can be miniaturized.

The adjusting ring may have a plurality of arcuate portions arranged angularly apart about the optical axis. With the above configuration, the lens frame can be moved evenly as a whole by the plurality of arcuate 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 explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art.

It should be noted that 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 by these. 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 the appearance of the lens barrel 100 according to the 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 unit 108 for performing operations such as zooming and focusing. The lens barrel 100 moves the internal lens group by operating the operation unit 108 provided on the lens barrel or by following a command sent by an electric signal from the camera. As a result, the lens barrel 100 adjusts the zoom and focus to the angle of view intended by the user. 1A to 1C show a state in which a tripod mount 90 for fixing the lens barrel 100 to a tripod is attached to the lens barrel 100.

FIG. 2 is an exploded perspective view of the lens barrel 100 according to the embodiment, showing a state in which the tripod mount 90 is attached to the lens barrel 100. The lens barrel 100 includes a 1-group unit 101 having a fixed lens, a 2-group unit 102 with a fixed zoom lens, a 3-group unit 103 with a fixed zoom lens, and an image shake correction device. It includes a 6-group unit 104 and a 7-9 group unit 105 with a built-in focus lens. Further, the lens barrel 100 includes a first fixed frame 106, a second fixed frame 107, and a light-shielding frame unit 111. The above-mentioned 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 circumference of the first fixed frame 106, and advance and retreat in the optical axis direction of the lens barrel 100, whereby the lens barrel 100 Change the focal length of the lens unit.

The 7-9 group unit 105 has a built-in focus motor that moves the focus lens in the optical axis direction, and moves the focus lens by an electric 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 of canceling image blur by moving the image blur correction lens on a plane perpendicular to the optical axis in accordance with an electric signal.

The second fixed frame 107 constitutes the base of the entire lens barrel 100. A 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 of the second fixed frame 107 in the optical axis direction. The mount portion 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.

[Structure of 2.4-6 group units]
The 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 has a 4th group 40, a 5th group 50, a 6th group 60, and a 6th group adjusting ring 62. The fourth group portion 40 includes a lens frame 41 to which a lens is fixed, a lens frame 43 to which a lens is fixed, and an aperture unit 42 for adjusting the amount of light incident on the lens. The 5th group 50 is an OIS (Optical Image Stabilization) magnet unit 51 that is a part of an actuator that drives the image stabilization lens, an OIS frame 52 to which the image stabilization lens is fixed, and the entire 4-6 group unit. Includes a base frame 53 as a base. The 6-group portion 60 includes a 6-group frame 61 (an example of a lens frame) to which a lens is fixed. The 6-group adjustment ring 62 is an adjustment ring for adjusting the position of the lens of the 6-group portion 60 in the optical axis direction.

In the present embodiment, the 6-group frame 61 is configured so that the position can be adjusted. The 6-group frame 61 is, for example, intentionally fixed by shifting from the position of the design center to cancel the influence of an error of each part (for example, manufacturing tolerance), an assembly error (for example, variation), and the like. This makes it possible to improve the optical performance of the lens barrel 100 as a whole.

[Detailed explanation of the position adjustment mechanism of the 3.6 group frame]
In the following, the configuration of the position adjustment of the 6-group frame 61 will be described in detail with reference to FIGS. 5A to 7D.

5A to 5D are explanatory views of the adjustment mechanism of the 6-group frame 61 according to the embodiment. FIG. 5A is a front view for explaining the adjusting mechanism of the 6-group frame 61 according to the embodiment. FIG. 5B is a side view for explaining the adjustment mechanism of FIG. 5A. FIG. 5C is a cross-sectional view taken along the line AA extending in the radial direction through the center of the group 5 base frame 53 of FIG. 5A. FIG. 5D is a developed view of a cross section of the group 5 base frame 53 of FIG. 5A along the line BB extending in the circumferential direction.

In the present embodiment, the relative positions of the 6-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 (eccentricity amount and eccentric direction) on the plane perpendicular to the optical axis of the lens barrel 100.
(Ii) Relative position of the lens barrel 100 in the optical axis direction

Hereinafter, the mechanism for adjusting the positions of these two items will be described step by step.

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

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

FIG. 6 is an explanatory diagram showing the relationship between the group 5 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 53a inside the side wall 531 of the base frame 53. The adhesive plate 65 is formed with a circular hole 65a penetrating the adhesive plate 65. In the vicinity of each adjusting hole 53a, two protrusions 53ba integrally projecting from the inner peripheral surface of the side wall 531 form two opposing slits 53b with 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 sides of each adhesive plate 65 are inserted into two opposing slits 53b and held by the protrusions 53ba. As a result, the adhesive plate 65 held by the protrusion 53ba is located facing the adjusting hole 53a and can move 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 the second through hole.

Further, referring to FIGS. 5B and 5C, three cylindrical eccentric pins 63 are arranged so as to engage with the outer peripheral edge of the ring plate-shaped 6-group frame 61, and the screw 64 with a washer is used. It is fixed to the outer periphery. The three eccentric pins 63 are evenly arranged in the circumferential direction of the outer peripheral edge of the 6-group frame 61, and project in the radial direction of the 6-group frame 61. The positions of the three eccentric pins 63 correspond to the positions of the three adjustment holes 53a of the base frame 53. In order for the 6-group frame 61 to be assembled to the base frame 53, each eccentric pin 63 of the 6-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 6-group frame 61. Here, the eccentric pin 63 fixed to the outer peripheral edge of the 6-group frame 61 by the screw 64 is an example of the 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. 7D shows a side view of the eccentric pin 63. The bottom view of the eccentric pin 63 of FIG. 7A is shown. The eccentric pin 63 has a hole 63a into which the screw 64 is inserted. The center of the hole 63a is arranged at a position deviated 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 located on the base side and a cylindrical second portion 63c located on the distal end side. The first portion 63b is located on the 6-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 displaced in these radial directions. That is, the axial center of the second portion 63c is located eccentrically in the radial direction from the axial center of the first portion 63b. The first portion 63b engages with a cylindrical recess formed on the outer peripheral edge of the 6-group frame 61. The second portion 63c is inserted into the hole 65a of the adhesive plate 65 and the adjusting hole 53a of the base frame 53. The screw 64 passes through the hole 63a formed in the first portion 63b. Therefore, the second portion 63c of the eccentric pin 63 is positioned eccentrically in the radial direction from the screw 64 as well.

Referring to FIGS. 5B and 5C, in the present embodiment, the hole 65a of the adhesive plate 65 is formed in the same shape and dimensions as the second portion 63c of the eccentric pin 63, as will be described later. The adjusting hole 53a of the base frame 53 is formed in a dimension larger than the diameter of the second portion 63c in the longitudinal direction, and is formed in a dimension equivalent to the diameter of the second portion 63c in the lateral 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 adjusting hole 53a.

When the screw 64 is in a state of being loosened by a predetermined amount from the state of being completely tightened, the eccentric pin 63 is loosely fastened to the 6-group frame 61 while being pressed by the spring property of the washer. .. As a result, the eccentric pin 63 can rotate about the screw 64 and the first portion 63b with respect to the 6-group frame 61. 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 eccentricly rotated from these axes, that is, the second portion 63c. Revolve around the axis of. As a result, the 6-group frame 61 with which the first portion 63b is engaged 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 6-group frame 61 and the axis of the base frame 53 changes. The adhesive plate 65 that engages with the second portion 63c does not move. Further, by adjusting the rotation angles of the three eccentric pins 63, the base frame 53 is on the plane perpendicular to the axis of the 6-group frame 61, that is, on the plane perpendicular to the optical axis of the 6-group frame 61. The relative position (eccentricity amount and eccentricity direction) of the 6-group frame 61 with respect to the above 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 6-group frame 61 is urged with respect to the base frame 53 by three urging springs 67 in the optical axis direction. A plurality of protrusions 53c are integrally formed on the side wall 531 of the base frame 53, and the plurality of protrusions 53c project from the inner peripheral surface of the side wall 531 inward in the radial direction in a direction intersecting the optical axis. To do. In this embodiment, three protrusions 53c are provided. The three protrusions 53c are arranged apart from the partition wall 532 of the base frame 53 in the optical axis direction, and are evenly arranged at intervals in the circumferential direction of the side wall 531. Each protrusion 53c is integrally provided with a protrusion 53d protruding in the optical axis direction toward the partition wall 532. A 6-group frame 61 is arranged between the three protrusions 53c and the partition wall 532. Further, the partition wall 532 is integrally formed with three spring shaft portions 532a extending in the direction toward the protrusion 53c. Each urging spring 67 is arranged on the spring shaft portion 532a. In the present embodiment, the urging spring 67 is a coil spring, but the spring is not limited to this, and may be a spring having an arbitrary configuration. The tip of the spring shaft portion 532a loosely engages with the 6-group frame 61 to roughly position the 6-group frame 61.

Further, a ring plate-shaped 6-group adjusting ring 62 is arranged between the three protrusions 53c and the 6-group frame 61. As a result, the 6-group adjustment ring 62 is sandwiched by the protrusion 53c and the 6-group frame 61. The 6-group frame 61 is integrally provided with a plurality of protrusions 61a projecting in the optical axis direction toward the 6-group adjustment ring 62. In the present embodiment, the three protrusions 61a are evenly arranged in the circumferential direction of the 6-group frame 61. The position of each protrusion 61a corresponds to the position of the protrusion 53d of the protrusion 53c of the base frame 53. The protrusions 61a of the 6-group frame 61 and the protrusions 53d of the protrusions 53c are located so as to face each other, for example. The protrusions 61a and 53d are in contact with the 6-group adjustment ring 62 from both sides and sandwich the 6-group adjustment ring 62. As a result, it is possible to prevent the 6-group frame 61 and the protrusion 53c from coming into surface contact with the 6-group adjusting ring 62. Therefore, even if the 6-group frame 61 or the 6-group adjustment ring 62 is warped, bent, distorted, or otherwise deformed, the 6-group frame 61 and the protrusion 53c come into contact with the 6-group adjustment ring 62 via the protrusions 61a and 53d. can do. Further, the urging of the urging spring 67 maintains the contact state. Further, the 6-group frame 61, the 6-group adjustment ring 62 and the urging spring 67 can be housed in the side wall 531 of the base frame 53 by the configuration in which the protrusion 53c and the 6-group frame 61 sandwich the 6-group adjustment ring 62.

As described above, the 6-group frame 61 is configured to be pressed against the base frame 53 with the 6-group adjustment ring 62 sandwiched between them.

The surface of the 6-group adjusting ring 62 in contact with the protrusion 61a of the 6-group frame 61 is a flat surface, specifically, a flat surface. On the other hand, the surface of the base frame 53 in the 6-group adjusting ring 62 that contacts the protrusion 53d forms an inclined surface 62a that is inclined with respect to the surface that contacts the protrusion 61a. The inclined surface 62a extends in an arc shape in the angular direction about the optical axis, specifically, along the circumferential direction of the 6-group adjustment ring 62. The portion of the 6-group adjustment ring 62 on which the inclined surface 62a is formed forms an arc-shaped portion of the 6-group adjustment ring 62. The inclined surface 62a is inclined so that the thickness of the 6-group adjustment ring 62 in the optical axis direction gradually changes in the circumferential direction of the 6-group adjustment ring 62, for example, the thickness of the 6-group adjustment ring 62 changes gently and continuously at a constant rate. doing. The three inclined surfaces 62a are evenly arranged in the circumferential direction of the six-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 62a in the circumferential direction of the 6-group adjusting ring 62 are the same.

Here, when the 6-group adjustment ring 62 is rotated around the optical axis, the thickness of the portion sandwiched between the protrusion 61a of the 6-group frame 61 and the protrusion 53d of the protrusion 53c of the base frame 53 changes. , The distance between the 6-group frame 61 and the protrusion 53c changes. Therefore, the position of the 6-group frame 61 in the optical axis direction changes with respect to the protrusion 53c. By adjusting the rotation angle of the 6-group adjustment ring 62, the position of the 6-group frame 61 in the optical axis direction can be adjusted. Since the inclined surfaces 62a and the protrusions 61a and 53d are evenly arranged, the entire 6-group frame 61 moves evenly in substantially parallel in the optical axis direction as the 6-group adjustment ring 62 rotates. Can be done. Further, the adjustment portion of the 6-group adjustment ring 62 on which the inclined surface 62a is formed is sandwiched between the protrusion 61a of the 6-group frame 61 and the protrusion 53d of the base frame 53, and high strength is not required. The thickness of the adjusting ring 62 can be reduced.

The method of adjusting the position of the 6-group frame 61 in the optical axis direction by using the 6-group adjusting 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, the adjustment accuracy is almost affected even if the 6-group adjustment ring is deformed such as warped, bent, or distorted. Absent.
-Since the shape of the 6-group adjustment ring 62 is simple, it is easy to mass-produce the 6-group adjustment ring 62 by a manufacturing method such as resin molding.
-Since the configuration for position adjustment is a configuration that only uses a thin 6-group adjustment ring 62 and an urging spring 67, the required space is reduced.

As described above, according to the configuration of the present embodiment, it is possible to adjust the position of the 6-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, it is possible to adjust the relative position of the 6-group frame 61 with respect to the base frame 53 on a plane perpendicular to the optical axis by rotating the eccentric pin 63. By adjusting the rotation angle of the 6-group adjustment ring 62, adjustment in the optical axis direction is possible. Each adjustment can be made independently. In other words, regarding the adjustment of the relative position of the 6-group frame 61, the position in the optical axis direction does not change when the eccentricity amount and the eccentric direction are adjusted. Similarly, regarding the adjustment of the relative position of the 6-group frame 61, the eccentricity amount and the eccentric direction do not change when the position in the optical axis direction is adjusted.

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

The hole 65a of the adhesive plate 65 is formed with a diameter slightly larger than the outer diameter of the eccentric pin 63. That is, the diameter of the hole 65a of the adhesive plate 65 is equivalent to the outer diameter of the eccentric pin 63. Each eccentric pin 63 is inserted into each adjusting hole 53a of the base frame 53 in a state of being inserted into and engaged with the hole 65a of each adhesive plate 65. At this time, since each adjusting hole 53a is an elongated hole, each eccentric pin 63 can move together with the adhesive plate 65 in the optical axis direction. As shown in FIG. 5C, after rotating the eccentric pin 63 and the 6-group adjustment ring 62 to adjust the position of the 6-group frame 61 with respect to the base frame 53, the adjustment hole 53a of the base frame 53, the eccentric pin 63, and the eccentric pin 63 The region surrounded by the adhesive plate 65 is filled with the ultraviolet curable adhesive 66. The adhesive 66 fixes the 6-group frame 61 to the base frame 53 by being cured by receiving ultraviolet rays. Specifically, the cured adhesive 66 realizes the above fixing by fixing the base frame 53, the eccentric pin 63, and the adhesive plate 65 to each other. The adhesive used is not limited to the ultraviolet curable adhesive, and may be any adhesive. Here, the cured adhesive 66 is an example of the 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.

In the absence of the adhesive plate 65, the adhesive is filled in a large gap formed between the adjusting hole 53a 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, it is necessary to use a highly viscous adhesive to bridge the gaps in the adhesive. 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. Then, there is a risk that the uncured adhesive will flow out later and adhere to the surrounding movable parts.

On the other hand, when the adhesive plate 65 is provided, the gap formed between the adjusting hole 53a of the base frame 53 and the eccentric pin 63 is covered by the adhesive plate 65 on one of both sides thereof. Therefore, even an adhesive having a relatively low viscosity can be applied into the gap, and the workability of applying the adhesive is improved. Further, since there is no concern that the adhesive sticks out to the inner peripheral portion of the side wall 531 of the base frame 53, there is no problem caused by the sticking out of the adhesive.

Next, the second point is strength.

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

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 form a fixed portion. Therefore, the adhesive can have a wide adhesive area between the adhesive plate 65 and the base frame 53 and between the adhesive plate 65 and the eccentric pin 63. Further, 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 where only the adhesive is used. Further, since there is no concern that the adhesive sticks out 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. Therefore, the 6-group frame 61 can be firmly fixed to the base frame 53, and the strength of the fixed portion is improved. In this way, the strength of the adjusting 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 stable and the fixing strength can be improved.

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

For example, a through hole different from the adjusting hole 53a is provided in the base frame 53, a protrusion different from the eccentric pin 63 is provided in a portion of the 6-group frame 61 facing the through hole, and the protrusion is adhesively fixed to the through hole. You may.

Further, although the adhesive plate 65 is not described in detail, the adhesive plate 65 can be produced by punching a thin metal plate by press working, or 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-shaped adhesive plate is shown, but an adhesive plate having other shapes has the same effect.

(Other embodiments)
As described above, an embodiment has been described as an example of the technique in the present disclosure. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. It is also possible to combine the components described in the above embodiment and the other embodiments below to form a new embodiment. Therefore, other embodiments will be illustrated below.

The lens barrel 100 according to the embodiment is provided with a configuration for adjusting the positions of the 6-group frame 61 in the optical axis direction and the direction perpendicular to the optical axis. However, this configuration is provided in the lens barrel 100. It may be applied to any part where position adjustment is required.

In the lens barrel 100 according to the embodiment, the urging spring 67 urges the 6-group frame 61 to the 6-group adjustment ring 62 and the base frame 53, but is not limited thereto. The urging spring may be configured to urge the base frame 53 to the 6-group adjusting ring 62 and the 6-group frame 61, and to urge the 6-group frame 61 and the base frame 53 to the 6-group adjusting ring 62. It may be configured in.

As described above, the embodiments and other embodiments are provided by the accompanying drawings and detailed description. These are provided to those skilled in the art to illustrate the subject matter described in the claims by reference to a particular embodiment. Therefore, the components described in the attached drawings and the detailed description may include not only the components essential for solving the problem but also other components. Therefore, just because those non-essential components are described in the accompanying drawings or detailed description should not be immediately recognized as essential. In addition, various changes, replacements, additions, omissions, etc. can be made to the above-described embodiments within the scope of claims or the equivalent thereof.

The present disclosure is applicable to a lens barrel used in a digital still camera or the like.

100 Lens barrel 101 1st group unit 102 2nd group unit 103 3rd group unit 104 4-6th group unit 105 7-9th group unit 106 Fixed frame unit 41, 43 Lens frame 42 Aperture unit 52 OIS frame 53 Base frame 53a Adjustment hole 61 6-group frame 62 6-group adjustment ring 63 Eccentric pin 63a Hole 63b 1st part 63c 2nd part 64 Screw 65 Adhesive plate 65a Hole 66 Adhesive 67 Bounce spring

Claims (9)

It ’s a lens barrel,
A base frame with a first through hole and
An adhesive plate with a second through hole and
A lens frame that is arranged inside the base frame and has a fixed lens,
It has 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 in the inner peripheral surface of the base frame orthogonal to the first through hole .
The lens frame is a protrusion that protrudes in the 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 within 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 arranged in the first through hole, and is a lens barrel for fixing the protrusion of the lens frame, the base frame, and the adhesive plate to each other. The lens barrel according to claim 1, wherein the adhesive plate is inserted into a slit portion formed in an inner peripheral portion of the base frame. A claim that further has an adjustment ring having an arc-shaped portion sandwiched between the base frame and the lens frame in the optical axis direction, and the thickness of the arc-shaped portion changes in an angular direction about the optical axis. Item 2. The lens barrel according to item 1. The lens mirror according to any one of claims 1 to 3 , wherein the gap between the protrusion of the lens frame and the second through hole is smaller than the gap between the protrusion of the lens frame and the first through hole. Cylinder. The lens barrel according to claim 4 , wherein the second through hole has a shape and dimensions equivalent to the outer circumference of the protrusion of the lens frame. The protrusions of the lens frame are provided so as to have a first portion rotatably provided on the base side and a second portion eccentric from the first portion on the tip side and rotating integrally with the first portion. And have
The lens barrel according to any one of claims 1 to 5 , wherein the second portion is rotated to rotate the first portion and move the lens frame. The lens barrel according to claim 6 , wherein the second through hole has the same shape and dimensions as the outer circumference of the second portion of the lens frame. The lens barrel according to any one of claims 1 to 7 , wherein the adhesive plate is held in the base frame in a movable state along the wall surface of the base frame provided with the first through hole. The lens barrel according to any one of claims 1 to 8 , wherein the plurality of protrusions and the plurality of first through holes of the lens frame are provided apart from each other in an angular direction about the optical axis.

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