JP2009282128A - Lens barrel connecting mechanism, lens device, and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent backlash of a ringlike member in a thrust direction (an optical axis direction) relative to a plurality of lens barrels without increasing the number of components and deteriorating appearance, and to improve the operability of the ringlike member. <P>SOLUTION: The lens barrel connecting mechanism includes: a rotating body 102 which covers the boundary between an appearance holding member 101 and a holding member 103, which are disposed parallel to each other in the direction of the optical axis, from the peripheral sides of the members 101 and 103, and is freely rotated around the optical axis relative to the appearance holding member 101 and the holding member 103; an annular member 105 which has an annular shape around the optical axis, is disposed on the inner circumferential side of the rotating body 102, and is rotatable between the appearance holding member 101 and the holding member 103 along with the rotation of the rotating body 102; and a plurality of projections 304 and 401 provided on the annular member 105 so as to project on the eyepiece side and objective side of the annular member 105 so as to abut on the appearance holding member 101 and the holding member 103. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens barrel coupling mechanism that couples a pair of lens barrels arranged in parallel in the optical axis direction, a lens device that includes the lens barrel coupling mechanism, and an imaging device that includes the lens device.

  Conventionally, an annular member such as a focus ring provided between a pair of lens barrels arranged in parallel in the optical axis direction is provided, and by moving the lens in the optical axis direction as the focus ring rotates, There has been a lens apparatus that adjusts the focal position (focal length) of the lens. In such a lens apparatus, a gap may be formed between the parts due to manufacturing accuracy such as flatness and parallelism of the parts, and the focus ring or the like may be rattled due to the gap.

  As a countermeasure for this, conventionally, by using a biasing member such as a spring component, by biasing the focus ring from one side (eyepiece side or objective side) in the optical axis direction to the other side (objective side or eyepiece side), There has been a technique for preventing the shaking of the position of the focus ring in the optical axis direction (thrust direction) (see, for example, Patent Documents 1, 2, and 3 below).

JP 2007-240955 A JP 2000-180689 A JP 2001-91810 A

  However, in the conventional technique described above, a biasing member is used to bias a ring-shaped member such as a focus ring from one side (eyepiece side or objective side) in the optical axis direction to the other side (objective side or eyepiece side). Therefore, there is a problem that the position of the focus ring in the thrust direction varies from lens device to lens device due to variations in the biasing force of the biasing member due to differences in the shape and material of the spring member.

  As a result, the clearance between the lens barrel and the focus ring in the thrust direction differs depending on the lens device, and there is a problem that, for example, the appearance design is inconsistent with the lens device listed in the catalog. Further, in the conventional technique described above, there is a problem that the number of parts increases because the biasing member for preventing the shaking of the position of the focus ring in the thrust direction is used.

  Further, in the conventional technique described above, the lens barrel arranged on the side where the biasing member is provided with respect to the focus ring is in point contact or line contact with the biasing member, and the side where the biasing member is not provided. Since the lens barrel and the focus ring are in surface contact with each other, the area that generates friction when the corresponding parts slide with the rotation of the focus ring is greatly different between the eyepiece side and the object side of the focus ring. There is a problem that this difference in area causes an uncomfortable operation feeling (hereinafter referred to as “rough feeling”) to the operator who operates the focus ring.

  The present invention eliminates the problems caused by the prior art described above, so that the thrust direction (optical axis direction) of the ring-shaped member with respect to the pair of lens barrels does not increase the number of parts and does not impair the appearance. An object of the present invention is to provide a lens barrel coupling mechanism, a lens device, and an imaging device that can prevent rattling and can improve the operability of the ring-shaped member.

  In order to solve the above-described problems and achieve the object, a lens barrel coupling mechanism according to the present invention includes a first tube portion having a first end surface orthogonal to the optical axis direction, and the first tube portion in the optical axis direction. A second tube portion having a second end surface provided on the eyepiece side with respect to the end surface; and an outer peripheral side of the fixed tube relative to the fixed tube with respect to the optical axis. A ring-shaped member that is rotatable, and provided on the ring-shaped member, projecting toward the eyepiece side and the object side of the ring-shaped member so as to be in pressure contact with the first end surface and the second end surface, respectively. And a plurality of elastic protrusions. According to this invention, it is possible to fix the position of the ring-shaped member in the thrust direction (optical axis direction) by applying a biasing force to the ring-shaped member by both the first cylindrical portion and the second cylindrical portion.

  Further, the lens barrel coupling mechanism according to the present invention is the above-described invention, wherein the ring-shaped member has an annular shape centering on the optical axis on the inner peripheral side of the ring-shaped member, and the first end surface A rotating portion that is rotatable with the rotation of the ring-shaped member between the second end surface and the plurality of elastic protrusions are disposed on an eyepiece side and an object side of the rotating portion, respectively; It is characterized by being. According to this invention, by applying an urging force to the rotating portion by both the first cylindrical portion and the second cylindrical portion on the inner peripheral side of the ring-shaped member, the position of the ring-shaped member in the thrust direction (optical axis direction) is determined. Can be fixed.

  The lens barrel coupling mechanism according to the present invention is the lens barrel coupling mechanism according to the present invention, wherein the plurality of elastic protrusions are equidistantly spaced on a concentric circle centered on the optical axis on the eyepiece side and the object side of the rotating member. It is characterized by being arranged in. According to the present invention, the urging force applied to the rotating member by both the pair of lens barrels can be made uniform over the same circumference around the optical axis.

  In the above-described invention, the lens barrel coupling mechanism according to the present invention is characterized in that the same number of the plurality of elastic protrusions are provided on the eyepiece side and the object side of the rotating member. According to the present invention, the contact amount of the protrusion with respect to each of the pair of lens barrels is made equal on the eyepiece side and the objective side of the rotating member, and the biasing force applied to the rotating member by the pair of lens barrels is set on the eyepiece side of the rotating member. It can be made equal on the object side.

  Further, in the above-described invention, the plurality of elastic protrusions alternately protrude on the eyepiece side and the object side of the rotating member on a concentric circle with the optical axis as the center. It is arranged so that it may be arranged. According to this invention, the urging force applied to the rotating member by both of the pair of lens barrels can be made uniform between the eyepiece side and the objective side of the rotating member.

  Further, in the above-described invention, the lens barrel coupling mechanism according to the present invention is characterized in that the plurality of elastic protrusions have a curved surface shape whose tips protrude toward the pair of lens barrels. According to this invention, a plurality of protrusions can be reliably brought into point contact with a pair of lens barrels.

  The lens device according to the present invention includes a lens that is movably provided in the optical axis direction, the lens barrel coupling mechanism, and the ring-shaped member provided in the lens barrel coupling mechanism. And a lens moving mechanism for moving in the optical axis direction. According to this invention, since the position of the ring-shaped member for adjusting the position of the lens in the optical axis direction is fixed in the lens barrel coupling mechanism, it is possible to prevent the appearance variation from occurring for each lens device. be able to.

  An image pickup apparatus according to the present invention includes an image pickup element that generates an electrical signal obtained by photoelectrically converting incident light, the above-described lens apparatus, and an optical member that causes light incident through the lens apparatus to enter the image pickup element. , Provided. According to the present invention, by using a lens device with a uniform appearance, it is possible to prevent variations in appearance from occurring for each imaging device and to achieve a uniform appearance in the imaging device.

  According to the lens barrel coupling mechanism, the lens device, and the imaging device according to the present invention, the thrust member (optical axis) of the ring-shaped member is formed by holding the rotating member provided integrally with the ring-shaped member by the pair of lens barrels. (Direction) can be fixed. There is an effect. As a result, it is possible to prevent rattling of the ring-shaped member in the thrust direction (optical axis direction) with respect to the plurality of lens barrels without increasing the number of parts and without impairing the appearance.

  Furthermore, according to the lens barrel coupling mechanism, the lens device, and the imaging device according to the present invention, it is possible to reduce the feeling of roughness when the ring-shaped member rotates. Thereby, the operability of the ring-shaped member can be improved.

  Exemplary embodiments of a lens barrel coupling mechanism, a lens apparatus, and an imaging apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Schematic configuration of the lens barrel coupling mechanism)
First, a schematic configuration of a lens barrel coupling mechanism according to an embodiment of the present invention will be described. The lens barrel coupling mechanism according to the embodiment of the present invention constitutes a part of a lens apparatus capable of adjusting the focal position. 1 and 2 are explanatory views showing a schematic configuration of a lens barrel coupling mechanism according to an embodiment of the present invention. FIG. 1 shows a cross section of the lens barrel coupling mechanism according to the embodiment of the present invention cut along a plane passing through the optical axis. FIG. 2 shows a state in which the lens barrel coupling mechanism according to the embodiment of the present invention is disassembled and viewed from an oblique direction.

  1 and 2, a lens barrel coupling mechanism 100 according to an embodiment of the present invention includes an appearance holding member 101, a rotating body 102, a holding member 103, and an appearance member 104. The members 101 to 104 are arranged in the order of the appearance holding member 101, the rotating body 102, the holding member 103, and the appearance member 104 from the object side toward the eyepiece side. In this embodiment, the first cylindrical portion is realized by the appearance holding member 101, and the second cylindrical portion is realized by the holding member 103. In this embodiment, a fixed cylinder is realized by the appearance holding member 101 and the holding member 103. The appearance holding member 101 and the holding member 103 may be configured as one member or may be configured as separate members.

  The appearance holding member 101 has a substantially cylindrical shape with the optical axis as an axis. The external dimensions of the appearance holding member 101 are switched in two stages along the optical axis direction, and the outer diameter dimension on the eyepiece side is smaller than the outer diameter dimension on the objective side. The rotating body 102 has an annular shape centered on the optical axis. The inner diameter dimension of the rotating body 102 is substantially the same as the outer diameter dimension of the external appearance holding member 101 on the eyepiece side. The rotating body 102 is in sliding contact with the outer peripheral surface of the appearance holding member 101 on the inner peripheral surface.

  The rotating body 102 includes an annular member 105 that protrudes from the inner peripheral surface of the rotating body 102 toward the optical axis. The annular member 105 protrudes from the inner peripheral surface of the rotating body 102 toward the optical axis along the radial direction of a circle centered on the optical axis, and has an annular shape centered on the optical axis. Details of the annular member 105 will be described later. In this embodiment, a ring-shaped member is realized by the rotating body 102, and a rotating portion is realized by the annular member 105.

  The holding member 103 has a cylindrical shape centered on the optical axis, and includes a flange 106 provided with a flange 106 at an end on the objective side. The holding member 103 is positioned relative to the rotating body 102 by engaging a flange 106 with an annular member 105 provided on the rotating body 102. Specifically, the holding member 103 engages the flange 106 with the annular member 105 by bringing the object-side surface of the flange 106 into contact with the eyepiece-side surface of the annular member 105 provided on the rotating body 102. I am letting.

  In this embodiment, the first end face is realized by the end face on the eyepiece side of the appearance holding member 101, and the second end face is realized by the end face on the objective side of the holding member 103. Specifically, the first end surface is realized by the surface that is in pressure contact with the annular member 105 among the end surfaces on the eyepiece side of the appearance holding member 101. More specifically, the second end surface is realized by the surface in pressure contact with the annular member 105 among the end surfaces on the objective side of the holding member 103.

  The appearance member 104 has a substantially cylindrical shape centered on the optical axis, and is provided on the outer peripheral side of the appearance member 104. The end of the external member 104 on the objective side is fitted to the end of the rotating body 102 on the eyepiece side. Specifically, the end portion on the objective side of the appearance member 104 is fitted to the end portion on the eyepiece side of the rotating body 102 so as to cover the annular member 105 from the outer peripheral side. The appearance member 104 is connected to the eyepiece side end of the holding member 103 at the eyepiece side end. The appearance member 104 functions to fix the position of the holding member 103 together with the annular member 105.

  Next, the annular member 105 will be described. 3 and 4 are explanatory views showing the annular member 105. 3 shows a perspective state of the rotating body 102 from the object side, and FIG. 4 shows a perspective state of the rotating body 102 from the eyepiece side. 3 and 4, the annular member 105 is provided on the inner peripheral surface of the rotating body 102. The annular member 105 is formed integrally with the rotating body 102 by die cutting using a plastic material or the like.

  The annular member 105 includes a plurality of ribs 301 projecting from the inner peripheral surface of the rotating body 102 toward the optical axis and a plurality of pedestals provided at positions between the ribs 301 in the circumferential direction around the optical axis. The part 302 forms an annular shape. A gap 303 is provided between each pedestal portion 302 and the inner peripheral surface of the rotating body 102, and the pedestal portion 302 is suspended by a rib 301.

  Each pedestal portion 302 has either a protrusion 304 protruding from the object-side surface of the pedestal portion 302 toward the object side, or a protrusion 401 protruding from the eyepiece-side surface of the pedestal portion 302 toward the eyepiece side. Is provided. Each pedestal portion 302 is provided with either one of the protrusion 304 or the protrusion 401. In this embodiment, an elastic protrusion is realized by the protrusion 304 and the protrusion 401.

  In each pedestal portion 302, the protrusion 304 or the protrusion 401 is provided in a recess (see reference numeral 501 in FIG. 5) that is recessed from the surface formed by the rib 301 in the optical axis direction. In each pedestal portion 302, the protrusion 304 or the protrusion 401 can be secured in a large amount by leaving the protrusion 304 or the protrusion 401, and being recessed from the rib 301. The protrusion 304 and the protrusion 401 are provided so that the tip protrudes from the end face of the rib 301 in the state shown in FIGS. 3 and 4.

  Further, in each pedestal portion 302, the surface opposite to the surface on which the protrusion 304 or the protrusion 401 is provided is a curved surface (in FIG. 5) recessed inward from the surface formed by the rib 301 in the optical axis direction. Reference numeral 502). The curved surface is curved so that the position overlapping the protrusion 304 or the protrusion 401 in the optical axis direction is most recessed from the end surface position of the rib 301.

  The protrusion 304 protrudes from the annular member 105 so as to abut on the eyepiece side end of the appearance holding member 101. The protrusion 401 protrudes from the annular member 105 so as to contact the flange 106 of the holding member 103 from the object side. The protrusions 304 are arranged at equal intervals on a concentric circle centered on the optical axis. The protrusions 401 are arranged at equal intervals on a concentric circle with the optical axis as the center. The number of protrusions 304 and the number of protrusions 401 are the same.

  The protrusions 304 and the protrusions 401 are arranged so as to protrude alternately on the eyepiece side and the object side of the annular member 105 on a concentric circle centered on the optical axis. That is, the protrusion 304 and the protrusion 401 are provided so that the protrusion 401 is positioned on both sides of the protrusion 304 and the protrusion 304 is positioned on both sides of the protrusion 401 on a concentric circle centered on the optical axis.

  The tip of the protrusion 304 has a curved shape that protrudes toward the eyepiece side end of the appearance holding member 101. The tip of the protrusion 401 has a curved shape protruding toward the flange 106 of the holding member 103. Since the tips of the protrusion 304 and the protrusion 401 are curved, the protrusion 304 makes point contact with the appearance holding member 101 and the protrusion 401 makes contact with the holding member 103, respectively.

  The rotating body 102 and the annular member 105 may be integrally molded, or may be configured by combining the rotating body 102 and the annular member 105 that are separately molded. . Further, the protrusion 304 and the protrusion 401 may be formed integrally with the annular member 105, or the protrusion 304 and the protrusion 401 that are individually molded may be assembled to the annular member 105.

  Next, functions of the protrusion 304 and the protrusion 401 will be described. 5, 6 and 7 are explanatory views showing the protrusions 304 and 401 and the periphery thereof. In FIG. 5, the annular member 105 and its periphery in the barrel coupling mechanism 100 are shown in a plan view. FIG. 6 shows a cross section of the lens barrel coupling mechanism 100 cut along a plane passing through the tip of the protrusion 304 and the optical axis, and shows the relationship between the appearance holding member 101 and the protrusion 304. FIG. 7 shows a cross section of the lens barrel coupling mechanism 100 cut along a plane passing through the tip of the protrusion 401 and the optical axis, and shows the relationship between the appearance holding member 101 and the protrusion 401.

  5 and 6, as the lens barrel coupling mechanism 100, the projection 304 in a state where the appearance holding member 101, the rotating body 102, and the holding member 103 are connected is in contact with the eyepiece side end surface of the appearance holding member 101. . The protrusion 304 in a state where the appearance holding member 101, the rotating body 102, and the holding member 103 are connected comes into contact with the end face on the eyepiece side of the appearance holding member 101, so that the tip is at the same position as the end face of the rib 301. It is displaced. The protrusion 304 is displaced with the deformation of the pedestal portion 302. Due to the deformation of the pedestal 302 in accordance with the displacement of the protrusion 304, a biasing force that biases the rotating body 102 in the eyepiece direction acts on the annular member 105.

  5 and FIG. 7, as the lens barrel coupling mechanism 100, the projection 401 in a state where the appearance holding member 101, the rotating body 102, and the holding member 103 are connected is in contact with the objective-side end surface of the holding member 103. The projection 401 in a state where the appearance holding member 101, the rotating body 102, and the holding member 103 are connected is displaced to a position where the tip is the same position as the end surface of the rib 301 by contacting the end surface on the objective side of the holding member 103. is doing. Similar to the projection 304, the projection 401 is displaced with the deformation of the pedestal portion 302. Due to the deformation of the pedestal portion 302 accompanying the displacement of the protrusion 401, a biasing force that biases the rotating body 102 in the objective direction acts on the annular member 105.

  Note that the protrusion 304 and the protrusion 401 are not limited to those directly in contact with the appearance holding member 101 or the holding member 103, but are pressed against the appearance holding member 101 or another member fixed to the holding member 103 to the annular member 105. A biasing force in the thrust direction (optical axis direction) may be applied. Although not shown, a rotating body 102 is provided between the appearance holding member 101 and the appearance holding member 104, and the object holding side and the eyepiece side of the rotating body 102 are directed toward the appearance holding member 101 and the appearance holding member 104, respectively. An elastic protrusion that protrudes along a direction parallel to the optical axis may be provided, and the elastic protrusion may be brought into pressure contact with the appearance holding member 101 and the appearance holding member 104.

  As described above, as the lens barrel coupling mechanism 100, the rotating body 102 is biased in the eyepiece direction and the objective direction with respect to the annular member 105 in a state where the appearance holding member 101, the rotating body 102, and the holding member 103 are connected. The urging force to act acts. Thereby, the position of the rotating body 102 can be fixed to a position where the urging forces urging in the eyepiece direction and the objective direction are balanced without being shifted.

  The rotating body 102 and the external appearance holding member 101 and the rotating body 102 and the holding member 103 are in point contact with each other via the protrusions 304 and 401 to transmit the urging force. Since the number of the protrusions 304 and the number of the protrusions 401 are the same, the areas of the action points for applying a biasing force in the eyepiece direction or the objective direction to the annular member 105 are equal. That is, it is possible to equalize the areas that generate friction when the rotating body 102 and the appearance holding member 101 and the rotating body 102 and the holding member 103 slide with the rotation of the rotating body 102. Accordingly, it is possible to reduce the feeling of roughness given to the operator who rotates the rotating body 102.

  The above-described lens barrel coupling mechanism 100 can be applied to a lens device. Specific examples of the lens device to which the lens barrel coupling mechanism 100 is applied include a lens device that adjusts the position of the focus lens in the optical axis direction by, for example, rotating a focus ring. In this case, the focus ring is realized by the rotating body 102 in the lens barrel coupling mechanism 100, and the lens movable in the optical axis direction can be realized by the focus lens. Since such a lens apparatus is a known technique, a description of a specific configuration is omitted.

  Further, such a lens device may be applied to an imaging device. In the imaging apparatus in this case, imaging can be performed by introducing external light that has passed through the lens apparatus into an imaging element realized by a CCD, a CMOS, or the like. Since such an imaging apparatus can be easily realized by using various known techniques, description thereof is omitted.

  As described above, according to the embodiment of the present invention, the appearance holding member 101 as an example of the first cylindrical portion having the first end surface orthogonal to the optical axis direction, and the first end surface in the optical axis direction And a holding member 103 as an example of a second tube portion having a second end surface provided on the eyepiece side, and on the outer peripheral side of the fixed tube, the rotation relative to the fixed tube about the optical axis. A plurality of elastic members provided on the rotating body 102 as an example of a movable ring-shaped member and projecting toward the eyepiece side and the objective side of the rotating body 102 so as to be in pressure contact with the first end surface and the second end surface. Therefore, the position of the rotating body 102 in the thrust direction (optical axis direction) can be obtained by applying an urging force to the rotating body 102 by both the external appearance holding member 101 and the holding member 103. It can be fixed.

  Specifically, by applying an urging force to the annular member 105 integrally provided with the rotating body 102 by both the appearance holding member 101 and the holding member 103, the position of the rotating body 102 in the thrust direction (optical axis direction) is changed. Can be fixed. As a result, rattling in the thrust direction (optical axis direction) of the annular member 105 between the plurality of lens barrels can be prevented without increasing the number of parts and without impairing the appearance.

  Further, according to the embodiment of the present invention, the rotating body 102 has an annular shape centering on the optical axis on the inner peripheral side of the rotating body 102, and the end face on the eyepiece side of the appearance holding member 101 and the holding member 103. An annular member 105 as an example of a rotating part that can be rotated with the rotation of the rotating body 102 between the end surface on the object side of the object member. Since the urging force is applied to the annular member 105 by both the external appearance holding member 101 and the holding member 103 on the inner peripheral side of the rotating body 102, the thrust direction (optical axis direction) ) Can be fixed. Further, by fixing the position of the annular member 105 on the inner peripheral side of the rotating body 102, the thrust direction (optical axis direction) of the annular member 105 between the plurality of lens barrels is not impaired without deteriorating the appearance. Can prevent sticking.

  Further, according to the embodiment of the present invention, the plurality of protrusions 304 and 401 are arranged at equal intervals on a concentric circle centered on the optical axis on the eyepiece side and the objective side of the annular member 105. Therefore, the urging force applied to the annular member 105 by both the external appearance holding member 101 and the holding member 103 can be made uniform over the same circumference around the optical axis.

  Accordingly, the annular member 105 is prevented from being inclined with respect to each of the appearance holding member 101 and the holding member 103, and the clearance with respect to the appearance holding member 101 and the holding member 103 is uniform over the same circumference around the optical axis. Can be.

  Further, according to the embodiment of the present invention, since the same number of the plurality of protrusions 304 and 401 are provided on the eyepiece side and the object side of the annular member 105, respectively, the appearance holding member 101 and The contact amounts of the projections 304 and 401 with respect to each of the holding members 103 are made equal on the eyepiece side and the object side of the annular member 105, and the urging force applied to the annular member 105 by the appearance holding member 101 and the holding member 103 is applied to the annular member 105. It can be made equal on the eyepiece side and the object side. As a result, the feeling of roughness when the annular member 105 is rotated can be reduced.

  Further, according to the embodiment of the present invention, the plurality of protrusions 304 and 401 are arranged so as to protrude alternately on the eyepiece side and the object side of the annular member 105 on a concentric circle centered on the optical axis. Therefore, the urging force applied to the annular member 105 by both the external appearance holding member 101 and the holding member 103 can be made uniform on the eyepiece side and the objective side of the annular member 105. As a result, the feeling of roughness when the annular member 105 rotates can be further reduced.

  In addition, according to the embodiment of the present invention, the plurality of protrusions 304 and 401 have a curved surface shape whose front ends protrude toward the appearance holding member 101 and the holding member 103 side. The plurality of protrusions 304 and B can be reliably brought into point contact with the member 101 and the holding member 103. As a result, the feeling of roughness when the annular member 105 is rotated can be reduced.

  The lens device according to the present invention is accompanied by the rotation of the lens (focus lens) provided so as to be movable in the optical axis direction, the lens barrel coupling mechanism 100, and the focus ring provided in the lens barrel coupling mechanism 100. And a lens moving mechanism for moving the lens in the optical axis direction. Therefore, the position of the focus ring for adjusting the position of the lens in the optical axis direction is fixed in the lens barrel coupling mechanism 100. Therefore, it is possible to prevent the appearance variation from occurring for each lens device. Accordingly, it is possible to provide a lens device that is excellent in appearance by unifying the appearance.

  An image pickup apparatus according to the present invention includes an image pickup element that generates an electrical signal obtained by photoelectrically converting incident light, the above-described lens apparatus, and an optical member that causes light incident through the lens apparatus to enter the image pickup element. By using a lens device that has a uniform appearance, it is possible to prevent the appearance from being varied for each image pickup device and to make the appearance uniform in the image pickup device. As a result, it is possible to provide an imaging device with excellent aesthetics by unifying the appearance.

  As described above, according to the lens barrel coupling mechanism, the lens device, and the imaging device according to the present invention, the ring-shaped member is formed by sandwiching the rotating member integrally provided on the ring-shaped member with the pair of lens barrels. The position in the thrust direction (optical axis direction) can be fixed. As a result, it is possible to prevent rattling of the ring-shaped member in the thrust direction (optical axis direction) with respect to the pair of lens barrels without increasing the number of parts and without impairing the appearance.

  Furthermore, according to the lens barrel coupling mechanism, the lens device, and the imaging device according to the present invention, it is possible to reduce the feeling of roughness when the ring-shaped member rotates. Thereby, it is possible to improve the operability of a ring-shaped member such as a focus ring that receives a manual operation by an operator.

  As described above, the lens barrel coupling mechanism, the lens device, and the imaging device according to the present invention include the lens barrel coupling mechanism that couples a pair of lens barrels arranged in parallel in the optical axis direction, and the lens barrel coupling mechanism. The present invention is useful for a lens device and an imaging device including the lens device, and in particular, includes a stator and a rotor having an annular shape centering on an optical axis including a rotating member such as a focus ring that is manually operated. It is suitable for a lens barrel coupling mechanism, a lens device including the lens barrel coupling mechanism, and an imaging device including the lens device.

It is explanatory drawing (the 1) which shows schematic structure of the lens-barrel coupling mechanism of embodiment concerning this invention. It is explanatory drawing (the 2) which shows schematic structure of the lens-barrel coupling mechanism of embodiment concerning this invention. It is explanatory drawing (the 1) which shows an annular member. It is explanatory drawing (the 2) which shows an annular member. It is explanatory drawing (the 1) which shows protrusion and its periphery. It is explanatory drawing (the 2) which shows protrusion and its periphery. It is explanatory drawing (the 3) which shows protrusion and its periphery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Lens barrel connection mechanism 101 Appearance holding member 102 Rotating body 103 Holding member 104 Appearance member 105 Annular member 106 Flange 304, 401 Protrusion

Claims (8)

A first tube portion having a first end surface orthogonal to the optical axis direction, and a second tube portion having a second end surface provided on the eyepiece side of the first end surface in the optical axis direction. A fixed cylinder;
On the outer peripheral side of the fixed cylinder, a ring-shaped member that is rotatable relative to the fixed cylinder about the optical axis;
A plurality of elastic protrusions provided on the ring-shaped member and projecting toward the eyepiece side and the object side of the ring-shaped member so as to be in pressure contact with the first end surface and the second end surface;
A lens barrel coupling mechanism comprising: The ring-shaped member has an annular shape centered on the optical axis on the inner peripheral side of the ring-shaped member, and the ring-shaped member rotates between the first end surface and the second end surface. Equipped with a rotatable rotating part,
2. The lens barrel coupling mechanism according to claim 1, wherein the plurality of elastic protrusions are arranged on an eyepiece side and an object side of the rotating unit, respectively.   The plurality of elastic protrusions are arranged at equal intervals on concentric circles centered on the optical axis on the eyepiece side and the objective side of the rotating member, respectively. The lens barrel connection mechanism.   4. The lens barrel coupling mechanism according to claim 3, wherein the same number of the plurality of elastic protrusions are provided on each of the eyepiece side and the object side of the rotating member.   The plurality of elastic protrusions are arranged so as to protrude alternately on the eyepiece side and the object side of the rotating member on a concentric circle centered on the optical axis. Lens barrel connection mechanism.   The lens barrel coupling mechanism according to any one of claims 1 to 5, wherein the plurality of elastic protrusions have a curved shape with tips protruding toward the pair of lens barrels. A lens provided so as to be movable in the optical axis direction;
The lens barrel coupling mechanism according to claim 6;
A lens moving mechanism for moving the lens in the optical axis direction along with the rotation of the ring-shaped member provided in the lens barrel connecting mechanism;
A lens device comprising: An image sensor that generates an electrical signal obtained by photoelectrically converting incident light; and
A lens device according to claim 7;
An optical member that causes the light incident through the lens device to enter the imaging device;
An imaging apparatus comprising:

Images