JP2014106519A - Lens device, and image capturing apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens supporting member that is fixed close to a rotationally manipulating ring and is compatible with various rotationally manipulated accessories.SOLUTION: A lens device including a movable optical member, a drive ring that can rotate around an optical axis and drives the optical member by the rotation, and a fixed unit fixed to a lens barrel close to the drive ring, is further provided with a support adaptor which is a support adaptor detachably fixed to the fixed unit and is linked to a support member extending in a direction of the optical axis and fixed to an image capturing apparatus, to which the lens device is detachably connected, to support the lens device. The support adaptor is provided with two or more linking fixed units, separated from each other in the direction of the optical axis, to be linked and fixed to the support member.

Description

  The present invention relates to a lens apparatus, and more particularly to a lens apparatus having a support member for supporting a lens and an imaging apparatus having the same.

  A conventional lens device has a lens support member for connecting to a guide plate or a guide bar installed below the camera in order to stably hold the lens when mounted on a tripod. For example, in Patent Document 1, the plate member and the lens mounting portion are connected to stably support the lens, and in Patent Document 2, the bar member has a lens holding member whose position can be adjusted by the center of gravity of the lens. .

JP 2003-295288 A JP 2007-163617 A

  In cinema shooting, the rotation operation accessory that can be operated by connecting the rotation operation gear of the lens unit is fixed to the guide bar extended from the camera fixing unit so that the photographer can easily perform focusing and zooming operations. To do.

  When the lens support member is provided at a position close to the rotation operation ring of the lens device and firmly fastened to the guide bar, the above-described conventional example has the following problems. In other words, it is not possible to deal with rotational operation accessories that have various shapes and structures, and it is necessary to prepare a plurality of dedicated support members according to each accessory, or to provide a plurality of positions to be connected to the support members on the lens side. is there.

  Accordingly, an object of the present invention is to provide a lens apparatus including a lens support member that is fixed in the vicinity of a rotation operation ring and that is compatible with various rotation operation accessories, and an imaging apparatus having the lens apparatus.

  In order to achieve the above object, a lens device according to the present invention includes a movable optical member, a drive ring that can rotate around the optical axis, and drives the optical member by the rotation, and a mirror close to the drive ring. A lens device having a fixing portion fixed to a cylinder is a support adapter that is detachably fixed to the fixing portion, and is fixed to an imaging device to which the lens device is detachably connected and is arranged in an optical axis direction. A support adapter connected to the extending support member and supporting the lens device, the adapter separating at least two or more connection fixing portions for connecting and fixing with the support member in the optical axis direction; It is characterized by comprising.

  According to the present invention, it is possible to provide a lens apparatus including a lens support member that is fixed in the vicinity of the rotation operation ring and that is compatible with various rotation operation accessories, and an imaging apparatus having the lens apparatus.

1 is an overall view of a lens apparatus according to Example 1 of the present invention. It is the figure which showed A view of FIG. 1 of the lens apparatus of Example 1 of this invention. It is the figure which showed the BB cross section of FIG. 2 of the lens apparatus of Example 1 of this invention. 1 is an overall view of a lens apparatus according to Example 1 of the present invention. It is a whole figure of the lens apparatus of Example 2 of this invention. It is the figure which showed CC cross section of FIG. 5 of the lens apparatus of Example 2 of this invention. It is a general view of the lens apparatus of Example 3 of the present invention. It is the figure which showed the DD cross section of FIG. 7 of the lens apparatus of Example 3 of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is an overall view of a lens apparatus according to the present embodiment, FIG. 2 is a diagram showing a view A in FIG. 1, and FIG. 3 is a diagram showing a cross section taken along line BB in FIG. 4A and 4B are general views of the lens apparatus in which the position of the lens support bar is different from that in FIG.

  The outline of the lens device will be described with reference to FIGS. The lens body 1 includes a fixed portion 21 fixed to the lens barrel, and a focus operation gear 20 and an iris operation gear 23 that are drive rings that can rotate around the optical axis. The focus operation gear 20 can be rotated to drive a focus lens group, which is a movable optical member (not shown) included in the lens body 1 to move on the optical axis, thereby adjusting the focus of the lens body 1. When the iris operation gear 23 is rotated, the size of the aperture area of the aperture mechanism portion which is a movable optical member (not shown) built in the lens body 1 can be adjusted, and the aperture value of the lens body 1 can be changed. The lens body 1 is coupled via a lens mount 24 to a camera 70 having an image sensor such as a CCD. The camera 70 is connected to a camera plate 71 located on the lower surface, and the camera plate 71 is fixed to a tripod or the like (not shown) with screws. The camera plate 71 has two bar members 5a, and functional accessories that give various functions such as a mat box 60, a focus rotation operation accessory 53a, and a lens support base 43 can be fixed to the bar member 5a. . The bar member 5a, which is a support member, is configured to be indirectly fixed to the imaging device to which the lens device is detachably connected via the camera plate 71 and extend in the optical axis direction. There is no limitation, and the bar member 5a may be directly fixed to the imaging device and may extend in the optical axis direction. Here, the mat box 60 is represented by an imaginary line (two-dot chain line) in the drawing. The mat box 60 is used for shielding unnecessary disturbance light. In addition, when the rotation operation accessory 51 is rotated, the focus rotation operation accessory 53a transmits the rotational force to the focus operation gear 20 of the lens body 1 through the connection gear 52 to perform the focus operation.

  Next, the lens support portion of the lens apparatus will be described with reference to FIGS. The lens body 1 has a fixing portion 21 that is fixed between the focus operation gear 20 and the iris operation gear 23. The fixing portion 21 has a screw portion 22, and the lens supporting adapter 2 a can be fixed to the lens body 1 by fastening with the adapter fixing screw 4 included in the lens supporting adapter 2 a. The lens support adapter 2a has a shape that does not interfere with the focus operation gear 20 and the iris operation gear 23 so that the lens support adapter 2a can be reversed left and right on the paper surface and fixed to the fixing portion 21. Further, as shown in FIG. 2, the lens support adapter 2a is shaped so that the left protrusion (object side in the optical axis direction) is centered on the adapter fixing screw 4 and the right protrusion (image side in the optical axis direction). It has a large left-right asymmetric shape (a shape asymmetric with respect to the optical axis direction). Below the lens support adapter 2a, there are screw portions 3a and 3b (connection fixing portions) as shown in FIG. The screw portion 3a is on the side protruding to the left side of the lens support adapter 2a, and the screw portion 3b is located below the adapter fixing screw 4 on the same plane perpendicular to the optical axis (different rotational positions around the optical axis). . That is, the screw portions 3a and 3b are formed apart from each other in the optical axis direction. The lens support base 43 is fixed by tightening a fixing knob 44 to the bar member 5a. The lens support base 43 has a screw portion that meshes with the screw portion 41 of the lens support rod 40, and the height relative to the lens support base 43 can be adjusted by rotating the lens support rod 40. After adjusting the height of the lens support rod 40 and coming into contact with the lens support adapter 2a, the lens main body 1 is attached to the bar member 5a by fastening the fixing screw 42 to the screw portions 3a and 3b of the lens support adapter 2a. And fixed. In FIG. 3, the adapter fixing screw 4 is fastened to the screw portion 3a.

  Next, a case where the attachment position of the lens support bar 40 to the bar member 5a is different from that in FIG. 1 will be described with reference to FIGS. 4 (a) and 4 (b).

  FIG. 4A shows a focus rotation operation accessory 53b with respect to FIG. Since the focus rotation operation accessory 53b shown in FIG. 4A is different from the focus rotation operation accessory 53a in FIG. 1 in the position and size of the connecting gear, the position on the bar member 5a is close to the mat box 60. It is a position. Therefore, the lens support adapter 2a is fixed at a position reversed left and right with respect to FIG. 1, and the lens support base 43 is moved to a position where the fixing screw 42 can be fastened to the screw portion 3b of the lens support adapter 2a. It fixes to the member 5a.

  FIG. 4B shows a case where the lens support adapter 2a is attached so as to be compatible with the focus rotation operation accessory 53c with respect to the case illustrated in FIG. Since the focus rotation operation accessory 53c shown in FIG. 4B is different from the focus rotation operation accessory 53a in FIG. 1 in the position and size of the connecting gear, the position to be connected and fixed to the bar member 5a is the same as in FIG. It is between the fixed positions in the case shown in (a). Therefore, the lens support adapter 2a is fixed in a state where the lens support adapter 2a is reversed left and right with respect to FIG. 1 (rotated by 180 ° about the direction perpendicular to the optical axis at the fixed position with the fixing portion 21). The fixing screw 42 moves to a position where it can be connected to the screw portion 3a of the lens support adapter 2a and is fixed to the bar member 5a.

  As described above, in this embodiment, the lens support adapter 2a can be fixed by changing the mounting direction of the lens device 2 to the fixing unit 21 of the lens device, and the screw fastening position with the lens support bar 40 can also be changed. Yes, this configuration can be used for various focus rotation operation accessories. In this embodiment, the case where different focus rotation operation accessories are used has been described. However, the present invention can be similarly applied to combinations of various lens accessories such as a lens support portion, a mat box, and an electric operation accessory.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible in the range of the summary.

FIG. 5 is an overall view of a lens apparatus according to the second embodiment of the present invention, and FIG. 6 is a sectional view taken along the line CC in FIG.
With reference to FIG. 5 and FIG. 6, attachment of the electric operation accessory 54 will be described.

  The present embodiment is different from the first embodiment in that the lens support adapter 2a is a lens support adapter 2b, and the other structures are the same as those of the first embodiment. The lens support adapter 2b has two bar members 5b (holding portions). The bar member 5b has the same diameter as that of the bar member 5a, and an accessory (functional accessory) for lens operation can be attached to the bar member 5b without being held by the bar member 5a. In this embodiment, the electric operation accessory 54 is attached to the bar member 5b. The electric operation accessory 54 incorporates a servo motor (not shown), and is supplied with power and a control signal via a cable 56. The electric operation accessory 54 is fixed on the bar member 5 b so that the connecting gear 55 meshes with the iris operation gear 23. When the servo motor of the electric operation accessory 54 rotates, the connection gear 55 rotates, and the iris operation gear 23 connected to the gear also rotates to change the aperture value.

As described above, in this embodiment, even when the mounting space for the electric operation accessory 54 cannot be secured on the bar member 5a extending from the camera plate 71, it can be attached to the bar member 5b included in the lens support adapter 2a. Increase operational scalability. In this embodiment, the electric operation accessory 54 is mounted on the bar member 5b, but the present invention can be similarly applied to an operation accessory such as a focus rotation operation accessory.
As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible in the range of the summary.

FIG. 7 is an overall view of a lens apparatus according to the third embodiment of the present invention, and FIG. 8 is a sectional view taken along the line DD in FIG.
The setting of the operation range of the focus operation gear 20 will be described with reference to FIGS.

  This embodiment is different from the first embodiment in that the lens support adapter 2a is a lens support adapter 2c, and the other structure is the same as that of the first embodiment. The lens support adapter 2 c has an operation end restricting portion 6 that comes into contact with the stopper member 25 attached to the lens body 1. The operation end restricting portion 6 is an elastic member such as rubber in order to absorb an impact when the stopper member 25 comes into contact, and is adhesively fixed or integrally molded to the lens support adapter 2c. The stopper member 25 is fixed to the stopper ring 26 by screwing. The stopper ring 26 is engaged on the outer periphery of the focus operation gear 20, is fixed to the focus operation gear 20 by a fixing screw 27, and protrudes outward in the radial direction with the optical axis as the center from the outer periphery. In FIG. 8, when the focus operation gear 20 rotates counterclockwise by an angle v on the paper surface, the stopper member 25 comes into contact with the operation end restricting portion 6 on the lens support adapter 2c. The angle v is an angle that is within a movable range of the focus operation gear 20 provided in the lens body 1. The position of the stopper ring 26 can be adjusted in the fixed position to the focus operation gear 20 by the range of the long groove 28 provided in the stopper ring 26, and the angle v changes depending on the position.

  As described above, in this embodiment, when it is desired to restrict the focus operation gear 20 at an arbitrary position, the lens support adapter 2c provided in the vicinity of the focus operation gear 20 is regulated, so that a member for regulation is separately provided. There is no need to provide it. In this embodiment, the restriction on the focus operation is described as a movable optical member, but it may be applied to a rotation operation accessory such as an iris or zoom.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible in the range of the summary.

  The lens apparatus of the present invention including the above-described characteristic lens support adapter and various types of imaging apparatuses that can capture the subject image formed by the lens apparatus can enjoy the effects of the present invention. It is possible to provide a photographing apparatus corresponding to a functional accessory including a rotation operation accessory.

1 Lens body 2a, 2b, 2c Lens support adapter (support adapter)
3a, 3b Screw part (connection fixing part)
5a Bar member (support member)
20 Focus operation gear (movable optical member)
21 Fixed part 30 Iris operation gear (movable optical member)

Claims (7)

A movable optical member;
A drive ring that is rotatable about an optical axis and that drives the optical member by the rotation;
A fixed portion fixed to the lens barrel in proximity to the drive ring;
The lens device having
A support adapter that is detachably fixed to the fixing portion, and is connected to a support member that is fixed to an imaging device to which the lens device is detachably connected and extends in an optical axis direction, and supports the lens device. With a support adapter,
The support adapter includes at least two or more connection fixing portions that are connected and fixed to the support member and are spaced apart in the optical axis direction.
A lens device.   The support adapter has an asymmetric shape in the optical axis direction around a fixed position with the fixed portion, and is rotated by 180 ° about the direction perpendicular to the optical axis at the fixed position with the fixed portion. The lens device according to claim 1, wherein the lens device can be fixed to the fixing portion.   The lens apparatus according to claim 1, wherein the support adapter includes a holding unit that holds a functional accessory that gives a function to the lens apparatus.   The lens apparatus according to claim 3, wherein the functional accessory is a rotational operation accessory that transmits a rotational force to the drive ring.   The lens apparatus according to claim 3, wherein the functional accessory is a mat box. A stopper member fixed at an arbitrary position on the outer periphery of the drive ring and protruding outward from the outer periphery;
The support adapter has an operation end restricting portion that comes into contact with the stopper member.
The lens device according to claim 1, wherein the lens device is a lens device.   An imaging apparatus comprising: the lens apparatus according to claim 1; and an imaging apparatus that captures a subject image formed by the lens apparatus.

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