JP2019144440A - Lens device - Google Patents

Abstract

To provide a lens device including a support member that, for example, is proximately fixed to a rotation operation ring without relying on an outer peripheral shape of the lens device, and deals with various rotation operation accessories.SOLUTION: In a lens device 200, a cylinder-shape housing has: a first housing part 2 that has an exterior peripheral surface of a first form; and a second housing part 6 that has a second exterior peripheral surface of a second form, and a support member 700 lies between the housing and holding means 800 to support the lens device. The support member has a fixation part that is configured so as to be detachably fixable to the exterior peripheral surface different in the form. The support member may be the fixation part that serves fixation parts 14a and 14b different in the form, or that has elastically deformable elastic members 43a and 43b provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a lens apparatus.

  A conventional lens device has a support member installed below the lens device for connecting to a guide plate or a guide bar in order to stably hold the device when mounted on a tripod. 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 position of the center of gravity of the lens.

JP 2003-295288 A JP 2007-163617 A

  However, in the conventional lens device, the following can occur. In cinema shooting, a camera fixing unit located below the camera device that connects the rotation operation accessory that can be operated by gear coupling with the rotation operation gear unit of the lens unit so that the photographer can easily perform focusing and zooming operations. It is fixed to the support shaft extended from When a lens support member is provided at a position close to the rotation operation ring of the lens device and is firmly fastened to the support shaft, the following points can be pointed out in the above example. In other words, it is not possible to cope with rotational operation accessories having various shapes and structures, and it is necessary to prepare a plurality of dedicated support members for each accessory. In addition, it is possible to provide a plurality of mounting positions on the lens device side for fixing the support member, but the lens device generally has a different outer peripheral shape in the optical axis direction depending on the outer diameter and structure of the included lens. Therefore, it is necessary to prepare a support member corresponding to the shape.

  In view of the above problems, a lens device according to one aspect of the present invention is a lens device having a cylindrical housing and a support member that is interposed between the housing and the holding unit and supports the lens device. The housing includes a first housing part having an outer peripheral surface of a first form, and a second housing part having an outer peripheral surface of a second form, and the support member It has a fixing part of a different form which can be detachably fixed to the outer peripheral surface of the first form and the outer peripheral face of the second form.

  In view of the above problems, a lens device according to another aspect of the present invention includes a cylindrical housing, and a support member that is interposed between the housing and the holding unit and supports the lens device. An apparatus, wherein the housing includes a first housing portion having an outer peripheral surface of a first form, and a second housing portion having an outer peripheral surface of a second form, and the support member is And a fixing portion provided with an elastic member capable of elastic deformation so as to be detachably fixed to the outer peripheral surface of the first form and the outer peripheral surface of the second form.

  According to the present invention, for example, it is possible to provide a lens apparatus including a support member that is fixed in the vicinity of the rotation operation ring and does not depend on the outer peripheral shape of the lens apparatus, and supports various rotation operation accessories.

1 is a schematic side view of a lens apparatus having a configuration according to an embodiment of the present invention. 1 is a schematic top view of a lens apparatus having a configuration according to an embodiment of the present invention. The lens apparatus of the structure based on the Example of this invention, and the one part schematic side view of a supporting member. The schematic diagram which looked at the lens apparatus and support member of the structure concerning the Example of this invention from the front. The lens apparatus of the structure based on the Example of this invention, and the one part schematic side view of a supporting member. The schematic diagram which looked at the lens apparatus and support member of the structure concerning the Example of this invention from the front. The front schematic diagram of the supporting member of the composition concerning other examples of the present invention. The schematic diagram which looked at the lens apparatus and support member of the structure concerning the other Example of this invention from the front. The schematic diagram which looked at the lens apparatus and support member of the structure concerning the other Example of this invention from the front.

  In the lens device according to the present invention, the cylindrical housing has a first housing portion having an outer peripheral surface of the first form, and a second housing portion having an outer peripheral surface of the second form, A support member is interposed between the housing and the holding unit and supports the lens device. And a supporting member has a fixing | fixed part comprised so that it could detachably fix to the outer peripheral surface of a different form. In the lens device according to one aspect of the present invention, the support member has fixing portions of different forms that can be detachably fixed to the outer peripheral surfaces of different forms. In the lens device according to another aspect of the present invention, the support member has a fixing portion provided with an elastic member that can be elastically deformed so as to be detachably fixable to outer peripheral surfaces of different forms.

Embodiments of the present invention will be described below in detail with reference to the drawings.
(Example 1)
1 and 2 are views showing an outline of the appearance of a lens apparatus having a configuration according to Embodiment 1 of the present invention. FIG. 1 shows the appearance from the side of the lens device, and FIG. 2 shows the appearance from the top.

  The lens apparatus 100 includes a lens body 200 and a drive unit 300 that performs operations of focusing, zooming, and aperture of the lens body 200. The lens body 200 and the drive unit 300 are detachably fixed by a fixing screw (not shown). The lens device 100 is detachably connected to the camera device 400 via a lens mount (not shown). Below the camera device 400, the camera device 400 and the camera fixing base 500 are detachably connected by a fixing screw (not shown) to hold the camera device 400. Further, on the front side of the camera fixing base 500, support shafts 600a and 600b, which are holding means for supporting the lens device 100, are inserted into two insertion holes 1a and 1b provided in the camera apparatus fixing base 500, respectively. ing. The support shafts 600a and 600b are fixed to both sides of the camera fixing base 500 so as to be detachable with fixing screws (not shown).

  The lens body 200 is provided with a cylindrical front case 2 from the front side, a cylindrical middle case 6 provided with a focus rotation gear 3, a zoom rotation gear 4, and an aperture rotation gear 5, and a lens mount. And a cylindrical mount-side housing 7. The front housing 2 which is the first housing portion having the outer peripheral surface of the first form is provided with an operation ring 8 which rotates simultaneously with the focus rotation gear 3 and is made of an elastic member such as rubber. The focus rotation gear 3, zoom rotation gear 4, and aperture rotation gear 5 are in mesh with drive gears (not shown) included in the drive unit 300. The zoom unit 9 is driven by the zoom operation unit 9 of the drive unit 300 or an operation unit (not shown) that is connected to the drive unit 300 and performs focus and aperture operations. The focus rotation gear 3, zoom rotation gear 4, aperture rotation gear 5, and operation ring 8 can be electrically operated using an electric-manual switching means (not shown) provided in the drive unit 300. is there. Further, when the operator switches to the manual side, it is also possible to operate by rotating the respective rotating gears directly.

  A support member 700 that supports the lens body 200 is provided below the front housing 2. The support member 700 is detachably fixed to the front housing 2 by a fixing screw described later, and plays a role of supporting and supporting the support shafts 600a and 600b. The support member 700 is connected to support shafts 600a and 600b as holding means via a lens fixing base 800 as holding means. The support member 700 and the lens fixing base 800 are detachably fixed by a fixing screw to be described later, and the lens fixing base 800 is also detachably connected to the support shafts 600a and 600b by a structure to be described later. The support member 700 has a structure that will be described later, and is also detachably fixed to the middle housing 6 that is the second housing portion having the outer peripheral surface of the second form.

  3, 4, 5, and 6 are schematic diagrams illustrating an overview of the lens device and the support member 700 according to the present embodiment. 3 and 4 show a state in which the support member 700 is connected to the lower side of the front housing 2, while FIGS. 5 and 6 show a state in which the support member 700 is connected to the middle housing 6.

  FIG. 3 is a schematic view of the support member 700 viewed from the side surface of the lens body 200, and FIG. 4 is an overview of a cross section of the support member 700 viewed from the front side of the lens body 200. The support member 700 includes fixing screws 10 a and 10 b for connecting to the lens body 200 side, and is screwed and fastened to screw portions 11 a and 11 b provided on the curved surface of the outer peripheral bottom surface of the front housing 2. The The fixing screws 10a and 10b have screw portions 12a and 12b screwed to the screw portions 11a and 11b, respectively, and hand-turning knob portions 13a and 13b at opposite ends.

  When connecting the support member 700 to the front housing 2, the knob portions 13a and 13b are turned to connect. At this time, the support member 700 is in contact with the outer peripheral bottom surface of the front housing 2 at the mounting surfaces 14a and 14b which are fixed portions having curved surfaces (curved surfaces having the same curvature radius, etc.) that are substantially equal to the curved surface of the outer peripheral bottom surface of the front housing 2. To do. In the mounting surfaces 14a and 14b, the fixing screws 10a and 10b are held by the support member 700 in a state of penetrating through counterbores 16a and 16b and screw holes 17a and 17b provided in the arm portion 15 of the support member 700. . When the support member 700 is removed from the front housing 2, the knob portions 13a and 13 are turned in a direction in which the fastening is weakened. Then, the screwed state of the screw parts 12a, 12b and the screw parts 11a, 11b is released, the screw parts 12a, 12b are accommodated in the counterbore holes 16a, 16b, and the support member 700 can be removed. At this time, since the screw portions 12a and 12b are caught in the screw holes 17a and 17b in a state where the fixing screws 10a and 10b are not rotated, the fixing screws 10a and 10b are not easily detached from the support member 700. When the knobs 13a and 13b are further rotated, the screw parts 12a and 12b are once screwed into the screw holes 17a and 17b, and finally the screwed state is released, and the fixing screws 10a and 10b are detached from the support member 700. . The removed fixing screws 10a and 10b are used when the support member 700 is fixed to another position. The mounting surfaces 14a and 14b, which are fixed portions, are provided on the surface of the support member 700 that extends in a direction intersecting a line parallel to the optical axis of the lens device (such as a direction orthogonal) and faces the casing. The above structure is formed symmetrically across the line parallel to the optical axis.

  In the support column 700 of the support member 700, a screw portion 20 that is screwed with the fixing screw 19 of the lens fixing base 800 is provided on the lens fixing base 800 side. The fixing screw 19 has a screw portion 21 at the tip and a knob portion 22 at the opposite end, and passes through the counterbore hole 23 and the screw hole 24 of the lens fixing base 800 to fix the lens. It is held on the base 800. When the support member 700 is removed from the lens fixing base 800, the knob portion 22 is rotated in a direction in which fastening is weakened. Then, the screwed state between the screw portion 21 and the screw portion 20 is released, the screw portion 21 is accommodated in the counterbore hole 23, and the support member 700 can be removed. At this time, since the screw portion 21 is caught in the screw hole 24, the fixing screw 19 does not easily come off from the lens fixing base 800.

  Next, the connection of the lens fixing base 800 to the support shafts 600a and 600b will be described. The support shaft 600 b side is held by using a movable piece 26 and a compression spring 27 provided on the housing 25 of the lens fixing base 800. The support shaft 600 b is inserted into the U groove portion 28 provided in the housing 25. At this time, the support shaft 600b is fixed by being inserted against the urging force in the direction in which the movable piece 26 urged in the right direction on the paper surface by the urging force of the compression spring 27 is pushed. On the other hand, the support shaft 600 a side is held using a fixing screw 30 inserted into the screw hole 29 on the side surface of the housing 25. When the knob portion 31 of the fixing screw 30 is turned, the screw portion 32 and the screw hole 29 of the fixing screw 30 are screwed together, and the top 33 at the tip of the fixing screw 30 is inserted into the U groove portion 34 of the housing 25. The support shaft 600a is held in contact with the side surface of the support shaft 600a.

  FIG. 5 is a schematic view of the support member 700 viewed from the side surface of the lens main body 200, and FIG. 6 is a schematic cross-sectional view of the support member 700 viewed from the front side of the lens main body 200. In addition, the same code | symbol is attached | subjected to the same part as the figure demonstrated previously. The difference from FIGS. 3 and 4 is that the support member 700 is attached to the curved surface of the outer peripheral bottom surface of the inner housing 6 of the lens body 200.

  The fixing screws 10a and 10b of the support member 700 are respectively screwed and fastened to the screw portions 35a and 35b provided on the curved surface of the outer peripheral bottom surface of the middle housing 6. Here, the effective diameter of the lens (not shown) included in the inner casing 6 is smaller than the effective diameter of the lens (not shown) included in the front casing 2, and the lens diameter is accordingly small. For this reason, the curved surface of the outer periphery of the middle housing 6 is smaller than the front housing 2. That is, the outer peripheral surface of the first form of the front housing 2 and the outer peripheral surface of the second form of the middle housing 6 each have a substantially cylindrical shape, and the diameter of the outer peripheral surface of the second form is the first It is smaller than the diameter of the outer peripheral surface of the form.

  When the support member 700 is connected to the middle casing 6, the knob portions 13a and 13b are turned and connected in the same manner as in FIGS. At this time, the support member 700 comes into contact with the middle housing 6 at the mounting surfaces 36 a and 36 b having curved surfaces substantially equal to the curved surface of the outer peripheral bottom surface of the middle housing 6. Here, on the mounting surfaces 36a and 36b, the fixing screws 10a and 10b are held by the support member 700 in a state of passing through the counterbored holes 37a and 37b and the screw holes 38a and 38b provided in the arm portion 15 of the support member 700. Has been. As described above, the mounting surfaces 14a and 14b and the mounting surfaces 36a and 36b, which are fixing portions of different forms, are the curved surface of the outer peripheral surface of the first form of the front housing 2 and the second surface of the middle housing 6, respectively. Corresponding to the curved surface of the outer peripheral surface of the form, it has different curved surfaces (surfaces with different curvature radii, etc.).

  By the way, when the support member 700 is connected to the lens fixing base 800 in a state where it is connected to the middle housing 6, a difference in distance from each of the front housing 2 and the middle housing 6 to the lens fixing base 800. In order to compensate for this, the auxiliary column 39 is connected. A screw portion 40 that is screwed with the screw portion 20 of the support member 700 is provided at the tip of the auxiliary column 39, and a screw portion 41 that is screwed with the fixing screw 19 of the lens fixing base 800 is provided on the opposite side. When the support member 700 is connected to the lens fixing base 800, the support member 700 is fixed by screwing with the respective screw portions.

  When the support member 700 is removed from the middle housing 6, the knob portions 13 a and 13 b are turned in a direction in which fastening is weakened. Then, the screwed state between the screw parts 12a, 12b and the screw parts 35a, 35b is released, the screw parts 12a, 12b are accommodated in the counterbore holes 37a, 37b, and the support member 700 can be removed. When the knobs 13a and 13b are further rotated, the screw parts 12a and 12b are once screwed into the screw holes 38a and 38b, and finally the screwed state is released, and the fixing screws 10a and 10b are detached from the support member 700. . The support member 700 can be connected to the front housing 2 by screwing the removed fixing screws 10a and 10b into the screw holes 17a and 17b once so that the screw portions 12a and 12b are accommodated in the counterbores 16a and 16b. It becomes a state.

  Here, the attachment surfaces 36a and 36b are located below the curved upper surface of the arm portion 15 of the support member 700 so that the attachment surfaces 14a and 14b do not interfere with the outer peripheral curved surface of the intermediate housing 6 when attached to the intermediate housing 6. It is arranged to shift to. On the other hand, the attachment surfaces 14 a and 14 b are disposed above the attachment surfaces 36 a and 36 b so that the attachment surfaces 36 a and 36 b do not interfere with the outer peripheral curved surface of the front housing 2 when attached to the front housing 2. Therefore, the support column 700 can be connected to different curved surfaces of the front housing 2 and the middle housing 6. That is, the mounting surface which is a fixing portion of a different form includes a first contact surface (mounting surfaces 14a and 14b) that contacts the outer peripheral surface of the first form and an outer peripheral surface of the second form, respectively. It is the 2nd contact surface (attachment surface 36a, 36b) contact | abutted when it fixes to. The first contact surface and the second contact surface are disposed at positions that do not interfere with each other when they contact each other.

  3 to 6, the fixing screws 10a and 10b are shared when connecting to the front housing 2 and the middle housing 6, but each may correspond to a separate fixing screw. Further, in this embodiment, the fixed surfaces of the front housing 2 and the middle housing 6 are curved, but when the support columns 700 are connected at the respective positions, the mounting surfaces of the support columns 700 do not interfere with each other. If arrangement is possible, it is not limited to a curved surface.

  As described above, according to the present embodiment, the support member having different contact surfaces according to different outer peripheral curved surfaces of the lens body is fixed in the vicinity of the rotation operation ring with one support member, and various rotation operation accessories are provided. It is possible to respond according to.

(Example 2)
7, 8, and 9 are schematic views showing an outline of a support member having a configuration according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as the figure demonstrated previously, and description of each function is abbreviate | omitted.

  FIG. 7 shows an outline of a cross section of the support member 900 viewed from the front side of the lens body 1000. FIG. 8 shows a state where the support member 900 is attached to the front housing 44 of the lens body 1000. On the other hand, FIG. 9 shows an outline of a state in which the support member 900 is attached to the inner housing 45.

  The difference from the configuration of the first embodiment is that an elastic member is provided on the attachment surface of the support member to the lens body. The arm portion 42 of the support member 900 is provided with elastic members 43a and 43b made of a rubber material or an elastomer-based soft resin material. The elastic members 43a and 43b contact the curved surface of the front casing 44 or the middle casing 45 of the lens body 1000 except for the holes through which the fixing screws 10a and 10b penetrate, and deform according to the fixing screws 10a and 10b. To do. Further, the contact surfaces 46a and 46b at which the knob portions 13a and 13b of the fixing screws 10a and 10b are in contact with the arm portion 42 when mounting to the lens body 1000 are substantially curved surfaces having a small diameter. The contact surfaces 46a and 46b are fixed when the screw portions 12a and 12b of the fixing screws 10a and 10b are screwed into the screw portions 47a and 47b of the front housing 44 or when the screw portions 48a and 48b of the middle housing 45 are fastened. When it is screwed and fastened, it responds as follows. In other words, this corresponds to the change of the surfaces of the knob portions 13a and 13b in accordance with the difference in inclination of the fixing screws 10a and 10b when the front housing 44 or the middle housing 45 is used.

  The fixing screws 10a and 10b are held by the support member 900 in a state of penetrating through counterbored holes 49a and 49b and screw holes 50a and 50b provided in the arm portion 42 with respect to the contact surfaces 46a and 46b. When the support member 900 is removed from the front housing 44, the knob portions 13a and 13 are turned in a direction in which fastening is weakened. Then, the screwed state of the screw parts 12a, 12b and the screw parts 47a, 47b is released, the screw parts 12a, 12b are accommodated in the counterbore holes 49a, 49b, and the support member 900 can be removed. And elastic member 43a, 43b returns to an original shape.

  The same operation is performed when the support member 900 fixed to the inner casing 45 is removed. In addition, the column portion 51 of the support member 900 is provided with a screw portion 52 that is screwed with the fixing screw 19 of the lens fixing base 800 on the lens fixing base 800 side. The column portion 51 of the support member 900 can be connected to the lens fixing base 800 through the auxiliary column 39 by the same operation as in the first embodiment.

  As described above, according to the present embodiment, by providing an elastic member on the contact surface of the support member with the lens main body, the support member is fixed in the vicinity of the rotation operation ring with one support member, and can be used for various rotation operation accessories. You can respond accordingly. Further, since the contact surface is shared, the support member itself is downsized.

  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 within the range of the summary.

2 ... Front housing (tubular housing, first housing)
6 ... Middle housing (tubular housing, second housing)
14a, 14b ... Mounting surface (fixed part)
200: Lens body (lens device)
600a, 600b ... support shaft (holding means)
700... Support member 800... Lens fixing base (holding means)

Claims (8)

A lens device having a cylindrical housing, and a support member that supports the lens device interposed between the housing and the holding unit,
The housing includes a first housing portion having an outer peripheral surface of a first form, and a second housing portion having an outer peripheral surface of a second form,
The lens device according to claim 1, wherein the support member has different types of fixing portions that can be detachably fixed to the outer peripheral surface of the first form and the outer peripheral surface of the second form.   2. The fixing portion having the different form has different curved surfaces corresponding to the curved surface of the outer peripheral surface of the first form and the curved surface of the outer peripheral face of the second form, respectively. Lens device.   The different forms of fixing portions are respectively contacted with the first contact surface when fixed to the outer peripheral surface of the first configuration and the second contact when fixed to the outer peripheral surface of the second configuration. The first contact surface and the second contact surface are arranged at positions that do not interfere with each other when the first contact surface and the second contact surface contact each other. Lens device. A lens device having a cylindrical housing, and a support member that supports the lens device interposed between the housing and the holding unit,
The housing includes a first housing portion having an outer peripheral surface of a first form, and a second housing portion having an outer peripheral surface of a second form,
The support member has a fixing portion provided with an elastic member that can be elastically deformed so as to be detachably fixed to the outer peripheral surface of the first form and the outer peripheral surface of the second form. A lens device.   The lens device according to claim 6, wherein a material of the elastic member of the fixing portion is a rubber material or a resin material that contacts the outer peripheral surface of the first form or the outer peripheral surface of the second form. .   The outer peripheral surface of the first form and the outer peripheral surface of the second form each have a cylindrical shape, and the diameter of the outer peripheral face of the second form is smaller than the diameter of the outer peripheral face of the first form. The lens device according to claim 1, wherein the lens device is a lens device.   The said fixing | fixed part is provided in the surface which extends in the direction which cross | intersects the line parallel to the optical axis of the said lens apparatus, and opposes the said housing | casing. The lens device described.   The lens apparatus according to claim 1, further comprising an auxiliary support column interposed between the holding unit and the support member to assist the support by the support member.