JP2012247728A - Lens barrel attachment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel attachment apparatus capable of stably holding a lens barrel.SOLUTION: A lens barrel attachment apparatus 1 is characterized by including: an annular body 2 having an inner periphery surface in a substantially annular shape through which a lens barrel 10 can be inserted; an adjustment member 4 for adjusting the distance between two points on the inner periphery surface of the annular body 2; and two or more projections 5 projecting inward on the inner periphery surface arranged in positions on the inner periphery surface and in the positions evading the adjusting direction that connects the two points on the inner periphery surface to adjust the distance by the adjustment member 4.

Description

  The present invention relates to a lens barrel mounting device.

  2. Description of the Related Art Conventionally, a lens barrel mounting device includes an annular body through which a cylindrical lens barrel can be inserted, and an adjustment member that adjusts the distance between two points on the inner peripheral surface of the annular body (for example, , See Patent Document 1). The inner peripheral surface of the annular body is formed flat. When the adjustment member is adjusted to shorten the distance between the two points on the inner peripheral surface of the annular body, the lens barrel is held by the inner peripheral surface.

JP-A-5-249356

  However, when the inner peripheral surface of the annular body is flat, when the distance in the tightening direction on the inner peripheral surface of the annular body is shortened, the lens barrel is supported only between two opposing points with a reduced distance. It will be. Even if the cylindrical lens barrel is supported only between two points in the radial direction, there is a problem that the lens barrel is difficult to stabilize.

  An object of the present invention is to provide a lens barrel mounting device that can stably hold a lens barrel.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this. The configuration described with reference numerals may be improved as appropriate, or at least a part of the configuration may be replaced with another component.

According to the first aspect of the present invention, there is provided an annular body (2) having a substantially annular inner peripheral surface through which the lens barrel (10) can be inserted, and two points on the inner peripheral surface of the annular body (2). An adjustment member (4) for adjusting the distance, and the inner peripheral surface provided at a position avoiding an adjustment direction connecting the two points, the inner peripheral surface of which is adjusted by the adjustment member (4). A lens barrel mounting device (1) comprising two or more protrusions (5) protruding toward the inside of the lens barrel.
The invention according to claim 2 is provided on an annular body (2) having a substantially annular inner circumferential surface through which the lens barrel (10) can be inserted, and an inner circumferential surface of the annular body (2), A lens barrel mounting device (1) comprising: three or more protrusions (5) protruding toward the inner side of the inner peripheral surface.
A third aspect of the present invention is the lens barrel mounting device (1) according to the second aspect, wherein the adjustment member (4) adjusts the distance between two points on the inner peripheral surface of the annular body (2). And the projection (5) is provided at a position avoiding the adjustment direction connecting the two points whose distance is adjusted by the adjustment member (4). Device (1).
A fourth aspect of the present invention is the lens barrel mounting device (1) according to the first or third aspect, wherein the adjustment direction is a diameter direction of the inner peripheral surface. This is a lens barrel mounting device (1).
A fifth aspect of the present invention is the lens barrel mounting device (1) according to the fourth aspect, wherein the protrusion (5) is disposed at a position of approximately 45 degrees with respect to the adjustment direction. This is a lens barrel mounting device (1).
The invention according to claim 6 is the lens barrel mounting device (1) according to any one of claims 1 to 5, wherein four or more of the protrusions (5) are provided. 1 is a lens barrel mounting device (1).
The invention according to claim 7 is the lens barrel mounting device (1) according to any one of claims 1 to 6, wherein the protrusions (5) are spaced apart from each other at an equal distance. The lens barrel mounting device (1) is characterized by being arranged.
The invention according to claim 8 is the lens barrel mounting device (1) according to any one of claims 2 to 7, wherein the protrusion (5) is along the inner peripheral surface. The lens barrel mounting device (1) is characterized by being provided continuously.
A ninth aspect of the present invention is the lens barrel mounting device (1) according to any one of the second to eighth aspects, wherein the annular body (2) has a thickness direction from the outside to the inside. A lens barrel mounting, further comprising: a pressing member (7) that penetrates through and protrudes from the inner peripheral surface and presses and fixes the outer peripheral surface of the lens barrel (10) against the inner peripheral surface. Device (1).
The invention according to claim 10 is the lens barrel mounting device (1) according to any one of claims 1 to 9, wherein the protrusion (5) is substantially trapezoidal in a side view. The lens barrel mounting device (1) is provided with a flat surface portion (51) capable of making line contact with the outer peripheral surface of the lens barrel (10).

  According to the present invention, it is possible to provide a lens barrel mounting apparatus that can stably hold a lens barrel.

It is a side view of the state holding the lens barrel with the lens barrel mounting device of the first embodiment of the present invention. It is a front view which shows the lens-barrel attachment apparatus of 1st Embodiment of this invention. It is a front view of the state which opened the annular body of the lens-barrel mounting apparatus. It is an expansion perspective view of the protrusion in a lens barrel attachment device. It is a front view which shows the lens-barrel mounting apparatus of 2nd Embodiment of this invention. It is a front view which shows the lens-barrel attachment apparatus of 3rd Embodiment of this invention. It is a front view which shows the lens-barrel attachment apparatus of 4th Embodiment of this invention. It is a front view which shows the lens-barrel attachment apparatus of 5th Embodiment of this invention.

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing a state in which a lens barrel 10 is held by the lens barrel mounting device 1. FIG. 2 is a front view showing the lens barrel mounting apparatus 1 according to the first embodiment of the present invention. FIG. 3 is a front view of the lens barrel mounting device 1 with the annular body 2 opened.

  The lens barrel mounting device 1 includes an annular body 2 through which the lens barrel 10 can be inserted, a seat body 3 provided on the annular body 2, and an adjustment member that adjusts the distance between two points on the inner peripheral surface of the annular body 2. 4 and an inner peripheral surface of the annular body 2 are provided with protrusions 5 projecting inward.

  The annular body 2 is rotatably fitted on the outer peripheral surface of the lens barrel 10. The annular body 2 has a substantially annular inner peripheral surface. The annular body 2 includes a movable body 21 and a fixed body 22 each having a substantially semicircular shape. The fixed body 22 is continuously integrated with the seat body 3. One end of the movable body 21 is connected to one end of the fixed body 22 by a hinge 21a so as to be opened and closed. As shown in FIG. 3, the state in which the other end of the movable body 21 is moved away from the other end of the fixed body 22 with the hinge 21 a as a fulcrum is the state in which the annular body 2 is opened. A cutout 21 b is provided at the other end of the movable body 21. When the notch 21b is engaged with the other end side of the fixed body 22, the annular body 2 becomes substantially circular. The state in which the notch 21b is engaged with the other end side of the fixed body 22 is a state in which the annular body 2 is closed.

  For example, flocked paper 23 is attached to the inner peripheral surface of the annular body 2 along the inner peripheral surface of the annular body 2 as a protective member for protecting the lens barrel 10.

  The seat body 3 is integrated with the annular body 2 and is fixed to a support leg (not shown) such as a tripod. The seat body 3 is formed in an L shape in a side view from one end of the fixed body 22. The seat body 3 has a bottom surface portion 31 that extends to the distal end side of the lens barrel 10 in a state where the lens barrel 10 is attached to the lens barrel mounting apparatus 1. A screw hole 32 for attaching to the support leg is provided in the bottom surface portion 31 in the thickness direction of the bottom surface portion 31.

  The adjusting member adjusts the distance between two points on the inner peripheral surface of the annular body 2, and specifically is the eccentric pin 4. The eccentric pin 4 has a rotation shaft that extends from the outer peripheral surface side to the inner peripheral surface side of the annular body 2 and has a center at a position that is eccentric with respect to the rotation shaft.

  The eccentric pin 4 is disposed at a position facing the hinge 21a. The notch 21b provided at the other end of the movable body 21 engages with the eccentric pin 4 when the annular body 2 is closed. The eccentric pin 4 can rotate with the notch 21b engaged. When the eccentric pin 4 rotates with the notch 21b engaged, the distance in the diameter direction of the inner peripheral surface of the annular body 2 is adjusted. Specifically, the distance between two points on the line 6 that is substantially orthogonal to the line connecting the rotation axis of the eccentric pin 4 and the hinge 21a is shortened. The direction in which the line 6 extends is an adjustment direction in which the distance between two points on the inner peripheral surface of the annular body 2 is adjusted by the eccentric pin 4.

  FIG. 4 is an enlarged perspective view of the protrusion 5 in the lens barrel mounting device 1. The flocked paper 23 is omitted for convenience of explanation.

  The protrusions 5 protrude toward the inside of the inner peripheral surface of the annular body 2 and are arranged on the inner peripheral surface of the annular body 2 at an equal distance from each other. As shown in FIGS. 1 and 2, the protrusion 5 is disposed at a position of 45 degrees with respect to the line 6 extending in the adjustment direction, avoiding the adjustment direction. The protrusions 5 are on the line (y) extending in the vertical direction of the annular body 2 and the line (x) extending in the radial direction through the optical axis 100 in a state where the lens barrel mounting device 1 is fixed to the support leg. Is provided.

  The protrusion 5 has a substantially trapezoidal shape in a side view, and has a flat portion 51 on the inner peripheral surface side of the annular body 2 that can come into line contact with the outer peripheral surface of the lens barrel 10. The plane portion 51 is a surface extending in the tangential direction between the lens barrel 10 and the protrusion 5. The protrusion 5 has two inclined surfaces 52 inclined from the inner peripheral surface of the annular body 2 toward the inside of the annular body 2, and two side surfaces 53 extending on the same plane as the side surface of the annular body 2.

  The protrusion 5 has the flat portion 51 of the protrusion 5 on the inner side of the inner peripheral surface on the line 6 with the distance between the two points on the line 6 on the inner peripheral surface of the annular body 2 adjusted to be the shortest. It is formed to have a protruding height.

Next, how to attach the lens barrel attaching device 1 will be described.
First, the screw hole 32 provided in the seat body 3 is aligned with the screw hole (not shown) of the support leg, and the screw is screwed into the screw hole 32 to attach the seat body 3 to the support leg. Then, in a state where the annular body 2 is opened, the lens barrel 10 is arranged inside the annular body 2, and the position is adjusted so that the annular body 2 can be fitted to the outer peripheral surface of the lens barrel 10. Then, the notch 21 b of the movable body 21 is engaged with the eccentric pin 4. As a result, the annular body 2 is closed, and the lens barrel 10 is loosely attached to the annular body 2. The lens barrel 10 may be first attached to the annular body 2 and then the seat body 3 may be attached to the support leg.

  Next, with the annular body 2 closed, the eccentric pin 4 is rotated to adjust the distance between two points on the inner peripheral surface of the annular body 2. When the eccentric pin 4 is rotated, the distance between two points on the line 6 substantially orthogonal to the line connecting the eccentric pin 4 and the hinge 21a becomes smaller. By rotating the adjusting member 4, the distance between two points on the line 6 becomes the smallest in the diameter direction on the inner peripheral surface. On the other hand, as the distance between the two points on the inner peripheral surface of the annular body 2 is adjusted to be shorter, the flat portion 51 of the protrusion 5 arranged at a position of 45 degrees with respect to the line 6 is aligned with the lens barrel 10. Contact and support the lens barrel 10.

As described above, this embodiment has the following effects.
(1) Two or more protrusions 5 are provided at positions avoiding the adjustment direction on the inner peripheral surface of the annular body 2. For this reason, even if the distance between the two points on the inner peripheral surface of the annular body 2 is reduced, the projections 5 provided at other positions come into contact with the lens barrel 10. The cylinder 10 is stably held.

(2) The protrusion 5 is provided at a position of 45 degrees with respect to the line 6 substantially orthogonal to the line connecting the adjustment member 4 and the hinge 21a. The protrusions 5 are provided on the line (y) extending in the vertical direction and the line (x) extending in the radial direction of the annular body 2 in a state where the lens barrel mounting device 1 is mounted on the support leg. When the lens barrel 10 is held by the annular body 2, one end or the other end of the lens barrel 10 is easily inclined downward due to gravity. However, according to this arrangement, since the projection 5 is provided on the annular body 2 so as to hold the lens barrel 10 in the vertical direction in which the lens barrel 10 is most likely to be tilted, the lens barrel 10 is held more stably.

(3) The protrusion 5 has a flat portion 51 that can be brought into line contact with the outer peripheral surface of the lens barrel 10. Each time the lens barrel 10 is held on the annular body 2, the contact point between the flat portion 51 and the lens barrel 10 changes. However, since the inside of the protrusion 5 is formed into a planar shape, the protrusion 5 can stably contact the outer peripheral surface of the lens barrel 10.

(4) Since the flocked paper 23 is affixed to the inside of the annular body 2, the lens barrel 10 is not easily damaged.

(Second Embodiment)
Next, a lens barrel mounting apparatus 1A that is a second embodiment of the present invention will be described. The same reference numerals are used for the same members as those described in the first embodiment.

  FIG. 5 is a front view showing a lens barrel mounting apparatus 1A of the second embodiment. In the first embodiment, the movable body 21 of the annular body 2 is connected to the fixed body 22 by the hinge 21a. However, in this embodiment, the entire circumference of the annular body 2A is formed substantially integrally. Further, a slot 24 is provided in a part of the annular body 2A. The slot 24 is a tear formed between the inner peripheral surface and the outer peripheral surface of the annular body 2A.

  In the first embodiment, the adjustment member is configured by the eccentric pin 4, but in the present embodiment, the adjustment member is configured by the screw member 4A. The screw member 4 </ b> A is provided in a direction orthogonal to the direction in which the slot portion 24 extends so as to narrow the interval between the slot portions 24.

  In the first embodiment, the protrusion 5 is provided on a line extending in the vertical direction (y) and the radial direction (x) on the inner peripheral surface of the annular body 2. In the present embodiment, the distance between two points on the inner peripheral surface of the annular body 2 is adjusted by narrowing the slot 24, so the adjustment direction is the radial direction. Therefore, the projections 5 are provided at four positions at 45 degrees with respect to the line (x) extending in the radial direction of the annular body 2A, avoiding the radial direction. The shape of the protrusion 5 is the same as that of the first embodiment.

  When the screw member 4A is loosened, the slot 24 is expanded. In a state where the slit portion 24 is expanded, the lens barrel 10 is inserted through the annular body 2A to align the position. When the screw member 4A is tightened, the distance between the two points in the radial direction of the annular body 2A is adjusted to be short. As the distance between the two points in the radial direction becomes shorter, the flat portion 51 of the protrusion 5 comes into line contact with the lens barrel 10 and supports the lens barrel 10.

  According to the second embodiment, even when the distance between the two points in the radial direction of the annular body 2A is shortened, the protrusion 5 arranged at a position avoiding the radial direction makes line contact with the lens barrel 10. For this reason, as in the first embodiment, the lens barrel 10 is stably held by the protrusions 5.

  Further, the protrusions 5 are arranged symmetrically in the radial direction across the line (y) extending in the vertical direction. For this reason, even if one end or the other end of the lens barrel 10 is inclined downward, the inclination of the lens barrel 10 is suppressed by the protrusion 5.

(Third embodiment)
Next, a lens barrel mounting apparatus 1B that is a third embodiment of the present invention will be described. The same reference numerals are used for the same members as those described in the first embodiment.

  FIG. 6 is a front view showing the lens barrel mounting device 1B of the third embodiment. In the first embodiment, four protrusions 5 are provided, but in this embodiment, six protrusions 5 are provided at an equal distance from each other. The shape of the protrusion 5 is the same as that of the first embodiment. Moreover, the adjustment member is comprised by the eccentric pin 4 similarly to 1st embodiment.

  When the eccentric pin 4 is rotated, the distance between two points on the line 6 is reduced. As the distance between the two points on the inner peripheral surface of the annular body 2A is adjusted to be short, the flat portions 51 of the six protrusions 5 arranged on the inner peripheral surface come into line contact with the lens barrel 10, and the lens barrel 10 is supported.

  According to the third embodiment, since the number of the protrusions 5 is formed more than in the first embodiment, the lens barrel 10 is supported by more surfaces. Therefore, the lens barrel 10 is held more stably.

(Fourth embodiment)
Next, a lens barrel mounting apparatus 1C that is a fourth embodiment of the present invention will be described. The same reference numerals are used for the same members as those described in the first embodiment.

  FIG. 7 is a front view showing a lens barrel mounting apparatus 1C of the fourth embodiment. In the first embodiment, four protrusions 5 are provided, but in this embodiment, the protrusions 5 </ b> C are provided continuously along the inner peripheral surface of the annular body 2. In the present embodiment, the area of the flat part 51C of the protrusion 5C is smaller than the area of the flat part 51 of the first to third embodiments. In addition, the interval between the adjacent protrusions 5C and 5C in the present embodiment is narrower than the interval between the protrusions 5 in the third embodiment. The adjustment member is configured by the eccentric pin 4 as in the first embodiment.

  When the eccentric pin 4 is rotated, the distance between the two points on the line 6 is reduced, and the annular body 2 is deformed. However, in the present embodiment, since the projections 5C finer than the projections 5 in the first to third embodiments are provided at a narrower interval, even when the annular body 2 is slightly deformed, the projections 5C are formed in the lens barrel. 10 is contacted.

  According to the fourth embodiment, even when the annular body 2 is slightly deformed, the plurality of protrusions 5C support the lens barrel 10, so that the lens barrel 10 is stably held.

(Fifth embodiment)
Next, a lens barrel mounting apparatus 1D that is a fifth embodiment of the present invention will be described. The same reference numerals are used for the same members as those described in the first embodiment.

  FIG. 8 is a front view showing a lens barrel mounting apparatus 1D of the fifth embodiment. In the first embodiment, the adjustment member is constituted by the eccentric pin 4, but in this embodiment, the adjustment member penetrates in the thickness direction from the outside to the inside of the annular body 2D and protrudes from the inner peripheral surface. Consists of. The pressing member is a pressing screw 7. The tip of the push screw 7 is formed in a curved surface so as not to damage the lens barrel 10.

  In the present embodiment, the protrusion 5 is disposed at a position avoiding the axial direction of the push screw 7. Four protrusions 5 are provided. The protrusion 5 is provided at a position of 45 degrees with respect to the axial direction of the push screw 7. The shape of the protrusion 5 is the same as that of the first embodiment.

  A lens barrel 10 is attached in advance to the annular body 2D. When the push screw 7 is rotated, the tip of the push screw 7 presses the outer peripheral surface of the lens barrel 10 against the inner peripheral surface of the annular body 2D, and the lens barrel 10 is fixed. Since the lens barrel 10 is pressed by the push screw 7, the lens barrel 10 is deformed so that the radius in the axial direction of the push screw 7 in the lens barrel 10 is shortened. However, even if the lens barrel 10 is deformed, the protrusion 5 arranged at a position avoiding the axial direction of the push screw on the inner peripheral surface of the annular body 2D makes line contact with the outer peripheral surface of the lens barrel 10, The lens barrel 10 is supported.

  According to the fifth embodiment, even if the axial radius of the push screw 7 in the lens barrel 10 is shortened, the protrusion 5 disposed at a position that avoids the axial direction of the screw is formed on the lens barrel 10. Line contact with the outer peripheral surface. For this reason, as in the first embodiment, the lens barrel 10 is stably held by the protrusions 5.

(Deformation)
As described above, various modifications and changes can be made without being limited to the embodiment described above, and these are also within the scope of the present invention.
In the present embodiment, the distance between two points on the inner peripheral surface of the annular body 2 is adjusted by the screw member 4 </ b> A that narrows the eccentric pin 4 or the slot portion 24. However, the present invention is not limited to this, and a groove may be provided on the outer peripheral surface of the annular body so that the inner wall in the depth direction of the groove is inclined. Then, by providing a screw having a rotating shaft directed from the outside to the inside of the annular body and moving the tip of the screw along the inner wall of the inclined groove, the distance between the two points on the inner peripheral surface of the annular body is gradually increased. Can be adjusted to be shorter.
In the present embodiment, flocked paper is provided as a protective member. However, the present invention is not limited to this, and the protective member may be a member that is flexible and has good sliding properties. For example, a resin film may be used.

  1, 1A, 1B, 1C, 1D: lens barrel mounting device, 2, 2A: annular body, 3: seat body, 4, 4A: adjustment member, 5, 5C: protrusion, 7: pressing member, 51: plane portion

Claims (10)

An annular body having a substantially annular inner peripheral surface through which the lens barrel can be inserted;
An adjusting member for adjusting the distance between two points on the inner peripheral surface of the annular body;
Two or more projections provided at a position avoiding an adjustment direction connecting the two points whose distance is adjusted by the adjustment member on the inner circumferential surface and projecting toward the inner side of the inner circumferential surface; Preparing,
A lens barrel mounting device. An annular body having a substantially annular inner peripheral surface through which the lens barrel can be inserted;
Three or more protrusions provided on the inner peripheral surface of the annular body and protruding toward the inner side of the inner peripheral surface;
A lens barrel mounting device. An adjusting member for adjusting a distance between two points on the inner peripheral surface of the annular body;
The protrusion is provided at a position avoiding an adjustment direction connecting the two points whose distance is adjusted by the adjustment member;
The lens barrel mounting device according to claim 2. The adjustment direction is a diameter direction of the inner peripheral surface;
The lens barrel mounting device according to claim 1 or 3, characterized in that: The protrusion is disposed at a position of approximately 45 degrees with respect to the adjustment direction;
The lens barrel mounting device according to claim 4. 4 or more of the protrusions are provided,
The lens barrel mounting device according to claim 1, wherein: The protrusions are arranged at an equal distance from each other;
The lens barrel mounting device according to any one of claims 1 to 6, wherein: The protrusion is provided continuously along the inner peripheral surface;
The lens barrel mounting device according to any one of claims 2 to 7, wherein: A pressing member that penetrates in the thickness direction from the outer side to the inner side of the annular body and protrudes from the inner peripheral surface, and presses and fixes the outer peripheral surface of the lens barrel to the inner peripheral surface;
The lens barrel mounting device according to any one of claims 2 to 8, wherein: The protrusion has a substantially trapezoidal shape in a side view, and includes a flat portion that can be in line contact with the outer peripheral surface of the lens barrel;
The lens barrel mounting device according to any one of claims 1 to 9, wherein:

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