JP2019105688A - Insertion apparatus, lens apparatus and imaging apparatus - Google Patents

Abstract

To provide an insertion apparatus that is advantageous for miniaturization, for example.SOLUTION: An insertion apparatus that selectively inserts an optical member on an optical path according to the present invention comprises: a first mechanism that includes a first rotary member being able to rotate around a center of a first axis holding a plurality of optical members and that selectively inserts one of the plurality of optical members into the optical path by means of the rotation; and a second mechanism that is arranged being apart from the first mechanism along the optical path, that includes a second rotary member being able to rotate around a center of a second axis holding a second optical member and that selectively inserts the second optical member into the optical path, and the first mechanism and the second mechanism are constituted such that, when they are projected on a surface along the optical path, a second trajectory defined as the trajectory of the second mechanism is accommodated in a first trajectory defined as the trajectory of the first mechanism in the surface.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an insertion device in a lens device or the like.

  In Patent Document 1, a plurality of optical filters (optical members) are held, and one of the plurality of optical filters is selectively rotated by the rotation by rotating around a first axis disposed outside the optical path. A filter insertion device (switching device) comprising: a filter holding member (rotating member) inserted into the light path; and a lever for rotating the filter holding member by rotating around the second axis disposed outside the light path. It is disclosed. One of the optical members is selectively inserted into the light path by the rotation.

JP, 2010-61002, A

  In the filter insertion device disclosed in Patent Document 1, although the first axis and the second axis are disposed at places other than the optical path, the size of the device may be increased depending on the disposition.

  The present invention aims to provide, for example, an insertion device that is advantageous for miniaturization.

  In order to achieve the above object, an insertion device for selectively inserting the optical member of the present invention into the optical path comprises a first rotating member rotatable about a first axis, holding a plurality of optical members. A first mechanism for selectively inserting one of the plurality of optical members into the optical path by the rotation, and a second optical member disposed apart from the first mechanism along the optical path And a second mechanism for selectively inserting the second optical member into the light path, the second mechanism including a second rotation member rotatable about a second axis, the second mechanism holding the second mechanism; And the second mechanism is a second locus as the locus of the second mechanism on the first locus as the locus of the first mechanism in the plane when they are projected onto the surface along the optical path Are configured to fit within.

  According to the present invention, it is possible to provide, for example, an insertion device that is advantageous for miniaturization.

It is a whole perspective view of a filter switching device concerning an example of the present invention. It is a sectional view of a filter switching device concerning an example of the present invention. It is a front view of a turret unit concerning an example of the present invention. It is a front view of the insertion / extraction unit based on the Example of this invention. It is a positional relationship figure of the turret unit and the insertion / extraction unit which concern on the Example of this invention. It is a positional-relationship sectional view of a turret unit and an insertion and removal unit concerning an example of the present invention. It is a partial disassembled perspective view of a filter switching device concerning an example of the present invention. It is a conceptual diagram of the insertion / extraction unit arrange | positioned to the rotating shaft A which concerns on the Example of this invention. It is a conceptual diagram of the insertion / extraction unit arrange | positioned to the rotating shaft B which concerns on the Example of this invention. It is a conceptual diagram of the insertion / extraction unit arrange | positioned to the rotating shaft C which concerns on the Example of this invention. It is a conceptual diagram of a lens apparatus and an imaging device which have a filter switching device of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.
The description will be made focusing on the parts related to the present invention, and parts not directly related to the present invention will be omitted. Hereinafter, with reference to FIGS. 1 to 10, an insertion device (switching device) according to an embodiment of the present invention will be described.

  FIG. 1 is an overall perspective view showing the appearance of a filter switching device (loading device) 1 of the present invention applied to a lens device. The turret unit 2 and the insertion / removal unit 3 are mounted on the fixing member 10, and the turret unit 2 is provided with a first position detection means 16.

  FIG. 2 is a cross-sectional view of the filter switching device 1 in the present invention. The turret unit (first mechanism) 2 is disposed on the left side and the insertion / extraction unit (second mechanism) 3 is disposed on the right side, with the base 11 held by the fixing member 10 interposed therebetween.

  FIG. 3 is a front view of the turret unit 2. The base 11 is provided with a first rotation shaft (first shaft, support member) 111 for rotatably supporting the turret (first rotation member) 12, and the opening of the turret 12 is provided with a first optical of different types. The filter (optical member) 13a is held by adhesion. Examples of different types of first optical filters 13a include, for example, an ND filter, a color filter, and the like. The turret 12 is provided with two projections 121. When the projections 121 pass through the first position detecting means 16, the rotational position of the turret 12 can be accurately detected. A motor (drive unit) 15 and a gear are provided at the end of the shaft of the motor 15 at the top of the turret unit 2. By engaging with an outer peripheral gear provided at the outer peripheral portion of the turret 12, a driving force of the motor 15 is obtained. It is transmitted to the turret 12 via a gear. The plurality of first optical filters 13a can be selectively moved on the light path by rotating the turret 12 and stopping it at a predetermined position.

  FIG. 4 is a front view of the insertion and removal unit 3. The insertion and removal unit 3 is disposed in parallel in the direction of the turret unit 2 and the first rotation shaft 111 on the back surface of the front view of the turret unit shown in FIG. The base 11 is provided with a second rotation shaft (second shaft, support member) 112 for rotatably supporting the filter holding member (second rotation member) 21, and the opening of the filter holding member 21 is provided with a second rotation shaft. The optical filter (second optical member) 13 b is held by adhesion. The second position detection means 24 mounted on the cable (not shown) is held by the fixing member 10, and the filter holding member 21 passes through the second position detection means 24 so that the filter holding member 21 is It is possible to detect the rotational position.

  A switching lever 22 rotatably supported by a third rotation shaft 113 provided on the base 11 is disposed below the insertion / removal unit 3 and slidably engaged with a connection groove 212 provided on the filter holding member 21. doing. Further, a spring (elastic member) 23 rotatably supported by a fourth rotation shaft 114 provided on the base 11 is disposed on the lower surface of the filter holding member 21, and an engagement provided on the filter holding member 21 is provided. It is engaged with the part 213. Thereby, the elastic force by the spring 23 acts between the fourth rotation shaft 114 and the engagement portion 213. When the user manually operates the switching lever 22, the filter holding that has been biased to the mechanical ends (stops) 115 a and 115 b by the engaging portion 213 of the filter holding member 21 and the spring 23 attached to the fourth rotating shaft 114 The member 21 rotates about the third rotation axis 113. At the same time, the rotation operation of the filter holding member 21 is performed, and the insertion and extraction operation with respect to the light path of the second optical filter 13b becomes possible. That is, at the position where the second optical filter 13b is inserted into the optical path (the state of FIGS. 4 and 6) by the elastic force of the spring 23, it is biased to one mechanical end 115a and the second optical filter 13b is removed from the optical path In the second position, the other mechanical end 115b is biased.

  5 and 6 are a positional relationship diagram and a positional relationship cross-sectional view of the turret unit 2 and the inserting and removing unit 3, respectively. The diameter of the turret 12 is determined by the gear specification, the luminous flux size, the holding surface for adhesively holding the filter, and the like to be the necessary minimum size. On the other hand, the movable range (second locus) in a plane perpendicular to the first rotation axis 111 of the filter holding member 21 is within the diameter of the turret 12, that is, within the movable range (first locus) 5. The filter switching device 1 can be miniaturized. In other words, when the turret unit 2 and the filter holding member 21 are projected onto the surface along the optical path, the first locus as the locus of the turret unit 2 in the plane is the locus of the filter holding member 21 It is comprised so that the 2nd locus of may be settled.

  5 and 6 show a state in which the first rotation shaft 111 and the second rotation shaft 112 are coaxially arranged, this is merely an example for downsizing, and the movable range 5 of the filter holding member 21 is As long as it is within the movable range 5 of the turret 12, it is not the case.

  In the filter switching device of the present invention, when the second optical filter 13b is positioned in the optical path, the distance between the first rotation axis 111 and the point closest to the first rotation axis 111 of the second optical filter 13b is rectangular. It is arranged to be longer than a half value of the length in the longitudinal direction of the optical filter 13b. Further, the second rotation shaft 112 is positioned on a line segment connecting the first rotation shaft 111 and a point on the first rotation shaft side by a half value from a point closest to the first rotation shaft 111 of the second optical filter 13b. It is arranged as. With this configuration, the filter switching device can be miniaturized, and an increase in the rotation angle of the filter holding member required for the insertion and removal operation of the second optical filter 13b into the light path can be suppressed.

  It is a partial disassembled perspective view of the filter switching device 1 of FIG. 7, and an assembly procedure is demonstrated in FIG. As a preparation, the second optical filter 13 b is adhered to the turret 12 and the filter holding member 21. After completing the preparation, the turret unit 2 is assembled. The motor 15 is attached to the base 11, and the turret 12 in which the first optical filter 13a is adhesively held on the first rotation shaft 111 provided on the base 11 is inserted. On top of that, it is attached to the cover member 14 attached with the first position detection means 16 mounted on the cable of the non-shown. Next, the insertion and removal unit 3 is assembled. The filter holding member 21 in which the second optical filter 13b is adhesively held is inserted into the second rotation shaft 112 provided on the back surface of the base 11 to which the turret unit 2 is attached. The switching lever 22 is attached to the third rotary shaft 113 provided on the base 11 and the connection groove 212 provided on the filter holding member 21, and the fourth rotary shaft 114 provided on the base 11 is provided on the filter holding member 21. The spring 23 is attached to the engaging portion 213. Finally, by attaching the parts assembled up to this point to the fixing member 10, the filter switching device 1 is completed. 8 to 10 are conceptual diagrams of the insertion / removal unit 3 when the arrangement of the second rotation shaft 112 is changed.

  FIG. 8 is a conceptual view in the case where the first rotation shaft 111 and the second rotation shaft 112 are coaxial. When the second rotation shaft 112 is arranged as shown in FIG. 8, the movable range 5 of the insertion / extraction unit 3 falls within the diameter of the turret 12, that is, within the movable range 5 of the turret 12, and the movable angle of the filter holding member 21 is optimally set. It is possible to

  FIG. 9 is a conceptual diagram in the case where the first rotation shaft 111 and the second rotation shaft 112 are non-coaxial and the second rotation shaft 112 is closer to the second optical filter 13 b than the first rotation shaft 111. Under this condition, the movable range 5 of the insertion and removal unit 3 falls within the diameter of the turret 12, that is, within the movable range 5 of the turret unit 2. However, in order to move the filter holding member 21 to a position retracted from the light path, a large movable angle of the filter holding member 21 is required, and the degree of freedom in design is reduced.

  FIG. 10 shows the concept in the case where the first rotation shaft 111 and the second rotation shaft 112 are non-coaxial and the second rotation shaft 112 is disposed at a distance from the second optical filter 13 b relative to the first rotation shaft 111. FIG. In this condition, the movable angle of the filter holding member 21 can be set to an appropriate angle in this condition. However, the movable range 5 of the insertion / extraction unit 3 expands outside the diameter of the turret 12, that is, outside the movable range 5 of the turret 12, and the filter switching device 1 becomes large.

  As described above, according to the present invention, the filter switching device 1 can be miniaturized by optimizing the rotation center of the filter holding member 21.

  FIG. 11 is a conceptual view of a lens device having the filter switching device 1 of the present invention and an imaging device. By providing the filter switching device 1 of the present invention in the lens device 300, it is possible to realize the lens device 300 that achieves the effects of the present invention. Furthermore, the imaging apparatus 500 of the present invention is configured by configuring a lens apparatus 300 including the filter apparatus 1 of the present invention and a camera apparatus 400 having an imaging element 450 that receives the optical image formed by the lens apparatus 300. It is possible to realize an imaging device that enjoys the effect of the filter device.

Reference Signs List 1 filter switching device 2 turret unit 3 insertion / extraction unit 4 optical path 5 movable range 10 fixing member 111 first rotary shaft 112 second rotary shaft 12 turret 13 a first optical filter 13 b second optical filter 15 motor (driving means)
21 Filter holding parts

Claims (9)

An insertion device for selectively inserting an optical member into an optical path, comprising:
A first rotation member holding a plurality of optical members and rotatable about a first axis, wherein one of the plurality of optical members is selectively inserted into the light path by the rotation; 1 mechanism,
A second rotating member, disposed about the second axis, spaced apart from the first mechanism along the optical path and holding a second optical member, the second rotating member being selectively rotatable A second mechanism to be inserted into the light path;
Have
When the first mechanism and the second mechanism are projected onto a surface along the optical path, the first trajectory as the trajectory of the first mechanism and the trajectory of the second mechanism on the surface Configured so that the second trajectory of
An insertion device characterized by   The insertion device according to claim 1, further comprising a drive unit configured to rotate the first rotation member.   The insertion device according to claim 1, further comprising a support member configured to support the first mechanism and the second mechanism. In said plane,
The distance between the point closest to the first axis of the second optical member and the first axis is longer than the half value of the length in the longitudinal direction of the second optical member,
The second axis is disposed on a line segment connecting the point from the first axis by the half value from the point and the first axis,
The insertion device according to any one of claims 1 to 3, characterized in that.   The insertion device according to any one of claims 1 to 4, wherein in the plane, the first axis and the second axis overlap each other.   The insertion device according to any one of claims 1 to 5, wherein the second mechanism includes a lever for rotating the second rotation member.   The second mechanism biases the second rotary member to the stopper in a state in which the second optical member is inserted into the light path, and the second optical member is not inserted into the light path. The insertion device according to any one of claims 1 to 6, further comprising an elastic member which biases the second rotating member to a stopper in a state. The insertion device according to any one of claims 1 to 7, wherein the optical member is selectively inserted into the light path;
A lens disposed on the light path;
A lens apparatus characterized by having: A lens apparatus according to claim 8;
An imaging element for receiving an image formed by the lens device;
An imaging apparatus characterized by having:

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