JP2012185374A - Diaphragm device, camera, and electronic instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a filter switching mechanism in a saved space and to realize a reduction in drive force required for switching optical filters and an increase in the speed of the switching operation.SOLUTION: A gear part 55 of an arm member 51 rotated integrally with a magnet 50 is engaged with a gear part 62 of a lever member 61. Also, an actuation pin 65 of the lever member 61 is fitted in a long hole 67 of a filter support member 28. While this fitted state is maintained, the filter support member 28 is moved in a direction X by the rotation of the lever member 61, thereby switching arrangement of optical filters 26 and 27. In addition, with respect to an imaginary reference axis J5 orthogonal to the rotation central axis of the lever member 61 and parallel to the moving direction X of the filter support member 28, the position of the moving final end of the actuation pin 65 of the lever member 61 is set in a position displaced in one direction from the imaginary reference axis J5 and in a position where its rotation angle range θ3 is less than 180 degrees.

Description

  The present invention relates to a diaphragm device that adjusts the amount of incident light, and a camera and electronic apparatus including the diaphragm device.

  Various cameras including a monitoring camera incorporate a diaphragm device that adjusts the amount of light incident from the outside (hereinafter referred to as “incident light amount”). The diaphragm device adjusts (optimizes) the amount of incident light by changing the size of a diaphragm aperture present on the optical path of incident light. As a mechanism of the diaphragm device, there is one that adjusts the light amount by moving the diaphragm member. Specifically, a member using a pair of diaphragm blades is known as an example of the diaphragm member (see, for example, Patent Document 1).

  In addition, an imaging device capable of color photography is incorporated in a day and night surveillance camera. In this type of surveillance camera, the shooting mode is switched between when the subject is bright and when the subject is dark. Specifically, the shooting mode is switched so that the color shooting mode is applied when shooting when the subject is bright, such as daytime, and the monochrome shooting mode is applied when shooting when the subject is dark, such as at night.

  Some of the monitoring cameras described above have a function of switching an optical filter in addition to a function of switching a shooting mode (see, for example, Patent Documents 1 and 2). Specifically, in the color photographing mode, the image is taken through the infrared cut filter, and in the monochrome photographing mode, the image is taken without the infrared cut filter or through another optical filter. For this reason, when photographing in the color photographing mode, light incident from the outside reaches the image sensor through the infrared cut filter. When shooting in the monochrome imaging mode, light incident from the outside reaches the imaging device without passing through the infrared cut filter or through the other optical filter.

  As a mechanism for switching the arrangement of optical filters (hereinafter referred to as “filter switching mechanism”), for example, in Patent Document 2, an optical filter is supported by a filter support member, and this filter support member is moved, thereby allowing an incident optical path to move. In contrast, a technique for advancing and retracting an optical filter is disclosed. The incident optical path described here refers to the path of light entering through the aperture.

  Further, in the above-described Patent Document 1, a technique is disclosed in which two optical filters are mounted side by side on a common filter support member, and the filter support member is moved and switched in the alignment direction of the optical filters. Specifically, a long hole is formed in the filter support member, and the distal end portion of the rotating arm that rotates by receiving the driving force of the drive unit is connected to the long hole of the filter support member. Then, by converting the rotation operation of the rotary arm into the movement operation of the filter support member, the two optical filters are moved together with the filter support member.

JP 2003-348398 A JP 2007-17594 A

  However, the technique described in Patent Document 1 (hereinafter referred to as “first conventional technique”) and the technique described in Patent Document 2 (hereinafter referred to as “second conventional technique”) are as follows. There was a problem to be solved.

  That is, in the first prior art, for the purpose of avoiding interference between the filter support member and the filter switching mechanism, a filter switching mechanism is provided apart from the filter support member, and the arm portion of the rotating arm is extended therefrom. It connects with the long hole of a filter support member. For this reason, in order to ensure the amount of movement of the filter support member required for switching the optical filter, it is necessary to sufficiently increase the length of the rotating arm. Therefore, it is necessary to secure a wide space for rotating the rotary arm.

  On the other hand, the second prior art has the following problems to be solved. That is, in general, an optical filter used for a camera or the like is configured using a glass substrate or the like. For this reason, the mass of the optical filter is larger than that of a resin molded product or the like. Therefore, for example, when the two optical filters are attached to the common filter support member and moved as in the first prior art, the driving force required for the movement is increased, and the high-speed operation ( (Lightness) is impaired.

  The main object of the present invention is to realize a filter switching mechanism in a space-saving manner in an aperture device having an optical filter switching function, and also to reduce the driving force required for switching the optical filter and to increase the switching operation speed. There is to do.

The first aspect of the present invention is:
A diaphragm member that forms a diaphragm aperture through which incident light passes;
A first rotating member;
A second rotating member that rotates according to a rotation angle and a rotation direction of the first rotating member, and has an operating pin at a position separated from the rotation center axis of the first rotating member;
Rotation transmitting means for transmitting a rotational force from the first rotating member to the second rotating member and rotating the second rotating member at a larger angle than the first rotating member by transmitting the rotational force. When,
Two optical filters,
A filter support member that supports the two optical filters side by side and has a long hole that fits into the operating pin;
A base member that movably supports the filter support member in a uniaxial direction;
The second rotating member is configured using the first rotating member, the second rotating member, and the rotation transmitting means, and maintains the fitted state of the operating pin and the elongated hole. The filter support member is moved by the rotation of the first optical filter, and a first arrangement state in which one of the two optical filters is arranged on the incident optical path and a second arrangement in which the other optical filter is arranged on the incident optical path. Filter switching means for switching the arrangement state of the optical filter with respect to the incident optical path by reciprocating the filter support member between the arrangement state; and
With
The two optical filters are in the first arrangement state and the second arrangement with respect to a virtual reference axis that is orthogonal to the rotation center axis of the second rotation member and parallel to the moving direction of the filter support member. The position of the operating pin of the second rotating member when in the state is a position shifted to one side from the virtual reference axis, and the rotation angle range of the second rotating member is less than 180 degrees The aperture device is characterized by being set at a position.

According to a second aspect of the present invention, in the diaphragm device according to the first aspect,
The filter switching means includes a magnet that rotates integrally with the first rotating member, and a magnetic body that is provided to face the outer peripheral surface of the magnet, and is half the rotation angle necessary for switching the optical filter. The positional relationship between the magnet and the magnetic body is set so that the magnetic attractive forces acting between the magnetic poles of the magnet and the magnetic body are equal to each other when the magnet is rotated up to It is characterized by.

According to a third aspect of the present invention, in the diaphragm apparatus according to the first aspect,
The two optical filters are supported by the filter support member, one optical filter is an infrared cut filter, and the other optical filter is a dummy filter.

The fourth aspect of the present invention is:
The aperture stop device according to any one of the first to third aspects;
A photoelectric conversion element that converts light incident through the aperture opening into an electrical signal;
It is a camera characterized by providing.

According to a fifth aspect of the present invention,
A camera according to the fourth aspect;
An image processing unit for processing an image signal output from the camera;
It is an electronic device characterized by including.

  According to the present invention, in an aperture device having an optical filter switching function, a filter switching mechanism is realized in a space-saving manner, and at the same time, a driving force required for switching an optical filter is reduced and a switching operation is speeded up. Can do.

It is a figure which shows the structural example of the camera to which this invention is applied. It is a perspective view which shows the example of a whole structure of the aperture_diaphragm | restriction apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which shows the example of a whole structure of the aperture_diaphragm | restriction apparatus which concerns on embodiment of this invention. It is a perspective view (the 1) which shows the state which attached a pair of aperture blade and the aperture drive part to the aperture substrate. It is a perspective view (the 2) which shows the state which attached a pair of aperture blade and the aperture drive part to the aperture substrate. It is a disassembled perspective view which shows the structure of a filter unit. It is a disassembled perspective view which shows the structure of a filter drive part. It is a schematic diagram explaining the relative positional relationship of each component part of a filter drive part. It is a perspective view (the 1) which shows the state which attached the filter unit and the filter drive part to the aperture_diaphragm | restriction board | substrate. It is a figure explaining rotation operation of a magnet. It is a perspective view (the 2) which shows the state which attached the filter unit and the filter drive part to the aperture_diaphragm | restriction board | substrate. It is a figure explaining the relationship between the movement operation | movement of a filter unit, and the rotation operation | movement of a filter operation part and a lever member.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the camera will be described.
1A and 1B show an example of the configuration of a camera to which the present invention is applied. FIG. 1A is an external view of the entire camera, and FIG. The illustrated camera 100 is, for example, a surveillance camera installed on a ceiling portion (or a wall or the like) of a building for crime prevention purposes. The camera 100 includes a mounting base 101 and a camera body 102. The mounting base 101 is structured to be fixed to a ceiling portion of a building by screwing, for example.

  The camera body 102 includes a lens barrel portion 103 and an objective lens 104. An optical system including the objective lens 104 is incorporated in the lens barrel portion 103. The objective lens 104 is attached to the tip of the lens barrel 103. The camera body 102 incorporates the diaphragm device 1 and the image sensor 105 as one functional part of the optical system. The diaphragm device 1 will be described in detail later.

  The image sensor 105 is an image sensor that can perform color photography, and is configured by, for example, a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like. The imaging element 105 has an imaging surface formed by arranging a plurality of (many) pixels in a matrix, for example. The imaging element 105 is incorporated as an example of a photoelectric conversion element that converts light incident on the imaging surface through the aperture opening of the aperture stop device 1 into an electrical signal.

  In addition, this invention is applicable not only to the camera 100 illustrated here but the camera of the other structure provided with the aperture_diaphragm | restriction apparatus 1. FIG. In addition, various changes can be made to the configuration of the optical system, such as the type, number, and arrangement of lenses and the arrangement of the diaphragm 1.

Next, the configuration of the diaphragm device will be described.
(overall structure)
FIG. 2 is a perspective view showing an example of the overall configuration of the diaphragm device according to the embodiment of the present invention, and FIG. 3 is an exploded perspective view thereof. The illustrated diaphragm device 1 generally includes a diaphragm substrate 2, a pair (two) of diaphragm blades 3, 4, a filter unit 5, a diaphragm driving unit 6, and a filter driving unit 7. It has become.

  The diaphragm substrate 2 is provided as an example of a base member. On the diaphragm substrate 2, the respective constituent members constituting the diaphragm device 1 are mounted. The pair of diaphragm blades 3 and 4 are provided as an example of a diaphragm member that forms a diaphragm aperture through which incident light passes. The pair of diaphragm blades 3 and 4 form a diaphragm aperture (described later) in a state where they overlap each other. The aperture opening is an opening that is located on the optical path (incident optical path) of light incident on the camera and limits the amount of light passing therethrough. For this reason, when the size of the aperture is relatively large, the amount of light passing therethrough (incident light quantity) is relatively increased, and when the size of the aperture is relatively small, the light passing therethrough The amount of is relatively reduced. The filter unit 5 has an optical filter function with respect to incident light.

  The diaphragm driving unit 6 relatively moves the pair of diaphragm blades 3 and 4 in order to adjust the size of the diaphragm opening. The filter driving unit 7 operates the filter unit 5 in order to switch the arrangement state of an optical filter (described later) with respect to the incident optical path.

(Diaphragm substrate)
The diaphragm substrate 2 is made of, for example, resin. The aperture substrate 2 mainly has three substrate portions 11, 12, and 13 integrally. The substrate portion 11 is a portion to which the pair of diaphragm blades 3 and 4 and the filter unit 5 are attached. The substrate portion 12 is a portion on which the diaphragm driving unit 6 is mounted, and the substrate portion 13 is a portion on which the filter driving unit 7 is mounted. Among these, an opening 14 is integrally formed in the substrate portion 11. Also. The substrate portion 12 is integrally formed with a recess 15, and the substrate portion 13 is integrally formed with a recess 16.

(Aperture blade)
The pair of aperture blades 3 and 4 is configured by using, for example, a plate-shaped material made of polyethylene terephthalate (PET) covered with a carbon film. Each of the diaphragm blades 3 and 4 is formed in a thin plate shape as a whole.

  One aperture blade 3 is provided with one hole 17, three guide grooves 18 a, 18 b, 18 c, and one engagement hole 19. The hole portion 17 has a perfect circular shape or a circular shape close thereto, and has a planar shape in which a part of the circular shape is cut into a V shape. An ND (Neutral Density) filter 20 is attached to a part of the hole 17 (a V-shaped notch). The three guide grooves 18 a, 18 b, 18 c are formed in parallel with each other along the longitudinal direction of the diaphragm blade 3. Of the three guide grooves 18a, 18b, 18c, the two guide grooves 18b, 18c are formed on the same straight line. The remaining one guide groove 18a is formed on the opposite edge of the hole 17 with respect to the two guide grooves 18b and 18c. The engagement hole 19 is formed on an extension line of the two guide grooves 18b and 18c. Further, the engagement hole 19 is formed in a long hole shape in plan view along the short direction of the aperture blade 3.

  The other aperture blade 4 is provided with one hole portion 21, three guide grooves 22 a, 22 b, 22 c and one engagement hole 23. The hole 21 is a perfect circle or a circular shape close thereto, and has a planar shape in which a part of the circular shape is cut into a V shape. An ND filter 24 is attached to a part of the hole portion 21 (V-shaped cutout portion). The hole 21 forms an aperture opening by overlapping with the hole 17 described above. The three guide grooves 22 a, 22 b, and 22 c are formed in parallel to each other along the longitudinal direction of the diaphragm blade 4. Of the three guide grooves 22a, 22b, and 22c, the two guide grooves 22a and 22b are formed on the same straight line. The remaining guide groove 22c is formed on the opposite edge of the hole 21 with respect to the two guide grooves 22a and 22b. The engagement hole 23 is formed on an extension line of the two guide grooves 22a and 22b. The engagement hole 23 is formed in a long hole shape in plan view along the short direction of the diaphragm blade 4.

(Filter unit)
The filter unit 5 includes two optical filters 26 and 27, a filter support member 28 that supports the two optical filters 26 and 27 side by side, and the optical filters 26 and 27 are fastened to the filter support member 28. It is comprised using the fastener 29 to attach.

  The two optical filters 26 and 27 are constituted by, for example, the following filters. That is, one optical filter 26 is constituted by an infrared cut filter, and the other optical filter 27 is constituted by a dummy filter. The infrared cut filter is, for example, an optical filter having a characteristic of blocking the passage of infrared rays by absorbing infrared rays. The dummy filter is an optical filter having a characteristic of transmitting at least infrared rays. The optical filters 26 and 27 are both configured based on a transparent glass substrate. The glass substrates constituting the optical filters 26 and 27 have the same refractive index of light. As a specific structural difference, for example, a film that transmits visible light and absorbs infrared light is formed on the main surface of a glass substrate that constitutes one optical filter 26, and the other optical filter 27. The film is not formed on the main surface of the glass substrate.

  The reason why the infrared cut filter and the dummy filter are provided in the filter unit 5 is that when the arrangement state of the optical filter is switched, the focal length (the distance from the main point of the optical system to the focal point) does not shift before and after the switching. It is for doing so. More specifically, when there is no dummy filter, the focal length is shifted due to the difference in the refractive index of light passing through the infrared cut filter in a state where the infrared cut filter is disposed on the incident optical path. On the other hand, if the dummy filter is arranged on the incident optical path in the form of replacing the infrared cut filter, the focal length shift due to the difference in the refractive index of light is eliminated. For the above reason, the filter unit 5 is provided with a dummy filter. However, the reason for providing the two optical filters 26 and 27 may be other reasons.

(Aperture drive unit)
The diaphragm driving unit 6 is configured by using a diaphragm operating unit 31, a bobbin assembly 32, a yoke 33, a relay substrate 34, a magnetic body (not shown), and a coil (not shown).

  The aperture operation unit 31 includes a magnet (permanent magnet) 35 and an arm member 36. The magnet 35 is formed in a cylindrical shape. The magnet 35 is magnetized with one half-moon part of the circular cross section as the N pole side and the other half moon part as the S pole side. A shaft hole (not shown) is formed in the central axis of the magnet 35 along the central axis, and the shaft 37 of the arm member 36 is inserted into the shaft hole.

  The arm member 36 is obtained by integral molding of resin, for example. In addition to the shaft 37 described above, the arm member 36 integrally includes a base 38 and arm portions 39a and 39b. The base 38 is formed in a plate shape having a shape corresponding to the outer shape of the magnet 35. The shaft 37 described above is formed in a state of standing vertically from the center of the base portion 38. The arm portions 39a and 39b are formed so as to extend from the base portion 38 to one side and the other side. The arm member 36 is fixed to the magnet 35 using an adhesive or the like, for example. As a result, the magnet 35 and the arm member 36 are integrally rotated about the shaft 37. The pair of arm portions 39a and 39b are each formed in a crank shape. A claw portion 40a is formed at the distal end portion of one arm portion 39a, and a claw portion 40b is also formed at the distal end portion of the other arm portion 39b.

  The bobbin assembly 32 accommodates the magnet 35 and a part of the arm member 36 (mainly the base 38) of the above-described diaphragm operating unit 31, and is formed using an insulating material such as resin. In a state where the throttle operating portion 31 is incorporated in the bobbin assembly 32, the throttle operating portion 31 is supported rotatably about the shaft 37. The magnetic body (not shown) described above is attached to the bobbin assembly 32, and the coil (not shown) described above is wound around the bobbin assembly 32.

  The yoke 33 suppresses leakage of magnetic field lines to the outside. The yoke 33 is formed in a cylindrical shape. The yoke 33 accommodates the bobbin assembly 32 in a state in which the above-described throttle operating unit 31, magnetic body (not shown), and coil (not shown) are assembled.

  The relay board 34 electrically connects a coil (not shown) wound around the bobbin assembly 32 and a diaphragm control unit (not shown). The aperture control unit rotates the aperture operation unit 31 by energizing a coil wound around the bobbin assembly 32 when a predetermined condition is satisfied. The relay board 34 is configured by a circular printed wiring board corresponding to the diameter of the yoke 33. The relay board 34 includes a plurality of terminal portions 42 corresponding to a plurality (four in the illustrated example) of terminal pins 41 provided at one end of the bobbin assembly 32 and a plurality of terminals corresponding to the plurality of terminal portions 42. Part 43. A coil (not shown) wound around the bobbin assembly 32 is connected to a plurality of terminal pins 41, and each terminal pin 41 is connected to each terminal portion 42 of the relay board 34. The relay substrate 34 is disposed at one end of the yoke 33. In addition, corresponding lead wires (not shown) are connected to the respective terminal portions 43 of the relay substrate 34. The lead wire (not shown) electrically connects the relay substrate 34 and the aperture control unit (not shown).

(Filter drive unit)
The filter driving unit 7 includes a filter operating unit 46, a bobbin assembly 47, a yoke 48, a relay board 49, a coil (described later), and a magnetic body (described later). The filter driving unit 7 constitutes a filter switching unit together with a lever member 61 described later. The filter switching means is means for switching the arrangement state of the optical filter with respect to the optical path of the incident light passing through the aperture opening of the aperture member by moving the filter unit. Hereinafter, the configuration of the filter switching means will be described.

  The filter operation unit 46 includes a magnet (permanent magnet) 50 and an arm member 51. The magnet 50 is formed in a cylindrical shape. The magnet 50 is magnetized with one half-moon portion of the circular cross section as the N-pole side and the other half-moon portion as the S-pole side. A shaft hole (not shown) is formed in the central axis of the magnet 50 along the central axis, and the shaft 52 of the arm member 51 is inserted into the shaft hole.

  The arm member 51 is provided as an example of a first rotating member. The arm member 51 is obtained by integral molding of resin, for example. In addition to the shaft 52 described above, the arm member 51 integrally includes a base portion 53 and an arm portion 54. The base 53 is formed in a plate shape having a shape corresponding to the outer shape of the magnet 50. The shaft 52 described above is formed so as to stand vertically from the center of the base 53. The arm portion 54 is formed so as to extend from the base portion 53 to one side. The arm member 51 is fixed to the magnet 50 using, for example, an adhesive. As a result, the magnet 50 and the arm member 51 rotate integrally around the shaft 52. The arm portion 54 is formed in an L shape. A gear portion 55 is provided at the distal end portion of the arm portion 54. The gear portion 55 is formed in an arc shape having a center on a virtual axis coaxial with the shaft 52 of the arm member 51. In the polar coordinate system having the axis 52 as the center (coordinate origin), the gear unit 55 continuously arranges a plurality of teeth in an arc shape with an angle range of less than 90 degrees, specifically 60 degrees or an angle range close thereto. It has a structure.

  The bobbin assembly 47 accommodates the magnet 50 of the arm member 51 and a part (mainly the base 53) of the arm member 51 described above, and is formed using an insulating material such as a resin. In a state where the filter operating part 46 is incorporated in the bobbin assembly 47, the filter operating part 46 is supported so as to be rotatable about the shaft 52. The magnetic body (not shown) described above is attached to the bobbin assembly 47, and the coil (not shown) described above is wound around the bobbin assembly 47.

  The yoke 48 suppresses leakage of magnetic field lines to the outside. The yoke 48 is formed in a cylindrical shape. The yoke 48 accommodates the bobbin assembly 47 in a state in which the above-described filter operating portion 46, magnetic body (not shown), and coil (not shown) are assembled.

  The relay board 49 electrically connects a coil (not shown) wound around the bobbin assembly 47 and a filter control unit (not shown). The filter control unit rotates the filter operating unit 46 by energizing a coil wound around the bobbin assembly 47 when a predetermined condition is satisfied. The relay board 49 is formed of a circular printed wiring board corresponding to the diameter of the yoke 48. The relay board 49 includes a plurality of terminal portions 57 corresponding to a plurality of (four in the illustrated example) terminal pins 56 provided at one end of the bobbin assembly 47 and a plurality of terminals corresponding to the plurality of terminal portions 57. Part 58. Coils (not shown) wound around the bobbin assembly 47 are connected to a plurality of terminal pins 56, and each terminal pin 56 is connected to each terminal portion 57 of the relay board 49. The relay substrate 49 is disposed at one end of the yoke 48. In addition, corresponding lead wires (not shown) are connected to the respective terminal portions 58 of the relay substrate 49. The lead wire (not shown) electrically connects the relay board 49 and the filter control unit (not shown).

  Further, a lever member 61 is provided as a member belonging to the filter driving unit 7. The lever member 61 is provided as an example of a second rotating member. The lever member 61 is obtained by integral molding of resin, for example. The lever member 61 integrally includes a gear portion 62, a pivot portion 63, a lever portion 64, and an operation pin 65. The lever member 61 rotates with the central axis of the pivot 63 as its own rotation center axis.

  The gear portion 62 constitutes a gear transmission mechanism together with the gear portion 55 of the arm member 51 described above. This gear transmission mechanism is provided as an example of power transmission means. The gear portion 62 has a structure in which a plurality of teeth are continuously arranged in an arc shape with an angle range of 180 degrees or close thereto. The gear portion 62 meshes with the gear portion 55 described above and rotates together. At that time, power (hereinafter also referred to as “rotational force”) is transmitted from the gear portion 55 to the lever member 61 between the two gears. For this reason, the arm member 51 having the gear portion 55 serves as a rotation member on the main drive side, and the lever member 61 having the gear portion 62 serves as a rotation member on the driven side. Further, the lever member 61 rotates according to the rotation angle and the rotation direction of the arm member 51. The pitch circle diameter of the gear portion 62 is set shorter than the pitch circle diameter of the gear portion 55. For this reason, when the rotational force is transmitted at the meshing portion between the gear portion 55 and the gear portion 62, the rotation angle of the gear portion 62 is larger than the rotation angle of the gear portion 55. Therefore, the rotation angle is amplified between the gear portion 55 and the gear portion 62 together with the transmission of the rotational force.

  The gear portion 62 is formed in substantially the same plane as the lever portion 64. The gear portion 62 is formed in the vicinity of the base end portion of the lever portion 64. The pivot 63 is formed in a cylindrical shape having a hole 63a. The central axis of the pivot portion 63 coincides with the center of the pitch circle (tooth tip circle) of the gear portion 62. That is, the pivot portion 63 is formed concentrically with a pitch circle corresponding to the outer diameter of the gear portion 62. The lever part 64 is formed in a substantially triangular shape in plan view. The width dimension of the lever portion 64 continuously changes in the length direction of the lever portion 64 (portion from the base end portion of the lever portion 64 to the tip end portion), and the widest portion is closer to the base end portion of the lever portion 64. Is located. The pivot portion 63 described above is provided at the base end portion of the lever portion 64. The operating pin 65 is provided at the distal end portion of the lever portion 64. For this reason, the pivot part 63 and the operating pin 65 are arranged in a state of being separated by a distance corresponding to the length dimension of the lever part 64. Further, the operating pin 65 is provided at a position separated from the rotation center axis of the lever member 61 in the length direction of the lever portion 64. The pivot 63 protrudes in one thickness direction of the lever portion 64, and the operating pin 65 protrudes in the other thickness direction of the lever portion 64.

Next, the relationship between the diaphragm substrate 2, the pair of diaphragm blades 3 and 4, and the diaphragm driving unit 6 will be described.
FIG. 4 is a perspective view showing a state in which a pair of diaphragm blades and a diaphragm driving unit are attached to the diaphragm substrate. In FIG. 4, a pair of diaphragm blades 3 and 4 are attached to one surface side of the diaphragm substrate 2 so as to overlap each other, and the diaphragm is driven to the other surface side (recess 15 shown in FIG. 3) on the opposite side. Part 6 is attached. Each of the diaphragm blades 3 and 4 is attached to be movable (slidable) in one axis direction by a plurality of guide pins 66 provided on one surface side of the diaphragm substrate 2. A uniaxial direction refers to a direction parallel to one linear axis. Each guide pin 66 is fitted in the guide grooves 18a to 18c and 22a to 22c of the diaphragm blades 3 and 4 corresponding to the guide pins 66, respectively. The diaphragm blades 3 and 4 are stacked so as to face each other with an appropriate gap therebetween, and are movable in the longitudinal direction of the substrate portion 11 (X direction in the drawing). Further, the claw portion 40 b of the arm member 36 described above is inserted into the engagement hole 19 of the aperture blade 3, and the claw portion 40 a of the arm member 36 described above is inserted into the engagement hole 23 of the aperture blade 4.

Next, the diaphragm operation in the diaphragm device will be described.
The diaphragm operation refers to an operation of changing the size of the diaphragm aperture formed by the pair of diaphragm blades 3 and 4. In the present embodiment, as an example, a case will be described in which the size of the aperture opening is changed in two steps, large and small. However, the present invention is not limited to this. For example, a configuration may be adopted in which the size of the aperture opening is changed (adjusted) in multiple steps (stepless) by using a motor or the like as a drive source for the aperture operation. Good.

  First, the diaphragm drive unit 6 is driven to adjust the diaphragm aperture. Specifically, a magnetic field is formed by energizing a coil (not shown). If it does so, the aperture_diaphragm | restriction action part 31 will rotate to one side or the other according to the direction of the magnetic field formed by the electricity supply to a coil. When the diaphragm actuating unit 31 rotates by driving the diaphragm driving unit 6 in this way, the driving force is transmitted to the corresponding diaphragm blades 3 and 4 by the arm parts 39a and 39b of the arm member 36, respectively. For this reason, when the aperture operation unit 31 rotates, the pair of aperture blades 3 and 4 move in the X direction in conjunction with the rotation. However, the directions in which the pair of diaphragm blades 3 and 4 move are opposite to each other in the X direction. When the pair of diaphragm blades 3 and 4 move, the overlapping area of the hole 17 of the diaphragm blade 3 and the hole 21 of the diaphragm blade 4 changes accordingly. The area where the two holes 17 and 21 overlap defines the size of the aperture. For this reason, the size of the aperture opening can be changed by the movement of the pair of aperture blades 3, 4 accompanying the driving of the aperture drive unit 6.

  Incidentally, the state shown in FIG. 4 is a state in which the aperture blades 3 and 4 are moved so that the aperture opening is minimized by the large displacement of the holes 17 and 21 in the X direction. Further, the state shown in FIG. 5 is a state in which the aperture blades 3 and 4 are moved so that the aperture opening is maximized by just overlapping the holes 17 and 21.

Next, the configuration of the filter unit 5 will be described in detail.
FIG. 6 is an exploded perspective view showing the configuration of the filter unit. As illustrated, the filter support member 28 serving as the base of the filter unit 5 is provided with a long hole 67 and two circular holes 68 and 69. The filter support member 28 is obtained, for example, by integral molding of resin, and is formed in a substantially rectangular plate shape. The long hole 67 is formed at one end of the filter support member 28 in the longitudinal direction. Further, the long hole 67 is formed in parallel with the short side direction of the filter support member 28.

  The two holes 68 and 69 are formed side by side in the longitudinal direction of the filter support member 28. The optical filter 26 is attached to the filter support member 28 so as to close one hole 68, and the optical filter 27 is attached to the filter support member 28 so as to close the other hole 69. For this reason, the two optical filters 26 and 27 are attached side by side in the longitudinal direction of the filter support member 28, similarly to the corresponding holes 68 and 69. The fastener 29 is configured by, for example, a leaf spring having an appropriate spring property. The fastener 29 presses and fixes the optical filters 26 and 27 against the filter support member 28. The fastener 29 is attached to the filter support member 28 so as to simultaneously press the optical filters 26 and 27 attached to the filter support member 28.

Next, the configuration of the filter driving unit will be described in detail.
FIG. 7 is an exploded perspective view showing the configuration of the filter driving unit. As shown in the figure, the filter driving unit 7 includes a coil 71 and a magnetic body 72 in addition to the filter operating unit 46, the bobbin assembly 47, the yoke 48, and the relay substrate 49 described above. The coil 71 is wound around the bobbin assembly 47 in an annular winding form corresponding to the shape of the bobbin assembly 47. The coil 71 generates a magnetic field by causing a current to flow through it, thereby forming a magnetic field. The magnetic body 72 is attached to the bobbin assembly 47 by, for example, adhesion. The magnetic body 72 generates a magnetic attraction force between the magnetic pole (N pole or S pole) of the magnet 50 and holds the position of the filter unit 5 by this magnetic attraction force.

  FIG. 8 is a schematic diagram for explaining the relative positional relationship between the components of the filter driving unit. As illustrated, the magnet 50 is polarized into an N pole and an S pole. Here, two axes orthogonal to each other on the central axis of the magnet 50 are defined as an axis J1 and an axis J2. In such a case, the N pole and S pole of the magnet 50 are arranged on the same axis J1. The rotation angle range θ1 of the magnet 50 that rotates about the intersection of the axis line J1 and the axis line J2 is set to 60 degrees or close to the formation angle range of the gear portion 55 of the arm member 51 described above. . On the other hand, the magnetic body 72 is disposed on the axis J <b> 2 so as to face the outer peripheral surface of the magnet 50. The magnetic body 72 is arranged in a direction parallel to the axis J1 with the position of the axis J2 as the center.

  FIG. 8 shows a state in which the magnet 50 is in the middle of rotation and the rotation angle of the magnet 50 is just an intermediate (half) angle. In this state, the magnetic attraction force acting between the N pole of the magnet 50 and the magnetic body 72 and the magnetic attraction force acting between the S pole of the magnet 50 and the magnetic body 72 are equal to each other. This state is defined as a “magnetic equilibrium state”. In contrast, when a current is passed through the coil 71 described above, a magnetic field is formed in the direction of the arrow M1 in the figure, for example. Further, when the direction of the current flowing through the coil 71 is reversed from that state, a magnetic field is formed in the direction opposite to the arrow M1 in the drawing. Thus, the direction of the magnetic field formed by energizing the coil 71 is set to have, for example, an inclination angle θ2 of 40 degrees to 50 degrees with respect to the axis line J1, with reference to the axis line J1. The inclination angle θ2 is set so as to satisfy the condition “θ2> θ1 / 2” when defined in relation to the rotation angle range θ1 of the magnet 50 described above.

  Further, when the magnet 50 is rotated to one end in the rotation angle range θ1, the filter unit 5 is moved to one end by the rotation of the arm member 51 and the lever member 61 accompanying this rotation. On the other hand, when the magnet 50 is rotated to the other end in the rotation angle range θ1, the filter unit 5 is moved to the other end by the rotation of the arm member 51 and the lever member 61. At this time, the rotation angle range θ1 of the filter operating portion 46 including the magnet 50 and the arm member 51 is about 60 degrees, but the rotation angle range θ3 of the lever member 61 (see FIG. 12) is more than twice as large as θ1. It will be about 150 degrees.

  Further, while the filter unit 5 moves from one end to the other end, the operating pin 65 of the lever member 61 moves so as to reciprocate along the long hole 67 of the filter support member 28. Then, the rotation operation of the filter operation unit 46 and the lever member 61 and the movement operation of the filter unit 5 interlocked with the rotation operation are stopped by abutting the constituent members exemplified next. As the abutment between the constituent members, for example, a case where the operating pin 65 is abutted against one end portion of the long hole 67 or a case where the lever member 61 is abutted against a part of the diaphragm substrate 2 can be considered.

Next, the relationship between the diaphragm substrate, the filter unit, and the filter driving unit will be described.
FIG. 9 is a perspective view showing a state in which the filter unit and the filter driving unit are attached to the diaphragm substrate. In FIG. 9, the filter unit 5 is attached to one surface side of the diaphragm substrate 2, and the filter driving unit 7 is attached to the other surface side (recess 16 shown in FIG. 3) on the opposite side. The filter unit 5 is movable (slidable) in one axial direction (X direction in the drawing) by supporting both side edges of the filter support member 28 movably on the diaphragm substrate 2. The operating pin 65 of the lever member 61 described above is inserted into the long hole 67 of the filter support member 28. The operating pin 65 is movable in the long axis direction of the long hole 67. Further, the direction (long axis direction) of the long hole 67 is a direction parallel to the Y direction perpendicular to the moving direction (X direction) of the filter support member 28. The longitudinal dimension of the long hole 67 is such that the operation of the lever member 61 centered on the pivot 63 is rotated by less than 180 degrees when the operating pin 65 inserted therein reciprocates in the long axis direction of the long hole 67. It is set to a dimension that can be tolerated in the angular range.

  The lever member 61 is rotatably supported by the diaphragm substrate 2. Specifically, by fitting a hole 63a (see FIG. 3) of the pivot 63 into a pin portion 73 (see FIGS. 4 and 5) provided on the diaphragm substrate 2, the pivot 63 is centered. The lever member 61 is rotatably supported. Further, the gear portion 62 of the lever member 61 is engaged with the gear portion 55 of the arm member 51 described above. Therefore, power (rotational force) is transmitted between the arm member 51 and the lever member 61 by meshing of the gears.

Next, the relationship between the rotating operation of the magnet and the moving operation of the filter unit will be described.
First, the rotation operation of the magnet 50 will be described with reference to FIGS. FIGS. 10A and 10B assume a case where the filter driving unit 7 is viewed from the upper side (the side on which the filter driving unit 7 is mounted with respect to the diaphragm substrate 2).
The magnet 50 rotates according to the direction of the magnetic field by forming a magnetic field by energizing the coil 71 described above. Specifically, as shown in FIG. 10A, when a magnetic field is formed in the direction of the arrow M1, the magnet 50 rotates to one end by the magnetic repulsive force acting between the magnetic pole of this magnetic field and the magnetic pole of the magnet 50. To do. As shown in FIG. 10B, when a magnetic field is formed in the direction of the arrow M2, the magnet 50 is rotated to the other end by a magnetic attraction force acting between the magnetic pole of the magnetic field and the magnetic pole of the magnet 50.

  Further, when the magnet 50 is rotated as shown in FIG. 10A, the filter support member 28 of the filter unit 5 is moved to one end in the X direction as shown in FIG. In this case, one optical filter (the optical filter 26 in the illustrated example) is arranged on the optical path of the light that is to enter through the aperture opening (hereinafter referred to as “first arrangement state”). Further, as shown in FIG. 10A, the state of the filter drive unit 7 is greatly collapsed because the S pole of the magnet 50 is disposed closer to the magnetic body 72 than the N pole. Therefore, the magnet 50 is urged counterclockwise by the magnetic attractive force acting between the south pole and the magnetic body 72. And the filter unit 5 is hold | maintained in the state which stopped to the one end of the X direction by this urging | biasing force.

  On the other hand, when the magnet 50 is rotated as shown in FIG. 10B, the filter support member 28 of the filter unit 5 is moved to the other end in the X direction as shown in FIG. . In this case, the other optical filter (optical filter 27 in the illustrated example) is arranged on the incident optical path that enters through the aperture opening (hereinafter referred to as “second arrangement state”). In addition, as shown in FIG. 10B, the state of the filter drive unit 7 is greatly collapsed because the N pole of the magnet 50 is disposed closer to the magnetic body 72 than the S pole. Therefore, the magnet 50 is urged clockwise by the magnetic attractive force acting between the N pole and the magnetic body 72. And the filter unit 5 is hold | maintained in the state stopped and moved to the other end of the X direction by this biasing force.

Next, the rotation angle range of the lever member will be described.
FIG. 12A shows a state in which the filter unit has been moved to one moving end in the X direction, and FIG. 12B shows a state in which the filter unit has been moved to the other moving end in the X direction. Here, an axis connecting the rotation center axis of the lever member 61 and the center of the operating pin 65 in a state where the filter unit 5 is moved to one moving end is J3. Further, an axis connecting the rotation center axis of the lever member 61 and the center of the operating pin 65 in a state where the filter unit 5 is moved to the other moving end is defined as J4. In such a case, the angle formed by these axes J3 and J4 is determined when the filter unit 5 is moved from one moving end to the other moving end, or when the filter unit 5 is moved from the other moving end to one moving end. In addition, the maximum angle θ3 at which the lever member 61 rotates is obtained. The rotation angle range of the lever member 61 corresponds to this angle θ3. In the following description, the rotation angle range of the lever member 61 is described as “θ3”.

  The rotation angle range θ3 of the lever member 61 satisfies the condition of at least less than 180 degrees, preferably within the range of 130 degrees to 170 degrees, more preferably within the range of 140 degrees to 160 degrees, and even more preferably about 150 degrees. Good.

  Further, in the diaphragm device 1 according to the embodiment of the present invention, two optical elements are used with respect to the virtual reference axis J5 that is orthogonal to the rotation center axis of the lever member 61 and parallel to the moving direction X of the filter support member 28. When the filters 26 and 27 are in the first arrangement state and the second arrangement state, the position (movement end position) of the operating pin 65 of the lever member 61 is a position shifted from the virtual reference axis J5 to one side. Thus, the rotation angle range θ3 of the lever member 61 is set to a position that is less than 180 degrees. This point will be described in more detail.

  First, considering the rotational operation range θ3 of the lever member 61 with reference to the virtual reference axis J5, it is as follows. That is, if the operating pin 65 is positioned on the virtual reference axis J5 when the lever member 61 starts to rotate, and the operating pin 65 is positioned on the virtual reference axis J5 even when the lever member 61 finishes rotating, The rotation operation range θ3 of the lever member 61 is 180 degrees.

  Further, in a plane in which the filter support member 28 of the filter unit 5 moves (in other words, in a plane parallel to the main surfaces of the optical filters 26 and 27), the region is divided into two with the virtual reference axis J5 as a boundary. The filter unit 5 is present in one area (upper side in the figure), and the filter operation unit 46 is present in the other area (lower side in the figure). Of these, the region on the side where the filter operating portion 46 exists is a region that does not satisfy the condition that the rotation angle range θ3 of the lever member 61 is less than 180 degrees. This is because when the lever member 61 starts rotating or ends, when the operating pin 65 at the tip of the lever member 61 moves beyond the virtual reference axis J5 to the region where the filter operating portion 46 exists, the lever member 61 This is because the rotational operation range θ3 of the angle exceeds 180 degrees.

  For this reason, the operating pin 65 of the lever member 61 is always present in the region where the filter unit 5 is present. Further, when the lever member 61 rotates, the operating pin 65 moves on a circumference at a certain distance from the rotation center axis of the lever member 61 in the region where the filter unit 5 exists. Further, the operating pin 65 moves on the circumference from one moving end toward the other moving end, or conversely moves from the moving end toward the one moving end. Therefore, assuming that the rotation angle range θ3 of the lever member 61 is set to 150 degrees, the operating pin 65 is in a state where the filter support member 28 is moved to one moving end as shown in FIG. Since the second end of the movement has been reached, the angle θ4 formed by the axis J3 with respect to the virtual reference axis J5 is 15 degrees. In addition, in the state where the filter support member 28 is moved to the other moving end as shown in FIG. 12B, the operating pin 65 is also moved to the other moving end, so that it is relative to the virtual reference axis J5. The angle θ5 formed by the axis J4 is 15 degrees. Although the angles θ4 and θ5 may be different from each other, in the present embodiment, it is assumed that the angles θ4 and θ5 are equal to each other as a preferable example.

  In such a case, when the distance from the virtual reference axis J5 to the operating pin 65 is defined in the Y direction perpendicular to the virtual reference axis J5, this distance changes as follows according to the rotation of the lever member 61. That is, when the filter unit 5 is moved from one moving end toward the other moving end by the rotation of the lever member 61, the distance from the virtual reference axis J5 to the operating pin 65 changes so as to increase gradually. Then, it changes so as to become gradually smaller. For this reason, the distance from the virtual reference axis J5 to the operating pin 65 is minimum when the filter unit 5 is moved to one moving end or the other moving end by the rotation of the lever member 61, and the lever member 61 is just in the middle. It becomes the maximum when it rotates to the angle of (when it becomes a magnetic equilibrium state). Further, the position of the operating pin 65 when the optical filters 26 and 27 are in the first arrangement state is shifted to one side (the upper side in the drawing) from the virtual reference axis J5 with the minimum distance. The position of the operating pin 65 when the positions 26 and 27 are in the second arrangement state is also shifted to the one side from the virtual reference axis J5 with the minimum distance.

Next, the filter switching operation in the diaphragm device will be described.
The filter switching operation is an operation of switching the arrangement state of the optical filter with respect to the incident optical path. In particular, in the embodiment of the present invention, since the filter unit 5 includes the two optical filters 26 and 27, the filter switching operation refers to an operation of switching an optical filter disposed on the incident optical path. This filter switching operation is performed by reciprocating the filter support member 28 in the X-axis direction.

  Hereinafter, the filter switching operation in the embodiment of the present invention will be described in detail. First, the filter driving unit 7 is driven to switch the optical filter. Specifically, a magnetic field is formed by energizing the above-described coil 71 (see FIG. 7). Then, the magnet 50 is rotated by the action of the magnetic field formed by energizing the coil 71. This operation principle is as described with reference to FIGS. 10 (A) and 10 (B).

  Further, when the magnet 50 rotates, the arm member 51 rotates together with the magnet 50. When the arm member 51 is rotated, the lever member 61 is rotated by transmission of the rotational force between the gear portion 55 and the gear portion 62. At this time, the fitting state of the operating pin 65 and the long hole 67 is always maintained including the period during which the lever member 61 is rotating and the period during which the lever member 61 is stopped. For this reason, when the lever member 61 rotates, the filter unit 5 moves in the X direction by the power transmission accompanying the fitting of the operating pin 65 and the long hole 67. That is, the rotation operation of the lever member 61 accompanying the rotation of the arm member 51 is converted into the movement operation of the filter unit 5. In addition, the direction in which the filter unit 5 moves in the X direction depends on the rotation angle and the rotation direction of the filter operating unit 46. Therefore, the arrangement state of the optical filter can be switched by the movement of the filter unit 5 accompanying the drive of the filter driving unit 7.

Next, an effect obtained by the diaphragm device according to the embodiment of the present invention will be described.
In the diaphragm device and the camera including the same according to the embodiment of the present invention, the filter switching mechanism is realized in a space-saving manner, and the driving force necessary for switching the optical filter is reduced and the switching operation is speeded up. be able to. The reason is described below.

  As an optical filter switching operation, there are a case of switching from the first arrangement state to the second arrangement state and a case of switching from the second arrangement state to the first arrangement state, but the difference between them is only the directionality. It is. Therefore, here, as an example, only the case of switching from the first arrangement state to the second arrangement state will be described.

  First, as a configuration of the filter switching means in the diaphragm device 1, the arm member 51 and the lever member 61 are combined, and the lever member 61 is rotated at a larger angle than the arm member 51 by transmitting power from the gear portion 55 to the gear portion 62. It is configured. For this reason, the filter support member 28 can be reciprocated over a wide range by the rotation of the lever member 61. Further, compared with the rotation operation of the lever member 61, the rotation operation of the arm member 51 is very small. Therefore, the operation space for filter switching can be reduced. Therefore, the filter switching means (filter switching mechanism) can be realized in a space-saving manner.

  Further, the position of the operation pin 65 when the optical filters 26 and 27 are in the first arrangement state is shifted to one side from the virtual reference axis J5. In this state, the position of the operation pin 65 is set to the virtual reference axis J5 shown in FIG. On the other hand, the angle θ4 formed by the axis J3 is an acute angle (for example, 15 degrees). Therefore, after that, when the filter driving unit 7 is driven to switch the arrangement state of the optical filters 26 and 27, the operation pin 65 tries to move in a direction perpendicular to the axis J3 by the rotation of the lever member 61. To do. Therefore, a component force in the X direction acts on the fitting portion between the operating pin 65 and the long hole 67. This component force works simultaneously with the start of driving of the filter drive unit 7.

  On the other hand, for example, when the filter driving unit 7 is driven from a state in which the operation pin 65 exists on the virtual reference axis J5, the operation pin 65 tries to move in a direction perpendicular to the virtual reference axis J5. For this reason, almost no component force in the X direction acts on the fitting portion between the operating pin 65 and the long hole 67. Therefore, the driving force required for switching the optical filter is larger than in the case of the present embodiment. In the case of the present embodiment, the filter support member 28 starts to move so as to be boosted by the component force that acts when the filter drive unit 7 starts to drive. For this reason, it is possible to reduce the driving force required for switching the optical filter, particularly the driving force required at the start of the switching operation.

  If the operating pin 65 is present in the “region where the filter operating unit 46 exists” beyond the virtual reference axis J5 and the filter driving unit 7 is driven from this state, first, the filter support member 28 is It moves in the opposite direction from the direction it should finally go. Next, after the operation pin 65 passes so as to cross the virtual reference axis J5, the filter support member 28 moves in a direction to be finally directed. Therefore, the driving amount necessary for switching the optical filter is larger than in the case of the present embodiment. In addition, when the filter support member 28 moves in the opposite direction, an inertial force acts on the filter unit 5, and when the operating pin 65 passes through the virtual reference axis J5, a reverse force is applied so as to counter this inertial force. Need to add. For this reason, the driving force required for switching the optical filter is larger than in the case of the present embodiment.

  Further, in the embodiment of the present invention, as described above, after the movement of the filter support member 28 is started by the component force that is applied when the drive of the filter drive unit 7 is started, the rotation operation of the arm member 51 is amplified. The member 61 rotates at high speed. For this reason, the time required from the start of movement of the filter support member 28 to the end thereof is shortened. As a result, when the optical filter is switched, the filter support member 28 can be moved easily and quickly.

  In the embodiment of the present invention, the configuration of the filter drive unit 7 is such that the magnetic poles (N pole, S pole) of the magnet 50 are in a magnetic equilibrium state when the rotation angle of the magnet 50 is an intermediate angle. ) And the magnetic body 72 are set. Therefore, regardless of which direction the filter support member 28 is moved in the X direction, the magnetic attraction force acting between the magnetic poles of the magnet 50 and the magnetic body 72 during the movement is efficient for the rotation operation of the arm member 51. Can be used well.

Next, modified examples of the present invention will be described.
The technical scope of the present invention is not limited to the above-described embodiments, and includes various modifications and improvements as long as the specific effects obtained by the constituent elements of the invention and combinations thereof can be derived.

  For example, the combination of optical filters is not limited to the combination of an infrared cut filter and a dummy filter, and may be a combination of other filters. Further, the combination form is not limited to the combination of different types of filters, and may be a combination of the same type of filters. As a combination of different types of filters, in addition to the example of the above embodiment, for example, a combination of an infrared cut filter and a color correction filter, a combination of a blue filter and a green filter, or the like can be considered. Further, as a combination of filters of the same type, for example, a filter that cuts (absorbs) light of the same color gamut, and a combination of filters having different absorption wavelengths as their characteristics can be considered.

  Further, the rotation transmission means is not limited to the gear transmission mechanism, and may be a power transmission mechanism in which a pulley and a timing belt are appropriately combined. However, it is preferable to employ a gear transmission mechanism in configuring the rotation transmission means in a simple and compact manner.

  Further, the present invention is not limited to an aperture device and a camera using the same, but can also be applied to an electronic device (for example, a security device) including the camera. Such an electronic device includes a camera according to an embodiment of the present invention and an image processing unit that processes an image signal output from the camera.

DESCRIPTION OF SYMBOLS 1 ... Diaphragm apparatus 2 ... Diaphragm board 3, 4 ... Diaphragm blade 5 ... Filter unit 6 ... Diaphragm drive part 7 ... Filter drive part 26, 27 ... Optical filter 28 ... Filter support member 51 ... Arm member 55 ... Gear part 61 ... Lever Member 62 ... Gear part 65 ... Actuation pin 67 ... Long hole 100 ... Camera J5 ... Virtual reference axis

Claims (5)

A diaphragm member that forms a diaphragm aperture through which incident light passes;
A first rotating member;
A second rotating member that rotates according to a rotation angle and a rotation direction of the first rotating member, and has an operating pin at a position separated from the rotation center axis of the first rotating member;
Rotation transmitting means for transmitting a rotational force from the first rotating member to the second rotating member and rotating the second rotating member at a larger angle than the first rotating member by transmitting the rotational force. When,
Two optical filters,
A filter support member that supports the two optical filters side by side and has a long hole that fits into the operating pin;
A base member that movably supports the filter support member in a uniaxial direction;
The second rotating member is configured using the first rotating member, the second rotating member, and the rotation transmitting means, and maintains the fitted state of the operating pin and the elongated hole. The filter support member is moved by the rotation of the first optical filter, and a first arrangement state in which one of the two optical filters is arranged on the incident optical path and a second arrangement in which the other optical filter is arranged on the incident optical path. Filter switching means for switching the arrangement state of the optical filter with respect to the incident optical path by reciprocating the filter support member between the arrangement state; and
With
The two optical filters are in the first arrangement state and the second arrangement with respect to a virtual reference axis that is orthogonal to the rotation center axis of the second rotation member and parallel to the moving direction of the filter support member. The position of the operating pin of the second rotating member when in the state is a position shifted to one side from the virtual reference axis, and the rotation angle range of the second rotating member is less than 180 degrees An aperture device characterized by being set at a position. The filter switching means includes a magnet that rotates integrally with the first rotating member, and a magnetic body that is provided to face the outer peripheral surface of the magnet, and is half the rotation angle necessary for switching the optical filter. The positional relationship between the magnet and the magnetic body is set so that the magnetic attractive forces acting between the magnetic poles of the magnet and the magnetic body are equal to each other when the magnet is rotated up to The diaphragm apparatus according to claim 1. The diaphragm device according to claim 1, wherein the two optical filters are supported by the filter support member, one optical filter is an infrared cut filter, and the other optical filter is a dummy filter. A diaphragm device according to any one of claims 1 to 3,
A photoelectric conversion element that converts light incident through the aperture opening into an electrical signal;
A camera comprising: A camera according to claim 4;
An image processing unit for processing an image signal output from the camera;
An electronic device comprising:

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