KR20120101984A - Diaphragm device, camera and electronic equipment - Google Patents

Abstract

PURPOSE: An iris device, a camera, and an electronic device are provided to reducing a space for a filter converting device and to reduce driving force required for a conversion of an optical filter. CONSTITUTION: An iris device comprises an iris member, a first rotating member, a second rotating member, a rotation transmitting member, two optical filters(26,27), a filter supporting member(28), a base member, and a filter converting member. The iris member forms an iris opening passing through incident lights. The second rotating member rotates according to a rotation angle and a rotation direction of the first rotating member and comprises an operation pin at a position spaced from a magnetism rotation central axis. The rotation transmitting member transmits torque to the second rotating member from the first rotating member and rotates the second rotating member at an angle larger than the first rotating member by the transmission of the torque. The filter supporting member supports two-dimensionally the two optical filters side by side and comprises a long hole interlocking with the operation pin. The base member supports the filter supporting member so that the filter supporting member freely moves to a first axial direction. The filter converting member converts an arrangement state of the optical filter with respect to an incident optical passage.

Description

Aperture device, camera and electronic equipment {Diaphragm device, camera and electronic equipment}

The present invention relates to an aperture device for adjusting the amount of incident light, a camera and an electronic device having the same.

Various cameras including a surveillance camera include an aperture device for adjusting the amount of light incident from the outside (hereinafter referred to as "incident light quantity"). The aperture device adjusts (qualifies) the incident light amount by changing the aperture opening size existing on the optical path of the incident light. As the structure of the diaphragm device, there is one in which light quantity is adjusted by the movement of the diaphragm member. Specifically, it is known to use a pair of aperture blades as an example of the aperture member (see Patent Document 1, for example).

Moreover, the day-and-night surveillance camera includes an image pickup device capable of color photographing. 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 photographing mode is changed so that the color photographing mode is applied when the subject is photographed during bright daylight, and the monochrome photographing mode when the subject is photographed at dark night.

Some of the above-described surveillance cameras have a function of switching an optical filter together with a switching function of a shooting mode (see Patent Documents 1 and 2, for example). Specifically, the image is captured using the infrared cut filter in the color photographing mode, and the image is captured without the infrared cut filter in the black and white photographing mode or through a separate optical filter. For this reason, in the case of imaging in the color imaging mode, light incident from the outside reaches the imaging element through the infrared cut filter. When photographing in the monochrome imaging mode, light incident from the outside reaches the imaging element without passing through the infrared cut filter or through the other optical filter.

As a mechanism for converting the arrangement of the optical filter (hereinafter referred to as a "filter conversion mechanism"), for example, in Patent Document 2, the optical filter is supported by a filter support member, and the filter support member is moved to enter A technique for advancing and retreating an optical filter with respect to an optical path is disclosed. The incident light path described herein refers to the path of light that is about to enter through the aperture opening.

In addition, Patent Literature 1 on the premise discloses a technique in which two optical filters are arranged next to each other in a common filter support member in parallel with each other, and the filter support member is moved and converted in the alignment direction of these optical filters. Specifically, the elongated hole is formed in the filter support member, and the distal end portion of the rotating arm which rotates under the driving force of the drive unit is connected to the elongated hole of the filter support member. And by converting the rotational motion of a rotation arm into the movement of a filter support member, it has a structure which moves two optical filters integrally with a filter support member.

JP 2003-348398 A JP 2007-17594 A

However, the technique described in Patent Document 1 (hereinafter referred to as "the first conventional technology") and the technique described in Patent Document 2 (hereinafter referred to as "the second conventional technology") have to be solved as follows. There was a challenge.

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

In addition, in the second prior art, there are problems to be solved as follows. That is, generally, the optical filter used for a camera etc. is comprised using the glass substrate. For this reason, the mass of an optical filter becomes large compared with the molded article of resin, etc. Thus, for example, when two optical filters are installed on a common filter support member and moved as in the first conventional art, the driving force required for the movement is increased, resulting in impaired high speed (lightness) of operation. do.

The main object of the present invention is to realize the space saving of the filter conversion mechanism in the aperture device having the conversion function of the optical filter, and to reduce the driving force required for the conversion of the optical filter and to speed up the conversion operation.

The first aspect of the present invention,

An aperture member forming an aperture opening through which incident light passes;

The first rotating member,

A second rotating member which rotates along the rotation angle and the rotating direction of the first rotating member and has an operation pin at a position away from the rotational central axis thereof;

Rotation transmission means for transmitting a rotational force from the first rotational member to the second rotational member and rotating the second rotational member at an angle greater than that of the first rotational member by transmitting the rotational force;

With two optical filters,

A filter support member having a long hole adapted to support the two optical filters in a planar side-to-side planar fashion, and to the actuating pins;

A base member for freely supporting the filter support member in one axis direction;

The filter support member is formed by rotating the second rotation member while maintaining the fitting state between the operation pin and the elongated hole. The filter support member is configured using the first rotation member, the second rotation member, and the rotation transmission means. The filter support member is moved between the first arrangement state in which one of the two optical filters is disposed on the incident optical path and the second arrangement state in which the other optical filter is arranged on the incident optical path. By reciprocating, the filter conversion stage for converting the arrangement state of the optical filter with respect to the incident optical path is provided,

When the two optical filters are in the first arrangement state and the second arrangement state with respect to a virtual reference axis that is perpendicular to the rotational center axis of the second rotating member and parallel to the direction of movement of the filter support member. The diaphragm characterized in that the position of the said operation pin of the said 2nd rotating member is set to the position from which all shifted to the one side from the said virtual reference axis, and the rotation angle range of the said 2nd rotating member becomes less than 180 degrees. Device.

According to a second aspect of the present invention, in the aperture device according to the first aspect,

The filter converting means includes a magnet which rotates integrally with the first rotating member, and a magnetic body provided to face an outer circumferential surface of the magnet, and when the magnet rotates to half of the rotation angle required for conversion of the optical filter. And the positional relationship between the magnet and the magnetic body is set such that the magnetic attraction forces acting between the magnetic poles of the magnet and the electrical magnetic body are equal to each other.

According to a third aspect of the present invention, in the aperture device according to the first aspect,

The two optical filters are supported by the filter support member, and one optical filter is an infrared cut filter, and the other optical filter is a dummy filter.

According to a fourth aspect of the present invention,

The aperture device according to any one of the first to third embodiments;

And a photoelectric conversion element for converting light incident through the aperture opening into an electrical signal.

5th aspect of this invention,

The camera according to the fourth aspect,

And an image processing unit for processing an image signal output from the camera.

According to the present invention, in the diaphragm apparatus having a switching function of the optical filter, the space saving of the filter conversion mechanism can be realized, and the driving force required for the conversion of the optical filter can be reduced and the speed of the conversion operation can be realized.

1 is a view showing a configuration example of a camera to which the present invention is applied.
2 is a perspective view showing an overall configuration example of an aperture device according to an embodiment of the present invention.
3 is an exploded perspective view showing an example of the overall configuration of an aperture device according to an embodiment of the present invention.
4 is a perspective view 1 showing a state in which a pair of diaphragm blades and a diaphragm drive unit are installed on the diaphragm substrate.
5 is a perspective view 2 showing a state in which a pair of diaphragm blades and a diaphragm drive unit are installed on the diaphragm substrate.
6 is an exploded perspective view showing the configuration of the filter unit.
7 is an exploded perspective view showing the configuration of the filter drive unit.
It is a schematic diagram explaining the relative positional relationship of each component part of a filter drive part.
Fig. 9 is a perspective view 1 showing a state in which a filter unit and a filter driving unit are installed on an aperture board.
It is a figure explaining the rotation operation of a magnet.
FIG. 11 is a perspective view 2 showing a state in which a filter unit and a filter driving unit are installed on an aperture board.
It is a figure explaining the relationship between the movement operation of a filter unit, and the rotation operation of a filter operation part and a lever member.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail, referring drawings.

First, the configuration of the camera will be described.

1 shows a configuration example of a camera to which the present invention is applied, (A) is an external view of the entire camera, and (B) is a schematic diagram of the inside of the barrel. The illustrated camera 100 is, for example, a surveillance camera installed on a ceiling part (or a wall, etc.) of a building for crime prevention purposes. This camera 100 is provided with the mounting base 101 and the camera main body 102. As shown in FIG. The mounting base 101 is structured to be fixed to the ceiling part of a building by screwing, for example.

The camera body 102 includes a barrel 103 and an objective lens 104. The optical system including the objective lens 104 is included inside the barrel 103. The objective lens 104 is attached to the tip of the barrel portion 103. In addition, the camera body 102 includes an aperture device 1 and an imaging device 105 as one function part of the optical system. The aperture device 1 will be described in detail later.

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

In addition, this invention is not limited to the camera 100 illustrated here, but is applicable also to the camera of the other structure provided with the diaphragm 1. In addition, as the configuration of the optical system, various modifications such as the type, number, arrangement of lenses, and arrangement of the diaphragm 1 can be made.

Next, the structure of an aperture device is demonstrated.

(Overall configuration)

2 is a perspective view showing an overall configuration example of an aperture device according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view thereof. The illustrated aperture device 1 is largely composed of an aperture substrate 2, a pair of aperture blades 3 and 4, a filter unit 5, an aperture drive unit 6, and a filter drive unit ( It is comprised with 7).

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

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

(Aperture board)

The diaphragm substrate 2 is comprised using resin, for example. The diaphragm substrate 2 mainly has three board | substrates 11, 12, 13 integrally. The board | substrate part 11 is a part in which a pair of aperture blades 3 and 4 and the filter unit 5 are mounted. The board | substrate part 12 is a part in which the aperture drive part 6 is mounted, and the board | substrate part 13 is a part in which the filter drive part 7 is mounted. The opening part 14 is integrally formed in the board | substrate part 11 among these. Moreover, the recessed part 15 is integrally formed in the board | substrate part 12, and the recessed part 16 is integrally formed in the board | substrate part 13 ,.

(Aperture wings)

The pair of diaphragm vanes 3 and 4 is configured using, for example, a surface of a plate-like material made of polyethylene terephthalate (PET) coated with a carbon film. Each of the iris blades 3 and 4 is formed in a thin plate shape as a whole.

One aperture blade 17 is provided with one hole 17, three guide grooves 18a, 18b, and 18c and one engagement hole 19. The hole portion 17 has a circular shape, or a circular shape close thereto, and has a planar shape in which a part of the circular shape is notched in a V shape. The ND (Neutral Density) filter 20 is attached to a part of the hole part 17 (V-shaped notch part). The three guide grooves 18a, 18b, 18c are formed parallel to each other along the longitudinal direction of the diaphragm blade 3. Of the three guide grooves 18a, 18b, and 18c, two guide grooves 18b and 18c are formed on the same straight line. And about these two guide grooves 18b and 18c, the other guide groove 18a is formed in the edge part of the opposite side which interposed the hole part 17 in between. The engagement holes 19 are formed on the extension lines of the two guide grooves 18b and 18c. In addition, the engagement hole 19 is formed in the shape of a long hole 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 22a, 22b, 22c and one engagement hole 23. The hole portion 21 has a circular shape or a circular shape close to it, and has a planar shape in which a part of the circular shape is notched in a V shape. An ND filter 24 is attached to a part of the hole portion 21 (notched portion of the V-shape). The hole part 21 forms an aperture opening by overlapping with the premise hole part 17. The three guide grooves 22a, 22b, 22c are formed 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. And about these two guide grooves 22a and 22b, the other guide groove | channel 22c is formed in the edge on the opposite side which has the hole part 21 in between. The engagement holes 23 are formed on the extension lines of the two guide grooves 22a and 22b. Moreover, the engagement hole 23 is formed in elongate hole form by planar view along the short direction of the aperture blade 4.

(Filter unit)

The filter unit 5 includes two optical filters 26 and 27 and a filter support member 28 for supporting the two optical filters 26 and 27 in a planar manner, and the filter support member 28. It is comprised using the clasp 29 which stops the optical filters 26 and 27. FIG.

The two optical filters 26 and 27 are comprised by the following filters, for example. That is, one optical filter 26 is comprised by the infrared cut filter, and the other optical filter 27 is comprised by the dummy filter. An infrared cut filter is an optical filter which has the characteristic which interrupts the passage of the said infrared rays by absorbing infrared rays, for example. The dummy filter is an optical filter having a characteristic of transmitting at least infrared rays. Both optical filters 26 and 27 are comprised based on a transparent glass substrate. In addition, each glass substrate which comprises the optical filters 26 and 27 has the same refractive index of each other. Moreover, as a specific structural difference, the film | membrane which permeate | transmits visible light and absorbs infrared rays is formed in the main surface of the glass substrate which comprises one optical filter 26, for example, and comprises the other optical filter 27 The said film is not formed in the main surface of a glass substrate.

The reason for providing the infrared cut filter and the dummy filter in the filter unit 5 is that, when the arrangement of the optical filters is changed, there is no difference in the focal length (the distance from the main point of the optical system to the focus) before and after the conversion. To do this. More specifically, in the absence of a dummy filter, a difference in focal length occurs due to a difference in refractive index of light passing therein with and without the infrared cut filter disposed on the incident optical path. On the other hand, when the dummy filter is disposed on the incident optical path in such a manner as to replace the infrared cut filter, the difference in focal length due to the difference in refractive index of the light is eliminated. For the above reasons, the dummy filter is provided in the filter unit 5. However, the reason for providing the two optical filters 26 and 27 may be a reason other than this.

(Aperture drive part)

The aperture drive unit 6 uses an aperture operation unit 31, a bobbin assembly 32, a yoke 33, a relay substrate 34, a magnetic body (not shown), and a coil (not shown). Consists of.

The diaphragm operation part 31 is equipped with the magnet (permanent magnet) 35 and the arm member 36. The magnet 35 is formed in the circumferential form. The magnet 35 is magnetized with one half moon portion of the circular cross section on the N pole side and the other half moon portion on the S pole side. As the center axis of the magnet 35, a shaft hole (not shown) is formed along the center axis, and the shaft 37 of the arm member 36 is inserted into the shaft hole.

The arm member 36 is obtained by, for example, integral molding of resin. The arm member 36 has the arm parts 39a and 39b integrally with the base part 38 in addition to the axis 37 mentioned above. The base portion 38 has a shape corresponding to the outer shape of the magnet 35 and is formed in a plate shape. The axis 37 mentioned above is formed in the state which stands up perpendicularly from the center of the base part 38. As shown in FIG. The arm portions 39a and 39b are formed 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, for example, an adhesive or the like. As a result, the magnet 35 and the arm member 36 rotate integrally with respect to the shaft 37. Moreover, the pair of arm parts 39a and 39b are each formed in the crank shape. The nail part 40a is formed in the front-end | tip part of one arm part 39a, and the nail part 40b is formed also in the tip part of the other arm part 39b.

The bobbin assembly 32 accommodates the magnet 35 and the part of the arm member 36 (mainly the base portion 38) of the aperture operation unit 31 described above, and includes an insulating material such as resin, for example. It is formed using. In the state where the diaphragm operation part 31 is put into the bobbin assembly 32, this diaphragm operation part 31 is made to support rotation freely about the said shaft 37. In addition, the magnetic body (not shown) mentioned above is attached to the bobbin assembly 32, and the coil (not shown) mentioned above is wound up to the bobbin assembly 32. As shown in FIG.

The yoke 33 suppresses leakage of the magnetic force 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 diaphragm operation part 31, a magnetic body (not shown), and a coil (not shown) are assembled.

The relay board 34 electrically connects a coil (not shown) wound around the bobbin assembly 32 and an aperture control unit (not shown). When the aperture control unit satisfies the predetermined condition, the aperture control unit rotates the aperture operation unit 31 by energizing the coil wound around the bobbin assembly 32. The relay board 34 is composed of a circular printed wiring board corresponding to the diameter of the yoke 33. The relay board 34 corresponds to the plurality of terminal portions 42 corresponding to the plurality of terminal pins 41 (four in the drawing example) provided at one end of the bobbin assembly 32 and the plurality of terminal portions 42. It has a plurality of terminal portions 43. A coil (not shown) wound around the bobbin assembly 32 is connected to the plurality of terminal pins 41, and each terminal pin 41 is further 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 respectively connected to the terminal portions 43 of the relay board 34. The lead wire (not shown) electrically connects the relay board 34 and the aperture control unit (not shown).

(Filter drive unit)

The filter drive part 7 is comprised using the filter operation part 46, the bobbin assembly 47, the yoke 48, the relay board, a coil (described later), and a magnetic body (described later). The filter drive part 7 comprises the filter switching means with the lever member 61 mentioned later. This filter switching means means a means for changing 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 the movement of the filter unit. Hereinafter, the configuration of the filter switching means will be described.

The filter operation part 46 is equipped with the magnet (permanent magnet) 50 and the arm member 51. The magnet 50 is formed in the circumferential form. The magnet 50 is magnetized with one half moon portion of the circular cross section on the N pole side and the other half moon portion on the S pole side. As the center axis of the magnet 50, a shaft hole (not shown) is formed along the center 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 1st rotation member. The arm member 51 can be obtained by integral molding of resin, for example. The arm member 51 has the base part 53 and the arm part 54 integrally in addition to the axis | shaft 52 mentioned above. The base portion 53 has a shape corresponding to the outer shape of the magnet 50 and is formed in a plate shape. The shaft 52 mentioned above is formed in the state which stands up perpendicularly from the center of the base part 53. As shown in FIG. The arm portion 54 is formed to extend from the base portion 53 to one side. The arm member 51 is fixed to the magnet 50 using an adhesive agent etc., for example. As a result, the magnet 50 and the arm member 51 are integrally rotated around the shaft 52. Moreover, the arm part 54 is formed in L shape. The gear part 55 is provided in the front-end | tip part of the arm part 54. As shown in FIG. The gear part 55 is formed in the shape of an arc having a center on the virtual axis of the same axis as the axis 52 of the arm member 51. The gear part 55 has an angle range of less than 90 degrees, specifically 60 degrees or an angle range, with respect to the polar coordinate system centering the axis 52 (coordinate origin). It becomes structure to arrange teeth continuously.

The bobbin assembly 47 accommodates the magnet 50 of the arm member 51 and the part (mainly the base part 53) of the arm member 51 mentioned above, and is formed using insulating materials, such as resin, for example. It is. In the state where the bobbin assembly 47 includes the filter operation part 46, this filter operation part 46 is made to support rotation freely about the said shaft 52. As shown in FIG. In addition, the magnetic body (not shown) mentioned above is attached to the bobbin assembly 47, and the coil (not shown) mentioned above is wound up to the bobbin assembly 47. As shown in FIG.

The yoke 48 suppresses leakage of magnetic force 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 filter operating portion 46, the magnetic material (not shown), and the 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). When the filter control part satisfies a predetermined condition, the filter control part rotates the filter operation part 46 by energizing the coil wound around the bobbin assembly 47. The relay board 49 is comprised from the circular printed wiring board corresponding to the diameter of the yoke 48. The relay board 49 corresponds to the plurality of terminal portions 57 corresponding to the plurality of terminal pins 56 (four in the drawing example) provided at one end of the bobbin assembly 47 and the plurality of terminal portions 57. It has a plurality of terminal portions 58. A coil (not shown) wound around the bobbin assembly 47 is connected to the plurality of terminal pins 56, and each terminal pin 56 is further connected to each terminal portion 57 of the relay board 49. The relay board 49 is disposed at one end of the yoke 48. In addition, corresponding lead wires (not shown) are respectively 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).

Moreover, the lever member 61 is provided as a member belonging to the filter drive part 7. As shown in FIG. The lever member 61 is provided as an example of the second rotating member. The lever member 61 is obtained by, for example, integral molding of resin. The lever member 61 has the cogwheel portion 62, the shaft portion 63, the lever portion 64, and the operation pin 65 integrally. The lever member 61 rotates by making the center axis of the spindle portion 63 its own rotation center axis.

The cogwheel portion 62 constitutes a cogwheel transmission mechanism together with the cogwheel portion 55 of the arm member 51 described above. This gear transmission mechanism is provided as an example of a power transmission means. The gear part 62 has an angle range of 180 degrees or close thereto and has a structure in which a plurality of teeth are arranged continuously in an arc shape. The gear part 62 meshes with the gear part 55 mentioned above, and rotates together. At this time, in both gears, power (hereinafter also referred to as "rotation force") is transmitted from the gear portion 55 to the lever member 61. For this reason, the arm member 51 which has the gear part 55 becomes a rotating member on the coarse side, and the lever member 61 which has the cogwheel part 62 becomes a rotating member on the driven side. Moreover, the lever member 61 rotates along the rotation angle and rotation direction of the arm member 51. The pitch circle diameter of the gear part 62 is set shorter than the pitch circle diameter of the gear part 55. For this reason, when the rotational force is transmitted in the part where the gearwheel 55 and the gearwheel 62 mesh with each other, the rotation angle of the gearwheel 62 is the rotation angle of the gearwheel 55. Greater than From this, the rotation angle is amplified with the transmission of the rotational force between the gear part 55 and the gear part 62.

The gear part 62 is formed in substantially the same plane as the lever part 64. Moreover, the gear part 62 is formed in the vicinity of the base end part of the lever part 64, and is formed. The shaft portion 63 is formed in a cylindrical shape having a hole 63a. The central axis of the spindle portion 63 coincides with the center of the pitch circle of the gear part 62. That is, the shaft portion 63 is formed concentrically with the pitch circle corresponding to the outer diameter of the gear portion 62. The lever portion 64 is formed in a substantially triangular shape in plan view. The width dimension of the lever portion 64 is continuously changed in the longitudinal direction of the lever portion 64 (a portion from the base end portion of the lever portion 64 to the tip portion), and the widest portion of the lever portion 64 It is located in the base set. The above-mentioned axis | shaft part 63 is provided in the base end part of this lever part 64. As shown in FIG. The operation pin 65 is provided at the tip end of the lever part 64. For this reason, the axis | shaft 63 and the actuating pin 65 are arrange | positioned in the state separated by the distance corresponding to the length dimension of the lever part 64. As shown in FIG. Moreover, the actuating pin 65 is provided in the position separated from the rotation center axis of the lever member 61 in the longitudinal direction of the lever part 64. The pivot part 63 protrudes to one side of the thickness direction of the lever part 64, and the operation pin 65 protrudes to the other side of the thickness direction of the lever part 64. As shown in FIG.

Next, the relationship between the diaphragm board | substrate 2, a pair of aperture blades 3 and 4, and an aperture drive part 6 is demonstrated. 4 is a perspective view showing a state in which a pair of diaphragm blades and a diaphragm drive unit are installed on the diaphragm substrate. In FIG. 4, a pair of diaphragm blades 3 and 4 are mounted on one surface side of the diaphragm substrate 2 in a state where they overlap each other, and the other surface side of the diaphragm substrate 2 on the opposite side (recess shown in FIG. 3). The aperture driving unit 6 is provided in the unit 15. Each of the stop blades 3 and 4 is provided freely in the axial direction (slide material) by a plurality of guide pins 66 provided on one surface side of the stop substrate 2. One axis direction means the direction parallel to one linear axis. Each guide pin 66 is fitted into guide grooves 18a to 18c and 22a to 22c of the corresponding diaphragm vanes 3 and 4, respectively. Moreover, the diaphragm blades 3 and 4 overlap each other with a suitable gap, and are free to move in the longitudinal direction (X direction in FIG. 11) of the other board | substrate part 11. As shown in FIG. Moreover, the nail part 40b of the arm member 36 mentioned above is inserted in the engagement hole 19 of the aperture blade 3, and the arm member 36 mentioned above in the engagement hole 23 of the aperture blade 4 is carried out. Nail portion 40a is inserted therein.

Next, the aperture operation in the aperture device will be described. The aperture operation refers to an operation of changing the size of the aperture opening formed by the pair of aperture blades 3 and 4. As an example, the case where the size of a diaphragm opening is changed into big and small two steps is demonstrated as an example. However, this invention is not limited to this, For example, the structure which changes (adjusts) the size of a diaphragm opening to multistep (no stage) can also be employ | adopted by using a motor etc. as a drive source of an aperture operation.

First, when adjusting the aperture opening, the aperture driver 6 is driven. Specifically, a magnetic field is formed by energization with an unillustrated one. Then, the diaphragm operating part 31 rotates to one side or the other side according to the direction of the magnetic field formed by energization to the coil. When the diaphragm operating part 31 is rotated by the drive of the diaphragm driving part 6 in this way, the driving force is respectively corresponding to the diaphragm blades 3 and 4 by the arm parts 39a and 39b of the arm member 36, respectively. Is passed on. For this reason, when the diaphragm operation part 31 rotates, a pair of diaphragm blades 3 and 4 will move to an X direction in conjunction with it. However, the directions in which the pair of diaphragm blades 3 and 4 are moved are opposite to each other in the X direction. Moreover, when a pair of diaphragm blades 3 and 4 move, the area which the hole part 17 of the diaphragm blade 3 and the hole part 21 of the diaphragm blade 4 overlap with each other changes. The area where the two hole portions 17 and 21 overlap with each other defines the size of the aperture opening. For this reason, the size of a diaphragm opening can be changed by the movement of a pair of diaphragm vanes 3 and 4 accompanying the drive of the diaphragm drive part 6.

In addition, in the state shown in FIG. 4, the hole parts 17 and 21 are largely shift | deviated in the X direction, and the aperture blades 3 and 4 are moved so that an aperture opening may be minimum. In addition, in the state shown in FIG. 5, the hole parts 17 and 21 overlap each other exactly, and the aperture blades 3 and 4 are moved so that an aperture opening may be maximized.

Next, the structure of the filter unit 5 is demonstrated in detail. 6 is an exploded perspective view showing the configuration of the filter unit. As shown, the elongate hole 67 and the two circular hole parts 68 and 69 are provided in the filter support member 28 used as the base of the filter unit 5. The filter support member 28 is obtained by integral molding of resin, for example, and is formed in substantially rectangular plate shape. The long hole 67 is formed in one end part of the filter support member 28 in the longitudinal direction. In addition, the long hole 67 is formed in parallel with the short direction of the filter support member 28.

The two hole parts 68 and 69 are formed next to each other next to each other in the longitudinal direction of the filter support member 28. The optical filter 26 is attached to the filter support member 28 so that one hole 68 may be blocked, and the optical filter 27 is attached to the filter support member 28 to block the one hole 69. For this reason, the two optical filters 26 and 27 are provided next to each other side by side in the longitudinal direction of the filter support member 28 similarly to the corresponding hole part 68 and 69, respectively. The clasp 29 is comprised by the plate spring which has a suitable spring spring property, for example. The fastener 29 presses and fixes the optical filters 26 and 27 with respect to the filter support member 28. The clasp 29 is attached to the filter support member 28 so that the optical filters 26 and 27 attached to the filter support member 28 may be pressed simultaneously.

Next, the structure of a filter drive part is demonstrated in detail.

7 is an exploded perspective view showing the configuration of the filter drive unit. As shown in the drawing, the filter drive unit 7 is coupled to the filter operation unit 46, the bobbin assembly 47, the yoke 48, and the relay substrate 49 described above, and the coil 71 magnetic material 72 is applied. Equipped. The coil 71 is recommended for the bobbin assembly 47 in the form of an annular coil corresponding to the shape of the bobbin assembly 47. The coil 71 forms a magnetic field by generating a magnetic flux by passing an electric current through this. The magnetic body 72 is attached to the bobbin assembly 47 by, for example, adhesion. The magnetic body 72 generates magnetic attraction force between the magnetic poles (N pole or S pole) of the magnet 50 and maintains the position of the filter unit 5 by this magnetic attraction force.

It is a schematic diagram explaining the relative positional relationship of each component part of a filter drive part. As shown in the drawing, the magnet 50 is polarized into the N pole and the S pole. Here, two axes orthogonal to the center axis | shaft of the magnet 50 are made into the axis line J1 and the axis line J2, respectively. In doing so, the N pole and the S pole of the magnet 50 are arranged on the same axis J1. Moreover, the rotation angle range (theta) 1 of the magnet 50 which rotates around the intersection of the axis line J1 and the axis line J2 is in the formation angle range of the gear part 55 of the arm member 51 mentioned above. It is set at 60 degrees or close to it. On the other hand, the magnetic body 72 is arrange | positioned on the axis line J2 in the state which opposes the outer peripheral surface of the magnet 50. As shown in FIG. Moreover, the magnetic body 72 is arrange | positioned in the direction parallel to axis line J1 centering on the position of axis line J2.

In FIG. 8, the state in which the magnet 50 is in the middle of rotation, and the rotation angle of the magnet 50 is exactly halfway (half) is shown. 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 become equal to each other. This state is defined as "self-balancing state." On the other hand, when a current flows through the coil 71 mentioned above, a magnetic field will be formed, for example in the direction of arrow M1 in a figure. Moreover, when the direction of the electric current which flows through the coil 71 from this state is reversed, a magnetic field will be formed in the direction opposite to arrow M1 in FIG. Thus, the direction of the magnetic field formed by the energization to the coil 71 is set so that it may have the inclination angle (theta) 2 of 40 degrees-50 degrees with the axis J1, for example based on the axis J1. . This inclination angle θ2 is set so as to satisfy the condition of “θ2> θ1 / 2” when prescribed in relation to the rotation angle range θ1 of the magnet 50 described above.

Moreover, when the magnet 50 is rotated to one end with respect to the said rotation angle range (theta) 1, the filter unit 5 moves to one end by rotation of the arm member 51 and the lever member 61 accompanying this. It becomes a state. On the contrary, when the magnet 50 is rotated to the other end with respect to the rotation angle range θ1, the filter unit 5 moves to the other end by the rotation of the arm member 51 and the lever member 61 accompanying this. It becomes a state. 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). Becomes about 150 degrees more than 2 times of (theta) 1.

In addition, while the filter unit 5 moves from one end to the other, the actuating pin 65 of the lever member 61 moves to reciprocate along the long hole 67 of the filter support member 28. Then, when the constituent members exemplify, the rotational motion of the filter operating portion 46 and the lever member 61 and the movement of the filter unit 5 linked to the rotational motion are stopped together. For example, when the structural members collide with each other, the operation pin 65 is struck by one end of the long hole 67, the lever member 61 is struck by a part of the aperture substrate 2, or the like. You can think of

Next, the relationship between the diaphragm substrate, the filter unit, and the filter drive unit will be described. 9 is a perspective view illustrating a state in which a filter unit and a filter driving unit are installed on the diaphragm substrate. In FIG. 9, the filter unit 5 is mounted on one surface side of the diaphragm substrate 2, and the filter drive unit 7 is provided on the other surface side (concave portion 16 shown in FIG. 3) of the diaphragm substrate 2 on the opposite side. ) Is installed. The filter unit 5 is freely movable (slide material) in one axis direction (X direction in the figure) by freely supporting both edge portions of the filter support member 28 in the diaphragm substrate 2. In addition, the operation pin 65 of the lever member 61 described above is inserted into the long hole 67 of the filter support member 28. The operation pin 65 is free to move in the long axis direction of the long hole 67. Moreover, the direction (long-axis direction) of the elongate hole 67 becomes a direction parallel to the Y direction perpendicular to the moving direction (X direction) of the filter support member 28. As shown in FIG. The rectangular dimension of the elongate hole 67 is a rotational movement of the lever member 61 centering on the axis | shaft 63 by the reciprocating movement of the actuating pin 65 inserted in this in the major axis direction of the elongate hole 67. As shown in FIG. Is set to an allowable dimension in the rotation angle range of less than 180 degrees.

The lever member 61 is supported by rotation freely by the diaphragm 2. Specifically, the shaft portion 63 is inserted into the pin portion 73 (see FIGS. 4 and 5) provided in the diaphragm substrate 2 (see FIGS. 4 and 5) to insert the hole 63a (see FIG. 3) of the shaft portion 63. The rotation of the lever member 61 is supported freely. Moreover, the gear part 62 of the lever member 61 is meshed with the gear part 55 of the arm member 51 mentioned above. For this reason, power (rotational force) is transmitted between the arm member 51 and the lever member 61 by engaging the gears.

Next, the relationship between the rotation operation of a magnet and the movement operation of a filter unit is demonstrated.

First, the rotation operation of the magnet 50 will be described with reference to FIGS. 10A and 10B. 10 (A) and (B) assume a case where the filter driver 7 is viewed from above (the side where the filter driver 7 is mounted relative to the aperture board 2).

The magnet 50 rotates along the direction of this magnetic field by forming a magnetic field by energizing the coil 71 described above. Specifically, as shown in Fig. 10A, when the magnetic field is formed in the direction of the arrow M1, the magnet 50 is caused by the magnetic repulsive force acting between the magnetic pole of the magnetic field and the magnetic pole of the magnet 50. Rotate to one end As shown in Fig. 10 (B), when the magnetic field is formed in the direction of the arrow M2, the magnet 50 is different due to the magnetic attraction force acting between the magnetic pole of the magnetic field and the magnetic pole of the magnet 50. Rotate to the end

In addition, as shown in FIG. 10 (A), in the state in which the magnet 50 is rotated, the filter supporting member 28 of the filter unit 5 moves to one end in the X direction as shown in FIG. 9 above. It is in a state. In this case, one optical filter (the optical filter 26 in the example) is arranged on the optical path of the light to be incident through the aperture opening (hereinafter referred to as "first arrangement state"). Moreover, as the filter drive part 7 state, as shown in FIG. 10 (A), since the S pole of the magnet 50 is arrange | positioned closer to the magnetic body 72 than the N pole, the magnetic equilibrium state falls large. Therefore, the magnet 50 is urged in the counterclockwise direction by the magnetic attraction force acting between the S pole and the magnetic body 72. And the filter unit 5 is hold | maintained in the state which stopped by the one end of a X direction by this subordinate force.

On the other hand, in the state in which the magnet 50 is rotated as shown in the said FIG. 10 (B), the filter support member 28 of the filter unit 5 is to the other end of an X direction as shown in FIG. It is moved. In this case, one optical filter (in the example, the optical filter 27 is disposed (hereinafter referred to as "second arrangement state") is placed on the incident optical path incident through the aperture opening.) Filter As shown in FIG. 10 (B), the driving unit 7 is disposed closer to the magnetic body 72 than the N pole and the S pole of the magnet 50, so that the magnetic equilibrium state is greatly collapsed. 50 is urged in the clockwise direction by the magnetic attraction force acting between the N pole and the magnetic body 72. And the filter unit 5 is moved to the other side in the X direction by this bias force. Is maintained.

Next, the rotation angle range of the lever member will be described.

FIG. 12 (A) shows a state in which the filter unit is moved to one moving end in the X direction, and FIG. 12 (B) shows a state in which the filter unit is moved to the other moving end in the X direction. Here, the axis line which ties the rotation center axis | shaft of the lever member 61 and the center of the operation pin 65 is set to J3 in the state which moved the filter unit 5 to the other moving end. Moreover, in the state which moved the filter unit 5 to one moving end, the axis line which ties the rotation center axis | shaft of the lever member 61 and the center of the operation pin 65 is set to J4. In such a case, the angle formed by these axes J3 and J4 is used to move the filter unit 5 from one moving end to the other moving end or to move the filter unit 5 from one moving end to the other moving end. In the case of moving, it becomes the largest angle (theta) 3 which the lever member 61 rotates. 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 a condition of at least 180 degrees, preferably in the range of 130 to 170 degrees, more preferably in the range of 140 to 160 degrees, further preferably You can set it to about 150 degrees.

Moreover, about the diaphragm 1 which concerns on embodiment of this invention, the virtual reference axis J5 orthogonal to the rotation center axis of the lever member 61, and parallel to the moving direction X of the filter support member 28. ), The position (moving end position) of the operation pin 65 of the lever member 61 when the two optical filters 26 and 27 are in a 1st arrangement state and a 2nd arrangement state is a virtual reference | standard. The rotation angle range (theta) 3 of the lever member 61 is set to the position which becomes less than 180 degree | time at the position shifted | deviated to one side from the axis J5. This point is explained in more detail.

First, when the rotational operation range θ3 of the lever member 61 is considered based on the virtual reference axis J5, it becomes as follows. That is, if the lever member 61 starts to rotate, the actuating pin 65 is located on the virtual reference axis J5, and even if the lever member 61 ends the rotation, the actuating pin 65 is virtual. When it is located on the reference axis J5, the rotational operation range θ3 of the lever member 61 is 180 degrees.

Moreover, it exists in the plane (in other words, the surface parallel to the main surface of the optical filters 26 and 27) which the filter support member 28 of the filter unit 5 moves, and borders on the virtual reference axis J5. When divided into two, the filter unit 5 exists in the area | region of one side (upper part in the figure), and the filter operation part 46 exists in the area | region of the other side (lower part in figure). Among these, the area | region on the side where the filter operation part 46 exists is an area | region which does not satisfy | fill the condition which the rotation angle range (theta) 3 of the lever member 61 becomes less than 180 degree | times. This is because, when the lever member 61 starts or ends the rotation, the region on the side where the actuating pin 65 at its tip crosses the virtual reference axis J5 and the filter actuating portion 46 is present. This is because the rotational operation range θ3 of the lever member 61 exceeds 180 degrees when it is moved up to.

For this reason, the actuating pin 65 of the lever member 61 always exists in the area | region on the side where the filter unit 5 exists. Moreover, when the lever member 61 rotates, the actuating pin 65 moves the circumferential image which fixedly distanced from the rotation center axis of the lever member 61 in the area | region on the side where the filter unit 5 exists. do. Moreover, the actuating pin 65 moves this circumferential image from one moving end to the other moving end, or, conversely, moves from one moving end to the other moving end. Therefore, assuming that the rotation angle range θ3 of the lever member 61 is set to 150 degrees, in the state where the filter support member 28 is moved to one moving end as shown in FIG. Since 65 is also moved to the other end of movement, the angle θ4 formed by the axis J3 with respect to the virtual reference axis J5 is 15 degrees. In addition, as shown in FIG. 12 (B), in the state where the filter support member 28 is moved to one moving end, the actuation pin 65 is also moved to the other moving end. The angle θ5 formed by the axis line J4 with respect to J5 is 15 degrees. In addition, although angle (theta) 4 and angle (theta) 5 may be mutually different angles, the case where angles (theta) 4 and (theta) 5 are mutually the same angle as a preferable example is assumed.

In this case, if the distance from the virtual reference axis J5 to the actuating pin 65 is defined in the Y direction perpendicular to the virtual reference axis J5, this distance changes as follows in accordance with the rotation of the lever member 61. do. That is, when the filter unit 5 is moved from one moving end to the other moving end by the rotation of the lever member 61, the distance from the virtual reference axis J5 to the actuating pin 65 is initially. It gradually changes as it grows, and then changes as it gradually decreases. For this reason, the distance from the virtual reference axis J5 to the operation pin 65 becomes the 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, The maximum value is obtained when the lever member 61 is rotated to an exactly intermediate angle (when it becomes self-balancing). Moreover, the position of the operation pin 65 when the optical filters 26 and 27 are made into the 1st arrangement | positioning position is the position which shifted to the one side (upper side in drawing) from the virtual reference axis J5 with the said minimum distance. In addition, the position of the operation pin 65 when the optical filters 26 and 27 are made into the 2nd arrangement | positioning state also becomes the position which shifted to one side from the virtual reference axis J5 with the said minimum distance. Next, the filter conversion operation in the aperture device will be described. The filter conversion operation refers to an operation of changing 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 two optical filters 26 and 27, the filter conversion operation refers to an operation of converting an optical filter disposed on the incident optical path. . This filter conversion operation is performed by reciprocating the filter support member 28 with respect to the X-axis direction.

EMBODIMENT OF THE INVENTION Hereinafter, the filter conversion operation | movement in embodiment of this invention is demonstrated in detail. First, the filter drive unit 7 is driven when the optical filter is changed. Specifically, a magnetic field is formed by energizing the coil 71 (see FIG. 7) described above. Then, the magnet 50 rotates by the action of the magnetic field formed by energization of the coil 71. This principle of operation is as described above with reference to Figs. 10 (A) and (B).

Moreover, when the magnet 50 rotates, the arm member 51 rotates integrally with this magnet 50. When the arm member 51 rotates, the lever member 61 rotates by the transmission of the rotational force between the gear part 55 and the gear part 62. At this time, the fitting state of the operation pin 65 and the long hole 67 is always maintained including the period in which the lever member 61 rotates, or the period in which it is stopped. For this reason, when the lever member 61 rotates, the filter unit 5 will move to a X direction by the power transmission accompanying fitting of the operation pin 65 and the long hole 67. FIG. That is, the rotational movement of the lever member 61 accompanying the rotation of the arm member 51 is converted into the movement operation of the filter unit 5. Moreover, the direction which the filter unit 5 moves with respect to an X direction becomes according to the rotation angle and rotation direction of the filter operation part 46. FIG. Therefore, it becomes possible to change the arrangement | positioning state of an optical filter by the movement of the filter unit 5 with the drive of the filter drive part 7. FIG.

Next, the effect obtained by the aperture device which concerns on embodiment of this invention is demonstrated. In the aperture device and the camera including the camera according to the embodiment of the present invention, space saving of the filter conversion mechanism can be realized, and the driving force required for the conversion of the optical filter can be reduced and the speed of the conversion operation can be realized. Below, the reason is demonstrated.

As a conversion operation of the optical filter, there is a case of switching from the first arrangement state to the second arrangement state and switching from the second arrangement state to the first arrangement state, but the difference between them is only directional. Therefore, only the case of switching from a 1st arrangement state to a 2nd arrangement state is demonstrated here as an example.

First, as a structure of the filter conversion means in the diaphragm 1, the arm member 51 and the lever member 61 are combined, and the arm is transmitted by the power transmission from the gear part 55 to the gear part 62. The lever member 61 is rotated at an angle larger than that of the member 51. For this reason, the filter support member 28 can be reciprocated extensively by the rotation of the lever member 61. Moreover, compared with the rotational movement of the lever member 61, the rotational motion of the arm member 51 becomes very small. Therefore, the operation space for filter conversion becomes small. Therefore, space saving of the filter conversion means (filter conversion mechanism) can be realized.

In addition, the position of the operation pin 65 when the optical filters 26 and 27 are in the 1st arrangement | positioning state will be in the state which shifted | deviated to one side from the virtual reference axis J5, and in this state shown in FIG. The angle θ4 formed by the axis J3 with respect to the virtual reference axis J5 becomes an acute angle (for example, 15 degrees). For this reason, after driving the filter drive part 7 in order to change the arrangement | positioning state of the optical filter 26, 27, the operation pin 65 is rotated by the rotation of the lever member 61, and the said axis | shaft ( Attempt to move in a direction perpendicular to J3). Therefore, the component force of the X direction acts on the fitting part of the operation pin 65 and the long hole 67. FIG. This component acts simultaneously when the drive of the filter drive part 7 starts.

On the other hand, when driving the filter drive part 7 from the state in which the actuating pin 65 exists on the virtual reference axis J5, for example, the actuating pin 65 is connected with the virtual reference axis J5. Attempt to move in a vertical direction. For this reason, the component force of the X direction hardly acts on the fitting part of the operation pin 65 and the long hole 67. FIG. Therefore, the driving force required for conversion of an optical filter becomes larger than the case of this embodiment. In the case of this embodiment, the filter support member 28 starts moving so that it may be supported by the working component at the start of the drive of the filter drive part 7. For this reason, the drive force required for conversion of an optical filter, especially the drive force required at the start of a conversion operation | movement can be reduced.

In addition, if the operation pin 65 exists in the "region on the side where the filter operation part 46 exists" beyond the virtual reference axis J5, and drives the filter drive part 7 from the state, In other words, the filter support member 28 moves in a direction opposite to the direction to be finally directed. Subsequently, after the actuating pin 65 passes through the virtual reference axis J5, the filter support member 28 moves in the direction that should be finally directed. Therefore, the driving amount required for the conversion of the optical filter is larger than in the case of the present embodiment. In addition, when the inertia force acts on the filter unit 5 by the movement of the filter support member 28 in the said opposite direction, when the actuating pin 65 passes through the virtual reference axis J5, it will reverse | inverse to this inertia force Need to add power. For this reason, the driving force required for conversion of an optical filter becomes larger than the case of this embodiment.

In addition, about embodiment of this invention, after starting the movement of the filter support member 28 by the component force which acts at the start of the drive of the filter drive part 7, the arm member 51 rotates, as mentioned above. The lever member 61 rotates at a high speed so that the operation is amplified. For this reason, the time required from the start of the movement of the filter support member 28 to the end thereof becomes shorter. As a result, during the conversion of the optical filter, the filter support member 28 can be moved lightly and quickly.

Moreover, about embodiment of this invention, as a structure of the filter drive part 7, the magnetic pole (N pole, S pole) of the magnet 50 is made to be self-balancing when the rotation angle of the magnet 50 is in the intermediate angle. ) And the magnetic body 72 are set. For this reason, even when the filter support member 28 is moved in any direction 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 thereof is determined by the arm member 51. It can be utilized efficiently for rotation operation.

Next, modified examples of the present invention and the like will be described.

The technical scope of the present invention is not limited to the above-described embodiment, but is for a range capable of eliciting specific effects obtained by the constituent requirements of the invention and the combination thereof, and includes various modifications and improvements. It also includes forms.

For example, the combination of the optical filter is not limited to the combination of the infrared cut filter and the dummy filter, but may be a combination of other filters. Moreover, as a form of a combination, it is not limited to the combination of a heterogeneous filter, It can be a combination of the same kind of filter. As a heterogeneous filter combination, besides the said embodiment example, the combination of an infrared cut filter and a color correction filter, or the combination of a blue filter and a green filter can be considered, for example. Moreover, as a combination of the same kind of filter, it is a filter which cuts (absorbs) the light of the same color gamut, for example, the combination etc. of the filters which made the absorption wavelength different as each characteristic can be considered.

The rotation transmission means is not limited to the gear transmission mechanism, but may be, for example, 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 for constituting the rotation transmission means in a simple and compact manner.

In addition, the present invention is not limited to an aperture device and a camera using the same, but is also applicable to electronic devices (for example, security devices, etc.) provided with the camera. Such an electronic device has a configuration including a camera according to an embodiment of the present invention and an image processing unit that processes an image signal output from the camera.

One; Aperture device 2; Aperture board,
3, 4; Aperture wing 5; Filter unit,
6; Aperture drive 7; Filter drive
26, 27; Optical filter, 28; Filter support member,
51; Absence of cancer, 55; Cog Wheel,
61; Lever member, 62; Cog Wheel,
65; Working pin, 67; Long hall
100; Camera, J5; Virtual reference axis

Claims (5)

An aperture member forming an aperture opening through which incident light passes;
A first rotating member,
A second rotating member having an actuating pin at a position away from a magnetic rotational central axis while rotating along the rotation angle and the rotating direction of the first rotating member;
Rotation transmission means for transmitting a rotational force from the first rotational member to the second rotational member and rotating the second rotational member at an angle greater than that of the first rotational member by transmitting the rotational force;
With two optical filters,
A filter support member having a long hole adapted to support the two optical filters in a planar side-to-side planar fashion, and to the actuating pins;
A base member for freely supporting the filter support member in one axis direction;
The filter support member is formed by rotating the second rotation member while maintaining the fitting state between the operation pin and the elongated hole. The filter support member is configured using the first rotation member, the second rotation member, and the rotation transmission means. The filter support member is moved between the first arrangement state in which one of the two optical filters is disposed on the incident optical path and the second arrangement state in which the other optical filter is arranged on the incident optical path. And a filter converting means for converting the arrangement state of the optical filter with respect to the incident optical path by reciprocating.
When the two optical filters are in the first arrangement state and the second arrangement state with respect to a virtual reference axis that is perpendicular to the rotational center axis of the second rotating member and parallel to the direction of movement of the filter support member. The diaphragm is set to the position where the rotation angle range of the said 2nd rotation member becomes less than 180 degree | times in the position which all shifted to the one side from the said virtual reference axis, the position of the said operation pin of the said 2nd rotation member of Device. The method according to claim 1,
The filter converting means includes a magnet which rotates integrally with the first rotating member, and a magnetic body provided to face an outer circumferential surface of the magnet, and when the magnet rotates to half of the rotation angle required for conversion of the optical filter. And the positional relationship between the magnet and the magnetic body is set such that magnetic attraction forces acting between the magnetic poles of the magnet and the magnetic body are equal to each other. The method according to claim 1,
The two optical filters are supported by the filter support member, and one optical filter is an infrared cut filter, and the other optical filter is a dummy filter. A camera comprising the aperture device according to any one of claims 1 to 3, and a photoelectric conversion element for converting light incident through the aperture opening into an electrical signal. An electronic device comprising a camera according to claim 4 and an image processing unit which processes an image signal output from the camera.

Images