JP2016099427A - Shutter holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter holding mechanism capable of reducing vibration and the like caused by reaction force of shutter blade movement and of holding a shutter unit in a stable manner.SOLUTION: A shutter holding mechanism includes; a shutter substrate 21 provided inside a camera body 1 and having a focal-plane shutter unit 2 fixedly mounted thereon; pressing means 11 that is located between the camera body and one end side of the shutter substrate to push the shutter substrate toward the other end side of the shutter substrate relative to the camera body; and damper means 13 that is located on a part of the camera body corresponding to the other end side of the shutter substrate opposite to a position where the pressing means is arranged, in a direction along a travel direction of a shutter blade of the shutter unit, to absorb movement of the shutter substrate pressed by the pressing means. The shutter substrate is arranged in the camera body such that the shutter substrate can move only in the direction along the travel direction of the shutter blade of the shutter unit.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a shutter holding mechanism for holding a focal plane shutter unit inside a camera body.

  Conventionally, in an imaging device that captures an optical image formed by an imaging optical system using an imaging element or the like (hereinafter referred to as a camera or the like), a shutter blade (light-shielding blade) that opens and closes the optical path of the imaging optical system; Normally, a shutter unit configured by a driving mechanism and a driving circuit for driving the shutter blades at an appropriate timing is fixedly held inside the camera body.

  The shutter unit provided in a conventional camera or the like has, for example, a so-called focal plane type configured by arranging shutter blades that run parallel to the light receiving surface of the image sensor in the vicinity of the front side of the image sensor. Things are popular.

  In a conventional camera having a focal plane type shutter unit, when the shutter blades are driven to open and close the shutter blades, for example, when the shutter blades start to travel, the traveling reaction force is The shutter frame member that holds the shutter blades acts to move the shutter frame member (the shutter frame member) in a direction opposite to the traveling direction of the shutter blades. Further, when the travel of the shutter blades stops at a predetermined position, the shutter blades may come into contact with a predetermined fixing member in the travel direction, and an impact force may be generated.

  In this case, if the force generated in the traveling direction of the shutter blades when the shutter unit is driven is transmitted to the camera body, the camera body is vibrated. Furthermore, if the vibration is transmitted to the imaging unit including the imaging element or the lens barrel through the camera body, there is a possibility that an adverse effect such as image blurring may occur on the acquired image. There was a problem.

  Therefore, in conventional cameras and the like to which a focal plane type shutter unit is applied, a device such as an elastic buffer member is provided between the camera body and the shutter unit when the shutter unit is fixedly held inside the camera body. Was given. With such a configuration, the shutter unit is allowed to move within a predetermined range. Then, a reaction force generated by the shutter blades generated when the shutter unit is driven acts on the shutter unit itself and moves the shutter unit within a predetermined range, thereby causing vibration generated when the shutter unit is driven. Etc. are absorbed.

  As described above, for a shutter holding mechanism that has been devised to reduce and suppress vibration generated when the amount of force generated when the shutter unit is driven is transmitted to the camera body, for example, see Japanese Patent Application Laid-Open No. 6-67259. Various proposals have been made and put into practical use by Japanese Laid-Open Patent Publication No. 9-189939, Japanese Laid-Open Patent Publication No. 9-244099, and the like.

JP-A-6-67259 JP-A-9-189939 Japanese Patent Laid-Open No. 9-244099

  However, in the shutter holding mechanism disclosed by the above-mentioned Japanese Patent Laid-Open Nos. 6-67259, 9-189939, 9-244099, etc., there is elasticity between the camera body and the shutter unit. Although it is possible to absorb an impact by interposing a buffer member having the above, there is a problem that the shutter unit is always held in an unstable state inside the camera body.

  The present invention has been made in view of the above-described points, and an object of the present invention is to release a shutter blade in a shutter holding mechanism for holding a focal plane type shutter unit inside a camera body. By providing a shutter holding mechanism having a structure that can reliably absorb, reduce, and suppress vibrations caused by running reaction force at the same time, and can hold the shutter unit in a stable state at all times. is there.

  In order to achieve the above object, a shutter holding mechanism of one embodiment of the present invention includes a shutter substrate provided in a camera body to which a focal plane shutter unit is fixed, the camera body, and one end side of the shutter substrate. A pressing means that presses the shutter substrate against the camera body toward the other end of the shutter substrate, and a direction along the traveling direction of the shutter blades of the shutter unit and the pressing Damper means for absorbing movement of the shutter substrate pressed by the pressing means, disposed at a position on the camera body side corresponding to the other end side of the shutter substrate on the side opposite to the portion where the means is disposed The shutter substrate is provided only in the direction along the traveling direction of the shutter blades of the shutter unit. Rotatably on it is disposed in the camera body.

  According to the present invention, in a shutter holding mechanism for holding a focal plane type shutter unit inside a camera body, vibrations and the like caused by a running reaction force when the shutter blades run are reliably absorbed and reduced and suppressed. At the same time, it is possible to provide a shutter holding mechanism having a structure capable of holding the shutter unit in a stable state at all times.

The disassembled perspective view which decomposes | disassembles the camera provided with the shutter holding mechanism of one Embodiment of this invention, and shows a one part component. The principal part disassembled perspective view which shows the shutter holding mechanism of this embodiment. FIG. 4 is an assembly diagram illustrating a state in which the shutter holding mechanism is attached to the inside of the front cover member in the camera to which the shutter holding mechanism of the present embodiment is applied. A longitudinal sectional view taken along line [4]-[4] in FIG. The principal part expanded sectional view which expands the site | part shown by the code | symbol [5] of FIG. 3, and shows one part in a cross section The principal part expanded sectional view which expands the site | part shown by the code | symbol [6] of FIG. 3, and shows one part in a cross section

  The present invention will be described below with reference to the illustrated embodiments. In an embodiment described below, an optical image formed by an imaging optical system is converted into a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) type image, for example. A photoelectric conversion element such as a sensor (hereinafter referred to as an imaging element) is used for sequential photoelectric conversion, and an image signal obtained thereby is used as image data in a predetermined form (for example, digital image data representing a still image or a moving image). An image display device, such as a liquid crystal display (LCD) or organic electroluminescence (organic), which stores in a storage medium and reproduces and displays a still image or a moving image based on digital image data stored in the storage medium. EL; Organic Electro-Luminescence (OEL) An imaging apparatus, which is an example applied to, for example, a digital camera or a video camera (hereinafter simply referred to as a camera) is shown.

  In the following embodiments, when the camera is placed on a table or the like in a normal posture, the horizontal axis toward the camera is the X axis, and the axis is orthogonal to the X axis. An axis in the vertical direction toward the camera is the Y axis, an axis orthogonal to both the X axis and the Y axis, and an axis in the front and rear direction toward the camera is the Z axis. . Here, it is assumed that the Z-axis is an axis that includes a direction that coincides with the optical axis O of the imaging optical system (not shown) of the camera and is parallel to the optical axis O. The optical axis O is an axis passing through the approximate center of the light receiving surface of the image sensor.

  In the present embodiment, in the direction along the optical axis O (Z-axis direction), the side facing the front of the camera (the side where the subject is located) is referred to as the front, and the image sensor is arranged closer to the back of the camera. The side with is called the rear.

  Each drawing used in the following description is schematically shown. In order to show each component to the extent that it can be recognized on the drawing, the dimensional relationship and scale of each member are shown differently for each component. There may be. Therefore, the present invention is limited to the illustrated embodiments with respect to the number of components, the shape of the components, the size ratio of the components, the relative positional relationship of the components, and the like described in the drawings. It is not something.

  FIG. 1 is an exploded perspective view showing an exploded camera having a shutter holding mechanism according to an embodiment of the present invention. In FIG. 1, only the constituent units that are part of the main constituent units in the camera of the present embodiment and are related to the present invention are shown, and all the constituent units in the camera are shown. Do not mean.

  FIG. 2 is an exploded perspective view of a main part showing the shutter holding mechanism of the present embodiment. In FIG. 2, a part of the camera body (front cover member) and constituent members around the shutter unit are extracted from the main constituent units shown in FIG. 1, and the shutter holding mechanism is disassembled.

  FIG. 3 is an assembly view showing a state in which the shutter holding mechanism is mounted inside a part of the camera body (front cover member) in the camera to which the shutter holding mechanism of the present embodiment is applied. In FIG. 3, in order to show the configuration of the shutter holding mechanism attached to the inside of a part of the camera body (front cover member), a state seen from the back side of a part of the camera body (front cover member) is shown. The illustration of the shutter unit attached to the shutter holding mechanism is omitted.

  FIG. 4 is a longitudinal sectional view taken along line [4]-[4] in FIG. FIG. 5 is an enlarged cross-sectional view of a main part, showing a pressing means (pressing spring unit) in the shutter holding mechanism of the present embodiment, with the portion indicated by the reference numeral [5] in FIG. FIG. 6 is an enlarged cross-sectional view of a main part showing a damper means (damper unit) in the shutter holding mechanism of the present embodiment, with the portion indicated by reference numeral [6] in FIG. In FIGS. 4 to 6, members other than the main part are omitted in order to avoid complication of the drawings. For example, FIG. 4 mainly shows the positional relationship among the front cover member 1, the slider 21, the screw 21 x, and the spherical rolling member (ball) 23. In FIG. 5, the positional relationship between the slider 21 and the pressing spring unit 11 is mainly shown. In FIG. 6, the positional relationship between the slider 21 and the damper unit 13 is mainly shown.

  The shutter holding mechanism of the present embodiment is a component for holding a focal plane type shutter unit with respect to the components constituting the camera body inside the camera body.

  Specifically, as shown in FIG. 1, for example, the shutter unit 2 is arranged in a predetermined direction (details) on the rear portion of the front cover member 1 constituting a part of the camera body via the shutter holding mechanism of the present embodiment. It is held so as to be movable only in the direction described below; An imaging unit 3 is disposed behind the shutter unit 2.

  The front cover member 1 is a part of a constituent member that constitutes a part of the camera body. The front cover member 1 is an exterior cover member formed so as to cover part of the front side and the bottom side of the camera. An opening 10 a that penetrates in a substantially circular shape is formed in a substantially central portion of the front cover member 1. On the front surface of the front cover member 1, a mount ring 10, which is a mount portion for detachably disposing a lens barrel (not shown) having an imaging optical system, is disposed on the peripheral portion of the opening 10 a. ing.

  An inner portion of the mount ring 10 is provided with an electrical contact 10b for electrically connecting a camera and a lens barrel (not shown) attached to the camera. Further, on the front surface side of the front cover member 1, various operation members such as a lens attaching / detaching button 10c are disposed on the periphery of the mount ring 10.

  Then, by attaching a lens barrel (not shown) via the mount ring 10, a subject image optically imaged by the imaging optical system of the lens barrel is disposed rearward inside the camera body. Further, an image is formed on the light receiving surface of the image pickup device 30 of the image pickup unit 3.

  Thus, the form of the camera exemplified in this embodiment is a lens interchangeable camera. Since the mechanism for attaching and detaching the front cover member 1 and the lens barrel (not shown) is a part not directly related to the present invention, it has the same configuration as that of the conventional lens interchangeable camera. The detailed description is omitted, assuming that the above is applied.

  The imaging unit 3 includes an imaging element 30 that is a photoelectric conversion element, a drive circuit that performs photoelectric conversion processing by driving the imaging element 30, and the imaging element 30 in a plane parallel to the light receiving surface. This is a constituent unit that includes a so-called blur correction mechanism for correcting image blur and the like by moving it and a drive circuit thereof. The image pickup device 30 of the image pickup unit 3 has a light receiving surface disposed toward the front side of the camera, that is, toward the opening 10 a of the front cover member 1. The image sensor 30 is arranged so that the center thereof substantially coincides with the optical axis O of a lens barrel (not shown) attached to the camera. Since the imaging unit 3 itself configured as described above is a part not directly related to the present invention, it is assumed that the same configuration as that of a camera having a conventional general configuration is applied. Description is omitted.

  The shutter unit 2 is disposed in an area between the front cover member 1 constituting a part of the camera body and the imaging unit 3 in the internal space of the camera. As described above, the shutter unit 2 can be moved only in a predetermined direction (details will be described later; traveling direction of the shutter blades) via the shutter holding mechanism of the present embodiment at the rear portion of the front cover member 1. Is held to be.

  The shutter unit 2 includes a shutter blade (light-shielding blade; not shown) that opens and closes the optical path of the imaging optical system of the lens barrel (not shown), a drive mechanism that drives the shutter blade (not shown) at an appropriate timing, and It is a structural unit configured by a shutter drive unit 20 and the like including a drive circuit and the like.

  The form of the shutter unit 2 exemplified in the present embodiment is configured by arranging shutter blades (not shown) that run parallel to the light receiving surface of the image sensor 30 in the vicinity of the front side of the image sensor 30. This is a so-called focal plane shutter unit. Since the configuration of the shutter unit 2 itself is not directly related to the present invention, it is assumed that the same configuration as that of a camera having a conventional general configuration is applied, and detailed description thereof is omitted.

  In the camera to which the shutter holding mechanism of this embodiment is applied, the traveling direction of the shutter blades (not shown) of the shutter unit 2 is a direction along the Y axis (vertical direction toward the camera). When the shutter unit 2 is driven, the shutter blades (not shown) are assumed to travel from the bottom to the top toward the camera in the normal posture state.

  Here, the detailed configuration of the shutter holding mechanism of the present embodiment will be described below with reference to FIGS.

  The shutter holding mechanism of the present embodiment is mainly configured by a slider 21, a pressing spring unit 11 as a pressing unit, a slider presser 12, a damper unit 13 as a damper unit, and the like.

  The slider 21 is a shutter substrate on which the shutter unit 2 is fixed. The slider 21 (shutter substrate) can be moved only in the direction (Y-axis direction) along the traveling direction of the shutter blades (not shown) of the shutter unit 2 by the structure described later. It is attached to the inner surface of the.

  The slider 21 is formed by bending a hard plate member such as metal. As described above, the shutter unit 2 is fixed to the slider 21. Specifically, as shown in FIGS. 1 and 2, the shutter drive unit 20 of the shutter unit 2 is fixed to one end side in the X-axis direction on the back side of the slider 21. In addition, an opening 21 a that penetrates is formed in a substantially central portion of the slider 21. A shutter blade (not shown) (not shown) is built in the vicinity of the opening 21a.

  When the shutter unit 2 is attached to the front cover member 1 via the shutter holding mechanism including the slider 21, and the imaging unit 3 is assembled at the rear thereof, the opening 21a of the slider 21 is The center of the front cover member 1 is set so as to be substantially coincident with both the center of the opening 10a of the front cover member 1 and the center of the light receiving surface of the image sensor 30. As a result, an optical path from the subject passing through the imaging optical system of the lens barrel (not shown) mounted via the mount portion 10 of the front cover member 1 and entering the camera is secured. A shutter blade (not shown) of the shutter unit 2 opens and closes the opening 21a at an appropriate timing along with the imaging operation.

  As shown in FIG. 3, the slider 21 is formed with a plurality of bent portions at both ends in the Y-axis direction when attached to the front cover member 1 (state shown in FIG. 3). Specifically, a plurality of bent portions 21d and 21e that are bent backward along the Z-axis direction are formed on one end portion side (upper end side in this example) of the slider 21. Here, two bent portions 21d are formed, and the two bent portions 21d are arranged so as to sandwich the other bent portion 21e. The plurality of bent portions 21d, 21e, and 21d are formed on the side edge on one end side (upper end side) in the Y-axis direction from the region where the opening 21a of the slider 21 is formed.

  In addition, a plurality of (two in this example) bent portions 21f are formed on the other end portion side (lower end side in this example) of the slider 21 that are bent rearward along the Z-axis direction. The two bent portions 21f are formed on the side edge portion on the other end side (lower end side) in the Y-axis direction from the region where the opening 21a of the slider 21 is formed.

  Although the details will be described later, the plurality of bent portions 21d, 21e, and 21f are portions where the pressing spring unit 11 (pressing means) and the damper unit 13 (damper means) come into contact with each other.

  Further, as shown in FIG. 3, the slider 21 is fixedly held so that the movement in the Z-axis direction is restricted by the two screws 21x and the slider presser 12 with respect to the inner surface side of the front cover member 1. Has been. Here, the slider presser 12 is fixed to the inner surface side of the front cover member 1 by two screws 12x. As shown in FIGS. 2 and 3, the slider presser 12 is formed with an arm portion 12a protruding in the X-axis direction. The arm portion 12a is formed with a spherical convex portion projecting forward. When the slider 21 is attached to the inner side surface of the front cover member 1 and the slider presser 12 is fixed to a predetermined position of the front cover member 1 by screws 12x (the state shown in FIG. 3), the slider The spherical convex portion of the arm portion 12a of the presser 12 abuts on one side edge portion (corner portion) of the plane on the back side of the slider 21 by point contact, and supports the slider 21 in the Z-axis direction. ing. At the same time, the slider 21 is formed by two screws 21x in a slot 21b drilled in the vicinity of the other side edge and a slot 21b drilled in the vicinity of the side edge near the other end. Axial movement is restricted and held fixed. Here, the long hole 21b has a long axis in the Y-axis direction. Therefore, such a configuration allows the slider 21 to move in the Y-axis direction while restricting movement in the Z-axis direction.

  In other words, in the present embodiment, screws 21x that are convex portions are provided so as to protrude from the inner surface of the front cover member 1 (camera body), and a predetermined portion of the slider 21 (shutter substrate) corresponding thereto. Is provided with an elongated hole 21b which is an opening. Here, the long hole 21b has a long axis in the Y-axis direction as described above. With this configuration, the slider 21 (shutter substrate) is moved only in the direction along the traveling direction of the shutter blades (not shown) of the shutter unit by the screws 21x (convex portions) and the elongated holes 21b (openings). It can be moved.

  In the present embodiment, an example in which a convex portion (screw 21x) is provided on the front cover member 1 side and an opening portion (long hole 21b) is provided on the slider 21 side is illustrated. It is not limited to. For example, an opening (long hole 21b) may be provided on the front cover member 1 side, and a convex part (screw 21x) may be provided on the slider 21 side. This is exactly the same as the configuration of the embodiment.

  Thus, the slider 21 is supported at three points in the Z-axis direction. In this case, the support point in the Z-axis direction is a screw in the vicinity of the other side edge portion that is a portion that is substantially opposed to the contact portion of the spherical convex portion and the position of the spherical convex portion across the opening 21a. 21x and a screw 21x in the vicinity of the other end side (lower end side) of a portion substantially opposed to these two support points across the opening 21a. That is, the slider 21 is supported in the Z-axis direction at three points that are substantially equally arranged in the circumferential direction at the peripheral edge of the opening 21a.

  Further, as shown in FIG. 4, three rolling members (balls) 23 are interposed between the slider 21 and the front cover member 1. The three rolling members 23 are also arranged substantially equally in the circumferential direction at the peripheral edge of the opening 21a, and support the slider 21 at three points from the front side.

  Further, the slider 21 is provided with two X-axis regulating portions that regulate the movement of the slider 21 in the X-axis direction in a region that is substantially at the center and is out of the opening 21a. In this X-axis restricting portion, the movement of the slider 21 in the X-axis direction is restricted, and at the same time, the slider 21 is allowed to move in the Y-axis direction, and the roller 21 is rotatable in order to smoothly move the slider 21. The slider 21 is fixedly held with respect to the front cover member 1 by using screws 22x with 22 interposed (two locations).

  For this purpose, the roller 22 is accommodated in each opening formed in the slider 21. These openings are formed with a long axis in a direction (Y-axis direction) along the traveling direction of a shutter blade (not shown). The width dimension of the opening is substantially the same as or slightly wider than the diameter of the roller 22. Thereby, the roller 22 allows the slider 21 to move in the Y-axis direction while restricting the movement of the slider 21 in the X-axis direction, and can smoothly move the slider 21.

  The pressing spring unit 11 is pressing means that presses the shutter substrate 21 against the front cover member 1 toward the other end of the shutter substrate 21. For this purpose, the pressing spring unit 11 is fixed to the inner side surface of the front cover member 1 constituting a part of the camera body using screws 11x. Here, the said press spring unit 11 is arrange | positioned in the position facing the one side edge part of the one end part side (upper end side) of the slider 21 (shutter board | substrate).

  Here, the detailed configuration of the pressing spring unit 11 will be described. As shown in FIG. 5, the pressing spring unit 11 includes a base portion 11b formed by bending a hard plate member such as metal, and a plurality of (in this example, two, for example, coil springs). ) Biasing member 11d and elastic buffer member 11e.

  The base portion 11b is formed to have two arm portions 11a in which screw holes 11c for attaching the pressing spring unit 11 to the front cover member 1 are formed. Energizing members 11d are disposed at both ends of the base 11b. The two urging members 11d face the two bent portions 21d and 21d of the slider 21 when the pressing spring unit 11 is attached to the front cover member 1 (the state shown in FIG. 3). It is fixed at the position on the base part 11b side. At this time, the front end sides of the two urging members 11d are in contact with the opposing surfaces of the two bent portions 21d and 21d, respectively.

  In addition, a buffer member 11e is disposed in the middle portion of the base portion 11b by, for example, sticking with a double-sided tape or the like. Here, the buffer member 11e is bent at a position facing the bent portion 21e of the slider 21 when the pressing spring unit 11 is attached to the front cover member 1 (the state shown in FIG. 3). It is fixed to the base part 11b side with a gap (with a space) between the part 21e. Here, a gap between the outer edge of the slider 21 at one end (upper end) and the buffer member 11e of the pressing spring unit 11 is provided to allow the slider 21 to move in the Y-axis direction. Yes.

  On the other hand, the damper unit 13 is damper means for absorbing movement vibration of the slider 21 (shutter substrate) pressed by the pressing spring unit 11 (pressing means). Therefore, the damper unit 13 is fixed to the inner side surface of the front cover member 1 constituting a part of the camera body using screws 13x. Here, the damper unit 13 is in a direction along the traveling direction of the shutter blades (not shown) of the shutter unit 2 (Y-axis direction) with respect to the portion where the pressing spring unit 11 (pressing means) is disposed. Is disposed at a position opposite to a predetermined portion on the opposite side, that is, one side edge of the other end (lower end) of the slider 21 (shutter substrate). In the present embodiment, an example in which a plurality (two) of the damper units 13 are arranged is shown.

  Here, a detailed configuration of the damper unit 13 will be described. As shown in FIG. 6, the damper unit 13 includes a substrate 13a having a bent portion 13b, an elastic member 13d, a cylinder 13c, a cover screw 13e, and the like.

  The substrate 13a is a main component formed by bending a hard plate-like member such as metal. The board 13a is formed with a bent portion 13b that is bent rearward along the Z-axis direction. The bent portion 13b is disposed at a position facing the bent portion 21f on the other end side (lower end side) of the slider 21 when the damper unit 13 is attached to a predetermined portion of the front cover member 1. . Further, the bent portion 13b is provided with a through hole into which a cylindrical portion of a cylinder 13c described later is inserted.

  The elastic member 13d is a member having elasticity such as a coil spring. The elastic member 13d is arranged in a state of being wound on the outer peripheral surface of the cylinder 13c when the damper unit 13 is assembled, and as will be described later, the inner surface of the flange portion and the bent portion of the cylinder 13c. It is arrange | positioned so that expansion-contraction is possible between the inner surfaces of 13b.

  The cylinder 13c includes a flange portion having a receiving portion which is a surface for receiving a bent portion 21f on the other end side (lower end side) of the slider 21 (shutter substrate) pressed by the pressing spring unit 11 (pressing means), and It is a 1st cylinder member formed by having the cylindrical part which winds and arrange | positions the elastic member 13d. The flange portion of the cylinder 13c is formed at one end of the cylindrical portion.

  When the damper unit 13 is in an assembled state, the other end of the cylindrical portion of the cylinder 13c is inserted into the through hole of the bent portion 13b of the substrate 13a. In this state, the elastic member 13d is wound around the cylindrical portion of the cylinder 13c. At this time, one end of the elastic member 13d is in contact with the inner surface of the flange portion of the cylinder 13c (the surface on the opposite side (back surface side) from the receiving portion). The other end of the elastic member 13d is in contact with the inner surface of the bent portion 13b of the substrate 13a. Accordingly, as described above, the elastic member 13d is disposed so as to be stretchable between the inner side surface of the flange portion (receiving portion) of the cylinder 13c and the inner side surface of the bent portion 13b.

  The cover screw 13e has a cylindrical portion that engages with the other end of the cylindrical portion of the cylinder 13c (first cylindrical member) and a second flange portion that is formed at one end of the cylindrical portion. It is a cylindrical member. When the damper unit 13 is in an assembled state, the cylindrical portion of the lid screw 13e is engaged with the other end of the cylinder 13c that is inserted through the through hole formed in the bent portion 13b of the substrate 13a. Are placed together. At this time, the inner surface of the flange portion of the cover screw 13e is in contact with the bent portion 13b of the substrate 13a. Thereby, the flange part of the lid screw 13e functions as a positioning part for positioning the slider 21 with respect to the camera body.

  In the damper unit 13 configured as described above, the substrate 13a having the bent portion 13b is fixed to the inner side surface of the front cover member 1 (camera body) using screws 13x. The cylinder 13c and the cover screw 13e are integrally provided on the substrate 13a. At this time, the elastic member 13d is disposed so as to be stretchable between the inner surface of the flange portion (receiving portion) of the cylinder 13c and the inner surface of the bent portion 13b. In other words, the elastic member 13d is disposed between the flange portion (receiving portion) of the cylinder 13c and the camera body (the bent portion 13b of the substrate 13a fixed to the camera body).

  With this configuration, when the flange portion (receiving portion) of the cylinder 13c receives the other end portion side (the bent portion 21f) of the slider 21 (shutter substrate), the front cover member 1 (camera body) is not affected. The cylinder 13c and the cover screw 13e move in a direction along the Y-axis direction (the traveling direction of the shutter blades of the shutter unit). Here, the cylinder 13c and the cover screw 13e are moving members that are integrally formed and moved by engaging as described above.

  When the shutter holding mechanism of the present embodiment is in the normal state, as described above, the bent portion 21f (shutter substrate) of the slider 21 is in contact with the flange portion (the receiving portion) of the cylinder 13c. . That is, at this time, the slider 21 is placed on the flange portion (the receiving portion) of the cylinder 13c by its own weight.

  In this state, when the shutter unit is driven and the shutter blade (not shown) travels from one end side (lower end side) to the other end side (upper end side) of the slider 21 in the Y-axis direction, In response to the force or the like, the slider 21 on which the shutter unit is placed moves in the direction opposite to the traveling direction of the shutter blades. Then, in response to this, the moving member (an integrated component of the cylinder 13c and the cover screw 13e) also moves in the same direction. Accordingly, at this time, the elastic member 13d extends in the direction along the traveling direction of the shutter blades (not shown) of the shutter unit in the Y-axis direction. At the same time, the bent portion 21e of the slider 21 comes into contact with the buffer member 11e. Thereby, the elastic member 13d and the buffer member 11e absorb the moving vibration of the slider 21.

  On the other hand, depending on the external force received at this time, the slider 21 may move in the same direction as the traveling direction of the shutter blades. In this case, the moving member (an integrated component of the cylinder 13c and the cover screw 13e) moves in the same direction. At this time, the elastic member 13d contracts in the direction along the traveling direction of the shutter blades (not shown) of the shutter unit in the Y-axis direction. Accordingly, the elastic member 13d absorbs the movement vibration of the slider 21.

  Thus, the damper unit 13 (damper means) is configured such that the moving member (13c, 13e) moves in the Y-axis direction along the traveling direction of the shutter blades to expand and contract the elastic member 13d, thereby moving the slider 21 (shutter 21). The moving vibration of the substrate) relative to the front cover member 1 (camera body) is absorbed.

  As described above, according to the above-described embodiment, the slider 21 (shutter substrate) on which the focal plane type shutter unit is fixed is moved with respect to the front cover member 1 (camera body) in the traveling direction of the shutter blades (Y-axis). The slider 21 is movably held only in the direction along the direction), and the pressing spring unit 11 and the damper unit 13 are provided at one end and the other end in the Y-axis direction of the slider 21 so as to absorb the movement vibration of the slider 21. Configured.

  Therefore, with such a configuration, the slider 21 (shutter substrate) on which the shutter unit is fixed can be moved in the travel direction (Y-axis direction) of the shutter blades by the pressing spring unit 11 and the damper unit 13, and is usually In a state, it can be set as the structure which is always hold | maintained in the stable state.

  Further, the slider 21 is moved together with the shutter unit by the reaction force of the shutter blades when the shutter unit is driven, and the vibration transmitted to the camera body side is absorbed by the pressing spring unit 11 and the damper unit 13 by absorbing the movement vibration. Can be reduced and suppressed. Accordingly, it is possible to reduce vibrations of the camera body, the imaging unit, and the like that are generated when the shutter unit is driven, and thus it is possible to suppress the occurrence of image blur and the like, so that a good imaging result can always be obtained.

  Further, the slider 21 is restricted in movement in the X-axis direction by the roller 22, and the movement in the Z-axis direction is restricted by the two screws 21 x (convex portion) and the long hole 21 b (opening), while in the Y-axis direction. It is set as the structure hold | maintained with respect to the front cover member 1 so that only the movement of this is permitted.

  Therefore, with such a configuration, the slider 21 having the shutter unit fixed thereon can be moved only in one direction of a desired rule, that is, in the Y-axis direction that is the traveling direction of the shutter blades. The stability of the position of the unit can be ensured.

  In the present embodiment, as an example of a camera to which the shutter holding mechanism is applied, an interchangeable lens camera body is described as an example. However, the present invention is not limited to this embodiment, and for example, a lens barrel is used. It is possible to apply the shutter holding mechanism of the present invention in the same manner even when the camera is fixed to the front surface of the camera body.

  Further, the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications and applications can be implemented without departing from the spirit of the invention. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment, if the problem to be solved by the invention can be solved and the effect of the invention can be obtained, this constituent requirement is deleted. The configured structure can be extracted as an invention. Furthermore, constituent elements over different embodiments may be appropriately combined.

1 …… Front cover member,
2 …… Shutter unit,
3 …… Imaging unit,
10 ... Mount ring, 10a ... Opening, 10b ... Electric contact, 10c ... Lens attachment / detachment button,
11... Pressing spring unit, 11 a... Arm part, 11 b... Base part, 11 c .. screw hole, 11 d .. biasing member, 11 e.
12 ... Slider press, 12a ... Arm, 12x ... Screw,
13 ... Damper unit, 13a ... Substrate, 13b ... Bending part, 13c ... Cylinder, 13d ... Elastic member, 13e ... Cover screw, 13x ... Screw,
20 …… Shutter drive unit,
21... Slider, 21 a... Opening, 21 b... Elongated hole, 21 d, 21 e, 21 f.
22 ... Roller, 22x ... Screw,
23 …… Rolling member,
30 …… Image sensor,
O: Optical axis,

In order to achieve the above object, a shutter holding mechanism of one embodiment of the present invention includes a shutter substrate provided in a camera body to which a focal plane shutter unit is fixed, the camera body, and one end side of the shutter substrate. An urging member that presses the shutter substrate toward the other end of the shutter substrate with respect to the camera body, and a buffer member that absorbs the movement vibration of the shutter substrate. A pressing spring unit and a direction of the camera body corresponding to the other end side of the shutter substrate in the direction along the traveling direction of the shutter blades of the shutter unit and opposite to the portion where the pressing spring unit is disposed. is disposed at the site, a damper means for absorbing movement of the pressed the shutter board by the pressing spring unit A holding portion for holding the shutter board with respect to the camera body, while restricting the movement in the optical axis direction of the shutter board, only in the direction in which the shutter board along the running direction of the shutter blades of the shutter unit A restricting part that restricts movement, and the shutter substrate is restricted by the holding part from moving in a direction perpendicular to a direction along the traveling direction of the shutter blades, and is controlled by the restricting part in the optical axis direction. The movement of the shutter unit is restricted, and the camera body is arranged to be movable only in the direction along the traveling direction of the shutter blades of the shutter unit.

In this state, the shutter blade shutter unit is driven (not shown) is Y-axis direction and from the other end side of the slider 21 (lower end side) travels toward the one end side (upper end side), the running In response to the reaction force, the slider 21 on which the shutter unit is placed moves in a direction opposite to the traveling direction of the shutter blades. Then, in response to this, the moving member (an integrated component of the cylinder 13c and the cover screw 13e) also moves in the same direction ( the direction opposite to the traveling direction of the shutter blades) . Accordingly, at this time, the elastic member 13d contracts in the direction opposite to the traveling direction of the shutter blades (not shown) of the shutter unit in the Y-axis direction . By this, the elastic member 13 d absorbs movement oscillation of the slider 21.

On the other hand, depending on the external force received at this time, the slider 21 may move in the same direction as the traveling direction of the shutter blades. In this case, the moving member (an integrated component of the cylinder 13c and the cover screw 13e) moves in the same direction. Then, the bent portion 21e of the slider 21 comes into contact with the buffer member 11e. At this time, the elastic member 13d extends in the traveling direction of the shutter blades (not shown) of the shutter unit in the Y-axis direction. Thereby, the elastic member 13d and the buffer member 11e absorb the moving vibration of the slider 21.

Claims (6)

A shutter substrate provided in the camera body and fixed with a focal plane shutter unit;
A pressing means disposed between the camera body and one end side of the shutter substrate, and pressing the shutter substrate toward the other end side of the shutter substrate against the camera body;
The shutter unit is disposed in a portion on the camera body side corresponding to the other end portion side of the shutter substrate on the opposite side to the portion where the pressing means is disposed, in the direction along the traveling direction of the shutter blades of the shutter unit. Damper means for absorbing the movement of the shutter substrate pressed by the means;
Comprising
The shutter holding mechanism, wherein the shutter substrate is disposed on the camera body so as to be movable only in a direction along a traveling direction of the shutter blades of the shutter unit.   2. The shutter holding mechanism according to claim 1, wherein the damper means expands and contracts in a direction along the traveling direction of the shutter blades of the shutter unit to absorb the vibration of the shutter substrate with respect to the camera body. A convex portion disposed on one of the shutter substrate or the camera body;
An opening disposed on the other side of the shutter substrate or the camera body;
Further comprising
The shutter holding mechanism according to claim 1, wherein the shutter substrate is arranged to be movable only in a direction along a traveling direction of the shutter blades of the shutter unit by the convex portion and the opening. . The damper means is
A receiving portion that receives the other end of the shutter substrate pressed by the pressing means, and a positioning portion that is positioned with respect to the camera body,
A moving member that moves in a direction along the traveling direction of the shutter blades of the shutter unit with respect to the camera body when the receiving portion receives the other end of the shutter substrate;
An elastic member disposed between the receiving portion and the camera body;
The shutter holding mechanism according to claim 1, further comprising: The moving member is
A first cylindrical member, wherein the receiving portion is formed in a flange shape, one end portion of the elastic member is in contact with the camera body, and the other end portion of the elastic member is received on the side opposite to the receiving portion;
A second cylindrical member that is formed in a flange shape and engages with the first cylindrical member;
The shutter holding mechanism according to claim 4, comprising:   The shutter holding mechanism according to claim 1, wherein the shutter blade of the shutter unit travels from one end side where the pressing means is disposed to the other end side on the shutter substrate.

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