JP5569287B2 - Camera movable mirror shock absorption mechanism - Google Patents

Description

  The present invention relates to a drive device for a movable mirror provided in a single-lens reflex camera, and more particularly to an impact absorbing mechanism for the movable mirror.

  Inside the single-lens reflex camera, a finder light guide position (down position) that is inserted in the photographic optical path and reflects the subject light to the finder optical system, and a retracted position that evacuates from the photographic optical path and passes the subject light to the shutter side. A movable mirror (quick return mirror) that can be turned up and down is provided at (up position). If the movable mirror bounces (vibrates) due to an impact when rotating to the finder light guide position and the retracted position, the observation image of the finder is not stable and adversely affects the observation performance. Also, with a camera that uses a movable mirror to direct the subject light to a distance measuring sensor or a photometric sensor, accurate distance measurement or photometry cannot be performed while the movable mirror is bouncing. Copy performance is limited. For this reason, there has been proposed an impact absorbing mechanism that absorbs an impact when the movable mirror rotates and suppresses a bounce.

JP 2000-131755 A

  An object of the present invention is to provide a movable mirror shock absorbing mechanism that has a simple and compact configuration and is excellent in shock absorbing performance when the movable mirror rotates.

  The first aspect of the present invention includes a finder light guide position that is positioned on the photographing optical path and reflects the subject light to the observation optical system, and a retreat position that is retracted from the photographing optical path and allows the subject light to pass to the imaging light receiving medium side. The movable mirror shock absorbing mechanism of the camera that absorbs shock to the movable mirror that is rotatably supported between the movable mirror and the movable mirror when the movable mirror rotates from the finder light guide position to the retracted position. A first mirror retracting buffer member that is pressed and moved; the first mirror retracting buffer member is supported so as to be relatively movable, and when the movable mirror rotates from the finder light guide position to the retracted position, first A second mirror retracting buffer member that moves the mirror retracting buffer member alone in the pressing direction by the movable mirror and then moves in the pressing direction together with the first mirror retracting buffer member; An urging means for urging and moving the member and the second mirror retracting buffer member in a direction opposite to the pressing movement direction by the movable mirror; and the first mirror retracting buffer member and the first mirror by the movable mirror rotating to the retracted position. When the second mirror retracting buffer member is pressed and moved in the direction opposite to the biasing direction of the biasing means, the movement of the first mirror retracting buffer member and the second mirror retracting buffer member in the biasing direction is restricted. Holding means;

  The holding means includes a mirror advance buffer member that absorbs shock when the movable mirror rotates from the retracted position to the finder light guide position, and an interlocking lock member that operates in conjunction with the second mirror retract buffer member. It is preferable. Specifically, when the movable mirror is in the retracted position, the mirror advance buffer member is held at a movement restriction position that restricts the movement of the second mirror retracting buffer member in the biasing direction of the biasing means. Is moved from the retracted position to the viewfinder light guide position, it is brought into contact with the movable mirror and is pressed and moved from the movement restricting position to absorb the impact on the movable mirror and to cancel the movement restriction on the second mirror retracting buffer member. . The interlock lock member is a lock that restricts the relative movement of the first mirror retracting buffer member with respect to the second mirror retracting buffer member when the second mirror retracting buffer member is in a position to be restricted by the mirror advancement buffer member. The second mirror retracting buffer member held in the position moves in the biasing direction of the biasing means without being restricted by the movement of the mirror advance buffer member, so that the first mirror retracting buffer member with respect to the second mirror retracting buffer member is moved. The mirror retracting buffer member is moved to an unlock position that allows relative movement.

  Each of the first mirror retracting buffer member and the second mirror retracting buffer member can be configured as a rectilinearly moving member that can linearly move in a substantially parallel manner along a plane substantially orthogonal to the rotation axis of the movable mirror. Further, the interlocking lock member can be configured as a rotation member that can rotate around a rotation axis that is substantially parallel to the rotation axis of the movable mirror. In this configuration, when the interlocking lock member is in the locked position, the radial protrusion provided on the interlocking lock member is positioned on the movement locus of the restricted portion provided on the first mirror retracting buffer member, and The movement of the first mirror retracting buffer member in the urging direction of the urging means is restricted by the contact between the radial protrusion and the restricted portion. When the interlocking lock member is in the unlock position, the radially projecting portion is retracted from the movement locus of the restricted portion to allow the first mirror retracting buffer member to move in the biasing direction of the biasing means.

  The first mirror retracting buffer member and the second mirror retracting buffer member are supported on the side of a mirror box that supports the movable mirror therein, and the first mirror retracting buffer member and the second mirror retracting buffer are supported. As a biasing means for biasing the member, a first spring that engages with the mirror box and the first mirror retracting buffer member, and a second spring that engages with the mirror box and the second mirror retracting buffer member are provided. Good.

  The mirror advance buffer member can be configured as a rotation member that can rotate around a rotation axis that is substantially parallel to the rotation of the movable mirror. In this case, a rotation urging member that urges the mirror advancement buffer member to move to a movement limit position with respect to the second mirror retracting buffer member is provided, and this rotation is performed when the movable mirror rotates to the finder light guide position. The mirror advancement buffer member may be pressed against the urging force of the urging member.

  The second mirror retracting buffer member is preferably configured to restrict and release the rotation of the mirror advance buffer member in accordance with the movement. Specifically, a locking portion that contacts the fixed member and determines a moving end of the second mirror retracting buffer member in the urging direction by the urging means, and a moving end that makes the locking portion contact the fixed member When the second mirror retracting buffer member is positioned on the second mirror, the second mirror is provided with a rotation restricting portion that advances on the rotation locus of the mirror advancement buffer member and restricts the rotation of the mirror advancement buffer member to the movement restriction position. It is good to prepare for a retraction buffer member. The rotation restricting portion rotates the mirror advancement buffer member by pressing and moving the second mirror retracting buffer member together with the first mirror retracting buffer member in the direction opposite to the biasing direction of the biasing means by the movable mirror. Retreat from the trajectory and allow its rotation. In this case, the mirror advancing buffer member includes a rotation restricting surface that abuts against the rotation restricting portion of the second mirror retracting shock absorbing member and receives the rotation restriction to the movement restricting position, and is outside the rotation restricting surface. Positioned on the radial side, when the mirror advancement buffer member is in the movement restriction position, it contacts the second mirror retracting buffer member and restricts the movement of the second mirror retracting buffer member in the biasing direction of the biasing means. However, it is preferable to form a rotation allowing surface that allows the mirror advancement buffer member to rotate.

  The second aspect of the present invention includes a finder light guide position that is located on the photographing optical path and reflects the subject light to the observation optical system, and a retreat position that is retracted from the photographing optical path and allows the subject light to pass to the imaging light receiving medium side. Is a movable mirror shock absorbing mechanism of a camera that absorbs shock to a movable mirror that is rotatably supported between the finder and a movable mirror that rotates in one direction between the finder light guide position and the retracted position. A first buffer member that is pressed and moved in contact with the movable mirror; the first buffer member is supported so as to be relatively movable, and when the movable mirror rotates in the one direction, the first buffer member is first A second buffer member that is moved independently in the pressing direction by the movable mirror and then moved in the pressing direction together with the first buffer member; the first buffer member and the second buffer member are respectively opposite to the pressing movement direction by the movable mirror Move in direction Urging means for urging; and when the first buffer member and the second buffer member are pressed and moved in the direction opposite to the urging direction of the urging means by the movable mirror, the first buffer member and the second buffer member in the urging direction And 2 holding means for restricting movement of the buffer member.

  The holding means of this aspect is a third buffer that absorbs shock with respect to the rotation of the movable mirror in the direction opposite to the one rotation direction that is absorbed by the first buffer member and the second buffer member. It is preferable to configure the member and an interlocking lock member that operates in conjunction with the second buffer member. Specifically, the third buffer member is configured to move the second buffer in the biasing direction of the biasing means when the movable mirror rotates in the one direction and presses and moves the first buffer member and the second buffer member. When the movable mirror is held in a movement restriction position that restricts the movement of the buffer member and rotates in the direction opposite to the one direction, the movable mirror abuts against the movable mirror and is pressed and moved from the movement restriction position to absorb the shock to the movable mirror. And the movement restriction on the second buffer member is released. The interlocking lock member is held at a lock position that restricts the relative movement of the first buffer member with respect to the second buffer member when the second buffer member is in a position subject to movement restriction by the third buffer member. However, by moving in the urging direction of the urging means without being restricted by movement by the third buffer member, the first buffer member is moved to the unlock position that allows relative movement of the first buffer member.

  According to the first aspect of the present invention, when the movable mirror rotates from the finder light guide position to the retracted position, the first mirror retracting buffer member is first pressed and moved, and then the first mirror retracted. Since the second mirror retracting buffering member that supports the buffering member is pressed and moved together, it is possible to secure a long state in which the shock absorbing member acts on the movable mirror while keeping the space for moving the buffering member small. Can do. Further, in a state where the movable mirror is rotated to the retracted position, the bounce operation of the first mirror retracting buffer member and the second mirror retracting buffer member is suppressed by the holding means. Thereby, it is possible to obtain a movable mirror impact absorbing mechanism that is excellent in impact absorbability when the movable mirror is rotated from the finder light guide position to the retracted position while having a compact configuration. Moreover, it is easy to set the urging force to the first mirror retracting buffer member and the second mirror retracting buffer member individually to give an optimum load to the movable mirror, and the degree of freedom in setting the shock absorbing performance is high. .

  In addition, the holding means for the first mirror retracting buffer member and the second mirror retracting buffer member are connected to the first mirror retracting buffer member in conjunction with the movement of the second mirror retracting buffer member. An interlocking lock member that restricts and allows relative movement of the member, and a mirror advance that releases the movement limitation of the second mirror retracting buffer member while absorbing shock when the movable mirror rotates from the retracted position to the finder light guide position By comprising with a buffer member, it can be set as a simple holding means with few number of parts.

  In addition, contrary to when the movable mirror rotates to the retracted position, when the movable mirror rotates to the finder light guide position, the second mirror retracting buffer member restricts the rotation of the mirror advance buffer member. Therefore, the configuration can be further simplified.

  The technical idea of the present invention can be applied to the case where the movable mirror rotates in any direction. According to the second aspect, the rotation direction of the movable mirror is reversed from that of the first aspect. The same effect can be obtained.

It is a figure which shows the outline of the optical system of the single-lens reflex camera to which this invention is applied. It is a front perspective view of the mirror box in a mirror down state. It is a front perspective view of the mirror box in a mirror up state. It is a back perspective view of a mirror box in a mirror down state. It is a back perspective view of a mirror box in a mirror down state. It is a back perspective view of a mirror box in a mirror up state. It is a perspective view of the mirror buffer mechanism in a state where the contact portion of the mirror sheet is in contact with the buffer dowel of the down absorption lever. It is a perspective view of the mirror buffer mechanism in a state where the contact portion of the mirror sheet is in contact with the buffer dowel of the up-absorbing lever. It is a left view of the mirror box of a state where the presser plate is removed and the mirror buffer mechanism is exposed. It is a side view of the mirror buffer mechanism in the mirror-down state. It is a side view of the mirror buffer mechanism in a state in which the movable mirror is rotating from the down position to the up position. It is a side view of the mirror buffer mechanism in a state in which the movable mirror is rotating from the down position to the up position. It is a side view of the mirror buffer mechanism in the mirror up state. It is a side view of the mirror buffer mechanism in a state where the release lever is subjected to movement restriction by the down absorption lever and the up absorption lever is restricted from movement by the lock lever. FIG. 10 is a side view of the mirror buffer mechanism in a state where the movable mirror completes the rotation from the up position to the down position, and the down absorption lever is rotated to the over position before the rotation restriction position by the up absorption lever.

  A single-lens reflex camera (hereinafter referred to as a camera) 10 shown in FIG. 1 has a lens mount 13 for attaching and detaching an interchangeable lens barrel 12 on the front surface of a camera body 11, and a mirror box 14 is provided on the inside thereof. .

  A movable mirror (quick return mirror) 15 is provided in the mirror box 14. The movable mirror 15 has a structure in which the main mirror 15 a is fixedly supported on the mirror sheet 16, and the sub mirror 17 is rotatably supported on the back side of the mirror sheet 16, and protrudes on both sides of the mirror sheet 16. A pair of mirror sheet hinges 16 x are pivotally supported on both side walls of the mirror box 14. A focal plane shutter (hereinafter referred to as shutter) 18 is provided behind the movable mirror 15, and an image sensor (imaging light receiving medium) 19 is provided behind the shutter 18. Note that the camera 10 of the present embodiment is a digital camera that uses the image sensor 19 as an imaging light-receiving medium, but the present invention can also be applied to a camera that uses a silver salt film as the imaging light-receiving medium.

  The movable mirror 15 is inclined down at an angle of about 45 degrees on the photographing optical path from the photographing lens 12a in the lens barrel 12 to the image sensor 19 with the mirror sheet hinge 16x as an axis (finder light guide position: 1 between the solid line in FIG. 1, FIG. 2, FIG. 4, FIG. 5, and FIG. 10) and the up position retracted upward from the imaging optical path (retracted position: two-dot chain line in FIG. 1, FIG. 3, FIG. Is reciprocally rotated. As shown in FIGS. 4 and 6, a down positioning dowel 20 protrudes from the inner surface of one of both side walls of the mirror box 14 positioned with the movable mirror 15 interposed therebetween. The mirror sheet 16 is opposed to the down positioning dowel 20. The down position of the movable mirror 15 is determined by abutting a stopper portion 16a (FIGS. 7 and 8) provided on one side portion of the movable mirror 15. The down positioning dowel 20 can finely adjust the mounting position with respect to the mirror box 14. Also, an upper stopper 21 is provided in the mirror box 14 so that the upper surface of the mirror sheet 16 can come into contact when the movable mirror 15 is rotated to the up position. A finder optical system 22 composed of a pentaprism, an eyepiece, or the like is provided above the movable mirror 15.

  When the movable mirror 15 is in the down position, subject light that enters the mirror box 14 through the photographing lens 12a in the lens barrel 12 with the lens barrel 12 mounted on the lens mount 13 is the main mirror of the movable mirror 15. The object image can be observed through the finder window 22a on the rear side of the camera body 11 after being reflected by the lens 15a and entering the finder optical system 22. In this state, photometry can be performed by the photometry unit 23 provided behind the pentaprism constituting the finder optical system 22. In the down position of the movable mirror 15, the sub mirror 17 protrudes obliquely downward with respect to the mirror sheet 16, and part of the subject light is guided to the distance measuring unit 24 below the mirror box 14 by the sub mirror 17, The distance can be detected. On the other hand, when the movable mirror 15 is in the up position, the subject light incident into the mirror box 14 through the photographing lens 12a is not reflected by the movable mirror 15 but proceeds to the shutter 18 side, and the shutter 18 is opened to open the image sensor 19. Light can be incident on the light receiving surface. At the up position of the movable mirror 15, the sub mirror 17 is stored on the back side of the mirror sheet 16. The LCD monitor 25 provided on the rear surface of the camera body 11 can display an electronic image of the subject obtained by the image sensor 19 and various types of information other than the electronic image.

  As shown in FIGS. 3 and 5, a mirror drive mechanism 30 that moves the movable mirror 15 up and down is provided on one side (the left side when viewed from the front) of the mirror box 14. The mirror drive mechanism 30 includes a motor 31, a reduction gear train 32 that transmits a drive force of the motor 31, a cam gear 33 that receives a rotational drive force from the reduction gear train 32 via a planetary gear mechanism, and a cam gear 33. A mirror drive lever 34 whose rotation position is controlled is provided. The mirror drive lever 34 is supported by the mirror box 14 so as to be reciprocally rotatable about an axis 34x substantially parallel to the axis of the mirror sheet hinge 16x, and holds a mirror sheet boss 16b provided on the side of the mirror sheet 16. doing. The holding portion by the mirror driving lever 34 presses the mirror sheet boss 16b downward to rotate the movable mirror 15 toward the down position, and presses the mirror sheet boss 16b upward to move the movable mirror 15 to the up position. Rotate toward The mirror drive lever 34 is urged to rotate in a direction to press the movable mirror 15 to the down position, and when the cam gear 33 is in a specific rotation position, a mirror control cam (peripheral cam) formed on the cam gear 33. Thus, the mirror drive lever 34 is pressed and rotated in the mirror up direction against the urging force. Specifically, the cam gear 33 is a one-rotation cam gear that is rotated only in one direction from the initial position. When the cam gear 33 is in the initial position, the mirror control cam of the cam gear 33 does not press the mirror drive lever 34, and the mirror drive. The movable mirror 15 is held in the down position by the urging force acting on the lever 34. When the cam gear 33 is rotated from the initial position to the middle, the mirror control cam of the cam gear 33 presses and rotates the mirror drive lever 34, and the mirror drive lever 34 rotates the movable mirror 15 to the up position. From this midway position until the cam gear 33 returns to the initial position, the mirror control cam of the cam gear 33 releases the pressure on the mirror drive lever 34, and the movable mirror 15 is returned to the down position.

  A shutter charge lever 35 for charging the shutter 18 is further provided on one side of the mirror box 14. The cam gear 33 has a shutter charge cam that controls the operation of the shutter charge lever 35 in addition to the above-described mirror drive cam, and rotates the shutter charge lever 35 reciprocally by rotating once from the initial position to charge the shutter. Let it be done. Since the shutter charge mechanism is not related to the features of the present invention, detailed description thereof is omitted.

  The other side of the mirror box 14 (the side on the right side when viewed from the front) absorbs an impact when the movable mirror 15 rotates to the down position and the up position, thereby suppressing the bounce (vibration) of the movable mirror 15. A mirror buffer mechanism (movable mirror shock absorbing mechanism) 40 is provided. The mirror buffer mechanism 40 includes a down absorption lever (holding means, a mirror advance buffer member, a third buffer member) 41, a down absorption spring (a rotation biasing member) 42, a release lever (second mirror retract buffer member, second buffer member). Buffer member) 43, release spring (biasing means, second spring) 44, up absorption lever (first mirror retracting buffer member, first buffer member) 45, up absorption spring (biasing means, first spring) ) 46 and a lock lever (holding means, interlocking lock member) 47, and these members are held so as not to drop off by a pressing plate 48 (FIG. 4) fixed to the side of the mirror box 14.

  The down-absorbing lever 41 protrudes from the mirror box 14 and is rotatably supported by a shaft 41x substantially parallel to the mirror seat hinge 16x. The down absorption lever 41 has a substantially sector shape centered on the shaft 41x, and has a buffering dowel 41a protruding toward the inner side of the mirror box 14 at a position close to the peripheral edge of the fan, and a portion close to the shaft 41x Has a rotation restricting surface 41b extending in the radial direction. Further, following the rotation restricting surface 41b, a rotation permitting surface 41c is formed which is positioned on the outer diameter side of the rotation restricting surface 41b and has an arc shape centering on the shaft 41x. The mirror box 14 is formed with an arc-shaped through hole 14a centering on an axis 41x, and the buffer dowel 41a of the down absorption lever 41 is inserted into the through hole 14a and protrudes into the mirror box 14. (See FIG. 2, FIG. 3, FIG. 5 and FIG. 9). The buffer dowel 41a is located on the movement locus of the buffer contact portion 16c provided on the side portion near the front end portion of the mirror sheet 16 (on the rotation locus of the movable mirror 15 around the mirror sheet hinge 16x). Thus, it is possible to contact the lower surface side of the buffer contact portion 16c.

  The down absorption spring 42 is associated with a coil portion 42 a surrounding the shaft 41 x, a spring arm portion 42 b that engages with a spring hook portion 14 b formed on the side surface of the mirror box 14, and a spring hook portion 41 d formed on the down absorption lever 41. This is a torsion spring having a mating spring arm portion 42c, and urges the down absorption lever 41 to rotate clockwise in FIGS. The urging direction of the down-absorbing lever 41 by the down-absorbing spring 42 is a direction in which the buffer dowel 41a approaches (contacts) the buffer contact portion 16c of the mirror sheet 16, and the urging direction of the down-absorbing lever 41 is reduced. A rotation restricting protrusion 14 c that defines the rotation end of the absorption lever 41 is provided on the side surface of the mirror box 14. The rotation end of the down-absorbing lever 41 in contact with the rotation restricting protrusion 14c is referred to as a buffer standby position (movement limit position with respect to the release lever 43). The down absorption lever 41 can rotate in a direction away from the rotation restricting projection 14c against the urging force of the down absorption spring 42 with the buffer standby position as one rotation end. The down absorption lever 41 is pressed by the buffer contact portion 16c of the movable mirror 15 (mirror sheet 16) rotating in the down position direction from the buffer standby position shown in FIGS. 13 and 14 to a predetermined position. It is rotated against the urging force of the down absorption spring 42. This predetermined position is a position corresponding to the down position of the movable mirror 15. When the movable mirror 15 reaches the down position, the stopper portion 16a abuts on the down positioning dowel 20 and further rotation is restricted. Therefore, the pressing force from the buffer contact portion 16c does not reach the down absorption lever 41 any more. The rotation range of the down absorption lever 41 that receives the pressing movement force by the movable mirror 15 is called a buffer movement area. The down absorption lever 41 is further rotatable to an over movement area ahead of the buffer movement area. 10, 11, 12, and 15 show a state in which the down absorption lever 41 is in the over movement range, and the movable mirror 15 contacts the down positioning dowel 20 and rotates beyond the down position. However, the down absorption lever 41 separates the buffer dowel 41a from the buffer contact portion 16c of the mirror sheet 16, and the contact relationship with the movable mirror 15 is released. .

  The release lever 43 has two guide holes 43a and guide holes (locking portions) 43b through which the upper and lower two guide pins 14d and a guide pin (fixing member) 14e project from the side surface of the mirror box 14, By being guided by the guide pins 14d and 14e through the guide holes 43a and 43b, the guide holes 43a and 43b are supported so as to be linearly movable in the vertical direction. The rectilinear movement direction of the release lever 43 is set in a plane substantially orthogonal to the axis of the rotation shaft 41x of the down absorption lever 41. In other words, the down absorption lever 41 and the release lever 43 are supported so as to be rotatable and movable along planes parallel to each other. A rotation restricting arm (rotation restricting portion) 43 c protrudes from the side of the release lever 43. The rotation restricting arm 43c protrudes in a direction substantially orthogonal to the up-down direction that is the moving direction of the release lever 43, and has a hook-like shape in which the vicinity of the tip is bent downward. Near the lower end of the up-absorbing lever 43, a spring hook 43d is provided.

  The release spring 44 is formed of a tension spring. One end of the release spring 44 is hooked on a spring hook portion 43 d formed on the release lever 43, and the other end portion is hooked on a spring hook portion 14 g formed on the side surface of the mirror box 14. Is biased to move downward. The movement of the release lever 43 in the urging direction by the release spring 44 is restricted by bringing the upper end portion (locking portion) of the guide hole 43b into contact with the guide pin 14e. The moving end of the release lever 43 in the urging direction (downward) of the release spring 44 is called a rotation restricting position. At the rotation restricting position of the release lever 43, the rotation restricting arm 43c advances on the rotation locus of the rotation restricting surface 41b around the shaft 41x of the down absorption lever 41, and the rotation restricting surface 43b is in contact with the rotation restricting surface 41b. Then, the rotation of the down absorption lever 41 in the urging direction of the down absorption spring 42 is restricted by bringing the side surface of the rotation restriction arm 43c into contact (FIGS. 10 to 12). More specifically, the rotation restricting surface 41b of the down absorption lever 41 and the side surface of the rotation restricting arm 43c of the release lever 43 can face each other and come into contact with each other because the release lever 43 is in the rotation restricting position and This is a state satisfying the relationship that the down-absorbing lever 41 is in the above-described over movement range. Thus, when the rotation of the release lever 43 is restricted by the contact of the rotation restricting surface 41b with the rotation restricting arm 43c, the down absorption lever 41 moves the buffer dowel 41a away from the buffer contact portion 16c of the mirror sheet 16. It is held in the over movement area. On the other hand, in a state where the end of the rotation restricting arm 43c deviates from the rotation locus of the rotation restricting surface 41b (FIG. 13), the holding in the over moving area with respect to the down absorbing lever 41 is released, and the down absorbing lever 41 is The down absorption spring 42 can be rotated in the urging direction (buffer standby position). In the state where the end of the rotation restricting arm 43c is in contact with the rotation permitting surface 41c (FIG. 14), the down absorbing lever 41 is brought into sliding contact with the rotation restricting arm 43c. Is allowed to rotate.

  The release lever 43 is formed with a support guide hole 43e which is a long hole oriented in the longitudinal direction substantially parallel to the moving direction of the release lever 43. An up absorption lever 45 is supported in the support guide hole 43e so as to be movable in the longitudinal direction. The up-absorption lever 45 has a buffer dowel 45a that protrudes inward of the mirror box 14. The mirror box 14 is formed with a through hole 14f (FIGS. 2, 3 and 9) which is a long hole in the vertical direction, and the release lever 43 is a long hole in the vertical direction at a position overlapping the through hole 14f. A certain through-hole 43f (FIGS. 9 to 15) is formed. The through-hole 43f communicates with the support guide hole 43e, and the buffer dowel 45a of the up-absorbing lever 45 supported by the support guide hole 43e is inserted into the through-hole 43f and the through-hole 14f so that the inside of the mirror box 14 (See FIGS. 2 and 3). The buffer dowel 45a is located on the movement locus of the buffer contact portion 16c of the mirror sheet 16 (on the rotation locus of the movable mirror 15 around the mirror sheet hinge 16x), and the upper surface of the buffer contact portion 16c. It can come into contact with the side. The up-absorbing lever 45 also has a lock pin (regulated portion) 45b that protrudes in the opposite direction to the buffer dowel 45a. The buffer dowel 45a and the lock pin 45b are positioned substantially on the same axis. In FIGS. 9 to 15, the buffer dowel 45a is positioned behind the lock pin 45b. The up-absorbing lever 45 further includes a buffer dowel 45a and a lock pin 45b below the support guide hole 43e of the release lever 43 in a direction substantially parallel to the support lever 43e (that is, a direction parallel to the movement direction of the release lever 43 and up-absorption lever 45). ), The guide hole 45c is formed. A guide pin 14e penetrating the guide hole 43b of the release lever 43 is inserted into the guide hole 45c, and when the up absorption lever 45 moves, the guide hole 45c and the guide pin 14e receive guidance.

  The up absorption spring 46 includes a coil portion 46a surrounding a spring support protrusion 14h (FIG. 9) provided on the side surface of the mirror box 14, a spring arm portion 46b that engages with a spring hook portion 14i formed on the side surface of the mirror box 14, The torsion spring has a spring arm portion 46c that engages with the base of the buffer dowel 45a of the up-absorbing lever 45, and urges the up-absorbing lever 45 to move downward in FIGS. The urging direction of the up-absorbing lever 45 by the up-absorbing spring 46 is a direction in which the buffer dowel 45a approaches (contacts) the buffer contact portion 16c of the mirror sheet 16, and is increased in the bias direction. The movement of the absorption lever 45 is restricted by contacting the lower end portion of the support guide hole 43e formed in the release lever 43. More specifically, when the release lever 43 is in the above-described rotation restricting position, it comes into contact with the lower end portion of the support guide hole 43e, thereby moving the up absorption lever 45 downward (in the biasing direction of the up absorption spring 46). Movement) is regulated. The downward movement end of the up absorption lever 45 is referred to as a buffer standby position.

  The lock lever 47 is supported on the side surface of the mirror box 14 so as to be rotatable about an axis 47x substantially parallel to the axis 41x of the down absorption lever 41. The lock lever 47 is provided with an interlocking arm (radial protrusion) 47a that protrudes in the outer radial direction centering on the shaft 47x, and the interlocking arm 47a is held by an arm holding portion 43g formed on the release lever 43. Is receiving. The arm holding portion 43g is composed of a pair of protrusions that are spaced apart in the advance / retreat direction of the release lever 43. The interlocking arm 47a is inserted between the pair of protrusions, and the lock lever 43 is moved according to the vertical movement of the release lever 43. 47 is rotated forward and backward. At the tip of the interlocking arm 47a, a holding recess 47b is formed along the outer surface shape of the lock pin 45b of the up-absorbing lever 45. When the release lever 43 is in the above-described rotation restricting position, the interlock arm 47 unlocks the interlock arm 47a (holding recess 47b) from the movement locus of the lock pin 45b (FIGS. 10 to 12, 15). ) And the release lever 43 is moved upward from the rotation restricting position so that the interlocking arm 47a (holding recess 47b) is positioned on the movement locus of the lock pin 45b (FIGS. 13 and 14). Is rotated. In order not to prevent smooth rotation of the lock lever 47, the distance between the pair of protrusions constituting the arm holding portion 43g is slightly larger than the width of the interlocking arm 47a.

  The operation of the mirror buffer mechanism 40 will be described with reference to FIG. FIG. 10 shows a state where the movable mirror 15 is in the down position. At this time, the mirror sheet boss 16 b is pressed downward by the mirror drive lever 34 constituting the mirror drive mechanism 30, and the movable mirror 15 is held in the down position by the stopper portion 16 a of the mirror sheet 16 contacting the down positioning dowel 20. Has been. The release lever 43 is held at the rotation restriction position by the urging force of the release spring 44, and the rotation restriction arm 43e is brought into contact with the rotation restriction surface 41b, whereby the urging direction (clockwise) of the down absorption spring 42 is achieved. The rotation of the down-absorbing lever 41 is restricted. The up absorption lever 45 is held at a buffer standby position in which the lower end surface thereof is brought into contact with the lower end of the support guide hole 43e by the urging force of the up absorption spring 46. Further, the lock lever 47 is held at the unlock position in which the holding recess 47b is retracted from the movement locus of the lock pin 45b.

  In the mirror down state of FIG. 10, the down absorption lever 41 is in an over movement region in which the buffer dowel 41 a is separated from the buffer contact portion 16 c of the mirror sheet 16, and the down absorption lever 41 is positioned in the mirror sheet 16. The positioning of the mirror sheet 16 by the down positioning dowel 20 is not hindered. More specifically, in FIG. 10 in which the mirror sheet 16 is viewed from the side, the stopper portion 16a provided on one side and the buffer contact portion 16c provided on the other side are shown as being in the same position. ing. The down absorption lever 41 whose rotation is restricted by the release lever 43 positions the buffering dowel 41a at a position advanced in the mirror down direction (counterclockwise direction in FIG. 10) from the down positioning dowel 20. Due to the relative positional relationship between the down positioning dowel 20 and the buffer dowel 41a, the down positioning dowel 20 is in contact with the stopper portion 16a, and the buffer dowel 41a is not in contact with the buffer contact portion 16c (over movement range). It is done.

  When the movable mirror 15 is rotated from the down position to the up position by the mirror drive lever 34 of the mirror drive mechanism 30, the upper surface of the buffer contact portion 16c of the mirror sheet 16 is eventually raised as shown in FIG. It contacts the buffer dowel 45a of the absorption lever 45. When the movable mirror 15 is rotated in the up position direction from this state, the buffer contact portion 16c of the mirror sheet 16 pushes up the buffer dowel 45a and cushions the up absorption lever 45 against the urging force of the up absorption spring 46. Press and move upward from the standby position. In the initial stage of the upward movement of the up absorption lever 45, the up absorption lever 45 slides in the support guide hole 43e, and the release lever 43 is not moved. That is, the up absorption lever 45 moves alone, and the release lever 43 remains in the rotation restricting position that restricts the rotation of the down absorption lever 41. Subsequently, when the upper end surface of the up-absorption lever 45 comes into contact with the upper end of the support guide hole 43e, the pressing movement force by the movable mirror 15 also acts on the release lever 43. The up absorption lever 45 is moved upward integrally. At this stage, in addition to the urging force of the up absorbing spring 46, the urging force of the release spring 44 also acts on the movable mirror 15, and the movable mirror 15 is moved to the up position while receiving the load by the two springs 44, 46. Rotate towards When the release lever 43 moves upward from the rotation restriction position, the rotation restriction arm 43c of the release lever 43 retracts upward from the rotation locus of the rotation restriction surface 41b of the down absorption lever 41. As a result, the rotation restriction on the down absorption lever 41 is released, and as shown in FIG. 13, the down absorption lever 41 is rotated to the buffer standby position in contact with the rotation restriction protrusion 14c by the urging force of the down absorption spring 42. Is done. When the down absorption lever 41 is in the buffer standby position, the buffer dowel 41a is located above the down positioning dowel 20, that is, a position (the movable mirror 15 is moved in the clockwise direction in FIG. 13) of the movable mirror 15. When rotating to the down position, a position where the contact between the buffer contact portion 16c of the mirror sheet 16 and the buffer dowel 41a occurs before the contact between the stopper portion 16a of the mirror sheet 16 and the down positioning dowel 20 )It is in.

  FIG. 13 shows a state where the release lever 43 and the up absorption lever 45 are pushed upward by the movable mirror 15 rotated to the up position. As described above, when the movable mirror 15 is rotated to the up position, the up absorption lever 45 is moved from the support guide hole 43e from the state of FIG. 11 in which the buffer contact portion 16c starts to contact the buffer dowel 45a. The movable mirror 15 presses and moves the up absorption lever 45 against the urging force of the up absorption spring 46 until the state shown in FIG. From the state shown in FIG. 12 to the mirror-up completed state shown in FIG. 13, the movable mirror 15 integrally presses and moves the release lever 43 and the up absorption lever 45 against the urging force of the release spring 44 and the up absorption spring 46. . That is, when the movable mirror 15 approaches the up position, loads of the up absorption spring 46 and the release spring 44 act, and the movable mirror 15 is buffered by the up absorption lever 45 and the up absorption spring 46, the release lever 43 and the release spring 44. While reaching the up position. Thereby, the occurrence of bounce (vibration) of the movable mirror 15 when rotating from the down position to the up position is reduced. Specifically, the occurrence time of bounce is shortened and the number of times of bounce is reduced. At the up position of the movable mirror 15, the upper surface of the mirror sheet 16 comes into contact with the upper stopper 21, and further upward rotation is restricted (FIG. 1). In the state of FIG. 13, the up-absorbing lever 45 is restricted from moving further upward by the lower end portion of the guide hole 45c contacting the guide pin 14e. The movable mirror 15 comes into contact with the upper stopper 21 before the up absorption lever 45 reaches the upper moving end. That is, like the down absorption lever 41, the up absorption lever 45 is also raised by the upper stopper 21 at the tip of the buffer movement area where the buffer dowel 45a is pressed by the buffer contact portion 16c of the movable mirror 15 (mirror sheet 16). There is an over-moving range in which the buffer dowel 45a can be separated from the buffer contact portion 16c of the movable mirror 15 in the stopped state. However, compared to the down absorption lever 41, the over movement range of the up absorption lever 45 is set narrower.

  As shown in FIG. 13, when the release lever 43 is moved upward from the rotation restricting position according to the mirror up rotation of the movable mirror 15, the interlock arm 47a is pushed up by the arm holding portion 43g of the release lever 43. The lock lever 47 is rotated from the unlock position to the lock position. Then, the interlock arm 47a of the lock lever 47 advances below the lock pin 45b of the up absorption lever 45 moved upward together with the release lever 43, and the lock pin 45b is fitted and supported by the holding recess 47b. At this time, the rotation allowing surface 41c of the down absorption lever 41 rotated to the buffer standby position is located below the rotation restricting arm 43c of the release lever 43, and as shown in FIG. When the arm 43c contacts the rotation allowing surface 41c, further downward movement of the release lever 43 is restricted. In other words, the vertical movement of the release lever 43 is limited to the clearance until the rotation restricting arm 43c comes into contact with the rotation allowable surface 41c. In the limited movable range of the release lever 43, the interlock arm 47a (holding recess 47b) of the lock lever 47 does not leave the movement locus of the lock pin 45b, and the lock lever 47 continues to be held at the lock position. Therefore, even if the up absorption lever 45 tries to move downward in the urging direction of the up absorption spring 46, the up absorption lever 45 is restricted by the contact between the lock pin 45b and the holding recess 47b. That is, when the movable mirror 15 approaches the up position, the respective movable ranges of the release lever 43 and the up absorption lever 45 are limited by the down absorption lever 41 and the lock lever 47, and the buffer dowel 45a rebounds when absorbing the mirror bound. Can be kept small. As a result, the bounce of the movable mirror 15 given through the buffer dowel 45a is suppressed to a range indicated by a solid line and a two-dot chain line in FIG.

  When the movable mirror 15 is rotated from the up position to the down position by the mirror drive lever 34 of the mirror drive mechanism 30, the push-up state by the buffer contact portion 16c of the mirror sheet 16 is released, so that the release lever 43 and The up absorption lever 45 tends to move downward by the biasing force of the release spring 44 and the up absorption spring 46, respectively. As for the release lever 43, as shown in FIG. 14, the lowering of the rotation restricting arm 43 c is brought into contact with the rotation permission surface 41 c of the down absorption lever 41, so that the downward movement is restricted on the way. As described above, at the corresponding position of the release lever 43, the lock lever 47 is held in the unlocked position, so that the downward movement of the up-absorbing lever 45 is also limited by the fitting of the holding recess 47b and the lock pin 45b. Subsequently, when the movable mirror 15 approaches the down position, the buffer contact portion 16c of the mirror sheet 16 is used for buffering the down absorption lever 41 before the stopper portion 16a of the mirror sheet 16 contacts the down positioning dowel 20. It contacts the dowel 41a. At this time, the down absorption lever 41 is held at the buffer standby position by the urging force of the down absorption spring 42, and the buffer sheet abuts against the mirror sheet 16 while the movable mirror 15 rotates to the down position shown in FIG. The portion 16c pushes down the buffer dowel 41a, and rotates the down absorption lever 41 counterclockwise from the buffer standby position shown in FIGS. 13 and 14 against the urging force of the down absorption spring 42. At this time, the down-absorbing lever 41 can be rotated without being restricted by the release lever 43 by bringing the rotation allowing surface 41 c into sliding contact with the end of the rotation restricting arm 43 c. As a result, while the down absorption lever 41 is rotating in the buffer movement range starting from the buffer standby position, the load of the down absorption spring 42 acts on the rotation of the movable mirror 15, and the movable mirror 15 absorbs the down absorption. It reaches the down position while being buffered by the lever 41 and the down absorption spring 42. As a result, the occurrence of bounce (vibration) of the movable mirror 15 when rotating from the up position to the down position is reduced (the occurrence time of bounce is shortened and the number of bounces is reduced).

  FIG. 15 shows a state immediately after the movable mirror 15 is rotated to the down position. Similarly to FIG. 10, the stopper portion 16 a of the mirror sheet 16 abuts on the down positioning dowel 20 and the movable mirror 15 is moved. Rotation in the mirror down direction (counterclockwise in FIG. 15) is restricted. As a result of the down absorption lever 41 being pressed and rotated from the buffer standby position, the movement restriction due to the contact relationship between the rotation allowing surface 41 c and the rotation restriction arm 43 c is released, and the release lever 43 is moved by the urging force of the release spring 44. It has been moved downward to the rotation restricting position. Thereby, the rotation restricting arm 43c advances on the rotation locus of the rotation restricting surface 41b, and the rotation of the down absorption lever 41 to the buffer standby position (clockwise in FIG. 15) is restricted. Specifically, when the movable mirror 15 rotates to the down position, as shown in FIG. 15, the down absorption lever 41 moves beyond the buffer movement range from the rotation restricting arm 43 c of the release lever 43 to the rotation restricting surface. It is rotated by inertia up to the position where 41b is separated, that is, the over movement range. Subsequently, the down absorption lever 41 returns to the position of FIG. 10 in which the rotation restricting surface 41 b is brought into contact with the rotation restricting arm 43 c of the release lever 43 by the urging force of the down absorbing spring 42. As described above, not only FIG. 15 but also the position of the down-absorbing lever 41 in FIG. 10 is an over-moving region in which the buffer dowel 41 a is separated from the buffer contact portion 16 c of the mirror sheet 16. The position is determined by down positioning dowels 20. That is, when the movable mirror 15 rotates toward the down position, the down absorption lever 41 functions as a buffer member in a buffer movement area in which the buffer dowel 41a contacts the buffer contact portion 16c. In the state where the down position has been reached, the release lever 43 is held at the non-contact position (over movement range) with respect to the mirror sheet 16 and does not hinder the positioning of the movable mirror 15 by the down positioning dowel 20.

  Further, when the release lever 43 moves to the rotation restricting position, the arm holding portion 43g pushes down the interlocking arm 47a, and the lock lever 47 is rotated from the lock position to the unlock position. As a result, the interlocking arm 47a is retracted from the movement locus of the lock pin 45b, the fitting of the holding recess 47b and the lock pin 45b is released, and the up absorption lever 45 can move downward in the rotation restricting arm 43e. Therefore, as shown in FIG. 15, the up absorption lever 45 is moved to the buffer standby position which is the downward movement end by the urging force of the up absorption spring 46.

  As described above, in the camera 10 of the present embodiment, when the movable mirror 15 rotates between the down position and the up position, the buffer dowel 41a of the down absorption lever 41 constituting the mirror buffer mechanism 40 and the up absorption. The buffer dowel 45a of the lever 45 is brought into contact with the mirror sheet 16 to suppress the bounce of the movable mirror 15. Accordingly, it is possible to prevent the occurrence of image shake when observing the subject through the finder optical system 22 and the delay of the arithmetic processing using the photometry unit 23 and the distance measurement unit 24, and the finder observation in the camera 10 can be prevented. Performance and continuous shooting performance can be improved.

  When the mirror buffer mechanism 40 absorbs the impact of the movable mirror 15 that rotates from the down position to the up position, the up absorption lever 45 is first pressed and moved, and then the release lever 43 is pressed together with the up absorption lever 45. It has a moving structure. The load on the movable mirror 15 acts from the time (FIG. 11) when the buffer contact portion 16 c of the mirror sheet 16 starts pressing the buffer absorbing dowel 45 a of the up absorbing lever 45, but the up absorbing lever 45 is connected to the release lever 43. Until the integrated movement is started (FIG. 12), the release lever 43 is held at a fixed position. That is, the movement space of the release lever 43 that supports the up absorption lever 45 is kept small while ensuring a large movement stroke of the up absorption lever 45 that directly contacts the buffer contact portion 16c of the mirror sheet 16. Therefore, it is possible to obtain an excellent shock absorbing performance for the movable mirror 15 while having a compact structure.

  In the mirror buffer mechanism 40, the up absorption lever 45 and the release lever 43 are individually urged by the up absorption spring 46 and the release spring 44. When the movable mirror 15 rotates to the up position, the up is first increased. The load of the absorption spring 46 acts, and then the load of the release spring 44 acts in addition to the up absorption spring 46. Therefore, at the initial stage of shock absorption, the load is small and the rotational speed of the movable mirror 15 is not reduced, and when the movable mirror 15 approaches the up position, the load can be increased and the mirror bounce can be reliably suppressed. Furthermore, by adjusting the urging force of the up absorption spring 46 and the release spring 44, it is easy to easily set the shock absorption.

  When the movable mirror 15 is rotated to the up position, the lock lever 47 restricts the downward movement of the up absorption lever 45 and the down absorption lever 41 restricts the downward movement of the release lever 43. As a result, the movable range of the buffer dowel 45a contacting the buffer contact portion 16c of the mirror sheet 16 is limited, and the bounce of the movable mirror 15 can be suppressed small. Further, the down absorption lever 41 that restricts the downward movement of the release lever 43 is a member that performs shock absorption when the movable mirror 15 rotates from the up position to the down position. The number of parts is smaller than that provided separately, and the configuration is simple. Further, the lock lever 47 that restricts the downward movement of the up-absorbing lever 45 is a rotating member that is rotated to the locked position and the unlocked position in accordance with the movement of the release lever 43 that supports the up-absorbing lever 45. It can be operated with a simple mechanism.

  In addition, contrary to when the movable mirror 15 is rotated from the down position to the up position, when the movable mirror 15 is rotated from the up position to the down position, the rotation restriction arm 43c of the release lever 43 is controlled. When the rotation restricting surface 41b of the down absorption lever 41 comes into contact, the rotation of the down absorption lever 41 in the urging direction of the down absorption spring 42 is restricted, and the positioning of the movable mirror 15 by the down positioning dowel 20 is affected. It does not reach. That is, the down-absorption lever 41 and the release lever 43 are in a relationship of mutually restricting the position when the mirror is down and when the mirror is up, and the structure is simplified.

  Further, the urging force of the down absorption spring 42, the release spring 44, and the up absorption spring 46 is not only a buffer for the movable mirror 15, but also the movement limitation on the up absorption lever 45 and the release lever 43 in the mirror up state, and the mirror down state. This is also used for holding the down-absorbing lever 41 in this case, which also contributes to the simplification of the structure.

  In the above embodiment, when the movable mirror 15 rotates from the down position (finder observation position) to the up position (retracted position), the shock absorption is performed by the up absorption lever 45 and the release lever 43 which are two-stage buffer members. The bounce suppression in the up-absorbing lever 45 and the release lever 43 is performed, and the down-absorbing lever 41 that is an impact-absorbing means when the movable mirror 15 rotates from the up position (retracted position) to the down position (finder observation position) In this configuration, the lock lever 47 is used. On the other hand, by reversing “up position” and “down position” in the related explanation part of the mirror buffer mechanism 40 of the above embodiment, the present invention allows the movable mirror 15 to move from the up position (retracted position) to the down position. The present invention can also be applied to a configuration that obtains the same effect when rotating to the (finder observation position).

  As mentioned above, although demonstrated based on illustration embodiment, this invention is not limited to this. For example, in the mirror buffer mechanism 40 of the illustrated embodiment, the release lever 43 and the up absorption lever 45 that constitute first and second mirror retracting buffer members (first buffer member and second buffer member) that function when the mirror is raised are provided. The down-absorbing lever 41, which is a linearly moving member and functions as a mirror advancement buffer member (third buffer member) that functions when the mirror is down, is a rotary member with the shaft 41x as the center of rotation. The movement modes (movement directions) of the respective buffer members that sometimes act may be a different combination.

  In the illustrated embodiment, the biasing means for biasing the release lever 43 is a release spring 44 made of a tension spring, and the biasing means for biasing the down absorption lever 41 and the up absorption lever 45 is a down absorption made of a torsion spring. Although it is the spring 42 and the up absorption spring 46, the aspect of the urging means for urging each of the buffer members is not limited to this. For example, the release lever 43 can be urged by a torsion spring such as the up absorption spring 46, or the up absorption lever 45 can be urged by a tension spring such as the release spring 44. Furthermore, an urging member other than a torsion spring or a tension spring can be used.

DESCRIPTION OF SYMBOLS 10 Single-lens reflex camera 11 Camera body 12 Lens barrel 13 Lens mount 14 Mirror box 14a Through-hole 14b Spring hook part 14c Rotation restricting protrusion 14d Guide pin 14e Guide pin (fixing member)
14f Through hole 14g Spring hook 14h Spring support protrusion 14i Spring hook 15 Movable mirror (quick return mirror)
15a Main mirror 16 Mirror sheet 16a Stopper part 16b Mirror sheet boss 16c Buffer contact part 16x Mirror sheet hinge (rotating shaft of movable mirror)
17 Sub-mirror 18 Focal plane shutter 19 Image sensor (light-receiving medium for imaging)
20 Down positioning dowel 21 Upper stopper 22 Viewfinder optical system 22a Viewfinder window 23 Metering unit 24 Distance measuring unit 25 LCD monitor 30 Mirror drive mechanism 31 Motor 32 Reduction gear train 33 Cam gear 34 Mirror drive lever 34x Mirror drive lever shaft 35 Shutter charge lever 40 Mirror buffer mechanism (movable mirror shock absorption mechanism)
41 Down absorption lever (holding means, mirror advance buffer member, third buffer member)
41a Buffer dowel 41b Rotation restricting surface 41c Rotation permitting surface 41d Spring hook 41x Down absorption lever shaft 42 Down absorption spring (rotation urging member)
42a Coil portion 42b 42c Spring arm portion 43 Release lever (second mirror retracting buffer member, second buffer member)
43a guide hole 43b guide hole (locking part)
43c Rotation restriction arm (rotation restriction part)
43d Spring hook portion 43e Support guide hole 43f Through hole 43g Arm holding portion 44 Release spring (biasing means, second spring)
45 Up absorption lever (first mirror retracting buffer member, first buffer member)
45a Buffer dowel 45b Lock pin (restricted part)
45c guide hole 46 up absorption spring (biasing means, first spring)
46a Coil part 46b 46c Spring arm part 47 Lock lever (holding means, interlocking lock member)
47a Interlocking arm (radial protrusion)
47b Holding recess 47x Lock lever shaft 48 Holding plate

Claims (9)

A finder light position for reflecting subject light to the observation optical system located photographing optical path, retreats from the photographing optical path pivotable between a retracted position for passing the object light to an imaging photodetecting medium side Movable mirror supported by
The first mirror retraction buffer member the movable mirror is pressed and moved in contact with the movable mirror when rotated to the retreat position from the finder light position;
The first mirror retraction cushioning member relatively movably supported, when the movable mirror is rotated to the retreat position from the finder light position, the first to the first mirror retraction cushioning member by the movable mirror in the pressing direction to move alone, followed by a second mirror retraction cushioning member moved to the pressing pressure direction together with the first mirror retraction cushioning member;
Each said first mirror retraction cushioning member and the second mirror retraction cushioning member, the biasing means moves urging the pressing direction of movement in the opposite direction by the movable mirror; and
When the first mirror retraction cushioning member and the second mirror retraction cushioning member was pressed and moved in the direction opposite to the biasing direction of the biasing means by the movable mirror which rotates to the retracted position, the biasing holding means for limiting movement of the first mirror retraction cushioning member and the second mirror retraction buffer member in the direction;
A movable mirror shock absorbing mechanism of a camera characterized by comprising: The movable mirror shock absorbing mechanism for a camera according to claim 1, wherein the holding means is
When the movable mirror is in the retracted position, held by the movement limiting position for limiting the movement of the second mirror retraction cushioning member in the urging direction of said urging means, the said movable mirror from said retracted position when rotating the finder light position, mirror in contact with the movable mirror being pressed and moved from the movement limiting position, to release the movement restriction with respect to the second mirror retraction cushioning member performs shock absorption for the movable mirror An advancing buffer member; and a lock position that regulates relative movement of the first mirror retracting buffer member relative to the second mirror retracting buffer member in conjunction with the movement of the second mirror retracting buffer member; and the relative movement Interlocking locking member that is moved to an unlocking position that allows
The provided, when said second mirror retraction cushioning member is in position to receive the movement restriction by the mirror advancement buffer member the interlocking lock member is held at the lock position, the movement restriction by the mirror advancement cushioning member is released said by the second mirror retraction cushioning member moves to the urging direction of said urging means, said interlocking lock member is movable mirror shock absorbing mechanism of the camera to be moved to the unlock position. In the movable mirror shock absorbing mechanism according to claim 2, wherein the camera, each of the first mirror retraction cushioning member and the second mirror retraction cushioning member is substantially along a plane substantially perpendicular to the pivot axis of the movable mirror It can move straight in parallel,
The interlock lock member is rotatable about a rotation axis substantially parallel to the rotation axis of the movable mirror, and has a radial protrusion that protrudes in an outer radial direction centering on the rotation axis. ,
When the interlocking locking member is in the locking position, the radial projections are located on the moving locus of the restricting portion provided on the first mirror retraction cushioning member above, the radial projection and the controlled portion contact by restricting the movement of the first mirror retraction cushioning member in the urging direction of said urging means, when said interlocking lock member is in the unlocked position, the radial projecting portion is above the regulation and retracted from the movement path of the parts, the movable mirror shock absorbing mechanism of the camera to allow movement of the first mirror retraction cushioning member in the urging direction of said urging means. In the movable mirror shock absorbing mechanism according to claim 2 or 3, wherein the camera, the first mirror retraction cushioning member and the second mirror retraction cushioning member is supported on the side of the mirror box supporting the movable mirror inside are, the biasing means, a second that engages the first spring and said mirror box and the second mirror retraction cushioning member which engages with the mirror box and the first mirror retraction cushioning member The movable mirror shock absorbing mechanism of the camera consisting of a spring. 5. The movable mirror shock absorbing mechanism for a camera according to claim 2, wherein the mirror advancing buffer member is rotatable about a rotation axis substantially parallel to a rotation axis of the movable mirror. , the mirror advancement cushioning member includes a rotation urging member for urging rotation to said movement restriction position, when the movable mirror is rotated to the finder light position, the biasing force of the rotation urging member movable mirror shock absorbing mechanism of the camera to press the mirror advancement cushioning member while resisting. 6. The movable mirror shock absorbing mechanism for a camera according to claim 5, wherein the second mirror retracting buffer member is
Engaging portion abuts against the fixing member determines the moving end of said second mirrors retraction cushioning member in the urging direction by the biasing means; and
When the second mirror retraction cushioning member is in a position to abut on the fixing member to the engaging portion, the mirror expansion buffer to said movement restriction position advanced to the rotation path of the mirror advancement cushioning member and restricting the rotation of the member, by the second mirror retraction cushioning member is pressed and moved in the opposite direction biasing direction of the biasing means together with the first mirror retraction cushioning member by said movable mirror, the A rotation restricting portion that retracts from the rotation locus of the mirror advancing buffer member and allows its rotation;
The movable mirror shock absorbing mechanism of the camera equipped with. The movable mirror shock absorbing mechanism of the camera according to claim 6, wherein the mirror advancing buffer member is
The contact with the rotation restricting portion of the second mirror retraction cushioning member rotation restricting surface subjected to rotation restriction to the movement restriction position; located on the outer diameter side than and the rotation restricting surface, the mirror advancement cushioning member in contact with said second mirror retraction cushioning member when in the movement restriction position to restrict the movement of the second mirror retraction cushioning member in the urging direction of said urging means, and rotation permitting surface to allow rotation of the mirror advancement cushioning member;
A movable mirror shock absorbing mechanism of a camera having A finder light position for reflecting subject light to the observation optical system located photographing optical path, retreats from the photographing optical path pivotable between a retracted position for passing the object light to an imaging photodetecting medium side Movable mirror supported by
When the movable mirror is rotated in one direction between the finder light position and the retracted position, the first buffer member is pressed and moved in contact with the movable mirror;
The first cushioning member and relatively movable supported, when the movable mirror is rotated in the one direction, the first the first cushioning member is moved solely in the pressing direction by the movable mirror, followed by the A second buffer member moved in the pressing direction together with the first buffer member;
Each said first cushioning member and the second cushioning member, the biasing means moves urged in a direction opposite to the pressing direction of movement by the movable mirror; the first cushioning member and the second cushioning member and by the movable mirror when is pressed and moved in the direction opposite to the biasing direction of the biasing means, the holding means for limiting movement of the first cushioning member and the second cushioning member in the biasing direction;
A movable mirror shock absorbing mechanism of a camera characterized by comprising: The movable mirror shock absorbing mechanism for a camera according to claim 8, wherein the holding means is
When the movable mirror is rotated in the direction of the one is pressed and moved to the first buffer member and the second cushioning member, restrict the movement of the second cushioning member in the urging direction of said urging means is held by a movable limit position where, when the movable mirror which rotates to said one direction and opposite direction, in contact with the movable mirror being pressed and moved from the movement restriction position, performs shock absorption for the movable mirror A third buffer member that releases a restriction on movement relative to the second buffer member; and a lock position that regulates relative movement of the first buffer member relative to the second buffer member in conjunction with movement of the second buffer member; An interlocking lock member that is moved to an unlock position that allows the relative movement;
The provided, when said second buffer member is in a position to receive the movement restriction by the third cushioning member is the interlocking lock member is held in the locking position, the third movement restriction by the cushioning member is released the said second by buffering member moves urging direction of said urging means, a camera movable mirror shock absorbing mechanism of the interlocking lock member is moved to the unlock position.

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