JP2018173598A - Optical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical apparatus equipped with a movement mechanism with which it is possible to accurately guide along the direction of movement by a space-saving configuration.SOLUTION: In order to solve the problem, this optical apparatus is characterized by comprising: an optical system; a base member having a first contact surface and a first support surface; a movement member for holding the optical system and having a second contact surface and a second support surface facing each of the first contact surface and the first support surface, as well as being capable of moving relatively to the base member; a rolling member arranged in a space enclosed by the first and second contact surfaces and the first and second support surfaces and extending in the direction of the relative movement, and coming in contact with the first and second contact surfaces; and two or more spacer members arranged in the space and coming in contact with the first and second support surfaces.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an optical apparatus having a moving unit. For example, a focus moving unit that moves the focus group, a zoom moving unit that moves the zoom group, and an optical device (binoculars, interchangeable lens device) that includes an anti-vibration optical system (anti-vibration lens) and an anti-vibration mechanism that moves an image sensor , Imaging devices, etc.).

  In recent years, optical devices such as binoculars, for example, often have a moving device that moves an optical system. In the invention of the observation device of Patent Document 1, the base member that supports the moving unit is provided with a total of four groove portions, two in length and width. A total of eight balls are engaged with each of the groove portions, two on the upper and lower sides of the base member. A mechanism for guiding the movement of the optical system in the optical axis direction by the guide portion having the groove and the ball is disclosed.

JP 2010-54573 A

  The prior art disclosed in Patent Document 1 includes a biasing member that biases one of the base member and the moving member toward the other in order to guide accurately along the moving direction. For this reason, the subject which is bulky in the surface orthogonal to a moving direction occurred.

  Accordingly, an object of the present invention is to provide an optical apparatus including a moving mechanism that can accurately guide the moving direction in a space-saving configuration.

  In order to achieve the above object, an optical apparatus according to the present invention includes an optical system, a base member having a first contact surface and a first support surface, the optical system, and the first contact surface. And a second contact surface and a second support surface facing each of the first support surfaces, and a movable member capable of relative movement with respect to the base member, and the first and second contacts A rolling member that is surrounded by a surface and the first and second support surfaces, is disposed in a space extending in the direction of the relative movement, and is in contact with the first and second contact surfaces, and is disposed in the space, And two or more spacer members in contact with the first and second support surfaces.

  ADVANTAGE OF THE INVENTION According to this invention, an optical apparatus provided with the moving mechanism which can be accurately guided along a moving direction with a space-saving structure can be provided.

External view of the binoculars (optical apparatus) of Example 1 Sectional view of the binoculars cut along the plane including both the optical axes OL and EL Sectional view in which binoculars are cut along a plane perpendicular to the optical axis OL The exploded view which looked at some guide mechanisms of Example 1 from the top The exploded view which looked at a part of guide mechanism of Example 1 from the bottom Sectional drawing which looked at the guide mechanism of Example 1 from the objective side Sectional drawing which looked at the guide mechanism of Example 1 from the eyepiece side Sectional drawing which cut | disconnected the guide mechanism of Example 1 in the position of a ball | bowl Perspective view of another shaped bearing unit Block diagram of an imaging apparatus equipped with an interchangeable lens, which is an example of an optical apparatus according to Embodiment 2 The exploded view which looked at the guide mechanism of Example 2 from back. The exploded view which looked at the guide mechanism of Example 2 from the back different angle The exploded view which looked at the guide mechanism of Example 2 from the front The exploded view which looked at the guide mechanism of Example 2 from the front different angle The figure which looked at the guide mechanism of Example 2 from the front. Sectional drawing which cut | disconnected the guide mechanism of Example 2 by the AA fracture | rupture line of FIG. Sectional drawing which cut | disconnected the guide mechanism of Example 2 by the BB broken line of FIG. Sectional drawing which cut | disconnected the guide mechanism of Example 2 by the CC broken line of FIG. Sectional drawing which cut | disconnected the guide mechanism of Example 2 by the DD broken line of FIG. Sectional drawing which cut | disconnected the guide mechanism of Example 2 by the EE fracture | rupture line of FIG. Sectional drawing which cut | disconnected the guide mechanism of Example 2 by the FF fracture | rupture line of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is an external perspective view of the binoculars (optical apparatus) of the present embodiment. The binoculars have a pair of left and right objective optical systems (focus group and zoom group), a pair of left and right erecting optical systems, and a pair of left and right eyepiece optical systems. The left and right sides correspond to the left and right sides of the observer's eyes. In FIG. 1, the optical axis OL of the left objective optical system and the optical axis OR of the right objective optical system are parallel, and the distance between the optical axis OL and the optical axis OR is the optical axis EL of the left eyepiece optical system and the right axis. This represents a state in which the interval between the optical axes ER of the eyepiece optical system is the same.

  The front cover 24 holds the left and right protective glasses L1L and L1R at its tip. The protective rubber 26 covers the outer sides of the left and right protective glasses L1L and L1R, thereby mitigating the impact on the inside due to dropping or the like. The eyepiece fixing member 10 and the front cover 24 are integrated by a fixing screw (not shown), and accommodate and protect the left and right optical systems and mechanical structures.

  FIG. 2 is a cross-sectional view of the binoculars in the state of FIG. 1 cut along a plane including both optical axes OL and EL, and shows the left optical system. The objective optical system includes a protective glass L1L and an objective lens group L2L. The erecting optical system includes a Polo II type prism L3L. The eyepiece optical system includes an eyepiece lens group L4L. The optical axis of the eyepiece lens group L4L coincides with the optical axis EL of the eyepiece optical system.

  The front lens barrel 1L holds the objective lens L2L and is suspended from the fixed barrel 2L by an eccentric roller (not shown). The fixed cylinder 2L is screwed to the left end portion of the objective table 3 with screws 4. The front lens barrel 1L is adjusted in parallel eccentricity and tilting with an eccentric roller, and the position of the front lens barrel 1L in the direction orthogonal to the optical axis is determined so that the optical axis of the front lens barrel 1L coincides with the optical axis EL of the eyepiece optical system. .

  The eyepiece tube 5L holds the eyepiece lens group L4L. The prism holder 6L holds the Polo II type prism L3L. The eyepiece holder 7L holds the eyepiece tube 5L. The prism holder 6L and the eyepiece holder 7L are integrated with screws or the like so that the Polo II prism L3L and the eyepiece lens L4L have a predetermined positional relationship. The eyepiece rubber 8L is placed on the left eyepiece tube 5L, and the shape of the eyepiece side can be folded back to change the eyepiece position.

  In order to couple the eyepiece tube 5L and the eyepiece holder 7L, a male helicoid screw is formed on the outer peripheral wall of the eyepiece tube 5L, and a female helicoid screw is formed on the inner peripheral wall of the eyepiece holder 7L. By rotating either the eyepiece tube 5L or the right eyepiece tube (not shown) and moving it back and forth along the optical axis, the left and right diopter can be adjusted. With the above configuration, the left eyepiece unit 9L is configured. The right eyepiece unit 9R is configured with the same configuration.

  The eyepiece fixing member 10 supports the left and right eyepiece units 9L and 9R so as to be rotatable around the optical axes OL and OR of the left and right objective optical systems, and advances and retracts the left and right objective optical systems along the optical axis to observe the distance. It is the support part of the structure which performs the focusing (focusing) according to this. Since the eyepiece fixing member 10 requires high rigidity and accuracy, it is made of metal. The eyepiece fixing member 10 is provided with an opening 10L coaxial with the optical axis OL of the objective optical system. A cylindrical portion 6La provided in the prism holder 6L is rotatably fitted in the opening 10L.

  In the present embodiment, the left optical system has been described, but the right optical system has the same configuration.

  3 is a cross-sectional view of the binoculars in the state of FIG. 2 cut along the broken line of FIG. The left and right interlocking plates 11L and 11R interlock the rotational movements of the cylindrical portions 6La and 6Ra of the prism holders 6L and 6R, respectively. Each of the interlocking plates 11L and 11R includes gear portions 11La and 11Ra and a plurality of arm portions 11Lb and 11Rb that generate a biasing force along the optical axis by being incorporated at predetermined positions.

  The interlocking plates 11L and 11R are fastened to the prism holders 6L and 6R with screws so that the arms 11Lb and 11Rb are urged with the eyepiece fixing member 10 interposed therebetween. By meshing the gear portions 11La and 11Ra, the rotational movements of the left and right eyepiece units 9L and 9R can be linked.

  Since the optical axes EL and ER are decentered by a predetermined amount with respect to the optical axes OL and OR by the left and right Polo II prisms, the width of the optical axes EL and ER can be increased by rotating the eyepiece units 9L and 9R. Change. This makes it possible to perform eye width adjustment that matches the distance between the left and right pupils of the observer who uses binoculars and the distance between the optical axes EL and ER.

  FIG. 4 is an exploded perspective view of a part of the guide mechanism of the focus mechanism as viewed from the objective side and from above. FIG. 5 is an exploded perspective view of the objective side as viewed from below.

  The base member 12 is fixed to the eyepiece fixing member 10 shown in FIG. In order to perform focusing according to the observation distance, the base member 12 supports the focus table 14 (moving member) 14 via the bearing unit 19 so as to be relatively movable in the optical axis direction (x-axis direction). . That is, the base member 12 guides the relative movement in the optical axis direction (x direction) of the focus table 14 (moving member) holding the objective optical system via the bearing unit 19. On the focus base 14 (moving member), the objective base 3 (FIG. 2) to which the left and right objective optical systems are fixed is fixed by screws (not shown). The moving member may be configured to hold the optical system in a movable manner.

  The focus operation dial 16 is coupled with screws (not shown) so as to sandwich the feed screw 15 and the eyepiece fixing member 10 (FIG. 2). Therefore, the movement of the focus operation dial 16 in the optical axis direction (x-axis direction) is restricted. At the same time, it can rotate in place with the feed screw 15.

  The moving nut 17 is fixed to the focus base 14 (moving member) with a screw 18 and meshes with the threaded portion of the feed screw 15. Accordingly, by rotating the focus operation dial 16, the moving nut 17 drives the left and right objective optical systems to advance and retract along the optical axis. As a result, focusing according to the observation distance is performed.

  In the present embodiment, the focusing guide mechanism includes a base member 12, a focus base 14 (moving member), a bearing unit 19, and a spacer member 22. The base member 12 is formed with a V-shaped groove 12a and a V-shaped groove 12b that are opposed to each other in the left-right direction (y-axis direction) and extend along the optical axis. Further, on the outer periphery of the focus table 14 (moving member), a V-shaped groove 14a that faces each V-shaped groove formed in the base member 12 and extends along the relative movement direction (x-axis direction, optical axis direction). A V-shaped groove 14b is formed.

  This embodiment is characterized in that a space extending along the relative movement direction (x-axis direction) of the focus table 14 (moving member) is provided by the configuration in which these V-shaped grooves face each other. In this embodiment, two spaces are provided in the left-right direction (y-axis direction). Specifically, there are two places: a space surrounded by the V-shaped grooves 12a and 14a and a space surrounded by the V-shaped grooves 12b and 14b.

  First, the configuration of this space will be described with reference to FIGS. FIG. 6 is an enlarged cross-sectional view of the guide mechanism as viewed from the objective side (relative movement direction, x-axis direction, optical axis direction). FIG. 7 is an enlarged cross-sectional view seen from the eyepiece side (relative movement direction, x-axis direction, optical axis direction). FIG. 8 is an enlarged cross-sectional view at the position of the ball viewed from the objective side (relative movement direction, x-axis direction, optical axis direction) of the guide mechanism.

  The V-shaped groove 12a of the base member 12 constituting the first space includes a first contact surface 12a1 and a first support surface 12a2. Further, the V-shaped groove 14a of the focus table 14 (moving member) includes a second contact surface 14a1 and a second support surface 14a2. In the present embodiment, the first and second contact surfaces are configured to face each other. Similarly, the first and second support surfaces are also configured to face each other.

  With this configuration, when viewed from the relative movement direction (x-axis direction, optical axis direction), a rectangular shape surrounded by the opposing first and second contact surfaces and the opposing first and second support surfaces (A space surrounded by 12a1, 12a2, 14a1, and 14a2).

  In addition, the V-shaped groove 12b of the base member 12 constituting the second space also includes a first contact surface 12b1 and a first support surface 12b2. The V-shaped groove 14b of the focus table 14 (moving member) also includes a second contact surface 14b1 and a second support surface 14b2. In the present embodiment, the first and second contact surfaces are configured to face each other. Similarly, the first and second support surfaces are also configured to face each other.

  With this configuration, when viewed from the relative movement direction (x-axis direction, optical axis direction), a rectangular shape surrounded by the opposing first and second contact surfaces and the opposing first and second support surfaces Space (space surrounded by 12b1, 12b2, 14b1, 14b2).

  By arranging the spacer member and the rolling member in this space, the guide mechanism can be configured in a state where at least a part of the region of the spacer member and the rolling member overlaps when viewed from the optical axis direction.

  This space will be supplemented. In the present embodiment, the V-shaped groove 12a (12b) of the base member 12 and the V-shaped groove 14a (14b) of the focus base 14 (moving member) face each other to form the above-described space. In the present embodiment, the first contact surface 12a1 (12b1) and the first support surface 12a2 (12b2) constituting these V-shaped grooves 12a (12b) constitute the same space within the same member. Contact surface and support surface) are in contact. The same applies to the V-shaped groove 14a (14b). In other words, in the same member, the contact surface and the support surface constituting the same space intersect each other.

  In the present embodiment, in the same member, the contact surface and the support surface constituting the same space form approximately 90 degrees (85 degrees to 95 degrees). This angle is the above-mentioned angle on the space side among the angles formed by the contact surface and the support surface forming the same space in the same member.

  Next, the guide mechanism will be described with reference to FIGS.

  As shown in FIG. 4, the bearing unit 19 is disposed in a space (two places in the left-right direction) surrounded by each V-shaped groove formed in the base member 12 and each V-shaped groove of the focus base 14 (moving member). Is done.

  The bearing unit 19 includes five balls 20 (rolling members) and a bearing plate 21. By increasing the number of balls 20 (rolling members), it is possible to increase the number of points that receive an impact at the time of dropping and to obtain the effect of preventing dents. The bearing plate 21 determines a relative position of each ball 20 (rolling member) in the optical axis direction in the bearing unit 19. The ball 20 (rolling member) can rotate with respect to the bearing plate 21.

  Each ball 20 (rolling member) of one bearing unit 19 has a lower surface (first contact surface) 12a1 of the V-shaped groove 12a of the base member 12 and a V-shaped groove 14a of the focus table 14 (moving member). Point contact is made with the upper surface (second contact surface) 14a1. On the other hand, the upper surface 12a2 (first support surface) of the V-shaped groove 12a of the base member 12 and the lower surface 14a2 (second support surface) of the V-shaped groove 14a of the focus base 14 (moving member) do not contact.

  Further, the ball 20 (rolling member) provided on the other bearing unit 19 includes a lower surface (first contact surface) 12b1 of the V-shaped groove 12b of the base member 12 and a V-shape of the focus table 14 (moving member). Point contact is made with the upper surface (second contact surface) 14b1 of the groove 14b. On the other hand, the upper surface 12b2 of the V-shaped groove 12b of the base member 12 and the lower surface 14b2 of the V-shaped groove 14b of the focus base 14 (moving member) do not contact.

  That is, the lower surface (first contact surface) 12a1 of the V-shaped groove 12a and the upper surface (second contact surface) 14a1 of the V-shaped groove 14a sandwich the ball 20 (rolling member). In addition, the lower surface (first contact surface) 12b1 of the V-shaped groove 12b and the upper surface (second contact surface) 14b1 of the V-shaped groove 14b sandwich the ball 20 (rolling member). Further, the focus base 14 (moving member) is positioned in the vertical direction (z-axis direction) with respect to the base member 12 by the bearing unit 19.

  As shown in FIG. 4, the first spacer member 22L1, the second spacer member 22L2, the third spacer member 22R1, and the fourth spacer member 22R2 are also arranged in the above-described space.

  The first spacer member 22L1 and the second spacer member 22L2 each have an upper surface 12a2 (first support surface) of the V-shaped groove 12a of the base member 12 and a V-shaped groove 14a of the focus table 14 (moving member). It contacts the lower surface 14a2 (second support surface). As will be described later, since the spacer member 22 has an effect of supporting and urging the focus base 14 (moving member) with respect to the base member 12, it is preferably in surface contact.

  On the other hand, the lower surface (first contact surface) 12a1 of the V-shaped groove 12a of the base member 12, which is the contact surface of the ball 20 (rolling member), and the upper surface of the V-shaped groove 14a of the focus table 14 (moving member). (Second contact surface) It is preferable not to contact 14a1. By configuring the spacer member so as not to contact the first and second contact surfaces, resistance during operation can be suppressed.

  Similarly, the third spacer member 22R1 and the fourth spacer member 22R2 each have an upper surface 12b2 (first support surface) of the V-shaped groove 12b of the base member 12 and a V-shape of the focus table 14 (moving member). Surface contact is made with the lower surface 14b2 (second support surface) of the groove 14b. On the other hand, the lower surface (first contact surface) 12b1 of the V-shaped groove 12b of the base member 12 and the upper surface (second contact surface) 14b1 of the V-shaped groove 14b of the focus base 14 (moving member) may not contact. preferable.

  The first spacer member 22L1 and the second spacer member 22L2 are arranged with the bearing unit 19 in between in the relative movement direction (optical axis direction, x-axis direction). Similarly, the third spacer member 22R1 and the fourth spacer member 22R2 are also arranged with the bearing unit 19 in the relative movement direction (optical axis direction, x-axis direction).

  Each spacer member 22 is disposed outside the range in which the bearing unit 19 moves when the focus table 14 (moving member) moves. In addition, each spacer member 22 is slidable with respect to the first and second support surfaces, respectively. It is good also as a structure hold | maintained so that each spacer member 22 may stay out of the movement range of the bearing unit 19. FIG. In this case, what is necessary is just to comprise so that it may be fixed with respect to any one of a 1st or 2nd support surface, and it can slide with respect to the other.

  The spacer member in the present embodiment has a cylindrical shape. The circular bottom surface comes into surface contact with the support portion. Although the side portion is set so as not to contact the contact surface, in this embodiment, the contact area can be reduced even when contact is made. The shape of the spacer member is not limited to this.

  In the present embodiment, the base member 12, the focus table 14 (moving member), and the ball 20 (rolling member) are metal members. On the other hand, the first to fourth spacer members 22L1, 22L2, 22R1, and 22R2 are elastically deformable and slidable resin materials. For example, a polyetherimide resin can be used. Thus, the hardness of the spacer member 22 is smaller than that of the base member 12, the focus table 14 (moving member), and the ball 20 (rolling member).

  The first and second support surfaces are urged away from each other by the elasticity of the spacer member 22. On the other hand, the first and second contact surfaces that contact the rolling member are configured to surround the same space as the first and second support surfaces so as to approach each other by this biasing force. That is, the spacer member 22 biases the second contact surface of the focus base 14 (moving member) and the first contact surface of the base member 12 in a direction approaching the vertical direction (z direction).

  Therefore, the second contact surface of the focus table 14 (moving member) and the first contact surface of the base member 12 reliably make point contact with the ball 20 (rolling member) in the bearing unit 19. Thereby, the effect of the exact guide along a relative movement direction is realizable.

  In addition, in this embodiment, it is possible to prevent the ball 20 (rolling member) from jumping out from each clamping portion.

  Furthermore, the spacer member and at least one of the rolling members provide a space-saving guide mechanism that is at least partially overlapped when viewed from the first direction and is not bulky in a plane perpendicular to the moving direction. it can.

  In the present embodiment, the focus mechanism is provided in the space between the left and right optical systems, so that the space can be used more efficiently.

  As described above, according to the present embodiment, an optical apparatus including a moving mechanism that can be accurately guided along the moving direction with a space-saving configuration can be provided.

  Note that the same effect can be obtained even if the relationship between the first support surface and the first contact surface is reversed (the vertical direction is reversed and the z-axis direction is reversed). In this case, the relationship between the second support surface and the second contact surface that are opposed to each of the first support surface and the contact surface is also reversed.

  In the present embodiment, two spaces surrounded by each V-shaped groove and where the spacer member and the rolling member are arranged are provided. The first contact surface, the first support surface, the second contact surface, and the second support surface are all in the direction in which these spaces are arranged (in the present embodiment, the left-right direction and the y-axis direction). Inclined. The angle of this inclination is about 45 degrees (40 degrees or more and 50 degrees or less). In other words, the first and second contact surfaces are evenly inclined by approximately 45 degrees with respect to a direction (y-axis direction or z-axis direction) orthogonal to the relative movement direction (x-axis direction). In other words, the binoculars are inclined with respect to the vertical direction or the horizontal direction.

  Supplementary explanation will be made with reference to FIG. A one-dot chain line L in FIG. 8 indicates a direction in which the spaces are arranged. The first contact surface angle Θ1 is approximately 45 degrees (40 degrees or more and 50 degrees or less) in the present embodiment. Similarly, the first support surface angle Θ2 is also approximately 45 degrees (40 degrees or more and 50 degrees or less). Further, the second contact surface angle Θ3 and the second support surface angle Θ4 are also approximately 45 degrees (40 degrees or more and 50 degrees or less).

  Since the first support surface and the second support surface are inclined as described above, the focus table 14 (moving member) can be supported in the vertical direction by the spacer member. Therefore, in addition to the reliable contact of the rolling member, it is possible to prevent the moving member from falling off in the direction orthogonal to the relative movement direction. In the present embodiment, contact between the base member 12 and the focus table 14 (moving member) can be prevented. The inclination angle is not limited to about 45 degrees, and this effect can be obtained if it is smaller than 90 degrees.

  The first contact surface and the second contact surface are inclined as described above, so that the rolling member is aligned in the vertical direction (vertical direction, z-axis direction) and the direction in which the spaces are arranged (left-right direction, y-axis). (In the direction), the focus table 14 (moving member) is surely touched. In other words, the above-described positioning in the two directions can be performed by contact of the rolling member. Thereby, the effect of the exact guide along a relative movement direction is realizable. The inclination angle is not limited to approximately 45 degrees, and this effect can be obtained if the inclination angle is 0 degrees or more (less than 90 degrees).

  In addition, in the present embodiment, as described above, the first contact surface and the first support surface that constitute the same space form approximately 90 degrees, and similarly, the second contact that constitutes the same space. The surface and the second support surface are also approximately 90 degrees. As will be described later, this angle is preferably 85 degrees or more and 95 degrees or less. Therefore, in order to satisfy this, the contact surface angles Θ1 and Θ2 and the support surface angles Θ3 and Θ4 are more preferably 42.5 degrees or more and 47.5 degrees or less.

  From another viewpoint, for example, a straight line connecting points where the balls 20 (rolling members) come into contact with the respective clamping portions is defined. The straight line is formed on the base member 12 and the focus table 14 (moving member) so as to be inclined with respect to a direction perpendicular to the vertical direction (z-axis direction) when viewed from the relative moving direction (optical axis direction, x-axis direction). It is sufficient that the clamping portion is constituted by the contact surface.

  In the present embodiment, the first contact surface and the first support surface are respectively configured to be opposed to the second contact surface and the second support surface of the focus table 14 (moving member). V-shaped grooves are formed in the member 12 and the focus table 14 (moving member). Rolling members and spacer members are arranged in a space formed by each V-shaped groove.

  The first contact surface and the support surface that form the V-shaped groove are in contact with each other. Similarly, the second contact surface and the support surface are in contact with each other. Even if they are not in direct contact with each other, it is only necessary to maintain a facing relationship through another surface, for example. For example, there may be a corner R between each surface as long as it does not contact the rolling member or the spacer member.

  Further, the angle of the V-shaped groove (the space-side angle among the angles formed by the contact surface and the support surface constituting the same space among the spaces in which the spacer member and the rolling member are arranged) is configured to be substantially vertical. ing. In other words, the first contact surface and the support surface intersect substantially vertically. Similarly, the second contact surface and the support surface intersect perpendicularly.

  This angle can also be implemented other than vertically. If this angle is smaller than 180 degrees, a V-shaped groove can be formed. That is, the angle on the space side among the angles formed by the first contact surface and the first support surface, and the angle on the space side among the angles formed by the second contact surface and the second support surface are less than 180 degrees. It is desirable to be. In other words, the present invention can be implemented as long as the normal vectors with the front direction of the first contact surface and the support surface (second contact surface and support surface) being positive have components facing each other.

  This angle is more preferably about 90 degrees (85 degrees or more and 95 degrees or less). With this configuration, the surface supported by the spacer member can be maximized with respect to the size of the rolling member, so that the urging is stabilized and more accurate guides can be achieved. When the moving member is moved, the spacer member can be prevented from being displaced or dropped.

  It is possible to implement the present invention even when the contact surface and the support surface constituting the same space are opposed to each other (the angle formed by these is 0 degree). For example, a surface connecting the first contact surface and the support surface (second contact surface and support surface) is further provided, and each surface is parallel and opposed so as to have a U shape when viewed from the relative movement direction. The case where it arrange | positions so that it may be considered.

  In this case, the first contact surface and the support surface (second contact surface and support surface) do not overlap when viewed from the direction (y-axis direction or z-axis direction) orthogonal to the relative movement direction (x-axis direction). It suffices if they are arranged in such a manner. In other words, the first contact surface and the support surface may be shifted in the relative movement direction (x-axis direction). Then, the focus table (moving member) and the base member are configured so that the first and second contact surfaces face each other as in the present embodiment. Similarly, the focus base (moving member) and the base member are configured so that the first and second support surfaces face each other.

  Thus, as long as the rolling member can be clamped, the shape constituting the space is not limited to the V-shaped groove.

  In the present embodiment, the bearing unit 19 includes a plurality of balls 20 (rolling members) having the same diameter and a bearing plate 21. However, as shown in FIG. 9, a bearing unit may be configured by two balls 20 (rolling members) disposed at both ends of the bearing plate 21 and a retainer 23 disposed between the two balls 20.

  In this bearing unit, the cylindrical diameter of the retainer 23 is smaller than the outer diameter of the balls 20 (rolling members) at both ends. With this configuration, the retainer 23 normally does not come into contact with the V-shaped grooves of the base member 12 and the focus table 14 (moving member).

  However, when receiving an impact, the retainer 23 comes into contact with each V-shaped groove. The retainer 23 can receive an impact in a wider area than the balls 20 (rolling members) at both ends. Therefore, it is possible to prevent the ball 20 (rolling member) from being dented on the sliding surface of each V-shaped groove.

  In this embodiment, positioning in the vertical direction (z-axis direction) is performed by the ball 20 (rolling member). Since positioning can be performed if there are three or more balls 20 (rolling members), the guide mechanism preferably includes a total of three balls 20 (rolling members).

  In this embodiment, the focus mechanism is manually operated from the outside, but the drive source of the moving member is not limited to this.

  FIG. 10 is a block diagram of an imaging apparatus 100 on which an interchangeable lens that is an example of the optical apparatus of the present invention is mounted. The imaging apparatus 100 includes a camera body 101 and a lens body 103 (interchangeable lens). In this embodiment, the lens body 103 is detachably attached to the camera body 101, but the camera body 101 and the lens body 103 may be integrally formed.

  A camera microcomputer 119 is built in the camera body 101. The release switch 120 is a switch for starting a release operation. The image sensor 110 captures a subject image and outputs an image signal to the camera microcomputer 119.

  A lens microcomputer 111 is built in the lens body 103. The camera microcomputer 119 and the lens microcomputer 111 communicate with each other via a communication contact 102.

  The lens microcomputer 111 is a state in the lens body 103 (zoom position, focus position, aperture value state, etc.) and information about the lens body 103 (open aperture value, focal length, data necessary for focal length calculation, etc.). Is transmitted to the camera body 101. The lens microcomputer 111 controls a shake correction system 112 (anti-vibration unit), a focus movement system 113, and an aperture movement system 114.

  The shake correction system 112 includes a shake correction moving system 115 and a lock / unlock moving system 116, and moves the correction lens based on a control signal calculated by the lens microcomputer 111 using an output of a sensor that detects the shake of the apparatus. Correct image blur.

  The lock / unlock movement system 116 locks the correction lens when the image blur correction is not performed, and unlocks the correction lens when the image blur correction is performed.

  The focus moving system 113 performs focusing by moving the focus adjustment lens based on the command value from the lens microcomputer 111 and the output of the position detection device.

  The diaphragm moving system 114 squeezes the diaphragm to a set position based on a command value from the lens microcomputer 111 or returns it to the open state.

  The image stabilization switch 117 is a switch that is turned on when performing image blur correction. The A / M switch 118 is a switch used when selecting auto focus or manual focus.

  11 and 12 are exploded perspective views of the shake correction system 112 (moving unit) as viewed from the rear. 13 and 14 are exploded perspective views of the shake correction system 112 as viewed from the front.

  The base member 121 holds the intermediate moving member 123 so that it can move relative to itself. Further, the intermediate moving member 123 holds the movable lens barrel 122 (moving member) so as to be movable relative to itself. Therefore, the movable lens barrel 122 (moving member) moves relative to the base member 121. Furthermore, the movable lens barrel 122 (moving member) holds the movable lens L101 (anti-vibration optical system). Accordingly, the movable lens L101 (anti-vibration optical system) moves relative to the base member 121.

  First, control of movement of the movable lens L101 (anti-vibration optical system) will be described. The electric board 126 is fixed to the base member 121 with screws 127. The electric board 126 controls the movement of the shake correction system 112.

  The flexible board 128 connects the electric element mounted on the shake correction system 112 and the electric board 126.

  The moving coils 129 </ b> P and 129 </ b> Y are attached to the movable lens barrel 122 (moving member) by adhesion, and power is supplied from the electric substrate 126 through the flexible substrate 128. The moving coils 129P and 129Y generate a vertical moving force and a horizontal moving force, respectively.

  The drive magnet 130, the back yoke 131, and the counter yoke 132 are provided for each of the moving coils 129P and 129Y. The drive magnet 130 is magnetized so that N poles and S poles are provided in the front-rear direction, and is arranged in the vertical direction so that different magnetic pole faces face the moving coil 129P, and different magnetic poles relative to the moving coil 129Y. It arrange | positions in the left-right direction so that a surface may face.

  The drive magnet 130 and the back yoke 131 are bonded and fixed so as to sandwich the base member 121. The opposing yoke 132 is fixed to the base member 121 with a fixing screw 135. The opposing yoke 132 forms an air layer for generating a moving force by the drive magnet 130 and the moving coils 129P and 129Y. The moving coils 129 </ b> P and 129 </ b> Y, the drive magnet 130, the back yoke 131, and the counter yoke 132 constitute an actuator that shifts the movable lens barrel 122 (moving member) in the vertical and horizontal directions within a plane orthogonal to the optical axis O. The

  The light emitting diode 133P (LED) generates position information in the vertical direction of the movable lens barrel 122 (moving member), and the light emitting diode 133Y generates position information in the left and right direction of the movable lens barrel 122 (moving member). Each of the light emitting diodes 133P and 133Y is mounted on the flexible board 128, and power is supplied from the electric board 126 through the flexible board 128. The light emitting diodes 133P and 133Y are fixed to the movable lens barrel 122 (moving member) together with the flexible substrate 128.

  The position detection element 134P (PSD) is arranged to face the light emitting diode 133P, and outputs a signal corresponding to the vertical shift of the movable lens barrel 122 (moving member). The position detection element 134Y is disposed so as to face the light emitting diode 133Y, and outputs a signal corresponding to the shift in the left-right direction of the movable lens barrel 122 (moving member). The position detection elements 134P and 134Y are mounted on the electric board 126.

  Light emitted from the light emitting diodes 133P and 133Y passes through a slit 122c formed in the movable lens barrel 122 (moving member) and a slit 121c formed in the base member 121. As a result, the light has a predetermined width and is detected by the light receiving portions of the position detection elements 134P and 134Y. Based on outputs from the position detection elements 134P and 134Y, position information of the movable barrel 122 (moving member) in the vertical direction and the horizontal direction can be obtained.

  In the present embodiment, the position of the movable lens barrel 122 (moving member) is detected by combining LEDs and PSD, but the position may be detected using other position detection means.

  Next, the relative movement guide mechanism will be described with reference to FIGS.

  On the outer periphery of the intermediate moving member 123, a V-shaped groove is formed in a direction orthogonal to the optical axis direction (x-axis direction). Two first V-shaped grooves 123a are formed along the vertical direction (z-axis direction). Two second V-shaped grooves 123b are formed along the left-right direction (y-axis direction).

  The base member 121 has a V-shaped groove 121a that extends in the vertical direction (z-axis direction) so as to face the first V-shaped groove 123a of the intermediate moving member 123. A space surrounded by the V-shaped groove 121a and the first V-shaped groove 123a and extending in the z-axis direction is referred to as a first space. The direction in which the first space extends is the relative movement direction of the intermediate movement member 123 with respect to the base member 121. Two first spaces are provided in the y-axis direction.

  The bearing unit 124 is disposed in the first space. The bearing unit 124 is a guide mechanism that moves the intermediate moving member 123 relative to the base member 121 only in the vertical direction (z-axis direction). The guide mechanism that relatively moves only in the vertical direction (z-axis direction) is referred to as a first guide mechanism. Since the configuration of the bearing unit 124 is the same as that of the first embodiment, the description thereof is omitted.

  As described above, the intermediate moving member 123 further includes the second V-shaped groove 123b in the left-right direction (y-axis direction). The movable lens barrel 122 (moving member) has a V-shaped groove 122a extending in the left-right direction (y-axis direction) facing the second V-shaped groove 123b of the intermediate moving member 123.

  A space surrounded by the second V-shaped groove 123b and the V-shaped groove 122a and extending in the y-axis direction is referred to as a second space. The extending direction of the second space is the relative movement direction of the movable lens barrel 122 (moving member) with respect to the intermediate moving member 123. Two spaces are provided in the z-axis direction.

  The bearing unit 124 is also disposed in the second space. The bearing unit 124 is a guide mechanism that moves the movable barrel 122 (moving member) relative to the intermediate moving member 123 only in the left-right direction (y-axis direction). This guide mechanism that is relatively moved only in the left-right direction (y-axis direction) is referred to as a second guide mechanism.

  With the configuration in which the first guide mechanism and the second guide mechanism are combined, the movable lens barrel 122 (moving member) is vertically moved (z-axis direction) with respect to the base member 121 via the intermediate moving member 123, and Guided so as to be relatively movable in the left-right direction (y-axis direction). That is, the movable lens barrel 122 (moving member), together with the movable lens L101, guides movement (shift, rotation, etc. in two directions) in a plane orthogonal to the optical axis O. However, the moving range of the movable lens barrel 122 (moving member) is limited by a mechanism described later.

  Hereinafter, the guide mechanism will be described in detail with reference to FIGS.

  FIG. 15 is a view of the shake correction system 112 as viewed from the front.

  16 is a cross-sectional view of the guide mechanism between the base member 121 and the intermediate moving member 123 cut along the line AA in FIG.

  FIG. 17 is a cross-sectional view of the guide mechanism between the base member 121 and the intermediate moving member 123 cut along the line BB in FIG.

  18 is a cross-sectional view of the guide mechanism between the base member 121 and the intermediate moving member 123 cut along the line CC cut in FIG.

  FIG. 19 is a cross-sectional view of the guide mechanism between the intermediate moving member 123 and the movable lens barrel 122 (moving member) cut along the DD fracture line of FIG.

  20 is a cross-sectional view of the guide mechanism between the intermediate moving member 123 and the movable lens barrel 122 (moving member) cut along the line E-E in FIG.

  FIG. 21 is a cross-sectional view of the guide mechanism between the intermediate moving member 123 and the movable lens barrel 122 (moving member) cut along the FF fracture line of FIG.

  First, the first guide mechanism provided in the first space will be described in detail with reference to FIGS.

  The ball 124a (rolling member) of the bearing unit 124 makes point contact with the front surface (first contact surface) 121a1 in the optical axis direction of the V-shaped groove 121a of the base member 121. At the same time, point contact is made with the rear surface (intermediate contact surface) 123a1 of the first V-shaped groove 123a of the intermediate moving member 123.

  On the other hand, as in the first embodiment, the ball 124 a (rolling member) is formed on the rear surface 121 a 2 (first support surface) of the V-shaped groove 121 a of the base member 121 and the first V-shaped groove 123 a of the intermediate moving member 123. It does not contact the front surface 123a2 (intermediate support surface). The relationship between the first contact surface and the intermediate contact surface is equal to the relationship between the first contact surface and the second contact surface in the first embodiment described above.

  As shown in FIGS. 20 and 21, the spacer member 125 is also the first V-shaped groove 121 a formed in the base member 121 and the first V-shaped groove 123 a formed in the intermediate moving member 123. Arranged in space. The spacer member 125 is arranged with the bearing unit 124 interposed therebetween in the vertical direction. Further, it is disposed outside the moving range of the bearing unit 124 when the intermediate moving member 123 moves.

  The spacer member 125 is formed on the rear surface (first support surface) 121a2 of the V-shaped groove 121a of the base member 121 and the front surface (intermediate support surface) 123a2 of the first V-shaped groove 123a of the intermediate moving member 123. Surface contact. On the other hand, the spacer member 125 does not contact the front surface (first contact surface) 121a1 of the V-shaped groove 121a of the base member 121 and the rear surface (intermediate contact surface) 123a1 of the first V-shaped groove 123a of the intermediate moving member 123. . The relationship between the first support surface and the intermediate support surface is equal to the relationship between the first support surface and the second support surface in the first embodiment described above.

  The first guide mechanism is configured as described above.

  Next, the second guide mechanism provided in the second space will be described in detail with reference to FIGS.

  As shown in FIG. 16, the ball 124a (rolling member) of the bearing unit 124 makes point contact with the front surface (further intermediate contact surface) 123b1 in the optical axis direction of the second V-shaped groove 123b of the intermediate moving member 123. . At the same time, point contact is made with the rear surface (second contact surface) 122a1 of the V-shaped groove 122a of the movable lens barrel 122 (moving member).

  On the other hand, the ball 124a (rolling member) includes a rear surface 123b2 (further intermediate support surface) of the second V-shaped groove 123b of the intermediate moving member 123 and a front surface 122a2 of the V-shaped groove 122a of the movable lens barrel 122 (moving member). It does not touch (second support surface). In this case, as described above, the intermediate moving member 123 functions as a base member and relatively moves the movable barrel 122 (moving member). The relationship between the intermediate contact surface and the second contact surface is equal to the relationship between the first contact surface and the second contact surface in the first embodiment described above.

  As shown in FIGS. 17 and 18, the spacer member 125 is also surrounded by the second V-shaped groove 123 b formed in the intermediate moving member 123 and the V-shaped groove 122 a formed in the movable lens barrel 122 (moving member). Arranged in the second space. The spacer member 125 is also disposed with the bearing unit 124 interposed therebetween. Further, it is arranged outside the moving range of the bearing unit 124 when the movable barrel 122 (moving member) moves.

  The spacer member 125 includes a rear surface (further intermediate support surface) 123b2 of the second V-shaped groove 123b of the intermediate moving member 123 and a front surface 122a2 (second support surface) of the V-shaped groove 122a of the movable lens barrel 122 (moving member). ) Is in surface contact. The spacer member 125 does not contact the front surface (further intermediate contact surface) 123b1 of the second V-shaped groove 123b and the rear surface (second contact surface) 122a1 of the V-shaped groove 122a. The relationship between the intermediate support surface and the second support surface is equal to the relationship between the first support surface and the second support surface in the first embodiment described above.

  The second guide mechanism is configured as described above.

  Therefore, in this embodiment, the base member and the moving member are held via the intermediate moving member. The spacer member 125 generates an urging force by the same mechanism as in the first embodiment. By this urging force, the front surface (first contact surface) 121a1 of the V-shaped groove 121a and the rear surface (intermediate contact surface) 123a1 of the first V-shaped groove 123a make point contact with the ball 124a (rolling member), and the ball 124a. (Rolling member) can be clamped. In addition, the front surface (further intermediate contact surface) 123b1 of the second V-shaped groove 123b and the rear surface (second contact surface) 122a1 of the V-shaped groove 122a1 are in point contact with the ball 124a (rolling member), and the ball 124a ( Rolling member).

  As described above, in the present embodiment, an optical apparatus (interchangeable lens) including a moving mechanism (anti-vibration mechanism) that can be accurately guided in the moving direction with a space-saving configuration can be provided. .

  Further, in the present embodiment, by combining a plurality of guide mechanisms, it is possible to guide a highly flexible movement with high accuracy with a simple configuration.

  In this embodiment, V-shaped grooves are formed in the base member 121, the movable lens barrel 122 (moving member), and the intermediate moving member 123 in order to form each clamping portion, but the ball 124a (rolling) The present invention is not limited to this as long as the member can be clamped.

  That is, a straight line connecting points where the balls 124a (rolling members) come into contact with the respective sandwiching portions is defined. A clamping portion is configured by the contact portions formed on the base member 121, the movable lens barrel 122 (moving member), and the intermediate moving member 123 so that the straight lines are inclined with respect to the relative moving direction of the movable lens L101. Just do it. For example, only the slopes and curved surfaces facing the ball 124a (rolling member) may be formed on the base member 121, the movable lens barrel 122 (moving member), and the intermediate moving member 123.

  In this embodiment, the base member 121 and the movable lens barrel 122 (moving member), the intermediate moving member 123 is a resin member, and the ball 124a (rolling member) is a metal member. The spacer member 125 is a slidable resin material that can be elastically deformed, and has a lower hardness than the resin member that forms the base member 121, the movable lens barrel 122 (moving member), and the intermediate moving member 123.

  Therefore, the spacer 124 causes the ball 124a (rolling member) to move from the front surface 121a1 of the V-shaped groove 121a and the rear surface 123a1 of the first V-shaped groove 123a and the front surface 123b1 and the V-shaped groove 122a of the second V-shaped groove 123b. It reliably contacts the rear surface 122a1. And it jumps out of these members.

  In the present embodiment, one intermediate moving member is interposed, but if a configuration in which a plurality of intermediate moving members are combined, a higher degree of freedom of movement can be obtained. In this case, the intermediate contact surface and the intermediate support surface in any intermediate moving member are configured to face the intermediate contact surface and the intermediate support surface in any intermediate moving member.

  In the present embodiment, two first spaces are provided that are surrounded by the first V-shaped grooves of the base member 121 and the intermediate moving member 123 and in which the spacer member and the rolling member are arranged. The first contact surface, the first support surface, the intermediate contact surface, and the intermediate support surface are all inclined with respect to the direction in which these spaces are arranged (in this embodiment, the left-right direction and the y-axis direction). . The angle of this inclination is about 45 degrees (40 degrees or more and 50 degrees or less). In other words, the first and intermediate contact surfaces are uniformly inclined by approximately 45 degrees with respect to a direction (y-axis direction or z-axis direction) orthogonal to the optical axis direction (x-axis direction). In other words, the binoculars are inclined with respect to the vertical direction or the horizontal direction.

  Similarly, two second spaces are provided that are surrounded by the second V-shaped grooves of the intermediate moving member 123 and the movable lens barrel (moving member) 122 and in which the spacer member and the rolling member are arranged. The further intermediate contact surface, the further intermediate support surface, the second contact surface, and the second support surface are all in the direction in which these spaces are arranged (in the present embodiment, the vertical direction and the z-axis direction). Inclined. The angle of this inclination is about 45 degrees (40 degrees or more and 50 degrees or less).

  With these configurations, both the intermediate moving member 123 and the movable lens barrel (moving member) 122 are supported in the optical axis direction by the spacer member. Therefore, in addition to the reliable contact of the rolling member to each contact surface, it is possible to prevent the rolling member from dropping in the direction perpendicular to the relative movement direction.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

12, 121 Base member 12a, 12b, 14a, 14b, 121a, 122a V-shaped groove 14 Focus stand (moving member)
19, 124 Bearing unit 20, 124a Ball (rolling member)
22, 125 Spacer member 122 Movable lens barrel (moving member)
123 Intermediate moving member 123a First V-shaped groove 123b Second V-shaped groove

Claims (20)

Optical system,
A base member having a first contact surface and a first support surface;
The optical system is held and has a second contact surface and a second support surface that face the first contact surface and the first support surface, respectively, and can be moved relative to the base member. A moving member,
A rolling member that is surrounded by the first and second contact surfaces and the first and second support surfaces, is disposed in a space extending in the direction of the relative movement, and contacts the first and second contact surfaces. When,
An optical apparatus comprising: two or more spacer members disposed in the space and in contact with the first and second support surfaces.   The optical apparatus according to claim 1, wherein the spacer member and the rolling member are arranged so that at least a part thereof is overlapped when viewed from the direction of the relative movement. A plurality of the spaces,
The optical apparatus according to claim 1, further comprising three or more rolling members. The angle on the space side among the angles formed by the first contact surface and the first support surface constituting the same space,
The angle on the space side among the angles formed by the second contact surface and the second support surface is 85 degrees or more and 95 degrees or less. The optical device according to Item. A plurality of the spaces,
The optical apparatus according to any one of claims 1 to 4, wherein the first and second support surfaces are inclined with respect to a direction in which the spaces are arranged.   The optical apparatus according to any one of claims 1 to 5, wherein the inclination of the first and second support surfaces is not less than 40 degrees and not more than 50 degrees. A plurality of the spaces,
The optical apparatus according to claim 1, wherein the first and second contact surfaces are inclined with respect to a direction in which the spaces are arranged.   The optical apparatus according to any one of claims 1 to 7, wherein an inclination of the first and second contact surfaces is not less than 40 degrees and not more than 50 degrees.   The optical apparatus according to claim 1, wherein the first and second contact surfaces are in point contact with the rolling member.   The optical apparatus according to any one of claims 1 to 9, wherein the first and second support surfaces are in surface contact with each of the spacer members.   11. The optical apparatus according to claim 1, wherein a hardness of the spacer member is smaller than a hardness of the base member, the moving member, and the rolling member.   The optical apparatus according to claim 1, wherein the rolling member does not contact the first and second support surfaces.   The optical apparatus according to claim 1, wherein the spacer member does not contact the first and second contact surfaces.   The optical apparatus according to any one of claims 1 to 13, wherein the spacer member is disposed outside a range in which the rolling member moves when the moving member is relatively moved.   The optical device according to any one of claims 1 to 14, wherein the spacer member is slidable with respect to at least one of the first support surface and the second support surface.   The optical apparatus according to claim 1, wherein the plurality of rolling members constitute a bearing unit by a bearing plate that rotatably holds the plurality of rolling members. The bearing unit has the rolling members at both ends of the bearing plate,
A cylindrical retainer is provided between the rolling members,
The optical apparatus according to claim 16, wherein a diameter of the retainer is smaller than an outer diameter of the rolling member. Optical system,
A base member having a first contact surface and a first support surface;
An intermediate moving member that has an intermediate contact surface and an intermediate support surface that face each of the first contact surface and the first support surface, and that can move relative to the base member;
Surrounded by the first contact surface and the intermediate contact surface and the first support surface and the intermediate support surface, the first contact surface is disposed in a first space extending in the direction of relative movement of the intermediate moving member. And a rolling member in contact with the intermediate contact surface;
Two or more spacer members disposed in the first space and in contact with the first and intermediate support surfaces;
The optical system is held, the intermediate moving member further includes an intermediate contact surface, a second contact surface and a second support surface that face each of the intermediate support surfaces, and are relatively moved with respect to the intermediate move member A movable member capable of
Surrounded by the intermediate contact surface and the second contact surface, the intermediate support surface and the second support surface, and disposed in a space extending in the direction of relative movement of the moving member, the intermediate contact surface and the second contact surface A rolling member in contact with the surface;
Two or more spacer members disposed in the space and in contact with the intermediate support surface and the second support surface;
Have
An optical apparatus, wherein the moving member moves relative to the base member. A plurality of the intermediate moving members;
The intermediate contact surface that the intermediate moving member has, and the intermediate support surface are respectively configured to face the intermediate contact surface and the intermediate support surface that the arbitrary intermediate moving member has,
A rolling member that is surrounded by the intermediate contact surface and the intermediate support surface and that is disposed in a space extending in the direction of relative movement of the intermediate moving member and that contacts the intermediate contact surface;
Two or more spacer members disposed in the space and in contact with the intermediate support surface;
The optical apparatus according to claim 18, comprising: The optical system is a pair of left and right optical systems,
The optical apparatus according to claim 1, wherein the moving member and the base member are disposed between the optical systems.

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