JP2015111202A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism that improves impact resistance of an imaging device when an impact is applied to the imaging device during photographing.SOLUTION: An imaging device includes: first optical members 10 and 20 that move between a collapsing position and a photographing position along a photographic optical axis A; a second optical member 30 that is arranged on the back surface side of the first optical members 10 and 20, approaches on the axis of the photographic optical axis A at the photographing position, and retreats from the axis of the photographic optical axis A at the collapsing position; a driving member 7 that moves the first optical members 10 and 20 forward and backward in the direction of the photographic optical axis A; and urging means 33 for urging the second optical member 30 in the direction of the photographic optical axis A. The driving member 7 has rotation regulation means 7g for engaging, when the second optical member 30 is at the photographing position, with the second optical member 30 to regulate the rotation of the second optical member 30.

Description

  The present invention relates to an imaging apparatus such as a digital camera.

  In an imaging device such as a digital camera, a photographing optical system that moves between a photographing position and a retracted position along the photographing optical axis, and a rear side of the photographing optical, moves on the photographing optical axis in a photographing state, In the retracted state, some include a retracting optical system that retracts from the photographing optical axis.

  Conventionally, as this type of imaging apparatus, a mirror frame (retraction optical system) that holds a mirror that bends an optical path is supported rotatably with respect to a fixed member, and the mirror frame is rotated by the urging force of the urging means. A technique for positioning on a photographing optical axis has been proposed (Patent Document 1). In this proposal, when the lens barrel is in the retracted state, the mirror frame is pressed against the urging force of the urging means with the rectilinear frame, thereby rotating the mirror frame in the direction of retracting from the photographing optical axis.

JP 2006-106071 A

  However, since the mirror frame is positioned on the photographing optical axis only by the urging force of the urging means when in the photographing state, the mirror frame is retracted more than necessary when an impact or the like is applied. May rotate, interfere with other parts, or deviate from the photographing optical axis. In Patent Document 1, if the mirror frame is surely positioned on the photographing optical axis, it is necessary to increase the urging force of the urging means, and the mirror when the mirror frame is retracted from the photographing optical axis is required. There is a problem that the driving load of the cylinder increases. For this reason, in the above-mentioned Patent Document 1, there is a limit in further improving the performance of the imaging apparatus including the retracting optical system.

  Accordingly, an object of the present invention is to provide a mechanism for improving the impact resistance of an imaging apparatus when an impact is applied to the imaging apparatus in a shooting state.

  Another object of the present invention is to provide a mechanism that can securely position the retracting optical system on the photographing optical axis without increasing the urging force of the urging means.

  In order to achieve the above object, an imaging apparatus according to the present invention is arranged on a back side of a first optical member that moves between a retracted position and a photographing position along a photographing optical axis, and the first optical member. A second optical member that enters the photographing optical axis at the photographing position and retreats from the photographing optical axis at the retracted position; the first optical member; and the second optical member. A driving member that moves at least the first optical member of the optical members in the direction of the photographing optical axis; and a biasing unit that biases the second optical member in the direction of the photographing optical axis. The drive member has a rotation restricting means for engaging the second optical member and restricting the rotation of the second optical member when the second optical member is in the photographing position. And

  The image pickup apparatus of the present invention is disposed on the back side of the first optical member that moves between the retracted position and the shooting position along the shooting optical axis, and the shooting is performed at the shooting position. A second optical member that enters on the axis of the optical axis and retracts from the axis of the photographing optical axis at the retracted position; at least the first optical member; and the second optical member. A driving member that moves the first optical member in the direction of the photographing optical axis; and a biasing unit that biases the second optical member in the direction of the photographing optical axis. When the second optical member moves from the retracted position to the photographing position, the second optical member is engaged with the second optical member to forcibly move the second optical member to the photographing position. It is characterized by.

  According to the present invention, when the second optical member is at the photographing position, the rotation restricting means engages with the second optical member and restricts the rotation of the second optical member, thereby capturing an image in the photographing state. The impact resistance of the imaging device when an impact or the like is applied to the device can be improved.

  According to the present invention, when the second optical member moves from the retracted position to the photographing position, the transition means forcibly engages the second optical member to force the second optical member to the photographing position. To migrate. Accordingly, the second optical member can be reliably positioned on the photographing optical axis without increasing the urging force.

It is sectional drawing which shows the state in which the digital camera which is an example of embodiment of this invention exists in a retracted position. It is sectional drawing which shows the state in which the digital camera shown in FIG. 1 exists in an imaging | photography position. It is a disassembled perspective view of a 1st optical axis unit. It is a disassembled perspective view of a 2 group lens unit. It is a disassembled perspective view of a barrier unit. It is a disassembled perspective view of a 2nd optical axis unit. It is a disassembled perspective view of a 3 group lens unit. It is the fragmentary perspective view which looked at the state where the drive shaft of the 3rd lens frame was inserted in the hole of a straight advance cylinder from the back. It is a rear view which shows the imaging | photography state of a 2nd optical axis unit. (A) is sectional drawing which shows the relationship between the drive part of the 2 group lens frame in a retracted position, and the 2 group drive part of a main-body part, (B) is a 2 group lens frame in the state which the cam cylinder rotated from the imaging position. It is sectional drawing which shows the relationship between this drive part and the 2nd group drive part of a main-body part. (C) is a sectional view showing the relationship between the driving unit of the second group lens frame and the second group driving unit of the main body at the photographing position. (A) is a front view corresponding to FIG. 10 (A) showing a state in which the second group lens frame is retracted from the photographing optical path, and (B) is corresponding to FIG. 10 (B) showing a state in which the second group lens frame is being retracted. FIG. FIG. 10C is a front view corresponding to FIG. 10C showing a state in which the second group lens frame enters the photographing optical path. (A) is a sectional view showing the relationship between the rectilinear cylinder and the third group lens unit at the retracted position, and (B) shows the relationship between the rectilinear cylinder and the third group lens unit when the cam cylinder is rotated from the photographing position. It is sectional drawing. (A) is sectional drawing which shows the relationship between the rectilinear cylinder and 3 group lens unit in the state which the cam cylinder further rotated from the state of FIG. 12 (B), (B) is the rectilinear cylinder and 3 group lens in a photographing position. It is sectional drawing which shows the relationship with a unit. (A) is a diagram showing the relationship between the drive unit of the barrier drive ring at the retracted position and the barrier drive unit of the main body, and (B) is the drive unit of the barrier drive ring at the photographing position and the barrier drive unit of the main body. It is a figure which shows the relationship. FIG. 15A is a front view corresponding to FIG. 14A showing the fully closed state of the barrier blades, and FIG. 15B is a front view corresponding to FIG. 14B showing the fully opened state of the barrier blades. (A) is a partial cross-sectional view showing an impact absorbing operation of the third group lens unit when an impact is applied in the shooting state, and (B) is an operation of the third group lens unit when the rotation restricting arm of the straight cylinder is not provided. It is a fragmentary sectional view which shows this as a comparative example. It is a fragmentary sectional view showing the state where the 3 group lens unit was forcibly moved to the photographing position. It is a fragmentary sectional view which shows the relationship between the rotation control axis | shaft of a 1st group lens barrel in a retracted position, and a 2nd group lens frame. (A) is a partial cross-sectional view showing a state where the first group lens and the second group lens are close to each other at the photographing position, and (B) is a partial cross section showing a state where the first group lens and the second group lens are separated from each other at the photographing position. FIG. (A) is a partial cross-sectional view showing the amount of overlap between the first group lens and the second group lens when the first group lens and the second group lens are respectively fixed to the first group lens frame and the second group lens frame by bonding. (B) is a partial cross-sectional view showing the amount of overlap between the fixed portion and the fixed portion when the first group lens and the second group lens are fixed to the first group lens frame and the second group lens frame by caulking, respectively. FIG. 20 is an enlarged cross-sectional view of a portion M in FIG. 19A showing the relationship between the rotation restriction shaft of the first group barrel and the hole of the second group lens frame. It is a partial cross-sectional view showing a state where the second group lens unit is forcibly shifted to a photographing state.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a state where a digital camera which is an example of an embodiment of the present invention is in a retracted position. FIG. 2 is a cross-sectional view showing a state in which the digital camera shown in FIG. 1 is at the photographing position. FIG. 3 is an exploded perspective view of the first optical axis unit. FIG. 4 is an exploded perspective view of the second group lens unit. FIG. 5 is an exploded perspective view of the barrier unit.

  As shown in FIGS. 1 to 3, the digital camera of the present embodiment intersects (orthogonally) the first optical axis unit 100 arranged along the first imaging optical axis A and the first imaging optical axis A. A second optical axis unit 200 disposed along the second imaging optical axis B. The first optical axis unit 100 is supported by the fixed cylinder 9, and the fixed cylinder 9 is fixed to the main body 80.

  The main body 80 supports the first optical axis unit 100 and the second optical axis unit 200. As shown in FIG. 3, the main body 80 is provided with a second group driving unit 80 a and a barrier driving unit 80 b facing each other so as to sandwich the second imaging optical axis B. In addition, a zoom cover 81 that covers the second optical axis unit 200 and a gear component 90b (see FIG. 6) described later is fixed to the main body 80.

  As shown in FIG. 3, the first optical axis unit 100 includes a rectilinear cylinder 7, a cam cylinder 8, a fixed cylinder 9, a first group lens unit 10, a second group lens unit 20, and a barrier unit 70.

  The rectilinear cylinder 7 regulates the rotation of the first group lens unit 10 and the second group lens unit 20. A plurality of protrusions 7 a are provided on the outer peripheral portion of the rectilinear cylinder 7, and the plurality of protrusions 7 a engage with grooves 8 a (see FIG. 2) formed on the inner peripheral portion of the cam cylinder 8. As a result, the rectilinear cylinder 7 is supported so as to be rotatable relative to the cam cylinder 8, and moves forward and backward along the first imaging optical axis A together with the cam cylinder 8. In addition, three rectilinear keys 7b are provided on the outer peripheral portion of the rectilinear cylinder 7, and the three rectilinear keys 7b are respectively engaged with three rectilinear grooves 9a formed on the inner peripheral portion of the fixed cylinder 9. To do. Thereby, the rotation of the rectilinear cylinder 7 is restricted with respect to the fixed cylinder 9.

  A cam portion 7f (see FIG. 8) is formed on the inner peripheral portion of the rectilinear cylinder 7, and the cam portion 7f is formed in a third group lens frame 32 of the second optical axis unit 200, which will be described later, in the movement operation to the retracted position. The drive shaft 32c (see FIG. 7) is pressed. By this pressing, the third group lens frame 32 and the third group lens unit 30 are retracted from the first photographing optical axis A and the second photographing optical axis B.

  A rotation restricting arm 7g and a transition control arm 7h (see FIG. 8) extending in a direction orthogonal to the first imaging optical axis A are provided facing each other at a position facing the cam portion 7f of the rectilinear cylinder 7. The rotation restricting arm 7g is disposed with a predetermined gap between the rotation restricting arm 7g and the drive shaft 32c of the third group lens frame 32, and restricts the rotation of the third group lens frame 32 when an impact is applied in the photographing state. Further, the transition control arm 7h is also arranged with a predetermined gap between the drive shaft 32c of the third group lens frame 32, and the third group lens frame 32 and the third group lens unit 30 are forcibly moved in the movement operation to the photographing position. Thus, the guide is guided in the direction of entering the first photographing optical axis A and the second photographing optical axis B.

  An opening 7n (see FIG. 8) formed between the rotation restricting arm 7g and the transition control arm 7h is used when the drive shaft 32c of the third group lens frame 32 is inserted into the hole 7e. Further, a transition control cam 7m (see FIG. 1) is formed on the inner peripheral portion of the rectilinear cylinder 7, and the transition control cam 7m presses a second group lens frame 22 described later in the transition operation to the photographing position. By this pressing, the second group lens frame 22 is forcibly guided in a direction (photographing state) in which it enters the first photographing optical axis A.

  The cam cylinder 8 supports the first group lens unit 10 and the second group lens unit 20 so as to be movable back and forth along the first imaging optical axis A. Three cam pins 8 b are provided on the outer peripheral portion of the cam cylinder 8, and the three cam pins 8 b engage with three cam grooves 9 b formed on the inner peripheral portion of the fixed cylinder 9, respectively. Thereby, the cam cylinder 8 is rotatably supported by the fixed cylinder 9 and moves forward and backward along the first imaging optical axis A along the three cam grooves 9 b of the fixed cylinder 9. A gear portion (not shown) is formed on the outer peripheral portion of the cam cylinder 8, and the gear section is connected to a cam cylinder driving device 90 (see FIG. 6) described later.

  The first group lens unit 10 includes a first group lens L1, a first group lens frame 11, and a first group lens barrel 12. The first group lens L1 is fixed to the first group lens frame 11 by an adhesive UV1 (see FIG. 20 (A)) or a fixing portion 11a (see FIG. 20 (B)) such as caulking. Fixed to the first group barrel 12.

  Three cam pins 12 a are formed on the outer peripheral portion of the first group barrel 12, and the three cam pins 12 a engage with three cam grooves 8 c formed on the inner peripheral portion of the cam barrel 8, respectively. In addition, three sub cam pins 12b are formed on the outer peripheral portion of the first group barrel 12, and the three sub cam pins 12b are respectively engaged with three cam grooves 8d formed on the inner peripheral portion of the cam barrel 8. To do. With these engagements, the first group barrel 12 is supported by the cam barrel 8, and moves forward and backward along the first imaging optical axis A according to the three cam grooves 8c and the three cam grooves 8d of the cam barrel 8. .

  Three rectilinear keys (not shown) are formed on the inner peripheral portion of the first group barrel 12, and the three rectilinear keys are respectively provided in three rectilinear grooves 7c formed on the outer peripheral portion of the rectilinear barrel 7. Engage. Thereby, the rotation of the first group barrel 12 is regulated by the rectilinear barrel 7. Further, as shown in FIG. 2, a rotation restricting shaft 12d is formed in the first group barrel 12. The rotation restricting shaft 12d is a position (photographing position) where the first photographing optical axis A and the center of the second group lens frame 22 coincide with each other, and the first group lens L1 and the second group lens L2 approach each other. It penetrates the hole 21d (see FIG. 4) and enters the hole 22f (see FIG. 4) of the second group lens frame 22. This approach restricts the rotation of the second group lens frame 22 when an impact is applied.

  The second group lens unit 20 is disposed on the back side of the first group lens unit 10, and as shown in FIG. 4, the second group lens L2, the second group base plate 21, the second group lens frame 22, the second group compression torsion spring 23, and A second group guide shaft 24 is provided. The second group lens L2 is fixed to the second group lens frame 22 by an adhesive UV2 (see FIG. 20A) or a fixing portion 22g (see FIG. 20B) such as caulking.

  Three cam pins 21 a are formed on the outer peripheral portion of the second group base plate 21, and the three cam pins 21 a engage with the three cam grooves 8 e formed on the inner peripheral surface of the cam cylinder 8. Thereby, the second group base plate 21 is supported by the fixed cylinder 9 and moves forward and backward along the first imaging optical axis A along the three cam grooves 8 e of the cam cylinder 8. Further, rectilinear keys 21b are formed at the base end portions of the three cam pins 21a, and each rectilinear key 21b is engaged with three rectilinear grooves 7d formed in the rectilinear cylinder 7, respectively. As a result, the rotation of the second group base plate 21 with respect to the rectilinear cylinder 7 is restricted. A hole 21d is formed in the flange portion of the second group base plate 21, and in the retracted state shown in FIG. 1 and in the photographing state in which the first group lens L1 and the second group lens L2 shown in FIG. The rotation restricting shaft 12d of the group barrel 12 passes therethrough.

  The second group lens frame 22 holds the second group lens L2. A fitting portion 22a is formed in the second group lens frame 22, and the fitting portion 22a is inserted into a hole 21e formed in the second group base plate 21 and arranged in parallel with the first photographing optical axis A. The guide shaft 24 is rotatably supported with respect to the second group base plate 21. As will be described later, the convex surface of the second group lens L2 may overlap the concave surface of the first group lens L1 in the first photographing optical axis A direction in the photographing state (see FIG. 20). The second group lens L2 may be a concave surface, and the first group lens L1 may be a convex surface.

  The second group lens frame 22 is urged by the second group compression torsion spring 23 in the direction of the photographing position where the first photographing optical axis A and the center of the second group lens frame 22 coincide (direction of arrow F in FIG. 4). . The second group lens frame 22 is formed with a drive unit 22b extending in the first imaging optical axis A direction, and the drive unit 22b contacts the second group drive unit 80a of the main body unit 80 in the retracted state.

  In addition, the protrusion 22c formed at a position facing the drive unit 22b of the second group lens frame 22 is at a position where the first photographing optical axis A and the optical axis of the second group lens frame 22 coincide with each other (shooting state). It contacts the position restricting portion 21c of the second group base plate 21. A hole 22 f is formed in the flange portion of the second group lens frame 22. As shown in FIG. 2, the first group lens L1 and the second group lens L2 approach the hole 22f at the photographing position where the first photographing optical axis A and the center of the second group lens frame 22 coincide with each other. The rotation restricting shaft 12d of the lens barrel 12 enters. Due to this approach, when an impact is applied, the rotation of the second group lens frame 22 is restricted. A constant gap K4 (see FIG. 21) is set between the hole 22f of the second group lens frame 22 and the rotation restricting shaft 12d of the first group barrel 12.

  The second group compression torsion spring 23 is disposed between the second group base plate 21 and the second group lens frame 22 and is inserted into the outer peripheral portion of the fitting portion 22 a of the second group lens frame 22. The coil portion 23a of the second group compression torsion spring 23 biases the second group lens frame 22 toward the subject (in the direction of arrow C in FIG. 4). Also, one of the two arm portions 23b of the second group compression torsion spring 23 is hooked into an SP hole 21f formed in the second group base plate 21, and the other is an SP hook (non-fixed) formed in the second group lens frame 22. (Shown). The second group compression torsion spring 23 rotates the second group lens frame 22 in the clockwise direction (arrow F direction) in FIG. 4 and biases it in the direction of entering the first photographing optical axis A.

  As shown in FIG. 5, the barrier unit 70 includes a barrier drive ring 71, a barrier spring 72, barrier blades 73 to 75, a fixing tape 76, and a barrier cover 77. The barrier drive ring 71 is rotatably supported by the first group lens barrel 12 and drives a pair of barrier blades 73 to 75 configured by a set of three. The barrier drive ring 71 is formed with a drive portion 71a extending in the first imaging optical axis A direction, and the drive portion 71a contacts the barrier drive portion 80b of the main body portion 80 in the retracted state.

  The pair of barrier blades 73 to 75 are disposed on the subject side of the first lens group L1 and open and close an opening 77a formed in the barrier cover 77. Holes 73a to 75a are respectively formed at the ends of the arm portions of the barrier blades 73 to 75, and the holes 73a to 75a are rotatably supported by a shaft 12c formed in the first group barrel 12.

  One of the pair of barrier springs 72 is hooked on an SP hook (not shown) formed on the barrier blade 73, and the other is hooked on an SP hook 71 b formed on the barrier drive ring 71. The pair of barrier springs 72 rotate the barrier drive ring 71 in the clockwise direction (in the direction of arrow G) in the drawing, whereby the barrier blades 73 to 75 are urged in a direction to open the opening 77a of the barrier cover 77. . The barrier cover 77 is fixed to the first group barrel 12 by a fixing tape 76.

  FIG. 6 is an exploded perspective view of the second optical axis unit 200. FIG. 7 is an exploded perspective view of the third group lens unit 30. FIG. 8 is a partial perspective view of the state in which the drive shaft 32c of the third lens frame 32 is inserted into the hole 7e of the rectilinear cylinder 7 as seen from the back. FIG. 9 is a rear view showing a shooting state of the second optical axis unit 200.

  As shown in FIGS. 6 to 9, the second optical axis unit 200 includes a third group lens unit 30, a third group spring 36, a fourth group lens unit 40, a fifth group lens unit 50, a fifth group spring 52, and a sixth group lens unit. 60, and main guide shafts 82 and 83. The second optical axis unit 200 includes a cam cylinder driving device 90, a fourth group driving device 91, a sixth group driving device 92, an optical filter F, and an image sensor S.

  The third group lens unit 30 includes a third group lens L3, a third group base plate 31, a third group lens frame 32, a third group compression torsion spring 33, a guide shaft 34, and a cover 35, as shown in FIG. As shown in FIG. 9, the third group lens unit 30 includes a main body portion by an SP hook 31 f formed on the third group base plate 31 and an SP hook 80 c formed on the main body portion 80. It is urged in a direction to abut against the 80 position restricting portion 80d.

  The third group base plate 31 is provided with a guide portion 31a and a steady portion 31b, and the guide portion 31a and the steady portion 31b are fitted to main guide shafts 82 and 83 (see FIG. 6) disposed in the main body portion 80. By doing so, it is supported so as to be movable back and forth along the second imaging optical axis B.

  The third group lens frame 32 holds the third group lens L3. The third group lens L3 is a prism that bends the light beam incident along the direction of the first imaging optical axis A in the direction of the second imaging optical axis B and guides it to the imaging surface of the image sensor S. A fitting portion 32 a is formed in the third group lens frame 32. The fitting portion 32 a is inserted between the support portions 31 c and 31 d formed on the third group base plate 31, and is attached to the third group base plate 31 by the third group guide shaft 34 disposed in a direction orthogonal to the second photographing optical axis B. And is rotatably supported.

  Further, the third group lens frame 32 is moved by the third group compression torsion spring 33 toward a position where the first photographing optical axis A and the second photographing optical axis B intersect at an angle of 90 ° (in the direction of arrow H in FIG. 7). Be energized by. The protrusion 32b formed on the side surface of the third group lens frame 32 is formed on the third group base plate 31 at a position where the first photographing optical axis A and the second photographing optical axis B intersect at an angle of 90 ° (photographing state). It abuts against the position restricting portion 31e (see FIG. 13B). Further, as shown in FIG. 8, the drive shaft 32c formed in the vicinity of the protruding portion 32b of the third group lens frame 32 is formed by the cam portion 7f, the rotation restricting arm 7g, and the transition control arm 7h of the rectilinear cylinder 7. Is inserted into the hole 7e.

  The third group compression torsion spring 33 is disposed between the support portion 31 c of the third group base plate 31 and the end of the fitting portion 32 a of the third group lens frame 32. The coil portion 33a of the third group compression torsion spring 33 biases the third group lens frame 32 in the direction of the support portion 31d of the third group base plate 31 (the direction of arrow D in FIG. 7). One of the two arm portions 23b of the third group compression torsion spring 33 is hooked on a recess (not shown) formed on the third group base plate 31, and the other is an SP hook formed on the third group lens frame 32. 32d. The third group compression torsion spring 33 rotates the third group lens frame 32 in the counterclockwise direction (the direction indicated by the arrow H in FIG. 7), and the first photographing optical axis A and the second photographing optical axis B are 90 as described above. Energize toward the crossing at an angle of °.

  The third group cover 35 covers the reflection surface L3a (see FIGS. 1 and 2) of the third group lens L3. Two fixed claws 35 a are formed on the third group cover 35, and the two fixed claws 35 a are engaged with the two protrusions 32 e of the third group lens frame 32, thereby allowing the third group lens frame 32 to be engaged. Fixed to.

  As shown in FIG. 6, the fourth group lens unit 40 includes a fourth group lens L4, a fourth group lens frame 41, a shutter unit 42, and a rack 43. The fourth group lens frame 41 holds the fourth group lens L4 and the shutter unit 42. The fourth group lens frame 41 is formed with a guide portion 41a and a steady portion 41b, and the guide portion 41a and the steady portion 41b are fitted to main guide shafts 82 and 83 arranged in the main body portion 80. Accordingly, the fourth group lens frame 41 is supported so as to be movable back and forth along the second photographing optical axis B.

  The rack 43 is disposed on the fourth group lens frame 41 and moves forward and backward along the second imaging optical axis B together with the fourth group lens frame 41. The rack 43 is screwed onto the screw shaft 91 b of the fourth group drive device 91. By this screwing, the fourth group lens unit 40 is guided by the lead of the screw shaft 91b of the fourth group driving device 91 and can move forward and backward in the direction of the second photographing optical axis B.

  The fifth group lens unit 50 includes a fifth group lens L5 and a fifth group lens frame 51, as shown in FIG. The fifth group lens frame 51 holds the fifth group lens L5. The fifth group lens frame 51 is provided with a guide part 51a and a steadying part 51b, and the guiding part 51a and the steadying part 51b are fitted to main guide shafts 82 and 83 arranged in the main body part 80. Thus, the fifth group lens frame 51 is supported so as to be movable back and forth along the second photographing optical axis B. Further, as shown in FIG. 9, the fifth group lens unit 50 includes an SP hook 51c formed on the fifth group lens frame 51 and a fifth group spring 52 hooked on the SP hook 80e formed on the main body 80. The main body 80 is urged in a direction in contact with the position restricting portion 80f.

  The sixth group lens unit 60 includes a sixth group lens L6, a sixth group lens frame 61, and a rack 62, as shown in FIG. The sixth group lens frame 61 holds the sixth group lens L6. The sixth group lens frame 61 is provided with a guide part 61a and a steadying part 61b, and the guiding part 61a and the steadying part 61b are fitted to main guide shafts 82 and 83 arranged in the main body part 80. Accordingly, the sixth group lens frame 61 is supported so as to be movable back and forth along the second imaging optical axis B.

  The rack 62 is disposed in the sixth group lens frame 61 and moves forward and backward along the second imaging optical axis B together with the sixth group lens frame 61. The rack 62 is screwed onto the screw shaft 92 b of the sixth group drive device 92. By this screwing, the sixth group lens unit 60 is guided by the lead of the screw shaft 92b of the sixth group driving device 92 and can move forward and backward along the second imaging optical axis B.

  As shown in FIG. 6, the cam cylinder driving device 90 includes a zoom motor 90a, a gear component 90b, and a gear base plate 90c. The zoom motor 90a and the gear component 90b are supported by the gear base plate 90c and fixed to the main body 80. The fourth group drive device 91 includes a stepping motor 91a and a screw shaft 91b, and is fixed to the main body 80. The sixth group drive device 92 has a stepping motor 92 a and a screw shaft 92 b and is fixed to the main body 80.

  Next, the operation of the second group lens frame 22 constituting the second group lens unit 20 will be described with reference to FIGS.

  FIG. 10A is a cross-sectional view showing the relationship between the drive unit 22b of the second group lens frame 22 and the second group drive unit 80a of the main body 80 at the retracted position. FIG. 10B is a cross-sectional view showing the relationship between the drive unit 22b of the second group lens frame 22 and the second group drive unit 80a of the main body 80 in a state where the cam cylinder 8 is rotated from the photographing position. FIG. 10C is a cross-sectional view showing the relationship between the drive unit 22b of the second group lens frame 22 and the second group drive unit 80a of the main body 80 at the photographing position.

  FIG. 11A is a front view corresponding to FIG. 10A showing a state in which the second group lens frame 22 is retracted from the first photographing optical axis A. FIG. FIG. 11B is a front view corresponding to FIG. 10B showing a state in which the second group lens frame 22 is being retracted. FIG. 11C is a front view corresponding to FIG. 10C showing a state in which the second group lens frame 22 has entered the first photographing optical axis A. FIG.

(1) Operation for Transition to Shooting State From the retracted state shown in FIG. 10 (A) and FIG. 11 (A), the cam cylinder 8 is rotated in the direction of arrow K (counterclockwise direction) in FIG. When driven, the cam cylinder 8 moves to the subject side (feeding direction) along the three cam grooves 9b of the fixed cylinder 9 while rotating. By this movement, the second group lens unit 20 moves to the subject side according to the three cam grooves 8e of the cam cylinder 8. By this movement, as shown in FIG. 10B, the rotation restricting portion 22e formed on the drive portion 22b of the second group lens frame 22 and the rotation restricting portion 80h formed on the second group drive portion 80a of the main body portion 80. Is released.

  With this release, the second group lens frame 22 rotates about the guide shaft 24 in the clockwise direction in FIG. 11 by the spring force of the charged second group compression torsion spring 23 as shown in FIG. Then, an approaching operation on the first photographing optical axis A is started. Thereafter, as shown in FIG. 10C, the cam portion 22 d formed on the driving portion 22 b of the second group lens frame 22 moves away from the cam portion 80 g formed on the second group driving portion 80 a of the main body portion 80.

  Then, the second group lens frame 22 rotates to a position where the protrusion 22c of the second group lens frame 22 contacts the position restricting portion 21c of the second group base plate 21, as shown in FIG. By this contact, the first photographing optical axis A and the optical axis of the second group lens frame 22 coincide with each other, and a photographing state is established.

(2) Shifting operation to the retracted state From the photographing state shown in FIGS. 10C and 11C, the cam cylinder 8 is driven to rotate in the direction of arrow L (clockwise direction) in FIG. Then, the cam cylinder 8 moves in the direction of the main body 80 (retraction direction) according to the three cam grooves 9b of the fixed cylinder 9 while rotating. By this movement, the second group lens unit 20 moves in the direction of the main body 80 (retraction direction) according to the three cam grooves 8 e of the cam cylinder 8. By this movement, the cam portion 22d of the second group lens frame 22 comes into contact with the cam portion 80g of the main body portion 80 as shown in FIG.

  With this contact, the second group lens frame 22 is guided while charging the second group compression torsion spring 23 by the cam action of the cam portion 22d and the cam portion 80g of the main body portion 80, as shown in FIG. The shaft 24 is rotated in the counterclockwise direction in FIG.

  After that, as shown in FIG. 10A, the contact between the cam portion 22d of the second group lens frame 22 and the cam portion 80g of the main body portion 80 is released, and the rotation restricting portion 22e of the second group lens frame 22 becomes the main body portion. 80 abuts against the rotation restricting portion 80h. As a result of this contact, the second group lens frame 22 is retracted from the first photographing optical axis A as shown in FIG.

  Next, the operation of the third group lens unit 30 will be described with reference to FIGS. 12 and 13.

  FIG. 12A is a cross-sectional view showing the relationship between the rectilinear cylinder 7 and the third group lens unit 30 at the retracted position. FIG. 12B is a cross-sectional view showing the relationship between the rectilinear cylinder 7 and the third group lens unit 30 with the cam cylinder 8 rotated from the photographing position. FIG. 13A is a cross-sectional view showing the relationship between the rectilinear cylinder 7 and the third group lens unit 30 in a state where the cam cylinder 8 is further rotated from the state of FIG. FIG. 13B is a cross-sectional view showing the relationship between the rectilinear cylinder 7 and the third group lens unit 30 at the photographing position.

(1) Transition Operation to Shooting State When the cam cylinder 8 is rotationally driven in the arrow K direction (counterclockwise direction) in FIG. 3 by driving of the cam cylinder driving device 90 from the retracted state shown in FIG. The cam cylinder 8 moves in the direction toward the subject (feeding direction) according to the three cam grooves 9b of the fixed cylinder 9 while rotating. At this time, the rectilinear cylinder 7 also moves in the direction toward the subject together with the cam cylinder 8. By this movement, as shown in FIG. 12B, the contact between the movement restricting portion 7k formed on the rectilinear cylinder 7 and the movement restricting portion 31g formed on the third group base plate 31 is released.

  With this release, the third group base plate 31 starts an approach operation on the first photographing optical axis A by the spring force of the charged third group spring 36. Further, the third group lens frame 32 is rotated counterclockwise about the guide shaft 34 by the spring force of the charged third group compression torsion spring 33 to start an approach operation.

  Thereafter, as shown in FIG. 13B, when the rectilinear cylinder 7 moves to the photographing position, the cam portion 7f of the rectilinear cylinder 7 moves away from the drive shaft 32c of the third group lens frame 32. Then, the third group base plate 31 moves to a position where it comes into contact with the position restricting portion 80d (see FIG. 9) of the main body portion 80. Further, the third group lens frame 32 rotates to a position where the protrusion 32 b of the third group lens frame 32 contacts the position restricting portion 31 e of the third group base plate 31. By this contact, the third group lens unit 30 enters the first photographing optical axis A and the second photographing optical axis B. With this approach, the first photographing optical axis A and the second photographing optical axis B intersect at an angle of 90 °, and a photographing state is set.

(2) Transition operation to the retracted state When the cam cylinder 8 is driven to rotate in the arrow L direction (clockwise direction) in FIG. 3 by driving the cam cylinder driving device 90 from the photographing state shown in FIG. The cam cylinder 8 moves in the direction of the main body 80 (retraction direction) according to the three cam grooves 9b of the fixed cylinder 9 while rotating. At this time, the rectilinear cylinder 7 also moves in the direction of the main body 80 together with the cam cylinder 8. By this movement, as shown in FIG. 13A, the drive shaft 32 c of the third group lens frame 32 is pressed by the cam portion 7 f of the rectilinear cylinder 7.

  By this pressing, the third group lens frame 32 is rotated around the guide shaft 34 in the clockwise direction while charging the third group compression torsion spring 33 by the cam action of the cam portion 7 f of the rectilinear cylinder 7, and is retracted. To start. Further, as shown in FIG. 12B, the third group base plate 31 has the third group spring 36 by the action of the cam portion 7 i formed on the rectilinear cylinder 7 and the cam portion 31 f formed on the third group base plate 31. The movement toward the image sensor S side is started while charging.

  Thereafter, as shown in FIG. 12A, the contact between the cam portion 7 i of the rectilinear cylinder 7 and the cam portion 31 f of the third group base plate 31 is released, and the movement restricting portion 7 k of the rectilinear cylinder 7 is moved to the third group base plate 31. It contacts the movement restricting portion 32g. By this contact, the third group lens unit 30 is kept retracted from the first photographing optical axis A and the second photographing optical axis B and is in a retracted state.

  Next, the opening / closing operation of the barrier blades 73 to 75 will be described with reference to FIGS. 14 and 15.

  FIG. 14A is a diagram showing the relationship between the drive unit 71a of the barrier drive ring 71 and the barrier drive unit 80b of the main body 80 at the retracted position. FIG. 14B is a diagram illustrating the relationship between the drive unit 71a of the barrier drive ring 71 and the barrier drive unit 80b of the main body 80 at the photographing position. FIG. 15A is a front view corresponding to FIG. 14A showing the fully closed state of the barrier blades 73 to 75. FIG. 15 (B) is a front view corresponding to FIG. 14 (B) showing the fully opened state of the barrier blades 73 to 75.

(1) Transition Operation to Shooting State From the retracted state shown in FIGS. 14 (A) and 15 (A), the cam barrel 8 is driven in the direction of arrow K (counterclockwise direction) in FIG. The cam cylinder 8 moves in the direction of the subject (feeding direction) according to the three cam grooves 9b of the fixed cylinder 9 while being rotated. By this movement, the first group lens unit 10 moves in the direction of the subject along the three cam grooves 8 c of the cam cylinder 8. By this movement, the barrier driving ring 71 starts to rotate in the clockwise direction around the first photographing optical axis A by the spring force of the charged barrier spring 72.

  Following this rotation, the barrier blades 73 to 75 start to rotate counterclockwise in FIG. 15 about the shaft 12c formed in the first group barrel 12. Thereafter, as shown in FIG. 14B, the drive unit 71 a of the barrier drive ring 71 is separated from the barrier drive unit 80 b of the main body unit 80. Then, as shown in FIG. 15B, the barrier blades 73 to 75 are retracted from the opening 77a of the barrier cover 77 and are in a photographing state.

(2) Transition to the retracted state From the photographing state shown in FIGS. 14B and 15B, the cam cylinder 8 is driven in the direction of arrow L (clockwise direction) in FIG. When driven to rotate, the cam cylinder 8 moves in the direction of the main body 80 (retraction direction) according to the three cam grooves 9b of the fixed cylinder 9 while rotating. By this movement, the first group lens unit 10 moves in the direction of the main body 80 according to the three cam grooves 8 c of the cam cylinder 8.

  By this movement, the drive unit 71a of the barrier drive ring 71 comes into contact with the barrier drive unit 80b of the main body unit 80 as shown in FIG. Due to this contact, the barrier drive ring 71 causes the barrier spring 72 to be centered on the first imaging optical axis A by the action of the drive unit 71a and the barrier drive unit 80b of the main body unit 80 as shown in FIG. Rotate counterclockwise while charging.

  Following this rotation, the barrier blades 73 to 75 rotate around the axis 12c formed in the first group barrel 12 in the clockwise direction of FIG. By this rotation, the barrier blades 73 to 75 enter the opening 77a of the barrier cover 77, cover the first group lens L1, and enter a retracted state.

  Next, an impact absorbing operation of the third lens unit 30 when an impact is applied to the camera in the shooting state will be described with reference to FIGS.

  FIG. 16A is a partial cross-sectional view showing an impact absorbing operation of the third lens unit 30 when an impact is applied in the shooting state. FIG. 16B is a partial cross-sectional view showing the operation of the third lens unit 30 when the rotation restricting arm 7g of the rectilinear cylinder 7 is not provided as a comparative example.

  When an impact is applied to the camera in the shooting state shown in FIG. 13B, the third group lens frame 32 rotates clockwise about the guide shaft 34 while charging the third group compression torsion spring 33. At this time, the drive shaft 32c of the third group lens frame 32 is engaged with the rotation restricting arm 7g of the rectilinear cylinder 7, as shown in FIG.

  By this engagement, the rotation of the third group lens frame 32 is restricted, and the third group lens frame 32 rotates counterclockwise around the guide shaft 34 by the spring force of the charged third group compression torsion spring 33. . Then, as shown in FIG. 13B, the projection 32b of the third group lens frame 32 again comes into contact with the position restricting portion 31e of the third group base plate 31, and can return to the photographing state.

  Also, by providing the rotation restricting arm 7g on the rectilinear cylinder 7, when an impact is applied to the camera in the photographing state, the drive shaft 32c of the third group lens frame 32 is moved to the rectilinear cylinder 7 as shown in FIG. This eliminates the contact with the flat portion 7m of the rectilinear cylinder 7 out of the hole 7e. As a result, it is possible to prevent the third group lens frame 32 from interfering with parts arranged around the third group lens unit 30 or causing malfunctions.

  Next, an operation for forcibly moving the third group lens unit 30 to the photographing position will be described with reference to FIGS. FIG. 17 is a partial cross-sectional view showing a state in which the third group lens unit 30 is forcibly moved to the photographing position.

  When moving from the retracted position shown in FIG. 12 (A) to the photographing position shown in FIG. 13 (B), as shown in FIG. 17, the movement restricting portion 7k of the straight cylinder 7 and the movement restricting portion 31g of the third group base plate 31 Is released. With this release, when the third group lens unit 30 does not move to the first photographing optical axis A side for some reason such as friction, the transition control arm 7h of the rectilinear barrel 7 engages with the drive shaft 32c of the third group lens frame 32. . By this engagement, the third group lens unit 30 can be forcibly moved to the first photographing optical axis A side.

  Next, the relationship between the rotation restricting shaft 12d of the first group barrel 12 and the second group lens frame 22 constituting the second group lens unit 20 will be described with reference to FIG. 11 and FIGS.

  FIG. 18 is a partial cross-sectional view showing the relationship between the rotation restricting shaft 12d of the first group barrel 12 and the second group lens frame 22 at the retracted position. FIG. 19A is a partial cross-sectional view showing a state in which the first group lens L1 and the second group lens L2 are close to each other at the photographing position. FIG. 19B is a partial cross-sectional view showing a state where the first group lens L1 and the second group lens L2 are separated from each other at the photographing position.

  FIG. 20A shows the amount of overlap between the first group lens L1 and the second group lens L2 when the first group lens L1 and the second group lens L2 are fixed to the first group lens frame 11 and the second group lens frame 22 by bonding, respectively. It is a fragmentary sectional view showing K2. FIG. 20B shows the amount of overlap K3 between the fixed portion 11a and the fixed portion 22g when the first group lens L1 and the second group lens L2 are fixed to the first group lens frame 11 and the second group lens frame 22 by caulking, respectively. FIG.

  As shown in FIG. 18, in the retracted state, the rotation regulating shaft 12 d of the first group barrel 12 enters the hole 21 d of the second group base plate 21. At this time, as shown in FIG. 11A, the second group lens frame 22 is in a state of being retracted from the axis of the first photographing optical axis A, so that the rotation restricting shaft 12d of the first group barrel 12 is It does not enter the hole 22f of the second group lens frame 22.

  As shown in FIG. 19A, when the first group lens L1 and the second group lens L2 approach each other in the shooting state, the rotation restricting shaft 12d of the first group lens barrel 12 passes through the hole 21d of the second group base plate 21. It penetrates and enters the hole 22f of the second group lens frame 22. This approach restricts the rotation of the second group lens frame 22.

  At this time, as shown in FIG. 20A, the engagement amount K1 in the first photographing optical axis A direction with respect to the hole 22f of the second group lens frame 22 of the rotation restricting shaft 12d of the first group barrel 12 is the first group lens. The overlap amount K2 between L1 and the second group lens L2 is larger. That is, the relationship of engagement amount K1> overlap amount K2 is set. Further, as shown in FIG. 20B, the engagement amount K1 in the first photographing optical axis A direction with respect to the hole 22f of the second group lens frame 22 of the rotation restricting shaft 12d of the first group lens barrel 12 is the first group lens frame. 11 is greater than the overlap amount K3 between the fixed portion 11a and the fixed portion 22g of the second group lens frame 22. That is, the relationship of engagement amount K1> overlap amount K3 is set. Here, the first group lens L1 corresponds to an example of the first lens of the present invention, and the first group lens frame 11 corresponds to an example of the first lens frame of the present invention. The second group lens L2 corresponds to an example of the second lens of the present invention, and the second group lens frame 22 corresponds to an example of the second lens frame of the present invention.

  In the photographing state, as shown in FIG. 19B, when the first group lens L1 and the second group lens L2 are separated from each other, the rotation restricting shaft 12d of the first group lens barrel 12 is the hole 21d of the second group base plate 21. And retract from the hole 22f of the second group lens frame 22.

  Thus, in this embodiment, when the first group lens L1 and the second group lens L2 approach each other in the photographing state, the rotation of the second group lens frame 22 can be restricted. Thereby, it is possible to prevent the second group lens frame 22 from interfering with components arranged around the second group lens unit 20, and to bring the distance between the first group lens L1 and the second group lens L2 close to the limit. Can do.

  Next, an impact absorbing operation of the second group lens unit 20 when an impact is applied to the camera in the shooting state will be described with reference to FIGS. FIG. 21 is an enlarged cross-sectional view of a part M of FIG.

  When an impact is applied to the camera in the photographing state shown in FIG. 11C, the second group lens frame 22 rotates counterclockwise about the guide shaft 24 while charging the second group compression torsion spring 23. At this time, as shown in FIG. 21, the second group lens frame 22 is counterclockwise by a gap K4 formed between the rotation restricting shaft 12d of the first group lens barrel 12 and the hole 22f of the second group lens frame 22. And engages with the rotation restricting shaft 12 d of the first group barrel 12.

  By this engagement, the rotation of the second group lens frame 22 is restricted, and the second group lens frame 22 is rotated clockwise around the guide shaft 24 by the spring force of the charged second group compression torsion spring 23. Then, as shown in FIG. 11C, the projection 22c of the second group lens frame 22 comes into contact with the position restricting portion 21c of the second group base plate 21 and can return to the photographing state.

  Next, an operation for forcibly moving the second group lens unit 20 to the photographing position will be described with reference to FIGS. 10, 18, 19, and 22. FIG. 22 is a partial cross-sectional view showing a state in which the second group lens unit 20 is forcibly shifted to a photographing state.

  When shifting from the retracted state shown in FIGS. 10A and 18 to the photographing state shown in FIGS. 10B and 19A, the rotation restricting portion 22e formed on the drive portion 22b of the second group lens frame 22 is used. And the rotation restricting portion 80h formed in the second group driving portion 80a of the main body portion 80 are released. By this release, when the second group lens frame 22 does not shift onto the first photographing optical axis A for some reason such as friction, the transition control cam 7m of the rectilinear cylinder 7 is moved to the second group lens frame 22 as shown in FIG. Engage with the outer peripheral portion and press the outer peripheral portion toward the first imaging optical axis A. By this pressing, the second group lens frame 22 can be forcibly shifted to the photographing state.

  As described above, in the present embodiment, when an impact is applied to the camera in the shooting state, the rotation of the second group lens frame 22 and the third group lens frame 32 constituting the second optical member is restricted. Thereby, it is possible to prevent the second group lens unit 20 and the third group lens unit 30 from interfering with other parts or causing malfunctions, and the impact resistance of the camera can be improved.

  In the present embodiment, since the second optical member is forcibly shifted to the photographing state, the second urging force of the second group compression torsion spring 23 or the third group compression torsion spring 33 is not increased. The optical member can be reliably positioned on the first photographing optical axis A.

  The configuration of the present invention is not limited to that exemplified in the above embodiment, and the material, shape, dimensions, form, number, arrangement location, and the like can be changed as appropriate without departing from the scope of the present invention. It is.

  For example, in the above-described embodiment, a camera with a bent collapsible structure having the first photographing optical axis A and the second photographing optical axis B is exemplified, but a camera with a straight collapsible structure having only the first photographing optical axis A may be used. .

  Further, in the above embodiment, the rotation restriction shaft 12d for restricting the rotation of the second group lens frame 22 is provided in the first group barrel 12 disposed on the subject side with respect to the second group lens unit 20. You may provide in the member arrange | positioned from the lens unit 20 at the image surface side.

  Furthermore, in the above-described embodiment, the rotation restricting arm 7g and the transition control arm 7h that are engaged with the drive shaft 32c of the third group lens frame 32 are provided on the rectilinear cylinder 7, respectively. It may be provided.

L1 1st group lens L2 2nd group lens L3 3rd group lens 7 Rectilinear cylinder 7g Rotation restricting arm 7g Transition control arm 7m Transition control cam 11 1st group lens frame 11a, 22g Fixing part 10 1st group lens unit 12 1st group lens barrel 12d Rotation restriction Axis 20 Second group lens unit 21 Second group base plate 21d Hole 22 Second group lens frame 22f Hole 30 Third group lens unit 31 Third group base plate 32 Third group lens frame

Claims (7)

A first optical member that moves along a photographic optical axis between a retracted position and a photographing position;
A second optical member that is disposed on the back side of the first optical member, enters the axis of the imaging optical axis at the imaging position, and retreats from the axis of the imaging optical axis at the retracted position;
A driving member that moves at least the first optical member of the first optical member and the second optical member in the direction of the photographing optical axis;
Biasing means for biasing the second optical member in the direction of the photographing optical axis,
The drive member includes a rotation restricting unit that engages with the second optical member and restricts the rotation of the second optical member when the second optical member is in the photographing position. An imaging device. A first optical member that moves along a photographic optical axis between a retracted position and a photographing position;
A second optical member that is disposed on the back side of the first optical member, enters the axis of the imaging optical axis at the imaging position, and retreats from the axis of the imaging optical axis at the retracted position;
A driving member that moves at least the first optical member of the first optical member and the second optical member in the direction of the photographing optical axis;
Biasing means for biasing the second optical member in the direction of the photographing optical axis,
The driving member engages with the second optical member to force the second optical member to the photographing position when the second optical member moves from the retracted position to the photographing position. An image pickup apparatus having a transfer means for transferring.   The first optical member includes a first lens, the second optical member includes a second lens, and the driving member enters on the axis of the first lens and the photographing optical axis. The imaging apparatus according to claim 1, wherein the second lens is moved in the direction of the photographing optical axis.   The first optical member includes a first lens, the second optical member includes a second lens, and the driving member enters on the axis of the first lens and the photographing optical axis. The second lens is moved in the direction of the photographing optical axis, and the rotation restricting means is provided on a second lens frame that holds the second lens at a position where the first lens and the second lens approach each other. The imaging apparatus according to claim 1, wherein the rotation of the second lens is restricted by engaging in a direction of the photographing optical axis.   The engagement amount K1 of the rotation restricting unit with respect to the second lens frame is larger than an overlap amount K2 between the first lens and the second lens in the direction of the photographing optical axis. Imaging device.   The amount of engagement K1 of the rotation restricting means with respect to the second lens frame is such that the first lens frame holding the first lens in the direction of the photographic optical axis and the second fixing portion by caulking the first lens and the second lens frame. The image pickup apparatus according to claim 4, wherein the amount of overlap with the fixed portion by caulking of the second lens in the lens frame is greater than K3.   The second optical member includes a prism that guides the light beam incident on the first optical member along the photographing optical axis to the image sensor by bending the light beam in a direction intersecting the photographing optical axis. The imaging device according to claim 1 or 2.

Images