JP6460671B2 - Optical equipment - Google Patents

Description

  The present invention relates to an optical apparatus such as a lens barrel.

  Patent Document 1 discloses a thermal caulking that deforms the resin of the lens holding frame with a high-temperature punch and fixes the outer edge of the lens over the entire circumference.

JP 2010-145504 A

  In order to reduce the size of the lens in the radial direction due to the recent demand for miniaturization, members in the radial direction of the lens may be deformed by the heat during heat caulking, and the optical performance may deteriorate due to the tilting of the lens. is there.

  An object of the present invention is to provide an optical apparatus capable of achieving a compact configuration while preventing deterioration of optical performance due to thermal caulking.

The optical apparatus of the present invention is provided in the lens, a lens holding member that holds the lens, a guide unit that guides the movement of the lens holding member in the optical axis direction, and the lens holding member. It has an engaging portion for engaging the part, and the lens holding member includes a fixing portion for fixing the front Symbol lenses by thermal caulking the application of heat and pressure, to the fixed portion in the circumferential direction of the lens And a non-thermally crimped portion that is not thermally crimped, and the guide portion includes a first guide bar and a second guide bar that respectively extend in the optical axis direction, and the engagement portion includes: A first engagement portion that engages with the first guide bar; and a second engagement portion that engages with the second guide bar; and the entire first engagement portion and the second engagement portion . whole engagement portion, in perpendicular to the optical axis plane of the lens, the Le Characterized in that it is located within an angular range connecting both ends of the non-thermal caulking portion in the circumferential direction with the optical axis in FIG.

  ADVANTAGE OF THE INVENTION According to this invention, the optical apparatus which can achieve a small structure can be provided, preventing the deterioration of the optical performance by heat crimping.

It is a front view of the crimping nail | claw of this invention, and a perspective view which shows the formation method. (Example 1) It is a block diagram of the optical apparatus of this invention. (Examples 1, 2, and 3) It is a perspective view of the 1st moving member and lens holding part which are shown in FIG. (Example 1) FIG. 4 is an exploded perspective view of the rack shown in FIG. 3 as seen from a different direction. (Example 1) FIG. 4 is a partially enlarged perspective view and a sectional view of FIG. 3. (Example 1) FIG. 4 is a partially enlarged perspective view of FIG. 3. (Example 1) It is sectional drawing which shows the relationship between the lens holding | maintenance part and sleeve part which are shown in FIG. (Example 1) It is a front view of the crimping nail | claw of this invention. (Example 2) It is sectional drawing and the front view of the lens drive mechanism of this invention. Example 3 It is a schematic sectional drawing explaining the conventional heat crimping. It is a schematic sectional drawing for demonstrating the problem of the conventional heat crimping shown in FIG.

  FIG. 2 is a block diagram of the optical apparatus (imaging device). The optical device of the present embodiment is a lens-integrated camera, but the present invention can also be applied to a camera system (imaging system) in which a lens barrel is detachably attached to a camera body (imaging device body). The optical apparatus can also be applied to a single-lens reflex camera, a digital still camera, a digital video camera, and the like. The lens barrel has a photographing optical system that forms an optical image of a subject. Furthermore, the optical device is not limited to a camera, and may be a liquid crystal projector, binoculars, a microscope, or the like.

  In FIG. 2, the left side is the subject side, and the right side is the image side. The photographing optical system of the present embodiment has, for example, a four-group variable magnification optical system. L1 is a first lens unit having a positive refractive power that is fixed during zooming. L2 is a second lens group (a variable power lens group or a zoom lens group) having a negative refractive power that performs a variable power operation for adjusting the focal length by moving in the optical axis direction, as indicated by an arrow. L3 is a third lens unit having a fixed positive refractive power. L4 is a fourth lens group (focus lens group) having a positive refractive power that performs a focusing operation (focus adjustment) by moving in the optical axis direction as indicated by an arrow.

  Reference numeral 1 denotes a front lens barrel that holds the first lens unit L1, 2 denotes a first moving member (lens holding member) that holds a second lens unit L2 as a first variable power lens unit, and 3 denotes a third lens. A fixed member 4 that holds the group L3, and a second moving member 4 that holds the fourth lens group L4. An image pickup means (image pickup element) 30 including a CCD or CMOS, a low-pass filter, an infrared cut filter, and the like is fixed and held by a rear barrel (not shown), and photoelectrically converts an optical image formed by the photographing optical system.

  Reference numeral 31 denotes a camera signal processing circuit that performs predetermined amplification, gamma correction, and the like on the output of the imaging means 30. Reference numeral 32 denotes a microcomputer, which is a control means for transmitting / receiving and processing a large number of signals and controlling each part of the optical apparatus. Reference numeral 33 denotes a recording means for recording an image signal processed by the microcomputer 32 and other recording conditions. Reference numeral 50 denotes a zoom switch for instructing a zooming operation. Reference numeral 51 denotes a focus switch for the photographer to consciously instruct a manual focus operation (focusing operation). 52 is a power switch.

  The first moving member 2 is a movable member supported by two guide bars 101 and 102, which will be described later, so as to be movable in the optical axis direction of the photographing optical system. The second moving member 4 is a movable member supported by two guide bars (not shown in FIG. 2) so as to be movable in the optical axis direction.

  Reference numeral 5 denotes a diaphragm device that adjusts the amount of light incident on the imaging means 30. The driving unit 6 moves two diaphragm blades in opposite directions to change the aperture diameter. Reference numeral 34 denotes an aperture sensor circuit that detects the rotational position of the drive magnet of the drive unit 6 with a Hall element. A camera signal processing circuit 31 performs predetermined amplification, gamma correction, and the like on the signal from the imaging means 30 and outputs the result to the microcomputer 32. The microcomputer 32 outputs an aperture drive signal to the aperture drive circuit 37 according to an input signal from the camera signal processing circuit 31 and an input signal such as the rotation amount of the aperture drive unit from the aperture sensor circuit 34 to adjust the light amount. .

  Reference numeral 8 denotes a zoom motor as drive means (actuator) for moving the second lens unit L2 in the optical axis direction and performing a zooming operation. The feed screw (lead screw) 8a rotated by the zoom motor 8 meshes with the rack 7 installed on the first moving member 2 that is guided and held so as to freely move in the optical axis direction. A driving force from the zoom motor 8 is applied to the rack. When the zoom motor 8 rotates, the first moving member 2 moves in the optical axis direction. The feed screw 8a is arranged coaxially with the rotor constituting the zoom motor and parallel to the optical axis. The feed screw 8a is made of, for example, SUS or iron. 8b is a motor sheet metal.

  Reference numeral 9 denotes a zoom initial position sensor composed of a photo interrupter. The zoom initial position sensor 9 optically detects the switching between light shielding and light transmission caused by movement of a light shielding portion (not shown) formed on the first moving member 2 in the optical axis direction. A reference position in the optical axis direction (initial zoom position) is detected.

  When the power switch 52 is turned on, the zoom motor 8 receives a drive signal from the zoom drive circuit 35 under the control of the microcomputer 32. Using the initial zoom position detected by the initial zoom position sensor 9 as a reference, the first moving member 2 moves to a predetermined position and stands by. The zoom motor 8 performs position control corresponding to the operation of the zoom switch 50 by the number of steps from the initial zoom position. When the zoom switch 50 is operated, the microcomputer 32 determines in which direction the movement direction is operated, and the zoom operation is performed.

  Reference numeral 11 denotes a focus motor as drive means (actuator) that moves the fourth lens unit L4 in the optical axis direction and performs a focusing operation. A rack member 10 installed on a second moving member 4 that is guided and held so as to freely move in the optical axis direction is engaged with a lead screw (feed screw) 11a rotated by a focus motor 11. When the focus motor 11 rotates, the second moving member 4 moves in the optical axis direction. The feed screw 11a is arranged coaxially with the rotor constituting the focus motor and parallel to the optical axis.

  Reference numeral 12 denotes a focus initial position sensor composed of a photo interrupter. The initial focus position sensor 12 optically detects the switching between light shielding and light transmission due to movement of a light shielding portion (not shown) formed in the second moving member 4 in the optical axis direction, and the second moving member 4 A reference position in the optical axis direction (initial focus position) is detected.

  When the power switch 52 is turned on, the focus motor 11 receives a drive signal from the focus drive circuit 36 under the control of the microcomputer 32. Using the initial focus position detected by the initial focus position sensor 12 as a reference, the second moving member 4 moves to a predetermined position and stands by. The focus motor 11 performs position control corresponding to the operation of the zoom switch 50 and the focus switch 51 by the number of steps from the initial focus position. During autofocus, the focus drive circuit 36 energizes the focus motor 11 in accordance with an input signal from the microcomputer 32, and drives the fourth lens group L4 in the optical axis direction.

  FIG. 3 is a perspective view of the first moving member 2 and the lens holding unit applicable to the first moving member 2 of the first embodiment. FIG. 3A is a perspective view seen from the subject side, and FIG. 3B is a perspective view seen from the image side.

  As shown in the figure, the first moving member 2 has a main body portion 20, a sleeve portion 21, an anti-rotation portion 22, and a rack holding portion. The sleeve portion 21 and the rotation preventing portion 22 may be integrated with the main body portion 20 or may be separate.

  The main body 20 holds the second lens unit L2 in the center and has a substantially hollow cylindrical shape. The sleeve portion 21 is a hollow cylindrical member that is fixed to the main body portion 20 and extends in the optical axis direction, and has a through hole 21a into which a guide bar (first guide bar) 101 is inserted. The rotation stopper 22 is fixed to the main body 20 and has a recess 22 into which a guide bar (second guide bar) 102 is inserted. The anti-rotation part 22 suppresses the rotation of the main body part 20 in a plane perpendicular to the optical axis. As a result, the first moving member 2 is supported by the guide bars 101 and 102 so as to be movable in the optical axis direction.

  The rack holding portion holds the rack 7 rotatably, and has two blocks 23 and 24 each having a shaft hole portion and a concave portion 25 therebetween. In the recess 25, the rack 7 is housed in a partially protruding state. Both ends of a shaft portion 75 of the main rack 70 to be described later are rotatably supported by shaft hole portions 23a and 23b of the blocks 23 and 24, respectively. A part of the rack 7 protruding from the recess 25 engages with a feed screw 8a of the zoom motor 8 which is a driving means.

  4 (a) and 4 (b) are exploded perspective views of the rack 7 as seen from different directions. The rack 7 includes a main rack 70, a sub-rack 40, a pinching spring 50, and a side spring 60, and is miniaturized. The main rack 70 and the subrack 40 are composed of POM, PC, etc., and are composed of a mold, metal cutting, or the like.

  The main rack 70 has an engaging portion (first member) 71 and a shaft portion 75.

  As shown in FIGS. 3 and 4, the engaging portion 71 has an L shape when viewed from the front, is coupled to the shaft portion 75 at one end of the L shape, protrudes from the coupling portion, and is substantially parallel to the shaft portion 75. It is configured as an arm part that is bent. 71 a is a contact surface as an inner surface of an end portion engaged with the shaft portion 75 of the engaging portion 71.

  Main teeth 72 are formed on the feed screw side of the engaging portion 71. The main teeth 72 engage with the thread of the feed screw 8a and receive the driving force of the zoom motor 8 from the feed screw 8a. The surface 73 opposite to the feed screw 8a of the engaging portion 71 functions as a locking surface that locks the arm portion 52 of the pinching spring 50 and the arm portion 62 of the side spring 60, as shown in FIG. To do. As shown in FIG. 4A, two stoppers (regulating means) 74 as protrusions protruding from the main teeth 72 toward the feed screw side are formed on the inner side (shaft portion 75 side) of the main teeth 72 of the engaging portion 71. Is formed.

  As shown in FIG. 4, the shaft portion 75 penetrates the coil portion 51 of the pinch spring 50, the shaft hole portion 42 of the main body portion 41 of the subrack 40, and the coil portion 61 of the biased spring 60 in this order. The shaft portion 75 is rotatably supported by the shaft hole portions 23 a and 24 a of the two blocks 23 and 24 of the rack holding portion of the first moving member 2. The shaft portion 75 functions as a rotation shaft of the rack 7.

  5A is a partially enlarged perspective view in the vicinity of the rack 7 in FIG. 3, and FIG. 5B is a cross-sectional view through the central axis of the shaft portion 75 in FIG. 5A.

  As shown in FIG. 5 (b), the block 23 is provided with a through hole 23a, the block 24 is provided with a through hole 24a, and the central axis of the through holes 23a and 24a is a one-dot chain line parallel to the optical axis. In the XX axis | shaft shown, it corresponds. The XX axis functions as a rotation axis of the rack 7. The rack 7 can rotate as a whole around the XX axis, and the subrack 40 can rotate relative to the main rack 70 around this axis. The tapered portion 76 of the shaft portion 75 is inserted into the through hole 23a, and the cylindrical portion 77 of the shaft portion 75 is inserted into the through hole 24a. The cylindrical portion 77 has a substantially columnar shape.

  The subrack (second member) 40 prevents tooth skipping due to a disturbance impact such as dropping, and has a main body portion 41 and an engaging portion 44. The subrack 40 is configured to be rotatable with respect to the main rack 70.

  The main body 41 has a shape in which cylinders of different sizes are combined in a state in which their central axes are aligned, and has a cylindrical shaft hole portion 42 centered on the central axis. The shaft portion 75 of the main rack 70 is inserted into the shaft hole portion 42. Near the center of the main body 41, there is a flange 43 having a diameter larger than that of the adjacent cylindrical portions. The flange 43 divides a storage portion in which the pinching spring 50 is stored and a storage portion in which the offset spring 60 is stored.

  In FIG. 5, the pinching spring 50 is disposed between the flange 43 and the contact surface 71 a of the engaging portion 71, and the bias spring 60 is disposed between the flange 43 and the block 24. A force from the bias spring 60 acts on the flange 43. The flange 43 has an arm portion 43a extending in the optical axis direction. In this embodiment, the arm part 43a is arrange | positioned on the opposite side (between a TT line and an optical axis) with respect to the motor 8 regarding the TT line mentioned later.

  The engaging portion 44 protrudes to the outside of the main body portion 41 and extends substantially parallel to the optical axis. Opposing teeth 45 are formed on the feed screw side of the engaging portion 44. The opposing teeth 45 are configured to be engageable with the feed screw 8a.

  As shown in FIG. 4A, two stoppers (regulating means) 46 as protrusions protruding from the counter teeth 45 are formed on the inner side (the main body 41 side) of the engaging portion 44. Each stopper 46 contacts the stopper 74 of the main rack 70 to prevent the engagement portion 44 from rotating further toward the feed screw. As a result, even if an urging force is applied between the engaging portions 71 and 44 by the pinching spring 50, the opposing tooth 45 does not contact the feed screw 8a in a normal state. Note that it is sufficient that the protrusion as the stopper is provided on at least one of the engaging portions 71 and 44.

  The pinching spring 50 is a second urging means that applies a urging force between the engaging portion 71 and the sub-rack 40 so that the main teeth 72 and the opposing teeth 45 approach each other about the XX axis as a rotation center. The pinching spring 50 is composed of, for example, a torsion spring. The pinching spring 50 is provided between the flange 43 of the sub-rack 40 and the contact surface 71 a of the engaging portion 71, and has a coil portion 51 and arm portions 52 and 53. The shaft portion 75 of the main rack 70 passes through the coil portion 51. As shown in FIGS. 3 and 5, the arm portion 52 is locked to the surface 73 of the main rack 70, and the arm portion 53 is locked to the arm portion 43 a of the flange 43 of the subrack 40. As will be described later, a portion where the arm portion 52 of the pinching spring 50 biases the engaging portion 71 and a portion where the arm portion 53 of the pinching spring 50 biases the arm portion 43a of the subrack 40 are both described later. It is provided on the opposite side to the zoom motor 8 (between the optical axis and the TT line) with respect to the -T line.

  The bias spring 60 is a first biasing means that applies a biasing force that biases the main teeth 72 against the feed screw 8a. The side spring 60 has a coil part 61 and an arm part 620d3. The shaft portion 75 of the main rack 70 passes through the coil portion 61. The arm 62 is locked to the surface 73 of the main rack 70 as shown in FIGS. The arm portion 63 is locked to the sleeve portion 21 of the first moving member 2. A portion where the arm portion 62 of the bias spring 60 urges the engaging portion 71 is provided on the opposite side to the zoom motor 8 (between the optical axis and the TT line) with respect to the TT line described later. Further, the portion where the arm portion 63 of the biased spring 60 biases the first moving member 2 is provided on the opposite side to the zoom motor 8 (between the optical axis and the TT line) with respect to the TT line described later. Is preferred.

  The bias spring 60 applies an elastic force in the axial direction between the block 24 and the flange 43, and biases the first moving member 2, the guide bar 101, the rack 7 and the feed screw 8a in a direction parallel to the optical axis. As a result, the backlash is shifted to one side, and the backlash of fitting or meshing can be prevented.

  Specifically, the subrack 40 is applied with an urging force 62 in the optical axis direction of the offset spring 60 in the direction shown in FIG. As a result, the contact surface 41a, which is the surface on the contact surface 71a side of the main body 41 shown in FIGS. 4B and 4B, is urged so as to contact the contact surface 71a of the engagement portion 71. The phase shift between the main teeth 72 and the counter teeth 45 is prevented. The biasing force 62 of the biasing spring 60 is also used to bias the first moving member 2 toward the shaft hole portion 23a with respect to the tapered portion 76 of the main rack 70, and the first moving member 2 is moved in the optical axis direction. We suppress backlash.

  6 is a partially enlarged perspective view of FIG. 3 in the vicinity of the rack 7 attached to the first moving member 2.

  In the temporarily assembled state of the first moving member 2, the main rack 70 is urged around the XX axis by the urging force 62 b of the side spring 60, and the main teeth 72 of the main rack 70 and the feed screw 8 a of the zoom motor 8 are connected. Engagement is energized. The first moving member 2 removes play between the sleeve portion 21 and the rotation preventing portion 22 and the guide bars 101 and 102 by the urging force 63a at the other end of the bias spring 60, and the guide bars 101 and 102 are moved against the guide bars 101 and 102. The first moving member 2 can move with high accuracy.

  Further, the pinching spring 50 applies a biasing force 53a to the arm 43a of the sub-rack 40 to the flange 43 to generate a rotational force about the XX axis, and the stopper 46 is a stopper of the main rack 70. It is urged to contact 74. The main rack 70 is biased by the biasing force 52 from the arm portion 52 of the pinching spring 50.

  FIG. 7A is a cross-sectional view drawn by a straight line connecting the center of the second lens unit L2 and the center of the sleeve portion 21. FIG. The second lens group L2 is positioned in the optical axis direction with respect to the moving member by contacting the lens receiving portion 20 of the first moving member 2, and is fitted to the lens fitting portion 20b of the first moving member 2. Thus, positioning in the radial direction is performed. In other words, in order to position the second lens unit L2 with high accuracy, the perpendicularity between the sleeve portion 21 and the lens receiving portion 20 of the first moving member 2 and the accuracy of the distance between the sleeve portion 21 and the lens fitting portion 20b are important. become.

  FIG.7 (b) is an enlarged view of the broken-line part of Fig.7 (a). The second lens group L2 contacts the lens receiving portion 20, and the lens center position is fitted and supported by the lens fitting portion 20b. The resin claw 20c is deformed by a heat caulking tool (not shown), and a caulking claw 20d is formed so as to sandwich the lens receiver 20 and the second lens group L2. The crimping claw 20d is generally formed over the entire circumference.

  For example, in the case of the thermal caulking of Patent Document 1, it is as shown in FIG. FIG. 10A is a schematic sectional view showing a state before thermal crimping, FIG. 10B is a schematic sectional view in thermal crimping, and FIG. 10C is a schematic sectional view showing a state after thermal crimping. FIG.

  A crimping punch 300 shown in FIG. 10A has a crimping claw forming portion 300a that is heated to a high temperature and deforms the resin by heat. As shown in FIG. 10B, when the caulking nail forming portion 300a is pressed against the caulking nail 400a of the lens holding frame 400 that holds the lens 500, the resin portion 400a is melted by heat and the caulking nail forming portion 300a It transforms into a shape. Thereby, as shown in FIG. 10C, the deformed crimping claw 400 b fixes the lens 500.

  FIG. 11 is a schematic cross-sectional view illustrating heat transfer during heat caulking. 11A is a schematic cross-sectional view showing a state before thermal caulking, FIG. 11B is a schematic cross-sectional view during thermal caulking, and FIG. 11C is a schematic cross-sectional view showing a state after thermal caulking. FIG. In FIG. 11, the sleeve portion 410 is provided so that the optical axis is substantially parallel to the straight line XX connecting the centers of the hole portion 412 and the hole portion 414 that are fitted to a guide shaft (not shown). F indicates the flow of heat during heat caulking. When heat is transmitted from the high temperature caulking punch 300 to the lens holding frame 400 and the lens 500 and the stress accumulated in the inside is released, and the sleeve portion 410 is deformed, the parallel relationship between the optical axis and the straight line XX is lost. . That is, the fall of the sleeve portion 410 leads to the fall and decentering of the lens 500, which causes deterioration of the optical performance of the optical device.

  FIG. 1A is a front view of the caulking claw 20d according to the first embodiment. The caulking claw 20d is a fixing portion that is formed by heat caulking that applies heat and pressure, and fixes (presses) the outer edge of the second lens unit L2. FIG. 1A is a plan view perpendicular to the optical axis O of the second lens unit L2.

  In order to reduce the size of the lens barrel, it is effective to reduce the distance between the second lens unit L2 and the sleeve portion 21. In this embodiment, the angle θ connecting the central axis of the guide bars 101 and 102 and the optical axis O is set to 100 degrees to 140 degrees, preferably 110 degrees to 130 degrees. By setting the angle θ to about 120 degrees, the radial direction of the second lens unit L2 can be made smaller than when the angle θ is set to about 180 degrees, for example. However, the influence of heat at the time of heat caulking is increased by downsizing.

  In the present embodiment, a plurality of (three) crimping claws 20d are provided at equal intervals, and no heat caulking resin exists between the two adjacent caulking claws 20d (not heat caulking). The heat caulking portions 20e, 20f, and 20g are provided. By holding the second lens unit L2 at equal intervals, it is possible to prevent the second lens unit L2 from falling, but when this is negligible, for example, the crimping claw 20d is also formed in the non-thermal crimping portion 20f. Then, the second lens unit L2 may be held in a wider range.

  In this embodiment, in FIG. 1A, the sleeve portion 21 is disposed within an angular range connecting both ends of the non-thermal crimping portion 20e and the optical axis O in the circumferential direction of the lens outside the non-thermal crimping portion 20e. . The rotation prevention part 22 is arrange | positioned in the angle range of the non-thermal crimping part 20g outside the non-thermal crimping part 20g. The guide bars 101 and 102 function as a guide unit that guides the movement of the first moving member 2 in the optical axis direction. The sleeve portion 21 engages with the guide bar 101, and the rotation preventing portion 22 functions as an engaging portion that engages with the guide bar 102.

  In FIG. 1B, the crimping claw forming portion 3000a of the thermal crimping tool 3000 is pressed against the resin portion 20c indicated by the dotted line in FIG. 7B of the first moving member 2 to heat and pressurize the crimping jaw 20d. It is a perspective view which shows the state currently formed.

  If the resin portion 20c is provided over the entire circumference of the lens as in the prior art, the straight line connecting the optical axis O and the sleeve portion 21 or the straight line connecting the optical axis O and the anti-rotation portion 22 in a plane perpendicular to the optical axis. The resin part 20c in the area will be caulked. For this reason, there exists a possibility that heat may be transmitted to the sleeve part 21 and the rotation stopper part 22 in a short time. On the other hand, in the present embodiment, since the sleeve portion 21 and the non-rotating portion 22 are provided within the range of the non-thermal caulking portion, the heat transfer distance is extended to prevent thermal deformation. The present invention also covers the first moving member before heat caulking in which the resin portion 20c is provided not on the entire circumference of the lens but on a part thereof.

  As described above, according to the present embodiment, the lens can be prevented from being tilted or decentered with respect to the guide portion when the lens is fixed to the lens holding frame by thermal caulking, and deterioration of optical performance due to thermal caulking can be prevented. A compact configuration can be achieved.

  In this embodiment, both the sleeve portion 21 and the rotation preventing portion 22 are disposed within an angular range connecting the optical axis of the lens outside the non-thermal crimping portion and both ends of the non-thermal crimping portion in FIG. However, it is effective if at least one of the sleeve portion 21 and the rotation stopper 22 is arranged. In the present embodiment, a plurality of crimping claws 20d and non-thermal crimping portions 20e to 20f are provided, and the non-thermal crimping portions are provided between two adjacent crimping nails in the circumferential direction of the lens. However, the present invention is not limited to this. That is, it is sufficient that the number of crimping nails and at least one non-thermal crimping portion are provided, and the non-thermal crimping portion may be adjacent to the crimping nails.

  In a plane perpendicular to the optical axis, when the resin portion 20c is provided over the entire circumference of the lens as in the prior art, the optical axis O and the anti-rotation portion 22 are connected on a straight line connecting the optical axis O and the sleeve portion 21. The resin part 20c on the straight line is caulked. In this case, means for preventing heat from the resin portion from reaching the sleeve portion 21 and the rotation preventing portion 22 in a short time may be provided. For example, between the resin portion 20c on the straight line connecting the optical axis O and the sleeve portion 21 or on the straight line connecting the optical axis O and the anti-rotation portion 22 and the sleeve portion 21 or the anti-rotation portion 22 (“flange portion in the second embodiment”). May be provided with a through hole. Alternatively, the through hole may be filled with a material having a lower thermal conductivity than the surrounding flange portion.

  FIG. 8 is a front view of the caulking claw of Example 2, and shows a plane perpendicular to the optical axis of the second lens unit L2. FIG. 8 differs from FIG. 7 in the range of the non-thermal caulking portion and the phase of the rotation stop portion, and is otherwise the same as in the first embodiment.

  The first moving member 2 includes a main body portion 201, a sleeve portion 2011, a flange portion 2013 that connects the sleeve portion 2011 and the main body portion 201, a rotation prevention portion 2012, and a flange portion 2014 that connects the rotation prevention portion 2012 and the main body portion 201. Have The main body 201 holds the second lens unit L2 in the center and has a substantially hollow cylindrical shape. The sleeve portion 2011 corresponds to the sleeve portion 21, and the anti-rotation portion 2012 corresponds to the anti-rotation portion 22 and functions as the above-described engagement portion.

  Reference numeral 201d denotes crimping claws (pressing portions), which are provided at two positions symmetrically (at equal intervals) around the optical axis of the second lens unit L2. Reference numerals 201e and 201f denote non-thermal caulking portions, and similarly to the non-thermal caulking portion of the first embodiment, a sleeve portion 2011 and an anti-rotation portion 2012 are provided in the respective ranges.

  The flange portion 2013 is a connection portion that protrudes outward from the main body portion 201 and is connected to the sleeve portion 2011, and the flange portion 2014 is a connection portion that protrudes outward from the main body portion 201 and is connected to the rotation prevention portion 2012.

  In FIG. 8, the flange portion 2013 is disposed within an angle range (within the non-thermal caulking portion 201 g) connecting both ends of the non-thermal caulking portion 201 e outside the non-thermal caulking portion 201 e and the optical axis O. In FIG. 8, the flange portion 2014 is disposed within an angle range (within the non-thermal caulking portion 201h) connecting both ends of the non-thermal caulking portion 201f outside the non-thermal caulking portion 201f and the optical axis O.

  In the first embodiment, the sleeve portion 21 and the anti-rotation portion 22 are provided in the range of the non-thermal caulking portions 20e and 20g, but the flange portions 26 and 27 shown by hatching in FIG. Therefore, there is a possibility that heat is transmitted from there to the sleeve portion 21 and the rotation preventing portion 22. Therefore, in the present embodiment, the flange portions 2013 and 2014 are also provided within the range of the non-thermal crimping portions 201e and 201f to reduce the influence of heat during thermal crimping.

  Also in the second embodiment, the angle θ connecting the central axis of the guide bars 101 and 102 and the optical axis O may be set to 100 degrees to 140 degrees, preferably 110 degrees to 130 degrees.

  FIG. 9A is a cross-sectional view showing a lens moving mechanism that moves the lens 600 in the optical axis direction by cam driving. The lens 600 can be applied to the lens shown in FIG. The lens 600 is held by a lens holding frame (lens holding member) 601 by heat caulking. Reference numeral 602 denotes a cam ring having a cam groove 602 with which a roller 604 fixed to a roller holding portion 601a of the lens holding frame 601 is engaged. The roller 604 is an engaging portion provided integrally or separately with the lens holding frame 601. When the cam ring 602 rotates, the lens holding frame 601 moves along with the lens 600 in the optical axis direction. Reference numeral 603 denotes a guide cylinder (guide portion), which engages a linearly-groove 603a extending in the optical axis direction and a roller 604 to guide the lens holding frame 601 so as to be linearly movable. In addition, the roller holding portion 601a, the cam groove 602, the rectilinear groove 603a, and the roller 604 are provided at three locations approximately equally at 120 degrees.

  Here, when at least one portion of the roller holding portion 601a is deformed, the position where the cam groove 602, the rectilinear groove 603a and the roller 604 engage with each other changes, leading to the lens 600 falling or decentering, which deteriorates the optical performance. There is a fear.

  FIG. 9B is a front view of the lens holding frame 601. The lens holding frame 601 is provided with a crimping claw 601c that holds the lens 600 and is formed by thermal crimping. A non-heat caulking portion 601d is adjacent to the caulking claw 601c, and a roller holding portion 601a is provided within the range of the non-heat caulking portion 601d. For this reason, since the heat transfer distance between the crimping claw 601c and the roller holding portion 601a becomes long, heat is hardly transmitted to the roller holding portion 601a, deformation of the roller holding portion 601a is suppressed, and the optical performance of the lens 600 is maintained. be able to.

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

  The optical apparatus of the present invention can be applied to a lens-integrated camera, an interchangeable lens that can be attached to and detached from the camera body, a liquid crystal projector (projection display device), binoculars, a microscope, and the like.

L2 ... 2nd lens group, 2 ... 1st moving member (lens holding member), 21 ... Sleeve part (guide part), 22 ... Non-rotating part (guide part), 20d ... Caulking claw (pressing part), 20e, 20g ... Non-heat caulking part

Claims (7)

A lens,
A lens holding member for holding the lens;
A guide portion for guiding movement of the lens holding member in the optical axis direction of the lens;
An engaging portion provided on the lens holding member and engaged with the guide portion;
Have
The lens holding member is
A fixing unit for fixing the front Symbol lenses by thermal caulking the application of heat and pressure,
A non-thermal crimping part that is adjacent to the fixed part in the circumferential direction of the lens and that is not thermally crimped;
With
Each of the guide portions includes a first guide bar and a second guide bar extending in the optical axis direction,
The engaging portion includes a first engaging portion that engages with the first guide bar, and a second engaging portion that engages with the second guide bar,
The overall total and the second engagement portion of the first engagement portion is an optical axis perpendicular to the plane of the lens, the both ends of the non-thermal caulking portion in the circumferential direction with the optical axis of the lens An optical apparatus characterized in that the optical apparatus is disposed within an angle range to be connected. The lens holding member is
A main body for holding the lens;
In the plan, a first connecting portion connected to the first engaging portion protrudes outwardly in the angular range connecting the both ends of the optical axis non-thermal caulking portion from the main portion of the lens,
A second connecting portion extending outward from the main body portion and connected to the second engaging portion within an angular range connecting the optical axis of the lens and the both ends of the non-thermal caulking portion in the plane;
The optical apparatus according to claim 1, further comprising: The lens holding member further includes a main body for holding the lens ,
The first engaging portion is a sleeve portion having a hollow cylindrical shape that engages with the first guide bar , and the second engaging portion engages with the second guide bar, the optical apparatus according to claim 1 or 2, characterized in that suppresses rotation preventing portion of rotation in the plane of the body portion. 4. The angle between the center of the first guide bar and the center of the second guide bar and the optical axis in the plane is 100 degrees to 140 degrees. 5. The optical apparatus according to item 1. The optical apparatus according to claim 1, wherein the fixing portion is a resin portion. The lens constitutes a photographing optical system that forms an optical image of a subject,
The optical apparatus according to claim 1, further comprising an image sensor that photoelectrically converts the optical image formed by the photographing optical system. The lens constitutes a photographing optical system that forms an optical image of a subject,
The optical system according to claim 1, wherein the lens barrel is detachable from an image pickup apparatus main body having an image pickup device that photoelectrically converts the optical image formed by the photographing optical system. machine.