WO2013105515A1

WO2013105515A1 - Lens barrel

Info

Publication number: WO2013105515A1
Application number: PCT/JP2013/000108
Authority: WO
Inventors: 哲也外村
Original assignee: パナソニック株式会社
Priority date: 2012-01-13
Filing date: 2013-01-11
Publication date: 2013-07-18

Abstract

A lens barrel (100) is provided with: a third lens frame (3), which has eighth and ninth lenses (L8, L9), and which can be relatively displaced within a substantially perpendicular plane in the optical axis direction; and a lens barrel main body (200), which has a first pin (241) that regulates the relative displacement of the third lens frame (3), said relative displacement being within the substantially perpendicular plane. The lens barrel main body (200) has a first supporting section (213), which supports the first pin (241). A cut portion (217) is provided at the periphery of the first supporting section (213).

Description

Lens barrel

The technique disclosed herein relates to a lens barrel that includes a first member and a second member that are relatively movable.

Conventionally, a lens barrel has various moving bodies such as a lens frame. Among such moving bodies, there is one in which a moving range is restricted by contacting another member. For example, the lens barrel of Patent Document 1 has a lens frame that holds a blur correction lens. The lens frame is supported by the fixed frame so as to be movable in a plane orthogonal to the optical axis. In addition, the movement range within the surface of the lens frame is restricted by engaging an engaging portion provided on the lens frame and an engaging portion provided on the fixed frame.

JP 2009-128377 A

In the lens barrel as described above, when the lens frame is freely movable, such as when the power is turned off, the engaging portion of the lens frame and the engaging portion of the fixed frame are engaged with each other. The movement of the lens frame is restricted. Or, even when the movement of the lens frame is controlled, when the origin of the lens frame is adjusted, the engaging portion of the lens frame is engaged with the engaging portion of the fixed frame. Movement may be restricted.

Thus, when the engaging portion of the lens frame is engaged with the engaging portion of the fixed frame, a collision noise may be generated. This collision sound may make the user feel uncomfortable.

The technology disclosed herein has been made in view of such a point, and an object thereof is to reduce a collision sound when restricting movement of a relatively moving member.

The lens barrel disclosed herein has a lens, and restricts relative movement of the first member within the substantially vertical plane and the first member that can move relatively within the substantially vertical plane of the optical axis direction. A second member having a restricting portion, and the second member has a support portion that supports the restricting portion, and the periphery of the support portion has a notch portion or is more rigid than the support portion. It is assumed that a low part is provided.

According to the lens barrel, it is possible to reduce a collision sound when the first member and the restricting portion come into contact with each other.

It is a disassembled perspective view of a lens barrel. It is a front view of a lens barrel. FIG. 3 is a cross-sectional view of the lens barrel taken along line III-III in FIG. It is a perspective view of a lens barrel main body in a state where a third lens frame is supported. It is a perspective view of a lens-barrel main body. It is a rear view of a lens-barrel main body. It is a perspective view of a 3rd lens frame. It is a front view of the 3rd lens frame of the state which installed the 3rd lens group, the flexible printed circuit board, the coil, and the Hall element. It is a perspective view of the 3rd lens frame of the state which installed the 3rd lens group, the flexible printed circuit board, the coil, and the Hall element. It is a perspective view of a flexible printed circuit board. It is the lens barrel which concerns on a modification, Comprising: It is a front view of the state which removed the 1st and 2nd lens frame. FIG. 12 is a cross-sectional view of the lens barrel taken along line XII-XII in FIG. 11. It is a perspective view of the 4th lens frame concerning a modification. It is a perspective view of the lens-barrel main body which concerns on a modification. It is a perspective view of the master flange which concerns on a modification.

Hereinafter, exemplary embodiments will be described in detail with reference to the drawings.

The lens barrel 100 according to the embodiment is a lens barrel provided in a video camera (camera body), and is used to form a subject image on an image sensor.

[1. overall structure]
FIG. 1 is an exploded perspective view of a lens barrel. The lens barrel 100 includes first to fifth lens groups G1 to G5 (the fifth lens group G5 is shown only in FIG. 3) disposed on the optical axis Z, and the first to fourth lens groups G1 to G1. First to fourth lens frames 1 to 4 holding G4, a cylindrical barrel body 200 extending in the optical axis direction, a master flange 300 attached to the camera body side of the barrel body 200, and an imaging unit 400 It has. In this specification, for convenience of explanation, of the X, Y, and Z axes that are orthogonal to each other, the Z axis is the optical axis. The subject side in the optical axis direction may be referred to as the front side, and the camera body side may be referred to as the rear side. Further, the X-axis direction may be referred to as the up-down direction, and the Y-axis direction may be referred to as the left-right direction. Regarding the left-right direction, the right side when facing forward is referred to as “right”, and the left side is referred to as “left”.

The lens barrel body 200 is a square tube extending in the optical axis direction. The cross section of the barrel main body 200 is substantially rectangular, and the longitudinal direction coincides with the X-axis direction, and the short side direction coincides with the Y-axis direction. As will be described in detail later, a rear wall 210 provided with an opening 211 through which the optical axis Z passes is provided on the rear side in the optical axis direction of the barrel main body 200. The lens barrel body 200 is an example of a first member.

The master flange 300 is a square tube extending in the optical axis direction, similar to the lens barrel body 200. As will be described in detail later, a rear wall 310 provided with an opening 311 through which the optical axis Z passes is provided on the rear side of the master flange 300 in the optical axis direction.

The imaging unit 400 includes an imaging element 410, a substrate 420 to which the imaging element 410 is attached, and an attachment plate 430 for attaching the imaging unit 400 to the master flange 300. The image sensor 410 is a MOS sensor, and converts the light incident on the imaging surface into an electrical signal and outputs the electrical signal. A substrate 420 is attached to the rear surface of the image sensor 410. Further, a mounting plate 430 is attached to the rear surface of the substrate 420. The imaging unit 400 is attached to the master flange 300 from the rear with the imaging element 410 facing forward.

FIG. 2 is a front view of the lens barrel, and FIG. 3 is a cross-sectional view of the lens barrel taken along line III-III in FIG.

The first lens group G1 to the fifth lens group G5 constitute an imaging optical system O that forms an image of light from the subject on the imaging element 410. The imaging optical system O is an example of an optical system. As shown in FIG. 3, the first lens group G1 includes first to fourth lenses L1 to L4. The second lens group G2 includes fifth to seventh lenses L5 to L7. The third lens group G3 includes eighth and ninth lenses L8 and L9. The fourth lens group G4 includes tenth and eleventh lenses L10 and L11. The fifth lens group G5 includes a twelfth lens L12. The second lens group G2 functions as a zoom lens. The third lens group G3 functions as an image blur correction lens. The fourth lens group G4 functions as a focus lens.

The first lens group G1 is held by the first lens frame 1. As shown in FIG. 1, the first lens frame 1 includes a cylindrical main body 11 and a flange 12 that protrudes outward from the main body 11 at the rear end of the main body 11. The main body 11 holds the first lens group G1. The first lens frame 1 is attached to the front end of the barrel main body 200 via the flange 12.

The second lens group G2 is held by the second lens frame 2. As shown in FIG. 1, the second lens frame 2 is a substantially square flat plate member having an opening at the center. The second lens frame 2 holds the second lens group G2 at the opening. The second lens frame 2 is supported in the lens barrel body 200 so as to be movable in the optical axis direction, and is driven in the optical axis direction by a first stepping motor (not shown).

Specifically, two

guide poles

221 and 221 extending in the optical axis direction are provided in the barrel main body 200. In the lens barrel body 200, one guide pole 221 is disposed at the lower right corner, and the other guide pole 221 is disposed at the upper left corner. Each guide pole 221 has a front end supported by the first lens frame 1 and a rear end supported by the master flange 300. On the other hand, a notch 23 is formed in the upper left corner of the second lens frame 2. An upper left guide pole 221 fits into the notch 23. A boss 22 is provided at the lower right corner of the second lens frame 2 as shown in FIG. The boss portion 22 is provided so as to extend rearward. A through hole extending in the front-rear direction is formed in the boss portion 22. A lower right guide pole 221 is inserted into the through hole of the boss portion 22. The boss portion 22 functions as a bearing, and the second lens frame 2 is guided in the optical axis direction by a lower right guide pole 221. Further, the notch 23 functions as a detent and restricts the rotation of the second lens frame 2 around the lower right guide pole 221.

Further, a first stepping motor is disposed in the barrel main body 200. On the other hand, the second lens frame 2 is provided with a rack. In a state where the second lens frame 2 is supported by the

guide poles

221 and 221, the rack meshes with the lead screw of the first stepping motor. Thus, the second lens frame 2 is driven by the first stepping motor and moves in the optical axis direction.

The third lens group G3 is held by the third lens frame 3. As shown in FIG. 1, the third lens frame 3 is a frame-like member, and holds the third lens group G3. The third lens frame 3 is supported on the rear wall 210 of the barrel main body 200 so as to be movable within a plane orthogonal to the optical axis Z (that is, the XY plane). The detailed configuration of the third lens frame 3 will be described later. The third lens group G3 is an example of an optical element, and the third lens frame 3 is an example of a second member or a frame.

The fourth lens group G4 is held by the fourth lens frame 4. As shown in FIG. 1, the fourth lens frame 4 is a substantially square flat plate member having an opening at the center. The fourth lens frame 4 holds the fourth lens group G4 in the central opening. The fourth lens frame 4 is supported in the master flange 300 so as to be movable in the optical axis direction, and is driven in the optical axis direction by a second stepping motor (not shown).

Specifically, in the master flange 300, two

guide poles

321 and 321 extending in the optical axis direction are provided. In the master flange 300, one guide pole 321 is disposed in the lower left corner, and the other guide pole 321 is disposed in the upper right corner. Each guide pole 321 has a front end supported by the barrel main body 200 and a rear end supported by the master flange 300. On the other hand, the fourth lens frame 4 includes a plate-shaped main body 40, a boss 41 that functions as a bearing, and a notch 42 that functions as a rotation stopper. The boss 41 is provided at the lower left corner of the main body 40 so as to extend in the front-rear direction. A through hole extending in the front-rear direction is formed in the boss portion 41. The lower left guide pole 321 is inserted into the through hole of the boss portion 41. The fourth lens frame 4 is guided in the optical axis direction by a lower left guide pole 321. Further, the notch 42 is provided at the upper right corner of the main body 40 so as to open outward. An upper right guide pole 321 is fitted into the notch 42. The notch 42 restricts the rotation of the fourth lens frame 4 around the lower left guide pole 321.

In the master flange 300, a second stepping motor 322 is disposed. On the other hand, the fourth lens frame 4 is provided with a rack 43. In a state where the fourth lens frame 4 is supported by the

guide poles

321 and 321, the rack 43 is engaged with the lead screw of the second stepping motor 322. Thus, the fourth lens frame 4 is driven by the second stepping motor 322 and moves in the optical axis direction.

The fifth lens group G5 is held by the master flange 300. Specifically, as shown in FIG. 3, the fifth lens group G5 is attached to the opening 311 of the rear wall 310 from the front side. An IR cut filter 312 is attached to the opening 311 of the rear wall 310 from the rear side. Note that the imaging element 410 of the imaging unit 400 is located on the optical axis Z and behind the IR cut filter 312.

[2. Detailed structure of the third lens frame]
Next, the detailed structure of the third lens frame 3 will be described in detail.

FIG. 4 is a perspective view of the lens barrel body 200 in a state where the third lens frame 3 is supported.

The third lens group G3 and the third lens frame 3 constitute a part of an image blur correction apparatus 500 for correcting image blur. In addition to the third lens group G3 and the third lens frame 3, the image blur correction device 500 includes a third actuator 510 that outputs driving force in the X-axis direction and a fourth actuator 520 that outputs driving force in the Y-axis direction. And have. Each of the third and

fourth actuators

510 and 520 is an electromagnetic actuator, and includes a magnet and a yoke provided on the barrel main body 200 and a coil provided on the third lens frame 3.

The third lens frame 3 is supported by the rear wall 210 of the barrel main body 200 as described above. As will be described in detail later, the third lens frame 3 is engaged with first and

second poles

231 and 232 provided on the rear wall 210, whereby a plane orthogonal to the optical axis Z (that is, XY). Is supported so as to be movable within a plane. Further, the third lens frame 3 is engaged with first and

second pins

241 and 242 provided on the rear wall 210, so that the movement in a plane orthogonal to the optical axis Z is within a predetermined range. Is limited to.

[2-1. Configuration of the rear wall of the lens barrel body]
FIG. 5 is a rear perspective view of the barrel main body 200 and FIG. 6 is a rear view of the barrel main body 200.

As shown in FIGS. 5 and 6, the rear wall 210 of the lens barrel main body 200 has an opening 211 through which the optical axis Z passes in the center, and a third wall for restricting the movement of the third lens frame 3. First and

second poles

231 and 232 and first and

second pins

241 and 242 are provided.

Specifically, the first pole 231 is disposed below the opening 211. Both ends of the first pole 231 are supported by the rear wall 210 while extending in the left-right direction. The second pole 232 is disposed above the opening 211. The second pole 232 extends in the left-right direction, and an intermediate portion is supported by the rear wall 210. The first pin 241 is disposed to the left of the optical axis Z. One end of the first pin 241 is supported by the rear wall 210 in a state of extending in the optical axis direction. Specifically, the rear wall 210 includes a plate-like main body portion 212 having an opening 211 and a first support portion 213 that supports the first pin 241. A notch 217 is formed around the first support portion 213. The 1st support part 213 is divided by the notch part 217, and is formed in the substantially L shape by planar view. The first support part 213 has a main body part 213a defined by the notch part 217, and a rib 213b provided along the periphery of the main body part 213a. The first support portion 213 is supported by the main body portion 212 in a cantilever manner. The distal end portion of the first support portion 213 is located to the left of the optical axis Z in the opening 211. A first pin 241 is supported at the tip of the first support portion 213. The first support part 213 is partially connected to the main body part 212 via the connection part 214. The second pin 242 is disposed above the opening 211. One end of the second pin 242 is supported by the rear wall 210 while extending in the optical axis direction.

It should be noted that a space for arranging the magnet and yoke of the third actuator 510 is provided on the relatively right side between the second pin 242 and the opening 211. In addition, a space for arranging the magnet and yoke of the fourth actuator 520 is provided below the opening 211. As shown in FIG. 4, the yoke 513 of the third actuator 510 has a shape in which two opposing plates are connected at one end. The magnet 512 of the third actuator 510 is attached to a plate on one side inside the yoke 513. Although not shown, the yoke of the fourth actuator 520 is composed of a single plate and overlapped with the magnet 522.

[2-2. Configuration of third lens frame]
FIG. 7 is a perspective view of the third lens frame 3.

As shown in FIG. 7, the third lens frame 3 includes a plate-shaped main body 31 having an opening 31a formed at the center thereof, a cylindrical portion 32 provided along the outer periphery of the opening 31a, and the first lens frame 3. A first engagement portion 33 that engages with the pole 231; a second engagement portion 34 that engages with the second pole 232; a third engagement portion 35 that engages with the first pin 241; It has the 4th engaging part 36 engaged with 2 pin 242.

The cylindrical portion 32 holds the third lens group G3. That is, the opening 31a of the main body 31 is a region through which light incident on the imaging optical system O passes. The opening 31a is an example of a passing area, and the cylindrical part 32 is an example of a holding part. The first engaging portion 33 is provided at two locations on the rear surface of the main body portion 31 below the optical axis Z and on both the left and right sides. The first engaging portion 33 is formed in a hook shape that protrudes backward from the main body portion 31 and then bends downward. The second engagement portion 34 is provided on the front surface 31 d of the main body portion 31 above the optical axis Z and on the relatively left side. The second engaging portion 34 is formed in a bowl shape that protrudes forward from the main body portion 31 and then bends upward. The third engagement portion 35 is provided to project leftward from the substantially vertical center of the left end edge of the main body portion 31. The third engaging portion 35 is formed in an annular shape, and a substantially parallelogram opening is formed therein. The fourth engaging portion 36 is provided so as to protrude upward from the upper end edge of the main body portion 31. The fourth engagement portion 36 is formed in a bifurcated shape.

Also, on the front surface 31d of the main body 31, first and

second arrangement spaces

31b and 31c for arranging coils and the like to be described later are formed. The first arrangement space 31b is located above the opening 31a. The second arrangement space 31c is located below the opening 31a.

In addition, on the front surface 31d of the main body 31, positioning pins 37 for positioning a flexible printed circuit board 600, which will be described later, are provided at three locations in the vicinity of the first and

second arrangement spaces

31b and 31c and the third engagement portion 35. Is provided.

8 is a front view of the third lens frame 3 in a state where the third lens group G3, the flexible printed circuit board 600, the

coils

511 and 521, and the

Hall elements

530 and 540 are installed, and FIG. 9 is a perspective view thereof. FIG. 10 is a perspective view of the flexible printed circuit board 600.

In the first arrangement space 31b of the third lens frame 3, a hall element 530 that detects the amount of movement of the coil 511 of the third actuator 510 and the third lens frame 3 in the Y-axis direction is arranged. The coil 511 is disposed above the opening 31a and offset to the right side of the optical axis Z. The hall element 530 is disposed above the opening 31a and at a position almost directly above the optical axis Z. The coil 511 and the hall element 530 are arranged in the Y-axis direction.

In the second arrangement space 31 c of the third lens frame 3, a coil 521 of the fourth actuator 520 and a Hall element 540 that detects the amount of movement of the third lens frame 3 in the X-axis direction are arranged. The coil 521 is disposed below the opening 31a and substantially directly below the optical axis Z. The hall element 540 is disposed below the opening 31 a and between the opening 31 a and the coil 521. The coil 521 and the hall element 540 are arranged in the X-axis direction.

The

coils

511 and 521 and the

Hall elements

530 and 540 are electrically and physically connected to one flexible printed board 600. Power supply to the

coils

511 and 521 and output of detection signals from the

Hall elements

530 and 540 are performed via the flexible printed circuit board 600. The coil 511 or the Hall element 530 is an example of a first electronic component, and the coil 521 or the Hall element 540 is an example of a second electronic component. A positioning hole 650 that engages with the positioning pin 37 of the third lens frame 3 is formed in the flexible printed circuit board 600. The flexible printed circuit board 600 is positioned on the third lens frame 3 by engaging the positioning pins 37 with the positioning holes 650.

[2-3. Support structure and drive of third lens frame]
The third lens frame 3 configured as described above is attached to the rear wall 210 by engaging each engaging portion with each shaft of the rear wall 210. Specifically, as shown in FIG. 4, the first engagement portion 33 is engaged with the first pole 231 and the second engagement portion 34 is engaged with the second pole 232. As a result, the third lens frame 3 is movable in the XY plane while being restricted from moving in the optical axis direction. Further, the third engaging portion 35 is engaged with the first pin 241 and the fourth engaging portion 36 is engaged with the second pin 242. As a result, the movement of the third lens frame 3 in the XY plane is limited within a predetermined range. Specifically, the third lens frame 3 can be rotated about the second pin 242 and can be translated in the direction in which the fourth engagement portion 36 extends. However, since the first pin 241 is engaged with the third engagement portion 35, the first pin 241 can move within the third engagement portion 35 in the rotational movement and translational movement of the third lens frame 3. Limited to range.

At this time, the coil 511 enters the inside of the yoke 513 of the third actuator 510 provided on the rear wall 210 and faces the magnet 512. Further, the coil 521 is opposed to the magnet 522 of the fourth actuator 520 provided on the rear wall 210.

The third lens frame 3 supported in this way is driven by the third and

fourth actuators

510 and 520. Specifically, the third lens frame 3 is moved in the direction in which the fourth engagement portion 36 extends, that is, in the X-axis direction in general, by the driving force of the third actuator 510. The amount of movement in the X-axis direction is detected by the Hall element 530. The third lens frame 3 is moved in the circumferential direction around the second pin 242 by the driving force of the fourth actuator 520. The second pin 242 and the fourth actuator 520 are disposed at positions facing each other across the optical axis Z, and the rotational movement amount by the fourth actuator 520 is the distance between the second pin 242 and the optical axis of the third lens group G3. Therefore, the movement in the circumferential direction can be regarded as movement in the Y-axis direction. The amount of movement in the Y-axis direction is detected by the Hall element 540.

The shape of the inner peripheral edge of the opening of the third engagement portion 35 is a substantially parallelogram so that the center of the third lens group G3 can move within a substantially square area centered on the optical axis Z. Further, the movement range of the third lens frame 3 is limited.

Further, the origin of the third lens frame 3 is adjusted by bringing the third engagement portion 35 into contact with the first pin 241. Specifically, the third lens frame 3 is moved only upward while fixing the position in the left-right direction, and the third engagement portion 35 and the first pin 241 are brought into contact with each other. Further, the third lens frame 3 is moved only downward while fixing the position in the left-right direction, and the third engaging portion 35 and the first pin 241 are brought into contact with each other. Similarly, the third lens frame 3 is moved only to the left while fixing the position in the vertical direction, and the third engagement portion 35 and the first pin 241 are brought into contact with each other. Further, the third lens frame 3 is moved only to the right while fixing the position in the vertical direction, and the third engagement portion 35 and the first pin 241 are brought into contact with each other. In this way, the origin is adjusted by detecting the position of the third lens frame 3 where the third engaging portion 35 and the first pin 241 abut in the vertical and horizontal directions.

[3. First pin support structure]
Here, the support structure of the first pin 241 will be described in detail. As shown in FIGS. 5 and 6, the rear wall 210 includes a plate-like main body portion 212 having an opening 211 and a first support portion 213 that supports the first pin 241. The rear wall 210 is made of resin. The first pin 241 is made of metal.

The first support part 213 extends from the main body part 212 into the opening part 211 at the upper part of the opening part 211. Specifically, the first support portion 213 extends along the inner peripheral edge of the main body portion 212 in the opening portion 211. Thus, the first support portion 213 is supported by the main body portion 212 in a cantilever manner. The distal end portion of the first support portion 213 is located to the left of the optical axis Z in the opening 211. A first pin 241 is supported at the tip of the first support portion 213. The first support part 213 is partially connected to the main body part 212 via the connection part 214. The connection part 214 is a member that is thinner and less rigid than the first support part 213. The 1st support part 213 is an example of a support part, and the 1st pin 241 is an example of a control part.

The first support portion 213 configured as described above has lower rigidity than the main body portion 212. Specifically, the first support portion 213 has lower rigidity than at least a portion of the main body portion 212 around the first support portion 213, that is, a portion to which the first support portion 213 is connected. In addition, a notch 217 is formed between the main body 212 and the first support 213.

Thereby, it is possible to reduce a collision sound between the third engagement portion 35 of the third lens frame 3 and the first pin 241 of the rear wall 210. That is, in the present embodiment, when the power of the lens barrel 100 is turned off, the driving force of the third and

fourth actuators

510 and 520 becomes zero, so that the third lens frame 3 is movable in the XY plane. It becomes. At that time, the movement of the third lens frame 3 in the XY plane is restricted by the third engagement portion 35 and the first pin 241 coming into contact with each other. Here, when the third engaging portion 35 and the first pin 241 come into contact with each other, a collision sound is generated. Further, the lens barrel 100 of the present embodiment performs the origin adjustment by engaging the third engaging portion 35 with the first pin 241. Also at that time, the third engaging portion 35 and the first pin 241 come into contact with each other, so that a collision sound is generated. On the other hand, a collision sound is reduced by comprising the 1st support part 213 as mentioned above. One factor is considered to be that the engaging portion of the rear wall 210 is configured to have a lower rigidity than the main body portion 212 of the rear wall 210, so that the impact is absorbed by elastic deformation. Here, although the first support part 213 is connected to the main body part 212 by the connection part 214, the first support part 213 is more rigid than the configuration in which the first pin 241 is directly provided on the main body part 212. Is low. Another factor is considered to be because the notch 217 is provided between the main body 212 and the first support 213. Thereby, it is considered that the impact is easily dispersed and the collision sound is reduced.

[4. Detailed structure of flexible printed circuit board]
[4-1. Configuration of flexible printed circuit board]
The flexible printed circuit board 600 includes a first connection part 610 to which the coil 511 and the hall element 530 are electrically connected, a second connection part 620 to which the coil 521 and the hall element 540 are electrically connected, and a first connection part. It has the connection part 630 which connects 610 and the 2nd connection part 620, and the extraction | drawer part 640 pulled out from the edge part by the side of the 1st connection part 610 of the connection part 630. As shown in FIG.

The first connection portion 610 and the second connection portion 620 have the normal direction (thickness direction) facing the same direction. The coil 511 and the hall element 530 are not only electrically connected but also physically connected to the first connection portion 610, and the coil 511 and the hall element 530 are integrally formed. The coil 521 and the hall element 540 are connected not only electrically but physically to the second connection portion 620, and the coil 521 and the hall element 540 are integrally formed.

The connecting portion 630 includes first and

second lodging portions

630a and 630c provided at both ends, and an upright portion 630b provided between the first and

second lodging portions

630a and 630c. The first lodging part 630 a is connected to the first connection part 610, and the normal direction faces the same direction as the first connection part 610. The second lodging part 630 c is connected to the second connection part 620, and the normal direction is directed to the same direction as the second connection part 620. The first and

second lodging parts

630a and 630b are provided with reinforcing plates 630d (only those provided on the first lodging part 630a are shown in FIG. 10). The standing portion 630b is bent with respect to the first lodging portion 630a and rises. The standing portion 630b is also bent and rises with respect to the second lodging portion 630c. The upright part 630b extends between the first and second

fallen parts

630a and 630c while curving with one surface inward and the other face outward. Here, the “rise state” is not limited to the case where it stands up perpendicularly to the plane perpendicular to the optical axis, and is not parallel to the plane perpendicular to the optical axis but between the plane perpendicular to the optical axis. Means a state having an angle.

The drawer part 640 is connected to the standing part 630b of the connecting part 630, and extends in a standing state in the same manner as the standing part 630b.

Further, a positioning hole 650 that engages with the positioning pin 37 of the third lens frame 3 is formed in the flexible printed circuit board 600. Specifically, the positioning hole 650 is provided in the first connection part 610, the first fallen part 630a of the standing part 630b, and the second connection part 620.

As described above, the flexible printed circuit board 600 extends between the coil 511 and the coil 521 in a state where it rises with respect to the front surface 31d, and then bends from the raised state and becomes substantially parallel to the front surface 31d. The coil 521 is connected.

[4-2. Arrangement of flexible printed circuit board]
As shown in FIGS. 8 and 9, the flexible printed circuit board 600 configured as described above is disposed on the surface (one surface in the optical axis direction, specifically, the front surface) 31d of the third lens frame 3. Is done. The flexible printed circuit board 600 is positioned on the third lens frame 3 by engaging the positioning pins 37 in the positioning holes 650. The first connection portion 610 is in a state of being laid down on the arrangement space 31b (in other words, in a state of being laid or opposed), that is, such that the normal direction thereof coincides with the normal direction of the arrangement space 31b. Are disposed on the main body 31. The second connecting portion 620 is also in a state of being laid down on the arrangement space 31c (in other words, in a state of being laid or opposed), that is, its normal direction (thickness direction) is the normal direction of the arrangement space 31c. They are arranged on the main body 31 so as to coincide with each other.

On the other hand, the connecting portion 630 is disposed in a state of being bent in the optical axis direction with respect to the front surface 31 d of the main body portion 31. Specifically, the upright part 630b is in a state of rising with respect to the front surface 31d of the main body part 31, that is, with respect to the surface orthogonal to the optical axis Z. The standing portion 630 b extends outside the opening portion 31 a in a standing state, more specifically, along the cylindrical portion 32. That is, the upright portion 630b is bent at the joint with the second lodging portion 630c and rises in the optical axis direction, and then extends in the circumferential direction around the optical axis Z instead of extending in the optical axis direction as it is. . As a result, the upright portion 630b passes between the third engaging portion 35 and the cylindrical portion 32 in a standing state. Here, “along the cylindrical portion 32” does not need to be strictly parallel to the cylindrical portion 32, and means a state extending along the shape of the cylindrical portion 32. The drawing portion 640 is extended outward from the third lens frame 3 from the end portion of the standing portion 630b on the first connection portion 610 side in a standing state.

[5. effect]
According to the present embodiment, the lens barrel 100 includes the eighth lens and the ninth lens L8, L9, the third lens frame 3 that is relatively movable in a substantially vertical plane in the optical axis direction, and the third lens. A lens barrel body 200 having a first pin 241 for restricting relative movement of the frame 3 in the substantially vertical plane, and the lens barrel body 200 has a first support portion 213 for supporting the first pin 241. A notch 217 is provided around the first support portion 213.

According to the above configuration, it is possible to reduce the collision sound when the first pin 241 and the third lens frame 3 are engaged.

The third lens frame 3 is configured to be movable relative to the lens barrel body 200 in a plane orthogonal to the optical axis Z of the imaging optical system O. In this configuration, it is particularly effective to reduce the collision sound. In other words, the lens barrel 100 is often in a state in which the optical axis Z extends in the horizontal direction during photographing or when the camera body is placed. In this state, the direction of gravity and the plane orthogonal to the optical axis Z are substantially parallel. Therefore, when the third lens frame 3 is not driven, the third lens frame 3 moves under the influence of gravity. easy. That is, the first pin 241 and the third lens frame 3 are likely to collide. However, when the first support portion 213 is configured as described above, it is possible to reduce a collision sound when the first pin 241 and the third lens frame 3 are engaged.

Further, a notch 217 is provided around the first support part 213, and the first support part 213 is partitioned by the notch part 217 and formed in a substantially L shape.

According to this configuration, even when the third lens frame 3 collides with the first pin 241 from various directions, the collision sound can be reduced. For example, in FIG. 6, the collision noise can be reduced whether the third lens frame 3 collides with the first pin 241 from the X-axis direction or the Y-axis direction.

In addition, a notch 217 is provided around the first support part 213. The first support part 213 includes a main body part 213a defined by the notch part 217 and a peripheral edge of the main body part 213a. And a rib 213b provided.

According to this configuration, the strength of the first support portion 213 can be improved by the rib 213b. If the rigidity of the first support portion 213 is too low, a slip stick phenomenon may occur between the first pin 241 and the third lens frame 3. By improving the strength of the first support portion 213, a slip stick phenomenon between the first pin 241 and the third lens frame 3 can be prevented. Further, in the present embodiment, the origin adjustment is performed by bringing the third lens frame 3 into contact with the first pin 241. By preventing the rigidity of the first support portion 213 from becoming excessively low, the accuracy of the origin adjustment can be improved. In the present embodiment, a part of the first support part 213 is connected to the main body part 212 via the connection part 214. This also can prevent the rigidity of the first support portion 213 from becoming too low.

Further, the first support part 213 and the first pin 241 are formed separately.

Further, according to the present embodiment, the lens barrel 100 has the coil 511 and the coil 521 disposed on one surface of the third lens frame 3 that is substantially orthogonal to the optical axis Z, that is, the front surface 31d. The coil 511 and the coil 521 are connected by a flexible printed circuit board 600, and the flexible printed circuit board 600 extends between the coil 511 and the coil 521 in a state of rising from the front surface 31d. It bends from the standing state and is in a state substantially parallel to the front surface 31d and is connected to the coil 511 and the coil 521.

When connecting a plurality of electronic components arranged in one frame by a connecting portion of one flexible printed circuit board, the connecting portion is laid on the same surface of the frame as the electronic component. The flexible printed circuit board is a tape-like member having flexibility and has a certain width. Therefore, it is necessary to secure a space for disposing the connecting portion in the frame, and the frame is increased in size accordingly.

On the other hand, according to the above configuration, the coil 511 and the coil 521 are disposed on the front surface 31d of the third lens frame 3, so that the flexible printed circuit board 600 is disposed on the front surface 31d of the third lens frame 3. The Since the flexible printed circuit board 600 is a tape-like or sheet-like member, when the flexible printed circuit board 600 is laid on a certain member, the flexible printed circuit board 600 is usually in a state of being laid down on the surface of a certain member, that is, It is laid in a state substantially parallel to the surface of a certain member. However, in the present embodiment, the portion of the flexible printed circuit board 600 that extends between the coil 511 and the coil 521 is raised with respect to the front surface 31d of the third lens frame 3, thereby The arrangement space of the flexible printed circuit board 600 on the front surface 31d of the three lens frame 3 can be reduced. As a result, the third lens frame 3 can be reduced in size.

More specifically, the portion of the flexible printed circuit board 600 that extends between the coil 511 and the coil 521 while standing is extended to the outside of the opening 31a. Therefore, the flexible printed circuit board 600 is more flexible in the periphery of the opening 31a than the configuration in which the flexible printed circuit board 600 is extended to the outside of the opening 31a in a state parallel to the front surface 31d of the third lens frame 3 (that is, in a face down state). The arrangement space of the printed circuit board 600 can be reduced.

Further, a reinforcing plate 630d is provided on the first and second lying down

portions

630a and 630c of the flexible printed board 600 that are substantially parallel to the front surface 31d.

Since the flexible printed circuit board 600 is partially bent and rises, the position of the flexible printed circuit board 600 is difficult to stabilize as compared with a configuration in which the flexible printed circuit board 600 is simply arranged in parallel with the front surface 31d. In particular, the raised part, that is, the standing part 630b is unstable. Here, if the strengths of the first and

second lodging parts

630a and 630b are low, the first and

second lodging parts

630a and 630b also change according to the change of the standing part 630b. On the other hand, by providing the first and

second lodging parts

630a and 630c with the reinforcing plate 630d, the originally stable first and

second lodging parts

630a and 630c can be further stabilized. The standing portion 630b connected to the

second lodging portions

630a and 630c can be stabilized.

Further, the first lying portion 630a of the flexible printed board 600 that is substantially parallel to the front surface 31d is positioned by positioning pins 37 provided on the front surface 31d.

Since the flexible printed circuit board 600 is partially bent and rises, the position of the flexible printed circuit board 600 is difficult to stabilize as compared with a configuration in which the flexible printed circuit board 600 is simply arranged in parallel with the front surface 31d. By positioning the flexible printed circuit board 600 with the positioning pins 37, the flexible printed circuit board 600 can be stably disposed. At this time, since the first overlaid portion 630a positioned by the positioning pin 37 is relatively close to the raised portion of the flexible printed circuit board 600, the flexible printed circuit board 600 can be effectively stabilized.

[6. 4th lens frame movement restriction]
Below, the movement restriction | limiting of the 4th lens frame 4 which concerns on a modification is demonstrated. FIG. 11 shows a front view of the lens barrel 100 according to the modified example with the first and second lens frames 1 and 2 removed, and FIG. 12 shows the lens mirror taken along line XII-XII in FIG. Sectional drawing of a cylinder is shown.

As shown in FIG. 12, the guide pole 321 provided in the lower left corner of the master flange 300 is supported by the rear wall 210 of the lens barrel main body 200 and the rear end of the guide flange 321 is the rear wall of the master flange 300. 310 is supported.

FIG. 13 is a perspective view from the front of the fourth lens frame 4 according to the modification. The fourth lens frame 4 includes a plate-shaped main body 40, a boss 41 that functions as a bearing, and a notch 42 that functions as a rotation stopper. The main body 40 has an opening in the center, and holds the fourth lens group G4 in this opening. The boss 41 is provided at the lower left corner of the main body 40 so as to extend in the front-rear direction. A through hole extending in the front-rear direction is formed in the boss portion 41. The lower left guide pole 321 is inserted into the through hole of the boss portion 41. The fourth lens frame 4 is guided in the optical axis direction by a lower left guide pole 321. Further, the notch 42 is provided at the upper right corner of the main body 40 so as to open outward. An upper right guide pole 321 is fitted into the notch 42. The notch 42 restricts the rotation of the fourth lens frame 4 around the lower left guide pole 321. A coil 44 is provided in the main body 40 below the central opening. Electric power is supplied to the coil 44 via the flexible printed circuit board 44a. Further, the boss portion 41 is provided with a sensor magnet 45.

On the other hand, a magnet 46 is disposed in the master flange 300 at a position close to the coil 44 of the fourth lens frame 4. The magnet 46 is provided with a first yoke 47a at one end portion in the longitudinal direction and a second yoke 47b at the other end portion in the longitudinal direction. The first yoke 47a and the second yoke 47b are connected by a pair of opposing

plates

48a and 48b. The magnet 46 is attached to the plate 48a. The plate 48 b is disposed so as to penetrate the coil 44.

The fourth lens frame 4 configured in this way generates a driving force by supplying power to the coil 44 and moves along the guide pole 321. The movement of the fourth lens frame 4 is detected via the sensor magnet 45. When the power supply to the coil 44 is stopped, the fourth lens frame 4 is brought into an unconstrained state and can move freely along the guide pole 321.

FIG. 14 is a perspective view from the rear of the lens barrel body 200 according to the modification. Specifically, a boss portion 215 is formed on the rear wall 210 of the barrel main body 200 as shown in FIGS. The boss portion 215 is formed with a fitting hole that opens rearward. The front end portion of the guide pole 321 is fitted in the fitting hole of the boss portion 215. A gap 216 is formed around the boss portion 215. The gap 216 is formed above and below the boss portion 215 and penetrates the rear wall 210. Thus, the boss 215 is less rigid than the main body 212 of the rear wall 210.

FIG. 15 is a perspective view from the rear of the master flange 300 according to the modification. Specifically, as shown in FIGS. 12 and 15, the rear wall 310 of the master flange 300 includes a plate-like main body 313 and a boss 314 that protrudes rearward from the main body 313. The boss portion 314 is formed with a fitting hole that opens forward. The rear end portion of the guide pole 321 is fitted in the fitting hole. A groove 315 is formed around the boss 314 in the rear wall 310. The groove 315 is formed on the entire circumference of the boss portion 314. Thus, the periphery of the boss portion 314 is formed thinner than the main body portion 313. Thereby, the boss portion 314 has lower rigidity than the main body portion 313 of the rear wall 310.

The fourth lens frame 4 is restricted from moving forward in the optical axis direction when the front end face 41a of the boss 41 abuts against the rear end face of the boss 215. On the other hand, the fourth lens frame 4 is restricted from moving rearward in the optical axis direction when the rear end surface 41 b of the boss portion 41 abuts against a portion of the rear wall 310 around the boss portion 314.

The fourth lens frame 4 configured in this manner generates a collision sound when the boss portion 41 contacts the boss portion 215 of the rear wall 210 and the boss portion 314 of the rear wall 310. On the other hand, the boss part 215 has a lower rigidity than the main body part 212, and the boss part 314 has a lower rigidity than the main body part 313. Thereby, a collision sound can be reduced.

<< Other Embodiments >>
As described above, the embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated by the said embodiment and it can also be set as new embodiment. In addition, among the components described in the attached drawings and detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to exemplify the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

The above-described embodiment may be configured as follows.

For example, the lens barrel 100 is provided in the video camera, but is not limited thereto. The lens barrel 100 may be used for a digital still camera. The lens barrel 100 may be a conversion lens that is detachably attached to the camera body.

In the above embodiment, the relative movement of the third lens frame 3 with respect to the barrel main body 200 is restricted by the engaging portion, and the relative movement of the fourth lens frame 4 with respect to the barrel main body 200 and the master flange 300 is engaged. However, the present invention is not limited to this. For example, you may employ | adopt the structure of the said embodiment for the structure which controls the movement of moving bodies other than a lens frame.

The notch 217 is provided around the first support part 213, but is not limited thereto. A portion having rigidity lower than that of the first support portion 213 may be provided around the first support portion 213. For example, a gap 216 around the boss portion 215 may be provided around the first support portion 213. Further, the periphery of the first support part 213 may be thinned like the boss part 314. In addition, any configuration can be employed as long as the rigidity can be made lower than that of the first support portion 213.

Further, the first pin 241 may be formed of resin. The first pin 241 and the first support portion 213 may be integrally formed.

In the above embodiment, the notch 217 is formed between the lens barrel body 200 and the third lens frame 3 only in the periphery of the first support portion 213 of the lens barrel body 200. However, the notch 217 may be formed only in the peripheral portion of the third engagement portion 35 of the third lens frame 3 or may be configured to have low rigidity, or the first and second peripheral portions of the third engagement portion 35 may be combined with the first portion. A cutout portion or a low-rigidity portion may be formed on both peripheral portions of the support portion 213.

Further, although the flexible printed circuit board 600 is provided on the moving third lens frame 3, it is not limited to this. In the configuration in which a magnet is provided in the third lens frame 3 and the

coils

511 and 521 are provided in the rear wall 210 of the barrel main body 200, the flexible printed circuit board 600 is provided in the rear wall 210. In that case, the opening 211 of the rear wall 210 corresponds to a passing region through which light incident on the imaging optical system O passes.

Further, the provision of the flexible printed circuit board 600 is not limited to the third lens frame 3. If it is a member in which a plurality of electronic components are arranged, flexible printed circuit board 600 can be arranged in an arbitrary frame.

The flexible printed circuit board 600 is not limited to connecting two electronic components. The flexible printed circuit board 600 may be electrically connected to three or more electronic components and coupled to each other. For example, as in the above-described embodiment, even when four electronic components including two coils and two hall elements are connected, if the coil and the hall element are close to each other, one connecting portion Thus, a pair of coils and Hall elements can be connected to another pair of coils and Hall elements. When connecting three electronic components arranged at positions separated from each other, a connecting portion that connects two electronic components of the three electronic components and a connecting portion that connects two electronic components in another combination May have a part. In such a case, it suffices that at least one of the connecting portions is arranged in a standing state. That is, when the flexible printed circuit board 600 has a plurality of connecting portions, it is only necessary that at least one of the connecting portions is raised. It is not necessary that all the connecting portions are arranged in a standing state.

In the embodiment, the standing portion 630b of the connecting portion 630 extends along the outer peripheral surface of the cylindrical portion 32. However, the rising portion 630b may be in contact with the outer peripheral surface of the cylindrical portion 32. It may be separated.

In the above embodiment, the coil 511 is disposed above the opening 31a and the coil 521 is disposed below the opening 31a. However, the arrangement of the two electronic components is not limited to this. The two electronic components do not necessarily have to be disposed at a position sandwiching the opening 31a. However, the arrangement of the two electronic components at a position sandwiching the opening 31a eliminates the need to provide an electronic component arrangement space in the region between the two electronic components in the circumferential direction of the opening 31a. Since the arrangement space of the connection part 630 in the area | region can be reduced by making the part 630 into the state raised, the structure which raises the connection part 630 is especially effective. It should be noted that the two electronic components are disposed at a position sandwiching the opening 31a only when the center of one electronic component, the center of the opening 31a, and the center of the other electronic component are aligned on a straight line. Absent. It is sufficient that at least a straight line connecting the center of one electronic component and the center of the other electronic component passes through the opening 31a.

As described above, the technique disclosed herein is a lens barrel including a first member and a second member that can move relative to each other, or a frame body, and first and first lenses provided on the frame body. This is useful for a lens barrel having two electronic components.

100 Lens barrel 200 Lens barrel body (second member)
210 Rear wall 212 Main body 213 First support part (support part)
215 Boss part 217 Notch part 241 1st pin (regulation part)
300 Master Flange 310 Rear Wall 313 Main Body 314 Boss 400 Imaging Unit 500 Image Blur Correction Device 510 Third Actuator (Driver)
511 Coil (first electronic component)
520 Fourth actuator (drive unit)
521 Coil (second electronic component)
530 Hall element (first electronic component)
540 Hall element (second electronic component)
600 Flexible printed circuit board 630 Connecting portion

630b Standing portion

630d Reinforcing plate 1 First lens frame 2 Second lens frame 3 Third lens frame (first member, frame)
31 Body 31a Opening (Passing Area)
31d Front (one side)
32 Cylindrical part (holding part)
35 3rd engaging part 37 Positioning pin 4 4th lens frame 40 Main part 41 Boss part G1 1st lens group G2 2nd lens group G3 3rd lens group G4 4th lens group G5 5th lens group L8 8th lens L9 9th lens L10 10th lens L11 11th lens O Imaging optical system (optical system)
Z optical axis

Claims

A first member having a lens and relatively movable in a substantially vertical plane in the optical axis direction;
A second member having a restricting portion for restricting relative movement of the first member in the substantially vertical plane;
The second member has a support part that supports the restriction part,
A lens barrel provided with a notch portion or a portion having rigidity lower than that of the support portion around the support portion.
A notch is provided around the support,
The support portion is partitioned by the notch and is formed in a substantially L shape.
The lens barrel according to claim 1.
A notch is provided around the support,
The support portion includes a main body section that is defined by the cutout portions, and ribs provided along the periphery of the main body portion.
The lens barrel according to claim 1.
The support part and the restriction part are formed separately.
The lens barrel according to claim 1.
The first electronic component and the second electronic component are disposed on one surface of the first member that is substantially orthogonal to the optical axis,
The first electronic component and the second electronic component are connected by a flexible printed circuit board,
The flexible printed circuit board extends between the first electronic component and the second electronic component in a state of rising from the one surface, and is bent from the state of rising and substantially parallel to the one surface. Being in a state and connected to the first electronic component and the second electronic component,
The lens barrel according to claim 1.
A reinforcing plate is provided on a portion of the flexible printed board that is substantially parallel to the one surface.
The lens barrel according to claim 5.
The portion of the flexible printed circuit board that is substantially parallel to the one surface is positioned by positioning pins provided on the one surface.
The lens barrel according to claim 5.