JP2016048295A - Inflection optical type zoom device with camera shake correction function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inflection optical type zoom device with a camera shake correction function in which with rotation of a reflection member, the optical axis of a reflection ray reflected from a reflection surface does not deviate from the optical axis of a zoom lens group, and quality of a photographic image does not deteriorate.SOLUTION: An inflection optical type zoom device with a camera shake correction function includes a reflection member inflecting an incident optical axis, and a zoom lens group having a plurality of lenses. In the zoom device, the reflection member is fitted to a rotation member formed into a cut-off spherical shape, a reflection member is formed on the center of the spherical arc surface of the rotation member, the center of the spherical arc surface is provided on the optical axis of the zoom lens group, and the rotation member is held rotatably along the spherical arc surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bending optical zoom device having a camera shake correction function used for a camera such as a mobile phone.

  A bending optical zoom device equipped with a camera shake correction function (hereinafter referred to as a bending optical zoom device with a camera shake correction function) mounted on a camera such as a mobile phone is provided with an objective lens disposed on the subject side, a reflecting member, And a zoom lens group. A bending optical zoom device with a camera shake correction function is a zoom lens group provided behind a reflecting member (advancing direction of the light beam) by bending a light beam incident from the subject side by 90 degrees with a reflecting member such as a mirror or a prism, In addition, image blurring is suppressed while leading to an image sensor. More specifically, when camera shake occurs during shooting with the camera, the reflecting member is rotated according to the direction of camera shake and the speed of camera shake to suppress blurring of the image formed on the image sensor. is there.

  For example, Patent Document 1 proposes a bending optical zoom device 500 with a camera shake correction function configured as shown in FIG. The bending optical zoom device 500 with a camera shake correction function has a configuration in which an objective lens 501, a reflecting member 502, a zoom lens group 503, and an image sensor 504 are housed in a case 505. Here, the optical axis O5 of the objective lens 501 is the Z-axis direction, and the subject side is the front of the Z-axis (+ Z side or + Z direction). The axes orthogonal to the Z axis and orthogonal to each other are defined as an X axis and a Y axis, respectively, and the optical axis P5 of the zoom lens group 503 is defined as a Y axis direction.

  The light beam from the subject passes through the objective lens 501 and reaches the reflecting surface 502R of the reflecting member 502 made of a mirror. The light beam that has reached the reflecting surface 502R is reflected from the reflecting surface 502R toward the zoom lens group 503, passes through the zoom lens group 503, and forms an image on the image sensor 504. The zoom lens group 503 is a combination of a plurality of lenses that are movable in the Y-axis direction. The zoom lens group 503 scales an object image and focuses it on the image sensor 504.

  As shown in FIGS. 6B to 6D, the reflecting member 502 is supported so as to be rotatable around the straight line S and the straight line T by a protrusion 506 connected so as to contact the back surface 502H. . A piezoelectric actuator 507S and a piezoelectric actuator 507T are attached to the back surface 502H of the reflecting member 502.

  Here, when the line on the back surface 502H connecting the protrusion 506 and the piezoelectric actuator 507T is a straight line S, and the line on the back surface 502H connecting the protrusion 506 and the piezoelectric actuator 507S is a straight line T, the straight line S The straight lines T are orthogonal to each other.

  When the piezoelectric actuator 507S expands and contracts, the reflecting member 502 rotates around the straight line S, and when the piezoelectric actuator 507T expands and contracts, the reflecting member 502 rotates around the straight line T. When camera shake occurs, either or both of the piezoelectric actuator 507S and the piezoelectric actuator 507T expand and contract in accordance with the direction of camera shake and the speed of camera shake. As a result, the reflecting member 502 rotates about the contact portion with the protruding portion 506 as a fulcrum, so that the direction of the optical axis of the reflected light changes, and image blurring on the image sensor 504 is suppressed.

JP 2004-219930 A

  However, since the reflecting member 502 rotates with the contact portion between the back surface 502H and the protrusion 506 as a fulcrum, the center of the rotating operation is at a position retracted from the reflecting surface 502R by the thickness t of the reflecting member 502. The center of rotation does not exist on the reflecting surface 502R. Therefore, the optical axis of the reflected light reflected by the reflecting surface 502R is deviated from the optical axis P5 of the zoom lens group 503 because the reflection point R5 of the incident optical axis moves as the reflecting member 502 rotates. As a result, the bending optical zoom device 500 with a camera shake correction function has a problem that an image formed on the image sensor 504 is distorted with a camera shake correction operation, and the quality of the photograph is greatly impaired.

  In the present invention, the optical axis of the reflected light beam reflected by the reflecting surface does not deviate from the optical axis of the zoom lens group with the rotation of the reflecting member, so that the quality of the captured image is not deteriorated. An object is to provide an optical zoom device.

The present invention is a bending optical zoom device with a camera shake correction function including a reflecting member that bends an incident optical axis and a zoom lens group having a plurality of lenses, and the reflecting member is a rotating member that forms a cut spherical shape. Mounted, the reflecting surface is formed on the center of the spherical arc surface of the rotating member, the center of the spherical arc surface is provided on the optical axis of the zoom lens group, and the rotating member can rotate along the spherical arc surface It was set as the structure pinched by.
In the bending optical zoom device with a camera shake correction function according to the present invention, the optical axis of the reflected light on the reflecting surface does not move when the reflecting member rotates due to camera shake. For this reason, since the image formed on the image sensor is not distorted, the photographing quality is not deteriorated.

Further, the present invention is a bending optical zoom device with a camera shake correction function, comprising vibration means for holding the rotating member, the drive end of the vibrating means abuts on the spherical surface of the rotating member, and the rotating member is the vibrating means. It was set as the structure which rotates along a spherical arc surface, when the drive end of No. vibrates.
Thereby, the rotation member which uses the center of a spherical arc surface as a fulcrum can be rotated, without moving the optical axis of the reflected light in a reflective surface.

In the present invention, the vibration means is a piezoelectric vibration member.
As a result, the rotating member can be accurately rotated according to camera shake with the center of the spherical arc surface as a fulcrum.

In the present invention, the vibration means is a magnetostrictive vibration member.
As a result, the rotating member can be accurately rotated according to camera shake with the center of the spherical arc surface as a fulcrum.

The present invention also includes a first magnetic attraction member that is opposed to the radial direction of the ball arc surface of the rotating member with a gap and is attached to the ball arc surface, and a radial direction of the ball arc surface of the rotating member. A second magnetic attraction member facing the air gap and attached to the fixed side of the rotating member, wherein at least one of the first magnetic attraction member and the second magnetic attraction member is a permanent magnet It was.
Thereby, the restoring force which faces the direction before the said rotation by rotation can be given to a reflection member.

  The summary of the invention does not list all necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

1A and 1B are a perspective view and a main part sectional view showing a bending optical zoom device with a camera shake correction function according to a first embodiment of the present invention. It is the perspective view and principal part sectional drawing which show the bending optical zoom apparatus with a camera-shake correction function which concerns on Embodiment 2 of this invention. It is a perspective view which shows the bending optical zoom apparatus with a camera-shake correction function which concerns on Embodiment 3 of this invention. It is the perspective view and side view which show the bending optical zoom apparatus with a camera-shake correction function which concerns on Embodiment 4 of this invention. It is a perspective view which shows the principal part of the bending optical zoom apparatus with a camera-shake correction function which concerns on Embodiment 4 of this invention. It is a figure which shows the conventional bending optical zoom apparatus with a camera-shake correction function.

  Hereinafter, the present invention will be described in detail through embodiments. However, the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

Embodiment 1
FIG. 1A is a perspective view showing a bending optical zoom device 100 with a camera shake correction function according to the first embodiment, and FIG. 1B is a schematic diagram of the bending optical zoom device 100 with a camera shake correction function. FIG.
As shown in FIG. 1, a bending optical zoom device 100 with a camera shake correction function includes an objective lens 101, a reflecting member 102 that refracts an incident optical axis, a zoom lens group 103 having a plurality of lenses, and a mirror. The image sensor 104 is accommodated in the case 105. Here, in this specification, the optical axis O1 of the objective lens 101 is the Z (Z-axis) direction, and the subject side is the Z-axis front (+ Z side or + Z direction). The axes orthogonal to the Z axis and orthogonal to each other are defined as an X (X axis) direction and a Y (Y axis) direction, respectively, and the optical axis P1 of the zoom lens group 103 is defined as a Y axis direction.

  Light rays from the subject pass through the objective lens 101 and reach the reflecting surface 102R of the reflecting member 102. The light beam that has reached the reflecting surface 102R is reflected toward the zoom lens group 103, passes through the zoom lens group 103, and forms an image on the image sensor 104. The zoom lens group 103 is a combination of a plurality of lenses that can move in the Y-axis direction. The zoom lens group 103 scales the image of the subject and focuses it on the image sensor 104.

  The reflecting member 102 is attached to the excavation lower surface 106D of the rotating member 106A having a cut spherical shape, and the reflecting surface 102R is formed on the center W of the spherical arc surface 106G of the rotating member 106A. An intersection V between the optical axis P1 of the zoom lens group 103 and the reflecting surface 102R coincides with the center W of the spherical arc surface 106G of the rotating member 106A. The vibration means 107A1 to vibration means 107A4 are piezoelectric vibration members having a stepped prismatic shape, and sandwich the spherical arc surface 106G in the diametrical direction by a tip side surface 107AS formed as a drive end. The objective lens 101 is attached to the case 105 so that its optical axis O1 passes through the center W of the spherical arc surface 106G.

  Specifically, the vibrating means 107A1 to the vibrating means 107A4 extend so as to be parallel to the normal Mn of the reflecting surface 102R passing through the center W of the spherical arc surface 106G. Here, the reflective surface 102R side of the normal Mn is defined as the front, and the opposite side of the reflective surface 102R is defined as the rear. In addition, an axis parallel to the X axis and passing through the intersection V is defined as the axis Mx, the + X direction is defined as the + Mx side, and the −X direction is defined as the −Mx side. Further, an axis on the reflecting surface 102R orthogonal to the axis Mx is defined as the axis Mr, and the + Y direction is defined as the + Mr side, and the −Y direction is defined as the −Mr side.

  Vibrating means 107A1 to vibrating means 107A4 are arranged at intervals of 90 degrees on the outermost peripheral portion of the rotating member 106A around the normal Mn. The vibration means 107A1 is disposed on the + Mr side, and the vibration means 107A2 is disposed on the −Mx side. The vibration means 107A3 is disposed on the −Mr side, and the vibration means 107A4 is disposed on the + Mx side.

  Each tip side surface 107AS and the base corner portion 107AK of the tip side surface 107AS are in contact with the spherical arc surface 106G. Specifically, the vibrating means 107A1 and the vibrating means 107A3 are a pair, and sandwich the rotating member 106A opposite to the radial direction of the rotating member 106A on the axis Mr. Further, the vibration means 107A2 and the vibration means 107A4 are a pair, and sandwich the rotation member 106A opposite to the radial direction of the rotation member 106A on the axis Mx.

  As shown in FIG. 1B, a first magnetic attraction member 108M made of a soft magnetic material is attached on the spherical arc surface 106G behind the normal line Mn. Further, a second magnetic attraction member 108N made of a permanent magnet material is attached to the case 105 side further behind the normal line Mn. The first magnetic attraction member 108M and the second magnetic attraction member 108N are opposed to each other with a gap in the direction of the normal Mn, and an attractive force is applied to each other. Therefore, the rotation member 106A is pulled toward the rear of the normal line Mn, and is lowered to the rear until the spherical arc surface 106G comes into contact with the root corner portion 107AK of the tip side surface 107AS. Thereby, the rotation member 106A can be rotated about the center W as a fulcrum and stably supported by the distal end side surface 107AS and the base corner portion 107AK of the vibration unit 107A1 to the vibration unit 107A4.

The second magnetic attraction member 108N is attached to the case 105 side on the normal Mn before the rotation member 106A is rotated as an initial position (on the Y and Z planes). Between the magnetic attraction member 108M and the second magnetic attraction member 108N, there is an attraction force for turning the rotation member 106A toward the rear of the normal Mn and a restoring force toward the initial position before being rotated. Always granted. Therefore, when the rotating member 106A is rotated, it is easy to return the reflecting member 102 to the initial direction before being rotated.
As a result, the intersection V between the optical axis P1 and the reflecting surface 102R does not move even when the reflecting member 102 attached to the rotating member 106A rotates. Therefore, the optical axis of the reflected light does not deviate from the optical axis P1 of the zoom lens group 103 on the reflective surface 102R.

Next, the operation of the vibration means 107A1 to vibration means 107A4 made of piezoelectric vibration members will be described.
As shown in FIG. 1B, the vibrating means 107A1 to 107A4 are expanded and contracted in a direction parallel to the normal line Mn, so that the rotating member 106A is stably supported with the center W as a fulcrum. And can be accurately rotated. The vibration means 107A1 to the vibration means 107A4 expand and contract by being supplied with a saw-tooth voltage that has a gentle rise and a sharp fall.

  The vibration means 107A1 shown in FIG. 1B is disposed on the side portion (lower right side of the paper) of the rotation member 106A, and the vibration means 107A3 is disposed on the side portion (upper left side of the paper surface) of the rotation member 106A. The rotating member 106A is sandwiched between the front end side surfaces 107AS. For example, when the vibration means 107A1 is gently contracted and the vibration means 107A3 is gently extended, the rotation member 106A is rotated around the axis Mx (clockwise). Further, when the vibration means 107A1 contracts rapidly and the vibration means 107A3 rapidly expands, the contact portion between the tip side surface 107AS of the vibration means 107A1 and the vibration means 107A3 and the spherical arc surface 106G slips, and the rotating member 106A moves to the right. It is held in a state of being rotated around. By repeating this operation, the rotation of the rotation member 106A can be continued. Further, the rotation speed can be increased by increasing the expansion and contraction amplitudes of the vibration means 107A1 and the vibration means 107A3. Further, when the vibration means 107A1 extends and the vibration means 107A3 contracts, the rotation member 106A rotates about the axis Mx (counterclockwise).

  The rotating member 106A rotates about the axis Mr by expanding and contracting the vibrating means 107A2 and the vibrating means 107A4. Further, the expansion and contraction of the vibration means 107A1 and the vibration means 107A3 and the expansion and contraction of the vibration means 107A2 and the vibration means 107A4 are simultaneously performed, so that the rotation member 106A can be rotated around an arbitrary axis in the reflecting surface 102R. .

  As described above, the bending optical zoom device 100 with the camera shake correction function according to the first embodiment has the intersection V between the optical axis P1 and the reflecting surface 102R when the reflecting member 102 is rotated corresponding to the camera shake. Does not move. For this reason, the optical axis of the reflected light does not deviate from the optical axis P1 of the zoom lens group 103 on the reflecting surface 102R, and both blurring and distortion of the image on the image sensor 104 can be suppressed, and a high-quality photograph. Can be taken.

  In the first embodiment, the first magnetic attraction member 108M is made of a soft magnetic material, and the second magnetic attraction member 108N is made of a permanent magnet material. However, the first magnetic attraction member 108M is not limited to this. The attraction member 108M may be made of a permanent magnet material, and the second magnetic attraction member 108N may be made of a soft magnetic material. Further, although the example in which the rotation member 106A rotates about the axis Mx and the axis Mr has been shown, the present invention is not limited to this, and the rotation member 106A is configured to rotate around another axis passing through the center W of the spherical arc surface 106G. Also good. Further, the reflecting member 102 is not limited to a mirror, and a prism or the like may be used. Furthermore, the objective lens 101 may be attached to the rotating member 106 </ b> A together with the reflecting member 102 and rotated together with the reflecting member 102.

Embodiment 2
FIG. 2A is a perspective view showing the bending optical zoom device 100 with a camera shake correction function according to the second embodiment, and FIG. 2B shows the essential parts of the bending optical zoom device 100 with a camera shake correction function. FIG.
As shown in the figure, a bending optical zoom device 100 with a camera shake correction function according to this embodiment includes an objective lens 101, a reflecting member 102 made of a mirror, a zoom lens group 103, and an image sensor 104. Although it is the same as in the first embodiment in that it is housed inside, it is implemented in that it includes various members constituting the rotation member 106Bi and vibration means 107B1 to vibration means 107B4 that support and drive the rotation member 106Bi. Different from Form 1.

  The light beam irradiated from the subject passes through the objective lens 101 and reaches the reflecting surface 102R of the reflecting member 102. The light beam that has reached the reflecting surface 102R is reflected from the reflecting surface 102R toward the zoom lens group 103, passes through the zoom lens group 103, and forms an image on the image sensor 104. The zoom lens group 103 is a combination of a plurality of lenses that are movable in the Y-axis direction. The zoom lens group 103 scales the image of the subject and focuses it on the image sensor 104.

  The reflecting member 102 is attached to the excavation lower surface 106D of the rotating member 106Bi made of a cut spherical soft magnetic member. The intersection V between the optical axis P1 of the zoom lens group 103 and the reflecting surface 102R coincides with the center W of the spherical arc surface 106G of the rotating member 106Bi. The vibration means 107B1 to the vibration means 107B4 are magnetostrictive vibration members having a stepped prism shape, and the spherical arc surface 106G is sandwiched in the diameter direction by the tip side surface 107BS formed as a driving end. The objective lens 101 is attached to the case 105 so that its optical axis O1 passes through the center W of the spherical arc surface 106G.

  The vibration means 107B1 to vibration means 107B4 each extend in parallel with the normal Mn of the reflection surface 102R passing through the center W of the spherical arc surface 106G. A driving coil 107b is wound around each of the vibration means 107B1 to 107B4 along the extending direction of the vibration means 107B1 to the vibration means 107B4.

  Vibrating means 107B1 to vibrating means 107B4 are arranged at intervals of 90 degrees on the outermost peripheral portion of the rotating member 106Bi around the normal line Mn. The vibration means 107B1 is disposed on the + Mr side, the vibration means 107B2 is disposed on the −Mx side, the vibration means 107B3 is disposed on the −Mr side, and the vibration means 107B4 is disposed on the + Mx side.

  Each tip side surface 107BS and the base corner portion 107BK of the tip side surface 107BS are in contact with the spherical arc surface 106G. More specifically, the pair of the vibration means 107B1 and the vibration means 107B3 is opposed to the radial direction of the rotation member 106Bi on the axis Mr so as to sandwich the rotation member 106Bi, and the pair of the vibration means 107B2 and the vibration means 107B4 is The rotation member 106Bi is sandwiched so as to face the radial direction of the rotation member 106Bi on the axis Mx.

2B, a magnetic bias member 109 made of a permanent magnet is attached to the case 105 side behind the normal line Mn. The spherical arc surface 106G of the rotation member 106Bi and the magnetic bias member 109 face each other with a gap in the direction of the normal line Mn, and an attractive force is applied to each other. Therefore, the rotation member 106Bi is pulled toward the rear of the normal line Mn, and is pulled back until the spherical arc surface 106G comes into contact with the root corner portion 107BK of the tip side surface 107BS. As a result, the rotation member 106Bi can be rotated with the center W as a fulcrum and stably supported by the distal end side surface 107BS and the base corner portion 107BK of the vibration means 107B1 to 107B4. To do.
As a result, the intersection V between the optical axis P1 and the reflecting surface 102R does not move even when the reflecting member 102 attached to the rotating member 106Bi is rotated, and the optical axis of the reflected light is on the reflecting surface 102R. There is no deviation from the optical axis P1 of the zoom lens group 103. That is, the optical axis of the reflected light always coincides with the optical axis P1 of the zoom lens group 103.

Next, the operation of the vibration means 107B1 to vibration means 107B4 made of magnetostrictive vibration members will be described.
The vibration means 107B1 to vibration means 107B4 are provided in the magnetic circuit together with the magnetic bias member 109 and the rotation member 106Bi. A DC magnetic bias magnetic field is applied to the vibrating means 107B1 to 107B4 in the longitudinal direction by the magnetic bias member 109. The drive coil 107b wound around the vibration means 107B1 to the vibration means 107B4 is supplied with a sawtooth current having a gentle rise and a sharp fall, so that the vibration means 107B1 to the vibration means 107B4 expand and contract. Vibrate.

  The rotation member 106Bi can rotate about the center W as a result of the vibration means 107B1 to vibration means 107B4 extending and contracting in a direction parallel to the normal Mn. Specifically, as shown in FIG. 2 (b), the vibration means 107B1 is disposed on the side portion (lower right side of the paper) of the rotation member 106Bi, and the vibration means 107B3 is disposed on the side portion (paper surface of the rotation member 106Bi). Each tip side surface 107BS sandwiches the rotation member 106Bi. For example, when the vibration unit 107B1 is gently contracted and the vibration unit 107B3 is gently expanded, the rotation member 106Bi rotates clockwise around the axis Mx. Further, for example, when the vibration means 107B1 contracts rapidly and the vibration means 107B3 rapidly expands, the contact portion between the tip side surface 107AS of the vibration means 107B1 and the vibration means 107B3 and the spherical arc surface 106G slips, and the rotation member 106Bi is held in a state of being rotated clockwise. The rotation of the rotation member 106Bi is continued by repeating the above operation. Further, the vibration means 107B1 and the vibration means 107B3 can increase the rotation speed by increasing the amplitude of expansion and contraction during vibration.

  Further, the rotation member 106Bi rotates counterclockwise around the axis Mx when the vibration unit 107B1 extends and the vibration unit 107B3 contracts. Further, the rotation member 106Bi rotates around the axis Mr when the vibration unit 107B2 and the vibration unit 107B4 expand and contract. Furthermore, if expansion / contraction of the vibration means 107B1 and the vibration means 107B3 and expansion / contraction of the vibration means 107B2 and the vibration means 107B4 are performed simultaneously, the rotation member 106Bi can be rotated around an arbitrary axis in the reflecting surface 102R.

  As described above, the bending optical zoom device 100 with the camera shake correction function according to the second embodiment has the intersection V between the optical axis P1 and the reflecting surface 102R when the reflecting member 102 is rotated in response to the camera shake. Does not move. Therefore, the optical axis of the reflected light does not deviate from the optical axis P1 of the zoom lens group 103 on the reflective surface 102R. As a result, the bending optical zoom device 100 with a camera shake correction function can suppress both blurring and distortion of an image on the image sensor 104, and can take a high-quality photograph.

Embodiment 3
FIG. 3 is a perspective view showing a bending optical zoom device 100 with a camera shake correction function according to the third embodiment.
The bending optical zoom device 100 with a camera shake correction function according to the present embodiment is the same as the above embodiment in that vibration means 107B5 to vibration means 107B8 made of magnetostrictive vibration members are used. The first reflecting member 102Bi made of a mirror, the second reflecting member 102Bo, the zoom lens group 103, and the image sensor 104 are housed in the case 105, and the first reflecting member 102Bi is fixed, The difference is that the two reflecting members 102Bo are rotated.

  In the bending optical zoom device 100 with a camera shake correction function according to the third embodiment, a light beam from a subject passes through the objective lens 101 and reaches the first reflecting member 102Bi. The light beam that has reached the first reflecting member 102Bi is reflected toward the zoom lens group 103, passes through the zoom lens group 103, and reaches the second reflecting member 102Bo. The light beam reflected by the reflecting surface 102Ro of the second reflecting member 102Bo forms an image on the image sensor 104 disposed on the + Z side of the second reflecting member 102Bo. The zoom lens group 103 is a combination of a plurality of lenses that are movable in the Y-axis direction. The zoom lens group 103 scales an object image and focuses it on the image sensor 104.

  The second reflecting member 102Bo is attached to the excavation lower surface 106D of the rotating member 106Bo made of a cut spherical soft magnetic member. The optical axis P1 of the zoom lens group 103 passes through the center W of the spherical arc surface 106G of the rotating member 106Bo.

The vibration means 107B5 to the vibration means 107B8 are made of a magnetostrictive vibration member having a stepped prism shape as in the second embodiment. The vibration means 107B5 to the vibration means 107B8 sandwich the spherical arc surface 106G of the rotation member 106Bo in the diameter direction by the tip side surface 107BS formed as a drive end. In addition, each tip side surface 107BS and the base corner portion 107BK of the tip side surface 107BS are in contact with the spherical arc surface 106G.
The vibration means 107B5 to the vibration means 107B8 are provided in the magnetic circuit together with the magnetic bias member 109 and the rotation member 106Bo, and a DC magnetic bias magnetic field is applied in the longitudinal direction by the magnetic bias member 109. The vibration means 107B5 to the vibration means 107B8 are expanded and contracted by supplying a saw-tooth current with a gentle rise to the drive coil 107b wound around the vibration means 107B5 to the vibration means 107B8. Vibrate.

  Even in such a bending optical zoom device 100 with a camera shake correction function including a plurality of reflecting members, the rotating member 106Bo has the center W by the tip side surface 107BS and the base corner portion 107BK of the vibrating means 107B5 to 107B8. The fulcrum is used as a fulcrum and is stably supported so as to be pivotable and is pivoted accurately. Therefore, the bending optical zoom device 100 with a camera shake correction function can suppress both blurring and distortion of an image on the image sensor 104, and can take a high-quality photograph. In addition to the rotating member 106Bo, the bending optical zoom device 100 with a camera shake correction function attaches the first reflecting member 102Bi to the rotating member 106Bi as in the second embodiment, and the first reflecting member 102Bi. And the second reflecting member 102Bo may be rotated.

Embodiment 4
FIG. 4A is a perspective view showing the bending optical zoom device 100 with a camera shake correction function according to the fourth embodiment, and FIG. 4B is a side view of the bending optical zoom device 100 with a camera shake correction function. It is. FIG. 5 is a perspective view showing the main part of the bending optical zoom device 100 with a camera shake correction function according to the present embodiment and a diagram for explaining the operation.
In the bending optical zoom device 100 with a camera shake correction function according to the present embodiment, an objective lens 101, a reflecting member 102 including a mirror, a zoom lens group 103, and an image sensor 104 are housed in a case 105.

  Light rays from the subject pass through the objective lens 101 and reach the reflecting surface 102R of the reflecting member 102. The light beam that has reached the reflecting surface 102R is reflected toward the zoom lens group 103, passes through the zoom lens group 103, and forms an image on the image sensor 104. The zoom lens group 103 is a combination of a plurality of lenses that can move in the Y-axis direction. The zoom lens group 103 scales an object image and focuses it on the image sensor 104.

  The reflecting member 102 is attached to the cut surface 106E side of the rotating member 106C having a cut spherical shape. An intersection V between the optical axis P1 of the zoom lens group 103 and the reflecting surface 102R coincides with the center W of the spherical arc surface 106G of the rotating member 106C. A tip edge portion 107CC, which is a driving end of three vibrating means 107C1 to 107C3 made of a piezoelectric vibrating member and forming a columnar shape, is in contact with the spherical arc surface 106G. The objective lens 101 is attached to the case 105 so that its optical axis O1 passes through the center W of the spherical arc surface 106G.

  As shown in the exploded perspective view of FIG. 5A, each of the vibrating means 107C1 to 107C3 faces the center W of the spherical arc surface 106G and around the normal Mn of the reflecting surface 102R passing through the center W. It is arranged at equal intervals. A first magnetic attraction member 108M made of a soft magnetic material is attached to the spherical arc surface 106G on the rear side on the normal line Mn. Furthermore, a second magnetic attraction member 108N made of a permanent magnet material is attached to the case 105 side behind the normal Mn. The first magnetic attraction member 108M and the second magnetic attraction member 108N are opposed to each other with a gap in the direction of the normal Mn.

That is, the rotating member 106C having a cut spherical shape and having the first magnetic attraction member 108M attached thereto is attracted rearward in the normal Mn direction by the second magnetic attraction member 108N attached to the case 105, and the leading edge portion 107CC is supported by the vibration means 107C1 to the vibration means 107C3 which are in contact with each other so as to be stably rotatable. Since the tip edge portion 107CC of the vibrating means 107C1 to 107C3 is in contact with the spherical arc surface 106G of the rotating member 106C, the rotating member 106C is rotated about the center W by piezoelectric vibration. Can do.
Thus, when the reflecting member 102 attached to the rotating member 106C is rotated, the intersection V between the optical axis P1 and the reflecting surface 102R does not move, and the optical axis of the reflected light is the reflecting surface 102R. Above, there is no deviation from the optical axis P1 of the zoom lens group 103.

Next, the vibrating means 107C1 to 107C3 for rotating the rotating member 106C will be described.
As shown in FIG. 5B, the vibration means 107C1 to 107C3 can rotate the rotation member 106C around the optical axis P1 and the axis Mx with the center W as a fulcrum by individually vibrating. As a result, the reflecting member 102 can rotate around the axis Mx and the axis Mr (see FIG. 5B) around the intersection V between the optical axis P1 and the reflecting surface 102R.

That is, in the vibration means 107C1 to the vibration means 107C3, the tip edge 107CC abuts on the spherical arc surface 106G of the rotating member 106C along the axis E1, the axis E2, and the axis E3, and the tip edge 107CC vibrates individually. .
As shown in FIG. 5C, the longitudinal wave and the transverse wave are combined by applying an alternating voltage to the vibration means 107C1 to the vibration means 107C3 at the tip edge portion 107CC where the plurality of protrusions 107CD are formed. Traveled waves are formed, and bending elastic waves are generated along the circumferential direction. In this way, for example, when the vibrating means 107C1 contacting the spherical arc surface 106G is vibrated along the axis E1, the rotating member 106C is rotated in an arbitrary direction e1 around the axis E1 (clockwise or counterclockwise). Can be made. Similarly, if the other vibrating means 107C2 to 107C3 are vibrated, the rotating member 106C is rotated in any direction e2, e3 around the axis E2 and around the axis E3 (clockwise or counterclockwise), respectively. Can be moved.

  Then, by synthesizing the rotation around the axis E1 to the axis E3 by the vibration means 107C1 to 107C3, the rotation member 106C and thus the reflection member 102 is rotated about the axis Mx or the axis Mr. You can make it.

  As described above, in the bending optical zoom device 100 with the camera shake correction function according to the fourth embodiment, it is stably supported so as to be rotatable about the center W and is rotated accurately. The image formed in the image is not distorted, and a high-quality photograph can be taken.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is apparent from the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

100 Bending optical zoom device with camera shake correction function,
101 objective lens,
102, 102Bi, 102Bo reflective member,
102R, 102Ro reflecting surface,
103 zoom lens group,
104 Image sensor,
105 cases,
106A, 106Bi, 106Bo, 106C Rotating member,
106G spherical arc surface,
107A1-107A4, 107B1-107B8, 107C1-107C3 Vibrating means.

Claims (5)

A reflecting member that bends the incident optical axis;
A zoom lens group having a plurality of lenses;
A bending optical zoom device with a camera shake correction function,
The reflecting member is attached to a rotating member having a cut spherical shape, and a reflecting surface is formed on the center of the spherical arc surface of the rotating member,
The center of the spherical arc surface is provided on the optical axis of the zoom lens group,
The bending optical zoom device with a camera shake correction function, wherein the rotating member is held so as to be rotatable along the spherical arc surface. The bending optical zoom device with a camera shake correction function includes a vibrating means for holding the rotating member,
The drive end of the vibration means is in contact with the spherical surface of the rotating member;
2. The bending optical zoom device with a camera shake correction function according to claim 1, wherein the rotating member rotates along the spherical arc surface when the driving end of the vibration unit vibrates.   The bending optical zoom device with a camera shake correction function according to claim 2, wherein the vibration unit includes a piezoelectric vibration member.   The bending optical zoom device with a camera shake correction function according to claim 2, wherein the vibration unit includes a magnetostrictive vibration member. A first magnetic attraction member which is opposed to the radial direction of the spherical arc surface of the rotating member with a gap and is attached to the spherical arc surface;
A second magnetic attraction member that is opposed to the radial direction of the arcuate surface of the rotating member with a gap and is attached to the fixed side of the rotating member;
With
5. The bending optical zoom device with a camera shake correction function according to claim 1, wherein at least one of the first magnetic attraction member and the second magnetic attraction member is a permanent magnet. .