JP6645689B2 - Optical equipment - Google Patents

Description

  The present invention relates to an optical device.

  2. Description of the Related Art Conventionally, digital cameras have been required to have a small external size in terms of portability. The camera disclosed in Patent Document 1 has a layout in which a battery is disposed at the left end of the camera, a lens barrel is disposed at the center of the camera, and a strobe condenser is disposed at the right end of the camera in the lateral direction (left and right direction) of the camera when viewed from the subject side. By having it, miniaturization is realized.

Japanese Patent No. 4033543

  However, the layout of the camera disclosed in Patent Document 1 cannot meet the recent demand for downsizing of the camera.

  In view of such a problem, an object of the present invention is to provide an optical device that can be reduced in size without impairing its function.

An optical apparatus according to one aspect of the present invention includes a first optical system including: an imaging optical system; and a first region on an outer periphery that is parallel to an optical axis of the imaging optical system and has a first penetrating region . A cam ring, a second cam ring provided on the inner peripheral side of the first cam ring and including a follower pin that moves along a cam groove, An optical device comprising: a battery chamber including a second region in which a region is formed; and a flexible substrate disposed so as to cover the first and second penetrating regions , wherein the battery chamber includes the optical device. Are arranged in a first direction orthogonal to the optical axis of the imaging optical system, and the second penetrating region cuts the outer periphery of the battery chamber 201 in parallel with the optical axis, and Notching parallel to an axis and a second direction orthogonal to the first direction The first penetrating region is formed in an inner periphery of the first cam ring, and is formed in the cam groove used when transitioning between a shooting state and a collapsed state. In addition, a reinforcing member 301b is attached to a position of the area covering the first penetrating area of the flexible substrate, which is opposite to the first penetrating area through which the follower pin passes .

  ADVANTAGE OF THE INVENTION According to this invention, the optical apparatus which can be reduced in size without impairing a function can be provided.

FIG. 1 is a cross-sectional view of an imaging device, which is an example of an optical apparatus according to an embodiment of the present invention, when retracted. FIG. 4 is a cross-sectional view of the imaging device at the time of shooting. FIG. 2 is a development view of a lens barrel. It is an inner surface development view of a movable cam ring. It is an inner surface development view of a fixed cam ring. It is a perspective view of a lens barrel. FIG. 4 is a perspective view showing a state where a flexible substrate is attached to a lens barrel. It is a front view of the imaging device in an assembled state. It is a perspective view of a battery room. It is sectional drawing of the imaging device of an assembled state.

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

  First, the overall configuration of the lens barrel 200 of the present embodiment will be described with reference to FIGS. FIG. 1 is a cross-sectional view of an imaging device, which is an example of an optical apparatus according to an embodiment of the present invention, when retracted. FIG. 2 is a cross-sectional view of the imaging device at the time of shooting. FIG. 3 is a development view of the lens barrel 200.

  The lens barrel 200 has a three-group lens configuration, and includes a first-group unit, a second-group unit, and a third-group unit. The first group unit includes a first lens group 11, a first group lens holding frame 101 that holds the first lens group 11, and a first group ground plate 102 that holds the first group lens holding frame 101 and includes a lens barrier member that protects the lens. Having. The second group unit includes a second lens group 12, a diaphragm unit 103 serving as a light amount adjusting member, a second group lens holding frame 104 for holding the second lens group 12, and a second group ground plate 105 including a shutter member (not shown). . The third group unit has a third lens group 13 and a third lens holding frame 106 that holds the third lens group 13. In the imaging optical system of the lens barrel 200, the first lens group 11 and the second lens group 12 are lens groups of a variable power system. The third lens group 13 is a focus lens group for focusing on a subject. The second group unit corrects camera shake and the like during shooting by moving the second lens holding frame 104 in a direction orthogonal to the optical axis during shooting. In the present embodiment, the lens barrel 200 having a three-group lens configuration is used, but a lens barrel having a different configuration may be used.

  The third lens holding frame 106 is attached to the sensor holder 107 so as to be able to move straight along the optical axis. The image sensor 15 is attached to the sensor holder 107 via a sensor plate 111. An optical filter 14 sandwiched between a sensor holder 107 and a sensor rubber (not shown) is arranged at a front portion of the imaging element 15. In the hole of the sensor holder 107, a main guide shaft 113 parallel to the optical axis and a sub-guide shaft 114 for restricting rotation are press-fitted and fixed. Further, the sensor holder 107 is fixed by fastening the focus motor 115 with screws. When the lead screw 115a of the focus motor 115 rotates, a rack (not shown) attached to the third lens holding frame 106 is screwed into the lead screw 115a, so that the third lens holding frame 106 moves along the optical axis. Moving.

  Next, a cylindrical member for moving each lens group in the optical axis direction and a zoom drive mechanism will be described. FIG. 4 is a developed view of the inner surface of the movable cam ring 109. FIG. 5 is a developed view of the inner surface of the fixed cam ring 110. The sensor holder 107 is fixed by fastening the fixed cam ring 110 with screws. A movable cam ring 109 is provided on the inner periphery of the fixed cam ring 110. On the inner periphery of the movable cam ring 109, there is provided a linear guide cylinder 108 for restricting rotation when each lens group moves. The straight guide cylinder 108 and the moving cam ring 109 are bayonet-coupled and move integrally along the optical axis. The movable cam ring 109 is rotatable relative to the straight guide cylinder 108.

  As shown in FIG. 3, long grooves 108a, 108b, and 108c are formed on the inner periphery of the straight guide cylinder 108 along the optical axis. As shown in FIG. 4, cam grooves 109a, 109b, and 109c having different trajectories are formed on the inner periphery of the movable cam ring 109. As shown in FIG. 5, a cam groove 110a and a straight rectilinear guide groove 110b are formed on the inner periphery of the fixed cam ring 110. A follower pin 109d provided on the outer periphery of the movable cam ring 109 is fitted into the cam groove 110a, and the follower pin 109d moves along the cam groove 110a. Further, the rectilinear guide portion 108d provided in the rectilinear guide tube 108 is fitted into the rectilinear guide groove 110b, and the rotation of the rectilinear guide portion 108 is regulated by the guide groove 108. Only move straight ahead. A follower pin 102a provided on the outer periphery of the first group ground plate 102 is fitted into the cam groove 109a, and the follower pin 102a moves along the cam groove 109a. A follower pin 105a provided on the outer periphery of the second group ground plate 105 is fitted into the cam groove 109b, and the follower pin 105a moves along the cam groove 109b. A follower pin 103a provided on the outer periphery of the aperture unit 103 is fitted into the cam groove 109c, and the follower pin 103a moves along the cam groove 109c. The first group ground plate 102, the aperture unit 103, and the second group ground plate 105 are respectively linearly moved along the optical axis by being restricted in rotation by the long grooves 108a, 108b, 108c.

  A zoom motor 112 is attached to the sensor holder 107 via a gear train (not shown). A gear portion 109e that meshes with the final gear 116 of the gear train is formed on the outer periphery of the moving cam ring 109. When the zoom motor 112 is driven, a driving force is transmitted from the final gear 116 to the gear portion 109e, and the movable cam ring 109 rotates. At this time, since the follower pin 109d moves along the cam groove 110a, the moving cam ring 109 moves along the optical axis. Further, the rectilinear guide portion 108d rectilinearly moves along the rectilinear guide groove 110b, so that the rectilinear guide cylinder 108 linearly moves along the optical axis integrally with the movable cam ring 109. At this time, the first group unit, the aperture unit 103, and the second group unit that follow the moving cam ring 109 also move along the optical axis while rotation is restricted.

  FIG. 6 is a perspective view of the lens barrel 200. On the outer periphery (arc portion) of the fixed cam ring 110, a cutout portion (the length in the x direction) (parallel to the optical axis and the y direction) is formed for the purpose of miniaturization (reducing the length in the x direction). 1 region 110c is formed. In the inner periphery of the fixed cam ring 110, a cam groove 110a is formed in a region corresponding to a region in which the cutout portion 110c is formed, so that the cutout portion 110c has a hole through the fixed cam ring 110. (First penetration region) 110d is formed. In the present embodiment, the hole 110d, which is a part of the cam groove 110a, is used when the lens barrel 200 transitions between the collapsed state and the photographing state, and is an area where high precision and high strength are not required. .

  Next, a configuration of the flexible board 301 for electrically connecting the focus motor 115 and the zoom motor 112 to the power supply board will be described with reference to FIG. FIG. 7 is a perspective view showing a state where the flexible substrate 301 is attached to the lens barrel 200. On the flexible substrate 301, an electrical connection pattern for connecting to a terminal portion 115b of the focus motor 115 and a terminal portion (not shown) of the zoom motor 112 is formed. The electrical connection pattern is connected to the power supply board on the camera body side via the connection portion 301a.

  The flexible substrate 301 is arranged so as to cover the hole 110d formed in the cutout 110c of the fixed cam ring 110. By covering the hole 110d with the flexible substrate 301, the hole 110d is not exposed to the outside, so that entry of dust or the like from the hole 110c can be prevented. Further, a reinforcing plate (reinforcement member) 301b is attached to a position of the area covering the hole 110d of the flexible substrate 301 at a position facing the hole 110d. Therefore, it is possible to prevent the follower pin 109d of the movable cam ring 109 from accidentally damaging the flexible substrate 301 when passing through the hole 110d. In addition, since the reinforcing plate 301b is a light shielding member, it is possible to prevent light from entering from outside. Furthermore, by applying light-shielding printing to a region covering the hole 110d of the flexible substrate 301, it is possible to further enhance light-shielding properties.

  Here, an arrangement relationship of each component of the imaging apparatus according to the present embodiment will be described with reference to FIG. FIG. 8 is a front view of the imaging device in an assembled state. The lens barrel 200 is arranged at a substantially central position of the imaging device. A battery chamber 201 for storing a battery is disposed on the left side of the lens barrel 200. The strobe light emitting unit 202 is arranged on the right side of the lens barrel 200.

  FIG. 9 is a perspective view of the battery chamber 201 in the present embodiment. A cutout portion 201a is formed on the outer periphery of the battery chamber 201 to shorten the length of the imaging device in the x direction. By forming the notch 201a (by cutting the outer periphery of the battery chamber 201 in parallel with the optical axis and the y direction), a hole (a second penetrating region) 201b is formed in the center of the notch 201a. Is formed.

  FIG. 10A is a cross-sectional view of the imaging device in an assembled state, and FIG. 10B is an enlarged view of a portion A surrounded by a dotted line in FIG. As shown in FIGS. 10A and 10B, in the present embodiment, the cutout portion 110c of the lens barrel 200 and the cutout portion 201a of the battery chamber 201 are arranged to face each other, and the flexible substrate 301 has a hole. It is arranged so as to cover the parts 110d and 201b. With this arrangement, the inside of the lens barrel 200 and the battery chamber 201 is not exposed. Therefore, in the present embodiment, it is possible to provide an optical device that can be reduced in size without impairing the function.

  As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

110c Notch (area)
110d hole (penetration area)
200 lens barrel 301 flexible substrate

Claims (3)

A first cam ring including: an imaging optical system; and a first region on an outer periphery thereof, which is parallel to an optical axis of the imaging optical system and has a first penetrating region ,
A second cam ring which is disposed on the inner peripheral side of the first cam ring and includes a follower pin which moves along a cam groove;
A battery chamber including a second region in which a second penetrating region is formed at a position opposite to the first region;
An optical apparatus having a flexible substrate disposed so as to cover the first and second penetrating regions ,
The battery chamber is disposed in a first direction orthogonal to an optical axis of the imaging optical system with respect to the optical device,
The second penetrating region is formed by cutting out the outer periphery of the battery chamber in parallel with the optical axis and cutting out in parallel with the optical axis and a second direction orthogonal to the first direction. Yes,
The first penetrating region is formed in an inner periphery of the first cam ring, and is formed in the cam groove used when transitioning between a shooting state and a collapsed state,
An optical device , wherein a reinforcing member is attached to a position of the flexible substrate that covers the first penetrating region and that is opposite to the first penetrating region through which the follower pin passes . The optical device according to claim 1, wherein the reinforcing member is a light shielding member. The optical device according to claim 1, wherein a light-shielding print is applied to a region of the flexible substrate that covers the first penetrating region.