JP2005189414A - Imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide an imaging apparatus capable of easily performing focusing operation. <P>SOLUTION: The imaging device 21 is constituted of an imaging lens 40, a lens barrel 41, an imaging device 42, an infrared ray cut filter 43 and a filter holding member 44. The lens barrel 41 is constituted of a lens holding frame 52, a cam ring for macro switching 53, a cam ring for focusing 54, a fixed barrel 55 and a coil spring 56. The fixed barrel 55 has a cam pin 80. In the cam ring 54, an annular part 71, a knob part 72 and a projecting part for blocking the flow of an adhesive 73 are integrally formed. A cam surface 74 is formed in the annular part 71 and a knurled part 75 is formed at a position near the cam surface 74. The adhesive is surely stuck by the knurled part 75, so that the cam surface 74 and the cam pin 80 are firmly fixed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an imaging apparatus that obtains an image signal by forming an image on an imaging element.

  2. Description of the Related Art In recent years, digital cameras that are rapidly spreading include an imaging lens, a lens holding frame that holds the imaging lens, and an image sensor such as a CCD image sensor or a CMOS image sensor that photoelectrically converts an image formed by the imaging lens. In recent years, not only a single digital camera but also mobile phones, PDAs (portable information terminals), and various electronic devices such as personal computers, It is assembled as an image pickup apparatus (image pickup unit) in which the image pickup lens, the lens holding frame, and the image pickup element as described above are unitized.

  In such an imaging apparatus, a single focal point is used as an imaging lens for the purpose of reducing the cost. Therefore, if the distance between the imaging element and the imaging lens is not incorporated at an appropriate position, a focused image is obtained. Can't get. Therefore, it is necessary to fix the lens holding frame after adjusting the focus of the imaging lens with respect to the imaging device during the assembly process. As such a focus adjustment means, there exists a thing described in patent document 1, for example. The focus adjustment means includes an adjustment plate that engages with the lens holding frame and is slidably supported with respect to the base of the lens barrel, and a fastening screw that fixes the adjustment plate to the base. Before tightening the fastening screw halfway and holding the adjustment plate, move the lens holding frame with the adjustment plate in the optical axis direction and adjust the focus, then screw in the fastening screw and fasten, The lens holding frame is fixed.

  Patent Document 1 describes a lens barrel having switching means for switching the position of a lens holding frame from a focal position during normal shooting to a focal position during close-up (macro) shooting. Focus is adjusted for both normal shooting and close-up shooting.

JP 2003-195139 A

  However, in the imaging apparatus provided with the focus adjusting means as described in the above-mentioned Patent Document 1, the fastening screw is fastened every time the focus adjustment is performed. The operation of fastening the fastening screw again must be done, which is very time consuming and increases the time of the assembly process. In addition, the number of components such as an adjusting plate and fastening screws increases, which hinders cost reduction of the imaging apparatus. Furthermore, like the lens barrel described in Patent Document 1, if a switching means for switching the position of the lens holding frame in normal shooting and close-up shooting is provided, the number of parts and the assembly process time will further increase. Cost increases.

  The present invention has been made in consideration of the above circumstances. The imaging lens, the lens holding frame, and the imaging device are integrated into a single unit, and the focus position can be switched between normal photography and close-up photography, and focus can be easily performed. An object of the present invention is to provide an imaging apparatus capable of performing adjustment work at low cost.

  The present invention provides an imaging lens, a lens holding frame for holding the imaging lens, a fixed cylinder for slidably holding the lens holding frame, an image fixed by the fixed cylinder and imaged by the imaging lens. An image sensor that obtains an image signal through photoelectric conversion, a macro switching unit that switches a focal position of the imaging lens with respect to the image sensor during normal shooting and close-up shooting, and a position of the imaging lens with respect to the image sensor. The macro switching unit is attached to the fixed cylinder, moves between a normal position and a protruding position, and moves from the normal position to the focus position adjusting unit that adjusts the focal position. A macro switching cam ring that moves the lens holding frame at the normal imaging position to the close imaging position by moving the lens holding frame at the normal imaging position in the optical axis direction when moving to the projecting position, and the macro switching cam And a biasing member that returns the lens holding frame to the normal imaging position when the lens ring moves from the protruding position to the normal position. The focal position adjusting means is attached to the fixed cylinder and is in the optical axis direction. The macro switching cam ring and the focus adjusting cam ring are in contact with each other and arranged side by side in the optical axis direction. An imaging device characterized by comprising:

  In the present invention, each of the macro switching cam ring and the focus adjusting cam ring has a cam surface formed on a surface opposite to a surface in contact with each other, and one of these cam surfaces is It is preferable that the cam pin formed on the lens holding frame and the other are in sliding contact with the cam pin formed on the fixed cylinder and moved in the optical axis direction by inputting rotation.

  Furthermore, the present invention provides an imaging lens, a lens holding frame for holding the imaging lens, a fixed cylinder for slidably holding the lens holding frame, and an image formed by the imaging lens fixed to the fixed cylinder. In the imaging apparatus, comprising: an imaging element that photoelectrically converts the captured image to obtain an image signal; and a focal position adjusting unit that adjusts a focal position by adjusting a position of the imaging lens with respect to the imaging element; Has a cam surface that is attached to the fixed cylinder and is slidably contacted with a cam pin formed on the fixed cylinder or the lens holding frame. When the rotation is input and moves in the optical axis direction, the lens holding The focus adjustment cam ring presses the frame, and the focus adjustment cam ring has a plurality of concave and convex portions formed on an outer peripheral surface located in the vicinity of the cam surface.The focus adjusting cam ring is in contact with each other and is mounted on the fixed cylinder side by side in the optical axis direction, and moves between a normal position and a protruding position, and moves from the normal position to the protruding position. A macro switching cam ring that moves the lens holding frame at the normal imaging position to the close imaging position by pressing in the optical axis direction, and the macro switching cam ring has moved from the protruding position to the normal position. Macro switching means comprising a biasing member for returning the lens holding frame to the normal imaging position is sometimes provided, and the macro switching cam ring is positioned with respect to the uneven portion. It is preferable that a protruding portion for adhesive flow prevention protruding in a direction substantially orthogonal to the optical axis from the outer peripheral surface on the side is integrally formed.

  In the imaging apparatus of the present invention, the macro switching cam ring and the focus adjustment cam ring are arranged in contact with each other and aligned in the optical axis direction, so that the focus position can be switched between normal shooting and close-up shooting. Since the focus adjustment operation can be performed reliably and easily, and the number of components is small, the cost of the imaging apparatus can be reduced.

  In addition, since a plurality of irregularities are formed on the outer peripheral surface of the focus adjustment cam ring in the vicinity of the cam surface, the focus adjustment cam ring can be securely fixed with a small amount of adhesive. Therefore, the work process can be shortened, the weight of the imaging device can be reduced, and the cost can be reduced.

  In addition, an adhesive flow stop protrusion is integrally formed that protrudes in a direction substantially perpendicular to the optical axis from the outer peripheral surface on the side where the macro switching cam ring is located with respect to the uneven portion of the focus adjustment cam ring. Therefore, it is possible to prevent the adhesive from flowing into a position other than the predetermined position, and to prevent malfunction of the imaging apparatus.

  Hereinafter, preferred embodiments of an imaging apparatus according to the present invention will be described in detail with reference to the drawings. 1 and 2 are external perspective views of the front side and the back side of a camera-equipped mobile phone to which the present invention is applied. The main body 2 of the camera-equipped mobile phone 1 includes an upper housing 11 and a lower housing 12 and a hinge portion 13 that rotatably connects the housings 11 and 12.

  As shown in FIG. 2, the upper housing 11 is provided with an imaging device 21 in which the present invention is implemented, and the camera-equipped mobile phone 1 acquires a subject image from the imaging device 21. The hinge portion 13 is provided with a click mechanism (not shown) so that the upper housing 11 and the lower housing 12 are locked at a predetermined angle when the camera-equipped mobile phone 1 is used. The main body 2 can be unfolded and folded by rotating the main housing 2 via the hinge 13 so that the upper housing can be folded when the camera-equipped mobile phone 1 is not used. 11 and the lower housing 12 are folded so as to be parallel to each other.

  Both the casings 11 and 12 are formed in a substantially rectangular thin plate shape. The imaging device 21 is exposed from the back surface 11a of the upper casing 11, and the LCD panel 26 and the reception speaker 27 are displayed on the front surface 11b. Is provided with an antenna 28, a macro switch 29 is disposed on one side surface 11 d, and an operation unit 31 and a transmission microphone 32 are disposed on the front surface 12 a of the lower housing 12. Further, a lower surface 12b of the lower housing 12 is provided with a socket 34 for connecting a cable with an external device such as a personal computer, and a memory card slot 36 into which a memory card is loaded.

  The antenna 28 receives a radio signal from another mobile phone or an Internet server when using a telephone call, an e-mail service, or an Internet connection service, and transmits a radio signal transmitted from the camera-equipped mobile phone 1 to the outside. . The receiving speaker 27 outputs the voice or ringtone of the communication partner. On the LCD panel 26, various information such as a menu screen and a telephone number of the called party, a through image obtained by the image sensor 22 and an image recorded on the memory card are displayed. The transmitting microphone 32 converts the voice of the speaker into an electric voice signal and transmits it to the other party via the antenna 28.

  The operation unit 31 includes a selection key 31a, a shutter button 31b, a dial key 31c, and the like. The selection key 31a is used for selecting / setting various menus. The camera-equipped mobile phone 1 can select an imaging mode from various modes to capture an image of the subject, and the selection of these modes is performed by operating the selection key 31a. The selection key 31a is also used for an imaging operation of a subject by the imaging device 21. The shutter button 31b is used for a release operation when the imaging device 21 performs imaging. Furthermore, the dial key 31c is operated when inputting a telephone number or an e-mail text.

  As shown in FIGS. 3, 4, and 5, the imaging device 21 includes an imaging lens 40, a lens barrel 41, an imaging element 42, an infrared light cut filter 43, and a filter holding member 44. And in the unit state in which these are integrated, as shown in FIG. As the image sensor 42, a CCD or a CMOS is used. The imaging element 42 includes a light receiving element 46, a semiconductor substrate 47 on which the light receiving element 46 is mounted, a glass cover 48 that covers the surface of the light receiving element 46, and the like.

  As shown in FIG. 4, the imaging device 21 is fixed at a position facing the exposure hole 49 formed in the housing 11, and is fitted around the exposure hole 49 so as to protrude toward the imaging element 21. A joint boss 50 is formed. The fitting boss 50 is formed with a fitting recess 50a cut out in a columnar shape. Further, the exposure hole 49 is formed with a narrowed portion 49a having a small inner diameter, and a protective cover 51 is provided.

  The lens barrel 41 includes a lens holding frame 52 that holds the imaging lens 40, a macro switching cam ring 53, a focus adjustment cam ring 54, a fixed cylinder 55, and a coil spring 56. The lens holding frame 52 is a fixed cylinder. The macro switching cam ring 53 and the focus adjustment cam ring 54 are positioned so as to be positioned closest to the subject with respect to 55 and sandwiched between the lens holding frame 52 and the fixed cylinder 55.

  As shown in detail in FIG. 5, the lens holding frame 52 includes a cylindrical frame portion 57 that holds the imaging lens 40, a flange portion 58 that is formed so as to protrude from the outer peripheral surface of the frame portion 57, and It consists of locking claws 59 provided at a plurality of locations at the end of the flange portion 58. In addition, although the latching claw 59 is provided in two places in the figure, it is not restricted to this, You may provide three or more places so that the lens holding frame 52 can be latched stably. The frame portion 57 includes a front cylindrical portion 57 a closer to the subject than the flange portion 58 and a rear cylindrical portion 57 b closer to the image plane than the flange portion 58. In addition, a cam pin 60 that protrudes toward the image plane side is formed integrally with the flange portion 58. In FIG. 4, the imaging lens 40 includes three groups of lenses including the first group 40a, the second group 40b, and the third group 40c. However, the present invention is not limited to this.

  The macro switching cam ring 53 is formed integrally with an annular portion 61 and a knob portion 62 protruding from the outer peripheral surface of the annular portion 61. The annular portion 61 is formed with a notch 61b cut out in the axial direction from an end surface 61a facing the lens holding frame 52, and a cam surface 63 is formed at a part of the notch 61b. ing. The cam surface 63 is in sliding contact with the cam pin 60 of the lens holding frame 52.

  The cam surface 63 of the macro switching cam ring 53 is gradually inclined from the image plane side to the subject side so that the lens holding frame 52 moves between the normal imaging position and the macro (close-up) imaging position. It is formed to do. In the macro switching cam ring 53, the ring portion 61 rotates as the knob 62 moves in a direction substantially orthogonal to the optical axis L in conjunction with the slide operation of the macro switch 29. When the annular portion 61 rotates, the macro switching cam ring 53 moves straight along the optical axis L between the initial position and the protruding position according to the cam surface 63 and the lead of the cam pin 60. Thereby, the lens holding frame 52 is switched between the normal imaging position and the macro imaging position.

  The notches 61b and the cam surface 63 provided in the macro switching cam ring 53 are formed at three locations in the figure, and are arranged at rotationally symmetric positions about the imaging optical axis L at intervals of 120 degrees. The number of the notches 61b and the cam surface 63 is not limited to this as long as the macro switching cam ring 53 can move stably. The cam pins 60 that are in sliding contact with the cam surface 63 are also arranged according to the position and number of the cam surfaces 63.

  As shown in detail in FIGS. 6 and 7, the focus adjustment cam ring 54 is formed integrally with an annular portion 71, a knob portion 72, and an adhesive flow stop projection 73. The annular portion 71 is formed with a cutout portion 71b cut out in the axial direction from an end surface 71a facing the fixed cylinder 55, and a cam surface 74 is formed at a part of the cutout portion 71b. Yes. The knob portion 72 is formed so as to protrude from the outer peripheral surface of the annular portion 71, and is arranged at a position where the angular position is shifted from the cam surface 74. The notch 71b and the cam surface 74 provided in the focus adjustment cam ring 54 are formed at three places in the figure, similarly to the notch 61b and the cam surface 63 provided in the macro switching cam ring 53. However, the present invention is not limited to this as long as the focus adjustment cam ring 54 can move stably.

  Further, a knurl (uneven portion) 75 is formed at a position near the cam surface 74 on the outer peripheral surface 71 c of the annular portion 71, and a position adjacent to the knurl 75 on the subject side in the optical axis direction. Further, an adhesive flow stopping projection 73 is disposed. The knurl 75 includes a plurality of line-shaped recesses 75 a formed between the flow preventing projection 73 and the cam surface 74 so as to have an angle range substantially the same as the range where the cam surface 74 is formed. . Note that the angle range D (see FIG. 6) in which the knurls 75 are formed is set, for example, within 25 °. The recesses 75a are streaks along the imaging optical axis L, and are formed at positions that are parallel to each other and equally spaced. In the drawing, the knurl 75 is formed of five concave portions 75a, but the number is not limited to this. The adhesive flow stopping protrusion 73 is formed so as to protrude from the outer peripheral surface 71 c along the subject-side end surface 71 d of the annular portion 71 within the same angular range as the cam surface 74.

  The fixed cylinder 55 includes a cylindrical portion 76, a base portion 77 formed integrally with the lower surface of the cylindrical portion 76, and a protruding piece 78 that protrudes upward from the base portion 77. The cylindrical portion 76 is formed in a cylindrical shape centering on the imaging optical axis L of the imaging lens 40, and the macro switching cam ring 53 and the focus adjustment cam ring 54 are formed on the inner peripheral surface 76b on the outer peripheral surface 76a. The lens holding frames 52 are fitted so as to be rotatable and slidable in the optical axis direction. The base portion 77 has a rectangular plate shape, and the filter holding member 44 and the image sensor 42 are fixed to the back side.

  An opening 79 is formed in the lower surface 77 a of the base portion 77, and the image sensor 42 is fixed at a position facing the opening 79. The protruding pieces 78 are formed in the vicinity of the four corners of the base portion 77, respectively.

  Further, the base portion 77 includes a cam pin 80 that matches the position and number of the cam surface 74 of the focus adjusting cam ring 54 and a locking claw 81 that matches the position of the locking claw 59 of the lens holding frame 52. Are integrally formed.

  When the focus adjustment cam ring 54 is fitted to the cylindrical portion 76, the cam surface 74 is in sliding contact with the cam pin 80, and the subject-side end surface 71 d of the annular portion 71 is in the macro switching cam ring 53. Abut. The cam surface 74 is formed so as to be gradually inclined from the image surface side toward the subject side so that the lens holding frame 52 moves in the optical axis direction. In the initial position, the cam surface 74 is an end surface of the annular portion 71. 71a is in an initial position where it abuts against the base portion 77, and the end surface 71a of the annular portion 71 moves to a protruding position away from the base portion 77 according to the inclination of the cam surface 74 from this initial position. The focus adjustment cam ring 54 rotates the annular portion 71 when the knob 72 moves in a direction substantially orthogonal to the optical axis L. When the annular portion 71 rotates, the focus adjustment cam ring 54 moves along the optical axis L between the initial position and the protruding position according to the cam surface 74 and the lead of the cam pin 80.

  One end 56 a of the coil spring 56 is locked to the locking claw 81, and the other end 56 b is locked to the locking claw 59 of the lens holding frame 52. Thus, the lens holding frame 52 is held with respect to the fixed cylinder 55 in a state in which the lens holding frame 52 is slidable with a predetermined stroke in the optical axis direction. As described above, the macro switching cam ring 53 is in contact with the flange portion 58 of the lens holding frame 52. When the macro switching cam ring 53 moves along the optical axis L from the initial position to the protruding position, the lens is changed. The holding frame 52 also moves together to switch from the normal imaging position to the macro imaging position. When the macro switching cam ring 53 returns from the protruding position to the initial position, the lens holding frame 52 also moves to the image plane side by the bias of the coil spring 56 and returns to the normal imaging position.

  The infrared light cut filter 43 is formed by coating a transparent glass substrate with a multilayer film that transmits visible light and blocks infrared light. The filter holding member 44 is formed in a substantially rectangular shape, and pressing portions 44 a and 44 b that protrude toward the infrared light cut filter 43 are integrally formed. The pressing portions 44 a and 44 b hold the infrared light cut filter 43 by pressing the infrared light cut filter 43 toward the fixed cylinder 55 by its elastic force. The filter holding member 44 that holds the infrared light cut filter 43 is fitted into the opening 79 of the fixed cylinder 55 and is sandwiched and fixed between the fixed cylinder 55 and the image sensor 42. In fixing the fixing cylinder 55 and the image sensor 42, the fixing cylinder 55 and the image pickup element 42 are fixed by applying an adhesive. In addition, as a kind of adhesive agent, an ultraviolet curing type thing is used, for example.

  The imaging device 21 configured as described above and unitized is incorporated into the housing 11 after the focus adjustment of the imaging lens 40 with respect to the imaging element 42 is performed. The focus adjustment method will be described below. When performing the focus adjustment, first, a test circuit is connected to the image sensor 42 and a test chart for focus adjustment is arranged on the imaging optical axis L, and the test chart exposed on the imaging surface of the image sensor 42 is exposed. Read the resolution from the image. When the prescribed resolution is not obtained, the operator adjusts the focus adjustment cam ring 54 by a predetermined rotation amount by moving the knob 72 with a finger or a robot arm. When the focus adjustment cam ring 54 is rotated by a predetermined amount, it moves little by little in the optical axis direction, so that the lens holding frame 52 that is pressed by the movement of the focus adjustment cam ring 54 also moves integrally in the optical axis direction. To do. Thereby, since the relative position of the imaging lens 40 with respect to the imaging element 42 changes, the image of the test chart is captured again in this state, and the resolution is read. If the prescribed resolution cannot be obtained, the focus adjustment cam ring 54 is rotated by a predetermined amount and the test chart is imaged repeatedly. If the prescribed resolution is obtained, the focus adjustment is finished. In this way, it is possible to easily perform the focus adjustment work simply by rotating the focus adjustment cam ring 54, and the time for the work process can be shortened.

  The fixing process of the focus adjustment cam ring 54 is performed on the imaging device 21 for which the focus adjustment has been completed. The imaging device 21 is set so that the position of the focus adjustment cam ring 54 does not shift in a state where the focus adjustment is performed as described above, and an adhesive 85 is applied between the cam surface 74 and the cam pin 80. . At this time, since the knurled 75 is formed in the vicinity of the cam surface 74, the surface area to which the adhesive 85 is applied is widened. 54 can be securely fixed. Further, since the adhesive flow stop protrusion 73 is formed in the vicinity of the knurl 75, the adhesive 85 can be prevented from flowing out toward the macro adjustment cam ring 53 and the lens holding frame 52.

  As described above, it is possible to easily switch between normal imaging and macro imaging and to perform focus adjustment with a simple configuration, and further, between the cam surface 74 and the cam pin 80 in the focus adjustment work. The knurled 75 is formed so that the adhesive 85 adheres securely, and the focus adjusting cam ring 54 can be firmly fixed to the fixed cylinder 55. As a result, it is possible to securely fix the focus adjusting cam ring 54 by using a smaller amount of the adhesive 85, thereby shortening the work process, reducing the weight of the imaging device, and This is very effective in reducing costs. Further, by providing the adhesive flow stop protrusion 73 in the vicinity of the knurl 75, it is possible to prevent the adhesive 85 from flowing out, so that the adhesive 85 can be used for the macro adjustment cam ring 53 and the lens holding frame 52. It is possible to prevent them from adhering to and sticking to each other, and to prevent malfunction of the imaging device 21.

In the above embodiment, the parallel line-shaped knurls 75 are formed as the plurality of concave and convex portions formed in the vicinity of the cam surface 74 of the focus adjustment cam ring 54. However, the present invention is not limited to this. As long as the outer peripheral surface of the annular portion 71 of the cam ring 54 is formed to be uneven, it may have another shape, for example, a mesh-like knurl or a satin finish.

  In the above embodiment, the camera-equipped mobile phone is described as an example. However, the present invention is not limited to this and may be applied to a mobile phone, a PDA, a personal computer, or the like.

  In the above-described embodiment, the focus adjustment cam ring 54 is held at a position where the focus adjustment cam ring 54 is sandwiched between the macro switching cam ring 53 and the fixed cylinder 55. It may be arranged on the subject side of the macro switching cam ring 53, that is, sandwiched between the lens holding frame 52 and the macro switching cam ring 53. Furthermore, in this case, the cam pin formed integrally with the lens holding frame 52 is brought into sliding contact with the cam surface of the focus adjustment cam ring 54, and the focus adjustment cam ring 54 is rotated through these cam pins and the cam surface. Since the lens holding frame 52 can be moved in the optical axis direction, the same effect as in the above embodiment can be obtained. The present invention is not limited to this, and the macro switching cam ring may be omitted.

It is a front side perspective view which shows the mobile phone with a camera to which this invention is applied. It is a back side perspective view of a mobile phone with a camera. It is a perspective view which shows an imaging device. It is principal part sectional drawing of the mobile phone with a camera. It is a disassembled perspective view which shows the structure of an imaging device. It is a perspective view of a cam ring for focus adjustment. It is a front view of a cam ring for focus adjustment. It is explanatory drawing which shows the process of focus adjustment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone with a camera 2 Main body part 11,12 Case 13 Hinge part 21 Imaging device 40 Imaging lens 41 Lens barrel 52 Lens holding frame 54 Focus adjustment cam ring 55 Fixed cylinder 73 Adhesive flow prevention protrusion part 75 Knurl

Claims (4)

An imaging lens, a lens holding frame that holds the imaging lens, a fixed cylinder that slidably holds the lens holding frame, and an image formed by the imaging lens that is fixed to the fixed cylinder by photoelectric conversion. An image pickup device that obtains an image signal, a macro switching unit that switches a focal position of the imaging lens with respect to the image pickup device during normal shooting and close-up shooting, and a focal position by adjusting a position of the imaging lens with respect to the image pickup device In an imaging apparatus provided with a focal position adjusting means for adjusting,
The macro switching means is attached to the fixed cylinder, moves between a normal position and a protruding position, and lightes the lens holding frame at the normal imaging position when moving from the normal position to the protruding position. A macro switching cam ring that is pressed in the axial direction to move to the close imaging position, and the lens holding frame is returned to the normal imaging position when the macro switching cam ring moves from the protruding position to the normal position. The focus position adjusting means is a focus adjustment cam ring that is attached to the fixed cylinder and moves in the optical axis direction to press the lens holding frame, and the macro switching cam ring. And the focus adjusting cam ring are in contact with each other and arranged side by side in the optical axis direction.   The macro switching cam ring and the focus adjusting cam ring each have a cam surface formed on a surface opposite to a surface that contacts each other, and one of the cam surfaces is formed on the lens holding frame. 2. The imaging apparatus according to claim 1, wherein the formed cam pin and the other are in sliding contact with the cam pin formed on the fixed cylinder, and move in the optical axis direction by inputting rotation. An imaging lens, a lens holding frame that holds the imaging lens, a fixed cylinder that slidably holds the lens holding frame, and an image formed by the imaging lens that is fixed to the fixed cylinder by photoelectric conversion. In an imaging apparatus comprising: an imaging element that obtains an image signal; and a focal position adjusting unit that adjusts a focal position by adjusting a position of the imaging lens with respect to the imaging element.
The focal position adjusting means is attached to the fixed cylinder, has a cam surface that is slidably contacted with a cam pin formed on the fixed cylinder or the lens holding frame, and moves in the optical axis direction when rotation is input. The focus adjustment cam ring presses the lens holding frame, and the focus adjustment cam ring has a plurality of concave and convex portions formed on an outer peripheral surface located in the vicinity of the cam surface. The imaging device according to claim 2.   When the focus adjusting cam ring is in contact with each other and mounted on the fixed cylinder side by side in the optical axis direction, and moves between a normal position and a protruding position, and moves from the normal position to the protruding position. A macro switching cam ring for pressing the lens holding frame at the normal imaging position in the optical axis direction and moving the lens holding frame to the close imaging position, and when the macro switching cam ring is moved from the protruding position to the normal position. Macro switching means comprising an urging member for returning the lens holding frame to the normal imaging position, and the focus adjustment cam ring is located on the side where the macro switching cam ring is located with respect to the concave and convex portions. 4. The image pickup apparatus according to claim 3, wherein an adhesive flow stopping protrusion protruding from the outer peripheral surface in a direction substantially orthogonal to the optical axis is integrally formed.

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