JP6444765B2 - Imaging apparatus and endoscope - Google Patents

Description

  The present invention relates to an imaging apparatus and an endoscope that change an optical function by moving a moving frame having an optical system inside back and forth by a magnetic force.

  2. Description of the Related Art An imaging apparatus capable of switching optical performance by moving a moving frame having an optical system therein in the front-rear direction in the optical axis direction of the optical system is well known. This imaging apparatus is provided in a camera, a communication terminal with a camera, a medical device, and the like.

  In such a conventional imaging device, in order to reduce size, weight, cost, reliability, and suppress generation of sound, for example, as disclosed in Patent Document 1, lens driving is performed by a magnetic action. One having a lens driving device to perform is known.

JP 2005-227705 A

  However, in the imaging apparatus having the lens driving device of Patent Document 1, there is no means for adjusting the focus position at the time of assembly, and assembly accuracy such as a frame and a magnet and parts processing accuracy are required, and focus adjustment at the time of assembly is extremely necessary. There was a problem that was difficult.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an imaging apparatus and an endoscope that can easily adjust the focus position during assembly.

In order to achieve the above object, an imaging apparatus according to an aspect of the present invention includes an optical system that focuses light of an optical image of a subject, an imaging element that converts the optical image into a video signal, and a holding frame that holds the optical system. A movable frame that is included in the holding frame so as to be movable along the imaging optical axis of the optical image and is formed of a magnetic member that holds at least one of the optical systems, and is provided on the outer periphery of the holding frame. The magnet is provided with two yokes provided apart from each other in the optical axis direction, and a coil provided between the yokes, and the moving frame is magnetically applied to the imaging element by the optical system. A first stop position at which the optical image is focused and a drive mechanism for moving the optical image to the second stop position, and a position regulation adjustment groove having a predetermined length along the imaging optical axis is formed in the holding frame And at least the two Provided one of the yokes, through the position regulating adjusting groove comprises a movement position defining member for restricting the movement of the moving frame is inserted into the holding frame.

In order to achieve the above object, an endoscope according to one embodiment of the present invention includes an optical system that focuses light of an optical image of a subject, an image sensor that converts the optical image into a video signal, and a holder that holds the optical system. A frame, a moving frame included in the holding frame so as to be movable along the imaging optical axis of the optical image, and formed from a magnetic member that holds at least one of the optical systems, and provided on an outer periphery of the holding frame A magnet provided with two yokes provided apart from each other in the optical axis direction, and a coil provided between the yokes, and the moving frame is applied to the imaging device by the optical system by a magnetic force. A first stop position at which the optical image is focused and a drive mechanism for moving the optical image to a second stop position, and a position regulation adjustment groove having a predetermined length along the imaging optical axis is provided in the holding frame. Formed and at least the two An imaging device provided with a moving position defining member that is inserted into the holding frame and regulates the movement of the moving frame via the position regulation adjusting groove, and the imaging device is provided. And an inserted portion.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device and endoscope which can adjust a focus position easily at the time of an assembly can be provided.

The figure which shows the external appearance of the endoscope which comprises the imaging device of 1 aspect of this invention Sectional drawing which shows schematically the imaging device provided in the front-end | tip part of the insertion part of an endoscope similarly Sectional drawing of the imaging device which follows the III-III line in FIG. Sectional drawing which shows schematically the imaging device in the stop position where the movement lens unit was restricted from moving backward Sectional drawing which shows schematically the imaging device provided in the front-end | tip part of the insertion part of the endoscope of the 1st modification similarly Sectional drawing which shows schematically the imaging device provided in the front-end | tip part of the insertion part of the endoscope of the 2nd modification as same as the above Sectional drawing which shows schematically the imaging device provided in the front-end | tip part of the insertion part of the endoscope of the 3rd modification similarly Sectional drawing of the imaging device which follows the VIII-VIII line in FIG. Sectional drawing which shows schematically the imaging device provided in the front-end | tip part of the insertion part of the endoscope of a 4th modification as well. FIG. 9 is a cross-sectional view of the imaging device along the line XX in FIG. Sectional drawing of the imaging device of a 5th modification same as the above Sectional drawing of the imaging device of a 6th modification same as the above

  Here, an endoscope provided with an imaging apparatus according to the present invention will be described as an example. In the following description, the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.

  In addition, an endoscope having an imaging device in the following configuration description will be described by taking a so-called flexible mirror having an insertion portion as flexible for insertion into an upper or lower digestive organ of a living body. Without being limited thereto, the technique can be applied to a so-called rigid endoscope having a hard insertion portion used for surgery.

  Furthermore, the imaging apparatus is not limited to those provided in medical devices such as endoscopes, and can be employed in, for example, camera-equipped mobile phones.

Hereinafter, an imaging device and an endoscope of one embodiment of the present invention will be described with reference to the drawings.
1 is a diagram illustrating an appearance of an endoscope including an imaging device, FIG. 2 is a cross-sectional view schematically illustrating an imaging device provided in a distal end portion of an insertion portion of the endoscope, and FIG. 3 is a diagram illustrating FIG. 4 is a cross-sectional view of the image pickup apparatus taken along line III-III, FIG. 4 is a cross-sectional view schematically showing the image pickup apparatus in a stop position where the movement of the moving lens unit is restricted, and FIG. 5 is a first modification. FIG. 6 is a cross-sectional view schematically showing an imaging device provided in the distal end portion of the insertion portion of the endoscope. FIG. 6 schematically shows the imaging device provided in the distal end portion of the insertion portion of the endoscope according to the second modification. FIG. 7 is a sectional view schematically showing an imaging device provided in the distal end portion of the insertion portion of the endoscope of the third modification, and FIG. 8 is an imaging device along the line VIII-VIII in FIG. FIG. 9 schematically shows an imaging device provided in the distal end portion of the insertion portion of the endoscope according to the fourth modification. FIG. 10 is a cross-sectional view of the image pickup apparatus taken along line XX in FIG. 9, FIG. 11 is a cross-sectional view of the image pickup apparatus of the fifth modification, and FIG. 12 is a cross-section of the image pickup apparatus of the sixth modification. FIG.

First, with reference to FIG. 1, an example of a configuration of an endoscope 101 including an imaging device 1 according to the present invention will be described.
The endoscope 101 of this embodiment has a configuration that can be introduced into a subject such as a human body and optically images a predetermined observation site in the subject.

  The subject into which the endoscope 101 is introduced is not limited to a human body, and may be another living body or an artificial object such as a machine or a building.

  The endoscope 101 includes an insertion portion 102 introduced into the subject, an operation portion 103 located at the proximal end of the insertion portion 102, and a universal cord 104 extending from a side portion of the operation portion 103. It is mainly composed.

  The insertion portion 102 includes a distal end portion 110 disposed at the distal end, a bendable bending portion 109 disposed on the proximal end side of the distal end portion 110, and an operation portion 103 disposed on the proximal end side of the bending portion 109. A flexible tube portion 108 having flexibility is connected to the tip end side of the tube.

  As will be described in detail later, the imaging device 1 is provided at the distal end portion 110. In addition, the operation unit 103 is provided with an angle operation knob 106 for operating the bending of the bending unit 109.

  An endoscope connector 105 connected to the external device 120 is provided at the proximal end portion of the universal cord 104. The external device 120 to which the endoscope connector 105 is connected is connected to an image display unit 121 such as a monitor via a cable.

  The endoscope 101 includes an optical fiber that transmits illumination light from a universal cable 104, an operation unit 103, a composite cable 115 (not shown) inserted into the insertion unit 102, and a light source unit provided in the external device 120. It has a bundle (not shown).

  The composite cable 115 is configured to electrically connect the endoscope connector 105 and the imaging device 1. By connecting the endoscope connector 105 to the external device 120, the imaging device 1 is electrically connected to the external device 120 through the composite cable 115.

  Via this composite cable 115, power is supplied from the external device 120 to the imaging device 1 and communication between the external device 120 and the imaging device 1 is performed.

  The external device 120 is provided with an image processing unit. The image processing unit generates a video signal based on the image sensor output signal output from the imaging device 1 and outputs the video signal to the image display unit 121. That is, in the present embodiment, an optical image (endoscopic image) captured by the imaging device 1 is displayed on the image display unit 121 as a video.

  Note that the endoscope 101 is not limited to the configuration connected to the external device 120 or the image display unit 121, and may be configured to include a part or all of the image processing unit or the monitor, for example.

  The optical fiber bundle is configured to transmit the light emitted from the light source unit of the external device 120 to the illumination window as the illumination light emitting unit of the distal end portion 110. Further, the light source unit may be arranged on the operation unit 103 or the distal end portion 110 of the endoscope 101.

Next, the configuration of the imaging device 1 of the present embodiment will be described in detail below.
As illustrated in FIG. 2, the imaging device 1 includes a fixed lens unit 10, a moving lens unit 20, an actuator 30 that is a driving mechanism, and an imaging element 40.

  The image sensor 40 is an image sensor such as a CCD or a CMOS, and is fixed to an image sensor holding frame (not shown). The image sensor holding frame is connected to the rear of the fixed lens unit 10.

  The fixed lens unit 10 is an objective lens that is an optical system that focuses light of a subject image (optical image) toward the image sensor 40, and a lens holding frame that is formed from a nonmagnetic member. It has a substantially cylindrical fixed lens frame 12 as a holding frame and an annular regulating member 13.

  The fixed lens frame 12 is formed in an elongated cylindrical shape along the imaging optical axis O, and holds the fixed lens 11 provided with an optical aperture 14 as an imaging optical member at the tip of the imaging optical axis O. ing. The fixed lens 11 may be composed of a plurality of lens groups.

  A regulating member 13 is fixed to the inner periphery of the fixed lens frame 12 so that the optical diaphragm 14 is sandwiched behind the fixed lens 11.

  In addition, a plurality of, in this case, three focus adjustment grooves 15 serving as position regulation adjustment grooves are formed behind the fixed lens frame 12. The focus adjustment groove 15 will be described in detail later together with a configuration of a restriction pin 37 as a movement position defining member described later provided in the actuator 30.

  The moving lens unit 20 includes a substantially cylindrical moving lens frame 21 formed of a magnetic member, and a moving lens 22 that is an optical system that focuses the light of the subject image on the light receiving portion of the image sensor 40. .

  The moving lens frame 21 has outward flanges 23 and 24 formed in the front and rear, and holds the moving lens 22 inside. The moving lens 22 may be composed of a plurality of lens groups.

  The moving lens unit 20 is included in the fixed lens frame 12 of the fixed lens unit 10 and is provided so as to be movable in the front-rear direction along the imaging optical axis O.

  The actuator 30 includes a first yoke 31 provided at the front, a second yoke 32 provided at the rear, a first magnet 33 fixed integrally to the front end portion of the first yoke 31, and a second Between the first magnet 31 and the second yoke 32, and a coil 35 wound around the outer periphery of the fixed lens frame 12 between the first magnet 31 and the second yoke 32. And have.

  The first yoke 31 and the second yoke 32 have a substantially cylindrical shape and are fixed to the fixed lens frame 12. The first yoke 31 and the second yoke 32 are magnetic members such as soft iron for amplifying the magnetic force generated in the first magnet 33, the second magnet 34 and the coil 35.

  In the actuator 30 here, the first magnet 33 has the S pole magnetized on the front side, the N pole magnetized on the rear side, and the second magnet 34 has the N pole on the front side. It is a permanent magnet that is magnetized and has a south pole magnetized on the rear side. That is, the first magnet 33 and the second magnet 34 are arranged so that the same magnetic poles (here, N poles) face each other.

  The actuator 30 configured as described above switches the energization direction to the coil 35 with respect to the magnetic fields of the first magnet 33 and the second magnet 34.

  As a result, the direction of the magnetic field generated in the coil 35 is changed in the actuator 30, and the first magnet 33 and the second magnet 34 that attract the moving lens unit 20 having the moving lens frame 21 formed of a magnetic member are relative to each other. The moving lens unit 20 is moved back and forth by changing the magnitude of the magnetic force.

  That is, the actuator 30 generates a magnetic field opposite to the magnetic field of the first magnet 33, thereby canceling the attractive force between the first magnet 33 and the moving lens unit 20. The magnet 35 is attracted by the magnetic force of the magnet 34 and moved backward, and the coil 35 generates a magnetic field opposite to the magnetic field of the second magnet 34, thereby canceling the attractive force between the second magnet 34 and the moving lens unit 20. The moving lens unit 20 is an electromagnetic actuator that is attracted by the magnetic force of the first magnet 33 and moves forward.

  As shown in FIG. 3, a plurality of holes 36 are formed in the second yoke 32 provided on the rear side toward the center, and three holes are formed here, and each of the three holes 36 is provided. A restricting pin 37, which is a moving position defining member and is a rod formed of a magnetic material, is fixedly inserted and fixed.

  These three restricting pins 37 are inserted into the fixed lens frame 21 through the above-described three focus adjustment grooves 15 formed in the fixed lens frame 12 and extend to the sliding portion of the moving lens frame 21. Thus, it is attached to the hole 36 of the second yoke 32.

  The three focus adjustment grooves 15 are long holes having a predetermined length in the direction along the imaging optical axis O.

  In the imaging apparatus 1 configured as described above, as shown in FIG. 2, the moving lens unit 20 moves forward, and the front end face of the outward flange 23 on the front side of the moving lens frame 21 is the restriction member 13. By abutting on the rear end face, the moving position of the moving lens unit 20 in front is restricted and stopped, and the moving lens unit 20 moves backward as shown in FIG. When the rear end surface of the flange 23 comes into contact with the three restriction pins 37, the movement position behind the movable lens unit 20 is restricted and stopped.

  In the imaging apparatus 1, the energization of the coil 35 of the actuator 30 is stopped after the movable lens unit 20 moves back and forth and comes into contact with the regulating member 13 or the three regulating pins 37. In this state, the moving lens unit 20 is held so as not to move by the magnetic force of the first magnet 33 when moving forward against an external impact, and is moved when moving backward. The magnet 34 is held so as not to move by the magnetic force of the second magnet 34.

  In the state where the moving lens unit 20 is moved rearward, the distance between the second magnet 34 and the moving lens frame 21 is longer than the distance from the first magnet 33 in the state where the moving lens unit 20 is moved forward. The holding force due to the magnetic force of the second magnet 34 is smaller than the holding force due to the magnetic force of the first magnet 33.

  However, in the moving lens unit 20, three restriction pins 37, which are rods made of a magnetic material, are in direct contact with the moving lens frame 21, and in addition to the magnetic force of the second magnet 34, The three restricting pins 37 magnetized by the magnetic force are held so as not to move by the magnetic force.

  The restriction pins 37 are not limited to three, and may be one, two, or three or more as long as the rearward movement of the movable lens unit 20 can be stopped and held so as not to move.

  Moreover, in the imaging device 1 here, the state in which the moving lens unit 20 moves forward and stops in front is the wide end that is the first stop position, and the moving lens unit 20 moves backward and stops in the rear. The tele end is the second stop position.

  As described above, the image pickup apparatus 1 is configured to move the moving lens unit 20 back and forth by driving the actuator 30 to switch between the wide and telephoto optical characteristics.

  Further, the imaging apparatus 1 may reverse the two optical characteristics of wide and tele depending on the stop positions before and after the moving lens unit 20 by the lens design of the fixed lens 11 and the moving lens 22.

  The image pickup apparatus 1 described above performs focus adjustment (focus position adjustment) of the subject image with respect to the image pickup device 40 at the front stop position where the movable lens unit 20 which is wide here contacts the restriction member 13 during assembly. Then, the fixed lens unit 10 and the image sensor 40 are fixed.

  Next, the actuator 30 is assembled to the fixed lens unit 10. At this time, first, the first yoke 31 and the coil 35 provided with the first magnet 33 are fixed to the outer peripheral portion of the fixed lens unit 10 by an adhesive, brazing, or the like.

  In this case, at the rear stop position where the moving lens unit 20 serving as a telescope comes into contact with the three restriction pins 37, the second magnet 34 is provided by adjusting the focus of the subject image with respect to the image sensor 40. The yoke 32 is fixed to the outer periphery of the fixed lens unit 10 by a fixing member such as an adhesive, brazing, or SUS solder.

  Specifically, after the second yoke 32 is externally inserted into the fixed lens frame 12, the three restriction pins 37 are inserted and fixed in the three holes 36.

  At this time, the three restriction pins 37 are inserted into the three focus adjustment grooves 15 formed in the fixed lens frame 12, respectively.

  The second yoke 32 is positioned on the imaging optical axis O of the focus adjustment groove 15 so that the rear stop position where the movable lens unit 20 abuts on the three restriction pins 37 is focused on the subject image with respect to the imaging element 40. The front and rear positions are finely adjusted within a predetermined length range along the fixed length, and fixed to the outer peripheral portion of the fixed lens unit 10 by a fixing member such as an adhesive, brazing, or SUS solder.

  As described above, the imaging apparatus 1 performs the focus adjustment of the movement restriction position of the moving lens unit 20 on the front side that is the wide end by fixing when the fixed lens unit 10 and the imaging element 40 are assembled, and the rear side that is the tele end. The movement regulating position of the movable lens unit 20 can be adjusted only by moving the second yoke 32 back and forth.

  For this reason, the imaging apparatus 1 of the present embodiment increases the tolerance of assembly accuracy and processing accuracy of various components constituting the fixed lens unit 10, the movable lens unit 20, and the actuator 30, and facilitates focus adjustment during assembly. Can be done.

(First modification)
As shown in FIG. 5, the imaging apparatus 1 of the present modification is provided with three restriction pins 37 on the first yoke 31, and the movement of the moving lens unit 20 on the front side is restricted by the three restriction pins 37. The restriction member 13 may be provided on the rear side of the fixed lens frame 12 so that the movement of the movable lens unit 20 on the rear side is restricted by the restriction member 13.

  In the imaging apparatus 1 of the present modification, when adjusting the focus by the three restriction pins 37, the wiring for energizing the coil 35 extends to the rear side, so there is no need to worry about the wiring. Assembling of the actuator 30 becomes easy.

(Second modification)
As shown in FIG. 6, the imaging device 1 according to the present modification includes three restriction pins 37 on the first yoke 31 in addition to the second yoke 32, so that the moving lens unit 20 moves forward. Alternatively, the configuration may be such that it is restricted by three restriction pins 37.

(Third Modification)
As shown in FIGS. 7 and 8, the imaging device 1 of the present modification example has a holding pin 38 that is a rod inserted and fixed in each of the holes 36 of the second yoke 32 provided on the rear side, A restriction ring 39 formed of a magnetic material as a moving position defining member that is connected and fixed to the three holding pins 38 and held in the fixed lens frame 12 may be provided.

  In the imaging device 1 of this modification, the movable lens unit 20 can be reliably stopped at the rear restriction position by the restriction ring 39 as compared with the restriction pin 37.

  The restriction ring 39 may be provided on the first yoke 31 so as to restrict the movement of the moving lens unit 20 on the front side as in the first and second modifications.

(Fourth modification)
As shown in FIGS. 9 and 10, the imaging apparatus 1 according to the present modification forms a total of four hole portions 36, which are a pair of two upper and lower portions divided into left and right sides of the second yoke 32 provided on the rear side. , A total of four position restriction adjusting grooves 16 each having two upper and lower two rods 41 formed on the left and right sides of the fixed lens frame 12 as a pair. It is good also as a structure inserted and fixed so that the 2nd yoke 32 may be spanned through the upper and lower two which make a pair of them.

  The imaging device 1 of this modification can also reliably stop the movable lens unit 20 at the rear restriction position by the two restriction rods 41 as compared with the restriction pin 37.

  Note that the two restriction rod bodies 41 may also be provided on the first yoke 31 so as to restrict the movement of the moving lens unit 20 in the front side, as in the first and second modifications. .

(Fifth modification)
As shown in FIG. 11, the imaging device 1 according to the present modification forms two notches 17 on the left and right sides of the second yoke 32 provided on the rear side, and the two notches 17 are made of a magnetic material. The formed regulation plate 43 may be inserted and fixed so as to span the second yoke 32.

  The imaging device 1 of the present modification can also reliably stop the moving lens unit 20 at the rear restriction position by the two restriction plate bodies 43 as compared with the restriction pin 37.

  The two restricting plate bodies 43 may also be provided on the first yoke 31 so as to restrict the movement of the moving lens unit 20 on the front side, as in the first and second modifications. .

(Sixth Modification)
As shown in FIG. 12, the imaging apparatus 1 according to the present modification includes, for example, one restriction pin 37a or two restriction pins 37a among the three restriction pins 37a, 37b, and 37c provided on the second yoke 32. , 37b are made of a magnetic material, and the other restricting pins 37c (37b) are made of a non-magnetic material.

  With such a configuration, for example, when only one restriction pin 37a is formed of a magnetic material, the movable lens unit 20 is drawn in the direction of the arrow A in the figure on the restriction pin 37a side.

  For example, when the two restriction pins 37a and 37b are formed of a magnetic material, the movable lens unit 20 is pulled in the direction of the arrow B in the figure between the two restriction pins 37a and 37b.

  Therefore, the movable lens unit 20 is always in a state of being close to one of the radial directions at the stop position where the rearward movement is restricted by the three restriction pins 37a, 37b, and 37c.

  Thereby, the imaging device 1 of the present modification takes into account the weight of the moving lens 22 and the position of the center of gravity, and sets the positions of the three restriction pins 37a, 37b, 37c, etc. Optical performance can be improved without blurring.

  Furthermore, the imaging apparatus 1 has a configuration in which the three restriction pins 37a, 37b, and 37c of the present modification are also provided in the first yoke 31 that restricts the movement of the moving lens unit 20 in the front side. Even at times, the optical performance can be improved without the imaging optical axis O being blurred.

  The invention described in each of the above embodiments is not limited to those embodiments and modifications, and various modifications can be made without departing from the scope of the invention in the implementation stage. Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in each embodiment, the stated requirements can be deleted if the stated problem can be solved and the stated effect can be obtained. The structure thus constructed can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 ... Imaging device 10 ... Fixed lens unit 11 ... Fixed lens 12 ... Fixed lens frame 13 ... Restriction member 15 ... Focus adjustment groove 17 ... Notch part 20 ... Moving lens unit 21 ... Moving lens frame 22 ... Moving lenses 23, 24 ... Outward flange 30 ... Actuator 31 ... First yoke 32 ... Second yoke 33 ... First magnet 34 ... Second magnet 35 ... Coil 36 ... Holes 37, 37a, 37b, 37c ... Restriction pin 38 ... Holding pin 39 ... Restriction ring 40 ... Image sensor 41 ... Restriction rod body 43 ... Restriction plate body 101 ... Endoscope 102 ... Insertion part 103 ... Operation part 104 ... Universal cord 105 ... Endoscope connector 106 ... Angle operation knob 108 ... Flexible Pipe portion 109 ... Bending portion 110 ... Tip portion 115 ... Composite cable 120 ... External device 121 ... Image display portion O ... Imaging optical axis

Claims (9)

An optical system that focuses the light of the optical image of the subject;
An image sensor for converting the optical image into a video signal;
A holding frame for holding the optical system;
A moving frame that is included in the holding frame so as to be movable along the imaging optical axis of the optical image and is formed of a magnetic member that holds at least one of the optical systems;
The moving frame has two yokes provided on the outer periphery of the holding frame, provided with magnets and spaced apart from each other in the optical axis direction, and a coil provided between the yokes. A drive mechanism for moving the optical image to the imaging element by an optical system to a first stop position and a second stop position at which the optical image is focused;
With
A position regulation adjusting groove having a predetermined length along the imaging optical axis is formed in the holding frame,
An imaging device comprising: a movement position defining member that is provided in at least one of the two yokes and is inserted into the holding frame via the position regulation adjustment groove to regulate movement of the movement frame. apparatus. The yoke provided with the movement position defining member is moved and adjusted in the direction along the imaging optical axis within the predetermined length range of the position regulation adjustment groove to the first stop position or the second stop position. The imaging apparatus according to claim 1, wherein the imaging apparatus is fixed to the holding frame.   The imaging apparatus according to claim 1, wherein the movement position defining member is a plurality of rod bodies that abut on an end surface of the movement frame.   The imaging apparatus according to claim 3, wherein at least one of the plurality of rod bodies is a magnetic body.   The imaging apparatus according to claim 1, wherein the movement position defining member is a ring member that contacts an end surface of the movement frame.   The imaging apparatus according to claim 1, wherein the movement position defining member is a plate member that contacts an end surface of the movement frame.   The imaging apparatus according to claim 5, wherein the movement position defining member is a magnetic body. The first stop position is a wide end and the second stop position is a tele end;
The imaging apparatus according to claim 1, wherein the movement position defining member restricts movement of the moving frame at least at the tele end. The imaging device according to any one of claims 1 to 8,
An insertion section provided with the imaging device;
An endoscope characterized by comprising:

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