JP2020034831A - Lens device and camera system - Google Patents

Abstract

To provide a lens device capable of detecting a rotation direction and a rotation amount of an operation part with high accuracy by making it possible to adjust a relative position of two brushes.SOLUTION: A lens device comprises an annular substrate 108 having a plurality of conduction parts 108a arranged circumferentially around an optical axis, a base part 109 fixing the annular substrate 108, a first brush 115 which is circumferentially slidable on the conduction parts 108a, a first holding part 116 holding the first frush 115, a second brush 112 placed circumferentially separating from the first brush 115 with an interval and being circumferentially slidable on the conduction parts 108a, a second holding part 113 holding the second bruch 112 and a fixing part 102d fixing the first holding part 115 and the second holding part 113. The fixing part 102d has a concave portion 102c, and the first holding part 115 has a convex portion 116a engaging with the concave portion 102c.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a lens device and a camera system.

  2. Description of the Related Art Some camera systems such as digital cameras and video cameras have a function of changing a lens position such as a focus lens and a zoom lens by manual operation. The user can adjust the lens position by rotating an operation unit provided on a lens device such as a lens barrel. In this case, it is important to accurately detect the rotation direction and the rotation amount of the operation unit.

  The detecting device for detecting the rotation direction and the rotation amount of the operation unit includes a plurality of conductive portions arranged in a circumferential direction of the lens barrel according to a predetermined rule, and slides circumferentially on the plurality of conductive portions. A brush. The brush moves over a plurality of conductive portions by a fixed distance in accordance with the amount of rotation of the operating portion. Therefore, by electrically detecting the presence or absence of contact between the brush and the conductive portion, the rotation direction of the operating portion is changed. And the amount of rotation can be detected. Further, if the two brushes are arranged side by side in the circumferential direction, the detection accuracy of the rotation direction and the rotation amount of the operation unit can be improved. In this case, the relative position of the two brushes is important.

JP-A-10-82944 JP-A-2003-202489

  Patent Literature 1 discloses a detection device that detects a rotation direction and a rotation amount of an operation unit using a plurality of conductive portions and a brush that slides on the plurality of conductive portions. However, Patent Document 1 does not disclose any adjustment of the relative position of the two brushes. Patent Literature 2 discloses a technique for adjusting the positions of two brushes arranged in a circumferential direction. However, this adjustment does not adjust the relative position of the two brushes, but adjusts the circumferential position of the two brushes. That is, in the case of the technique of Patent Literature 2, since the interval between the two brushes is constant, adjustment for detecting the rotation direction and the rotation amount of the operation unit with high accuracy cannot be performed.

  The present invention relates to a lens device including a detection device that detects a rotation direction and a rotation amount of an operation unit by at least two brushes, wherein the relative position of the two brushes can be adjusted so that the rotation direction and the rotation amount can be adjusted. The purpose is to detect with high accuracy.

  A lens device according to an example of the present invention includes an annular substrate having a plurality of conductive portions arranged in a circumferential direction around an optical axis, a base portion for fixing the annular substrate, and the plurality of conductive portions on the conductive portion. A first brush slidable in the circumferential direction, a first holding unit for holding the first brush, and a gap arranged in the circumferential direction from the first brush, and A second brush that is slidable in the circumferential direction, a second holding unit that holds the second brush, and a fixing unit that fixes the first holding unit and the second holding unit. Wherein the base portion is rotatable in the circumferential direction with respect to the fixing portion, and one of the first holding portion and the fixing portion has a concave portion, and the first holding portion and the fixing portion The other of the portions has at least one protrusion engaging the recess.

  According to the present invention, in a lens device including a detection device that detects the rotation direction and the rotation amount of the operation unit using at least two brushes, the rotation direction and the rotation can be adjusted by adjusting the relative position of the two brushes. The amount can be detected with high accuracy.

It is sectional drawing which shows the example of a lens device. It is sectional drawing which shows the example of a rotation detection apparatus. It is an enlarged view of a rotation detecting device. It is a perspective view showing an example of a rotation detecting device. FIG. 4 is a diagram illustrating a state in which the brush unit is mounted on the lens device. FIG. 5 is a diagram illustrating a state in which the brush unit is detached from the lens device. It is a figure showing a brush unit. It is a figure showing the whole picture of an annular substrate. FIG. 4 is a diagram illustrating a relationship between a ring holder, a base, and an annular substrate. It is sectional drawing which shows the example of the lens-barrel provided with the rotation detection apparatus. It is an enlarged view of the area | region X of FIG. It is a perspective view showing an example of a lens barrel provided with a rotation detecting device. It is a figure showing an example of a camera system.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
In the drawings, the same members and elements will be denoted by the same reference characters, without redundant description. In the following description, the direction in which the optical axis extends is referred to as the optical axis direction. The direction perpendicular to the optical axis is called a radial direction, and the direction surrounding the optical axis is called a circumferential direction. In the circumferential direction, one round is 360 ° around the optical axis.

(Lens device)
FIG. 1 shows an example of a lens device.
The lens device 10 has a function of changing the position of a lens such as a focus lens and a zoom lens by manual operation. That is, the user can adjust the lens position by rotating the operation unit (operation ring) 60 provided on the lens barrel 101. The lens device 10 may be an interchangeable lens that can be attached to and detached from the camera body, or may be always integrated with the camera body.

  In the present embodiment, the lens device 10 is premised on an interchangeable lens. Therefore, in the following, for simplicity of description, an example of the lens device detached from the camera body will be described. However, when the interchangeable lens is mounted on the camera body, any one of an autofocus mode, a manual focus mode, and an autofocus + manual focus mode is set from the camera body side. In modes other than the autofocus mode, when the user rotates the operation unit 60, the lens position is adjusted according to the rotation direction and the rotation amount.

  The lens device 10 includes a lens barrel 101, a focus unit 20, a fixed barrel 30, and a mount unit 40. The lens barrel 101 includes an operation unit 60 and a rotation detection device 100. Details of the rotation detection device 100 will be described later. The focus unit 20 is fitted to the lens holding frame 102 of the lens barrel 101 and is fixed to the lens barrel 101. The mount unit 40 is a unit for mounting the lens device 10 on a camera body.

  The focus unit 20 includes a guide cylinder 21, a cam ring 22, an ultrasonic motor unit 23, a focus lens LF, and an aperture unit 24. The ultrasonic motor unit 23 drives the cam ring 22 to rotate. When the cam ring 22 rotates with respect to the guide cylinder 21, the focus lens LF is driven to move straight in the direction indicated by the arrow (optical axis direction). Focus adjustment is performed by such a shift of the focus lens LF. In this example, the aperture unit 24 is included in the focus unit 20. However, the position of the aperture unit 24 is not limited to this, and may be located in a portion other than the focus unit 20.

  The fixed barrel 30 includes a shake correction unit 31, a fourth lens holding frame 37, and a fourth lens group L4. The fourth lens unit L4 is held by a fourth lens holding frame 37. The product substrate 38 is fixed to the fixed cylinder 30 from the optical axis direction.

  The shake correction unit 31 is arranged inside the fixed cylinder 30. The shake correction unit 31 includes a shift lens barrel 32, a shift lens group LS, and a voice coil motor unit 33. The shift lens group LS is held by the shift barrel 32. The voice coil motor unit 33 includes a driving magnet 34, a coil 35, and a yoke 36. The shift lens group LS is driven in the radial direction by the voice coil motor unit 33. The shake correction is performed by shifting the shift lens group LS.

  The product substrate 38 includes a circuit and a wiring for transmitting and receiving a signal for controlling the shift of the shift lens group LS by the shake correction unit 31. That is, the product board 38 is connected to an actuator for detecting the shake of the lens device 10 and a contact unit 42 for communicating with the camera body and receiving power supply from the camera body.

  The mount unit 40 includes a mount 41, a contact unit 42, and a fixed exterior ring 43. The mount 41 is a structural element mounted on the camera body, and the contact unit 42 is incorporated in the mount 41. The fixed outer ring 43 is fitted to the lens holding frame 102 of the lens barrel 101. The mount 41 is fixed to the fixed outer ring 43.

(Lens barrel before brush position adjustment)
Next, the lens barrel 101 before the brush position adjustment will be described in accordance with the assembling order with reference to FIGS.
2 and 4 show examples of the rotation detecting device 100. FIG. FIG. 3 is an enlarged view of the rotation detection device 100 of FIG. FIG. 5 shows a state where the brush units 111 and 114 are mounted on the lens device 10. FIG. 6 shows a state where the brush units 111 and 114 are detached from the lens device 10. FIG. 7 shows the brush unit 114. FIG. 8 shows an overall image of the annular substrate 108. FIG. 9 shows the relationship between the ring holder 105, the base 109, and the annular substrate.

  The lens barrel 101 includes a lens holding frame 102, and the lens holding frame 102 includes a first lens group L1, a second lens group L2, and a third lens group L3. The first to third lens groups L1, L2, L3 are fitted to the lens holding frame 102. Each of the press rings 103a, 103b, and 103c includes a surface that comes into contact with the first to third lens units L1, L2, and L3, and a screw portion that is screwed into the screw portion of the lens holding frame 102.

  First, the first to third lens groups L1, L2, and L3 are fixed to the lens holding frame 102 by fastening the holding rings 103a, 103b, and 103c to the lens holding frame 102. Next, the outer ring 104 is incorporated into the lens holding frame 102. The exterior ring 104 has a plurality of screw holes in the optical axis direction, and the lens holding frame 102 has a plurality of through holes corresponding to the plurality of screw holes of the exterior ring 104 in the optical axis direction. That is, by passing screws through the plurality of through holes through the plurality of screw holes, the outer ring 104 is fixed to the lens holding frame 102.

  Next, the ring holder 105 is incorporated into the lens holding frame 102. The lens holding frame 102 has a plurality of screw holes 102b in the optical axis direction, and the ring holder 105 has a plurality of through holes 105a corresponding to the plurality of screw holes 102b of the lens holding frame 102 in the optical axis direction. That is, the ring holder 105 is fixed to the lens holding frame 102 by passing the screw 106 from the plurality of through holes 105a to the plurality of screw holes 102b.

  Next, the annular substrate unit 107 is assembled into the ring holder 105. That is, when the fixed position rotating roller 110 is inserted into the roller hole 105 b of the ring holder 105, the fixed position rotating roller 110 engages with the circumferential groove 109 a of the base portion 109. Therefore, the annular substrate unit 107 is held in a state where it can be rotated at a fixed position with respect to the ring holder 105. Here, being rotatable in the fixed position means being rotatable in the circumferential direction without changing the position in the lens barrel 101.

  The annular substrate unit 107 includes an annular substrate 108 and a base 109 for fixing the annular substrate 108. As is clear from FIGS. 8 and 9, the annular substrate 108 has a plurality of conducting portions 108a arranged in the circumferential direction around the optical axis. The annular substrate 108 is fixed to the base 109 by, for example, an adhesive.

  Next, the brush units 111 and 114 are incorporated into the lens holding frame 102. The brush unit 114 includes a first brush 115 slidable on the plurality of conducting portions 108a in a circumferential direction, and a first holding portion 116 that holds the first brush 115. The brush unit 111 includes a second brush 112 that is slidable on the plurality of conducting portions 108a in the circumferential direction, and a second holding portion 113 that holds the second brush 112. The first brush 115 has a plurality of conductive terminals 115a, 115b, 115c arranged in a radial direction. Further, the second brush 112 has a plurality of conductive terminals 112a, 112b, 112c arranged side by side in the radial direction.

  The first holding unit 116 and the second holding unit 113 are made of, for example, a resin material. That is, the brush unit 114 is formed by insert molding so that the first brush 115 is integrated with the first holding unit 116. Similarly, the brush unit 111 is also formed by insert molding so that the second brush 112 is integrated with the second holding unit 113. Further, the first and second brushes 115 and 112 are connected to the flexible printed circuit board 117. Thereafter, the flexible printed board 117 is connected to a unit inspection board (not shown) or the product board 38.

  Then, with the first brush 115 connected to the flexible printed circuit board 117, the first holding unit 116 is fixed to the fixing unit 102d of the lens holding frame 102. Similarly, with the second brush 112 connected to the flexible printed circuit board 117, the second holding unit 113 is fixed to the fixing unit 102d of the lens holding frame 102. Here, for example, the first holding portion 116 has a first flat portion S1, and the fixing portion 102d has a second flat portion S2 that comes into contact with the first flat portion S1. Further, the second holding portion 113 has a third flat portion S3, and the fixing portion 102d has a fourth flat portion S4 that comes into contact with the third flat portion S3. Each of the second and fourth plane portions S2 and S4 is a plane perpendicular to the normal V at a predetermined point O of the annular substrate 108 (see FIG. 5).

  Therefore, the first flat portion S1 of the first holding portion 116 is brought into contact with the second flat portion S2 of the fixing portion 102d, and the screw 118 is rounded from the long hole (through hole) 102a of the first holding portion 116. By fastening to the hole (screw hole) 102f, the first holding portion 116 is fixed on the second flat portion S2 of the fixing portion 112d. Also, the third flat portion S3 of the second holding portion 113 is brought into contact with the fourth flat portion S4 of the fixing portion 102d, and the screw 118 is rounded from the round hole (through hole) 102h of the second holding portion 113. By fastening to the hole (screw hole) 102e, the second holding portion 113 is fixed on the fourth plane portion S4 of the fixing portion 112d. As a result, the first and second brushes 115 and 112 are arranged with a gap in the circumferential direction, and come into contact with the plurality of conductive portions 108a.

  Here, for example, when the position of the focus lens LF is changed by a manual operation, the user adjusts the position of the focus lens LF by rotating the operation unit 60 provided on the lens barrel 101. In this case, it is important to adjust the relative positions of the first and second brushes 115 and 112 in order to accurately detect the rotation direction and the rotation amount of the operation unit 60. Adjustment of the relative positions of the first and second brushes 115 and 112 can be performed by shifting one or both of the first and second holding portions 116 and 113.

  Hereinafter, an example in which the position of the first brush 115 is shifted while the position of the second brush 112 is fixed to adjust the relative positions of the first and second brushes 115 and 112 will be described. .

  In this case, within a plane intersecting the optical axis, the width W1 of the second flat portion S2 fixing the first holding portion 116 is equal to the width W2 of the fourth flat portion S4 fixing the second holding portion 113. (See FIG. 6). This is because, as described later, in order to shift the position of the first brush 115, a relatively long second flat portion S2 for sliding the first holding portion 116 is required.

  A screw 118 for fixing the first brush 115 is temporarily fixed to the round hole 102f via a washer 122 and a spring washer 123. This temporary fixing means that the first holding portion 116 linearly slides on the second flat portion S2 of the fixing portion 102d to adjust the relative positions of the first and second brushes 115 and 112 (as described above). (Adjustment of the gap). On the other hand, the position of the second brush 112 is fixed when the relative positions of the first and second brushes 115 and 112 are adjusted. For this reason, the screw 118 for fixing the second brush 112 is fastened to the round hole 102e without passing through the washer 122 and the spring washer 123.

  Thereafter, the relative positions of the first and second brushes 115 and 112 are adjusted. In order to perform this adjustment smoothly, one of the first holding portion 116 and the fixing portion 102d has a concave portion 102c, and the other of the first holding portion 116 and the fixing portion 102d is at least engaged with the concave portion 102c. It has one convex portion 116a.

  In this example, the concave portion 102c is provided on the fixed portion 102d, and at least one convex portion 116a is provided on the first holding portion 116. FIG. 7 shows the relationship between the concave portion 102c and at least one convex portion 116a. With such an engagement relationship, the first brush 115 shifts while being guided in the direction indicated by the arrow. That is, the relative positions of the first and second brushes 115 and 112 can be smoothly adjusted. In addition, after the adjustment, when the first holding portion 116 is fixed on the second flat portion S2 of the fixing portion 102d by screwing, the position of the first brush 115 is not shifted by the guide mechanism. .

  In the present example, the number of the at least one convex portion 116a is two, but is not limited to this. The at least one convex portion 116a may be three or more or one linear convex portion.

  Then, in a state where the concave portion 102c and the at least one convex portion 116a are engaged with each other, the first holding portion 116 linearly slides on the second plane portion S2 of the fixing portion 102d, so that the first and second portions are formed. The relative positions of the brushes 115 and 112 are adjusted. That is, the first holding unit 116 is temporarily fixed to the fixing unit 102d. For this reason, for example, the eccentric pin is inserted into the second adjustment hole 102g of the fixed portion 102d overlapping the first adjustment hole 116b via the first adjustment hole 116b of the first holding portion 116, and is rotated. By doing so, the first holding unit 116 slides.

  The method of sliding the first holding portion 116 in the temporarily fixed state is not limited to the above-described method using the eccentric pin, and another method may be used. Further, the sliding amount of the first holding unit 116 can be determined based on an electric signal (pulse signal) obtained by rotating the annular substrate unit 107 at a fixed position. The fixed position rotation of the annular substrate unit 107 can be performed, for example, by inserting a tool pin into the elongated hole 109b of the base portion 109 and moving the tool pin manually or electrically. Further, the rotation of the annular substrate unit 107 at a fixed position may be performed by grasping a predetermined position in the lens barrel 101 or the like.

  As described above, by engaging the concave portion 102c and the at least one convex portion 116a, the first holding portion 116 slides linearly, and the relative position of the first and second brushes 115 and 112 can be adjusted smoothly. Can be done.

  Adjustment of the relative positions of the first and second brushes 115 and 112 is performed by sliding the first holding portion 116 linearly on the second flat portion S2 of the fixed portion 102d. Moreover, the second plane portion S2 is a plane perpendicular to the normal line V at a predetermined point O of the annular substrate 108. In this case, the circumferential distance between the first and second brushes 115 and 112 sliding on the plurality of conducting portions 60 is approximated as a linear sliding amount of the first holding portion 116. Adjustment of the relative positions of the first and second brushes 115 and 112 is facilitated.

  Finally, when the adjustment of the relative positions of the first and second brushes 115 and 112 is completed, the screw 118 is fastened to the round hole 102f, and the first holding part 116 is fixed on the second flat part S2 of the fixing part 102d. , The position of the first brush 115 is fixed.

  According to the lens barrel 101 including the rotation detection device 100 described above, the relative position of the first and second brushes 115 and 112 can be adjusted, so that the rotation direction and the rotation amount of the operation unit 60 can be accurately determined. Can be detected.

  Further, a surface (a surface intersecting the optical axis) including the plurality of conducting portions 108a on which the first and second brushes 115 and 112 slide, and a fixed portion where the first and second holding portions 116 and 113 are fixed. The second and fourth plane portions S2 and S4 on the portion 102d are, for example, orthogonal to each other. In this case, when the position of the first brush 115 is fixed by the screw 118 after the position of the first brush 115 is determined, the rotational force of the screw 118 does not affect the position of the first brush 115. . That is, the rotational force of the screw 118 acts in the direction of pressing the first brush 115 against the plurality of conducting portions 108a, and does not act in the direction of changing the already adjusted gap between the first and second brushes 115 and 112. . Therefore, when the first holding unit 116 is fixed, the relative positions of the first and second brushes 115 and 112 do not change.

  In this example, the number of the brush units 111 and 114 is two, but may be three or more. The number of the plurality of conductive terminals 115a, 115b, 115c, 112a, 112b, 112c included in the first and second brushes 115, 112 is three, but may be one, two, or four or more. Good.

(Lens barrel after brush position adjustment)
Next, the lens barrel 101 after the brush position adjustment will be further described according to the order of assembly.
10 and 12 show a lens barrel 101 provided with a rotation detecting device 100. FIG. 11 is an enlarged view of a region X in FIG.

  First, the operation unit (operation ring) 60 is incorporated in the rotation detection device 100 related to the lens barrel 101 described above. Next, the focus roller 120 is inserted into the operation unit 60. The focus roller 120 is slidable in the circumferential direction with respect to the circumferential groove 105c of the ring holder 105. Therefore, the operation unit 60 can rotate at a fixed position with respect to the ring holder 105.

  Next, the shaft screw 121 is screwed into the screw hole 119a of the operation unit 60. The shaft screw tip 121 a of the shaft screw 121 is inserted into the elongated hole 109 a of the base 109. Thus, when the operation unit 60 rotates, the rotational force is transmitted to the base unit 109 via the shaft screw 121. That is, the operation unit 60 and the annular substrate unit 107 rotate integrally.

  Then, when the user changes the lens position by a manual operation, the user rotates the operation unit 60 by a fixed amount. At this time, the base unit 109 rotates in conjunction with the operation unit 60. That is, the base portion 109 rotates in a fixed position in the circumferential direction with respect to the fixed portion 102d, and the first and second brushes 115 and 112 fixed to the fixed portion 102d are connected to a plurality of conductive portions arranged in the circumferential direction. 108a.

  Therefore, by electrically processing the contact / non-contact between the first and second brushes 115 and 112 and the plurality of conductive portions 108a, the rotation direction and the rotation amount of the operation unit 60 can be detected. For example, each of the plurality of conductive portions 108a is formed of first to third portions, and the first and third portions are made to correspond to the above-described plurality of conductive terminals 115a, 115b, 115c, 112a, 112b, 112c. . The first to third portions are, for example, a ground phase, an A phase, and a B phase. When the operation unit 60 is rotated, the plurality of conductive terminals 115 a, 115 b, 115 c, 112 a, 112 b, and 112 c detect electric signals of the ground phase, the A phase, and the B phase, and transmit the signals to, for example, the lens CPU Tell The lens CPU can detect the rotation direction and the rotation amount of the operation unit 60 by processing the electric signal.

  As described above, according to the present invention, in the lens device 10 including the detection device that detects the rotation direction and the rotation amount of the operation unit 60 by the first and second brushes 115 and 112, the first and second brushes are provided. The relative positions of the brushes 115 and 112 can be adjusted. Moreover, one of the first holding portion 116 and the fixing portion 102d has a concave portion, and the other of the first holding portion 116 and the fixing portion 102d has a convex portion engaging with the concave portion. That is, the adjustment of the relative position of the first and second brushes 115 and 112 is facilitated, and after the adjustment is completed, the first and second brushes 115 and 112 are screwed to fix the position. Of the brushes 115 and 112 does not shift. Therefore, the rotation direction and the rotation amount of the operation unit 60 can be detected with high accuracy.

(Camera system)
FIG. 13 shows an example of a camera system.
The camera system includes the above-described lens device 10 and a camera body 50 to which the lens device 10 is attached. The camera body 50 has an image sensor 70 that receives light from the lens device 10. The imaging device 70 is a CCD, a CMOS image sensor, or the like.
The present invention can be applied to such a camera system.

(Other embodiments)
The embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various changes can be made within the scope of the gist.

100: rotation detection device 101: lens barrel 102: lens holding frame 102b: screw hole 102c: concave portion 102d fixing portion 102e, 102f: round hole (screw hole)
102g Second adjustment hole 103a, 103b, 103c: Pressing ring 104: Outer ring 105: Ring holder 106: Screw 107: Annular substrate unit 108: Annular substrate 108a: Plural conducting parts 109: Base parts 111, 114: Brush unit 112: 2nd brush 113: 2nd holding part 115: 1st brush 116: 1st holding part 116a convex part 116b 1st adjustment hole 118: screw 122: washer 123: spring washer

Claims (15)

An annular substrate having a plurality of conducting portions arranged in a circumferential direction around the optical axis,
A base portion for fixing the annular substrate,
A first brush slidable in the circumferential direction on the plurality of conductive portions;
A first holding unit that holds the first brush;
A second brush arranged with a gap in the circumferential direction from the first brush and slidable in the circumferential direction on the plurality of conductive portions;
A second holding unit that holds the second brush;
A fixing portion for fixing the first holding portion and the second holding portion,
The base portion is rotatable in the circumferential direction with respect to the fixed portion,
One of the first holding portion and the fixing portion has a concave portion,
The other of the first holding portion and the fixing portion has at least one convex portion that engages with the concave portion,
A lens device characterized by the above-mentioned. The first holding portion has a first flat portion,
The fixing portion has a second flat portion that contacts the first flat portion,
The first holding portion is capable of adjusting the gap by linearly sliding on the second flat portion with the concave portion and the at least one convex portion engaged.
The lens device according to claim 1, wherein: The second holding portion has a third flat portion,
The fixing portion has a fourth flat portion that contacts the third flat portion,
The lens device according to claim 2, wherein: The second and fourth plane portions are planes perpendicular to a normal line at a predetermined point on the annular substrate.
The lens device according to claim 3, wherein: The first holding portion is fixed on the second flat portion,
The second holding portion is fixed on the fourth flat portion,
The lens device according to claim 4, wherein: In a plane intersecting the optical axis, the width of the second plane portion is larger than the width of the fourth plane portion.
The lens device according to claim 5, wherein: The first holding portion has an elongated hole in the first flat portion,
The fixing portion has a round hole overlapping the elongated hole in the second plane portion,
The first holding unit is fixed to the fixing unit by passing a screw from the elongated hole to the round hole.
The lens device according to any one of claims 2 to 6, wherein: The first holding unit is fixed to the fixing unit by the screw via a spring washer,
The lens device according to claim 7, wherein: The first holding portion has a first adjustment hole in the first flat portion,
The fixing portion has a second adjustment hole overlapping the first adjustment hole in the second plane portion,
The first holding portion is slidable on the second flat portion by inserting an eccentric pin into the first and second adjustment holes and rotating the eccentric pin.
The lens device according to any one of claims 2 to 8, wherein: The first holding unit has the at least one protrusion,
The fixing portion has the concave portion,
The lens device according to claim 1, wherein: The at least one projection is a plurality of projections,
The lens device according to any one of claims 1 to 10, wherein: An operation unit that allows the user to change the lens position by manual operation is further provided,
The base unit rotates in conjunction with the operation unit,
The lens device according to claim 1, wherein: The rotation direction and the rotation amount of the operation unit are detected by electrically processing contact / non-contact between the first and second brushes and the plurality of conductive units.
The lens device according to claim 1, wherein: The first and second brushes each include a plurality of conductive terminals arranged in a radial direction.
The lens device according to claim 1, wherein: A lens device according to claim 1,
A camera body having an image sensor that receives light from the lens device,
A camera system, characterized in that:

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