JP2006254310A - Imaging device unit, lens barrel and imaging system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device unit, a lens barrel and an imaging system by which imaging devices can be reliably held even when the bonding space for the imaging devices is small and which are advantageous to downsizing. <P>SOLUTION: A reinforcing plate 64 is fitted to a flexible substrate 66 which is soldered on a back side 1108 of a package 1102 of the imaging device 11 and protrusions 6402 of the reinforcing plate 64 from the package 1102 and a back side 46B (concave parts 4616 to be filled with adhesive agent) of fitting parts 4608 are bonded to each other and fixed by adhesive agent S. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an imaging element unit, a lens barrel, and an imaging apparatus.

When assembling the image sensor to the lens barrel, it is proposed that the image sensor unit is configured by attaching the image sensor to the connector and mounting the connector on the mounting substrate, and then attaching the image sensor unit to the lens barrel. (See Patent Document 1).
In such an image sensor unit, a positioning substrate is provided on the image sensor, and the positioning substrate is fastened to the mounting substrate with screws so that the image sensor is fixed so as not to fall off the connector.
However, such a configuration has a problem that the number of parts is large and the assembling work becomes complicated.
For this reason, as shown in (Japanese Patent Application No. 2003-356790), the present applicant has proposed a configuration in which a package constituting an imaging device is bonded to a holder and the holder is attached to a lens barrel with a screw or the like.
According to this configuration, the image sensor is attached to the lens barrel via the holder, which is advantageous in simplifying the configuration.
Japanese Patent No. 3187922

However, in the above configuration, if the area of the package of the image sensor due to downsizing of the image sensor, in other words, the bonding area of the package decreases, a disadvantage occurs in securing the adhesive strength between the image sensor and the holder, There are concerns about disadvantages in reducing the size of the imaging element unit, the lens barrel, and the imaging device.
The present invention has been made in view of such circumstances, and an object of the present invention is to reliably hold the image sensor even if the bonding space in the image sensor is small, and to reduce the size of the image sensor unit, the lens barrel, and the image pickup apparatus. An object of the present invention is to provide an imaging device unit, a lens barrel, and an imaging device that are advantageous.

In order to achieve the above object, an image sensor unit of the present invention includes an image sensor that captures a subject image, an assembly member for assembling the image sensor, and a flexible board electrically connected to the image sensor. The image pickup device includes a plate-shaped package, an image pickup unit accommodated in the package so as to face the surface of the package, and an image pickup device side connection terminal provided on the back surface of the package and connected to the image pickup unit. The assembly member is configured to include a front surface and a back surface positioned at both ends in the thickness direction, an accommodation recess that extends in the thickness direction with a larger outline than the imaging element, and is provided on the front surface. A first opening that exposes the imaging unit in a state where the imaging element is accommodated in the accommodation recess, and a state in which the imaging element is accommodated in the accommodation recess provided on the back surface A second opening that exposes the back surface of the package; and an assembly provided at a location outside the housing recess, wherein the flexible board includes an image sensor side end provided with a board side connection terminal; An extension portion extending from the image sensor side end portion, and the substrate side connection terminal is attached to the image sensor side connection terminal by soldering. The image sensor side end is attached, covers the image sensor side end, protrudes from the image sensor side end and the package, and a reinforcing plate is attached to the image sensor side end. The imaging element is accommodated in the accommodation recess with the imaging part facing the first opening, and the location of the reinforcing plate protruding from the imaging element side end and the package is in contact with the back surface of the assembly part. Characterized in that it is bonded with adhesive.
The present invention also provides a lens barrel including a lens barrel in which an optical system for guiding a subject image is incorporated, and an image sensor unit provided in the lens barrel, the image sensor unit being formed by the optical system. An image sensor that captures a guided subject image; a flexible board that is electrically connected to the image sensor; and an assembly member for assembling the image sensor unit to the lens barrel. The assembly member is configured to include an imaging unit housed in the package so as to face the surface of the package, and an imaging element side connection terminal provided on the back surface of the package and connected to the imaging unit. Are provided on the front surface, front and back surfaces located at both ends in the thickness direction, housing recesses formed in the thickness direction with a larger outline than the image sensor. A first opening that exposes the imaging unit in a state where the imaging element is housed in the housing recess, and a back surface of the package that is provided in the back surface and that houses the imaging device in the housing recess. A second opening; and an assembly provided at a location outside the housing recess, wherein the flexible substrate extends from the image sensor side end provided with the substrate side connection terminal, and the image sensor side end. The image sensor side end portion of the flexible substrate is attached to the back surface of the image sensor in a state where the substrate side connection terminal is attached to the image sensor side connection terminal by soldering. A reinforcing plate is attached to the image sensor side end and the image sensor side end and the package so as to cover the image sensor side end and project from the image sensor side end, and to the first opening of the assembly member. The image sensor is housed in the housing recess with the part facing, and the location of the reinforcing plate projecting from the image sensor side end and the package and the back surface of the assembly part are bonded with an adhesive, and the assembly part Is attached to the lens barrel.
The image pickup apparatus of the present invention is an image pickup apparatus including a lens barrel in which an optical system for guiding a subject image is incorporated, and an image sensor unit provided in the lens barrel, and the image sensor unit includes the optical device. An image sensor that captures a subject image guided by a system, a flexible substrate electrically connected to the image sensor, and an assembly member for assembling the image sensor unit to the lens barrel, A package having a plate shape, an imaging unit accommodated in the package so as to face the surface of the package, and an imaging element side connection terminal provided on a back surface of the package and connected to the imaging unit, The assembly member includes a front surface and a back surface positioned at both ends in the thickness direction, an accommodating recess formed to extend in the thickness direction with a larger outline than the imaging element, A first opening that exposes the imaging unit in a state where the imaging element is accommodated in the accommodation recess, and a back surface of the package in a state where the imaging element is accommodated in the accommodation recess. The flexible substrate includes an image sensor side end provided with a board-side connection terminal, and an image sensor side end. And an extension part extended from the part, and the board side connection terminal is attached to the image sensor side connection terminal by soldering, and the image sensor side end of the flexible substrate on the back surface of the image sensor A reinforcing plate is attached to the image pickup element side end portion so as to cover the image pickup element side end portion and protrude from the image pickup element side end portion and the package, and the first opening of the assembly member The imaging element is accommodated in the accommodation recess with the imaging part facing, and the reinforcing element protruding from the imaging element side end and the package, and the back of the assembly part are bonded with an adhesive, An assembly portion is attached to the lens barrel.

  The present invention is advantageous in reducing the size of the lens barrel and the image pickup apparatus while reliably holding the image pickup element even when the package area is reduced as the package is downsized.

  Attach a reinforcing plate to a flexible board that is attached to the back of the image element package by soldering, and bond the protruding portion of the reinforcing plate protruding from the package to the back of the assembly with an adhesive. The above-mentioned purpose was realized.

Next, Embodiment 1 of the present invention will be described with reference to the drawings.
In this embodiment, a case where a lens barrel provided with an image sensor unit of the present invention is incorporated in an image pickup apparatus will be described.
Next, Embodiment 1 of the present invention will be described with reference to the drawings.
In this embodiment, a case where the lens barrel of the present invention is incorporated in an imaging apparatus will be described.
8 is a perspective view of the imaging apparatus as viewed from the front, FIG. 9 is a front view of the imaging apparatus, FIG. 10 is a rear view of the imaging apparatus, FIG. 11 is a plan view of the imaging apparatus, and FIG. It is a block diagram.
In the present specification, left and right refer to a state in which the imaging apparatus is viewed from the front, the subject side is referred to as the front, and the imaging element side is referred to as the rear.

As shown in FIGS. 8 to 11, the imaging device 100 is a small digital still camera having a front and rear thickness of about 1 cm, a vertical height of about 5 cm, and a horizontal width of about 8 cm, and constitutes an exterior. A case 102 is provided.
The lens barrel 10 according to the present invention is incorporated in the right side portion of the case 102 as shown by a two-dot chain line in the drawing.
As shown in FIG. 12, the lens barrel 10 includes a lens barrel 12, an image sensor 11 accommodated in the lens barrel 12, an optical system 104 that is accommodated in the lens barrel 12 and guides a subject image to the image sensor 11. ing.
The optical system 104 includes an objective lens 14, and the objective lens 14 is disposed facing the front of the case 102 through a lens window 103 provided on the front surface of the case 102.
A flash 106 for emitting photographing auxiliary light, a self-timer lamp 108, and the like are provided at a central portion of the front upper portion of the case 102.
A barrier 110 is provided on the front surface of the case 102 so as to be slidable up and down. The barrier 110 has a lower limit position at which the lens window 103, the flash 106, and the self-timer lamp 108 are exposed forward as shown in FIGS. The lens window 103, the flash 106, and the self-timer lamp 108 are slid to the upper limit position.
A shutter button 112 for taking an image and a zoom operation switch 114 for adjusting the zoom of the photographing optical system are provided on the upper end surface of the case 102.
A power switch (not shown) for turning on / off the power is provided on the upper left side of the case 102.
A display 120 for displaying captured images is provided on the rear surface of the case 102. A mode changeover switch 122 for switching between a still image shooting mode, a moving image shooting mode, and a playback mode is provided on the side of the display 120, and a display. A menu switch 124 for displaying a menu on 120 and a control switch 126 for performing an operation such as selecting a menu displayed on the display 120 are provided.
In addition, a display switch 128 for turning on / off the display on the display 120, an image size changeover switch 130, and the like are provided on the rear surface of the case 102 below the display 120.

As shown in FIG. 12, the image sensor 11 includes a CCD, a CMOS sensor, or the like that captures a subject image formed by the optical system 104.
An image picked up by the image pickup device 11 is output as an image pickup signal to the image processing unit 152, and the image processing unit 152 processes the image pickup signal to generate still image data or moving image image data. (Storage medium) 154 is recorded. The image data is displayed on the display 120 by the display processing unit 156.
Further, the imaging apparatus 100 responds to operations of operation switches such as a shutter button 112, a zoom operation switch 114, the power switch, a mode change switch 122, a menu switch 124, a control switch 126, a display switch 128, and an image size change switch 130. And a control unit 158 including a CPU for controlling the image processing unit 152, the display processing unit 156, and the like.

FIG. 13 is a perspective view of the lens barrel 10 as viewed from the front, and FIG. 14 is a perspective view of the lens barrel 10 as viewed from the lower rear.
15 is a front view of the lens barrel 10, FIG. 16 is a rear view of the lens barrel 10, FIG. 17A is a view as seen from an arrow A in FIG. 15, (B) is a view as seen from an arrow B in FIG. (C) is a C arrow view of FIG. 15, (D) is a D arrow view of FIG.
19 is a cross-sectional view taken along line AA in FIG. 13, and FIG. 20 is a cross-sectional view taken along line BB in FIG.
FIG. 21 is an exploded perspective view showing a part of the configuration of the lens barrel 10, and FIG. 22 is an exploded perspective view showing the remaining configuration of the lens barrel 10.
FIG. 23 is a perspective view of the zoom movable lens group 18 and the focus movable lens group 20.

As shown in FIGS. 13 to 22, the lens barrel 10 includes a lens barrel 12, an objective lens 14, an image sensor 11, and an optical system 104.
In this embodiment, the optical system 104 includes a prism 16, a zoom movable lens group 18, a focus movable lens group 20, a first fixed lens group 22, a second fixed lens group 24, and a third lens. A fixed lens group 26, a guide mechanism 28 for the zoom movable lens group 18, and a guide mechanism 30 for the focus movable lens group 20.
Further, a driving means 32 for moving the zoom movable lens group 18 and a driving means 34 for moving the focus movable lens group 20 are provided.

As shown in FIGS. 13 and 14, the lens barrel 12 has a flat rectangular plate shape having a thickness, a width larger than the thickness, and a length larger than the width. The system 104 is arranged along the length direction of the lens barrel 12 at a portion slightly closer to one side in the width direction than the center of the lens barrel 12 in the width direction.
The lens barrel 12 includes a first lens barrel segment 1202 and a second lens barrel segment 1204 that are divided in the length direction, and a third lens barrel segment that is sandwiched between the two lens barrel segments 1202 and 1204. 1206, the first lens barrel divided body 1202 is located in one half of the lens barrel 12 in the longitudinal direction, and the second lens barrel divided body 1204 is located in the other half of the lens barrel 12 in the longitudinal direction. The third lens barrel divided body 1208 is interposed between the first lens barrel divided body 1202 and the second lens barrel divided body 1204.
In the present embodiment, as shown in FIGS. 8 and 9, the length direction of the lens barrel 10 (lens barrel 12) is arranged in the vertical direction. The lens barrel divided body 1202 is located, the second lens barrel divided body 1204 is located below the lens barrel 12, and the third lens barrel divided body 1208 is located at the center in the vertical direction of the lens barrel 12. Then, one surface in the thickness direction of the lens barrel 12 parallel to the front surface of the case 102 of the imaging device 100 is the front surface of the lens barrel 12, and the other surface parallel to the rear surface of the case 102 is the rear surface of the lens barrel 12. One surface in the width direction of the lens barrel 12 is a left side surface, and the other surface is a right side surface.
Therefore, the lens barrel 12 is arranged inside the case 102 in a state where the width direction, the length direction, and the thickness direction thereof are matched with the left-right direction, the up-down direction, and the front-rear direction of the case 102 of the imaging apparatus 100, respectively. It will be.
In the present embodiment, the first, second, and third lens barrel divided bodies 1202, 1204, and 1206 are formed of a synthetic resin material.

As shown in FIGS. 19, 20, and 21, the first barrel segment 1202 is formed into a flat rectangular parallelepiped shape by the front wall, the rear wall, the left wall, and the right wall, and the interior of the first barrel segment 1202 Is provided with a component housing space 1202A having a rectangular cross section and an open bottom surface, and the objective lens 14 has a lens holder 1402 positioned on the front side and a light shielding frame 1404 positioned on the rear side. It is attached to the upper part of the front surface of the lens barrel divided body 1202.
The prism 16 reflects an image captured by the objective lens 14 downward (to the image sensor 11). The prism 16 is disposed at a location facing the rear of the objective lens 14 in the component housing space 1202A.
In this embodiment, the optical path of the optical system 104 that guides the subject image to the image sensor 11 extends downward from the objective lens 14 and reaches the reflecting surface of the prism 16, and downward from the reflecting surface of the prism 16. And the second optical path portion extending to the image sensor 11, in FIG. 19, the symbol O <b> 1 indicates the optical axis of the first optical path portion, and the symbol O <b> 2 indicates the optical axis of the second optical path portion. Yes.

The first fixed lens group 22 and the zoom movable lens group 18 are disposed below the prism 16 in the component housing space 1202A.
As shown in FIG. 21, the first fixed lens group 22 includes a first fixed lens 2202 incorporated in the mounting portion of the first lens barrel divided body 1202, and the first fixed lens 2202 is shielded as desired. A frame 2204 is provided.

As shown in FIGS. 19, 20, and 21, the zoom movable lens group 18 includes a first zoom lens 1802 and second and third zoom lenses 1804 and 1805 bonded together. .
The first, second, and third zoom lenses 1802, 1804, and 1805 are supported by a zoom lens frame 1806.
The zoom lens frame 1806 is reciprocated along the optical axis direction while being guided by the driving means 32 to the main guide shaft 38 and the sub guide shaft 40, and a zoom operation is performed.
As shown in FIG. 23, the zoom lens frame 1806 is positioned around the first, second, and third zoom lenses 1802, 1804, and 1805, and these first, second, and third zoom lenses 1802, 1804 are disposed. , 1805 and an extending portion 1812 extending from the holding portion 1810 in the width direction in the component housing space 1202A.
As shown in FIG. 21, the extending portion 1812 is provided with flanges 1816 and 1816 facing each other in the longitudinal direction of the lens barrel 12, and the flanges 1816 and 1816 are respectively provided with holes coaxially. . The shafts 3602 and 3602 are rotatably inserted into the holes so that the female screw member 36 cannot move between the flanges 1816 and 1816 in the longitudinal direction of the lens barrel 12 and can swing around the shaft 3602 as a fulcrum. Is bound to. The female screw member 36 has a pair of arms that are biased toward each other by a spring 3601, and a female screw 3604 is provided on each of the facing surfaces of the arms.

Further, as shown in FIG. 23, the extending portion 1812 is provided with a rod insertion hole 1814.
A metal main guide shaft 38 extending in the length direction of the first lens barrel divided body 1202 is slidably inserted into the rod insertion hole 1814. Both ends of the main guide shaft 38 in the length direction are supported by a wall portion constituting the upper surface of the first barrel segment 1202 and a wall portion of the third barrel segment 1206. The main guide shaft 38 extends linearly in parallel with the optical axes of the first, second, and third zoom lenses 1802, 1804, and 1805. In this embodiment, the length of the first lens barrel divided body 1202 is extended. Extends in the direction. Therefore, the main guide shaft 38 guides the zoom movable lens group 18 in the optical axis direction of the zoom movable lens group 18.
Further, as shown in FIG. 23, an engagement groove 1818 is formed at a location of the holding portion 1810 located on the side opposite to the extending portion 1812 and located at the corner of the component housing space 1202A.
A sub guide shaft 40 (FIG. 21) extending in the length direction of the first lens barrel divided body 1202 is slidably inserted into the engagement groove 1818. Accordingly, the sub guide shaft 40 prevents the zoom lens 18 from rotating around the main guide shaft 38. The sub guide shaft 40 extends linearly in parallel with the optical axes of the first, second, and third zoom lenses 1802, 1804, and 1805. In this embodiment, the length of the first lens barrel divided body 1202 is extended. Extends in the direction.
The guide mechanism 28 for the zoom movable lens group 18 includes the main guide shaft 38 and the sub guide shaft 40.

As shown in FIGS. 21 and 23, the driving means 32 for moving the zoom movable lens group 18 includes an assembly member 3202 extending in the length direction of the lens barrel 12 and a motor provided on the upper portion of the assembly member 3202. 3204 and a male screw member 3206 that extends along the assembly member 3202 and is rotationally driven by a motor 3204.
The assembly member 3202 is attached to a notch on the right side surface of the first barrel segment 1202, whereby the male screw member 3206 is located in the component housing space 1202 </ b> A, and the motor 3204 is located on the upper surface of the first barrel segment 1202. To do.
The male screw member 3206 is screwed into the female screw 3604 of the female screw member 36. Therefore, the zoom movable lens group 18 is guided along the optical axis direction while being guided by the main guide shaft 38 and the sub guide shaft 40 by forward and reverse rotation of the motor 3204. It is reciprocated and zooming is performed.
In the present embodiment, the zoom movable lens group 18, the main guide shaft 38, and the male screw member 3206 are arranged inside the first lens barrel divided body 1202 in the width direction of the first lens barrel divided body 1202. The guide shaft 40 is disposed at the position of the zoom lens frame 1806 located on the opposite side of the main guide shaft 38 and the male screw member 3206.

As shown in FIG. 19, FIG. 20, and FIG. 21, the third barrel segment 1206 has an internal portion 1206A that faces the component storage space 1202A and an external portion 1206B that faces the outside of the component storage space 1202A. Yes.
As shown in FIG. 21, the second fixed lens group 24 is attached to the internal portion 1206A with its optical axis coinciding with the optical axis of the zoom movable lens group 18, and an iris is mounted on the rear surface of the second fixed lens 24. An (aperture) 42 is disposed.
The iris 42 includes two diaphragm blades 4202 arranged with the optical axis of the optical system 104 sandwiched in the width direction, and a guide member 4204 that guides each diaphragm blade 4202 to be movable in the width direction. Yes.
The iris 42 is moved in the direction in which the two diaphragm blades 4202 are brought into contact with and separated from each other by the drive unit 44 attached to the outer portion 1206B of the third barrel segment 1206, so that the two diaphragm blades 4202 are opened and closed. Thus, the light quantity of the light beam traveling along the optical axis is adjusted.

As shown in FIG. 22, the second lens barrel divided body 1204 is formed in a rectangular parallelepiped shape by a front wall 1205A, a rear wall 1205B, a left wall 1205C, and a right wall 1205D, and inside the second lens barrel divided body 1204, A component housing space 1204A having a rectangular cross section and opened up and down is formed.
The lower end of the component housing space 1204 </ b> A is closed by attaching the imaging element mounting assembly member 46 and the imaging element 11 to the lower part of the second barrel segment 1204. Therefore, in this embodiment, the second barrel segment 1204 is configured to include the assembly member 46.
Specifically, as shown in FIG. 20, an image sensor mounting portion 1205 for disposing the image sensor 11 is provided below the second barrel segment 1204.
The image sensor mounting portion 1205 includes an opening 1204B that allows the image sensor 11 to face the component housing space 1204A, and a mounting seat 1204E provided around the opening 1204B.
In this embodiment, the image pickup device unit 54 is configured by the image pickup device 11 and the assembly member 46, and the image pickup device 11 is arranged on the lens barrel 12 by attaching the image pickup device unit 54 to the image pickup device mounting portion 1205. It is installed.
The focus movable lens group 20 and the third fixed lens group 26 are disposed at a position located in the center in the width direction of the second barrel segment 1204 in the component housing space 1204A.

As shown in FIG. 22, the focus movable lens group 20 is composed of first and second focus lenses 2002 and 2004 bonded together.
These first and second focus lenses 2002 and 2004 are supported by a focus lens frame 2006.
The focusing lens frame 2006 is reciprocated along the optical axis direction while being guided by the driving means 34 to the main guide shaft 50 and the sub guide shaft 52, and a focusing operation is performed.
As shown in FIG. 23, the focus lens frame 2006 is positioned around the first and second focus lenses 2002 and 2004, and a holding unit 2010 that holds the first and second focus lenses 2002 and 2004; The holding part 2010 has an extending part 2012 extending in the width direction in the component housing space 1204A.
As shown in FIG. 22, flanges 2016 and 2016 that are opposed to each other in the longitudinal direction of the lens barrel 12 are provided in the extension portion 2012. The flanges 2016 and 2016 are provided with holes on the same axis. . The shafts 4802 and 4802 are rotatably inserted into the holes so that the female screw member 48 cannot move between the flanges 2016 and 2016 in the longitudinal direction of the lens barrel 12 and can swing around the shaft 4802 as a fulcrum. Is bound to. The female screw member 48 has a pair of arms biased in a closing direction by a spring 4801, and female screws 4804 are provided on the opposing surfaces of the arms, respectively.

Further, as shown in FIG. 22, the extension portion 2012 is provided with a rod insertion hole 2014.
As shown in FIGS. 22 and 23, a metal main guide shaft 50 is slidably inserted into the rod insertion hole 2014. Both ends of the main guide shaft 50 in the length direction are supported by a wall portion of the third lens barrel divided body 1206 and a wall portion provided at a lower portion of the second lens barrel divided body 1204. The main guide shaft 50 extends linearly in parallel with the optical axes of the first and second focus lenses 2002 and 2004, and extends in the length direction of the second barrel segment 1204 in the present embodiment. is doing. Therefore, the main guide shaft 50 guides the focus movable lens group 20 in the optical axis direction of the focus movable lens 28.
Further, as shown in FIG. 23, an engagement groove 2018 is formed in the holding portion 2010 located on the opposite side to the extending portion 2012.
The sub guide shaft 52 (FIG. 22) is slidably inserted into the engagement groove 2018. Therefore, the sub guide shaft 52 prevents the focusing lens 20 from rotating around the main guide shaft 50. The sub guide shaft 52 is formed integrally with the second lens barrel divided body 1204 and is therefore made of synthetic resin. The sub guide shaft 52 extends linearly in parallel with the optical axes of the first and second focus lenses 2002 and 2004, and extends in the length direction of the second barrel segment 1204 in this embodiment. ing.
The guide mechanism 30 for the focus movable lens group 20 includes the main guide shaft 50 and the sub guide shaft 40.

As shown in FIGS. 22 and 23, the driving means 34 for moving the focus movable lens group 20 includes an assembly member 3402 extending in the length direction of the lens barrel 12 and a motor provided below the assembly member 3402. 3404 and a male screw member 3406 that extends along the assembly member 3402 and is driven to rotate by a motor 3404.
The assembly member 3402 is attached to a notch on the right side surface of the second barrel segment 1204, whereby the male screw member 3406 is located in the component housing space 1204 </ b> A, and the motor 3404 is located in the lower portion of the second barrel segment 1204. To do.
The male screw member 3406 is screwed into the female screw 4804 of the female screw member 48. Accordingly, the movable lens group for focus 20 is guided along the optical axis direction while being guided by the main guide shaft 50 and the sub guide shaft 52 by forward and reverse rotation of the motor 3404. A reciprocating movement is performed and a focusing operation is performed.
Therefore, in the present embodiment, the focus movable lens group 20, the main guide shaft 50, and the male screw member 3404 are arranged in the width direction of the second barrel segment 1204 inside the second barrel segment 1204. The sub guide shaft 52 is disposed at the focus lens frame 2006 located on the opposite side of the main guide shaft 50 and the male screw member 306.

In addition, as shown in FIG. 19, between the upper end of the second barrel segment 1204 </ b> A and the third fixed lens group 26 at the front and rear locations of the second barrel segment 1204 facing the component housing space 1204 </ b> A. An uneven portion 1204C is provided at the location.
Further, an uneven portion 1204D is provided at a position between the third fixed lens group 26 and the image sensor 11 at the front surface portion and the rear surface portion of the second barrel segment 1204 facing the component housing space 1204A.
These concavo-convex portions 1204C and 1204D enter the light that has entered through the objective lens 14, the prism 16, the first fixed lens group 22, the zoom movable lens group 18, the second fixed lens 24, and the focus movable lens group 20. Among them, the light that has reached the front surface portion and the rear surface portion of the second barrel segment 1204 facing the component housing space 1204A is reflected at the rear surface portion, so that reflected light called so-called flare or ghost is generated. It is provided to prevent the reflected light from reaching the light receiving surface of the image sensor 11 and adversely affecting the image signal of the image sensor 11.
Note that the unevenness interval of the uneven portion 1204D provided near the image sensor 11 is larger than the unevenness interval of the uneven portion 1204C provided at a location far from the image sensor 11. This is because the angle of the light striking the concave and convex portion 1204D is smaller than the angle of the light striking the concave and convex portion 1204C, and thus the second lens barrel can be obtained by changing the spacing of the concave and convex portions of the concave and convex portions 1204C and 1204D. There is an advantage that the detachability from the mold is improved when the divided body 1204 is molded.

As shown in FIG. 19, the third fixed lens group 26 is disposed in the part housing space 1204 </ b> A below the imaging element 11 and below the focus movable lens group 20.
As shown in FIG. 22, the first lens barrel divided body 1202, the second lens barrel divided body 1204, and the third lens barrel divided body 1206 are attached to each other by a screw 202 at a location near the drive unit 44. In addition, they are attached to each other by screws 204 in the vicinity of the drive unit 34.

Next, the mounting structure of the image sensor 11 will be described.
1 is a cross-sectional view of the image sensor unit 54, FIG. 2 is a perspective view showing the image sensor unit 54 turned upside down, FIG. 3 is an exploded perspective view of the image sensor unit 54, and FIG. FIG. 5 is an exploded perspective view showing a configuration of a member attached to the upper part of the assembly member 46 in the image sensor unit 54, and FIG. 6 is an assembly adjustment of the image sensor unit 54. FIG. 8A is a rear view of the image sensor 11, and FIG. 8B is a rear view showing a state where the image sensor side end portion 6602 of the flexible substrate 66 is connected to the rear surface of the image sensor 11.

As shown in FIGS. 1, 3, and 4, the image sensor unit 54 includes an image sensor 11, an assembly member 46, a reinforcing plate 64, and a flexible substrate 66.
As shown in FIG. 1, the image sensor 11 includes a package 1102, an image pickup unit 1104, and an image sensor side connection terminal 1110 (see FIG. 8A).
The package 1102 has a flat rectangular plate shape (in this embodiment, a rectangular plate shape), and includes a front surface 1106 and a back surface 1108 formed on both sides in the thickness direction, and four side surfaces connecting the periphery of the front surface 1106 and the back surface 1108. 1110. In this embodiment, the package 1102 is formed by laminating ceramic materials in the thickness direction.
The imaging unit 1104 is disposed in the housing recess of the package 1102 such that the imaging surface 1112 on which the subject image is guided (takes the subject image) faces the surface 1106 of the package 1102, and the housing recess is a plate-shaped seal glass 1113. The imaging unit 1104 is held and sealed inside the package 1102.
As illustrated in FIG. 8A, the image sensor side connection terminals 1110 are provided on both sides of the back surface 1108 of the package 1102 and connected to the imaging unit 1104. The image sensor side connection terminal 1110 is for transmitting an image captured by the image capturing unit 1104 to the outside via the flexible substrate 66.
In this embodiment, the image sensor side connection terminal 1110 is disposed along the two opposing long sides of the back surface 1108 at intervals over the entire length of the long side, and plated with a conductive material for soldering, for example. A layer is formed.

As shown in FIGS. 1 to 4, the flexible substrate 66 includes an image sensor side end portion 6602 provided with a substrate side connection terminal 6610 that can be connected to the image sensor side connection terminal 1110, and an image sensor side end portion. An extended portion 6604 extended from 6602 is included.
More specifically, the image sensor side end portion 6602 has a rectangular shape (rectangular shape in the present embodiment) having a contour that is substantially equal to or slightly larger than the contour of the back surface 1108 of the image sensor 11.
In this embodiment, the board-side connection terminals 6610 are arranged at intervals along two long sides facing each other on the surface of the image sensor side end portion 6602, and a plating layer made of a conductive material for soldering is provided. Is formed.
The extending portion 6604 extends from one long side of the two long sides of the image sensor side end portion 6602 in a direction orthogonal to the long side, and has a first size approximately the same as the back surface 1108 of the image sensor 11. The extending portion 6604A has a second extending portion 6604B extending from the side edge of the first extending portion 6604A in a direction parallel to the long side.
As shown in FIG. 2, a terminal portion 6604C that is electrically connected to the image processing unit 152 is provided at the end of the second extending portion 6604B.
8B, the entire back surface 1108 of the image sensor 11 is aligned with the entire area of the image sensor side end portion 6602, and the back surface 1108 is placed on the image sensor side end portion 6602, and the image sensor side terminal. By soldering 1110 and the board side connection terminal 6610, the flexible board 66 (image sensor side end 6602) is attached to the back surface 1108 of the image sensor 11.

As shown in FIGS. 1 and 3, the reinforcing plate 64 has a rectangular plate shape, and is adhered to the back surface of the flexible substrate 66 with a double-sided adhesive tape or the like so as to cover the position of the imaging element side end portion 6602 of the flexible substrate 66. It is worn.
As will be described later, the reinforcing plate 64 holds the image sensor 11 in cooperation with the assembly member 46, and is therefore formed of a material having sufficient rigidity to hold the image sensor 11, and as such a material, For example, aluminum can be used.
More specifically, the reinforcing plate 64 has a short side having a size substantially matching the size in the short side direction of the package 1102 and a long side having a size larger than the size in the long side direction of the package 1102.
The reinforcing plate 64 is attached to the back surface of the imaging element side end 6602 by making the short side of the reinforcing plate 64 and the short side of the package 1102 parallel to each other, and the long side of the reinforcing plate 64 and the long side of the package 1102. It is done with the edges aligned so that their centers match. Accordingly, both sides of the reinforcing plate 64 in the long side direction become protruding portions 6402 that protrude from both sides of the long side direction of the package 1102.
In this way, by soldering the image sensor side terminal 1110 and the board side connection terminal 6610, one surface of the image sensor 11 and the image sensor side end 6602 is attached, and further, the image sensor side is covered by a double-sided adhesive tape. The other surface of the end portion 6602 and the reinforcing plate 64 are attached to form an image sensor assembly 70 as shown in FIGS.

As shown in FIGS. 1 to 4, the assembly member 46 includes a front recess 46 </ b> A and a rear surface 46 </ b> B positioned at both ends in the thickness direction, and a housing recess formed to extend in the thickness direction with a larger outline than the image sensor 11. 4602 and an assembly portion 4608 provided at a location outside the accommodation recess 4602.
In the present embodiment, the accommodating recess 4602 is a rectangle of a size that accommodates the imaging element 11 and is formed so as to penetrate from the front surface 46A to the rear surface 46B, and the assembling portions 4608 are provided on both sides of the accommodating recess 4602.
The front surface 46A of the assembly member 46 is provided with a first opening 4604 that exposes the imaging unit 1104 in a state where the imaging element 11 is accommodated in the accommodation recess 4602, and the imaging element 11 is accommodated in the accommodation recess 4602 on the back surface 46B. A second opening 4606 that exposes the back surface 1108 of the package 1102 is provided.
On the front surface 46A of the assembly member 46, insertion pieces 4610 for installation into the second barrel segment 1204 project from both sides of the first opening 4604.
Each assembly portion 4608 is formed with a positioning hole 4612 and a screw insertion hole 4614 (corresponding to a bolt insertion hole in the claims).
In addition, a plurality of adhesive filling recesses 4616 that are recessed toward the front surface 46A (open to the front surface 46A) are provided on the back surface of each assembly portion 4608 at intervals in the short side direction of the second opening 4606. Yes.
The imaging element 11 protrudes from both sides of the imaging element side end 6602 and the package 1102 in a state where the imaging element 11 is accommodated in the accommodation recess 4602 so that the imaging part 1104 constituting the imaging element assembly 70 is exposed from the first opening 4604. The protruding portion 6402 of the reinforcing plate 64 and the back surface 46B of the assembly portion 4608 on both sides are bonded together with the adhesive S filled in the adhesive filling recess 4616 to form the imaging element unit 54.

Further, as shown in FIG. 5, the imaging element unit 54 is provided with a seal rubber 56, a light shielding sheet 58, and a filter 60.
That is, a frame-like seal rubber 56 is disposed around the first opening 4604 of the front surface 46 </ b> A of the assembly member 46, and a space 57 that faces the imaging unit 1104 is formed inside the seal rubber 56.
A plate-shaped filter 60 is disposed on the upper end of the seal rubber 56 via a frame-shaped light shielding sheet 58 so as to close the space 57. In this embodiment, the filter 60 is constituted by a low-pass filter.
The filter 60 is disposed so as to press the upper end of the seal rubber 56 through the light shielding sheet 58 by the presser member 62 attached to the assembly member 46, and the seal rubber 56 is compressed by the filter 60. The presser member 62 is attached to the assembly member 46 by engaging the engagement claw 4630 of the assembly member 46 with the engagement groove 6202 of the presser member 62.
Accordingly, the space 57 is closed by the seal rubber 56, the light shielding sheet 58, the filter 60, and the like, and dust and the like are prevented from entering.

Next, assembly of the image sensor unit 54 using the assembly member 46 and the reinforcing plate 64 will be described.
As described above, the image sensor 11 and the image sensor side end portion 6602 are attached, and the image sensor side end portion 6602 and the reinforcing plate 64 are attached to form the image sensor assembly 70.
In the present embodiment, the image pickup device 11 of the image pickup device assembly 70 is positioned with respect to the assembly member 46 using an assembly apparatus.
FIG. 6 is a front view of the assembling apparatus 200.
The assembling apparatus 200 includes a table 202, a jig 80 is provided on the upper surface of the table 202, syringes 82 for applying an adhesive are provided on both sides of the jig 80, and ultraviolet light is irradiated above the jig 80. A light source 84 is provided.
At the time of positioning, the front surface 46A of the assembly member 46 is faced upward, and the imaging element 11 attached (soldered) to the flexible substrate 66 is exposed from the first opening 4604 of the imaging element 1112 and the assembly member 46 is exposed. Into the receiving recess 4602.
In this state, the imaging surface 1112 is attached to the jig 80 with the lower side facing downward, and the assembly member 46 is supported by the jig 80 so as not to move.
In this state, the package 1102 is moved with respect to the assembly member 46, and the position of the package 1102, that is, the position of the image sensor 11 is adjusted. Specifically, the position of the image sensor 11 on the X, Y, and Z axes orthogonal to each other and the inclination of the image sensor 11 with respect to the X, Y, and Z axes are adjusted. That is, 6-axis adjustment is performed.
Specifically, when the imaging element unit 54 is attached to the imaging element attachment portion 1205 via the positioning hole 4612, the center of the imaging surface 1112 of the imaging portion 1104 coincides with the optical axis of the optical system, and The position of the image sensor 11 is adjusted so as to be orthogonal to the optical axis.
In such position adjustment, a predetermined test chart (test pattern) arranged in advance below the jig 80 is imaged by the image sensor 11, and an image generated based on an image signal obtained from the image sensor 11 is generated. This can be done based on the data.
When the position adjustment is completed, the image sensor side end 6602 and the protruding portion 6402 of the reinforcing plate 64 protruding from both sides of the package 1102 and the back surface 46B of each assembly portion 4608 face each other.
In this state, the UV curable adhesive S is filled by the syringe 82 (dispenser) across the protruding portion 6402 of the reinforcing plate 64 and the adhesive filling recess 4616 of each assembly portion 4608.
At this time, since the adhesive filling recess 4616 is open upward, the UV curable adhesive S can be easily and reliably filled.
Since the UV curable adhesive S is viscous and has a semi-fluid form before curing, the filled UV curable adhesive S is used for filling the protruding portion 6402 of the reinforcing plate 64 and the adhesive of the assembly portion 4608. It is in a state of being held between the recess 4616.
Next, the UV curable adhesive S held between the protruding portion 6402 of the reinforcing plate 64 and the adhesive filling recess 4616 of each assembly portion 4608 is irradiated with ultraviolet rays from the light source 84 and cured. At this time, since the adhesive filling recess 4616 of the assembly member 46 is exposed to the outside of the assembly member 46 and is open upward, the ultraviolet rays with respect to the filled UV curable adhesive S are not exposed. Irradiation is easy and reliable.
As a result, the image pickup device 11 of the image pickup device assembly 70 and the assembly member 46 are bonded in a positioned state.
Furthermore, in this embodiment, the first extending portion 6604A of the flexible substrate 66 is folded on the image sensor side end portion 6602 and assembled to the lens barrel 12 as will be described later.

Next, the seal rubber 56, the light shielding sheet 57, the filter 60, and the pressing member 62 are assembled to the assembly member 46 to which the image pickup device 11 is bonded in this manner.
That is, as shown in FIG. 5, the frame-shaped seal rubber 56, the seal rubber 56, and the light shielding sheet 58 are placed in this order around the first opening 4604 of the front surface 46A of the assembly member 46, and then the presser member 62 is moved. It is attached to the front surface 46A of the assembly member 46.
In this way, the image sensor unit 54 is assembled.

The image sensor unit 54 is attached to the image sensor attachment portion 1205 of the lens barrel 12 by inserting the insertion piece 4610 of the assembly member 46 into the opening 1204B of the lens barrel 12, and the assembly portions on both sides of the attachment seat 1204C of the lens barrel 12. 4608 is brought into contact, and the screw inserted through the screw insertion hole 4614 is screwed into the screw hole of the mounting seat 1204E and fastened.
The image sensor mounting portion 1205 is provided with a knock pin (not shown). When the insertion piece 4610 of the assembly member 46 is inserted into the opening 1204B of the lens barrel 12, the knock pin is positioned in the positioning hole of the assembly portion 4608. The image pickup device unit 54 is positioned by being inserted into 4612.

According to this embodiment, the reinforcing plate 64 is attached to the flexible substrate 66 attached to the back surface 1108 of the package 1102 of the image sensor 11 by soldering, and the protruding portion 6402 where the reinforcing plate 64 protrudes from the package 1102. The back surface 46B of the assembly portion 4608 (adhesive filling recess 4616) was adhered and fixed with an adhesive S.
Therefore, by using the protruding portion 6402 of the reinforcing plate 64 and the back surface 46B portion of the assembly member 46, the area bonded by the adhesive S can be secured, and the area of the package 1102 becomes smaller as the package 1102 becomes smaller. Even when the number of the image pickup elements is reduced, the image pickup element 11 can be firmly bonded to the assembly member 46 via the reinforcing plate 64, and the lens barrel and the image pickup apparatus can be downsized while ensuring the bonding strength of the image pickup element 11. Is advantageous.
In this embodiment, the package 1102 of the image sensor 11 has a rectangular plate shape, and the reinforcing plate 64 protrudes from the package 1102 at two locations sandwiching the package 1102 in the long side direction, and the assembly portion 4608. A back surface 46B (adhesive filling concave portion 4616) was adhered and fixed with an adhesive S.
Therefore, it is not necessary to provide a portion for bonding the reinforcing plate 64 and the assembly member 46 on the short side of the image sensor 11, so that the image sensor 11, the reinforcement plate 64, and the assembly member 46 are the long sides of the image sensor 11. This is advantageous in reducing the dimension in the direction (short side direction) perpendicular to the direction.
For this reason, among the dimensions of the lens barrel, the dimension along the short side direction of the imaging element 11 can be reduced, which is advantageous in reducing the size and thickness of the lens barrel and the imaging device.

In addition, although the Example demonstrated the case where UV curable adhesive was used as adhesive S, the kind of adhesive is not limited to UV curable adhesive, and conventionally well-known various adhesives are used. be able to.
In this embodiment, a digital still camera is exemplified as the image pickup apparatus. However, the present invention can naturally be applied to an image pickup apparatus such as a video camera or a television camera.

4 is a cross-sectional view of the image sensor unit 54. FIG. It is a perspective view shown in the state where the image sensor unit 54 was turned upside down. 3 is an exploded perspective view of an image sensor unit 54. FIG. It is a disassembled perspective view shown in the state where the image sensor unit 54 was turned upside down. 4 is an exploded perspective view showing a configuration of a member attached to an upper portion of an assembly member 46 in the image sensor unit 54. FIG. It is explanatory drawing of the assembly adjustment of the image pick-up element unit. (A) is a rear view of the image sensor 11, and (B) is a rear view showing a state in which the image sensor side end portion 6602 of the flexible substrate 66 is connected to the rear surface of the image sensor 11. It is the perspective view which looked at the imaging device from the front. It is a front view of an imaging device. It is a rear view of an imaging device. It is a top view of an imaging device. It is a block diagram which shows the control system of an imaging device. It is the perspective view which looked at the lens barrel 10 from the front. It is the perspective view which looked at the lens barrel 10 from the lower back. 2 is a front view of the lens barrel 10. FIG. 2 is a rear view of the lens barrel 10. FIG. (A) is an A arrow view of FIG. 15, (B) is an B arrow view of FIG. (C) is a C arrow view of FIG. 15, (D) is a D arrow view of FIG. It is AA sectional view taken on the line of FIG. It is BB sectional drawing of FIG. 2 is an exploded perspective view showing a configuration of a part of the lens barrel 10. FIG. 2 is an exploded perspective view showing the remaining configuration of the lens barrel 10. FIG. 3 is a perspective view of a zoom movable lens group 18 and a focus movable lens group 20. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Lens barrel, 11 ... Image pick-up element, 1102 ... Package, 1104 ... Image pick-up part, 1108 ... Back, 46 ... Assembly member, 46A ... Front, 46B ... Back, 4602 ... Housing recessed part , 4604... First aperture, 4606... Second aperture, 4608... Assembly portion, 54... Image sensor unit, 64 .. Reinforcing plate, 66. ...... Imaging device.

Claims (10)

An image sensor for capturing a subject image;
An assembly member for assembling the imaging device;
A flexible substrate electrically connected to the image sensor;
The imaging element includes a plate-shaped package, an imaging unit accommodated in the package so as to face the surface of the package, and an imaging element side connection terminal provided on the back surface of the package and connected to the imaging unit. Consisting of
The assembly member includes a front surface and a back surface positioned at both ends in the thickness direction, a housing recess formed to extend in the thickness direction with a larger outline than the imaging element, and a housing recess provided in the front surface. A first opening that exposes the imaging unit in a state in which the imaging element is accommodated; a second opening that is provided in the back surface and that exposes the back surface of the package in a state in which the imaging element is accommodated in the accommodation recess; An assembly portion provided at a location outside the housing recess,
The flexible substrate is configured to include an imaging element side end provided with a substrate side connection terminal, and an extending part extending from the imaging element side end,
The image sensor side end of the flexible substrate is attached to the back surface of the image sensor with the substrate side connection terminal attached to the image sensor side connection terminal by soldering,
A reinforcing plate is attached to the image sensor side end so as to cover the image sensor side end and protrude from the image sensor side end and the package,
The imaging element is accommodated in the accommodating recess with the imaging unit facing the first opening of the assembly member,
The image sensor side end and the location of the reinforcing plate protruding from the package and the back of the assembly portion are bonded with an adhesive,
An image sensor unit characterized by the above.   The reinforcing plate protrudes from the image sensor side end portion and both sides of the package, the assembly portions are provided on both sides of the housing recess, respectively, and the location of the reinforcing plate and the assembly portion to be bonded with the adhesive are 2. The image pickup device unit according to claim 1, wherein the image pickup device unit includes the reinforcing plate protruding from both sides of the image pickup device and both sides of the package, and the assembly portion provided on both sides of the housing recess. .   The reinforcing plate protrudes from the image sensor side end and both sides of the package, the assembly portions are provided on both sides of the housing recess, respectively, and the location of the reinforcing plate and the assembly portion to be bonded with the adhesive are A portion of the reinforcing plate that protrudes from both sides of the imaging element side and the package, and the assembly portion provided on both sides of the housing recess, and the extending portion of the flexible substrate The imaging element unit according to claim 1, wherein the imaging element unit extends in a direction orthogonal to a direction connecting the assembly parts.   The imaging element unit according to claim 1, wherein an adhesive filling concave portion is provided on a back surface of the assembly portion, and the adhesive is filled in the adhesive filling concave portion.   The imaging device unit according to claim 1, wherein a bolt insertion hole is formed through the assembly portion in a thickness direction thereof.   The imaging element unit according to claim 1, wherein a positioning hole is formed on a surface of the assembly portion.   The image pickup device unit according to claim 1, wherein the image pickup device side end portion and the reinforcing plate are attached by a double-sided adhesive tape.   The image sensor side end is formed to be substantially the same size as the back surface of the image sensor, and the image sensor side end is in a state where the substrate side connection terminal is attached to the image sensor side connection terminal by soldering. The image pickup device unit according to claim 1, wherein the entire back surface of the image pickup device is covered. A lens barrel incorporating an optical system for guiding a subject image;
A lens barrel including an image sensor unit provided in the lens barrel;
The image sensor unit is
An image sensor for imaging a subject image guided by the optical system;
A flexible substrate electrically connected to the imaging device;
An assembly member for assembling the imaging element unit to the lens barrel;
The imaging element includes a plate-shaped package, an imaging unit accommodated in the package so as to face the surface of the package, and an imaging element side connection terminal provided on the back surface of the package and connected to the imaging unit. Consisting of
The assembly member includes a front surface and a back surface positioned at both ends in the thickness direction, a housing recess formed to extend in the thickness direction with a larger outline than the imaging element, and a housing recess provided in the front surface. A first opening that exposes the imaging unit in a state in which the imaging element is accommodated; a second opening that is provided in the back surface and that exposes the back surface of the package in a state in which the imaging element is accommodated in the accommodation recess; An assembly portion provided at a location outside the housing recess,
The flexible substrate is configured to include an imaging element side end provided with a substrate side connection terminal, and an extending part extending from the imaging element side end,
The image sensor side end of the flexible substrate is attached to the back surface of the image sensor with the substrate side connection terminal attached to the image sensor side connection terminal by soldering,
A reinforcing plate is attached to the image sensor side end so as to cover the image sensor side end and protrude from the image sensor side end and the package,
The imaging element is accommodated in the accommodating recess with the imaging unit facing the first opening of the assembly member,
The image sensor side end and the portion of the reinforcing plate protruding from the package and the back of the assembly portion are bonded with an adhesive,
The assembly part is attached to the barrel;
A lens barrel characterized by that. A lens barrel incorporating an optical system for guiding a subject image;
An imaging device comprising an imaging element unit provided in the lens barrel,
The image sensor unit is
An image sensor for imaging a subject image guided by the optical system;
A flexible substrate electrically connected to the imaging device;
An assembly member for assembling the imaging element unit to the lens barrel;
The imaging element includes a plate-shaped package, an imaging unit accommodated in the package so as to face the surface of the package, and an imaging element side connection terminal provided on the back surface of the package and connected to the imaging unit. Consists of
The assembly member includes a front surface and a back surface positioned at both ends in the thickness direction, a housing recess formed to extend in the thickness direction with a larger outline than the imaging element, and a housing recess provided in the front surface. A first opening that exposes the imaging unit in a state in which the imaging element is accommodated; a second opening that is provided in the back surface and that exposes the back surface of the package in a state in which the imaging element is accommodated in the accommodation recess; An assembly portion provided at a location outside the housing recess,
The flexible substrate is configured to include an imaging element side end provided with a substrate side connection terminal, and an extending part extending from the imaging element side end,
The image sensor side end of the flexible substrate is attached to the back surface of the image sensor with the substrate side connection terminal attached to the image sensor side connection terminal by soldering,
A reinforcing plate is attached to the image sensor side end so as to cover the image sensor side end and protrude from the image sensor side end and the package,
The imaging element is accommodated in the accommodating recess with the imaging unit facing the first opening of the assembly member,
The image sensor side end and the portion of the reinforcing plate protruding from the package and the back of the assembly portion are bonded with an adhesive,
The assembly part is attached to the barrel;
A lens barrel characterized by that.

Images