JP4671097B2 - Lens barrel and imaging device - Google Patents

Description

  The present invention relates to a lens barrel and an imaging device.

As a lens barrel incorporated in an imaging apparatus such as a digital still camera or a digital video camera, a lens barrel having a cemented lens in which a concave lens and a convex lens are cemented is provided. Such a lens barrel holds a cemented lens. A lens holding frame (see, for example, Patent Document 1).
The lens holding frame includes a cylindrical wall portion extending over the entire area in the axial direction and the circumferential direction of the outer peripheral surface of the cemented lens, and concave portions provided at a plurality of locations where the cylindrical wall portion faces the outer peripheral surface of the cemented lens. I have.
Fixing the cemented lens to the lens holding frame is performed by adhering the cemented lens and the cylindrical wall portion by filling the concave portion with an adhesive while the cemented lens is accommodated in the cylindrical wall portion. ing.

JP 2004-170772 A

In such a lens barrel, since the cylindrical wall portion of the lens holding frame extends over the entire area in the axial direction and the circumferential direction of the outer peripheral surface of the cemented lens, the cylindrical wall portion extends along the axial direction and the circumferential direction. Therefore, there is a limit to downsizing the outer shape of the lens holding frame, which is disadvantageous in reducing the size of the lens barrel and the imaging device.
The present invention has been made in view of such circumstances, and an object thereof is to provide a lens barrel and an imaging apparatus that are advantageous in reducing the space occupied by the lens holding frame for holding the cemented lens and reducing the size. It is in.

In order to achieve the above-mentioned object, the present invention is a lens barrel having a lens holding frame for holding a cemented lens in which the concave lens and the convex lens are joined with their optical surfaces aligned with each other. The outer peripheral surface of the convex lens is formed of a cylindrical surface having a diameter smaller than the outer diameter of the concave lens, and the concave lens has an annular end surface that faces the outer peripheral portion of the convex lens and is located on the outer side in the radial direction of the convex lens. A cylindrical wall portion having an inner peripheral surface larger than the outer diameter of the cylindrical surface is formed on the lens holding frame so as to protrude, and at a plurality of positions spaced in the circumferential direction of the cylindrical wall portion, An open adhesive filling cutout is provided at the distal end surface of the cylindrical wall portion that communicates with the outer peripheral surface of the cylindrical wall portion, and the cemented lens has the convex lens inserted into the cylindrical wall portion, The annular end surface of the concave lens is cylindrical The annular end surface is attached to the cylindrical wall portion by the adhesive filled in the adhesive filling notch, the outer diameter of the annular end surface of the concave lens, The outer diameter of the front end surface of the cylindrical wall portion is formed with an equal dimension, the annular end surface of the concave lens is formed to extend on a plane orthogonal to the optical axis, and the front end surface of the cylindrical wall portion is The adhesive filling notch is formed so as to extend in a radial direction of the cylindrical wall portion, and the adhesive filling notch is formed on the cylinder perpendicular to the optical axis. It is characterized by opening in the radial direction of the tip of the wall-like wall and the cylindrical wall .
The present invention is also an imaging apparatus including a lens barrel having a lens that guides a subject image and an imaging element that captures the subject image guided by the lens, and the lens includes a concave lens and a convex lens. The lens barrel includes a lens holding frame that holds the cemented lens, and the outer peripheral surface of the convex lens is the concave lens. The concave lens has an annular end surface that faces the outer periphery of the convex lens and is located on the outer side in the radial direction of the convex lens. A cylindrical wall portion having an inner peripheral surface larger than the outer diameter of the cylindrical surface is formed to project, and communicated with the outer peripheral surface of the cylindrical wall portion at a plurality of positions spaced in the circumferential direction of the cylindrical wall portion. The tip of the cylindrical wall An open adhesive filling notch is provided on the surface, and in the cemented lens, the convex lens is inserted into the cylindrical wall portion, and the annular end surface of the concave lens is in contact with the distal end surface of the cylindrical wall portion. The annular end surface is attached to the cylindrical wall portion by the adhesive filled in the adhesive filling notch, and the outer diameter of the annular end surface of the concave lens and the front end surface of the cylindrical wall portion Are formed with the same outer diameter , the annular end surface of the concave lens is formed to extend on a plane orthogonal to the optical axis, and the tip surface of the cylindrical wall portion is on a plane orthogonal to the optical axis. The adhesive filling notch is formed so as to penetrate in the radial direction of the cylindrical wall portion, and the adhesive filling notch is formed at the tip of the cylindrical wall portion and the cylindrical wall portion. It is characterized by being opened in the radial direction of the cylindrical wall portion .

According to the present invention, the lens holding frame is provided with the cylindrical wall portion and the adhesive filling notch, the convex lens of the cemented lens is inserted into the cylindrical wall portion, and the annular end surface of the concave lens is used as the distal end surface of the cylindrical wall portion. The cemented lens was fixed to the lens holding frame by attaching the annular end surface to the cylindrical wall portion with the adhesive that was in contact and filled in the adhesive filling notch.
Therefore, unlike the conventional case, since the cylindrical wall portion of the lens holding frame does not occupy the space along the circumferential direction and the axial direction of the outer peripheral portion of the concave lens constituting the cemented lens, the lens barrel is configured in that space. Other members and parts can be arranged, which is advantageous in reducing the outer dimensions of the lens barrel and, in turn, reducing the size of the imaging device.
In addition, since the outer diameter of the front end surface of the cylindrical wall portion and the outer diameter of the annular end surface of the concave lens are formed with the same dimension, the area of the portion where the front end surface of the cylindrical wall portion and the end surface of the concave lens overlap each other This is advantageous for securing the adhesive strength between the concave lens and the cylindrical wall portion, that is, for securing the adhesive strength between the cemented lens and the second lens frame.

  For the purpose of reducing the space occupied by the lens holding frame and reducing the size, the lens holding frame is provided with a cylindrical wall portion and an adhesive filling notch, and the convex lens of the cemented lens is inserted into the cylindrical wall portion to form a concave lens. The annular end face is brought into contact with the tip end face of the cylindrical wall portion, and the annular end face is attached to the cylindrical wall portion with the adhesive filled in the adhesive filling notch.

Next, Embodiment 1 of the present invention will be described with reference to the drawings.
1 is a perspective view of the image pickup apparatus according to the first embodiment as viewed from the front, FIG. 2 is a perspective view of the image pickup apparatus according to the first embodiment as viewed from the rear, and FIG. 3 is a block diagram illustrating a configuration of the image pickup apparatus according to the first embodiment. is there.
As shown in FIG. 1, the imaging apparatus 100 of the present embodiment is a digital still camera, and has a case 102 that constitutes an exterior. In the present specification, left and right refer to a state in which the imaging apparatus 100 is viewed from the front, the subject side is referred to as the front in the optical axis direction of the optical system, and the imaging element side is referred to as the rear.
A retractable lens barrel 10 that houses and holds the photographing optical system 104 is provided near the front right side of the case 102, and a flash unit 106 that emits flash light is provided near the upper front of the case 102. ing.
The lens barrel 10 has a use position (wide angle state, telephoto state, and intermediate state between wide angle and telephoto) that protrudes forward from the front surface of the case 102 by the drive unit 146 (FIG. 3) incorporated in the case 102 and the case 102. It is comprised so that it may appear between the accommodation positions accommodated in the front surface (collapsed state).
On the upper end surface of the case 102, a shutter button 108 for taking an image, a zoom operation switch 110 for adjusting the zoom of the photographing optical system 104, a mode changeover switch 112 for changing a reproduction mode, and the like, turning on / off the power source A power switch 114 for performing the operation, and on the rear surface of the case 102 are a display 116 for displaying the captured image, a plurality of operation switches 118 for performing various operations such as photographing, recording, and video display, A control switch 120 for performing an operation such as selecting a menu displayed on the display 116 is provided.
In this embodiment, the mode change switch 112 is a so-called slide switch, and has an operation member 112A protruding from the upper end surface of the case 102. The mode change is performed by sliding the operation member 112A left and right with a finger. It is configured to operate.
The control switch 120 has an operation member 120A that protrudes rearward from the rear surface of the case 102, and the operation member 120A can be tilted in four directions, the vertical direction and the left-right direction, by moving the tip surface with a finger. The tip surface of the case 102 can be pressed in the thickness direction of the case 102 with a finger.
Specifically, the control switch 120 moves the operation member 120 </ b> A in the vertical direction and the horizontal direction, for example, to move the cursor position displayed on the display 116 in the vertical and horizontal directions, or to display the numerical value displayed on the display 116. Etc. can be changed (increase / decrease). Further, the control switch 120 is configured to be able to determine a plurality of selection items (menus) displayed on the display 116 and input numerical values displayed in the input column by pressing the operation member 120A. Has been.

  As shown in FIG. 3, an imaging element 140 composed of a CCD, a CMOS sensor, or the like that images a subject image formed by the imaging optical system 104 is disposed at the rear of the lens barrel 10. The image processing unit 142 generates image data based on the imaging signal output from the imaging device 140 and records the image data in a storage medium 141 such as a memory card, the display processing unit 144 that displays the image data on the display 116, and the drive. Unit 146, control unit 148, and the like. The control unit 148 controls the image processing unit 142, the display processing unit 144, and the driving unit 146 in accordance with operations of the shutter button 108, the zoom operation switch 110, the mode switch 112, the power switch 114, the operation switch 118, and the control switch 120. It has a CPU that operates according to a control program.

Next, a schematic configuration of the lens barrel 10 will be described.
4A and 4B are perspective views for explaining the state of the lens barrel 10, in which FIG. 4A shows a lens retracted state, that is, a retracted state when not in use, and FIG. Show.
5 is a sectional view of the lens barrel 10 in the retracted state, FIG. 6 is a sectional view of the lens barrel 10 in the wide-angle state, and FIG. 7 is a sectional view of the lens barrel 10 in the telephoto state.
8 is an exploded perspective view of the lens barrel 10 as viewed from the front, FIG. 9 is an exploded perspective view showing the third lens holding frame, base, and flexible substrate in FIG. 8, and FIG. 10 is the first lens holding frame in FIG. FIG. 11 is an exploded perspective view showing a second lens holding frame and an automatic exposure apparatus, and FIG. 11 is an exploded perspective view showing a fixed ring and a cam ring in FIG.
12 is an exploded perspective view showing the first lens holding frame, the second lens holding frame, and the base, FIG. 13 is an assembly view of FIG. 12, and FIG. 14 is a cam ring, the first lens holding frame, the second lens holding frame, and the base. FIG. 15 is an assembly view of FIG. 14.
16 is an exploded perspective view of the lens barrel 10 as viewed from the rear, FIG. 17 is an exploded perspective view showing the third lens holding frame, base, and flexible substrate in FIG. 16, and FIG. 18 is the first lens holding frame in FIG. FIG. 19 is an exploded perspective view showing the second lens holding frame, the automatic exposure apparatus, and the third lens holding frame. FIG. 19 is an exploded perspective view showing the fixed ring, the cam ring, and the first lens holding frame in FIG.
20 is an exploded perspective view showing the first lens holding frame, the second lens holding frame, and the base. FIG. 21 is a fixed ring, a cam ring, a first lens holding frame, a second lens holding frame, a third lens holding frame, and a flexible. It is an assembly drawing of a board | substrate.
22 is an exploded perspective view of the third lens holding frame and base, FIG. 23 is an assembly view of FIG. 22, FIG. 24 is a view taken in the direction of arrow A in FIG. 23, and FIG.
FIG. 26 is a perspective view showing a state in which the first lens holding frame, the second lens holding frame, and the base are assembled and is broken along a plane parallel to the optical axis, and FIG. 27 is a plane parallel to the optical axis of the lens barrel. 28 is a sectional view taken along the line YY, FIG. 28 is a sectional view taken along a plane parallel to the optical axis, and FIG. 29 is a sectional view taken along line YY in FIG.
In the drawings of the present specification, there are portions where a plurality of straight lines are drawn on the surface of the lens, the surface of each member, or the surface of each component, but this is displayed on the drawing. There are portions where the plurality of straight lines are drawn, which are actually cylindrical surfaces, curved surfaces, or spherical surfaces.

As shown in FIGS. 5 to 7, the photographing optical system 104 housed in the lens barrel 10 has a three-group configuration optically. That is, when the subject side is the front in the optical axis direction of the lens barrel 10 (the photographing optical system 104) and the imaging element 116 side is the rear in the optical axis direction, the three groups constituting the photographing optical system are from the front to the rear. The first group lens 14, the second group lens 16, and the third group lens 18 are arranged in this order toward the head.
The lens barrel 10 is zoomed by the first group lens 14 and the second group lens 16 being driven in the optical axis direction by a predetermined cam curve, and the third group lens 18 is slightly displaced in the optical axis direction. Perform focusing. That is, the focal length is changed by the displacement of the first group lens 14 and the second group lens 16, and the deviation of the in-focus position caused by the change of the focal length is corrected by the displacement of the third group, and is appropriately focused. ing.

  As shown in FIGS. 8 and 16, the lens barrel 10 includes a base 12 fixed to the case 102, a third lens holding frame 1802 that holds the third lens holding frame 18, an electrical component 19, and a second group lens 16. The second lens holding frame 1602 that holds the first lens, the first lens holding frame 1402 that holds the first group lens 14, the cam ring 20, and the fixed ring 22.

As shown in FIGS. 9, 17 and 25, the base 12 has a plate-like base main body 1202 and a gear accommodating portion 1250 connected to the base main body 1202. In this embodiment, the base 12 is a synthetic resin. It is made.
An opening 1204 is formed through the center of the base body 1202, and a recess 1206 is provided on the rear surface 1212 facing the rear of the base body 1202 so as to surround the periphery of the opening 1204. It is attached to the concave portion 1206 by adhesion or the like so as to face.
As shown in FIGS. 12 and 29, a cylindrical wall 1208 is erected along a cylindrical shape centering on the optical axis of the photographing optical system 104 on the front surface 1214 facing the base body 1202 forward.
Four engaging pieces 1210 project radially outward from the outer periphery of the cylindrical wall 1208 at intervals in the circumferential direction, and these engaging pieces 1210 extend in the circumferential direction on the inner circumference of the cam ring 20. By engaging with the formed engagement groove 2002, the cam ring 20 is supported so as to be rotatable in the circumferential direction of the cam ring 20 and immovable in the axial direction of the cam ring 20 with respect to the base 12. As shown in FIG. 19, the cam ring 20 is formed with an open groove 2003 that is opened at the end of the cam ring 20 and connected to the engagement groove 2002, and is connected to the engagement groove 2002 of the engagement piece 1210. Is engaged by inserting the engagement piece 1210 into the engagement groove 2002 from the open groove 2003.

As shown in FIG. 23, two guide shafts 1216 and 1218 for guiding the third lens holding frame 1802 in the direction of the optical axis are opened 1204 at a portion inside the cylindrical wall 1208 of the front surface 1214 of the base body 1202. The guide shafts 1216 and 1218 extend in parallel with the optical axis of the photographic optical system 104.
One guide shaft 1216 has a rear end fixed to the front surface 1214.
The other guide shaft 1218 has a rear end fixed to the front surface 1214 and a front end supported by a support portion 1220.
The support portion 1220 includes first and second support walls 1220A and 1220B that are erected from the front surface 1214 and a first connection wall 1220C that connects the front ends thereof, and the front end of the guide shaft 1218 is connected to the first connection wall 1220C. It is fixed.

As shown in FIGS. 22, 23, 24, and 25, the front surface 1214 of the base main body 1202 is provided with a magnet attachment portion 1222 adjacent to the support portion 1220.
As shown in FIG. 22, the magnet mounting portion 1222 is spaced apart in the direction around the optical axis in the direction opposite to the second support wall 1220B with respect to the first support wall 1220A and the first support wall 1220A. A third support wall 1222A erected from the front surface 1214, a second connection wall 1222B connected to the first connection wall 1220B and connecting the tips of the first support wall 1220A and the third support wall 1222A, and the first and third The front wall 1214 between the support walls 1220A and 1222A is formed in a rectangular frame shape whose longitudinal direction is aligned with the optical axis direction.
On the inner side of the magnet mounting portion 1222, a strip-shaped drive magnet 4002 and a strip plate that is slightly larger in outline than the drive magnet 4002 and attached to one surface in the thickness direction of the drive magnet 4002. A back yoke 4004 is inserted and attached with its extending direction aligned with the optical axis direction.
The driving magnet 4002 has a first region magnetized on one of the N and S poles and a second region magnetized on the other of the N and S poles along the longitudinal direction of the driving magnet 4002 alternately. Arranged side by side so that the drive magnet 4002 faces the optical axis, and the first and second regions of the drive magnet 4002 are parallel to the tangent of the circumference around the optical axis. The

As shown in FIG. 9, on the front surface 1214 of the base body 1202, three guides are equally spaced in the circumferential direction of the cylindrical wall 1208 (equally spaced in the circumferential direction of the second lens holding frame 1602 described later). The pillars 50 are provided so as to be parallel to the optical axis. In other words, the three guide pillars 50 are provided at equal intervals in the circumferential direction of the cam ring 20 to be described later, and a second lens holding member to be described later is held. It faces the inner peripheral surface 1620 (see FIG. 33) of the frame 1602.
In this embodiment, the guide column 50 is made of synthetic resin and is integrally formed with the base 12.
As shown in FIG. 27, the guide column 50 has an I-shaped cross section including a web 5002 and flanges 5004 at both ends of the web 5002.
The guide column 50 is arranged so that the extending direction of the web 5002 constituting the cross section is parallel to a tangential direction passing through 1208 cylindrical walls located radially outward of the guide column 50. In other words, the guide pillar 50 is disposed so as to be parallel to a tangent line passing through a second lens holding frame 1602 described later.

As shown in FIG. 8, the gear accommodating portion 1250 has an opening 1250A opened forward and an opening 1250B opened laterally facing the optical axis side, and accommodates a speed reduction mechanism 1252 formed of a gear train. ing. When the drive shaft of the motor 1254 constituting the drive unit 146 is rotated, the speed reduction mechanism 1252 decelerates the rotational driving force and transmits it to the cam ring 20 to rotate the cam ring 20.
The motor 1254 is attached to the gear housing 1250, the upstream end gear constituting the reduction mechanism 1252 meshes with the drive gear 1256 of the motor 1254, and the downstream end gear constituting the reduction mechanism 1252 is cammed through the opening 1250B. It meshes with a gear portion 2004 provided on the outer periphery of the ring 20.

As shown in FIG. 9, the main flexible board 60 is attached to the rear surface 1212 of the base 12.
The main flexible board 60 is mounted with a Hall element 7002 for detecting the position of the third lens holding frame 1802 and the like, and the main flexible board 60 is provided with a connection portion that is electrically connected to a terminal portion of the motor 1254. It has been.
A detection signal from the Hall element 7002 is supplied to the control unit 148 through the main flexible board 60, and a drive signal from the control unit 148 is supplied to the motor 1254 through the main flexible board 60.
As shown in FIG. 17, the Hall element 7002 is accommodated and disposed in a mounting recess 1240 provided on the rear surface 1212 of the base 12.
The image sensor 140 is mounted on a flexible board (not shown), and an image signal from the image sensor 140 is supplied to the image processing unit 142 via the flexible board (not shown).

As shown in FIGS. 22 and 27, the third lens holding frame 1802 has a frame body 1804 that holds the third group lens 18.
Bearings 1806 and 1808 are provided at two positions on the frame main body 1804 with the optical axis interposed therebetween, and the guide shafts 1216 and 1218 are inserted into the bearings 1806 and 1808 so that the third lens holding frame 1802 is arranged in the optical axis direction. It is supported so that it can move and cannot rotate around the optical axis.
A coil 4006 (electrical component) wound around an axis orthogonal to the surface of the magnet 4002 facing the third lens holding frame 1802 (around the axis orthogonal to the optical axis) at a position where the frame main body 1804 faces the magnet 4002. Is fixed by an adhesive or the like. The coil 4006 is electrically connected to the main flexible substrate 60 via a coil flexible substrate 4008 (to the electrical component flexible substrate), and a drive signal from the control unit 148 is transmitted to the coil 4006 via the main flexible substrates 60 and 4008. To be supplied. Specifically, as shown in FIG. 22, the distal end portion 4010 of the coil flexible substrate 4008 is connected to the coil 4006 and the proximal end portion 4012 is connected to the main flexible substrate 60.
In this embodiment, the linear motor 40 is configured by the magnet 4002, the back yoke 4004, and the coil 4006, and a magnetic field generated from the coil 4006 by supplying a drive current from the control unit 148 to the coil 4006, and the magnet 4002. The third lens holding frame 1802 is configured to generate a driving force for moving the third lens holding frame 1802 forward or backward in the optical axis direction by magnetic interaction with the magnetic fields of the first and second regions.
As shown in FIGS. 9 and 22, a magnet 7004 is attached to a position where the frame main body 1804 faces the Hall element 7002 by adhesion or the like via a back yoke 7006.
In the present embodiment, the magnetic force (magnetic flux density) of the magnet 7004 is detected by the Hall element 7002, and the detection signal generated by the Hall element 7002 is supplied to the control unit 148, whereby the control unit 148 causes the third lens. The position of the holding frame 1802 in the optical axis direction is detected, and the position detection mechanism 70 is configured by the Hall element 7002, the magnet 7004, and the control unit 148.

As shown in FIGS. 10 and 18, the second lens holding frame 1602 includes an annular plate portion 1606 that holds the second group lens 16 and three circumferentially spaced outer peripheral portions of the annular plate portion 1606, respectively. And a guide portion 1608 extending in the axial direction.
A guide groove 1604 is formed at a location where the guide portion 1608 faces the inner side in the radial direction of the ring plate portion 1606 (the inner peripheral portion of the second lens holding frame 1602).
As shown in FIG. 27, the guide groove 1604 is formed in an open shape radially inward of the second lens holding frame 1602 with a side surface 1604A facing each other and a bottom surface 1604B connecting the back of the side surface 1604A. 1604 extends parallel to the optical axis.
Each guide groove 1604 is engaged with a guide column 50, whereby the second lens holding frame 1602 is supported by the three guide columns 50 so as not to rotate but to move in the axial direction (the optical axis direction).
More specifically, the outer surface 5004A of the flange 5004 at both ends constituting the guide column 50 is engaged with the side surface 1604A of the guide groove 1604 of the second lens holding frame 1602, so that the second lens holding frame 1602 moves in the circumferential direction. And the end surfaces 5004B of the flanges 5004 at both ends engage with the bottom surface 1604B of the guide groove 1604, thereby preventing the second lens holding frame 1602 from moving in the radial direction.
Further, side surfaces 1608A are formed on both sides in the direction orthogonal to the extending direction of the guide portion 1608, and an outer surface 1608B is formed on the surface where the guide portion 1608 faces radially outward.
A second cam pin 1610 protrudes outward in the radial direction at a location near the rear of the location of the second lens holding frame 1602 (location of the guide portion 1608) facing the radially outer side of the guide groove 1604.
As shown in FIG. 18, the second cam pin 16010 of each guide portion 1608 passes through a notch 1410 formed in the outer peripheral portion of the first lens holding frame 1402 to be described later from the outer peripheral portion of the first lens holding frame 1402. As shown in FIG. 19, the second cam pin 1610 is guided by the second cam groove 2012 by the rotation of the cam ring 20 and is engaged with the second cam groove 2012 of the cam ring 20. 1602 is configured to move in the optical axis direction.

As shown in FIGS. 10, 18, and 31 to 33, the electrical unit 19 is provided at the rear part of the second lens holding frame 1602 so as to move integrally with the second lens holding frame 1602 in the optical axis direction. It is configured.
The electrical component 19 has a shutter function and a variable aperture function, and is electrically connected to the main flexible substrate 60 via a shutter flexible substrate 80 (see FIG. 32, electrical component flexible substrate). A drive signal from the control unit 148 is supplied (received) to the electrical unit 19 via the main flexible board 60 and the shutter flexible board 80, whereby the operations of the shutter and the variable aperture are controlled.

As shown in FIGS. 10 and 18, the first lens holding frame 1402 has a cylindrical body 1404 that holds the first lens group 14, and a location where the cylindrical body 1404 faces inward in the radial direction (the first lens holding frame 1402. The guide groove 1406 that engages with the guide portion 1608 of the second lens holding frame 1602 extends along the axial direction.
As shown in FIG. 27, the guide groove 1406 is formed in an open shape on the radially inner side of the first lens holding frame 1402 with a side surface 1406A facing each other and a bottom surface 1406B connecting the back of the side surface 1406A.
The guide portions 1608 are engaged with the respective guide grooves 1406 of the first lens holding frame 1402, whereby the first lens holding frame 1402 is supported by the three guide portions 1608 so as not to be rotatable and movable in the axial direction. .
More specifically, when both side surfaces 1608A of the guide portion 1608 are engaged with both side surfaces 1406A of the guide groove 1406, the movement of the first lens holding frame 1402 in the circumferential direction is prevented, and the outer surface 1608B of the guide portion 1608 is guided. By engaging the bottom surface 1406B of the groove 1406, the first lens holding frame 1402 is prevented from moving in the radial direction.
Three first cam pins 1412 are arranged radially outwardly at equal intervals in the circumferential direction at locations where the cylindrical body 1404 faces radially outward (outer peripheral portion of the first lens holding frame 1402). Projected.
As shown in FIG. 19, each first cam pin 1412 engages with the first cam groove 2010 of the cam ring 20, and the first cam pin 1412 is guided by the first cam groove 2010 by the rotation of the cam ring 20. A lens holding frame 1402 is configured to move in the optical axis direction.
Further, in the retracted state of the lens barrel 10 shown in FIG. 4A, the second cam pin 1610 of the second lens holding frame 1602 is positioned in the notch 1410 of the first lens holding frame 1402, as shown in FIG. The first cam pin 1412 of the first lens holding frame 1402 and the second cam pin 1610 of the second lens holding frame 1602 are located at substantially the same position in the optical axis direction and spaced in the circumferential direction. It is comprised so that it may be located in a location.

As shown in FIGS. 11 and 19, the cam ring 20 has a cylindrical body 2001, and the gear portion 2004 is formed at a position near the rear of the outer peripheral surface of the cylindrical body 2001.
The first and second cam grooves 2010 and 2012 are formed along the circumferential direction on the inner peripheral surface of the cylindrical body 2001, and are connected to the first and second cam grooves 2010 and 2012 at the rear end of the inner peripheral surface. First and second open grooves 2010A and 2012A are formed.
The first lens holding frame 1402 is engaged with the first cam pin 1412 in the first cam groove 2010 by inserting the first cam pin 1412 into the first cam groove 2010 from the first opening groove 2010A.
Further, the second lens holding frame 1602 is engaged with the second cam pin 1610 in the second cam groove 2012 by inserting the second cam pin 1610 into the second cam groove 2012 from the second opening groove 2012A.

As shown in FIGS. 11 and 19, the stationary ring 22 includes a cylindrical body 2202 and a lid portion 2204 attached to a front side portion of the cylindrical body 2202.
The cylindrical body 2202 has an inner diameter that is larger than the outer diameter of the cylindrical wall 1208 of the base 12, and an opening 2203 that communicates with the housing space of the gear housing portion 1250 is formed.
The gear at the downstream end of the gear train in the gear accommodating portion 1250 is engaged with the gear portion 2004 of the cam ring 20 through the opening 2203.
The fixed ring 22 houses the first lens holding frame 1402, the second lens holding frame 1602, the third lens holding frame 1802, and the cam ring 20 inside the cylindrical body 2202, and the lid portion 2204 has a gear housing portion 1250. With the opening 1250 </ b> A closed, the rear end of the cylinder 2202 is attached to the front surface 1214 of the base 12 with a screw or the like.

Next, routing of the shutter flexible substrate 80 will be described.
First, the shutter flexible substrate 80 will be described.
30A and 30B are perspective views of the shutter flexible substrate 80. FIG.
31 is a sectional view of the lens barrel showing the state of the shutter flexible substrate 80 in the retracted state, FIG. 32 is a sectional view of the lens barrel showing the state of the shutter flexible substrate 80 in the wide-angle state, and FIG. 33 is a shutter for the shutter in the telephoto state. 3 is a cross-sectional view of a lens barrel showing a state of a flexible substrate 80. FIG.
FIG. 34A is an explanatory view showing the state of the shutter flexible substrate 80 in the retracted state, and FIG. 34B is an explanatory view showing the state of the shutter flexible substrate 80 in the wide-angle state.
35 is a perspective view showing the routing of the shutter flexible substrate 80, and FIG. 36 is a plan view of the base 12 portion through which the shutter flexible substrate 80 is inserted.

As shown in FIG. 30, the shutter flexible substrate 80 is formed by forming a conductive pattern of a conductive material such as copper on a flexible insulating substrate, and is formed in a strip shape.
A connection terminal that is electrically connected to the main flexible substrate 60 is formed at the base end portion 8002 of the shutter flexible substrate 80, and a connection terminal that is electrically connected to the electrical component 19 is formed at the distal end portion 8004. Yes.
The proximal end portion 8002 and the distal end portion 8004 are connected by a connecting portion 8006 having a uniform width, and a wide portion in which one side in the width direction of the connecting portion 8006 bulges out at a location near the proximal end portion 8002 of the connecting portion 8006. 8008 is formed.
Of one surface of the connecting portion 8006, a portion extending from the boundary between the base end portion 8002 and the connecting portion 8006 to a predetermined length is formed of a band plate formed of a material harder than the shutter flexible substrate 80 (for example, a synthetic resin material). The reinforcing plate 82 is attached with a double-sided adhesive tape or the like.
As shown in FIG. 35, the reinforcing plate 82 is such that the upper end of the reinforcing plate 82 is closer to the base 12 than the upper end of the guide column 50 in a state where the shutter flexible substrate 80 is disposed along the guide column 50. Configured to be located. In other words, the reinforcing plate 82 is provided with a length corresponding to the length of the guide column 50, and the shutter is arranged so that the shutter flexible substrate 80 extends along the guide column 50 at a position facing the surface of the guide column 50. It is attached to the flexible substrate 80 for use.
Accordingly, the portion of the shutter flexible substrate 80 to which the reinforcing plate 82 is attached is held in a state of extending linearly following the shape of the reinforcing plate 82.
On the other hand, the portion of the shutter flexible substrate 80 where the reinforcing plate 82 is not attached, that is, the base end portion 8002, the portion between the base end portion 8002 and the connection portion 8006, and the portion of the connection portion 8006 near the front end portion 8004. The tip portion 8004 is in a flexible state.

Next, routing of the shutter flexible substrate 80 will be described.
As shown in FIG. 36, an insertion hole 1260 for inserting a flexible board is provided in a portion of the base 12 where one of the three guide pillars 50 is provided.
The insertion hole 1260 is provided on the outer side of the guide column 50 facing outward in the radial direction of the cylindrical wall 1208.
The insertion hole 1260 is formed along a contour formed by the surface of the web 5002 of the guide column 50 and the inner surface of each flange 5004 and has a width larger than the width of the connection portion 8006 of the shutter flexible substrate 80. The narrow hole portion 1260A and the wide hole portion 1260B connected to the narrow hole portion 1260A and having a width larger than the width of the wide portion 8008 of the shutter flexible substrate 80 are formed.

In routing the shutter flexible substrate 80, as shown in FIG. 35, the front end portion 8004 of the shutter flexible substrate 80 is inserted from the rear surface 1212 of the base 12 into the wide hole portion 1260B. And it inserts until the wide part 8006 contact | abuts to the step part 1262 provided in the base 12, and the connection part 8006 is located in the narrow hole part 1260A. As a result, the shutter flexible substrate 80 extends forward from the front surface 1214 of the base 12.
In this way, the connecting portion 8006 of the shutter flexible substrate 80 led out in front of the base 12 is along the surface of the guide column 50 facing the inner peripheral surface 1620 (see FIG. 34) of the second lens holding frame 1602, that is, The guide pillar 50 is disposed along the web 5002 between the flanges 5004 at both ends. As a result, the shutter flexible substrate 80 extends along the space formed by the guide grooves 1604 and the guide pillars 50. More specifically, the shutter flexible substrate 80 extends along a space formed by the bottom surface 1604B of the guide groove 1604 of the second lens holding frame 1602 and the surface of the guide column 50 facing the bottom surface 1604B.
Next, the connection terminal of the base end portion 8002 of the shutter flexible substrate 80 is electrically connected and fixed to the main flexible substrate 60 by soldering or the like as will be described later. More specifically, the base end portion 8002 is fixed to the rear surface 1212 of the base 12 via the main flexible board 60, and the location of the rear surface 1212 of the base 12 to which the base end portion 8002 is fixed is relative to the guide column 50. And located outside the cylindrical wall 1208 in the radial direction.
Therefore, the boundary portion between the connecting portion 8006 and the base end portion 8002 is bent by 90 degrees as shown in FIG. 30, and the connecting portion 8006 is guided by the guide column 50 by the reaction force generated at the bent boundary portion. It is urged | biased in the direction pressed on the surface (surface of the web 5002) side.
Further, the connection terminal of the front end portion 8004 of the shutter flexible substrate 80 is electrically connected and fixed to the electrical equipment portion 19 by soldering or the like.
Thus, the routing of the shutter flexible substrate 80 is completed.

Next, the movement of the shutter flexible substrate 80 when the lens barrel 10 is moved to the retracted state, the wide-angle state, and the telephoto state will be described.
As shown in FIGS. 31 and 34A, when the lens barrel 10 is in the retracted state, the second lens holding frame 1602 is positioned closest to the base 12, so that the shutter flexible substrate 80 is provided. The portion closer to the base end portion 8002 of the connection portion 8006 extends along the space formed by the guide groove 1604 and the guide column 50, and the intermediate portion in the longitudinal direction of the connection portion 8006 is 180 at the front end of the guide column 50. The portion close to the tip portion 8004 of the connection portion 8006 extends in the direction of the base 12.
In other words, the portion closer to the front end portion 8004 of the shutter flexible substrate 80 is folded back at the front end of the guide column 50 and is located on the opposite side to the surface of the guide column 50 facing the inner peripheral surface 1620 of the second lens holding frame 1602. It is in a state of extending toward the base 12 side along the column surface.
As shown in FIG. 32, when the lens barrel 10 moves from the retracted state to the wide-angle state, the second lens holding frame 1602 slightly moves forward, so that the tip 8004 of the shutter flexible substrate 80 has moved forward. Only the portion bent 180 degrees (the portion facing the front end of the guide column 50) moves forward from the front end of the guide column 50.
As shown in FIGS. 33 and 34B, when the lens barrel 10 moves from the wide-angle state to the telephoto state, a portion bent 180 degrees by the amount that the front end portion 8004 of the shutter flexible substrate 80 has moved forward ( The portion facing the front end of the guide column 50 greatly moves forward from the front end of the guide column 50.
At this time, the connecting portion 8006 positioned before the front end of the guide column 50 is extended along the extending direction of the surface of the web 5002 of the guide shaft 50 by the elasticity of the shutter flexible substrate 80, in other words, from the front end of the guide column 50. It extends linearly along the inner peripheral surface 1620 of the second lens holding frame 1602 forward.
When the lens barrel 10 moves from the telephoto state to the wide-angle state, or when the lens barrel 10 moves from the wide-angle state to the retracted state, the shutter flexible substrate 80 moves in the order opposite to the above-described order. To do.

In such a configuration, the guide pillar 50 extending in the axial direction and facing the inner peripheral surface 1620 of the second lens holding frame 1602 is erected from the base 12, and the shutter flexible substrate 80 includes the second lens holding frame. Since the distal end portion 8004 extends from the base 12 along the surface of the guide pillar 50 facing the inner peripheral surface 1620 of the 1602 and is connected to the electrical component 19, even if the second lens holding frame 1602 moves, the shutter Since the flexible substrate 80 is maintained along the guide pillars 50, the shutter flexible substrate 80 does not interfere with the second lens holding frame 1602 and the lens holding frame can be smoothly moved while the shutter flexible substrate 80 is in a flexible state. The space occupied by the substrate 80 can be kept to a minimum, which is advantageous in reducing the size of the lens barrel 10 and, in turn, reducing the size of the imaging device 100. But it is advantageous. Further, since the shutter flexible substrate 80 extends along a space formed by the bottom surface 1604B of the guide groove 1604 of the second lens holding frame 1602 and the surface of the guide pillar 50 facing the bottom surface 1604B, It is advantageous in reducing the amount.
Further, since the reinforcing plate 82 is attached to one surface of the connection portion 8006 of the shutter flexible substrate 80, a force in a direction in which the connection portion 8006 is bent (a direction of compression) is applied by the movement of the second lens holding frame 1602. Even in this case, the connecting portion 8006 can maintain the posture along the surface of the guide pillar 50, the shutter flexible substrate 80 can be prevented from interfering with the second lens holding frame 1602, and the second lens holding frame 1602 can be prevented. This is advantageous for smooth movement.

Further, three guide pillars 50 are provided on the base 12 at intervals in the circumferential direction of the cam ring 20 so as to be parallel to the axial direction, and the inner peripheral portion of the second lens holding frame 1602 is provided for each guide pillar 50. Since the second lens holding frame 1602 is supported by each of the guide columns 50 so as not to rotate in the radial direction but to be movable in the axial direction, the circumference passing through the guide columns 50 around the optical axis. As shown in FIG. 27, for example, the components of the imaging apparatus such as the guide shafts 1216 and 1218 and the magnet 4002 can be disposed by using the space between the guide pillars 50, and the linear guide ring is set to the first, Compared to the case where the lens barrel 10 is arranged between the outer periphery of the second lens holding frames 1402 and 1602 and the inner periphery of the cam ring 20, it is advantageous in reducing the diameter dimension of the lens barrel 10, and the imaging apparatus 100 can be downsized. Advantageous in terms of It made. When the first and second lens holding frames 1402 and 1602 are incorporated in the base 12, the guide grooves 1604 of the second lens holding frame 1602 are engaged with the guide pillars 50 of the base 12, so that the second lens holding frame is engaged. 1602 is inserted in the direction of the base 12, and then the first lens holding frame 1402 is inserted in the direction of the base 12 by engaging the guide grooves 1406 of the first lens holding frame 1402 with the respective guide portions 1608. The two-lens holding frames 1402 and 1602 can be easily assembled. In the retracted state of the lens barrel 10, the first cam pin 1412 of the first lens holding frame 1402 and the second cam pin 1610 of the second lens holding frame 1602 are located at substantially the same position in the optical axis direction, and Since the first and second cam pins 1412 and 1610 are located at locations spaced in the circumferential direction, the first and second opening grooves 2010A and 2012A of the cam ring 20 are changed from the first and second cam grooves 2010 and 2012 to each other. It can be inserted at the same time, and after one cam pin is inserted into the cam groove as before, the cam ring 20 is rotated once and then the other cam pin is inserted into the cam groove. This is advantageous.
Moreover, since the cross section of the guide column 50 has an I-shape including the web 5002 and the flanges 5004 at both ends of the web 5002, the space occupied by the guide column 50 is secured while ensuring the strength of the guide column 50. This is advantageous for reduction. Further, the outer surfaces 5004A of the flanges 5004 at both ends constituting the guide pillar 50 are engaged with the side surfaces 1604A of the guide grooves 1604 of the second lens holding frame 1602, and the end surfaces 5004B of the flanges 5004 at both ends are engaged with the bottom surfaces 1604B of the guide grooves 1604. Therefore, a dead space is formed between the portion of the web 5002 and the bottom surface 1604B of the guide groove 1604. Therefore, the second cam pin 1610 is press-fitted into a portion of the second lens holding frame 1602 facing the radially outer side of the guide groove 1604 so that the distal end portion of the second cam pin 1610 is pressed from the inner peripheral surface of the lens holding frame 1602. When protruding, the tip end portion is accommodated in the dead space, which is advantageous in reducing the diameter dimension of the lens barrel 10 by effectively utilizing the dead space of the guide column 50.

Next, a connection structure of the main flexible substrate 60, the coil flexible substrate 4008, and the shutter flexible substrate 80 will be described.
37 is a plan view showing the positional relationship between the main flexible board 60, the coil flexible board 4008, and the shutter flexible board 80, FIG. 38 is a sectional view taken along the line AA in FIG. 37, and FIG. The figure which shows the bending state of a surface part, (B) is a figure which shows the flat state of the undulation surface part of the main flexible substrate 60, FIG. 39 is a perspective view which shows the bending state of the undulation surface part of the main flexible substrate 60, FIG. 60 is a perspective view showing a flat state of the undulating surface portion 60, and FIG. 41 is a perspective view showing a state where the first and second soldering terminal portions are soldered.

First, the main flexible substrate 60 will be described.
The main flexible substrate 60 is composed of a flexible insulating substrate and a conductive pattern formed on the insulating substrate, and is attached to the rear surface 1212 of the base 12 as shown in FIG. 62 and a movable surface portion 64 extending from the attachment surface portion 62.
As shown in FIG. 37, in addition to the Hall element 7002, the attachment surface portion 62 is provided with a detection piece 2020 (see FIG. 8) provided along the circumferential direction of the cam ring 20 at the rear end of the cam ring 20. A photo interrupter 72 to be detected is mounted.
The photo interrupter 72 projects forward from the front surface 1214 of the base 12 through the opening (not shown) of the base 12 in a state where the main flexible board 60 is attached to the rear surface 1212 of the base 12 and detects the cam ring 20. It arrange | positions so that the piece 2020 may be faced.
The detection signal of the photo interrupter 72 is supplied to the control unit 148 via the main flexible substrate 60, and the control unit 148 is configured to identify the rotational position of the cam ring 20 by the detection signal.

The movable surface portion 64 near the attachment surface portion 62 is bent at a right angle with respect to the attachment surface portion 62 and separated from the rear surface 1212 of the base 12 (FIGS. 38A and 39), and the base 12 A undulating surface portion 66 that can be undulated between the flat state (FIG. 38B, FIG. 40) attached to the rear surface 1212 and attached is formed.
A first soldering terminal portion 6602 is formed on the front surface of the undulating surface portion 66 facing the rear surface 1212 of the base 12, and in this embodiment, three connection terminals 6602A arranged on the straight line at intervals are orthogonal to the straight line. Two rows are formed at intervals in the direction, and a total of six connection terminals 6602A are formed.
A reinforcing plate 68 made of a material harder than the insulating substrate is attached to the rear surface opposite to the front surface where the undulating surface portion 66 faces the rear surface 1212 of the base 12, and has a size corresponding to the undulating surface portion 66.

Next, the shutter flexible substrate 80 will be described.
As described above, the base end portion 8002 (rear end) of the shutter flexible substrate 80 is inserted through the insertion hole 1260 (through the opening) of the base 12 and extends behind the rear surface 1212 of the base 12.
A second soldering terminal portion 8020 is formed on the base end portion 8002 of the shutter flexible substrate 80. In this embodiment, two connection terminals 8020A are formed on both sides in the width direction of the base end portion 8002, and the total amount Four connection terminals 8020A are formed.
Next, the coil flexible substrate 4008 will be described.
Similarly to the shutter flexible substrate 80, the base end portion 4012 of the coil flexible substrate 4008 extends through the insertion hole 1260 and extends behind the rear surface 1212 of the base 12.
A second soldering terminal portion 4014 is formed on the base end portion 4012 of the coil flexible substrate 4008. In this embodiment, one connection terminal 4014A is formed on each side of the base end portion 4012 in the width direction, and the total Two connection terminals 4014A are formed.

Next, soldering of the main flexible board 60, the shutter flexible board 80, and the coil flexible board 4008 will be described.
First, as shown in FIGS. 38A and 39, the undulating surface portion 66 is in a bent state.
In this state, the connection terminals 4014A of the second soldering terminal portion 4014 of the coil flexible substrate 4008 are superposed on the connection terminals 6002A of the first soldering terminal portion 6002 of the undulating surface portion 66 and soldered.
Next, each connection terminal 8020A of the second soldering terminal portion 8020 of the shutter flexible substrate 80 is exposed to the rear end of the second soldering terminal portion 4014 of the coil flexible substrate 4008. From above 4008, soldering is performed by superimposing on each connection terminal 6002A of the first soldering terminal portion 6002 of the undulating surface portion 66.
As a result, as shown in FIG. 41, the solder H is soldered between the connection terminals 4014A and 6002A, and the solder H is soldered between the connection terminals 8020A and 6002A. Are electrically connected to the shutter flexible substrate 80 and the coil flexible substrate 4008.

Next, as shown in FIGS. 38 (B) and 40, the undulating surface portion 66 is bent into a flat state, and as shown in FIG. 9, the mounting bracket 74 is applied to the rear surface of the attaching surface portion 62 and the undulating surface portion 66, and attached. The engagement concave portions 7402 provided on both sides of the metal fitting 74 are engaged with the engagement convex portions 1232 on both sides of the base 12 to complete the attachment of the main flexible board 60 to the base 12.
In this state, since the solder H is located between the front surface of the main flexible substrate 60 and the rear surface 1212 of the base 12, it is covered with the insulating substrate of the main flexible substrate 60 and is not exposed to the outside.
In this embodiment, a recess 1230 is formed on the rear surface 1212 of the base 12, and the solder H soldered to the first and second soldering terminal portions 6002, 4014, and 8020 is accommodated in the recess 1230. .

With such a configuration, the undulating surface portion 66 is formed on the main flexible substrate 60, the first soldering terminal portion 6002 is formed on the front surface of the undulating surface portion 66 facing the rear surface 1212 of the base 12, and the shutter flexible substrate 80, Second solder terminal portions 4014 and 8020 are formed at the rear ends of the coil flexible substrate 4008, respectively.
Therefore, the shutter flexible substrate 80 and the second solder terminal portions 4014 and 8020 of the coil flexible substrate 4008 are overlaid on the first soldering terminal portion 6002 of the undulating surface portion 66 with the undulating surface portion 66 in the bent state. In this state, soldering can be performed, which is advantageous in simplifying the assembly work.
Further, if the undulating surface portion 66 is in the above flat state, the solder H is covered with the main flexible substrate 60 and is not exposed to the outside. Therefore, unlike the conventional case, a space for preventing contact between the solder H portion and other members is provided. Since it is not necessary to ensure the size, it is advantageous in reducing the size, and since there is no need to attach a member such as an insulating tape to the solder H portion, it is advantageous in reducing the number of parts and reducing the cost.
In addition, since the reinforcing plate 68 having a size corresponding to the undulating surface portion 66 is attached to the undulating surface portion 66, the undulating surface portion 66 can be reliably bent, and flatness can be ensured when bent, so that the soldering operation is efficient. It is advantageous to perform well.
Further, since the recess 1230 for accommodating the solder H is provided on the rear surface 1212 of the base 12, when the undulating surface portion 66 is in a flat state, the portion of the solder H on the undulating surface portion 66 is spaced backward from the rear surface 1212 of the base 12. This is advantageous for downsizing.

Next, the second group lens 16 and the second lens holding frame 1602 which are the main parts of the present invention will be described.
42 is a cross-sectional view of the second group lens 16 and the second lens holding frame 1602, FIG. 43 is a perspective view of the second lens frame 1602, and FIGS. 44 and 45 illustrate assembly of the second group lens 16 and the second lens holding frame 1602. FIG. 46 and FIG. 46 are explanatory diagrams for adjusting the optical axis of the second group lens 16.

First, the second group lens 16 will be described.
As shown in FIG. 42, the second group lens 16 includes a cemented lens 16A and a lens 16B.
The cemented lens 16A is configured by a concave lens 1650 and a convex lens 1660 having an outer diameter smaller than that of the concave lens 1650 being bonded to each other so that their optical axes coincide with each other.
The concave lens 1650 includes a concave first lens surface 1652 and a concave second lens surface 1654 which is located on the opposite side of the first lens surface 1652 and to which the convex lens 1660 is joined. It is formed with.
At the outer peripheral portions of the first and second lens surfaces 1652 and 1654, annular end surfaces 1652A and 1654A are formed at locations positioned radially outward of the convex lens 1660 with the concave lens 1650 and the convex lens 1660 joined, respectively. 1652A and 1654A extend on a plane orthogonal to the optical axis of the concave lens 1650.
The end surface 1654A of the second lens surface 1652 faces the cylindrical surface 1666 of the convex lens 1660.
The outer edge of the end surface 1652A of the first lens surface 1652 is chamfered to form an annular conical surface 1652B.

The convex lens 1660 has a convex first lens surface 1662 bonded to the concave lens 1650 and a second lens surface 1664 located on the opposite side of the first lens surface 1662, and an outer peripheral portion is formed by a cylindrical surface 1666. ing.
The lens 16B is a separate body from the cemented lens 16A, and the lens 16B includes a planar first lens surface 1672 facing the convex lens 1660 and a convex second lens positioned on the opposite side of the first lens surface 1672. It has a surface 1674 and an outer peripheral portion, and the outer peripheral portion is formed by a cylindrical surface 1676.

Next, the second lens holding frame 1602 will be described.
As shown in FIGS. 42 and 43, a cylindrical wall portion 1630 is formed at the center of the ring plate portion 1606 of the second lens holding frame 1602 so as to face the image sensor 140 side, and face the subject side. A cylindrical wall portion 1640 is formed.
The inner peripheral portion of the cylindrical wall portion 1630 is formed by an inner peripheral surface 1630A having an inner diameter larger than the outer diameter of the cylindrical surface 1666 of the convex lens 1660.
The outer peripheral portion of the cylindrical wall portion 1630 is formed by an outer peripheral surface 1630B having an outer diameter that is substantially the same as the outer diameter of the cylindrical surface 1656 of the concave lens 1650.
A distal end surface 1634 extending in a plane orthogonal to the axial direction (optical axis direction) is formed in an annular shape at the distal end of the cylindrical wall portion 1630. In the present embodiment, the outer diameter of the front end surface 1630 and the outer diameter of the end surface 1654A of the concave lens 1650 are formed with substantially the same dimensions.
At a plurality of locations (three locations in this embodiment) that are equally spaced in the circumferential direction of the cylindrical wall portion 1630, adhesive filling notches 1632 are formed penetrating in the radial direction of the cylindrical wall portion 1630. The agent filling notch 1632 is open to the distal end surface 1634. In other words, the adhesive filling notch 1632 communicates with the outer peripheral surface 1630B of the cylindrical wall portion 1630 and is formed in an open shape on the distal end surface 1634 of the cylindrical wall portion 1630.
The inner peripheral portion of the cylindrical wall portion 1640 is formed by an inner peripheral surface 1640A having an inner diameter slightly larger than the outer diameter of the cylindrical surface 1676 of the lens 16B, and the inner peripheral surface 1640A is equally spaced in the circumferential direction. A plurality of adhesive filling recesses 1642 are formed, and each adhesive filling recess 1642 is open to the distal end surface of the cylindrical wall portion 1640.

Next, assembly of the second group lens 16 and the second lens holding frame 1602 will be described.
First, the lens 16B is inserted into the inner peripheral surface 1640A of the cylindrical wall portion 1640, each adhesive filling concave portion 1642 is filled with an ultraviolet curable adhesive, and the adhesive is cured by irradiating ultraviolet rays so that the lens 16B is Fix to the cylindrical wall 1640. That is, the lens 16B is fixed to the second lens holding frame 1602.
Next, the second lens holding frame 1602 is fixed on an adjustment jig (not shown), and the convex lens 1660 of the cemented lens 16A is connected to the inner peripheral surface of the cylindrical wall portion 1630 of the second lens frame 1602, as shown in FIG. The convex lens 1660 is inserted into the inner peripheral surface 1630A of the cylindrical wall portion 1630 so as to face 1630A, and the end surface 1654A of the second lens surface 1654 is placed on the distal end surface 1634 of the cylindrical wall portion 1630.
In this state, an annular gap is secured between the outer peripheral surface 1630B of the convex lens 1660 and the inner peripheral surface 1630A of the cylindrical wall portion 1630.
Next, as shown in FIG. 46, the pin J of the adjusting jig is pressed against three locations spaced apart in the circumferential direction of the conical surface 1652B of the cemented lens 16A, and the end surface 1654A of the second lens surface 1654 is cylindrical. The protruding amount of each pin J is controlled in a state where it is applied to the tip surface 1634 of the wall 1630. As a result, the cemented lens 16A is moved in a direction perpendicular to the optical axis thereof so that the optical axis of the cemented lens 16A matches the optical axis of the lens 16B.
When the optical axis of the cemented lens 16A and the optical axis of the cemented lens 16A are matched, as shown in FIG. 45, the UV curable type is inserted into each adhesive filling notch 1632 from the needle of the dispenser D for supplying the adhesive. Fill with adhesive. As a result, the ultraviolet curable adhesive adheres to the end surface 1654 A of the second lens surface 1654 in each adhesive filling notch 1632.
Next, the ultraviolet curable adhesive filled in each adhesive filling notch 1632 is irradiated with ultraviolet rays from the ultraviolet lamp L to be cured. As a result, the end surface 1654A of the second lens surface 1654 is attached and fixed to the distal end surface 1634 of the cylindrical wall portion 1630.

According to the present embodiment, the outer peripheral surface of the convex lens 1660 is formed by a cylindrical surface 1666 having a diameter smaller than the outer diameter of the concave lens 1650, and the concave lens 1650 is positioned on the outer side in the radial direction of the convex lens 1660. A cylindrical wall portion 1630 having an inner peripheral surface 1630A larger than the outer diameter of the cylindrical surface 1666 of the convex lens 1660 is formed on the second lens holding frame 1602 so as to protrude from the second lens holding frame 1602. At a plurality of locations spaced in the circumferential direction of 1630, open adhesive filling notches 1632 are provided on the distal end surface 1634 of the cylindrical wall portion 1630 so as to communicate with the outer peripheral surface 1630 B of the cylindrical wall portion 1630. In the lens 16A, the convex lens 1660 is inserted into the cylindrical wall portion 1630, and the annular end surface 1654A of the concave lens 1650 is the tip of the cylindrical wall portion 1630. In contact with the surface 134, the annular end face 1654A is attached to the cylindrical wall portion 1630 with an adhesive bonding agent filled in the filling notches 1632.
Therefore, unlike the conventional case, the space along the entire circumferential direction and the axial direction of the outer peripheral portion of the concave lens 1650 constituting the cemented lens 16A is opened and is not occupied by the cylindrical wall portion 1630 of the second lens holding frame 1602. Therefore, other members and parts (for example, the electrical component 19 shown in FIG. 31) constituting the lens barrel 10 can be arranged in the space, and the outer dimensions (diameter direction dimensions and the dimension of the lens barrel 10) can be arranged. This is advantageous in reducing the size in the optical axis direction and, in turn, reducing the size of the imaging apparatus 100.
Further, in this embodiment, the outer diameter of the distal end surface 1630 of the cylindrical wall portion 1630 and the outer diameter of the end surface 1654A of the concave lens 1650 are formed with substantially the same size, so the distal end surface 1630 of the cylindrical wall portion 1630 and the concave lens This is advantageous in securing the area of the portion where the end surface 1654A of the 1650 is overlapped, and ensures the adhesive strength between the concave lens 1650 and the cylindrical wall portion 1630, that is, the adhesive strength between the cemented lens 16A and the second lens frame 1602. This is advantageous.

Although the present embodiment has been described using a digital still camera as the imaging device, the present invention can be applied to a video camera and other various imaging devices.

It is the perspective view which looked at the imaging device of Example 1 from the front. It is the perspective view which looked at the imaging device of Example 1 from back. 1 is a block diagram illustrating a configuration of an imaging apparatus according to Embodiment 1. FIG. FIG. 5A is a perspective view illustrating a state of the lens barrel 10, in which FIG. 9A illustrates a lens storage state when not in use, that is, a retracted state, and FIG. 9B illustrates a lens protruding state (wide angle state or telephoto state) when in use. It is sectional drawing of the lens-barrel 10 in a retracted state. It is sectional drawing of the lens-barrel 10 in a wide angle state. It is sectional drawing of the lens-barrel 10 in a telephoto state. It is the disassembled perspective view which looked at the lens-barrel 10 from the front. It is a disassembled perspective view which shows a 3rd lens holding frame, a base, and a flexible substrate among FIG. It is a disassembled perspective view which shows the 1st lens holding frame, the 2nd lens holding frame, and an automatic exposure apparatus among FIG. It is a disassembled perspective view which shows a fixed ring and a cam ring among FIG. It is a disassembled perspective view which shows a 1st lens holding frame, a 2nd lens holding frame, and a base. It is an assembly drawing of FIG. It is a disassembled perspective view which shows a cam ring, a 1st lens holding frame, a 2nd lens holding frame, and a base. FIG. 15 is an assembly diagram of FIG. 14. FIG. 16 is an exploded perspective view of the lens barrel 10 as viewed from the rear. It is a disassembled perspective view which shows a 3rd lens holding frame, a base, and a flexible substrate among FIG. It is a disassembled perspective view which shows a 1st lens holding frame, a 2nd lens holding frame, an automatic exposure apparatus, and a 3rd lens holding frame among FIG. It is a disassembled perspective view which shows a fixed ring, a cam ring, and a 1st lens holding frame among FIG. It is a disassembled perspective view which shows a 1st lens holding frame, a 2nd lens holding frame, and a base. FIG. 3 is an assembly diagram of a fixed ring, a cam ring, a first lens holding frame, a second lens holding frame, a third lens holding frame, and a flexible substrate. It is a disassembled perspective view of a 3rd lens holding frame and a base. It is an assembly drawing of FIG. It is A arrow line view of FIG. It is XX sectional drawing of FIG. It is a perspective view which shows the state fractured | ruptured in the surface parallel to an optical axis in the state which assembled the 1st lens holding frame, the 2nd lens holding frame, and the base. It is sectional drawing which fractured | ruptured the lens-barrel in the surface parallel to an optical axis. It is sectional drawing which fractured | ruptured the lens-barrel in the surface parallel to an optical axis. It is the YY sectional view taken on the line of FIG. (A), (B) is a perspective view of the flexible substrate 80 for shutters. Sectional drawing of the lens-barrel which shows the state of the flexible substrate 80 for shutters in a retracted state, It is sectional drawing of the lens-barrel which shows the state of the flexible substrate 80 for shutters in a wide angle state. It is sectional drawing of the lens-barrel which shows the state of the flexible substrate 80 for shutters in a telephoto state. (A) is explanatory drawing which shows the state of the flexible substrate 80 for shutters in a retracted state, (B) is explanatory drawing which shows the state of the flexible substrate 80 for shutters in a wide angle state. It is a perspective view which shows the routing of the flexible substrate 80 for shutters. It is a top view of the base 12 part by which the flexible substrate 80 for shutters is penetrated. 4 is a plan view showing a positional relationship among a main flexible board 60, a coil flexible board 4008, and a shutter flexible board 80. FIG. 37 is a cross-sectional view taken along line AA in FIG. 37, (A) is a diagram illustrating a bent state of the undulating surface portion of the main flexible substrate 60, and (B) is a diagram illustrating a flat state of the undulating surface portion of the main flexible substrate 60. 4 is a perspective view showing a bent state of a undulating surface portion of a main flexible substrate 60. FIG. 4 is a perspective view showing a flat state of the undulating surface portion of the main flexible substrate 60. FIG. It is a perspective view which shows the state by which the 1st, 2nd soldering terminal part was soldered. 4 is a cross-sectional view of a second group lens 16 and a second lens holding frame 1602. FIG. 6 is a perspective view of a second lens frame 1602. FIG. FIG. 8 is an assembly explanatory diagram of the second group lens 16 and the second lens holding frame 1602. FIG. 8 is an assembly explanatory diagram of the second group lens 16 and the second lens holding frame 1602. It is explanatory drawing of the optical axis alignment adjustment of the 2 group lens.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Imaging device, 10 ... Lens barrel, 16A ... Joint lens, 1602 ... 2nd lens holding frame, 1630A ... Inner peripheral surface, 1630 ... Cylindrical wall part, 1630B ... Outer peripheral surface, 1632 ... ... notch for filling adhesive, 1634 ... tip face, 1650 ... concave lens, 1654A ... annular end face, 1660 ... convex lens, 1666 ... cylindrical face.

Claims (2)

A lens barrel having a lens holding frame that holds a cemented lens in which the concave lens and the convex lens are joined with their surfaces aligned in a state in which their optical axes coincide with each other,
The outer peripheral surface of the convex lens is formed of a cylindrical surface having a diameter smaller than the outer diameter of the concave lens,
The concave lens has an annular end surface that faces the outer peripheral portion of the convex lens and is located on the outer side in the radial direction of the convex lens,
A cylindrical wall portion having an inner peripheral surface larger than the outer diameter of the cylindrical surface is formed on the lens holding frame so as to protrude.
In a plurality of locations spaced in the circumferential direction of the cylindrical wall portion, an open adhesive filling notch is provided on the distal end surface of the cylindrical wall portion, which is communicated with the outer peripheral surface of the cylindrical wall portion,
In the cemented lens, an adhesive in which the convex lens is inserted into the cylindrical wall portion, an annular end surface of the concave lens is brought into contact with a distal end surface of the cylindrical wall portion, and the adhesive filling notch is filled The annular end face is attached to the cylindrical wall by
The outer diameter of the annular end surface of the concave lens and the outer diameter of the tip surface of the cylindrical wall portion are formed with equal dimensions ,
An annular end surface of the concave lens is formed extending on a plane orthogonal to the optical axis,
The front end surface of the cylindrical wall portion is formed to extend on a plane orthogonal to the optical axis,
The adhesive filling notch is formed so as to penetrate in the radial direction of the cylindrical wall portion, and the adhesive filling notch is formed in a radial direction of the tip of the cylindrical wall portion and the cylindrical wall portion. A lens barrel that is open . An imaging apparatus including a lens barrel having a lens that guides a subject image and an imaging element that captures the subject image guided by the lens,
The lens is a cemented lens in which the concave lens and the convex lens are joined by joining their surfaces in a state where their optical axes are matched.
The lens barrel is
A lens holding frame for holding the cemented lens;
The outer peripheral surface of the convex lens is formed of a cylindrical surface having a diameter smaller than the outer diameter of the concave lens,
The concave lens has an annular end surface that faces the outer peripheral portion of the convex lens and is located on the outer side in the radial direction of the convex lens,
A cylindrical wall portion having an inner peripheral surface larger than the outer diameter of the cylindrical surface is formed on the lens holding frame so as to protrude.
In a plurality of locations spaced in the circumferential direction of the cylindrical wall portion, an open adhesive filling notch is provided on the distal end surface of the cylindrical wall portion, which is communicated with the outer peripheral surface of the cylindrical wall portion,
In the cemented lens, an adhesive in which the convex lens is inserted into the cylindrical wall portion, an annular end surface of the concave lens is brought into contact with a distal end surface of the cylindrical wall portion, and the adhesive filling notch is filled The annular end face is attached to the cylindrical wall by
The outer diameter of the annular end surface of the concave lens and the outer diameter of the tip surface of the cylindrical wall portion are formed with equal dimensions ,
An annular end surface of the concave lens is formed extending on a plane orthogonal to the optical axis,
The front end surface of the cylindrical wall portion is formed to extend on a plane orthogonal to the optical axis,
The adhesive filling notch is formed so as to penetrate in the radial direction of the cylindrical wall portion, and the adhesive filling notch is formed in a radial direction of the tip of the cylindrical wall portion and the cylindrical wall portion. An imaging device characterized by being opened .

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