JP2009139579A - Lens barrel and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel precisely adjusting the optical axis of a lens, and to provide an imaging apparatus. <P>SOLUTION: In the lens barrel 2, when a screw 51 is fastened, a leading-end member 44 is pressed by the screw 51 in the direction of the axial line G, and moved from the front side to the back side in the height direction Z. At the same time, when the screw 51 is unfastened, the leading-end member 44 is moved from the back side to the front side in the height direction Z since the leading-end member 44 is energized forward in the axial direction G by a coil spring 43. In addition, when a screw 52 is fastened, the leading-end member 44 is pressed by the screw 52 and moved in the direction of arrow B1. Meanwhile, when the screw 52 is unfastened, the leading-end member 44 is moved in the direction of arrow B2 since the leading-end member 44 is energized by a plate spring 55. Consequently, the position of a guide shaft 14 in the height direction and widthwise direction X is independently adjusted by adjusting the fastness degrees of the screws 51 and 52. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lens barrel and an imaging device applied to, for example, a camera-equipped mobile phone.

As a conventional lens barrel, a lens frame that holds a lens, a guide shaft that guides the movement of the lens frame so that the lens moves along the optical axis direction, and one end portion of the guide shaft that houses the lens frame And a housing in which a guide shaft is eccentrically supported by a bearing (see, for example, Patent Documents 1 to 4). In such a lens barrel, by rotating the bearing, the guide shaft is moved so that the tilt of the guide shaft changes, and the optical axis of the lens is adjusted.
JP 2006-227170 A JP 2006-208554 A JP 2006-309053 A JP 2007-199408 A

  However, in the technique as described above, when the optical axis of the lens is adjusted, the guide axis can only be moved along a fixed trajectory. Therefore, the adjustment of the optical axis of the lens is limited, and the optical axis of the lens is accurate. May not be able to adjust well.

  Therefore, an object of the present invention is to provide a lens barrel and an imaging apparatus that can adjust the optical axis of a lens with high accuracy.

  In order to solve the above problems, a lens barrel according to the present invention includes a lens frame that holds a lens, a guide shaft that guides the movement of the lens frame so that the lens moves along the optical axis direction, and a lens frame. A lens barrel that houses and supports one end of the guide shaft, and is screwed into the housing, and the other end of the guide shaft is in a first direction that intersects the axial direction of the guide shaft. A first pressing member that presses the other end so as to move, and a second that is screwed into the housing and presses the other end so that the other end moves in a second direction that intersects the axial direction. A pressing member, a first biasing member that biases the other end in a direction opposite to the pressing direction of the first pressing member, and another in a direction opposite to the pressing direction of the second pressing member. And a second urging member that urges the end portion.

  In this lens barrel, the other end portion of the guide shaft (hereinafter simply referred to as the “other end portion”) is pressed by the first pressing member by tightening the first pressing member. Since the other end is urged by the first urging member by loosening the first pressing member, the other end is opposite to the first direction. Moved in the direction. Further, by tightening the second pressing member, the other end portion is pressed by the second pressing member, so that the other end portion is moved in the second direction while loosening the second pressing member. Since the other end is urged by the second urging member, the other end is moved in a direction opposite to the second direction. Therefore, each of the positions along the first and second directions on the guide shaft can be adjusted independently, and the optical axis of the lens can be adjusted with high accuracy.

  Here, the first pressing member is screwed to the housing in the axial direction and presses the other end portion in the axial direction, and the second pressing member is screwed to the housing in the second direction and the other end portion. The other end and the housing are preferably in contact with each other via an inclined surface intersecting the axial direction and the first direction.

  In this case, the other end portion pressed in the axial direction by the first pressing member or urged by the first urging member in a direction opposite to the pressing direction moves so as to be guided by the inclined surface. And moved in the first direction or the direction opposite to the first direction. On the other hand, the other end portion pressed in the second direction by the second pressing member or urged by the second urging member in the direction opposite to the pressing direction is the second direction or the second direction. It is moved in the opposite direction. Therefore, the above-described effect of independently adjusting each of the positions along the first and second directions on the guide shaft can be preferably exhibited. Further, in this case, since the first pressing member is screwed to the housing in the axial direction and the second pressing member is screwed to the housing in the second direction, the direction along the first direction in the housing. The structural restrictions (for example, ensuring the length of a screw with which the pressing member is screwed) are reduced, and the housing can be made thinner.

  Each of the first and second pressing members is screwed into the housing in the axial direction and presses the other end portion, and the first pressing member and the other end portion are in the axial direction and the first direction. Preferably, the second pressing member and the other end are in contact with each other via an inclined surface that intersects the axial direction and the second direction.

  In this case, the other end pressed by the first pressing member or urged by the first urging member is moved so as to be guided by the inclined surface intersecting the axial direction and the first direction. , Moved in the first direction or in the direction opposite to the first direction. The other end pressed by the second pressing member or urged by the second urging member is moved so as to be guided by the inclined surface intersecting the axial direction and the second direction. , Moved in the second direction or in the direction opposite to the second direction. Therefore, the above-described effect of independently adjusting each of the positions along the first and second directions on the guide shaft can be preferably exhibited. Furthermore, in this case, since each of the first and second pressing members is screwed into the housing in the axial direction, the structural restrictions in the first and second directions in the housing are reduced, and the housing is made thinner. It can be realized.

  An imaging apparatus according to the present invention includes the lens barrel described above and an imaging element that detects light imaged by the lens.

  Since this imaging apparatus includes the lens barrel described above, an effect similar to the above effect, that is, an effect of accurately adjusting the optical axis of the lens is exhibited.

  According to the present invention, the optical axis of the lens can be adjusted with high accuracy.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  First, a first embodiment of an imaging device according to the present invention will be described. FIG. 1 is a perspective view of a first embodiment of an imaging apparatus according to the present invention. As shown in FIG. 1, the imaging apparatus 1 includes a rectangular parallelepiped lens barrel 2 having a rectangular bottom surface and a height shorter than each side of the bottom surface, and an imaging element 3 such as a CMOS. ing. A bending optical system is applied to the lens barrel 2. Thereby, in the imaging apparatus 1, light incident from the subject side along the optical axis L <b> 1 parallel to the height direction (hereinafter simply referred to as “height direction”) Z of the lens barrel 2 is transmitted from the lens barrel 2. The image is bent by 90 ° by the lens barrel 2 along the optical axis L2 parallel to the longitudinal direction (hereinafter, simply referred to as “longitudinal direction”) Y of the bottom surface, and is detected by the imaging device 3.

  2 is an exploded perspective view of the imaging apparatus of FIG. 1, and FIG. 3 is an internal configuration diagram of the imaging apparatus of FIG. As shown in FIGS. 2 and 3, the lens barrel 2 includes a box-shaped housing 4. The housing 4 has an opening 5a that opens toward the image sensor 3 in the longitudinal direction Y, and an opening on one side in a direction X (hereinafter referred to as “width direction”) that is orthogonal to the longitudinal direction Y and orthogonal to the height direction. The main body part 5 in which the opening part 5b to be formed is formed, and the cover part 6 that covers the opening part 5a of the main body part 5 are provided. Each of the main body 5 and the lid 6 is made of, for example, polycarbonate with glass fiber, and is integrally formed by injection molding.

  A light passage hole 5c through which light traveling from the subject side along the optical axis L1 enters the main body portion 5 on the front wall of the main body portion 5 (that is, the wall having the bottom surface on the subject side of the lens barrel 2). A light transmission plate 7 that covers the light passage hole 5 c is attached to the front wall of the main body 5. A lens may be used in place of the light transmission plate 7. In the housing 4, a prism 8 is disposed on the optical axis L1 on the rear side of the light passage hole 5c and bends light incident from the subject side along the optical axis L1 by 90 ° along the optical axis L2. Has been. In the housing 4, a fixed lens 11 positioned on the front side of the image sensor 3 on the optical axis L <b> 2 is disposed. The prism 8 is held by the main body 5, and the fixed lens 11 is held by the lid 6.

  Note that the end of the main body 5 opposite to the image sensor 3 in the longitudinal direction Y is bent in a crank shape on the back wall of the main body 5 (that is, the wall having the bottom surface opposite to the subject of the lens barrel 2). In this way, the cutout portion 5d is formed, so that it is thinner (lower profile) than the other portions of the main body portion 5. As described above, the end of the main body 5 opposite to the image sensor 3 in the longitudinal direction Y can be thinned because the end of the main body 5 has a thickness of the prism 8 disposed therein. This is because it is enough to consider the amount of time.

  Further, in the housing 4, there are a shutter / zoom lens unit 12 positioned on the optical axis L 2 and a zoom focus lens unit 13 positioned between the shutter / zoom lens unit 12 and the fixed lens 11 on the optical axis L 2. Has been placed.

  The shutter / zoom lens unit 12 includes a shutter that selectively passes and blocks light traveling along the optical axis L2, and a zoom lens. The shutter / zoom lens unit 12 includes a cylindrical engaging portion 12a that engages with a guide shaft 14 provided on the opening 5b side with respect to the optical axis L2 in the housing 4, and an optical axis L2 in the housing 4. On the other hand, it has a U-shaped groove-like engaging portion 12b that engages with a rotation-preventing shaft 15 that is provided upright on the opposite side of the opening 5b. Accordingly, the shutter / zoom lens unit 12 can move along the optical axis L2 in a state where the rotation around the optical axis L2 is restricted.

  The zoom focus lens unit 13 includes a zoom focus lens. The zoom focus lens unit 13 includes a cylindrical engaging portion 13a that engages with a guide shaft 16 that is erected on the side of the opening 5b with respect to the optical axis L2 in the housing 4, and a U that engages with a rotation preventing shaft 15. It has a groove-shaped engaging portion 13b. Thereby, the zoom focus lens unit 13 can move along the optical axis L2 in a state where the rotation around the optical axis L2 is restricted. The guide shaft 14 and the guide shaft 16 are juxtaposed in the height direction Z.

  A drive unit 17 is disposed in the opening 5 b of the main body 5. FIG. 4 is a perspective view of a drive unit of the imaging apparatus of FIG. As shown in FIG. 4, the drive unit 17 has a support member 18 including a rectangular thin plate-like mounting portion 18 a and rectangular thin plate-like support portions 18 b and 18 c erected at both ends in the longitudinal direction. Yes. The support member 18 is integrally formed by bending a stainless steel thin plate.

  A stepping motor 21 is attached to the outer surface of the support portion 18b. Both ends of the lead screw 22 of the stepping motor 21 are pivotally supported by support portions 18b and 18c, and a driven nut 23 having a convex portion 23a is screwed into a portion between the support portions 18b and 18c of the lead screw 22. Has been. On the other hand, a stepping motor 24 is attached to the outer surface of the support portion 18c. Both ends of the lead screw 25 of the stepping motor 24 are pivotally supported by support portions 18b and 18c, and a driven nut 26 having a convex portion 26a is screwed into a portion between the support portions 18b and 18c of the lead screw 25. Has been. The lead screw 22 and the lead screw 25 are juxtaposed in the standing direction of the support portions 18b and 18c.

  As shown in FIGS. 2 and 3, the drive unit 17 is disposed in the opening 5 b of the main body 5 so that the standing direction of the support portions 18 b and 18 c coincides with the height direction Z. 18 a is attached to the main body 5 by being screwed to the front wall of the main body 5. As described above, in the drive unit 17, the stepping motor 21 and the stepping motor 24 are alternately arranged so that the lead screw 22 and the lead screw 25 are close to each other. As a result, the drive unit 17 contributes to the thinning of the main body 5 and the lens barrel 2.

  The convex portion 23 a of the driven nut 23 screwed into the lead screw 22 is fitted in the concave portion of the engaging portion 12 c of the shutter / zoom lens unit 12. Thereby, when the lead screw 22 is rotated by the stepping motor 21, the shutter / zoom lens unit 12 moves along the optical axis L2. On the other hand, the convex portion 26 a of the driven nut 26 screwed into the lead screw 25 is fitted in the concave portion of the engaging portion 13 c included in the zoom focus lens unit 13. Thus, when the lead screw 25 is rotated by the stepping motor 24, the zoom focus lens unit 13 moves along the optical axis L2.

  A circuit board 27 provided with an image pickup device 3 located on the rear side of the fixed lens 11 on the optical axis L2 on the inner surface is attached to the lid portion 6 of the housing 4. A shutter drive circuit, a motor drive circuit, and the like are also provided on the inner surface of the circuit board 27, and a connector connection port 28 for inputting and outputting electrical signals to the circuit board 27 is provided on the outer surface of the circuit board 27. It has been. Each of the stepping motors 21 and 24 and the motor drive circuit of the drive unit 17 is a flexible printed circuit board (hereinafter referred to as an outer surface of the side wall facing the opening 5a and the outer surface of the side wall facing the opening 5b in the main body 5). (Referred to as “FPC”) 31. The shutter and the shutter drive circuit of the shutter / zoom lens unit 12 are electrically connected by the FPC 32 extending to the outer surface of the side wall of the main body 5 facing the opening 5b and the FPC 31 electrically connected to the FPC 32. ing.

  The drive unit 17 disposed in the opening 5b of the main body 5 and the FPC 31 disposed on the outer surface of the side wall facing the opening 5a in the main body 5 are formed by bending a thin plate made of stainless steel into an L shape. It is covered by an integrally formed exterior cover 33. Further, the FPC 31 disposed on the outer surface of the side wall facing the opening 5b in the main body 5 and the circuit board 27 attached to the lid 6 of the housing 4 are formed by bending a thin plate made of stainless steel into an L shape. It is covered with an integrally formed exterior cover 34.

  The exterior cover 33 and the exterior cover 34 are detachably engaged with each other at a corner where the side wall facing the opening 5 a and the side wall facing the opening 5 b intersect in the main body 5. Pinned to the lid portion 6 of the housing 4 at a corner portion sandwiched between the portion 5a and the opening portion 5b. The exterior cover 34 is electrically connected to the ground terminal of the circuit board 27. Further, the exterior covers 33 and 34 are formed on the outer surface of the front wall and the outer surface of the main body 5 by vapor deposition or the like. The metal film is electrically connected. Thereby, each component of the imaging device 1 is covered with the electromagnetic shield. A portion of the exterior cover 34 corresponding to the connector connection port 28 of the circuit board 27 is cut out so that the connector can be accessed with respect to the connector connection port 28.

  Next, the guide shaft 14 described above will be described in detail.

  As shown in FIG. 3, the guide shaft 14 guides the movement of the shutter / zoom lens unit 12 so that the shutter / zoom lens unit (lens, lens frame) 12 moves along the direction of the optical axis L2. It is. The guide shaft 14 has a shaft body 41 and a tip member 44.

  The shaft body 41 is disposed in the housing 4 with its axis G parallel to the optical axis L2 (that is, along the longitudinal direction Y). Further, the engaging portion 12 a of the shutter / zoom lens unit 12 is slidably engaged with the shaft body 41. A base end portion (one end portion) 41 a which is a rear end portion of the shaft body 41 is fitted into and supported by the concave portion 42 of the main body portion 5 of the housing 4. Specifically, the recess 42 is provided on the opening 5b side of the main body 5 with respect to the fixed lens 11 and opens forward.

  A coil spring 43 is interposed between the recess 42 and the base end portion 41a. The coil spring 43 urges the base end portion 41 a toward the front side in the longitudinal direction Y, and is disposed coaxially with the shaft body 41. Here, the shaft body 41 and the coil spring 43 are separate members, but they may be integrally formed. Further, instead of the coil spring 43, an urging spring may be used.

  5 is a partial cross-sectional view taken along the line V-V in FIG. 3, and FIG. 6 is a perspective view showing a main part of the lens barrel in the image pickup apparatus in FIG. As shown in FIGS. 5 and 6, the distal end member 44 is fixed to the distal end portion 41 b of the shaft body 41 and constitutes the distal end portion (the other end portion) of the guide shaft 14. The tip member 44 has a substantially cubic shape with one side on the tip side cut out. That is, on the outer surface of the tip member 44, an inclined surface S <b> 1 that intersects the direction of the axis G is formed to contact the inner surface of the recess 45 of the main body 5. As shown in FIG. 3, the recess 45 is provided on the opening 5 a side of the main body 5 with respect to the prism 8 and opens rearward. Further, as shown in FIG. 5, the surface on the bottom wall 5e side of the recess 45 is provided with an inclined surface S2 along the notch 5d.

  The tip member 44 is accommodated in the recess 45 such that the inclined surface S1 comes into contact with the inclined surface S2 of the recess 45. That is, the tip member 44 and the housing 4 are in contact with each other via the inclined surface S (inclined surfaces S1, S2), and the inclined surface S intersects the axis G direction and the height direction Z.

  Further, in the state in which the tip member 44 is accommodated in the recess 45, a screw (first pressing member) 51 is brought into contact with the surface 44a on the tip side, and as shown in FIG. A screw (second pressing member) 52 is in contact with the side surface 44b. An adhesive (not shown) is filled around the tip member 44 in the recess 45.

  As shown in FIGS. 5 and 6, the screw 51 has a cylindrical shape, and a male screw is formed on the outer peripheral surface thereof. This screw 51 is screwed into the bottom wall portion 53 of the main body portion 5 constituting the bottom surface of the recess 45 in the direction of the axis G so as to face the tip member 44. Therefore, by tightening the screw 51 to the bottom wall portion 53, the distal end surface of the screw 51 is brought into contact with the surface 44a, and the distal end member 44 is pressed rearward in the axis G direction.

  As shown in FIGS. 3 and 6, the screw 52 has a cylindrical shape, and a male screw is formed on the outer peripheral surface thereof. The screw 52 is screwed into the side wall portion 54 of the main body portion 5 constituting the opening side surface of the recess 45 in the width direction X toward the tip member 44. Therefore, by tightening the screw 52 to the side wall portion 54, the distal end surface of the screw 52 is brought into contact with the surface 44 b of the distal end member 44, and the distal end member 44 is pressed in the width direction X.

  Note that the screws 51 and 52 are screwed into the screw holes in advance and tightened into the screw holes, or the screws 51 and 52 themselves are tightened while being screwed (so-called self-tapping) (hereinafter referred to as “self-tapping”). The same applies to the other screws). Further, in order to fix the screws 51 and 52 to the main body 5, an adhesive may be applied so that the heads of the screws 51 and 52 are covered.

  FIG. 7 is a front view of a main part of the lens barrel of FIG. As shown in FIG. 7, the lens barrel 2 includes a leaf spring 55. The leaf spring 55 has a cross-sectional shape bent substantially in an L shape, and urges the tip member 44 in each of the width direction X and the height direction Z. Specifically, the leaf spring 55 is interposed between the surface 44c and the recess 45 of the tip member 44 and between the surface 44d and the recess 45, and the surface 44c is urged in the width direction X. At the same time, the surface 44d is urged in the height direction Z.

  Next, adjustment of the optical axis L2 in the lens barrel 2 of the imaging device 1 will be described. In the lens barrel 2, for example, in a manufacturing / assembly process, while observing an image picked up by the image pickup device 3, the tightening degree of the screws 51 and 52 is adjusted so that the image is optimized, thereby guiding the guide shaft. 14 is moved. Then, the concave portion 45 is filled with an adhesive from a filling port (not shown), and the guide shaft 14 is fixed.

  Regarding the movement of the guide shaft 14, specifically, when the screw 51 is tightened, the screw 51 is moved toward the tip member 44, and the surface 44 a of the tip member 44 is pressed in the axis G direction by the screw 51. . At this time, since the tip member 44 and the main body portion 5 are in contact with each other via the inclined surface S, the tip member 44 is moved so as to be guided (slid) by the inclined surface S. Therefore, the tip member 44 is moved in the height direction Z in the direction from the front side to the back side (the direction of arrow A1 in FIG. 5, the first direction).

  On the other hand, when the screw 51 is loosened, the screw 51 is moved away from the tip member 44. At this time, the shaft body 41 is biased forward in the direction of the axis G by the coil spring 43 and the tip member 44 is biased forward in the direction of the axis G, so that the tip member 44 is guided to the inclined surface S. Moved to. Therefore, the tip member 44 is moved in the direction from the back side to the front side in the height direction Z (the direction of the arrow A2 in FIG. 5).

  Further, when the screw 52 is tightened, the screw 52 is moved toward the tip member 44, the surface 44b of the tip member 44 is pressed by the screw 52, and the same direction as the screwing direction of the screw 52 (in FIG. 3). The tip member 44 is moved in the direction indicated by arrow B1 in FIG. On the other hand, when the screw 52 is loosened, the screw 52 is moved away from the tip member 44. At this time, since the surface 44c of the tip member 44 is urged by the leaf spring 55, the tip member 44 is moved in a direction (arrow B2 direction) opposite to the screwing direction of the screw 52.

  Therefore, by adjusting the tightening degree of the screws 51 and 52, the guide shaft 14 is moved so as to be inclined with respect to the base end portion 41a of the shaft body 41, and the captured image becomes an optimum one. The optical axis L2 is adjusted as desired.

  As described above, according to the present embodiment, the positions of the guide shaft 14 in the height direction Z (arrow A1, A2 direction) and the width direction X (arrow B1, B2 direction) can be independently adjusted. The axis L2 can be adjusted with high accuracy.

  In the present embodiment, as described above, the tip member 44 pressed to the rear side in the axis G direction by the screw 51 or biased to the front side in the axis G direction by the coil spring 43 is guided to the inclined surface S. And moved in the height direction Z. On the other hand, the tip member 44 pressed in the arrow B1 direction by the screw 52 or biased in the arrow B2 direction by the leaf spring 55 is moved in the width direction X. Therefore, the above-mentioned effect of adjusting the height direction Z and the width direction X position of the guide shaft 14 independently can be preferably exhibited.

  Furthermore, as described above, the screw 51 is screwed to the main body portion 5 of the housing 4 in the axis G direction, and the screw 52 is screwed to the main body portion 5 of the housing 4 in the width direction X. The restrictions on the configuration in the height direction Z (for example, securing the screw length for screwing the screws 51 and 52, etc.) are reduced, and the housing 4 can be made thinner.

  In the present embodiment, as described above, the guide shaft 14 has the tip member 44, and the tip member 44 is formed with the inclined surface S1. Therefore, compared with the case where the inclined surface S1 is directly formed on the shaft body 41, the area of the inclined surface S can be sufficiently secured.

  In the present embodiment, as described above, the surface 44d of the tip member 44 is biased in the height direction Z by the leaf spring 55, so that the movement of the tip member 44 is positively guided by the inclined surface S. It becomes possible to make it.

  The lens barrel 2 of the present embodiment is configured such that the optical axis L2 of the optical axis L2 can be easily adjusted by adjusting the optical axis of the optical system of the shutter / zoom lens unit 12. Yes. That is, the guide shaft 14 guides the movement in the optical system having the highest contribution of adjustment of the optical axis L2. Further, in the lens barrel 2, the main body portion 5 is formed of resin, and the dimensional tolerance between the concave portion 42 of the main body portion 5 and the base end portion 41 a of the shaft body 41 is a fitting tolerance. An adverse effect on the optical axis adjustment due to tilting is suppressed.

  In the above, the coil spring 43 constitutes the first urging member, and the portion of the leaf spring 55 that urges the surface 44c of the tip member 44 in the width direction X constitutes the second urging member.

  Next, a second embodiment of the imaging device according to the present invention will be described. In the following description, the same description as in the above embodiment is omitted, and different points are mainly described.

  8 is a perspective view of the first embodiment of the imaging apparatus according to the present invention, FIG. 9 is an internal configuration diagram corresponding to FIG. 3 of the imaging apparatus of FIG. 8, and FIG. 10 corresponds to FIG. 5 of the imaging apparatus of FIG. FIG. 11 is a partial cross-sectional view, FIG. 11 is a perspective view showing the main part of the lens barrel in the imaging apparatus of FIG. 8, and FIG. 12 is a front view of the main part of the lens barrel of FIG. As shown in FIG. 8, the lens barrel 70 of the imaging device 60 of the present embodiment is different from the lens barrel 2 of the imaging device 1 in that screws 61 and 62 are provided instead of the screws 51 and 52. 11, a tip member 63 is provided instead of the tip member 44.

  The distal end member 63 is fixed to the distal end portion 41 b of the shaft body 41 and constitutes the distal end portion (the other end portion) of the guide shaft 14. The tip member 63 and its outer shape have a substantially cubic shape. As shown in FIGS. 10 and 12, an inclined surface S <b> 3 for contacting the screw (first pressing member) 61 is provided on the distal end side of the distal end member 63. Further, as shown in FIGS. 9 and 12, an inclined surface S4 that intersects with the inclined surface S3 is formed on the distal end side of the distal end member 63 as a contact with the screw (second pressing member) 62. ing.

  As shown in FIGS. 9 and 10, the tip member 63 is accommodated in the recess 65 with the inclined surface S3 on the bottom wall 5e side and the inclined surface S4 on the opening 5b side. The concave portion 65 is a hollow having a cubic shape and opening rearward, and is provided in the main body portion 5 closer to the opening portion 5 b than the prism 8.

  As shown in FIG. 10, the screw 61 includes a head portion 61a and a screw portion 61b. The head 61a has a truncated cone shape that narrows toward the tip side. A male screw is formed on the outer peripheral surface of the screw portion 61b.

  The screw 61 is screwed into the body portion 5 of the housing 4 in the direction of the axis G so that the outer peripheral surface S5 of the head portion 61a contacts the inclined surface S3 of the tip member 63. Specifically, the screw 61 is disposed in an opening 67 provided in the main body 5 and opening forward. Here, the opening 67 has a shape corresponding to the screw 61 in a part of the bottom wall portion 53 constituting the bottom surface of the recess 65 and the side wall portion 68 constituting the surface of the recess 65 on the bottom wall 5e side. It is formed so as to be cut out.

  The screw 61 is screwed in the direction of the axis G with a boss 64 provided on the bottom surface of the opening 67. Accordingly, by tightening the screw 61 to the boss 64, the screw 61 and the tip member 63 come into contact with each other via the inclined surface S10 (the outer peripheral surface S5 and the inclined surface S3) intersecting the axis G direction and the height direction Z. Then, the tip member 63 is pressed.

  As shown in FIG. 11, the screw 62 includes a head portion 62a and a screw portion 62b. The head 62a has a truncated cone shape that narrows toward the distal end side. A male screw is formed on the outer peripheral surface of the screw portion 62b.

  As shown in FIG. 9, the screw 62 is screwed into the body portion 5 of the housing 4 in the direction of the axis G so that the outer peripheral surface S6 of the head portion 62a contacts the inclined surface S4 of the tip member 63. Specifically, the screw 62 is disposed in an opening 66 provided in the main body 5 and opening forward. Here, the opening 66 is formed such that a part of the side wall portion 54 constituting the surface of the bottom wall portion 53 and the recess 65 on the opening portion 5 b side in the main body portion 5 is cut out in a shape corresponding to the screw 62. ing.

  The screw 62 is screwed to the bottom surface of the opening 66 in the direction of the axis G. As a result, by tightening the screw 62 to the bottom surface of the opening 66, the screw 62 and the tip member 63 are mutually connected via the inclined surface S20 (outer peripheral surface S6 and inclined surface S4) intersecting the axis G direction and the width direction X. The tip member 63 is pressed by contact.

  According to the imaging device 60, the tip member 63 pressed by the screw 61 or biased by the coil spring 43 and the leaf spring 55 is moved so as to be guided by the inclined surface S10 and moved in the height direction Z. Is done. The tip member 63 pressed by the screw 62 or biased by the coil spring 43 and the plate spring 55 is moved so as to be guided by the inclined surface S20 and moved in the width direction X.

  Therefore, also in this embodiment, there exists the said effect of adjusting each of the position of the height direction Z and the width direction X in the guide shaft 14 independently. Furthermore, in this embodiment, since each of the screws 61 and 62 is screwed to the housing 4 in the direction of the axis G, there are less restrictions on the configuration of the housing 4 in the height direction Z and the width direction X. 4 can be further reduced in thickness.

  A portion of the coil spring 43 and the plate spring 55 that urges the surface 44d of the tip member 63 in the height direction Z constitutes a first urging member, and the surface 44c of the tip member 63 of the coil spring 43 and the plate spring 55 is formed. The portion urging in the width direction X constitutes the second urging member.

  The present invention is not limited to the embodiment described above. For example, in the above-described embodiment, the tip members 44 and 63 are provided on the multi-end side of the guide shaft 14, but the tip member may not be provided. In this case, the other end side of the shaft body 41 is directly pressed and urged.

  In the above-described embodiment, the portion that urges the surface 44d of the tip members 44 and 63 in the height direction Z and the portion that urges the surface 44c of the tip members 44 and 63 in the width direction X are integrated. Although the leaf spring 55 is provided, a leaf spring in which these portions are separated may be provided. Further, an elastic body or the like may be used instead of the leaf spring 55 as long as it has an urging force.

  Further, each stepping motor 21, 24 is not limited to the case where it is indirectly attached to the housing 4 via the support member 18, and may be directly attached to the housing 4. The lens barrel 2 is not limited to the one to which the bending optical system is applied, and may be one to which a retractable optical system or the like is applied.

It is a perspective view of one embodiment of an imaging device concerning the present invention. It is a disassembled perspective view of the imaging device of FIG. It is an internal block diagram of the imaging device of FIG. It is a perspective view of the drive unit of the imaging device of FIG. FIG. 5 is a partial cross-sectional view taken along line VV in FIG. 3. It is a perspective view which shows the principal part of the lens barrel in the imaging device of FIG. It is a front view of the principal part of the lens barrel of FIG. 1 is a perspective view of a first embodiment of an imaging apparatus according to the present invention. It is an internal block diagram corresponding to FIG. 3 of the imaging device of FIG. FIG. 9 is a partial cross-sectional view corresponding to FIG. 5 of the imaging device of FIG. 8. It is a perspective view which shows the principal part of the lens barrel in the imaging device of FIG. It is a front view of the principal part of the lens barrel of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,60 ... Imaging device, 2,70 ... Lens barrel, 3 ... Imaging element, 4 ... Housing, 12 ... Shutter / zoom lens unit (lens, lens frame), 14 ... Guide shaft, 41a ... Base end (guide) One end of the shaft), 43... Coil spring (first urging member, second urging member), 44, 63... Tip member (the other end of the guide shaft), 51, 61. Members), 52, 62 ... screws (second pressing member), 55 ... leaf springs (first urging member, second urging member), G ... axis of the guide shaft, L2 ... optical axis, S, S10, S20 ... inclined surfaces.

Claims (4)

A lens frame that holds the lens; a guide shaft that guides the movement of the lens frame so that the lens moves along the optical axis direction; and a housing that houses the lens frame and supports one end of the guide shaft. A lens barrel comprising:
A first pressing member that is screwed into the housing and presses the other end so that the other end of the guide shaft moves in a first direction that intersects the axial direction of the guide shaft;
A second pressing member that is screwed into the housing and presses the other end so that the other end moves in a second direction intersecting the axial direction;
A first biasing member that biases the other end in a direction opposite to the pressing direction of the first pressing member;
And a second urging member that urges the other end in a direction opposite to the pressing direction of the second pressing member. The first pressing member is screwed into the housing in the axial direction, presses the other end portion in the axial direction,
The second pressing member is screwed into the housing in the second direction, presses the other end portion in the second direction,
The lens barrel according to claim 1, wherein the other end and the housing are in contact with each other via an inclined surface intersecting the axial direction and the first direction. Each of the first and second pressing members is screwed into the housing in the axial direction, and presses the other end.
The first pressing member and the other end are in contact with each other via an inclined surface intersecting the axial direction and the first direction,
The lens barrel according to claim 1, wherein the second pressing member and the other end are in contact with each other via an inclined surface that intersects the axial direction and the second direction. The lens barrel according to any one of claims 1 to 3,
An imaging device comprising: an imaging element that detects light imaged by the lens.

Images