JP5621609B2 - Tilt adjustment mechanism - Google Patents

Description

  The present invention relates to a tilt adjustment mechanism that enables tilt adjustment of an image sensor.

  2. Description of the Related Art In recent years, a photographing apparatus such as a digital camera is required to be downsized and a high quality of a captured image. Here, in order to satisfy the demand for higher image quality, it is desirable to provide an image sensor at a position where a subject image formed by the photographing optical system is appropriately acquired. For this reason, a reference plane for the imaging optical system is set in the housing, and the position of the imaging element in the imaging optical axis direction of the imaging optical system is adjusted and the imaging is performed so that the imaging plane of the imaging element matches the reference plane. The so-called tilt adjustment of the image sensor for adjusting the tilt of the image sensor with respect to the optical axis direction is performed with high accuracy. In order to perform this tilt adjustment, it is known that the image pickup device is supported at three points in the housing, and the support points can be adjusted in the direction of the photographing optical axis.

  As such a configuration, an attachment angle adjustment mechanism is conceivable in which a plate-like image sensor holding member on which an image sensor is mounted is attached to an image sensor holding frame of a lens barrel so that the angle can be adjusted (Patent Document 1). reference). In this attachment angle adjusting mechanism, the image sensor holding member is provided with three screw holes surrounding the image sensor, a leaf spring formed by cutting and raising the vicinity thereof, and two guide through holes. The image sensor holding member is positioned in a direction orthogonal to the imaging optical axis by inserting two guide projections of the image sensor holding frame into the guide through holes, and three leaf spring portions are attached to the image sensor holding frame. While being pressed, it is screwed to the image sensor holding frame with an adjusting screw that has passed through three screw holes. In this mounting angle adjusting mechanism, the mounting angle of the image sensor holding member with respect to the image sensor holding member can be adjusted by adjusting the screwing amount of each adjustment screw to the image sensor holding member. Work can be made easy.

  However, in the conventional attachment angle adjusting mechanism described above, the three leaf springs that urge the imaging element holding member away from the imaging element holding frame are formed by cutting and raising the imaging element holding member. Each leaf spring also applies an urging force in a direction perpendicular to the photographic optical axis when the urging force in the photographic optical axis direction (a direction away from the imaging element holding frame) is applied to the image sensor holding member. It will be. For this reason, there exists a possibility that the position in the direction orthogonal to the imaging | photography optical axis of an image pick-up element may change from a predetermined state. Even if such a change can be prevented by inserting the guide through hole and the guide projection in the direction of the photographing optical axis, the guide projection is in the direction perpendicular to the photographing optical axis. By being pressed against the inner peripheral surface of the guide through-hole, it may be difficult to displace the image sensor holding member in the direction of the photographic optical axis with each adjustment screw.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a tilt adjustment mechanism that can easily and accurately adjust the tilt of an image sensor.

  The tilt adjustment mechanism according to claim 1 is configured so that an imaging surface of an imaging element that acquires a subject image formed by the imaging optical system matches a reference plane set in a housing with respect to the imaging optical system. A tilt adjustment mechanism for holding the image sensor so that the tilt relative to the housing can be changed, the image sensor holding plate for holding the image sensor, and the displacement adjustable in an adjustment direction orthogonal to the reference plane And at least three support members having cam surfaces that form support points for supporting the image sensor holding plate, wherein the cam surfaces are inclined with respect to the reference surface, and each of the support members is disposed on the reference surface. The image pickup device surrounds the image pickup device when viewed along the direction, and is provided with an inclination direction of the cam surface at a support point with respect to the image pickup device holding plate directed toward the image pickup device.

  The tilt adjustment mechanism according to claim 2, wherein the imaging surface of an imaging device that acquires a subject image formed by the imaging optical system matches the reference plane set in the housing with respect to the imaging optical system. A tilt adjustment mechanism for holding the image sensor so that the tilt relative to the housing can be changed, the image sensor holding plate for holding the image sensor, and the displacement adjustable in an adjustment direction orthogonal to the reference plane At least three support members having cam surfaces that form support points for supporting the image sensor holding plate, wherein the cam surfaces are inclined with respect to the reference surface, and the support members are arranged on the cam surfaces. Accordingly, any one of the supported points of the image sensor holding plate at each supported point in terms of the component in the direction along the reference plane in the pressing force to the image sensor holding plate acting in the inclination direction of the cam surface. Acts on supported points The respective inclination directions are set so that the combined component of the pressing force acting on the remaining supported points at each supported point of the image sensor holding plate cancels each other against the pressing force to be canceled. And

  A tilt adjustment mechanism according to a third aspect is the tilt adjustment mechanism according to the first or second aspect, wherein each of the cam surfaces is formed by a single inclined surface.

  A tilt adjustment mechanism according to a fourth aspect of the present invention is the tilt adjustment mechanism according to any one of the first to third aspects, wherein each of the support members is rotated about an axis along the adjustment direction in the casing. The cam surfaces are spiral planes that are inclined with respect to the adjustment direction.

  A tilt adjustment mechanism according to a fifth aspect of the present invention is the tilt adjustment mechanism according to any one of the first to fourth aspects, wherein the image sensor holding plate and each cam surface are further moved in the adjustment direction. And an urging means for applying an urging force to press contact to either the image sensor holding plate or each of the cam surfaces.

  A tilt adjustment mechanism according to a sixth aspect is the tilt adjustment mechanism according to the fifth aspect, wherein the urging means is a leaf spring.

  A tilt adjustment mechanism according to a seventh aspect is the tilt adjustment mechanism according to the fifth or sixth aspect, wherein the biasing means is provided corresponding to each of the support members individually. Features.

  The tilt adjustment mechanism according to an eighth aspect of the present invention is the tilt adjustment mechanism according to the seventh aspect, wherein each of the urging means is attached to adjust a pressing force at each supported point of the image sensor holding plate. It is characterized by the fact that power is set.

  The tilt adjustment mechanism according to claim 9 is the tilt adjustment mechanism according to any one of claims 1 to 8, wherein each of the cam surfaces is at each supported point of the image sensor holding plate. An inclination angle is set in order to adjust the pressing force.

  The tilt adjustment mechanism according to a tenth aspect is the tilt adjustment mechanism according to any one of the first to ninth aspects, wherein each of the support members is at each supported point of the image sensor holding plate. In order to adjust the pressing force, an arrangement position viewed in a direction along the reference plane is set.

  The tilt adjustment mechanism according to claim 11 is the tilt adjustment mechanism according to any one of claims 1 to 10, wherein the support member is formed of a sintered material. To do.

  The tilt adjustment mechanism according to claim 12 is the tilt adjustment mechanism according to any one of claims 1 to 10, wherein the support member is formed by a die casting method. .

  An image pickup apparatus according to a thirteenth aspect includes the tilt adjustment mechanism according to any one of the first to twelfth aspects.

  In the tilt adjustment mechanism according to the present invention, the pressing force acting on each supported point of the image sensor holding plate due to the cam surface can be canceled out, so that the image sensor holding plate is moved in a direction orthogonal to the adjustment direction. The force acting so as to press can be made extremely small. For this reason, it is possible to prevent the image sensor from being displaced in the direction along the reference plane.

  In addition, since the pressing forces can be canceled with each other, the force acting to press the image sensor holding plate in the direction orthogonal to the adjustment direction can be made extremely small. For example, the image sensor holding plate Even when the movement in the direction orthogonal to the adjustment direction is restricted by engagement, it is possible to prevent a large frictional force from being generated at the engagement portion. Therefore, the image sensor holding plate can be easily displaced in the adjustment direction, and the tilt adjustment of the image sensor can be facilitated.

  Further, each supported portion of the image sensor holding plate is supported by a cam surface inclined with respect to the reference surface, and the support position in the adjustment direction is changed by changing the contact position on the cam surface. Therefore, the support position of the image sensor holding plate in the adjustment direction can be changed minutely, so that the tilt adjustment of the image sensor can be performed with high accuracy.

  In addition to the above-described configuration, assuming that each cam surface is formed by a single inclined surface, in the adjustment direction of each support point with respect to the change in the contact position of the cam surface with the image sensor holding plate. Since the change can be continuous, the tilt adjustment of the image sensor can be performed more easily and with high accuracy.

  In addition to the above-described configuration, each support member is provided on the housing so as to be rotatable about an axis line along the adjustment direction, and each cam surface is a spiral plane inclined with respect to the adjustment direction. If it exists, the support position in the adjustment direction can be changed by rotating the support member around the axis. For this reason, it is possible to make a gradual change while minimizing the amount of change in the adjustment direction of each support point with respect to the rotation operation amount of the support member while making the configuration smaller and simpler, with higher accuracy. Tilt adjustment of the image sensor can be performed.

  In addition to the above-described configuration, the urging force is further applied to one of the image sensor holding plate and each cam surface that presses the image sensor holding plate and each cam surface in the adjustment direction. By providing the means, the position of each support point in the adjustment direction with respect to the image sensor holding plate can be adjusted more appropriately, and the tilt adjustment of the image sensor can be performed with higher accuracy.

  In addition to the above-described configuration, if the urging means is a leaf spring, each supported portion of the image sensor holding plate is connected to the cam surface of the support member without increasing the size in the adjustment direction. It is possible to press (pressure contact) more appropriately. For this reason, the tilt adjustment of the image sensor can be performed with higher accuracy.

  In addition to the above-described configuration, if the urging means is provided corresponding to each support member individually, each supported portion of the image sensor holding plate is more appropriately moved to the cam surface of the support member. Can be pressed (pressure contact). For this reason, the tilt adjustment of the image sensor can be performed with higher accuracy.

  In addition to the above-described configuration, if each biasing means is set to have a biasing force to adjust the pressing force at each supported point of the image sensor holding plate, The pressing forces acting in the direction perpendicular to the adjustment direction at the support points can be more effectively canceled out from each other.

  In addition to the above-described configuration, if each cam surface has an inclination angle to adjust the pressing force at each supported point of the image sensor holding plate, each supported surface of the image sensor holding plate The pressing forces acting in the direction perpendicular to the adjustment direction at the points can be more effectively canceled out from each other.

  In addition to the above-described configuration, each support member has an arrangement position viewed in the direction along the reference plane so as to adjust the pressing force at each supported point of the image sensor holding plate. The pressing forces acting in the direction orthogonal to the adjustment direction at each supported point of the image sensor holding plate can be more effectively canceled out from each other.

  In addition to the above-described configuration, if the support member is formed of a sintered material, the cam surface can be formed with high accuracy, and deformation with respect to a temperature change can be extremely small. Therefore, the tilt adjustment of the image sensor can be performed with higher accuracy.

  In addition to the above-described configuration, if the support member is formed by a die casting method, the cam surface can be formed with high accuracy, and deformation with respect to a temperature change can be extremely small. Thus, the tilt adjustment of the image sensor can be performed with higher accuracy.

It is explanatory drawing which shows schematic structure of the digital camera 10 carrying the tilt adjustment mechanism 50 as an example which concerns on this invention. In order to explain the configuration of the tilt adjustment mechanism 50, it is an explanatory view of the housing part 39A viewed from the back side (the back side 11b side of the image sensor 11). It is a typical perspective view which shows a mode that the holding plate 52 hold | maintains the image pick-up element 11 and the board | substrate 51 integrally. It is sectional drawing obtained along the II line | wire shown in FIG. It is a perspective view which shows typically the support structure with respect to the 2nd to-be-supported part 52b2. It is sectional drawing obtained along the II-II line | wire shown in FIG. 5 is a schematic perspective view for explaining a configuration of a support member 55. FIG. It is explanatory drawing for demonstrating a mode that pressing force P acts on the 2nd to-be-supported part 52b2 on the adjustment cam surface 55c. In FIG. 2 excluding the urging plate spring 56, the coil spring 57, and the stepped screw 58, the pressing force P1, which is an orthogonal component of the pressing force P acting on the supported portion 52f of the first supported portion 52b1, The orthogonality of the pressing force P2 that is the orthogonal component of the pressing force P acting on the supported location 52f of the second supported portion 52b2 and the pressing force P that acts on the supported location 52f of the third supported portion 52b3 It is explanatory drawing which shows the pressing force P3 which is a component with the action direction. In order to schematically show the holding plate 52 and to cancel each other, the orthogonal components of the pressing forces P acting on the three supported points in the inclined direction at the respective supporting points are changed to the respective pressing forces P1, P2, It is explanatory drawing represented by P3, (a) shows another example, (b) shows an example different from other (a), (c) shows other (a) and (b) Shows a different example, and (d) shows an example different from the other (a), (b), and (c).

  The tilt adjusting mechanism according to the present invention will be described below with reference to the drawings.

  A configuration of a tilt adjustment mechanism 50 which is an embodiment of the tilt adjustment mechanism according to the present invention will be described with reference to FIGS. First, the digital camera 10 equipped with the tilt adjustment mechanism 50 will be described with reference to FIG. FIG. 1 is an explanatory diagram showing a schematic configuration of the digital camera 10. As shown in FIG. 1, the digital camera 10 includes an interchangeable lens unit 40 (imaging optical system) that can be attached to and detached from a camera body (main body unit) 39 (a casing unit 39A (see FIG. 2, etc.) described later). The image to be photographed, that is, the image of the subject, is read by the image sensor 11 and appropriately processed. In addition to the image sensor 11, the digital camera 10 includes a CDS circuit 12, an A / D conversion unit 13, a digital signal processing circuit 14, a compression / decompression circuit 15, a DRAM 16, a memory card 17, an SG unit 18, a CPU 19, a microphone 20, and an amplifier. Filter unit 21, A / D conversion unit 22, audio data compression / decompression circuit 23, D / A conversion unit 24, amplifier / filter unit 25, OSD 26, RAM 27, CPU bus 28, DC / DC converter 29, power supply 30, focal A plane shutter 31 is provided.

  The imaging device 11 is configured using a CCD (charge coupled device) or the like, and converts a subject image input via the interchangeable lens unit 40 and the focal plane shutter 31 into an electrical signal (analog image data). Output to the CDS circuit 12. The CDS circuit 12 is a correlated double sampling circuit, and reduces noise of the input electric signal and outputs it to the A / D converter 13. The A / D converter 13 converts the electrical signal whose noise has been reduced by the CDS circuit 12 into a digital signal (digital image) at an optimum sampling frequency (for example, an integer multiple of the subcarrier frequency of the NTSC (National Television System Committee) signal). Data). The digital image data converted by the A / D converter 13 is output to the digital signal processing circuit 14 although it is not clearly shown.

  The digital signal processing circuit 14 divides the digital image data from the A / D converter 13 into luminance data and color difference data, and performs data processing for γ (gamma) correction and image compression / decompression. This processed digital image data is displayed on an LCD (Liquid Crystal Display) 32 and an EVF (Electronic View Finder) 33. On the LCD 32 and the EVF 33, an OSD display screen (on-screen display) generated by the OSD 26 is appropriately displayed.

  The compression / decompression circuit 15 conforms to the JPEG format, and compresses digital image data by orthogonal transform / Huffman coding or decompresses it by Huffman decoding / inverse orthogonal transform.

  The DRAM 16 temporarily stores the compressed digital image data. The digital image data compressed in this way is stored (recorded) in the memory card 17 inserted in the card slot 34 as an image data file. In addition, the memory card 17 stores (records) digital audio data that has been compressed, which will be described later, as an audio data file.

  The SG unit 18 is a control signal generation unit, and cooperates with the CPU 19 to provide timing signals to the image sensor 11, the CDS circuit 12, and the A / D conversion unit 13, respectively, and appropriately synchronize them.

  The CPU 19 includes a RAM 27 and is connected to the digital signal processing circuit 14, the DRAM 16, the memory card 17, and the like via a CPU bus 28. Further, the CPU 19 responds to an instruction by an operation performed on the operation unit 35, the release button 36, and the zoom button 37 provided to be operable on the digital camera 10 or an operation instruction from the outside such as a remote controller (not shown). Control of the operation of each part of the digital camera 10 is comprehensively performed by a program stored in a ROM (not shown). The control of the operation of each unit includes, for example, control of recording operation of digital image data and digital audio data to the memory card 17, control of reproduction operation of digital image data and digital audio data recorded on the memory card 17, For example, drive control of the OSD 26 and the strobe 38 is performed.

  The microphone 20, the amplifier / filter unit 21, the A / D conversion unit 22, the audio data compression / decompression circuit 23, the D / A conversion unit 24, and the amplifier / filter unit 25 constitute a signal processing unit related to audio. Although not shown, the microphone 20 includes a conversion element that converts sound (voice) into an electrical signal. The microphone 20 converts the input sound into an electric signal (analog audio data) and outputs it to the amplifier / filter unit 21. The amplifier / filter unit 21 amplifies the input electric signal, cuts it off to a necessary band, and outputs it to the A / D conversion unit 22. The A / D converter 22 converts it into digital audio data at a sampling frequency that is twice or more the predetermined band, and outputs it to the audio data compression / decompression circuit 23. The audio data compression / decompression circuit 23 performs compression / encoding processing and appropriately records (stores) it in the memory card 17 or the like. The digital audio data recorded (stored) in the memory card 17 or the like is converted into an electric signal (analog audio data) by the D / A converter 24, amplified by the amplifier / filter unit 25, and audio not shown. It is output as sound (voice) through the output unit (speaker).

  Each part of the digital camera 10 is appropriately supplied with power from a power supply 30 via a DC / DC converter 29. The DC / DC converter 29 transforms the input voltage from the power supply 30.

  The imaging optical system that forms a subject image on the imaging device 11 (its imaging surface 11a) is, as described above, a housing portion 39A that constitutes a part of the camera body 39 of the digital camera 10 (see FIG. 2 and the like). It is comprised as the interchangeable lens part 40 made detachable with respect to. The interchangeable lens unit 40 is configured by accommodating an optical element group 41 composed of a plurality of optical elements in a lens group holding structure 42. In this embodiment, the optical element group 41 is formed of a plurality of optical elements (lenses, diaphragms, etc.) along the photographing optical axis OA from the objective lens located closest to the subject (object). In this specification, the optical axis in the imaging optical system, that is, the rotationally symmetric axis of each optical element serving as the center axis position of the optical element group 41 (lens group holding structure 42) is defined as the imaging optical system, that is, the digital camera 10. It is assumed that the photographing optical axis OA.

  The lens group holding structure 42 holds the optical element group 41 so as to be movable along the photographing optical axis OA. The lens group holding structure 42 is provided with a focus ring 43 and an aperture ring 44. The focus ring 43 can be rotated for focusing (focusing), and the position of each optical element in the optical element group 41 on the photographic optical axis OA is appropriately changed according to the change in the rotation posture. It is supposed to be configured. The aperture ring 44 can be rotated to adjust the amount of light, and is configured to appropriately change the aperture (not shown) of the optical element group 41 in accordance with a change in the rotation posture.

  Next, the configuration of the tilt adjustment mechanism 50 in the digital camera 10 will be described in detail with reference to FIGS. The tilt adjustment mechanism 50 is perpendicular to the reference plane Bp in order to adjust the tilt of the image sensor 11, that is, to align the imaging surface 11a of the image sensor 11 with a set reference surface (reference position) Bp (see FIG. 1). The position of the image sensor 11 in the direction and the inclination of the image sensor 11 with respect to the direction can be adjusted. For this reason, the direction orthogonal to the reference plane Bp is the adjustment direction (see symbol AD in FIG. 3 and the like). The reference plane Bp (see FIG. 1) is set in the camera body 39 (see FIG. 1) of the digital camera 10 according to the optical characteristics of the photographing optical system (interchangeable lens unit 40). It is orthogonal to the optical axis OA direction. For this reason, the adjustment direction is parallel to the photographing optical axis OA direction. In the following, the adjustment direction is indicated by a reference symbol AD attached to an arrow directed to the subject side in the same manner as the photographing optical axis OA. In the present embodiment, as described above, since the photographing optical system is configured by the interchangeable lens unit 40 that can be attached to and detached from the camera body 39 in the digital camera 10, the reference plane Bp is that of the camera body 39. Among them, in the housing part 39A constituting the surface (mounting surface (not shown)) to which the interchangeable lens unit 40 is attached, it is set parallel to the mounting surface so as to be spaced from the mounting surface. Yes. For this reason, the tilt adjustment of the image sensor 11 is also referred to as flange back adjustment. Although not shown in the figure, the housing portion 39A can form a camera body 39 (see FIG. 1) in cooperation with other housing portions.

  In the tilt adjusting mechanism 50, as shown in FIGS. 2 to 4, the image pickup device 11 is held by a holding plate 52, and the holding plate 52 can be displaced in the adjustment direction AD with respect to the housing portion 39A. It is supported through two support points (locations where the supported location 52f is in contact with an adjustment cam surface 55c (see FIG. 5 and the like) described later). The imaging element 11 is electrically connected (mounted) to the substrate 51 as shown in FIGS. A plurality of electronic components such as capacitors and resistors are mounted on the substrate 51, and each of the above-described components (electronic circuits (FIG. 1) together with a main substrate (not shown) electrically connected via the connector 51a. See)). The substrate 51 is provided with a mounting opening 51b at a position facing the back surface 11b of the mounted image pickup device 11 (the surface opposite to the image pickup surface 11a (the back surface of the package portion constituting the image pickup device 11)). Yes. The mounting opening 51b is configured to bring each adhesive portion 52a (described later) of the holding plate 52 into contact with the back surface 11b of the image sensor 11 from the back surface side of the substrate 51 (the side opposite to the surface on which the image sensor 11 is mounted). It is possible.

  As shown in FIGS. 3 and 4, the holding plate 52 has a flat plate shape as a whole, and is formed of a material having at least higher strength than the substrate 51 and having thermal conductivity in this embodiment. . The holding plate 52 includes two adhesive portions 52a, three supported portions 52b, two reference holes 52c, and three rotation restricting portions 52d.

  The two bonding portions 52a are formed by being bent and deformed so that the central portion of the holding plate 52 is shifted to the front side. When the holding plate 52 is disposed on the back surface side of the substrate 51, the two bonding portions 52a are formed from the mounting openings 51b. It is possible to address the back surface 11b of the imaging element 11. Each adhesive portion 52a is formed with an adhesive convex portion 52e that is a portion that comes into surface contact with the back surface 11b. The adhesive convex portion 52e is formed by being bent and deformed so that the adhesive portion 52a is partially shifted to the front side. In this embodiment, two adhesive convex portions 52e are provided at both end positions of the upper adhesive portion 52a. One adhesive convex part 52e is provided in the lower adhesive part 52a. Each adhesion part 52a is addressed to the back surface 11b of the image sensor 11 through the attachment opening 51b, and each adhesion convex part 52e is adhered to the back surface 11b, thereby being attached to the image sensor 11. Thereby, the holding plate 52 can hold the image sensor 11 integrally with the substrate 51 on which the image sensor 11 is mounted.

  The three supported portions 52b of the holding plate 52 are locations supported by the housing portion 39A. In the present embodiment, each of the supported portions 52b is viewed in a direction orthogonal to the adjustment direction AD (a direction along the reference surface Bp (a surface parallel to the reference surface Bp)). Are formed at three locations so as to surround the outer periphery of the outer periphery of the substrate, and a supported portion 52f that abuts an adjustment cam surface 55c, which will be described later, is formed at the edge. One of the supported portions 52b (hereinafter, also referred to as a first supported portion 52b1 when individually described) extends in one direction from the central portion of the holding plate 52 while maintaining a flat state. The remaining two supported portions 52b (hereinafter, one is also referred to as a second supported portion 52b2 and the other is also referred to as a third supported portion 52b3) are flat from the central portion of the holding plate 52. After extending in the other direction opposite to the first supported portion 52b1 while maintaining the state, it is extended to both sides in the direction orthogonal to the extending direction while maintaining the flat state. . For this reason, in this embodiment, the three supported portions 52b are located on the same plane.

  The two reference holes 52c of the holding plate 52 are through holes provided for positioning the holding plate 52 with respect to the housing portion 39A. In the present embodiment, one reference hole 52c is provided in the first supported portion 52b1, and the other reference hole 52c is provided in the third supported portion 52b3. The two reference holes 52c can be inserted into the positioning protrusion 39Aa and the positioning protrusion 39Ab (see FIG. 2) of the housing portion 39A. The positioning protrusions 39Aa and the positioning protrusions 39Ab have a rod shape extending in the adjustment direction AD from the housing portion 39A toward the rear side (the side opposite to the side on which the interchangeable lens portion 40 is attached). For this reason, the two reference holes 52c are viewed in a direction (a direction along the reference plane Bp) perpendicular to the adjustment direction AD with respect to the housing portion 39A by inserting the corresponding positioning protrusion 39Aa or positioning protrusion 39Ab. The position of the holding plate 52 is defined. In this embodiment, the reference hole 52c located in the vicinity of the third supported portion 52b3 has an inner diameter dimension that is larger in one direction than the outer diameter dimension of the elongated hole, that is, the positioning protrusion 39Ab. The degree of freedom of the insertion position of the protrusion 39Ab, that is, the adjustment margin of the holding plate 52 is secured.

  The three rotation restricting portions 52d of the holding plate 52 prevent rotation of an urging plate spring 56 described later. In the present embodiment, each rotation restricting portion 52d is provided one by one corresponding to each supported portion 52b, and the corresponding supported portion 52b is located behind the holding plate 52 (the side on which the substrate 51 is provided). Is in the shape of a column protruding on the opposite side.

  A heat transfer member 53 is attached to the holding plate 52. The heat transfer member 53 is formed of a material having thermal conductivity, and one end thereof is fixed to the holding plate 52 by a screwing member 53a (see FIG. 2). Although not shown, the heat transfer member 53 has the other end at the camera body 39 (see FIG. 1) in which the image pickup device 11 and the substrate 51 held by the holding plate 52 are accommodated in the camera body 39 (see FIG. 1). It is supposed that it abuts on a part of 39 so that heat can be transferred. For this reason, the heat transfer member 53 can connect the image pickup device 11 held there and the camera body 39 via the holding plate 52 so as to be able to transfer heat, and releases the heat generated from the image pickup device 11. be able to.

  In the tilt adjustment mechanism 50, the three supported portions 52b (the supported portions 52f) of the holding plate 52 are held by the holding plate 52 by supporting the housing portion 39A so as to be displaceable in the adjustment direction AD. The tilt adjustment of the image sensor 11 can be performed. Since the structure for the displaceable support is basically the same as that of the three supported portions 52b (the supported portions 52f), hereinafter, in the second supported portion 52b2. The support structure will be described with reference to FIGS. 5 and 6 and the other support structures will be omitted. FIG. 5 is a perspective view schematically showing a support structure for the second supported portion 52b2, and FIG. 6 is a cross-sectional view obtained along the line II-II in FIG.

  As shown in FIGS. 5 and 6, the support structure for the second supported portion 52 b 2 in the tilt adjustment mechanism 50 includes a boss portion 54, a support member 55 and an urging plate spring 56, and a stepped screw via a coil spring 57. 58 is attached.

  The boss portion 54 is formed so as to protrude from the housing portion 39A to the back surface side, and the protruding end is a flat installation surface 54a. A screwing hole 54b is provided at the center of the installation surface 54a. In the present embodiment, the installation surface 54a is a plane orthogonal to the adjustment direction AD. Although not shown, the installation surface 54a is on the same plane as the installation surface of each boss portion in other support structures as viewed in the adjustment direction AD. Is set to be located. The screw hole 54b is formed by providing a screw groove on the inner peripheral wall surface of the hole extending in the direction orthogonal to the installation surface 54a, that is, in the adjustment direction AD. As will be described later, the screw hole 54b can be inserted by screwing the tip screw portion 58a of the stepped screw 58. A support member 55 is installed on the installation surface 54 a of the boss portion 54.

  As shown in FIG. 7, the support member 55 has a cylindrical shape as a whole, and is provided with a through hole 55a having an axis equal to the axis (hereinafter referred to as a central axis MA). In the support member 55, the lower surface is an installation flat surface 55b (see FIG. 6 and the like) that is a plane orthogonal to the central axis MA, and the upper surface is an adjustment cam surface 55c. The adjustment cam surface 55c is viewed in the rotational direction about the central axis MA, and the height dimension viewed in the central axis MA direction, that is, the support member 55 viewed in the central axis MA direction with respect to the installation flat surface 55b. Is defined by a spiral plane so that the thickness dimension is continuously changed. In other words, the adjustment cam surface 55c is a single plane inclined with respect to the direction of the central axis MA, and is viewed in the distance from the installation flat surface 55b that is a plane orthogonal to the central axis MA, that is, in the direction of the central axis MA. The position is gradually changed. In this embodiment, in addition to the adjustment cam surface 55c, an upper flat surface 55d and a lower flat surface 55e are provided on the upper surface. The upper flat surface 55d has a central axis MA along the direction orthogonal to the central axis MA so as to maintain the height of one end that is the largest height when viewed in the direction of the central axis MA on the adjustment cam surface 55c. Is extended in the direction of rotation about the center. The lower flat surface 55e has a central axis line along a direction orthogonal to the central axis line MA so as to maintain the height dimension of the other end which is the smallest height dimension in the central axis line MA direction on the adjustment cam surface 55c. It extends in the direction of rotation about MA. Therefore, a vertical wall surface extending along the central axis MA is formed between the upper flat surface 55d and the lower flat surface 55e.

  Further, in the support member 55, a reduced diameter portion 55f is provided on the installation flat surface 55b side (lower surface side) of the through hole 55a. The reduced diameter portion 55f is formed to protrude inward with the central axis MA as the center so as to narrow the inner diameter of the through hole 55a. As will be described later, the through hole 55a has an inner diameter that allows the coil spring 57 to be inserted, and has an inner diameter that does not allow the coil spring 57 to be inserted in the reduced diameter portion 55f. For this reason, the upper end surface of the reduced diameter portion 55f functions as a spring engaging portion 55g in which the coil spring 57 can be engaged.

  The support member 55 is provided with an operation protrusion 55h on the outer peripheral surface. The operation protrusion 55h is a convex portion that can be engaged with a jig (tool (not shown)) for rotating the support member 55. In this embodiment, the operation protrusion 55h is formed on a plane perpendicular to the central axis MA. It extends in four directions perpendicular to each other. In addition, in the present embodiment, each operation projection 55h extends to an outer position than the installation surface 54a of the boss portion 54 when viewed in a direction orthogonal to the central axis MA, and is a jig for rotating operation. When a (tool (not shown)) is engaged from the direction of the central axis MA and engaged, the jig is prevented from interfering with the boss portion 54. In this embodiment, the support member 55 is formed as a sintered material (sintered product) by firing.

  In order to press the support member 55 toward the installation surface 54a of the boss portion 54, a coil spring 57 is provided as shown in FIGS. The coil spring 57 is set to have an outer diameter that allows the support member 55 to be inserted into the through hole 55a and cannot be inserted into the reduced diameter portion 55f formed therein. The coil spring 57 is set to have an inner diameter dimension that can surround a base end cylindrical portion 58b of a stepped screw 58 described later. As will be described later, when the coil spring 57 is rotated by engaging a jig (tool (not shown)) with each operation projection 55h, the coil spring 57 is supported on the installation surface 54a of the boss portion 54. Is set to a length dimension and a spring force that can be pressed toward the installation surface 54a so as to rotate stably. Here, the stable rotation means that the support member 55 rotates while maintaining the state where the installation surface 54a and the installation flat surface 55b are in surface contact.

  In order to attach the support member 55 to the boss portion 54 (its installation surface 54a), a stepped screw 58 is provided. The stepped screw 58 has a distal end screw portion 58a, a proximal end cylindrical portion 58b, and a head portion 58c. The tip screw portion 58a has a cylindrical shape with a thread groove provided on the outer peripheral surface, and can be screwed into the screw hole 54b of the boss portion 54. The proximal cylindrical portion 58b has a cylindrical shape with a larger outer diameter than the distal screw portion 58a, can be inserted inward of the coil spring 57, and is slidably fitted to the reduced diameter portion 55f of the support member 55. The outer diameter of the boss portion 54 cannot be inserted into the screw hole 54b. The head portion 58 c has a disk shape with a larger outer diameter than the base end cylindrical portion 58 b, and has an outer diameter that cannot be inserted into the coil spring 57.

  An urging plate spring 56 is provided on the base end cylindrical portion 58 b of the stepped screw 58. The urging plate spring 56 is provided to press (pressure contact) the second supported portion 52b2 (the supported location 52f) of the holding plate 52 against the adjustment cam surface 55c of the support member 55. The urging plate spring 56 has a plate shape formed of a material having elasticity, and includes a flat mounting base portion 56a and a pressing portion 56b that is continuous with the bending base portion 56b and is bent with respect to the mounting base portion 56a. The attachment base portion 56a can be brought into surface contact with the lower surface of the head portion 58c of the stepped screw 58 (the surface on the side where the proximal end cylindrical portion 58b extends), and is provided with an attachment hole 56c. The mounting hole 56c has an inner diameter dimension that allows the proximal cylindrical portion 58b of the stepped screw 58 to be inserted and does not allow the coil spring 57 and the head 58c of the stepped screw 58 to be inserted. For this reason, the attachment base portion 56a of the urging plate spring 56 is sandwiched between the coil spring 57 and the head portion 58c of the stepped screw 58 in a state where the base end cylindrical portion 58b of the stepped screw 58 is inserted into the attachment hole 56c. It is possible.

  The pressing portion 56b is formed such that the distal end portion is bent toward the other side after being bent toward one side (lower side in FIG. 6 when viewed from the front) with respect to the mounting base portion 56a. For this reason, the pressing portion 56b has a biasing force that displaces the bent portion 56d to the other side when the subsequent bent portion 56d is displaced from the unloaded state to the one side with respect to the mounting base 56a. It is possible to grant. The pressing portion 56b is provided with a notch 56e. The notch 56e is cut so as to penetrate the pressing portion 56b in the thickness direction so as to extend beyond the bending portion 56d from the extending end of the pressing portion 56b along the extending direction from the mounting base 56a. It is lacking. The notch 56e is set to a width dimension that allows the rotation restricting portion 52d of the holding plate 52 to be engaged.

  In the tilt adjusting mechanism 50, the support member 55 is disposed on the installation surface 54a of the boss portion 54 so as to face the installation flat surface 55b, and the coil spring 57 is disposed in the through hole 55a so as to be engaged with the spring engagement portion 55g. The mounting base portion 56 a of the urging plate spring 56 is provided on the coil spring 57. At this time, in the support member 55, the installation flat surface 55b is a plane orthogonal to the central axis MA, and the installation surface 54a of the boss portion 54 is a plane orthogonal to the adjustment direction AD. The central axis MA is along the adjustment direction AD. From the upper side of the urging plate spring 56 (mounting base portion 56a), the tip screw portion 58a of the stepped screw 58 is inserted into the mounting hole 56c of the mounting base portion 56a, the coil spring 57, and the reduced diameter portion 55f of the through hole 55a of the support member 55. The base end cylindrical portion 58 b is inserted, and the tip screw portion 58 a is screwed into the screw hole 54 b of the installation surface 54 a of the boss portion 54. At this time, the length dimension (interval) from the installation surface 54a of the boss portion 54 to the head portion 58c (the lower surface thereof) of the stepped screw 58 is determined between the tip screw portion 58a and the proximal cylindrical portion 58b of the stepped screw 58. Due to the level difference, it becomes equal to the length dimension of the base end cylindrical portion 58b. For this reason, the coil spring 57 has the spring engaging portion 55g of the support member 55 and the urging plate in accordance with the setting of its own natural length (length dimension in an unloaded state) and the length dimension of the base end cylindrical portion 58b. The spring 56 is appropriately compressed between the mounting base 56a.

  As a result, the support member 55 has the installation flat surface 55b pressed against the installation surface 54a of the boss portion 54 by the coil spring 57 and the base end of the stepped screw 58 slidably fitted to the reduced diameter portion 55f. The cylindrical portion 58b prevents movement in a direction orthogonal to the adjustment direction AD (center axis line MA). For this reason, the support member 55 can be stably rotated on the installation surface 54a of the boss portion 54 with the central axis MA as the rotation center. Further, the urging plate spring 56 has a mounting base portion 56a pressed against the head portion 58c of the stepped screw 58 by a coil spring 57, and is held between the coil spring 57 and the head portion 58c to prevent rattling.

  On the adjustment cam surface 55 c of the support member 55, the second supported portion 52 b 2 of the holding plate 52 that holds the imaging device 11 integrally with the substrate 51 is disposed, and the second supported portion 52 b 2 of the holding plate 52 is arranged on the second supported portion 52 b 2. The pressing portion 56b (the bent portion 56d) of the urging plate spring 56 is in contact with the second supported portion 52b2 (holding plate 52) so that the provided rotation regulating portion 52d is sandwiched by the notch portion 56e. . For this reason, in the second supported portion 52b2 of the holding plate 52, the pressing portion 56b (the bent portion 56d) of the urging plate spring 56 provided on the proximal end cylindrical portion 58b of the stepped screw 58 is adjusted in the adjustment direction AD. It is pressed toward the housing portion 39A (from the upper side to the lower side when viewed from the front in FIG. 6), and the supported portion 52f of the second supported portion 52b2 is the adjusting cam surface 55c of the supporting member 55. Is in pressure contact. For this reason, the adjustment cam surface 55c supports the holding plate 52 (second supported portion 52b2) in the adjustment direction AD orthogonal to the reference surface Bp.

  As described above, the holding plate 52 is inserted in the two reference holes 52c through the positioning projections 39Aa and the positioning projections 39Ab of the casing portion 39A, so that the holding plate 52 is orthogonal to the adjustment direction AD with respect to the casing portion 39A. The position of the holding plate 52 as seen in FIG. For this reason, in the housing 39A, when viewed in a direction orthogonal to the adjustment direction AD, the positional relationship of the second supported portion 52b2 (the supported location 52f) with respect to the support member 55 does not change. On the other hand, as described above, the support member 55 can stably rotate on the installation surface 54a of the boss portion 54 around the center axis MA as the rotation center. Abutting on the adjustment cam surface 55c against the second supported portion 52b2 (the supported location 52f) of the holding plate 52 by being rotated through an engaged jig (tool (not shown)) or the like. The position can be changed gradually. The adjustment cam surface 55c is a spiral inclined surface that changes the thickness dimension of the support member 55 viewed in the direction of the central axis MA, and the central axis MA is parallel to the adjustment direction AD. Then, by rotating the support member 55, the support point in the adjustment direction AD with respect to the second supported portion 52b2 (the supported location 52f) of the holding plate 52 is determined according to the adjustment cam surface 55c (its inclination). It can be gradually changed in the adjustment direction AD. Here, in the urging plate spring 56, the mounting hole 56 c of the mounting base portion 56 a is inserted into the stepped screw 58 (its base end cylindrical portion 58 b), and the notch portion 56 e of the pressing portion 56 b is rotated by the holding plate 52. Since the restricting portion 52d is sandwiched, it is prevented from rotating with the rotation operation of the support member 55.

  Here, in the tilt adjustment mechanism 50, as described above, the holding plate 52 is supported at the three points of the first supported part 52b1 and the third supported part 52b3 in addition to the second supported part 52b2. Each support member 55 (its adjustment cam surface 55c) allows the support position in the adjustment direction AD in the housing portion 39A to be gradually changed according to the adjustment cam surface 55c. For this reason, since the position of the holding plate 52 in the adjustment direction AD and the inclination with respect to the adjustment direction AD can be adjusted, the tilt adjustment of the image sensor 11 integrally held by the holding plate 52 can be performed.

  At this time, at each supported point of the holding plate 52 (the supported portion 52f of the first supported portion 52b1, the second supported portion 52b2, and the third supported portion 52b3), the pushing force toward the inclination direction of the adjustment cam surface 55c is performed. Pressure P (see FIGS. 8 and 9) acts. This will be described below using the second supported portion 52b2 on the adjustment cam surface 55c as an example with reference to FIG. Here, the inclination direction is relative to the running direction of the adjustment cam surface 55c and the reference surface Bp (see FIG. 1) (the extending direction of the line of intersection (straight line formed between the adjustment cam surface 55c and the reference surface Bp)). The direction that is orthogonal.

  In the example of FIG. 8, the inclination angle of the adjustment cam surface 55c with respect to the reference surface Bp (see FIG. 1) is θ. As described above, the reference plane Bp is orthogonal to the photographing optical axis OA, that is, the adjustment direction AD, and the adjustment direction AD is parallel to the central axis MA direction of the support member 55. The urging force F applied to the second supported portion 52b2 of the holding plate 52 by the urging plate spring 56 acts in the adjustment direction AD. For this reason, the supported portion 52f of the second supported portion 52b2 of the holding plate 52 receives a pressing force F ′ (= F) pressed against the adjustment cam surface 55c in the adjustment direction AD and is perpendicular to the adjustment cam surface 55c. Efficacy N (= Fcos θ) will be received. Thereby, in the 2nd to-be-supported part 52b2 of the holding | maintenance board 52, the pressing force P to the inclination direction acts as a synthetic force of pressing force F 'and the vertical effect N.

  This pressing force P acts on each supported point of the holding plate 52, that is, the supported portion 52f of the first supported portion 52b1, the second supported portion 52b2, and the third supported portion 52b3 (see FIG. 9). ). Since the pressing force P acting on each supported point acts in the inclination direction of the adjustment cam surface 55c as described above, it has a component in the direction orthogonal to the adjustment direction AD. The casing 39A is biased (pressed) in a direction orthogonal to the adjustment direction AD. Considering this, the tilt adjustment mechanism 50 according to the present invention has the following configuration. In the following description using FIG. 9, the orthogonal component of the pressing force P acting on the supported portion 52f of the first supported portion 52b1 is applied to the pressing force P1 and the supported location 52f of the second supported portion 52b2. The orthogonal component of the pressing force P to be applied is the pressing force P2, and the orthogonal component of the pressing force P acting on the supported portion 52f of the third supported portion 52b3 is the pressing force P3.

  In the tilt adjustment mechanism 50, the support plate 52 that integrally holds the image sensor 11 and each support point are formed so that the orthogonal components of the pressing force acting on the plurality of supported points cancel each other. A relative positional relationship with the adjustment cam surface 55c is set. In this embodiment, the pressing forces P1, P2, and P3 are directed from the supported points (support points) that are positioned so as to surround the imaging element 11 (imaging surface 11a) to the imaging element 11 side. The pressing force P1, the pressing force P2, and the pressing force P3 cancel each other. In other words, the combined force of the pressing force P1 and the pressing force P2 and the pressing force P3 are set so as to cancel each other. Here, canceling each other means that the respective pressing forces (P1, P2, P3) as orthogonal components are opposed (weakened) so as to decrease, and includes canceling out the orthogonal components completely. .

  Here, as described above, each of the pressing forces P1, P2, and P3 acts in the inclination direction of the adjustment cam surface 55c at the place (support point) where each supported point abuts. Further, as described above, each adjustment cam surface 55c has a spiral shape centered on the central axis MA of each support member 55, and each support member 55 has a central axis MA at a predetermined position in the housing portion 39A. It can be rotated around. For this reason, by setting the position where the supported portion 52f of each supported portion 52b is brought into contact with the adjustment cam surface 55c of each support member 55, the inclination of the adjustment cam surface 55c at the contact portion (support point) is set. The direction can be set. Therefore, in the tilt adjustment mechanism 50, the position where the supported portion 52f abuts against the adjustment cam surface 55c of the support member 55 in the first supported portion 52b1 and the second supported portion 52b2 in the housing portion 39A. A position where the supported location 52f abuts against the adjustment cam surface 55c of the support member 55, a position where the supported location 52f abuts against the adjustment cam surface 55c of the support member 55 in the third supported portion 52b3, Are set relatively, the inclination direction of the adjustment cam surface 55c at each support point is set, and the action directions of the pressing forces P1, P2, and P3 are set.

  Thus, in the tilt adjustment mechanism 50 according to the present invention, each support point that supports the holding plate 52 that holds the image sensor 11 is set so as to surround the image sensor 11 (the image pickup surface 11a), and Each pressing force is set so that the inclination direction of the adjustment cam surface 55c at each support point is directed toward the image sensor 11 when viewed in a direction along the reference plane Bp (a direction orthogonal to the adjustment direction AD). Since P1, P2, and P3 can be canceled each other, the force that acts to press the holding plate 52 in a direction orthogonal to the adjustment direction AD (imaging optical axis OA) can be made extremely small. For this reason, it can prevent that the image pick-up element 11 displaces to the direction orthogonal to imaging | photography optical axis OA.

  In addition, since the tilt adjusting mechanism 50 can cancel each pressing force P1, P2, and P3, the force acting to press the holding plate 52 in the direction orthogonal to the photographing optical axis OA is extremely small. Since the positioning protrusion 39Aa and the positioning protrusion 39Ab of the housing portion 39A engaged with the two reference holes 52c are pressed against the inner peripheral surface of the reference hole 52c, a large frictional force is generated. Can be prevented. Therefore, the holding plate 52 can be easily displaced in the adjustment direction AD, that is, the photographing optical axis OA direction, and the tilt adjustment of the image sensor 11 can be facilitated.

  Further, in the tilt adjustment mechanism 50, each supported portion 52b (the supported location 52f) of the holding plate 52 is supported by the adjustment cam surface 55c inclined with respect to the reference plane Bp, and the adjustment cam surface 55c Since the support position in the adjustment direction AD is changed by changing the contact position, the support position of the holding plate 52 in the adjustment direction AD can be minutely changed. Adjustment can be performed with high accuracy.

  In the tilt adjustment mechanism 50, the adjustment cam surface 55 c that forms each support point for the holding plate 52 that holds the image sensor 11 has a spiral shape centered on the central axis MA of the support member 55, and the support member Since the support position in the adjustment direction AD is changed by rotating the 55 around the central axis MA, the adjustment direction of each support point with respect to the rotation operation amount of the support member 55 can be achieved with a smaller and simpler configuration. Since the amount of change in AD can be made small, a gradual change can be made, so that the tilt adjustment of the image sensor 11 can be performed with higher accuracy.

  In the tilt adjustment mechanism 50, the adjustment cam surface 55 c that forms each support point for the holding plate 52 that holds the image sensor 11 has a spiral shape centered on the central axis MA of the support member 55, and the support member Since the support position in the adjustment direction AD is changed by rotating 55 around the central axis MA, the position of each support point in the adjustment direction AD can be set more appropriately. Tilt adjustment of the image sensor 11 can be performed with high accuracy. For example, when a member that adjusts the position of each support point in the adjustment direction AD is screwed to the housing, the adjustment is performed in accordance with changing the screwing amount for the adjustment. This is because there is a possibility that the member may rattle with respect to the housing.

  In the tilt adjustment mechanism 50, the adjustment cam surface 55c that forms each support point for the holding plate 52 that holds the image sensor 11 is a single inclined surface. Since the change in the adjustment direction AD of each support point with respect to the change in the contact position can be made continuous, the tilt adjustment of the image sensor 11 can be performed more easily and with high accuracy.

  In the tilt adjustment mechanism 50, each supported portion 52b (the supported location 52f) of the holding plate 52 is pressed (pressed) against the adjustment cam surface 55c of the support member 55 by the urging plate spring 56. The position of each support point in the adjustment direction AD with respect to the holding plate 52 can be adjusted more appropriately, and the tilt adjustment of the image sensor 11 can be performed with higher accuracy.

  In the tilt adjustment mechanism 50, since the plate-like urging plate spring 56 is used, the size of the holding plate 52 is not increased without increasing the size in the adjustment direction AD, that is, the photographing optical axis OA direction. The support portion 52b (the supported portion 52f) can be more appropriately pressed (pressed) against the adjustment cam surface 55c of the support member 55. For this reason, the tilt adjustment of the image sensor 11 can be performed with higher accuracy.

  In the tilt adjustment mechanism 50, each adjustment cam surface 55c has a spiral shape with the center axis MA of each support member 55 as the center, and each support member 55 is around the center axis MA at a predetermined position in the housing portion 39A. By being able to rotate, by setting the position where the supported portion 52f of each supported portion 52b abuts against the adjustment cam surface 55c viewed in the direction around the central axis MA of each supporting member 55, The inclination direction of the adjustment cam surface 55c at the contact point (support point) can be set. The position where the supported portion 52f of each supported portion 52b abuts against the adjustment cam surface 55c of each supporting member 55 is changed in the shape of the holding plate 52 or the arrangement position of each supporting member 55 in the housing portion 39A. It can be set appropriately by changing. For this reason, the tilt adjustment of the image sensor 11 can be performed easily and with high accuracy while having a high degree of design freedom.

  In the tilt adjustment mechanism 50, since each support member 55 having an adjustment cam surface 55c that forms a support point for the holding plate 52 is formed of a sintered material (firing), the adjustment cam surface 55c is formed with high accuracy. In addition, since the deformation with respect to the temperature change can be made extremely small, the tilt adjustment of the image sensor 11 can be performed with higher accuracy.

  In the tilt adjustment mechanism 50, the position of each support point with respect to the holding plate 52 in the adjustment direction AD can be adjusted by changing the rotation posture of each support member 55. Therefore, the tilt adjustment of the image sensor 11 can be performed with a simple configuration. It can be carried out.

  In the tilt adjustment mechanism 50, the support position can be adjusted in the adjustment direction AD while maintaining the state supported by the adjustment cam surface 55c of each support member 55, that is, the holding state of the holding plate 52 can be adjusted. Therefore, the tilt adjustment of the holding plate 52, that is, the image sensor 11, can be performed with high accuracy.

  In the tilt adjustment mechanism 50, each operation projection 55h of each support member 55 is extended to an outer position than the installation surface 54a of the boss portion 54 when viewed in the direction orthogonal to the central axis MA, and thus the rotation is rotated. It is possible to prevent the jig from interfering with the boss portion 54 when an operation jig (tool (not shown)) is brought closer to and engaged with the central axis MA. For this reason, rotation operation of each support member 55 can be made easier.

  In the tilt adjustment mechanism 50, the holding plate 52 integrally holds the image sensor 11 by bonding the adhesive convex portions 52e of the adhesive portions 52a addressed to the back surface 11b of the image sensor 11 to the back surface 11b. In addition, since the inclination of the holding plate 52 with respect to the reference plane Bp is adjusted, the tilt adjustment of the image sensor 11 can be performed with higher accuracy. This is because, for example, if the inclination of the substrate 51 on which the image sensor 11 is mounted is adjusted with respect to the reference plane Bp, the substrate 51 is easily deformed, so that the accuracy of tilt adjustment of the image sensor 11 is reduced. By inviting.

  In the tilt adjustment mechanism 50, since the support point for each supported portion 52b (the supported location 52f) of the holding plate 52 is formed by the adjustment cam surface 55c inclined with respect to the reference plane Bp, the adjustment is performed. By adjusting the inclination angle of the cam surface 55c with respect to the reference surface Bp, the magnitude of the pressing force acting in the direction perpendicular to the adjustment direction AD at each supported point of the holding plate 52 can be adjusted. For this reason, each pressing force P1, P2, and P3 can be more effectively canceled each other.

  In the tilt adjustment mechanism 50, the urging plate spring 56 as urging means presses each supported portion 52 b of the holding plate 52, thereby pressing the supported location 52 f against the adjustment cam surface 55 c of the support member 55 (pressure contact). Therefore, by adjusting the urging force of the urging means, the magnitude of the pressing force acting in the direction orthogonal to the adjustment direction AD at each supported point of the holding plate 52 can be adjusted. it can. For this reason, each pressing force P1, P2, and P3 can be more effectively canceled each other.

  Therefore, the tilt adjustment mechanism 50 according to the present invention can easily and accurately adjust the tilt of the image sensor 11.

  In the above-described embodiments, the tilt adjustment mechanism 50 as an example of the tilt adjustment mechanism according to the present invention has been described. However, the imaging surface of the imaging element that acquires the subject image formed by the imaging optical system is the imaging optical system. A tilt adjustment mechanism for holding the image sensor so that the tilt relative to the housing can be changed so as to match a reference plane set in the housing, an image sensor holding plate for holding the image sensor, And at least three support members having cam surfaces that form support points that support the image sensor holding plate so as to be displaceable in an adjustment direction orthogonal to the reference surface, and the cam surface includes the reference surface Each support member surrounds the image sensor as viewed in a direction along the reference plane, and the cam surface is inclined at a support point with respect to the image sensor holding plate. The tilt adjustment mechanism provided with the direction toward the image sensor side or the image pickup surface of the image sensor for acquiring the subject image formed by the image pickup optical system is set in the housing with respect to the image pickup optical system. A tilt adjustment mechanism that holds the image sensor so that the tilt relative to the housing can be changed so as to coincide with a reference surface, and is orthogonal to the reference surface and an image sensor holding plate that holds the image sensor At least three support members having cam surfaces that form support points that support the image sensor holding plate so as to be displaceable in an adjustment direction, and the cam surfaces are inclined with respect to the reference surface, The support member is a component in the direction along the reference plane in the pressing force to the image sensor holding plate that acts in the inclination direction of the cam surface due to the cam surface, and each support member of the image sensor holding plate. At the supporting point So that the combined component of the pressing force acting on the remaining supported points at each supported point of the image sensor holding plate cancels out against the pressing force acting on any one of the supported points. Any tilt adjustment mechanism in which the tilt direction is set may be used, and the present invention is not limited to the above-described embodiment.

  In the above-described embodiment, each support point that supports the holding plate 52 that holds the image sensor 11 is set so as to surround the image sensor 11 (its imaging surface 11a), and adjustment at each support point is performed. The cam surface 55c is set so that the inclination direction of the cam surface 55c is directed toward the image sensor 11 when viewed in the direction along the reference plane Bp (the direction orthogonal to the adjustment direction AD). The relative positional relationship between the holding plate 52 that integrally holds the image sensor 11 and the adjustment cam surface 55c that forms each support point is set so that the orthogonal components of the acting pressing force cancel each other. It should just be set and is not limited to the above-described embodiment. Another example of such a configuration is shown in FIG. FIG. 10 schematically shows a holding plate 52 similar to that of the above-described embodiment, and in order to show a mode of canceling each other, the pressing force P acting on three supported points is changed in the inclination direction at each supporting point. It is explanatory drawing which represented the orthogonal component by each pressing force P1, P2, and P3. For example, as shown in FIG. 10A, the pressing force P1 is applied inward (to the image sensor 11 side), and the pressing force P2 and the pressing force P3 are applied to the outer first supported portion 52b1 side. Can act. Further, as shown in FIG. 10B, the pressing force P1, the pressing force P2, and the pressing force P3 can be applied from the center to the outside. Further, as shown in FIG. 10C, the pressing force P1 is applied outward, and the pressing force P2 and the pressing force P3 are on the opposite side of the outer first supported portion 52b1 and approach each other. It can be made to act in the direction to do. Next, as shown in FIG. 10 (d), the pressing force P1 is applied to the inner side (image sensor 11 side), and the pressing force P2 is applied to the side opposite to the outer third supported portion 52b3. In addition, the pressing force P3 can be applied to the outer first supported portion 52b1 side.

  Further, in each of the above-described embodiments, each adjustment cam surface 55c has a spiral shape centered on the center axis MA of each support member 55. However, each supported portion 52b of the holding plate 52 (its supported location 52f). In order to make it possible to change the support position in the adjustment direction AD by changing the contact position on the adjustment cam surface 55c, it is only necessary to be inclined with respect to the reference plane Bp. It is not limited.

  In the above-described embodiment, the adjustment cam surface 55c that forms each support point for supporting the holding plate 52 is formed by a single inclined surface, but each supported portion 52b of the holding plate 52 (its supported location). 52f) with respect to the reference plane Bp so that the support position in the adjustment direction AD can be changed by changing the contact position on the adjustment cam surface 55c with respect to 52f). It is not limited to examples. Here, the single inclined surface means that it is continuous in the adjustment direction AD with respect to the displacement in the inclination direction regardless of whether the inclination with respect to the adjustment direction AD is the same or changes. . The continuation means that a single coordinate point in the adjustment direction AD corresponds to a single coordinate point seen in the tilt direction.

  In the above-described embodiment, the urging plate spring 56 as the urging means applies a urging force to each supported portion 52 b of the holding plate 52, so that the supported portion 52 f is applied to the adjustment cam surface 55 c of the support member 55. Although it is configured to press (pressure contact), the urging means presses (pressure contacts) each supported portion 52b (the supported location 52f) of the holding plate 52 against the adjustment cam surface 55c of the support member 55. As long as it is a thing, the urging | biasing force may be provided to the support member 55, and it is not limited to an above-described Example.

  In the above-described embodiment, the urging plate spring 56 having a plate shape is used as the urging unit. However, the urging unit includes the supported portions 52b of the holding plate 52 (the supported portions 52f). What is necessary is just to press (press-contact) the adjustment cam surface 55c of the support member 55, and it is not limited to an above-described Example.

  In the above-described embodiment, the urging plate spring 56 as the urging means is provided corresponding to each supported portion 52b, that is, each support member 55. However, each supported portion 52b of the holding plate 52 (its supported portion) The portion 52f) may be any member that presses (presses) the adjustment cam surface 55c of the support member 55, and is not limited to the above-described embodiment.

  In the above-described embodiment, the holding plate 52 that holds the image sensor 11 is supported by the three support points that can be displaced in the adjustment direction AD with respect to the housing portion 39A. It is sufficient that at least three or more can be provided in the adjustment direction AD with respect to 39A, and the present invention is not limited to the above-described embodiment.

  In the above-described embodiment, each support member 55 is formed of a sintered material (firing), but a cam surface (adjustment cam surface) that forms a support point that can be displaced in the adjustment direction AD with respect to the housing portion 39A. As long as it has 55c), it is not limited to the above-mentioned embodiment. It is desirable that the cam surface (adjustment cam surface 55c) can be formed with high accuracy and that deformation with respect to temperature change can be made extremely small. As such a method, it is conceivable to form by a sintered material (firing) as in the above-described embodiment, or by a die casting method.

  In the above-described embodiment, the tilt adjustment mechanism 50 is mounted on the digital camera 10, but an image sensor (imaging device) for a reference plane (reference plane Bp) set in the housing with respect to the photographing optical axis OA of the photographing optical system. If the tilt adjustment of the element 11) is required, it may be mounted on an image pickup apparatus (digital camera) provided with a photographing optical system integrally with the housing. The housing may be mounted on an imaging unit that is housed in a housing and is detachable from the imaging apparatus body, and is not limited to the above-described embodiment.

  In the embodiment described above, the tilt adjustment mechanism 50 is mounted on the digital camera 10, but may be mounted on a portable information terminal device such as a PDA (Personal Data Assistant) or a mobile phone incorporating a camera function. The present invention is not limited to the above-described embodiments.

  As described above, the photographing apparatus of the present invention has been described based on the embodiments. However, the specific configuration is not limited to the embodiments, and design changes and additions are allowed without departing from the gist of the present invention. The

DESCRIPTION OF SYMBOLS 10 Digital camera 11 Image pick-up element 11a Image pick-up surface 39A Case part (as housing | casing) 40 Interchangeable lens part (constituting imaging optical system) 50 Tilt adjustment mechanism 52 Holding plate (as image pick-up element holding plate) 52b1 (Supported) First supported portion 52b2 (being a point) Second supported portion 52b3 (being a point to be supported) Third supported portion 55 (being a point to be supported) 55 Support member 55c (as a cam surface forming the support point) Adjustment cam surface 56 Bias spring (as biasing means) AD Adjustment direction Bp Reference plane

JP 2002-247442 A

Claims (13)

In order to make the imaging surface of the imaging device for acquiring a subject image formed by the imaging optical system coincide with a reference plane set in the housing with respect to the imaging optical system, the inclination of the imaging device can be changed A tilt adjustment mechanism for holding
An image sensor holding plate for holding the image sensor;
And at least three support members having a cam surface that forms a support point that supports the imaging element holding plate so as to be displaceable in an adjustment direction orthogonal to the reference plane,
The cam surface is inclined with respect to the reference surface;
Each of the support members surrounds the imaging element when viewed in the direction along the reference plane, and is provided with the cam surface inclined direction at a support point with respect to the imaging element holding plate toward the imaging element side. A tilt adjustment mechanism characterized by In order to make the imaging surface of the imaging device for acquiring a subject image formed by the imaging optical system coincide with a reference plane set in the housing with respect to the imaging optical system, the inclination of the imaging device can be changed A tilt adjustment mechanism for holding
An image sensor holding plate for holding the image sensor;
And at least three support members having a cam surface that forms a support point that supports the imaging element holding plate so as to be displaceable in an adjustment direction orthogonal to the reference plane,
The cam surface is inclined with respect to the reference surface;
Each of the support members is formed by a component in the direction along the reference surface in the pressing force to the image sensor holding plate that acts in the inclination direction of the cam surface due to the cam surface. The combined component of the pressing force acting on the remaining supported points at each supported point of the image sensor holding plate cancels out against the pressing force acting on any one supported point at each supported point. In addition, the tilt adjusting mechanism is characterized in that the tilt directions of each other are set.   The tilt adjustment mechanism according to claim 1, wherein each cam surface is formed by a single inclined surface. Each of the supporting members is provided in the casing so as to be rotatable around an axis line along the adjustment direction.
4. The tilt adjustment mechanism according to claim 1, wherein each of the cam surfaces is a spiral plane inclined with respect to the adjustment direction. 5. The tilt adjustment mechanism according to any one of claims 1 to 4,
And a biasing unit that applies a biasing force that presses the imaging element holding plate and the cam surfaces in the adjustment direction to either the imaging element holding plate or the cam surfaces. Tilt adjustment mechanism.   The tilt adjustment mechanism according to claim 5, wherein the biasing means is a leaf spring.   The tilt adjustment mechanism according to claim 5 or 6, wherein the urging means is provided corresponding to each of the support members individually.   The tilt adjustment mechanism according to claim 7, wherein the urging means is set with an urging force so as to adjust a pressing force at each supported point of the imaging element holding plate.   9. The tilt angle of each of the cam surfaces is set so as to adjust a pressing force at each supported point of the image sensor holding plate. Tilt adjustment mechanism.   2. The arrangement position according to claim 1, wherein the support members are arranged in positions along the reference plane so as to adjust a pressing force at each supported point of the image sensor holding plate. Item 10. The tilt adjustment mechanism according to any one of Items 9.   The tilt adjustment mechanism according to claim 1, wherein the support member is made of a sintered material.   The tilt adjustment mechanism according to any one of claims 1 to 10, wherein the support member is formed by a die casting method. An imaging apparatus comprising the tilt adjustment mechanism according to any one of claims 1 to 12.