JP2005191702A - Viewfinder of imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a viewfinder with which a diopter-adjusting mechanism can be assembled, without contaminating a dioptor-adjusting lens and requiring difficult operations, in the viewfinder provided with the diopter-adjusting mechanism. <P>SOLUTION: The viewfinder is provided with a dioptor adjusting mechanism, having a dioptor adjusting lens 90 to be assembled in an optical axis direction along a guide section provided in the inside of a cabinet 84, a spring member 100 for energizing this lens 90 in one direction, a dioptor adjustment operating member 102 to be assembled freely rotatably into this cabinet 84, and a cam mechanism configured between the lens 90 and the member 102. In this case, the dioptor adjusting mechanism is configured, in such a way that the member 102 is assembled into the cabinet 84, and then the spring member 100, the lens 90 are assembled to the cabinet 84. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a viewfinder of an imaging apparatus, and particularly relates to a structure of a viewfinder including a diopter adjustment mechanism.

  A viewfinder mounted on an imaging apparatus such as a video camera is provided with a diopter adjustment mechanism that can variably adjust diopter according to the visual acuity of the user. Conventionally, as a viewfinder provided with this diopter adjustment mechanism, for example, there is one described in Patent Document 1 below.

That is, the diopter adjusting mechanism disclosed in Patent Document 1 includes a diopter adjusting lens that is assembled so as to be movable in the optical axis direction along a guide portion provided inside the cabinet, and the diopter adjusting lens in one direction. A spring member for biasing, a diopter adjustment operation member that is rotatably assembled to the cabinet, and a cam mechanism configured between the diopter adjustment lens and the diopter adjustment operation member. By rotating the diopter adjustment operation member, the operating force is transmitted to the diopter adjustment lens via the cam mechanism, and the diopter adjustment lens moves in the optical axis direction, thereby adjusting the diopter of the viewfinder. It has come to be.
JP-A-8-65552

  Conventionally, this diopter adjusting mechanism is configured by first assembling the spring member and the diopter adjusting lens in the cabinet and then assembling the diopter adjusting operation member in the cabinet. In this configuration, since the diopter adjustment lens is assembled first, there is a problem in that dust is easily attached to the diopter adjustment lens when the diopter adjustment operation member is assembled, and the lens is easily soiled. If the viewfinder is assembled with dust attached to the diopter adjustment lens, the dust appears to be magnified by the lens, so even a very small dust can be annoying and the viewfinder becomes defective. Further, when assembling the diopter adjustment operation member, a difficult operation of assembling the diopter adjustment operation member while pressing the diopter adjustment lens against the force of the spring member is required, which causes a problem of poor assembly efficiency.

  The present invention has been made in view of such problems, and in a viewfinder provided with a diopter adjustment mechanism, the diopter adjustment mechanism is assembled without contaminating the diopter adjustment lens and requiring difficult work. The purpose is to realize a viewfinder that can be used.

To achieve the above object, the present invention provides a diopter adjusting lens that is assembled so as to be movable in the direction of the optical axis along a guide portion provided inside a cabinet, and biases the diopter adjusting lens in one direction. A diopter adjustment mechanism including a spring member, a diopter adjustment operation member rotatably assembled to the cabinet, and a cam mechanism configured between the diopter adjustment lens and the diopter adjustment operation member. In the viewfinder, the diopter adjustment mechanism is configured so that the diopter adjustment operation member can be assembled to the cabinet first, and the spring member and the diopter adjustment lens can be assembled to the cabinet later.
In this configuration, the diopter adjustment operation member has a cam pin constituting the cam mechanism, and when the diopter adjustment lens is assembled, the diopter adjustment operation member is set to a rotation position where the cam pin does not interfere with the assembly of the diopter adjustment lens. In addition, after the diopter adjusting lens is assembled, the diopter adjusting operation member is rotated to engage the cam pin with the diopter adjusting lens.

  In the present invention, the diopter adjusting operation member is assembled in the cabinet first, and the diopter adjusting lens can be assembled in the cabinet later, so that the diopter adjusting lens is assembled first as in the prior art. Compared to the above, there is less risk of dust adhering to the diopter adjustment lens, and the lens is less likely to become dirty. Further, unlike the conventional case, it is not necessary to perform the difficult work of assembling the diopter adjustment operation member while pressing the diopter adjustment lens against the force of the spring member, so that the assembling efficiency can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the configuration of an imaging apparatus to which the present invention is applied will be described. 1 to 4 are a perspective view, a front view, a plan view, and a side view showing an embodiment of an image pickup apparatus, FIG. 5 is a perspective view from the rear side when the display device is opened, and FIG. 6 is a rear view on the disk side. FIG. 7 is a perspective view from the front with the disc lid opened, FIG. 8 is a perspective view of a state in which the disc-shaped recording medium is mounted, FIG. 9 is a side view of the same, and FIG. 10 is a state of gripping the imaging device. It is explanatory drawing.

  This imaging apparatus 1 uses a DVD (Digital Versatile Disc) having a diameter of 8 cm as a specific example of a disc-shaped recording medium that is an information storage medium, and converts an optical image into an electrical signal by a CCD (solid-state imaging device). This is one that can be converted and recorded on a DVD or displayed on a display device such as a liquid crystal monitor (hereinafter referred to as “disk-type imaging device”). However, the disc-shaped recording medium of the present invention is not limited to a DVD, and a CD-ROM or other recordable optical disc can be used, for example, a magneto-optical disc, a magnetic disc, etc. Thus, a disc-shaped recording medium of another recording method can be applied.

  The disc type imaging device 1 includes a disc drive device 3 (see FIGS. 7 to 9) that rotates (drives) a DVD 2 that is detachably mounted, and records (writes) and reproduces (reads) information signals. A control circuit (not shown) that controls the drive of the disk drive device 3, a lens device 4 that takes an image of a subject as light and guides it to the CCD, an exterior case 5 in which these disk drive device 3 and the like are stored, and this exterior case 5 is provided with a disc lid 7 or the like that is rotatably attached to 5 and can open and close the disc storage portion 6.

  The outer case 5 is disposed in front of and behind the disk side panel 8, the center panel 9, and the display device side panel 10, and the lens device 4 in the optical axis direction. The front panel 11 and the rear panel 12 to be combined with each other and a partition panel not shown in the figure disposed inside the central panel 9, and these panels 8 to 12 constitute a hollow casing. The disk drive device 3 is elastically supported on the surface of the partition panel on the disk side panel 8 side via mount insulators provided at four locations. These panels 8 to 12 are configured to be assembled and disassembled by an adhering means including a fixing screw at an appropriate portion overlapped with each other or through another member.

  The lens device 4 is fixed in a state of being built in the upper part of the outer case 5, and the objective lens 15 penetrates the upper part of the front panel 11 forward and is exposed to the front surface. Although not shown, a CCD is disposed behind the lens device 4 inside the exterior case 5, and a viewfinder 16 is disposed behind the CCD.

  The viewfinder 16 is exposed at the upper part of the exterior case 5 and is configured to be moved forward and backward by a predetermined distance in the optical axis direction of the lens device 4 by a finder moving mechanism. The viewfinder 16 is configured such that the rear side can be rotated in the vertical direction with the front side as a rotation center. As a result, the viewfinder 16 can be adjusted to an arbitrary angle within a predetermined angle range (about 90 degrees in this embodiment) from a horizontal state parallel to the optical axis of the lens device 4 to an upward state in which the rear portion is lifted upward. It is said that. The angle of the viewfinder 16 can be adjusted at any position from the front end portion to the rear end portion of the viewfinder moving mechanism.

  Further, an accessory shoe 17 to which accessories such as a video light and an external microphone are detachably attached is attached to the upper part of the outer case 5. The accessory shoe 17 is disposed immediately before the viewfinder 16 so that when the viewfinder 16 is moved rearward, the insertion opening to the accessory shoe 17 is opened. The accessory can be attached in a state where the insertion port is opened. When the viewfinder 16 is moved forward after the accessory is attached, the insertion port is closed and the accessory cannot be removed. The accessory shoe 17 is usually fitted with a shoe cap 18 that forms a lid that fills the space when not in use.

  Further, on the front surface of the front panel 11, a remote control light receiving unit 20, a microphone terminal, and a stereo built-in microphone 22 are arranged in order from the top. The remote control light receiving unit 20 is a receiving unit for remote control operation. The remote control light receiving unit 20 also serves as an infrared light emitting unit that emits infrared light used for automatically adjusting the focus. The microphone terminal includes a video terminal and an audio terminal, and these terminals are covered with a terminal cover 21 so as to be opened and closed.

  As shown in FIGS. 5 and 6, the rear panel 12 of the exterior case 5 is provided with a battery mounting portion 25 to which the power battery 24 is detachably mounted. The battery mounting part 25 is opened in the back surface and lower surface of the rear panel 12, and the power battery 24 is inserted and attached from below, and can be removed in the same direction. Further, two support fittings 26a and 26b for hanging straps are attached to the rear panel 12. Of the two support fittings 26a and 26b, one support fitting 26a is arranged at the upper part of the right side, and the other support fitting 26b is arranged at the lower part of the left side.

  As shown in FIGS. 4 and 5, a display device 28 is attached to the display device side panel 10 of the outer case 5 so that the posture can be changed. The display device 28 includes a flat liquid crystal monitor 29, a panel case 30 in which the liquid crystal monitor 29 is accommodated, and a panel support portion 31 that supports the panel case 30 with respect to the exterior case 5 so that the posture can be changed. Has been.

  The panel support unit 31 has a horizontal rotation function that allows the panel case 30 to be rotated about 90 degrees in the horizontal direction about the vertical axis, and the panel case 30 about 180 in the front-rear direction about the horizontal axis. It has a front / rear rotation function that can be rotated at a time. Thereby, the display device 28 is in the housed state shown in FIGS. 1 to 4, the panel case 30 shown in FIG. 5 is rotated 90 degrees, the liquid crystal monitor 29 is opposed to the rear, and the state shown in FIG. The state where the case 30 is rotated 180 degrees and the liquid crystal monitor 29 is opposed to the front and the state of the intermediate position thereof can be arbitrarily taken.

  Further, the display device side panel 10 includes an inner operation unit 32 including a plurality of operation buttons that are covered with a panel case 30 so as to be freely opened and closed, and an outer operation unit 33 including a plurality of operation buttons disposed above the panel case 30. Is provided.

  The disk storage unit 6 includes a fixed area having an opening for exposing a part of the disk drive device 3, and in this embodiment, the disk storage unit 6 is formed as an area having a size corresponding to a disk-shaped recording medium having a diameter of 8 cm. Yes. A table rotating device 35 of the disk drive device 3 is disposed at a substantially central portion of the disk storage portion 6, and the turntable 36 positioned at the central portion has a diameter of 8 cm showing a specific example of the disk-shaped recording medium. DVD2 can be mounted.

  As shown in FIG. 7, the disk storage unit 6 in which the table rotating device 35 is disposed is covered with a disk lid 7 whose side surface is rotatably supported by the disk side panel 8 so as to be opened and closed. The disc lid 7 has a shape commensurate with the shape of the disc storage portion 6. The disc lid 7 has a flat surface 7 a that covers the opening side of the disc storage portion 6, and a continuous circumference over substantially the entire circumference of the outer periphery of the flat surface portion 7 a. It has a surface portion 7b. The peripheral surface portion 7 b of the disc lid 7 is configured to fit with the outer peripheral side notch portion of the disc storage portion 6 of the disc side panel 8.

  The disk lid 7 shown in this embodiment has a shell shape in which approximately 5/6 (about 300 degrees) around the outer peripheral edge is circular (the circular portion may be approximately 3/4 or more of the whole). The remaining portion is a square portion 7c made of a straight line. A lid rotation shaft portion 39 serving as a rotation center for opening and closing the disk lid 7 is attached to the rectangular portion 7c. Although not shown, the lid rotation shaft portion 39 includes a support shaft that penetrates the rectangular portion 7c and a bearing member that has a pair of bearing pieces that support both ends of the support shaft in a fixed manner. The disk lid 7 is rotatably supported by being fixed to the panel 8. The lid rotation shaft portion 39 is provided with a stopper portion for setting a maximum opening angle (for example, 90 degrees) of the disc lid 7.

  Such a lid rotation shaft portion 39 is attached to the disk side panel 8 with the axial direction of the support shaft set in the vertical direction. As a result, the disc lid 7 is rotatably supported on the rear portion of the disc-side panel 8 via the lid rotation shaft portion 39. As a result, the disc cover 7 can be opened approximately 90 degrees to the side by front opening with the front of the disc type imaging device 1 as the front side. The lid rotation shaft portion 39 can stop the disc lid 7 at an arbitrary opening position within a certain opening angle range, and attach the disc lid 7 to the opening side when the opening angle is exceeded. A spring member is mounted so as to be biased.

  A constriction 42 which becomes a concave portion is formed by inclining toward the inner side of the display device side panel 10 in a portion extending from a substantially central portion of the upper surface portion of the central portion panel 9 overlapped with the disk side panel 8 to a lower portion of the front portion. Is set. A grip portion 43 for gripping and holding the disc type image pickup device 1 is constituted by the arc-shaped portions of the disc side panel 8 and the central portion panel 9 having the constriction 42.

  A lid opening / closing mechanism for the disk lid 7 is provided between the central panel 9 and the disk side panel 8. This lid opening / closing mechanism has a function of locking the disk lid 7 in a state of closing the disk storage portion 6 in the closed state and a function of releasing the lock.

  Further, as shown in FIGS. 3 and 6, a hand strap 60 is attached to the disk side panel 8 so as to surround the disk lid 7. The hand strap 60 supports the part of the user's hand that grips the grip portion 43 that is the grip portion of the outer case 5, and prevents the disk-type imaging device 1 from being removed.

  The hand strap 60 includes a support belt 61 having both ends fixed to the disk side panel 8 and a protective pad 62 that is attached to the support belt 61 and abuts against the back of the user's hand. One end of the support belt 61 is connected to a mounting bracket 63 fixed to the front lower portion of the disk side panel 8, and the other end is inserted inside through a through hole provided in the rear middle part of the disk side panel 8. It is fixed to the mounting bracket attached to.

  As shown in FIG. 6 and the like, a power button 64, a mode switching dial 65, and a recording button 66 are arranged at the rear part of the disk side panel 8. The mode switching dial 65 has a ring shape, and a power button 64 is accommodated in the hole. The power button 64 is composed of push-push type switch means, and the power supply from the power battery 24 is turned on and off by the pressing operation. The mode switching dial 65 is used to select an operation mode such as recording, and any mode can be selected from three modes of “still image mode”, “moving image mode”, and “view / edit mode” by rotating the mode dial 65. Can be selected. The recording button 66 includes push-push type switch means, and the start and stop of moving image shooting are repeated by the pressing operation.

  Further, a shutter button 67 and a zoom lever 68 are disposed on the upper rear side of the disk side panel 8. The shutter button 67 is for photographing a still image, and one still image is photographed for each pressing operation by the pressing operation. The zoom lever 68 is for enlarging an image at the time of shooting or reproduction, and the magnification can be adjusted steplessly within a certain range according to the operation amount.

  As described above, the interior of the outer case 5 is partitioned in the left-right direction (the direction intersecting the optical axis of the lens device 4) by the partition panel, whereby the first chamber on the disc lid 7 side and the display device side are separated. A second chamber is formed. The partition panel is made of a plate-like member and is fastened and fixed inside the outer case 5 by a fixing screw.

  Although not shown, the disk drive device 3 is accommodated in the first chamber of the outer case 5, and the lens device 4, the control circuit unit, and the like are accommodated in the second chamber. Therefore, a plurality of support protrusions for supporting the disk drive device 3 are provided on one side of the partition panel, and a plurality of support pieces for supporting the lens device 4 and the printed circuit board are provided on the other side. Is provided. The control circuit unit includes, for example, a microcomputer, a storage device (RAM, ROM), a capacitor, a resistor, and other electronic components, and a printed board on which these electronic components are mounted.

  As shown in FIG. 3, the disk drive device 3 includes a mechanical chassis 37 attached to the partition panel, a table rotating device 35 fixed to the mechanical chassis 37, an optical pickup device 71 showing a specific example of the pickup device, and the like. It is configured with. The mechanical chassis 37 is made of a conductive plate material, and is elastically supported by the partition panel via a plurality of mount insulators made of an elastic body made of an insulating material.

  The mechanical chassis 37 attached to the partition panel in this way is constituted by a frame-shaped member having a sufficiently large strength. The conductor portions of the mechanical chassis 37 and the partition panel are electrically connected to each other by a ground member (not shown), and are configured to easily discharge static electricity or the like to the outside. The table rotating device 35 mounted on the mechanical chassis 37 includes a spindle motor fixed to the mechanical chassis 37 and a turntable 36 fixed to a rotating portion of the spindle motor.

  The turntable 36 includes a fitting portion 36a into which the center hole of the DVD 2 is fitted, and a placement portion 36b on which the peripheral edge of the center hole is placed. Further, the fitting portion 36a of the turntable 36 is provided with a plurality of engaging claws 36c that are engaged with the peripheral portion of the center hole of the DVD 2 and hold the DVD 2 in the circumferential direction. Each engaging claw 36c is urged radially outward by a spring, and the DVD 2 is positioned and fixed to the fitting portion 36a by the spring force of the spring.

  The optical pickup device 71 includes a biaxial actuator 74 having a pickup lens 74a facing the information recording surface of the DVD 2, a slide member 75 on which the biaxial actuator 74 is mounted, and the like. The slide member 75 is movable by being guided by two guide shafts not shown in the figure. The two guide shafts are parallel to each other across the spindle motor, and a pickup moving device is provided near one of the guide shafts.

  Although not shown, the pickup moving device includes a feed screw shaft that is engaged with a feed nut attached to the slide member 75 and a feed motor that uses the feed screw shaft as a rotation shaft. The feed screw shaft is set parallel to the guide shaft of the optical pickup device 71 and is rotatably supported by the mechanical chassis 37. Thus, by driving the feed motor and rotating the feed screw shaft, the optical pickup device 71 selectively moves in the direction approaching the turntable 36 and the direction away from the turntable 36 according to the rotation direction of the feed screw shaft. Moved. The disk drive device 3 is constituted by the mechanical chassis 37, the table rotating device 35, the optical pickup device 71, the pickup moving device, and other related mechanisms.

  By fixing the partition panel to which the disk drive device 3 having such a configuration is attached to a predetermined position in the outer case 5, as shown in FIG. It is disposed in the disk storage portion 6 of the disk side panel 8. The disk storage 6 is opened and closed by a disk lid 7, and the disk lid 7 is locked and unlocked by a lid opening / closing mechanism.

  As shown in FIG. 7, the lid opening / closing mechanism includes a lock member 46 fixed to the disc lid 7 and an operation member 47 slidably attached to a base plate which is a member on the disc side panel 8 side. . The lock member 46 includes a pair of lock claws 46a and 46b. When the disk lid 7 is closed, the lock claws 46a and 46b are inserted into the insertion holes 57a and 57b formed in the front surface portion of the disk side panel 8. The disk lid 7 is unlocked by sliding the operation member 47.

  Thus, according to the disc type imaging device 1 in which the disc lid 7 is opened and closed, for example, the subject can be photographed by firmly holding the disc type imaging device 1 with one hand in a state as shown in FIG. In this case, the disk side panel 8 and the disk lid 7 of the outer case 5 serve as a gripping part for gripping the disk type imaging device 1 as it is, and the entire gripping part is formed in a substantially circular shape. Therefore, stable shooting can be performed with the large grip portion 43.

  In addition, since the constriction 42 is set inside the grip portion 43, a sufficiently large gripping force can be generated by gripping the constriction 42 with each tip portion from the index finger to the little finger. Furthermore, since the lid opening / closing mechanism 45 is housed in a space area set inside the grip portion 43, the space area in the exterior case 5 can be used without waste. Therefore, it is possible to reduce the size of the outer case 5 by eliminating the empty area in the outer case 5, and as a result, it is possible to reduce the size of the entire apparatus.

Next, a viewfinder that is a main part of the present invention will be described with reference to FIG.
FIG. 11 is a perspective view of the viewfinder. The viewfinder 16 is for viewing the display screen of the liquid crystal display device incorporated therein from the eyepiece 16a at the rear end. Here, the viewfinder 16 is attached to the base 81 fixed to the outer case 5 so as to be movable in the front-rear direction and so as to be rotatable up and down. Can be adjusted.

The cabinet of the viewfinder 16 is configured by combining a base cabinet 82, a finder cabinet 83, and an eye cup cabinet 84. Here, a liquid crystal display device is incorporated in the base cabinet 82, and the diopter ( A diopter adjustment mechanism for adjusting the focus according to the visual acuity of the user is incorporated in the eye cup cabinet 84.
Hereinafter, this diopter adjustment mechanism will be described in detail. 12 is a perspective view showing the appearance of the diopter adjustment mechanism unit of the viewfinder, FIG. 13 is a perspective view of a state in which the cabinet of the diopter adjustment mechanism unit is divided, and FIG. 14 is an exploded perspective view of the diopter adjustment mechanism unit. 15 is a partially cutaway front view of the diopter adjustment mechanism, FIG. 16 is a cross-sectional view taken along line AA in FIG. 15, FIG. 17 is a longitudinal side view of the diopter adjustment mechanism, and FIG. FIG. 19 is a front view of the diopter adjustment mechanism, FIGS. 20 to 22 are explanatory views of assembly of the diopter adjustment mechanism, FIG. 23 is a perspective view of the lens holder, and FIG. 24 is a diopter adjustment knob. FIG. 25 is a perspective view of a diopter adjustment lever.

  As shown in FIGS. 12 to 14, in the eye cup cabinet 84, a transparent cover 85 is fitted into the opening of the eyepiece 16 a and is fixed by a pressing member 86. The pressing member 86 has hook pieces 86a on both sides, and the hook pieces 86a are inserted and engaged with the fixing holes 87 of the eye cup cabinet 84 and fixed as shown in FIG.

  The diopter adjusting mechanism urges the diopter adjusting lens 90 in one direction, and a diopter adjusting lens 90 assembled so as to be movable in the optical axis direction along a guide portion provided inside the eye cup cabinet 84. A spring member 100, a diopter adjustment operation member 102 rotatably mounted on the eyecup cabinet 84, and a cam mechanism configured between the diopter adjustment lens 90 and the diopter adjustment operation member 102. It is configured.

  As shown in FIG. 14, the diopter adjustment lens 90 includes a lens body 91 and a lens holder 92 that holds the lens body 91. The lens holder 92 is made of a frame as shown in FIG. 23, has fixing holes 93 on both sides thereof, and is fixed by fitting convex portions 91a projecting on both sides of the lens body 91 into the fixing holes 93. To do. The lens holder 92 is provided with a bearing boss portion 94 below one side and a bearing frame portion 95 diagonally above the lens holder 92. The lens holder 92 is provided with the bearing boss portion 94 and the bearing. In the frame part 95, it is assembled | attached to the guide part of the eyecup cabinet 84 so that a movement is possible.

  The guide portion is composed of a guide shaft 98 that is press-fitted and fixed to the eyecup cabinet 84, and a guide rail 99 that protrudes integrally with the eyecup cabinet 84. As shown in FIG. 19, the bearing boss of the lens holder 92 is provided. A guide shaft 98 is inserted through the portion 94, and a guide rail 99 is inserted through the bearing frame portion 95. Here, as shown in FIG. 18, the guide rail 99 has a tip end portion 99a having a bifurcated shape and a hook shape, and the lens holder 92 has a bearing frame portion 95 at the hook-like portion of the tip end portion 99a. By being engaged, dropping from the eye cup cabinet 84 is prevented.

  Further, as shown in FIG. 23, the lens holder 92 has a cam surface portion 96 constituting a cam mechanism on one side thereof, and a cam pin described later is brought into contact with and engaged with the cam surface portion 96. Here, the cam surface portion 96 is formed to a height of about half of the entire height of the lens holder 92, and a notch 97 is formed above the cam surface portion 96.

  The spring member 100 is formed of a coil spring as shown in FIGS. 14 and 16, and is inserted between the eye cup cabinet 84 and the lens holder 92 through the guide shaft 98, and the diopter adjustment is performed by the elastic force of the spring member 100. The lens 90 is urged toward the viewfinder cabinet 83 side.

  As shown in FIG. 14, the diopter adjustment operation member 102 has a diopter adjustment knob 103 having a rotation axis in a direction orthogonal to the moving direction of the diopter adjustment lens 90, and an adjustment fixed to the diopter adjustment knob 103. And lever 104. The diopter adjustment knob 103 is exposed on the side surface of the eyecup cabinet 84 as shown in FIGS. 12 and 13, and the diopter is adjusted by rotating this. As shown in FIG. 14, the diopter adjustment knob 103 is rotatably attached to the bearing hole 105 of the eyecup cabinet 84 at its shaft portion 103a. Here, a rubber is interposed between the diopter adjustment knob 103 and the eyecup cabinet 84. A made O-ring 106 is incorporated to give the diopter adjustment knob 103 a required rotational frictional force.

  The adjustment lever 104 is formed in a C shape as shown in FIG. 14, and is fitted and fixed to the tip 103 b of the shaft portion 103 a of the diopter adjustment knob 103 inside the eye cup cabinet 84. A cam pin 104a protrudes from the adjustment lever 104, and the cam pin 104a abuts and engages with the cam surface portion 96 of the lens holder 92 as shown in FIG.

  24 and 25, a pair of convex portions 108a and 108b are formed at the tip 103b of the shaft portion 103a of the diopter adjustment knob 103, and correspondingly, the adjustment lever 104 has concave portions 109a and 109b. In the state where the adjustment lever 104 is fitted to the tip 103b of the shaft portion 103a of the diopter adjustment knob 103, the adjustment lever 104 is viewed by the engagement of the projections 108a and 108b and the recesses 109a and 109b. The degree adjusting knob 103 is securely fixed without rotating.

  Furthermore, a mismounting prevention protrusion 110 is provided at the tip 103 b of the shaft portion 103 a of the diopter adjustment knob 103. The erroneous mounting prevention protrusion 110 is provided only on one side between the convex portions 108a and 108b, and the correct fixing method is to fit the adjustment lever 104 from the opposite side of the erroneous mounting prevention protrusion 110. If the adjustment lever 104 is to be fitted in the opposite direction, that is, from the erroneous mounting prevention protrusion 110 side, the protrusion 111 of the adjustment lever 104 comes into contact with the erroneous mounting prevention protrusion 110, and the adjustment lever 104 may be inserted. Can not. Thus, erroneous mounting of the adjustment lever 104 is prevented, and the adjustment lever 104 can be correctly fixed to the diopter adjustment knob 103.

  As shown in FIGS. 13 and 17, the finder cabinet 83 is provided with a restricting projection 112 corresponding to the cam pin 104a as a rotation restricting means of the diopter adjustment knob 103. As will be described later, this restricting protrusion 112 is provided. The cam pin 104a is in contact with the protrusion 112, so that the rotation of the diopter adjustment knob 103 outside the specified range is restricted.

  In the diopter adjustment mechanism configured as described above, the cam surface portion 96 of the lens holder 92 is always pressed against the cam pin 104a by the force of the spring member 100. When the diopter adjustment knob 103 is rotated in this state, the adjustment lever 104 rotates together with the diopter adjustment knob 103, and the cam pin 104a of the adjustment lever 104 pushes and pulls the cam surface portion 96 of the lens holder 92. The degree adjustment lens 90 is moved along the guide shaft 98 and the guide rail 99 in the optical axis direction of the lens body 91, and the diopter is adjusted.

  In this adjustment operation, when the diopter adjustment knob 103 is rotated to the specified range, as shown in FIG. 17, the cam pin 104a of the adjustment lever 104 comes into contact with the restricting projection, thereby further rotating the diopter adjustment knob 103. Is regulated. Since the rotation of the diopter adjustment knob 103 outside the specified range is restricted by the restricting projection 112, the cam pin 104a of the adjustment lever 104 does not come off from the cam surface portion 96 of the lens holder 92. Reliable operation is guaranteed.

Next, a procedure for assembling the diopter adjusting mechanism configured as described above will be described.
This diopter adjustment mechanism is configured by assembling the diopter adjustment operation member 102 to the cabinet 84 first, and then attaching the spring member 100 and the diopter adjustment lens 90 to the eye cup cabinet 84 later. This will be described in more detail. First, the shaft portion 103a of the diopter adjustment knob 103 is passed through the bearing hole 105 from the outside of the eyecup cabinet 84, and then the shaft portion 103a of the diopter adjustment knob 103 from the inside of the eyecup cabinet 84. The adjustment lever 104 is fitted and fixed to the tip 103b. At this time, the O-ring 106 is fitted into the shaft portion 103 a of the diopter adjustment knob 103 in advance.

  After the diopter adjusting operation member 102 is assembled to the eye cup cabinet 84 in this way, as shown in FIG. 20, the spring member 100 is assembled to the guide shaft 98 of the eye cup cabinet 84, and then the diopter adjusting lens 90 as shown in FIG. Are assembled to the guide shaft 98 and the guide rail 99 of the eye cup cabinet 84.

At this time, the diopter adjustment operation member 102 is set at a rotational position where the cam pin 104a of the adjustment lever 104 does not interfere with the assembly of the diopter adjustment lens 90. In this example, the cam pin 104a is in the uppermost position, that is, at the 12 o'clock position, and in this state, as shown in FIGS. 19 and 21, the notch 97 portion of the lens holder 92 becomes a relief with respect to the cam pin 104a. The diopter adjustment lens 90 can be assembled smoothly without the cam pin 104a becoming an obstacle.
After this assembly, the diopter adjusting lens 90 is held so as not to drop off from the eye cup cabinet 84 by engaging the bearing frame portion 95 of the lens holder 92 with the hook-shaped portion of the tip 99a of the guide rail 99. Then, from this state, as shown in FIG. 22, the diopter adjustment knob 103 is rotated to bring the cam pin 104a into contact with the cam surface portion 96 of the lens holder 92.

  Thereafter, the finder cabinet 83 is combined with the eye cup cabinet 84 and fixed with screws 114. By combining the finder cabinet 83 with the eye cup cabinet 84 in this way, the restricting projection 112 of the finder cabinet 83 corresponds to the cam pin 104a as shown in FIG. 17, and functions as a rotation restricting means for the diopter adjustment knob 103.

  The diopter adjusting mechanism assembled as described above is configured in such a manner that the diopter adjusting operation member 102 is assembled in the cabinet first, and the diopter adjusting lens 90 is assembled in the cabinet later. Compared to the configuration in which the diopter adjustment lens is assembled first, there is an advantage that dust is less likely to adhere to the diopter adjustment lens 90 and the lens is less likely to get dirty. In addition, since it is not necessary to perform the difficult work of assembling the diopter adjustment operation member 102 while pressing the diopter adjustment lens 90 against the force of the spring member 100 as in the prior art, there is an advantage that the assembly efficiency is improved.

  The diopter adjustment mechanism of this example is the reverse of the procedure for assembling the diopter adjustment operation member 102 and the diopter adjustment lens 90, that is, the diopter adjustment lens 90 is first assembled in the cabinet, and the diopter adjustment operation is performed. It is also possible to configure the member 102 by assembling it later into the cabinet.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example in which the present invention is applied to a disk recording type imaging apparatus using a DVD as a recording medium has been described. However, the present invention is not limited to various imaging apparatuses such as a magnetic tape recording type imaging apparatus. It can be widely applied to viewfinders.

It is a perspective view which shows an imaging device. It is a front view which shows an imaging device. It is a top view which shows an imaging device. It is a side view which shows an imaging device. In an imaging device, it is the perspective view which opened the display device to the side and was seen from the back side. In the imaging device, it is the perspective view which attached the power battery and was seen from the back side. FIG. 5 is a perspective view of the imaging apparatus as viewed from the front side with the disc lid opened. FIG. 3 is a perspective view of a state where a disk-shaped recording medium is mounted in the imaging apparatus. FIG. 6 is a side view of the imaging apparatus with a disc lid opened. It is explanatory drawing which shows the use condition which gripped the grip part of the imaging device. It is a perspective view of a viewfinder to which the present invention is applied. It is a perspective view which shows the external appearance of the diopter adjustment mechanism part of a viewfinder. It is a perspective view of the state where the cabinet of the diopter adjustment mechanism part was divided. It is a disassembled perspective view of a diopter adjustment mechanism part. It is the front view which a part of diopter adjustment mechanism part cut out. It is AA sectional view taken on the line of FIG. It is a vertical side view of a diopter adjustment mechanism part. It is a cross-sectional bottom view of a diopter adjustment mechanism part. It is a front view of a diopter adjustment mechanism part. It is explanatory drawing of the assembly | attachment of a diopter adjustment mechanism part, and is the state which assembled | attached the spring member. It is explanatory drawing of the assembly | attachment of a diopter adjustment mechanism part, and is the state which assembled | attached the diopter adjustment lens. It is explanatory drawing of the assembly | attachment of a diopter adjustment mechanism part, and is the state which engaged the diopter adjustment operation member with the diopter adjustment lens. It is a perspective view of a lens holder. It is a perspective view of a diopter adjustment knob. It is a perspective view of a diopter adjustment lever.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Imaging device, 16 ... View finder, 83 ... Finder cabinet, 84 ... Eye cup cabinet, 90 ... Diopter adjustment lens, 91 ... Lens main body, 92 ... Lens holder, 96 ... Cam surface part, 98 ... Guide shaft, 99 ... Guide rail, 100 ... Spring member, 102 ... Diopter adjustment operation member, 103 ... Diopter adjustment knob, 104 ... Adjustment lever, 104a ... Cam pin, 112 ... Regulation protrusion (regulation portion)

Claims (3)

A diopter adjustment lens that is assembled so as to be movable in the optical axis direction along a guide portion provided inside the cabinet, a spring member that biases the diopter adjustment lens in one direction, and a rotary member that is rotatably assembled to the cabinet. A diopter adjustment mechanism comprising: a diopter adjustment member; and a cam mechanism configured between the diopter adjustment lens and the diopter adjustment operation member;
The diopter adjusting mechanism is configured so that the diopter adjusting operation member is assembled to the cabinet first, and the spring member and the diopter adjusting lens can be assembled to the cabinet later. Device viewfinder.   The diopter adjustment operation member has a cam pin constituting the cam mechanism, and the diopter adjustment operation member is rotated so that the cam pin does not become an obstacle to the assembly of the diopter adjustment lens when the diopter adjustment lens is assembled. 2. The structure according to claim 1, wherein the cam pin is engaged with the diopter adjusting lens by rotating the diopter adjusting operation member after the diopter adjusting lens is assembled. Viewfinder for imaging devices.   The viewfinder of the imaging apparatus according to claim 2, wherein the cabinet is provided with a restricting portion that restricts rotation of the diopter adjusting operation member outside a specified range by contacting the cam pin.

Images