JP2017040798A - Finder device and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform protection against dust in the inside at an assembly completion stage as a finder device, and to easily clean the inside by removing a detachable member.SOLUTION: An ocular window 8a is open at a rear side of a cover member 8, and a first opening 9a and a second opening 9b are formed on an upper surface of a base member 9. The openings 9a, 9b are connected to an internal space R surrounded by a display panel 13, the base member 9, and the cover member 8. When a detachable member 6 is fitted to the cover member 8, a holding part 6a of the detachable member 6 holds a protection glass 5 and the protection glass 5 blocks the ocular window 8a, and a lid 6b of the detachable member 6 blocks the openings 9a, 9b of the base member 9. By removing the detachable member 6 or the like, the openings 9a, 9b are opened.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a finder device provided in an optical apparatus such as an imaging device, and an imaging device including a finder device.

  2. Description of the Related Art Conventionally, an electronic finder device has been adopted in many optical devices including an imaging device such as a still camera and a video camera. Display panels applied to this finder apparatus are rapidly becoming higher in definition with increasing demands for miniaturization and price reduction. If an attempt is made to secure a wide viewing angle as a finder device while mounting a high-definition display panel, the optical enlargement ratio by the lens increases. If foreign matter such as dust adheres to the surface of the display panel or lens, the optical magnification is high, so even if the foreign matter is fine, it is easy for the photographer to visually recognize the foreign matter. .

  In general, in a camera manufacturing process, after a finder device is fixed to a structural part such as a chassis, external parts such as a top cover, a back cover, and an eyepiece cover are assembled. Then, after various inspection processes such as operation confirmation and appearance inspection, the process proceeds to packing and shipping work. In this inspection process, when a foreign object is found inside the finder apparatus, the camera body is brought into a rework process, and an internal cleaning operation is performed. In the retouching process, the worker once disassembles the external parts and the finder device to expose the surface of the lens, and then blows compressed air with a blower or the like to scatter foreign matter.

  However, this reworking process is a process after assembling the appearance parts, and repeating the disassembly and assembling of the camera body every time cleaning work is inefficient. Usually, the assembling process of the finder apparatus is performed in a relatively clean environment, and dust and dust are strictly controlled. However, such an environment is not always ensured even in the environment of the rework process. Therefore, while complicated operations such as disassembly and reassembly are repeated in the reworking process, there is a possibility that another new foreign matter may be mixed inside the finder apparatus.

  Therefore, as disclosed in Patent Document 1, an opening connected to the internal space surrounded by the dust-proof glass and the lens is formed, and the opening is attached by attaching an eyepiece cover which is a removable external part. A covering finder device is known. According to this configuration, even when a foreign object is found after the assembly of the camera body is completed, the eyepiece cover can be removed to expose the opening, and the tip of the blower can be inserted there. In this way, it is possible to remove foreign matter adhering to the surface of the dust-proof glass or lens by a relatively simple procedure.

  For example, Patent Document 2 proposes a configuration in which a foreign object removal effect is enhanced in a video camera that employs a layout in which a finder device is disposed immediately above a battery mounting portion. In this configuration, an adhesive surface is provided on the elastic member that prevents the battery from rattling, and the elastic member is attached to the opening connected to the internal space of the finder device and its periphery. Thereby, not only the opening part for performing a cleaning operation | work is blocked | closed by mounting | wearing of a battery but the effect of adsorbing a foreign material can be expected by exposing the adhesive surface to the inside from the opening part.

JP 2012-49614 A JP 2012-129619 A

  However, in any of the techniques of Patent Documents 1 and 2, not only are there many restrictions on the layout of the component parts, but it is not always easy to clean the inside of the finder apparatus. For example, in the configuration of Patent Document 1, it is necessary to lay out such that an opening having a sufficient area for inserting the tip of the blower when the finder device is internally cleaned is exposed on the upper surface side of the camera body. On the other hand, as shown in FIG. 1A, in a camera having an accessory shoe on the upper surface, even if the eyepiece cover is removed, the viewfinder device is covered with the accessory shoe as shown in FIG. The state remains. Therefore, if the camera body is not disassembled and the accessory shoe is not removed, the opening as described above is not exposed, and a cleaning operation for removing foreign matter cannot be performed.

  On the other hand, in the configuration of Patent Document 2, an opening is provided on the lower surface of the finder device, and a battery mounting portion is disposed below the finder device. When cleaning the inside of the finder device, it is necessary to remove the battery from the battery mounting portion to expose the opening on the lower surface of the finder device. Therefore, in order to enable the cleaning operation with such a configuration, it is necessary to have a layout in which the opening is exposed by removing the battery. Therefore, it is difficult to remove foreign substances in a general still camera that employs a layout in which components such as a lens barrel are arranged below the finder device.

  By the way, the structure of patent document 1, 2 becomes a structure which covers the opening part of a finder apparatus with the cover member which also serves as a part of external appearance of a camera. For this reason, in the camera manufacturing process, for example, from the start of assembly of the finder device to the completion of assembly of the cover member, it is necessary to proceed with work in a state where the internal space of the finder device is never sealed. However, as described above, since there is a limit to the management of dust and dust, as the number of processes and operations increases, the chance of contamination is increased. Therefore, there is room for improvement in the dust prevention inside the finder apparatus in the camera manufacturing process.

  An object of the present invention is to prevent internal dust at the stage of completion of assembly as a finder device, and to facilitate internal cleaning by removing a detachable member.

  To achieve the above object, the present invention provides a display unit, a lens group that transmits light from the display unit, a lens holder that holds the lens group, a base member that houses the lens holder inside, A cover member that is disposed closer to the viewer than the display unit and has an eyepiece window that allows light transmitted through the lens group to pass therethrough, glass for protecting the eyepiece window, and detachable from the cover member A finder device having an attachment / detachment member, wherein the base member is formed with an opening connected to an internal space surrounded by the display unit, the base member, and the cover member, and the attachment member is attached to the cover member. When attached, the detachable member holds the glass, the glass closes the eyepiece window, and the detachable member closes the opening of the base member. To.

  ADVANTAGE OF THE INVENTION According to this invention, while ensuring an internal dust prevention in the assembly completion stage as a finder apparatus, internal cleaning can be made easy by removing an attachment or detachment member.

It is the perspective view (figure (a)) which looked at the imaging device to which a finder apparatus is applied from the back side, and the perspective view (figure (b)) of the camera in the state where the eyepiece cover etc. were removed. It is a disassembled perspective view of a finder apparatus. It is the perspective view (figure (a)) which looked at the finder apparatus from the back side, and the disassembled perspective view (figure (b)) which shows the state which removed the detachable member. It is a rear view (figure (a)) of a finder device in an assembly completion state, and a sectional view (figure (b)) which meets a S1-S1 line. It is a rear view (figure (a)) of a finder device in the state where an detachable member etc. were removed, and a sectional view (figure (b)) which meets a S2-S2 line. It is a rear view (figure (a)) of a finder device in an assembly completion state, and a sectional view (figure (b)) which meets a S3-S3 line. It is a rear view (figure (a)) of a finder device in the state where an detachable member etc. were removed, and a sectional view (figure (b)) which meets a S4-S4 line. It is a rear view of the camera main body in the state at the time of the cleaning operation | work of a finder apparatus. It is sectional drawing which follows S5-S5 line. It is sectional drawing which follows S5-S5 line.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1A is a perspective view of an imaging apparatus to which a finder apparatus according to an embodiment of the present invention is applied, as viewed from the back side. Hereinafter, the same reference numerals denote the same or corresponding parts throughout the drawings. This imaging apparatus is configured as a digital still camera as an example. Hereinafter, with respect to the direction of the camera, it is assumed that the horizontal direction, that is, the horizontal direction as viewed from the photographer side (observer side) is x, the vertical direction, that is, the vertical direction is y, and the thickness direction of the camera body is z. The subject side in the z direction is the front side, and the photographer side is the back side. A finder device 200 is provided in the camera body. The optical axis direction of the lens group (first lens 101, second lens 102, and third lens 103), which will be described later with reference to FIG. 2, that is, the axial direction of the optical axis C0 is referred to as the optical axis direction of the finder device 200. . The optical axis direction is also the z direction.

  An eyepiece cover 1 constituting a part of the appearance of the camera is attached to the camera body. A diopter adjustment dial 2 is provided on the eyepiece cover 1. The camera body is also provided with a vari-angle liquid crystal 3 that can freely change the orientation of the display screen relative to the camera body. The accessory shoe 4 is also disposed on the camera body above the viewfinder device 200. The accessory shoe 4 is an external part to which an accessory such as a flash device can be attached and detached. The finder device 200 has a protective glass 5. The eyepiece cover 1 is provided with a window portion 1a which is an opening larger than the optically effective range of the finder device 200. When mounted on the camera body, the eyepiece cover 1 covers the viewfinder device 200 and exposes the protective glass 5 from the window portion 1a to the photographer side. In order to prevent the photographer's face from coming into contact with the vari-angle liquid crystal 3 or the protective glass 5 when the photographer looks into the viewfinder device 200, the eyepiece cover 1 is formed so as to protrude to the back side of the camera.

  The diopter adjustment dial 2 is rotatably held on the side surface of the eyepiece cover 1. For example, the photographer can operate the diopter adjustment dial 2 with the left hand while looking into the protective glass 5 while holding the camera body with the right hand. It should be noted that the diopter can be adjusted by operating the diopter adjustment dial 2 in a range from −4.0 diopter which is the minus end to +2.0 diopter which is the plus end.

  FIG. 1B shows a camera showing a state in which the unit in which the eyepiece cover 1 and the diopter adjustment dial 2 are integrated is removed from the state shown in FIG. It is a perspective view. The eyepiece cover 1 is assembled to the camera body by a so-called snap fit, in which a plurality of convex claws are fitted and fixed in corresponding concave shapes. Accordingly, as shown in FIG. 1B, when the vari-angle liquid crystal 3 is opened outward and the eyepiece cover 1 is pulled strongly to the back side, the eyepiece cover 1 and the diopter adjustment dial 2 held by the eyepiece cover 1 are removed from the camera body. It can be easily removed.

  In the finder device 200, the detachable member 6 is fixed by screws 7. When the eyepiece cover 1 is removed from the camera body, the screw 7 is exposed to the back side. Even in this state, most of the finder device 200 remains embedded in the camera body, the upper surface side of the finder device 200 overlaps with the accessory shoe 4, and the lower surface side overlaps with a lens barrel unit (not shown).

  FIG. 2 is an exploded perspective view of the finder device 200. 2-7, illustration of other components, such as an external component, is abbreviate | omitted and only the finder apparatus 200 is shown in figure.

  The cover member 8 is made of a metal plate and is disposed on the back side of the base member 9. The cover member 8 sandwiches the protective glass 5 with the detachable member 6 and fixes it. The base member 9 is formed by resin injection molding, and becomes an outline of the finder device 200. The base member 9 accommodates the lens holder unit 10 inside. In addition to the lens holder 100 and the lens group (first lens 101, second lens 102, and third lens 103), the lens holder unit 10 includes spacers 104 and 105, a rubber member 106, a lens cover 107, and a follower pin 108. Have.

  In the z direction, the first lens 101, the spacer 104, the second lens 102, the spacer 105, the third lens 103, and the rubber member 106 are fitted into the lens holder 100 in this order from the front side. The spacer 104 adjusts the lens interval between the first lens 101 and the second lens 102. The spacer 105 adjusts the lens interval between the second lens 102 and the third lens 103. The rubber cover 106 is elastically compressed in the z direction by fitting the lens cover 107 as a lid to the lens holder 100 with a claw. In this way, the lenses 101 to 103 are offset and held with high accuracy, and the interior of the lens holder unit 10 is sealed. In this sealed state, the lens holder unit 10 has a dust-proof structure in which foreign matter does not enter the interior, and whether or not the foreign matter remains inside is strictly controlled by unit inspection.

  The follower pin 108 is press-fitted into the side surface of the lens holder 100. The guide bar 11 is made of metal and is disposed on the side of the lens holder unit 10 to guide the movement of the lens holder unit 10 in the optical axis direction. The cam member 12 is rotatably held on the side surface of the base member 9. The cam member 12 is a member that slides with respect to the follower pin 108 and moves the lens holder unit 10 in the optical axis direction, and is gear-coupled to a part of the diopter adjustment dial 2 in the state shown in FIG. The When the photographer rotates the diopter adjustment dial 2, the cam member 12 rotates in conjunction with the rotation, and the lens holder unit 10 moves in the optical axis direction. In this way, the diopter can be easily adjusted, and even a photographer with myopia, hyperopia or presbyopia can focus the display screen with the naked eye. The cam member 12 corresponds to an adjusting means for adjusting diopter.

  A display panel 13 (display unit) is disposed on the front side of the base member 9. The rubber member 14 is compressed and sandwiched between the base member 9 and the display panel 13. A proximity sensor 15 is disposed on the back side of the finder device 200. The proximity sensor 15 detects whether or not the photographer is looking into the viewfinder device 200, and information detected there is used for controlling the display panel 13. However, since the details of the control are known, the description thereof is omitted here.

  FIG. 3A is a perspective view of the finder device 200 viewed from the back side. FIG. 3B is an exploded perspective view illustrating a state in which the screw 7, the detachable member 6, and the protective glass 5 are sequentially removed from the finder device 200. In the present embodiment, the state shown in FIG. 3A is the assembly completion state of the finder apparatus 200, and the finder apparatus 200 is used by being attached to the camera body in this state. The state shown in FIG. 3B is assumed to be a state when the finder apparatus 200 is being cleaned. It is assumed that the cleaning work is performed both before and after the finder device 200 is mounted on the camera body.

  An eyepiece window 8a is opened on the back side of the cover member 8 (FIG. 3A). Through the eyepiece window 8a, an effective light beam emitted from the display panel 13 and transmitted through the lens group passes. On the upper surface of the base member 9, a first opening 9a and a second opening 9b are formed as openings. These openings 9a and 9b are formed at different positions in the optical axis direction, and the first opening 9a is located on the front side.

  The detachable member 6 has a holding part 6a, a lid part 6b, and a lightning rod part 6c. The detachable member 6 is attached to the cover member 8 with screws 7. Since the detachable member 6 is integrally formed of metal, it has elasticity as a whole. In a state where the detachable member 6 is attached to the cover member 8, the holding portion 6 a holds the protective glass 5 in pressure contact with the cover member 8 by elasticity on the back side of the finder device 200. The lid portion 6b is formed so as to cover the upper surface side of the base member 9, and when the detachable member 6 is mounted on the cover member 8, the lid portion 6b is elastically pressed against the upper surface of the base member 9 from above and has openings 9a, 9b. Block.

  The detachable member 6 and the cover member 8 are both made of a conductive member, and are electrically connected to each other by fastening screws 7 and further grounded to a ground (not shown). The proximity sensor 15 converts infrared light information into an electrical signal. If the proximity sensor 15 is strongly affected by static electricity, there is a risk of erroneous detection or damage. Therefore, a lightning rod 6c is formed on the detachable member 6 so that static electricity that has entered the camera through the window 1a of the eyepiece cover 1 is not directly applied to the proximity sensor 15. The lightning rod portion 6c is disposed between the proximity sensor 15 and the protective glass 5 and also serves as a positioning function of the protective glass 5 in the x direction. Static electricity that has entered the inside of the camera is absorbed by the lightning rod 6c through the protective glass 5 and falls to the ground via the electrically connected cover member 8. Thus, the proximity sensor 15 is protected from static electricity from the outside.

  The relationship between the openings 9a and 9b and the lid portion 6b of the holding portion 6 and the relationship between the eyepiece window 8a, the holding portion 6a, and the protective glass 5 will be described in more detail with reference to FIGS. FIG. 4A is a rear view of the finder apparatus 200 in the assembly completed state (the state shown in FIG. 3A), and particularly shows an enlarged vicinity of the upper surface. FIG. 4B is a cross-sectional view taken along line S1-S1 in FIG. FIG. 5A is a rear view of the finder apparatus 200 in the state of FIG. 3B, and particularly shows an enlarged vicinity of the upper surface. FIG.5 (b) is sectional drawing which follows the S2-S2 line | wire of Fig.5 (a). Both the S1-S1 cross section and the S2-S2 cross section correspond to the yz plane including the optical axis C0.

  Of the region surrounded by the display panel 13, the base member 9, and the cover member 8, the space excluding the sealed space in the lens holder unit 10 is the internal space R (Ra, Rb, Rc; the internal space Rc is shown in FIG. 10). Of the internal space R, a region sandwiched between the display panel 13 and the first lens 101 in the z direction is the internal space Ra, and a region sandwiched between the cover member 8 and the third lens 103 is the internal space Rb. A region below the base member 9 and between the base member 9 and the lens holder 100 is an internal space Rc (FIGS. 9 and 10).

  As described above, the first opening 9a and the second opening 9b are formed at different positions in the optical axis direction. The first opening 9a is connected to the internal space Ra, and the second opening 9b is connected to the internal space Rb. As can be seen by comparing FIG. 4B and FIG. 5B, when the detachable member 6 is removed together with the protective glass 5 from the cover member 8, the lid 6b does not cover the base member 9, The first opening 9a and the second opening 9b are exposed upward, and the internal space R is opened. Moreover, the ocular window 8a is exposed to the back side by removing the protective glass 5. Accordingly, the internal space R communicates with the outside air through the first opening 9a and / or the second opening 9b, and it becomes possible to clean the inside of the finder device 200 relatively easily. Will be described later.

  On the other hand, even when the removed components are assembled and returned from the state of FIG. 5B to the state of FIG. 4B, the operation is easy. At this time, the lid 6b of the detachable member 6 overlaps the upper surface of the base member 9 in the y direction and closes the first opening 9a and the second opening 9b. At the same time, the holding portion 6 a of the detachable member 6 is configured to overlap the protective glass 5 and the cover member 8 in the z direction, and the eyepiece window 8 a is closed by the protective glass 5.

  In particular, the detachable member 6 is made of a metal plate having a spring property and is bent by pressing so that the lid portion 6b and the holding portion 6a form an angle of 90 degrees or more and 100 degrees or less in a side view. And the cover part 6b and the holding | maintenance part 6a which were formed substantially orthogonal to each other are each in pressure contact with the base member 9 and the protective glass 5 with good balance. 4B, the cover 6b of the detachable member 6 is pressure-bonded to the base member 9, and the protective glass 5 is pressure-bonded to the cover member 8. Since the openings 9a and 9b are closed and the eyepiece window 8a is closed, the inside of the finder device 200 (internal space R) is sealed.

  By the way, in the manufacturing process for manufacturing the camera, when the assembling of the finder apparatus 200 is completed, a dust-proof structure is formed in which the inside is sealed as shown in FIGS. 3 (a) and 4 (b). Therefore, the quality related to the display of the finder apparatus 200 is not affected by dust or dust existing in the subsequent process. In other words, unlike the configurations of the conventional Patent Documents 1 and 2, the finder device 200 itself is protected from dust regardless of the timing when the assembled finder device 200 is assembled to the camera body. There are fewer restrictions in the process.

  Next, the holding structure of the guide bar 11 will be described with reference to FIGS. FIG. 6A is a rear view of the finder device 200 in the assembled state (the state shown in FIG. 3A), and particularly shows the vicinity of the lower surface in an enlarged manner. FIG. 6B is a cross-sectional view taken along the line S3-S3 in FIG. FIG. 7A is a rear view of the finder apparatus 200 in the state of FIG. 3B, and particularly shows an enlarged vicinity of the upper surface. FIG.7 (b) is sectional drawing which follows the S4-S4 line | wire of Fig.7 (a). Both the S3-S3 cross section and the S4-S4 cross section correspond to the yz plane including the axial center of the guide bar 11.

  A through hole 8b is formed in the rear portion of the cover member 8 (FIGS. 6B and 7B). As shown in FIG. 6B, the front end of the guide bar 11 is press-fitted into the base member 9, and the other end on the back side is held in the through hole 8 b of the cover member 8. The other end of the guide bar 11 is in contact with the protective glass 5 in the z direction, and the contact position in the xy plane is outside the eyepiece window 8a (FIGS. 6A and 7A). ). That is, the guide bar 11 is in contact with the protective glass 5 in a region outside the eyepiece window 8a with respect to the optical axis C0. As a result, the protective glass 5 functions to prevent the guide bar 11 from coming off outside the optically effective range. In FIG. 6A, the guide bar 11 and the eyepiece window 8a that are seen through the protective glass 5 are indicated by dotted lines. The guide bar 11 does not affect the optical effective range. Since the protective glass 5 is a substantially rectangular transparent parallel plate, even after the assembly of the finder device 200 is completed, the operator can visually recognize the state of the guide bar 11 exposed from the through hole 8b from the back side. Thereby, it is possible to visually check whether the guide bar 11 is forgotten to be assembled or insufficiently press-fitted, and it becomes easy to detect an assembly failure.

  Further, as shown in FIG. 1A, the protective glass 5 is always exposed to the outside from the window portion 1a of the eyepiece cover 1, so that it may be accidentally pushed in the z direction to receive pressure. However, while the protective glass 5 prevents the guide bar 11 from coming off, the guide bar 11 serves as a metal support as it is, and receives the load in the pushing direction against the protective glass 5 to suppress the deformation of the protective glass 5. Since the axial direction of the guide bar 11 is the z direction, the rigidity of the guide bar 11 in the z direction is high. Since the deformation suppressing effect of the protective glass 5 is high, the thickness of the cover member 8 can be designed to be thin accordingly. As described above, both the maintenance of the rigidity of the finder device 200 and the miniaturization thereof are achieved.

  As shown in FIG. 7B, in the state where the detachable member 6 and the protective glass 5 are removed, the function of preventing the guide bar 11 from being removed is lost, but the other end on the back side is held in the through hole 8b. is there. Therefore, even if compressed air is blown to the internal space R of the finder apparatus 200 for cleaning work in this state, the guide bar 11 drops and tilts, or the lens holder unit 10 deviates from the center of the optical axis C0. There is no fear.

  Details of the cleaning operation of the finder apparatus 200 will be described with reference to FIGS. FIG. 8 is a rear view of the camera body, and shows a state during the cleaning operation of the finder apparatus 200. In this state, the vari-angle liquid crystal 3 is opened outward, the eyepiece cover 1 is removed from the camera body, and the screw 7, the detachable member 6, and the protective glass 5 are removed from the finder device 200. This state corresponds to the states shown in FIGS. 3B, 5A, and 7A.

  9 and 10 are cross-sectional views taken along the line S5-S5 in FIG. In particular, FIG. 9 shows a case where the diopter is adjusted to −1.0 diopter, and FIG. 10 shows a case where the diopter is adjusted to −4.0 diopter which is the most negative side. The S5-S5 cross section corresponds to the yz plane including the optical axis C0. 9 and 10 schematically show the air flow during cleaning with arrows.

  In the state shown in FIG. 9, the lens holder 100 (or the lens holder unit 10) is located on the relatively back side. At this position, an internal space Ra is formed in the rear portion of the base member 9, and the internal spaces Ra, Rb, and Rc communicate with each other. In the state shown in FIG. 10, the lens holder 100 (or the lens holder unit 10) is positioned at the foremost side in the movable range. In this position, the internal space Ra hardly occurs.

  When the lens holder 100 is in the position shown in FIG. 9, the lens holder 100 overlaps with the second opening 9b, and the passage between the second opening 9b and the internal space Rb is closed (FIG. 9). Actually, there is a movable range of the lens holder 100 on the back side from this position. However, even if the lens holder 100 is moved further to the back side, the state in which the second opening 9b is blocked is changed. Absent. Thus, the range of the position of the lens holder 100 where the passage between the second opening 9b and the internal space Rb is blocked or becomes the narrowest is defined as a “first range”. When the lens holder 100 is in the first range, the first opening 9a and the eyepiece window 8a are connected via the internal spaces Ra to Rc.

  On the other hand, when the lens holder 100 is in the position shown in FIG. 10, the lens holder 100 overlaps the first opening 9a, and there is almost no passage between the first opening 9a and the internal space Ra. Substantial clogging. Even if the lens holder 100 is located slightly behind the position shown in FIG. 10, the state in which the lens holder unit 10 closes the first opening 9a does not change much. In this way, the range of the position of the lens holder 100 where the passage between the first opening 9a and the internal space Ra is blocked or becomes the narrowest is defined as a “second range”. When the lens holder 100 is in the second range, the second opening 9b and the eyepiece window 8a are connected via the internal space Rb.

  The first range and the second range are the position ranges of the lens holder 100 in the optical axis direction, and are concepts having regions, but may be a concept indicating the position of a certain point. 9 and 10, when the accessory shoe 4 is attached and the detachable member 6 is removed, the openings 9a and 9b and the outside air are between the base member 9 and the accessory shoe 4. A gap CL for ensuring communication is formed. The openings 9a and 9b are opened toward the gap CL.

  When cleaning when the lens holder 100 is in the first range, as shown by the arrow in FIG. 9, when compressed air is blown from the eyepiece window 8 a to the internal space Rb by the blower, the air is below the lens holder 100. It passes through the internal space Rc on the side and flows into the internal space Ra. At this time, the inside of the finder apparatus 200 (internal space R) is in a state where there is no air escape route other than the first opening 9a. Therefore, the compressed air that has flowed into the internal space Ra is discharged from the internal space R upward from the first opening 9a as indicated by an arrow. The air discharged from the first opening 9a passes through the gap CL and is guided to the outside of the camera body. The cleaning operation is performed by using such an air flow. Mainly, foreign substances adhering to the surface of the display panel 13 or the first lens 101 are removed from the first opening 9a to the outside of the finder device 200. Can be scattered. By creating such an air flow, foreign matter inside the finder apparatus that cannot be removed unless it is originally decomposed can be removed relatively easily.

  On the other hand, during cleaning when the lens holder 100 is in the second range, an air path different from that in the first range is formed as indicated by an arrow in FIG. That is, when compressed air is blown from the eyepiece window 8a to the internal space Rb with a blower, the air is discharged from the second opening 9b. At that time, the air flowing into the internal space Rb mainly scatters foreign matter adhering to the surface of the third lens 103. Even if the accessory shoe 4 has a layout that overlaps with the second opening 9b, the air discharged from the second opening 9b can be smoothly transferred to the outside air by ensuring the clearance CL. Released.

  Here, it is assumed that the lens holder 100 is in the second range (FIG. 10) in a configuration in which only the first opening 9a is provided in the base member 9 and the second opening 9b is not provided. Think. In this case, the air inlet and outlet are substantially only the eyepiece window 8 a, and the more the compressed air is blown onto the surface of the third lens 103, the more easily the air stays in the internal space Rb of the base member 9. Since a smooth air flow does not occur, the foreign matter once scattered from the surface of the third lens 103 may not be discharged to the outside of the finder device 200 and may adhere to the lens surface again. On the other hand, in the present embodiment, as indicated by an arrow in FIG. 10, the air flowing into the internal space Rb scatters the foreign matter adhering to the surface of the third lens 103, and then the second opening smoothly. It becomes the structure discharged | emitted from the part 9b.

  By the way, when the lens holder 100 is in an intermediate range between the first range and the second range, both the first opening 9a and the second opening 9b are not completely blocked. Accordingly, in the movable range of the lens holder 100 in diopter adjustment, regardless of the position of the lens holder 100, at least one of the openings 9a and 9b and the eyepiece window 8a are connected via the internal space R. Since the first opening 9a and the second opening 9b are arranged differently in the optical axis direction, the path through which the air flows is switched depending on the diopter adjustment position. Accordingly, it is possible to change the diopter according to the location where the foreign matter is attached, and to efficiently remove the foreign matter with an optimal air flow. Since the surface of the protective glass 5 can be easily cleaned by removing it from the finder device 200, it does not affect the diopter adjustment position.

  By the way, as described above, the viewfinder device 200 is assembled in a relatively clean environment, and dust and dust are strictly controlled. However, it is difficult to prevent foreign matter from being completely mixed. May be found. Even in such a case, by removing the eyepiece cover 1 from the camera body and further removing the screw 7, the detachable member 6, and the protective glass 5 from the finder device 200, the state in which the finder device 200 can be cleaned internally is possible. become.

  Such a cleaning operation is assumed to be a rework process in which dust and dust are not always managed sufficiently. However, the necessary disassembly of the camera body can be kept to a minimum, and foreign matter can be removed only by blowing compressed air with a blower. By taking measures such as inserting a dustproof filter into the blower in the process, it is possible to maintain the assembled state in a clean environment without introducing another new foreign substance into the finder device 200. It is.

  According to the present embodiment, the eyepiece window 8 a is opened on the back side of the cover member 8, and the first opening 9 a and the second opening 9 b connected to the internal space R are formed on the upper surface of the base member 9. Is done. When the detachable member 6 is attached to the cover member 8, the holding portion 6 a of the detachable member 6 holds the protective glass 5 in pressure contact with the cover member 8. Thereby, the protective glass 5 closes the eyepiece window 8a, and the lid portion 6b of the detachable member 6 presses against the upper surface of the base member 9 to close the first opening 9a and the second opening 9b. Since the detachable member 6 is detachable, the openings 9a and 9b can be opened by removing the detachable member 6. Therefore, it is possible to prevent dust inside the finder device 200 at the stage of completion of the assembly as the finder device 200 and to easily clean the inside by removing the detachable member 6 and the like.

  Further, since the pressure contact of the protective glass 5 by the holding portion 6a and the pressure contact of the lid portion 6b to the base member 9 are made by using the elastic force of the detachable member 6, the configuration is simple.

  Further, when the assembling of the finder device 200 is completed, the eyepiece window 8a and the openings 9a and 9b of the base member 9 are closed and the internal space R is sealed. Therefore, it is possible to prevent foreign matter from entering the finder apparatus 200 regardless of the subsequent camera manufacturing process. As described above, foreign matter can be removed by a relatively simple cleaning procedure, but it is difficult to be restricted in the layout of components and the manufacturing process.

  Further, in the movable range of the lens holder 100 in diopter adjustment, at least one of the openings 9a and 9b and the eyepiece window 8a are connected via the internal space R regardless of the position of the lens holder 100. Thereby, the air passage for internal cleaning can be secured regardless of the diopter adjustment position. In particular, when the lens holder 100 is in the first range in the optical axis direction, the first opening 9a and the eyepiece window 8a are connected via the internal spaces Ra to Rc, and are in the second range. The second opening 9b and the eyepiece window 8a are connected via the internal space Rb. Thereby, the passage of the air for internal cleaning can be switched by the diopter adjustment position, and a wide internal range can be cleaned.

  The other end of the guide bar 11 is held in the through hole 8b of the cover member 8, and abuts against the protective glass 5 in a region outside the eyepiece window 8a with respect to the optical axis C0. Thereby, while the protective glass 5 fulfill | performs the retaining function of the guide bar 11, the deformation | transformation of the protective glass 5 can be suppressed. In addition, when the detachable member 6 is attached to the cover member 8, both are electrically connected, so that the influence of static electricity on the proximity sensor 15 can be suppressed.

  Further, when the detachable member 6 is removed with the accessory shoe 4 attached, a clearance CL for ensuring communication between the openings 9a and 9b and the outside air between the base member 9 and the accessory shoe 4. Is formed. Thereby, the inside of the finder apparatus 200 can be cleaned without removing the accessory shoe 4. Moreover, even if the lower surface is covered with the lens barrel, the inside of the finder apparatus 200 can be easily cleaned.

  The finder apparatus 200 of the present invention can be applied to various optical devices such as an imaging apparatus. Further, the imaging apparatus is not limited to a digital still camera, and the present invention can be applied to a video camera or the like.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included.

DESCRIPTION OF SYMBOLS 5 Protective glass 6 Detachable member 8 Cover member 9 Base member 9a 1st opening part 9b 2nd opening part 13 Display panel 100 Lens holder

Claims (10)

A display unit;
A lens group that transmits light from the display unit;
A lens holder for holding the lens group;
A base member that houses the lens holder inside;
A cover member that is disposed closer to the viewer than the display unit and has an eyepiece window that allows light transmitted through the lens group to pass through;
Glass for protecting the eyepiece window;
A finder device having a detachable member attachable to and detachable from the cover member,
The base member is formed with an opening connected to an internal space surrounded by the display unit, the base member, and the cover member,
When the detachable member is attached to the cover member, the detachable member holds the glass, the glass closes the eyepiece window, and the detachable member closes the opening of the base member. Finder device to do.   The said detachable member has a holding part that presses and holds the glass against the cover member by elasticity, and a lid part that presses against the base member by elasticity and closes the opening. The finder device described in 1. Adjusting means for adjusting the diopter by moving the lens holder in the optical axis direction of the lens group;
The opening includes a first opening and a second opening formed at different positions in the optical axis direction,
In the movable range of the lens holder by the adjusting means, regardless of the position of the lens holder, at least one of the first opening and the second opening and the eyepiece window are in the internal space. The finder device according to claim 1, wherein the finder device is connected via a finder.   When the lens holder is in the first range in the optical axis direction, the first opening and the eyepiece window are connected via the internal space, and the lens holder is in the second direction in the optical axis direction. 4. The viewfinder device according to claim 3, wherein when in the range, the second opening and the eyepiece window are connected via the internal space.   When the lens holder is in the first range, the passage between the second opening and the internal space is blocked or narrowed, and when the lens holder is in the second range, The viewfinder device according to claim 3 or 4, wherein a passage between the first opening and the internal space is closed or narrowed. A guide bar for guiding the movement of the lens holder by the adjusting means;
One end of the guide bar is held by the base member,
The other end of the guide bar is held in a through hole formed in the cover member, and the guide bar is outside the eyepiece window with respect to the optical axis when the cover member is attached to the detachable member. The finder device according to any one of claims 3 to 5, wherein the finder device is in contact with the glass in a region.   The detachable member and the cover member are both conductive members, and the detachable member and the cover member are electrically connected in a state where the detachable member is attached to the cover member. Item 7. The finder device according to any one of Items 1 to 6.   An imaging device comprising the finder device according to claim 1. The imaging device has an accessory shoe disposed above the finder device,
When the attachment member is attached and the detachable member of the finder device is removed, a gap is formed between the base member and the accessory shoe to ensure communication between the opening and the outside air. The imaging apparatus according to claim 8, wherein: It has a window part and has external parts that can be attached to and detached from the main body of the imaging device,
10. The imaging device according to claim 8, wherein the external component covers the finder device and exposes the glass from the window portion to an observer side when mounted on the main body.