JP2013137463A - Imaging apparatus and lens hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve positioning accuracy with respect to a light shielding cover of an attachment/detachment ring without altering a configuration of an apparatus body.SOLUTION: An imaging apparatus comprises: an apparatus body having an outer housing provided with a hood attaching part with a screw groove part formed therein, and a lens unit arranged inside the outer housing; and a lens hood that can be attached to or detached from the hood attaching part and limits incidence of light to the lens unit. The lens hood is provided with: a light shielding cover having an incident hole through which light incident on the lens unit passes; and the attachment/detachment ring having a screw part rotated with respect to the light shielding cover and screwed with the screw groove part of the hood attaching part. The attachment/detachment ring is provided with a positioning projection. The light shielding cover is provided with an elastic piece positioned between the positioning projection and hood attaching part when the lens hood is attached to or detached from the hood attaching part. When the screw part is screwed with the screw groove part and the lens food is thereby attached to the hood attaching part, the elastic piece is brought into contact with the apparatus body and elastically deformed toward the positioning projection side. Consequently, the positioning projection is engaged with the elastic piece, and thereby restricting the rotation of the attachment/detachment ring.

Description

  The present technology relates to a technical field regarding an imaging device and a lens hood. Specifically, the light shielding cover and the detachable ring of the lens hood are provided with an elastic piece that is elastically deformed by contact with the apparatus main body and a positioning projection that is engaged with the elastic piece, respectively, and the detachable ring without changing the configuration of the apparatus main body The present invention relates to a technical field for improving the positioning accuracy with respect to a light shielding cover.

  Some imaging apparatuses such as a video camera and a still camera include a lens hood that restricts the incidence of light on the lens of a lens unit in the apparatus body (see, for example, Patent Document 1). The lens hood is detachable from a hood mounting portion provided in the apparatus main body.

  Such an imaging apparatus includes a type in which a screw groove is formed in the hood mounting portion, a screwing portion is formed in the lens hood, and the screwing portion is screwed into the screw groove portion so that the lens hood is attached to the hood mounting portion. .

  In the above-described type of image pickup apparatus, the lens hood is configured by a light shielding cover that restricts the incidence of light on the lens of the lens unit and a detachable ring that is rotated with respect to the light shielding cover, and is screwed into the detachable ring. The lens hood is attached to the apparatus main body by forming the portion and rotating the detachable ring so as to be screwed into the groove portion.

  In addition to the entrance hole for allowing light to enter the lens unit, the light-shielding cover allows flash illumination light, infrared light for night photography, sound output from a speaker, sound input to a microphone, etc. A passage hole is formed, and a notch for passage through which illumination light, infrared light, sound and the like pass is formed in the detachable ring.

  In a state where the detachable ring is rotated and the lens hood is attached to the hood mounting portion, the passage notch formed in the detachable ring is aligned with the passage hole so that illumination light, infrared light, sound, etc. Input and output through the passage hole.

JP 2011-237593 A

  As described above, the lens hood is attached to the hood attachment portion by rotating the attachment / detachment ring and screwing the screw portion into the screw groove portion. Therefore, in the state where the lens hood is attached to the hood attachment portion by the rotation of the attachment / detachment ring, the dimensions, shapes, etc. of the respective portions are designed so that the passage notches of the attachment / detachment ring coincide with the passage holes of the light shielding cover.

  However, since the lens hood and the device main body are structures, depending on the processing accuracy of each part, the position of the passage notch is displaced with respect to the passage hole in the state where the lens hood is attached to the hood attachment part. May interfere with the passage of the car.

  Therefore, it is conceivable to make the passage notch larger in order to prevent the passage notch from being displaced relative to the passage hole so as not to interfere with the passage of light or sound. There is a risk that the rigidity of the ring will be lowered and smooth rotation of the detachable ring may be hindered.

  Further, when the passage notch is made larger, the area on which the finger is put on the detachable ring during rotation is reduced accordingly. It becomes difficult to perform the rotation operation.

  On the other hand, it is conceivable to provide a positioning structure in the apparatus main body so that the passage notch of the detachable ring matches the passage hole of the light shielding cover. However, when the positioning structure is provided in the apparatus main body, the design of the structure of the apparatus main body is reviewed. It is necessary and the manufacturing cost will rise.

  Accordingly, an imaging device and a lens hood of the present technology have an object of overcoming the above-described problems and improving the positioning accuracy of the detachable ring with respect to the light shielding cover without changing the configuration of the apparatus main body.

  First, in order to solve the above-described problem, an imaging apparatus includes an apparatus main body including an outer casing provided with a hood mounting portion in which a thread groove is formed, and a lens unit disposed inside the outer casing; A light shielding cover having a lens hood that is attachable to and detachable from the hood mounting portion and restricts light incident on the lens unit, and the lens hood has an incident hole that transmits light incident on the lens unit; An attachment / detachment ring having a screwing portion that is rotated with respect to the light shielding cover and screwed into a screw groove portion of the hood attachment portion is provided, a positioning protrusion is provided on the attachment / detachment ring, and the lens is provided on the light shielding cover. An elastic piece is provided between the positioning protrusion and the hood mounting portion when the hood is attached to and detached from the hood mounting portion, and the screwing portion is screwed into the screw groove portion. When the lens hood is attached to the hood attachment portion, the elastic piece is brought into contact with the apparatus main body and is elastically deformed toward the positioning protrusion, and the positioning protrusion is engaged with the elastic piece to The rotation is regulated.

  Therefore, in the image pickup apparatus, when the lens hood is attached to the hood attachment portion, the rotation of the attachment / detachment ring is restricted by the elastic piece that is elastically deformed by being in contact with the apparatus main body, and the attachment / detachment ring is against the light shielding cover. It is positioned at a predetermined position.

  Second, in the imaging apparatus described above, the amount of engagement between the positioning protrusion and the elastic piece in the mounting direction of the lens hood with respect to the hood mounting portion is determined when the lens hood is attached to the hood mounting portion. It is desirable that the amount of movement of the detachable ring with respect to the hood mounting portion in the mounting direction when the ring is rotated once is smaller than the moving amount.

  The attachment / detachment ring when the attachment / detachment ring is attached to the hood attachment part by making the engagement amount of the positioning protrusion and the elastic piece smaller than the movement amount of the attachment / detachment ring relative to the hood attachment part when the attachment / detachment ring is rotated once. At the time of rotation before the last one rotation, the detachable ring does not contact the elastic piece.

  Third, in the imaging apparatus described above, it is desirable that a cushion is attached to a surface of the light shielding cover that faces the apparatus main body.

  By attaching the cushion to the surface of the light shielding cover that faces the device main body, the cushion absorbs the variation in the position in the mounting direction of the detachable ring with respect to the hood mounting portion.

  Fourth, in the above-described imaging device, the positioning protrusion is formed with an engagement surface that is in contact with the elastic piece and an inclined surface that is located on the opposite side of the engagement surface in the rotation direction of the detachable ring. It is desirable that the inclined surface is inclined so as to approach the engaging surface as it goes in the protruding direction of the positioning protrusion.

  An inclined surface is formed on the positioning protrusion, and the inclined surface is inclined so as to approach the engaging surface as it goes in the protruding direction of the positioning protrusion, so that the positioning protrusion is elastic when the lens hood is removed from the apparatus main body. The inclined surface slides on the elastic piece when it comes into contact with the piece.

  Fifth, in the imaging apparatus described above, it is desirable that the positioning protrusion is formed integrally with the detachable ring.

  Since the positioning protrusion is formed integrally with the detachable ring, it is not necessary to attach the positioning protrusion to the detachable ring.

  Sixth, in the above-described imaging device, it is desirable that the elastic piece is formed integrally with the light shielding cover.

  By forming the elastic piece integrally with the light shielding cover, it is not necessary to attach the elastic piece to the light shielding cover.

  Seventhly, in the imaging apparatus described above, a passage hole for allowing light or sound to pass through is formed in the light shielding cover, and the positioning projection is engaged with the elastic piece in the attachment / detachment ring so that the attachment / detachment ring rotates. It is desirable to form a notch for passage that coincides with the passage hole when the pressure is restricted.

  A passage hole for allowing light or sound to pass through is formed in the light shielding cover, and the attachment / detachment ring has a passage notch that matches the passage hole when the positioning protrusion is engaged with the elastic piece and the rotation of the attachment / detachment ring is restricted. By being formed, light or sound is inputted / outputted through the passage hole and the passage notch.

  Eighth, in the above-described imaging apparatus, it is desirable that a finger hooking portion for hooking a finger when rotating is provided on the detachable ring.

  By providing the detachable ring with a finger hook portion for hooking a finger during rotation, the finger is placed on the finger hang portion and the detachable ring is rotated.

  Ninthly, in the above-described imaging device, it is desirable that a plurality of the finger-hanging portions are provided apart from each other in the circumferential direction.

  By providing a plurality of finger hooks spaced apart in the circumferential direction, regardless of the rotation position of the attachment / detachment ring, the finger is applied to the finger attachment part and the attachment / detachment ring is rotated.

  Tenth, in the above-described imaging device, it is desirable that the finger-hanging portion is formed in a protruding shape that protrudes in a direction orthogonal to the rotation direction of the detachable ring.

  By forming the finger-hanging portion in a protruding shape that protrudes in a direction perpendicular to the rotation direction of the detachable ring, the finger-hanging portion functions as a reinforcing rib and the rigidity of the detachable ring is increased.

  In order to solve the above-described problems, the lens hood has an outer casing provided with a hood mounting section in which a thread groove is formed, and the hood mounting section of the apparatus main body having a lens unit disposed inside the outer casing. A light-shielding cover that has an incident hole that allows light incident on the lens unit to pass therethrough and that restricts light from entering the lens unit, and is rotated with respect to the light-shielding cover and is screwed on the hood mounting portion. A detachable ring having a threaded portion that is threadedly engaged with the groove portion, and a positioning projection is provided on the detachable ring, and the positioning projection when the lens hood is attached to and detached from the hood mounting portion on the light shielding cover. When an elastic piece positioned between the hood mounting portion and the hood mounting portion is provided, the screwing portion is screwed into the screw groove portion, and the lens hood is attached to the hood mounting portion. The one in which the elastic pieces so as to be contacted to the main assembly of the apparatus is elastically deformed and the positioning protrusion rotation of the detachable ring is engaged with the resilient piece is restricted to.

  Accordingly, in the lens hood, when the lens hood is attached to the hood attachment portion, the rotation of the attachment / detachment ring is regulated by the elastic piece that is elastically deformed by contact with the apparatus body, and the attachment / detachment ring is in a predetermined position with respect to the light shielding cover. Is positioned.

  The imaging apparatus according to an embodiment of the present technology includes an apparatus main body including an outer casing provided with a hood mounting portion in which a thread groove portion is formed, and a lens unit disposed inside the outer casing, and is detachable from the hood mounting portion. A lens hood that restricts the incidence of light on the lens unit, the lens hood having an incident hole that transmits light incident on the lens unit, and the hood attached to the hood that is rotated with respect to the light shielding cover. A detachable ring having a threaded portion that is threadedly engaged with a thread groove portion of the portion, a positioning protrusion is provided on the detachable ring, and the lens hood is attached to and detached from the hood attaching portion on the light shielding cover And an elastic piece positioned between the positioning protrusion and the hood mounting portion, and the screwing portion is screwed into the screw groove portion so that the lens hood is attached to the hood. When the elastic piece is attached to the apparatus body, the elastic piece comes into contact with the apparatus main body and is elastically deformed toward the positioning protrusion, and the positioning protrusion is engaged with the elastic piece to restrict the rotation of the detachable ring. Yes.

  Therefore, the positioning accuracy of the detachable ring with respect to the light shielding cover can be improved without changing the configuration of the apparatus main body.

  In the technique described in claim 2, the amount of engagement between the positioning protrusion and the elastic piece in the mounting direction of the lens hood with respect to the hood mounting portion is determined when the lens hood is mounted on the hood mounting portion. The amount of movement of the detachable ring relative to the hood mounting portion in the mounting direction when the detachable ring is rotated once is smaller.

  Therefore, the detachable ring can be securely attached to the hood mounting portion without hindering the rotation of the detachable ring.

  In the technique described in claim 3, a cushion is attached to a surface of the light shielding cover that faces the device main body.

  Therefore, it is possible to attach the lens hood in a stable state with no backlash at the hood attachment portion.

  In the technique described in claim 4, the positioning protrusion includes an engagement surface that is in contact with the elastic piece and an inclined surface that is located on the opposite side of the engagement surface in the rotation direction of the detachable ring. And the inclined surface is inclined so as to approach the engaging surface as it goes in the protruding direction of the positioning protrusion.

  Therefore, when the lens hood is detached from the apparatus main body, the smooth rotation of the detachable ring can be maintained, and the lens hood can be reliably removed from the apparatus main body.

  In the technique described in claim 5, the positioning protrusion is formed integrally with the detachable ring.

  Therefore, the manufacturing cost can be reduced by reducing the number of parts.

  In the technique described in claim 6, the elastic piece is formed integrally with the light shielding cover.

  Therefore, the manufacturing cost can be reduced by reducing the number of parts.

  In the technique described in claim 7, a passage hole for allowing light or sound to pass through is formed in the light shielding cover, and the positioning protrusion is engaged with the elastic piece in the attachment / detachment ring, so that the attachment / detachment ring A passage notch is formed that matches the passage hole when rotation is restricted.

  Therefore, light or sound can pass through the passage hole and passage notch without reducing the output.

  In the technique described in claim 8, the detachable ring is provided with a finger hook portion for hooking a finger during rotation.

  Therefore, the rotation operation of the detachable ring can be easily performed.

  In the technique described in claim 9, a plurality of the finger-hanging portions are provided apart from each other in the circumferential direction.

  Therefore, the rotation operation of the detachable ring can be easily performed regardless of the rotation position of the detachable ring.

  In the technique described in claim 10, the finger-hanging portion is formed in a protruding shape that protrudes in a direction perpendicular to the rotation direction of the detachable ring.

  Accordingly, the finger-hanging portion functions as a reinforcing rib to increase the rigidity of the detachable ring, and even when the detachable ring is pressed with a finger during the rotation of the detachable ring, it is difficult to bend, and the detachable ring can be rotated smoothly.

  The lens hood of the present technology is detachable from the hood mounting portion of the apparatus main body having an outer casing provided with a hood mounting portion in which a thread groove portion is formed and a lens unit disposed inside the outer casing, A light-shielding cover having an incident hole through which light incident on the lens unit is transmitted and restricting light incidence on the lens unit; and a screw that is rotated with respect to the light-shielding cover and screwed into the threaded groove portion of the hood mounting portion. A detachable ring having a joint portion, the detachable ring is provided with a positioning projection, and when the lens hood is attached to and detached from the hood mounting portion on the light shielding cover, the positioning projection and the hood mounting portion An elastic piece is provided between the elastic piece and the screw piece is screwed into the screw groove and the lens hood is attached to the hood attachment part. Rotation of the detachable ring the positioning protrusion is brought into contact with the body is elastically deformed is engaged with the elastic pieces are to be regulated.

  Therefore, the positioning accuracy of the detachable ring with respect to the light shielding cover can be improved without changing the configuration of the apparatus main body.

  The best mode for carrying out the imaging device and the lens hood of the present technology will be described below with reference to the accompanying drawings.

  In the best mode described below, the imaging device of the present technology is applied to a video camera, and the imaging device of the present technology is applied to a lens hood in the video camera.

  The application ranges of the imaging device and the lens hood of the present technology are not limited to the video camera and the lens hood in the video camera, respectively. The imaging device and the lens hood of the present technology can be widely applied to, for example, other imaging devices such as a still camera or a lens hood in these imaging devices.

  In the following description, it is assumed that the front, rear, top, bottom, left, and right directions are shown as viewed from the photographer when the video camera is photographed. Therefore, the subject side is the front and the photographer side is the rear.

  In addition, the following directions of front and rear, up, down, left, and right shown below are for convenience of explanation, and the implementation of the present technology is not limited to these directions.

[Configuration of imaging device]
The imaging apparatus 1 includes an apparatus main body 2 and a lens hood 50 that is attached to and detached from the apparatus main body 2 (see FIGS. 1 and 2).

  The apparatus main body 2 is configured by arranging required parts inside and outside the outer casing 3. The outer casing 3 is formed in, for example, a vertically long case shape, and is provided as a storage case portion 5 having a front end portion provided as a front panel portion 4 and an upper end portion at a rear end portion opened rearward.

  Microphones 6 and 6, an interface cover 7 and operation switches 8 and 8 are arranged in this order from the front side on the upper surface 3 a of the outer casing 3. The operation switches 8 and 8 are, for example, a zoom lever and a photographing button.

  Various operation buttons 9 such as a power button and an image reproduction button are disposed on one side surface 3b of the outer casing 3. A memory card 10 is mounted on one side surface 3 b of the outer casing 3.

  On the rear surface 3c of the outer casing 3, operation buttons 11 and 11 such as a mode switching button and a recording button are arranged.

  A battery 12 is mounted on the rear surface of the outer casing 3, and a part of the battery 12 projects rearward from the rear surface 3 c of the outer casing 3.

  The front panel portion 4 is formed in a substantially annular shape, and the front surface portion 13 and the outer peripheral surface portion 14 projecting rearward from the outer peripheral edge of the front surface portion 13, and the hood mounting portion 15 projecting rearward from the inner peripheral edge of the front surface portion 13 and the hood. And an annular inner flange portion 16 projecting inward from the rear edge of the attachment portion 15. A screw groove 15 a is formed on the inner peripheral surface of the hood attachment portion 15.

  The front panel portion 4 is provided with a frame portion 17 having a circular outer shape, and the frame portion 17 is formed with a rectangular opening 17a. The outer periphery of the frame portion 17 is continuous with the rear edge of the inner flange portion 16.

  A flash 18 is disposed at the upper end of the front panel unit 4. The flash 18 is used during night photography and the like, and auxiliary light is emitted forward from the flash 18.

  A display unit 19 is rotatably and rotatably connected to the side surface of the outer casing 3. The display unit 19 has a front end connected to the outer casing 3 and has a display surface 19a.

  A finder 20 is connected to the rear end portion of the apparatus main body 2, and the finder 20 is slidable in the front-rear direction with respect to the storage case portion 5.

  As shown in FIGS. 3 to 5, the finder 20 includes a slide support portion 21 extending in the front-rear direction and an eyepiece frame portion 22 attached to the rear end portion of the slide support portion 21. For example, a diopter adjustment dial is disposed on the upper surface of the slide support unit 21 as the operation unit 23.

  The viewfinder 20 slides between a storage position (see FIG. 3) where the portion excluding the eyepiece frame portion 22 is stored in the storage case portion 5 and a pull-out position (see FIG. 4) where it is slid and pulled out from the storage case portion 5. It is possible. Further, the finder 20 can be rotated in the tilt direction with the front end portion of the slide support portion 21 as a fulcrum in the pulled-out position (see FIG. 5).

  A lens unit 24 is disposed inside the outer casing 3 (see FIG. 1). The lens unit 24 has a lens barrel and a plurality of lenses arranged inside the lens barrel.

  The lens hood 50 includes a light shielding cover 51 and a detachable ring 52 (see FIGS. 6 and 7).

  The light shielding cover 51 is formed by connecting a front cabinet 53 and a rear cabinet 54 at the front and rear by, for example, screwing or the like.

  The front cabinet 53 includes a base surface portion 55 that faces in the front-rear direction and a peripheral surface portion 56 that protrudes substantially forward from the outer peripheral portion of the base surface portion 55. The base surface portion 55 is formed with a first incident hole 55a having a large opening area and a first passage hole 55b positioned above the first incident hole 55a.

  The rear cabinet 54 includes a base surface portion 57 that faces in the front-rear direction and a peripheral portion 58 that protrudes substantially forward from the outer peripheral portion of the base surface portion 57. The base surface portion 57 is formed with a circular second incident hole 57a and a second passage hole 57b continuous with the second incident hole 57a.

  The inner peripheral portion of the base surface portion 57 is provided as a ring support portion 59 formed in a flange shape projecting inward (see FIG. 8). The ring support portion 59 is integrally provided with an elastic piece 60 by being partially cut away. The elastic piece 60 includes a deformable portion 60a extending in the circumferential direction and a restricting portion 60b continuous to the tip (lower end) of the deformable portion 60a. The elastic piece 60 can be elastically deformed substantially in the front-rear direction.

  In a state where the elastic piece 60 is not elastically deformed, the elastic piece 60 is inclined so as to be displaced rearward as it approaches the restricting portion 60b.

  A plurality of cushions 61, 61, 61 are attached to the rear surface of the ring support portion 59 so as to be spaced apart from each other in the circumferential direction.

  As described above, in the lens hood 50, since the elastic piece 60 is formed integrally with the rear cabinet 54 of the light shielding cover 51, the manufacturing cost can be reduced by reducing the number of parts.

  The detachable ring 52 is formed by integrally forming an annular attached portion 62 and a rotation operation portion 63 projecting outward from a portion excluding the upper end portion of the front end portion of the attached portion 62 (see FIG. 9). ).

  A threaded portion 62 a is formed on the outer peripheral surface of the attached portion 62.

  The rotation operation part 63 is formed in an arc shape, and a notch formed at the upper end of the rotation operation part 63 is formed as a passing notch 63a. The rotation operation unit 63 is provided with finger hooks 63b, 63b,... At equal intervals in the circumferential direction on the front side. The finger hooks 63b, 63b,... Protrude forward while extending in the radial direction.

  A positioning protrusion 64 that protrudes rearward is integrally provided on the rear surface of the rotation operation portion 63. The positioning protrusion 64 includes a plane 64a facing rearward, an engagement surface 64b that is continuous with one edge in the circumferential direction of the plane 64a and substantially orthogonal to the plane 64a, and the other edge in the circumferential direction of the plane 64a. And an inclined surface 64c that is separated from the flat surface 64a as it goes forward.

  As described above, in the lens hood 50, since the positioning protrusion 64 is integrally formed with the attached portion 62 of the detachable ring 52, the manufacturing cost can be reduced by reducing the number of parts.

  The detachable ring 52 is attached to the light-shielding cover 51 by connecting the front cabinet 53 and the rear cabinet 54 at the front and rear in a state in which the rotation operation unit 63 is disposed facing the front surface of the ring support unit 59 of the rear cabinet 54. It is supported rotatably. In a state in which the detachable ring 52 is supported by the light shielding cover 51, the attached portion 62 protrudes rearward from the outer peripheral portion of the second incident hole 57 a of the rear cabinet 54, and the rotation operation portion 63 is the second portion of the front cabinet 53. It is located on the rear side of the outer peripheral portion of one incident hole 55a, and the operation from the front with respect to the rotation operation portion 63 is enabled (see FIG. 10).

[Removal of lens hood in imaging device]
Hereinafter, an attaching / detaching operation of the lens hood 50 with respect to the apparatus body 2 in the imaging apparatus 1 will be described (see FIGS. 11 to 15). Note that FIGS. 11 to 15 relating to the attaching / detaching operation show a simplified structure for easy understanding.

  To attach the lens hood 50 to the apparatus main body 2, first, the attached portion 62 of the detachable ring 52 is pressed against the hood attaching portion 15 of the front panel portion 4. At this time, the first incident hole 55 a and the second incident hole 55 b of the light shielding cover 51 are positioned in front of the flash 18.

  Next, the detachable ring 52 is rotated with respect to the light shielding cover 51. The attachment / detachment ring 52 is rotated by placing a finger on the finger hooks 63b, 63b,.

  As described above, since the attaching / detaching ring 52 is provided with the finger-hanging parts 63b, 63b,..., The attaching / detaching ring 52 can be easily rotated.

  In addition, since a plurality of finger hooks 63b, 63b,... Are provided in the circumferential direction, the detachable ring 52 can be easily rotated regardless of the rotation position of the detachable ring 52.

  Furthermore, since the finger-hanging portions 63b, 63b,... Are formed in a protruding shape that protrudes in a direction orthogonal to the rotation direction of the detachable ring 52, the finger-hanging portions 63b, 63b,. The rigidity of the detachable ring 52 is increased.

  Therefore, even if the detachable ring 52 is pressed with a finger when the detachable ring 52 is rotated, the detachable ring 52 is difficult to bend, and the rotating operation of the detachable ring 52 can be performed smoothly.

  When the detachable ring 52 is rotated with respect to the light shielding cover 51, the screwing portion 62 a is screwed into the screw groove portion 15 a of the hood mounting portion 15, and the detachable ring 52 is coupled to the hood mounting portion 15. Then, the light shielding cover 51 is moved rearward as the attachment / detachment ring 52 rotates (see FIG. 11). At this time, the elastic piece 60 provided on the rear cabinet 54 of the light shielding cover 51 is not elastically deformed, and the positioning protrusion 64 provided on the detachable ring 52 is moved in front of the elastic piece 60 to define the elastic piece 60. Not touched.

  When the detachable ring 52 is further rotated with respect to the light shielding cover 51, the screwing portion 62a is further screwed into the screw groove portion 15a, and the detachable ring 52 is coupled to the hood mounting portion 15. 51 is further moved rearward along with the rotation of the detachable ring 52 (see FIG. 12). At this time, the restricting portion 60b of the elastic piece 60 is brought into contact with the front surface of the outer casing 3, the deforming portion 60a is deformed, and the restricting portion 60b is moved forward.

  When the detachable ring 52 is continuously rotated with respect to the light shielding cover 51, the engagement surface 64 b of the positioning protrusion 64 in the detachable ring 52 is engaged with the restricting portion 60 b of the elastic piece 60 and the rotation of the detachable ring 52 is restricted. (See FIG. 13).

  In a state where the rotation of the attachment / detachment ring 52 is restricted and stopped, the passage notch 63a of the attachment / detachment ring 52 is aligned with the first passage hole 55b and the second passage hole 57b of the light shielding cover 51.

  Engagement of the engagement surface 64b of the positioning protrusion 64 with the restricting portion 60b of the elastic piece 60 is performed in the last rotation when the detachable ring 52 is attached to the hood attachment portion 15.

  In other words, in the lens hood 50, the engagement amount (L shown in FIG. 13) of the positioning protrusion 64b and the elastic piece 60 in the attachment direction (front-rear direction) with respect to the hood attachment portion 15 causes the attachment / detachment ring 52 to rotate once. The movement amount (one pitch) of the detachable ring 52 with respect to the hood mounting portion 15 in the mounting direction is smaller.

  Therefore, when the detachable ring 52 is attached to the hood attachment portion 15, the detachable ring 52 is smoothly rotated without contacting the elastic piece 60 when the detachable ring 52 is rotated before the last one rotation. The detachable ring 52 can be securely attached to the hood attachment portion 15 without hindering the rotation of the ring 52.

  Further, the cushions 61, 61, 61 are elastically deformed immediately before the attachment / detachment ring 52 contacts the elastic piece 60 when the attachment / detachment ring 52 is attached to the hood attachment portion 15, and the attachment direction of the attachment / detachment ring 52 to the hood attachment portion 15 is Variations in position are absorbed.

  Therefore, the lens hood 50 can be attached to the hood attachment portion 15 in a stable state without any backlash.

  The lens hood 50 can be detached from the apparatus main body 2 by rotating the detachable ring 52 in the direction opposite to that at the time of attachment. The rotation operation of the detachable ring 52 at the time of detachment can also be easily performed by performing a finger operation on the finger-hanging portions 63b, 63b,.

  When the lens hood 50 is removed from the apparatus main body 2, the positioning protrusion 64 of the detachable ring 52 may come into contact with the elastic piece 60 of the light shielding cover 51 due to the dimensional accuracy of each part. In this case, the inclined surface 64c of the positioning protrusion 64 is slid by the restricting portion 60b of the elastic piece 60 (see FIG. 14), and then, the elastic piece 60 is elastically deformed, so that the flat surface 64a of the positioning protrusion 64 is formed. It is slid by the restricting portion 60b (see FIG. 15).

  Therefore, when the lens hood 50 is detached from the apparatus main body 2, the smooth rotation operation of the detachable ring 52 can be maintained, and the lens hood 50 can be reliably detached from the apparatus main body 2.

  In the above, an example in which the inclined surface 64a is formed on the positioning projection 64 and the attachment / detachment ring 52 rotates smoothly is shown, but conversely, the attachment / detachment ring 52 is inclined in order to smoothly rotate the elastic piece. It is also possible to form a surface.

[One Embodiment of Imaging Device]
FIG. 16 is a block diagram of a video camera according to an embodiment of the imaging device of the present technology.

  An imaging device (video camera) 100 (corresponding to the imaging device 1) includes a camera block 70 that is responsible for an imaging function, a camera signal processing unit 71 that performs signal processing such as analog-digital conversion of a captured image signal, and an image signal. And an image processing unit 72 for performing the recording / reproducing process. The imaging apparatus 100 also writes image signals to an image display unit 73 (corresponding to the display unit 19) such as a liquid crystal panel that displays a captured image and the like, and a memory card 1000 (corresponding to the memory card 10). An input unit 76 (operation) including an R / W (reader / writer) 74 that performs reading, a CPU (Central Processing Unit) 75 that controls the entire imaging apparatus 100, and various switches that are operated by a user. Switch 8, operation button 9, operation button 11, and operation unit 23), and a lens drive control unit 77 that controls the driving of the lenses arranged in the camera block 70.

  The camera block 70 includes an optical system including a lens group 78 (corresponding to a lens group provided in the lens unit 24), an imaging element 79 such as a CCD (Charge Coupled Device) and a CMOS (Complementary Metal-Oxide Semiconductor). It is configured.

  The camera signal processing unit 71 performs various signal processing such as conversion of the output signal from the image sensor 79 into a digital signal, noise removal, image quality correction, and conversion into a luminance / color difference signal.

  The image processing unit 72 performs compression encoding / decompression decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like.

  The image display unit 73 has a function of displaying various data such as an operation state of the user input unit 76 and a captured image.

  The R / W 74 writes the image data encoded by the image processing unit 72 to the memory card 1000 and reads the image data recorded on the memory card 1000.

  The CPU 75 functions as a control processing unit that controls each circuit block provided in the imaging apparatus 100, and controls each circuit block based on an instruction input signal from the input unit 76.

  The input unit 76 includes, for example, a shutter release button for performing a shutter operation, a selection switch for selecting an operation mode, and the like, and outputs an instruction input signal corresponding to an operation by the user to the CPU 75.

  The lens drive control unit 77 controls a motor (not shown) that drives each lens of the lens group 78 based on a control signal from the CPU 75.

  The memory card 1000 is a semiconductor memory that can be attached to and detached from a slot connected to the R / W 74, for example.

  Hereinafter, an operation in the imaging apparatus 100 will be described.

  In the shooting standby state, under the control of the CPU 75, the image signal captured by the camera block 70 is output to the image display unit 73 via the camera signal processing unit 71 and displayed as a camera through image. When an instruction input signal for zooming is input from the input unit 76, the CPU 75 outputs a control signal to the lens drive control unit 77, and a predetermined lens group 78 is controlled based on the control of the lens drive control unit 77. The lens is moved.

  When a shutter (not shown) of the camera block 70 is operated by an instruction input signal from the input unit 76, the captured image signal is output from the camera signal processing unit 71 to the image processing unit 72 and subjected to compression coding processing. Converted to data format digital data. The converted data is output to the R / W 74 and written to the memory card 1000.

  Focusing and zooming are performed by the lens drive control unit 77 moving a predetermined lens of the lens group 78 based on a control signal from the CPU 75.

  When playing back image data recorded on the memory card 1000, predetermined image data is read from the memory card 1000 by the R / W 74 in response to an operation on the input unit 76, and decompressed and decoded by the image processing unit 72. After the processing is performed, the reproduced image signal is output to the image display unit 73 and the reproduced image is displayed.

[Summary]
As described above, in the imaging apparatus 1, when the lens hood 50 is attached to the hood attaching portion 15, the elastic piece 60 is brought into contact with the apparatus main body 2 to be elastically deformed, and the positioning protrusion 64 is set to the elastic piece 60. The rotation of the attachment / detachment ring 52 is restricted by being engaged with the restriction part 60b.

  Therefore, the positioning accuracy of the detachable ring 52 with respect to the light shielding cover 51 can be improved without changing the configuration of the apparatus main body 2.

  Further, when the positioning projection 64 is engaged with the elastic piece 60 and the rotation of the detachable ring 52 is restricted by the light shielding cover 51, the first passage hole 55 b and the second passage hole 57 b of the light shielding cover 51 are formed. A matching notch 63a is formed.

  Therefore, the light emitted from the flash 18 through the first passage hole 55b, the second passage hole 57b, and the passage notch 63a can be passed without reducing the light amount.

[Others]
The above shows an example in which the flash 18 is disposed in the apparatus main body 2 and light emitted from the flash 18 passes through the first passage hole 55b, the second passage hole 57b, and the passage notch 63a. In the imaging device 1, the light emitted from the flash 18 is not limited to being passed through the passage hole and the passage notch.

  For example, if the device main body 2 is provided with a video light, an infrared light emitting unit (night flash) for night illumination, an infrared light receiving unit for a remote control device, a speaker, a microphone, etc. It may be configured such that light or sound is transmitted through the passage hole and the passage notch.

[Technology]
The present technology can be configured as follows.

  (1) An apparatus main body having an outer casing provided with a hood mounting portion in which a thread groove portion is formed, and a lens unit disposed inside the outer casing, and detachable from the hood mounting portion. A lens hood that restricts the incidence of light, the lens hood having an incident hole for transmitting light incident on the lens unit, and a screw that is rotated with respect to the light shielding cover and screwed to the hood mounting portion. A detachable ring having a threaded portion that is threadedly engaged with the groove portion, a positioning projection is provided on the detachable ring, and the positioning when the lens hood is attached to and detached from the hood mounting portion on the light shielding cover An elastic piece is provided between the protrusion and the hood mounting portion, and the lens hood is attached to the hood mounting portion by screwing the screwing portion into the screw groove portion. The image pickup apparatus is configured such that when the elastic piece comes into contact with the apparatus main body and is elastically deformed toward the positioning protrusion, the positioning protrusion is engaged with the elastic piece and the rotation of the detachable ring is restricted. .

  (2) The amount of engagement between the positioning protrusion and the elastic piece in the mounting direction of the lens hood with respect to the hood mounting portion is determined when the attachment / detachment ring is rotated once when the lens hood is mounted on the hood mounting portion. The imaging device according to (1), wherein the amount of movement of the detachable ring with respect to the hood mounting portion in the mounting direction is smaller than the moving amount.

  (3) The imaging device according to (1) or (2), wherein a cushion is attached to a surface of the light shielding cover that faces the device main body.

  (4) The positioning protrusion is formed with an engagement surface that is in contact with the elastic piece and an inclined surface that is located on the opposite side of the engagement surface in the rotation direction of the detachable ring, and the inclined surface is the positioning member The imaging device according to any one of (1) to (3), wherein the imaging device is inclined so as to approach the engagement surface as it goes in a protruding direction of the protrusion.

  (5) The imaging apparatus according to any one of (1) to (4), wherein the positioning protrusion is formed integrally with the detachable ring.

  (6) The imaging device according to any one of (1) to (5), wherein the elastic piece is formed integrally with the light shielding cover.

  (7) A passage hole for allowing light or sound to pass through is formed in the light shielding cover, and the passage is made when the positioning protrusion is engaged with the elastic piece and the rotation of the attachment / detachment ring is restricted in the attachment / detachment ring. The imaging device according to any one of (1) to (6), wherein a passage notch that matches the hole is formed.

  (8) The imaging device according to any one of (1) to (7), wherein the detachable ring is provided with a finger hook portion for hooking a finger during rotation.

  (9) The imaging device according to (8), wherein a plurality of the finger-hanging portions are provided apart from each other in the circumferential direction.

  (10) The imaging device according to (8) or (9), wherein the finger-hanging portion is formed in a protruding shape that protrudes in a direction orthogonal to a rotation direction of the detachable ring.

  (11) The hood mounting portion of the apparatus main body having an outer casing provided with a hood mounting portion formed with a thread groove and a lens unit disposed inside the outer casing can be attached to and detached from the lens unit. A light-shielding cover that has an incident hole for transmitting incident light and restricts the incidence of light on the lens unit; and a screwing portion that is rotated with respect to the light-shielding cover and is screwed into a screw groove portion of the hood mounting portion. A positioning projection provided on the attachment / detachment ring, and the light shielding cover is positioned between the positioning projection and the hood attachment portion when the lens hood is attached / detached to / from the hood attachment portion. The elastic piece is brought into contact with the apparatus main body when the screwing portion is screwed into the screw groove portion and the lens hood is attached to the hood attaching portion. Lens hood is elastically deformed and the positioning protrusion and the rotation of the engaged with the detachable ring is restricted to the elastic piece.

  The specific shapes and structures of the respective parts shown in the best mode described above are merely examples of the implementation of the present technology, and the technical scope of the present technology is limited by these. It should not be interpreted in a general way.

The image pickup apparatus and the lens hood of the present technology are shown together with FIGS. 2 to 16, and this figure is a perspective view of the image pickup apparatus. It is a perspective view of the imaging device shown in the state seen from the direction different from FIG. It is an expansion perspective view which shows the state which has a finder in a storage position. It is an expansion perspective view which shows the state which has a finder in a drawer position. It is an expansion perspective view which shows the state by which the finder was rotated in the extraction position. It is a disassembled perspective view of a lens hood. It is a perspective view of a lens hood. It is an expansion perspective view which shows the rear side cabinet of a lens hood. It is an expansion perspective view which shows the attachment / detachment ring of a lens hood. It is a front view which shows the state in which the lens hood was attached to the hood attachment part. FIGS. 12 to 15 show the attachment / detachment operation of the lens hood with respect to the apparatus main body, and this figure is an enlarged sectional view showing a state in which the attachment / detachment ring is being rotated when the lens hood is attached to the apparatus main body. . FIG. 12 is an enlarged cross-sectional view illustrating a state where the elastic piece of the light shielding cover is in contact with the apparatus main body and elastically deformed following FIG. 11. FIG. 13 is an enlarged cross-sectional view illustrating a state in which the positioning protrusion of the detachable ring is engaged with the elastic piece and the rotation of the detachable ring is restricted following FIG. 12. It is an expanded sectional view which shows the state in which the inclined surface of the positioning protrusion contacted the elastic piece at the time of removal from the apparatus main body of a lens hood. FIG. 15 is an enlarged cross-sectional view illustrating a state in which the plane of the positioning protrusion is slid on the elastic piece following FIG. 14. It is a block diagram of an imaging device.

  DESCRIPTION OF SYMBOLS 1 ... Imaging device, 2 ... Apparatus main body, 3 ... Outer casing, 15 ... Hood attaching part, 15a ... Screw groove part, 24 ... Lens unit, 50 ... Lens hood, 51 ... Shading cover, 52 ... Detachable ring, 55a ... 1st Incident hole, 55b ... first passage hole, 57a ... second incidence hole, 57b ... second passage hole, 60 ... elastic piece, 61 ... cushion, 62a ... screwed portion, 63a ... pass notch, 63b ... Finger hooking part, 64 ... Positioning protrusion, 64b ... Engaging surface, 64c ... Inclined surface, 100 ... Imaging device

Claims (11)

An apparatus main body having an outer casing provided with a hood mounting portion in which a thread groove portion is formed, and a lens unit disposed inside the outer casing;
A lens hood that is attachable to and detachable from the hood mounting portion and restricts the incidence of light on the lens unit;
The lens hood has a light-shielding cover having an incident hole for transmitting light incident on the lens unit, and a detachment having a screwing portion that is rotated with respect to the light-shielding cover and screwed into a screw groove portion of the hood mounting portion. A ring is provided,
A positioning protrusion is provided on the detachable ring,
The light shielding cover is provided with an elastic piece positioned between the positioning protrusion and the hood mounting portion when the lens hood is attached to and detached from the hood mounting portion.
When the threaded portion is screwed into the threaded groove portion and the lens hood is attached to the hood mounting portion, the elastic piece is brought into contact with the apparatus main body and is elastically deformed toward the positioning protrusion, and the positioning protrusion. An image pickup apparatus that is engaged with the elastic piece to restrict the rotation of the detachable ring. The mounting direction when the mounting amount of the positioning protrusion and the elastic piece in the mounting direction of the lens hood with respect to the hood mounting portion is such that the detachable ring is rotated once when the lens hood is mounted on the hood mounting portion. The imaging device according to claim 1, wherein the amount of movement of the detachable ring relative to the hood mounting portion is smaller than a moving amount of the detachable ring. The imaging device according to claim 1, wherein a cushion is attached to a surface of the light shielding cover that faces the device main body. Forming an engaging surface in contact with the elastic piece and an inclined surface located on the opposite side of the engaging surface in the rotation direction of the detachable ring on the positioning protrusion;
The imaging device according to claim 1, wherein the inclined surface is inclined so as to approach the engaging surface as it goes in a protruding direction of the positioning protrusion. The imaging device according to claim 1, wherein the positioning protrusion is formed integrally with the detachable ring. The imaging device according to claim 1, wherein the elastic piece is formed integrally with the light shielding cover. A passage hole through which light or sound passes is formed in the light shielding cover,
The imaging according to claim 1, wherein the detachable ring is formed with a notch for passing that matches the passage hole when the positioning protrusion is engaged with the elastic piece and rotation of the detachable ring is restricted. apparatus. The imaging device according to claim 1, wherein the detachable ring is provided with a finger hooking portion for hooking a finger during rotation. The imaging device according to claim 8, wherein a plurality of the finger hanging portions are provided apart from each other in the circumferential direction. The imaging device according to claim 8, wherein the finger-hanging portion is formed in a protruding shape that protrudes in a direction orthogonal to a rotation direction of the detachable ring. It is detachable from the hood mounting portion of the apparatus main body having an outer casing provided with a hood mounting portion in which a thread groove portion is formed and a lens unit arranged inside the outer casing,
A light-shielding cover that has an incident hole that transmits light incident on the lens unit and restricts the incidence of light on the lens unit;
A detachable ring having a screwing portion that is rotated with respect to the light shielding cover and screwed into a screw groove portion of the hood mounting portion;
A positioning protrusion is provided on the detachable ring,
The light shielding cover is provided with an elastic piece positioned between the positioning protrusion and the hood mounting portion when the lens hood is attached to and detached from the hood mounting portion.
When the threaded portion is threadedly engaged with the threaded groove portion and the lens hood is attached to the hood attaching portion, the elastic piece comes into contact with the apparatus main body and is elastically deformed, and the positioning protrusion engages with the elastic piece. A lens hood that is coupled to restrict the rotation of the detachable ring.

Images