JP2013092665A - Accessory device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an accessory device capable of preventing a main body and a rotary member from sticking with each other.SOLUTION: A display device 3 has a mounting member 331 as an accessory device which is fixed to an accessory shoe 103 of an imaging apparatus 1. The mounting member 331 includes: a sleeve member 3352 which protrudes from the main body of the display device 3 and has an external thread portion on the outer circumference thereof; a protruding portion 3311 enclosing the sleeve member 3352; and a fixing member 3352 having an internal thread portion, which is screwed over the external thread portion of the sleeve member 3352 on the inner circumference thereof, and which is movable in a direction parallel to a rotation axis to be brought into contact with the front end of the accessory shoe 103 and the protruding portion 3311 by a rotation operation. A spiral surface 331a of the front end of the protruding portion 3311 is brought into contact with the fixing member 3352.

Description

  The present invention relates to an accessory device that can be attached to an imaging apparatus.

  An imaging device such as a digital video camera or a digital still camera can be attached with an external accessory device such as a video light or a microphone in order to enhance the expandability of the photographing function.

  Various proposals have been made regarding a method of attaching an external accessory device, and a method of connecting and fixing an external accessory device to an accessory shoe provided in the main body of the imaging apparatus is generally used. . For example, regarding an accessory device that can be engaged by sliding insertion into an accessory shoe provided on the main body of the imaging device, a structure that prevents the accessory device from sliding off the imaging device main body after being engaged is proposed ( Patent Document 1).

  More specifically, the accessory device described in Patent Document 1 uses a shaft orthogonal to the slide insertion direction with respect to the accessory shoe as a rotation axis, and when the accessory device is rotated in the attachment direction with respect to the accessory shoe, the protruding portion extends in a direction parallel to the rotation axis. Comprises a rotating member protruding. On the other hand, the accessory shoe is provided with a groove for engaging with the protrusion of the rotating member. After the accessory device is slid into the accessory shoe, the rotating member is rotated in the mounting direction to engage the protrusion of the rotating member with the groove of the accessory shoe. Movement in the direction is restricted. Thus, the accessory device is prevented from falling off from the accessory shoe.

JP 2009-157003 A

  However, in the case of the above-described conventional example, when the rotating member is rotated in the direction opposite to the direction in which the accessory device is attached, that is, in the direction in which the accessory device is removed, the rotating member is in contact with the main body of the accessory device. Can continue to turn. At this time, the problem that the surface of the accessory device main body and the rotating member will bite each other, and the surface where the accessory device main body and the rotating member touch the surface are scratched and appear as an external appearance. There is a problem of being damaged.

  An object of the present invention is to provide an accessory device that includes a rotating member for attaching / detaching an imaging apparatus to / from a main body, and the accessory device main body and the rotating member do not easily bite. In addition, the present invention provides an accessory device that can maintain an aesthetic appearance in a good state by making the scratched portion a non-appearance surface even if the contact surface between the main body portion and the rotating member of the accessory device is scratched. The purpose is to do.

  An accessory device according to the present invention is an accessory device including an attaching unit attached to an accessory shoe of an imaging apparatus, and the attaching unit protrudes from a main body portion of the accessory device and has a sleeve member having a male screw portion on an outer periphery thereof; Projecting from the main body of the accessory device and having a projecting portion surrounding the sleeve member and a female threaded portion threadedly engaged with the male threaded portion of the sleeve member on the inner periphery, and the accessory shoe and the distal end surface of the projecting portion by rotating operation A fixing member that is movable in a direction parallel to the rotation axis of the rotation operation so as to come into contact with the front end surface of the protrusion and the contact surface that contacts the front end surface of the protrusion at the fixing member Any of the above is characterized in that it is a continuous spiral surface of one round.

  According to the present invention, when the accessory device is removed from the main body of the imaging device, the main body portion of the accessory device and the rotating member are less likely to bite even if the rotating member is continuously rotated in the removing direction, and the rotating member is difficult to turn. Can be prevented. Further, even if a scratch occurs on the contact surface between the rotating member and the main body of the accessory device, the aesthetic appearance is not impaired because the scratched portion is a non-appearance surface.

It is the perspective view which looked at the imaging device with which the accessory apparatus which concerns on embodiment of this invention is attached from diagonally forward. It is the perspective view which looked at the imaging device of Drawing 1 from back side. It is a perspective view of the holding member which can be attached or detached to the imaging device of FIG. FIG. 4 is a perspective view of a display device that can be attached to and detached from the imaging device of FIG. 1 or the gripping member of FIG. 3. FIG. 5 is a perspective view showing a state where the gripping member of FIG. 3 and the display device of FIG. 4 are mounted on the imaging apparatus of FIG. 1. FIG. 5 is a perspective view showing a state where the display device of FIG. 4 is attached to the imaging device of FIG. 1. FIG. 5 is a rear view of a rear connection portion provided in the display device of FIG. 4. It is a disassembled perspective view of the rear surface connection part provided in the display apparatus of FIG. FIG. 5 is a cross-sectional view illustrating a state in which the rear surface connection portion of the display device of FIG. FIG. 5 is a cross-sectional view showing another mounting form of the gripping member of FIG. 3 and the display device of FIG. 4.

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

<Configuration of main body of imaging device>
1 and 2 are perspective views of an imaging apparatus to which an accessory device according to an embodiment of the present invention is attached. In this embodiment, a digital video camera to which an interchangeable lens 4 (see FIGS. 7 and 8) can be attached is taken up as the imaging device 1. FIG. 1 is a perspective view of the imaging device 1 as viewed from the front and obliquely above, and FIG.

  A grip grip 101 that can be attached to and detached from the imaging device 1 is provided on the left side when viewed from the front (front) of the imaging device 1. On the upper surface of the imaging device 1, a movable viewfinder 102, an accessory shoe 103 used for attaching / detaching an external accessory device such as a gripping member 2 and a display device 3 (see FIGS. 3 to 5) described later, and a gripping member The screw part 104 for fixing 2 is provided.

  On the rear surface of the imaging device 1, a sub display unit 105 that displays the control state of the imaging device 1, an input / output terminal group 106, a recording media mounting unit 107, a REC / PAUSE button 108, a MENU button 109, a MENU operation lever 110, and a battery. A lid 111 is provided. A battery (not shown) is housed inside the battery lid 111.

  On the front surface of the imaging apparatus 1, an interchangeable lens mounting unit 112, a contact unit 113 for detecting and electrically controlling the mounting of the interchangeable lens 4, a lens removal button 114 for removing the interchangeable lens, and REC / A PAUSE button 115 is provided. On the right side when viewed from the front of the image pickup apparatus 1, an operation button group 116 for causing the main body of the image pickup apparatus 1 to execute a predetermined operation by a photographer's operation and a power switch 117 are provided.

  Further, in the image pickup apparatus 1, an image pickup element (not shown) that receives an image of a subject is disposed behind the interchangeable lens mounting portion 112. In addition, the imaging device 1 includes a sensor substrate that converts a video signal obtained by the imaging device into an electrical signal, and a circuit substrate that controls an input signal when the imaging device 1 is operated.

<Configuration of gripping member>
FIGS. 3A and 3B are both perspective views of the holding member 2 that can be attached to and detached from the accessory shoe 103 of the imaging apparatus 1. The gripping member 2 is screwed into a screw portion 104 provided in the imaging device 1, and a dial screw 202 that fixes the gripping member 2 to the imaging device 1, and the dial screw 202 faces the grip portion 209 of the gripping member 2. And an elastic member 203 such as a coil spring for biasing. Further, a foot 201 that engages with the accessory shoe 103 of the imaging device 1 is provided on the bottom surface of the gripping member 2.

  On the upper surface of the gripping member 2, an external accessory shoe 204 for mounting an external accessory device such as a video light and a screw portion 205 for fixing the external accessory device are provided. An accessory shoe 206 for mounting an external accessory device such as the display device 3 is provided on the front surface of the gripping member 2. In this embodiment, the accessory shoe 206 is the same as the accessory shoe 103 of the imaging device 1. Let it be a shape.

<Configuration of display device>
4A and 4B are perspective views of the display device 3 that can be attached to and detached from the accessory shoe 103 of the imaging device 1 or the accessory shoe 206 of the gripping member 2. The display device 3 includes a display unit 31 that displays a captured image, an operation unit 32 that operates the main body of the imaging device 1 when displaying a captured image or a captured image on the display unit 31, and a display device. 3 is attached to the imaging device 1 or the holding member 2.

  The display unit 31 includes an image captured by the imaging device 1 and a display screen unit 311 that enables the photographer to check the control state of the imaging device 1, an exterior member 312 that covers the display screen unit 311, and an electrical signal to the display screen unit 311. A circuit board (not shown) for transmitting. The display unit 31 is freely rotatable by a rotation unit 313.

  The operation unit 32 includes an operation button group 321, an audio signal control unit 322, a protective cover member 323, and a display direction control button 324. The operation button group 321 is a button for causing the main body of the imaging apparatus 1 to execute a predetermined operation by an operation by the photographer. The audio signal control unit 322 controls the audio signal obtained by the external microphone when the external microphone is connected. The protective cover member 323 prevents water droplets or the like from entering the audio signal control unit 322, and the display direction control button 324 controls the display direction of the video displayed on the display unit 31.

  The operation unit 32 transmits and receives signals between a circuit board (not shown) that converts the operation of the operation button group 321 and the audio signal control unit 322 into an electrical signal and the circuit board of the display unit 31, and the display unit 31. And a signal line (not shown) passing through the inside of the operation unit 32. These circuit boards and signal lines are held by exterior members 325 and 326. The exterior member 325 is provided with a storage portion 327 that stores a rotation portion 313 that fastens the display portion 31 in a rotatable manner.

  The attachment portion 33 includes a bottom surface connection portion 334 for fixing the display device 3 to the accessory shoe 103 of the imaging device 1 and a rear surface connection portion 335 for fixing the display device 3 to the accessory shoe 206 of the gripping member 2. The mounting member 331 is provided. Moreover, the attachment part 33 has the microphone holding part 332 which hold | maintains an external microphone, and the connector part 333 which connects the connector of an external microphone.

  The mounting portion 33 is electrically connected to the signal line group 336 that transmits and receives signals, a circuit board (not shown) that relays signals between the signal line group 336 and the operation unit 32, and the circuit board of the operation unit 32. And a signal line (not shown) for performing general connection. The signal transmitted by the signal line group 336 includes a control signal for displaying a captured image on the display screen unit 311 and operating the operation button group 321 of the operation unit 32. The signal transmitted from the signal line group 336 is controlled by the audio signal control unit 322 provided in the operation unit 32 after the audio signal obtained from the external microphone held in the microphone holding unit 332 is controlled. A signal is included for transmission.

<Mounting Form of Holding Member and Display Device to Imaging Device>
FIG. 5 is a perspective view showing a state in which the gripping member 2 and the display device 3 are mounted on the imaging device 1. In FIG. 5, the rear surface connection portion 335 of the display device 3 is connected and fixed to the accessory shoe 206 of the gripping member 2, and the foot portion 201 of the accessory shoe of the gripping member 2 is connected and fixed to the accessory shoe 103 of the imaging device 1. The form used is shown. FIG. 5 shows a state where the interchangeable lens 4 corresponding to the interchangeable lens mounting portion 112 is mounted on the imaging apparatus 1.

<Attaching Form of Display Device to Imaging Device>
FIG. 6 is a perspective view showing a state in which the display device 3 is mounted on the imaging device 1, and shows a form in which the bottom surface connection portion 334 of the display device 3 is directly fixed to the accessory shoe 103 of the imaging device 1. ing. FIG. 6 also shows a state where the interchangeable lens 4 is mounted on the interchangeable lens mounting portion 112 with respect to the imaging apparatus 1.

<Details of rear connection part of display device>
As described above, the rear surface connection portion 335 of the display device 3 is fixed to the accessory shoe 206 of the gripping member 2, and the fixed form is when the bottom surface connection portion 334 of the display device 3 is attached to the accessory shoe 103 of the imaging device 1. It is the same as the fixed form. Therefore, here, a mode in which the rear surface connecting portion 335 provided in the display device 3 is fixed to the accessory shoe 206 of the gripping member 2 will be described in detail. The description of the case where the bottom surface connection portion 334 of the display device 3 is fixed to the accessory shoe 103 of the imaging device 1 is omitted.

  FIG. 7 is a rear view of the rear connection portion 335 provided in the display device 3, and FIG. 8 is an exploded perspective view of the rear connection portion 335. 9 is a cross-sectional view showing a state in which the rear connection portion 335 provided in the display device 3 is attached to the accessory shoe 206 of the gripping member 2, and is a cross-sectional view taken along line AA in FIG. FIG. 9A shows a state in which the rear connection portion 335 is slid on the accessory shoe 206 and the slide of the display device 3 is restricted. On the other hand, FIG. 9B shows a state where the rear surface connecting portion 335 is attached to the accessory shoe 206 but the slide restriction of the display device 3 is released.

  The rear connection portion 335 provided in the display device 3 includes a foot portion 3351, a fixing member 3352, a sleeve member 3353, a retaining pin 3354, a contact member 3355, and an elastic member 3356. The foot portion 3351 is engaged with the accessory shoe 206 of the gripping member 2 by a sliding operation, and the shape thereof is the same as the shape of the foot portion 201 of the gripping member 2.

  An internal thread portion is formed on the inner periphery of the fixing member 3352. The sleeve member 3353 is formed on the attachment member 331 so as to protrude from the main body of the display device 3. On the outer periphery of the sleeve member 3353, a male screw portion that is screwed with the female screw portion of the fixing member 3352 is formed. Therefore, in a state where the fixing member 3352 is screwed to the sleeve member 3353, the fixing member 3352 can be moved in the vertical direction (a direction parallel to the rotation axis of the rotation operation) by the rotation operation.

  The retaining pin 3354 protrudes in a direction parallel to the rotation axis as the fixing member 3352 rotates. The contact member 3355 is made of resin or the like, and moves while being in contact with the fixing member 3352 together with the retaining pin 3354. For example, a coil spring or the like is used as the elastic member 3356, and the retaining pin 3354 is biased toward the accessory shoe 206 side. The rear connection portion 335 is fixed to a support member 3357 formed of a sheet metal or the like disposed in the attachment member 331 of the attachment portion 33 with screws or the like.

  When the fixing member 3352 is rotated in the α direction shown in FIG. 8, the sliding operation of the foot portion 3351 with respect to the accessory shoe 206 is restricted. A cylindrical protrusion 3311 is formed on the attachment member 331 so as to surround the sleeve member 3353. The tip end surface of the protruding portion 3311 is a spiral surface 331a having a continuous spiral shape, and a step is provided at the start and end of the spiral. On the other hand, the fixing member 3352 is formed with a recess for accommodating the protruding portion 3311.

  When the fixing member 3352 is rotated in a direction in which the slide restriction on the accessory shoe 206 of the foot portion 3351 is released (a direction opposite to the α direction), the concave surface 3352a of the concave portion formed inside the fixing member 3352 becomes a protruding portion 3311. In contact with the spiral surface 331a. At this time, as shown in FIG. 9B, the vertical movement amount L1 accompanying the rotation of the fixing member 3352 is set to be smaller than the depth L2 of the concave surface 3352a formed in the fixing member 3352. Yes. Therefore, the contact surface between the concave surface 3352a of the fixing member 3352 and the spiral surface 331a of the protruding portion 3311 is a non-external surface hidden by the fixing member 3352.

  As shown in FIG. 9A, in the state where the display device 3 is slidably regulated with respect to the gripping member 2, the retaining pin 3354 is rotated by the α direction in FIG. It protrudes from the foot part 3351 of the rear connection part 335 by the force of 3356. Thus, the retaining pin 3354 is inserted into the hole of the accessory shoe 206. Therefore, even if the display device 3 is to be detached from the gripping member 2 by the sliding operation in the state of FIG. 9A, the removal operation is restricted by the retaining pin 3354 coming into contact with the accessory shoe 206 of the gripping member 2. The

  When the fixing member 3352 is fully rotated in the α direction in FIG. 8 and the lower surface 3352b of the fixing member 3352 is in a position in contact with the upper surface 206a of the accessory shoe 206 of the gripping member 2, the fixing member 3352 and the accessory shoe 206 are in the plane. Contact. Since a large frictional force is generated by this surface contact, the fixing member 3352 is stably held.

  On the other hand, as shown in FIG. 9B, when the fixing member 3352 is rotated in the direction opposite to the α direction in FIG. Comes out of the hole of the accessory shoe 206. Thereby, the display apparatus 3 can be removed from the holding member 2.

  Even if the fixing member 3352 is fully rotated in the direction opposite to the α direction in FIG. 8 and the concave surface 3352a of the fixing member 3352 contacts the spiral surface 331a of the protruding portion 3311, the contact area between the fixing member 3352 and the mounting member 331 Is a limited area at the tip of the spiral surface 331a. Therefore, since the frictional force between the fixing member 3352 and the attachment member 331 does not increase, the attachment member 331 and the fixation member 3352 are difficult to bite. In this way, the fixing member 3352 is prevented from being difficult to turn, so that the fixing member 3352 can be rotated again in the α direction with a small torque. Further, since the concave surface 3352a of the fixing member 3352 is in contact with the spiral surface 331a of the protruding portion 3311, even if the contact portion of the spiral surface 331a with the concave surface 3352a is scraped, a contact surface is constantly formed with a new limited area. Therefore, durability can be improved. Furthermore, since the contact surface between the spiral surface 331a and the concave surface 3352a is formed inside the fixing member 3352, it is a non-appearance surface. Therefore, even if the contact surface between the spiral surface 331a and the concave surface 3352a is scratched, the scratch is not exposed to the appearance, so that the aesthetic appearance is not impaired.

<Other embodiments>
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. For example, as a modification of the above-described embodiment, another mounting form of the gripping member 2 and the display device 3 is shown in FIG. In this modification, the concave surface provided in the fixing member 3352 is formed as a spiral surface 3352c having a spiral shape with respect to the contact surface between the fixing member 3352 and the attachment member 331. In this case, the contact surface 331b of the protrusion 3311 that contacts the spiral surface 3352c can be a straight surface.

DESCRIPTION OF SYMBOLS 1 Imaging device 2 Holding member 3 Display device 33 Attachment part 331 Attachment member 103 Accessory shoe 201 Foot part 206 Accessory shoe 3311 Protrusion part 331a Spiral surface 3352 Fixing member 3352a Concave surface

Claims (2)

An accessory device comprising attachment means attached to an accessory shoe of an imaging device,
The attachment means includes
A sleeve member protruding from the main body of the accessory device and having a male screw portion on the outer periphery;
Projecting from the main body of the accessory device and surrounding the sleeve member;
It has a female threaded part that engages with the male threaded part of the sleeve member on the inner periphery, and moves in a direction parallel to the rotational axis of the rotational operation so as to come into contact with the accessory shoe and the tip end surface of the protruding part by a rotational operation. A possible fixing member,
One of the front end surface of the projecting portion and the contact surface of the fixing member that contacts the front end surface of the projecting portion is a continuous spiral surface of one round. The fixing member has a concave portion that houses the protruding portion and has a concave surface that comes into contact with the tip end surface of the protruding portion,
The accessory device according to claim 1, wherein a depth of the concave surface is larger than an amount of movement of the fixing member in a direction parallel to the rotation axis.

Images