JP2008052155A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of restraining an increase in the number of components. <P>SOLUTION: In the video camera 10 (imaging apparatus), a shutter device section 30 has: a shutter substrate 31 having a shutter opening 31a therein; one shutter vane 32 rotatably mounted on the shutter substrate 31, capable of opening or closing the shutter opening 31a, and having a diaphragm hole 32a for decreasing a quantity of light entering the shutter opening 31a of the shutter substrate 31; and one stepping motor 33 for rotating the one shutter vane 32. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an imaging apparatus, and more particularly to an imaging apparatus including a shutter substrate provided with a shutter opening.

  Conventionally, an imaging device including a shutter substrate provided with a shutter opening is known (see, for example, Patent Documents 1 to 4).

  In Patent Document 1, a shutter substrate provided with an opening, a shutter sector (shutter blade) that is rotatably supported by the shutter substrate, and that can open and close the opening of the shutter substrate, and an aperture hole ( An imaging apparatus including an aperture sector (diaphragm blade) having a small hole and one drive source (stepping motor) is disclosed. In the imaging apparatus disclosed in Patent Document 1, the protrusion (pin) of the drive arm attached to the drive shaft of the drive source has a cam hole provided in the shutter sector and a cam hole provided in the aperture sector. By engaging both, it is possible to drive both the shutter sector and the aperture sector as needed with a single drive source.

  Further, in Patent Document 2, a shutter substrate provided with an opening, and two shutter sectors (shutter blades) supported rotatably on the shutter substrate and capable of opening and closing the opening of the shutter substrate. ) And one drive source (stepping motor). In the imaging device described in Patent Document 2, the operating member (operating pin) attached to the drive shaft of the drive source is provided in each of two shutter sectors that can rotate about different fixed shafts. By engaging with the cam hole, two shutter sectors can be driven by one drive source.

  Patent Document 3 discloses a shutter substrate provided with an opening, two shutter blades that are rotatably supported by the shutter substrate, and that can open and close the opening of the shutter substrate, and one shutter blade. An imaging device including a drive source (electromagnetic actuator) is disclosed. In the imaging device described in Patent Document 3, the operating pin of the operating member (operating arm) attached to the drive shaft of the drive source is provided on each of the two shutter blades that can rotate about different fixed shafts. By engaging with the elongated hole (cam hole), two shutter blades can be driven by one drive source.

  Further, in Patent Document 4, a shutter substrate provided with an opening, and two shutter sectors (shutter blades) supported rotatably on the shutter substrate and capable of opening and closing the opening of the shutter substrate. ), A single aperture sector (diaphragm blade) having an aperture hole (small hole) that is rotatably supported by the shutter substrate and can reduce the opening area of the shutter substrate, and one drive source ( An image pickup apparatus including a swing motor is disclosed. In the imaging apparatus described in Patent Document 4, the operation members (a plurality of operation levers) attached to the drive shaft of the drive source are engaged with two shutter sectors that can rotate about different fixed shafts. At the same time, two shutters can be driven by one drive source by engaging with one aperture sector that is rotatable about a third fixed axis different from the fixed axes of the two shutter sectors. The driving sector and one aperture sector can be driven.

JP 2006-72161 A JP-A-2005-77760 JP 2004-109933 A Japanese Patent Laid-Open No. 11-125850

  However, in the imaging device described in Patent Document 1, a single drive source (stepping motor) is used to drive a total of two sectors (blades), one shutter sector and one aperture sector. It is necessary to provide a drive mechanism (drive arm and cam hole) for transmitting the drive force of the drive source to the sector. For this reason, there exists a problem that the number of parts of a component increases.

  In the imaging apparatus described in Patent Document 2, two shutter sectors are driven by using one drive source (stepping motor), and driving for transmitting the driving force of the drive source to the shutter sectors is performed. It is necessary to provide a mechanism (operating pin and cam hole). For this reason, there exists a problem that the number of parts of a component increases.

  In the imaging device described in Patent Document 3, a single drive source (electromagnetic actuator) is used to drive a total of two shutter sectors, and the driving force of the drive source is transmitted to the shutter sectors. It is necessary to provide a drive mechanism (actuating arm and cam hole). For this reason, there exists a problem that the number of parts of a component increases.

  In the imaging device described in Patent Document 4, a single drive source (swing motor) is used to drive a total of three sectors (blades) including two shutter sectors and one aperture sector. It is necessary to provide a driving mechanism (a plurality of operating levers) for transmitting the driving force of the driving source to the three sectors. For this reason, there exists a problem that the number of parts of a component increases.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide an imaging apparatus capable of suppressing an increase in the number of parts.

Means for Solving the Problems and Effects of the Invention

  An image pickup apparatus according to a first aspect of the present invention is an image pickup apparatus including a shutter substrate provided with a shutter opening. The image pickup device is rotatably attached to the shutter substrate and can open and close the shutter opening. The apparatus further includes one shutter blade having an aperture hole that reduces the amount of light incident from the shutter opening of the substrate, and one drive source that rotationally drives the one shutter blade, and the drive source drives the drive source. The shaft is directly connected to the center of rotation of the shutter blades, and the drive shaft of the drive source is attached to the shutter substrate so as to be substantially perpendicular to the rotation plane of the shutter blades. The source is a stepping motor whose rotation angle can be controlled by the number of pulses, and the shutter blades are fully opened to open the shutter opening according to the rotation angle of the drive shaft of the drive source. Location, the fully closed position for closing the shutter opening, and is movable shutter openings by placing the hole diaphragm shutter opening in three positions partially open the small aperture position.

  In the imaging apparatus according to the first aspect, as described above, the diaphragm is rotatably attached to the shutter substrate, the shutter opening can be opened and closed, and the amount of light incident from the shutter opening of the shutter substrate is reduced. By configuring so as to include one shutter blade having a hole and one drive source for rotationally driving one shutter blade, the drive source rotates one shutter blade having an aperture hole. At this time, since all shutter operations relating to imaging including a small aperture state for adjusting exposure can be performed, an increase in the number of parts constituting the shutter device can be suppressed. In addition, by configuring the drive shaft of the drive source to be directly connected to the center of rotation of the shutter blade, a gear member and a cam mechanism for transmitting the drive force of the drive source to the shutter blade are newly added. Therefore, the drive mechanism of the shutter device can be simplified and the increase in the number of parts can be further suppressed. Further, the drive source is configured to be attached to the shutter substrate so that the drive shaft of the drive source is substantially perpendicular to the rotation plane of the shutter blade, whereby the drive shaft of the drive source and the shutter blade Therefore, the driving force of the drive source can be easily attached directly to the center of rotation of the shutter blades.

  In the imaging device according to the first aspect, the drive source is configured to be a stepping motor capable of controlling the rotation angle by the number of pulses, so that the drive shaft of the drive source can be easily controlled by controlling the number of pulses. The rotation angle can be controlled. Further, the shutter blades are arranged in the fully open position for opening the shutter opening, the fully closed position for closing the shutter opening, and the aperture opening in the shutter opening according to the rotation angle of the drive shaft of the drive source. By constructing it so that it can be moved to three positions of the small aperture position where the part is partially opened, the shutter opening is fully opened, fully closed, and the small aperture state is imaged by one shutter blade. Since it can be formed in accordance with the process, it is possible to easily image the subject according to the exposure situation.

  An imaging device according to a second aspect of the present invention is provided with a shutter substrate provided with a shutter opening, and is rotatably attached to the shutter substrate, and can open and close the shutter opening, and the shutter opening of the shutter substrate. One shutter blade having an aperture hole that reduces the amount of light incident from the light source, and one drive source that rotationally drives the one shutter blade.

  In the imaging apparatus according to the second aspect, as described above, the diaphragm is rotatably attached to the shutter substrate, and the shutter opening can be opened and closed, and the diaphragm that reduces the amount of light incident from the shutter opening of the shutter substrate. By comprising one shutter blade having a hole and one drive source for rotationally driving one shutter blade, exposure is performed when the drive source rotates one shutter blade. Since all shutter operations related to imaging including a small aperture state for adjusting the shutter can be performed, an increase in the number of parts constituting the shutter device can be suppressed.

  In the imaging apparatus according to the second aspect, preferably, the drive shaft of the drive source is directly connected to the rotation center portion of the shutter blade. With this configuration, there is no need to provide a gear member or a cam mechanism for transmitting the driving force of the driving source to the shutter blades, so that the driving mechanism of the shutter device can be simplified and the number of parts can be reduced. Increase can be suppressed.

  In this case, preferably, the drive source is attached to the shutter substrate so that the drive shaft of the drive source is substantially perpendicular to the rotation plane of the shutter blade. With this configuration, since the drive shaft of the drive source and the rotation axis of the shutter blade are parallel, the drive force of the drive source can be easily attached directly to the rotation center of the shutter blade. it can.

  In the imaging apparatus according to the second aspect, preferably, the drive source is a stepping motor capable of controlling the rotation angle by the number of pulses. If comprised in this way, the rotation angle of the drive shaft of a drive source can be easily controlled by control of the number of pulses.

  In the imaging apparatus according to the second aspect described above, preferably, the shutter blade has a fully open position for opening the shutter opening, a fully closed position for closing the shutter opening, and a shutter according to the rotation angle of the drive shaft of the drive source. The aperture can be moved to three positions, ie, a small aperture position that partially opens the shutter aperture by disposing an aperture hole in the aperture. According to this configuration, the shutter opening can be formed in a fully open state, fully closed state, and a small aperture state in accordance with the imaging process with a single shutter blade, so that the subject can be imaged according to the exposure state. It can be done easily.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a shutter device portion constituting a video camera according to an embodiment of the present invention. FIG. 2 is a perspective view when the shutter device portion constituting the video camera according to the embodiment of the present invention shown in FIG. 1 is viewed from another direction. 3 to 6 are views showing the structure of the video camera according to the embodiment of the present invention shown in FIG. 7 to 12 are diagrams for explaining the configuration and operation of the shutter device unit constituting the video camera according to the embodiment of the present invention shown in FIG. First, with reference to FIGS. 1-12, the structure of the video camera by one Embodiment of this invention is demonstrated. In this embodiment, as an example of the imaging apparatus of the present invention, a case will be described in which the present invention is applied to a video camera capable of recording a video on a magnetic tape and reproducing the recorded video.

  In the video camera 10 according to the embodiment of the present invention, as shown in FIGS. 3 and 4, a lens barrel 13 in which a plurality of optical lenses 12 are housed in a resin casing 11, a strobe 14, Built-in microphone 15, video cassette unit 16 to which video tape 50 (see FIG. 5) is detachably mounted, record / play button 17 used when recording video, and used when recording still images A photo button 18, a finder 19, and a liquid crystal monitor 20 capable of displaying a video during recording are attached.

  Further, as shown in FIGS. 3 and 4, the lens barrel 13 in which the plurality of optical lenses 12 are housed is configured to protrude horizontally from the front side of the housing 11 to the outside. The strobe 14 has a function of emitting light as auxiliary light during photographing. The built-in microphone 15 has a function of collecting sounds around the subject at the time of shooting (recording). The recording / playback button 17 starts an operation of recording an image captured by an imaging unit 21 of the video camera 10 described later on the video tape 50 (see FIG. 5) when pressed by the user during shooting. At the end, it has a function of stopping recording on the video tape 50 (see FIG. 5). Further, the photo button 18 is pressed by the user at the time of shooting, and a memory unit 22d (FIG. 5) provided in the control circuit unit 22 to be described later as a still image of the video imaged by the imaging unit 21 when pressed. (See)). Further, the liquid crystal monitor 20 that can be opened and closed from the viewfinder 19 and the housing 11 allows the user to determine the shooting range while looking at the subject through either the viewfinder 19 or the liquid crystal monitor 20 or both. It is configured.

  In addition, as shown in FIG. 4, in the housing 11, as shown in FIG. 4, an image pickup unit 21 that drives an image pickup device such as a CCD sensor (not shown) for photographing a subject, and a control circuit A section 22, a power supply section 23, and a video tape I / F section 24 capable of transferring photographed video data between the video camera 10 and the video tape 50 (see FIG. 5) are provided.

  Here, in this embodiment, as shown in FIGS. 1 and 2, the shutter device unit 30 is configured to reduce the amount of light incident from the shutter substrate 31 provided with the shutter opening 31a and the shutter opening 31a. A circular aperture hole 32a (for a small aperture) is provided, and one shutter blade 32 having a fan-shaped outer shape that is rotatably attached to the shutter substrate 31 and a rotation based on the number of input pulses. The stepping motor 33 is configured to rotate the shutter blade 32 and control the moving angle. The stepping motor 33 is an example of the “drive source” in the present invention. In addition, as shown in FIG. 2, the stepping motor 33 is configured to rotate the shutter blade 32 from the other side surface 31c side opposite to the one side surface 31b to which the shutter blade 32 of the shutter substrate 31 is attached (shutter substrate). The driving shaft 33a of the stepping motor 33 is attached to the shutter substrate 31 by two screw members 34 in a direction perpendicular to the other side surface 31c of the 31). 6, the drive shaft 33a of the stepping motor 33 penetrates the shutter substrate 31 from the other side surface 31c side of the shutter substrate 31, and the shutter blade 32 on the one side surface 31b of the shutter substrate 31 rotates. It is comprised so that it may attach directly to the rotation center part 32b which does not go via a gear member etc.

  Further, in the present embodiment, as shown in FIGS. 7 and 8, one shutter blade 32 directly attached to the drive shaft 33 a of the stepping motor 33 corresponds to the rotation angle of the stepping motor 33. As shown in FIGS. 9 and 10, the shutter opening 31a is partially opened by overlapping the aperture hole 32a of the shutter blade 32 with the shutter opening 31a. As shown in FIGS. 11 and 12, the small aperture position that is opened and the fully closed position that completely closes the shutter opening 31a can be formed.

  As shown in FIG. 5, the control circuit unit 22 of the video camera 10 includes a shooting signal processing unit 22a, a program storage memory unit 22b, a working memory unit 22c, a memory unit 22d, and a control unit including a CPU. 22e.

  Further, the photographic signal processing unit 22a can convert the video captured by the imaging unit 21 to which a CCD sensor (not shown) is connected into an image signal and record the image after performing image processing such as color correction. Has the function of compressing to the data size. The program storage memory unit 22b is provided to store a control program for controlling the entire operation of the video camera 10. The work memory unit 22c is provided for temporarily storing program data, control parameters, and the like necessary for the video camera 10 to perform various operations. The memory unit 22d is provided for recording a still image taken by the imaging unit 21. The control unit 22e has a function of controlling the entire operation of the video camera 10.

  Next, with reference to FIG. 1, FIG. 4, FIG. 5 and FIG. 7 to FIG. 12, the operation of the shutter device section constituting the video camera according to the embodiment of the present invention will be described.

  First, when the video camera 10 is shooting a subject in the shooting mode (recording standby state), as shown in FIG. 5, the control unit 22e including the CPU passes through the plurality of optical lenses 12 (see FIG. 4). Thus, the intensity of reflected light (exposure) from the subject incident on the imaging unit 21 is detected.

  Here, in the present embodiment, as shown in FIGS. 7 to 10, the control unit 22 e applies the pulse control to the shutter substrate 31 of the shutter device unit 30 according to the intensity of the reflected light detected by the imaging unit 21. By rotating the attached stepping motor 33 by a predetermined angle, the shutter blade 32 fully opens the shutter opening 31a of the shutter substrate 31 (fully opened position), or the aperture hole provided in the shutter blade 32 32a is disposed in the shutter opening 31a, and the shutter blade 32 is rotated to a position where the shutter opening 31a is partially opened (small aperture position).

  Further, in the present embodiment, as shown in FIGS. 7 and 8, when the position where the shutter blade 32 completely opens the shutter opening 31a (fully opened position) is the initial position (reference position) of the shutter blade 32, the shutter When rotating the shutter blade 32 to a position where the blade 32 partially opens the shutter opening 31a (small aperture position), the control unit 22e (see FIG. 5) performs pulse control on the stepping motor 33. The shutter blade 32 is rotated in the direction of arrow A by an angle α (90 degrees). As a result, as shown in FIGS. 9 and 10, the shutter blade 32 is moved to a position (small aperture position) at which the shutter opening 31a is partially opened. Depending on the exposure state, the shutter blade 32 may continue to open the shutter opening 31a completely (full open position). In this case, the rotation operation (see FIG. 5) of the shutter blade 32 (see FIG. 5). The direction of arrow A) is not performed.

  Then, as shown in FIGS. 7 to 10, while the position of the shutter blade 32 corresponding to the intensity of the reflected light (exposure) is maintained, the user records / plays back button 17 (see FIG. 4) of the video camera 10. By pressing, the control unit 22e (see FIG. 5) applies image processing to the video obtained from the imaging unit 21 (see FIG. 5), and at the same time, via the video tape I / F unit 24 (see FIG. 5). Recording on the video tape 50 (see FIG. 5) is started. In addition, when the user presses the record / play button 17 (see FIG. 4) again during recording, the control unit 22e (see FIG. 5) stops recording on the video tape 50 (see FIG. 5) and the recording. Enter standby mode.

  Next, when the video camera 10 is in the shooting mode (recording standby state), as shown in FIG. 4, when the user presses the photo button 18, the control unit 22 e (see FIG. 5) presses the photo button 18. The image of the subject at the timing is processed as a still image and recorded in a memory unit 22d (see FIG. 5) provided in the control circuit unit 22 (see FIG. 5).

  Here, in this embodiment, as shown in FIGS. 11 and 12, the control unit 22e (see FIG. 5) allows the user to move the shutter blade 32 of the shutter device unit 30 from the fully open position (see FIG. 7). By rotating the stepping motor 33 of the shutter device unit 30 in the direction of arrow A by an angle β (45 degrees) in synchronization with the timing of pressing the photo button 18 (see FIG. 4), the shutter blades 32 are moved. The shutter blade 32 is rotated to a position where the shutter opening 31a is completely closed (fully closed position). In this case, as described above, the image of the subject at the time when the shutter blades 32 are cut (fully closed) is used as a still image, and the memory unit 22d (see FIG. 5) of the control circuit unit 22 (see FIG. 5). Will be recorded.

  In this embodiment, as shown in FIGS. 11 and 12, the control unit 22e (see FIG. 5) allows the user to move from the state where the shutter blade 32 of the shutter device unit 30 is in the small aperture position (see FIG. 9). By rotating the stepping motor 33 of the shutter device unit 30 in the direction of arrow B by an angle β (45 degrees) in synchronization with the timing of pressing the photo button 18 (see FIG. 4), the shutter blades 32 are moved. The shutter blade 32 is rotated to a position where the shutter opening 31a is completely closed (fully closed position). In this case as well, as described above, the image of the subject at the time when the shutter blade 32 is cut (fully closed) is taken as a still image, and the memory 22d (see FIG. 5) of the control circuit 22 (see FIG. 5). Will be recorded.

  In this embodiment, as shown in FIG. 11, when the shutter blade 32 is cut and a still image is recorded in the memory unit 22d (see FIG. 5) of the control circuit unit 22 (see FIG. 5), the video camera The 10 control units 22e (see FIG. 5) rotate the stepping motor 33 of the shutter device unit 30 in the arrow B direction by an angle β (45 degrees) by pulse control. As a result, as shown in FIG. 7, the shutter blades 32 are rotated to the initial position (reference position) where the shutter blades 32 completely open the shutter opening 31a (fully opened position), and the video camera 10 is rotated. Continues the shooting mode (recording standby state).

  In the present embodiment, as described above, the aperture hole that is rotatably attached to the shutter substrate 31, can open and close the shutter opening 31 a, and reduces the amount of light incident from the shutter opening 31 a of the shutter substrate 31. The stepping motor 33 rotates one shutter blade 32 by including one shutter blade 32 having 32a and one stepping motor 33 that rotationally drives one shutter blade 32. In this case, since all shutter operations related to imaging including a small aperture state for adjusting exposure can be performed, an increase in the number of parts constituting the shutter device unit 30 can be suppressed.

  In the present embodiment, the driving shaft 33a of the stepping motor 33 is configured to be directly connected to the rotation center portion 32b of the shutter blade 32 without using a gear member or the like, thereby driving the stepping motor 33. Since it is not necessary to newly provide a gear member or a cam mechanism for transmitting the force to the shutter blades 32, the drive mechanism of the shutter device unit 30 can be simplified and the increase in the number of parts can be further suppressed. Can do.

  In the present embodiment, the stepping motor 33 is separated from the shutter substrate 31 by the two screw members 34 so that the drive shaft 33 a of the stepping motor 33 is substantially perpendicular to the rotation plane of the shutter blade 32. By being configured to be attached to the other side surface 31b, the drive shaft 33a of the stepping motor 33 and the rotation shaft of the shutter blade 32 are parallel to each other, so that the driving force of the stepping motor 33 can be easily applied to the rotation of the shutter blade 32. It can be directly attached to the moving center portion 32b.

  In this embodiment, the driving source of the shutter blade 32 is configured to use the stepping motor 33 capable of controlling the rotation angle by the number of pulses, so that the stepping motor 33 can be easily controlled by controlling the number of pulses. The rotation angle of the drive shaft 33a can be controlled.

  Further, in the present embodiment, the shutter blade 32 is set to a fully open position (see FIG. 7) for opening the shutter opening 31a and a fully closed position for closing the shutter opening 31a according to the rotation angle of the drive shaft 33a of the stepping motor 33. (Refer to FIG. 11) and the aperture 32a is arranged in the shutter opening 31a so that the shutter aperture 31a can be moved to three positions (see FIG. 9) that partially open the shutter opening 31a. Thus, using one shutter blade 32, the shutter opening 31a can be formed in three states, fully open, fully closed, and small aperture state, according to the imaging process. Can be easily performed.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, a video camera is shown as an example of a photographing apparatus. However, the present invention is not limited to this, and the present invention can be applied to other photographing apparatuses other than a video camera as long as the photographing apparatus has a shutter substrate. is there.

  In the above-described embodiment, the shutter device unit 30 includes the shutter substrate 31 provided with the shutter opening 31a and the circular aperture hole 32a (for small aperture) for reducing the amount of light incident from the shutter opening 31a. And a shutter blade 32 having a fan-shaped outer shape attached to the shutter substrate 31 so as to be rotatable, and a shutter blade 32 whose rotation angle can be controlled based on the number of input pulses. Although the example comprised from the stepping motor 33 for rotationally driving was shown, this invention is not restricted to this, While being provided with the aperture hole which has shapes other than circular in a shutter apparatus part, it is a sector shape. You may make it provide the shutter blade | wing which has other external shapes other than.

  In the above embodiment, the stepping motor 33 is attached to the other side surface 31c opposite to the one side surface 31b to which the shutter blades 32 of the shutter substrate 31 are attached. However, the present invention is not limited to this. Instead, the stepping motor may be attached to the side surface of the shutter substrate on the side where the shutter blades are attached.

  In the above-described embodiment, an example in which the stepping motor 33 capable of controlling the rotation angle based on the number of input pulses is used as a driving source of the shutter blade 32 provided in the shutter device unit 30. The present invention is not limited to this, and a driving source capable of reciprocating rotation at three positions other than the stepping motor may be used as a driving source for the shutter blades.

It is the perspective view which showed the shutter apparatus part which comprises the video camera by one Embodiment of this invention. It is a perspective view at the time of seeing the shutter apparatus part which comprises the video camera by one Embodiment of this invention shown in FIG. 1 from another direction. It is the perspective view which showed the whole structure of the video camera by one Embodiment of this invention shown in FIG. It is the perspective view which showed the whole structure of the video camera by one Embodiment of this invention shown in FIG. It is a block diagram which shows the circuit structure of the video camera by one Embodiment of this invention shown in FIG. It is a top view of the shutter apparatus part which comprises the video camera by one Embodiment of this invention shown in FIG. It is a figure for demonstrating the structure and operation | movement of the shutter apparatus part which comprise the video camera by one Embodiment of this invention shown in FIG. It is a figure for demonstrating the structure and operation | movement of the shutter apparatus part which comprise the video camera by one Embodiment of this invention shown in FIG. It is a figure for demonstrating the structure and operation | movement of the shutter apparatus part which comprise the video camera by one Embodiment of this invention shown in FIG. It is a figure for demonstrating the structure and operation | movement of the shutter apparatus part which comprise the video camera by one Embodiment of this invention shown in FIG. It is a figure for demonstrating the structure and operation | movement of the shutter apparatus part which comprise the video camera by one Embodiment of this invention shown in FIG. It is a figure for demonstrating the structure and operation | movement of the shutter apparatus part which comprise the video camera by one Embodiment of this invention shown in FIG.

Explanation of symbols

31 Shutter board 31a Shutter opening 32 Shutter blade 32a Aperture hole 32b Center of rotation 33 Stepping motor (drive source)
33a Drive shaft

Claims (6)

In an imaging device comprising a shutter substrate provided with a shutter opening,
A shutter blade that is pivotally attached to the shutter substrate, can open and close the shutter opening, and has an aperture hole that reduces the amount of light incident from the shutter opening of the shutter substrate;
And further comprising a single drive source for rotationally driving the single shutter blade,
The drive source is configured such that the drive shaft of the drive source is directly connected to the rotation center portion of the shutter blade, and the drive shaft of the drive source substantially corresponds to the rotation plane of the shutter blade. Attached to the shutter substrate so as to be perpendicular to
The drive source is a stepping motor capable of controlling the rotation angle by the number of pulses,
The shutter blade is arranged in a fully open position for opening the shutter opening, a fully closed position for closing the shutter opening, and the aperture hole in the shutter opening according to the rotation angle of the drive shaft of the drive source. An image pickup apparatus that is movable to three positions of a small aperture position that partially opens the shutter opening. A shutter substrate provided with a shutter opening;
A shutter blade that is pivotally attached to the shutter substrate, can open and close the shutter opening, and has an aperture hole that reduces the amount of light incident from the shutter opening of the shutter substrate;
An image pickup apparatus comprising: one drive source that rotationally drives the one shutter blade.   The imaging apparatus according to claim 2, wherein a driving shaft of the driving source is directly connected to a rotation center portion of the shutter blade.   The imaging apparatus according to claim 3, wherein the drive source is attached to the shutter substrate such that a drive shaft of the drive source is substantially perpendicular to a rotation plane of the shutter blade.   The imaging device according to any one of claims 2 to 4, wherein the drive source is a stepping motor capable of controlling a rotation angle by the number of pulses.   The shutter blade is arranged in a fully open position for opening the shutter opening, a fully closed position for closing the shutter opening, and the aperture hole in the shutter opening according to the rotation angle of the drive shaft of the drive source. The imaging apparatus according to claim 2, wherein the imaging apparatus is movable to three positions of small aperture positions that partially open the shutter opening.

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