JP5300465B2 - Imaging device and lens device - Google Patents

Description

  The present invention relates to an imaging apparatus and a lens apparatus that include a lens barrier that protects an imaging lens.

  In recent years, the miniaturization of video cameras has progressed remarkably, and the size of the video camera body (projected area of each surface) tends to decrease.

  On the other hand, video cameras need to be equipped with various functional parts as the functions and functions of video cameras have increased. For example, a strobe unit for taking a still image, a video light that illuminates a subject in a dark place, a microphone for recording sound, a sensor unit for autofocus, and the like. These units need to be arranged in front of the video camera and in the vicinity of the imaging lens in terms of performance.

  A video camera is also known in which an openable / closable lens barrier is provided on the front surface of the imaging lens to protect the imaging lens when not in use, such as when carried. Here, as an example of a conventional video camera, a video camera having a lens barrier in an imaging lens will be described.

  FIG. 10 is a front view showing an appearance of a video camera in a conventional shooting state. In the shooting state, the lens barrier is open. The video camera has an imaging lens 100, a strobe unit 101, a microphone 102, a sensor unit 103, a video light 104, and the like on the front surface thereof.

  The strobe unit 101 is disposed on the right side of the imaging lens 100 when viewed from the front. A microphone 102 for recording sound is disposed below the imaging lens 100. An autofocus sensor unit 103 is disposed above the strobe unit 101. A video light 104 is disposed between the strobe unit 101 and the microphone 102. As described above, since various functional components are arranged around the imaging lens 100, the front of the video camera is very complicated and unsightly.

  FIG. 11 is a cross-sectional view showing the internal configuration of the video camera. The lens barrier 105 is disposed on the front surface of the imaging lens 100 and includes four blades 105a, 105b, 105c, and 105d. Above the front of the video camera, the wing 105a on the imaging lens side and the wing 105b on the subject side are moved to the upper retreat space 106 by a driving device (not shown) so as to overlap each other at the time of shooting. Evacuate from.

  Similarly, below the front of the video camera, the imaging lens-side wing 105c and the subject-side wing 105d are moved to the lower evacuation space 107 by a driving device (not shown) so as to overlap during imaging, and the imaging lens 100 Evacuate from the shooting range.

  Therefore, when the microphone 102 is disposed in the vicinity of the imaging lens 100, it must be disposed at a position sufficiently separated from the retreat space 107 of the lens barrier 105.

In relation to the above imaging device, Patent Literature 1 discloses an imaging device including a lens barrier formed in a dome shape on the front surface of an imaging lens.
JP 2005-84605 A

  However, in the conventional video camera, since functional parts such as a strobe unit and a microphone are arranged around the imaging lens, the appearance of the design is complicated. Furthermore, since the front surface of the video camera has an uneven shape, there is a possibility that the video camera may be caught when being carried.

  Also, when holding a video camera during shooting, the protruding parts were in the way, making it difficult to shoot while holding the video camera firmly.

  Furthermore, when the strobe unit or the microphone is disposed, it must be disposed at a position sufficiently away from the retreat space of the lens barrier, which causes a problem that is contrary to the downsizing of the video camera device.

  In addition, Patent Document 1 does not describe the arrangement of components for configuring the imaging device around the dome-shaped lens barrier.

  Accordingly, the present invention has been made paying attention to the above-mentioned problems, and an object thereof is to provide an imaging device and a lens device that are high in quality in appearance in design, small in size, and easy to operate.

In order to achieve the above object, an imaging apparatus of the present invention includes a lens barrier that is disposed in front of an imaging lens and has a dome shape, and a lens barrel exterior that accommodates the imaging lens and the lens barrier in an optical axis direction. In the imaging device provided, the lens barrier is positioned in the center side of the lens barrier closer to the objective side than the periphery of the lens barrier when the lens barrier is closed. characterized by wherein the provided to the arrangement of the microphones on each side of the lens barrel exterior in the space between the sky between the end portion of the object side of.

The lens device according to the present invention is used in an optical apparatus including a lens barrier having a dome shape and a lens barrel exterior that accommodates the lens and the lens barrier in an optical axis direction. In the lens device, the central portion of the lens barrier is positioned closer to the objective side than the peripheral portion of the lens barrier when the lens barrier is closed, so that the peripheral portion of the lens barrier and the lens barrel exterior characterized in that provided between the sky, it was placed a microphone on both sides of the lens barrel exterior in the space between the end portion of the object side of.

According to the imaging apparatus of the present invention, the microphones are disposed on both sides of the lens barrel exterior in the space between the peripheral portion of the lens barrier and the subject-side end of the lens barrel exterior . As a result, it is possible to provide an image pickup apparatus that is high in quality in terms of design, is small, and has good operability. In addition, it is possible to take a sound with a stereo sense (realism).

  Embodiments of an imaging apparatus and a lens apparatus according to the present invention will be described with reference to the drawings. The imaging device of this embodiment is applied to a video camera provided with a dome-shaped lens barrier.

  FIG. 1 is a perspective view showing an appearance of a video camera viewed from the front in the embodiment. FIG. 1 shows a state in which the lens barrier is opened. FIG. 2 is a perspective view showing the appearance of the video camera viewed from the rear.

  The video camera is disposed on the side of the imaging lens 1, the grip unit 2 that serves as a grip at the time of shooting, and is detachably provided on the back of the video camera body 8. The video camera body 8 is powered on. A battery pack 3 to be supplied is provided. The video camera also has a zoom lever 4, a trigger button 5, and a video display device 6 disposed on the side of the imaging lens 1. The side part 6a of the video display device 6 is rotatably connected to the video camera body 8 by a biaxial hinge mechanism (not shown).

  Further, the video camera is provided with a lens barrel exterior 7 that is concentric with the center of the optical axis of the imaging lens 1 and has a filter screw 10 formed at the tip thereof so as to cover the lens barrel that protects the imaging lens 1. ing. The lens barrel exterior 7 accommodates the imaging lens 1, a lens barrier 15 (see FIG. 3) described later, and the like in the optical axis direction. A cylindrical focus dial 9 is provided obliquely below the lens barrel exterior 7. When the focus dial 9 is rotated in the manual focus mode, the focus position can be arbitrarily set.

  In addition, a pop-up flash unit 11 is accommodated in the upper part of the lens barrel exterior 7 so as to be substantially flush with the lens barrel exterior 7 when accommodated. Further, a microphone (R) 12 and a microphone (L) 13 are arranged in the horizontal direction of the lens barrel exterior 7 so as to be horizontal with the optical axis of the imaging lens 1 and substantially flush with the lens barrel exterior 7. Yes. That is, the microphone (R) 12 and the microphone (L) 13 are stereo microphones so that the right sound is collected by the microphone (R) 12 and the left sound is collected by the microphone (L) 13 when viewed from the front of the video camera. It has a structure. Note that the subscripts (R) and (L) indicate the right side and the left side in the other members.

  In addition, a sensor unit 14 for autofocus is disposed below the lens barrel exterior 7 and in front of the imaging lens 1 and inside the filter screw 10 formed on the lens barrel exterior 7. It is provided so that the shaft is substantially parallel.

  In this way, the necessary pop-up flash unit 11, microphone (R) 12, microphone (L) 13, and sensor unit 14 in constructing the video camera can be designed without protruding from the lens barrel exterior 7. Good looking. Further, since there is no protrusion from the lens barrel exterior 7, there is no possibility of being caught, and these units do not interfere with the operation of the video camera.

  Next, an example of a specific configuration of the lens barrier in the video camera is shown. FIG. 3 is a perspective view showing the configuration of the lens barrier 15 in a closed state as viewed from the left front. FIG. 4 is a perspective view showing the configuration of the lens barrier 15 in a closed state as viewed from the right front. FIG. 5 is a perspective view showing the configuration of the lens barrier 15 in an open state as viewed from the left front. FIG. 6 is a perspective view showing the configuration of the lens barrier 15 in an open state as viewed from the right front.

  The lens barrier 15 is formed in a dome shape including an imaging lens side barrier wing 15a positioned above, a subject side barrier wing 15b, a imaging lens side barrier wing 15c positioned below, and a subject side barrier wing 15d. It consists of four rotatable barrier wings.

  The upper barrier wings 15a and 15b are rotatably connected to a rotary shaft 17a and a rotary shaft 17b, which are provided at the tip portions on both sides thereof and are orthogonal to the optical axis of the imaging lens 1, respectively. Further, a guide hole 15e is formed in the barrier wing 15b on the subject side, and a pin 15f that engages with the guide hole 15e is provided on the barrier wing 15a on the imaging lens side.

  Similarly, the lower barrier wings 15c and 15d are rotatably connected to the rotary shaft 17c and the rotary shaft 17d, respectively, which are provided at the tip portions on both sides thereof and are orthogonal to the optical axis of the imaging lens 1. Yes. Further, a guide hole 15g is formed in the barrier wing 15d on the subject side, and a pin 15h that engages with the guide hole 15g is provided on the barrier wing 15c on the imaging lens side.

  The drive device 16 is provided with a drive pin 16a that engages with a drive hole 15j formed in the barrier wing 15b, and a drive pin 16b that engages with a drive hole 15k formed in the barrier wing 15d.

  When the lens barrier 15 is opened, when the driving pin 16a of the driving device 16 rotates in the direction of arrow A in the drawing with the rotation shaft 17a as the rotation center, the barrier blade 15b is rotated by the engagement between the driving hole 15j and the driving pin 16a. 17a and the rotating shaft 17b are rotated upward about the rotation center.

  At this time, when the barrier wing 15b rotates by a predetermined angle, the pin 15f provided on the barrier wing 15a is engaged with the end of the guide hole 15e formed in the barrier wing 15b, and interlocked with the rotation of the barrier wing 15b. The barrier wing 15a rotates. Accordingly, the barrier feather 15a and the barrier feather 15b are retracted upward from the imaging range of the imaging lens 1 so as to overlap.

  The same applies to the lower barrier wings 15c and 15d. That is, when the drive pin 16b of the drive device 16 rotates in the direction of arrow B in the figure with the rotation shaft 17c as the rotation center, the barrier blade 15d is engaged with the rotation shaft 17c and the rotation shaft 17d by the engagement of the drive hole 15k and the drive pin 16b. Rotate downward about the center of rotation.

  At this time, when the barrier wing 15d rotates by a predetermined angle, the pin 15h provided on the barrier wing 15c engages with the end of the guide hole 15g formed in the barrier wing 15d, and interlocks with the rotation of the barrier wing 15d. The barrier wing 15c rotates. As a result, the barrier wing 15c and the barrier wing 15d retreat downward from the imaging range of the imaging lens 1 so that they overlap.

  At this time, as shown in FIGS. 7 and 8 to be described later, the lens barrel 21 has a barrier wing 15a and a receiving portion 21a in which the barrier wing 15b at the center of the barrier lens 15 is stored. It is formed at the peripheral edge. The receiving portion 21a has a shape that is offset from the rear surface of the barrier 15a by a slight gap necessary for driving. Similarly, the lens barrel 21 is formed with a barrier wing 15 c and a receiving portion 21 b in which the barrier wing 15 d at the center of the barrier lens 15 is stored at the peripheral portion of the barrier lens 15. The receiving portion 21b has a shape that is offset from the rear surface of the barrier 15c by a slight gap necessary for driving. The receiving portions 21a and 21b can receive a static pressure load applied to the lens barrier in the barrier closed state.

  Next, an example of a specific configuration inside the video camera will be described. FIG. 7 is a cross-sectional view showing an internal configuration of the lens barrel exterior 7 portion of the video camera body 8 with the lens barrier 15 closed and the pop-up flash unit 11 stored. FIG. 8 is a cross-sectional view showing the internal configuration of the lens barrel exterior 7 of the video camera body 8 with the lens barrier 15 opened and the pop-up strobe unit 11 being used. 7 and 8, a cross section in the vertical direction of the video camera body is shown.

  The pop-up strobe unit 11 disposed on the upper part of the lens barrel exterior 7 is provided with a xenon tube 11a connected to an electric signal processing circuit (not shown) of the video camera body 8 by a wire (not shown). . When a predetermined voltage is applied to the xenon tube 11a from the electric signal processing circuit, a discharge is generated in the tube and the xenon tube 11a emits light.

  A reflector 11b is provided on the rear side of the xenon tube 11a, and a Fresnel lens 11c is provided on the front side. The light from the xenon tube 11a is reflected to the front side by the reflecting plate 11b, and is distributed to a predetermined range by the Fresnel lens 11c.

  In the present embodiment, as shown in FIG. 7, in a state where the lens barrier 15 is closed, the barrier wing 15b and the barrier wing 15d at the center of the barrier lens 15 are placed on the objective side with respect to the receiving portions 21a and 21b. Provided. As a result, the space surrounded by the barriers 15b and 15d, the receiving portions 21a and 21b, and the lens barrel exterior 7 (hereinafter referred to as the space formed by the peripheral portion of the lens barrier 15 and the end of the lens barrel exterior 7 on the subject side). Can be provided). The video camera body 8 as a whole can be reduced in size by effectively using the space. In particular, the space can be made wider because it matches the shape of the imaging lens 1.

  When the pop-up strobe unit 11 is stored, a part of the pop-up strobe unit 11 is housed in the space between the peripheral edge of the dome-shaped lens barrier 15 and the end of the lens barrel exterior 7 on the subject side. At this time, the strobe cover 11 f of the pop-up strobe unit 11 is substantially flush with the lens barrel exterior 7.

  Further, the video camera body 8 is provided with a rotating shaft 11e, and the pop-up strobe unit 11 is rotatably connected to the video camera body 8 around the rotating shaft 11e. When the pop-up strobe unit 11 is used, the pop-up mechanism (not shown) causes the optical axis of the imaging lens 1 until the light distribution angle of the Fresnel lens 11 c becomes a predetermined angle with respect to the optical axis direction of the imaging lens 1. Rotate in a direction perpendicular to the direction.

  In this manner, the pop-up strobe unit 11 can freely rotate between the protruding position (see FIG. 8) and the storage position (see FIG. 7) with respect to the lens barrel exterior 7, and when the pop-up strobe unit 11 is accommodated in the lens barrel exterior 7, The unit cover is formed so as to be substantially flush with the lens barrel exterior 7.

  The sensor unit 14 disposed at the lower part of the lens barrel exterior 7 is provided with a sensor 14a connected to an electric signal processing circuit (not shown) of the video camera body 8 by a flexible cable (not shown). ing.

  A lens 14b and a sensor window 14c are provided in front of the lens 14b on the front side of the sensor 14a. The sensor unit 14 is housed in a space between the periphery of the dome-shaped lens barrier 15 and the subject side end of the lens barrel exterior 7 so that the light receiving direction is substantially parallel to the optical axis of the imaging lens 1. It has been.

  FIG. 9 is a cross-sectional view showing the internal structure of the lens barrel exterior 7 portion of the video camera body 8. FIG. 9 shows a cross section of the video camera body 8 in the horizontal direction. A microphone (R) 12 and a microphone (L) 13 are arranged on both sides of the lens barrel exterior 7. The microphone element (R) 12a and the microphone element (L) 13a for both channels are press-fitted into the microphone rubbers 12c and 13c so that the sound receiving surfaces 12b and 13b are in the outer surface direction. That is, the microphone elements 12a and 13a of both channels are arranged so that the sound receiving surfaces thereof are outward with respect to the side surface of the lens barrel exterior 7 and substantially parallel to the optical axis of the imaging lens 1. . Also, microphone covers 12d and 13d provided with a number of through holes are provided on the front surfaces of the microphone element (R) 12a and the microphone element (L) 13a.

  The microphone (R) 12 and the microphone (L) 13 are housed in a space between the peripheral edge of the dome-shaped lens barrier 15 and the subject-side end of the barrel exterior 7. At this time, the microphone covers 12 d and 13 d provided on the microphone (R) 12 and the microphone (L) 13 are substantially flush with the lens barrel exterior 7.

  With such a configuration, the microphone (R) 12 and the microphone (L) 13 can be sufficiently separated without increasing the size of the video camera body 8. Therefore, it is possible to take a sound with a stereo sense (realism).

  According to the imaging apparatus of the present embodiment, the functional parts of the video camera are arranged in the space between the peripheral edge of the dome-shaped lens barrier 15 and the subject side end of the barrel exterior 7 of the video camera body 8. To do. As functional parts, a pop-up strobe unit 11, a microphone unit including a microphone (R) 12 and a microphone (L) 13, and a sensor unit 14 are arranged. Furthermore, the covers of these functional parts are formed so as to be substantially flush with the lens barrel exterior. As a result, it is possible to provide a video camera that has a high-quality design, is small, and has good operability.

  Further, since the microphone (R) 12 and the microphone (L) 13 are arranged on both sides of the lens barrel exterior 7, when a stereo microphone is used, the microphone elements of both channels can be connected without increasing the size of the video camera body. Can be placed apart. Therefore, both channels are separated, and a sound with a sense of stereo (realism) can be taken.

  In addition, when the lens barrier is closed, the receiving portion in which the plurality of wings are stored is formed at the peripheral portion of the lens barrier, so that the space in front of the receiving portion can be used effectively.

  In addition, the strobe unit can be effectively arranged. Moreover, since the cover of the strobe unit is formed so as to be substantially flush with the lens barrel exterior, the strobe unit does not get in the way and the visual quality and operability are improved.

  In addition, the microphone unit can be effectively arranged. Further, since the cover of the microphone unit is formed so as to be substantially flush with the lens barrel exterior, the strobe unit does not get in the way, and the visual quality and operability are improved. In addition, the sensor unit can be effectively arranged.

  The present invention is not limited to the configuration of the above-described embodiment, and any configuration can be used as long as the functions shown in the claims or the functions of the configuration of the present embodiment can be achieved. Is also applicable.

  For example, in the above embodiment, a strobe unit, a microphone unit, and a sensor unit are given as examples of functional parts. However, the present invention is not limited to these units, and examples thereof include a video light that illuminates a subject in a dark place. May be.

  In the above embodiment, the structure in which the barrier group opens and closes up and down with respect to the normal position of the video camera is shown. However, the present invention is not limited to this. The same applies.

  In the above-described embodiment, a video camera has been described as an example of the imaging device. However, the present invention can also be applied to a film camera, a digital video camera, a digital SLR (single-lens reflex camera), and the like. In addition, the present invention is not limited to the imaging device described above, and can be applied to various optical devices such as a monitoring device, a telescope, and a microscope.

  In the above embodiment, the lens barrel exterior is integrated with the video camera main body as a video camera. However, as a lens device having the lens barrel exterior, the lens barrel exterior can be exchanged with the main body of an optical device such as an imaging device. It may be worn.

It is a perspective view which shows the external appearance of the video camera seen from the front in embodiment. It is a perspective view which shows the external appearance of the video camera seen from back. It is a perspective view which shows the structure of the lens barrier 15 of the closed state seen from the left front. It is a perspective view which shows the structure of the lens barrier 15 of the closed state seen from the right front. It is a perspective view which shows the structure of the lens barrier 15 of the open state seen from the left front. It is a perspective view which shows the structure of the lens barrier 15 of the open state seen from the right front. 2 is a cross-sectional view showing an internal configuration of a lens barrel exterior 7 portion of a video camera body 8 in a state where a lens barrier 15 is closed and a pop-up strobe unit 11 is housed. FIG. 2 is a cross-sectional view showing an internal configuration of a lens barrel exterior 7 portion of the video camera body 8 in a state where the lens barrier 15 is opened and the pop-up flash unit 11 is used. FIG. 3 is a cross-sectional view showing an internal configuration of a lens barrel exterior 7 portion in the video camera body 8. FIG. It is a front view which shows the external appearance of the video camera in the conventional imaging | photography state. It is sectional drawing which shows the internal structure of a video camera.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Imaging lens 7 Lens barrel exterior 8 Video camera body 11 Pop-up strobe unit 12, 13 Microphone 12a, 13a Microphone element 14 Sensor unit 15 Lens barrier

Claims (8)

In an imaging device including a lens barrier disposed in front of the imaging lens and having a dome shape, and a lens barrel exterior that houses the imaging lens and the lens barrier in an optical axis direction,
By positioning the central portion of the lens barrier closer to the objective side than the peripheral portion of the lens barrier in a state where the lens barrier is closed, the peripheral portion of the lens barrier and the end portion on the subject side of the lens barrel exterior imaging device according to claim to provided to the arrangement of the microphones on each side of the lens barrel exterior in the space between the empty between. Cover of the microphone, an imaging apparatus according to claim 1, characterized in that it is formed such that the lens barrel exterior substantially the same plane. The lens barrier has a plurality of rotatable barrier wings,
Imaging apparatus of claim 1, wherein the receiving portion into which the barrier blades are stored when opening the lens barrier is formed on the periphery. In the space, the imaging apparatus according to any one of claims 1 to 3, characterized in that the flash unit is provided. The strobe unit can be rotated to a protruding position or a storage position with respect to the lens barrel exterior so that the cover of the strobe unit is substantially flush with the lens barrel exterior when accommodated in the lens barrel exterior. imaging device according to claim 4, characterized in that it is formed. Microphone disposed on both sides of the barrel exterior, each have a microphone elements constituting the channel of a stereo microphone, the microphone elements of both channels, the receiving surface of each other with respect to the side surface of the lens barrel exterior The imaging apparatus according to any one of claims 1 to 5, wherein the imaging apparatus is disposed so as to face outward and substantially parallel to an optical axis of the imaging lens. In the space, Ri Contact with the sensor unit for autofocus are provided, as the light receiving direction of the sensor unit is substantially parallel to the optical axis of the imaging lens, claims, characterized in that it is arranged The imaging device according to any one of 1 to 6 . A lens device used in an optical apparatus, comprising a lens barrier disposed in front of a lens and having a dome shape, and a lens barrel exterior housing the lens and the lens barrier in an optical axis direction,
By positioning the central portion of the lens barrier closer to the objective side than the peripheral portion of the lens barrier in a state where the lens barrier is closed, the peripheral portion of the lens barrier and the end portion on the subject side of the lens barrel exterior lens apparatus characterized by a provided to the arrangement of the microphones on each side of the lens barrel exterior in the space between the empty between.

Images