JP5252786B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging apparatus having a lens barrel mechanism.

  Conventionally, regarding an imaging apparatus having this type of panning mechanism, there is the following technique disclosed in Patent Document 1.

A plurality of spherical support portions are formed in the central portion of the lens, and the lens is rotatably supported by a similar spherical receiving portion corresponding thereto, and the rotation around the optical axis is restricted using pins and grooves. . Then, the pan / tilt function is executed by selectively supplying the rotational force of the zoom / focus motor to the pan / tilt mechanism formed in the lens barrel.
JP-A-8-292357

  However, it is inevitable that the photographing lens is exposed during photographing. This is because it is necessary to allow light from the object scene to pass when shooting. When not photographing, it is necessary to prevent the lens from being stained. In addition, it is necessary to prevent adhesion of dust.

An object of the present invention is to provide an imaging device capable of protecting a lens (taking lens group) at the time of non-shooting.

In order to achieve the above object, according to the present invention, a photographing light beam from an object scene passing through a photographing aperture is bent by a reflecting element , and the folded photographing light beam is guided to an image pickup device attached to an imaging surface by a photographing lens group. folded together with an optical system, a motor and a lens barrel unit and an output gear rotated by the motor, and the camera body, is held against the camera body, the whole said barrel unit photographing opening And a support member that is rotatably held integrally therewith, and the motor is housed inside the lens barrel unit, and the output gear partially protrudes from the outer peripheral surface of the lens barrel unit. are arranged to, above the support member internal gear is formed, the gear coupling with said internal gear and said portion projecting from the outer peripheral surface of the lens barrel unit of the output gear The lens barrel unit rotates in the support member as the output gear rotates. When shooting, the lens barrel unit rotates in the support member to perform panning shooting. When the lens barrel unit rotates in the support member, the shooting opening faces the camera body, and the support member When the support member is in the first position where it pops up with respect to the camera body and is slidably held in the direction of the rotation axis of the barrel unit so that it can be popped up and down. Even if the lens barrel unit rotates, the shooting opening does not face the camera body, and the support member pops down with respect to the camera body. If consisted photographable state and the non-photographing state when in the second position, can the photographing opening by the lens barrel unit to rotate without popup is opposed to said camera body It is characterized by being.

According to the present invention , the lens can be protected during non-photographing.

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

  FIG. 1 is a configuration diagram of a reflection optical system in an imaging apparatus of the present invention.

  In FIG. 1, the objective lens 1 is an optical element located on the first optical axis A. The prism 2 is a reflective element that bends the first optical axis A by 90 degrees and guides it to the second optical axis B. A first cemented lens 3 positioned between the objective lens 1 and the prism 2 is bonded and fixed to the incident plane 2a of the prism 1 and a second cemented lens 4 is bonded to the exit plane 2b of the prism. ing. The taking lens group 5 is disposed on the second optical axis B, and an image pickup element 6 is provided on the far side.

  The photographing light transmitted through the objective lens 1 is incident on the prism 2 through the first cemented lens 3, and its optical axis is bent 90 degrees at the reflecting surface 2c of the prism 2 and proceeds downward in the figure. The light reflected by the reflecting surface 2 c of the prism 2 is then transmitted through the second cemented lens 4, further passes through the photographing lens group 5, and then forms an image on the image sensor 6.

  In the reflection optical system as described above, for example, when application to a surveillance camera is considered, so-called tilt shooting is required in which shooting is performed by changing the shooting field up and down.

  FIG. 2 is an explanatory diagram for explaining a change in the photographing optical axis when the prism of FIG. 1 is rotated to perform tilt photographing.

  In FIG. 2, when the reflecting surface 2c of the prism 2 is inclined by θ from the solid line state and is in the state shown by the broken line, the first optical axis A is inclined by 2θ from the parallel direction in the drawing shown by the first solid line state. It becomes a state. For this reason, it is necessary that the objective lens 1 is also tilted 2θ from the original state so that the inclination of the optical axis of the objective lens coincides with the inclination of the optical axis of incidence from the subject.

  That is, in such a reflective optical system, it is always necessary to rotate the objective lens 1 by 2θ when the prism 2 is rotated by θ.

  The tilt drive of the reflective optical system in the present invention will be described below.

  First, the prism 2 and the objective lens 1 rotate together. The center of rotation at this time is located on the second optical axis B in FIG. 1 and swings by θ with the point B4R being the R center of the R surface 4a of the second cemented lens 4 as a fulcrum.

  At this time, the objectives 1 are integrated with the prism 2 and rotated by θ. However, since the first optical axis A has an inclination of 2θ as described above, the inclination of the optical axis of the objective lens 1 is matched. For this purpose, it is necessary to further rotate the objective lens 1 by θ.

  For this reason, when the objective lens 1 is integrated with the prism 2 and swings about the B4R as a fulcrum as described above, the objective lens 1 simultaneously swings the prism 2 for optical axis correction. At this time, the center of rotation is located on the first optical axis A, and it swings by θ with respect to the prism 2 with the point A1R being the R center of the R surface 1a of the objective lens 1 as a fulcrum.

  As a result, when the prism 2 is rotated by θ, the objective lens 1 is rotated by θ around the B4R as the rotation center integrally with the prism 2 as described above, and at the same time, further rotated by θ around the A1R as the rotation center with respect to the prism 2. Then, a total of 2θ is rotated. Thus, the inclination of the optical axis of the objective lens 1 can be matched with the inclination 2θ generated on the first optical axis A.

  As described above, the tilting operation when the incident optical axis is tilted by 2θ is performed by the swinging operation of the prism 2 and the objective lens 1.

  FIG. 3 is an exploded perspective view showing a tilt drive mechanism in the imaging apparatus of the present invention.

  In FIG. 3, the objective lens 1 is incorporated and held in an objective lens holder 7. As described above, the first cemented lens 3 and the second cemented lens 4 are bonded and fixed to the prism 2. The prism 2 is incorporated and held in the prism holder 8. The photographing lens group 5 is incorporated and held in a photographing lens holder 9.

  The tilt base plate 10 is fixed to four screw holes 9a (one is not shown) of the photographing lens holder 9 via four holes 10c (two are not shown). It is attached to the photographing lens holder 9. In this state, the objective lens holder 7 holding the objective lens 1 and the prism holder 8 holding the prism 2 are slidably supported.

  The tilt drive lever 11 is provided with two holes 11a at the center of rotation. The tilt drive lever support pin (one not shown) 12 is incorporated so as to be relatively rotatable with respect to the hole 11a of the tilt drive lever 11 when assembled, and in the two holes 10a of the tilt base plate 10. Press fit. Thus, the tilt drive lever 11 can be rotatably supported on the tilt base plate 10.

  A known stepping motor 14 is fixed to the tilt gear base plate 13 with a screw (not shown). The pinion gear 15 is press-fitted into the rotating shaft 14a of the stepping motor. The first reduction gear 16 and the second reduction gear 17 are rotatably supported on the support shafts 13a and 13b of the tilt gear base plate 13, respectively.

  The rotation of the stepping motor 14 is transmitted to the first reduction gear 16 and the second reduction gear 17 via the pinion gear 15. Further, the second reduction gear 17 has an engagement projection 17a for transmitting the rotation to the engaged groove 11b of the tilt drive lever 11 and driving the tilt drive lever 11 about the fulcrum 11a. It is integrally formed.

  The tilt gear presser 18 is fixed to the tilt gear base plate 13 by screws (not shown), and supports the pinion gear 15, the first reduction gear 16, and the second reduction gear 17 so as to be rotatable between the tilt gear base plate 13.

  In the reduction gear unit assembled as described above, a screw (not shown) is screwed into the two screw holes 13c of the tilt gear base plate 13 through the two hole portions 10b of the tilt base plate 10 so that the tilt base plate 10 Is fixedly held. The reduction gear unit includes a tilt gear base plate 13, a stepping motor 14, a pinion gear 15, a first reduction gear 16, a second reduction gear 17, and a tilt gear presser 18.

  Next, the tilt drive mechanism of the objective lens holder 7 and the prism holder 8 in the above configuration will be described.

  The cam pins 19 are press-fitted into four engagement holes 7a (one is not shown) formed in the objective lens holder 7, and are slid into two cam grooves 8a formed in the prism holder 8 during assembly. It is supported movably. The cam groove 8a is set to a trajectory that allows the objective lens holder 7, that is, the objective lens 1 to rotate about the rotation center A1R on the first optical axis A as described in FIG. .

  The objective lens holder driving pin 20 (one is not shown) is press-fitted into the two engagement holes 7 b of the objective lens holder 7. The objective lens holder driving pin 20 is also located in the two cam groove 8a portions formed in the prism holder 8 during assembly, like the cam pin 19.

  The driven shaft portion 20a of the objective lens holder driving pin 20 is set to have a smaller diameter than the cam pin 19 so as not to interfere with the cam groove 8a. Further, the driven shaft portion 20a is slidably engaged with the objective lens holder drive cam groove 11c of the tilt drive lever 11 during assembly, as will be described later.

  FIG. 4 is a perspective view of a principal part showing a state of the prism unit that has been assembled in the tilt drive mechanism of FIG.

  With the above configuration, the objective lens 1 can be rotated with respect to the prism 2 using the rotation center A1R (see FIG. 1) located on the first optical axis A as a fulcrum. I understand.

  Next, in FIG. 3, cam pins 21 (one not shown) are press-fitted into two fitting holes 8b formed in the prism holder 8, and at the two positions formed on the tilt base plate 10 during assembly. The cam groove 10d is slidably supported.

  The cam pins 22 (one of which is not shown) are press-fitted into two fitting holes 8 c formed in the prism holder 8, and two cam grooves 10 d and engaging portions 22 a formed in the tilt base plate 10. It is slidably supported. The cam pin 22 is formed with a driven portion 22b having a smaller diameter than the engaging portion 22a, and is slidably engaged with the prism unit drive cam groove 11d of the tilt drive lever 11 during assembly as will be described later. Become.

  The cam groove 10d is formed by integrating the objective lens holder 7 that holds the objective lens 1 and the prism holder 8 that holds the prism 2, and uses the rotation center B4R on the second optical axis B as a fulcrum as described in FIG. It is set to a trajectory that can be rotated.

  FIG. 5 is a perspective view showing a state in which the photographing lens holder is attached to the prism unit of FIG.

The objective lens 1 and the objective lens holder 7 can rotate with respect to the prism 2 using the rotation center A1R on the first optical axis A as a fulcrum. Further, the objective lens holder 7 holding the objective lens 1 and the prism holder 8 holding the prism 2 can be integrally rotated with the rotation center B4R on the second optical axis B as a fulcrum.

  FIG. 6 is a perspective view showing a final assembled state of the tilt drive mechanism of FIG.

  In the assembled state of FIG. 5, the tilt drive lever 11 is further rotatably fixed to the tilt base plate 10 by the tilt lever support pin 12, and the reduction gear unit is attached to the tilt base plate 10. (Tilt gear presser 18 is not shown).

  As described above, the objective lens holder driving cam groove 11c is slidably engaged with the driven shaft portion 20a of the objective lens holder driving pin 20, and the prism unit driving cam groove 11d is connected to the driven portion 22b of the cam pin 22. It is slidably engaged.

  Further, the engagement protrusion 17a of the second reduction gear 17 is slidably engaged with the engaged groove 11b of the tilt drive lever 11. The rotation of the stepping motor 14 is transmitted to the second reduction gear 17 via the pinion gear 15 and the first reduction gear 16. When the second reduction gear 17 rotates, the engagement protrusion 17a drives the engagement groove 11b in the vertical direction. As a result, the tilt drive lever 11 rotates with the tilt lever support pin 12 as a fulcrum.

  At this time, the objective lens holder driving cam groove 11c and the prism unit driving cam groove 11d operate as follows.

That is, the objective lens holder 7 holding the objective lens 1 and the prism holder 8 holding the prism 2 are integrally rotated by θ around the rotation center B4R (see FIG. 1) on the second optical axis B as a fulcrum. At the same time, the objective lens 1 and the objective lens holder 7 are further rotated by θ with respect to the prism 2 with the rotation center A1R (see FIG. 1) on the first optical axis A as a fulcrum.

As a result, when the prism 2 is rotated by θ, the objective lens 1 is rotated by θ around the B4R as the rotation center integrally with the prism 2 as described above, and at the same time further rotated by θ around the A1R as the rotation center. Thus, a total of 2θ is rotated. As a result, the inclination of the optical axis of the objective lens 1 can be matched with the inclination 2θ generated on the first optical axis A.

  FIG. 7 is a perspective view showing a state of a tilt operation realized by the tilt drive mechanism of FIG.

  When the stepping motor 14 starts to rotate clockwise in the drawing from the initial state shown in FIG. 6, the pinion gear 15 also starts to rotate clockwise, and the rotation is transmitted to the first reduction gear 16. It rotates counterclockwise in the figure. Further, this rotation is transmitted to the second reduction gear 17 so that the second reduction gear 17 starts to rotate in the clockwise direction.

  By this rotation, a pressing force is applied to the engaged groove portion 11b of the tilt driving lever 11 in the downward direction in the figure by the action of the engaging protrusion 17a of the second reduction gear 17. As a result, the tilt drive lever 11 starts to rotate in the clockwise direction in the drawing with the tilt lever support pin 12 as a fulcrum.

As described above, the objective lens holder 7 that holds the objective lens 1 and the prism holder 8 that holds the prism 2 are integrated with the rotation center B4R on the second optical axis B by the rotation of the tilt drive lever 11 (see FIG. 1). Rotate by θ using as a fulcrum. At the same time, the objective lens 1 and the objective lens holder 7 are further rotated by θ with respect to the prism 2 with the rotation center A1R (see FIG. 1) on the first optical axis A as a fulcrum.

  When the prism 2 is rotated by θ, the objective lens 1 is rotated by θ around the B4R as the rotation center integrally with the prism as described above, and at the same time, further rotated by θ around the A1R as the rotation center with respect to the prism 2 in total 2θ. Rotate. As a result, the tilt operation is performed to the state shown in FIG. 7 while maintaining the relationship in which the inclination of the optical axis of the objective lens 1 coincides with the inclination 2θ generated on the first optical axis A. .

  The tilt operation described above has been described as follows. That is, when the stepping motor 14 rotates in the clockwise direction in FIG. 6, as a result, the objective lens holder 7 holding the objective lens 1 rotates in the clockwise direction in FIG.

  Conversely, when the stepping motor 14 rotates counterclockwise in FIG. 6, the movements of the above-described parts are reversed, and as a result, the objective lens holder 7 holding the objective lens 1 rotates counterclockwise in FIG. The detailed description will be omitted.

  FIG. 8 is a perspective view of a main part of a lens barrel unit on which the tilt mechanism of FIG. 6 is mounted and which includes a driving mechanism for panning driving.

  In FIG. 8, a CCD holder 23 constitutes a part of a lens frame, a CCD 24 as an image pickup device is attached to the imaging surface of the reflection optical system in FIG. 1, and a lens barrel component described later is disposed therein. Has been. On the opposite side of the CCD holder 23 from the CCD mounting portion, the tilt drive mechanism described above is fixed to the flange portion 23a of the CCD holder 23 with screws or the like not shown.

  The second group holder 25 contains a second group lens that forms part of the photographic lens group 5. The second group holder 25 is slidably supported by a guide bar 26 fixed to the CCD holder 23 along the optical axis, and rotation around the guide bar 26 is restricted by another guide bar 27.

  A known rack 28 is attached to the second group holder 25. The stepping motor 29 is for driving the second group holder 25 along the optical axis. A known lead screw 30 is coaxially fixed to the output shaft, and the second group holder 25 is moved back and forth along the optical axis as the lead screw 30 rotates by meshing the screws of the rack 28 and the lead screw 30. It becomes. The second group lens is a so-called variator lens having a zooming function of the photographing optical system.

  The fourth group holder 31 includes a fourth group lens that forms part of the photographic lens group 5. The fourth group holder 31 is also supported by the two guide bars 26 and 27 so as to be slidable in the optical axis direction, and a rack (not shown) is attached.

  As in the case of the second group holder 25, the output of the stepping motor 32 is transmitted to the lead screw 30, and the rack 28 is driven, so that the fourth group holder 31 is advanced and retracted along the optical axis direction. The fourth group lens is a so-called compensator lens having a correction function of the photographing optical system.

  The iris unit 33 appropriately regulates the transmission amount of photographing light. A panning drive mechanism is attached to the iris unit 33, and it is possible to perform panning photographing by rotating the entire lens barrel around the optical axis by the drive mechanism.

  FIG. 9 is a perspective view showing a panning drive mechanism constituting a part of the iris unit in FIG.

  In FIG. 9, the iris base plate 34 is configured such that the iris blades not shown in the figure appropriately shield the optical axis opening 34 a to control the amount of photographing light and obtain appropriate exposure. In addition, a third group lens constituting a part of the photographing lens group 5 is fixed to the lens receiving portion 34c located in the back of the optical axis opening 34a.

  The stepping motor 35 is fixed to the iris base plate 34 with screws not shown. The pinion gear 36 is press-fitted into the output shaft 35 a of the stepping motor 35. The first reduction gear 37 is rotatably supported on the shaft 34 b of the iris base plate 34, and the large gear portion 37 a is gear-coupled with the pinion gear 36.

  The intermediate base plate 38 is fixed to the iris base plate 34 with a screw (not shown) after the first reduction gear 37 is incorporated into the iris base plate 34 in the above assembly. The second reduction gear 39 is rotatably supported on the support shaft 38a of the intermediate base plate 38, and the large gear portion 39a is gear-coupled with the small gear portion 37b of the first reduction gear.

  The third reduction gear 40 is rotatably supported on the support shaft 38b of the intermediate base plate 38, and the large gear portion 40a is gear-coupled with the small gear portion 39b of the second reduction gear. The output gear 41 is rotatably supported on the support shaft 38c of the intermediate base plate 38, and the gear portion 41a is gear-coupled to the small gear portion 40b of the third reduction gear.

  The gear retainer 42 is fixed to the iris base plate 34 with a screw (not shown) after the above-described gears are incorporated, so that the gears 42 are rotatably held to constitute a reduction gear unit.

  With the above configuration, the rotation of the stepping motor 35 is transmitted to each of the reduction gears, and finally the rotational force is transmitted to the output gear 41 in an enlarged manner. The output gear 41 is arranged so that a part thereof protrudes from the outer peripheral surface of the CCD holder 23 as will be described later.

  FIG. 10 is a perspective view of a principal part showing an assembled state of a panning drive mechanism that constitutes a part of the iris unit in FIG.

  In FIG. 10, the actuator 47 is for driving the iris. The iris blades 43 and 44 are rotatably supported on the support shaft 34b of the iris base plate 34, respectively, and the drive shaft 47a of the actuator 47 is slidably engaged with the engaged holes. Then, in response to the rotation of the actuator 47, the opening amount of the optical axis opening 34a of the iris base plate 34 is appropriately controlled to obtain proper exposure.

  At this time, the ND filter 45 made of a semi-transmissive film that restricts the amount of light transmitted is rotatably supported on the support shaft 34 d of the iris base plate 34, and the engaged hole 45 a drives the actuator 47. The shaft 47a is slidably engaged. As the actuator 47 is driven, the ND filter 45 advances and retreats to the opening formed by the iris blades 43 and 44 and controls the amount of transmitted light.

  FIG. 11 is a perspective view showing components incorporated in the CCD holder in FIG.

  In FIG. 11, the iris unit 33 is fixed to the CCD holder 23 by screws not shown, and the second group holder 25 and the fourth group holder 31 are supported by two guide bars 26 and 27 so as to be slidable in the optical axis direction. ing.

  When the stepping motor 35 rotates to pan the entire lens barrel, the driving force is transmitted to the reduction gears as described above, and is transmitted to the output gear 41. As described above, the output gear 41 is disposed so that a part thereof protrudes from the outer peripheral surface of the CCD holder 23.

  With such a configuration, the panning drive mechanism can be accommodated in the CCD holder 23 without affecting the operation of the second group holder 25 or the fourth group holder 31, and a small panning mechanism can be realized. .

  FIG. 12 is a perspective view showing a state in which the lens barrel unit of FIG. 8 is incorporated in the first support member.

  An internal gear 60 a is formed on the first support member 60 so as to be gear-coupled with the output gear 41, and the entire barrel unit rotates around the optical axis as the output gear 41 rotates. As a result, it is possible to perform panning photographing so as to achieve a composition intended by the photographer.

  FIG. 13 is an exploded perspective view of the lens barrel unit, the first support member, and the second support member of FIG.

  In FIG. 13, as with the first support member 60, an internal gear 48 a is formed on the second support member 48 so that it can be gear-coupled with the output gear 41. When the first support member 60 and the second support member 48 are assembled with a known screw or the like, the lens barrel unit is rotatably held in the first support member 60 and the second support member 48.

Further, as the output gear 41 rotates, the entire lens barrel unit can be rotated 360 degrees around the optical axis. Tilt head cover 49 is attached, et al is the tilt mechanism portion of the lens barrel unit, configured as appearance parts.

Two hooks 60b having an L-shaped cross section are formed on the first support member 60, and a spherical protrusion 60c is integrally formed on the hook portion 60b. The second support member 48 in a similar hook portion 48 c and the spherical projection 48b (see FIG. 14) is formed.

  FIG. 14 is a perspective view of the entire barrel unit in the imaging apparatus of the present invention.

In FIG. 14, like the first support member 60, a state in which a spherical protrusion 48 b is formed on the hook portion 48 c of the second support member 48 is shown.

Barrel guide member 50, groove corresponding to the hook portion 60 b of the first support member 60 and the second support members 48 each hook portion 60b, 48 c are two points of the guide groove 50a (first support member 60 is not (Shown) is held slidably relative to each other. With this configuration, the entire lens barrel unit 53 can be moved in the vertical direction in the drawing, and can perform pop-up and pop-down operations.

  FIG. 15 is a perspective view showing a state in which a leaf spring is further fixed to the whole lens barrel unit of FIG.

  In FIG. 15, two spherical protrusions 51 a and 51 b are formed on the leaf spring 51, and the back side of the sheet surface of the spherical protrusions 51 a and 51 b is a recess. The state shown in FIG. 15 is a position where the entire lens barrel unit 53 is popped down.

  The upper spherical protrusion 48b (see FIG. 14) of the second support member 48 is engaged with the back-side recess of the spherical protrusion 51a formed on the leaf spring 51, and the lens barrel unit 53 is clicked to the pop-down position. Hold it.

  Further, when the entire lens barrel unit 53 pops up, the lower spherical protrusion 48b (see FIG. 14) of the second support member 48 and the back-side recess of the spherical protrusion 51b formed on the leaf spring 51 are engaged. Then, the entire lens barrel unit 53 is held at the pop-up position with a click force.

  Further, another leaf spring (not shown) having a mirror surface target shape is fixed to the rear surface of the lens barrel guide member 50 on the paper surface, and a spherical protrusion 60c (formed on the first support member 60). 13) and the recess on the back side of the spherical protrusion formed on the leaf spring (not shown) are appropriately engaged. Then, holding by the click force at the pop-up and pop-down positions of the entire lens barrel unit 53 is performed.

  FIG. 16 is a perspective view when the entire lens barrel unit is in the pop-up state in the imaging apparatus according to the embodiment of the present invention.

  In FIG. 16, a lens barrel guide member 50 is enclosed in a camera body 52, and a known video recording medium, electrical components, a liquid crystal display device, and the like are attached to the camera body 52. In FIG. 16, the entire lens barrel unit 53 is in a pop-up state, and the object scene can be selectively photographed by a panning and tilting drive mechanism.

  At this time, the opening 49a formed on the tilt head cover 49 for taking in the photographing light can perform photographing in all directions without being blocked by the camera body 52 in panning photographing. This is because it protrudes above the upper surface 52a of the camera body 52.

  At this time, the photographer can take a picture of the camera main body 52 by hand, and can appropriately perform pan-tilt photography with the camera body 52 placed on a desk or a charging cradle.

  In addition, by performing automatic tracking shooting that automatically discriminates the movement of the subject and automatically tracks it, it is possible to automatically capture the scenery of the family group in which the entire family is reflected. Furthermore, by confirming the imaging information from the camera via the Internet, it can be applied to a surveillance camera at a home away from home.

  FIG. 17 is a perspective view when the entire lens barrel unit is in a pop-down state in the imaging apparatus according to the embodiment of the present invention.

  In FIG. 17, the photographer can perform normal hand-held video shooting without pan-tilt. In addition, at this time, the camera body 52 performs hand-held panning shooting within a range where the object field is not obstructed, and also uses the tilt shooting and further the above-described pan / tilt shooting function to suppress camera shake. It is also possible to realize an anti-vibration camera.

  FIG. 18 is a perspective view showing a state in which the opening of the tilt head cover is rotated by approximately 90 degrees toward the camera body from the state of FIG. 17 and stopped.

Although FIG. 17 shows a state capable photographing, from that state, when the photographer off an unillustrated main switch, the operation of the panning drive mechanism and barrel Yu Knitting that contains the tilt head cover 49 Start rotating.

  Then, in FIG. 17, the opening 49 a that has been directed to the object scene side rotates approximately 90 degrees toward the camera body 52 and stops as shown in FIG. 18. In this non-photographing state, the opening 49a is in a position facing the camera body 52, so that the photographing optical system cannot be touched from the outside, and the photographing optical system can be protected from external dust or foreign matter. Become.

  Therefore, it is possible to protect the photographing lens without adding a new barrier mechanism, and it is possible to realize a camera that is inexpensive, small in size, and excellent in functionality.

  Although the embodiment has been described in the imaging device having the pop-up function, the technical idea proposed this time can be applied even when the pop-up function is not provided.

  The embodiment of the pan / tilt camera having the panning drive mechanism and the tilt drive mechanism to which the present invention is applied has been described above. However, it goes without saying that the present invention is not limited to the contents of the above-described embodiment, and may take any form without departing from the contents described in the claims.

It is a block diagram of the reflective optical system in the imaging device of this invention. It is explanatory drawing explaining the change of the imaging | photography optical axis at the time of rotating the prism of FIG. 1 in order to perform tilt imaging | photography. It is a disassembled perspective view which shows the tilt drive mechanism in the imaging device of this invention. FIG. 4 is a perspective view of a principal part showing a state of a prism unit that has been assembled in the tilt drive mechanism of FIG. 3. It is a perspective view which shows the state which attached the photographic lens holder to the prism unit of FIG. FIG. 4 is a perspective view showing a final assembled state of the tilt drive mechanism of FIG. 3. It is a perspective view which shows the mode of the tilt operation implement | achieved by the tilt drive mechanism of FIG. FIG. 7 is a perspective view of a main part of a lens barrel unit on which the tilt mechanism of FIG. 6 is mounted and which includes a drive mechanism for panning drive. It is a perspective view which shows the panning drive mechanism which comprises a part of iris unit in FIG. It is a principal part perspective view which shows the assembly state of the panning drive mechanism which comprises some iris units in FIG. It is a perspective view which shows the component assembled in the CCD holder in FIG. It is a perspective view which shows a mode that the lens-barrel unit of FIG. 8 was integrated in the 1st support member. It is a disassembled perspective view of the lens-barrel unit of FIG. 8, a 1st support member, and a 2nd support member. It is a perspective view of the whole lens-barrel unit in the imaging device of the present invention. FIG. 15 is a perspective view showing a state in which a leaf spring is further fixed to the whole lens barrel unit of FIG. 14. In the imaging device which concerns on embodiment of this invention, it is a perspective view when the whole lens-barrel unit is a pop-up state. In the imaging device concerning an embodiment of the invention, it is a perspective view when the whole lens barrel unit is in a pop-down state. FIG. 18 is a perspective view showing a state in which the opening of the tilt head cover is rotated by approximately 90 degrees toward the camera body from the state of FIG. 17 and stopped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Objective lens 2 Prism 3 1st junction lens 4 2nd junction lens 5 Shooting lens group 6 Imaging element 7 Objective lens holder 8 Prism holder 9 Shooting lens holder 10 Tilt ground plane 11 Tilt drive lever 12 Tilt drive lever support pin 13 Tilt gear Base plate 14 Stepping motor 15 Pinion gear 16 First reduction gear 17 Second reduction gear 18 Tilt gear holder 19 Cam pin 20 Objective lens holder drive pins 21 and 22 Cam pin 23 CCD holder 24 CCD
25 Group 2 holders 26 and 27 Guide bar 28 Rack 29 Stepping motor 30 Lead screw 31 Group 4 holder 32 Stepping motor 33 Iris unit 34 Iris base plate 35 Stepping motor 36 Pinion gear 37 First reduction gear 38 Intermediate base plate 39 Second reduction gear 40 Third reduction gear 41 Output gear 42 Gear presser 43, 44 Iris blade 45 ND filter 46 CCD cover 47 Actuator 48 Second support member 49 Tilt head cover 50 Lens barrel guide member 51 Leaf spring 52 Camera body 53 Whole lens barrel unit 60 First Support member

Claims (4)

A bending optical system that folds a photographic light beam from an object field passing through the photographic aperture by a reflecting element and guides the folded photographic light beam to an image sensor attached to an imaging surface by a photographic lens group ; and a motor; A lens barrel unit having an output gear rotated by a motor;
The camera body,
A holding member that is held with respect to the camera body and holds the entire barrel unit so as to be rotatable integrally with the photographing opening;
The motor is housed inside the lens barrel unit, and the output gear is arranged so that a part projects from the outer peripheral surface of the lens barrel unit,
An internal gear is formed on the support member, and the mirror is coupled with the rotation of the output gear by the gear coupling between the part of the output gear protruding from the outer peripheral surface of the barrel unit and the internal gear. The cylinder unit is configured to rotate in the support member,
When taking a picture, the lens barrel unit rotates in the support member to enable panning photography, and when in a non-photographing state, the lens barrel unit rotates in the support member. The shooting opening is opposed to the camera body;
The support member is slidably held in the direction of the axis of rotation of the barrel unit so that the camera body can be popped up and down, and the support member pops up with respect to the camera body. When the lens barrel unit is rotated, the photographing opening does not face the camera body, and the support member pops down with respect to the camera body. When the photographing state is changed to the non-photographing state at the second position, the lens barrel unit rotates without popping up so that the photographing opening can face the camera body. An imaging device characterized by being:   The imaging apparatus according to claim 1, wherein the lens barrel unit is rotatable 360 degrees in the support member.   The imaging apparatus according to claim 1, wherein when the support member is in the second position, a bottom surface of the barrel unit is flush with a bottom surface of the camera body. The lens barrel unit further includes a light amount adjustment unit for adjusting a light amount of the photographing light beam, and the motor is fixed to the light amount adjustment unit. The imaging apparatus according to item 1.

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