WO2015029802A1 - 撮像装置 - Google Patents
撮像装置 Download PDFInfo
- Publication number
- WO2015029802A1 WO2015029802A1 PCT/JP2014/071468 JP2014071468W WO2015029802A1 WO 2015029802 A1 WO2015029802 A1 WO 2015029802A1 JP 2014071468 W JP2014071468 W JP 2014071468W WO 2015029802 A1 WO2015029802 A1 WO 2015029802A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rotating sphere
- spring
- protrusion
- imaging
- rotating
- Prior art date
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19617—Surveillance camera constructional details
- G08B13/19632—Camera support structures, e.g. attachment means, poles
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
- G03B37/02—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with scanning movement of lens or cameras
Definitions
- This technology relates to an imaging device. More specifically, the present invention relates to a mechanism for improving the reliability of an imaging apparatus capable of rotating an optical block and a lens barrel that houses the imaging block.
- a lens barrel rotation type imaging device in which a lens barrel rotates
- a surveillance dome type camera installed on the ceiling or wall of a building.
- This dome-type camera is installed for the purpose of ensuring safety and improving serviceability in hospitals, hotels, department stores, and the like, and performs monitoring by taking images. That is, an optical block constituted by a lens and an imaging block constituted by an imaging element are accommodated in a lens barrel, and the lens barrel is horizontally (hereinafter referred to as “pan direction”) and vertical direction (hereinafter referred to as “ It is attached so that it can rotate in the “tilt direction”), and the outer periphery of the movable region of the lens barrel is covered with a dome-shaped cover. And the imaging signal from an imaging block is connected to the monitor of a monitoring room by a coaxial cable.
- a coaxial cable is connected to the back, and then fixed to the ceiling or wall of the building with an embedded metal fitting.
- the lens is adjusted to a predetermined orientation (direction and angle) by the angle adjustment mechanism of the lens barrel, and the focus and zoom of the lens are set.
- a portable monitor is used while confirming the imaging direction and imaging range while viewing the monitor image at the installation site.
- a dome-shaped cover is attached to the front side to prevent dust, and a series of installation work is completed.
- the lens orientation is set by adjusting the angle of the lens barrel.
- a technique using a ball joint is known as an angle adjustment mechanism. That is, the rotating sphere portion provided at the base end of the lens barrel can be rotated and adjusted in the pan direction and the tilt direction, and the rotating sphere portion can be fixed to the support member provided on the pedestal by the retaining member. Yes (for example, see Patent Document 1)
- Dome cameras are installed on walls, ceilings, etc., and may be installed on inclined walls. Depending on the installation location, an image may be obtained in which the top and bottom of the captured image is inverted or tilted in an oblique direction. As a mechanism for correcting such an image, there is a camera having a function called rotate.
- the rotatable part including the lens can be rotated to obtain an image that is correctly tilted up and down and not tilted.
- the lens can be rotated.
- Rotating the part provided to be rotatable for example, when there is a rotation of 360 degrees or more, there is a possibility that the cable is disconnected.
- the cable may come off. If such a cable is disconnected, the reliability of the product may be lowered, and it is necessary to prevent it.
- the present technology has been made in view of such a situation, and is intended to prevent a cable from being detached from a portion provided to be rotatable.
- An imaging device includes an optical block configured by a lens, an imaging block configured by an imaging device, the optical block and the imaging block, and a spherical rotating sphere that is larger than a hemisphere.
- a lens barrel, a circular opening having an inner diameter smaller than the diameter of the rotating sphere, a support member for mounting the rotating sphere on the outside of the opening, and a diameter of the rotating sphere A circular opening having a smaller inner diameter, and a retaining member that accommodates the rotating sphere to prevent the lens barrel from falling inside the opening, and the imaging block includes the rotating sphere.
- At least a part of the optical block is positioned inside a virtual whole sphere obtained by extending the spherical surface of the rotating sphere, and two grooves are provided on the surface of the rotating sphere. , Said retaining The wood, projections in contact with the surface of the rotating spherical portion.
- the protrusion can be made of an elastic member.
- the protrusion is configured by a plate-like spring, and the width of the spring is equal to or less than the width of the groove, and the protrusion that configures the virtual whole ball between the two grooves has the The rotation of the rotating sphere can be stopped by contacting one end of the plate-like spring.
- the protrusion is constituted by a plate-like spring, and the width of the spring is larger than the width of the groove, and the protrusion that constitutes the virtual whole ball between the two grooves has the plate-like shape.
- the groove may be provided on the surface of the rotating sphere as an arc whose central angle is an angle greater than a movable range in the tilt direction of the lens barrel.
- the protrusion is configured by a combination of a column and a spring, and the state where the column is in contact with the surface of the rotating sphere can be maintained by the force of the spring.
- An imaging device includes an optical block configured by a lens, an imaging block configured by an imaging device, an optical block and an imaging block, and a spherical rotating sphere that is larger than a hemisphere.
- a circular opening is formed, and a retaining member is provided that accommodates the rotating sphere inside the opening and prevents the lens barrel from coming off.
- two grooves are provided on the surface of the rotating sphere, and a protrusion that contacts the surface of the rotating sphere is provided on the retaining member.
- a monitoring dome-type camera 10 is taken as an example of the lens barrel rotation type imaging device.
- the dome-type camera 10 of the present embodiment is installed on the ceiling or wall of a hospital, hotel, department store, etc. for the purpose of ensuring safety and improving serviceability, etc., and performs monitoring with a captured image. It is.
- FIG. 1 is an external view showing a dome-type camera 10 according to the present embodiment.
- FIG. 1A is a side view of the dome-type camera 10 and
- FIG. 1B is a perspective view thereof.
- the dome-type camera 10 of the present embodiment has an appearance in which a dome-shaped (hemispherical) cover 20 is attached to a case 30 and is installed on a ceiling, a wall, or the like by a pedestal 40. The When installed on the ceiling, the cover 20 faces downward and the pedestal 40 is located on the upper side (ceiling side), contrary to the direction shown in FIG.
- the cover 20 is a light-transmitting molded product (acrylic resin injection-molded product).
- the optical refractive index is 1.5
- the light transmittance is as high as 90% or more
- the dome-shaped camera 10 generally finishes the cover 20 to be translucent so that imaging can be performed while not being noticed as much as possible.
- carbon materials are mixed during injection molding, and the light transmittance is adjusted to give a smoke finish, or the surface is coated with a metal powder such as aluminum to give a half mirror finish. And the light absorption rate are about 33%.
- the case 30 is a molded product (molded product such as ABS resin) and is formed in a cylindrical shape.
- the cover 20 is detachably attached to the case 30. That is, three protruding pieces (not shown) are formed at equal intervals of 120 ° on the circular peripheral edge of the cover 20, and the case 30 has three cutting pieces corresponding to the protruding pieces. A notch (not shown) is formed.
- the cover 20 when the cover 20 is attached, the protruding pieces of the cover 20 are simultaneously inserted into the notches of the case 30 and the cover 20 is rotated. Will be held.
- the cover 20 in order to remove the cover 20 from the case 30, the cover 20 may be rotated in the opposite direction, and the protrusions may be pulled out from the notches, contrary to the attachment.
- a lens barrel 50 (see A in FIG. 1) containing the optical block 70 and the imaging block 80 is disposed inside the cover 20 and the case 30, and the lens barrel 50 is rotatable on the pedestal 40. Is retained. Therefore, if the cover 20 is removed from the case 30 and the lens barrel 50 is set to a desired direction and angle, a desired position can be monitored from the captured image. Further, by attaching the translucent cover 20 to the case 30, the lens barrel 50 (optical block) can be hidden from view from the outside.
- the dome-type camera 10 including the cover 20 and the case 30 is installed on a ceiling or a wall by a pedestal 40. That is, the pedestal 40 includes a disk-like base 41 die-cast with a metal such as an aluminum alloy, and is installed on a ceiling or the like using an embedded metal fitting (not shown) attached to the base 41.
- the dome-type camera 10 is installed, it is connected to the monitor in the monitoring room by a coaxial cable, but the coaxial cable is also embedded in the ceiling or the like and hidden from view from the outside.
- FIG. 2 is an external view showing the pedestal 40 and the lens barrel 50 in the dome-type camera 10 of the present embodiment.
- FIG. 2A is a side view of the pedestal 40 and the lens barrel 50, and
- FIG. It is a perspective view.
- the dome-shaped camera 10 shown in FIG. 1 when the cover 20 and the case 30 are removed, the pedestal 40 and the lens barrel 50 are exposed as shown in FIG.
- the pedestal 40 is installed on the base 41 of the disk shape, the support member 42 on which the rotating sphere portion 52 of the lens barrel 50 is placed, and the rotating sphere portion 52 is accommodated so that the lens barrel 50 can be removed. And a cylindrical retaining member 43 for preventing the above.
- a circuit in which various electronic components for photoelectrically converting the light and darkness of the image formed on the imaging surface of the imaging element into the amount of electric charges and sequentially reading out and converting them into electric signals is mounted on the base 41.
- a substrate 60 is attached.
- the circuit board 60 functions as a signal processing board and a power supply board, and includes a monitor output terminal, a coaxial cable terminal, other switches, a volume, and the like.
- the support member 42 includes a disk-shaped movable plate 44 on which the rotating sphere portion 52 is placed and presses the rotating sphere portion 52 toward the retaining member 43, and a fixing screw 45 that reciprocates the movable plate 44.
- the movable plate 44 is a peripheral portion of the movable plate 44 and rotates around a rotation shaft 46 provided on the support member 42, and the fixing screw 45 is attached to the support member 42 on the side opposite to the rotation shaft 46. It is provided and screwed into the peripheral edge of the movable plate 44.
- the lens barrel 50 can be rotated in the pan direction and the tilt direction by the rotating sphere 52, and the lens 71 can be set in a desired direction (direction and angle). Note that a focus ring 53 and a zoom lever 54 are attached to the lens barrel 50, and light from the imaging target can be imaged on the imaging surface of the imaging element with a desired size.
- the lens barrel 50 is configured to be rotatable in the rotate direction.
- the dome-shaped camera 10 shown in FIGS. 1 to 3 is installed on a wall, a ceiling, or the like, and may be installed on an inclined wall or the like. Depending on the installation location, an image may be obtained in which the top and bottom of the captured image is inverted or tilted in an oblique direction. As a mechanism for correcting such an image, there is a camera having a function called rotate.
- the lens 71 (lens barrel 50) can be rotated, and the lens can be rotated to an angle at which an image that is not tilted correctly is obtained. It is structured.
- the camera 10 to which the present technology is applied is provided with a stopper for the rotation direction so that the lens barrel 50 does not rotate more than a predetermined angle when it is rotated in the rotation direction. It is supposed to be configured. This stopper will be described with reference to FIG.
- FIG. 3 is a cross-sectional view showing the dome type camera 10.
- the dome-type camera 10 shown in FIG. 3 uses a relatively small lens 71, the present technology is not a description showing that the present technology is applied only to such a lens 71.
- the optical block 70 constituted by the lens 71 is accommodated in a lens barrel 50 including a cylindrical portion 51 and a rotating sphere portion 52.
- the lens barrel 50 is die-cast with a metal such as an aluminum alloy.
- the lens 71 is a varifocal lens or the like composed of a plurality of relatively small combination lenses.
- the entire cylindrical portion 51 forms the optical block 70.
- the optical block 70 is positioned so that the optical block 70 is located inside a virtual whole sphere (a virtual whole sphere indicated by a dotted line in FIG. 3) obtained by extending the spherical surface of the spherical rotating sphere 52 larger than the hemisphere, except for the lens 71.
- About half of the front end side (lens 71 side) of the block 70 is disposed outside the rotating sphere portion 52, and the remaining half of the rear end side of the optical block 70 is disposed in the hollow portion of the rotating sphere portion 52.
- the CCD device 81 is a relatively small device that matches the size of the lens 71, and the imaging block 80 constituted by the CCD device 81 is entirely located in the rotating sphere portion 52. That is, the imaging block 80 is configured by a CCD substrate or the like on which the CCD device 81 is mounted in addition to the relatively small CCD device 81, and is on the rear end side of the optical block 70 and on the optical axis of the lens 71. A device 81 is arranged. Therefore, the entire imaging block 80 is located in the hollow part of the rotating sphere part 52.
- the imaging signal of the CCD device 81 is sent to the circuit board 60 by a harness (not shown) that is a bundle of electrical wiring.
- the lens barrel 50 accommodates the optical block 70 configured by the relatively small lens 71 and the imaging block 80 configured by the relatively small CCD device 81, and the optical block 70 includes the cylindrical portion 51.
- the imaging block 80 is disposed in a rotating sphere portion 52 in which about half of the cylindrical portion 51 is embedded.
- the lens barrel 50 including the cylindrical portion 51 and the rotating sphere portion 52 is rotatably held by the pedestal 40.
- the camera 10 uses a support member 42, a retaining member 43, and a rotating sphere 52 as an angle adjustment mechanism using a ball joint.
- the support member 42 constituting the angle adjusting mechanism includes a bottomed cylindrical movable plate 44 in which a circular opening 44 a having an inner diameter smaller than the diameter of the rotating sphere portion 52 is formed.
- the movable plate 44 is formed by die-casting with a metal such as an aluminum alloy.
- the peripheral portion is supported by the insertion of the rotation shaft 46 provided on the support member 42, and the support member 42 on the opposite side of the rotation shaft 46.
- the peripheral edge of the opposite side is supported by screwing of the fixing screw 45 provided in. Therefore, the movable plate 44 can place the rotating sphere part 52 outside the opening 44a, and the placed rotating sphere part 52 can freely rotate outside the opening 44a.
- the retaining member 43 is a bottomless cylindrical member die-cast with a metal such as an aluminum alloy, and a circular opening 43a having an inner diameter smaller than the diameter of the rotating sphere 52 is formed. . And it fixes to the supporting member 42 on the outer side of the movable plate 44, the cylindrical part 51 and the rotating sphere part 52 (part) are protruded from the opening 43a, and the rotating sphere part 52 (mostly in the space with the movable plate 44). ).
- the spherical surface closer to the cylindrical portion 51 than the hemisphere is constrained by the peripheral edge portion of the opening 43a, and the removal from the retaining member 43 is prevented.
- the rotating sphere portion 52 is accommodated while the spherical surface is fitted between the opening portion 43a of the retaining member 43 and the opening portion 44a of the movable plate 44, but the peripheral edge portion (or opening portion) of the opening portion 43a.
- the lens 71 can be set in a predetermined direction (direction and angle) by freely rotating the lens barrel 50 in the pan direction, the tilt direction, and the rotate direction and adjusting the direction as appropriate.
- the lens barrel 50 is fixed as shown in FIG. That is, when the fixing screw 45 is screwed in, the movable plate 44 is rotated around the rotation shaft 46 along with it, and the movable plate 44 that is separated from the retaining member 43 on the fixing screw 45 side approaches the retaining member 43. (Move as indicated by the arrow in FIG. 3). Then, the rotating ball portion 52 placed outside the opening 44 a of the movable plate 44 also moves toward the opening 43 a of the retaining member 43.
- the peripheral edge portion of the opening 44 a contacts the spherical surface of the rotating sphere portion 52 and presses the rotating sphere portion 52, but the moving direction of the movable plate 44 and the moving direction of the rotating sphere portion 52 coincide. (Both move in the direction of the arrow shown in FIG. 3), so the positional relationship between the movable plate 44 and the rotating sphere 52 (the direction of the lens barrel 50) does not change. That is, since the movable plate 44 does not rotate relative to the rotating sphere portion 52, a frictional force that rotates the rotating sphere portion 52 is not generated, and the moving direction of the movable plate 44 (shown in FIG. 3). It is only necessary to press the rotating sphere 52 in the same direction as the arrow direction. Therefore, the rotating sphere 52 is directed to the opening 43 a of the retaining member 43 while maintaining the same position outside the opening 44 a of the movable plate 44.
- the rotating sphere 52 When the spherical surface of the rotating sphere 52 comes into contact with the peripheral edge of the opening 43a, the rotating sphere 52 is pressed by the opening 43a as shown in FIG. Since the pressure is pressed between the opening 43 a of 43 and the opening 44 a of the movable plate 44, the rotating ball portion 52 is fixed to the movable plate 44 without moving. As a result, the lens barrel 50 is fixed without moving in the adjusted pan direction, tilt direction, and rotate direction, and the azimuth (direction and angle) of the lens 71 is accurately set.
- the dome-shaped camera 10 can set the direction and angle of the lens barrel 50 (the orientation of the lens 71) easily and accurately by rotating the rotating sphere 52 and fixing it. A desired position can be monitored by attaching the cover 20 and capturing an image.
- the rotating sphere portion can be used as long as it can be disposed in the hollow portion of the rotating sphere portion 52.
- the lens 71 (cylindrical portion 51) can be increased in size without increasing the radius from the rotation center 52 to the lens 71. Therefore, it is possible to increase the brightness of the lens 71 and improve the image quality while using the same cover 20.
- the pan direction and the tilt direction are configured to be movable within a predetermined angle, for example, the pan direction is within a range of ⁇ 30 degrees, and the tilt direction is within a range of 0 to 90 degrees.
- the lens 71 is placed in the direction in which the user wants to take an image. Therefore, the pan direction and the tilt direction are often adjusted as fine adjustments after installation. Therefore, if the pan direction and the tilt direction are configured to move within a predetermined angle range, the lens barrel 50 can be directed in a direction desired by the user.
- Rotate direction is a direction that may move greatly depending on the location where the camera 10 is installed. For example, when the camera 10 is installed on the ceiling and when it is installed on a desk or the like, the vertical direction of the captured image is completely different. In consideration of rotating 50, it is considered that the rotation direction is more preferable as the movable range is larger.
- the rotating sphere portion 52 by providing the rotating sphere portion 52, it can be configured to be movable in the rotate direction, and can be configured to rotate within a range of 360 degrees. However, if the structure can be rotated within a range of 360 degrees and the structure does not have a stopper, the lens barrel 50 can be rotated in the rotate direction desired by the user. If the cable is rotated too much, the cable may come off.
- a configuration will be described in which a stopper is provided to enable movement within a predetermined range in the rotate direction, and the predetermined range is within a range close to 360 degrees.
- the configuration is not limited to the pan direction and the tilt direction, but the pan direction and the tilt direction can be performed as described above.
- FIGS. 4 and 5 are diagrams for explaining the stopper in the rotation direction.
- the stopper is provided on the retaining member 43 and the rotating ball portion 52.
- a stopper spring 101 is provided on a part of the retaining member 43.
- the stopper spring 101 will be described as an example, but other members other than the spring may be used, and any member having the function described below may be used.
- FIG. 4 shows a plate-like spring commonly referred to as a leaf spring.
- the description is continued by taking as an example the case where a leaf spring is used as the stopper spring 101.
- the rotating sphere portion 52 is provided with two grooves 121-1 and 121-2, and a protrusion 122 is provided between the grooves 121-1 and 121-2. ing.
- the projection 122 constitutes a virtual whole globe (portion indicated by a dotted line in FIG. 3) of the rotating sphere portion 52, and the tip of the projection 122 is a curved surface constituting a sphere.
- the groove 121-1 and the groove 121-2 are configured such that a portion constituting the virtual whole sphere of the rotating sphere portion 52 is shaved. In the following description, the groove 121-1 and the groove 121-2 are simply referred to as the groove 121 when it is not necessary to distinguish them individually.
- the stopper spring 101 and the groove 121 when functioning as a stopper will be described with reference to FIG.
- the stopper spring 101 is in contact with a part of the rotating sphere 52.
- the stopper spring 101 is configured to be able to maintain a state where it is always in contact with the rotating ball portion 52. It is assumed that the rotating sphere 52 is rotated rightward as shown in the figure. While the rotating sphere 52 is rotating, the stopper spring 101 is maintained in contact with the rotating sphere 52 as shown in the figure.
- the groove 121-1 provided on the surface of the rotating sphere portion 52 is positioned at a position where the stopper spring 101 is provided.
- the stopper spring 101 is in contact with the spherical portion of the rotating sphere portion 52 while the rotating sphere portion 52 is rotating.
- the stopper spring 101 contacts the groove 121-1. It becomes a state.
- the rotating sphere 52 is rotated leftward at time T1. Even when the rotating sphere 52 is rotated to the left, the stopper spring 101 is in contact with the spherical portion of the rotating sphere 52 while the rotating sphere 52 is rotating, as in the case of being rotated to the right. When positioned in the groove 121-2, the spring 1212 comes into contact with the groove 121-2 by the elastic force of the spring.
- the stopper spring 101 is configured such that at least a part thereof is always in contact with the spherical surface of the rotating sphere portion 52 and the groove 121.
- the stopper spring 101 is a plate-shaped spring called a plate spring, for example.
- the leaf spring has a shape like a plate having a predetermined width and thickness, and the shape can be processed into a desired shape relatively easily.
- the leaf spring (stopper spring 101) shown in FIG. 5 has a shape in which one end is locked to the retaining member 43 and the other end is partially bent so as to contact the rotating ball portion 52. Has been. Such a processed leaf spring can be used as the stopper spring 101.
- a stopper spring 101a as shown in FIG. 7 may be used.
- the stopper spring 101 a shown in FIG. 7 includes a column 151 and a spring 152.
- the cylinder 151 has a cylindrical shape, but the shape may be a column other than the cylinder.
- the cylinder 151 is provided in a state of penetrating a hole provided in the retaining member 43.
- the cylinder 151 is configured so that the state of being in contact with the rotating sphere portion 52 is always maintained by the elastic force of the spring 152.
- the rotating ball portion 52 rotates and the stopper spring 101 a is positioned at the position of the groove 121, the cylinder 151 is positioned in the groove 121.
- the cylindrical ball 151 When the cylindrical ball 151 is positioned in the groove 121, when the rotating sphere 52 is further rotated, the cylindrical column 151 comes into contact with the protrusion 122 and cannot be rotated any further. As described above, if the configuration in which the cylinder 151 is always in contact with the rotating sphere 52 is maintained by the elastic force of the spring 152, the shape and size of the cylinder 151 and the position and size of the spring 152 are maintained. The size can be changed as appropriate.
- the stopper spring 101 may be formed in such a shape as a protrusion.
- any protrusion may be provided on the retaining member 43 as long as the protrusion has a certain degree of elasticity and can maintain a state in which the protrusion is always in contact with the surface of the rotating ball portion 52.
- stopper spring 101 may be composed of a single member such as a leaf spring, or may be composed of two or more different members such as the column 151 and the spring 152.
- the groove 121 is provided as a line having a predetermined width on the surface of the rotating sphere portion 52.
- the length of the groove 121 may be provided from one end to the other end of the spherical portion of the rotating sphere portion 52, or may be provided within a predetermined angle a as shown in FIG. .
- the groove 121 is provided from the position P ⁇ b> 1 to the position P ⁇ b> 2 in the spherical shape of the rotating sphere portion 52.
- the angle a is obtained.
- the length of the groove 121 needs to consider the movable range in the tilt direction.
- the lens barrel 50 needs to be configured to be movable in the tilt direction.
- the movable range in the tilt direction is the angle b
- the angle a in which the groove 121 is provided is preferably equal to or greater than the angle b. That is, it is preferable that the groove 121 is provided so that the angle a ⁇ the angle b is satisfied.
- the groove 121 is provided on the surface of the rotating sphere 52 as an arc whose central angle is an angle greater than or equal to the movable range in the tilt direction of the lens barrel 50.
- the width of the groove 121 will be described.
- the description will be continued with an example in which a plate spring is used as the stopper spring 101.
- the width of the stopper spring 101 is W1 and the width of the groove 121 is W2, the width of the stopper spring 101 and the groove so that the relationship of width W1 ⁇ width W2 is satisfied.
- a width of 121 is set.
- the stopper spring 101 fits within the width of the groove 121, and the stopper spring 101 reliably hits the protrusion 122 and functions as a stopper.
- the width of the stopper spring 101 is W3 and the width of the groove 121 is W2, the width of the stopper spring 101 is such that the relationship of width W2 ⁇ width W3 is satisfied. And the width of the groove 121 is set.
- a triangle is formed in which the stopper spring 101 is the hypotenuse and the groove 121 and a part of the protrusion 122 are two sides.
- one end of the stopper spring 101 abuts against the protrusion 122, so that it functions as a stopper. Therefore, even when the width of the stopper spring 101 and the width of the groove 121 are set so that the relationship of width W2 ⁇ width W3 is satisfied, the function as a stopper can be realized.
- the shape of the groove 121 will be described.
- the angle formed by the groove 121 and the protrusion 122 is an angle c, and is a right angle in the above embodiment. explained.
- the angle d formed by the groove 121 and the protrusion 122 may be 90 degrees or less. Further, as shown in FIG. 10C, the angle e formed by the groove 121 and the protrusion 122 may be 90 degrees or more.
- the groove 121 may have a stepped shape. Moreover, as shown to E of FIG. 10, the groove
- channel 121 may be a curved surface.
- the groove 121 has such a shape that when the rotating sphere portion 52 is rotated, the stopper spring 101 is smoothly drawn into the groove 121 from the curved surface of the rotating sphere portion 52 and, for example, there is no feeling of catching. Is preferred. Further, it is preferable that the groove 121 and the protrusion 122 have a shape that ensures that the stopper spring 101 contacts the protrusion 122 after the stopper spring 101 is positioned in the groove 121.
- the width of the protrusion 122 in other words, the distance between the groove 121-1 and the groove 121-2 is preferably short.
- the width of the protrusion 122 affects the movable range.
- the portion of the width of the protrusion 122 is a range in which the rotating sphere portion 52 cannot be moved by the control of the stopper. Therefore, if the width of the protrusion 122 is wide, the range in which the rotating ball portion 52 can rotate becomes small.
- the width of the protrusion 122 is narrow, the range in which the rotating sphere 52 can rotate is close to 360 degrees. Therefore, the width of the protrusion 122 is preferably narrow.
- the stopper spring 101 is provided. And it is comprised so that the state which the stopper spring 101 may touch so that the surface of the rotating ball parts 52 other than the protrusion 122 may slide smoothly may be maintained.
- the dome-type camera 10 has been described as an example.
- the present technology is not a description in which the application range is limited to the dome-type camera 10.
- the present technology can also be applied to a case where a rotatable member is provided and control is required to rotate the rotatable member in a predetermined direction, in the example described above, in the rotate direction.
- this technology can also take the following structures.
- the imaging block is disposed inside the rotating sphere, At least a part of the optical block is located inside a virtual whole sphere obtained by extending the spherical surface of the rotating sphere, Two grooves are provided on the surface of the rotating sphere,
- the imaging device according to (1) wherein the protrusion is configured by a member having elasticity.
- the protrusion is composed of a plate-like spring, The width of the spring is less than or equal to the width of the groove; The imaging device according to (1), wherein one end of the plate-like spring is in contact with a protrusion that forms the virtual whole sphere between the two grooves, thereby stopping the rotation of the rotating sphere.
- the protrusion is composed of a plate-like spring, The width of the spring is larger than the width of the groove, The imaging device according to (1), wherein one end of the plate-like spring is in contact with a protrusion that forms the virtual whole sphere between the two grooves, thereby stopping the rotation of the rotating sphere.
- the imaging device according to any one of (1) to (4), wherein the groove is provided on a surface of the rotating sphere as an arc having a central angle greater than a movable range in a tilt direction of the lens barrel.
- the protrusion is composed of a combination of a column and a spring, The imaging device according to (1), wherein the state in which the column body is in contact with the surface of the rotating sphere is maintained by the force of the spring.
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Abstract
Description
なお、説明は、以下の順序で行う。
1.撮像装置の外観の構造
2.撮像装置の内部の構造
3.ストッパー構造
4.ストッパーの他の形状
以下、図面を参照して、本発明の一実施の形態について説明する。なお、以下の実施の形態では、鏡筒回転型撮像装置として、監視用のドーム型のカメラ10を例に挙げている。すなわち、本実施の形態のドーム型のカメラ10は、安全性の確保やサービス性の向上等を目的として、病院、ホテル、デパート等の天井や壁等に設置され、撮影画像によって監視を行うものである。
図3は、ドーム型のカメラ10を示す断面図である。図3に示すドーム型のカメラ10は、比較的小さいレンズ71を使用したものを示しているが、本技術は、このようなレンズ71に対してのみ適用されることを示す記載ではない。
パン方向やチルト方向は、所定の角度、例えば、パン方向は、±30度の範囲、チルト方向は、0乃至90度の範囲で可動できるように構成されている。ユーザは、カメラ10を設置する時点で、撮影したい方向にレンズ71を向けて設置するため、設置後の微調整として、パン方向やチルト方向の調整が行われることが多い。よって、パン方向やチルト方向は、所定の角度範囲内で可動するように構成されていれば、ユーザが望む方向に鏡筒50を向けることができる。
このように、ストッパーバネ101は、回転球部52の球面および溝121に常に少なくとも一部分が接する構成とされている。このような状態を維持するために、ストッパーバネ101は、例えば板バネなとど称される板形状のバネが用いられる。板バネは、図5に示したように、所定の幅と厚みを有する板のような形状であり、その形状は、比較的容易に所望の形状に加工できるものである。
レンズによって構成される光学ブロックと、
撮像素子によって構成される撮像ブロックと、
前記光学ブロック及び前記撮像ブロックを収容し、半球よりも大きい球状の回転球部を有する鏡筒と、
前記回転球部の直径よりも小さい内径を有する円形の開口部が形成され、前記開口部の外側に前記回転球部を載置する支持部材と、
前記回転球部の直径よりも小さい内径を有する円形の開口部が形成され、前記開口部の内側に前記回転球部を収容して前記鏡筒の抜けを防止する抜止め部材と
を備え、
前記撮像ブロックは、前記回転球部の内部に配置され、
前記光学ブロックの少なくとも一部は、前記回転球部の球面を延長した仮想の全球の内部に位置し、
前記回転球部の表面には、2本の溝が設けられ、
前記抜止め部材には、前記回転球部の表面に接する突部が設けられている
撮像装置。
(2)
前記突部は、弾性力を有する部材で構成されている
前記(1)に記載の撮像装置。
(3)
前記突部は、板状のバネで構成され、
前記バネの幅は、前記溝の幅の大きさ以下であり、
前記2本の溝の間の前記仮想の全球を構成する突部に、前記板状のバネの一端が接することで、前記回転球部の回転をとめる
前記(1)に記載の撮像装置。
(4)
前記突部は、板状のバネで構成され、
前記バネの幅は、前記溝の幅の大きさより大きく、
前記2本の溝の間の前記仮想の全球を構成する突部に、前記板状のバネの一端が接することで、前記回転球部の回転をとめる
前記(1)に記載の撮像装置。
(5)
前記溝は、前記鏡筒のチルト方向の可動範囲以上の角度を中心角とする円弧として、前記回転球体の表面に設けられる
前記(1)乃至(4)のいずれかに記載の撮像装置。
(6)
前記突部は、柱体とバネの組み合わせで構成され、
前記バネの力により、前記回転球部の表面に前記柱体が接している状態が維持される
前記(1)に記載の撮像装置。
Claims (6)
- レンズによって構成される光学ブロックと、
撮像素子によって構成される撮像ブロックと、
前記光学ブロック及び前記撮像ブロックを収容し、半球よりも大きい球状の回転球部を有する鏡筒と、
前記回転球部の直径よりも小さい内径を有する円形の開口部が形成され、前記開口部の外側に前記回転球部を載置する支持部材と、
前記回転球部の直径よりも小さい内径を有する円形の開口部が形成され、前記開口部の内側に前記回転球部を収容して前記鏡筒の抜けを防止する抜止め部材と
を備え、
前記撮像ブロックは、前記回転球部の内部に配置され、
前記光学ブロックの少なくとも一部は、前記回転球部の球面を延長した仮想の全球の内部に位置し、
前記回転球部の表面には、2本の溝が設けられ、
前記抜止め部材には、前記回転球部の表面に接する突部が設けられている
撮像装置。 - 前記突部は、弾性力を有する部材で構成されている
請求項1に記載の撮像装置。 - 前記突部は、板状のバネで構成され、
前記バネの幅は、前記溝の幅の大きさ以下であり、
前記2本の溝の間の前記仮想の全球を構成する突部に、前記板状のバネの一端が接することで、前記回転球部の回転をとめる
請求項1に記載の撮像装置。 - 前記突部は、板状のバネで構成され、
前記バネの幅は、前記溝の幅の大きさより大きく、
前記2本の溝の間の前記仮想の全球を構成する突部に、前記板状のバネの一端が接することで、前記回転球部の回転をとめる
請求項1に記載の撮像装置。 - 前記溝は、前記鏡筒のチルト方向の可動範囲以上の角度を中心角とする円弧として、前記回転球体の表面に設けられる
請求項1に記載の撮像装置。 - 前記突部は、柱体とバネの組み合わせで構成され、
前記バネの力により、前記回転球部の表面に前記柱体が接している状態が維持される
請求項1に記載の撮像装置。
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CN201480046321.3A CN105474619B (zh) | 2013-08-30 | 2014-08-15 | 成像装置 |
US14/910,727 US10165164B2 (en) | 2013-08-30 | 2014-08-15 | Image pickup apparatus having rotating sphere section and stopper structure for limiting rotation of the rotating sphere section |
EP14840428.8A EP3041214B1 (en) | 2013-08-30 | 2014-08-15 | Imaging device |
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JP2013179603A JP2015050543A (ja) | 2013-08-30 | 2013-08-30 | 撮像装置 |
JP2013-179603 | 2013-08-30 |
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CN107577047B (zh) * | 2017-05-27 | 2020-12-29 | 深圳多哚新技术有限责任公司 | 一种虚拟现实设备 |
US10721400B2 (en) | 2017-06-08 | 2020-07-21 | Hangzhou Hikvision Digital Technology Co., Ltd. | Spherical camera |
US10533876B2 (en) * | 2017-08-04 | 2020-01-14 | Ford Global Technologies, Llc | Sensor assembly with a cover forming a spherical joint |
IT201700107036A1 (it) * | 2017-09-25 | 2019-03-25 | Inxpect S P A | Dispositivo elettronico di rilevamento del movimento |
EP3700183B1 (en) * | 2019-02-20 | 2020-12-16 | Axis AB | Camera |
US11519784B2 (en) * | 2020-05-25 | 2022-12-06 | Viettel Group | Thermal imaging radar |
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EP3041214A4 (en) | 2017-04-05 |
US20160182783A1 (en) | 2016-06-23 |
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EP3041214B1 (en) | 2019-10-16 |
EP3041214A1 (en) | 2016-07-06 |
CN105474619A (zh) | 2016-04-06 |
CN105474619B (zh) | 2019-04-23 |
US10165164B2 (en) | 2018-12-25 |
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