JP4834537B2 - Lens apparatus and lens system - Google Patents

Description

  The present invention relates to a lens apparatus and a lens system, and more specifically, a lens apparatus having a variable power lens moving mechanism for moving a variable power lens group and / or a focal lens moving mechanism for moving a focal lens group, and the lens apparatus. A lens system comprising:

  In recent years, surveillance cameras such as CCDs are frequently used in stores such as the financial industry and retail industry. In this type of surveillance camera, a varifocal lens capable of manually adjusting an angle of view and a focus is applied together with a zoom lens and a fixed focus lens.

  The fixed focus lens can adjust the focus but cannot adjust the angle of view. Therefore, when installing the fixed focus lens, it is necessary to prepare a plurality of lenses and select a lens that can obtain a desired photographing condition. The zoom lens has a lens configuration that can adjust the angle of view and does not change the focal point even when the angle of view is adjusted. The shooting conditions can be easily obtained. On the other hand, the varifocal lens can adjust the angle of view, but does not have a lens configuration that does not change the focal point even if the angle of view is adjusted, so the focus is readjusted every time the angle of view is adjusted. There is a need. However, varifocal lenses are often used for surveillance cameras because they do not have a complicated lens structure as zoom lenses and can reduce the manufacturing cost.

  The installation of the surveillance camera is completed when the camera is installed on the ceiling or wall of the store, the optical axis of the lens is set in a predetermined direction, and the angle of view and focus of the lens are adjusted appropriately. Here, the angle of view and the focus of the varifocal lens are conventionally adjusted by adjusting a manual adjustment unit provided in the lens body, but in recent years, there has been a demand for electric adjustment by remote operation for the following reasons. Has occurred.

  In other words, the focal point of a varifocal lens is usually adjusted by temporarily connecting a monitor to the camera and checking the image displayed on the monitor. However, manual adjustment is difficult. In addition, since fine adjustment is required as the image quality of the camera increases, manual focus adjustment may be difficult. Further, in the dome type surveillance camera, the dome is mounted after the angle of view and the focus are adjusted. However, the optical path length is changed by the mounting of the dome, and the adjusted focus is displaced. Therefore, it is necessary to repeat manual adjustment of the focus and detachment of the dome through trial and error, which may make it difficult to install the monitoring camera.

  For this reason, the following Patent Document 1 discloses an electric varifocal lens that can adjust the angle of view and the focus with an operation switch and automatically adjust the photographing conditions by setting predetermined adjustment conditions in advance.

Japanese Patent Laid-Open No. 2001-21785

  With a varifocal lens, it is necessary to adjust the focus every time the angle of view is adjusted, but since this adjustment is essentially required only at the time of installation, it is an expensive system with a zoom lens only for this adjustment. The need to build is low. On the other hand, the efficiency of adjustment work is slightly inferior to that of a zoom lens, but an inexpensive system can be constructed by applying electric adjustment by remote control such as infrared rays or weak radio waves to a varifocal lens. However, there is a possibility that the adjusted angle of view and focus may be easily changed due to an erroneous operation or a criminal disturbing action during monitoring after installation adjustment.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved lens device that can be switched to a state in which adjustment of the angle of view and / or focus by remote control is possible / impossible, and To provide a lens system including the lens device.

In order to solve the above problems, according to a first aspect of the present invention, a lens device for a surveillance camera comprising a variable power lens moving mechanism for moving a variable power lens group and a focus lens moving mechanism for moving a focus lens group. Because
A zoom lens driving unit that moves the zoom lens group in the optical axis direction via the zoom lens moving mechanism;
A focus lens driving unit that moves the focus lens group in the optical axis direction via the focus lens moving mechanism;
A receiving unit for receiving an operation signal for remotely operating the zoom lens driving unit and the focus lens driving unit;
A control unit that generates a control signal for controlling the zoom lens driving unit and the focus lens driving unit based on the operation signal, and
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
It has a switch for controlling the operating power supplied to the control unit, and the switch is controlled in conjunction with the switching means.

  According to such a configuration, since the variable power lens and the focus lens driving unit are controlled based on the operation signal for remote operation, an inexpensive control system is constructed as compared with the control system applied to the zoom lens. . In addition, a switching means is provided for switching to a state where reception of an operation signal is enabled or disabled, so that remote operation can be performed only at the time of installation and disabled during monitoring. There is no fear that the adjusted angle of view and focus are easily changed by the disturbing action.

According to a second aspect of the present invention, there is provided a lens device for a surveillance camera comprising a variable power lens moving mechanism for moving a variable power lens group,
A zoom lens driving unit that moves the zoom lens group in the optical axis direction via the zoom lens moving mechanism;
A receiving unit for receiving an operation signal for remotely operating the zoom lens driving unit;
A control unit that generates a control signal for controlling the zoom lens driving unit based on the operation signal, and
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
It has a switch for controlling the operating power supplied to the control unit, and the switch is controlled in conjunction with the switching means.

  According to such a configuration, the switching means for switching to the state in which the operation signal can be received or disabled is provided, so that the remote operation of the zoom lens can be performed only at the time of installation, and can be disabled at the time of monitoring. There is no fear that the adjusted angle of view can be easily changed due to an erroneous operation during monitoring or an act of obstructing a criminal.

According to a third aspect of the present invention, there is provided a lens device for a surveillance camera comprising a focal lens moving mechanism for moving a focal lens group,
A focus lens driving unit that moves the focus lens group in the optical axis direction via the focus lens moving mechanism;
A receiving unit for receiving an operation signal for remotely operating the focus lens driving unit;
A control unit for generating a control signal for controlling the focus lens driving unit based on the operation signal,
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
It has a switch for controlling the operating power supplied to the control unit, and the switch is controlled in conjunction with the switching means.

  According to such a configuration, the switching means for switching to a state where reception of an operation signal is enabled or disabled is provided, so that the remote operation of the focus lens can be performed only at the time of installation and can be disabled during monitoring. There is no fear that the adjusted focus can be easily changed due to misoperation during surveillance or obstruction of criminals.

  A switching means control unit for controlling the switching means is provided, and a control switch for controlling the switching means is provided through the switching means control unit so that the operation signal can be received or cannot be received. May be. According to such a configuration, since the switching means is controlled by the control switch, the remote operation can be made possible or impossible by operating the control switch at the time of installation and when the installation is completed.

  A control signal for controlling the switching means may be generated based on the operation signal so that the operation signal cannot be received. According to such a configuration, the switching unit is controlled so that the operation signal cannot be received by the control signal generated based on the operation signal. Therefore, when the installation is completed, the control switch is operated to control the switching unit. There is no need.

Furthermore, according to a fourth aspect of the present invention, there is provided a lens system including a variable power lens moving mechanism for moving the variable power lens group and a lens device for a surveillance camera having a focus lens moving mechanism for moving the focus lens group. And
A zoom lens driving unit that moves the zoom lens group in the optical axis direction via the zoom lens moving mechanism, and a focus lens drive that moves the focus lens group in the optical axis direction via the focus lens moving mechanism A lens unit, and
A receiving unit for receiving an operation signal for remotely operating the zoom lens driving unit and the focus lens driving unit;
A control unit that generates a control signal for controlling the zoom lens driving unit and the focus lens driving unit based on the operation signal, and
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
It has a switch for controlling the operating power supplied to the control unit, and the switch is controlled in conjunction with the switching means.

  ADVANTAGE OF THE INVENTION According to this invention, a lens apparatus which can be switched to the state which enables / disables the adjustment by a remote operation of an angle of view and / or a focus, and a lens system provided with the said lens apparatus are provided.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  FIG. 1 is a perspective view showing an example of a surveillance camera to which a varifocal lens according to an embodiment of the present invention is applied. As shown in FIG. 1, the surveillance cameras 200 and 200 ′ have a dome-like appearance, and are mounted on the base 202, the dome 204, the camera main body mounted on the base 202 inside the dome 204, and the camera main body. Lenses 100 and 100 ′. The varifocal lenses 100 and 100 ′ can be mounted so that the angle with respect to the base 202 can be changed (tilt rotation) and / or the center 202 can be rotated about the center line as a rotation axis (pan rotation).

  As shown in FIG. 1, inside the dome 204, a cover 206 can be put on the lenses 100 and 100 ′. The cover 206 is provided with an opening 207 corresponding to the tilt rotation range of the lenses 100 and 100 ′. The cover 206, together with the lenses 100 and 100 ', can be mounted on the base 202 so as to be rotatable about the center line as a rotation axis. The dome 204 including the lenses 100 and 100 ′ is at a predetermined position that covers at least the shooting range of the lenses 100 and 100 ′ and the zoom and focus rings 33 and 43 for the purpose of protecting the lenses 100 and 100 ′ and concealing the shooting direction. Provided.

  On the outer periphery of the varifocal lenses 100 and 100 ′, a zoom ring 33 for adjusting the angle of view and a focus ring 43 for adjusting the focus are provided. The zoom and focus rings 33 and 43 are a zoom lens (group) 36 (corresponding to a “variable magnification lens group”) and a focus lens (group) 46 (a “focus lens group”) included in the varifocal lenses 100 and 100 ′. Corresponding to the respective positions of the lenses 100 and 100 ′, the lens barrel is provided on the rear side (photographer side) and front side (subject side) of the lens barrel.

  FIG. 2 is an exploded perspective view showing the varifocal lens according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view along the optical axis showing the lens body of the varifocal lens shown in FIG. In FIG. 3, only the lens body is shown, and components other than the lens body are omitted. As shown in FIGS. 2 and 3, the varifocal lenses 100 and 100 ′ according to the present embodiment include a lens body, a zoom driving unit 10 (corresponding to a “magnifying lens driving unit”), and a focus driving unit 20 ( It corresponds to a “focus lens driving unit”), and includes control units 80 and 80 ′ for controlling the zoom and focus driving units 10 and 20, and receiving units 60 and 60 ′ for receiving signals for remote operation.

  First, the lens body will be described. The lens body includes a zoom movement mechanism 30 (corresponding to a “magnifying lens movement mechanism”), a focus movement mechanism 40 (corresponding to a “focal lens movement mechanism”), and a diaphragm adjustment mechanism provided between both adjustment sections. 50 or the like. As shown in FIG. 3, the lens body includes fixed cylinders 31 and 41, and lens frames 32 and 42 are disposed inside the fixed cylinders 31 and 41. In addition, zoom and focus rings 33 and 43 are disposed on the outer periphery of the fixed cylinders 31 and 41.

  The lens frame 42 is disposed on the front side (subject side) inside the fixed cylinder 41 and holds the focus lens (group) 46. Engagement pins 44 projecting from the peripheral surface are attached to the lens frame 42. On the other hand, a rectilinear groove 45 is formed in the fixed cylinder 41 in the direction of the optical axis P, and the engaging pin 44 engages with the rectilinear groove 45, whereby the lens frame 42 and the focus ring 43 are guided by the rectilinear groove 45. And configured to move straight in the direction of the optical axis P.

  The lens frame 32 is disposed on the rear side (photographer side) of the lens frame 42 inside the fixed cylinder 31 and holds the zoom lens (group) 36. The lens frame 32 is provided with an engagement pin 34 that protrudes from the peripheral surface thereof. On the other hand, a rectilinear groove 35 is formed in the fixed cylinder 31 in the optical axis direction, and the lens pin 32 and the zoom ring 33 are guided by the rectilinear groove 35 by engaging the engaging pin 34 with the rectilinear groove 35. It is configured to move straight in the direction of the optical axis P. FIG. 3 shows a case where the zoom lens (group) 36 and the focus lens (group) 46 are each configured as a single lens, but the present invention is not limited to such a configuration.

  The focus ring 43 is rotatably disposed on the outer peripheral surface of the fixed cylinder 41 at a portion where the lens frame 42 is disposed. A cam groove 47 is formed spirally with respect to the optical axis P on the inner peripheral surface of the focus ring 43. The engagement pin 44 attached to the lens frame 41 engages with the cam groove 47 of the focus ring 43. Therefore, when the focus ring 43 is rotated, the intersection position of the cam groove 47 of the focus ring 43 and the rectilinear groove 45 of the fixed cylinder 41 moves in the optical axis P direction, and the engagement pin 44 and the lens frame are moved according to the intersection position. 42 and the focus lens 46 move in the direction of the optical axis P. Thus, by rotating the focus ring 43, the focus lens 46 is adjusted by adjusting the setting position of the focus lens 46.

  The zoom ring 33 is disposed on the rear side of the focus ring 43 and is rotatably disposed on the outer peripheral surface of the fixed cylinder 31. The zoom ring 33 is provided with an extension 39 on the focus ring 43 side. In the extension part 39, the inner diameter of the zoom ring 33 is enlarged so as to cover the outer periphery of the focus ring 43. A cam groove 37 is formed spirally with respect to the optical axis P on the inner peripheral surface of the zoom ring 33. The engagement pin 34 attached to the lens frame 31 engages with the cam groove 37 of the zoom ring 33. Therefore, when the zoom ring 33 is rotated, the intersection position of the cam groove 37 of the zoom ring 33 and the rectilinear groove 35 of the fixed cylinder 31 moves in the direction of the optical axis P, and the engagement pin 34 and the lens frame are moved according to the intersection position. 31 and the zoom lens 36 move in the direction of the optical axis P. In this manner, by rotating the zoom ring 33, the setting position of the zoom lens 36 is adjusted and the angle of view is adjusted.

  In the above configuration, the straight movement grooves 35 and 45 are provided in the fixed cylinders 31 and 41, and the spiral cam grooves 37 and 47 are provided in the zoom and focus rings 33 and 43. Cam grooves 37 and 47 may be provided, and linear cam grooves 37 and 47 may be provided on the zoom or focus rings 33 and 43. Further, spiral cam grooves 37 and 47 may be provided in both the fixed cylinders 31 and 41 and the zoom or focus rings 33 and 43.

  A gear portion 48 is provided on the outer periphery at the front end of the focus ring 43, and the focus ring 43 is rotated when the gear portion 48 rotates. In addition, a gear portion 38 is provided on the outer periphery at the front end portion of the zoom ring 33, and the zoom ring 33 is rotated by the rotation of the gear portion 38.

  The aperture adjustment mechanism 50 is interposed between the zoom movement mechanism 30 and the focus movement mechanism 40, and includes an aperture frame 52 having an opening / closing unit (not shown) for adjusting the aperture, and a drive unit that drives the aperture frame 52. 51 or the like. In the aperture adjustment mechanism 50, the aperture drive unit 51 is controlled by a control signal output via a cable 53 from an aperture control unit (not shown) mounted on the camera to which the lens body is mounted, so that the aperture is controlled. The opening and closing of the frame 52 is automatically adjusted.

  On the rear side of the fixed cylinder 31, a mounting frame 54 for mounting the lens body on the camera body or the like in a replaceable manner is provided. The mounting frame 54 is formed in a substantially cylindrical shape, and includes an annular mounting portion 55 at the rear end. The mounting portion 55 has a screw portion 56 formed on the outer peripheral surface, and is engaged with a screw portion formed on a mounting portion (not shown) of the camera body so that the lens body can be mounted on the camera body or the like in a replaceable manner. To do.

  Next, the zoom and focus drive units 10 and 20 will be described. In addition, since both the drive mechanisms 10 and 20 are equipped with the mutually same structure, below, especially the zoom drive part 10 is demonstrated.

  As shown in FIG. 2, the zoom driving unit 10 includes a motor 12 that supplies a driving force to the zoom moving mechanism 30, a driving gear 14 that transmits the driving force of the motor 12 to the zoom ring 33, and the like. Here, for example, a direct current motor or the like is applied as the motor 12, but the motor 12 is not limited to such a case. The zoom drive unit 10 is attached to an attachment part (not shown) of the lens body via the attachment member 18 so that the drive gear 14 meshes with a gear part 38 provided on the outer periphery of the zoom ring 33. The drive gear 14 includes a gear shaft 15 fixed to the shaft 13 of the motor 12, and the drive gear 14 rotates when the rotational force of the motor shaft 13 is transmitted to the drive gear 14 via the gear shaft 15.

  The zoom and focus driving units 10 and 20 are driven and controlled by control units 80 and 80 'described later. Here, as shown in FIG. 2, in the lens body, the gear portions 38 and 48 of the zoom and focus rings 33 and 43 mesh with the drive gears 14 and 24, respectively, and the zoom and focus rings 33 and 43 can rotate. As described above, the zoom and focus driving units 10 and 20 are attached. Therefore, when a drive voltage is supplied to the motor 12 of the zoom drive unit 10 via the control units 80 and 80 ', the motor 12 is activated to drive the zoom ring 33 via the drive gear 14 and the gear unit 38. The force is transmitted and the zoom ring 33 rotates. Thereby, the rotational movement of the zoom ring 33 is converted into the straight movement of the zoom lens 36 via the zoom movement mechanism 30, so that the zoom can be adjusted electrically.

  Next, a receiving unit that receives an operation signal for remotely operating the zoom and focus driving unit of the varifocal lens according to the present invention will be described. FIG. 4 is a perspective view (partial perspective view) showing the receiving unit according to the first embodiment of the present invention. FIG. 4 shows the receiving unit in a state (a) where the operation signal can be received and a state (b) where the operation signal cannot be received. Here, the receiving unit 300 shown in FIG. 4 corresponds to the receiving unit 60 shown in FIG.

  The receiving unit 300 receives a remote operation signal transmitted from a remote control device or the like, such as infrared rays or weak radio waves. In the following, a case where infrared rays are used as a signal for remote control, including other embodiments, will be described. However, the application range of the present invention is not limited only to infrared rays.

  The receiving unit 300 according to this embodiment is connected to a control unit 80 described later, and includes a case unit 310, a support unit 330 that supports the case unit 310, a shutter 340 that blocks reception of operation signals, and the like. In the case of a dome type surveillance camera, necessary measures are taken such as selecting the material and structure of the dome 204 so that the input of the operation signal to the receiving unit 300 is not blocked by the dome 204.

  The case unit 310 includes a light receiving element 312 that converts received infrared light into an electric signal, an output circuit (not shown) that outputs the converted electric signal to a control unit, and the like. In order to protect the light receiving element 312, a translucent screen 314 that covers the light receiving element 312 is provided on the front surface (light receiving surface) of the case unit 310. In addition, a guide mechanism including a guide groove 316 and the like is provided on the side wall portion 318 extending on the front surface of the case portion 310 so that the shutter 340 can slide on the front surface of the screen 314.

  As the light receiving element 312, for example, a thermal element such as a thermal expansion type, a pyroelectric type, a thermocouple type, or a resistance type that uses the thermal action of infrared rays, or a mass of energy (photon quantum or photon, For example, a quantum type element such as a phototube type, a photoconductive type, or a junction type, which functions as a photon, is applied. The light receiving element 312 absorbs infrared energy as heat, and utilizes a phenomenon in which changes in surface charge, thermoelectromotive force, and electric resistance appear due to the accompanying temperature rise. In general, the thermal element has low sensitivity and slow response, but the sensitivity is constant regardless of the infrared wavelength, so it can be applied to the entire infrared region and is particularly useful for measuring the total energy of light. It is. On the other hand, the quantum element has a high sensitivity and a high-speed response. However, since the sensitivity depends on the wavelength, the sensitivity is lost in a long wavelength region longer than the cutoff wavelength.

  For example, as shown in FIG. 2A, the support portion 330 is provided to support the case portion 310 on the attachment portion 18 of the zoom and focus drive portions 10 and 20. The case member 310 may be supported not only in a fixed support but also in a rotatable state via the support portion 330. In this case, since the inclination angle of the light receiving surface with respect to the fixed portion can be changed, the reception (light reception) direction can be adjusted. Although FIG. 4 shows a case where the support portion 330 is configured as a rod-shaped member, the present invention is not limited to this case, and may be configured as a plate-shaped member or a plurality of members, for example. The support unit 330 may have a configuration that includes a cable or the like that connects the receiving unit 300 and components other than the receiving unit 300.

  The shutter 340 is a light-shielding (infrared shielding) plate-like member, and is provided on the front surface (light-receiving surface) of the case unit 310 so that reception of an operation signal can be blocked. The shutter 340 is inserted into a guide groove 316 provided in the side wall portion 318 of the case portion 310, and is slid up and down manually. The shutter 340 may be provided with a grip portion 344 for manual operation. As shown in FIG. 4B, when the shutter 340 is closed so as to shield the light receiving surface, reception of the operation signal is blocked by the infrared shielding shutter 340. The shape of the shutter 340 is not limited to a plate shape, and may be formed in a dome shape, for example.

  In the receiving unit 300, for example, a locking projection 346 provided at the lower end of the sliding surface 342 of the shutter 340 and a locking hole 322 provided in the upper portion of the guide groove 316 so as to engage with the locking projection 346. The latching | locking part comprised as is provided. Since the shutter 340 is locked with respect to the guide groove 316 when the locking protrusion 346 is engaged with the locking hole 322, the shutter 340 is maintained in the open state. In addition, the structure arrangement | positioning of a latching | locking part is not limited to this case. For example, a structural arrangement in which the lower end surface of the shutter 340 is supported by a locking protrusion elastically supported on the upper portion of the guide groove 316 can be applied. In this case, the protruding end of the locking protrusion is positioned on the sliding surface of the guide groove 316 in a state where it comes into contact with the sliding surface 342 of the shutter 340, and the contact with the sliding surface 342 of the shutter 340 is cut off. , And operates so as to protrude from the sliding surface of the guide groove 316.

  The receiving unit 300 is provided with a contact terminal whose contact is controlled according to opening / closing of the shutter 340. The contact terminals are configured as, for example, a fixed terminal 320 provided at the lower front surface of the case portion 310 and a movable terminal 348 provided at the lower end surface of the shutter 340, and the fixed terminal 320 can be a cable (not shown) or the like. It may be connected to the control unit 80 via The contact terminal is configured such that the movable terminal 348 contacts the fixed terminal 320 when the shutter 340 is completely closed, and is disconnected when the shutter 340 is opened. Thereby, in the control part 80, the opening / closing state of the shutter 340 can be detected through the contact of the contact terminal. The structural arrangement of the contact terminals is not limited to this case. For example, a structural arrangement in which the fixed terminal and the movable terminal are provided at the lower end of the guide groove 316 and the lower end of the sliding surface 342 of the shutter 340 can be applied.

  FIG. 5 is a perspective view (partial perspective view) showing a receiving unit according to the second embodiment of the present invention. FIG. 5 shows the receiving unit in a state (a) where the operation signal can be received and a state (b) where the operation signal cannot be received. Here, the receiving unit 300 ′ illustrated in FIG. 5 corresponds to the receiving unit 60 ′ illustrated in FIG. 2 and others. In the description of the present embodiment, a duplicate description of the same components as in the first embodiment is omitted.

  The receiving unit 300 ′ according to the present embodiment is connected to a control unit 80 ′ to be described later, and includes a case unit 310, a support unit 330, a shutter 340 ′, and the like, and a shutter driving mechanism that opens and closes the shutter 340 ′. The

  The shutter driving mechanism includes a motor 362 that supplies a driving force required to open and close the shutter 340 ′, an opening and closing gear 368 for opening and closing the shutter 340 ′, and a driving gear group that transmits the driving force of the motor 362 to the opening and closing gear 368. 366 or the like. Here, for example, a DC motor is applied as the motor 362, but the motor 362 is not limited to such a case. The shutter drive mechanism is attached to the case portion 310 so that the opening / closing gear 368 meshes with a gear groove 350 provided on the back surface of the shutter 340 '. The drive gear group 366 includes, for example, a first drive gear 366a (spar gear; spur gear) fixed to the motor shaft 364 and a second drive gear 366b (bevel gear) disposed between the first drive gear 366a and the open / close gear 368. A bevel gear).

  Thereby, the rotational force of the motor shaft 364 is transmitted to the first drive gear 366a, and the rotational force of the first drive gear 366a is transmitted to the second drive gear 366b having an intersecting axis with respect to the motor shaft 354. The second drive gear 366b rotates. Therefore, when a drive voltage is supplied to the motor 362, the motor 362 is operated, so that a driving force is transmitted to the open / close gear 368 via the drive gear group 366, and the rotational movement of the open / close gear 368 causes the gear of the shutter 340 ' The shutter 340 ′ can be opened and closed by being converted into the vertical motion of the shutter 340 ′ via the groove 350.

  FIG. 6 is a perspective view (partial perspective view) showing a receiving unit according to the third embodiment of the present invention. FIG. 6 shows the receiving unit in a state (a) where the operation signal can be received and a state (b) where the operation signal cannot be received. Here, the receiving unit 400 shown in FIG. 6 corresponds to the receiving unit 60 shown in FIG. In the description of the present embodiment, a duplicate description of the same components as those in the first or second embodiment is omitted.

  The receiving unit 400 according to the present embodiment is connected to a control unit 80 described later, and includes a case unit 410, a support unit 430 that supports the case unit 410, a cover 440 that blocks reception of operation signals, and the like.

  A connection portion 424 for rotatably supporting the case portion 410 with respect to the support portion 430 is provided on the side surface of the case portion 410. By being connected to the support portion 430 via the connection portion 424, the inclination angle of the light receiving surface with respect to the support portion 430 can be changed, so that the reception (light reception) direction can be adjusted.

  The cover 440 is a light-shielding (infrared shielding) plate-like member, and is provided so as to be fixed to the support portion 430 below the case portion 410 so that reception of an operation signal can be cut off. As shown in FIG. 6B, when the case portion 410 is rotated so that the light receiving surface faces the cover 440, the reception of the operation signal is blocked by the infrared shielding cover 440. In addition, the structure arrangement | positioning of the cover 440 is not limited to such a case, For example, you may make it provide in the back of the case part 410. FIG.

  The receiving unit 400 is provided with a contact terminal whose contact is controlled according to the direction of the light receiving surface. The contact terminals are configured as, for example, a fixed terminal 448 provided on the front wall portion 442 of the cover 440 and a movable terminal 420 provided on the lower front surface of the case portion 410, and the fixed terminal 448 is a cable (not shown). It may be configured to be connected to the control unit 80 via, for example. The contact terminal is configured such that when the case 410 is operated in a state where an operation signal can be received, the movable terminal 420 and the fixed terminal 448 are in contact with each other, and when the case 410 is operated in a state where reception is not possible, the contact is disconnected. The Thereby, in the control part 80, it becomes possible to detect the direction of the light receiving surface through the contact of the contact terminal. The structural arrangement of the contact terminals is not limited to this case. For example, a structural arrangement in which the fixed terminal and the movable terminal are respectively provided on the lower rear surface of the case portion 410 and the rear wall portion of the cover 440 can be applied.

  FIG. 7 is a perspective view (partial perspective view) showing a receiving unit according to the fourth embodiment of the present invention. FIG. 7 shows the receiving unit in a state (a) where the operation signal can be received and a state (b) where the operation signal cannot be received. Here, the receiving unit 400 ′ illustrated in FIG. 7 corresponds to the receiving unit 60 ′ illustrated in FIG. 2 and others. In the description of the present embodiment, a duplicate description of the same components as in the third embodiment is omitted.

  The receiving unit 400 ′ according to the present embodiment is connected to a control unit 80 ′, which will be described later, and includes a case driving mechanism that rotationally drives the case unit 410 together with the case unit 410, the support unit 430, the cover 440, and the like. .

  The case driving mechanism includes a motor 462 that supplies a driving force required to rotate the case portion 410, a rotation gear 468 for rotating the case portion 410, and a drive gear group that transmits the driving force of the motor 462 to the rotation gear 468. 466, a fixed shaft 470 and a fixed gear 472 for rotating the case portion 410 by the rotation of the rotation gear 468. Here, for example, a DC motor is applied as the motor 462, but the motor 462 is not limited to such a case. The case drive mechanism is attached to the case portion 410 so that the rotation gear 468 engages with a fixed gear 472 fixed to a support shaft 470 fixed to the support portion 430. The drive gear group 466 includes, for example, a first drive gear 466a (spar gear; spur gear) fixed to the motor shaft 464 and a second drive gear 466b (bevel gear) disposed between the first drive gear 466a and the rotation gear 468. A bevel gear).

  Thereby, the rotational force of the motor shaft 464 is transmitted to the first drive gear 466a, and the rotational force of the first drive gear 466a is transmitted to the second drive gear 466b having an intersecting axis with respect to the motor shaft 464. The second drive gear 466b rotates. Therefore, when a driving voltage is supplied to the motor 462, the driving force is transmitted to the rotating gear 468 via the driving gear group 466 by operating the motor 462, and the rotating motion of the rotating gear 468 fixes the support shaft 470. By converting the rotational movement of the case portion 410 via the gear 472, the case portion 410 including the case drive mechanism can be rotated.

  Next, a control unit and a receiving unit that control the zoom and focus driving unit of the varifocal lens according to the present invention will be described. FIG. 8 is a block diagram schematically showing the configuration of the control unit and the receiving unit according to the first and third embodiments of the present invention.

  As shown in FIG. 8, the control unit 80 according to the present embodiment controls the first and second motor driving units 86 a and 86 b that respectively drive the motors 12 and 22 and the driving of the motors 12 and 22. The first and second motor control units 84a and 84b, the controller 82 that controls the entire control unit 80 including the motor control units 84a and 84b, and the like. The control unit 80 includes a power supply control unit 90, and operates the controller 82, the reception unit 60, and the like by operating power supplied from an external power supply 210 such as a camera via the power supply control unit 90. The control unit 80 includes a reception control unit 88 and controls input of an operation signal input from the reception unit 60 via the reception control unit 88.

  The controller 82 is connected to the reception control unit 88 and the motor control units 84a and 84b, generates a control signal according to an operation signal input via the reception control unit 88, and outputs the control signal to the motor control units 84a and 84b. . The first and second motor control units 84a and 84b generate drive signals for driving the motors 12 and 22 in accordance with the control signals input from the controller 82, and output the drive signals to the motor drive units 86a and 86b. The first and second motor drive units 86a and 86b determine the rotation direction and rotation speed of the motors 12 and 22 according to the drive signals input from the motor control units 84a and 84b, and rotate the motors 12 and 22. Generate drive voltage.

  The control unit 80 is provided with a switch 72 that controls the operation power supplied from the power supply control unit 90 to the controller 82 and the reception unit 60 via the contact terminals of the reception unit 60. FIG. 8 shows a case where the switch 72 provided in the power supply control unit 90 is directly connected to the receiving unit 60. However, the present invention is not limited to this case. For example, the switch 72 may be connected via the controller 82. Good.

  Hereinafter, an installation procedure of the monitoring camera 200 including the varifocus lens 100 according to the present embodiment will be described. At the time of installation, the monitoring camera 200 is installed on the ceiling, wall surface, etc. of the store, and switching is performed so that the receiving unit 60 can switch to a state in which the operation signal can be received with the optical axis P of the lens 100 set in a predetermined direction. The means 62 is operated. The switching means 62 means the shutter 340 in the first embodiment and the case member 410 in the second embodiment. Therefore, in the first embodiment, the shutter 340 is manually opened as shown in FIG. 4A, and in the third embodiment, the light receiving surface faces the operator side as shown in FIG. 6A. Thus, the case member 410 is manually rotated. In the case of a dome-type monitoring camera, the dome 204 is mounted on the camera side at this point in consideration of changes in the optical path length due to the mounting of the dome.

  When a receivable state is ensured, the switch 72 of the power control unit 90 is closed via the contact terminal. Here, when the switch 72 is closed, it is possible to supply operating power to the controller 82, the receiving unit 60, and the like. As a result, it becomes possible to remotely control the angle of view and the focus by the operation signal.

  The installer adjusts the angle of view and the focus by operating the remote control device while confirming the video displayed on the monitor connected to the camera. An operation signal output by operating the remote control device is input to the control unit 80 via the receiving unit 60. The operation signal input to the control unit 80 is input to the controller 82 via the reception control unit 88.

  The controller 82 generates a control signal according to the input operation signal and outputs the control signal to the motor controllers 84a and 84b. The first and second motor control units 84a and 84b generate drive signals for driving the motors 12 and 22 in accordance with the control signals input from the controller 82, and output the drive signals to the motor drive units 86a and 86b. The first and second motor drive units 86a and 86b determine the operating conditions of the motors 12 and 22 according to the drive signals from the motor control units 84a and 84b, and generate drive voltages for rotating the motors 12 and 22. .

  When a drive voltage is supplied from the control unit 80 to the motors 12 and 22 of the zoom and focus drive units 10 and 20, the motors 12 and 22 are operated, whereby the zoom and focus rings are connected via the drive gears 14 and 24. The driving force is transmitted to 33 and 43, and the gear portions 38 and 48 rotate. Thereby, the rotation movement of the gear portions 38 and 48 is converted into the straight movement of the zoom and focus lenses 36 and 46 via the zoom and focus movement mechanisms 30 and 40, so that the zoom or focus is adjusted electrically.

  On the other hand, when the installation is completed, the switching unit 62 is operated so that the receiving unit 60 is switched to a state in which the operation signal cannot be received. Here, in the first embodiment, the shutter 340 is manually closed as shown in FIG. 4B, and in the third embodiment, the light receiving surface faces the cover 440 as shown in FIG. 6B. Thus, the case portion 410 is manually rotated. In the case of a dome type surveillance camera, the dome 204 is removed before the switching means 62 is operated, and the dome 204 is attached again after the operation. When the reception is disabled, the switch 72 of the power control unit 90 is opened through the contact terminal.

  Here, when the switch 72 is opened, the supply of operating power to the controller 82, the receiving unit 60, and the like is cut off. As a result, the remote control of the angle of view and the focus by the operation signal is disabled, and the power supply from the external power supply 210 to the control unit 80 is cut off, so that the power supply from the external power supply 210 becomes unnecessary.

  When the angle of view and the focus are adjusted again after the installation is completed, the switching means 62 is operated so that the operation signal can be received, and the same installation procedure as in the installation is repeated. In the case of a dome type surveillance camera, the dome 204 is removed before the operation for operating the switching means 62.

  As described above, according to the present embodiment, since the zoom and focus driving units 10 and 20 are controlled based on the operation signal for remote operation, the cost is lower than that of the control system applied to the zoom lens. A simple control system. In addition, a switching means 62 is provided for switching to a state in which the operation signal can be received or disabled, so that the remote operation can be performed only at the time of installation and disabled at the time of monitoring. There is no fear that the adjusted angle of view and focus can be easily changed by the obstruction of the person.

  Furthermore, since the switch 72 is controlled in conjunction with the switching means 62, it is possible to supply operating power only during installation and not during monitoring. Therefore, it is not necessary to maintain the supply of operating power during monitoring.

  FIG. 9 is a block diagram schematically showing the configuration of the control unit and the receiving unit according to the second and fourth embodiments of the present invention. Hereinafter, the present embodiment will be described with reference to FIG. In the description of the present embodiment, a duplicate description of the same components as those in the first or third embodiment is omitted.

  The control unit 80 ′ is provided with a switch 72 ′ for controlling the operation power supplied from the external power source 210 to the controller 82 ′, the reception unit 60 ′, etc. via the power control unit 90 ′ via the control switch 70. . FIG. 9 shows a case where the switch 72 ′ is connected to the receiving unit 60 ′ via the control switch 70. However, the present invention is not limited to this case. For example, the switch 72 ′ may be connected via the controller 82 ′. Good.

  On the other hand, as shown in FIG. 2A, for example, as shown in FIG. 2A, the rear side of the mounting portion 18 of the zoom and focus drive units 10 and 20 is close to the lens barrel so that the operation signal can be received or disabled. Thus, a control switch 70 for controlling the switching means 62 ′ is provided. The switching means 62 'means the shutter 340' and the shutter driving mechanism in the second embodiment, and the case portion 410 and the case driving mechanism in the fourth embodiment, respectively. Therefore, the opening and closing of the shutter 340 ′ is switched in the second embodiment, and the direction of the light receiving surface of the case portion 410 is switched in the fourth embodiment via the control switch 70. The control switch 70 directly or indirectly controls the power supply control switch 72 '.

  The receiving unit 60 ′ is provided with a switching unit 62 ′, a switching unit driving unit 64 that drives the switching unit 62 ′, and a switching unit control unit 66 that controls the switching unit driving unit 64. The switching means control section 66 is connected to the control switch 70, the reception control section 88 'of the control section 80', the power supply control section 90 ', and the switching means drive section 64, respectively.

  The switching means controller 66 generates a control signal for controlling the switching means driver 64 in accordance with the state of the control switch 70, the control signal output from the reception controller 88 ′, and the operation signal received from the remote control device. . In addition, the switching unit controller 66 generates a control signal for controlling the power supply control switch 72 '. The switching unit driving unit 64 generates a drive signal and a driving voltage for driving the switching unit 62 ′ in accordance with the control signal generated by the switching unit control unit 66.

  Hereinafter, an installation procedure of the monitoring camera 200 ′ including the varifocus lens 100 ′ according to the present embodiment will be described. When the control switch 70 is manually operated at the time of installation, the switch 72 ′ of the power control unit 90 is closed via the control switch 70. In the case of a dome-type monitoring camera, the dome 204 is mounted on the camera side at this point in consideration of changes in the optical path length due to the mounting of the dome.

  When the switch 72 ′ is closed, it becomes possible to supply operating power to the controller 82 ′ and the receiving unit 60 ′. When the operation power is supplied, the controller 82 ′ sends a control signal for controlling the switching means 62 ′ to the reception control unit 88 ′ so that the receiving unit 60 ′ can be switched to a state in which the operation signal can be received. To the switching means control section 66.

  When receiving the control signal from the controller 82 ′, the switching unit control unit 66 generates a control signal for controlling the switching unit driving unit 64 and outputs the control signal to the switching unit driving unit 64. The switching means driving unit 64 generates a drive signal and a driving voltage for driving the switching means 62 'based on the control signal, and outputs the drive signal and drive voltage to the switching means 62'. Accordingly, the switching unit 62 'is driven so that the receiving unit 60' can be switched to a state in which the operation signal can be received. That is, in the second embodiment, the shutter 340 ′ is opened as shown in FIG. 5A, and in the fourth embodiment, the light receiving surface faces the operator side as shown in FIG. 7A. The case member 410 is rotated.

  As a result, it becomes possible to remotely control the angle of view and the focus by the operation signal. The installer adjusts the angle of view and the focus by operating the remote control device.

  On the other hand, when the control switch 70 is manually operated upon completion of the installation, the switching unit control unit 66 generates a control signal for controlling the switching unit driving unit 64 and outputs the control signal to the switching unit driving unit 64. The switching means driving unit 64 generates a drive signal and a driving voltage for driving the switching means 62 'based on the control signal, and outputs the drive signal and drive voltage to the switching means 62'. Accordingly, the switching unit 62 'is driven so that the receiving unit 60' can be switched to a state in which the operation signal cannot be received. That is, in the second embodiment, the shutter 340 ′ is closed as shown in FIG. 5B, and in the fourth embodiment, the light receiving surface is opposed to the cover 440 as shown in FIG. 7B. The case member 410 is rotated. In the case of a dome type surveillance camera, the dome 204 is removed before the operation of the control switch 70, and the dome 204 is attached again after the operation.

  When the driving of the switching unit 62 'is completed, the switching unit control unit 66 generates a control signal for opening the power control switch 72' and outputs it to the power control unit 90 '. Opening the switch 72 'cuts off the supply of operating power to the controller 82' and the receiver 60 '.

  As a result, remote control of the angle of view and the focus by the operation signal is disabled, and the power supply from the external power source 210 to the controller 82 ′ and the receiving unit 60 ′ is cut off. Is no longer necessary.

  When the installation is completed, instead of manually operating the control switch 70, the switching means 62 'may be controlled by a signal for remote operation by the remote control device. In this case, the switching unit control unit 66 generates a control signal for controlling the switching unit driving unit 64 according to the operation signal. The switching unit 62 ′ is driven so that the receiving unit 60 ′ can be switched to a state in which the operation signal cannot be received based on the control signal. When the driving of the switching means 62 'is completed, the switch 72' is opened, and the supply of operating power to the controller 82 'and the receiving unit 60' is cut off. The control signal generated based on the operation signal may be generated by the controller 82 ′ instead of being generated by the switching unit controller 66.

  As a result, in the case of a dome-type surveillance camera, manual operation of the control switch 70 is unnecessary, so that the dome 204 is not required to be attached or detached. Note that after the switching means 62 'is controlled so that the operation signal cannot be received, the control by the remote operation signal becomes impossible.

  When the angle of view and the focus are adjusted again after the installation is completed, the switching means 62 ′ is operated so that the operation signal can be received via the control switch 70, and the same installation procedure as that at the time of installation is repeated. In the case of a dome type surveillance camera, the dome 204 is removed before the operation for the operation of the control switch 70.

  As described above, according to the present embodiment, since the switching means 62 'is controlled by the control switch 70, a remote operation is enabled or disabled by operating the control switch 70 at the time of installation and when the installation is completed. Can be. Further, since the switching means 62 ′ is controlled by the control signal generated based on the operation signal so that the operation signal cannot be received, when the installation is completed, the control switch 70 is operated to control the switching means 62 ′. There is no need to do.

  Further, since the switch 72 'is controlled in conjunction with the switching means 62', it is possible to supply operating power only during installation and not during monitoring. Therefore, it is not necessary to maintain the supply of operating power during monitoring.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above-described embodiment, the case where the lenses 100 and 100 ′ include the zoom and focus driving units 10 and 20 and the zoom and focus moving mechanisms 30 and 40 has been described. However, the application target of the present invention is not limited to such a case. For example, the lenses 100 and 100 ′ include the zoom driving unit 10 and the zoom moving mechanism 30, and do not include the focus driving unit 20 and the focus moving mechanism 40. In the case where the zoom driving unit 10 and the zoom moving mechanism 30 are not provided, or in the case where the focus driving unit 20 and the focus moving mechanism 40 are provided, the same applies.

  In the above description, the embodiment in which the lenses 100 and 100 ′ are varifocal lenses is illustrated, but the application target of the present invention is not limited to such a case. That is, the present invention can be similarly applied to the case where the lenses 100 and 100 'are applied to, for example, a fixed focus lens that requires only focus adjustment and a view angle that is fixed, or a zoom lens that requires angle of view and focus adjustment. Is something.

  For example, in the above description, the varifocal lenses 100 and 100 ′ are the zoom and focus moving mechanisms 30 and 40, the zoom and focus driving units 10 and 20, the receiving units 60 and 60 ′, the control units 80 and 80 ′, the switching unit, and the like. Has been described. However, the application target of the present invention is not limited to such a case. For example, in a lens system in which a part of the above-described components such as a reception unit and a control unit are provided in the camera body instead of the lens, The same applies.

  For example, in the above description, an embodiment in which the varifocal lenses 100 and 100 ′ are applied to a dome type surveillance camera is illustrated, but the application target of the present invention is not limited to such a case. . That is, the present invention can be similarly applied to various monitoring cameras that are not limited to the dome shape or camera devices other than the monitoring camera.

  In the above description, the driving force of the zoom and focus lens driving mechanisms 10 and 20 and the shutter and case driving mechanism is applied to the zoom and focus moving mechanisms 30 and 40, and the shutter 340 ′ and the case portion 410 via the gear mechanism. Although the embodiment in the case of being transmitted is illustrated, the application target of the present invention is not limited to such a case. That is, the present invention can be similarly applied to a case where a belt mechanism or the like is used instead of the gear mechanism.

  In the above description, an embodiment in which reception of an operation signal is blocked by the shutter mechanism is illustrated, but the application target of the present invention is not limited to this case. That is, the present invention can be similarly applied to a case where reception of an operation signal is interrupted by, for example, a flap mechanism instead of the shutter mechanism.

  In the above description, the embodiment in which the reception of the operation signal is blocked by the rotation mechanism of the case unit 410 is illustrated, but the application target of the present invention is not limited to this case. That is, the present invention can be similarly applied to a case where reception of an operation signal is interrupted by a mechanism for storing the case unit 410 as necessary, for example, instead of the rotation mechanism.

It is a perspective view which shows an example of the surveillance camera to which the varifocal lens which concerns on embodiment of this invention is applied. It is a disassembled perspective view which shows the varifocal lens which concerns on embodiment of this invention. It is sectional drawing along an optical axis which shows the lens main body of the varifocal lens shown in FIG. It is a perspective view (partial perspective view) which shows the receiving part which concerns on the 1st Embodiment of this invention. It is a perspective view (partial perspective view) which shows the receiving part which concerns on the 2nd Embodiment of this invention. It is a perspective view (partial perspective view) which shows the receiving part which concerns on the 3rd Embodiment of this invention. It is a perspective view (partial perspective view) which shows the receiving part which concerns on the 4th Embodiment of this invention. It is a block diagram which shows typically the structure of the control part and receiving part which concern on the 1st and 3rd embodiment of this invention. It is a block diagram which shows typically the structure of the control part and receiving part which concern on the 2nd and 4th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Zoom drive part 20 Focus drive part 30 Zoom movement mechanism 40 Focus movement mechanism 50 Aperture adjustment mechanism 60, 60 'Receiving part 62, 62' Switching means 64 Switching means driving part 66 Switching means control part 70 Control switch 72, 72 'switch 80, 80 'control unit 82, 82' controller 84a, 84b motor control unit 86a, 86b motor drive unit 88, 88 'reception control unit 90, 90' power supply control unit 100, 100 'varifocal lens 210 external power supply

Claims (6)

A lens device for a surveillance camera comprising a variable magnification lens moving mechanism for moving a variable magnification lens group and a focal lens moving mechanism for moving a focal lens group,
A zoom lens driving unit that moves the zoom lens group in the optical axis direction via the zoom lens moving mechanism;
A focus lens driving unit that moves the focus lens group in the optical axis direction via the focus lens moving mechanism;
A receiving unit for receiving an operation signal for remotely operating the zoom lens driving unit and the focus lens driving unit;
A control unit that generates a control signal for controlling the zoom lens driving unit and the focus lens driving unit based on the operation signal, and
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
A lens apparatus comprising: a switch for controlling an operating power supplied to the control unit, wherein the switch is controlled in conjunction with the switching unit . A lens device for a surveillance camera having a zoom lens moving mechanism for moving a zoom lens group,
A zoom lens driving unit that moves the zoom lens group in the optical axis direction via the zoom lens moving mechanism;
A receiving unit for receiving an operation signal for remotely operating the zoom lens driving unit;
A control unit that generates a control signal for controlling the zoom lens driving unit based on the operation signal, and
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
A lens apparatus comprising: a switch for controlling an operating power supplied to the control unit, wherein the switch is controlled in conjunction with the switching unit . A lens device for a surveillance camera having a focus lens moving mechanism for moving a focus lens group,
A focus lens driving unit that moves the focus lens group in the optical axis direction via the focus lens moving mechanism;
A receiving unit for receiving an operation signal for remotely operating the focus lens driving unit;
A control unit for generating a control signal for controlling the focus lens driving unit based on the operation signal,
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
A lens apparatus comprising: a switch for controlling an operating power supplied to the control unit, wherein the switch is controlled in conjunction with the switching unit .   A switching means control section for controlling the switching means; and a control switch for controlling the switching means so that the operation signal can be received or cannot be received via the switching means control section. The lens apparatus according to claim 1, wherein the lens apparatus is provided.   The lens apparatus according to claim 4, wherein a control signal for controlling the switching unit is generated based on the operation signal so that the operation signal cannot be received. A lens system comprising a lens device for a surveillance camera having a variable power lens moving mechanism for moving a variable power lens group and a focus lens moving mechanism for moving a focus lens group,
A zoom lens driving unit that moves the zoom lens group in the optical axis direction via the zoom lens moving mechanism, and a focus lens drive that moves the focus lens group in the optical axis direction via the focus lens moving mechanism A lens unit, and
A receiving unit for receiving an operation signal for remotely operating the zoom lens driving unit and the focus lens driving unit;
A control unit that generates a control signal for controlling the zoom lens driving unit and the focus lens driving unit based on the operation signal, and
The receiving unit is provided with switching means for switching to a state where the operation signal can be received or disabled by blocking the operation signal ,
A lens system comprising a switch for controlling an operating power supplied to the control unit, wherein the switch is controlled in conjunction with the switching means .

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