JP2008164815A - Lens device and lens system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens device capable of freely switching adjustment of a viewing angle and/or focus by remote control to an enabled/disabled state, and a lens system equipped with the lens device. <P>SOLUTION: The lens device 100 equipped with a zoom moving mechanism 30 moving a zoom group and a focus moving mechanism 40 moving a focus group is equipped with: a zoom drive section 10 that moves the zoom group in an optical axis direction through the zoom moving mechanism; a focus drive section 20 that moves the focus group in the optical axis direction through the focus moving mechanism; a receiving section 60 that receives an operation signal for remote-controlling the zoom drive section and the focus drive section; a control section 80 that generates a control signal for controlling the zoom drive section and the focus drive section based on the operation signal; and switching means 70, 70a; 72, 72a to 72c that are connected to the control section and manually changed over to switch the control of the zoom drive section and the focus drive section through the control section to an enabled or disabled state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lens apparatus and a lens system, and more specifically, a lens apparatus including a variable power lens moving mechanism that moves a variable power lens group and / or a focus lens moving mechanism that moves a focus 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 fixed focus lens and a zoom 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.

  SUMMARY OF THE INVENTION 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 between a state in which the angle of view and / or the focus can be adjusted by remote control. And providing a lens system including the lens device.

  In order to solve the above problems, according to a first aspect of the present invention, there is provided a variable power lens moving mechanism for moving a variable power lens group and a lens apparatus including a focal lens moving mechanism for moving a focal lens group. . The lens apparatus includes a variable power lens driving unit that moves the variable power lens group in the optical axis direction via the variable power lens moving mechanism, and a focus lens that moves the focus lens group in the optical axis direction via the focus lens moving mechanism. A control unit for controlling the drive unit, a zoom lens drive unit and a focus lens drive unit, and a control unit for controlling the zoom lens drive unit and the focus lens drive unit as operation signals. And a switching unit that is connected to the control unit and manually switches the variable power lens driving unit and the focus lens driving unit via the control unit to enable or disable control.

  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, there is a switching means to manually switch the remote operation to a possible / impossible state, allowing remote operation only at the time of installation and impossible at the time of monitoring. There is no fear that the adjusted angle of view and focus are easily changed.

  According to the second aspect of the present invention, there is provided a lens apparatus including a variable power lens moving mechanism for moving the variable power lens group. The lens apparatus includes a variable power lens driving unit that moves the variable power lens group in the optical axis direction via a variable power lens moving mechanism, and a receiving unit that receives an operation signal for remotely operating the variable power lens driving unit. A control unit that generates a control signal for controlling the zoom lens driving unit based on the operation signal; and a control unit that is connected to the control unit and that enables or disables the control of the zoom lens driving unit via the control unit. Switching means for manually switching.

  According to such a configuration, the switching means for manually switching to a state where the remote operation of the variable power lens group is enabled / disabled is provided, and 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 due to the erroneous operation of the criminals or the criminal acts of obstruction.

  Moreover, according to the 3rd viewpoint of this invention, a lens apparatus provided with the focus lens moving mechanism which moves a focus lens group is provided. The lens apparatus includes a focus lens driving unit that moves the focus lens group in the optical axis direction via a focus lens moving mechanism, a receiving unit that receives an operation signal for remotely operating the focus lens driving unit, and a focus lens driving unit. A control unit that generates a control signal for controlling the control unit based on the operation signal, and a switching unit that is connected to the control unit and manually switches the focus lens driving unit via the control unit to enable or disable control. .

  According to such a configuration, the switching means for manually switching the focus lens group to a state where the remote operation of the focus lens group is enabled / disabled is provided, and 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 due to erroneous operation or criminal obstruction.

  The switching means may be arranged close to a lens barrel that includes at least one of a variable power lens moving mechanism and a focal lens moving mechanism. According to such a configuration, since the switching unit is arranged in the vicinity of the lens barrel, when the adjusted angle of view and / or focus is changed during monitoring, the switching state of the switching unit is photographed. Therefore, the effect which suppresses the obstruction act of a criminal can be expected.

  A switch for controlling the operating power supplied to the control unit may be switched by a switching unit. According to such a configuration, since the operating power supplied to the control unit is controlled via the switching unit, it is possible to manually switch to a state where remote operation via the control unit is possible / impossible.

  You may make it have a counter which controls the operating power supplied to the said control part according to a predetermined count value. According to such a configuration, since the operating power supplied to the control unit is controlled via the counter, the remote operation via the control unit can be automatically switched to a disabled state.

  The control unit may include a controller, and a switch that controls at least one of input of an operation signal to the controller and output of a control signal from the controller may be switched by a switching unit. According to this configuration, at least one of the input of the operation signal and the output of the control signal is controlled via the switching unit, so that the remote operation via the control unit can be manually switched to an enabled / disabled state. .

  You may make it have a counter which controls at least any one of the input of the operation signal to the said controller, and the output of the control signal from a controller according to a predetermined | prescribed count value. According to such a configuration, since at least one of the input of the operation signal and the output of the control signal is controlled via the counter, the remote operation via the control unit can be automatically switched to a disabled state.

  You may make it have the counter adjustment part which can adjust the said predetermined count value arbitrarily. According to such a configuration, since a desired counter value can be set, it is possible to adjust the time during which remote operation can be performed according to the difficulty level of the installation work.

  Furthermore, according to the fourth aspect of the present invention, there is provided a lens system including a variable power lens moving mechanism that moves the variable power lens group and a lens device that has a focus lens moving mechanism that moves the focus lens group. In this lens system, the lens device includes a variable power lens driving unit that moves the variable power lens group in the optical axis direction via the variable power lens moving mechanism, and a focal lens group in the optical axis direction via the focus lens moving mechanism. A focusing lens driving unit to be moved; and a switching unit. The lens system includes a receiving unit that receives an operation signal for remotely operating the zoom lens driving unit and the focus lens driving unit, and a control signal for controlling the zoom lens driving unit and the focus lens driving unit. And a control unit that generates based on the above. The switching unit is connected to the control unit and can be manually switched to a state where the control of the variable power lens driving unit and the focus lens driving unit via the control unit is enabled or disabled.

  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. Surveillance cameras 200 and 200 ′ have a dome-like appearance, and include a base 202, a dome 204, a camera body mounted on the base 202 inside the dome 204, and lenses 100 and 100 ′ mounted on the camera body. Have. 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 ( "Corresponding to a" focus lens driving unit "), and control units 80 and 80 '(not shown) for controlling the zoom and focus driving units 10 and 20.

  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 “focus lens movement mechanism”), and an aperture adjustment mechanism provided between the two movement mechanisms. And a receiving unit 60 that receives an operation signal for remote operation. 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. The cam grooves 37 and 47 may be provided, and the 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 54 having an opening / closing unit (not shown) for adjusting the aperture, and a drive unit that drives the aperture frame 54. 52 or the like. In the aperture adjustment mechanism 50, the aperture drive unit 52 is controlled by a control signal output via a cable 56 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 54 is automatically adjusted.

  On the rear side of the fixed cylinder 31, a mounting frame 62 for mounting the lens body on a camera body or the like in a replaceable manner is provided. The mounting frame 62 is formed in a substantially cylindrical shape and includes an annular mounting portion 64 at the rear end. The mounting portion 64 has a screw portion 66 formed on the outer peripheral surface, and is engaged with a screw portion formed in 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 unit will be described. In addition, since both the drive parts 10 and 20 are provided 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 lens apparatus according to the present invention will be described. The receiving unit 60 receives a remote operation signal transmitted from a remote control device or the like, such as infrared rays or weak radio waves. In the case of a dome type surveillance camera, necessary measures such as selection of the material and structure of the dome 204 are taken so that the input of the operation signal to the receiving unit 60 is not blocked by the dome 204.

  Next, a control unit that controls the zoom and focus driving unit of the lens apparatus according to the present invention will be described. FIG. 4 is a block diagram schematically showing the configuration of the control unit according to the first embodiment of the present invention.

  As shown in FIG. 4, 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 control unit 90, and operates the controller 82, the motor drive units 86a and 86b, and the like by operating power supplied from an external power source 210 such as a camera via the power 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.

  For example, as shown in FIG. 2A, the control unit 80 is provided on the back side of the mounting unit 18 of the zoom and focus driving units 10 and 20, and is used together with a changeover switch 70 or 72 arranged in the vicinity of the lens barrel. The switch comprises a switch for switching to a state where remote operation is possible or impossible. That is, by manually switching the changeover switch 70 or 72, the switch of the control unit 80 is electrically opened and closed.

  Here, the switch is provided in the power control unit 90 and is configured as a first switch 70a that cuts off the operating power supplied from the power control unit 90 to at least one of the controller 82 and the motor drive units 86a and 86b. The switch may be configured as second switches 72a to 72c that block at least one of an operation signal passing through the reception control unit 88 and a drive signal passing through the motor control units 84a and 84b.

  4 shows a case where the changeover switch 70 or 72 and the first or second switch 70a, 72a to 72b are directly connected, the changeover switch 70 or 72 and the first or second switch 70a, 72 a to 72 b may be connected via the controller 82.

  Further, FIG. 4 shows the lens 100 having the switching means of the changeover switch 72 and the second switches 72a to 72c as well as the switching means of the changeover switch 70 and the first switch 70a. In this case, the changeover switch 70 and the changeover switch 72 may be provided as the same changeover switch. However, although both switching means may be included as components, a case where either switching means is included will be described below.

  FIG. 4 shows a configuration in which the changeover switch 72 is connected to the motor control units 84a and 84b and the reception control unit 88 to open and close the first switches 72a and 72b and the first switch 72c. However, the changeover switch 72 may have a configuration that opens or closes one of the first switches 72a and 72b or the first switch 72c.

  Hereinafter, the installation procedure of the surveillance camera provided with the varifocus lens according to the present embodiment will be described. At the time of installation, the changeover switch 70 or 72 is manually turned on in a state where the monitoring camera 200 is installed on the ceiling or wall surface of the store and the optical axis P of the lens 100 is set in a predetermined direction. 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 changeover switch 70 or 72 is turned ON, the switch of the control unit 80 is closed.

  Here, if the changeover switch 70 is provided, the operation power can be supplied to the controller 82 and the motor drive units 86a and 86b by closing the first switch 70a. Further, if the changeover switch 72 is provided, the second switches 72a to 72c are closed, whereby the operation signal is input to the controller 82 and / or the drive signals are output from the motor control units 84a and 84b. Is possible. 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 provided in the lens body. 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 operation signal input via the receiving unit 60 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 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 input 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 activated, so that 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 changeover switch 70 or 72 is manually turned off. In the case of a dome type surveillance camera, the dome 204 is removed before the changeover switch 70 or 72 is switched, and the dome 204 is attached again after the switching. When the changeover switch 70 or 72 is turned OFF, the switch of the control unit 80 is opened.

  Here, if the changeover switch 70 is provided, the supply of the operating power to the controller 82 and the motor drive units 86a and 86b is cut off by opening the first switch 70a. Further, if the changeover switch 72 is provided, the operation of the operation signals to the controller 82 and / or the output of the drive signals from the motor control units 84a and 84b can be performed by opening the second switches 72a to 72c. Blocked. Thereby, the remote operation of the angle of view and the focus by the operation signal is disabled.

  When the first switch 70a is opened, 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. On the other hand, when the second switches 72a to 72c are opened, the operation signal and the drive signal are cut off, but the power supply from the external power source 210 to the control unit 80 is maintained.

  When the angle of view and the focus are adjusted again after the installation is completed, the changeover switch 70 or 72 is manually turned on, 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 switching for manual switching of the changeover switch 70 or 72.

  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. Further, switching means 70 and 70a or 72 and 72a to 72c for manually switching the remote operation to a possible / impossible state are provided, so that the remote operation can be performed only at the time of installation and disabled at the time of monitoring. Therefore, there is no possibility that the adjusted angle of view and focus are easily changed due to an erroneous operation during monitoring or an act of obstructing a criminal.

  Further, since the switching means 70 and 70a, or 72 and 72a to 72c arranged close to the lens barrel are provided, if the adjusted angle of view and focus are to be changed during monitoring, the switching means 70 or 72 The switching situation is photographed. Therefore, the effect which suppresses the obstruction act of a criminal can be expected.

  In addition, since at least one of the input of the operation signal and the output of the control signal or the operation power supplied to the control unit 80 is controlled via the switching means 70 and 72a, or 72 and 72a to 72c, the control unit 80 It is possible to manually switch the remote control via the device to the enabled / disabled state.

  FIG. 5 is a block diagram schematically showing the configuration of the control unit according to the second embodiment 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 in the first embodiment is omitted.

  As shown in FIG. 5, the control unit 80 ′ according to the present embodiment constitutes a switching unit together with a reset switch 74 or 76 disposed in the vicinity of the lens barrel instead of the changeover switch 70 or 72. A switch is provided to switch the remote operation to a possible or impossible state. That is, by manually operating the reset switch 74 or 76, the switch of the control unit 80 'is electrically closed.

  Here, the switch is provided in the power supply control unit 90 and is configured as a first switch 74a that cuts off the operating power supplied from the power supply control unit 90 to at least one of the controller 82 and the motor drive units 86a and 86b. The switch may be configured as second switches 76a to 76c that block at least one of an operation signal passing through the reception control unit 88 and a drive signal passing through the motor control units 84a and 84b.

  5 shows a case where the reset switch 74 or 76 and the first or second switch 74a, 76a to 76b are directly connected, the reset switch 74 or 76 and the first or second switch 74a, 76a to 76b may be connected via a controller 82 '.

  Further, FIG. 5 shows a lens 100 ′ including switching means for the reset switch 74 and the second switches 74 a to 74 c as well as switching means for the reset switch 74 and the first switch 74 a. In this case, the reset switch 74 and the reset switch 76 may be provided as the same reset switch. However, although both switching means may be included as components, a case where either switching means is included will be described below.

  FIG. 5 shows a configuration in which the reset switch 74 is connected to the motor control units 84a and 84b and the reception control unit 88 to open and close the first switches 74a and 74b and the first switch 74c. However, the reset switch 74 may have a configuration that opens or closes one of the first switches 74a and 74b or the first switch 74c.

  In addition, the controller 82 'of the control unit 80' incorporates a counter 78 for measuring a predetermined time. The counter 78 may be provided as another component connected to the controller 82 ′ instead of being built in the controller 82 ′. The counter 78 is linked to the first or second switch 74a, 76a to 76c, and starts counting when the switch is closed, and operates to open the switch when the count value reaches a predetermined value. To do. Here, a predetermined count value required from closing to opening of the first or second switch 74a, 76a to 76c is set as a fixed value.

  On the other hand, the control unit 82 ′ may include a count adjustment unit 79 a that can arbitrarily adjust a predetermined count value. In this case, the control unit 80 'includes, for example, an adjustment dial 79, a dip switch, and the like, and includes a count adjustment unit 79a that arbitrarily adjusts a predetermined count value set in advance in the counter. That is, by adjusting the adjustment dial 79 or the like, the time from closing to opening of the first or second switch 74a or 76a to 76c is arbitrarily adjusted.

  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, before the reset switch 74 or 76 is operated, a predetermined count value set in advance is arbitrarily adjusted by the adjustment dial 79 or the like as necessary. When the reset switch 74 or 76 is manually operated, the first or second switch 74a or 76a to 76c of the control unit 80 'is closed. 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.

  Here, if the reset switch 74 is provided, the operation power can be supplied to the controller 82 ′ and the motor drive units 86 a and 86 b by closing the first switch 74 a. In addition, if the reset switch 76 is provided, the second switches 76a to 76c are closed to input the operation signal to the controller 82 'and / or the drive signal from the motor control units 84a and 84b. Output is possible. As a result, it becomes possible to remotely control the angle of view and the focus by the operation signal.

  As the reset switch 74 or 76 is operated, the counter 78 starts counting. The installer adjusts the angle of view and the focus by operating the remote control device.

  On the other hand, when the count value of the counter 78 reaches a predetermined value, the first or second switch 74a or 76a to 76c linked to the counter 78 is opened. When the first or second switch 74a or 76a to 76c is opened, the angle of view and the focus cannot be remotely operated by the operation signal. In the case of a dome-type surveillance camera, the operation of the reset switch 74 or 76 corresponding to the changeover switch 70 or 72 is unnecessary, so that the dome 204 is not required to be attached or detached.

  When the angle of view and the focus are adjusted again after the installation is completed, the reset switch 74 or 76 is manually operated, 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 the operation of the reset switch 74 or 76.

  As described above, according to this embodiment, at least one of the input of the operation signal and the output of the control signal, or the operating power supplied to the control unit 80 ′ is controlled via the counter 78. The remote operation via the unit 80 ′ can be automatically switched to an impossible state. As a result, in the case of a dome-type surveillance camera, the operation of the reset switch 74 or 76 is not required after the adjustment of the angle of view and the focus, and therefore the dome 204 is not required to be attached or detached.

  In addition, since a desired counter value can be set via the counter adjustment unit 79a, it is possible to adjust the time during which remote operation can be performed according to the difficulty level of the installation work.

  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 ′ include the zoom and focus moving mechanisms 30 and 40, the zoom and focus driving units 10 and 20, the receiving unit 60, the control units 80 and 80 ′, the switching unit, and the like. Is illustrated. 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.

  In the above description, the embodiment in which the first or second switch 70a, 72a to 72c, 74a, 76a to 76c is provided in the control unit 80, 80 ′ is exemplified. The target is not limited to such a case. That is, according to the present invention, for example, the first or second switch 70 a, 72 a to 72 c, 74 a, 76 a to 76 c is between the control unit 80, 80 ′ and the reception unit 60, and the control unit 80, 80 ′ is connected to the drive unit 10. , 20, or between the control units 80, 80 ′ or the drive units 10, 20 and the external power supply 210, the same applies.

  Further, in the above description, the embodiment in the case where the varifocal lenses 100 and 100 ′ are applied to the 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 embodiment in the case where the driving force of the zoom and focus lens driving units 10 and 20 is transmitted to the zoom and focus moving mechanisms 30 and 40 via the gear mechanism is illustrated. The application target of 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.

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 block diagram which shows typically the structure of the control part which concerns on the 1st Embodiment of this invention. It is a block diagram which shows typically the structure of the control part which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Zoom drive part 20 Focus drive part 30 Zoom moving mechanism 40 Focus moving mechanism 60 Receiving part 50 Aperture adjustment mechanism 70, 72 Changeover switch 74, 76 Reset switch 70a, 74a Switch 1
72a to 72c, 76a to 76c Switch 2
78 Counter 79 Adjustment dial 79a Counter adjustment unit 80, 80 'Control unit 82, 82' Controller 84a, 84b Motor control unit 86a, 86b Motor drive unit 88 Reception control unit 90 Power control unit 100, 100 'Varifocal lens 210 External power supply

Claims (10)

A lens apparatus including a variable power lens moving mechanism for moving a variable power 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 for generating a control signal for controlling the zoom lens driving unit and the focus lens driving unit based on the operation signal;
The lens apparatus comprising: a switching unit connected to the control unit and manually switching the variable power lens driving unit and the focus lens driving unit via the control unit to enable or disable control. . A lens apparatus including 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 for generating a control signal for controlling the zoom lens driving unit based on the operation signal;
And a switching unit that is connected to the control unit and manually switches the control of the zoom lens driving unit via the control unit to a state where the control is possible or impossible. A lens device including 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 that generates a control signal for controlling the focus lens driving unit based on the operation signal;
And a switching unit that is connected to the control unit and manually switches the focus lens driving unit via the control unit to enable or disable control.   The lens according to any one of claims 1 to 3, wherein the switching means is disposed in the vicinity of a lens barrel including at least one of the variable magnification lens moving mechanism and the focus lens moving mechanism. apparatus.   The lens apparatus according to claim 1, wherein a switch for controlling an operating power supplied to the control unit is switched by the switching unit.   The lens apparatus according to claim 5, further comprising a counter that controls an operation power supplied to the control unit according to a predetermined count value.   The control unit includes a controller, and a switch that controls at least one of an input of the operation signal to the controller and an output of the control signal from the controller is switched by the switching unit. Item 7. The lens device according to any one of Items 1 to 6.   The lens apparatus according to claim 7, further comprising a counter that controls at least one of an input of the operation signal to the controller and an output of the control signal from the controller according to a predetermined count value. .   The lens apparatus according to claim 6, further comprising a counter adjustment unit that can arbitrarily adjust the predetermined count value. A lens system comprising a variable power lens moving mechanism for moving a variable power lens group and a lens device having 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; and a focus lens driving unit that moves the focus lens group in the optical axis direction via the focus lens moving mechanism; And the switching device, and the lens device,
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 switching unit is connected to the control unit, and is manually switchable to a state where the control of the zoom lens driving unit and the focus lens driving unit via the control unit is enabled or disabled. Lens system.

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