JP4604289B2 - Extender operation device - Google Patents

Description

  The present invention relates to an extender operating device, and more particularly, to an extender operating device that changes a photographing magnification by moving a zoom lens electrically or manually in a light path of a photographing lens system for a television camera.

  The ENG camera is used for news gathering, etc., and needs to be able to cope with the operability and mobility of the photographer, and the lens used for such a camera is also the same.

  As an ENG camera lens, a lens device incorporating an extender has an extender unit connected to the rear end of the lens device, and this extender unit has a variable power lens at the afocal part of the relay lens part of the photographing lens system. It is structured to move forward and backward.

  In the manual type extender unit that manually moves the zoom lens forward and backward, the extender unit is provided with a switching lever. When the switch lever is operated by a cameraman operating the ENG camera on the shoulder, the zoom lens is moved back and forth to switch the photographing magnification.

In addition, there is also known a device in which an external extender operating device is attached so that a switching lever of a manual type extender unit can be remotely operated (Patent Document 1).
JP-A-4-240810

  However, in the case of Patent Document 1, since it is premised on a shooting situation in which an extender switching operation is performed manually, the extender unit does not have a built-in motor, and an extender with a built-in motor is used for remote operation. It was necessary to attach the operating device externally.

  In addition, when a shooting situation in which the extender switching operation is remotely performed by electric drive is assumed, it is known that a motor is built in the extender unit from the beginning.

  However, in that case, it was only possible to switch the extender by electric drive, and it was not possible to switch manually. In this case, in order to enable manual switching, it is conceivable to provide a switching member between electric and manual. However, the photographer must operate the switching member each time depending on the shooting situation. Has the disadvantage of becoming complicated.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an extender operating device that can switch between manual operation and electric operation and that can perform a switching operation smoothly.

In order to achieve the above object, the present invention provides a magnifying lens that is provided in a photographic lens device and that is movable forward and backward with respect to the optical path of the photographic lens system, and electrically moves the magnifying lens forward and backward. A motor, a manual operation member that manually moves the zoom lens forward and backward, a remote operation member that remotely operates the motor, and a power that moves the zoom lens forward and backward moves to the motor side or the manual operation member side. together with switches, wherein the remote operation member is attached switches the power to the motor side, a power switching means for switching the power to the remote operation member is removed to the manual operating member side, Ri Tona, wherein the power switch A means for detecting attachment / detachment of the remote operation member; and when the sensor detects attachment of the remote operation member, A clutch that switches the power to the manual operation member when the sensor detects removal of the remote operation member, and the clutch includes a manual / electrical switching motor; and The one-way rotation of the manual / electrical switching motor causes the clutch gear on the motor side to mesh with the gear on the zoom lens side via the gear on the manual operation member side, and the manual / electrical switching motor And a switching ring that retracts the clutch gear on the motor side from the gear on the manual operation member side by rotation in the other direction .

The extender operating device of the present invention includes a motor and a manual operation member, and when the remote operation member is attached to the power switching means, the power for moving the zoom lens forward and backward is switched to the motor side by the power switching means. The zoom lens can be remotely operated by the remote operation member. When the remote operation member is removed from the power transmission means, the power for moving the zoom lens forward / backward is switched to the manual operation member side by the power switching means, so that the zoom lens can be manually operated by the manual operation member. At this time, since the operation member is removed from the lens device, the operation member does not interfere with the operation. Therefore, according to the present invention, it is possible to provide an extender operating device that can switch between manual operation and electric operation and that can perform a switching operation smoothly.

The power switching means of the present invention includes a sensor for detecting attachment / detachment of the remote operation member, and when the sensor detects attachment of the remote operation member, the power is switched to the motor side, and the sensor And a clutch that switches the power to the manual operation member when the removal of the remote operation member is detected.

According to the present invention , when the sensor detects the attachment of the remote operation member, the clutch switches the power to the motor side, and when the sensor detects the removal of the operation member, the clutch switches the power to the manual operation member side.
The remote operation member of the present invention is preferably a zoom demand that is detachably connected to the extender operation device via a cable.

  As described above, according to the extender operating device according to the present invention, the motor and the manual operation member are provided, and when the remote operation member is attached to the power switching means, the power for moving the zoom lens forward and backward is moved by the power switching means. When the remote control member is removed from the power transmission means, the power for moving the zoom lens forward and backward is switched to the manual operation member side by the power switching means, so that manual and electric can be switched. It is possible to provide an extender operating device that can perform a switching operation smoothly.

  A preferred embodiment of an extender operating device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view of an ENG camera lens 10 provided with an extender operating device according to an embodiment. The lens 10 for the ENG camera is provided with a focus ring, a zoom ring, and an iris ring in a rotatable manner on a lens barrel, focusing is performed by rotating the focus ring, and zooming is performed by rotating the zoom ring. Then, the iris is driven by rotating the iris ring to set the desired F value.

  A drive unit 12 is attached to the side of the ENG camera lens 10. A zoom seesaw lever 14 is provided on the upper surface of the drive unit 12. By operating the zoom seesaw lever 14, a zoom motor built in the drive unit 12 is driven, and the zoom ring is electrically rotated. Reference numeral 16 denotes a power supply cable for connecting the ENG camera lens 10 and a camera (not shown), and the zoom motor or the like is driven by the power supplied from the camera via the power supply cable 16. Is done.

  An extender unit 18 is provided in the vicinity of the rear end of the ENG camera lens 10. The casing 20 of the extender unit 18 incorporates a variable power lens for switching the photographing magnification to two times. The variable power lens is provided on the afocal portion of the relay lens portion of the ENG camera lens 10 so as to be movable back and forth. ing. Thereby, the photographing magnification can be instantaneously switched from 1 × to 2 × and from 2 × to 1 ×.

  Further, a lever (manual operation member) 22 for manually moving the zoom lens forward and backward is provided on the side surface of the casing 20 on the camera side so as to be rotatable. Further, an extender motor 24 that electrically moves the zoom lens forward and backward is built in the casing 20.

  Furthermore, the extender operating device has an operating member (remote operating member) 26 for remotely operating the extender motor 24. The operation member 26 is a zoom demand attached to, for example, a pan bar (not shown) extended from a pan head (not shown), and a changeover switch 28 for switching the photographing magnification to the zoom demand as described above is provided. It has been.

  The operation member 26 is detachably connected to a connector (not shown) of the extender unit 18 via a connector 32 connected to the cable 30. The extender unit 18 is provided with a sensor 34 for detecting that the connector 32 is connected to the connector on the extender unit 18 side by a short circuit or the like as shown in FIG. Further, the extender unit 18 incorporates a CPU 36 that drives and controls the extender motor 24 and the like based on signals from the changeover switch 28 and the sensor 34. The CPU 36 will be described later.

  FIGS. 3 and 4 are structural diagrams of a power switching device (power switching means) 40 for switching the advancing / retreating operation of the variable power lens between electric and manual.

  In the power switching device 40 shown in the figure, a manual mechanism for moving the lens holding frame 42 holding the zoom lens by a manual operation of the lever 22 back and forth in the optical path of the photographing lens system will be described.

  As shown in FIG. 3, a gear 44 is fixed to the end of the lever 22, and the gear 44 is engaged with a gear 46. The gear 46 is rotatably provided on a shaft 50 whose end is fixed to a plate 48 provided in the casing 20, and the lens holding frame 42 is fixed to a cylindrical portion 52 formed integrally with the gear 46. Has been. Therefore, according to this manual mechanism, when the lever 22 is rotated, the operating force is transmitted from the gear 44 to the gear 46, and the lens holding frame 42 rotates about the shaft 50, so that the lens holding frame 42 is rotated. Is moved back and forth with respect to the optical path of the taking lens system.

  Next, in the power switching device 40, an electric mechanism for moving the lens holding frame 42 back and forth in the optical path of the photographing lens system by the power of the extender motor 24, that is, by the remote operation of the operation member 26 shown in FIG. .

  As shown in FIG. 4, a gear 56 is fixed to the rotating shaft 54 of the extender motor 24, and the gear 56 is engaged with a gear 58 having longer teeth. The gear 58 is rotatably provided on a shaft 60 whose end is fixed to the plate 48, and a clutch gear 62 formed integrally with the gear 58 is engaged with the gear 44. Therefore, according to this electric mechanism, when the extender motor 24 is driven, the power is transmitted from the gear 56 to the gear 46 via the gear 58, the clutch gear 62 and the gear 44. As a result, like the manual mechanism described above, the lens holding frame 42 rotates about the shaft 50, so that the lens holding frame 42 is moved back and forth with respect to the optical path of the photographing lens system.

  Next, a clutch mechanism for switching the power transmission system between the manual mechanism shown in FIG. 3 and the electric mechanism shown in FIG. 4 will be described.

  The clutch mechanism includes a manual / electric switching motor 64, and a screw shaft 68 is coaxially fixed to a rotating shaft 66 of the manual / electric switching motor 64. The screw shaft 68 is provided in the vicinity of the gear 58 and the clutch gear 62 and is provided in parallel to the shaft 60. Further, a switching ring 70 is screwed onto the screw shaft 68, and the switching ring 70 is slidably supported by a guide bar 72 provided in parallel to the screw shaft 68. Therefore, the switching ring 70 is reciprocated along the screw shaft 68 by driving the manual / electrical switching motor 64 to rotate forward / reversely.

  When the switching ring 70 is moved to the left as shown in FIG. 3, the switching ring 70 comes into contact with the side surface of the gear 58, and the gear 58 is pushed by the switching ring 70 by the continued leftward movement of the switching ring 70. Slide to the left along 60. As a result, the clutch gear 62 formed integrally with the gear 58 is retracted from the gear 44, so that the power of the electric mechanism is cut off, so that only the operation of the lever 22 is effective.

  When the switching ring 70 is moved to the right as shown in FIG. 4, the switching ring 70 contacts the side surface of the clutch gear 60, and the clutch gear 62 is moved to the switching ring 70 by the continued right movement of the switching ring 70. Pushed and slides right along the axis 60. As a result, the clutch gear 62 is engaged with the gear 44, so that the power of the electric mechanism is transmitted to the lens holding frame 42. At this time, the operation of the lever 22 is also effective. However, when the current is applied to the extender motor 24, the lever 22 cannot be operated by the locking action of the extender motor 24. Only remote operation by the member 26 is effective.

  When the signal indicating that the connector 32 (see FIG. 1) is attached is output from the sensor 34, the CPU 36 shown in FIG. 2 controls the motor drive 74 to correct the manual / electric switching motor 64. Roll drive. As a result, the switching ring 70 is moved to the right as shown in FIG. 4, and the clutch gear 62 is engaged with the gear 44, so that only the remote operation by the operation member 26 of FIG. 1 is effective. Then, when a switching signal is output from the changeover switch 28 of the operation member 26, the CPU 36 controls the motor drive 76 to drive the extender motor 24. As a result, the photographing magnification can be electrically switched between 1 × and 2 ×.

  Further, when a signal indicating that the connector 32 (see FIG. 1) has been removed is output from the sensor 34, the CPU 36 controls the motor drive 74 to drive the manual / electric switching motor 64 in reverse. As a result, the switching ring 70 is moved to the left as shown in FIG. 3 and the clutch gear 62 is retracted from the gear 44, so that only manual operation by the lever 22 is effective.

  As described above, according to the extender operating device of the embodiment, when the extender motor 24 and the manual lever 22 are provided and the remote operation member 26 is attached to the extender unit 18, the zoom lens is moved forward and backward. Since the power to be moved is switched to the extender motor 24 side, the zoom lens can be remotely operated by the operation member 26.

  When the connector 32 of the operation member 26 is removed from the extender unit 18, the power for moving the zoom lens forward / backward is switched to the lever 22 side, so that the zoom lens can be manually operated by the lever 22. At this time, since the operation member 26 is detached from the ENG camera lens 10, the operation member 26 and the cable 30 do not interfere with the operation. Therefore, it is possible to provide an extender operating device that can switch between manual operation and electric operation and that can perform the switching operation smoothly.

The perspective view of the television camera to which the extender operation device of the embodiment is applied The block diagram which showed the structure of the extender operating device shown in FIG. Structure diagram when manual side is effectively switched by power switching device Structure diagram when the electric side is effectively switched by the power switching device

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... ENG camera lens, 12 ... Drive unit, 18 ... Extender unit, 20 ... Casing, 22 ... Lever, 24 ... Extender motor, 26 ... Operation member, 28 ... Changeover switch, 30 ... Cable, 32 ... Connector, 34 ... Sensor, 36 ... CPU, 40 ... Power switching device, 42 ... Lens holding frame, 64 ... Manual / electrical switching motor, 70 ... Switching ring

Claims (2)

A variable power lens provided in the photographic lens device and movably moved back and forth with respect to the optical path of the photographic lens system;
A motor that electrically moves the zoom lens forward and backward, and
A manual operation member for manually moving the zoom lens forward and backward, and
A remote operation member for remotely operating the motor;
The power for moving the zoom lens forward / backward is switched to the motor side or the manual operation member side, the power is switched to the motor side when the remote operation member is attached, and the power is switched to when the remote operation member is removed. a power switching means for switching to the manual operation member side, Ri Tona,
The power switching means is
A sensor for detecting attachment and removal of the remote control member;
A clutch that switches the power to the motor side when the sensor detects attachment of the remote operation member, and switches the power to the manual operation member side when the sensor detects removal of the remote operation member. And comprising
The clutch is
A manual / electrical switching motor;
One-way rotation of the manual / electrical switching motor causes the clutch gear on the motor side to mesh with the gear on the variable magnification lens side via the gear on the manual operation member side, and the manual / electrical switching motor An extender operating device comprising: a switching ring that retracts the clutch gear on the motor side from the gear on the manual operating member side by rotating in the other direction . The extender operating device according to claim 1, wherein the remote control member is a zoom demand that is detachably connected to the extender operating device via a cable .

Images