JP2817805B2 - TV camera lens extender operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TV camera lens extender operating device, and more particularly to a TV camera lens extender operating device for inserting or retracting a variable power lens on the optical axis of a TV camera shooting lens system. .

[0002]

2. Description of the Related Art Television cameras, especially ENG (electric, news, gathering) cameras, are mainly used for news gathering, sports gathering, sports broadcasting, drama gathering, etc., and can respond to the operability and mobility of photographers. Is necessary, as are the lenses used in such cameras.

As a lens for such an ENG camera,
There is a zoom lens with a built-in extender. As shown in FIG. 5, the ENG camera lens including the extender has an extender unit 10 connected to the rear end side of the ENG camera lens 12. The mechanism of the extender unit 10 has a structure in which a variable power lens can be inserted into and retracted from the afocal portion of the relay lens unit of the photographing lens system.

[0004] The switching between the insertion and retraction of the variable power lens is manually performed by a cameraman by a manual switching lever 14 attached to the outside of the extender unit 10.

[0005]

However, the above E
As described above, NG cameras are used for news coverage, sports coverage, sports broadcasting, drama collection, etc.
There is a case where only the camera is moved to a high place by a crane device or the like to take an image. Therefore, in such a case, there is a disadvantage that the cameraman cannot quickly switch the variable power lens.

The present invention has been made in view of such circumstances, and has as its object to provide an extender operating device for a lens for a television camera that can operate the extender from a position away from the television camera.

[0007]

According to the present invention, in order to achieve the above object, a gear is engraved on a manual switching lever for inserting or retracting a variable power lens on the optical axis of a photographic lens system for a television camera. A driving means, which is provided with a gear that meshes with the gear of the manual switching lever, is configured to be able to remotely control the gear, is detachably connected to the manual switching lever, and remotely controls the driving means to operate the manual switching lever. Is operated to switch the variable power lens.

[0008]

According to the present invention, the gear engraved on the drive means of the extender operating device is detachably connected to the gear engraved on the manual switching lever of the extender unit. When switching the variable power lens of the extender unit, the driving means is driven by remote control to rotate the manual switching lever. Thereby, the variable power lens of the extender unit can be switched from a position away from the television camera.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a television camera lens extender operating device according to the present invention. FIG. 1 shows an embodiment in which an extender operating device for a television camera lens according to the present invention is attached to an ENG camera lens, and the same or similar members as those in the conventional example shown in FIG. 5 are the same. The description is given with reference numerals.

As shown in FIG. 1, an extender operating device 16 is connected to the extender unit 10 of the lens for the ENG camera 12. In addition, the ENG camera 1
The two-purpose lens has a remotely controllable electric zoom mechanism 18,
An electric focus mechanism and an aperture control mechanism (not shown) are connected. The extender operating device 16 is ENG
The main body of the camera lens 12 is detachably provided by a bolt 20 shown in FIG. The gear transmission mechanism 22 is installed inside the extender operation device 16.

As shown in FIGS. 2 to 4, the gear transmission mechanism 22 has a drive gear 24 fixed to a rotating shaft 30 of a drive motor 28 as shown in FIG. The gear 26 is engaged with a gear 34 of the manual switching lever 14 via coaxial gears 27 and 29. The gear 34 is formed integrally with the manual switching lever 14. Thus, the rotational driving force of the driving motor 28 is transmitted to the manual switching lever 14 via the driving gear 24 → the intermediate gear 26 → the gear 27 → the gear 29 → the gear 34. Therefore, the manual switching lever 14 can rotate in the direction of the arrow in the figure by appropriately driving the drive motor 28 in both the left and right directions.

In the rotation range of the lever 14, limit switches 38 and 39 are provided.
8 and 39 stop the drive motor 28 when the lever 14 comes into contact with the limit switch. Further, a cable 44 is connected to the drive motor 28 as shown in FIG. 1, and a manual remote control unit 46 for controlling the rotation direction and the number of rotations of the drive motor 28 is connected to the end of the cable 44. I have.

Next, the operation of the extender operating device for a television camera configured as described above will be described. First, the extender operating device 16 is connected to the ENG camera 12.
When mounted on the extender operating device 16, the gears 34 and 29 of the manual switching lever 14 mesh with each other.
Is attached to the ENG camera lens 12 using the bolt 20. Thus, the mounting of the extender operation device 16 is completed.

Next, the ENG camera lens 12 is mounted on a camera moving device, and only the ENG camera lens 12 is moved to start photographing. In order to move the variable power lens built in the extender unit 10 on the optical axis according to the shooting situation, the cameraman manually operates the remote control unit 46 and the cable 44.
A signal for inserting the variable power lens is transmitted to the drive motor 28 via the. When the drive motor 28 receives the signal, the drive motor 28 drives the drive gear 24, the intermediate gear 26, the gear 2
7, the gear 3 of the manual switching lever 14 via the gear 29
4 is rotated clockwise to rotate the manual switching lever 14. When the manual switching lever 14 rotates to the position where the variable power lens is inserted, the switch 38 outputs a drive stop signal to the drive motor 28 via the cable 36. As a result, the drive motor 28 stops, and the insertion of the variable power lens ends.

Next, when retracting the variable power lens from the optical axis, a remote control unit 46 is remotely operated and a signal for retracting the variable power lens is transmitted to the drive motor 28 via the cable 44. When the drive motor 28 receives the signal, the drive motor 28 rotates so as to rotate the manual switching lever 14 by 75 ° counterclockwise from the position shown by the dashed line in FIG. That is, the manual switching lever 14 returns to the original position. Thus, the retraction of the variable power lens is completed.

As described above, in the present embodiment, since the drive mechanism 22 of the extender operation device 16 that can be remotely operated is detachably connected to the gear 34 of the manual switching lever 14, even when only the camera is moved for photographing, The extenders can be switched appropriately. Further, in this embodiment, the extender operating device can be easily mounted on the lens for the ENG camera.

[0017]

As described above, according to the TV camera lens extender operating device of the present invention, a gear is engraved on the manual switching lever of the variable power lens, and the gear of the driving means of the extender device is mounted on this gear. Is detachably connected,
Since the drive means is driven by remote control to switch the variable power lens, the variable power lens of the extender unit can be appropriately switched from a position away from the television camera.

Further, the extender operating device can be mounted without significant modification.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment in which an extender operating device for a television camera lens according to the present invention is attached to an ENG camera lens.

FIG. 2 is a front view of FIG.

FIG. 3 is an explanatory view showing an embodiment of a drive mechanism of the extender operating device of the lens for a television camera according to the present invention.

FIG. 4 is a sectional view taken along the line AA in FIG. 3;

FIG. 5 is a perspective view showing an embodiment of a conventional lens for an ENG camera.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Extender unit 12 ... Lens for ENG camera 14 ... Manual switching lever 16 ... Extender operating device 20 ... Bolt 22 ... Drive mechanism 24, 26, 27, 29, 34 ... Gear 28 ... Drive motor 38 ... Switch 46 ... Remote control unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 7/14 G02B 7/28 G03B 17/12 H04N 5/225

Claims (1)

(57) [Claims] A gear is provided on a manual switching lever for inserting or retracting a variable power lens on an optical axis of a photographing lens system for a television camera, and a gear meshing with the gear of the manual switching lever is provided. Driving means configured to be remotely operable is detachably connected to the manual switching lever, and the variable magnification lens is switched by operating the manual switching lever by remotely operating the driving means. A TV camera extender operating device.