JP3390959B2 - Head 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 pan head device, and more particularly to a pan head in which a pair of arms for rotatably supporting a tilt shaft of a TV camera, a monitor TV or the like is erected on a swivel base. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, a pan head device of this type is a casting or the like, and includes a swivel base mounted on the top of a tripod and a pair of tilt shafts of a TV camera, a monitor TV, etc., which are rotatably supported by both ends. The arm and the one are made in one.

[0003]

However, in the conventional pan head device, since the swivel base and the pair of arms are integrally formed, the pan head device corresponding to the size of the TV camera or the monitor TV. There is a drawback that the types must be prepared. The present invention has been made in view of the above circumstances, and an object thereof is to provide a pan head device capable of coping with TV cameras and monitor TVs of different sizes.

[0004]

In order to achieve the above-mentioned object, the present invention enables a swivel base and a tilt shaft of a TV camera or a monitor TV, which is installed upright on the swivel base, to be freely rotatable with both ends. In a pan head device including a pair of supporting arm members, the pair of arm members are slidably provided on the swivel base so that a space between the pair of arm members can be expanded or contracted. It has a feature.

[0005]

The feature of the present invention resides in that the pair of arm members are slidably provided on the swivel base so that the interval between the pair of arm members can be expanded or contracted. That is, when mounting a large TV camera or monitor TV on the pan head device, it is sufficient to widen the space between the pair of arm members, and when mounting a small TV camera or monitor TV on the pan head device. May reduce the distance between the pair of arm members.

As a result, a single pan head device can handle television cameras and monitor televisions of different sizes. The distance between the pair of arm members can be adjusted by operating a drive mechanism provided on the swivel base.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a tripod head device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a front view showing a case in which a tripod head device 10 according to the present invention supports a prompter 12. The platform device 10 is configured by a pair of arms 16 and 18 standing parallel to each other on a swivel base 14 formed in a long shape. A monitor TV 20 of the prompter 12 is arranged between the arms 16 and 18 with a screen 22 facing upward, and the tilt shafts 24, 24 of the monitor TV 20 are arranged.
Is rotatably supported by the arms 16 and 18 with both ends. A half mirror 26 of the prompter 12 is provided at a predetermined angle above the screen 22 of the monitor TV 20, and a television camera (not shown) is arranged behind the half mirror 26.

The pair of arms 16 and 18 are shown in FIGS.
As shown in FIG. 2, the groove 2 formed in the longitudinal direction of the swivel base 14
8 is arranged so as to be slidable in the left-right direction in the figure. Further, the arms 16 and 18 slide by driving an expansion / contraction mechanism 30 described later. Thereby, the distance L between the arms 16 and 18 is adjusted. The expansion / contraction mechanism 30 includes a gear box 32, feed screws 34, 3
6 and nuts 38 and 40.

The gear box 32 is fixed to the central portion of the swivel base 14 in the longitudinal direction, and the base ends of the feed screws 34 and 36 are connected to both ends of the gear box 32 so as to be able to transmit a rotational force. Further, the gear box 32 is connected to a rotary shaft 42 that gives a rotational force to the gear box 32. The rotational force of the rotary shaft 42 is the gear box 30.
When transmitted to the feed screws 32, 34 via the, the feed screws 32, 34 can rotate in the same direction. The feed screw 32 is a reverse screw to the feed screw 34.

On the other hand, a pair of nuts 38, 38 are screwed onto the tip of the feed screw 34. This nut 38, 38
Is fixed to the lower side surface 16A of the arm 16. In addition, a pair of nuts 4 is attached to the tip of the feed screw 36.
0 and 40 are screwed together, and the nuts 40 and 40 are fixed to the lower side surface 18A of the arm 18. Next, the operation of the tripod platform device 10 configured as described above will be described.

First, before the monitor television 20 is attached to the platform device 10, the distance L between the arms 16 and 18 is adjusted by the expansion / contraction mechanism 30 so that the distance L corresponds to the size of the monitor television 20. When the gear box 32 of the expansion / contraction mechanism 30 is driven by the rotating shaft 42, the nut 3
The rotation of the feed screws 34 and 36 at 8 and 40 causes the arms 16 and 18 to move away from each other or to approach each other around the gear box 32, that is, around the center of the swivel base 14. To do. In this way, the distance L between the arms 16 and 18 is set to the monitor television 2
After adjusting to the interval corresponding to the size of 0, the tilt shafts 24, 24 of the monitor TV 20 are supported by the arms 16, 18.

FIG. 4 shows an embodiment in which a monitor television 50 smaller than the monitor television 20 shown in FIG. According to the figure, the monitor television 50
After the space L between the arms 16 and 18 is narrowed by the expansion / contraction mechanism 30 so as to correspond to the size of
The tilt shafts 52, 52 are supported on the 18. The half mirror 54 is also small in size according to the size of the monitor television 50.

Thus, in this embodiment, the arms 16,
Since 18 is arranged on the swivel base 14 so as to be slidable,
Even the monitor televisions 20 and 50 having different sizes can be handled by the single pan head device 10. The rotary shaft 4
2 may be rotated manually or by a motor.

Further, in the present embodiment, the pan head device 10 applied to the prompter 12 has been described, but the present invention is not limited to this and may be applied as a pan head device for a television camera. Further, in this embodiment, the arms 16 and 18 are slid by the expansion / contraction mechanism 30, but the present invention is not limited to this, and the arms 16 and 18 are manually slid and then fixed by screwing or the like. You may use it.

[0015]

As described above, according to the platform device of the present invention, the pair of arm members are provided slidably on the swivel base so that the distance between the pair of arm members can be expanded or contracted. A single pan head device can be used for different TV cameras and monitor TVs.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment in which a tripod head device according to the present invention is applied to a prompter.

FIG. 2 is a view taken along the line AA in FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is a front view in which a small monitor TV is attached to the platform device according to the present invention.

[Explanation of symbols]

10 ... Platform device 12 ... Prompter 14 ... Revolving base 16, 18 ... Arm 20, 50 ... Monitor TV 24, 52 ... Tilt axis 26, 54 ... Half mirror 30 ... Expansion / contraction mechanism 32 ... Gear box 34, 36 ... Lead screw 38, 40 ... Nuts 42 ... Rotating axis

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Claims (2)

(57) [Claims] 1. A pan / tilt head device comprising a swivel base and a pair of arm members which are erected on the swivel base and rotatably support a tilt shaft of a television camera or a monitor television with both ends. The pan head device is characterized in that the pair of arm members are slidably provided on the swivel base so that a space between the pair of arm members can be expanded or contracted. 2. The pan / tilt head device according to claim 1, wherein the swivel base is provided with a drive mechanism for slidingly driving the pair of arm members.