JPH0210512Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mounting device for a viewfinder in a television camera, and more particularly to a tilt mechanism for vertically rotating and tilting the viewfinder.

BACKGROUND ART AND PROBLEMS Conventionally, a viewfinder in a television camera is held by fitting a set screw 5 of a viewfinder 4 into a diagonal hole 3 of a holding plate 2 provided in a camera body 1, as shown in FIG. are doing.
When this viewfinder 4 is rotated in the vertical direction shown by arrows a and b using the set screw 5 as a fulcrum at the position shown by the solid line, the front end or the rear end of the lower part of the viewfinder 4 comes into contact with the camera body 1. For this reason, conventionally, after loosening the set screw 5, the view finder 4 is manually lifted along the diagonal hole 3 to the position shown by the dotted line. At the position shown by the dotted line, the viewfinder 4 is rotated in the directions shown by arrows a and b.

However, in the case of a large camera, the viewfinder 4 weighs 6 to 7kg, and there is no mechanism such as a spring to assist in lifting it, making it extremely difficult to lift the viewfinder 4 or return it to its original position. Further, in the conventional tilt mechanism, the rotation angle at which the tilt can be performed is approximately ±30° at most. For this reason, if the camera is placed at a low or high position, the inclination of the viewfinder will be insufficient, and the cameraman will be forced to take an unreasonable posture to compensate for this.

Purpose of the Invention In view of the above-mentioned circumstances, the present invention provides a view-finder mounting device for a television camera that allows the view-finder to be easily tilted and has a wide tiltable range.

Summary of the invention In the present invention, the lower end of the first arm is rotatably supported on the camera body, and the upper end is rotatably supported on the side of the viewfinder. An arcuate hole centered around a pivot point is provided in the side surface of the viewfinder, and the upper end of the second arm is rotatably supported on the camera body, and the upper end is rotated into the arcuate hole. This is a mounting device for a view finder which is fitted so as to be movable and movable along the arcuate hole. As a result, the viewfinder can be easily tilted and the rotation angle can be made larger than before.

Embodiment In FIG. 2, a viewfinder attachment member 6 is provided on the top surface of the camera body 1, and the viewfinder 4 is attached to this attachment member 6 via a link mechanism according to the present invention so as to be rotatable in the directions of arrows a and b. ing. The lower end of a first arm 7 is rotatably supported on the mounting member 6 by a shaft 9, and the lower end of a second arm 8, which is approximately L-shaped, is rotatably supported by a shaft 10. has been done. The upper end of the arm 7 is rotatably supported by a shaft 11 approximately at the center of the side surface of the viewfinder 4. The upper end of the arm 8 is rotatable about a shaft 12 approximately 45 degrees diagonally above the shaft 11;
In addition, an arcuate hole 13 formed in the viewfinder 4
It is pivoted so that it can move freely along. Arc hole 13
is formed in a range of approximately 120° along an arc centered on the axis 11. The upper part of the arm 7 and the bent part of the arm 8 are connected by a compression spring device 14. As shown in FIG. 6, this compression spring device 14 has a compression spring 16 housed inside a telescoping case 15 configured in three stages, and engagement holes 17 and 18 provided at both upper and lower ends. is used. A handle 19 for moving the viewfinder 4 is provided at the rear of the viewfinder 4.

Next, the operation when performing tailing with the above configuration will be explained.

In FIG. 2, the view index 4 is indicated by arrow b.
When tilting down in the direction, first hold handle 1.
9 and pull it up in the direction of arrow c. As a result, the arms 7 and 8 both rotate counterclockwise about the shafts 9 and 10, and the upper shaft 12 of the arm 8 descends through the circular arc hole 13. As a result, the view finder 4 moves in parallel in the direction of arrow c and reaches the position shown in FIG. In the state shown in FIG. 3, the shaft 12 has moved through the arcuate hole 13 approximately 90 degrees from the position shown in FIG. Due to the parallel movement 12, the view finder 4
Its bottom surface 4a is separated from the camera body 1. Therefore, in this state, if the handle 19 is rotated in the direction of the arrow d, the viewfinder 4 will be rotated in the direction of the arrow b about the shaft 11, reaching the position shown in FIG.
In the state shown in FIG. 4, the shaft 12 is at the end of the arcuate hole 13, and the viewfinder 4 has rotated to the maximum angle, tilting down approximately 40 degrees from the horizontal state shown in FIG.

In FIG. 2, when the viewfinder 4 is simply rotated in the direction of arrow b using only the shaft 11 as a fulcrum, the rotation angle is at its maximum because the bottom surface 4a or the handle 19 comes into contact with the mounting member 6 or the camera body 1. However, in the present invention, the view indexer 4 is moved away from the camera body 1 as shown in FIG. 3, and then rotated, so that the angle of rotation can be increased. In addition, view index 4
can be tilted and held at any position within the range from the position shown in FIG. 2 to the position shown in FIG. 4, and a brake mechanism for this purpose is appropriately provided.

In the above explanation, the view indexer 4 is once set to the third position.
After moving it to the position shown in the figure, it is rotated to the position shown in Figure 4, but by operating the handle 19 from the position shown in Figure 1,
By rotating the bottom surface 4a or the handle 19 so as not to contact the camera body 1 or the mounting member 6, the camera can be rotated to the position shown in FIG. 4 with one operation.

Next, when the viewfinder 4 is rotated in the direction of arrow a by operating the handle 19 from the horizontal state shown in FIG. 2, the arms 7 and 8 are both rotated counterclockwise.
At this time, since the shaft 12 is located at the upper end of the arcuate hole and is prevented from moving counterclockwise, the distance between the two shafts 11 and 12 is constrained to be constant during rotation. Therefore, the view finder 4 rotates about the shafts 11 and 12 as fulcrums, and at this time, since the movement of the shaft 12 is restricted, the view finder 4 is forced to move in a direction substantially equal to the direction of arrow c in FIG. It rotates while being moved. That is, the view finder 4 rotates while moving away from the camera body 1. and the fifth
As shown in the figure, it is possible to obtain a tail-up state of approximately 80 degrees at the maximum angle. Therefore, the view finder 4 can be tilted and held at any position within the range from the position shown in FIG. 2 to the position shown in FIG. Incidentally, if the view finder 4 is rotated about only the shaft 11 as a fulcrum, the tip of the view finder 4 will come into contact with the camera body 1 when the view finder 4 rotates approximately 30 degrees.

Next, the compression spring device 14 will be explained with reference to FIG.

The compression spring device 14 is expanded in response to the counterclockwise rotation of the arms 7 and 8 when the above-mentioned tilt-down and roll-up is performed, and its biasing force causes the operation of the handle 19 of the viewfinder 4, which is heavy. This is to assist in movement.
In this embodiment, as shown in FIG. 7, the viewfinder 4 is in a horizontal position (same position as in FIG. 2).
Let the length of the compression spring device 14 be ₁ when it is in
When the arms 7 and 8 are rotated to the maximum angle from this state, the length of the compression spring device 14 is extended to ₂ . The urging force generated by this extension facilitates the rotation of the arms 7 and 8, allowing the view finder 4 to move lightly and smoothly.

As shown in the figure, this compression spring device 14 has engagement holes 17 and 18 at both ends connected to the upper part of the arm 7 and the upper part of the arm 8.
are engaged with the bent portions of the respective parts. Compression spring device 1
4 has been confirmed to work effectively when installed in the above position. Note that the engagement hole 18 at the lower end may be engaged with the mounting member 6 or the like on the camera body 1 side.

Effects of the invention: The heavy viewfinder can be easily tilted just by operating the handle, and a larger rotation range can be obtained compared to conventional models.
This makes it easier for the photographer to operate the camera, thereby increasing the degree of freedom in shooting.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional viewfinder mounting device, and Figs. 2 to 7 show embodiments of the present invention.
Figure 2 is a side view in the horizontal state, Figure 3 is a side view showing the viewfinder moved in parallel, and Figure 4 is a side view showing the viewfinder in parallel movement.
The figure is a side view showing the tilted-down state, Fig. 5 is a side view showing the tailed-up state, Fig. 6 is a partially sectional side view of the compression spring device, and Fig. 7 is for explaining the action of the compression spring device. FIG. In addition, in the symbols used in the drawings, 1... Camera body, 4... Viewfinder, 6... Viewfinder attachment member, 7... First arm,
8... Second arm, 9, 10, 11, 12...
Axis, 13...A circular arc hole.

Claims (1)

[Scope of utility model registration request] The lower end of the first arm is rotatably supported on the camera body, and the upper end is rotatably supported on the side surface of the viewfinder. An arc-shaped hole is provided in the side surface of the viewfinder, and the upper end of the second arm is rotatably supported on the camera body, and the upper end is rotatably supported in the arc-shaped hole and the upper end of the second arm is rotatably supported on the camera body. A mounting device for a viewfinder that is fitted so as to be movable along an arc-shaped hole.