JPH05897Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an improvement in the mounting structure of an electronic viewfinder for a video camera.

(Prior Art) Conventionally, most electronic viewfinders are attached to the video camera body in a fixed position, and only the eyepiece is rotatable 90 degrees to the left or right so that the shooting angle can be selected.

However, since the viewfinder itself is only in a fixed position, the eyepiece of the viewfinder remains largely protruding from the camera body even when not in use, making it bulky and requiring a large amount of storage space in a case, etc. There was also the risk of the eyepiece getting wet or being damaged by hitting it against other objects. Also,
Some cameras allow you to remove the viewfinder from the camera body, but they have the drawback of being cumbersome to handle. Further, in the conventional configuration described above, since the direction of the eyepiece can be selected, the eyepiece may not always be located at an appropriate position for the operator.

(Purpose of the invention) This invention allows the electronic viewfinder to be housed within one side of the camera body with a simple operation, allowing it to be stored in a compact state that is easy to handle, and the entire viewfinder can be freely slid and adjusted relative to the camera body. The purpose is to provide a finder mounting structure that can be used.

(Objective of the invention) In order to achieve the above object, the invention has the following configuration.

The mounting structure of the electronic viewfinder for a video camera of the present invention is such that it is mounted on the top of the video camera body 1.
The electronic viewfinder 2 is rotatably attached within a predetermined angle range, and at one limit position of the range, the eyepiece 3 of the electronic viewfinder 2 is in a usage position protruding laterally from the top surface of the video camera body 1; On the other hand, at the limit position, the entire electronic viewfinder 2 is changed to a retracted position within the upper surface of the video camera body 1, and in the use position, the sideward protrusion dimension is slidably adjusted. It includes a finder mounting member 4, a shaft portion 5 for mounting the finder, a connecting plate 6, a thrust biasing spring 10, and a pair of cam plates 13 and 14, and the finder mounting member 4 is used for a video camera. The shaft portion 5 is attached to the main body 1, and the shaft portion 5 is provided to protrude from the upper surface of the finder mounting member 4, and has a substantially oval-shaped portion 5a in plan view at the upper shaft end, and a connecting plate. 6 is electronic view finder 2
The oval-shaped portion 5 of the shaft portion 5 is attached to the
The cam plates 13 and 14 are arranged between the finder mounting member 4 and the connecting plate 6. They are rotatably inserted and supported by the shaft portion 5 in a vertically overlapping state, and the overlapping thickness of the shaft portion 5 in the axial direction can be increased or decreased by relative rotation within a predetermined angular range around the shaft portion 5. The thrust biasing spring 10 is fixedly attached to the insertion end of the shaft 5 and biases the pair of cam plates 13, 14 and the connecting plate 6 on the shaft 5 toward the finder mounting member 4. In addition, when the cam plates 13 and 14 are rotated relative to each other to reduce the overlapping thickness, the thrust biasing spring 1
By reducing the thrust urging force of 0, rotation and sliding movements of the connecting plate 6 with respect to the shaft portion 5 are allowed, and the attitude of the electronic viewfinder 2 can be changed, while the cam plates 13 and 1
4 relative to each other to increase the overlapping thickness, the thrust biasing force of the thrust biasing spring 10 is increased, thereby restricting the rotation and sliding movement of the connecting plate 6 with respect to the shaft portion 5, and the electronic viewfinder It is characterized in that it has a configuration that makes it impossible to change the posture in step 2.

(Example) A video camera to which the present invention is applied is shown in FIG. It is configured to be able to rotate approximately 90 degrees between a protruding position and a retracted position in which the camera body 1 is completely housed within the upper surface of the camera body 1. In addition, video camera body 1 and viewfinder 2
It is connected with a cord not shown in the diagram.

Hereinafter, the mounting structure of the finder 2 will be explained in detail based on FIGS. 2 to 4.

In the figure, reference numeral 4 denotes a plate-shaped viewfinder attachment member that is connected and fixed to the top surface of the video camera body 1 by screwing or fitting, and a shaft portion 5 for attaching the viewfinder protrudes from the central outer surface of this plate-like viewfinder attachment member. It is set up. The left and right sides of the tip side of this shaft portion 5 are cut out in parallel to form oval shaped portions 5a. 6 is a connecting plate that is connected and fixed to the side of the finder 2 with screws 7;
It is attached so as to cover the recess 8 formed on the side surface. This connecting plate 6 is formed with a hole 9 through which the oval portion 5a is rotatably inserted, and a pair of holes are formed on the inner edge of the hole 9 to limit the rotation range of the shaft portion 5a to about 90 degrees. Projections 9a, 9a are provided diagonally. This hole 9 also has a long slide hole 9b with the same width as the oval-shaped portion 5a.
are installed in succession.

Reference numeral 10 denotes a spring washer that is fitted onto the insertion end of the oval-shaped portion 5a, and is prevented from coming off by a screw 11 with a spring receiving seat attached to the tip of the shaft portion 5a. A thrust force is applied to the connecting plate 6 toward the shaft portion 5 side.

13 and 14 are the mounting member 4 and the connecting plate 6
A pair of cam plates are fitted onto the shaft portion 5 between the cam plate 1 on the mounting member 4 side.
3 is the protrusion 15 and finder 2 that will be connected from now on
The cam plate 14 is integrated into the finder 2 by engagement with a vertically elongated engagement recess 16 formed on the bottom surface of the cam plate 14, while the other cam plate 14 is rotatable around the shaft 5.

Three sets of uneven cam surfaces S1 and S2 are formed along the circumferential direction on the opposing surfaces of both cam plates 13 and 14, and the rotating cam plate 14 is rotated using a lever 17 connected thereto. As a result, as shown in FIG. 5, the cam surfaces S1 and S2 bite into each other and the overlapping thickness of both cam plates 13 and 14 in the axial direction becomes small, and the cam surfaces S1 and S2 overlap each other. The cam plates 13 and 14 are configured so that their thicknesses are increased or decreased as the axial thicknesses of both cam plates 13 and 14 become larger.

The rotation range of the rotary cam plate 14 is determined by a stopper 1 protruding from the outer periphery of the cam plate 14.
8 and the contact surfaces 19a and 19b at both ends of the arc-shaped engagement recess 19 formed in the fixed cam plate 13, and at the limits of both rotations, the states shown in Fig. 5 A and B are brought about. ing.
Further, a pair of upper and lower hemispherical small protrusions 20, 20 are provided on the outer surface of the mounting member 4, and the protrusions 20, 20 are provided on the outer surface of the fixed side cam plate 13.
Two pairs of recesses 21, 21 that fit into the recesses 20 are provided with rotational phases shifted by approximately 90 degrees.

The finder mounting structure according to the present invention is constructed as described above, and when the lever 17 is swung to the left position (unlocked position) as shown by the imaginary line in FIG. plate 1
3 and 14 have a smaller thickness as shown in FIGS. 3 and 5A, and the thrust force exerted on the connecting plate 6 by the spring washer 10 becomes weaker. In this state, the engagement urging force between the small protrusion 20 and the recess 21 is weak, so by applying rotational force around the shaft portion 5 to the finder 2, the finder 2 and the cam plate 1
3 and 14 can rotate with relatively little resistance while being displaced slightly in thrust against the spring 10 as they get over the small protrusion 20, and the finder 2 can be changed from the use position to the storage position or vice versa. Posture can be changed. Incidentally, the relationship between the oval-shaped portion 5a and the insertion hole 9 in each posture is as shown in FIGS. 7A and 7B.

When set in either of the two positions, the small protrusions 20, 20 and the recesses 21, 21 are positioned and fitted, and the lever 17 is moved to the right position (locked position) shown in FIG. When the cam plates 13 and 14 are rocked, their thickness increases as shown in FIGS. The fitting biasing force acts strongly. In this state, the cam plate 13 is attached to the mounting member 4.
This locks the finder 2.

Further, in the unlocked state shown in FIG. 3, the sliding friction resistance of the connecting plate 6 is small, and the finder 2 can be easily slid left and right while remaining in the protruding position. By operating the lever 17 from an arbitrary slide position to the lock position B, the spring washer 10 is greatly deformed as described above, thereby increasing the clamping force of the connecting plate 6 between the cam plate 14 and the flat washer 12. Then, sliding frictional resistance strongly acts on the connecting plate 6, causing the connecting plate 6 to
is fixed.

Incidentally, instead of the spring washer 10, a spring made of a coil spring or a rubber ring may be used, and these are collectively referred to as a thrust biasing spring. It is also possible to attach a friction plate to the sliding surface between the finder mounting member 4 and the fixed cam plate 13 to stably maintain the attitude of the finder 2 by frictional resistance.

(Effects of the invention) As described above, according to the invention, by simply rotating the cam plate, the biasing force of the thrust biasing spring can be increased or decreased with a single touch, thereby controlling the rotation and sliding movement of the finder as well as its locking. This makes it possible to easily and quickly switch the finder between the protruding usage position and the compact retracted position without the need for troublesome operations such as screw operations, and also allows the operator to set the finder position suitable for the operator. It became.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the video camera to which the present invention is applied, Fig. 2 is an exploded perspective view of the main parts of the viewfinder mounting structure, Fig. 3 is a cross-sectional plan view of the main parts in the unlocked state, and Fig. 4 5 is a cross-sectional plan view of the main part in the locked state, and FIGS. 5A and 5B are developed views showing the operation of the cam plate, where A shows the unlocked state and B shows the locked state. Fig. 6 is a schematic side view of the main part, and Fig. 7 A, B, and C are plan views showing the relationship between the shaft part and the connecting plate. indicates the state of use in the protruding position. 1 is a video camera body, 2 is an electronic view finder, 4 is a finder mounting member, 5 is a shaft for attaching the finder, 5a is an oval part, 6 is a connecting plate, 9 is a hole, 9a is a protrusion, 9b is for a slide A long hole, 10 is a thrust biasing spring, and 13 and 14 are cam plates.

Claims (1)

[Claims for Utility Model Registration] An electronic viewfinder 2 is attached to the upper part of the video camera body 1 so as to be rotatable within a predetermined angle range, and at one extreme position of the range, the eyepiece 3 of the electronic viewfinder 2 is attached. Video camera body 1
At the other limit position, the electronic viewfinder 2 is changed into a retracted position where the entire electronic viewfinder 2 is housed within the upper surface of the video camera body 1. It has a structure in which the protruding dimension in the direction is slidably adjusted, and includes a finder mounting member 4, a shaft portion 5 for mounting the finder, a connecting plate 6, a thrust biasing spring 10, and a set of cam plates 13, 14. The viewfinder attachment member 4 is attached to the video camera body 1, and the shaft portion 5 is provided to protrude from the upper surface of the viewfinder attachment member 4, and the upper shaft end has a substantially oval shape in plan view. The connecting plate 6 has a shaped portion 5a, and the connecting plate 6 is connected to the electronic view finder 2.
The oval-shaped portion 5 of the shaft portion 5 is attached to the
The cam plates 13 and 14 are arranged between the finder mounting member 4 and the connecting plate 6. They are rotatably inserted and supported by the shaft portion 5 in a vertically overlapping state, and the overlapping thickness of the shaft portion 5 in the axial direction can be increased or decreased by relative rotation within a predetermined angular range around the shaft portion 5. The thrust biasing spring 10 is fixedly attached to the insertion end of the shaft 5 and biases the pair of cam plates 13, 14 and the connecting plate 6 on the shaft 5 toward the finder mounting member 4. In addition, when the cam plates 13 and 14 are rotated relative to each other to reduce the overlapping thickness, the thrust biasing spring 1
By reducing the thrust urging force of 0, rotation and sliding movements of the connecting plate 6 with respect to the shaft portion 5 are allowed, and the attitude of the electronic viewfinder 2 can be changed, while the cam plates 13 and 1
4 relative to each other to increase the overlapping thickness, the thrust biasing force of the thrust biasing spring 10 is increased, thereby restricting the rotation and sliding movement of the connecting plate 6 with respect to the shaft portion 5, and the electronic viewfinder 2. A mounting structure for an electronic viewfinder for a video camera, characterized in that it has a configuration that makes it impossible to change the posture.