JPS6348870Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a pan head for movie cameras, video cameras, and other cameras equipped with a mechanism for widely adjusting rotation or rotational resistance around the vertical and horizontal axes. .

(Purpose of the invention) In general, in pan heads for movie cameras, etc.
In order to be able to pan and/or tilt smoothly, the resistance value during rotation or rotation around the vertical and/or horizontal axis should be as constant as possible without sudden changes during the movement. It is desirable that it be maintained as is. The present invention uses such a pan head,
During rotation or pivoting movements around the vertical and/or horizontal axes,
The resistance value is constant without changing much, and the cameraman can
It is an object of the present invention to provide a rotation or rotation resistance adjustment mechanism for a pan head that allows a desired resistance value to be easily selected according to other conditions.

(Structure of the invention) In other words, the present invention includes a connecting member 3 in which the center lines of both the vertical axis and the horizontal axis are set, and the connecting member 3 that rotates or rotates about either the vertical or horizontal center line as a rotation center. A camera side member 5 rotatably mounted;
In a pan head comprising tripod side members 1 and 2 which are rotatably or rotatably pivoted to the connecting member about the center line of the other, the one of the tripod side members relative to the connecting member of the camera side member. integrally engages with the connecting member against relative rotation or rotation about the center line of the body, and slidably engages with the connecting member against movement of the center line in the axial direction. A connecting member side ring 7 made of synthetic resin with a small friction coefficient and having a protrusion 9 that contacts the tripod side member on one side, and one side on the other side of the connecting member side ring are coaxially rotatable. the other side is slidable with respect to the axial movement of the center line and integrally engages with the camera side member with respect to the relative rotation or rotation, and the other side has a Protrusion 10 that comes into contact with the pressing means
A pressing force is applied to the connecting member through a camera-side member ring 8 having It is characterized by comprising pressing means 14 that exerts pressure on the abutting surfaces between the side ring and the camera side member ring, as well as the abutting surfaces between the protrusion 9 of the connecting member side ring and the tripod side member 2.
Hereinafter, the present invention will be explained in detail according to the illustrated embodiments.

(Example) Reference numeral 1 denotes a vertical shaft base to be fixed to a tripod (not shown), in the center of which a vertical shaft 2 made of metal is integrally erected, and on the vertical shaft, a connecting member 3 is rotated. They fit together freely. A rotation center line 4 is set in the connecting member as a center line of a horizontal axis perpendicular to the vertical axis,
The connecting member is provided with a camera mounting table 5 that rotates around the rotation center line, sandwiching it from both sides of the connecting member.
The two forked portions of the two are rotatably fitted together. That is, the connecting member is integrally formed with a guide cylindrical part 6 whose center line is the rotation center line, and a guide cylinder part 6 is connected to the outer surface of the guide cylinder part so as to be slidable in the axial direction of the center line. A member-side ring 7 is fitted, and a camera member-side ring 8 is abutted and fitted into the connecting member-side ring so as to be freely rotatable about the center line. by the way,
At least the former of the connecting member side ring and camera member side ring is made of a synthetic resin with low frictional resistance such as polyacetal, and on the other hand, the contact surfaces of both are filled with high viscosity grease, Protrusions 9 and 10 are provided on opposite sides of the contact surface, respectively. The tip of the protrusion 9 of the connecting member side ring passes through the corresponding through hole 11 of the connecting member and comes into contact with the side surface of the vertical shaft 2, while the tip of the protrusion 10 of the camera member side ring passes through the corresponding through hole 11 of the connecting member. It passes through a corresponding through hole 13 provided in one side plate 12 of the mounting table 5. Therefore, with respect to the relative rotation around the center line, the connecting member side ring 7 rotates together with the connecting member, and the camera member side ring 8 rotates together with the camera mounting base 5, so that the contact surfaces of both rings become sliding surfaces. It is becoming. Reference numeral 14 denotes an adjustment handle screwed onto the side plate 12 of the camera mounting table, and the adjustment handle abuts the tip of the protrusion 10 of the camera member side ring 8 on its back surface. Therefore, by rotating the adjustment handle and pressing the protrusion 10, the vertical axis 2 is
can be pressed indirectly. Therefore, if the adjustment handle is rotated in the forward direction, the rotational or rotational resistance about the longitudinal and transverse axes will increase, and if it is rotated in the opposite direction, it will decrease. Incidentally, reference numerals 15 and 16 are fixed operation knobs for tilting and panning, respectively, which are fixed so as not to move at their respective positions.

(Effect of the invention) Since the present invention is constructed as described above, a desired constant rotational or/rotational resistance can be obtained when rotating or/rotating around the vertical axis and/or the horizontal axis.
In addition, the selectable range is wide and the operation is easy, and the rotation around the vertical and horizontal axes and/or rotational resistance can be adjusted at once by operating the pressing means according to the shooting conditions. This has the effect that panning and/or tilting operations of the camera can be performed smoothly.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a pan head according to the present invention, and FIG. 2 is an exploded view of the same. 2... Vertical axis, 3... Connecting member, 5... Camera mounting stand, 7... Connecting member side ring, 8... Camera member side ring, 14... Adjustment handle.

Claims (1)

[Claims for Utility Model Registration] A connecting member 3 in which center lines of both the vertical and horizontal axes are set, and the connecting member is rotatable or rotatable about either the vertical or horizontal center line as a rotation center. A camera-side member 5 pivotally attached to the camera-side member 5; and tripod-side members 1 and 2 pivotably attached to the connecting member so as to be rotatable or rotatable about the center line of the other one. , integrally engages with the connecting member against relative rotation or rotation about the one center line of the camera side member with respect to the connecting member, and resists movement in the axial direction of the center line. A protrusion 9 that slidably engages with the connecting member and abuts the tripod side member on one side.
A connecting member side ring 7 made of a synthetic resin with a small coefficient of friction and having one side rotatably engages with the other side of the connecting member side ring on the same axis, and the other side is in contact with and engages with the other side of the connecting member side ring so as to be rotatable on the same axis, and the other side is oriented in the axial direction of the center line. A camera-side member ring 8 that is slidable in response to movement, integrally engages with the camera-side member in response to the relative rotation or rotation, and is provided with a protrusion 10 on the other side that abuts a pressing means described below. , high viscosity grease interposed between the contact surfaces of the connecting member side ring and the camera side member side ring, and applying a pressing force to the connecting member side ring and the camera side member ring through the protrusion 10 of the camera side member. A rotation or rotational resistance adjustment mechanism for a pan head, characterized in that it comprises a contact surface of the connecting member side ring and a pressing means 14 that acts on the contact surface of the connecting member side ring and the tripod side member 2.