JPH0112078Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention allows selection of the rotating position of the camera mounting plate and the extending direction of the operating rod by operating a single knob. Regarding the camera head (IPC: F16M).

(Prior Art) A pan head equipped with a fixing mechanism using a hollow shaft and a truncated conical bridge member fitted into the hollow shaft has been known (see Japanese Utility Model Application Publication No. 174756/1983). on the other hand,
Furthermore, as an operating rod for operating a pan head, there is also known one that extends diagonally backward with respect to the pan head, and is adjustable in the direction of its bending (Jikkosho). 58-19433).

(Problems to be Solved) However, even if such conventional techniques are combined, each knob must be operated separately when adjusting them, which makes the operation complicated, and also reduces manufacturing costs. The above was also considered to have drawbacks such as an unnecessary increase in the number of parts and an increase in cost.

(Structure of the invention) The present invention solves the problems simply by combining the conventional techniques, has good operability, and
The purpose of this is to provide a new pan head with a simple structure, that is, the pan head main body and the pan head that can be freely rotated from a horizontal position to a vertical position around a rotation center set on the main body. A camera mounting plate pivotally mounted to the main body, and a rotation center fixed to either the pan head main body or the camera mounting plate and rotatably mounted to the other. In a pan head comprising a hollow shaft and an operating rod having one end attached to the pan head main body and the other end bent in a dogleg shape with respect to the one end and extending diagonally backward, the hollow shaft is provided with a notch at its distal end that allows the apparent outer diameter of the distal end to be expanded by a predetermined length from the end of the hollow shaft, and the notches are spaced at predetermined intervals in the circumferential direction and A plurality of operating rods are arranged parallel to the axis of the hollow shaft, and the one end of the operating rod passes through the hollow hole of the hollow shaft, and the one end is interposed between this and the hollow shaft. The bridge member is attached to the hollow shaft via a bridge member, that is, the bridge member has a substantially truncated conical shape and is slidably engaged with the operating rod, and the bridge member is attached to the operating rod. The apparent outer diameter of the tip is expanded by the truncated conical slope when the piece is pushed from the open end of the hollow hole toward the back of the hollow shaft by means of a threaded screw means. A contact surface between the member and the screw means and a contact surface between the bridge member and the hollow shaft are respectively formed with corresponding unevenness that restricts their relative rotation, and further,
A compression spring is interposed between the bridge member and the screw means. Next, the present invention will be explained in detail according to examples.

(Embodiment) In the illustrated embodiment, reference numeral 1 denotes a pan head body fixed on a tripod (not shown), and a camera mounted on the top surface of the pan head body, which rotates from the horizontal direction to the vertical direction with respect to the pan head body. A placing plate 2 is pivotally mounted. That is, 3 is a hollow shaft that pivots the camera mounting plate to the pan head body in a hinge-like manner, the central portion 3a of which is fixed to the pan head body side, and the tip portion 3b continuous to the left and right of the central portion. , 3c are rotatably fitted with bearings on the camera mounting plate side. A plurality of axial notches 4 are provided at equal intervals in the circumferential direction at the tip of the hollow shaft 3, and the tip has a split shape so that the diameter of the tip can be enlarged. . One end 5a of the operating rod 5 is inserted into the hollow hole of the hollow shaft,
The other end 5b of the operating rod extends diagonally rearward with respect to the one end. That is, a pair of truncated conical pieces 6 and 7 are fitted to one end of the operating rod 5 so as to sandwich the bearing portion of the camera mounting plate 2 so as to be slidable in the axial direction. Conical slopes 6a and 7a abut against the inner slope of the open end of the hollow hole. A screw means is provided on the outside of the pair of bridge members, and includes a fixing member 9 integrated with the operating rod and a screw member 8 that moves forward and backward in the axial direction with respect to the operating rod. By rotating the members and moving them relatively forward, the distance between the pair of bridge members can be narrowed. Further, the bridge member is provided with a protrusion 10 that engages with the notch 4 of the hollow shaft, and the protrusion 10 restricts relative rotation of the bridge member with respect to the hollow shaft. Furthermore, corresponding radial grooves 11 and 12 are formed on the abutment surface of the fixed member 9 and the corresponding piece member 6, allowing selection of the extending direction of the operating rod. A compression coil spring 13 is interposed between the corresponding bridge member and acts in a direction to separate the corresponding contact surfaces thereof.

Therefore, when the screw member 8 is tightened,
Due to the action of the screw member constituting the screw means and the fixing member 9 of the operating rod, the pair of bridge members 6 and 7 move relatively forward in a direction in which the distance between them becomes narrower. As a result, the corresponding contact surfaces formed by the radial grooves of the fixed member 9 and the corresponding bridge member 6 are brought into close contact with each other against the force of the compression coil spring 13 acting in the direction of separating them. The extending direction of the operating rod is specified, and then each piece member expands both open ends of the hollow shaft 3 with its slope, so that the camera mounting plate 2 is also fixed with respect to the hollow shaft. The camera mounting plate 2 is fixed to the pan head main body 1 together with the operating rod at any rotational position. On the other hand, when the screw member 8 is loosened, the bridge members 6 and 7 relatively retreat outward, and the expanded diameter of both opening ends of the hollow shaft 3 returns a little due to its elasticity. The fixation of the camera mounting plate 2 is released. but,
Even in this state, the compression coil spring 1 is attached to the bridge member 6.
Since the compressive force of 3 is acting, an appropriate rotational load is still applied to the camera mounting plate 2,
This prevents an accident in which the camera mounting plate suddenly falls over in an unstable rotating position where the camera is fixed, causing damage to the camera or lens. When the screw member 8 is further loosened, the engagement relationship between the bridge member 6 and the fixed member 9 at the contact surfaces is released by the action of the compression spring, so that the operating rod 5 can also rotate with respect to the pan head main body 1. become.

By the way, although the above-mentioned embodiment has a structure in which the camera mounting plate is supported at both ends of the camera platform body, it is also possible to adopt a structure in which it is supported only at one side. Needless to say, in such a case, only one piece member is required.

(Effects of the invention) Since the present invention is configured as described above, the extending direction of the operating rod with respect to the pan head body and the rotating position of the camera mounting plate with respect to the pan head body, that is, the vertical or To provide a pan head with improved operability and a simple configuration with a small number of parts at a low cost, in which the lateral position can be easily adjusted by operating one screw means.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the pan head according to the present invention, and FIG. 2 is an exploded perspective view of the main parts thereof. 1... Pan head main body, 2... Camera mounting plate, 3...
Hollow shaft, 4...notch, 5...operating rod, 6,7...
...Block member, 8...Screw member.

Claims (1)

[Scope of Claim for Utility Model Registration] A pan head body, a camera mounting plate pivotally attached to the pan head body so as to be rotatable from a horizontal position to a vertical position around a rotation center set on the pan head body; , a hollow shaft as the rotation center fixed to either the pan head body or the camera mounting plate and rotatably attached to the other; one end portion being attached to the pan head body; and an operation rod whose other end is bent in a dogleg shape with respect to the one end and extends diagonally rearward, the hollow shaft having a predetermined distance from the end of the hollow shaft at its tip. a plurality of notches arranged at predetermined intervals in the circumferential direction and parallel to the axis of the hollow shaft; The one end of the operating rod passes through the hollow hole of the hollow shaft, and the one end is connected to the hollow shaft via at least one bridge member interposed between the one end and the hollow shaft. In other words, the bridge member has a substantially truncated conical shape and is slidably engaged with the operating rod, and the bridge member is inserted into the hollow hole by screw means provided on the operating rod. When pushed from the opening end of the hole toward the back of the hollow shaft, the apparent outer diameter of the tip is expanded by its truncated conical slope, and the contact surface between the bridge member and the screw means and a contact surface between the bridge member and the hollow shaft is formed with corresponding unevenness to restrict relative rotation thereof, and further, a gap between the bridge member and the screw means is formed. A camera mounting plate fixing mechanism characterized in that a compression spring is interposed in the camera mounting plate.