JPH0614693U - Tripod head - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a structure in which a camera mounting block can be securely fixed to a desired angle with a slight force, and is excellent in stability when fixed. [Structure] A journal bearing 2 that rotatably fits with a journal projection 7 projecting from the upper surface of a support block 6 is formed on the bottom surface, and is pivotally fixed or released by a swing pivot fastening handle 4. Camera mounting block 1 in which camera mounting means is formed at one end of the main body block 1 via a support shaft 11.
2 is pivotally attached in a vertically rotatable manner. The swinging end of the main body block 1 and the swinging end of the camera mounting block 12 are connected by a first series rod 15 and a second connecting rod 18, and the pivot portion is connected to the first fastening shaft 19 and the second fastening shaft. The gist is that the pantograph type angle adjusting mechanism 13 having a structure in which the connecting angle of the two connecting rods 15 and 18 is changed and adjusted by tightening or releasing by the screw action of 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a tripod head that is used by attaching it to a tripod for a camera, and particularly to a tripod platform that has excellent stability in changing a shooting posture.

[0002]

[Prior art]

 Conventionally, various pan heads have been used as a structure that is fixedly mounted on the top of a tripod for a camera and stably holds the camera at a predetermined angle. In general, as shown in FIG. 5, a support block 54 is fixed by a bolt 53 to a platform receiver 52 which is formed at the top end of an elevating rod 51 protruding from a tripod base 50, and the support block 54 is fixed. A camera mounting block 56 is rotatably mounted vertically on a support shaft 55 horizontally installed on the top end of 54, and a handle 57 projecting from the camera mounting block 56 swings (arrow A). At the same time as the angle is adjusted, the rotation of the support shaft 55 is fastened by turning (arrow B) to fix the support shaft 55 at a desired angle.

[0003]

[Problems to be solved by the device]

 However, in the platform having the above structure, when the handle 57 is loosened, the camera mounting block 56 easily rotates around the support shaft 55 as a center of rotation, especially for a large camera such as a subloid plate or a telephoto lens having a long focal length. When attaching a heavy-duty camera that has been attached, since the moment around the support shaft 55 is large and stability cannot be ensured, it is necessary to strongly tighten the handle 57 (arrow B), and only a large force is required. In addition, there was a problem that the screw thread of the fastening portion was destroyed.

The present invention has been made in view of the above problems, and a new structure that can surely tilt and fix a camera mounting block at an arbitrary angle with a small force and that is excellent in stability at the time of fixing. The purpose is to provide a tripod platform.

[0005]

Means for Solving the Problems A tripod platform according to the present invention comprises a support block having screw fixing means for fixing the tripod platform receiver on a bottom surface, and a journal projection protruding from an upper surface of the support block. A journal bearing that is rotatably fitted to the journal bearing is formed on the bottom surface, and the slit formed on the journal bearing is expanded and contracted by the bolt portion of the fastening shaft that is configured on the swinging and swiveling fastening handle to be fixed or released by rotation. The main body block to be configured, a camera mounting block that is pivotally attached to one end of the main body block so as to be rotatable in the vertical direction through a support shaft that is horizontally installed, and has a camera mounting means on the upper surface, and the main body. One end of the first series of rods is rotatably pivoted to the end of the block, and one end of the second connecting rod is pivotally attached to the bearing protrusion protruding from the end of the camera mounting block via the first fastening shaft. Freely pivoted At the same time, the other end of each connecting rod is connected by the second fastening shaft, and the pivoting part is tightened or released by the screw action of the first fastening shaft and the second fastening shaft to change the connecting angle of both connecting rods. The gist is that it is composed of a pantograph type angle adjusting mechanism having a structure for changing and adjusting. In addition, it is preferable that a plurality of the first series rods and the second connecting rods of the pantograph type angle adjusting mechanism are alternately laminated and connected at the connecting and pivoting ends of both members.

[0006]

[Action]

 In the above configuration, the swivel and the adjustment of the elevation angle are performed by expanding and contracting the slit with the swing swivel fastening handle, and tightening or releasing the fitting between the journal bearing and the journal projection. The vertical rotation displacement of the camera mounting block is performed by rotating the first fastening shaft and the second fastening shaft of the pantograph type angle adjusting mechanism. If the screws of the first fastening shaft and the second fastening shaft are loosened during this vertical angular displacement, the sliding frictional force at the pivot joints of the first and second connecting rods will decrease, and the two components that make up the pantograph will be reduced. The connection angle of the rod is freely adjustable, and the camera mounting block rotates the camera with the support shaft as the center of rotation and the camera as the vertical plane of rotation.

[0007]

【Example】

 An embodiment of a tripod platform according to the present invention will be described below with reference to FIGS. Reference numeral 1 is a main body block of the platform, and a hemispherical journal bearing 2 formed at the central axis CL position on the bottom surface of the main body block 1 is formed with a slot 3 extending in the radial direction, and A bolt portion 5 of a fastening shaft that constitutes a swing turning fastening handle 4 is screwed between opposite end portions, and the slit 3 is expanded and contracted. Into the journal bearing 2, a spherical journal projection 7 projecting at the central axis position on the upper surface side of the disk-shaped support block 6 is rotatably fitted, and is pivotally attached by a holding plate 8 so as not to prevent the rotation. It becomes. A tripod mounting female screw 9 is screwed on the center axis of the support block 6 on the bottom surface side, and a detent screw 10 that moves forward and backward toward the bottom surface is screwed into the support block 6.

Above the body block 1, one end of a rectangular plate-shaped camera mounting block 12 is rotatably pivoted in the vertical direction (arrow C) via a support shaft 11 that is horizontally installed at one end of the body block 1. The main body block 1 and the swing end of the camera mounting block 12 are connected to each other via a pantograph type angle adjusting mechanism 13. The pan tag rough type angle adjusting mechanism 13 is rotatably pivotally attached at one end thereof to a bearing projection 14 projecting at an end of the main body block 1 through a pin shaft 16 to a plurality of first series rods 15, 15. At the same time, one end of each of the plurality of second connecting rods 18, 18, ... Is pivotally attached to the bearing protrusion 17 protruding from the end portion of the camera mounting block 12 via the first fastening shaft 19, and both connecting rods 15 are connected. , 18 are connected to each other by a second fastening shaft 20. Further, in the present embodiment, the first series of rods 15, 15 ... And the second connecting rods 18, 18 ... Are constituted by a combination of two sheets on each side, a total of four sheets. The rotation knobs 21 and 22 are fixed to the ends of the two fastening shafts 20, respectively, and a spacer 23 is inserted between the two connecting rods 15 and 15 of the second fastening shaft 20 to fix both rotation knobs 21 and 22 is rotated to tighten or release the first fastening shaft 19 and the second fastening shaft 20 to change and adjust the connecting angle of the two connecting rods 15 and 18.

In addition, a dovetail groove 24 extending in the longitudinal direction is formed on the upper surface of the camera mounting block 12, and a fixing screw 26 having a push head 25 at the groove bottom is screwed into the central axis position, and the dowel groove 24 is screwed to the camera mounting block 12. 12 is pivotally provided so as to be able to move in and out in the surface direction (arrow D) by operating a fastening lever 27 protrudingly provided on the bottom surface side end portion of 12. The dovetail groove 24 has a notch 28 at the center of one groove edge, and has a fitting structure for a one-touch mounting plate 30 described later.

The one-touch mounting plate 30 has a rectangular flat plate shape, and has sliding ribs 31 and 31 on both sides of the lower surface which slidably engage with the dovetail groove 24 of the camera mounting block 12 in the longitudinal direction (arrow E). In addition to the above structure, a rib notch 32 corresponding to the notch 28 of the dovetail groove 24 is formed at the center of one sliding rib 31. The width W1 of the front sliding rib 31 formed by the rib cutout 32 is smaller than the width W2 of the cutout 28 of the dovetail groove 24 (W1 <W2). By aligning the end (arrow F) of the one-touch mounting plate 30 with the line 29, at this position, a slide bayonet mechanism that can be fitted from the surface direction (arrow G) is configured. Reference numeral 33 denotes a retaining protrusion protruding from one side of the one-touch mounting plate 30, and the retaining protrusion 33 includes a stop pin 34 protruding at an end of the camera mounting block 12 and a sliding rib 31. It collides within the range that does not fall from 24.

The one-touch mounting plate 30 is always used by being fixedly mounted on the camera by using an accessory mounting female screw formed on the bottom surface of the body of the camera a. Screw shaft holes 35, 35 are respectively formed at the sides, and a mounting screw 36 is inserted from the bottom surface side and screwed and fixed to the bottom surface of the camera a. Further, reference numeral 37 is a fastening screw that is screwed on the bottom surface of the one-touch mounting plate 30 in the vicinity of the mounting screw 36. The fastening screw 37 has an end portion protruding and retreating to the upper surface side and fixed by the mounting screw 36. The tip end is pressed against the bottom surface of a, and the rotation of the camera about the mounting screw 36 is prevented.

In the tripod platform having the above-described configuration, the bolt b2 protruding from the platform support b1 of the tripod b is screwed and fastened to the tripod mounting female screw 9, and the detent screw 10 is also fastened. It can be pressed against the surface of b1 and securely fastened also in the rotating direction. The swivel and the tilt angle are adjusted by expanding and contracting the slit 3 by the swing swivel fastening handle 4 and tightening or releasing the fitting between the journal bearing 2 and the journal projection 7. The vertical rotation displacement of the camera mounting block 12 is performed by rotating both rotation knobs 21 and 22 of the pantograph type angle adjusting mechanism 13. As shown in FIG. 4, in this vertical angular displacement (arrow C), when the rotary knobs 21 and 22 are rotated to loosen the screws of the first fastening shaft 19 and the second fastening shaft 20, the bearing protrusion 17 is formed. The sliding frictional force at each second connecting rod 18, 12, and each first connecting rod 15, 15 and the pivoting portion of each second connecting rod 18, 18 is reduced, and the two connecting rods 15, which form a pantograph, The connection angle of 15 is released, whereby the camera mounting block 12 pivots about the support shaft 11.

Actually, since the one-touch mounting plate 30 on which the camera a is fixedly mounted is mounted on the camera mounting block 12, when the center of gravity on the camera side exceeds above the support shaft 11, a moment is generated in the reversing direction. Although it tries to fall to the outside, when the first fastening shaft 19 and the second fastening shaft 20 are loosened because the sliding area is increased by stacking a plurality of the first series rods 15 and the second connecting rods 18 together. By adjusting the tightening force of the device, it does not swivel and tilt rapidly, and it does not adversely affect the mounted equipment such as cameras. When the pantograph type angle adjusting mechanism 13 is fixed at the set angle, the fastening knobs 19 and 20 are tightened, so that the ends of the plurality of connecting rods 15 and 18 are overlapped and pressed against each other. It can be securely fixed by a small turning force.

In the above description of the embodiment, the structure in which the camera a is fixed through the one-touch plate 30 which is detachable from the camera mounting block 12 is shown. However, the structure is such that the camera is mounted on the camera mounting block 12. Of course, it does not matter even if the structure is directly fixed to.

[0015]

[Effect of device]

 As described above, in the tripod platform according to the present invention, the camera mounting block for rotationally displacing the mounted camera with the vertical plane as the rotational surface is pivotally mounted so that the angle can be adjusted through the pantograph type angle adjusting mechanism. As a result, the camera mounting block does not suddenly turn over, it can be securely tilted and fixed at an arbitrary angle with a small force, and it has excellent stability at the time of fixing. The practical effect after implementation is extremely large.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an exploded perspective view of a camera mounting block and a one-touch mounting plate.

FIG. 4 is a schematic front view showing the operation of the pantograph type angle adjusting mechanism in a state in which the posture of the camera is changed.

FIG. 5 is a partially cutaway front view showing a conventional platform.

[Explanation of symbols]

 1 Main body block 2 Journal bearing 4 Swiveling swivel fastening handle 6 Support block 7 Journal protrusion 11 Support shaft 12 Camera mounting block 13 Pantograph type angle adjusting mechanism 15 First series rod 18 Second connecting rod 19 First fastening shaft 20 Second fastening Shaft 21, 22 Rotating knob 30 Mounting plate a Camera b Tripod

Claims (2)

[Scope of utility model registration request] 1. A support block having screw fixing means fixed to a tripod platform receiver on the bottom surface, and a journal bearing rotatably fitted to a journal projection projecting on the upper surface of the support block. In addition, a main body block configured to expand / contract a slot formed in the journal bearing by a bolt portion of a fastening shaft formed in an oscillating turning fastening handle to rotationally fix or release, and a horizontal bridge at one end of the main body block. And a camera mounting block having camera mounting means on the upper surface, and one end of the first series rod rotatably mounted on the end of the main body block. One end of the second connecting rod is rotatably attached to a bearing projection that is provided on the end portion of the camera mounting block so as to be rotatable, and the other end portions of both connecting rods are pivotally attached. To the second fastening axis Therefore, a pantograph type angle adjusting mechanism having a structure in which the connecting portions are connected to each other and the pivoting portion is tightened or released by the screw action of the first fastening shaft and the second fastening shaft to change and adjust the connecting angle of both connecting rods. A tripod head that is characterized by this. 2. The pantograph type angle adjusting mechanism comprises a plurality of first connecting rods and a plurality of second connecting rods, and the connecting pivot portions of both members are alternately laminated and connected. The tripod head according to claim 1, wherein the tripod head is used.