JP4303218B2 - Free pan head - Google Patents

Description

  The present invention relates to a free pan head with good operability of an operating body.

Conventionally, for example, a base body that is detachably attached to a tripod, a ball portion that is rotatably held by the base body, and an attachment support portion that is provided on the ball portion and to which an attachment such as a camera is attached There is known a free pan head equipped with a support body such as a camera base having a base and a slightly longitudinally rotatable operation lever for fixing and releasing the ball portion with respect to the base body. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-288811

  However, in the conventional free pan head, the operability of the operation lever cannot be said to be good, and there is a problem that, for example, the operation of turning the operation lever with the fingertip is particularly burdensome for the elderly. .

  The present invention has been made in view of the above points, and it is very easy to operate the operating body for fixing and releasing the ball portion with respect to the base body, and the operability of the operating body is good. The purpose is to provide a pan head.

The free pan head according to claim 1 is a base body mounted on the top of a tripod, a ball part rotatably held by the base body, and an object to be attached provided on the ball part. A support body having an attachment support section, and a substantially columnar operation body provided on the base body so as to be rotatable, and for fixing the ball portion to the base body and releasing the fixing. The operating body can be rotated about an eccentric shaft that is shifted in parallel downward from the central axis of the operating body within a range in which the lower end of the operating body is not positioned below the lower end of the base body. The ball portion is fixed to the base body by rotating the operation body in one direction around the eccentric shaft, and the operation body is moved in the other direction around the eccentric shaft. By rotating to Serial fixed to the base body of the ball portion is intended to be released.

The free pan head according to claim 2 is the free pan head according to claim 1, wherein the base body side end surface of the cylindrical portion of the operating body is disengaged from the base body when the ball portion is released from the base body. And an engagement portion for restricting rotation that restricts rotation of the operating body in the other direction by projecting.

According to the onset bright, since the operation body by the force of the wrist by gripping the operating body can be rotated operation, fixing and operation of the operating member for releasing the fixing of the ball portion relative to the base body is extremely easy, Ri operability excellent der of the operation body, also, since the operation body is a lower end of the operating body has a rotatable operation within a range not positioned below the lower end of the base body, for example, operating body The lower end of the camera does not interfere with the upper part of the tripod.

  An embodiment of a free pan head of the present invention will be described with reference to the drawings.

  1 and 2, reference numeral 1 denotes a free pan head. The free pan head 1 is detachably mounted on the top of a tripod 2 and is held by the base body 3 so as to be rotatable in an arbitrary direction. A support body 7 such as a camera base having a spherical ball portion 5 and an attachment object support portion 6 provided on the ball portion 5 to which an attachment object (not shown) such as a camera is detachably attached; An operation body 10 having a substantially cylindrical shape for fixing the ball portion 5 to the base body 3 and releasing the fixing is provided.

  The base body 3 has a bottom plate portion 11 in which a female screw hole to be screwed into the male screw on the top of the tripod 2 is formed. The bottom plate portion 11 is provided with a pair of ball receiving portions 12 that rotatably hold the ball portion 5 of the support body 7. The distance between the two ball receiving portions 12 is changed by rotating the operating body 10.

  The support 7 includes a ball portion 5 and an attachment support portion 6, and the attachment support portion 6 includes a support member 21 provided integrally with the ball portion 5, and a hole of the support member 21. The screw operation member 24 has a male screw portion 23 inserted through the portion 22 and is biased upward by a spring (not shown). When attaching an attachment such as a camera to the attachment support 6 of the support 7, the screw operation member 24 is operated so that the male screw portion 23 of the screw operation member 24 is attached to the bottom of the attachment. Screw into the female screw hole.

  The operating body 10 has a substantially cylindrical shape whose axial direction coincides with the horizontal direction. The operating body 10 protrudes from the side of the base body 3 so as to be rotatable, and extends along the axial direction (horizontal direction) of the operating body 10. It can be rotated about an eccentric shaft B shifted in parallel downward from the central axis A.

  The operating body 10 can be rotated within a rotating range where the lower end of the operating body 10 is not located below the lower end of the bottom plate portion 11 of the base body 3 (for example, α = about 60 degrees). . That is, the lower end of the operating body 10 does not protrude downward from the base body 3. The outer diameter of the substantially cylindrical operating body 10 is substantially the same as the diameter of the ball portion 5 of the support 7. The central axis A of the operating body 10 is a central axis line that is at an equal distance from the outer periphery of the operating body 10.

  Then, by rotating the operating body 10 in one direction around the horizontal eccentric axis B (for example, rotating operation of about 60 degrees clockwise in FIG. 2), both ball receiving portions of the base body 3 are operated. The distance between 12 is reduced and the ball portion 5 is fixed to the base body 3. Further, by rotating the operating body 10 in the other direction around the eccentric shaft B in the horizontal direction (for example, rotating operation of about 60 degrees counterclockwise in FIG. 2), both ball holders of the base body 3 are received. The distance between the parts 12 increases and the fixation of the ball part 5 to the base body 3 is released.

  Here, as shown in FIG. 3, the operating body 10 is attached to the base body 3 via a shaft body 33 in which a threaded portion 31 and a knurled portion 32 are formed, and the operating body 10 is an eccentric position of the operating body 10. Rotating operation is possible around the shaft 33 located at the center. The shaft core 33 is the eccentric shaft B.

  Further, the operating body 10 includes a horizontal and substantially columnar cylindrical portion 35, and a substantially circular plate fixed to the end surface of the cylindrical portion 35 opposite to the axial end surface on the base body 3 side with a screw 36. Disk-shaped part 37. A hole 38 is formed in the columnar portion 35 at an eccentric position of the columnar portion 35, and a shaft body 33 is inserted into the hole 38, and a coil is interposed between the shaft body 33 and the disk-shaped portion 37. A spring 39 and a washer 40 are disposed. The knurled portion 32 of the shaft 33 is fitted to the knurled portion 32 facing the hole 38 of the cylindrical portion 35.

Furthermore, the end surface of the cylindrical portion 35 of the operating body 10 on the base body 3 side is engaged with an engagement receiving portion (not shown) of the base body 3 when the fixation of the ball portion 5 to the base body 3 is released. engaging portion 41 for rotation restriction for restricting the rotation in the other direction of the operating body 10 Te are projected. Further, a plurality of groove portions 42 along the axial direction of the operating body are formed on the outer peripheral surface portion of the cylindrical portion of the operating body 10 at intervals over the entire circumference.

  Next, the operation of the free pan head 1 will be described.

  When an attachment object such as a camera is attached to the support 7 of the free pan head 1 mounted on the top of the tripod 2 and the attachment object is fixed after being matched to the object, for example, three thumbs, an index finger and a middle finger When the operating body 10 is gripped by a finger and the operating body 10 is rotated in one direction about the eccentric axis B so as to utilize the wrist force, the distance between the ball receiving portions 12 of the base body 3 is determined. Decreases, and the ball portion 5 of the support 7 is fixed to the base 3.

  Further, for example, when it is necessary to change the orientation of an attached object such as a fixed camera, the operating body 10 is grasped with three fingers, for example, the thumb, the index finger, and the middle finger, and the wrist force is used. Thus, when the operating body 10 is rotated in the other direction around the eccentric axis B, the distance between the ball receiving portions 12 of the base body 3 increases, and the ball portion 5 of the support body 7 with respect to the base body 3 is increased. Fixing is released.

  As described above, according to the above-described free pan head 1, the operation body 10 can be rotated by gripping the substantially cylindrical operation body 10 and using the wrist force, that is, by using a snap. Thus, the operation body 10 is extremely easy to operate, the operability of the operation body 10 is good, and there is no heavy burden on the fingers of the elderly.

  Further, since the operating body 10 can be rotated within a rotation range in which the lower end of the operating body 10 is not located below the lower end of the base body 3, for example, the lower end of the operating body 10 is connected to the upper part of the tripod 2. There will be no interference.

  Note that the substantially cylindrical shape of the operating body 10 includes a truncated cone shape and the like in addition to a cylindrical shape in a strict sense.

  Further, the rotation angle α at which the operating body 10 can be rotated is not limited to about 60 degrees, and may be about 90 degrees, about 120 degrees, etc., and preferably about 60 degrees to about 90 degrees.

It is a perspective view of one embodiment concerning the free pan head of the present invention. It is a front view of a free pan head same as the above. It is a disassembled perspective view of the principal part of a free pan head same as the above.

Explanation of symbols

1 Free pan head
2 Tripod 3 Base body 5 Ball part 6 Attachment object support part 7 Support body
10 Operation body
35 cylinder
41 Engagement part A Center axis B Eccentric shaft

Claims (2)

A base body mounted on the top of the tripod ;
A support body having a ball portion rotatably held by the base body, and an attachment support portion provided on the ball portion to which an attachment object is attached;
The base body is provided so as to be rotatable , and includes a substantially columnar operation body for fixing the ball portion to the base body and releasing the fixation.
The operating body can be rotated about an eccentric shaft that is shifted in parallel downward from the central axis of the operating body within a range in which the lower end of the operating body is not positioned below the lower end of the base body. And
By rotating the operating body in one direction around the eccentric shaft, the ball portion is fixed to the base body,
The free pan head is characterized in that the ball unit is released from being fixed to the base body by rotating the operating body around the eccentric shaft in the other direction. The end surface on the base body side of the cylindrical portion of the operating body engages with the base body and restricts the rotation of the operating body in the other direction when the ball portion is released from being fixed to the base body. The engaging part for regulation is projected
The free pan head according to claim 1.

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