JPH0736237Y2 - Leg fixing device for tripod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a fixing device for a leg portion of a tripod used for a camera for photography, a camera for video, and the like.

[Prior Art] As a conventional fixing device for a leg portion of a tripod, for example,
Examples thereof include those described in Japanese Utility Model Publication No. 62-126698.

This will be described with reference to FIG.
An operating lever having a cam 27 at one end for fixing the inner tube 14 on the rectangular tube slidably inserted in the inner tube 14 at a desired position.
26 is rotatably provided at the corner of the outer tube 12 via the operation lever holding member 22, and the pressing member 24 is provided between the cam 27 of the operation lever 26 and the corner of the inner tube 14. The pressing member 24 has a contact surface on one surface for contacting a corner of the inner tube 14, and a slide contact surface on the other surface for the cam 27 of the operation lever 26 to press and slide. The cam 27 is a tripod leg fixing device characterized in that the rotation of the operation lever 26 gradually pushes the pressing member 24 against the corner of the inner pipe 14.

[Problems to be Solved by the Invention] In the above-described conventional technique, since the joint surface between the cam of the operation lever and the pressing member is formed so as to be completely in close contact with each other, the cam is not only tightened at the time of tightening but also released. The frictional resistance between the pressing member and the pressing member is large, the cam rotation is hard and does not operate smoothly, it is difficult to operate, and the joint surface is worn due to long-term use, and a strong tightening force cannot be obtained. There was a point.

At the same time, since a clear squeezing feeling and a feeling of ending cannot be obtained when tightening, the position where the operation lever stops is simply fixed. For this reason, it is not possible to obtain a clear feeling that the legs are completely fixed on the operation, and it is often used in a semi-fixed state to prevent accidents such as the operation lever coming off during shooting. I couldn't.

Also, the conventional one is squeezed and fixed at the corners of the legs of the tripod, so the operation lever of the squeezing part is projected outside from the corners of the legs, and the photographer's In many cases, the operating lever comes off due to contact with the foot, etc., and clothes etc. are often caught on the operating lever and the tripod itself is tilted, and the operating lever also protrudes outside when carrying or storing. Therefore, there is a problem that it is difficult to carry or store.

Since the material of the legs of the tripod itself is made lighter, thin ones such as plastic are used. Conventional fixing devices are tightened and fixed at the corners of the legs. Due to the strong tightening force, the corners of the inner pipe are often worn and deformed.

Further, since the conventional tightening portion is the corner portion of the leg portion, there is a problem that the tightening area is small and it is not possible to tighten firmly and stably.

For this reason, the operation can be performed smoothly and a clear squeezing feeling can be obtained when squeezing, and the operation lever does not come off during shooting work and can be easily carried and stored during storage. It has been strongly desired to develop a fixing device for the legs of a tripod that can firmly tighten the inner tube without causing the inner tube to be worn and deformed even by the repeated strong tightening force. .

[Outline of the Invention] The present invention was made in order to meet the above-mentioned demand.
The legs can be tightened and fixed smoothly and easily, and a clear squeezing feeling can be obtained when tightening, and the operation lever does not come off during shooting work, and it is easy to carry and store. An object of the present invention is to obtain a fixing device for a leg portion of a tripod that can be carried and stored, and the leg portion can be firmly and stably squeezed without being worn and deformed due to repeated strong squeezing force. To do.

[Means for Solving the Problems] The present invention has been made to solve the above problems, and adopts the means described below.

The present invention is a tubular type in which an operating lever 8 having a pressing head 9 is rotatably pivotally mounted in order to fix an inner cylinder 7 inserted in an outer cylinder 3 so as to be able to move forward and backward, at a desired position. Fixing device body 4
In a device for fixing a leg portion of a tripod provided at the tip of the outer cylinder 3, a notch is provided at a position facing the outside of the outer cylinder 3, that is, a surface excluding the inner side surface and the left and right side surfaces of the outer cylinder 3. A flat retainer plate 6 is loosely fitted in the window portion 5, and the retainer plate 6 allows the outer portion of the inner cylinder 7 that is inserted into the outer casing 3 so as to be able to move back and forth to be freely pushed, and At a position facing the window 5, the pressing head 9 of the operation lever 8 is eccentrically rotatably eccentrically mounted, and the operation lever 8 is curved and formed into a shape wound around the outer cylinder 3, The pressing head 9 causes the pressing plate 6 to move.
The inner cylinder 7 is squeezed to fix the inner cylinder 7 so that it can be fixed, and when the abutting portion of the pressing head 9 comes into contact with the pressing plate 6, a predetermined angle with respect to the pressing plate 6, that is, an angle of about 3 degrees. A flat pressing portion 11 is formed by cutting so as to hold it, and the pressing plate 6 and the pressing portion 11 are not in close contact with each other and can be separated at a predetermined angle, that is, an angle of about 3 degrees. ,
The pressing contact portion A is made to act as a fulcrum, and an upward repulsive force B from the pressing contact portion A when the inner cylinder 7 is tightened and fixed is constantly and continuously generated to press the pressing plate 6. It is characterized in that a pressing force from the head portion 9 is constantly and continuously generated to stably obtain a strong pressing force.

[Operation] With the above-described structure of the present invention, the legs can be tightened and fixed smoothly and easily, and a clear click feeling can be obtained when the operation lever is tightened, which is firm and firm. The inner cylinder can be firmly and stably fixed at a desired position.

In addition, the present invention does not cause the operation lever to come off or the tripod itself to fall during the photographing work, and the operation lever is integrated with the leg portion so that it can be carried without obstruction and can be easily carried during storage. It is possible to obtain a fixing device for a leg portion of a tripod that can be stowed, and the leg portion is not worn and deformed due to repeated strong tightening force and can be tightly and stably tightened. is there.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, a fixing device body 4 for fixing the inner cylinder 7 to a desired position is attached to the tip of the outer cylinder 3 of the leg portion 2 of the tripod 1 for cameras and video cameras. The main body 4 is formed in a tubular shape and covers the tip of the outer cylinder 3 and is attached.

In the case of the tripod 1 in which the inner cylinder 7 and the second inner cylinder 12 are slidably inserted in the outer cylinder 3 as shown in FIG. 1, the fixing device main body 4 has a distal end of the inner cylinder 7. It is also provided in the section to fix the second inner cylinder 12 at a desired position.

The outer cylinder 2, the inner cylinder 7, and the second inner cylinder 12 can be formed in a desired shape such as a rectangular tube shape or a cylindrical shape.

In FIG. 2, a rectangular window portion 5 is cut out at a position facing the outside of the outer cylinder 3, and a rectangular holding plate 6 is loosely fitted in the window portion 5. Cage, this holding plate 6
Allows the outer portion of the inner cylinder 7, which is fitted in the outer cylinder 3 so as to be movable back and forth, to be freely pressed.

As described above, the window portion 5 is not provided at the corner portion of the outer cylinder 3 as in the conventional case, but is provided at a position facing the outside of the outer cylinder 3, that is, a surface excluding the inner side surface and the left and right side surfaces of the outer cylinder 3. Has been.

Therefore, the window portion 5 can be formed wide, and the pressing plate 6 loosely fitted in the window portion 5 can be formed large in area.

As a result, the area of the fixed portion of the outer surface of the inner cylinder 7 that is pressed by the pressing plate 6 and tightened is increased, and the tightening and fixing force can be increased and stabilized. Moreover, even if a strong tightening force is repeatedly generated, the corners and the like are not worn and deformed, and the tightening and fixing can be performed firmly.

A pressing head portion 9 of an operating lever 8 is rotatably attached to the outer surface of the fixing device body 4, that is, a position facing the window portion 5, so as to be rotatable. The pressing head 9 presses the pressing plate 6 to squeeze and fix the outer surface of the inner cylinder 7. The pressing head 9 is formed in a substantially circular shape so as to be easily rotated at the time of squeezing and fixing, and is strong. It is pivotally mounted 10 in an eccentric position to obtain a tight tightening force.

As described above, since the operation lever 8 is provided not on the corners of the outer cylinder 3 but on the outer side surface and the operation lever 8 is curved and wound around the outer cylinder 3, The degree of protrusion to the outside of the tube 3 is small, and even if the operating lever 8 touches a foot or the like during shooting work, the fixed state is not released, and even if the operating lever 8 touches the photographer's clothes or the like, the pulling operation is not performed. There is no possibility of hanging.

Since the operation lever 8 does not project to the outside when carrying or storing, it can be easily carried and stored without disturbing.

The pressing portion 11 of the pressing head 9, that is, the portion that comes into contact with the pressing plate 6 when pressed and fixed, is cut to a predetermined angle and formed flat.

Since the pressing portion 11 is formed flat and has a predetermined angle, a clear squeezing feeling can be obtained when the operation lever 8 is squeezed, and the inner cylinder 7 can be firmly and firmly and stably. Squeeze and fix the outer part of the inner cylinder 7
Can be fixed in a desired position.

That is, when the pressing plate 6 and the pressing portion 11 do not maintain a predetermined angle and are in contact with each other at an angle of 180 degrees, that is, when both are in a parallel state and are simply in close contact with each other, they repel each other. Since no force is generated, a strong tightening force and pressing force cannot be obtained. At the same time, due to long-term use, play gradually occurs between the two, and the abutting portion becomes loose, making it impossible to obtain a strong tightening force.

The pressing portion 11 of the present invention, as shown in FIG. 3 and FIG.
At the time of contact, the pressing plate 6 is separated from the pressing plate 6 at a predetermined angle, for example, about 3 degrees, and this angle is set when the pressing head 9 is cut to form the pressing portion 11. To be done.

In this way, the pressing plate 6 and the pressing portion 11 hold a predetermined angle when they come into contact with each other, that is, an angle of about 3 degrees, so that the fourth
As shown in the figure, an upward repulsive force B is applied to the pressing contact portion A.
This repulsive force B acts on the shaft 10 as a fulcrum in the direction of the arrow because the pressing head 9 is rotating around the shaft 10 as a fulcrum, and the pressing head 9 is further rotated to cause the pressing portion 9 to rotate. Since 11 is brought closer to the pressing plate 6, the pressing force on the pressing plate 6 is further strengthened.

That is, the pressing contact portion A has a function as a fulcrum of urging, and the upward repulsive force B from the pressing contact portion A when the inner cylinder 7 is tightened and fixed is constantly and continuously. As a result, the pressing force from the pressing head 9 against the pressing plate 6 is constantly and continuously generated, and a strong pressing force is stably obtained.

Further, when tightening and fixing, the pressing plate 6 and the pressing portion 11 are
Both of them are formed flat and are held at a predetermined angle at the time of contact, that is, an angle of about 3 degrees, so that the pressing contact part A is rotated as a fulcrum of the squeeze to perform the tightening work. When the operating lever 8 is pushed further downward at the end point, the pressing plate 6 and the pressing portion 11 once come into contact with each other, and at the time of the contact, a squeezing feeling as a snap is obtained.

When the pressing plate 6 and the pressing portion 11 are in contact with each other at the end point during tightening, when the hand is released from the operation lever 8, the pressing contact portion A is used as a fulcrum to hold the two at a predetermined angle. The separated state is maintained, and continuous pressing force continues to be generated.

The desired angle formed by the pressing plate 6 and the pressing portion 11 when tightened and fixed is preferably about 3 degrees. For example, when the angle is set to 5 degrees, the pressing plate 6 and the pressing portion 11 are Are too far apart, so there is little repulsive force. Further, when the angle is set to 1 degree, the pressing plate 6 and the pressing portion 11 are too close to each other, and there is not much difference from the case of 0 degree, and the repulsive force is not generated.

[Advantages of the Invention] With the configuration of the present invention as described above, it is possible to squeeze and fix the legs smoothly and easily and to obtain a clear squeezing feeling when the operation lever is squeezed. The inner cylinder can be firmly and firmly fixed to a desired position in a stable manner.

In addition, the present invention does not cause the operation lever to come off or the tripod itself to fall during the photographing work, and the operation lever is integrated with the leg portion so that it can be carried without obstruction and can be easily carried during storage. It is possible to obtain a fixing device for a leg portion of a tripod that can be stowed, and the leg portion is not worn and deformed due to repeated strong tightening force and can be tightly and stably tightened. is there.

[Brief description of drawings]

The drawings show an example of the implementation of the present invention. FIG. 1 is a partially cutaway front view of a leg part to which the fixing device of the present invention is attached, and FIG. 2 is a sectional view taken along line AA of the same. FIG. 4 and FIG. 4 are front views showing a contact state between the pressing head and the pressing plate, and FIG. 5 is a partially cutaway plan view of a conventional fixing device. 3 ... Outer cylinder, 4 ... Fixing device main body, 5 ... Window part, 6 ... Holding plate, 7 ... Inner cylinder, 8 ... Operation lever, 9 ... Press head, 10 ... Shaft, 11 ... Pressing part

Claims (1)

[Scope of utility model registration request] 1. A pressing head (9) for fixing an inner cylinder (7) inserted in an outer cylinder (3) so as to be able to move back and forth at a desired position.
A fixing device for a leg portion of a tripod in which a tubular fixing device main body (4) rotatably and pivotally mounted on an operating lever (8) is provided at the tip of the outer cylinder (3). (3)
A flat pressing plate (6) is loosely fitted to a window portion (5) provided at a position facing the outer side of the outer cylinder (3), excluding the inner side surface and the left and right side surfaces of the outer cylinder (3), A position at which the outer portion of the inner cylinder (7) inserted into the outer cylinder (3) by the plate (6) so as to be movable back and forth can be pressed, and faces the window portion (5) of the fixing device body (4). In addition, the pressing head (9) of the operating lever (8) is eccentrically rotatably eccentrically mounted (10), and the operating lever (8) is curved and wound around the outer cylinder (3). A portion of the pressing head (9) that contacts the pressing plate (6) of the pressing head (9) by pressing the pressing plate (6) to squeeze and fix the inner cylinder (7). Is cut so as to maintain a predetermined angle with respect to the pressing plate (6) at the time of contact, that is, an angle of about 3 degrees to form a flat pressing portion (11), and the pressing plate (6) is formed. And the pressing portion (11) are not in close contact with each other, and can be separated at the predetermined angle, that is, an angle of about 3 degrees, and the pressing contact portion (A) acts as a fulcrum of the inner ring. An upward repulsive force (B) from the pressing contact portion (A) at the time of tightening and fixing (7) is constantly and continuously generated, and the pressing head (9) is pressed against the pressing plate (6). A fixing device for a leg portion of a tripod, characterized in that a pressing force is constantly and continuously generated to stably obtain a strong pressing force.