JPS6040952Y2 - Automatic release prevention device for lock lever of tripod head attachment - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a device that allows a camera, cine camera, video camera, or other item to be locked with a locking lever that is removably attached to a tripod head. After the lock lever is locked, it prevents the lock from being released automatically due to an unexpected event such as the lever being caught on clothing, and this prevents the camera from being removed from the tripod head.
The object of the present invention is to provide a device for preventing the natural release of the attachment lock lever of a tripod head, which can prevent other attachments from falling off and being damaged. The frame part is fixed on the mounting base, and the frame part surrounds the top surface of the mounting base and protrudes upward, and the center frame part forms a space between the leading edges of the both side frame parts. A brake piece with a zigzag surface on the front is placed in a mouth-shaped notch groove that communicates with the inside and outside of the one side frame, and the zigzag surface is located inside the one side frame. The rear surface of the brake piece is fitted so as to be slidable so as to face toward the rear surface of the brake piece, and is supported on a mounting base such that it is always resiliently pushed outward from the side frame portion and does not protrude from the inner surface of the side frame portion. is the position of the rear end of the outer surface of one side frame when the lock lever with eccentric cam is tightened in relation to the eccentric head of the lock lever with eccentric cam pivotally mounted on the mounting base in the notch groove; The base of the lever stopper is pivoted to the support frame so as to be rotatable in the horizontal direction, and the tip of the lever stopper is pressed in one direction by a lock lever with an eccentric cam, and the eccentric cam is in a tightened state. A device for preventing natural release of a lock lever attached to a tripod/pan head is provided with a locking mechanism for locking the rear end of the lock lever and the rear end of the lever stopper.

The present invention will be described below with reference to the embodiments shown in the drawings.

As shown in FIG. 1, the lower part of the frame 2 is fixed on the mount 1 of the tripod head.

The frame portion 2 has two side frame portions 2a, 2b1 and a center frame portion 2c that surround the top surface of the mounting base 1 and protrude upward, so that the space between the leading edges 2' and 2' of the side frame portions 2a and 2b is formed. An opening 4 is formed therein.

In addition, one side frame portion 2b has an opening-shaped cutout groove 5 that communicates with the inside and outside.
A notched groove upper wall 6 extending rearward is formed above the notched groove 5.

Side walls 6a and 6b are formed at the rear extension of the notched groove upper wall 6 and are integral with the upper wall 6, and the side walls 6a and 6b are continuous with the side frame portion 2b.

A brake piece 7 is fitted into the cutout groove 5, and the brake piece 7 has a U-shaped cross section, and has both sleeve pieces 7a, 7.
b is further bent outward to form a spring support portion 7ct7d, and a zigzag surface 8 is formed on the outer surface of the U-shaped central piece 7e.

The zigzag surface 8 is slidably fitted into the notch groove 5 with the zigzag surface 8 facing inward of one side frame portion 2b, and the side frame portion 2b on the side of the notch groove 5 and the spring support portion 7c , 7d, and coil springs 9, 9 are suspended between the brake piece 7.
is always resiliently repelled to the outside of the side frame portion 2b, and is supported on the mounting base 1 so that the zigzag surface 8 does not protrude from the inner surface of the side frame portion 2b.

The adjustment plate 10 is placed on the back of the brake piece 7, fixed with the cover 11, and the eccentric cam head 12a of the eccentric cam-equipped lock lever 12 is pivotally mounted within the notch groove 5 and on the mounting base 1, and the lock lever 12 is operated. Therefore, the tip 12b
A lock lever with an eccentric cam is attached to the rear surface of the brake piece so that the zigzag surface 8 of the brake piece 7 can be pushed inward from the side frame portion 2b by pressing the rear surface of the cover 11.
12 eccentric cam heads 12a.

13 is a pivot, and 14 is a shaft hole.

A locking groove 20 for a locking pawl 34 of a lever stopper 32 (described later) is provided on the outer surface of the lock lever 12 with an eccentric cam, and a continuous lever stopper insertion slot 21 is provided at the rear lower part of the locking groove 20 on the front and back sides. Provided through.

On the outer surface of the side frame portion 2b, when the eccentric cam-equipped lock lever 12 is tightened, a bearing plate 30at3 is provided vertically in the direction where the rear end of the lever 12 is located, that is, on the side wall 6b side.
A support frame 30 for the lever stopper 32 is formed, and a shaft 31 is attached to the shaft support plate 3Oay30b of the support frame 30.
and attach the base 3 of the lever stopper 32 to the shaft 31.
2a is pivoted.

33 is a shaft hole.

At the tip of the stopper piece 32b protruding from the base 32a, there is a locking claw 3 on the side where the eccentric cam lock lever is located.
4 is formed, and a spring 35 is wound around the shaft 31 so that the tip of the stopper piece 32b is pressed against the eccentric cam lock lever 12 side to elastically repel the stopper piece 32b.

In the present invention, although not shown, a mounting seat 50 is attached to the bottom surface of an attachment to a tripod and pan head of a camera, etc., and the mounting seat has a shape and size that can be inserted into the frame 2 from the opening 4. A zigzag surface that matches the zigzag surface 8 of the brake piece 7 is formed on the side surface of the mounting seat 50 corresponding to the one side frame portion 2b.The mounting seat configured as described above is attached to the frame portion 2. When the eccentric cam head 12a is inserted and fitted into the frame 2 through the opening 4 and the eccentric cam lock lever 12 is actuated and tightened as shown in FIG.
2b presses the rear surface of the cover 11 to cause the brake piece 7 to protrude inward of the frame 2, and the zigzag surface 8 of the brake piece 7 is fitted into the zigzag surface of the side surface of the mounting seat 50 attached to an object such as a camera. Press to secure the attachment.

At this time, the rear end of the eccentric cam lock lever 12 rotates toward the front of the support frame 30 as shown in FIG. 32 is tilted by the repulsive force of the spring 35, and the locking pawl 34
is engaged with the locking groove 20 of the eccentric cam lock lever 12, and the eccentric cam lock lever 12 is locked in the above state.

When the lever stopper 32 is returned to its old position and the eccentric cam lock lever 12 is rotated around the shaft 13 in the release direction, the lever stopper 32 is removed from the lever stopper insertion slot 21, the lock is released, and the eccentric cam head is removed. The pressure on the brake piece 7 by the tip of the portion 12a is released, and the brake piece 7 retreats from the inner surface of one side wall portion 2b due to the repulsive force of the springs 9, 9.

As described above, the present invention provides a device in which a camera, a cine camera, a video camera, or other article is removably attached to a tripod head and can be locked using a lock lever. To prevent the lock from being automatically released due to an unexpected event such as the lever being caught on clothing after it has been locked, thereby preventing the camera or other attached objects from falling off and being damaged from the tripod head. This has the effect of providing a device for preventing natural release of a lock lever attached to a tripod and pan head.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main parts of the present invention, FIG. 2 is a sectional view showing the pivoting state of the lever stopper, and FIG. 3 is a partially cutaway plan view of the main parts of the invention. 1...Mounting base, 2...Frame, 2a, 2
b...Both side frame parts, 2c...Central frame part,
4...Opening, 5...Notch groove, 6...
...Notch groove upper wall, 7...Brake piece, butt.
...Zigzag surface, 9,9...Coil spring, 12...Tsuku lever, 20...
Locking groove, 21...Lever stopper insertion slot,
30... Support frame, 32... Lever stopper 34... Locking claw, 35... Spring.

Claims (1)

[Scope of utility model registration request] A frame is fixed on the mount of the tripod head, and the frame has both sides and a center frame that surround the top surface of the mount and protrude upward, so that the tips of the both sides of the frame are fixed. A brake piece with a zigzag surface on the front is placed in an opening between the edges and a notched groove that communicates with the inside and outside of the one side frame. The above-mentioned side frame is supported on a mounting base so as to be slidably fitted so as to face inward of the side frame, and is always resiliently pushed outward from the side frame so as not to protrude from the inner surface of the side frame. On the rear surface of the brake piece is a lock lever with an eccentric cam that is pivotally mounted on the mounting base in the notch groove.
A lever stopper support frame is formed on the outer surface of one side frame in relation to the eccentric head of the eccentric cam in the direction in which the rear end is located when the lock lever with eccentric cam is tightened, and the lever is attached to the support frame. A lock that pivots the base of the stopper so as to be rotatable laterally and presses the tip of the stopper in one direction of the lock lever with an eccentric cam, and locks the rear end of the lock lever with the eccentric cam in a tightened state and the rear end of the lever stopper. A device for preventing natural release of a lock lever attached to a tripod and pan head, which is equipped with a locking mechanism.