JPH09258306A - Quick shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable firmly fixing by a small energizing force, to enable detaching only by a small force and to remarkably improve operability. SOLUTION: When a slide plate 2 is inserted into a shoe 1 in a direction shown by an arrow X, a locking lever 322 is rotated to right through a lock releasing pin, then, a main lever 11 and a locking lever 20 are rotated to right through springs 12 and 21. Thus, the slide plate 2 is pressurized to right by the pressing part 14a of a pressing member 14, the wedge surface 18b of a checking member 18 is bitten into a gap between the inclined surface part 14b of the pressing member 14 and the side wall 1j of the shoe 1, then, the pressing member 14 is prevented from returning by the bitten wedge action, simultaneously, the slide plate 2 is interrupted by the locking lever 20 from moving in the direction shown by the arrow X. In the case of pushing the releasing member 26 to left in this state, the checking member 18 descends through an auxiliary lever 16, thereafter, the main lever 11 and the locking lever 20 are rotated to left and a locking released state is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a shoe fixed to a tripod, a monopod or the head of a platform, and a slide plate fixed to the bottom of a camera. The present invention relates to a quick shoe that can be quickly attached to a tripod or a platform.

[0002]

2. Description of the Related Art This type of quick shoe makes it very easy to attach and detach the camera to and from a tripod, a monopod, or a platform (hereinafter collectively referred to as "tripod"), so that handheld photography and tripod photography can be performed. This is extremely convenient for frequent alternations.

Conventionally, there are various types of quick shoes on the market, but they are roughly classified into a manual fixing type and an automatic fixing type. There are various methods for attaching and detaching the shoe, but for professional models, a pair of left and right dovetail grooves are provided on the shoe side, and a rib that fits loosely in the dovetail groove is provided on the slide plate side so that it can be slid forward and backward. Many are removable.

The manual fixing type fixes the slide plate by pressing the slide plate in a direction orthogonal to the inserting direction with a manual screw in a state where the slide plate is inserted and firmly pressing the rib on the opposite side into the dovetail groove. Or
A flat cam is formed on the lower surface of the slide plate, and the slide plate is pushed up by the cam and fixed to the inner surface of the groove of the shoe by rotating a tightening lever having a cam surface facing the flat cam by a predetermined angle. It is a thing.

Further, the automatic fixing type is provided with an eccentric lever on the shoe side, which is rotatable in place of the manual fixing type manual screw and is capable of pressing and releasing the slide plate by rotating a predetermined angle. Is urged in the pressing direction. Prior to mounting the slide plate, the eccentric lever is locked in the biased state, the lock is released in connection with the slide plate insertion, and the eccentric lever is rotated to the pressing position by its own biasing force to slide the slide plate to the shoe side. It is fixed by pressing in one direction.

[0006]

However, in such a conventional quick shoe, the manual fixing type has a problem that if the manual screw is excessively tightened in order to firmly fix the slide plate on the camera side to the shoe, At the same time as it becomes difficult to release, there is a problem that unreasonable force is applied and each part is deformed, or the screw part is worn and the tightening is easily loosened due to vibration or the like due to long-term use.

Further, in the automatic fixing type, since the eccentric lever must be set against a strong urging force before mounting the slide plate, a strong force or a large actuation amount is required and the eccentric lever is required. A strong force was required to release the fixation against the strong frictional force with the slide plate, which was also difficult to operate.

Further, since any type requires a strong force to release the fixation of the slide plate, the slide plate may slip off the shoe due to the shock at the time of release, and the important camera may be damaged. It is necessary to provide a drop-out prevention device that prevents the slide plate from dropping at a time even if the screw or eccentric lever is released, and to further remove the drop-out prevention device so that the camera can be completely removed. However, the structure was complicated and there was a problem in operability.

The present invention has been made in view of the above points, and an object of the present invention is to provide a quick shoe that can be firmly fixed and released with a weak force.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a shoe fixed to the head of a tripod and a shoe fixed to the bottom of a camera and removably inserted in a pair of dovetail grooves of the shoe. In a quick shoe including a slide plate, a pressing member that is biased in a direction that presses the slide plate in one direction orthogonal to the dovetail groove, and a direction in which the pressing member and the shoe fixing portion are inserted. A quick shoe provided with a wedge-shaped detent member that is biased to prevent the pressing member from returning and a release member that drives the pressing member and the detent member to the stored position against the respective biasing forces. Is provided. Then, the release member drives the detent member to the energy storage position prior to driving the pressing member to the energy storage position.

[0011]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a bottom view showing the bottom surface of a shoe according to an embodiment of the present invention before the slide plate is attached with the bottom lid removed, FIG. 2 is a plan view showing the top surface of the shoe, and FIG. 3 is a slide plate. FIG. 4 is a bottom view showing a surface of the shoe facing the shoe, and FIG. 4 is a cross-sectional view showing a state where the slide plate is mounted on the shoe.

As shown in FIG. 4, this quick shoe has a shoe 1 having a tripod screw hole 1c screwed to the head of a tripod, and a pair of V-shaped cross sections provided on the upper surface of the shoe 1. It comprises a slide plate 2 having ribs 2a, 2b slidable in dovetail grooves 1a, 1b and screwed to the bottom surface of a camera (not shown). The bottom surface of the shoe 1 is covered with a bottom lid 3, and a set screw 4 is rotatably inserted through the through hole 2c of the slide plate 2.

FIG. 1 shows the lower surface of the shoe 1 from which the bottom cover 3 has been removed. The main lever 11 having a claw portion 11a at its tip is pivotally attached by a shaft 10 and is rotated clockwise by a main spring 12. Energize. A shaft 13 is provided on the driving lever 11 to pivotally attach a pressing member 14, and one end of the pressing portion 14a is attached to the shoe 1
The through hole 1d is inserted into the groove 1a so as to project into the groove 1a, and the inclined surface portion 14b is formed at the other end.

The L-shaped auxiliary lever 1 is provided by the shaft 15.
6 is urged in a clockwise direction by an auxiliary spring 17 and its rear end 16b is slidable up and down in the drawing.
The wedge surface 18b is bent and formed on the tip end side of the detent member 18, and the wedge surface 18b can be engaged with and disengaged from the inclined surface portion 14b of the pressing member 14.

Further, a lock lever 20 is pivotally attached to the lower surface of the shoe 1 by a shaft 19 and is urged in a clockwise direction by a lock spring 21 to form a bent portion 20a formed at an intermediate portion of the lock lever 20 in the shoe 1. The through hole 1e is inserted and projected into the groove 1a so that it can be engaged with the lock groove 2c (FIG. 3) formed in the rib 2a of the slide plate 2, and the claw portion 20b is provided at the tip of the lock lever 20. Form this claw 20
Let b be a position that substantially overlaps the claw portion 11a of the drive lever 11.

A locking lever 22 having a locking portion 22a capable of locking the claw portions 11a and 20b with the driving spring 12 and the lock spring 21 stored therein is pivotally attached to the shoe 1 by a shaft 23. The spring 24 urges it in the counterclockwise direction.
Then, the lock release pin 25 implanted in the lock lever 22 is inserted into the elongated hole 1f of the shoe 1 so as to protrude into the groove 1a, and at the end of the insertion of the slide plate 2, the stepped portion 2d (FIG. 3). ) Drives the lock release pin 25 upward in FIG. 1, thereby enabling the lock lever 22 to rotate clockwise against the biasing force of the spring 24.

In order to release the lock of the slide plate 2 by locking the driving lever 11 and the lock lever 20 in the stored state shown in FIG. 1, a releasing member 26 is provided slidably in the left and right direction and a spring 27 is used. While biasing to the right,
The right end side is urged downward by the spring 28. Release member 26
The guide pin 29 is planted on the left end side of the
9 slides in the long groove 1g and the groove portion 1h of the shoe 1 so as to be slidable right and left. At the rightward end shown in FIG. 1, the cutout portion 26a engages with the protrusion 1i on the shoe 1 side, and the release member 26 is released. A slight right turn is made possible, and the falling portion 26b can be engaged with the tip 16a of the auxiliary lever 16.

Next, the operation of the quick shoe having the above structure will be described. In the state shown in FIG. 1, the ribs 2a, 2b of the slide plate 2 are connected to the dovetail grooves 1a, 1 of the shoe 1.
When it is inserted from the X direction indicated by the arrow in accordance with b, the step portion 2d of the rib 2a shown in FIG. 3 pushes the lock release pin 25 upward in the drawing to prevent the lock lever 22 from resisting the urging force of the spring 24. And turn it to the right. As a result, the locking of the claw portions 11a and 20b by the locking portion 22a is released, and the main drive lever 11 and the lock lever 20 are rotated rightward by the biasing forces of the main drive spring 12 and the lock spring 21, respectively.

When the driving lever 11 is rotated clockwise, the pressing member 14 pivotally attached to the driving lever 11 by the shaft 13 moves rightward,
The pressing portion 14a presses the rib 2a of the slide plate 2 to the right by the urging force of the driving spring 12 to press the rib 2b into the existing groove 1b and prevent the slide plate 2 from moving in the X direction shown by the arrow.

When the pressing member 14 moves to the right, the wedge surface 1 of the detent member 18 engaged with the inclined surface portion 14b thereof.
8b becomes free, the detent member 18 moves in the X direction indicated by the arrow by the urging force of the auxiliary spring 17, and the side wall 1j of the shoe 1 moves.
And the wedge surface 18b of the detent member 18 to prevent the pressing member 14 from returning in the left direction so that the slide plate 2 does not move even if a strong force is applied.

At this time, the force for pressing the rib 2b of the slide plate 2 against the dovetail groove 1b of the shoe 1 via the pressing member 14 is retained by the wedge action of the wedge surface 18b of the detent member 18, so that it is driven. The biasing force of the spring 12 and the auxiliary spring 17 does not necessarily have to be strong, and the fixing of the slide plate 2 becomes extremely strong.

At the same time, the locking lever 22 rotates clockwise to release the locking of the claw portion 20b of the lock lever 20. Therefore, the lock lever 20 is rotated clockwise by the urging force of the lock spring 21 and is folded. The curved portion 20a is fitted in the lock groove 2c of the slide plate 2 to prevent displacement in the X direction shown by the arrow. FIG.
Shows the state where the slide plate 2 is completely attached.

From this state, the release member 26 is slightly counterclockwise rotated against the urging force of the spring 28 with the guide pin 29 as a fulcrum, and the notch 26a is disengaged from the protrusion 1i of the shoe 1 and then pushed leftward. The falling portion 26b drives the tip 16a of the auxiliary lever 16 to move the auxiliary lever 16 to the auxiliary spring 1
7 counterclockwise against the biasing force of 7, and the detent member 18 moves downward in conjunction with the rear end 16b.

When the releasing member 26 continues to move leftward, the guide pin 29 rotates the driving lever 11 and the lock lever 20 counterclockwise against the urging force of the driving spring 12 and the lock spring 21, and the claw portions 11a and 20b thereof are locked. The lever 22 is moved to a position where it is sufficiently locked by the locking portion 22a, and the state shown in FIG. 6 is obtained. In this state, the pressing of the slide plate 2 by the pressing portion 14a of the pressing member 14 that interlocks with the driving lever 11 is released, and the bent portion 20a of the lock lever 20 separates from the lock groove 2c of the slide plate 2.

Therefore, the slide plate 2 can be easily removed by holding the release member 26 with one hand and grasping the camera (not shown) with the other hand and pulling it out of the shoe 1. At this time, the urging force acting on the releasing member 26 in the projecting direction is the main spring 12, the auxiliary spring 17, the lock spring 21, and the spring 27, and all of them are weak. Since it is small, it is extremely easy to press the release member 26 with one hand while grasping and pulling out the camera with the other hand, and it is not necessary to provide a separate means for preventing the camera from falling off.

[0026]

As described above, in the quick shoe according to the present invention, the pressing member that presses the slide plate to one side orthogonal to the dovetail groove of the shoe is prevented from returning by the wedge action of the detent member. Therefore, a small urging force enables firm fixation, and a weak force required for removal is sufficient, and operability can be significantly improved.
Therefore, it is possible to simplify the configuration without separately providing a drop-out preventing means and to supply a high-performance quick shoe at low cost. Further, if the release member drives the detent member before the pressing member, the frictional resistance due to the sliding contact between the two members is eliminated, and the operation of the release member can be further facilitated.

[Brief description of drawings]

FIG. 1 is a bottom view showing a bottom surface of a shoe according to an embodiment of the present invention before removing a slide plate and removing a bottom lid.

FIG. 2 is a plan view showing the upper surface of the shoe.

FIG. 3 is a bottom view showing the surface of the slide plate that faces the shoe.

FIG. 4 is a transverse sectional view showing a state where the slide plate is mounted on the shoe.

FIG. 5 is a bottom view showing the bottom surface of the shoe when the slide plate is attached and the bottom lid is removed.

FIG. 6 is a bottom view showing the bottom surface of the shoe when the slide plate is removed with the bottom lid removed.

[Explanation of symbols]

 1: Shoe 1a, 1b: Dovetail groove 2: Slide plate 2a, 2b: Rib 11: Driving lever 12: Driving spring 14: Pressing member 14a: Pressing portion 16: Auxiliary lever 17: Auxiliary spring 18: Detent member 18b: Wedge Surface 20: Lock lever 21: Lock spring 22: Locking lever 25: Lock release pin 26: Release member

Claims (2)

[Claims] 1. A quick shoe comprising a shoe fixed to a head of a tripod and a slide plate fixed to a bottom portion of a camera and removably inserted into a pair of dovetail grooves of the shoe. A pressing member that is urged in a direction that is orthogonal to the dovetail groove and that is pressed in one direction, and a wedge-shaped member that is urged in a direction that is inserted between the pressing member and the shoe fixing portion and that prevents the pressing member from returning. A quick shoe comprising a detent member, and a release member for driving the pressing member and the detent member to a stored position against the respective urging forces. 2. The quick shoe according to claim 1, wherein the releasing member drives the detent member to the energy storing position prior to driving the pressing member to the energy storing position.