JP3391024B2 - Pan head tilt mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt mechanism of a pan head device, and more particularly to a tilt mechanism of a pan head device for tilting a camera to a desired photographing position by rotating a tilt shaft.

[0002]

2. Description of the Related Art As shown in FIG. 4, a tripod head device 1 is rotatably installed on the top of a tripod 2. A tilt mechanism of a camera 6 including a worm 4 and a worm gear 5 is provided in a casing 3 of the platform device 1, and the worm 4 is formed integrally with a tilt shaft 7 of the camera 6.
A mounting table 9 of a camera casing 8 is fixed to both ends of the tilt shaft 7. The camera casing 8 is mounted with a rotational force from the worm gear 5 via the worm 4 and the tilt shaft 7. Tilted by being transmitted to.

Therefore, the rotation direction of the worm gear 5,
By controlling the rotation amount and the rotation amount, the camera 6 can be tilted to a desired photographing position.

[0004]

However, in the tilt mechanism of the conventional pan head device in which the tilt shaft 7 is rotated by the worm mechanism, a large thrust load is generated on the tilt shaft 7 due to the structure of the worm mechanism. There is a drawback that an unnecessary load is applied to the casing 3 of the camera platform device 1. Further, the tilt mechanism of the conventional pan head device has a drawback that it takes a long time to adjust the meshing between the worm 4 and the worm gear 5.

The present invention has been made in view of the above circumstances and does not generate a thrust load on the tilt shaft.
It is an object of the present invention to provide a tilt mechanism for a tripod platform device that does not require gear mesh adjustment.

[0006]

In order to achieve the above object, the present invention rotates a tilt shaft of a camera, which is rotatably provided on a platform device, to tilt a camera to a desired photographing position. In the tilt mechanism of the pan head device, the motor
And a feed screw consisting of a screw rod, and the feed screw
The screw rod is rotated by the driving force of the motor.
And a swing arm member having one end fixed to the tilt shaft and swinging about the tilt shaft as a swing fulcrum, the other end of the swing arm member. An elongated hole is formed in either one of the portion and the nut member, and a pin that is fitted into the elongated hole is formed in the other portion to connect the swing arm member and the nut member to each other. The arm member swings in accordance with the reciprocating movement of the nut member to rotate the tilt shaft.

In order to achieve the above object, the present invention also provides a pan head device for tilting the camera to a desired photographing position by rotating a tilt shaft of a camera rotatably provided on the pan head device. In the tilt mechanism, the drive means rotatably supported by the platform device, the reciprocating member reciprocating by the drive force from the drive means, and one end fixed to the tilt shaft, the tilt shaft And a reciprocating member rotatably connected to each other by a pin connection, and the drive means is a reciprocating member. The swing arm member swings with the swing of the driving means to swing the tilt shaft.

[0008]

According to the first aspect of the present invention, when the driving means is driven to reciprocate the reciprocating member, the reciprocating member is reciprocally moved in the rocking arm member due to the coupling relationship between the pin and the elongated hole. The tilt shaft is swung to rotate the tilt shaft.
As a result, in the first aspect of the invention, as compared with the tilt mechanism of the conventional pan head device in which the tilt shaft is rotated by the worm mechanism, a thrust load is not generated on the tilt shaft, and gear mesh adjustment is unnecessary. .

According to the second aspect of the present invention, when the driving means is driven to reciprocate the reciprocating member, the driving means swings about the pin as a fulcrum with the movement of the reciprocating member, and
The swing arm member swings with the tilt shaft as a fulcrum in accordance with the swing of the driving means, and rotates the tilt shaft. As a result, similarly to the first aspect of the invention, the second aspect of the invention does not generate a thrust load on the tilt axis as compared with the tilt mechanism of the conventional pan head device in which the tilt axis is rotated by the worm mechanism. No meshing adjustment is required.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a tilt mechanism of a tripod head device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a front view including a partial cross section of a pan head device 12 to which a tilt mechanism 10 of the pan head device according to the first embodiment of the present invention is applied.

As shown in the figure, the tripod head device 12 is installed on the top of the tripod 14 so as to be rotatable, and the tripod head device 12 is provided.
A tilt mechanism 10, which will be described later, is provided in the casing 16. At both ends of the tilt shaft 18 connected to the tilt mechanism 10, the mounting table 2 of the camera casing 20 is attached.
2 is stuck. The camera casing 20 is tilted when the turning force from the tilt mechanism 10 is transmitted to the mounting table 22 via the tilt shaft 18. As a result, the camera 24 stored in the camera casing 20
Is tilted to a desired shooting position.

The tilt mechanism 10 is, as shown in FIG.
It is composed of a motor 26, a screw rod 28, a nut 30, and an L-shaped arm 32. The motor 26 is fixed in the casing 16 shown in FIG.
The left end portion 28A of the screw rod 28 is fixed to the tip portion of the. The right end portion 28B of the screw rod 28 is pivotally supported by the casing 16 shown in FIG. The screw rod 28
The nut 30 is screwed into the. This nut 3
When the screw rod 28 is rotated by the driving force from the motor 26, 0 can reciprocate in the left-right direction along the screw rod 28 by the feed screw method.

A pin 36 is planted on the side surface of the nut 30, and the pin 36 is engaged with a long hole 38 formed in the lower end portion 32A of the arm 32. The elongated hole 38 is formed along the longitudinal direction of the arm 32. An upper end portion 32B of the arm 32 is fixed to a substantially central portion of the tilt shaft 18 shown in FIG. Next, the operation of the tilt mechanism 10 of the platform device configured as described above will be described.

First, the motor 26 is driven in the normal direction to drive the screw rod 2.
When 8 is rotated in the normal direction, the nut 30 moves to the right along the screw rod 28 from the position shown by the solid line in FIG. When the nut 30 moves to the right, the pin 36 pushes the right side surface of the elongated hole 38 of the arm 32, whereby the arm 32 rotates counterclockwise about the tilt shaft 18. As a result, the tilt shaft 18 rotates in the counterclockwise direction together with the arm 32, so that the camera 24 shown in FIG.
The tilting operation can be performed at a position where the shooting position of is tilted upward.

When the camera 24 is tilted downward, the motor 26 is reversely driven to reverse the screw rod 28 and the nut 30 is moved leftward along the screw rod 28. . When the nut 30 moves to the left, the pin 36 pushes the left side surface of the elongated hole 38 of the arm 32, whereby the arm 32 rotates clockwise about the tilt shaft 18 as a fulcrum. As a result, the tilt shaft 18 rotates in the clockwise direction together with the arm 32.
The tilting operation can be performed at a position where 4 is tilted downward.

As described above, in the present embodiment, the reciprocating motion of the nut 30 by the feed screw type mechanism is converted into the swing motion by the arm 32, and this swing motion is transmitted to the tilt shaft 18 to move the tilt shaft 18. It was made to rotate. Therefore, the tilt mechanism 10 of the platform apparatus of the present embodiment does not generate a thrust load on the tilt shaft 18, as compared with the tilt mechanism of the conventional platform apparatus in which the tilt shaft is rotated by the worm mechanism. The gear mesh adjustment is also unnecessary.

FIG. 3 shows a second embodiment of the tilt mechanism 40 of the platform apparatus according to the present invention. The same or similar members as those in the first embodiment are designated by the same reference numerals, and their description will be omitted. Omit it. In the tilt mechanism 40 shown in the second embodiment, the motor 26 is rotatably supported by the casing 16 by the pin 42, and the screw rod 28 is cantilevered by the spindle 34 of the motor 26. The lower end 32A of the arm 32 is rotatably supported by the pin 36 of the nut 30.

According to the second embodiment thus constructed, when the motor 26 is normally driven to normally rotate the screw rod 28, the motor 26 and the screw rod 28 are moved in accordance with the rightward movement of the nut 30. 28 rotates counterclockwise around the pin 42 as a fulcrum. As a result, the arm 32 rotates counterclockwise around the tilt shaft 18 as a fulcrum, and the tilt shaft 18 rotates counterclockwise together with the arm 32, so that the photographing position of the camera 24 shown in FIG. The tilting operation can be performed at the position tilted to.

Further, the motor 26 is reversely driven to drive the screw rod 2
When 8 is reversed, the motor 26 and the screw rod 28 rotate clockwise with the pin 42 as a fulcrum as the nut 30 moves to the left. As a result, the arm 32 rotates in the clockwise direction with the tilt shaft 18 as the fulcrum, and the tilt shaft 18 rotates in the clockwise direction together with the arm 32, so that the photographing position of the camera 24 is tilted downward. It can be operated.

Therefore, also in the second embodiment, as compared with the tilt mechanism of the conventional pan head device in which the tilt shaft is rotated by the worm mechanism, no thrust load is generated on the tilt shaft 18,
In addition, gear mesh adjustment is not necessary. Further, in this embodiment, since the feed screw method is applied as the tilt mechanism, the tilt shaft 18 can be self-locked like the conventional worm mechanism, and the machining is easier than the conventional worm mechanism.

In this embodiment, the motor 26 and the screw rod 28 are used as the driving means, and the nut 30 is used as the reciprocating member. However, the present invention is not limited to this, and other driving means and reciprocating members are used. A member may be used.

[0022]

As described above, according to the tilt mechanism of the platform apparatus according to the first aspect of the present invention, when the driving means is driven to reciprocate the reciprocating member, the rocking arm member is extended with the pin. The tilt shaft rotates by swinging about the tilt shaft as a fulcrum with the reciprocating movement of the reciprocating member due to the connection with the hole. Therefore, the tilt of the conventional platform device that rotates the tilt shaft by the worm mechanism is used. Compared to the mechanism, no thrust load is generated on the tilt shaft, and gear mesh adjustment is not necessary.

Further, according to the tilt mechanism of the platform apparatus according to the second aspect of the present invention, when the driving means is driven to reciprocate the reciprocating member, the driving means moves the pin as the reciprocating member moves. The tilt shaft is pivoted by the pivot arm and the pivot arm member is pivoted by the tilt shaft as the drive means is pivoted. As a result, the tilt shaft is pivoted, so that the tilt shaft is pivoted by the worm mechanism. As compared with the tilt mechanism of the conventional platform device, no thrust load is generated on the tilt shaft, and gear mesh adjustment is not necessary.

[Brief description of drawings]

FIG. 1 is an explanatory view of a pan head device provided with a tilt mechanism of the pan head device according to the present invention.

FIG. 2 is a structural diagram showing a first embodiment of a tilt mechanism of a platform device according to the present invention.

FIG. 3 is a structural diagram showing a second embodiment of the tilt mechanism of the platform device according to the present invention.

FIG. 4 is an explanatory diagram of a pan head device provided with a tilt mechanism of a conventional pan head device.

[Explanation of symbols]

10, 40 ... Tilt mechanism 12 ... Platform device 16 ... Casing 18 ... Tilt axis 24 ... Camera 26 ... Motor 28 ... screw rod 30 ... Nut 32 ... Arm 36 ... pin 38 ... long hole

Claims (2)

(57) [Claims] 1. A tilt mechanism of a pan / tilt head device for tilting the camera to a desired photographing position by rotating a tilt shaft of a camera rotatably mounted on the pan / tilt head device, wherein a motor and a screw rod are provided. Screwed to the screw rod of the feed screw and driving the motor.
When the screw rod is rotated by power, it moves back and forth along the screw rod.
A nut member, and a swing arm member having one end fixed to the tilt shaft and rotating about the tilt shaft as a swing fulcrum. The other end portion of the swing arm member and the nut portion
The either one of the wood with the long hole is formed, and the swinging arm member and the nut member is formed with a pin which is fitted into the long hole is connected to the other, rocking arm member nut
A tilt mechanism for a pan head device, wherein the tilt shaft pivots by swinging with the reciprocating movement of the lever member . 2. A tilt mechanism of a pan head device, wherein a tilt shaft of a camera rotatably provided on the pan head device is pivoted to tilt a camera to a desired photographing position. A drive unit that is swingably supported, a reciprocating member that reciprocates by a driving force from the drive unit, and a swing arm member that has one end fixed to the tilt shaft and that rotates using the tilt shaft as a swing fulcrum. The other end of the swing arm member and the reciprocating member are rotatably connected by a pin connection, and the driving means swings as the reciprocating member moves and swings. A tilt mechanism of a pan head device, wherein the arm member swings with the swing of the driving means to rotate the tilt shaft.