JP3529155B2 - Electric head - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an electric pan head.

[0002]

2. Description of the Related Art A conventional electric tripod head used for mounting a television camera, a spotlight, a speaker or the like and changing its direction is a base fixed to a ceiling or a wall of a building, and the base. A neck portion that is protruded from and is driven to rotate about an axis; and a swinging portion that is provided at the tip of the neck portion and that is swingably driven about an axis in a direction perpendicular to the axis of the neck. It has been known to consist of a mounting head mounted on the part. The swing unit was provided with a motor, a gear, and the like for swing-driving the head. Further, the base is provided with a motor, a gear and the like for rotating and driving the neck.

[0003]

However, in the conventional electric tripod head as described above, the motor, gears, etc. of the swinging portion cause
There is a drawback that the number of parts increases and the number of manufacturing processes increases, resulting in high cost. Further, in the case of manufacturing those having different neck lengths, it is necessary to adjust the length of the electric cord connected to the motor of the oscillating portion, which has a disadvantage of increasing the number of steps.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above drawbacks and to provide an electric pan head which can reduce the number of manufacturing steps and the cost.

[0005]

In order to achieve the above object, the present invention provides a first motor, a rotation / reciprocating motion converting mechanism for converting a rotary motion of the first motor into a reciprocating motion, and the rotation / reciprocating motion converting mechanism. A slide rod that is reciprocally driven in the longitudinal direction by a reciprocating motion converting mechanism, and a reciprocating / oscillating motion converting mechanism that converts the reciprocating motion of the slide rod into a swinging motion about an axis in a direction perpendicular to the slide rod. And a mounting head that is oscillated by the reciprocating / oscillating motion converting mechanism.

Further, the slide rod is slidably inserted, and a rotary pipe is rotatably driven around a shaft center of the slide rod by using a second motor as a power source. A pivot support member pivotably supported about an axis in a direction perpendicular to the axis of the rod is fixed to the tip of the rotary pipe.

Further, in an electric pan head having a mounting head to which a television camera or the like is fixed, a slide rod which is reciprocally driven in a longitudinal direction, a slide rod which is slidably inserted, and an axis of the slide rod. And a reciprocating support for swingably supporting the mounting head around the axis in a direction perpendicular to the axis of the slide rod at the tip of the neck, which comprises a rotating pipe that is driven to rotate around the axis. An oscillating motion converting mechanism is provided, and the mounting head is configured to be simultaneously operable for a gyrating motion around the axis of the slide rod and an oscillating motion around the axis in a direction perpendicular to the axis. .

Further, the slide rod and the rotary pipe can be selectively selected to be assembled so that the length dimension can be freely changed. Further, a circumferential groove centering on the axis of the slide rod is provided at the tip of the slide rod, and a bracket having a protrusion slidably inserted into the circumferential groove is provided on the mounting head. It was done.

[0009]

When the first motor is driven to rotate, the slide rod reciprocates by the rotation / reciprocation conversion mechanism. When the slide rod reciprocates, the mounting head oscillates by the reciprocating / oscillating motion converting mechanism. Further, when the second motor is driven to rotate, the rotary pipe, the pivot member and the mounting head rotate around the axis of the slide rod.

When the first motor and the second motor are driven to rotate at the same time, the mounting head rotates about the axis of the slide rod and, at the same time, swings about the axis in the direction perpendicular to the axis. Move.

In the case where the slide rod and the rotary pipe can be selectively selected and assembled so that the length dimension can be freely changed, parts other than the slide rod and the rotary pipe can be assembled as common parts.

A circumferential groove centered on the axis of the slide rod is provided at the tip of the slide rod, and a bracket having a projection slidably inserted into the circumferential groove is projected onto the mounting head. In the installed one, the reciprocating motion of the slide rod causes the mounting head to swing about the axis in the direction perpendicular to the axis of the slide rod, regardless of the rotational position of the rotary pipe.

[0013]

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

1 and 2 show an embodiment of an electric pan head according to the present invention. The pan head is fixed to a ceiling 30 of a building via a mounting screw 31, and the base part 1 is attached. A neck portion 2 projecting downward, a swinging portion 3 attached to a lower end portion of the neck portion 2, and a mounting head 4 attached to the swinging portion 3 and to which a television camera or the like is fixed. I have it. The mounting head 4 is configured to pivot about a vertical axis (axis L ₂ ) by a control means (not shown), and swings around a horizontal axis (axis L ₁ ). Is configured.

However, this platform has the first motor 5 and
Rotation for converting the rotational movement of the first motor 5 into reciprocating movement
The reciprocating motion converting mechanism 6, the slide rod 7 reciprocally driven in the longitudinal direction by the rotating / reciprocating motion converting mechanism 6, and the reciprocating motion of the slide rod 7 is the axis L _{1 in the} direction perpendicular to the slide rod 7. A reciprocating / swinging motion converting mechanism 8 for converting into a swinging motion around and a mounting head 4 swingably driven by the reciprocating / swinging motion converting mechanism 8 are provided. Further, the slide rod 7 is slidably inserted, and the rotary pipe 10 is driven to rotate around the axis L ₂ of the slide rod 7 by using the second motor 9 as a power source.

That is, this platform has a reciprocating / swinging motion converting mechanism 8 for swingably supporting the mounting head 4 about an axis L ₁ of the slide rod 7 at a right angle to the axis L ₂ of the slide rod 7 at the neck portion. provided in two of the tip, the mounting head 4 turning and movement of the axis L ₂ around the slide rod 7, in the oscillating motion of the shaft center L ₂ perpendicular direction axis L ₁ around, operably simultaneously It is composed. The neck 2 includes a slide rod 7 and a rotary pipe 10. Further, the swinging part 3 is composed of members constituting a reciprocating / swinging motion converting mechanism 8 which will be described in detail later.

The first motor 5 and the second motor 9 are provided in the casing 12 of the base 1. That is, the mounting frame 13 is fixed in the casing 12, and the first and second motors 5 and 9 are fixed to the mounting frame 13. As the first motor 5 and the second motor 9, it is preferable to use a stepping motor or a synchronous motor in terms of accuracy of the rotation angle, but other motors may be used.

The rotation / reciprocating motion converting mechanism 6 is rotatably pivotally attached to the mounting frame 13 via a small gear 14 fixed to the output shaft of the first motor 5 and a shaft pin 38, and meshes with the small gear 14. The large-diameter crank gear 15, the slider member 16 that reciprocates in conjunction with the rotation of the crank gear 15, and the like. A crank pin 17 is provided at an eccentric position of the crank gear 15, and the crank pin 17 is slidably inserted into a long hole 18 provided at the base end of the slider member 16.

The slide rod 7 includes a base rod 19 which is slidably inserted into the rotary pipe 10 in the longitudinal direction and a tip rod.
20 and an intermediate rod portion 21 connecting the base end rod portion 19 and the tip end rod portion 20 to each other at a predetermined interval S. Base end rod 19
The slider member 16 is integrally provided at the base end of the. Further, the base end portion and the tip end portion of the intermediate rod portion 21 are connected to the base end rod portion 19 and the tip end rod portion 20 by connecting pins 22 and 22, respectively.

Therefore, the slide rod 7 and the rotary pipe 10 are selectively selected so that the length dimension can be freely changed. That is, at the time of manufacturing, the intermediate rod portion of the slide rod 7
21 and the rotary pipe 10, a plurality of pipes having different lengths are prepared, and the intermediate rod portion 21 and the rotary pipe are provided.
Assemble by selecting 10 as an alternative. In particular, in the slide rod 7, a predetermined distance S between the base end rod portion 19 and the tip end rod portion 20.
In order that the two connecting pins 22, 22 may have different through holes, a plurality of intermediate rods 21 having different mutual dimensions are prepared.

This allows the slide rod 7 to be manufactured at the time of manufacturing.
The length dimension L of the neck portion 2 can be easily changed by using a component other than the two components (the intermediate rod portion 21) and the rotary pipe 10 as a common component.

The reciprocating / oscillating motion converting mechanism 8 is a rotary pipe.
A pivot member 11 fixed to the tip of 10 and brackets 34, 34 pivotally attached to the tip of the pivot member 11 via a shaft member 23.
A circumferential groove 24 formed at the tip of the tip rod portion 20 of the slide rod 7, a projection 25 protruding from the brackets 34 and 34 and slidably inserted into the circumferential groove 24, Composed of. That is, at the tip of the slide rod 4, a circumferential groove 24 centered on the axis L ₂ of the slide rod 4 is provided, and a projection 25 that is slidably inserted into the circumferential groove 24.
The brackets 34, 34 having the above are projected from the mounting head 4. Specifically, the front end rod portion 20 of the ride rod 7 is formed with circular flange portions 39, 40 in plan view, and the flange portions 39, 40 are formed.
A circumferential groove 24 is formed between 40.

Although the protrusion 25 is made of a pin-shaped member in the illustrated example, the protrusion 25 may be formed integrally with the bracket 34. Further, only the circumferential groove 24 may be provided at the tip of the tip rod portion 20 of the slide rod 7 without forming the collar portions 39, 40, but the projections 25, 25 are prevented from coming off from the groove 24. In view of the above, it is desirable to provide the collar portions 39 and 40.

The mounting head 4 is composed of a base plate portion 32 and knob screws 35 that are rotatably mounted on the base plate portion 32 and screwed to a television camera or the like. The brackets 34, 34 are erected parallel to each other. In this way, the shaft member 23 pivotally supports the mounting head 4 via the brackets 34, 34. That is, the mounting head 4
A pivot member 11 that pivotally supports a shaft member 23 that pivots around a shaft axis L ₁ of the slide rod 7 in a direction perpendicular to the shaft center L _2.
Is fixed to the tip of the rotary pipe 10.

The base end portion of the rotary pipe 10 is rotatably inserted into the cylindrical portion 26 formed in the casing 12 of the base portion 1. Further, a large-diameter gear 27 is fixed to the base end portion of the rotary pipe 10 so that the axes thereof coincide with each other. Thus, the rotary pipe 10 and the large-diameter gear 27 are rotatably supported by the bushes 29, 29 provided in the casing 12 about the axis L ₂ . A small-diameter gear 28 that meshes with the large-diameter gear 27 is fixed to the output shaft of the second motor 9.

As shown in FIG. 1, a small magnet 36a is fixedly embedded in an eccentric position of the large-diameter gear 27, and a hall element 37a for detecting the small magnet 36a is fixed at a position opposed to the small magnet 36a. It is provided. Similarly, crank gear
The small magnet 36b is fixed to the eccentric position of 15, and
A Hall element 37b that senses the small magnet 36b is fixedly provided at a position facing it. As a result, the rotational speeds of the large-diameter gear 27 and the crank gear 15 can be detected, and the swing of the mounting head 4 about the axis L ₁ and the axis L can be detected by a control means (not shown).
The rotation around ₂ times can be easily controlled.

With the above-mentioned structure, when the first motor 5 is driven to rotate, the rotation / reciprocating motion converting mechanism 6 is driven.
And the reciprocating / oscillating motion converting mechanism 8,
Oscillates around the horizontal axis L ₁ . In particular,
For example, as shown in FIG. 2, when the crank pin 17 protruding from the crank gear 15 is at the top dead center, the slide rod 7 is at the highest position, and the base plate portion 32 of the mounting head 4 is in the horizontal position. Is. From this state, when the first motor 5 is rotationally driven to rotate the crank gear 15 in either the left or right direction,
The crank pin 17 moves downward, and accordingly, the slider member 16 and the slide rod 7 move downward as indicated by an arrow A in FIG.

As the slide rod 7 descends, the protrusions 25 provided on the bracket 34 project in the direction of arrow B, which is the tangential direction of the circumference of the circumferential groove 24 of the slide rod 7. While sliding, it descends along an arc (indicated by arrow C) centered on the horizontal axis L ₁ . Because of this, the bracket
34 and the mounting head 4 swing around the axis L ₁ in the direction of arrow D. Therefore, the television camera or the like fixed to the mounting head 4 can be swung around the horizontal axis L ₁ .

In the rotation / reciprocating motion converting mechanism 6, the crank pin 17 protruding from the crank gear 15 at the eccentric position is
Since the slider member 16 is configured to slide while sliding in the elongated hole 18 of the slider member 16,
The rattling in the sliding direction is reduced. In particular, rattling becomes extremely small as compared with the case of using a worm and a wheel that are generally used as a mechanism for converting rotary motion into reciprocating motion. Therefore, the swing of the mounting head 4 can be precisely controlled.

When the crank pin 17 reaches the bottom dead center as shown by the phantom line in FIG. 2, the slide rod 7 is at the lowest position. Then, as shown by the phantom line in FIG. 1, the substrate portion 32 of the mounting head 4 is in the vertical posture. In addition, in the illustrated example, the swingable angle θ of the mounting head 4 is configured to be 90 °, but other than that, 90 ° <θ ≦ 130 °
It is also free to configure it to be within the range.

If the second motor 9 is driven to rotate,
The large-diameter gear 27, the rotary pipe 10, the pivotal support member 11, the brackets 34, 34, and the mounting head 4 integrally rotate about the axis L ₂ . Therefore, the television camera or the like fixed to the mounting head 4 can be swung in the range of 360 ° around the vertical axis L ₂ .

In addition to the television camera, a camera for taking a picture, an illuminator such as a spotlight or the like may be attached to the mounting head 4. Furthermore, you can freely install directional speakers, microphones, and antennas.

Further, in the illustrated example, this pan head has a case in which the base 1 is fixed to the ceiling and the neck 2 is hung down. However, in addition to this, the base 1 is fixed to the vertical wall surface and the neck is fixed. 2 may be horizontal. By doing so, the mounting head 4
Can rotate about a horizontal axis (axis L ₂ ), and can swing about an axis (axis L ₁ ) perpendicular to the horizontal axis. Further, the base portion 1 may be fixed to the floor surface or the rooftop of a building, and the neck portion 2 may have a vertical posture. By doing so, the mounting head 4 can be rotated about the vertical axis (axis L ₂ ) and the horizontal axis (axis L ₂ ).
₁ ) It is possible to swing around.

[0034]

Since the present invention is configured as described above, it has the following effects.

According to the electric pan head of the _{first aspect} , the structure for swinging the mounting head 4 around the axis L _{1 in the} direction perpendicular to the slide rod 7 becomes simple. In particular, since no motor or gear is used for the swinging portion 3 at the tip of the neck portion 2, the swinging portion 3 is simple. Further, the number of parts such as gears can be reduced, which contributes to cost reduction.

Further, the axial center of the mounting head 4 rotates pipe 10 (the axis L ₂₎ structure for pivoting around a shaft center direction perpendicular to the axis of rotation pipe 10 of the mounting head 4 (Axis The structure for swinging around the center L ₁ ) is simplified and the number of parts can be reduced. Therefore, the manufacturing cost can be reduced.

According to the electric pan head of the second aspect , the mounting head 4 is rotated around the axis (axis L ₂ ) of the rotary pipe 10 and is perpendicular to the axis of the rotary pipe 10 of the mounting head 4. The structure for simultaneously operating the swinging around the axial center (axial center L ₁ ) in the direction becomes simple and the number of parts can be reduced. Therefore, the manufacturing cost can be reduced.

According to the electric pan head of the third aspect, the length dimension of the neck portion 2 can be easily changed by only selectively selecting and assembling the slide rod 7 and the rotary pipe 10 during manufacturing. .. Therefore, parts other than the slide rod 7 and the rotary pipe 10 can be easily assembled as common parts, and the manufacturing cost is reduced.

According to the electric pan head of the fourth aspect , the
The structure of the swing motion conversion mechanism 8 can be simplified. In particular, since it is not necessary to use a gear, the number of parts can be reduced and the number of steps can be reduced, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional side view showing an embodiment of the present invention.

FIG. 2 is a sectional front view.

[Explanation of symbols]

4 Mounting Head 5 1st Motor 6 Rotation / Reciprocation Motion Conversion Mechanism 7 Slide Rod 8 Reciprocation / Rotation Motion Conversion Mechanism 9 2nd Motor 10 Rotating Pipe 11 Pivot Member 23 Shaft Member 24 Circumferential Groove 25 Projection 34 Bracket L ₁ axis L ₂ axis center

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/222 F16M 11/12 G03B 17/56

Claims (4)

(57) [Claims] 1. A first motor 5 and a rotation / reciprocating motion converting mechanism 6 for converting the rotary motion of the first motor 5 into a reciprocating motion.
And a slide rod 7 reciprocally driven in the longitudinal direction by the rotation / reciprocating motion converting mechanism 6, and a reciprocating motion of the slide rod 7 about a swing motion about an axis L _{1 in} a direction perpendicular to the slide rod 7. When the slide rod 7 is slidably inserted, the reciprocating / oscillating motion converting mechanism 8 and the mounting head 4 swingably driven by the reciprocating / oscillating motion converting mechanism 8 are provided .
Both use the second motor 9 as a power source and the axis of the slide rod 7.
A rotating pipe 10 which is driven to rotate in L ₂ around, collected the
The shaft member 23 pivotally supporting the attached head 4 is attached to the shaft of the slide rod 7.
It is pivotally supported around an axis L ₁ that is perpendicular to the center L ₂ .
An electric pan head having a pivot member 11 fixed to the tip of the rotary pipe 10 . 2. An electric pan head having a mounting head 4 to which a television camera or the like is fixed, and a slide rod 7 which is reciprocally driven in the longitudinal direction, and the slide rod 7 is slidably inserted and the slide. The rod 2 is provided with a neck portion 2 composed of a rotary pipe 10 which is driven to rotate about the axis L ₂ of the rod 7, and the mounting head 4 is attached to the tip of the neck portion 2 in a direction perpendicular to the axis L ₂ of the slide rod 7. the axis L ₁ reciprocating-swinging motion converting mechanism 8 swingably supported around provided, and pivoting movement of the axis L ₂ around the slide rod 7 the mounting head 4, the shaft center L ₂
An electric pan head, which is configured to be simultaneously operable in a swinging motion about an axis L _{1 in} a direction perpendicular to. 3. The electric pan head according to claim 1 or 2, wherein the slide rod 7 and the rotary pipe 10 can be selectively selected and assembled so that their length dimensions can be freely changed. 4. The slide rod 7 is provided at the tip of the slide rod 7.
A circumferential groove 24 centered on the axis L ₂ of
The electric pan head according to claim 1, 2 or 3 , wherein brackets ( 34) having projections (25) slidably inserted into the circumferential groove (24) are provided on the mounting head (4) in a protruding manner.