JPH0272297A - Pedestal - Google Patents

Abstract

PURPOSE:To perform the action of vanning and tilting by a single motor by performing the vanning action by means of simultaneously rotating a rotary unit and a rotatary shaft while the tilting action by means of rotating only the rotary unit. CONSTITUTION:In a pedestal 1, when rotation of a rotary unit 43 is transmitted to a rotary shaft 37 through transmitting means 39, 55, 58, the rotary shaft 37 and a camera mounting bed 59, supported to this rotary shaft 37, are rotated integrally with the rotary unit 43, performing vanning action, while by a release means 24, when no rotation is transmitted of the rotary unit 43 to the rotary shaft 37, only the rotary unit 43 rotates moving a contact position of its cam surface 50 with the camera mounting bed 59 and vertically moving its both end parts, and the camera mounting bed 59 is moved tilting, thus performing tilting action. Thus enabling the action to be performed of vanning and tilting by a single motor 12, the universal head 1 can be constituted by a low cost.

Description

[Detailed description of the invention] The pan head of the present invention will be explained according to the following items.

A. Industrial field of application B0 Overview of the invention C9 Prior art [Fig. 12] D6 Problem to be solved by the invention [Fig. 12] E0 Means for solving the problem F. Examples [Figs. [Figure 11] F-1, First embodiment [Figures 1 to 7] a, Base part [Figures 1 to 4, Figure 7] a-1, Base, chassis, support shaft a-2, drive mechanism a-3, brake means a-4, connectors, etc. [Figures 1, 3, 4, 7] 59 Rotating shaft, clutch member [Figures 1 to 3, [Fig. 5] C9 rotating body [Fig. 1, Fig. 2, Fig. 5 to Fig. 7] d. Camera mounting base [Fig. 1, Fig. 2, Fig. 5, Fig. 7] e. Banning; Tilting F-2, second embodiment [Figs. 8 to 11] a. Overview [Fig. 8] b. Cam section [Figs. 8 and 9 C9 control mechanism [Figs. 8 to 11] Figure 11] c-1, Structure G1 Effects of the Invention (A, Industrial Application Field) The present invention relates to a novel pan head. Specifically, it relates to an electric tripod head, that is, a tripod head that performs bunning and tailing using the driving force of a motor.Bunning and tilting can be performed by a single motor, and the rotation angle of bunning can be adjusted. It is an object of the present invention to provide a novel pan head which is free from any restrictions and allows smooth bunning and tilting.

(B. Summary of the Invention) The pan head of the present invention is an electric pan head, and includes a cam surface whose height changes continuously on the upper surface of a rotating body rotatably supported by a base, and When performing vanning, a driving means for rotating the rotating body is provided on the base, and the camera mounting base is rotatably supported with respect to the rotating body in a state in which the camera mount is always in contact with the cam surface and is coaxial with the rotating body. The camera mount is rotated integrally with the rotating body, and when performing tilting, only the rotating body is rotated. This makes it possible to perform both vanning and tilting with a single motor, and also to reduce the amount of vanning. The rotation angle is not restricted in any way, and bunning and tilting can be performed smoothly.

(C, Prior Art) [Figure 12] One of the camera holding tools is a pan head, and the pan head is usually a base part fixed to a support such as a tripod, and a camera that can be detachably attached to the base part. The camera mount includes a camera mounting section to be mounted, a banning mechanism, that is, a mechanism for rotating the camera mounting section in a horizontal direction, and a tilting mechanism, that is, a mechanism for tilting the camera mounting section in a substantially vertical direction.

Among these pan heads, there are so-called electric ones,
That is, there is a device in which the above-mentioned bunning and tilting are performed by the driving force of a motor.

FIG. 11 shows an example a of a conventional electric pan head.

In the figure, b is a base, C is a support shaft erected from the base, d is a fixed gear whose center is fixed to the upper end of the support shaft C, and e is rotatable on the support shaft C. It is a substantially box-shaped rotating body supported by a rotating body, and support pieces f, f (only one piece is shown in the drawing) are provided protruding from substantially the center of both sides of the body in the front-rear direction. A vanning motor g and a tilting motor h are fixed inside the rotating body e, and gears i and j are respectively fixed to the rotating shafts of these motors g and h. Gear i of No. 1 is meshed with the fixed gear d. k is a camera mounting stand, and its two leg pieces 2 and IL (only one is shown in the drawing) are supported by support pieces f, f of a rotary body e so as to be tiltable in the front and back direction; Leg piece ℃
An arc gear m is formed on the lower end surface of the motor, and this arc gear m is in row engagement with a second gear j provided on a tilting motor h. n is a connection cord having a plug 0 that is detachably connected to a connector (not shown) disposed inside the rotating body e, and one end of which is connected to a remote controller (not shown).

When the first gear i is rotated by the vanning motor g, the first gear i revolves around the axis of the fixed gear d, thereby causing the rotating body e and the camera mount k to rotate.
are integrally rotated in the horizontal direction to perform bunning, and when the second gear j is rotated by the tailing motor k, the fidget will send the arc gear m, so the camera mount k or tilting in the front and rear directions, and tailing is performed.

(D. Problems to be Solved by the Invention) [Fig. 12] However, such a conventional pan head a has various problems.

In other words, two motors are required, motor g for vanning and motor h for tailing, which increases cost and weight, and when these two motors are driven at the same time, their operation noise increases. The problem is that it is quite expensive. In particular, in the case of a video camera, since sound recording is performed at the same time as photographing, there is a problem in that when such a pan head a is used for photographing, the operating sound is recorded as harsh noise.

Furthermore, since the rotating body e is provided with driving means for moving the rotating body e and the camera mount k, such as the motors g and h and the gear 11j, one end of the connection cord n is connected to the rotating body e. The connection code n is connected when the rotating body e rotates, that is,
When bunning is performed, it is forced to wrap around the rotating body e, the base, or a support such as a tripod that supports the pan head a, and therefore it is difficult to take a large rotation angle during bunning. However, the banning rotation angle in this type of outdoor stand is, for example, approximately 100° to 150° at the center angle, which poses a problem of poor usability.

In this pan head a, when the camera mount k is tilted, the load due to the weight of the camera attached to it, that is,
The moment generated when the center of gravity of the camera deviates from the center of the camera mount is applied to the tailing motor h via the arc gear m and the second gear j, and this load increases the tilt of the camera mount. As a result, the power consumption of the motor h increases and tailing becomes less smooth.

(E. Means for Solving the Problems) Therefore, in order to solve the above problems, the pan head of the present invention has a cam surface that extends in a substantially circular endless shape when viewed from above and whose height changes continuously. A rotating body having a rotating body and a rotating shaft whose upper end protrudes upward from the rotating body and is coaxial with the rotating body are rotatably supported on a base, and a camera mount whose both ends are in contact with the cam surface is attached to the upper end of the rotating shaft. The base is provided with a motor for rotating the rotating body, a transmission means for transmitting the rotation of the rotating body to the rotating shaft, and a release means for canceling the transmission. It is.

Therefore, according to the pan head of the present invention, if the rotation of the rotating body is transmitted to the rotating shaft by the transmission means, the rotating shaft and the camera mount supported by the rotating shaft rotate integrally with the rotating body to perform bunning. In addition, if the rotation of the rotating body is not transmitted to the rotating shaft by the release means, only the rotating body will rotate, and the contact position of the cam surface of the rotating body with the camera mount will shift, causing both ends of the camera mount to be moved. moves up and down, the camera mount is tilted, and tailing is performed by this, so one motor can perform bunning and tailing, and two motors for bunting and tilting can be used. It can be constructed at a lower cost and lighter in weight than the conventional pan head used, and one end of the connection cord for power supply, connection, etc. is connected to the base where the motor is installed, In other words, since it is connected to a member that does not move even when bunning or tailing is performed, the rotation angle of the rotating body is not restricted. Moreover, the camera mount is always supported by the rotating body at two points, and this The support state does not change in any way even if the attitude of the camera mount with respect to the rotating body changes, so the load on the motor does not increase due to an increase in the tilt of the camera mount, and stable operation is always performed. be able to.

(F. Embodiment) [FIGS. 1 to 11] Details of the pan head of the present invention will be described below according to the illustrated embodiments.

In each of the illustrated embodiments, the pan head of the present invention is applied to a pan head 1 for a video camera.

(F-1, 1st embodiment) [Fig. 1 to 7 (a, base part) [Fig. 1 to 4, Fig. 7] 2 is the base part of the pan head 1. be.

(a=1. base, chassis, support shaft) 3 is a base, which has a cylindrical shape with a short axial length and whose lower surface is closed, and a plug insertion opening 4a is formed in its peripheral wall 4. There is.

Reference numeral 5 denotes a chassis, which has a circular shape whose outer shape when viewed from above is slightly smaller than the size when viewed from above the base 3, and a stepped portion slightly higher than the peripheral wall 4 of the base 30 is formed at a position slightly offset from the center of the chassis. It is bent into a crank shape when viewed from the side.
The upper piece 5a, that is, the chassis 5 seen from above at a position near the stepped wall 5b of the abbreviated part when seen from above.
A circular hole 6 is formed in the center. In such a chassis 5, the lower piece 5C is fixed to the upper surface of the bottom plate 7 of the base 3 with screws, and the upper piece 5a is mounted at a position slightly higher than the upper surface of the base 3 via a support 8.8. and is fixed to the bottom plate 7.

9 is a cylindrical boss shaft that is long in the vertical direction, and is attached to the base 3.
A mounting portion 9a is arranged so as to protrude upward from the center of the bottom plate 7, and protrudes laterally from the lower end thereof.
is fixed to the bottom plate 7, and its upper part projects upward through the hole 6 formed in the chassis 5. The hole 10 of the boss shaft 9 has a lower end 10a formed into a screw hole, and a portion 10b immediately above the screw hole tOa (hereinafter referred to as
It is called the "screw placement section." ) is formed to have a slightly smaller diameter than the other parts, and an insertion hole 7a coaxial with the boss @9 is formed in the center of the bottom 1fi, 7.

The pan head 1 is attached to a tripod or the like by, for example, screwing a camera attachment screw provided on the tripod or the like into the screw hole 10a.

(a-2, drive mechanism) 11 is a driving means provided on the base 3.

12 is a motor disposed between the bottom plate 7 of the base 3 and the upper piece 5a of the chassis 5, and 13 is a drive pulley fixed to the upper end of the rotating shaft 12a of the motor 12 that protrudes upward from the upper chassis piece 5a. , 14 is a worm shaft rotatably supported by a bearing 15 fixed to the upper piece 5a and a bearing (not shown) fixed to the bottom plate 7, and 16 is a worm shaft supported from the upper piece 5a of the ohm shaft 14. The first worm gear 17 is fixed to the lower part in an externally fitted manner, and numeral 17 is the upper piece 5a of the worm shaft 14.
This is a driven pulley fixed to an upper end projecting upward from the driven pulley 17, and an endless transmission belt 18 is passed between the driven pulley 17 and the driving pulley 13. Also, 1
Reference numeral 9 denotes a second support member (not shown) fixed to the bottom plate 7 of the base 3, which is supported so that its axial direction extends along the horizontal direction.
A first worm wheel 20 is coaxial with the second worm gear 19 and is coupled to rotate integrally therewith, and is meshed with the first worm gear 16. A first ohm wheel 21 is connected to the bottom plate 7 and the top. A rotating shaft 22 is fixed to the upper piece 5a of the rotating shaft 21 and is rotatably supported by a bearing (not shown) located near the peripheral wall 4 of the base 3. and the second
This is a second ohm wheel that meshes with the second ohm gear 19, and a drive gear 23 for rotating a rotating body, which will be described later, is fixed to a portion of the rotating shaft 21 that protrudes upward from the upper piece 5a.

Therefore, when the rotating shaft 12a of the motor 12 rotates, the rotation is caused by the following: drive pulley 13 - transmission belt 18 - driven pulley 17 - first worm gear 16 - first worm wheel 20 - second ohm gear 19 - The deceleration is transmitted to the drive gear 2 through a path called the second universal wheel 22.
3 will be rotated.

(a-3, Brake Means) 24 is a brake means for preventing the rotation of the rotating body, which will be described later, from being transmitted to the rotating shaft.

Reference numeral 25 designates an arm support frame, the main part 26 of which has a substantially U-shape with an upward opening when viewed in the direction shown in FIG.
One side 26a of 6b, that is, the upper end of the taller wall 26a, is bent in the opposite direction to the other wall 26b, and this bent portion forms the step of the upper piece 5a of the chassis 5. It is fixed to the end part on the wall 5b side, and also the one wall part 26
Support pieces 27 are extended from both side edges of a toward the other wall portion 26b.
．． 27 are provided in a protruding manner, and both ends of an arm support shaft 28 are supported at the upper ends of these support pieces 27 and 27.

Reference numeral 29 denotes an electromagnetic plunger of an excitation attraction type, which is fixed to the upper surface of the bottom plate 26c of the arm support frame 25. Reference numeral 30 denotes a rod of the electromagnetic plunger 29, and the electromagnetic plunger 29 is arranged such that the tip end 30a of the rod 30 faces one wall 26a of the arm support frame 25.

Reference numeral 31 designates a brake arm, which is formed into a substantially rectangular plate shape that is elongated in the vertical direction, and protruding pieces 32.32 are provided protruding from the intermediate portions of both side edges, and these protruding pieces 32.32 are attached to the arm support shaft. The arm support frame 25 is rotatably supported by the spring hook 31a and the arm support frame 25, whose lower end is rotatably connected to the tip 30a of the rod 30 of the electromagnetic plunger 29, and is formed near the upper end. The other wall portion 28 of
A tension spring 33 is installed between the upper end of The upper end of the brake arm 31 is located at a slightly higher position than the upper end surface of the boss 4td+9, and a small engaging pawl 31b projects from the approximate center of the upper end toward the axis of the boss shaft 9. is formed. Note that this engaging claw 31b has a substantially triangular shape when viewed from above.

Reference numeral 34 designates a stopper bin that projects from a position lower than the arm support shaft 28 on one wall 26a of the arm support frame 25 toward the brake arm 31 side.

Therefore, the brake arm 31 has a tension spring 33
Due to the tensile force of
9 is not energized, its lower end comes into contact with the stopper pin 34, so that it is in a position slightly tilted with respect to the vertical direction as shown by the solid line in FIG.
(hereinafter referred to as the "disengaged position").

In addition to the above-mentioned configuration, the brake means 24 includes a clutch member to be described later.

(a-4, connectors, etc.) [Fig. 1, Fig. 3, Fig. 4, Fig. 7] 35 is a connector fixed inside the base 3, and its front surface is attached to the peripheral wall 4 of the base 3. The plug insertion hole 4 formed
The motor 12 is disposed close to and facing the motor 12
and the electromagnetic plunger 29, and one end of which is connected to a remote controller (not shown).
A plug 36a (see figure) is removably connected thereto.

(b, rotating shaft, clutch member) [Figs. 1 to 3, and 5] 37 is a rotating shaft for supporting a camera mount, which will be described later.

The rotating shaft 37 has a cylindrical shape with a length approximately twice as long as the height of the base 3, and a flange 37a is formed near the upper end of the rotating shaft 37, and a portion 37b (hereinafter referred to as " The flange 3 has a thickness substantially equal to the inner diameter of the hole 10 of the boss shaft 9 fixed to the base 3.
The portion 37c above 7a is slightly thicker than the main portion 37b, and a screw hole 37d is formed in the lower end surface.

Reference numerals 38 and 38 designate engagement pins that are fixed so as to penetrate through the flange 37a at positions substantially opposite to each other across the axis of the flange 37a.

Reference numeral 39 denotes a clutch member, which includes a disk portion 40 having a diameter approximately half the diameter of the base 3 and a cylindrical boss portion 41 projecting upward from the center of the disk portion 40. The lower end of the hole 41 a of the boss portion 41 is open to the lower surface of the disc portion 40 . The outer circumferential surface of the disc portion 40 has approximately gear tooth-shaped engaging teeth 40a, 40a, . . .
The boss portions 41 are formed on the outer surface of the upper end portion of the boss portion 41 at positions substantially opposite to each other across the axis.
Engagement grooves 41b, 41b are formed that reach the upper end.

In addition, the height of the boss portion 4 of the clutch member 39 is rotated! 1I1
The length of the main portion 37b of 37 is approximately half that of the main portion 37b of the main portion 37b.

By placing the clutch member 39 on the upper end surface of the boss shaft 9, the hole 41a of the clutch member 39 and the hole 10 of the boss shaft 9 are communicated with each other, and the hole 41a and the hole 10 are connected to the rotating shaft 37. The main portion 37b of the rotary shaft 37 is inserted, the flange portion 37a of the rotating shaft 37 is placed on the upper end surface of the clutch member 39, and the portion of the engaging pin 38.38 that protrudes downward from the flange portion 37a is attached to the clutch member 39. The clutch member 39 and the rotating shaft 37 are configured to rotate integrally by being engaged with engagement grooves 41b, 41b formed in the boss portion 41 of the clutch member 39.

Note that the rotating shaft 37 is rotatable with respect to the boss shaft 9.

42 is a stepped screw inserted into the hole 10 of the boss @ 9 from below, the intermediate part of which is inserted through the screw arrangement part 10b of the hole 10, and the screw shaft part is screwed into the screw hole 37d of the rotating shaft 37. This prevents the rotary shaft 37 from coming off the boss @9, and by preventing the clutch member 39 from coming off the flange 37a of the rotary shaft 37 and the top of the boss shaft 9. It will be held between the end face.

In addition, when the brake arm 31 is in the non-engaging position, its engaging pawl 31b approaches and opposes the outer peripheral surface of the disk portion 40 of the clutch member 39.

(c, Rotating body) [Figures 1, 2, 5 to 7] Reference numeral 43 denotes a rotating body, which is composed of a gear portion in the shape of an internal gear and a cam portion.

Reference numeral 44 denotes a gear portion, and the gear portion 44 has an outer diameter slightly larger than the diameter of the base 3 and has a length approximately the same as the height of the base 3 in the axial direction, and the peripheral wall 45 extends from the lower end to the upper end. A shallow recess 45a is formed on the upper end surface of the gear portion 44, and gear teeth 46 are formed on the upper end of the inner peripheral surface of the peripheral wall 45.
．． 46, . . . are formed.

47 is a cam portion. The cam portion 47 is shaped like a flat cylindrical body cut so that its upper end surface is inclined.
The lower surface 48 of the cam portion 47 has a concave portion 48 having a substantially concave spherical shape.
a is formed, and the outer peripheral portion 50 of the slope 49 corresponds to the upper surface 49, that is, the surface obtained by cutting the cylindrical body diagonally.
(hereinafter referred to as the "cam surface"), the portion 51a on the taller side from the center of the portion 51 is formed into a flat surface that is substantially parallel to the surface of the lower surface 48 other than the recess 48a.

52 is a cylindrical boss located at the axial center of the cam portion 47, the upper end surface of which is at the same height as the flat surface Sla, and the lower end slightly protruding from the recess 48a of the lower surface 48. is formed.

The cam surface 50 is formed as follows.

That is, 50a is the highest part of the cam surface 50, 50b is the lowest part, and a part 50c550c (hereinafter referred to as "slope") between these two parts 50a and 50b.
is formed so that its height changes at a substantially constant rate.

This is done by placing the rotational fulcrum at the center of the rotating body 43 and
It is necessary to rotate the camera mount (described later) so that both ends are always in contact with two points that are 180 degrees apart from 0, and no matter where the camera mount is positioned relative to the rotating body 43, This is to ensure that the displacement of the tilt angle of the camera mount, that is, the tilting speed of the camera mount, remains constant when the rotating body 43 rotates by a predetermined angle.

When such a cam surface 50 is developed, the slope 50
c, 50c is an inclined straight line 5 as shown in FIG. 6(A).
It is expressed as 3.53.

In addition, if the cylindrical body is cut with a slope inclined with respect to the axis, when it is unfolded, the cutting line 53'
53' exhibits a sine curve as shown in FIG. 6(B), and it can be seen that the amount of vertical displacement of both ends of the camera mount with respect to a predetermined rotation angle differs depending on the position on the cam surface 50.

The cam portion 47 has screws 54, 54, etc. (see 1 in FIG. (Only one is shown.) is fixed to the gear part 44.

55 is a bearing body, and the disc portion 4 of the clutch member 39
0 and a cylindrical boss portion 57 that protrudes upward from the center of the disk portion 56 are integrally formed of synthetic resin. A friction plate 58 is fixed to the lower surface, and the boss portion 57 is fitted into the boss portion 52 of the cam portion 47 from below, and the disk portion 56
is fixed to the boss 52.

In such a rotating body 43, the boss portion 41 of the clutch member 39 is rotatably fitted into the boss portion 57 of the bearing body 55, and the bearing body 55 is attached to the upper surface of the disk portion 40 of the clutch member 39. By being placed on the rotary shaft 37, the drive gear 23 is rotatably supported via the clutch member 39, and the drive gear 23 is meshed with the gear teeth 46, 46, .

Thus, the rotating body 43 is positioned so as to cover the opening surface of the base 30 and is rotatably supported by the base 3, and when the drive gear 23 rotates, it is rotated in a direction corresponding to the rotation direction. It turns out. Further, the disk portion 56 of the bearing body 55 is connected to the clutch member 39 with a friction plate 58 fixed therebetween.
Since it is in contact with the zero disc portion 40, when the rotation of the rotating shaft 37 is not blocked, the rotation of the rotating body 43 is applied to the rotating shaft 37 via the contacting portion.

(d, camera mount) [Figure 1, Figure 2, Figure 5, Figure 7
Figure] 59 is a camera mount. The camera mount 59 is integrally formed with a top plate 60 having a substantially rectangular shape when viewed from above, and a short peripheral wall 61 projecting downward from the outer periphery of the top plate 60. , roller support pieces 62.62 and 62.62 are respectively formed at both ends in the longitudinal direction, and a roller support shaft 63.63 is supported in a spanning manner by these roller support pieces 62.62 and 62.62. , rollers 64.64 are rotatably supported on the roller support shafts 63.63.

65 is a camera mounting screw rotatably supported at the center of the upper plate 60, and 66 is a positioning pin provided so as to protrude from the upper surface of the upper plate 60.

The distance between the centers of the two rollers 64, 64 is approximately the same as the diameter of the outer periphery of the cam surface 50 of the rotating body 43 when viewed from above.

Reference numeral 67 denotes a mounting base support shaft, which extends in the horizontal direction and whose approximately central portion is fixed to the upper end portion 37c of the rotating shaft 37;
A width groove is formed at one end, into which a knob 68 is screwed, and a flange 67a is formed at the other end.

The camera mount 59 is detachably and tiltably attached to the mount support shaft 67.

That is, a substantially circular shape is formed on the outer surface of the circumferential wall 61 of the camera mount 59 at a substantially central portion of the peripheral wall 61 extending in the longitudinal direction.
A C-shaped recess 69.69 is formed by cutting out a portion, and O-shaped notches 69a, 69a opening downward are formed in the recess 69.69. Then, the mounting base support shaft 6 is inserted into these 0-shaped notches 69a, 69a.
7 from below and screwing in the knob 68, the small diameter portion 68a and flange 67a of the knob 68 are respectively fitted into the recesses 69 and 69, thereby preventing the knob 68 from coming off in the vertical direction. Note that when the knob 68 is pushed back (relative to the mounting base support shaft 67), the distance between the inner surface of the small diameter portion 68a of the knob 68 and the inner surface of the flange 87a is equal to the distance between the two recesses 69.
The distance between the bottom surfaces of the camera mounting base 59 is slightly larger than the distance between the bottom surfaces of the camera mounting base 69.
It is supported so that it can be tilted freely and is prevented from being pulled out.

Furthermore, when the camera mount 59 is attached to the mount support shaft 67, the two rollers 64 and 64 move against the cam surface 50 of the rotating body 43.
It is contacted by two portions located on opposite sides of the center.

(e. Panning, Tilting) Panning and tilting by the pan head 1 configured as described above are performed as follows.

In addition, 70 is a video camera, and a dovetail hole 71a and a positioning hole 71b are formed in the bottom surface of its housing 71, and a positioning pin 66 provided on the camera mount 59 is engaged with the positioning hole 71b. The camera mount 71a is mounted on the camera mount 59 by screwing the camera mount screw 65 into the mount 71a.

Therefore, when the motor 12 rotates, the rotating body 43 rotates and the rotation causes the friction plate 58 and the clutch member 3 to rotate.
It will be applied to the rotating shaft 37 through the contact portion with 9. In this case, if the electromagnetic plunger 29 is not energized, the brake arm 31 is held in the disengaged position and the rotation of the clutch member 39 is not prevented, so that the rotating shaft 37 is integrated with the rotating body 43. Therefore, the camera mount 59 and the video camera 70 attached thereto are rotated horizontally, and panning is performed.

Furthermore, when the electromagnetic plunger 29 is excited while the rotating body 43 is rotating, tilting is performed. That is, when the electromagnetic plunger 29 is excited, the rod 30 is moved to the left in FIG. 2, so the brake arm 31 is rotated clockwise in the same figure, and the engaging claw 31b is As shown by two-dot chain lines in the figure, engaging teeth 40a, 40a, . . . of the clutch member 39 are shown.
, thereby preventing the clutch member 39 and rotation shaft 37 from rotating. Therefore, in this state, the camera mount 59 does not rotate and only the rotating body 43 rotates, so the contact position of the cam surface 50 of the rotating body 43 with the rollers 64 and 64 changes, and in this case, The heights of the two positions in contact with the rollers 64 and 64 of the cam surface 50 change in opposite phases to each other, and as a result, the camera mounting base 59 is tilted integrally with the video camera 70 and tilted. ting will be carried out.

The remote controller (not shown) is equipped with two operators for panning in forward and reverse modes, and two operators for tilting in forward and reverse modes. Electromagnetic plunger 2
The motor 12 is rotated in the forward or reverse direction while the tailing lever 9 is not energized, and when the tailing operator is operated, the electromagnetic plunger 29 is energized and the motor 12 is rotated in the forward or reverse direction.

Furthermore, since the base 3 is not rotated when either panning or tilting operations are performed, the connection cord 36 does not wrap around the base 3, the rotating body 43, or the tripod, and therefore the rotating body 43 The rotation angle of the camera mount 59 is not restricted at all and can be rotated infinitely.

(F-2, Second Embodiment) [Figs. 8 to 11] Figs. 8 to 11 show a second embodiment 72 of the pan head of the present invention.

(a, Overview) [Fig. 8] Reference numeral 73 denotes a base, and 74 denotes a chassis fixed to the base 73. The base 73 is fixed to the base 73 by appropriate means so as to cover the upper opening of the base 3 at a slightly higher position. is attached to.

75 is a boss shaft provided to protrude upward from the center of the bottom plate 73a of the base 73; 76 is the upper end portion 7 of the boss shaft;
6a is a rotary shaft on which a camera mount 77 is detachably and tiltably supported, and is rotatably fitted onto the boss shaft 75, and a clutch plate 78 is mounted approximately in the middle in the axial direction. A brake drum 79 is fixedly fitted onto the lower end of each of the brake drums 79 .

Reference numeral 80 denotes a rotating body having a substantially cylindrical shape with an open bottom and short in the axial direction.
A cylindrical boss 83 is fixed to the center of the gear part 81, and a disk-shaped cam part 82 is fixed to the lower end of the boss 83. A clutch portion 83a is integrally formed, and a portion of the rotary shaft 76 above the clutch plate 78 is rotatably fitted into the boss 83, and a lower end surface of the boss 83 is attached to an upper plate 84 on the upper surface of the clutch plate 78. By being sandwiched and placed, the boss shaft 7
5 is rotatably supported.

The base 73 has one motor and m! ! A drive mechanism (not shown) equipped with l gears is provided, and the drive gears are gear teeth 81a, 81a, formed on the inner peripheral surface of the gear portion 81.
..., and when the drive gear rotates, the rotating body 80 is rotated.

Further, 85 is a control mechanism, and the rotation of the rotating body 80 is controlled by the clutch plate 78 and the clutch portion 83a.
The control mechanism 85 transmits the signal to the rotating shaft 76 while being integrally connected to the rotating shaft 76 by the control mechanism 85 .

Note that a roller (not shown) supported by the camera mount 77 is in contact with the upper edge 82a of the cam portion 82, that is, the cam edge whose height changes continuously at a substantially constant rate.

Thus, panning is performed when the rotating body 80 and the rotating shaft 76 rotate integrally, and tilting is performed when only the rotating body 80 rotates while the rotating shaft 76 is prevented from rotating. .

(b, Cam portion) [FIGS. 8 and 9] The cam portion 82 is formed by cutting a part of a metal cylindrical body along a plane obliquely intersecting the axis thereof.

The cam edge 82a of the cam part 82 is formed in this way, and the rate of change in height with respect to the rotation angle is not constant. However, if the overall slope of the cam 7J82a is made small, it will be easier to adjust during tilting. This has little effect on the consistency of the tilting speed of the camera mount 77, and the tilting speed appears to be constant.

(c, control mechanism) [Figures 8 to 11] (c-1, configuration) 86 is a block-shaped guide member fixed to the lower surface of the chassis 74, and a long guide member 86 is located at a position slightly offset from the center. A hole-shaped guide hole 86a is formed.

A clutch lever 188 is a brake lever formed in a shape between both arms of the clutch lever 87 and a road between the arms of the clutch lever 87. The clutch lever 87 and the brake lever 88 are arranged in the guide hole of the guide member 86, and the brake lever 88 is arranged in contact with the lower end surface of the guide member 86. The guide member 86a is integrally coupled via a connecting shaft 89 inserted through the guide member 86a, and is slidably disposed on the upper or lower surface of the guide member 86.

Then, two bottles 90, 90 and 91 are provided from the upper surface of the clutch lever 87 and the lower surface of the brake lever 88, respectively.
．． 91 is provided protrudingly, and these bins 90.90 and 91.9
1 are spaced apart in the vertical direction in the moving direction of the clutch lever 87 and the brake lever 88, that is, in the vertical direction as shown in FIG.

Further, the clutch lever 87 and the brake lever 88 are connected to each other so as to be offset in the longitudinal direction when viewed from above, and the pin 90.90 and the pin 91.91 are also connected to each other with one shoulder 87.
, 88 in the longitudinal direction (Fig. 10 (C)
), see Figure 11(C)).

92.92, . . . is a tightening member made of a material with a relatively small coefficient of friction and formed into an arc shape of approximately 90° at the center angle, and the inner arc-shaped inner surface is coated with rubber, etc. Shoes made of material with a high coefficient of friction 93.93,...
is fixed, and the clutch [7B and clutch portion 83a
It is arranged so as to face and surround the outer circumferential surface of.

94 is a clutch band, 95 is a brake band,
Both ends 94a, 94a of the clutch band 94 are respectively locked to the pins 90,90 of the clutch lever 87, and most of the other parts are connected to the four tightening members 92,92,
..., and both ends 95a, 95a of the brake band 95 are individually locked to the pins 91, 91 of the brake lever 88, and most of the other parts are It is wound around the brake drum 79.

96 is an electromagnetic attraction type electromagnetic plunger fixed to the upper surface of the chassis 74, and 96a is its rod.The tip of the rod 96a is connected to a connecting fitting 97 fixed to the upper surface of the clutch lever 87. The connecting fitting 97 is always urged by a tension spring 98 in the direction in which the rod 96a is pulled out, that is, upward in FIG. 9.

Therefore, the clutch lever 87 and the brake lever 88 are always biased upward in FIG.
When the electromagnetic plunger 96 is not energized, it is held in the position shown in the figure, and in this state, the clutch band 94 tightens the tightening members 92, 92, . . . , which tighten the clutch plate 78 and the clutch portion 83a. In addition, the brake band 95 is loosely wound around the outer peripheral surface of the brake drum 79 so as to lightly contact the outer peripheral surface of the brake drum 79. Therefore, in this state, the clutch plate 78 and the clutch portion 83a are fixed to each other so as to rotate together with the tightening members 92, 92, . . . . Further, when the clutch plate 78 and the clutch portion 83a rotate integrally, the tightening members 92, 92, . . . cross the clutch band 94 on their outer peripheral surfaces.

Therefore, when the rotating body 80 rotates from this state, the rotation of the rotating body 80 is transmitted to the rotating shaft 76, and the rotating shaft 76 is rotated integrally with the rotating body 80, thereby performing bunning.

Furthermore, when the electric plunger 96 is energized, the rod 96a moves downward in FIG. 9, so the clutch lever 87 and the brake lever 88 are moved to the positions shown in FIG. 10, and thereby, clutch band 9
4, the tightening of the tightening members 92, 92, . become. Therefore, in this state, when the rotating body 80 is rotated, the clutch plate 78 slips relative to the clutch portion 83a and the rotation of the rotating shaft 76 is blocked, so that only the rotating body 80 is rotated. Tilting is performed.

(G. Effects of the Invention) As is clear from the above description, the pan head of the present invention is rotatably supported by the base, and has a substantially circular endless shape when viewed from above and whose height continuously changes. a rotating body having a cam surface that rotates; a rotating shaft that is coaxial with the rotating body and rotatably supported on a base and whose upper end protrudes from the rotating body; a camera mount that is supported in such a manner that the cam surface is in contact with the cam surface, and a motor that is fixed to the base and that rotates the rotating body;
The rotating body is provided with a transmission means for transmitting the rotation of the rotating body to the rotating shaft, and a release means for canceling the transmission of the rotation by the transmitting means to the rotating shaft of the rotating body, and the bunning is performed by rotating the rotating body and the rotating shaft at the same time. According to the pan head of the present invention, the tilting is performed by rotating only the rotating body.According to the pan head of the present invention, if the rotation of the rotating body is transmitted to the rotating shaft by the transmission means, the rotation can be performed by rotating only the rotating body. If the shaft and the camera mount supported by the shaft rotate integrally with the rotating body to perform panning, and the rotation of the rotating body is not transmitted to the rotating shaft by the release means, only the rotating body will rotate. As a result, the contact position of the cam surface of the rotating body with the camera mount moves, causing both ends of the camera mount to move up and down, tilting the camera mount, and thereby performing tilting. Panning and tilting can be performed using a motor, and compared to conventional pan heads that use two motors for panning and tailing, they can be constructed at a lower cost and are lighter in weight. In addition, one end of the connection cord for power supply, connection, etc. is connected to the base on which the motor is installed, that is, a member that does not move even when bunning or tilting is performed, so the rotation angle of the rotating body is restricted. Moreover, the camera mount is always supported by the rotating body at two points, and this support state does not change even if the attitude of the camera mount with respect to the rotating body changes. The load on the motor does not increase due to an increase in the slope of the motor, and stable operation can always be performed.

In the second embodiment described above, the brake means is of the so-called band brake type, but if such a brake means is used, the rotating shaft can be stopped at any stepless position, and No operational noise is generated when the brake means is activated.

Further, this brake means is not limited to the structure shown in each embodiment, and may have any structure as long as it can only prevent rotation of the rotating shaft, for example, It may be of an electromagnetic attraction type.

Furthermore, in each of the above embodiments, a clutch mechanism is used as the transmission means for transmitting the rotation of the rotating body to the rotating shaft, and a brake mechanism is used as the release means for preventing the rotation of the rotating shaft. However, the rotating body and the rotating shaft can be connected to a known power transmission mechanism, for example, by meshing gears, and the meshing can be made removable to serve as a transmission means and a release means.

In the above embodiments, the pan head of the present invention was shown as being commonly used as a pan head for a video camera, but the pan head of the present invention is not limited to such general use.

[Brief explanation of the drawing]

1 to 7 show a first embodiment of the pan head of the present invention, FIG. 1 is a partially cutaway side view with a camera attached, and FIG. 2 is a section II-II of FIG. 1. FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2;
Figure 4 is a perspective view of the base, Figure 5 is an exploded perspective view of the parts outside the base, Figure 6 is a conceptual diagram of the cam surface of the rotating body, and Figure 7 is a side view showing the tilting operation. Figures 8 to 10
The figures show a second embodiment of the pan head of the present invention, in which FIG. 8 is a central vertical sectional view with some parts omitted, and FIG. 9 is a sectional view taken along line IX-IX in FIG. 8. Figure 10 (A), (B),
(C) shows the state in which tilting is performed, and (A
) is a sectional view taken along the line X (A) -X (A) in Figure 8, (B) is a sectional view taken along the line X (B) - x (C) − in Figure 10 (A)
Cross-sectional view along the X (C) line, FIGS. 11 (A), (B),
(C) shows the state in which bunning is performed, (A) is a cross-sectional view taken along the line XI (A) - XI (A) in FIG. B) Sectional view along the line, (C) is XI of Figure 11 (A) (C)
-XI (C) A sectional view taken along line C, and FIG. 12 are perspective views schematically showing an example of a conventional pan head. Explanation of symbols 1... Pan head, 3... Base, 12... Motor, 24... Release means, 37...
Rotating shaft, 39.55.58...Transmission means, 43...Rotating body, 50...Cam surface, 59...
Camera mounting stand, 72... Pan head, 73... Base,
76...Rotation shaft, 77...Camera mounting base, 78.83a, 87.92.94.96.97...Transmission means, 79.87.88.89.95.96.97... Release means, 80...Rotating body, 82a...Cam surface applicant
Yuji Komatsu, Patent Attorney for Sony Corporation
Stock] Decoy Nitsume Jisen 88 + Explosion≦, -8 /〆Ichimei

Claims (1)

[Scope of Claims] A rotating body rotatably supported on a base and having a substantially circular endless cam surface whose height changes continuously when viewed from above; a rotating shaft that is rotatably supported and has an upper end protruding from the rotating body; and a camera mounting that is supported by the upper end of the rotating shaft so as to be tiltable in a substantially seesaw shape and has both ends contacting the cam surface. a base; a motor fixed to the base for rotating the rotating body; a transmission means for transmitting the rotation of the rotating body to the rotating shaft; and a transmission means for canceling the transmission of the rotation to the rotating shaft of the rotating body by the transmitting means. A pan head comprising a release means, wherein panning is performed by simultaneously rotating the rotating body and the rotating shaft, and tilting is performed by rotating only the rotating body.