JP2589257Y2 - Video editing device rotary operation device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary operation device used for controlling a reproduction speed of a video editing device.

[0002]

2. Description of the Related Art Conventionally, in a video editing apparatus, a rotary operation device has been used to adjust a reproduction speed of a video signal recorded on a video tape. In this video editing apparatus, the playback speed can be changed continuously and steplessly by using a rotary operation device.

[0003] As this kind of rotary operation device, Japanese Patent Application Laid-Open No.
Japanese Patent Application Publication No. 36138 discloses a technology disclosed in Japanese Patent Application Laid-Open No. 36138/1990. As shown in FIGS. 5 and 6, the rotary operation device described in this publication includes a support side plate 101, a lower support plate 10.
5 and an upper support plate 108.
In this support, a support member 103 is attached to a side plate 101 by a set screw 102, a lower support plate 105 is attached to the support member 103, and a plurality of support columns 107 are attached to the lower support plate 105. An upper support plate 108 is attached. Each support column 107
It is attached to the lower support plate 105 by a set screw 106. Then, the lower and upper support plates 105,
108 are parallel to each other.

[0004] Through holes are provided at the center of each of the support plates 105 and 108. The lower end of the rotating shaft 111 is inserted through a through hole at the center of the lower support plate 105 via a lower bearing 110 and is rotatably supported. Further, the upper end side of the rotating shaft 111 is inserted through a through hole at the center of the upper support plate 108 via a bearing 109 and is rotatably supported. At the lower end of the rotating shaft 111, a rotation detecting magnet disk 113 is attached by a stop screw 112. Further, a rotation operation plate 118 is attached to the upper end of the rotation shaft 111 by a stop screw 114. The rotation operation plate 118 forms a rotation operation unit together with a handle 119 fitted and attached so as to cover the rotation operation plate 118. A substantially disk-shaped clutch plate 122 is fitted to a central portion of the rotating shaft 111 in the axial direction, and is fixed and attached by a stopper screw 123. This clutch plate 122 is formed of a magnetic material.

The rotation operating plate 118, the grip 119, the rotation detecting magnet disk 113, and the clutch plate 122, which are integrally attached to the rotating shaft 111,
The rotation is performed integrally by gripping and rotating the grip 19. On the lower surface side of the upper support plate 108, the clutch plate 1
A clutch coil 1 comprising an annular yoke member and a coil wound around the yoke member so as to face the clutch coil 22.
34 are attached. This clutch coil 134
The yoke member has its outer peripheral portion approaching and facing the clutch plate 122.

A stopper plate 121 is rotatably inserted into and supported by the rotation shaft 111 below the clutch plate 122, that is, between the clutch plate 122 and the lower support plate 105. The stopper plate 121 and the clutch plate 1
A leaf spring 124 whose base end is supported by the stopper plate 121 and whose distal end is close to the clutch plate 122 is disposed between the spring 22 and the base plate 22. The rotation range of the stopper plate 121 with respect to the support plates 105 and 108 is regulated by a stopper member (not shown). This stopper plate 121
The optical detection device 125 detects the neutral position within the rotatable rotation range.

A rotation detecting device 129 is provided to face the outer peripheral edge of the rotation detecting magnet disk 113. The rotation detecting device 129 is attached to the support member 103 and faces the outer peripheral edge of the rotation detecting magnet disk 113. The rotation angle and rotation speed of the rotation detection magnet plate 113 are converted into electric signals by a rotation detection device 129 and sent to an electronic device such as a video editing device.

[0008] In the rotary operation device configured as described above, the rotation detecting magnet disk 113 is rotated by rotating the grip portion 119. At this time, if the clutch coil 134 is in the non-energized state, the clutch plate 122 is not magnetized, and the clutch plate 122 and the stopper plate 121 are in a state where they can rotate with each other. Therefore, the rotation detecting magnet disk 113 is
1 and the clutch plate 122 and the like can be continuously rotated.

In this rotary operating device, when the clutch coil 134 is energized, the clutch plate 122 is magnetized, the stopper plate 121 is attracted to the clutch plate 122, and the rotation with respect to the clutch plate 122 is prevented. Therefore, the rotation detecting magnet disk 113 can rotate only within the rotation angle range in which the stopper plate 121 is restricted by the stopper member together with the clutch plate 122 and the like, and the rotation in the range beyond this rotation angle range is possible. Be regulated.

[0010]

By the way, in the above-described rotary operating device, when the clutch coil 134 is in the energized state and the rotation of the stopper plate 121 is restricted by the stopper member, the rotary operating portion is further moved. If the rotation operation is performed, there is a possibility that the rotation operation portion and the like may be damaged.

In other words, if the rotation of the stopper plate 121 is stopped, and the rotation of the stopper plate 121 is further attempted via the rotation operating portion, the rotating shaft 111 and the clutch plate 122, the grip portion 119 and the rotation operation plate are rotated. Excessive rotational torque is applied to the joint with the rotating shaft 118, the attachment of the rotation operation plate 118 to the rotation shaft 111, the attachment of the clutch plate 122 to the rotation shaft 111, and the like. , 123 and damage to the rotating shaft 111 may occur. When the stop screws 114 and 123 are loosened, the rotation of the rotary operation unit is not accurately transmitted to the rotation detecting magnet plate 113, and the rotation operation amount cannot be accurately detected.

At this time, the clutch coil 134,
Since the clutch plate 122 and the stopper plate 121 are slid while being attracted to each other, the sliding contact surface between them may be damaged. When the opposing portion between the clutch plate 122 and the stopper plate 121 is damaged, when the clutch coil 134 is energized, the stopper plate 1
As a result, the clutch 21 cannot be reliably sucked by the clutch plate 122, and the rotation range of the rotating operation unit cannot be regulated accurately.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and in a state where the rotation range of the rotary operation unit is restricted and the rotation of the rotary operation unit is prevented, the rotary operation unit is proposed. Even if excessive torque is applied to the
An object of the present invention is to provide a rotary operation device that is prevented from being damaged and can maintain an accurate operation state.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the above-mentioned object, a rotating operation device of a video editing device according to the present invention comprises a first rotatably supported rotating device. Body and
A rotation detecting means for generating a rotation detection signal in accordance with the rotation of the first rotator; a second rotator supported rotatably coaxially with the first rotator; A clutch mechanism for connecting or separating the second rotating body;
An arm provided on the rotating body, a rotation angle regulating member for regulating a rotating angle of the second rotating body via the arm, and an arm facing the first rotating body. A rotation operation unit configured to rotate the first rotatable body rotatably supported, wherein the first rotation body and the rotation operation unit are arranged on the upper side.
The torque limiter mechanism includes a sphere urged by an urging member disposed on the first rotating body side and a plurality of engagement holes formed in the rotation operation portion and selectively engaging the sphere. Are connected via

[0015]

In the rotary operation device according to the present invention, the first rotation control device is rotatably supported and its rotation is detected by the rotation detecting means.
Is connected to a rotation operation unit via a torque limiter mechanism, and is rotated by rotating the rotation operation unit. Therefore, the second rotation body rotatably supported serves as a clutch mechanism. When the second rotating body is prevented from rotating by the rotation angle regulating member via an arm provided on the second rotating body. , Even if the rotation operation part is rotated,
The transmission of excessive torque is cut off by the torque limiter mechanism, so that the torque is not rotated, and the torque is not transmitted to the clutch mechanism or the second rotating body.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings. The rotary operation device according to the present invention is used, for example, in a video editing device, and is used when performing an input operation of continuously changing information or the like.

As shown in FIGS. 1 to 3, the rotary operating device includes a supporting body including a supporting side plate 1, a lower supporting plate 5, and an upper supporting plate 8. In this support, a support member 3 is attached to a support side plate 1 by a set screw 2, a lower support plate 5 is attached to the support member 3, and a plurality of support columns 7 are attached to the lower support plate 5. The upper support plate 8 is attached. Each support column 7 is attached to the lower support plate 5 with a set screw 6. The lower and upper support plates 5 and 8 are respectively substantially perpendicular to the support side plate 1 and are parallel to each other.

A through hole is provided in the center of each of the support plates 5 and 8. The lower end of a columnar rotating shaft 11 constituting the first rotating body is inserted through a through hole in the center of the lower support plate 5 via a lower bearing 10 and is rotatably supported. The upper end of the rotating shaft 11 is inserted through a through hole at the center of the upper support plate 8 via a bearing 9 and is rotatably supported.

At the lower end of the rotating shaft 11, a rotation detecting magnet disk 13 constituting a first rotating body is attached by a stop screw 12. Also, this rotating shaft 1
A substantially disk-shaped rotation operation transmitting member 15 is fitted in the vicinity of the upper end side of 1, and is supported by a stopper screw 14.
A substantially disk-shaped clutch plate 22 is fitted to the center of the rotating shaft 11 and fixed by a stopper screw 23. This clutch plate 22 is formed of a magnetic material.

The rotation operation transmitting member 15, the rotation detecting magnet disk 13 and the clutch plate 22 integrally attached to the rotating shaft 11 constitute a first rotating body. A plurality of spring balls 16 constituting a torque limiter mechanism are attached to the rotation operation transmitting member 15. As shown in FIG. 4, the spring balls 16 have a steel ball 30 housed in a cylindrical support cylinder 31 and a compression coil spring between the steel ball 30 and a bottom plate 33 closing the lower end of the support cylinder 31. 32 are arranged in a compressed state. The upper end side of the support cylinder 31 is opened and provided with an inner flange portion 31 a to form a circular opening having a diameter slightly smaller than the diameter of the steel ball 30. A part of the steel ball 30 faces outward through a circular opening on the upper end side of the support cylinder 31, and is urged by a compression coil spring 32 in a direction to protrude upward.

These spring balls 16 are made of steel balls 30
The upper end of the support cylinder 31 facing the outer side faces the rotation operation transmitting member 15 and is fitted to a fitting hole formed in the rotation operation transmitting member 15. These spring balls 16 rotate 120 ° around the rotation axis 11 in the circumferential direction.
It is arranged at intervals.

At the upper end of the rotating shaft 11, a disk-shaped rotating operation plate 18 is mounted rotatably with respect to the rotating shaft 11 by a stop screw 20. This rotary operation plate 1
Numeral 8 is opposed to the upper surface of the rotation operation transmitting member 15 at a predetermined interval. As shown in FIG. 2, a plurality of ball engaging holes 17 are formed on the rotation operation plate 18 so that the center of the rotation shaft 11 is formed on a circle having the same diameter as a circle passing through the center of each steel ball 30 of each spring ball 16. 30 ° in the circumferential direction
Are arranged at equal intervals. The upper ends of the steel balls 30 of the spring balls 16 are engaged with the ball engaging holes 17 by receiving the urging force of the compression coil spring 32. The rotation operation plate 18 constitutes a rotation operation unit together with a handle 19 attached to be fitted to the rotation operation plate 18.

On the lower surface side of the upper support plate 8, the clutch plate 2
A clutch coil 34, which comprises a toroidal yoke member and a coil wound around the yoke member and constitutes a clutch mechanism, is mounted so as to oppose the clutch coil 34. The outer periphery of the yoke member of the clutch coil 34 is opposed to the clutch plate 22 so as to approach the clutch plate 22.

A stopper plate 21 serving as a second rotating body is rotatably supported on the rotating shaft 11 below the clutch plate 22, that is, between the clutch plate 22 and the lower supporting plate 5. ing. A leaf spring 24 is provided between the stopper plate 21 and the clutch plate 22, the base end of which is supported by the stopper plate 21 and the distal end of which is close to the clutch plate 22. This stopper plate 21, as shown in FIG.
An arm 28 is provided. The arm portion 28 is formed so as to protrude from the stopper plate 21 to the outer peripheral side, and the distal end side is formed of a buffer material such as rubber. This stopper plate 21
The first and second stopper portions 26 and 27 formed on the lower support plate 5 and serving as rotation restricting members are brought into contact with the arm portions 28, so that the rotation ranges of the support plates 5 and 8 are exceeded. Rotation is regulated. The optical detection device 25 detects that the stopper plate 21 is at a neutral position within a rotatable rotation range.

A rotation detecting device 29 serving as rotation detecting means is provided so as to face the outer peripheral edge of the rotation detecting magnet disk 13. This rotation detecting device 29
For example, a magnetic detection device including a Hall element and the like,
It is attached to the support member 3 and faces the outer peripheral edge of the rotation detecting magnet disk 13. The rotation angle and rotation speed of the rotation detection magnet plate 13 are determined by the rotation detection device 29.
, And supplied to a video editing device as a signal for controlling, for example, the playback speed of a video tape.

In the rotary operation device according to the present invention configured as described above, the rotary operation plate 1 is
When the rotation of the rotation operation plate is performed, the rotation of the rotation operation plate is transmitted to the rotation operation transmission member by the engagement of the ball engagement hole and the steel ball of the spring ball. Then, the rotating shaft 1
1, clutch plate 22 and rotation detecting magnet disk 13
Are rotated integrally. At this time, the clutch coil 34
Is in a non-energized state, the clutch plate 22 is not magnetized,
The clutch plate 22 and the stopper plate 21 are rotatable with each other. Therefore, the rotation detecting magnet disk 13 is continuously rotatable together with the rotating shaft 11 and the clutch plate 22. Also, the stopper plate 21
Are in a state where they are stopped with respect to the respective support plates 5 and 8 even when the clutch plate 22 is rotated.

In this rotation operating device, when the clutch coil 34 is energized, the clutch plate 22 is magnetized, the stopper plate 21 is attracted to the clutch plate 22, and the rotation with respect to the clutch plate 22 is prevented. Therefore, the rotation detecting magnet disk 13 is
2 and the like, and the stopper plate 21
The rotation is restricted in the rotation range restricted by the above, and the rotation in the angle range beyond this rotation range is restricted.

In this rotary operating device, when the clutch coil 34 is energized and the rotation of the stopper plate 21 is restricted by the stopper members 26 and 27, the rotary operation plate 18 is further rotated. Then
The steel ball 30 of each spring ball 16 is inserted into the ball engaging hole 17.
The rotation operation transmitting member 15
Transmission of rotational torque to the motor is interrupted.

That is, when the load for transmitting the rotation torque between the rotation operation plate 18 and the rotation operation transmission member 15 increases, the compression coil spring 32 is compressed by this load, and the steel ball 30 is immersed in the support cylinder 31. . When the steel ball 30 is immersed in the support cylinder 31 in this manner, the engagement between the steel ball 30 and the ball engaging hole 17 is released, and the transmission of the rotational torque between the rotation operation plate 18 and the rotation operation transmission member 15 is performed. Is shut off. In addition, the steel ball 30 of each spring ball 16 is configured such that the rotary operation plate 18
When rotated by an angle such as 0 °, it is engaged with the ball engaging hole 17 again.

Therefore, in this rotary operation device, even if the rotation plate 18 is rotated to further rotate the stopper plate 21 while the rotation of the stopper plate 21 is blocked, the rotation operation transmitting member 15 Is not transmitted to the rotation operation transmitting member 15.
Joint of the clutch plate 22 and the rotating shaft 1 of the clutch plate 22
Excessive rotational torque is prevented from being applied to the mounting portion to the first motor. In other words, it is possible to prevent the stop screws 14 and 23 used for mounting these components from becoming loose and the rotating shaft 11 from being damaged. At this time, the clutch coil 3
4. The clutch plate 22 and the stopper plate 21 are not slid with each other, so that damage to a portion facing the sliding contact therebetween can be prevented.

[0031]

As described above, in the rotary operating device according to the present invention, the first rotating body rotatably supported and whose rotation is detected by the rotation detecting means is connected to the rotary operating unit via the torque limiter mechanism. They are connected, and are rotated by the rotation operation of this rotation operation unit.

Therefore, in this rotary operation device,
A second rotatably supported rotatable member is connected to the first rotatable member via a clutch mechanism, and the second rotatable member is rotated by a rotation angle regulating member via an arm provided on the second rotatable member. When the rotation of the second rotating body is stopped and the rotation operation unit is further rotated, transmission of excessive torque to the first rotating body is interrupted by the torque limiter mechanism, and the clutch mechanism and the second There is no transmission of rotational torque to the rotating body.

That is, according to the present invention, in the state where the rotation range of the rotary operation unit is restricted and the rotation of the rotary operation unit is blocked, even if the rotary operation unit is applied with a further excessive rotational force, the rotary operation unit is damaged or damaged. Loss can be prevented, and an accurate operating state can always be maintained.

In particular, according to the invention of the present application, the torque limiter mechanism for connecting the first rotating body and the rotating operation unit is biased by the biasing member provided on either the first rotating body or the rotating operating unit. And a plurality of engagement holes selectively engaged with the sphere formed on the other one of the first rotating body and the rotating operation portion, so that an excessive load is applied to the rotating operation portion. When this is done, the connection between the first rotator and the rotary operation unit can be easily eliminated, and the connection between the first rotator and the rotary operation unit can be easily achieved. That is, the torque limiter mechanism can connect or disconnect the first rotating body and the rotary operation unit by engaging and disengaging the sphere biased by the biasing member with the engagement hole, thereby improving durability. It is possible to reliably connect or disconnect the first rotating body and the rotary operation unit.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a rotary operation device according to the present invention.

FIG. 2 is a plan view of the rotation operation device.

FIG. 3 is a bottom view of the rotary operation device.

FIG. 4 is an enlarged vertical sectional view showing a spring ball mechanism constituting the rotary operation device.

FIG. 5 is a longitudinal sectional view showing a conventional rotary operation device.

FIG. 6 is a plan view of the conventional rotary operation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Rotation shaft 13 Rotation detection magnet disk 15 Rotation operation transmission member 16 Spring ball 17 Ball engagement hole 21 Stopper plate 22 Clutch plate 24 Leaf spring 26 First stopper 27 Second stopper 28 Arm 29 Rotation detector 34 clutch coil

Claims (1)

(57) [Scope of request for utility model registration] A first rotating body rotatably supported; rotation detecting means for generating a rotation detection signal in accordance with the rotation of the first rotating body; and a coaxial shape with the first rotating body. Second rotatably supported on
A rotating mechanism; a clutch mechanism for connecting or separating the first and second rotating bodies; an arm provided on the second rotating body; and the second rotating body via the arm. A rotation angle regulating member that regulates the rotation angle of the first rotation body; and a rotation operation unit that rotates the first rotation body that is rotatably supported opposite to the first rotation body. The first rotating body and the rotation operation unit are configured to perform the first rotation
Biased sphere and the by the urging member disposed on the side
A rotary operation device for a video editing device, wherein the sphere formed in the rotary operation portion is connected via a torque limiter mechanism including a plurality of engagement holes that selectively engage with each other.