JPH059614Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mode switching operation device used in a recording/reproducing apparatus such as a VTR, for example, for switching to various speed drive modes for variable speed playback of a recording medium. .

[Summary of the invention] The present invention is a recording/reproducing device in which a code plate for detecting the rotation angle of an operating dial for mode switching is configured to be elastically locked at each predetermined rotational position. It is possible to fix the rotation position corresponding to the rotation position with a click feeling, thereby improving operability and downsizing the operating device.

[Conventional technology]

In a recording/playback device, such as a video editing device, a videotape can be continuously variable from still image playback to 5x playback, or 1/20x speed, 1/5x speed, etc.
An operation dial is provided for performing stepwise variable playback such as 2x speed and 5x speed.

This operation dial is held and turned by hand, and the desired playback speed is varied by changing the speed mode depending on the angle of rotation, but when the operation dial is released, it automatically The camera is configured to return to the still image playback position.

[Problem that the invention attempts to solve]

In this configuration, when the operation dial is not operated, the still image is always being played, and it is convenient because switching to each speed mode can be done unilaterally. However, when playing for a long time in the desired speed mode, During this time, it is necessary to hold the operation dial by hand, which causes problems such as fatigue of the operator and the inability to perform other operations.

In view of the above, the present invention provides a mode switching operation device for a recording/reproducing device in which an operation dial for switching to each mode by rotational operation is locked in a click-stop manner at a rotational angle position corresponding to each mode. With the goal.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a code plate having a rotation angle detected part of an operation dial for operating mode switching, and at least a part of a detection means for detecting the rotation angle detected part of the code plate. a plurality of positioning engagement parts provided at predetermined intervals in the circumferential direction on either one of the bearing side of the operation dial and the code plate; and a positioning engagement part between the bearing side of the operation dial and the code plate; The positioning engaging part and the engaging body have spherical tips that correspond to the engaging part and press against each other on the side where the part is not provided. A board having a rotation angle detection means is provided around the operation dial bearing, and elastically locks the code plate at each predetermined rotation position so that the rotation angle of the operation dial can be detected. It is composed of

[Effect]

With the above configuration, when the operation dial is held and turned by hand, the code plate having the rotation angle detected portion of the operation dial is rotated in accordance with the detection means, and the code plate is rotated in accordance with the detecting means. During rotation, the engaging body having a spherical tip is press-fitted and engaged with the plurality of positioning engaging parts one after another. Therefore, the operating dial is rotated like a click stop, and the code plate is locked at each predetermined rotational position, and the rotation angle of the operating dial is detected by detection by the detection means of the rotation angle detected portion of the code plate. A mode signal corresponding to this rotation angle is extracted and the mode state is connected.

〔Example〕

An embodiment of the present invention will be described below.
In this example, the present invention is applied to a search dial of a video editing device.

The operation dial device shown in the drawing is a jog dial used in a video editing device to move an image at any speed, from frame-by-frame forwarding to slow playback, or double speed, in a still image state, and a jog dial that is used to move an image in a still image state in the forward direction. and 1/5x speed in the reverse direction, standard speed,
It has a double dial configuration with a shuttle dial used for stepwise movement up to double speed and high speed.

This operation dial device will be explained below with reference to FIGS. 1 and 2.

Reference numeral 1 indicates the entire operation dial device, 2 a jog dial, and 3 a shuttle dial to which the present invention is applied.

A hollow shaft (hereinafter referred to as "shuttle shaft") 4 passes through the shuttle dial 3 and is tightened and fixed with a screw pin 5.The inner end of the shuttle shaft 4 has a male thread 4a formed on its outer periphery. A cutout surface 4b is formed. This shuttle shaft 4 is inserted into a bearing hole 6a of a bearing body 6 and is supported by the shaft, and a code plate (hereinafter referred to as shuttle code plate) 7 for detecting the rotation angle of the shuttle dial 3 is provided at the end protruding from the bearing hole 6a. is installed.

The shuttle cord plate 7 is shaped like a disk and has a required light-transmitting part 7a as a rotation angle detected part in the circumferential direction, and a central shaft hole 7b is formed so as to correspond to the protruding end of the shuttle shaft 4. The shaft hole 7b is formed in the same shape as the end face shape of the end portion, that is, in an occluded shape.
By fitting and engaging the protruding end of the shuttle shaft 4, and screwing and tightening the nut 8 onto the male screw 4a,
It is attached to the shuttle shaft 4 and rotated together with the shuttle dial 3.

In this example, the shuttle cord plate 7 is engaged with the shaft hole 7b at a plurality of positions, for example, nine positions, as a plurality of positioning engagement parts along an arc locus a located on the inner circumferential side of the transparent part 7. Hole 9
is held at a position corresponding to the engagement hole 9 on the inner surface side of the bearing body 6 facing the shuttle cord plate 7, that is, at a position corresponding to the arcuate trajectory a where the engagement hole is bored. A ball 10 as an engaging body having a spherical tip formed with a hole 6b is fitted into the engaging hole 9 of the shuttle cord plate 7 so as to be always elastically biased in the projecting direction via a compression spring 11. It is adapted to be engaged by the triggering.

The engagement hole 9 of the shuttle code plate 7 is moved in one direction, for example, in the forward rotational direction of the shuttle dial 3, from the center hole ₉₀ corresponding to the above-mentioned still image position of the shuttle dial 3 at the above-mentioned 1/5 speed or standard speed. ,2
4-position side hole 9 ₁ corresponding to double speed and high speed,
9 ₂ , 9 ₃ , 9 ₄ and side holes 9 ₅ , 9 ₆ , 9 ₇ , 9 ₈ at four positions corresponding to the above-mentioned speeds in the other direction, for example, in the reverse rotation direction of the shuttle dial 3. Furthermore, the center hole ₉₀ is formed to have a larger diameter than the other side holes, so that the ball 10 on the bearing body 6 side is engaged more deeply than the other side holes, thereby increasing the engagement force.

In addition, a shaft (hereinafter referred to as jogging shaft) 12 inserted into the hollow part of the shuttle shaft 4 is fastened and fixed to the jogging dial 2 with a screw pin 5. A stepped portion 12a is formed, the inner step surface of which is in sliding contact with the end surface of the shuttle shaft 4 via a washer 13, and a male thread 12b is formed at the tip.

A code plate (hereinafter referred to as a jog code plate) 14 for detecting the rotation angle of the jog dial 2 is attached to the end, i.e., the tip, of the jog shaft 12. The jog code plate 14 is disc-shaped like the shuttle code plate 7 and has a required light-transmitting portion 14a in the circumferential direction.
a) and the nut 12b is fastened to the male screw 12b.
5 is screwed and fastened to the jog shaft 12 so as to rotate integrally with the jog dial 2.

The shuttle cord plate 7 thus attached to the shuttle shaft 4 and the jog cord plate 14 attached to the jog shaft 12 are positioned between the wiring boards fixed to the bearing body 6. That is, the shuttle cord plate 7
are located between the first wiring board 16 and the second wiring board 17, and the jog code board 14 is located between the second wiring board 17 and the third wiring board 18. is a spacer 19 between each plate,
It is fixed to the bearing body 6 with screw pins 21 with 20 interposed therebetween, so that a required distance is maintained between each wiring board and the shuttle cord plate 7 and jog cord plate 14.

On the first and second wiring boards 16 and 17, a light emitting element 22 and a light receiving element 23 constituting a first photocoupler as a detection means correspond to the shuttle code board 7, and a second and third A light-receiving element 24 and a light-emitting element 25 constituting a second photocoupler as a detection means are disposed on the wiring boards 17 and 18 in correspondence with the jog code plate 14, and when each code plate 7 and 14 rotates, each Transparent parts 7a, 14a
Due to the movement of the light emitting elements 22 and 25 and the light receiving element 2
The light between 3 and 24 is interrupted, and an alternating signal with a number of cycles (number of pulses) proportional to the rotation angle of each code plate 7 and 14 is taken out from each photocoupler.

In the figure, 26 is a bush fitted into the bearing hole 6a of the bearing body 6, and its outer end is the shaft hole 27a of the fuselage pulse 27.
The end face is in contact with the inner surface of the shuttle dial 3.

The operation dial device 1 configured as described above is attached to the video editing device 30 as a search dial as shown in FIG. A signal proportional to the rotation angle of the jog dial 2 can be extracted steplessly from the rotation of the jog code plate 14, and the image can be moved at any speed from a still image to, for example, double speed.

Also, the shuttle dial 3 is the shuttle code plate 7.
When the engagement hole 9 is engaged with the ball 10, it is in a fixed state. Therefore, by grasping it by hand and turning it with a certain degree of force, the engagement hole is disengaged from the ball 10 and rotated, and the next stage of engagement occurs. The matching hole engages and is fixed to the ball 10. In this way, when the shuttle dial 3 is turned in the forward or reverse direction, the shuttle cord plate 7 is rotated in a fixed state for each stage of its engagement hole 9, and is proportional to the rotation angle of the shuttle dial 3. The resulting signals will be extracted step by step.

Therefore, the above-mentioned image can be moved in stages from a still image to 1/5x speed, standard speed, 2x speed, and high speed, and the shuttle dial 3 is reliably stopped at each speed change position and will not stop even if you release your hand. State is connected.

During this rotation operation of the shuttle dial 3, the center hole ₉₀ corresponding to the still image position of the engagement hole 9 of the shuttle cord plate 7 is formed to have a larger diameter than the other side holes ₉₁ , ₉₂ ... ₉₈ . Therefore, when the ball 10 as an engaging body is deeply engaged and the shuttle dial 3 is turned in the direction of moving the image from the still image position, the rotation torque becomes larger than the rotation torque between the shift positions, and therefore the image is shifted. When returning from the state to the still image state, the shuttle dial 3 is sequentially and lightly locked in a click-stop manner between the shift positions, but in the still image position, the shuttle dial 3 is locked firmly to the touch, making it possible to reliably perform the return operation. It can be carried out.

In the operation dial device 1 of this example configured as described above, the shuttle code plate 7 of the shuttle dial 3 is formed with the engagement hole 9 as an engagement part, but instead of this, a recessed part is formed. Alternatively, it is also possible to form the engaging portion on the periphery of the shuttle cord plate 7. In this case, a ball or the like as an engaging member that engages with this portion may be made to protrude from the inner surface of the bearing body 6, and the shuttle cord plate 7 may be formed by a leaf spring or the like. It is configured to be supported so as to be elastically biased in the direction of the circumferential edge of the code plate 7 and to be engaged with the engaging portion. Alternatively, the engaging body may be provided in a fixed state on the bearing body 6, and the shuttle cord plate 7 itself may be elastically biased toward the engaging body to engage the engaging portion.

Furthermore, the transparent parts 7a, 1 of each code plate 7, 14
4a may be formed into a notch shape instead of a slit shape, and the means for extracting signals by rotating the code plates 7 and 14 is limited to one that transmits and interrupts the light from the photocoupler as in this example. Alternatively, a light and dark pattern may be formed on the code plates 7 and 14, and the light from the photocoupler may be reflected to extract the signal.

The above embodiments are cases where the present invention is applied to a shuttle dial as a search dial of a video editing device, but the present invention can also be applied to operation dials as operation devices of various electronic devices.

[Effect of idea]

As described above, according to the present invention, a plurality of positioning engagements corresponding to each mode are provided on either the code plate for detecting the rotation angle of the operation dial for operating the mode switching operation device to switch modes, or the bearing side of the operation dial. portions are provided at predetermined intervals in the circumferential direction, and an engaging body with a spherical tip is provided on the other side, and the positioning engaging portion and the engaging body are pressed against each other and engaged elastically, so that the operation dial can be adjusted. The dial is rotated in a click-stop manner, and becomes fixed at the position corresponding to each mode, allowing for reliable positioning.Also, even if you take your hand off the operation dial, it remains stopped at that position, allowing the operator to turn the dial during operation. Since there is no need to keep holding it, there is no feeling of fatigue and operability is improved.

Moreover, the positioning engaging part and the engaging body are provided on the inner circumferential side of the rotation angle detected part of the code plate, and a board having a rotation angle detection means for detecting the rotation angle detected part of the code plate is arranged around the operation dial bearing. established,
By configuring the code plate to have both the function of detecting the rotation angle of the dial and the function of positioning and locking, the overall configuration of the operating device is simplified, making it possible to downsize it, and reducing the manufacturing process, resulting in lower costs. This has the effect of making it possible to improve the situation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an example of the mode switching operating device according to the present invention, and FIG. 2 is an exploded perspective view of the operating device.
FIG. 3 is a perspective view of a video editing device using the mode switching operation device according to the present invention as an operation dial;
FIG. 4 is a plan view of the operation dial portion of the video editing device. In the figure, 3 is a shuttle dial as an operation dial, 4 is a shaft, 6 is a bearing body, 7 is a code plate, 7a
1 is a transparent part as a rotation angle detected part, 9 is an engagement hole as an engagement part, 10 is a ball as an engagement body, 1
1 is a compression spring, 16 and 17 are wiring boards, and 22 and 23 are a light emitting element and a light receiving element as detection means.

Claims (1)

[Scope of Claim for Utility Model Registration] A code plate having a rotation angle detected part of an operation dial for operating mode switching, and a board provided with at least a part of a detection means for detecting the rotation angle detected part of the code plate. , a plurality of positioning engagement portions provided at predetermined intervals in the circumferential direction on either one of the bearing side of the operation dial and the code plate; and the positioning engagement portions on the bearing side of the operation dial and the code plate. An engaging part with a spherical tip is provided so as to correspond to the engaging part and press against each other on the side where the engaging part is not provided, and the positioning engaging part and the engaging body are arranged so that the rotation angle is detected. A substrate having the rotation angle detection means is provided around the operation dial bearing, elastically locking the code plate at each predetermined rotational position, and detecting the rotation angle of the operation dial. A mode switching operation device for a recording/reproducing device, characterized in that the rotation angle can be detected.