JP2007073135A - Optical disk playback device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jog dial capable of easily and quickly replacing an operation disk without any tools. <P>SOLUTION: An optical disk playback device is provided with a jog dial for receiving the instruction input of a rotational direction and a rotational speed. The jog dial includs a bearing 44 fixed to a rotary shaft 32 and having a notched straight part and a mounting part for mounting an operation disk in its outer peripheral part, an operation disk part 30 having an engaging hole having a notched straight part in a center and engaged with the notched straight part formed in the bearing via the notched straight part of the engaging hole, a rotation detection means 33 for detecting the rotational direction and speed of the rotary shaft and generating a reproduction instruction signal based on the detected rotational direction and speed, and a holding part 31 for holding the operation signal part mounted on the mounting part with the mounting part, and the operation disk part is engaged with and held in the rotary shaft detachably. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical disk reproducing apparatus, and more particularly to an optical disk reproducing apparatus including an operation disk unit that stores data read from an optical disk in a storage unit and instructs a reading speed or reading order of the stored data.

  A disc jockey (DJ: Disc Jockey) operates a playback device such as an optical disk playback device to play back audio data. During playback, for example, special playback called scratch playback that generates sound effects such as rubbing sound is performed during playback of a signal recorded on a disc such as an analog record or a compact disc (CD: Compact Disc). Sometimes.

  When scratch reproduction is performed using an analog record player, a rubbing sound can be generated by quickly and forcibly manually rotating the analog record being reproduced in the normal rotation direction (forward direction) or the reverse direction. Further, CD players capable of performing scratch reproduction similar to scratch reproduction by such an analog record player are known (see, for example, Patent Document 1 and Patent Document 2).

  FIG. 14 is a cross-sectional view showing a jog dial of a conventional optical disk reproducing apparatus. In the figure, the disk part 27 is rotated at a constant speed by a motor (not shown). The disk portion 27 includes a slit portion (not shown), and the rotation direction and the rotation speed of the shaft 321 are detected by a second optical sensor portion (not shown).

  The shaft 321 includes a female screw portion 322 at the upper end portion. The stopper portion 310 has a hole in the center, and the stopper portion 310 is fixed to the shaft 321 by being fastened to the female screw 322 of the shaft with the fixing screw 322 inserted into the hole.

  The stopper portion 310 includes a convex portion that protrudes downward on the outer peripheral portion. When the stopper portion 310 is fixed to the shaft 321 by a fixing screw, the operation disk portion 30 is pressed downward by the convex portion. The operation disk part 30 is placed on the upper surface of the disk part 27 via the sheet part 29. A frictional force is generated between the upper surface of the operation disk part 30 and the lower end of the protrusion part of the stopper part 310 due to the pressing force that the convex part formed on the stopper part 310 presses the operation disk part 30 downward. This frictional force is larger than the frictional force between the operation disk part 30 and the sheet part 29. Accordingly, when the operation disk part 30 is rotated, the stopper part 310 that presses the operation disk part 30 downward is also rotated, and the shaft 321 fixed to the stopper part 310 is also rotated.

  Therefore, the rotation state of the operation disk part 30 by the rotation operation of DJ is transmitted to the shaft 321, and the operation disk part 30 and the shaft 321 rotate integrally.

  The shaft 321 includes a rotating disk portion (not shown) in a lower portion, and a slit portion for detecting the rotation direction and the rotation speed of the shaft by a first optical sensor unit (not shown) on the outer periphery of the rotating disk portion. A control unit (not shown) controls the audio data stored in the memory according to the rotation direction and the rotation speed of the disk unit 27 and the operation disk unit 30 detected by the first optical sensor unit and the second optical sensor unit (not shown). The reading speed and reading order are controlled, and a sound effect equivalent to a rubbing sound by an analog record is generated.

As described above, the operation disk unit and the storage unit (memory) are provided, the audio data reproduced from the CD is stored in the memory, and the operation disk unit is stored in the memory by rotating in the normal rotation direction or the reverse rotation direction. By controlling the reading speed and reading order of audio data, it is possible to generate a sound effect equivalent to a rubbing sound due to an analog record.
JP 2005-108319 A JP 2003-346469 A

  As described above, in the DJ CD player, the operation feeling similar to that of the turntable of the analog record can be obtained by rotating the operation disk portion similar to the analog record. However, if there is a gap between the operation disk and the stopper or between the stopper and the shaft, or the gap becomes large due to changes over time or wear of parts, the rotation of the operation disk is accurately It will not be transmitted to. In this case, even if the operation disk is quickly rotated in the forward or reverse direction according to the timing of the song, the rotation of the shaft does not follow the rotation of the operation disk, and the audio data stored in the memory is reproduced. An error will occur.

  Further, as shown in FIG. 14, when the stopper 310 is fixed to the shaft 321 by the fixing screw 322, the fixing screw 322 is loosened with the rotation operation of the operation disk portion 30, and the fixing screw 322 is The stopper part 310 may come off.

  In addition, a DJ that operates such an optical disk playback apparatus for DJ uses an operation disk part that is an original print selected by the DJ, instead of the provided operation disk part 30, and uses an optical disk playback apparatus. There is a request to perform the operation. Such an original operation disk part is required to be able to be quickly replaced with a disk part that matches the tone of the music to be played back by the optical disk playback device each time the music tone is changed.

  However, in the conventional optical disc reproducing apparatus as shown in FIG. 14, the stopper portion 310 for connecting the operation disk portion 30 and the shaft 321 is fixed to the upper surface portion of the shaft 321 by the fixing screw 322. For this reason, in order to replace the operation disk part 30, a dedicated tool for loosening or tightening the fixing screw 322 is required. Moreover, the operation disk part 27 cannot be replaced quickly and easily.

  The present invention has been made in view of these problems, and can transmit the rotation of the operation disk portion to the shaft accurately, and can quickly and easily replace the operation disk portion without requiring a tool. It is an object of the present invention to provide an optical disk reproducing apparatus that can perform the above-described process.

  In order to solve the above problems, the present invention employs the following means.

  In the optical disc reproducing apparatus for reading a signal recorded on an optical disc, storing the read signal in a memory, and reading and reproducing the stored signal in an order and speed according to a reproduction instruction signal instructed by the control unit, the control unit Includes a jog dial that receives an instruction input of the rotation direction and the rotation speed, and the jog dial is fixed to the rotation shaft, and has a mounting portion for mounting a notch-shaped linear portion and an operation disk portion on the outer peripheral portion thereof. A bearing having an engagement hole having a notch-like straight portion at the center, and engaging with the notch-like straight portion formed in the bearing via the notch-like straight portion of the engagement hole. An operation disk unit, a rotation detecting means for detecting a rotation direction and a rotation speed of the rotating shaft, and generating the reproduction instruction signal based on the detected rotation direction and rotation speed; And a holding portion for holding the operation discal unit which is placed above with held between the placing section, freely engage retain releasably said operation disc unit to the rotary shaft.

  Since the present invention has the above-described configuration, the rotation of the operation disk portion can be accurately transmitted to the shaft, and the operation disk portion can be easily and quickly replaced without requiring a tool.

  Hereinafter, the best embodiment will be described with reference to the accompanying drawings. FIG. 1 is a diagram for explaining an optical disk reproducing apparatus according to an embodiment of the present invention. In FIG. 1, an optical disk reproducing apparatus includes a turntable 1, a spindle motor 2, a servo control unit 3, an optical pickup 4, a reproduction amplifier 5, a signal processing unit 6, a memory control unit 7, a RAM (Random Access Memory) 8, a DAC (Digital Analog Converter) 9, amplifier 10, output terminal 11, control unit 12, display unit 13, and operation unit 14. The operation unit 14 includes a reading instruction unit and a jog dial, and can change the reading speed and reading order of the digital audio data reproduced from the CD and stored in the RAM 8 according to the rotation speed and rotation direction from the jog dial.

  The turntable 1 fixed to the spindle motor 2 holds the CD and rotates. When a reproduction start instruction is input from the operation unit 14, the servo control unit 3 rotationally drives the spindle motor 2 at a predetermined linear velocity. The servo control unit 3 controls a focus servo circuit and a tracking servo circuit (not shown) so that the laser light from the optical pickup 4 correctly traces the bit string of the CD.

  Digital audio data read by the optical pickup 4 is waveform-shaped and amplified by the reproduction amplifier 5 and then input to the signal processing unit 6. The signal processing unit 6 performs processing such as demodulation of digital audio data, error signal processing such as a focus error signal and tracking error signal, and extraction of a synchronization signal, and then inputs the digital audio data to the memory control unit 7.

  The memory control unit 7 controls the input digital audio data to be input to the RAM 8. The RAM 8 stores the input digital audio data. The digital audio data stored in the RAM 8 is read out and input to the DAC 9 under the control of the memory control unit 7. The DAC 9 converts digital audio data into an analog audio signal. The analog audio signal converted by the DAC 9 is amplified by the amplifier 10 and output from the output terminal 11.

  The display unit 13 displays the playback time, track number, etc. of the currently playing track. The operation unit 14 includes an input switch for receiving a predetermined instruction such as a reproduction / reproduction stop instruction or an ejection instruction.

  FIG. 2 is a diagram showing a side cross-section of the jog dial unit provided in the operation unit 14 of the optical disk reproducing apparatus according to the present invention. As shown in FIG. 2, the jog dial part includes a panel 21, a motor 22, a disk part 27, a sheet part 29, an operation disk part 30, a holding part 31, and a bearing 44. The motor 22 includes an iron core 23, a winding 24, a magnet 25, a magnet fixing portion 26, a base 28, a rotation shaft 32 (inner rotation shaft), a second optical sensor portion 33, a scale holding portion 34, a scale portion 35, a first portion. 1 optical sensor unit 36, scale holding unit 37, scale unit 38, E ring 39, screw 40, bearing 41, bearing 42, bearing 43, rotating shaft 45 (outer rotating shaft), thrust bearing 46, Hall element 47, substrate 48 Consists of

  The operation disk part 30 is constituted by a disk-shaped jog dial corresponding to the size of an analog record having a diameter of 10 cm to 30 cm, and is attached to the upper surface of the optical disk reproducing apparatus. Further, the motor 22 is fixed to the panel 21 of the optical disk reproducing device with screws 40.

  The scale portion 38 for detecting the rotation state of the disk portion 27 is fixed to the scale holding portion 37 attached to the rotation shaft 45 of the motor 22 with a screw. The first optical sensor unit 36 is fixed to the base 28 of the motor 22 with screws. Further, the scale holding unit 37 is fixed to the rotating shaft 45.

  A rotating shaft 32 that is a holding shaft of the operation disk portion 30 is held by a thrust bearing 46. The rotating shaft 32 is pivotally supported by the bearing 43 while being inserted into the bearing 43. The scale unit 35 for detecting the rotation state of the operation disk unit 30 is fixed to the scale holding unit 34 with screws. Further, the scale holding unit 34 is inserted into the rotary shaft 32 via the E ring 39. The second photosensor unit 33 is fixed to the base 28 with screws.

  The sheet part 29 is placed on the upper surface of the disk part 27. The bearing 44 is fixed to the rotating shaft 32 by a screw (not shown). The operation disk part 30 is placed on the upper surface of the sheet part 29. The sheet portion 29 is formed of a material such as a resin having a small friction coefficient.

  The holding part 31 is placed on the upper surface of the operation disk part 30, and a convex part 31 a provided on the holding part 31 is inserted into an oblong hole 30 b provided on the operation disk part 30 as described later. The sheet part 29 and the operation disk part 30 are held.

  Thereby, the rotation state of the operation disk part 30 by the rotation operation of DJ is reliably transmitted to the scale part 35 attached to the scale holding part 34 via the rotation shaft 32, and the operation disk part 30, the scale part 35, Rotate together.

  3A and 3B are diagrams for explaining the second optical sensor unit 33 and the scale unit 35. FIG. 3A is a diagram showing the top surface of the scale unit 35, and FIG. 3B is a diagram of FIG. It is the figure which expanded the part of the dotted line circle.

  As shown in FIG. 3A, rectangular slit portions 35 a are provided at equal intervals on the outer peripheral portion of the scale portion 35. Similarly to the scale portion 35, the scale portion 38 is provided with rectangular slit portions at equal intervals on the outer periphery thereof.

  As shown in FIG. 3B, the second optical sensor unit 33 includes two optical sensors 33a and 33b for detecting the rotation direction of the scale unit 35 that rotates integrally with the operation disk unit 30, and includes a slit. It is being fixed to the base 28 of the motor 22 so that the part 35a can be detected. The first photosensor unit 36 includes two photosensors similarly to the second photosensor unit 33, and is fixed to the base 28 of the motor 22 so that the slit portion can be detected.

  The first optical sensor unit 36 detects the slit portion of the scale unit 38, generates a first pulse signal corresponding to the rotation state (rotation speed and rotation direction) of the disk unit 27, and inputs the first pulse signal to the control unit 12. The second optical sensor unit 33 detects the slit portion 35 a of the scale unit 35, generates a second pulse signal corresponding to the rotation state (rotation speed and rotation direction) of the operation disk unit 30, and sends it to the control unit 12. input.

  The control unit 12 controls the motor 22 from the first pulse signal input from the first optical sensor unit 36 so as to keep the rotational speed of the disk unit 27 at a predetermined speed. The control unit 12 controls the memory control unit 7 by determining the reading speed and direction of the digital audio data stored in the RAM according to the second pulse signal input from the second optical sensor unit 33.

  In the optical disk reproducing apparatus of the present embodiment, when reproducing audio data recorded on a CD, the motor 22 is rotated at a predetermined speed. Thereby, the sheet part 29, the operation disk part 30, the scale part 35, and the scale part 38 rotate at the same speed as the disk part 27. Here, the operation disk part 30 rotates at the same rotational speed as the disk part 27 due to friction with the sheet part 29 placed so as to follow the rotation of the disk part 27.

  Further, when the operation disk unit 30 is operated, if the rotation speed of the disk unit 27 rotating at a predetermined speed changes, the control unit 12 receives the first time input from the first optical sensor unit 36 for a predetermined time. In accordance with the number of pulses of one pulse signal, the motor 22 is controlled so that the rotation speed of the rotating unit 27 maintains a predetermined speed.

  FIG. 4 is a diagram for explaining a method of determining the rotation direction of the operation disk unit 30 by the second optical sensor unit 33.

  As shown in FIG. 3B, when the optical sensor 33a and the optical sensor 33b included in the second optical sensor unit 33 detect the slit unit 35a, they output a second pulse signal indicating ON, and the slit unit 35a When it cannot be detected, a second pulse signal indicating OFF is output.

  The optical sensors 33a and 33b generate the following four output patterns as combinations of the second pulse signals to be output.

# 1: 33a-ON, 33b-OFF
# 2: 33a-ON, 33b-ON
# 3: 33a-OFF, 33b-ON
# 4: 33a-OFF, 33b-OFF
Here, assuming that the optical sensor 33a is set at a position advanced in the forward direction by (n pitch + 1/4 pitch) with respect to the optical sensor 33b, the hot water joint in which the operation disk portion 30 has rotated in the forward direction is used. As shown in FIG.
# 4 → # 1 → # 2 → # 3 → # 4 → # 1 →
The above-described output pattern is generated in this order.

On the other hand, when the operation disk part 30 rotates in the reverse direction, as shown in FIG.
# 1 → # 4 → # 3 → # 2 → # 1 → # 4 → ...
In this order, the above-described pattern is generated.

  The control unit 12 can detect the difference in the generation order of the output patterns and determine the rotation direction of the operation disk unit 30. Similarly, regarding the determination of the rotation direction of the disk portion 27, the control unit 12 rotates the disk portion 27 based on the output patterns of the first pulse signals respectively output from the two optical sensors 36 included in the first optical sensor portion 36. The direction can be determined.

  When scratch reproduction is performed using the optical disk reproducing apparatus of the present embodiment, the DJ repeatedly performs an operation of quickly rotating the operation disk unit 30 in the forward direction or the reverse direction by hand. The control unit 12 determines the rotational speed and direction of the operation disk unit 30 from the second pulse signal input from the second optical sensor unit 33. The control unit 12 controls the memory control unit 7 according to the determined rotation speed and rotation direction. The memory control unit 7 controls the reading speed and reading order of the digital audio data stored in the RAM 8. As a result, the digital audio data read from the RAM 8 is converted into an analog audio signal via the DAC 9, further amplified by the amplifier 10, and output as a sound effect such as a rubbing sound from the speaker connected to the output signal 11. The

  As described above, in the optical disc reproducing apparatus of the present embodiment, an operation similar to the operation of performing special reproduction using an analog record can be performed.

  As is apparent from the above description, when the operation disk unit 30 is operated in order to realize the scratch reproduction similar to the operation of performing the special reproduction using the analog record by using the optical disk reproducing apparatus of the present embodiment. It is necessary that the rotational speed and direction of the operation disk part 30 be accurately transmitted to the scale part 35 via the holding part 31, the rotating shaft 32 and the holding part 34. For this purpose, it is required that there is no gap in the coupling of the operation disk part 30, the holding part 31, and the rotating shaft 32.

  Next, the structure of the operation disk part 30, the bearing 44, the holding part 31, and the rotating shaft 32 of the optical disk reproducing apparatus of this embodiment will be described.

  5A and 5B are diagrams showing the configuration of the rotating shaft 32. FIG. 5A is a top view, FIG. 5B is a cross-sectional view of FIG. 5A, and FIG. FIG. 6 is a cross-sectional view seen from a direction rotated 90 degrees from FIG.

  As shown in the drawing, the rotating shaft 32 has a pair of slits 32a formed in a direction orthogonal to the rotating shaft. Moreover, the recessed part 32b is formed in the direction orthogonal to the slit 32a.

  6A and 6B are diagrams showing the configuration of the bearing 44 fixed to the rotating shaft 32. FIG. 6A is a top view, FIG. 6B is a cross-sectional view, and FIG. It is sectional drawing seen from the direction rotated 90 degree | times from FIG.6 (b) centering on FIG.

  The bearing 44 is a disk type, has a hole 44b in the center, and has a mounting portion 44c that protrudes in an annular shape in the outer peripheral direction in order to mount the operation disk portion 30 on the outer periphery. The bearing 44 has a notch-shaped linear portion 44a formed in a part of the outer periphery of the upper portion, whereby the upper portion of the mounting portion 44c forms a D shape. The mounting portion 44c includes a female screw portion 44d on the outer periphery. A screw 40 described later is fastened to the female screw portion 44d.

  7A and 7B are views showing a state in which the bearing 44 is fixed to the rotating shaft 32. FIG. 7A is a top view and FIG. 7B is a cross-sectional view.

  As shown in the drawing, after the bearing 44 is inserted into the rotating shaft 32, the position of the recess 32b of the rotating shaft 32 and the position of the female screw portion 44d of the bearing 44 are matched. Next, the screw 40 is inserted into the female screw portion 44d, and the screw 40 is tightened until the screw head portion of the screw 40 comes into contact with the bottom portion of the recess 32b. Thereby, the bearing 44 can be fixed to the rotating shaft 32.

  8A and 8B are diagrams showing the operation disk part 30 and the sheet part 29, in which FIG. 8A is a top view showing the operation disk part 30, and FIG. 8B is a top view showing the sheet part 29.

  The operation disk portion 30 includes a D-shaped hole 30a having a notch-shaped straight portion 30c formed at the center so as to have a D-shape slightly larger than the D-shaped portion of the bearing 44. Moreover, the operation disk part 30 is provided with the oblong hole 30b in the position which becomes symmetrical centering | focusing on the D-shaped hole 30a, respectively. The oblong hole 30b is formed so that its longitudinal direction is parallel to the straight line portion 30c.

  The seat portion 29 includes a circular hole 29a having a diameter slightly larger than the outer diameter of the mounting portion 44c of the bearing 44 at the center thereof.

  9A and 9B are diagrams illustrating the configuration of the holding unit 31. FIG. 9A is a bottom view, FIG. 9B is a cross-sectional view taken along line BB in FIG. 9A, and FIG. FIG. 9A is a cross-sectional view taken along the line CC of FIG. 9A, FIG. 9D is a side view of FIG. 9A, and FIG.

  As shown in the figure, the holding portion 31 has a disk shape in which the upper surface becomes a spherical surface from the inner periphery to the outer periphery. The holding part 31 is formed with a notch 31c penetrating vertically from a part of the outer periphery to the center part, and an inclined part 31b is formed on the side wall of the notch 31c. The holding portion 31 includes convex portions 31 a that protrude downward at positions that are orthogonal to the notch 31 c and are symmetric with respect to the center of the holding portion 31.

  FIG. 10 is a view showing a state in which the sheet portion 29 and the operation disk portion 30 are placed on the upper surface of the disk portion 27 from the state shown in FIG. 7, where FIG. 10 (a) is a top view and FIG. FIG. 10C is a cross-sectional view seen from a direction rotated 90 degrees from the position of FIG. 10B around the axis of the rotation shaft 32.

  As shown in the drawing, the sheet portion 29 is placed on the upper surface of the disk portion 27 in a state where the hole 29 a is inserted into the outer peripheral portion of the placement portion 44 c of the bearing 44. At this time, the height of the upper surface of the seat portion 29 is set to be substantially the same as the upper surface of the placement portion 44 c of the bearing 44. Further, the operation disk part 30 is placed on the sheet part 29. Further, the height of the upper surface of the operation disk portion 30 is set to be substantially the same as the upper surface of the bearing 44.

  At this time, an engagement hole (D-shaped hole) having a notch-shaped straight portion at the center on the outer peripheral portion of the bearing 44 in which the notched straight portion (D-shaped straight portion) is formed. It arrange | positions so that the operation disc part 30 in which 30a was formed may be fitted. Thereby, the operation disk part 30 can be firmly fixed to the rotating shaft 32.

  11A and 11B are diagrams for explaining a method of mounting the holding portion 31 on the upper surface of the operation disk portion 30, FIG. 11A is a top view, and FIG. 11B is a cross-sectional view of FIG. .

  With the notch 31c of the holding part 31 facing the direction of the rotating shaft 32, the holding part 31 is placed on the upper surface of the operation disk part 30, and then, as shown in FIG. Is moved in the arrow Y direction. Then, the notch 31 c of the holding part 31 enters the slit 32 a of the rotating shaft 32. At this time, the holding portion 31 is warped upward, and a pressing force is generated in the direction of the arrow V due to elasticity of the warp.

  12 is a view showing a state in which the convex portion 31a of the holding portion 31 is inserted into the oblong hole 30b of the operation disk portion 30 from the state shown in FIG. 11, and FIG. 12 (a) is a top view and FIG. ) Is a cross-sectional view of FIG.

  When the holding portion 31 is further moved in the center direction of the rotation shaft 32 from the state shown in FIG. 11, as shown in FIGS. 12A and 12B, the convex portion 31 a of the holding portion 31 is moved to the operation disk portion 30. The holder 31 is fixed to the rotary shaft 32 by entering the oblong hole 30b. At this time, the holding portion 31 is prevented from rotating freely with respect to the rotating shaft 32 by the convex portion 31a entering the oblong hole 30b. Further, in this state, the inclined portion 31 b of the holding portion 31 is pressed in the direction of the placement portion of the bearing 44 by the slit 32 a of the rotating shaft 32, so that the outer peripheral portion of the holding portion 31 moves down the upper surface of the operation disk portion 30. Press on.

  When the DJ rotates the operation disk portion 30 in this state, the D-shaped portion of the bearing 44 is engaged with the D-shaped hole 30a, and the convex portion 31a is fitted into the oblong hole 30b of the operation disk portion 30. As a result, the bearing 44 and the holding part 31 also rotate in the same manner as the operation disk part 30. As the bearing 44 and the holding unit 31 rotate, the rotating shaft 32 also rotates in the same manner. As a result, when the operation disk part 30 is rotated, the rotary shaft 32 is rotated in the same manner.

  As described above, the rotation of the operation disk part 30 can be accurately transmitted to the scale part 35 via the holding part 31, the rotating shaft 32, and the holding part 34.

  At this time, for example, even if there is a gap between the inner wall part of the D-shaped hole 30a of the operation disk part 30 and the outer peripheral part of the D-shaped part of the bearing 44, the oblong hole 30b of the operation disk part 30 and the holding part 31 If there is no gap between the convex portion 31a, no deviation occurs between the rotation of the operation disk portion 30 and the rotation of the rotary shaft 32. On the other hand, even if there is a gap between the oblong hole 30b of the operation disk part 30 and the convex part 31a of the holding part 31, the inner wall portion of the D-shaped hole 30a of the operation disk part 30 and the D-shape of the bearing 44 If there is no gap in the outer peripheral part of the part, there will be no deviation between the rotation of the operation disk part 30 and the rotation of the rotary shaft 32.

  Further, for example, when the operation disk part 30 is replaced, even when the thickness of the replaced operation disk part 30 varies, the outer peripheral portion of the holding part 31 always presses the upper surface of the operation disk part 30 downward. Therefore, there is no gap between the upper surface of the operation disk part 30 and the lower surface of the holding part 31. For this reason, there is no deviation between the rotation of the operation disk portion 30 and the rotation of the rotary shaft 32.

  Further, since the operation disk portion 30 is fixed to the rotation shaft 32 by inserting the holding portion 31 into the rotation shaft 32, the operation disk portion is fixed to the shaft by a fixing screw as in the conventional optical disk reproducing apparatus. As a result, the fixing screw is not loosened, and the fixing screw is not detached.

  When exchanging the operation disk part 30 with another operation disk part, the outer peripheral part of the holding part 31 is lifted slightly upward from the state shown in FIG. 12 and held in the direction opposite to the arrow Y direction shown in FIG. By moving the part 31, the holding part 31 can be easily detached from the rotating shaft 32.

  Next, after replacing the operation disk part 30 placed on the sheet part 29 with another operation disk part, the holding part 31 is fixed to the rotating shaft 32 as described above.

  As described above, the optical disk reproducing apparatus of this embodiment can rotate the operation disk unit 30 and rotate the rotation shaft 32 even if the operation disk unit 30 placed on the upper surface of the disk unit 27 is rotated via the sheet unit 29. It is possible to prevent deviation from occurring during rotation. Further, since no special tool for loosening or tightening the fixing screw is required to replace the operation disk part 30, the operation disk part 30 can be easily and quickly replaced with another operation disk part.

  FIG. 13 is a view showing another embodiment of the present invention, FIG. 13 (a) is a top view showing the configuration of the holding portion, FIG. 13 (b) is a sectional view of FIG. 13 (a), and FIG. FIG. 13C is a cross-sectional view illustrating a state where the holding unit illustrated in FIGS. 13A and 13B is removed from a state where it is mounted on the upper surface of the operation disk unit 30.

  As shown in FIGS. 13A and 13B, the holding unit 31 includes an arm 31d on the upper surface in addition to the configuration of the holding unit shown in FIG. The arm 31d is disposed at a position on the upper surface above the convex portion 31a. As described above, when the arm 31d is provided on the upper surface of the holding portion 31 and the holding portion 31 is to be removed from the state in which the holding portion 31 is mounted on the upper surface of the operation disk portion 30, FIG. As shown in FIG. 3, the upper portion of the arm 31d is pressed inward to bend the outer periphery of the holding portion 31 upward. Thereby, the convex part 31a can be easily removed from the oval hole 30b. Subsequently, the holding part 31 can be easily detached from the rotating shaft 32 by moving the holding part 31 from this state.

  In the optical disk reproducing apparatus of the present embodiment, the operation disk portion 30 is provided with the oblong hole 30b and the holding portion 31 is provided with the convex portion 31a, but the D-shaped hole 30a of the operation disk portion 30 and the D of the bearing 44 In the case where the mold-shaped portions are fitted without a gap, the oval hole 30b and the convex portion 31a may not be provided. Thereby, when it is going to remove the holding part 31 from the upper surface of the operation disk part 30, the holding part 31 can be removed easily. In this case, the production cost of the operation disk part 30 and the holding part 31 can be reduced. In the optical disk reproducing apparatus according to the present embodiment, the operation disk portion 30 includes the D-shaped hole 30a, and the bearing 44 includes the linear portion 44a. However, the convex portion 31a of the holding portion 31 and the operation disk portion 30 are provided. When a gap does not occur in the oval hole 30b, the D-shaped hole 30a and the straight portion 44a may be omitted. Thereby, the production cost of the operation disk part 30 and the bearing 44 can be reduced.

It is a figure explaining the optical disk reproducing | regenerating apparatus concerning embodiment of this invention. It is a figure which shows the side cut of the jog dial part with which the operation part 14 of CD player is provided. It is a figure explaining the 2nd optical sensor part 33 and the scale part. It is a figure explaining the method to discriminate | determine the rotation direction of the operation disk part 30 by the 2nd optical sensor part. FIG. 4 is a diagram illustrating a configuration of a rotating shaft 32. It is a figure which shows the structure of the bearing 44 fixed to the rotating shaft 32. FIG. It is a figure which shows the state which fixed the bearing 44 to the rotating shaft 32. FIG. It is a figure which shows the operation disk part 30 and the sheet | seat part 29. FIG. 3 is a diagram illustrating a configuration of a holding unit 31. FIG. FIG. 8 is a diagram illustrating a state in which the sheet portion 29 and the operation disk portion 30 are placed on the upper surface of the disk portion 27 from the state illustrated in FIG. 7. FIG. 6 is a diagram for explaining a method of mounting the holding unit 31 on the upper surface of the operation disk unit 30. FIG. 12 is a view showing a state in which a convex portion 31 a of the holding portion 31 is fitted into the oblong hole 30 b of the operation disc portion 30 from the state shown in FIG. 11. It is a figure which shows other embodiment of this invention. It is sectional drawing which shows the jog dial of the conventional optical disk reproducing | regenerating apparatus.

Explanation of symbols

1 Turntable 2 Spindle motor 3 Servo controller 4 Optical pickup
5 Reproducing Amplifier 6 Signal Processing Unit 7 Memory Control Unit 8 RAM
9 DAC
DESCRIPTION OF SYMBOLS 10 Amplifier 11 Output terminal 12 Control part 13 Display part 14 Operation part 21 Panel part 22 Motor 23 Iron core 24 Winding 25 Magnet 26 Magnet fixing part 27 Disk part
28 Base 29 Sheet part 30 Operation disk part 30a D-shaped hole 30b Oval hole 30c Straight part
31 Holding part 31a Convex part 31b Inclined part 31c Notch 31d Arm 32 Rotating shaft (inner rotating shaft)
32a slit 32b recess
33 Second optical sensor unit 33a, 33b Optical sensor 34, 37 Scale holding unit 35, 38 Scale unit
35a Slit part 36 1st optical sensor part 39 E ring 40 Screw 41, 42, 43, 44 Bearing 44a Linear part 44b Hole 44c Mounting part 44d Female thread part
45 Rotating shaft (Outside rotating shaft)
46 Thrust bearing 47 Hall element 48 Substrate

Claims (4)

In an optical disc playback apparatus that reads a signal recorded on an optical disc, stores the read signal in a memory, and reads and plays the stored signal at an order and speed according to a playback instruction signal instructed by a control unit.
The control unit includes a jog dial that receives an instruction input of a rotation direction and a rotation speed,
A bearing fixed to the rotating shaft and having a mounting portion for mounting a notch-shaped linear portion and an operation disk portion on the outer periphery thereof;
An operation disk portion having an engagement hole having a notch-like straight portion at the center, and engaging with the notch-like straight portion formed in the bearing via the notch-like straight portion of the engagement hole. When,
Rotation detection means for detecting the rotation direction and rotation speed of the rotation shaft, and generating the reproduction instruction signal based on the detected rotation direction and rotation speed;
A holding portion that holds and holds the operation disk portion placed on the placement portion with the placement portion, and detachably engages and holds the operation disc portion on the rotating shaft. An optical disc reproducing apparatus characterized by the above. In an optical disc playback apparatus that reads a signal recorded on an optical disc, stores the read signal in a memory, and reads and plays the stored signal at an order and speed according to a playback instruction signal instructed by a control unit.
The control unit includes a jog dial that receives an instruction input of a rotation direction and a rotation speed,
A bearing fixed to the rotating shaft and provided with a mounting portion for mounting the operation disk portion;
An operation disk portion having an engagement hole that engages with the bearing at the center, and further provided with an elongated oblong hole in the radial direction on the outer periphery of the engagement hole;
Rotation detection means for detecting the rotation direction and rotation speed of the rotation shaft, and generating the reproduction instruction signal based on the detected rotation direction and rotation speed;
A notch that engages with a slit formed in a direction orthogonal to the axis on both sides of the rotating shaft, and an operation disk portion mounted on the mounting portion formed in the bearing is provided between the mounting portion and the mounting portion. It has a holding part to hold and hold,
The holding portion includes a convex portion that engages with the oblong hole, the convex portion is fitted into the oblong hole, and the notch is fitted into a slit formed in the rotating shaft, and the operation disk portion An optical disk reproducing apparatus characterized in that the operation disk part is detachably engaged with the bearing by pressing in the direction of the mounting part. In the optical disk reproducing apparatus according to claim 1 or 2,
Provided on the outer periphery of the rotating shaft with an outer rotating shaft that can rotate coaxially with the rotating shaft;
The optical disk reproducing apparatus, wherein the outer rotating shaft includes a disk part, and a sheet member is sandwiched between the disk part and the operation disk part. The optical disk reproducing apparatus according to claim 3, wherein
The optical disk reproducing apparatus, wherein the outer rotating shaft includes an electric motor that rotationally drives the rotating shaft.

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