JPS5922201A - Automatic cleaner device for stylus - Google Patents

Abstract

PURPOSE:To remove automatically dust or the like adhered to a stylus during reproduction at the time other than the reproduction by polishing the stylus with a cleaning member with the revolution of the 1st turning member. CONSTITUTION:When a video disc is put on a turntable 13, a pickup arm 15 is located on the external peripheral part (no recording part) of the video disc and then moved to the diameter direction of the video disc to pick up a recording signal. A cleaner part 16 to be the main part of the titled device is fitted to the lower part of the pickup arm 15. An opening device 17 to expand the opening part (opening part for storing the video disc) of a jacket to be inserted is fitted to the inside of a jacket inserting inlet, and with the insertion/removal of the jacket 12, reciprocated between a position close to the jacket inserting inlet and a chucking device 14. A pin 171 with a roll is attached to the lower end and provided with a function to control the lifting operation of a disc receiving board.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic stylus cleaner device, for example, in a video disc grayer, which automatically removes dust etc. stuck to the stylus lath during performance after the performance is finished. .

[Technical Background of the Invention] In a video disc grayer, a stylus is generally brought into contact with the video disc to pick up signals recorded on the video disc. For this reason, dust tends to accumulate on the stylus during performance, which significantly degrades the quality of reproduced images.

[Purpose of the invention]

The present invention has been made in order to address the above-mentioned circumstances, and an object of the present invention is to provide an automatic stylus cleaner device that can automatically remove dust, etc. attached to a stylus during playback at times other than playback. .

[Summary of the invention]

Therefore, the present invention provides a first rotatable arm that is rotatably provided near the initial position of a pickup arm equipped with a stylus that picks up recording signals from a recording disk, and that is always biased in one direction by a first elastic member. a cleaning member provided on the first rotating member and located below the stylus; a first driving means for rotating in a direction opposite to the first driving means; and a first rotating member rotatably provided and always biased in one direction by a second elastic member; a second rotating member capable of rotating in the biasing direction of the second elastic member and positioning the first rotating member at a predetermined rotational position when rotated by the stylus; A switch that obtains the timing for lowering the member to the height position, and a switch that is rotatably provided and is always biased in one direction by a third elastic member, and when the switch is rotated in the opposite direction to the biasing direction. Driving the first switch and then rotating the second rotating member in a direction opposite to the urging direction by the second elastic member to release the position restriction of the first rotating member. a third rotating member; and a second driving means for rotating the third rotating member in a direction opposite to the biasing direction of the third elastic member in conjunction with the jacket removal operation. and when removing the jacket, the stylus is lowered to a height position of the cleaning member, and then the position restriction of the first rotation member is released, thereby causing the first rotation. The stylus is configured to be wiped by the cleaning member as the stylus is rotated.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic perspective view showing the inside of an example of a video disc player to which the present invention is applied. In the figure, 11 is a player main body, and a jacket insertion slot provided on the side surface thereof. A video disc (not shown) housed in the jacket 12 is inserted through the jacket 12 (in the direction of the arrow shown). A turntable 13 is provided at the center inside the player body 12, and a chucking device 14 is provided at the back in the jacket insertion direction. In addition, a pickup arm J5 is equipped with a stylus (not shown) on one side perpendicular to the insertion direction of the jacket 12.
is installed. The state indicated by the solid line in the figure indicates a state in which the playback has been completed and the pickup arm 15 is located at the initial position on the outer circumferential side of the video disc. When the video disc is placed on the turntable I3, the pickup arm 15 is located at the outer periphery (non-recorded area) of the video disc as shown by the broken line, and then moves in the radial direction of the video disc to pick up the recording signal. do.

A cleaner section 16 is provided below the pickup arm 15, which is the main part of the automatic stylus cleaner device that characterizes the present invention.

Further, an opening device 17 is provided inside the jacket insertion slot for widening the opening of the jacket to be inserted (opening for storing a video disc). The opening device 17 reciprocates approximately between the jacket insertion opening and the chucking device 14 in conjunction with the insertion and removal of the jacket 12. Opening device 1
7 is provided with a bin 171 with a roller at the bottom end. This bin 171 has a function of controlling the vertical movement of the disk holder 18 (see FIG. 2), as described in, for example, Japanese Patent Application No. 104973 filed by the applicant of the present patent. A detailed explanation will be omitted here.

In this embodiment, the bin 171 plays a major role in the operation of the cleaner section 16.

Here, the operation of the video disc player shown in FIG. 1 will be explained in connection with the insertion and removal of the jacket 12 with reference to FIGS. 2 to 9. It should be noted that FIGS. 2 to 9 are schematic representations and are simplified.

First, FIG. 2 shows the jacket 12 before it is inserted into the player body 11, and the turntable 13. Disc cradle 18. Chucking device 1
4. and an opening device 17, and further includes an elevating mechanism (not shown) for elevating and lowering the disk pedestal 18.

The turntable 13 has a video disc 19 (
Needless to say, the disc holder 18 is for supporting the video disc 19 before it is placed on the turntable 13. . In addition, the chucking device 14 is connected to the outer periphery (non-recording area) of the video disc 19 inside the jacket 12 and the lid grate 2° (a member that closes the opening 121 of the jacket 12 so that the video disc does not fall through the opening 121) ( (see Fig. 5), and has two fingers 141 and 142.
The lower finger 142 has a wire 2 such as a piano wire.
1, the tip is pulled. The opening device 17 opens the jacket 1 when the jacket 12 is inserted into the player body 11.
This serves to open the opening 121 of 2 and facilitate the ejection of the video disc 19.

Now, when the jacket 12 is inserted into the player body 11 through the jacket insertion opening 22 as shown in FIG. 3, it hits the opening device 17. Then, as it is pushed in, the opening 121 of the jacket 12 is expanded by the opening device 17 as shown in FIG. If the jacket 12 is further inserted in this state, it will collide with the disc pedestal 18, so the disc pedestal 18 is lowered by the aforementioned elevating mechanism as shown in FIG. Furthermore, when Jahkerat 12 is inserted deep, the 6th
Both fingers 141 of the chucking device 14 as shown
, 142, the outer periphery of the technical disc 19 and the lid grate 20 are gripped.

After this chucking, when the jacket 19 is pulled out, the video tape cover 19 and lid plate 20 are left behind in the player body 11, and the disc pedestal 18 is raised by the lifting mechanism as shown in FIG. The timing is such that the jacket 12 rises after passing over this pedestal 18.The video disc 19 is then supported by the pedestal 18.Furthermore, as shown in FIG. As shown in FIG. 9, the tensile force of the wire 21 is loosened, the lower finger 142 of the chucking device 14 rotates, and then the disc holder 18 descends and the video disc 19 becomes turntable. The lid grate 20 is supported upward by another means even after the lower fin rotates -142.

Thereafter, the big ag arm j5 moves from the playback end position shown by the solid line in FIG. 1 to the playback standby position shown by the broken line, the turntable 13 rotates, and a predetermined playback operation is performed.

To pull out the video disc 19 and lid grate 2o after the playback operation is completed, the disc holder 18 and lower finger 142 are raised to the state shown in FIG. 8.

When the empty jacket 14 is inserted in this state, as shown in FIG.
The state sequentially shifts to the state shown in FIG. 6, and the chuck is released. The chucking device 14 is such that when an empty jacket 12 is inserted, the chucking state of K is released, and after the chucking device 14 is released, the jacket 12 can be pulled out as shown in FIG.

4, 3, and 2, the video disc 19 and lid plate 20 are again stored in the jacket 12 and taken out.

Next, the cleaner section 16, which is a feature of the present invention, will be explained. FIG. 10 is a schematic exploded perspective view of the cleaner section 16, and FIG. 11 is a schematic perspective view showing the assembled state. In the figure, 25 is a cleaner paste, which is fixed to the main body chassis (not shown) with screws 26.

A swirl bar 27 is rotatably supported around the bin 28 as a fulcrum. A cam 3o is rotatably supported on the swirl bar 27 using the bin 29 as a fulcrum. This cam 3o is connected to a raised cut 31 formed in the cleaner paste 25.
The slide 79, one end of which is fixed to, is constantly biased clockwise in the figure by the tension spring 32 and is still stopped against the protrusion 33. In this case, the sweeper 27 is always biased counterclockwise by the sweeper tension spring 32. A cleaning member 34 for cleaning the stylus is provided on the upper surface of the cam 3o. 35 is a protrusion that restricts the counterclockwise rotation of the swivel z4-27.

36 is a stopper lever, and the bottle 37. It is rotatably supported on the cleaner pace 25 using the fulcrum as a fulcrum. This stopper lever 36 is provided with a stone i4 bin 37,
The stopper lever 36 is always biased clockwise by a spring 39 having one end fixed to the protrusion 38 so that the stopper pin 37 comes into contact with the inclined side 27 of the switch 27.

40 is a signal cam, and the bin 37. It is rotatably supported on the cleaner pace 25 above the stone 9 lever 36 with the fulcrum being the fulcrum. 41 is rotatably supported by the signal cam 40 with the bin 42 as a fulcrum.

This cam 41 is always urged counterclockwise by a signal cam spring 44 whose one end is fixed to a raised cut 43 of the cleaner paste 25, and its rotation is restricted by a projection 403 provided on the signal cam 4o. As a result, the signal cam 4o is always biased in the needle direction.

The outer circumferential surface of the signal cam 4θ is pressed against the protrusion 361 provided on the strut horn 4 lever 36.
6 in the counterclockwise direction, and a second operating section 402 for operating a movable contact piece 451 of the switch 45, which will be described later. The switch 45 is attached to the cleaner paste 25 via a switch attachment fitting 46. Note that the switch mounting bracket 46 is attached to the cleaner paste 25 with screws 48 so that the two prongs 461 are engaged with the bins 47. In this case, a convex hole 462 for adjusting the position of the switch 45 is provided at the corresponding position of the switch mounting bracket 46 and the cleaner paste 25.
251 is provided.

The mounting position of the switch 45 is adjusted by inserting, for example, a screwdriver 49 between the notch 1a of the hole 462 and the notch 2a of the hole 251, as shown in FIG.

This adjustment adjusts the timing at which the switch 45 is driven by the second operating section 402 of the signal cam 4o.

The operation in the above configuration will be explained. FIG. 13 is a schematic plan view of the cleaner section 16 viewed from above. The illustrated state shows the state after the jacket 12 has been removed from the player body 11. In this state, one end of the cam 30.41 is on the movement trajectory (line L) of the bin 171.

Now, when the jacket 12 is inserted, the bottle 17 moves toward the back of the player body 11, that is, in the direction indicated by the arrow, and hits the cam 30. When the bin 171 moves further, as shown in FIG. Sweeper tension Id 27 rotates clockwise against the elastic force of 32. As a result, the stopper lever 36 also rotates clockwise, and the bin 37 moves to S/J? : Located at the fourth part 272 of the outer peripheral surface of l7. As a result, Swee/4' 27 becomes bin 37.
The position is regulated to the state shown in the figure. Furthermore, bin 17
When the bottle 17 moves, this bottle 17 hits the cam 41, but in this case, only the cam 41 hits the bottle 1 as shown in FIG.
1. Just by being pushed by 71 and rotating clockwise. The signal cam 40 does not rotate.

When the jacket 12 is inserted at a predetermined position and then pulled out, the tube 17 will now move in the opposite direction to the direction indicated by the arrow. When the bottle 171 hits the cam 41, the cam 41 pushes the protrusion 403, so the signal cam 40 rotates counterclockwise against the elastic force of the signal cam spring 44, as shown in FIG. As a result, the movable contact piece 451 of the switch 45 is driven by the second operating section 402 of the signal cam 40.

Thereafter, as shown in FIG. 17, the protrusion 361 is pushed by the first operating part 401 of the signal cam 40, the stopper lever 36 is rotated counterclockwise against the elastic force of the stopper spring 39, and the sweeper 27 Remove location restrictions. As a result, the arm 27 rotates counterclockwise until it hits the protrusion 35 (see FIG. 10), returning to the state shown in FIG. 13. Furthermore, when the bottle 171 separates from the cam 41, the stone lever 36 and the signal cam 40 also move away from the 13th cam 41.
The state returns to the state shown in the figure. After this, the bin 171 is
However, in this case, as shown in FIG. 18, only the cam 3o rotates counterclockwise against the elastic force of the spring 32, and the suino and 27 do not move at all.

The cleaner section 16 operates in conjunction with the reciprocating movement of the bin 171 as described above, but this operation is performed twice: when loading the video disc 19 into the player body 1 and when removing it from the player body 11. can get. In this embodiment, the stylus is cleaned when the video disc 19 is removed from the player body 11. That is, in FIG. 19, 50 is a chuck detection switch that detects that the video disc 19 is chucked by the chucking device 14. This chuck detection switch 50 outputs a high level signal when the video disc 19 is released from the chuck. Furthermore, when the switch 45 is driven by the signal cam 40, it outputs a high level signal. The output of these two switches 45°50 is an AND circuit 51
The stylus is supplied to the stylus lifting device 52 via the stylus. This elevating device 52 moves the stylus to the video disc 1 during playback.
In this case, the stylus can be lowered even when the output of the AND circuit 51 becomes high level. Therefore, the video disc 19 loaded in the player main body 11 is stored in the jacket 12 and removed.
When taking out the stylus, the Ryokawa force of switch 45.50 becomes the no-i level, so the stylus descends. Furthermore, at this time,
The pickup arm 15 is in the playback end position as shown by the solid line in FIG. 1, and the stylus is in the cleaning member 34.
It is designed to descend upwards.

Therefore, after the switch 45 is driven, as shown in FIG. etc. are wiped off. Note that the stylus is designated by the reference numeral 53 in FIG.

When loading the video disc 19 into the player body 11, the video disc 19 will not be unzipped until the jacket 12 is removed. , the output of the chuck detection switch 50 does not go to high level, and the stylus 53 does not descend. Therefore, stylus 5
3 cleaning is not performed.

With this configuration, cleaning can be performed at a constant speed regardless of the speed at which the jacket 12 is inserted and removed. Furthermore, by setting a sufficient interval between the timing when the switch 45 is driven and the timing when the position restriction of the switch 45 is released, the cleaning operation can be performed after the stylus 53 has landed on the cleaning member 34. Cleaning operation becomes reliable.

Further, since the position of the switch 45 can be adjusted, timing for the cleaning operation can be easily determined.

Note that the present invention is not limited to the above embodiments; for example, by driving the stylus lifting device 52 using only the output of the switch 45, the video disc 1
The stylus 53 can be cleaned twice: when loading the stylus 9 into the player body 1 and when taking it out from the player book 311. Of course, the bottle 171 is not limited to the one with the opening device 17.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide an automatic stylus cleaner device that can automatically remove dust and the like attached to a stylus during playback at times other than playback.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the inside of an example of a video disc grayer to which the present invention is applied, and FIGS. 2 to 9 show the operation of the video disc grayer shown in FIG. FIG. 11 is an exploded perspective view of the cleaner section, which is the main part of the illustrated embodiment. FIG. 12 is a perspective view showing the same assembled state, FIG. 12 is a diagram for explaining the position adjustment of the switch shown in FIG. 11, and FIG. 18 are schematic plan views for explaining the operation of the cleaner section shown in FIG. 11 in relation to the movement of the pin of the opening device shown in FIG. 1, and FIG. 19 is a schematic plan view for explaining the lowering operation of the stylus. FIG. 11... Player body, 12... Jacket, 13
...Turntable, 14...Chucking device,
DESCRIPTION OF SYMBOLS 15... Big ag arm, 16... Cleaner part, 17... Opening device, 171... Bin, 18...
Disc holder, 19...Video disc, 20...
lid route, 121... opening, 141... upper finger, 142... lower finger, 21... wire, 22... jacket insertion port, 25... cleaner paste, 251... Hole, 26...Screw, 27...
Suino! , 271... Slanted side, 272... Concave portion,
28...bin, 29...bin, 3θ...cam, 3
1-... Cut and raise, 32... Sweeper tension spring, 33... Protrusion, 34... Cleaning member, 3
5...Protrusion, 36...Stopper lever, 361...
・Protrusion, 37...Stopper bin, 38...Protrusion, 3
9...Stopper spring, 40...Signal cam, 4
01...first operation section, 402...second operation section,
403...Protrusion, 41...Cam, 42...Bin,
43...Cut up, 44...Signal cam spring,
45...Switch, 451...Movable contact piece, 46...
・Switch mounting bracket, 461...Two prongs, 462...
- Hole, 47... Bottle, 48... Screw, 49... Driver, 50... Chuck detection switch, 51...
- AND circuit, 52... Lifting device, 53... Stylus. Applicant's agent Patent attorney Takehiko Suzue A! 5 Figure 6 Figure 7 Figure 8

Claims (3)

[Claims] (1) Load the recording disc into the playback device main body by inserting the jacket containing the recording disc into the playback device main body through the jacket insertion port provided on one side of the playback device main body, and then pulling it out. In a recording disc playback device configured such that the recording disc loaded inside the main body of the playback device can be taken out while being stored in the jacket by inserting and removing an empty jacket. , a first rotatable member rotatably provided near the initial position of a pickup arm equipped with a stylus for picking up recording signals from the recording plate, and always biased in one direction by a first elastic member; a cleaning member provided on the first rotating member and located below the stylus; and a cleaning member that is provided on the first rotating member and located below the stylus; a first driving means for rotating in a direction opposite to the biasing direction; and a first driving member rotatably provided and always biased in one direction by a second elastic member, the first rotating member being rotated in the opposite direction to the urging direction; a second rotating member capable of rotating in the direction of the biasing force of the second elastic member when rotated by a driving means to position the first rotating member at a predetermined rotational position; and the stylus. a switch for determining the timing for lowering the cleaning section to the height of the cleaning section; When the first switch is moved, the first switch is driven, and the second rotating member is then rotated in a direction opposite to the biasing direction of the second elastic member. a third rotary member capable of releasing the position restriction; and a third rotary member capable of releasing the position restriction of the jacket; and a second driving means for rotating the stylus, when removing the jacket, lowering the stylus to a height position of the cleaning member, and then releasing the restriction on the position of the first rotating member. An automatic stylus cleaner device, characterized in that the stylus is wiped by the cleaning member as the first rotating member rotates. (2) The first drive means is a drive bin provided in the opening means that expands the opening of the jacket inserted through the jacket insertion port and moves in the jacket insertion/removal direction in this state. and a first rotating member attached to the first rotating member so as to be rotationally driven by the drive bin.
a cam, and only when the jacket is inserted, the rotational movement of the cam is transmitted to the first rotational member to rotate the rotational member in a direction opposite to the biasing direction of the first elastic member. a first cam means movable, the second drive means comprising a second cam mounted on the drive bin and a second pivot member mounted on the third pivot member so as to be rotationally driven by the drive bin; cam, and only when the jacket is removed, the rotational movement of the cam is transmitted to the third rotational member so that the rotational member is biased in a direction opposite to the biasing direction of the third elastic member. 2. The automatic stylus cleaner device according to claim 1, further comprising a rotatable second cam means. (3) Playback is performed using the output of a switch that detects that the recording disc is stored in the jacket and is taken out from the main body of the playback device, and the output of a switch that obtains the lowering timing of the stylus. 2. The automatic stylus cleaner device according to claim 1, wherein the stylus is wiped by the cleaning material only when the recording disk is removed.