JPS606887Y2 - Pickup cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for efficiently cleaning a pickup applied to a video disc player or the like.

A pickup that extracts a signal by engaging a recording medium that densely records video and/or audio information, such as a video disk record, is strongly contaminated with dirt and the like during its operation, and its profile is deformed due to wear. There is a marked tendency to

Therefore, in general electromechanical conversion type video disc players, cleaning the pickup after playback is completed.
A re-polishing device is being installed.

FIG. 1 shows a model diagram of a conventional device of this type.

The pickup P is configured to be able to be transferred from the record R on the rotary table T to the polishing disk constituting the re-polishing device RP along the guide rail G, or in the opposite direction. The cleaning member C is made to collide with the cleaning member C at the same time.

This has a disadvantage in operability, as each time the pickup is cleaned, the pickup must be moved to a cleaning member provided outside the rotary table.

The present invention aims to provide a device that can clean the pickup without moving it outside the play area, that is, a device that cleans the pickup in relation to its proximity to and/or separation from the recording medium. It is.

The device of the present invention is basically transported in a direction across the tracks of a recording medium, and includes a support body that supports a pickup holder (described later), and is movably attached to the support body and can be moved close to or away from the recording medium. First, the support and the pickup holder will be explained with reference to FIG. 2.

Reference numeral 1 denotes a movable lever for moving the support 2 and the pickup holder 3 in the radial direction of the video disc. A movable body 5 having a pressing body 4 that can be rotated is rotatably attached to a support shaft 6.

7 is a pin for rotatably supporting the pickup holder 3.

In the pre-playback or post-playback state (non-playback state) shown in FIG.
On the other hand, as shown in the opening of the same figure, the pickup holder 3
By rotating the pickup 8, the pickup 8 can be brought into pressure contact with the video disc 9 as shown in FIG.

In FIG. 2 C, 2, 10 is a contact body provided on the movable body 5
This contacts the pickup holder 3 in the non-reproducing state to keep the pickup holder horizontal with the pressing body 4.

Although not shown in FIG. 2, the support 2 and the pickup holder 3 are provided with cleaning means that can clean the pickup 8 in conjunction with the rotation of the pickup holder 3.

This will be explained below with reference to FIGS. 3 and 4.

FIG. 3 is a side view with the support removed, showing the pickup holder 3 and the controlled section 11 constituting the cleaning means.

This controlled part 11 includes a rotating rod 13 pivotally supported by a pin 12 provided on the pickup holder 3, a spring 14 that urges the rotating rod to rotate clockwise when viewed from the arrow P in the figure, and a spring 14 that urges the rotating rod to rotate clockwise when viewed from the arrow P in the figure. The rotary rod 13 is further provided with an arm 17 having a cleaning portion 16 for cleaning the pickup 8 at its tip.

FIG. 3 shows a state in which the cleaning section 16 is just in contact with the pickup 8.

Note that this pickup has a stylus 18 as shown in the diagram,
It includes a cantilever 19 that supports this and a pickup case 20.

FIG. 4 is a front view of the apparatus as viewed from the direction of arrow P in FIG.

The support body 2 is provided with a control section 21 that constitutes a cleaning means together with the above-mentioned controlled section 11.

The control unit 21 includes a slider 22 movably attached to the support 2, and a guide pin 2 that engages with a long hole 23 provided in the slider to regulate the direction of movement of the slider.
4, and a spring 25 for pushing up the slider 22 obliquely upward (in the direction of arrow Q).

Here, FIG. 4A shows a non-regeneration state corresponding to FIGS.

Then, by operating the play button (not shown), the pickup holder 3 is pushed down in the direction of arrow R as shown in the opening in Figure 4, and the rotating rod 13 moves the slider 22 to the spring 2.
5 (arrow S), and then, when the two are no longer engaged, the slider 22 is returned to its original position as shown in the figure.

In this operation from A to C through the opening, the cleaning member 16 does not have any specific action on the pickup 8, but merely prepares for the next cleaning operation.

At this time, the rotating rod 13 is located below the slider 22, and the cleaning means maintains a stable state even in this state.

Further, the pickup 8 is in pressure contact with the video disc 9 and is in a reproduction state.

To end this playback operation, the pickup holder 3
When the is returned to the upper position, the rotating rod 13
comes into contact with the slider 22 and is rotated by the slider in a counterclockwise direction against the spring 14, and through this movement, the cleaning section 16 provided at the tip of the rotating rod rotates in the direction of arrow T and wipes off the pickup 8. do.

Further, when the pickup holder 3 is completely returned to its original position, the rotation rod 13 and the slider 22 are no longer engaged, and the rotation rod 13 is rotated clockwise by the spring 14, and as a result, the cleaning section 16 is moved to the pickup 8. Wipe away again, this time from the opposite direction U.

The cleaning means is then returned to the state shown in FIG. 4A.

This reciprocating movement of the cleaning section slides into contact with the stylus, which has a ridgeline in the direction in which the track extends, from both directions bordering the ridgeline, thereby further improving the cleaning effect.

From the structure of this cleaning means, it can be inferred that the cleaning operation is performed immediately before regeneration, and it is also useful to do so, but from the standpoint of cleaning effect, as in this embodiment, the cleaning operation is performed immediately after regeneration. It is better to do this.

This is because it becomes difficult to remove dust and the like attached to the stylus over time.

Either way, it's just a design issue. Although it is not impossible to perform the cleaning operation both immediately before and after regeneration, the mechanism for this would be considerably complicated, and the cleaning effect would not be improved much.

As described above, the present invention includes a support body that is moved in a direction across tracks of a recording medium, a first position that holds a pickup and is movably attached to the support body and is close to the recording medium; a pickup holder that assumes a second position separated from the slider; a slider having an inclined portion at one end and having a long hole; and a slider provided in the support body that engages with the long hole of the slider to move the slider to move the pickup holder. a guide pin that is inclined with respect to the direction and that the inclined portion supports movably in a direction in which the pickup holder moves from the first position to the second position;
a first spring stretched between the support body and the slider and urging the slider toward the second position of the pickup holder; and a first spring rotatably supported by the pickup holder during movement of the pickup holder. A rotary rod having a contact portion that contacts the inclined portion of the slider, a cleaning portion provided at the tip of the rotary rod, and a rotating rod suspended between the rotary rod and the pickup holder to move the rotary rod toward the support body. and a second spring provided on the pickup holder to restrict the rotating rod to a non-contact position where the cleaner portion does not contact the stylus of the pickup against the bias of the second spring. When the pickup holder moves from the second position to the first position, the rotation rod does not rotate due to the movement of the slider even if the slider and the rotation rod come into contact with each other, and the rotation rod does not rotate when the pickup holder moves from the second position to the first position. When moving from the first position to the second position, due to the contact between the slider and the rotary rod, the rotary rod first rotates from the non-contact position in a direction opposite to the biasing direction of the second spring. wiping the stylus with the cleaning section, and then wiping the stylus again as the slider and the rotary rod are released from contact with each other by the subsequent movement of the pickup holder to a second position, and the rotary rod returns to its original position. This pickup cleaning device is characterized by Since both surfaces and the running surface are wiped by the reciprocating movement of the cleaning section, cleaning can be facilitated.

(2) Rapid cleaning The pickup holder is equipped with a cleaning section,
Since cleaning is performed immediately after playback is completed to complete preparations for the next playback, any part of the disc can be cleaned without having to move the pickup to the cleaning device position outside the disc. Cleaning can be carried out quickly at the position, so that when a playback operation is performed over the playback position, the pickup can be cleaned in conjunction with the playback operation.

(3) In addition, since there is no need to provide a cleaning device at a position outside the disk, the moving distance of the pickup can be shortened accordingly, and the overall shape of the player can be made smaller.

In addition, since the stylus is wiped back and forth in the cleaning section that returns the pickup holder to the upper position to end the playback operation, the cleaning operation is performed using the originally necessary movement of the pickup holder. There is no need to provide a separate drive source for the movement, ie, the cleaning operation, and the configuration of the device is simplified.

[Brief explanation of the drawing]

FIG. 1 is a model diagram of a conventional player. FIG. 2 is for explaining the device of the present invention, and is shown in FIG. The mouth is a perspective view of the opening in different operating states, and Figures C and 2 are side views of a part of the pickup holder corresponding to the mouth of the same figure. FIG. 3 is a side view of the device with the support removed. FIG. 4 is a front view of FIG. 3 viewed from the direction of arrow P, showing different operating states. 8...Zekup, 9...Recording medium (
video disc), 2... support, 3...
...Pickup holder, 11, 12... Control section and controlled section constituting the cleaning means, 16...
...Cleaning department.

Claims (1)

[Scope of utility model registration request] a support that is moved in a direction across tracks of a recording medium; a first position close to the recording medium that holds a pickup and is movably attached to the support; and a second position that is spaced apart from the recording medium. a pickup holder having a slanted portion at one end and a long hole;
The supporting body is provided with an elongated hole of the slider that engages with the elongated hole of the slider to tilt the slider with respect to the moving direction of the pickup holder, and the inclined portion moves in the moving direction of the pickup holder from the first position to the second position. a first spring that is stretched between the support body and the slider and biases the slider toward the second position of the pickup holder; a rotary rod that is rotatably supported and includes a contact portion that comes into contact with an inclined portion of the slider during movement of the pickup holder; and a rotary rod that is stretched between the rotary rod and the pickup holder and moves the rotary rod toward the support body. a second spring for biasing; and a stopper provided on the pickup holder for restricting the rotating rod to a non-contact position where the cleaner portion does not come into contact with the stylus of the pickup, resisting the bias of the second spring. and
When the pickup holder is moved from the second position to the first position, the rotation rod does not rotate due to the movement of the slider due to the contact between the slider and the rotation rod, and the pickup holder is moved from the first position to the second position. When moving to the position, the slider and the rotary rod come into contact with each other, so that the rotary rod first rotates from the non-contact position in a direction opposite to the biasing direction of the second spring, and is moved by the cleaning section. The stylus is wiped off, and the stylus is wiped again by moving the pickup holder to a second position, whereby contact between the slider and the rotary rod is released, and the rotary rod returns to its original position. pickup cleaning device.