JPH026499Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to record players such as video disc players.

(B) Prior Art Some conventional video disc players have a pickup that comes into contact with the video disc, while others do not. In the former case, the pickup touches the video disk and moves relative to it.
Dust attached to the video disk (including the record material cut by the pick-up) is deposited on the pick-up. Since accumulated debris can act to prevent the pickup from operating properly, video disk players of this type are usually equipped with a pickup cleaning device. In a VHD video disk player, a cleaner velvet is placed in the path of transporting the pick-up from the land position (the outermost playback position of the record) to the rest position, and at the position where the velvet is deployed, the pick-up stylus is projected downward by a magnet. Then, the velvet is moved relative to the pick-up stylus to wipe away the dust. However, in this wiping method, the direction in which the dust accumulates with respect to the pick-up stylus is almost perpendicular to the direction of wiping, and the force for wiping away the dust depends on the transfer speed when the pick-up returns to the rest position, so it cannot be increased. Due to various reasons, it was not possible to remove the dust sufficiently. The remaining dust has the drawback of making the pick-up playback operation inappropriate and making it impossible to provide a good playback image on the screen.

(c) Purpose of the invention The object of the invention is to provide a record player that can sufficiently remove dust adhering to the pickup and that does not cause deterioration in image quality due to dust remaining on the screen.

(d) Structure of the invention The present invention makes the pick-up stylus protrude from the arm cage while the arm cage supporting the pick-up cart cartridge is being transferred from the land position to the rest position, and then the arm The present invention is characterized in that a cleaner means controlled by the movement of the cage is brought into sliding contact along the direction in which the track extends. Therefore, the present invention includes an arm cage 1 for supporting a pick-up cart cartridge and transporting the pick-up cart cartridge to a rest position, a land position, and a record play area, a power source 2 for driving the arm cage, and a power source 2 for driving the arm cage. a first control means 3 for projecting a pick-up stylus from the arm cage while the arm cage is being moved from the land position to the rest position; Further, there is a cleaner means 4 which is controlled in conjunction with the conveying operation and slides into sliding contact with the ejected pick-up stylus along the track extension direction, and which is attached to the cleaner means and is biased in a direction against the interlocking control. and a second control means 6 which is controlled at the rest position and stops the movement of the arm cage.

(E) Embodiment Fig. 1 is a schematic perspective view of the record player of the present invention, with the arm cage between the land position and the rest position, with the lid opened for explanation, and Fig. 2 shows the arm cage in the rest position. FIG. 3 is a partial side view of the record player in the state shown in FIG. 2 (the chassis is shown in cross section), and FIG. 4 is a diagram for explaining the operation. It is a time chart.

The arm cage 1 is configured to receive power from a power source 2 and move back and forth along rails 11 and 12, so that the pick-up P can be freely transferred between the rest position I and the innermost circumferential area of the record. There is. Arm cage 1 is housing 1 that constitutes a preamplifier.
3, a base 17 having coil groups 14, 15, 16 for tracking and time axis correction of the pick-up, and a holder 18 for supporting the pick-up P so that it can be attached and detached, and centered around a support shaft 19 with respect to the base 17. It is provided with a rotatable lid 20 and an opening 21 for lowering the stylus S of the pick-up P below the arm cage. The lid 20 is also provided with a drive coil 22 for applying a descending or ascending force to the stylus S. Reference numeral 23 denotes a latch for engaging and disengaging the lid 20, and when the lid 20 is locked, a cantilever C having a stylus S at its tip is arranged between the coil groups, and the stylus S faces the aperture 21. Become. Although the reciprocating movement of the arm cage 1 is only possible when the lid 20 is locked with the latch 23, the lid 20 is shown opened in FIG. 1 to make the pickup state clear.

The first control means 3 includes a switch 31 that is turned on when the arm cage 1 moves from the land position (the position where the pick-up faces the outermost track of the record) to the rest position, and is driven by this switch to lower the stylus. The drive coil 22 is provided with the drive coil 22 to cause the drive coil to move.

The cleaner means 4 includes a lever 43 that is rotatably supported by a hinge 42 that is erected on a chassis 41, and a side wall 24 of the arm cage 1 that is erected on the lever.
Cut and raised pieces 44 arranged so as to be able to abut against each other
and a brush 45 attached to the lever and rotating together with the lever in the lower area of the arm cage 1,
Further, the lever 43 is provided with a stopper 46 that restricts the amount of rotation of the lever by abutting against the chassis 41. The elastic body 5 is a lever 43
The lever 43 is stretched between the lever 43 and the chassis 41 in order to bias it counterclockwise.

Immediately before the arm cage 1 reaches the rest position, the side wall 24 abuts against the cut and raised piece 44, and the lever 43 is moved counterclockwise against the biasing force of the elastic body 5 due to the force of transport toward the rest position. Direction (arrow Q direction)
The brush 45 can be brought into sliding contact with the stylus S already protruding below the arm cage 1 from the direction in which the track extends (see FIG. 2).

The second control means 6 is a switch that detects the arrival of the arm cage 1 at the rest position, and the operation of this switch releases the power supply to the drive coil 22, and the elastic restoring force of the base of the cantilever C releases the power. It is returned to the position (see the two-dot chain line in Fig. 3).

The operation of the present invention will be supplementarily explained with reference to the time chart shown in FIG. When the player issues a stop command to cancel the play operation while in the play mode, in response to the command pulse A, the power source 2 is commanded to output return power (B ₁ ). As a result, the arm cage 1 is moved beyond the land position toward the rest position. Before this, it goes without saying that the drive coil 22 is controlled to lift the pickup upward from the record, but a detailed explanation thereof will be omitted. During this transfer, the arm cage 1 drives the first control means 3 to turn on the switch 31 for a period (T ₁ ) until the arm cage is returned from this intermediate position to the land position again (Fig. 4). C). The drive coil 22 is energized by activation of the switch 31, and the stylus S is energized downward in the arm cage 1 (D in the figure). When the arm cage 1 reaches the rest position, the second control means 6 is activated and the drive coil 22 is activated.
The energizing force is released and the pick-up P is returned to the normal position (E in the same figure). Immediately before this arrival, the stylus S is cleaned with the brush 45 as described above. When a command (F in the figure) is given to put the player back into the play mode, the arm cage 1 receives power (B ² ) from the power source 2 for driving in the forward direction and is moved toward the land position. Immediately after the start of transfer, the on state of the second control means 6 is released,
Further, when passing the above-mentioned intermediate position, the first control means 3
The on state of is also released.

(f) Effects of the invention The present invention allows the pick-up stylus to protrude from the arm cage while the arm cage is on its way to the rest position, and also causes the cleaner means to track the stylus in conjunction with the movement just before the arm cage returns to the rest position. Since the stylus is brought into sliding contact from the extending direction, dust and the like on the stylus can be effectively removed.

In addition, since the stylus is cleaned using a cleaner attached to a lever operated by the arm cage, the transfer speed of the arm cage is not limited, and the lever design allows the cleaner to be moved at any speed, providing the necessary wiping force. can be obtained easily.

[Brief explanation of the drawing]

The drawings are all related to the present invention; Fig. 1 is a perspective view showing the arm cage being returned to the rest position with the lid opened, unlike the actual situation, and Fig. 2 shows the cleaner means and pick-up at the rest position. FIG. 3 is a side view at the time of completion of cleaning by the cleaner means, and FIG. 4 is a time chart for explaining the operation. Explanation of main drawing numbers, 1...Arm cage, 2...
Power source, 3, 6... First, second control means, 4...
cleaner means.

Claims (1)

[Scope of utility model registration request] an arm cage for supporting a pick-up cart cartridge and transporting the pick-up cart cartridge to a rest position, a land position, and a record play area; and a power source for driving the arm cage;
a first control means for causing a pick-up stylus to protrude from the arm cage while the arm cage is being transferred from the land position to the rest position; a cleaner means that is controlled by the first control means and slides in sliding contact along the track extending direction with the pick-up stylus that is completely projected from the arm cage by the action of the first control means, and attached to the cleaner means;
A record player comprising: an elastic body biased in a direction opposing the interlock control; and second control means controlled at the rest position to stop the movement of the arm cage.