KR850001006B1 - Disc player having disc stabilizing apparatus - Google Patents

Abstract

This apparatus relates to the player used in transfers between the receiver device and a turntable. In a video disk, the turntable spindle is held in a raised position, such that it is maintained in engagement with the record center hole when the turntable is lowered to transfer a spinning record from the turntable to the receiver pad. A mechanism, responsive to the insertion of an empty jacket into the player, retracts the spindle to allow insertion of the jacket into the player and keept it from interference with the spindle.

Description

Disco record player device

1 is a perspective view of a video disc player operating with a spindle recovery device according to the present invention.

2 shows a video disc box suitable for use with the spindle recovery device of FIG. 1 in practicing the present invention.

3 is a plan view of a video disc player, showing the main shaft recovery device of FIG.

4 is a cross-sectional view of the spindle recovery device of FIGS.

FIG. 5 is a perspective view of the spindle recovery device of FIGS. 1, 3, and 4. FIG.

6, 7 and 8 illustrate the operation of the assembly included in the configuration of the spindle recovery apparatus of FIGS. 1, 3, 4 and 5;

The present invention relates to a disc record player and more particularly to a player carried between a disc record receiving device and a turntable.

In some systems, video information is stored on disk records in the form of geometric variations in successive spiral tracks placed on the record surface. The change in capacitance between the record and the conducting characteristics of the electrode carried by the needle engaging the record is sensed to reproduce the stored information. A capacitive video disk system is illustrated by way of example in U.S. Patent No. 3,842,194 (Clemens).

In order to protect the video disc record, it is desirable to place the video disc record in a box containing a sub-jacket with the spine holding the record. The entire box is inserted into the entrance provided in the player for loading the record. A record extraction device disposed in the player removes the record / spine assembly from the jacket to retain the record / spine in the player during subsequent jacket extraction operations. The retained record / spine assembly is supported on a set of receiving pads in the player. The turntable is raised relative to the receiving pad to transfer the record to the turntable for playback. The record player is provided with a hold-down member that positions the held spine in place and causes the record held by the turntable to be picked up when the turntable is raised. During playback, the pick-up needle moves radially across the record while the turntable rotates the record at a predetermined speed (eg 450 rpm). By lowering the turntable relative to the receiving pad to bring the record / spine assembly back to its original position, the blank jacket is inserted into the player after the record is transferred back to the receiving pad so that the record / spine assembly is returned back into the jacket. The box is extracted from the player and the record becomes available. For example, the record is undone by extracting the box from the video disc player of the type mentioned above. See, for example, US Pat. No. 4,196,906 to Leslie Atorington, entitled “Video Disc Player”, as an example of a video disc player of the type mentioned above.

In such a system, the record that keeps spinning when the turntable is lowered to transfer the retained record to the receiving pad is placed on the receiving pad to escape from the retained spine and thus prevents the record from being undone. The present invention overcomes this misaligned state of records.

According to the invention a main axis centering the record is settled for relative motion independent of the turntable along a passage parallel to the axis of the turntable. When the turntable is lowered to transfer the record from the turntable to the receiving pad, the spindle is engaged with the center hole of the record so that the record and the spine are aligned as the record is received in the spine.

In accordance with a feature of the present invention the spindle is retrieved in response to inserting the box into a position behind the box insertion passage in a manner of inserting the box without interference with the main shaft. According to this characteristic, the pull down ring is pivotally supported with respect to an axis disposed perpendicular to the turntable axis on a frame arranged below the turntable. In turn, the support frame moves between the raised and lowered positions. When the cover is inserted into the player, the active member moves the support frame carrying the pull down ring to the lowered position. A pair of yoke members fixed to the main shaft and having end portions arranged under the pull-down ring to engage the segments of the main shaft portion arranged oppositely retract the main shaft when the cover is inserted into the player.

The main shaft can be recovered regardless of the position of the yoke members relative to the pull down ring. The split yoke device facilitates assembly operation.

The video disc player 20 is shown in FIG. The function lever 22 is arrange | positioned at any one of three positions with off play loading / unloading. The door lid closes the box inlet 24 when the function lever 22 is in the off and play positions. When the enable lever 22 is in the loaded / unloaded position, the door lid is opened so that the box shown in Fig. 2 is inserted into the player so that the record held in the box is loaded. Push button 28 is provided to allow the player to be in a "stop" form. A set of pushbuttons 30, 32, 34, and 36 allow the player to have four "find" forms: quick access (forward / reverse) and visible stop, load / unload and end of operation. Other functions such as The pair of display lights 42 are operated to display one side, two sides, etc. of the surface of the record to be activated. The door 44 is placed on the player's cover to access the needle cartridge 46 (FIG. 3).

A video disc box 26 suitable for use with the player device as shown in FIG. 2 includes a jacket 50 having an open end and a spine 52 that is substantially flat and holds a record. The spine 52 has a portion 54 that acts as a closure when the spine is fully inserted into the jacket and a portion 56 having a circular opening 58 for receiving the record 60. Also provided with spine 52 are latch fingers 62 and 64 integrally formed to bend. The protruding elements 66 and 68 are received in grooves 70 and 72 disposed in the jacket 50 to engage the spine 52 when the spine 52 is fully inserted into the jacket.

The operation of the box extraction device will first be described with reference to FIG. A box is inserted into the inlet 24 along the passageway defined by guideways 80 and 83 to load the record into the player. When the box reaches the fully inserted position in the player, the latch release members 84 and 86 release the jacket 50 to release the spine latch fingers 62 and 64 to free the spine 52 from the jacket. ). When the box reaches the fully inserted position in the player to force the spine into the player, the spine catches 88 and 90 received in each of the holes 92 and 94 arranged in the spine 52 Pivoted within. Since the spine 52 is released from the jacket 50 by the operation of the latch release members 84 and 86 and the operation of the spine engaging members 88 and 90 is engaged in the player, the next extraction operation of the jacket is performed. Leave the spine assembly in the player. The spring loaded receiving pads 96, 98, 100, 102, and 104 accurately place the held spine / record assembly in the player. The catching arm 106 carrying the spine catching members 88 and 90 and the pair of springs (not shown) disposed between the latching release members 84 and 86 (not shown) are latch release members while the jacket is being extracted. Tilt downward.

In order to transfer the held record to the turntable 108, the function lever 22 is moved to the operating position so that the turntable is raised in turn and the turntable motor 110 is operated. A set of hold down members 112, 114, and 116 is placed in place of the retained spine 52 with respect to the receiving pads 96-104, and the retained record is retained when the turntable is raised. To be picked up by the turntable 108. The holddown members 112-116 also accurately place the held spine 52 in the longitudinal and transverse directions within the player. The pick-up needle 118 is slowly lowered onto an information track placed on the record by a needle lifter 120 (e.g., needle lifter of the type described in US Pat. No. 4,053,161) mounted in the carriage 11. Goes. The pickup needle 118 is disposed at one end of the needle arm 124. The other end of the needle arm 124 is secured to the cartridge 46 by a rubber connector 126. The needle 118 is selectively lowered to engage the record through the holes 128 disposed in the lower wall of the carriage 122. During playback, the carriage 122 is moved in response to the radial movement of the pick-up needle 118 inwards on the guide rails 130 and 132 disposed parallel to the box guideways 80 and 82. It moves from the starting position behind it to the front of the player and in the direction in which the box is placed opposite to the direction of insertion into the player. The reproduced signals are processed to be reproduced as standard television signals containing video and sound information for application to a television receiver.

After playback, the functional lever 22 is moved back to the loaded / unloaded position to transfer the record back to the receiving pads 96-105, which in turn lowers the turntable 108 to a lower level than the receiving pad. Records that continue to rotate when the turntable 1088 is lowered are placed on the receiving pads 96-104 to be received in the holes 58 disposed in the spine 52. The turntable motor 110 does not operate when the function lever 22 is placed in the loaded / unloaded position. An empty jacket 50 is inserted into the player along guideways 80 and 82 through the inlet 24 to undo the record / spine assembly. When the jacket 50 reaches the fully inserted position in the player, the front edge of the jacket engages the latch release member that is already inclined to tilt the latch release member further downward. As the latch release member is further inclined downward, the spine catching members 88 and 90 are sequentially moved downward to release the spine 52 from the player. When the jacket 50 is fully inserted into the player, the spine latch fingers 62 and 64 bite back into the grooves 70 and 72 so that the spine 52 is caught in the jacket. The record / spine assembly is extracted from the player when the box is extracted.

As mentioned earlier, when the turntable 108 is lowered to place a record on the receiving pads 96-104, the spinning record is about to escape from the hole 58 in the spine 52 disposed on the receiving pad. It is difficult to accommodate the record properly for the spine. A main shaft recovery device 140 will be described with reference to FIGS. 4 to 8.

4 and 5, tubular shafts 142 in which the turntable 108 is journaled for rotation and transmission in a bearing housing 144 fixedly mounted to the player's substrate 146. ) Is fixed. The main shaft 148 for centering the record is mounted on the pin 150 received in the center hole of the turntable 108. It can be seen that the main shaft 148 is disposed coaxially with the turntable 108 and performs rotational and transmission motions independently of the turntable. The rising position 152 and the falling position 154 of the main shaft 148 are respectively shown in FIG. 4 by dashed lines and solid lines. The bias spring 156 arranged between the follower 158 and the spindle pin 150 disposed on the turntable shaft 142 raises the spindle 148 toward the raised position 152.

Peripheral grooves defining the neck portion 160 accommodated in the holes defined by the cutting holes 161 disposed in the pair of yokes 162 and 164 in the manner shown in FIGS. 150). End portions 166 and 168 of yoke 162 and 164 are connected through holes 170 and 172X facing in turntable 108. End portions 166 and 168 of yoke 162 and 164 are received under pull-down ring 178. The pull-down ring 178 is pivotally mounted on the C-shaped frame 180, which in turn is pivoted to the player's substrate 146 by a pair of axes 182 and 184. Is fixed. The pivot axis of the pull-down ring 178 and the mold 180 of the form is actually perpendicular to the turntable side.

As shown in FIGS. 3 and 5, the drive cam 186 has a portion 190 disposed on the cam 186 and the front edge 188 of the box 26 so that the cam goes over when the box is inserted into the player. It is pivotally mounted adjacent to the box guideway 80 to engage. A rocker arm 192 pivotally mounted to the player's substrate 146 has one end connected to the C-shaped frame 180 and the other end fixed to the drive cam 186 by a connecting link 194. Has The return spring 196, which is arranged between the boss 198 fixedly disposed on the substrate 146 and the rocker arm 192, biases the drive cam so that the drive cam is normally placed in the box insertion path. The drive cam 186 is raised when the box 26 is inserted into the player, and the pull down ring 178 is pressed and the main shaft 148 is recovered when the drive cam 186 is raised.

A pair of protrusions 200 and 202 are provided to the pull down ring 178 and the protrusions 200 and 202 together with the stops 201 and 203 arranged on the player's substrate 146. Limit the upward motion of. A felt ring 204 is attached to the pull down ring 178. The felt ring 204 contacts the bottom of the turntable 108 when the turntable is lowered to reduce the speed of the turntable. The position of the stops 201 and 203 is such that the felt ring 204 disposed on the pulldown ring 107 is fixed from the turntable 108 when the turntable is in a raised position such that the turntable rotates without interruption by the pulldown ring. The position where the spacing is maintained.

An operation of the spindle recovery device 140 will be described with reference to FIGS. 1 to 8. The record / spine assembly is placed on receiving pads 96-104 when the record / spine assembly is loaded into the player. The turntable 108 is raised by moving the function lever 22 to the operating position to transfer the record to the turntable. The device used to raise or lower the turntable 108 includes the sliding device 206 shown in FIG. The turntable motor 110 is driven to start continuous playback, the needle 118 is lowered onto the record and the carriage 122 is driven so that the needle tracks across the record. During playback, the turntable 108 rotates the record at a predetermined speed (e.g., 450 rpm).

The function lever 22 is moved back to the loaded / unloaded position to lower the turntable 108 by the sliding device 206 to a position below the level of the receiving pads 96-104. Records that continue to spin when turntable 108 is lowered are placed on receiving pads 96-104. The bias spring 156 holds the mounted spindle 148 in an elevated position 152 that engages the record center hole for movement independent of the turntable. This interlocking of the record and the main axis allows the record to be properly aligned and received in a hole 58 disposed in the spine 52 to form an assembly of the record and spine. Reduce the speed of the friction contact source record between the rotating record and the adjacent stop surface. Felt ring 204 disposed over pull-down ring 178 contacts the underside of turntable 108 to stop the turntable.

An empty jacket 50 is inserted into the inlet 24 along the guideways 80 and 82 to undo the record spine assembly. Receiving pads 96-104 guide the record / spine assembly into the box guide to facilitate the return of the record / spine assembly into the jacket 50 in the same state as when the jacket 50 was inserted into the player. Arrange exactly in line with (80) and (82). When the jacket 50 is inserted into the player, the jacket can be inserted into the player without interfering with the main shaft by lifting the drive cam 186 so that the tip 188 of the jacket 50 recovers the main shaft 148. After the box 26 has been fully inserted into the flare, the record / spine assembly is returned to its original state by extracting the box 26 from the player.

In one embodiment of the spindle recovery device, the recovery of the spindle 148 is independent of the angular position of the yoke 162 and 164 with the spindle mounted relative to the pull-down ring 178. This is because the pivot mounted and self-aligning pull down ring 178 rotates until it engages with the yokes 162 and 164 before withdrawing the spindle 148.

In addition, the split yoke configuration of the spindle recovery device facilitates the operation of the assembly in the manner indicated in FIGS.

It will be appreciated that yokes 162 and 164 are not firmly secured to spindle pin 150 but are loosely caught in the peripheral grooves disposed over the spindle pins. This allows the main shaft 148 to rotate freely with respect to the turntables 108, yokes 162 and 164 so that the rotational speed of the record is equal to the rotational speed of the main shaft. It is important to equalize the rotational speed of the record and the main axis during record deceleration and acceleration to prevent wear of the record center hole when there is a speed difference between the record and the turntable 108.

The present invention has been described in connection with a capacitive video disk system. It will be appreciated that the invention described and claimed in the present application can equally apply to any system requiring movement of the spindle independent of the turntable.

Claims (1)

A record player which reproduces information recorded in a record having a center hole, the turntable rotatably supporting the record, a center hole of the record installed to align the center of the record with respect to the turn table; A disc record player device comprising a main shaft installed coaxially with a turntable, the record receiving device supporting a record held in the player and a device for transferring the retained record between the turntable and the record receiving device, wherein the axis of the turntable A spring 156 biasing the pin 150 mounted on the spindle 148 relative to the turntable 108 and coupled to the turntable 108 when the record is lowered so as to move independently of the turntable along a path parallel to the turntable 108. And records are guided to the player through the entrance 24 A drive cam 186 having a portion 190 connected by the tip portion 188 of the ruler 26, a rocker arm 192 connecting the cam with the C-shaped frame 180, and a main shaft connected to the main shaft. And a yoke (162, 164) having ends (166, 168) configured to be coupled to a pull down ring (178) for retrieval.

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