JPS63206971A - Pickup driving device for disk player - Google Patents

Abstract

PURPOSE:To prevent the occurrence of backlash in intermesh and the positioning slippage of a pickup by supporting a rack under meshing with a feed screw turnably in the vertical direction against a feed screw member by a pickup member and bringing the rack into pressurized contact with the feed screw by an energizing member. CONSTITUTION:The rack 49 is supported by the pickup 37 movably in the vertical direction against the direction of the pickup movement driven by the feed screw 46, which is energized by the energizing member 60 to mesh the rack 49 with the free screw 46. Therefore, the rack 49 and feed screw 46 have a thread profile of triangular cross-sectional shape respectively, and are affected by a force to float up, but because of the energizing member 60 being energized against this force, both are always deeply and accurately meshed with each other In this way, the pickup 37 is accurately moved in thee tracking direction by the rotation of the feed screw 46 without any positional slippage due to a group of vibrations.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a disc player for playing audio discs called video discs and compact discs, and is used to read signals recorded on discs. , relates to a pickup drive device that moves a pickup member for reading signals in the tracking direction of a disk.

[Conventional technology]

A conventional pickup drive device for this type of disc player is shown in FIG. 27, and will be described below.

A rack 103 is fixed to the tip of a leaf spring 102 fixed to a pickup member 101 that moves along a guide rail on a carriage plate on which a spindle etc. is mounted, and this rack 103 is meshed with a feed screw 104.
The rack 103 is moved by rotation, and the pickup member 101 is sent in the tracking direction.

[Problem that the invention seeks to solve]

Since the feed screw 104 and the rack 103 are threaded with a triangular cross section, the rack 1 of the feed screw 104 is
The driving force for 03 produces a vertical component of force that forces the rack 103 away from the feed screw 104 with respect to the axis of the feed screw 104.

As a result, the rack 103 may float up against the bias of the leaf spring 102, causing play in the engagement with the feed screw 104.

Furthermore, if vibrations or the like are applied during driving, the rack 10 is combined with the component force described above to twist the temporary spring 102.
3 may float up in the moving direction, and the position of the pink amplifier member may deviate from a predetermined position.

[Purpose of the invention]

In order to solve the above-mentioned problems of the conventional big amplifier drive device for a disc player, the present invention has been developed by press-contacting a feed screw member and a rack provided with a rotation fulcrum, so that the rack lifts up from the feed screw member. The purpose is to prevent looseness in the mesh and misalignment of the pickup.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention has a rank that engages with a feed screw member rotatably supported by a pickup member in a direction perpendicular to the feed screw member, and presses the rack against the feed screw with a biasing member. The gist is that.

[Embodiments of the invention]

An embodiment of the present invention will be described with respect to a multi-disc player shown in FIG. 1 and the following drawings.

As shown in Fig. 3, this multi-disc player is suitable for being carried in a car.A player body B is mounted in the trunk A of the car, and a magazine C is inserted into the player body B. ing.

This magazine C has a plurality of disks placed +1iC rotatably supported on a shaft C2, and each disk placement plate C1 carries one disk D, and the required disk placement plate C1 By rotating around the axis C2, a desired disc D is placed in the player body B.

This player body B is connected by a cable E to a remote control device F installed on a dash board A2 of an automobile A.

The remote control device F selects a desired disc game from among the plurality of discs D in the magazine C, transfers the disc D from the magazine C to the player body B, and plays it.

The case C1 of this magazine C has a hole CS drilled on one side near the shaft c2, and from this hole CS, the disk mounting plate C4 on which the desired disk D is placed is pushed. , and push it out of the case C1 as shown in the figure.

Further, the case C1 is provided with a recess C4 for locking the case C1.

Next, the configuration of the player body B will be explained.

Reference numeral 1 denotes a frame that becomes box-shaped by attaching the upper plate 1a, and the left and right side walls thereof have shafts i that protrude toward the inner surface.
b, and a vertically elongated guide hole 1c.

Horizontally long guide holes 2a of slide plates 2.3 are inserted into the shaft 1b on the left and right sides, respectively, and the slide plates 2.3 can slide back and forth along the side walls of the frame 1.

One slide plate 2 is formed with two stepped cam holes 2b, and the other slide plate 3 is formed with one similar cam hole 2b, and the same number of holes as the disk mounting plate C1 of the magazine C. A flat mark 4 is provided in which marks are formed in one horizontal row.

Reference numeral 5 designates a magazine holder that becomes box-shaped by attaching the upper plate 5a to the left and right side plates 5c and 5d attached to the lower plate 5b. One bottle 5e is horizontally erected on the side.

These pins 5e pass through the cam holes 2b of the slide plates 2 and 3 and are inserted into the guide holes 1c of the frame 1, so that the magazine holder 5 does not move in the front-rear direction and is supported at three points horizontally. is maintained.

A rank 2c is engraved on the upper surface of the slide plates 2 and 3, and gears 5a and 5 are connected by a single shaft 6.
b are engaged with the racks 2C of the slide plates 2 and 3, respectively.

A motor 7 is attached to the upper plate 1a, and a plurality of reduction gear mechanisms 8 reduce the rotational speed and transmit it to the gear 6b. When the gears 5a and 5b rotate, the rack 2C meshing with them moves back and forth. When driven, the slides #iE2 and #iE3 slide in the front-rear direction with the guide hole 2a being guided by the shaft 1b.

Further, a photo sensor P is mounted on the upper plate 1a with the mark plate 4 in between.
1 is installed.

The magazine holder 5 includes an upper plate 5a, a lower plate 5b, a side plate 5c,
A magazine C can be inserted into the upper plate 5d, and an arm 9 is pivotally supported on the upper plate 5a, and a spring 9a is mounted on the arm 9.

When the magazine C is inserted into the magazine holder 5, the tip of the magazine C hits the bent portion 9b of the arm 9 and rotates it.

On the upper plate 5a, when the arm 9 is rotated in this way,
A switch SW1 operated by arm 9 is attached.

A rotating arm 10 is pivotally supported on the lower plate 5b, and its bent piece 10a passes through the long hole 5r of the lower plate 5b and protrudes from the upper surface of the lower plate 5b. The rotating arm 10 is rotated by being pushed by.

A spring 10b is mounted on the rotating arm 10 in a direction to push back the magazine C, and a resistance gear 11 is meshed with the gear 10c of the spring 10b. When the magazine C is pushed out from the magazine holder 5, the resistance gear 11 slows down the rotating arm 10 and weakens the ejection speed of the magazine C.

Reference numeral 12 designates a locking arm that is pivotally supported by the side plate 5c, and a spring 12a is mounted on this locking arm so that the locking end 12b thereof is urged to protrude into the magazine holder 5.

The other end 12c of the locking arm 12 is in contact with the recess 2d of the slide plate 2, as shown in FIG. , the locking end 12b of the locking arm 12 is retracted from inside the magazine holder 5.

Reference numeral 13 denotes a second slide plate that slides back and forth along the side wall of the frame 1, with a horizontally long guide hole 13a being guided by a shaft provided on one side wall of the frame 1.

A rack 13b is carved on the side surface of the slide plate 13, and one end of a clamper press-down cam 14 pivotally supported on the lower surface of the frame 1 is pivotally attached to a connecting portion 13C, so that the slide plate 13 can slide. Then, the clamper pressing cam 14 rotates.

Furthermore, a motor 15 is attached to the lower surface of the upper plate 1a,
A worm 15a attached to the rotating shaft meshes with several stages of reduction gear mechanisms 16.

Reference numeral 17 denotes a push-out arm that is rotatably supported on the shaft of the upper plate 1a and rotates the disk mounting plate Ct of the magazine C. Coaxially with this push-out arm, an inner gear 18a and an outer gear 18b are mounted on a cylindrical annular surface. A shaft portion 18C of a double-sided gear 18 formed on both surfaces is rotatably supported.

A small gear 19 is rotatably fitted to this shaft portion 18C,
A planetary gear 20 is pivotally supported on the shaft portion 17a of the push-out arm 17, and is meshed with the pinion 19 and the internal gear 18a, and is movable around the pinion 19 as the push-out arm 17 rotates.

The pinion 19 meshes with the reduction gear mechanism 16, and the rotation of the motor 15 is transmitted thereto, but when the rotation of the external gear 18b is blocked, the planetary gear 20 shifts around the pinion 19, When the push-out arm 17 is prevented from rotating, the double-sided gear 18 rotates.

The external gears 1s bt, t are meshed with an intermediate gear 22 that meshes with a rack 2mb of a third slide plate 21 in which a horizontally elongated guide hole 21a is inserted into the shaft of the upper plate 1a.

Further, an elongated guide hole 23a is inserted into the shaft of the upper plate 1a, and the protruding pin 21c of the slide plate 21 can be slid into the L-shaped guide hole 23b of the regulating plate 23, which can be slid left and right. It has been inserted.

Furthermore, the push-out arm 17 includes a rotating arm 17b that pushes out the disk mounting plate C1 from the case C3, a push-back arm 17C that pushes the disk mounting plate C1 back into the case C3, and a push-back arm 17C that is parallel to the axis of the push-back arm 17c. A projecting pin 17d is provided, and this projecting pin 17d is inserted into a guide hole 23c of the regulating plate 23, which is perpendicular to the guide hole 23a.

Initially, the protruding pin 21c of the slide plate 21 is inserted into the guide hole 23.
It is located at the far end of the portion parallel to the guide hole 23a of b, and prevents the slide plate 21 from sliding. Therefore, the external gear 18b is prevented from rotating via the rack 21b and the intermediate gear 22.

At this time, when the motor 15 rotates, the rotation of the pinion 19 causes the planetary gear 20 to roll around the pinion J19, so that the push-out arm 17 is rotated by the shaft 17a.

Then, the protruding pin 17d slides the guide hole 23c, and the regulating plate 23 is slid along the guide hole 23a.

Then, when the extrusion arm 17 rotates 90 degrees, the regulating plate 2
3, the L-shaped corner of the guide hole 23b reaches the position of the pin 21C, allowing the slide plate 21 to slide.

At the same time, the thrust pin 17d reaches the end of the guide hole 23c, and the rotation of the push-out arm 17 is blocked, making it impossible for the planetary gear 20 to shift, the internal gear 18a begins to rotate, and the intermediate gear 22 and rack 21b to slide the slidable 21.

Reference numeral 25 denotes a carriage plate holder which is suspended by two hanging arms 24 so as to be able to move in an arc with respect to the upper plate 1a.
A fixing arm 26 is rotatably supported on the shaft 25b of a.

When the slide plate 21 slides on the side of the fixing arm 26 and the horizontal plate part 24a as described above, the tip 21
A tension spring 26a is mounted between the fixing arm 26 and the holder 25, and a tension spring 25c is also mounted between the holder 25 and the upper plate 1a.
is mounted.

Pins 25d are erected on the left and right sides of the holder 25, and the slide holes 27a of the fixing plates 27, 28 are slidably inserted into these pins. connected.

Therefore, when the fixing arm 26 is pushed by the slide plate 21, the fixing plates 27, 28 slide through the guide holes 27a.

On the left and right inner surfaces of the holder 25, one support arm 29 for supporting the disk D is rotatably supported on a shaft 25e, and is supported by a spring 29a wound around the shaft 25d. The tip 29b of the arm 29 is urged downward.

This support arm 29 is provided with a cam surface 29c, and the projecting piece 27b of the fixing plate 27, 28 comes into contact with this, so that when the fixing arm 26 is rotated as described above, the projecting piece 27b pushes the cam surface 29c to raise the tip 29b against the spring 29a.

Furthermore, one side of the fixing plate 27 and two horizontal V-shaped fixing grooves 27c are formed on the fixing plate 28.

Furthermore, mounting holes 2 are provided on both sides of the holder 25.
5f is drilled, and the support 31 of the damper 30 is attached to this.

The damper 30 is made of a viscoelastic material such as rubber, and exhibits a vibration absorbing effect. A protruding shaft 32a protruding left and right from the carriage plate 32 is inserted into its center hole 30a, and vibrations from the outside are absorbed into the holder. 25 to the carriage plate 32, so this is prevented.

In addition, from the carriage plate 32, there is one wire on one side and two wires on the other side.
A book fixing shaft 32b is provided to protrude, and this fixing shaft 32b passes through the hole 25g of the holder 25, projects outward, and is inserted into the V-shaped fixing groove 27c by sliding the fixing plate 27.28. In this case, the carriage plate 32 is fixed to the holder 25.

32c is a spring that suspends the carriage plate 32 from the holder 25, balances the weight of the carriage plate 32 and the cities attached to it, prevents the weight from being applied to the damper 30, and prevents vibration absorption of the damper 30. Improving abilities.

A spindle motor 33 is attached to the carriage plate 32, and as shown in FIG. 18, a spindle table 34 is attached to this in advance. It can be attached by inserting the screw from the side and tightening the screw to the carriage plate 32 through the hole 34a of the spindle table 34.

By doing this, the spindle table 34 can be attached to the spindle motor 33 in advance.
The work is easy, the spindle table 34 can be prevented from tilting, and there is no need to use any mounting parts.

Two guide rails 35 for guiding the pickup member 36 are attached to the carriage plate 32.

As shown in FIG. 19, this pickup member 36 has a pickup main body 37 that fits and slides on one guide rail 35, sandwiching the other guide rail 35 from above and below, and a magnet 38 is embedded in the negative side thereof. a slide piece 39, and a screw 40 screwed into the slide piece 39. It is constituted by a connecting piece 42 through which a BS screw 40 is inserted, and a spring 41 is mounted between it and the sliding piece 39.

One end of the connecting piece 42 is fixed to the pickup main body 37.

The magnet 38 attracts the guide rail 35 and the two pieces sandwiching it by its adsorption force to the guide rail 35.
The play in between is shifted to one side to prevent play in the pickup member 36.

The levelness of the pickup main body 37 is adjusted depending on the degree of tightening of the screw 40.

A sub-plate 44 is attached to the carriage plate 32, as shown in FIG. 20, to which a motor 43 for moving the pickup member 36 in the tracking direction is attached, and a protruding shaft 32a to one side of the holder 25 and two fixing shafts are attached to this sub-plate 44. A shaft 32b is attached.

The feed screw 46 is supported by shaft bearings 45a and 45b attached to this sub-plate 44, and the pulley 47 of the feed screw 46 is
a, a belt 48 is placed between the motor 43 and the pulley 47b, and the rotation of the motor 43 is transmitted to the feed screw 46;

On the other hand, a rack 49 that engages with a feed dog 46 is attached to the pick-up member 36, and the pick-up member 36 is sent in the tracking direction as the motor 43 rotates.

In this way, by using the sub-plate 44, the number of holes drilled in the carriage plate 32 can be reduced, and the number of holes drilled in the carriage plate 32 can be reduced.
This increases the strength of the material and eliminates problems such as warpage.

A support piece 50 is attached to the carriage plate 32, and a fulcrum 51a of the clamper support plate 51 is pivotally supported on the support piece 50 by a shaft 50a.
The clamper support plate 51 and the support piece 50
A spring 51b is installed between the two.

53 is a temporary spring attached to the frame 1 and pushes the clamper 52 toward the spindle table 34; 54 is the upper plate 1;
This is a guide body that is attached to a and guides the disk 'sl temporary C3'' when it is pushed out from the case C8 of the magazine C.

A photocoupler PT is attached to the guide body 54 in the direction in which the disk mounting device C1 passes, and the passage of the disk D is confirmed by the reflected light when the disk D passes thereover.

[Operation of the embodiment]

The operation of this player body B will be explained next.

First, a disc D is placed on each disc mounting device C1 of the magazine C, and then inserted through the magazine insertion slot B of the player body B.

The magazine C inserted in this way enters the magazine holder 5, presses the bent part 9b of the arm 9 to rotate it, and when the magazine C has been stored in the magazine holder 5, the switch SW1 closes. .

Then, the motor 7 rotates and the slide plates 2 and 3 are moved forward by the gears 5a and 5b.

As a result of this movement, the locking arm 12 moves from the other end 12C to the recess 2d, so the locking arm 12 rotates under pressure from the spring 12a, and its locking end 12b protrudes into the magazine holder 5, causing the magazine C into the recess C4 and fix the magazine C in that position.

At the same time, the bin 5e of the magazine holder 5 is pushed by the cam holes 2b of the slide plates 2 and 3 and reaches the end of the cam holes 2b, that is, the lowest position, so the magazine holder 5 remains horizontal and reaches its lowest position. Descend to the lowered position.

When the slide Fi3 has completed its movement, the switch S W z is operated, and when it is detected that the lowermost position has been reached, the motor 7 is stopped and the magazine holder 5 is maintained at that position.

Next, when a command to play the desired disc D is received from the remote control device F, the motor 7 reads the mark plate 4 of the slide plate 3 with the photosensor P1 and moves the disc on which the desired disc D is mounted. The placing plate C1 is raised until it matches the height of the rotating arm 17a of the extrusion arm 17, and the motor 7 is stopped and the motor 15 is rotated at the same time by a command related to the photosensor P+ that detects this.

At this time, the sliding plate 21 has its protruding pin 21c set to the regulation v.
Since sliding is prevented by the guide hole 23b of i23, the double-sided gear 18 cannot rotate -f
fLQ.

When the rotation of the motor 15 is transmitted to the small gear 19,
Since the double-sided gear 18 cannot rotate, the planetary gear 20 moves around the small gear 19, so the push-out arm 17 rotates, and the rotating arm 17b is inserted into the hole C1 on the side surface of the magazine C.
Press the side surface of the disk mounting plate C1 from the side.

As a result, the disc mounting plate C1 on which the desired disc D is mounted slides on the guide plate 54 and
It rotates 0 degrees and is pushed out of the case C3.

At this time, the photocoupler Pt connects the disk D.
A check is made to see if disc D is loaded.
h＜Ji! 2, the motor 15 is immediately rotated in the opposite direction, and the push-out arm 17 is rotated in the opposite direction.

Then, the push-back arm 17c pushes the disk mounting plate C1 to the opposite side and pushes it back into the case C2, and at the same time, this is displayed on the remote control device F to inform that the disk D is missing.

If the passage of the disk D is detected by the photocoupler Pt, the motor 15 continues to rotate, and the disk placement 1 is pushed out to 90 degrees by the rotating arm 17b.

In this way, when the push-out arm 17 rotates 90 degrees, the protrusion pin 17d is prevented from rotating by the guide hole 23c, and while the push-out arm 17 is rotating, the regulation plate 3 is blocked by the protrusion pin 17d.
2 moves in the direction of the guide hole 23a, and the protruding pin 21C is positioned at the corner of the guide hole 23b.

As a result, the internal gear 18a can rotate, and the rotation is transmitted to the rack 21b, and the slide plate 2
The tip of 1 is the horizontal plate part 25a of the holder 25 and the fixing arm 2
Hit the side of 6 and press it.

Therefore, the holder 25 rotates the arm 24 and reaches the point where the holder 25 is stopped, and the arm 24 becomes unable to swing the holder 25.

Also, the fixing arm 26 is held at the tip 21e against the spring 26a.
When it is pushed and rotated, the fixing plates 27 and 28 move, and the ■-shaped fixing groove 27c separates from the protruding shaft 32b, making it free, so the carriage plate 32 is supported by the spring 32c and the damper 30. The damper 30 absorbs external vibrations.

The completion of the above operation by the slide plate 21 is completed by the switch S operated by the protrusion 21d of the slide plate 21.
Detected by W z.

On the other hand, the rack 13b of the second slide plate 13 is also meshed with the external gear 18b, and when the external gear 18b cannot rotate, the push-down cam 14a of the clamper push-down cam 14 connected to the slide plate 13 It contacts the clamper support plate 51 and pushes it down against the spring 51b.

Therefore, the clamper 52 is separated from the spindle table 34.

However, when the external gear 38 rotates, the slide plate 13 also slides, rotating the clamper pressing cam 14.
The lower part of the push-down cam 14a contacts the clamper support plate 51, and the lever 52 moves toward the spindle table 34 by the biasing force of the spring 51b.

At this time, the leaf spring 53 helps the clamper 52 approach the spindle table 34 horizontally.

Before the fixed plates 27 and 28 move, the fixed plates 2
The tip 29b of the support arm 29 whose tip 29b has been lowered by 7.28 is in contact with the upper surface of the disk D fed in by the rotation of the disk placement plate C2.

However, as described above, at the same time as the clamper 52 rises, the tip 29b of the support arm 29 also retreats upward due to the slide of the fixed plates 27 and 28, so the disk D is pushed up by the clamper 52 and is centered on the spindle table 34. be done.

When the completion of this operation is detected by the switch SW3 as described above, the spindle motor 33 rotates to drive the disk D, and the motor 43 drives the feed screw 4.
6 and move the pickup member 36 onto the guide rail 3.
5 in the tracking direction, and the disc D is played back.

When the playback of the disc D is finished, or when a command is issued from the remote control device F to stop the playback or to return the disc D to the magazine C, the operation opposite to the above is performed, and the disc D is placed on the disc mounting plate CI. After that, the disk fj device IC is returned to the case C3.

Then, the magazine C descends again to the lowest position and waits.

Next, when there is an eject command for magazine C, motor 7
By the reverse rotation of , the slide plates 2 and 3 slide in the opposite direction, raising the magazine holder 5 to the highest position, and at the same time contacting the surface of the locking arm 12 other than the recess 2d and touching the spring 12a. The locking end portion 12b is pulled outward from the magazine holder 5 against the force.

As a result, magazine C is unlocked, so
The magazine C is pushed by the bent portion 10a of the rotating arm 10,
It is ejected from the player body B.

The carriage plate 32 is provided with an opening 32d at least within the range of movement of the pickup body 37 so that the pickup body 37 can read the signal from the disk D set on the spindle table 34.

Therefore, in order to prevent oil applied to various parts of the carriage plate 32 or other parts from flying off and adhering to the pickup body 37, and to support the wiring to the spindle motor 33 and the pink amplifier member 36, the partition wall 61a is erected. A provided cover plate 61 is attached to the carriage plate 32. This cover plate 61 also serves to increase the strength of the carriage plate 32.

[Configuration and operation of pickup member rank] Next, the pickup member 36 in the multi-disc player described above
The configuration of the rack 49 that is attached to the feed screw 46 and meshes with the feed screw 46 will be explained.

G pickup member 3 as shown in Figures 21 to 23
6, a rigid rank mounting plate 55 is attached to the pick amplifier main body 37.
is fixed, and the shaft 5 is attached to the hanging part 55a.
6 is rotatably inserted into the shaft hole of the rack 49.

A part of the shaft hole of the rack 49 is a notch 49a,
A compression spring 57 having two leg pieces 57a and 57b
is mounted wound around the shaft 56, its leg piece 57a is hung on the rack mounting plate 55, and its leg piece 57b is hung on the rack 49, urging the rack 49 in the direction of meshing with the feed screw 46. .

Then, the rack 49 is pressed against one of the E-rings 56a by the force of the compression spring 57 that tends to expand, thereby eliminating play in the axial direction of the rack 49.

The mesh thread between the feed screw 46 and the rack 49 has a cross section of 3.
Because of the rectangular shape, the component force generated by the sliding resistance of the pickup member 36 tends to separate the rack 49 from the feed screw 46 .

The biasing force in the winding direction of the leg pieces 57a and 57b of the compression spring 57 presses the rack 49 against the feed screw 46 against the above component force, prevents a gap from being formed between the two, and prevents the feed screw 46 from forming.
The rack 49 is designed to move accurately by the rotation of the rack 49.

In addition, in a state where the rack 49 is engaged with the feed screw 46,
The tooth surface of the groove 49 is inclined with respect to a line connecting the tooth surface of the rack 49 and the guide rail 35 (FIG. 19) on the opposite side to the side where the rack 49 is attached to the pickup member 36. There is.

As described above, a load resistance occurs at the contact surface between the rack 49 and the feed screw 46, and this load resistance is perpendicular to the contact surface.

However, since the tooth surface of the rack 49 is inclined as described above, it can be considered as two component forces, one in the direction of the guide rail 35 and the other in the direction perpendicular thereto.

The horizontal component force prevents the guide rail 35 from rattling due to external vibration applied in the horizontal direction, and the vertical component force prevents rattling due to external vibration applied in the vertical direction. Therefore, the rack 49 is tilted about 1 and the guide rail 3
5, the pickup member 36 can be moved while preventing rattling in the horizontal and vertical directions.

24 to 26 show other forms of the rack 49, in which the pickup body 37 has a rigid support piece 58,
The rack 49 is formed of a rank body 59 made of a resin such as polyacetal, and the tooth surfaces of the rack 49 are sloped similarly to those described above.

A thin wall portion 59a is formed in a part of the rack body 59, and the rack 49 is flexibly supported.
A compression spring 60 is housed between the support piece 9 and the support piece 58, and urges the rack 49 in a direction to press against the feed screw 46.

A text surface 59b is formed on the rack body 59, and this text surface 59b is inserted into the square hole 58a of the support piece 58 to prevent the rack 49 from rattling when the pickup member 36 moves in the trunking direction, and to The operation of the rack 49 due to the rotation of the rack 46 is correctly transmitted to the big amplifier member 36.

Further, two protrusions 59c on the left and right sides are formed on the upper surface of the rank body 59 so that they can contact the lower surface of the support piece 58, thereby preventing the rack 49 from contacting the feed screw 46 diagonally. .

This method also produces the same functions and effects as those described above.

Reference numeral 59d denotes a partition wall that prevents oil applied to the feed screw 46 from scattering and adhering to the pickup body 37, thereby interfering with signal reading.

〔Effect of the invention〕

In the present invention, like a ridge, a pickup member supports a rack so as to be movable in a direction perpendicular to the direction in which it is fed by a feed screw, and is urged by a biasing member to engage the rack and the feed screw. It is something that makes you

Therefore, the thread shape of the rank and feed screw is triangular in cross section, and the rank receives a force that lifts it up, but since the biasing member is biased against this force, both always mesh deeply and accurately.

The beak may cause looseness between the rack and the feed screw,
The rack does not lift up, and the engagement between the rack and the feed screw does not become oblique.

Therefore, as the feed screw rotates, the pickup member accurately moves in the tracking direction, and the signal can be reproduced correctly without causing any misalignment with the vibration group or out of focus. It is something.

[Brief explanation of the drawing]

Figures 1 to 27 show one embodiment of the present invention, Figures 1 and 2 are perspective views in an exploded state, Figure 3 is an overall perspective view when mounted on a vehicle, and Figure 4. is a plan view, Fig. 5 is a plan view with most of the upper plate removed, Fig. 6 is a plan view showing the magazine holder and carriage plate, and Fig. 7 is a plan view of the clamper pressing mechanism and carriage plate holder locking mechanism. , Fig. 8 is a plan view of the arm for pushing out the disc shown in Fig. 7 when it has rotated to the pushing state, Fig. 9 is a plan view of the carriage temporary holder shown in Fig. 7 in the locked state, and Fig. 10 shows the magazine and A plan view showing the relationship between the spindle tables, FIG. 11 is a plan view of the disk mounting plate in FIG. 10 rotated to the play position, FIG. 12 is a plan view of the carriage plate holder, and FIG. 13 is a plan view of one side. Fig. 14 is a side view showing the main parts when the magazine holder is in its lowest position; Fig. 15 is a side view showing the position of the magazine holder and the setting relationship of the disk to the spindle table; Fig. 16 is a side view of the carriage plate holder, Fig. 17 is a side view of the disk guide plate and photosensor, Fig. 18 is an oblique view showing the mounting means for the spindle table, and Fig. 19 is a front view showing the support state of the pickup member. Figure 20 is a plan view of the feed screw part, Figure 21 is a slope view of the rack part, Figure 22 is its front view, Figure 23 is its vertical side view, Figure 24 is a rack of another embodiment. 25 is a longitudinal sectional side view thereof, FIG. 26 is a front view thereof, and FIG. 27 is a side view of a conventional example. B... Player body, C magazine, C8... Disc tit temporary, C2... Axis, C1... Case, C4
... hollow, l... frame, ib... shaft, 1c...
...Guide hole, 2.3...Slide plate, 2a...Guide hole, 2b...Cam hole, 2c...Rank, 2d...
... Recessed portion, 4... Mark plate, 5... Magazine holder, 5e... Bin, 6... Shaft, 6a. 6b...Gear, 7...Motor, 8...Reduction gear mechanism, 9...Arm, 9a...Spring, 9b...Folding portion, 1o...Rotating arm, 10a... ...Bending part, 10
b...Spring, 1°C...Gear portion, 11...Resistance gear, 12...Locking arm, 12a...Spring, 12b
...Locking end, 12c...Other end, 13...Slide plate, 13a...Guide hole, 13b...Rack, 1
3c...Connection part, 14...Clamper push-down cam, 1
5... Motor, 15a... Worm, 16... Reduction gear mechanism, 17... Pushing arm, 17a... Shaft, 17b... Rotating arm, 17c... Pushing back arm, 17d ...Protrusion pin, 18...Double-sided gear, 18a.
... Internal gear, 18b... External gear, 18c... Shaft, 19... Small gear, 20... Planetary gear, 21...
・Slide plate, 21a...Guide hole, 21b...Rack, 21c...Protrusion pin, 21d...Protrusion piece, 21e
...Tip, 22--Intermediate gear, 23--Regulation plate,
23 a, 23 b, 23 c - guide hole, 2
4... Hanging arm, 25... Carriage plate holder, 25a... Horizontal plate part, 25b... Shaft, 25c...
Spring, 25d, 25e...shaft, 26...fixing arm, 26a...spring, 27.28...fixing plate, 27
a...Guide hole, 27b...Protrusion piece, 27c...Fixing groove, 29...Support arm, 29a...Spring, 30
... damper, 30a... center hole, 31... damper support, 32... carriage plate, 32a... protruding shaft,
32b... Fixing shaft, 32C... Hanging, 32d...
- Opening, 33... Spindle motor, 34... Spindle table, 34a... Hole, 35... Guide rail, 36... Pick-up member, 37... Bink-up, 38... Magnet , 39... Slide piece, 40... Screw, 41... Spring, 42... Connection piece, 43... Motor, 44... Sub plate, 45a,
45b... Bearing body, 46... Feed screw, 47a, 4
7b... Pulley, 48... Belt, 49... Rack, 50... Support piece, 50a... Shaft, 51... Clamper support plate, 51a... Fulcrum, 51b... Spring ,
52... Clamper, 53... Temporary fly, 54... Guide body, sw,, SW,, sW,, SW4... Switch, P,... Photo sensor, P! ...Photocoupler, 49a...Notch, 55...Mounting plate, 55a...
- Drooping part, 56... Shaft, 57... Compression spring, 57
a, 57 b = leg piece, 58 ... support piece, 58
a...Square hole, 59...Rack body, 59a...Thin wall portion, 59b...Text, 59c...Protrusion, 59d...
・Bulkhead, 60...Spring. Patent applicant Pioneer Corporation Fig. 17 Fig. 32c Fig. 18 Fig. 21 Fig. 22 Fig. 6b Fig. 23 Fig. 24 Fig. 25 Fig. 26 Fig. 0' Fig. 27

Claims (1)

[Claims] a pickup member that is movable on a carriage plate while being guided by a guide member; a feed screw member that moves the pickup member; and a feed screw member that is rotatably supported by the pickup member in a direction perpendicular to the feed screw member and meshes with the feed screw member. 1. A pickup drive device for a disc player, comprising: a rack member that biases the rack member toward a feed screw member;