JPS6227463B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a centering mechanism for an autoloading disc player, and its feature is that two guides are in contact with the outer periphery of the disc and move in opposite directions in the left and right directions. A member, a detection pin that contacts the outer periphery of the disk and moves rearward and interlocks with the slide stopper, and a detection pin that is provided on the slide stopper and stops the slide stopper according to the moving position of the guide member, that is, the size of the disk. Since it is constructed with a guide groove that determines the position, that is, the amount of movement of the detection pin, centering can be performed with an extremely simple mechanism, and the operation is reliable.

Conventionally, autoloading record players require a centering mechanism to load the record and position it on the turntable, but this mechanism is commonly used for records of various sizes. The centering mechanisms that are available generally have complex structures, are large, and operate unreliably.

An object of the present invention is to provide a disk centering mechanism that is compact, has a simple structure, and can be expected to operate reliably.

An embodiment in which the present invention is applied to a record player will be described with reference to the drawings.

An opening into which a record is inserted is provided on the front surface of the player cabinet, and a mechanism for detecting the size of the inserted record and centering it is provided on the top plate just inside the opening.

A turntable is provided behind the turntable, and a center spindle mechanism is provided above the turntable for holding a centered record in its center hole and transferring it onto the turntable.

FIG. 1 is a plan view of a mechanism for detecting the size of an inserted record and centering it, and FIGS. 2 and 3 are a front view and a side view thereof, respectively.

The bottom of the opening has a sliding surface SF that serves as a guide when inserting a record.

Adjacent to the inside of the opening, racks 14 and 15 which are interlocked in opposite directions by a gear 13 are supported so as to be movable in the left-right direction (see FIGS. 4 and 5).

Guide rollers 16 and 16' are provided at the right end of the rack 14 and the left end of the rack 15 at positions equidistant from the gear 13, respectively.
5 in the horizontal direction.

In the part extending rearward from the left end of rack 15,
Lock pin 1 urged upward by leaf spring 19
8 is provided and engages with the slide stopper 1 and the lock plate 2 as appropriate.

A reset spring 17 is also coupled to the rack 15 for returning the racks 14 and 15 to the positions shown in FIG.

At the rear of the rack, a detection arm 8 having a detection pin 9 is supported so as to be horizontally rotatable about its left end 8b, and is biased clockwise by a spring 12 (Figs. 6 and 7). reference).

The detection pin 9 is urged upward, its upper end is pressed by the guide plate 10, and the detection pin 9 is lowered to a position where it comes into contact with the outer periphery of the inserted record.

A drive pin 8c is provided protruding from the detection arm 8.
It engages with the guide groove 1a of the slide stopper 1.

The slide stopper 1 is supported so as to be movable in the front-rear direction, and includes a guide wall 1c that comes into contact with a lock pin 18 provided on the rack 15, a convex portion 1d, and a slide stopper 1.
e, it has a guide groove 1a engaged with the drive pin 8c of the detection arm 8, and a micro switch 3 operated by the lock plate 2 (see FIG. 8).

A lock plate 2 is provided on the slide stopper 1 so as to be movable in the left-right direction, and is biased rightward by a spring 4.

The lock plate 2 includes hook-shaped locking parts 2b, 2c, and 2d that lock the lock pin 18 in cooperation with the guide wall 1c, and a protrusion 2a that is pressed by the reset plate 5 when the locking is released. An operating piece 2e is also provided for operating the micro switch 3 when the lock plate moves to the left (see FIG. 9).

The reset plate 5 is supported at both ends by two horizontally rotating arms 6, 6', moves in parallel in the horizontal direction, is biased clockwise by a spring 22, and is mounted on a rack 58. cam part 5 of
It pivotally supports an L-shaped lever 7 that engages with the lever 8b (see FIG. 10).

When the lever 7 is inserted into a record and the rack 58 moves backward, the spring 22 is extended and the lever 7 rotates counterclockwise, causing the cam portion 58b of the rack 58 to rotate.
I'm starting to run away from it.

The guide plate 10 rotates in the vertical direction 2
The book is supported by arms 11 and 11' so as to be able to move vertically in parallel, and is urged upward by a spring 21 (see Figs. 11 and 12).
(see figure).

The guide plate 10 presses the detection pin 9 provided on the detection arm 8 downward and restricts it to a position where it abuts the edge of the inserted record.

A rack 58 to which the drive guide 60 is fixed is supported so as to be movable in the front-back direction, and a cam 58a provided on the lower surface of the rack 58 is in contact with a cam 10a of the guide plate 10.

The rack 58 is driven by a pinion gear 103 fixed to the turntable shaft via a drive cam 83 having two missing teeth, a drive direction switching assembly 86, and transmission gears 75 to 79 (see FIG. 13 and (See Figure 14).

A starting plate 84 and a signal plate 85 are provided on the drive cam 83 facing the two toothless portions, and are rotated by a relay 100 and a starting plate 102 to start the drive cam 83.

Also, the drive cam has a lock plate 98.
The cam 83a contacts the cam 83a to determine the stop position, and the drive pin 9 of the assembly 86 switches to the drive direction.
1 and a sliding surface 83b having a step in contact with each other are coaxially fixed (see FIGS. 16 and 17).

The drive direction switching assembly 86 has three gears 93a, 93b and 94 supported by a rocking plate 88 having an arm provided with a drive pin 91, and slides every half rotation of the drive cam 83. It is swung in the opposite direction due to the step on the surface 83b.

Accordingly, gear 93a or gear 93b selectively meshes with transmission gear 75.
-79 is reversely rotated to reverse the driving direction of the rack 58.

Guide plates 61 and 62 are provided parallel to the moving direction of the rack 58 (that is, in the front-rear direction with respect to the player cabinet), and each has a front end bent upward and a rear end bent downward. I did 2
Book guide grooves 61a, 62b, 62a and 62b
is provided. (See Fig. 15) The drive guide 60 fixed to the rack 58 is slidably supported on guide plates 61 and 62, and two hanging parts are provided on both sides of the drive guide 60, respectively. Slanted grooves 60a and 60b
is provided.

A spindle assembly 64 that holds an inserted record in its center hole is engaged with the guide grooves of the guide plates 61 and 62 and the inclined groove of the drive guide 60 by four guide pins 67 (13th (See Figures 1-15).

Then, as the rack 58 moves rearward, the spindle assembly 64 first descends along the bend at the front end of the guide groove, then moves horizontally rearward, and when it reaches above the turntable, the spindle assembly 64 descends along the bend at the front end of the guide groove. It descends further along the bend at the rear end of the groove.

The spindle assembly 64 is provided with a holder 71 below the center spindle 69 for holding a record having a small center hole (see FIG. 18).

Additionally, an adapter assembly 74 is supported by the center spindle 69 so as to be slidable in the vertical direction.
A plurality of holders 79 are provided for holding records having a large center hole (see FIG. 20).

The holder 71 for the small center hole is provided eccentrically on the center spindle 69, and moves in and out of the center spindle as the rotation axis of the holder 71 rotates.

The rotating shaft has a bent part 72 at its upper part, and as the spindle assembly 64 moves backward,
The bent portion 72 contacts the angle plate 63 and rotates counterclockwise, and the holder 71 projects to a position where it engages with the center hole of the record (see FIG. 19).

The three holders 79 for large center holes are always urged inward by a spring 81 applied to a pin 80, and the holders 79 for small center holes
1 protrudes, it is pushed from the inside and protrudes to a position where it engages with the center hole of the record (see FIGS. 18 and 20).

When the spindle assembly 64 is lowered onto a record having a small center hole, the adapter assembly 74 rests against the edge of the center hole of the record, and only the holder 71 is lowered into the center hole. (See Figure 21).

Next, its operation will be explained.

When the record R is inserted through the opening, its outer periphery comes into contact with the guide rollers 16 and 16', causing the racks 14 and 15 to move in the left-right direction. When the record is further pushed in, the detection pin 9 of the detection arm 8 The detection arm 8 is rotated backward. (See Fig. 23) As the detection arm 8 rotates, the slide stopper 1 moves rearward, and when the center hole of the record comes to the lowered position of the center spindle 69, the lock pin 18 of the rack 15 It comes into contact with the guide wall 1c of the slide stopper to prevent the movement of the slide stopper 1 and the detection arm 8 (the second
(See Figure 4).

The guide wall 1c is provided so as to be inclined with respect to the moving direction of the slide stopper 1, and the guide wall 1c comes into contact with the lock pin 18 depending on the outer diameter of the record (that is, depending on the amount of movement of the rack 15). The contact points are different, and records of all sizes are centered in the same position.

Immediately before the lock pin 18 comes into contact with the guide wall 1c, the lock pin 18 locks the lock plate 2 according to the size of the record.
The lock plate 2 is moved slightly to the left by coming into contact with the slope of any one of the protrusions 2b, 2c, and 2d.

By moving the lock plate 2, the micro switch 3
is operated to generate a signal for completing centering and starting the next operation.

When the lock pin 18 falls into the groove of the convex portion 2b, 2c or 2d, the lock plate 2 is again moved to the right by the spring 4 and reset (see FIG. 8).

When the centering of the inserted record R is completed, the relay 100 is activated by a signal from the micro switch 3, and the starting plate 84 is moved to the drive cam 83 via the kick plate 102 and the signal plate 85.
protrude into the missing tooth.

The starting plate 84 contacts a convex portion coaxially fixed to the pinion gear 103, rotates the drive cam 83 a little, and engages with the pinion gear (first
(See Figure 6).

When the drive cam 83 rotates, the rack 58 is driven via the drive direction switching assembly 86 and the transmission gears 75 to 79, and starts moving rearward.

As the rack 58 moves, the convex portion 58 on its lower surface
a is removed from the cam 10a of the guide plate 10, the guide plate 10 is moved upward by the spring 21, and the detection pin 9 of the detection arm 8 is raised to a position where it does not interfere with the movement of the record (see FIG. 12).

At the same time, the drive guide 6 fixed to the rack 58
0 also moves rearward, and the four guide pins 67 that are engaged with the inclined grooves 60a, 60b move into the guide grooves 61a, 61b, 62a, 62b of the guide plate.
The spindle assembly 64 descends onto the record R (the first
(See Figure 5).

If the center hole of the record is small, only the center spindle 69 fits into the center hole, and if the center hole is large, the entire adapter assembly 74 fits into the center hole (see FIGS. 21 and 22).

As rack 58 (i.e., drive guide 60) moves further rearward, spindle assembly 64
moves horizontally backwards, and the bent portion 72 of the rotary shaft contacts the angle plate 63 and rotates counterclockwise, causing the holder 71 (or holder 79) to protrude below the record and hold the record. Hold.

Spindle assembly 64 is a turntable
When reaching above the TT, the guide pin 67 descends along the bend at the rear end of the guide groove of the guide plate, and the spindle assembly 64 lowers the record onto the turntable.

The record is pressed and held on the turntable by an adapter assembly 74 or a pressing member 75, and is held by a holder 71 (or holder 79).
further descends a little further and leaves the record (see Figure 21C and Figure 22C).

At this time, the drive cam 83 rotates to a position where the toothless portion on the opposite side faces the pinion gear and stops.

A well-known tone arm lead-in mechanism lowers the tone arm (not shown) into the lead-in groove of the record to begin playing.

When the performance ends and the tone arm reaches the lead-out groove, the tone arm is returned to its original position by a well-known auto-return mechanism, and at the same time, the relay 100 operates and the drive cam 83 begins to rotate.

The drive pin 91 of the drive direction switching assembly 86 is now connected to the sliding surface 83 of the drive cam 83.
The rack 58 is brought into contact with the large diameter portion of b and swung in the opposite direction to when inserting the record, thereby moving the rack 58 forward (see FIG. 16).

As the rack 58 moves forward, the spindle assembly 64 goes through the exact opposite process of inserting the record, transporting the record to the centering position, releasing it, and rising away from the record.

The rack 58 pushes down the guide plate 10 with its convex portion 58a, and the guide plate 10 pushes down the detection pin 9 of the detection arm 8.

Also, the cam portion 58b of the rack 58 comes into contact with the lever 7 of the reset plate and moves the reset plate 5 to the left, which pushes the protrusion 2a of the lock plate 2 and slides it to the left, thereby locking the lock pin 18. Release it from the protrusion 2b, 2c or 2d.

The detection arm 8 is rotated clockwise by the reset spring 12, and the detection pin 9 comes into contact with the outer periphery of the record and moves it forward.

At the same time, the slide stopper 1 also moves forward, and at the position where the maximum diameter of the record comes out from the opening, the lock pin 18 is attached to the protrusion 1d or 1e.
contacts and stops, preventing further rotation of the detection arm 8.

If you take out the record (by hand), it will be easy 15
The lock pin 18 moves to the right along the front surface of the protrusion 1d or 1e of the slide stopper 1 and is removed from the protrusion, the slide stopper 1 moves forward, and the detection arm 8, racks 14 and 15 are moved to the right. Return to the state shown in Figure 1.

Note that the protrusions 1d and 1e of the slide stopper 1 have sloped surfaces on their rear sides, so that when the slide stopper 1 comes into contact with the lock pin 18 of the rack 15 while the slide stopper 1 is moving backwards when inserting a record, climbs over this along the slope (see Figure 25).

Although the above embodiment has been explained using a record player as an example, it is not limited to this.
The present invention can be used commonly by any player that uses a disc-shaped record carrier.

As explained above, the centering mechanism of the autoloading disk player of the present invention includes a guide member and a detection pin that abut against the outer periphery of the disk and move in the left-right direction and rearward, and a detection pin that moves in the front-back direction to move the disk. The mechanism is extremely simple, and it is possible to reliably center various disks with different diameters. be.

[Brief explanation of the drawing]

1, 2, and 3 are respectively a plan view, a front view, and a side view of a centering mechanism according to an embodiment of the present invention, and FIGS. 4 and 5 are respectively,
Plan view and front view of the guide roller part, No. 6
7 and 7 are respectively a plan view and a front view of the detection arm portion, FIG. 8 is a plan view of the slide stopper, FIG. 9 is a plan view of the lock plate, and FIG. 10 is a plan view of the reset plate. The plan view, FIGS. 11 and 12 are respectively a plan view and a side view of the guide plate portion, and FIGS. 13, 14 and 15 are a plan view, a front view and a front view, respectively, of the record transfer mechanism. Side view, Figures 16 and 17
The figures are a plan view and a front view of the drive direction switching mechanism, FIG. 18 is a front view of the spindle assembly, FIG. 19 is an operation explanatory diagram showing the protrusion and retraction of the center spindle holder, and FIG. 20 is A plan view of the holder of the adapter assembly, FIG. 21 is an explanatory view of the operation showing how a record with a small center hole is held, and FIG. 22 is an explanatory view of the operation showing how a record with a large center hole is held. , FIG. 23 and FIG. 24 respectively,
FIG. 25 is an explanatory diagram showing the operation of each member of the centering mechanism when inserting a record disc. FIG. 25 is an explanatory diagram showing the movement of the lock pin. 1...Slide stopper, 1a...Guide groove, 1c...Guide wall, 8...Detection arm, 8c
... Drive pin, 9 ... Detection pin, 13 ... Gear,
14 and 15...Rack, 16 and 16'...
...Guide roller, 18...Lock pin.

Claims (1)

[Scope of Claims] 1 (a) two guide members provided on two racks that interlock in opposite directions in the left-right direction and abut against the outer periphery of the inserted disk; and (b) two guide members that abut against the outer periphery of the disk. (c) a detection pin that contacts and moves rearward and interlocks with a slide stopper that moves in the front-rear direction; and (c) a lock pin that is provided on the slide stopper at an angle with respect to the direction of movement of the slide stopper and that is provided on one side of the rack. What is claimed is: 1. An autoloading disk player, comprising a guide wall that abuts, and centers an inserted disk at a fixed position regardless of its size. 2. Claim No. 2, characterized in that the detection pin is provided on the rotating detection arm, and the drive pin of the detection arm engages with a guide groove provided in the slide stopper in the left-right direction. The autoloading disc player according to item 1.