JPS61137262A - Disk loading mechanism - Google Patents

Abstract

PURPOSE:To drive a disk clamper by a DC motor having a low rating, to reduce the variance of loads and to expand the freedom of load setting by extending a coil spring between a roller plate and a clamper holder and carrying in/out a disk or clamping the disk in accordance with the movement of the roller plate. CONSTITUTION:When a carry 6 is manually moved between a disk replacing position and an autoloading start position and a rack plate 11 is driven between the autoloading start position and a disk reproducing position, the carry 6 is automatically moved in the horizontal and vertical directors along the L- shaped groove of a subchassis 7. At the disk reproducing position, the disk is clamped on the turn table by a disk clamper 31. Since a coil spring 22 extended between the roller plate 12 and the clamper holder 23 is acted so as to accelerate the lift of the roller plate at the lift of the disk clamper 31, the load applied to a clamper driving part is reduced smaller than that of disk clamping.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Industrial Application Field This invention provides a system for loading disc-shaped recording media (hereinafter referred to as discs), such as video discs, compact discs, and vinyl records, to a predetermined position (autoloading) behind the disc exchange position. This invention relates to a semi-automatic loading mechanism that automatically loads and unloads the disc between the disc playback position (starting position) and the disc playback position.

(B) Conventional technology Conventionally, a disc clamper is provided at the tip of an arm that is pivotally supported at the rear end of a disc player and is always urged downward by a coil spring or leaf spring, and the arm is rotated when loading a disc. A disk clamp mechanism is known in which the disk clamp can be clamped four times in a row.

However, this type of motor uses an NC motor to raise the disc clamper against the biasing force, but in this case a larger load is applied than when clamping the disc, so a DC motor with a higher rating is required. needed to be used.

Furthermore, when the disk clamper is biased using a leaf spring, there is a drawback that the load varies widely and a large disk clamping load cannot be obtained.

(c) Problems to be solved by the invention The purpose of this invention is to improve the above-mentioned drawbacks of the conventional device.The disc clamper can be driven by a DC motor with a low rating, and the variation in load is small. It is an object of the present invention to provide a disk loading mechanism incorporating a disk clamp mechanism with a high degree of freedom in setting loads.

(d) Means for Solving the Problems In order to achieve the above object, the disk loading structure I of the present invention consists of a horizontal portion and a vertical portion continuous below the rear end. The Zabu chassis is equipped on both the left and right sides, and is connected to the horizontal part and behind it, gradually - [! A pair of left and right rack plates that are driven in the forward direction by encroaching the guide holes consisting of the slanted portion of the sub-chassis and the guide holes of the rack plates are commonly engaged. 1 - left and right roller plates with protruding rollers, a carry that is supported movably in the front and back direction by a pair of left and right roller plates and on which the disc is placed, and a clamper holder that moves with the roller plates. The disc clamper presses the disc onto the turntable at the disc playback position, and a coil spring is stretched between the roller plate and the clamper boulder.

<E) Operation The carry is moved manually between the disc exchange position and the O1~loading start position, and the carry is moved to the subchassis by driving the rack plate between the autoloading start position and the disc playback position. The disc is automatically moved horizontally and vertically along the 1-shaped groove, and the disc is clamped onto the turntable by a disc clamper at the disc playback position.

When the disc clamper is raised, the coil spring stretched between the roller plate and the clamper holder works to help the roller plate rise, so the load on the clamper drive unit is smaller than when the disc is clamped.

(f) Embodiments Examples of the present invention will be described with reference to the drawings.

A disc player consists of a turntable provided in the center, a disc playback mechanism, a carry for placing the disc, an autoloading mechanism for moving the carry between an autoloading start position and a disc playback position, and a disc to be placed on the turntable. It consists of a disc clamp mechanism for clamping, a front door that is always urged to the closed position by a spring, etc.

<Schematic operation> Figure 1 shows the state in which the kit 6 on which the disc 8 is placed is at (a) the disc exchange position, (b) the loading start position to the O1, and (c) the disc playback position. Yes, first, the general operation of disk loading will be explained.

When the eject key is pressed in the carry storage state (the state in which the carry 6 is in the (c) disc playback position), the front door 17
When asked, the carry 6 is carried out to the (b) autoloading start position, so pull it out by hand to the (b) disc exchange position, place the disc 8 on the carry 6 at this position, and then move the carry 6 to the (b) position. When pushed to the auto-loading start position, the auto-loading mechanism starts, pulling the Kitry 6 into the carry storage position (c) above the disc playback position, and then lowering it to the disc playback position to play the disc. Start.

After playback is complete, press the eject key again to return to Carry 6.
(B) will be automatically carried out to the auto-loading start position, so manually pull it out to the (B) disk replacement position, remove the disk 8, and then push it in again to the (B) auto-rope ink start position to start the auto-loading mechanism. Then, it enters the carry storage state.

<Autoloading Mechanism> FIG. 2 is an exploded perspective view showing the support mechanism and autoloading mechanism of the carry 6.

Both left and right sides of the sub-chassis 7 are vertically bent upwards, and L-chamber holes 7a are formed in the front and rear portions of the bent portions on both sides, respectively, which are made up of a horizontal portion and a vertical portion continuous to the lower part of the rear end. There is.

Rack plates 11 are supported on the outside of the left and right bent portions of the sub-chassis 7 so as to be slidable in the front-back direction, and are driven by left and right synchronized gears 14 fixed on the same axis to move in the front-back direction in synchronization.

Each rack plate 11 has a guide hole 11a consisting of a horizontal portion at the front end and an inclined portion that is connected to the rear end and gradually rises.
are formed at the front and back, respectively.

Roller plates 12 are provided inside the left and right bent portions of the sub-seat shift, and two front and rear rollers 21 protruding from the outer surface of each roller plate 12 are attached to the L of the rib chassis 7.
It is commonly engaged with the chamber hole 7a and the guide hole 11a of the rack plate 110.

Therefore, as the left and right rack plates 11 move in the front-rear direction, the rollers 21 (i.e., the roller plates 12) move horizontally and vertically along the L-chamber holes 7a of the sub-chassis 7, as shown in FIG. do.

The left synchro gear A4 that drives the rack plate 11 has a collar portion 14a on the outside thereof.
The position of the lower part of the rack plate 11 is controlled by a to prevent it from shifting outward.

A one-sided clutch consisting of a spring and a stopper is provided as part of the drive force transmission mechanism that connects the synchro gear 14 and a drive motor (not shown), and the synchro gear 14 is always directed in the direction in which the rack plate 11 is carried out. As a result, if the carry 6 is pushed in with excessive force at the autoloading start position, the spring of the clutch absorbs the force and buffers it.

When the rack plate 11 is at the autoloading start position, its actuator section (not shown) presses an autoloading start switch (not shown) provided on the back side of the sub-chassis 7, thereby stopping the drive motor. When the carry 6 is manually moved from the disk exchange position to the autoloading start position, by pushing the carry 6 a little further, the rack plate 11 moves backward, away from the autoloading start switch, and the drive motor starts. .

<Carry support mechanism> Three rollers 18a are installed inside the left and right roller plates 12.
, 18b, 18c and a leaf spring 19 are provided, respectively, and are engaged with roller grooves 6b formed in the front-rear direction on both left and right sides of the carrier 6, respectively.

When the disc is in the disc exchange position, the key 6 is in the front 2
It is supported by a pair of rollers 18a and 18b, and by two rear rollers 18b and 18c when in the disc playback position.

The distance between the three rollers is that the distance between the front rollers 18a and 181) is small, and the distance between the rear rollers 18b and 113c is large. The amount is large, and the carry 6 is stably supported at the disc playback position.

As shown in FIG. 3, the roller groove 6b of the carry 6
is slightly wider at the front end, so that when the carry 6 is in the disc playback position, the front roller 188 is substantially separated from the upper and lower walls of the roller groove 6b, so that the support of the carry 6 is The rollers 18b and 18c of the set are reliably transferred.

When the carry 6 is at the autoloading start position and the disc playback position, the engagement recess 6C is formed in the roller groove 6b at a position facing the leaf spring 19, and when the carry 6 moves from the disc exchange position to the autoloading start position. The carrier 6 is held on the roller plate 12 by the protrusion at the tip of the leaf spring 19 engaging with the engagement recess 6C.

When pulling the carry 6 forward from the autoloading start position, by pulling it forward with a certain amount of force, the plate spring 19 and the engagement recess 6G are disengaged, and the carry 6 can then be pulled out to the east.

When the projection at the tip of the leaf spring 19 engages with the engagement recess 6C of the roller groove 6b, the carry 6 is slightly pulled rearward by the inclined surface of the projection of the leaf spring 19, and the front roller 18a moves into the roller groove. The carrier 6 and the roller plate 12 are accurately positioned by contacting the front end of the roller plate 6b.

A carry switch 20 operated by the carry 6 is provided on one of the roller plates 12 (see FIG. 2), and the carry switch 20 is operated by the galley 6 when the carry 6 is mounted on the roller plate 12.

While the autoloading mechanism is operating and the roller plate 12 is moving backwards, if the carry 6 becomes unable to move for some reason, such as being held down by hand or a foreign object gets caught, the leaf spring of the roller plate 12 19 is disengaged from the engagement recess 6C of the carry 6, only the roller plate 12 moves a little, and the carry switch 20 detects this and stops or reverses the operation of the A-loading mechanism.

<Carry> As shown in FIG. 4, a disk mounting portion 6a consisting of a concave portion slightly larger than the disk 8 is formed on the upper surface of the carry 6. A cutout into which the turntable is inserted is formed toward the end.

The rear part of the disk mounting section 6a, that is, the carry 6
The part that is located inside the player body 1 when the disc is in the disc exchange position becomes gradually deeper toward the rear.
Thereby, the disk 8 can be inserted and placed in the disk mounting portion 6a in a state slightly inclined from horizontal.

<Disk Clamp Mechanism> FIG. 5 shows an exploded perspective view of the disk clamp mechanism.

The left and right sides of the clamper holder 23, which supports the disc clamper 31 on the lower center surface, are bent vertically, and engagement grooves 23a and 2 are formed at the front and rear of the bent portions, respectively.
3b engages with the left and right roller plates 12 (between the roller 21, the roller plate 12, and the subchassis 7),
The clamper holder 23 moves together with the roller 21 (ie, the roller plate 12) as shown in FIG.

The rear engagement groove 23a is formed in the horizontal direction, and the front engagement groove 23b is formed in the vertical direction. It is urged downward by a coil spring 22 provided between the arm 12a and the arm 12a.

The disc clamper 31 is supported by the clamper holder 23 via a ball joint (not shown), and is tilted at an appropriate angle so as to compress and support the disc 8 with a uniform force when pressed onto the turntable. do.

Note that by forming the front engagement groove 23b in an arc shape centered on the rear engagement groove 23a, it is possible to prevent slight horizontal movement due to the vertical movement of the front end of the clamper holder 23. .

Movement of Roller Plate> FIG. 6 shows the movement of the roller plate 12 as the rack plate 11 moves, and FIG. 7 shows the movement of the clamper holder at that time.

When the rack plate 11 is at the frontmost position as shown in FIG. 6(A), the roller 21 is located at the top (
) and the horizontal part of the L chamber hole 7a, and when the rack plate 11 moves backward, the roller 21
It also moves horizontally backwards.

As shown in the same figure (b), the roller 21 is
When it reaches the vertical part of the guide hole 11a, it stops horizontal movement, and as the rack plate 11 moves further backward, it descends along the vertical part of the L chamber hole 7a and finally stops when it reaches the horizontal part of the guide hole 11a. do.

That is, the roller plate 12, the carry 6, and the clamper holder 23 move horizontally from (a) the autoloading start position to (b) the carry storage position, and then vertically descend to (c) the disc playback position.

As shown in FIG. 7, at a position slightly above where the clamper holder 23 reaches the disc playback position, the lower surface of the disc 8 on the carry 6 comes into contact with the turntable 2, and then the disc clamper 31 moves the disc 8 When the roller plate 12 comes into contact with the upper surface of the disc clamper 31 and further descends, the biasing force of the coil spring 22 is applied to the disc clamper 31.

For disc ejection, an operation completely opposite to the above-mentioned operation is performed.

(1~) As described in detail of the invention, the disk loading (
The structure consists of a sub-chassis with one-chamber holes on both left and right sides, each consisting of a horizontal part and a vertical part connected below the rear end, and a horizontal part connected to the rear of the sub-chassis with a gradually rising slope. A right and left one-phase rack plate that is driven in the front-rear direction and has guide holes consisting of a portion and a left and right rack plate that has guide holes consisting of 7') and 11 parts, and a left and right rack plate that has protruding rollers that commonly engage with the 1-shaped hole of the leave chassis and the guide hole of the rack plate. A turntable that includes a set of roller plates, a carry that is supported movably in the front and rear direction by the left and right sets of roller plates and on which the disc is placed, and a clamper holder that moves with the roller plates to place the disc in the disc playback position. A disc clamper that is crimped onto the top,
Consisting of a coil spring stretched between a roller plate and a clamper holder, the disk is moved in and out by the movement of the roller plate, and the disk is clamped. Since the load applied to the disc clamp is smaller than when clamping the disc, a DC motor with a lower rating can be used. Also, since there is no spring placed on the top of the disc clamper, the disc clamping mechanism can be thinner, and a tension spring can be used. Therefore, compared to compression springs and leaf springs, the degree of freedom in setting the load is greater and the variation in load is smaller.

[Brief explanation of the drawing]

Fig. 1: A perspective view of a disc player using the disc loading mechanism of the present invention Fig. 2: An exploded perspective view of the carry support mechanism and autoloading mechanism Fig. 3: Side view showing the roller groove of the carry Figures and horizontal sectional view Figure 4... Carry plan view and longitudinal sectional view Figure 5.
・・Disassembled perspective view of the disc clamp mechanism Figure 6 ・Explanatory diagram of the movement of the l-lar plate accompanying the movement of the rack plate ・・Dimensions and operation explanation of the movement of the carry and disc clamper Figure 6...Carrier...Zub chassis 7a...L-shaped hole 11...Rack plate 11a...Guide hole 12...Roller plate
21... [1-ra 22... Coil spring 23... Clamper holder 31... Disc clamper

Claims (1)

[Scope of Claims] (a) A subchassis having an L-shaped hole on both left and right sides, each consisting of a horizontal part and a vertical part connected to the lower part of the rear end; (c) A pair of left and right rack plates that are driven in the front-rear direction and have guide holes that are provided with guide holes that gradually rise. A pair of left and right roller plates with protruding rollers; (d) a carry that is supported by the pair of left and right roller plates so as to be movable in the front-rear direction and on which a disk-shaped recording medium is placed; and (e) a carrier that moves together with the roller plates. It consists of a disc clamper, which is installed on the clamper holder and presses the disc-shaped recording medium onto the turntable at the disc playback position, and (f) a coil spring stretched between the roller plate and the clamper holder. ) A disk loading mechanism characterized by loading and unloading a disk-shaped recording medium and clamping the disk by moving a roller plate.