JPH0538432Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a disc player that reads and reproduces information recorded on a disc, and is particularly concerned with a disc player in a compact disc player suitable for use in a car. This relates to a presser mechanism.

<Prior Art> Conventionally, compact disc players that record information on a disc or read and reproduce information from a disc are provided with a disc holder that presses and holds the disc against a turntable at a playback position.

<Problems to be solved by the invention> By the way, the conventional disc holder is composed of a complicated mechanism incorporating springs, etc., and its assembly process is complicated and the cost is high. Therefore, the main purpose of the present invention is to provide a mechanism that allows the disk holder to be attached to the chuck arm extremely easily, and which can be easily configured with a small number of parts, thereby solving the above-mentioned conventional drawbacks. .

<Means for solving the problem> In order to achieve the above object, the present invention provides a disc player in which a disc holder is attached to the tip of the chucking arm via a chucking holder. The Yatsuking holder consists of a cylindrical part, a plurality of radially extending locking pieces bent at the upper edge of the cylindrical part, and a narrow diameter part bent at the lower end of the cylindrical part, and The chucking arm is integrally processed from a metal plate such as a thin copper plate, and the chucking arm is provided with a plurality of insertion holes spaced apart in a circular direction through which the locking pieces can pass. Narrow grooves are provided on one side of the inner edge of the hole, each running in the same direction on the same circle, and the chucking holder is attached to a dowel protruding from the upper surface of the disc holder via a retaining ring. , the locking piece of the tracking holder is configured to engage with the narrow groove portion.

<Function> Insert the locking piece of the tracking holder configured as above into the insertion hole and rotate it to engage the locking piece with the narrow groove using any fixing screw or the like. The disc holder can be easily attached to the chucking arm with one touch without any trouble. In addition, the tracking holder itself is made of a thin metal plate that is integrally processed, so it is ingenious and has just the right amount of elasticity to effectively press the disk against it.In addition, it can be manufactured at low cost since it has few components. be.

<Example> Hereinafter, the present invention will be described in detail based on an example configured as a car disc player.

The drawings show the internal mechanism with the exterior body removed; FIG. 1 is a plan view, FIG. 2 is a back view, and FIG. 3 is a front view.

Reference numeral 1 is the machine frame of the disc player, and on the front side there are 8cm disc D ₁ and
An opening 2 is provided for selectively putting in and taking out the 12cm disk _D2 .

The upper plate 3 of the machine frame 1 is provided with a pair of left and right guide levers 5, 5 that swing around pivot shafts 4, 4 as fulcrums. These left and right guide levers are connected by a center lever 6 and are configured to operate simultaneously. Further, guide rollers 7, 7 are vertically installed on the guide levers 5, 5, respectively, and when a 12 cm disk D ₂ is inserted, the guide rollers 7, 7 are in contact with the outer peripheral surface of the disk and rotate outward. This causes the guide levers 5, 5 to swing synchronously on the left and right sides as shown by the imaginary lines in the figure. The inserted 12cm disk is therefore always centered. Incidentally, the 8 cm disk is formed so that it can pass through the left and right guide levers 5, 5 without swinging.

Reference numeral 8 denotes a lock lever, which is held swingably about a pivot shaft 10 at the rear of a plunger lever 9 connected to the right guide lever 5 described above. A pin 11 is provided at one end of the tightening lever 7 and comes into contact with the outer peripheral surface of the inserted disk.
is provided, and the other end is interlocked and connected to the start lever 12.

Reference numerals 13 and 13 denote stoppers for the 8 cm disk, which are fixed to the shaft 14, and a gear 15 provided on the shaft 14 meshes with a pinion 16 formed on the plunger lever 9. Further, reference numerals 17 and 17 are stoppers for a 12cm disk.

Further, a drive loading roller 18 for feeding a manually inserted disk to a fixed position is supported by the machine frame 1, and a driven loading roller 19 that cooperates with this drive loading roller 18 is connected to the roller 18. It is supported by a stay 21 below which is connected to a loading arm 20 (described later) (see FIGS. 6 and 7). The loading rollers 18 and 19 are both made of rubber rollers.

As shown in detail in FIG. 8, the driving loading roller 18 is driven by a loading motor 22 via a worm gear 23, a three-tooth integrally molded flexion gear 24, an idle gear 25, and a roller gear 26. It's becoming like that. The flexion gear 24 is attached to the machine frame 1.
A flexion arm 27 is coaxially attached to the flexion gear 24 in a state in which it is always in elastic contact with the side surface of the flexion gear 24 by a spring 28 (see FIG. 1).
Loading gears 29A and 29B integrally molded with two teeth are supported at the tip of the flexion arm 27 via a shaft 29 and an elongated hole 31, and the large diameter loading gear 29A is connected to the flexion gear 24. They are looking shy. Furthermore, the lower end of the gear stopper 30 is engaged with the upper surface of the shaft 29, and when the gear stopper 30 comes off, the flexion arm 27 rotates counterclockwise due to frictional force, and the small diameter loading 92
A is adapted to engage with a loading rack 32 provided on the loading arm 20.

The gear stopper 30 is operated by engaging the start lever 12 at its upper end.

Reference numeral 33 denotes a chuck arm having a disk holder 34 at its tip, which is swingably supported by the machine frame 1 via a pivot shaft 35 at its base end, and is constantly pulled downward by a spring 36. However, when not loaded, it is pushed up by the stud pin 38 of the chucking lever 37. The chucking lever 37 is engaged with the tip of the loading arm 20 via a pin 39 and an elongated hole 40,
As the loading arm 20 swings, it rotates counterclockwise to move the disk holder 34 to the chuck position.

A stop lever 42 that prevents the start lever 12 from returning when it moves to the start position is pivotally supported on the machine frame 1 coaxially with the chucking lever 37. This stop lever 4
2 is also engaged with the pin 39 of the loading arm 20 via an elongated hole 43.

Further, a slide lever 44 that moves in the horizontal direction in conjunction with the loading arm 20 is provided on the machine frame 1, and a slide lever 44 that moves in the horizontal direction in conjunction with the loading arm 20 is provided on the machine frame 1.
A claw 47 of a pick-up chassis 46 supporting the stop lever 44 is configured to engage with an engagement groove 47 provided in the stop lever 44 to stably hold the stop lever 44.

The pick-up 45 is a pick-up support 4.
8, and the pick-up support 48 is movably mounted along two guide shafts 49 fixed to the chassis 46. The pick-up support 48 is connected to a motor 50.
Driven by. Mata pick up 45
The chassis 46 supporting the is attached to the machine frame through cushion members 51 and springs 52 with appropriate cushioning properties.

Furthermore, as shown in FIGS. 10 to 13,
The disk presser 34 is attached to the tip of the chucking arm 33 via a chucking holder 53. This chatting holder 53
A cylindrical portion 53A, a plurality of locking pieces 53B (for example, three) extending in the radial direction bent at the upper edge of the cylindrical portion, and a narrow diameter portion 53C bent at the lower end of the cylindrical portion. It consists of a metal plate such as a thin copper plate that is integrally drawn. Further, the tracking arm 33 is provided with three insertion holes 54 spaced apart in a circular direction through which the locking pieces 53B can pass. Narrow grooves 54A facing in the same direction on a circle
is provided. Therefore, the retaining ring 5 is attached to the dowel 55 formed protruding from the upper surface of the disk holder 34.
After attaching the tracking holder 53 via 6, the locking piece 53B of the tracking holder 53
is inserted into the insertion hole 54 and rotated to engage the locking piece 43B with the narrow groove 54A, thereby making it possible to easily attach the disk holder 34 to the chucking arm 33 with a single touch. . At this time, a locking pin 58 formed on the upper surface of the chuck arm engages with a recess 57 formed at the tip of the locking piece 53B, thereby preventing the chuck holder 53 from rotating.

Next, the operation will be explained.

First, when the loading of the 8 cm disk D ₁ is inserted by hand through the opening 2, the optical sensor 60 detects this and the loading motor 22 rotates, and the driving loading roller 18 and the driven loading roller 19 move the disk into place. D ₁ is sent towards the back. Then, while pushing the lever 8 on the outer circumferential surface of the disk, it is centered by the left and right 8cm stoppers 13 and stopped at a fixed position.

On the other hand, the start lever 12 moves toward the front side of the machine frame due to the movement of the tightening lever 8, and the gear stopper 30 swings to the disengaged position. As a result, the flexion lever 27 is disengaged and rotated counterclockwise due to friction with the flexion gear 24, and the loading gear 29A engages with the loading rack 32 fixed to the loading arm 20. Due to this engagement, the loading arm 20 swings downward together with the rack 32. When the rack 32 and loading gear 24 are moved to a position where they disengage,
It is rotated by the reversing spring 61 to the final downward load position (see FIG. 5).

Along with this rotation of the loading arm 20,
The driven loading roller 19 is also avoided downward.

Further, due to the rotation of the loading arm 20, the chucking lever 37 rotates counterclockwise, and the disc presser 34 presses the disc _D1 to hold the chuck between it and the turntable below. When tracking of this disk is completed, the tracking switch (not shown) attached to it turns ON.
, and the loading motor 22 stops.
At the same time, the stop lever 42 operates to lock the locking pawl 12A of the start lever 12, preventing it from returning and maintaining the loading state.

Simultaneously with the stop of the loading motor 22, the pickup servo motor 50 is driven to move the pickup support 48, and the pickup 45 scans and reproduces the disk recording surface.

When the disc playback is completed, the pick-up support 48 returns to its original position and stops, and the loading motor 22 rotates in the reverse direction. This causes the flexion lever 27 to rotate clockwise and the loading gear 29A to engage with the rack 32. Thereafter, the operation described above is reversed to return to the original position shown in FIG.

Next, the loading operation of the 12cm disk will be explained.

In Fig. 1, when the 12cm disk D ₂ is inserted from the front opening, the rollers 7, 7 of the left and right guide levers 5, 5 are pressed against the guide levers 5, 5.
The center of the disk is aligned by simultaneously pushing outward. Also, as in the case of the 8 cm disk, the loading motor 22 is driven by the optical sensor 60 and the loading roller 1 is driven by the optical sensor 60.
8 and 19, disk D ₂ is sent to the back.

In conjunction with the guide lever 5 on the right side, the plunger lever 9 moves toward the back, and the rack 16
Shaft 14 by meshing with gear 15
rotates and the 8cm disk stopper 13 avoids it upward. At the same time, a 12cm disk selection switch (not shown) is turned on, the plunger 62 is energized, and the plunger lever 9 is attracted and held at the back. This holds the 8cm stopper 13 in the avoidance position. When the disk D ₁ is sent further inward, it is centered by the left and right guide pins 17, 17 while swinging the lock lever 8, and stops at a fixed position.

After this, each part mechanism operates in the same way as for the 8 cm disk described above.

Although typical embodiments of the present invention have been described above, the present invention is not necessarily limited to the structure of the above-described embodiments.
It goes without saying that the present invention can be implemented with appropriate changes within the scope of the effect.

<Effects of the Invention> As described in detail above, the present invention provides a disc player in which a disc holder is attached to the tip of the tracking arm via a tracking holder. It consists of a plurality of radially extending locking pieces bent at the upper edge of the cylindrical part, and a narrow diameter part bent at the lower end of the cylindrical part, and made of a metal plate such as a thin copper plate. Further, the chucking arm is provided with a plurality of insertion holes spaced apart in a circular direction through which the locking pieces can pass, and one side of the inner edge of the insertion hole is provided. are provided with narrow grooves extending in the same direction on the same circle, and the chucking holder is attached to the dowel protruding from the upper surface of the disc holder via a retaining ring, and the chucking holder is Since the locking piece is configured to engage with the narrow groove, the locking piece of the tracking holder is inserted into the insertion hole and rotated to engage the locking piece with the narrow groove, thereby making it impossible to fix anything. You can easily attach the disk holder to the chucking arm with one touch without using any screws, etc., and the chucking holder itself is made of a thin metal plate, making it durable and with just the right amount of elasticity. It has remarkable effects such as being able to press the disk effectively and being able to manufacture it at low cost since it has fewer components.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the disc player according to the present invention with the exterior body removed; Fig. 2 is a rear view thereof;
Fig. 3 is a front view thereof, Fig. 4 is a right side view thereof, Fig. 5 is a right side view similar to Fig. 4 showing a loading state, and Fig. 6 is a left side view showing a feeding state of the loading roller. Fig. 7 is a left side view of a portion of the loading roller showing the non-feeding state, Fig. 8 is an enlarged side view showing the flexion gear portion, Fig. 9 is a right side view showing the chuck arm portion, and Fig. 10 is a partial left side view showing the loading roller in a non-feeding state. FIG. 11 is an enlarged plan view of the chuck holder; FIG. 12 is an enlarged plan view showing the chuck arm insertion hole;
3 is a plan view of FIG. 10. 33... Chucking arm, 53... Chucking holder, 53A... Body of tracking holder, 53B... Locking piece of tracking holder, 53C... Narrow diameter part of tracking holder,
54...Insertion hole, 54A...Narrow groove, 55...Dowel, 56...Keeping ring.

Claims (1)

[Scope of utility model registration request] In a disc player in which a disc holder is attached to the tip of a chucking arm via a chucking holder, the chucking holder has a cylindrical part and a bent upper edge of the cylindrical part. Consisting of a plurality of locking pieces extending in the radial direction and a narrow diameter part bent at the lower end of the cylindrical part,
The locking arm is integrally processed from a metal plate such as a thin copper plate, and the locking arm is provided with a plurality of insertion holes spaced apart in a circular direction through which the locking pieces can pass. Thin grooves are provided on one side of the inner edge of the insertion hole, each running on the same circle and in the same direction, and the chucking holder is inserted into the dowel protruding from the upper surface of the disc holder via a retaining ring. 1. A disc holding mechanism for a disc player, characterized in that the locking piece of the tracking holder is engaged with the narrow groove.