JP2583108Y2 - Multi-type disc player - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-disc player capable of reproducing a plurality of discs such as CDs (compact discs) arranged side by side on a turntable in a desired program order. The present invention relates to an improvement in a holding mechanism for holding a turntable so as not to move during reproduction.

[0002]

2. Description of the Related Art Conventionally, as a multi-type disc player, a turntable for mounting a CD is provided on a slide table in a casing, and a substrate on which a pickup, a disc support, members for driving them, and the like are mounted on a slide table is hinged. And the free end of the substrate is linked to a rotating cam body provided on the slide table side, and the cam action of the rotating cam body moves the substrate upward from a tilted posture to a horizontal posture for reproduction. 2. Description of the Related Art A disk player configured to support a CD on a turntable with a support is known.

[0003]

In the multi-type disc player having the above structure, during reproduction of the CD at the back of the turntable, the slide table is pulled out by about half in that state, and other CDs on the turntable can be freely released. Can be replaced. However, when the CD is replaced, if the turntable is moved or vibrated by mistake, it is transmitted to the reproducing unit, causing sound skipping or the like.

[0004] In order to solve the above-mentioned problem, the applicant of the present application has previously filed Japanese Utility Model Application No. 3-85858, and has a multi-type equipped with a holding mechanism for firmly holding a turntable so as not to move when a CD is replaced. A disk player was proposed.

FIGS. 5 (a), 5 (b), 6 and 7 show examples of the above-mentioned prior-art disc player. In the figure,
Reference numeral 1 denotes a slide table, which is housed in a casing (not shown) so as to be freely taken in and out. Reference numeral 2 denotes a turntable, which is supported on the slide table side with its bearing 3 as a center of rotation.

Reference numeral 4 denotes a chassis supported on the slide table, and reference numeral 5 denotes a sub-chassis. The sub-chassis 5 is rotatably supported by a plate base 7 provided on the chassis 4 by a leaf spring hinge 6. A board 8 is supported by the sub-chassis 5. A pickup 9, a disc support 10, and members for driving them (reference numerals are omitted) are attached to the substrate 8. A cam engaging pin 11 is attached to the free end side of the sub-chassis 5.

A predetermined portion of the chassis 5 includes a rotating cam 1
2 is rotatably supported by the camshaft 13. The rotating cam body 12 has two spiral cam surfaces 12 divided into upper and lower parts.
a, 12b, the cam engaging pin 11 is engaged with the lower cam surface 12a, and the rotation of the cam body 12 causes the sub-chassis 5 supporting the pin 11 to rotate.
The substrate 8 is moved upward from the inclined posture in FIG. 1B to the horizontal posture in FIG.

A rod member 14 for cam engagement is penetrated at a predetermined portion of the chassis 4, and is penetrated and supported by another holder 15 on the chassis 4.
The lower end of the rod-shaped member 14 is kept engaged with the spiral cam surface 12b of the rotary cam body 12. On the other hand, the turntable 2 is provided with an opening 17 for inserting the rod-shaped member 14 at a position corresponding to each CD mounting portion.

The rotary cam body 12 is driven to rotate by a transmission path of a motor 18, a belt 19, a pulley 20, a gear 21, and a gear 22.

[0010] In the disk player having the above structure,
During the reproduction of the CD, the substrate 8 supporting the pickup, the disk support and the like by the rotation of the rotary cam body 12 is shown in FIG.
From the inclined posture of FIG. 5A to the horizontal posture of FIG.
At the same time, the rod-shaped member 14 moves upward by the rotary cam body 12 and is inserted into the opening 17 of the turntable 2. As a result, the turntable 2 is firmly held at the CD reproduction position. Therefore, according to the above configuration, there is no possibility that the turntable is moved due to a change of the CD during the reproduction of the CD (during the performance).

Further, as described above, the rod member 14 for preventing rotation of the turntable is not in direct contact with the sub-chassis supporting the substrate 8 which requires vibration isolation, and is in contact with the chassis 4 on the slide table side. Since it is provided, it is difficult for the vibration when the turntable is forcibly rotated during the performance to be transmitted to the substrate. Furthermore, the timing of the vertical movement of the substrate 8 and the vertical movement of the turntable locking rod 14 can be easily set.

According to the above-described turntable holding mechanism of the prior application, the turntable is securely locked during the reproduction of the disc, so that the effect of reliably preventing sound skipping or the like which is likely to occur at the time of disc replacement can be obtained. There is still room for improvement as described below.

That is, the rotary cam body is rotatably supported, and the cam engaging pin 11 is held by and engaged with the cam surface 12a of the rotary cam body 12, and the rotation of the rotary cam body 12 This allows the pin 11 to move up and down along the cam surface 12a while engaging the cam surface 12a. Therefore, if the turntable 2 is not at a fixed position due to a malfunction or the like, the turntable 2 is not inserted into the opening 17 even if the rotary cam body 12 is rotated to raise the substrate 8 and the rod-shaped member 14 is raised. When the rotary cam body 12 comes into contact with the lower surface of the rotary member, the rotary cam body 12 is stopped by the rod-shaped member 14 because it is pressed. Therefore, as a release method in such a case, for example, a mechanism for reversely rotating the rotary cam body 12 is required, and there is a disadvantage that the structure is complicated and the cost is increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to propose a configuration in which there is no need for a means for releasing a stop of a rotary cam body due to a malfunction or the like in a turntable holding mechanism of a multi-type disc player.

[0015]

In order to achieve the above object, the present invention provides a turntable for mounting a disc on a main table, and one end of a substrate having a reproducing member assembled on the main table is rotatable. The free end of the substrate is linked to a rotating cam provided on the main table side, and the substrate is displaced from the inclined position to a horizontal position for reproduction by the rotating cam, and is vertically moved by the cam. In a multi-type disc player in which a slidable bar-shaped member is engaged with an engaging portion of the turntable to hold the turntable, the rotary cam body is configured to be vertically movable, and the rod-shaped member is The point is that the rotary cam body is lowered when it comes into contact with the turntable.

[0016]

[Action] If the rod-shaped member comes into contact with the turntable when it is not in the fixed position due to malfunction or the like, the rotating cam body will descend.
Since provoking below, since it continues to rotate without stopping, it can return to its original position.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below.
FIGS. 1 to 4 show an embodiment of the multi-type disc player according to the present invention, wherein the same reference numerals as those in FIGS. 5 to 7 denote the same or similar members.

In this embodiment, the structure different from that of the prior application is the structure of the rotary cam body 12 and its support mechanism. That is, as shown in FIG. 4, the rotating cam body 12 is formed with a spiral one-sided cam surface 12c (second cam portion) facing downward so as to give priority to descending.
The board 8 is urged upward by a spring 23 so that the cam engaging pin 11 is engaged with the cam 2c. Rotating cam body 1
2 is fitted to the rotating shaft 24 so as to be slidable up and down and the spring 2
5 upwardly. Further, as described above, the rod-shaped member 14 is pressed against the cam surface 12b of the rotary cam body 12 by the spring 16. The substrate 8 is pivotally supported as described above or by a suitable rotation shaft 26.

Since this embodiment is configured as described above, it is in the state shown in FIG. 2 at the start of operation. In a normal operation state, the turntable 2 is at a fixed position, and when the rotary cam body 12 rotates, the pin 11
, The substrate 8 rises and the rod-shaped member 14
Is raised by the cam surface 12b and inserted into the opening 17 to be in the state shown in FIG. 1, and the turntable 2 is fixed.

On the other hand, when the turntable 2 is not at a fixed position due to malfunction or the like, the rod-shaped member 14 and the substrate 8 are raised by the cam surfaces 12b and 12c by the rotation of the rotary cam body 12, but the rod-shaped member 14 is opened. 17, the rotary cam body 12 is pressed against the lower surface of the turntable 2 without being inserted into the lower surface. As a result, the rotating cam body 12 descends as shown in FIG. 3, so that its rotation does not stop but starts to rise again, and the rod-like member descends by the cam surface 12b to return to the initial position in FIG.

[0021]

According to the present invention, as described above, the turntable holding mechanism of the multi-disc disc player is configured so that the rotation of the rotary cam body does not stop due to malfunction or the like. Since the release mechanism is not required, the structure is simple and inexpensive, and the reliability of the holding mechanism is improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a turntable holding state according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the above embodiment at an initial position.

FIG. 3 is a schematic diagram showing a descending state due to a malfunction or the like of the embodiment.

FIG. 4 is a perspective view showing an example of a rotary cam body in the embodiment.

FIG. 5 shows an example of the prior application, in which (a) is a longitudinal sectional view of a main part of a turntable holding mechanism at the time of reproducing a CD, and (b).
FIG. 4 is a longitudinal sectional view of a main part of a turntable holding mechanism when a CD is not reproduced.

FIG. 6 is a plan view of the turntable in the example of FIG.

FIG. 7 is an exploded perspective view of a reproducing mechanism and a turntable holding mechanism in the example of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slide table 2 Turntable 4 Chassis 5 Subchassis 6 Leaf spring hinge 8 Substrate 9 Pickup 10 Disk support 11 Cam engagement pin 12 Rotating cam body 12a, 12b, 12c Spiral cam surface 13 Cam shaft 14 Cam engagement rod member 15 Holder 16 Spring 17 Opening 18 Motor 19 Belt 20 Pulley 21, 22 Gear 23, 25 Spring 24 Rotary shaft

Claims (3)

(57) [Scope of request for utility model registration] A disc mounting turntable is provided on a main table, one end of a substrate on which a reproducing member is assembled is rotatably supported on the main table side, and a free end of the substrate is provided on the main table side. The substrate is displaced from the inclined position to a horizontal position for reproduction by the rotating cam body, and a rod-shaped member slid up and down by the cam body is engaged with the engaging portion of the turntable. In the multi-disc player configured to engage and hold the turntable, the rotating cam body is configured to be vertically movable, and when the rod-shaped member contacts the turntable, the rotating cam body is moved. A multi-type disc player characterized by being lowered. 2. The rotating cam body has first and second elevating cam parts, the first elevating cam part is engaged with a free end of the substrate, and the second elevating cam part is the rod-shaped member. 2. The multi-type disc player according to claim 1, wherein an upward biasing force is applied to the rotating cam portion while engaging with the rotating cam portion. 3. The multi-type disc player according to claim 2, wherein an upward biasing force is applied to the substrate.