JPH07282508A - Information recording disk performance device - Google Patents

Abstract

PURPOSE: To realize an information-recording disk musical performance device capable of accurately clamping a disk safely even when the musical performance device is miniaturized regarding the information-recording disk musical performance device. CONSTITUTION: This musical performance device has a support base body 8 movably housing and supporting an information recording disk 10 between the place of charging and the place of reproducing performance, a guide means guiding a clamp member 11 for contact-bonding the disk 10 to a turntable 9 in the specified direction in the support base body 8, and a drive mechanism shifting a sliding cam 12 operating the guide means. The guide means is constituted so as to be projected to the outsides of each of a pair of sliding side plates oppositely faced to both side faces of a disk support member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording disk playing device, and more particularly to improvement of a disk clamping structure in a disk clamping device.

[0002]

2. Description of the Related Art An information recording disk reproducing apparatus such as a disk player using an information recording / reproducing disk has a device for mounting the information recording disk on a turntable and then pressing the disk onto the turntable. In particular, a front loading type information recording / reproducing disc device is widely used in a recording / reproducing device having a disc loading / unloading port on the front surface of the device.

FIG. 4A shows a disc clamp mechanism and a turntable which are essential parts of a conventional information recording disc, and FIG. 4B shows details of the clamp portion. As shown in the figure, there is provided a chassis 1 having upright portions 1a and 1b extending upward on both left and right sides, and a turntable 2 is attached to the chassis. An information recording disk 3 is placed on the disk holding surface 2a of the turntable 2. The arrow Y direction indicates the front side of the information disc, the arrow X direction indicates the left side, and the arrow Z direction indicates the upper side.

A support member 4 is provided above the chassis 1 so as to extend in the left-right direction. A pair of cam members 5 and 6 extending in the front-rear direction (the arrow Y direction and the opposite direction) are provided on the outer surfaces of the left and right upright portions 1a and 1b of the chassis 1 so as to be reciprocally movable in the front-rear direction. There is. The support member 4 is a member that rotatably supports a disc-shaped pressure-bonding member 7 for pressure-bonding the information recording disk 3 toward the disk holding surface 2a of the turntable 2. Two pins 4a are provided so as to project at both left and right ends of the support member 4. Each of these pins 4a is slidably fitted in a guide hole 1c formed by extending in the up-and-down direction (the arrow Z direction and the opposite direction) on each of the upright portions 1a and 1b of the chassis 1. The support member 4 is guided up and down.

The pins 4a provided on the left and right ends of the support member 4 are slidably engaged with cam holes 5a and 6a formed in the cam members 5 and 6, respectively. Each cam hole 5
The a and 6a are formed so as to be inclined forward as a whole. That is, when each of the cam members 5 and 6 moves back and forth, the support member 4 moves up and down, and the pressure-bonding member 7 detaches the information recording disk 3 on the turntable 2. In addition, rack portions 5b and 6b are formed on the cam members 5 and 6 along the movement direction thereof, and a drive source (including a gear meshing with the rack portions to reciprocate the cam members 5 and 6 ( (Not shown).

The crimping member 7 has a loose fitting portion 7a which is loosely fitted in a round hole 4a formed in the supporting member 4, and a loose fitting portion 7 at the top thereof.
7b which is integrally connected to a and contacts the surface of the information recording disk 3 on the Rehell side at the lower end, and 7b which is connected to the upper end of the loose fitting portion 7a to prevent the loose fitting portion from coming off the round hole 4a. And a stopper 7c.

With this structure, the crimping member 7 is movable with respect to the supporting member 4 within the range of the height dimension of the loose fitting portion 7a in the direction of the rotation center axis thereof. The crimping member 7 is provided with an annular magnet 12, and the magnet is attracted to the steel plate 2a provided on the turntable 2 to apply a crimping force to the disc.
The cam members 5 and 6 shown in FIG. 4 have cam holes 5a and 6a.
As is apparent from the shape of the above, the support member 4 is moved between the two positions of the non-clamping position and the disc clamping position.

[0008]

Generally, in the information recording player, after mounting the information recording disc on the turntable,
As shown in 5a and 6a of FIG. 4, two cam members 5 and 6 formed on each side are moved back and forth to move the four guide holes 1c of the chassis 1.
Drives the four pins 4a of the disc clamp support member up and down, so that the disc 3 is crimped onto the turntable 2.
To be released. With this mechanism, the chassis 1 has four guide holes 1c and the support member has four pins 4a.
This is to prevent the support member from tilting.

The fact that the cam member has two cam holes necessarily enlarges the cam member. In addition, if the positions of the cam holes are displaced at the front and rear even at least, the support member will not move smoothly. Furthermore, it is necessary to provide two guide holes in the chassis. Therefore, in this clamper mechanism, the accuracy of the cam member is required, and the cam member also becomes large. To solve this, add one cam hole on one side.
Although it is conceivable that the discs are laid one by one, there is a risk that it will be difficult to clamp the disc accurately and safely because the support member tilts back and forth.

In view of the above-mentioned conventional problems, the present invention intends to realize an information recording disk playing device capable of accurately and safely clamping a disk even if it is downsized.

[0011]

In order to achieve the above object, the present invention provides a support base for movably accommodating and supporting an information recording disk between a loading position and a reproducing / playing position, and a disk on a turntable. The guide means is provided with a guide means for guiding the support member for crimping in a predetermined direction within the support base, and a drive mechanism for moving a cam member for moving the support member, and the guide means comprises a pair of sliding members opposed to both side surfaces of the disk support member. The drive side plate is guided by a guide hole provided in a support base that slidably holds a drive pin and a guide guide (guide pin) protruding from the outside. There are cam members with cam holes for driving the drive pins along the guide holes on the left and right sides of the support base, and the cam members are driven forward and backward to be guided by the cam holes provided in the cam member. In the information disc clamp device in which the support member also moves up and down because the pin moves up and down in the guide hole of the support base,
It consists of one cam hole provided in each cam member and one guide hole provided on both sides of the support base. The drive pins are provided on both sides of the support member, and the guide guides (guide pins) are provided directly below or above the drive pins. There is provided an information recording disk playing device characterized by having.

[0012]

Operation: Referring to FIG. 1, the information recording disk 10
After mounting on the turntable 9, by the drive of the drive mechanism,
The drive pin 11a moves up and down along the guide hole 8c, and the clamp member 11 moves between the non-clamp position and the clamp position. At this time, the drive pin 11a moves up and down along the penetrating guide hole 8c because the slide pin 12a slides as the slide cam 12 provided outside the support base 8 moves left and right. Cam hole 1 provided in 12
This is because the drive pin 11a is moved up and down in 2a. Further, the clamp member 11 has a guide guide 11b provided directly below the drive pin 11a so as not to be tilted back and forth. Therefore, when the clamp member 11 moves up and down, the clamp member 11 does not tilt forward and backward, and the clamp member 11 operates accurately and safely. As a result, the size and reliability of the information recording / playing apparatus can be improved.

[0013]

The present invention will be described in more detail with reference to the preferred embodiments shown in the accompanying drawings. In each drawing, only members related to the present invention are shown, and other members are omitted. Referring to the exploded perspective view of FIG. 2, the information recording disk playing device 15 according to the embodiment of the present invention is
Hold the disc tray 17 that holds the disc 16,
A disc tray holder 18 for moving the disc tray up and down at the disc tray pull-out position and the disc playing position,
19, a support member 20 for applying a pressing force to the disk at the disk playing position, and disk clamp members 21 and 21.
2, the supporting member 20 and the disc trays 18, 19
A slide cam 23 for activating the slide cam, a drive mechanism 24 for driving the slide cam, and a support base 2 for supporting them.
5 and 5.

The support member 20 rotatably supports a disc clamp member 21 at the center thereof so that it can freely come out up and down between the disc clamp member 21 and the clamp retainer member 22. Move up and down. Therefore, one drive pin 27 that projects outward from the sliding side plates on both sides of the support member 20 and a guide guide 28 that prevents the support member 20 from tilting left and right when the support member 20 moves up and down are provided directly below the drive pin 27. It is provided in.

As shown in the exploded view of FIG.
Is a U-shaped frame made of a metal plate that holds the support member 20 slidably from the outside. In order to move the disc tray holders 18 and 19 on the left and right side plates up and down at the disc tray pull-out position and the disc playing position. Has a guide hole
The disk tray holders 18 and 19 are provided with pins 31 for moving up and down through the guide holes. Further, it has a guide hole 26 for guiding the support member 20 to the disc tray pull-out position and the disc playing position, and the drive pin 27 and the guide guide 28 of the support member 20 slide in the guide hole 26. Further, the guide pin 2 for supporting the slide cam 23
9 is attached.

The slide cam 23 for driving the disc tray holders 18, 19 and the supporting member 20 has a guide hole 32 for guiding the drive pin 27 of the supporting member 20 and a guide pin 31 attached to the disc trays 18, 19. It has guide holes 33a and 33b for guiding. Further, the guide pin 29 attached to the support base 25 is provided with a guide hole 34 of the slide cam 23.
It penetrates through a and 34b. The slide cam 23 slides back and forth within the range of the through guide hole.

As shown in FIG. 2, the drive mechanism includes a motor 37 fixed to a motor bracket 36 fixed to a fixed side plate 35 above the support base 25, and a gear train 24 arranged on the outer surface of the motor bracket 36. The output of the motor 37 is transmitted to the slide cam 2 and the gears 40 attached to both ends of the shaft 38 pivotally supported by the support base 25 are driven.
Power is transmitted through the rack gear 41 provided on the drive shaft 3 to drive the slide cam 23.

When the slide cam 23 slides back and forth as described above, the drive pin 27 provided in the support member 20 is guided to the guide hole 32 provided in the slide cam 23, and the guide hole provided in the support base 25. Go up and down in 26. That is, the support member 20 moves from the position most distant from the disc holding surface to the disc clamp position.

The operation of the information recording disk playing device 15 of the present embodiment thus constructed will be described with reference to FIG. When the disc 42 is mounted on the disc tray 17 at the disc tray pull-out position, the motor 37 of FIG. 2 rotates, the shaft 38 rotates via the gear train 24, and the gear 40 attached to the shaft rotates, the gear Since the rack gear 41 meshing with is extended forward (Y direction), the slide cam 23 moves forward (Y direction). When the slide cam 23 moves forward, the guide hole 3
As the drive pin 27 penetrating the guide hole 26 provided in the support base 25 through the guide hole 26 is moved downward (-Z direction) by the guide hole 26, the support member 20 also moves downward (-Z direction). -Z direction) and crimp the disk 3 to the turntable. The information recording disc is then played.

According to this embodiment described above, as described above,
The drive pin 27 provided on the support member 20 is a support base 25.
Through the guide hole 26 provided in the slide cam 23, and also through the guide hole 32 provided in the slide cam 23. Further, the support member 20 has a guide guide 28 provided below the drive pin 27, and the guide guide 28 penetrates the guide hole 26. When the support member 20 moves vertically due to the guide guide 28 that is integrated with the drive pin 27,
The support member is prevented from tilting in the front-rear direction, and operates accurately and safely.

FIG. 3 shows another embodiment of the present invention. In the above embodiment, the guide guide 28 of FIG. 2 is the guide guide 28 continuous with the drive pin 27, but as shown in FIG.
3 and the guide pin 44 are formed independently, the same effect is obtained.

[0022]

As is apparent from the above description, according to the present invention, a disc clamp is provided in a support base of an information recording disc in a guide hole provided in the support base for guiding a disc clamp support member. With a structure that has a guide guide to prevent the support member from tilting to the left and right when moving up and down, it is possible to move the disc clamp support member under accurate and smooth guidance, and also to support the disc clamp. It is possible to downsize the slide cam that drives the member. As a result, simplification of the disc clamper mechanism can be promoted while maintaining a high degree of operational reliability of the information recording disc playing device.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an information recording / playing device according to the present invention.

FIG. 2 is an exploded perspective view showing an information recording / playing device according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view showing an information recording / playing device according to another embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a conventional information recording and playing device.

[Explanation of symbols]

 15 ... Information recording disk reproducing device 17 ... Disk tray 18, 19 ... Disk tray holder 20 ... Disk clamp support member 23 ... Slide cam 24 ... Drive mechanism 25 ... Support base 26, 32 ... Penetration guide hole 27 ... Drive pin 28 ... Guide Guide 37 ... Drive motor

Claims (1)

[Claims] 1. A turntable disc holding surface is provided with a protrusion on the turntable that fits into a center hole of an information recording disc, and the protrusion is used to center the disc and hold the disc on the turntable disc. A member that is crimped to the surface, a support member that is movably provided in a plane perpendicular to the disk holding surface, and that rotatably supports the crimp member within a predetermined range in the direction of the rotation center axis, A support base for movably supporting the support member between the disc holding position and the initial position, guide means for guiding the support member in a predetermined direction within the support base, and moving the support member within the support base. The guide means has one drive pin projecting outward from the outer surface of each of the pair of sliding side plates of the support member, and the guide mechanism below the guide pin. The id has one guide hole for vertically guiding the drive pin and the guide guide in each of the pair of fixed side plates of the support base, and a pair of cam members for driving the drive pin and a drive means for moving the cam member. An information recording disk playing device including: wherein the driving means moves the support member to a disk holding surface from a position farthest from the disk holding surface and presses the disk onto the disk holding surface. Information recording disk playing device.