JPS62183068A - Information recording disk player - Google Patents

Abstract

PURPOSE:To improve the assembling performance by engaging a guide means with the 1st support plate to attain the relative positioning with a turntable, fixing the guide means while being clipped between the 1st and 2nd support plates and providing a drive means onto the 2nd support plate. CONSTITUTION:The guide means guiding a carriage 17 along a disk carrying face 4a of a turntable 4, that is, the recording face of an information recording disk 18, consists of a fitting means comprising a guide path 1a of a support plate 1, a guide shaft 13, a coil spring 14 and a spherical member 15, of an adjusting means comprising a spherical member 23 and an adjusting screw 24, of a spring member 31 as an energizing means and of peripheral small components relating them above. Further, a drive means driving the carriage 17 consists of a screw shaft 5, bearing members 6, 7 on a support plate 2, a motor 11, a spur gear 11a, an arm member 26, a half nut 30, a spring member 31 as a compressing contact means and peripheral small components relating to them.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an information recording disc player, and in particular to a PCM
The present invention relates to a disc player that plays a digital audio disc on which signals are recorded.

Background technology A disc player that plays a digital audio disc, for example, irradiates a signal hole (bit) recorded on the disc with a laser beam, detects a change in reflected light depending on the presence or absence of the signal hole, and reads the signal. There is a so-called optical signal detection method. FIG. 8 shows the main parts of an optical signal detection type disc player that has already been developed.

As shown in FIG. 8, a key 11 ridge 103 carries an optical pickup means including an objective lens 102 for irradiating a spot light onto the recording surface of the disk 101.
is provided. The carriage 103 is supported so as to be freely movable by two guide shafts X-105 arranged parallel to the disk 1u holder 104a of the turntable 104. Both guide shifts t7ft”
Reference numeral 105 indicates a support for supporting the turntable 104 (1 side), and a fixed spring 107 and a screw 1 on the base member 106.
08 (=J+). This base member 106 is made of aluminum or the like and is die-cast.Although not shown, on the base member 106, A driving means for driving the carriage 103 along the guide shaft 105 is provided.The base member 106 is also provided with a frontage 106a so that the carriage 103 can move therein.

The relative positional dimensions of the turntable 10/l and the guide shaft 105 must be set with high precision.

For this reason, the base portion vJ106 needs to be formed with high precision and great rigidity.

However, since the drive means and the like are also attached to the turntable 104 and the guide shaft 105 on the base member 106 as shown in J-E above, the shape of the base member becomes complicated, and it is difficult to move the base member with high precision. It is not necessarily easy to form a material with a predetermined rigidity.
, the cost was high. Furthermore, since many parts are attached to the base member 1013, which cannot be expected to be deformed, the efficiency of one assembly operation is reduced.

Summary of Defense The present invention has been made in view of the above-mentioned points, and its purpose is to provide a support mechanism for supporting a turntable, an optical pickup means, etc. that is inexpensive, easy to assemble, and easy to assemble. 1 f+1 recording disc player
It is to serve two servings.

The information recording disc player according to the present invention includes a carriage carrying an optical pickup means, a guide means for guiding the carriage, a drive means for driving the carriage, a support mechanism for supporting the turntable, etc. comprising first and second support plates spaced apart in a direction substantially perpendicular to the plane and coupled to each other, the turntable being attached to the first support plate, and the guiding means being connected to the first support plate. 1
The drive means is engaged with the plate and positioned relative to the turntable, and is fixed by being sandwiched between the first and second support plates, and the drive means is provided on the second support plate. It is characterized by being

Embodiment Hereinafter, an information recording disc player as an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the disc player has a support mechanism consisting of a pair of support plates 1 and 2 arranged in parallel. The support plate 1 is a steel plate,
Further, the support plates 2 are made of resin and are connected to each other by screws 3.

A turntable 4 is mounted on the support plate 1, the support plates 1.2 being spaced apart by a predetermined distance 43 in a direction perpendicular to the disk carrying surface 4a of the turntable.

Disposed between the support plates 1 and 2 is a disk 1 [screw shirt extending parallel to the support plate 4a]-5 of the turntable 4. The screw shaft 5 is rotatably supported at both ends by a pair of bearing members 6 and 7 provided on the support plate 2. Further, the screw shaft 5 is movable within a predetermined range along its rotation center axis. Incidentally, the support plate 2 is integrally formed with a pawl portion 2a that prevents the screw shaft from coming off from the bearing member 6°7.

As shown in FIG. 3, a moving member 9 made of a steel plate is arranged below the screw shaft 5, and is attached to the support plate 2 so as to be movable along the screw shaft 5.

The movable member 9 is adapted to engage with the end of the screw shaft 5 at an elevated surface 9a formed at one end of the movable member 9, thereby urging the screw shaft 5 toward the bearing member 6. A cut-and-raised portion 9 formed approximately at the center of the moving member 9
In b, a force is applied to the moving member [4 forces (=
A coil nup ring 10 serving as a J-supplying means is connected. A motor 11 is provided on the support plate 2 and on the side of the screw shaft 5. One spur gear 11a is attached to the output shaft of the motor 11, and the spur gear 5a fitted on the screw shaft 5 and this spur gear 11a are attached to the output shaft of the motor 11.
are in a frenzy. The thickness of the spur gear 11a is sufficiently large, so that even if the screw shaft 5 moves within a predetermined range in the direction of the rotation center axis, the spur gear 5a will not separate from the flat PJ 11a.

The guide shaft 1 is parallel to the screw shaft 5.
3, and is supported at both ends by leg portions 2C formed on the support plate 2. As shown in FIGS. 4(a'') and 4(b), a coil spring 14 is compressed between the guide shaft 13 and each leg portion 2C.

Further, a spherical member 15 is interposed between the guide shirts 1 to 13 and the coil spring 14. That is, the guide shaft 13 is positioned relative to the turntable 4 by engaging the lower surface of the support plate 1 at both ends thereof, and is fixed by being held between the support plates 1 and 2. There is. The coil spring 14 and the spherical member 15 constitute a mounting means for mounting both ends of the guide shaft 13 to the above-mentioned support mechanism (consisting of support plates 1-1 and 2).

As shown in FIG. 4(b), the coil spring 14
are shifted by C from each other so that the center axes of the coils do not intersect with the center axis of the guide shaft 13. With this configuration, wobbling of the guide shaft 13 in a direction parallel to each of the support plates 1 and 2 can be suppressed.

As shown in FIGS. 1 and 2, the guide shaft 1
3, the carriage 17 is slidably supported at the center of gravity. The carriage 17 carries an optical pickup means including an objective lens 19 for irradiating a spot light onto the recording surface of an information recording disc 18 (shown in the first diagram) to be played.

As shown in Figures 1, 2 and 5(b),
A holder 21, which forms a part of the carriage, is attached to one end of the carriage 17 in the moving direction with a screw 22. As shown in FIGS. 1, 2, 6(a) and 6(b), the holder 21 has a circular groove 21a formed therein which is substantially perpendicular to the disk supporting surface 4a of the turntable 4. , a spherical member 23 is inserted into the circular groove.

This spherical member 23 is in sliding contact with a guide path 1a (shown in the first diagram) formed in parallel with the guide shaft 13 on the lower surface of the support plate 1, which is a part of the support mechanism. Also,
The holder 21 has a tapered portion 24a formed at its tip, and an adjustment screw 24 that engages with the spherical member 23 at the tapered portion is screwed into the holder 21. The spherical member 23 and the adjusting screw 24 constitute an adjusting means for adjusting the inclination angle of the gear ridge in a plane perpendicular to the moving direction of the carriage 17. That is, by rotating the adjustment screw 24, the inclination angle of the carriage 17 is adjusted. In addition, the spherical member 23 and the adjustment screw 24
That's I! By configuring the adjustment means using low-lying members, the assembly work is easy and the cost is low.

As shown in FIG. 6(a), the center axes of the adjusting screws 24 are deviated from each other by an amount such that they do not pass through the center of the spherical member 23. This prevents rattling.Also,
The adjustment screw 24 is provided parallel to the moving direction of the carriage 17. Therefore, no matter where the carriage 17 is stopped on the guide shaft 13, the guidance 11
By inserting an adjusting screwdriver parallel to the foot 13, the adjusting screw 24 can be rotated. That is, it is only necessary to provide one opening for inserting a driver in the player housing of the information recording disc player.

As is clear from Figures 1 and 2, key ↑-ridge 1
7 is guided by a guide shaft 13 and a guide path 1a (shown in the first figure) of the support plate 1, with one side in the moving direction of the carriage being supported by one inch, and one objective lens carried by the carriage is guided by the guide path 1a of the support plate 1 (first illustration). It is arranged on the other side of the side and is located outside the main surface of the support plate 1. To elaborate further, the objective lens 19 is attached to the support plate 1.
J3 is located outside the outer contour of the support plate in a plane parallel to the main surface of the support plate. This configuration allows the support plate 1 to be made smaller. If the carriage 17 is held and guided on both sides by the guide shaft 13, the support plate 1 that positions the guide shaft must be extended eight times from the above-mentioned side of the gear ridge 17 to the other side. This is because it must be made into something as big as it is.

As shown in FIGS. 1, 2, and 5 (a) and (b'), a holder 21 provided on the carriage 17 has an arm member 26 attached to one end thereof with a screw 27 and a washer 28. It is swingably attached via the The center axis of the screw 27, that is, the center axis of swing of the arm member 26 is parallel to the screw shaft 5, and therefore, the arm member swings in a plane perpendicular to the center axis of rotation of the screw shirt 650. A half nut 30 as a nut member is provided at the free end of the arm member 26,
The half nut is threadedly engaged with the screw shaft 5. Further, the arm member 26 has a long hole 26a formed in the arm member and extending in a direction substantially perpendicular to the rotation center axis of the screw shaft 5, which is fitted into the screw 27 so as to rotate freely. It is supported by the screw. That is, the arm member 26 is movable within the range of the elongated hole 26.1 in a direction substantially perpendicular to the rotation center axis of the screw shaft 5.

The above-mentioned screw shaft 5. Guide shaft 13.
When assembling the carriage 17, the arm member 26, etc., the relative positional dimensions of the screw shaft 5 and the carriage 17 in a direction substantially perpendicular to the direction of carriage movement may deviate from the normal relative positional dimensions. The arm member 26 is swingable around the screw 27, and the long hole 26a allows the arm member 26 to move in a direction substantially perpendicular to the rotation center axis of the screw shaft 5. This deviation is corrected.

As shown in FIGS. 1 and 5(b), a spring member 31 is fitted into a cylindrical portion 21c formed on the boulder 21 into which the screw 27 is inserted. Spring member 31
One end of the spring member engages with a protrusion 21d protruding from the end surface of the holder 21, and the other end of the spring member engages with a protrusion 21d protruding from the end surface of the holder 21.
6. The spring member 31 acts as a pressure contact means that urges the arm member 26 so that the half nut 30 described above comes into pressure contact with the screw shaft 5. In addition, this spring member 31 is such that the spherical member 23 provided on (the holder 21 of) the carriage 17 is attached to the support plate 1.
The carriage is also used as a biasing means for biasing the carriage so as to approach the guide path 1a (see FIG. 1).

As shown in FIG. 5<b>, a half nut 30 provided at the free end of the arm member 26 is disposed between the screw shaft 5 and the support plate 1, and as shown in FIG. , the half oak 1- has a guide path 1a (
A protrusion 30a is formed with a slight gap (see figure P41).

In addition, as shown in FIGS. 1, 2, and 5(b), the half nut 30 is provided with a screw that slides on the screw shaft 5 to allow the half nut 30 to swing in the direction along the rotation center axis of the screw shaft. A semi-cylindrical regulating portion 30b is formed to regulate the. By providing this regulating portion 3011, the half nut 30, and hence the arm member 26, can smoothly move along the screw shaft 5 without swinging in the direction of the rotation center axis of the screw shaft 5.

Here, the guide path 1a of the support plate 1 described above, the guide shaft 13, the mounting means consisting of the spring 14 and the spherical member 15, the adjusting means consisting of the spherical B11 material 23 and the adjusting screw 24, and the above-mentioned biasing By the spring member 31 as a means and the peripheral small members related thereto,
The gear ridge 17 is connected to the disk supporting surface 4 of the turntable 4.
In other words, a guiding means for guiding the recording surface of the information recording disk 18 is configured. Also, the screw shaft 5, the bearing members 6 and 7 on the support plates 1 and 2, the motor 11, and the spur teeth! -ff11a and arm member 2
6, the half knot 30, the spring member 31 as the pressure contact means, and the peripheral small members related to these,
A driving means for driving the carriage 17 is configured.

As is clear from the above description, this drive means is provided on the support plate 2.

As shown in FIGS. 1 to 3, the support plate 2
The detection switch 33 is arranged above so that the actuator 33a thereof engages with the vertical surface 9C formed at the end of the moving member 9. Further, as shown in FIG. 3, there is a movement regulating member 34 that comes into contact with the end of the carriage 17 in the moving direction to regulate the movement of the carriage at its home position, that is, at its rest position before playing. It is provided. This movement regulating member 34 is integrally formed with the support plate 1.

Detection for detecting that the carriage 17 has reached the home position and stopping the carriage by the above-mentioned detection switch 33, movement regulating member 34, moving member 9, and coil spring 10 as a biasing means. Stop means are configured.

The flexible print 1 to the base plate 35 shown in FIGS. 1 and 2 supply power to the optical pickup means in the carriage 17 and transmit the L signal.

The operation of the information recording disc player described above is shown in Fig. 7 (a).
) and (b) will be briefly explained.

Screw shirt by the rotation η of the motor 11]
-5 is rotated, and the carriage 17 is driven via the half nut 30° arm member 26 and spring member 31 to move in the direction of the arrow claw. As shown in FIG. 7(a), when the carriage 17 reaches the home position, it comes into contact with the movement restricting member 34 and its movement is restricted. Then, as shown in FIG. 7(b), the screw shaft 5 moves in the direction of the arrow claw due to the reaction force, and the moving member 9 also moves accordingly. This movement of the moving member 9 is detected by the detection switch 33, and the carriage 17 is stopped. Thereafter, the carriage 17 is driven in the direction opposite to the arrow, and a performance is performed.

As described in detail in the Effects of the Invention section, the information recording disc player according to the present invention includes a carriage (17) carrying an optical pickup means, a guide means (guide shaft 13) for guiding the carriage, and a drive means for driving the carriage. The support n 4M that supports the driving means (screw shaft 5, motor 11, etc.) and turntable (4), etc.
The turntable comprises first and second support plates (1, 2) spaced apart in a direction substantially perpendicular to the disk carrying surface of the turntable and coupled to each other; 1), the guide means engages with the first support plate made of a steel plate or the like, and is positioned relative to the turntable, and is held between the first and second support plates. The driving means is provided on the second support plate (2) made of resin or the like.

In this way, only the part behind the support mechanism that is necessary to ensure the relative positioning of the turntable and the guide means is made of steel plate, etc., which is formed at low cost and with high precision, so that the support grain tank can be improved. The overall cost is lower. Furthermore, the second support plate made of resin or the like can be easily assembled because its deformability or elasticity can be utilized when each component is attached to it.

Further, since both the support plates are connected to each other at a predetermined distance as described above, the rigidity of the support R1,1,1, and the rest is sufficiently large.

[Brief explanation of drawings]

1 and 2 are a perspective view and a plan view, respectively, of the internal structure of an information recording disc player according to the present invention, and FIGS. 3 to 6(b) are partially detailed views of the internal structure, Figures 7(a) and (b) are diagrams for explaining the operation of the information recording disc player, and Figure 8 is a diagram for explaining the already developed disc player P.References of main parts Description 1.2...Support plate 1a...Guide path 4...Turntable 5...Screw shaft 6.7...Bearing Member 9...Moving member 10.14...Coil spring 11...
... Motor 13 ... Guide shaft 15.23 ... Spherical member 17 ... Carriage 18 ... Information recording disk 19 ... Objective lens 24...Adjusting screw 24a...Tapered portion 26...Arm member 30...Half nut 30a...Protrusion 31...・Spring member 33...Detection switch 34...Movement regulating member

Claims (1)

[Claims] A support mechanism, a turntable supported by the support mechanism, a guide means, a drive means, and an optical pickup means are supported and guided by the guide means and drive means in a direction substantially parallel to the disk supporting surface of the turntable. a carriage that is mounted and driven; the support mechanism includes first and second support plates spaced apart in a direction substantially perpendicular to the disk carrying surface and coupled to each other; The guide means is attached to the first support plate, and the guide means is engaged with the first support plate to be positioned relative to the turntable, and is held between the first and second support plates. An information recording disc player, wherein the information recording disc player is fixed, and the driving means is provided on the second support plate.